CN108136685B - Method for producing fiber-reinforced resin structure, system for producing fiber-reinforced resin structure, and fiber-reinforced resin structure - Google Patents
Method for producing fiber-reinforced resin structure, system for producing fiber-reinforced resin structure, and fiber-reinforced resin structure Download PDFInfo
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- CN108136685B CN108136685B CN201680059521.1A CN201680059521A CN108136685B CN 108136685 B CN108136685 B CN 108136685B CN 201680059521 A CN201680059521 A CN 201680059521A CN 108136685 B CN108136685 B CN 108136685B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
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- Moulding By Coating Moulds (AREA)
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Abstract
A method for producing a fiber-reinforced resin structure 1, comprising the steps of: a step of forming a semi-cured additional structure portion in which a thermosetting resin is in a semi-cured state by filling the thermosetting resin into a groove of a mold formed corresponding to the shape of the additional structure portion; a step of forming a semi-cured main body part in which a thermosetting resin of a fiber-reinforced resin is in a semi-cured state; pressing and heating the semi-cured additional structure part and the semi-cured main body part in the groove of the mold, so as to cure the thermosetting resin of the semi-cured additional structure part and the semi-cured main body part, and bonding the additional structure part and the main body part; and a step of detaching the mold from the additional structure portion.
Description
Cross reference to related applications
The present application is based on japanese patent application No. 2015-208949 filed on 23/10/2015, the contents of which are incorporated herein.
Technical Field
The present invention relates to a method for producing a fiber-reinforced resin structure, a system for producing a fiber-reinforced resin structure, and a fiber-reinforced resin structure.
Background
In recent years, attention has been paid to structures using fiber-reinforced resins such as carbon fiber-reinforced resin (CFRP) and glass fiber-reinforced resin (GFRP) that are lightweight and strong. For example, such a fiber-reinforced resin structure has been applied to a housing of an electronic device such as a computer and a mobile phone (see patent document 1).
However, when a structure such as a housing of the electronic device is molded, it is necessary to form fine additional structural parts such as projections and ribs in the main body of the fiber-reinforced resin. Conventionally, the additional structure portion is formed by insert molding, in which a main body portion of a fiber-reinforced resin is fixed in a mold and a thermoplastic resin is injected thereinto.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2011-165206
Disclosure of Invention
Problems to be solved by the invention
However, in the case of the above-described insert molding, since the resin impregnated into the fiber-reinforced resin of the main body is usually a thermosetting resin and the resin of the additional structural part is a thermoplastic resin, the resins of different types of materials are bonded to each other, and the bonding strength is lowered. In addition, when insert molding is performed, since a thermoplastic resin that has been heated to 200 ℃ or higher and melted is injected under high pressure, deformation and strain due to thermal shrinkage are easily generated in the product after insert molding. As a result, the yield and quality of the fiber-reinforced resin product are reduced, and as a result, the product price is increased.
The present invention has been made in view of the above circumstances, and an object thereof is to provide: a method for producing a fiber-reinforced resin structure, a system for producing a fiber-reinforced resin structure, and a fiber-reinforced resin structure, which can improve the bonding strength between a main body portion and an additional structure portion of a fiber-reinforced resin in the fiber-reinforced resin structure and reduce the occurrence of deformation and strain due to thermal shrinkage in conventional insert molding.
Means for solving the problems
As a result of intensive studies, the inventors of the present invention have found that the above problems can be solved by filling a groove of a mold with a thermosetting resin to be an additional structure to form a semi-cured additional structure in which the thermosetting resin is in a semi-cured state, forming a semi-cured main body in which the thermosetting resin of a fiber-reinforced resin is in a semi-cured state, pressing and heating the semi-cured additional structure against the semi-cured main body to cure the thermosetting resins of the semi-cured additional structure and the semi-cured main body, and bonding the additional structure to the main body.
That is, the present invention includes the following aspects.
(1) A method for producing a fiber-reinforced resin structure, the fiber-reinforced resin structure comprising: having a main body portion of a fiber-reinforced resin containing a thermosetting resin and an additional structural portion formed on a surface of the main body portion,
the manufacturing method comprises the following steps:
a step of forming a semi-cured additional structure portion in which a thermosetting resin is in a semi-cured state by filling the thermosetting resin into a groove of a mold formed corresponding to the shape of the additional structure portion;
a step of forming a semi-cured main body part in which a thermosetting resin of a fiber-reinforced resin is in a semi-cured state;
pressing and heating the semi-cured additional structure part and the semi-cured main body part in the groove of the mold, so as to cure the thermosetting resin of the semi-cured additional structure part and the semi-cured main body part, and bonding the additional structure part and the main body part; and
and a step of separating the mold from the additional structure portion.
(2) The method for producing a fiber-reinforced resin structure according to (1), wherein the step of filling the groove of the mold with the thermosetting resin is performed by discharging the thermosetting resin from a nozzle into the groove of the mold.
(3) The method for producing a fiber-reinforced resin structure according to (1) or (2), wherein the step of forming the semi-cured main body portion is performed by: a plate-like body is formed by combining prepregs of a plurality of fiber-reinforced resins, and both surfaces of the plate-like body are sandwiched by prepreg sheets (prepreg sheets) of fiber-reinforced resin containing thermosetting resin.
(4) The method of manufacturing a fiber-reinforced resin structure according to item (3), wherein in the step of forming the semi-cured main body, the plate-like body is formed by filling the opening of the prepreg of the first fiber-reinforced resin with the prepreg of the second fiber-reinforced resin.
(5) The method of manufacturing a fiber-reinforced resin structure according to (4), wherein the first fiber-reinforced resin is CFRP and the second fiber-reinforced resin is a fiber-reinforced resin made of a dielectric material.
(6) The method for producing a fiber-reinforced resin structure according to (1) or (2), wherein the step of forming the semi-cured main body portion is performed by: a plate-like body containing a foaming resin is formed, and both surfaces of the plate-like body are sandwiched by prepreg sheets of a fiber-reinforced resin containing a thermosetting resin.
(7) The method for producing a fiber-reinforced resin structure according to item (6), wherein the foamed resin of the plate-like body is foamed after the prepreg sheet is sandwiched therebetween.
(8) The method for producing a fiber-reinforced resin structure according to item (6), wherein the foamed resin of the plate-like body is foamed before the prepreg sheet is sandwiched therebetween.
(9) The method for producing a fiber-reinforced resin structure according to any one of (6) to (8), further comprising a step of forming a step in the semi-cured main body portion.
(10) The method of manufacturing a fiber-reinforced resin structure according to any one of (6) to (9), further comprising a step of adjusting a thickness of the semi-cured body.
(11) The method for producing a fiber-reinforced resin structure according to item (10), wherein a thickness of the semi-cured body portion is adjusted to 1mm or less.
(12) The method for producing a fiber-reinforced resin structure according to any one of (6) to (11), wherein the plate-like body contains a thermosetting resin.
(13) The method for manufacturing a fiber-reinforced resin structure according to any one of (1) to (12), wherein the semi-cured main body is press-molded into a desired shape in the step of bonding the additional structural part and the main body.
(14) The method for manufacturing a fiber-reinforced resin structure according to any one of (1) to (12), wherein the step of bonding the additional structural part and the main body part is performed by press molding in which the semi-cured additional structural part of the mold is pressed against the semi-cured main body part and pressure-bonded.
(15) The method for manufacturing a fiber reinforced resin structure according to any one of (1) to (12), wherein the step of bonding the additional structural part and the main body part is performed by autoclave molding or vacuum bag molding in which the semi-cured additional structural part and the semi-cured main body part of the mold are pressed and pressed by evacuation.
(16) The method for manufacturing a fiber-reinforced resin structure according to (1) or (2), wherein the step of forming the semi-cured main body and the step of bonding the additional structural part to the main body are performed by RTM molding or VaRTM molding.
(17) A method for producing a fiber-reinforced resin structure, the fiber-reinforced resin structure comprising: having a main body portion of a fiber-reinforced resin containing a thermosetting resin and an additional structural portion formed on a surface of the main body portion,
the manufacturing method comprises the following steps:
a step of forming an additional structure part by filling a thermosetting resin into a groove of a mold formed in correspondence with the shape of the additional structure part and curing the thermosetting resin;
a step of forming a semi-cured main body part in which a thermosetting resin of a fiber-reinforced resin is in a semi-cured state;
pressing and heating the additional structure part and the semi-solidified main body part in the groove of the mold to solidify the thermosetting resin of the semi-solidified main body part and bond the additional structure part and the main body part; and
and a step of separating the mold from the additional structure portion.
(18) A method for producing a fiber-reinforced resin structure, the fiber-reinforced resin structure comprising: having a main body portion of a fiber-reinforced resin containing a thermosetting resin and an additional structural portion formed on a surface of the main body portion,
the manufacturing method comprises the following steps:
a step of forming an additional structure part by filling a thermosetting resin into a groove of a mold formed in correspondence with the shape of the additional structure part and curing the thermosetting resin;
heating a 1 st prepreg sheet containing a fiber-reinforced thermosetting resin in a state of being in contact with the additional structure portion to cure the thermosetting resin of the 1 st prepreg sheet, thereby bonding the 1 st prepreg sheet to the additional structure portion;
a step of laminating and bonding a 2 nd prepreg sheet containing a fiber-reinforced resin of a thermosetting resin and a sheet containing an unfoamed foamed resin;
a step of forming a plate-like body by foaming the foamed resin of the sheet by heating and simultaneously bonding the plate-like body to the 1 st prepreg sheet, and bonding the plate-like body and the additional structure portion to each other, the main body portion being formed of the plate-like body and the 1 st and 2 nd prepreg sheets bonded to both surfaces of the plate-like body; and
and a step of separating the mold from the additional structure portion.
(19) A system for manufacturing a fiber reinforced resin structure, the fiber reinforced resin structure comprising: having a main body portion of a fiber-reinforced resin containing a thermosetting resin and an additional structural portion formed on a surface of the main body portion,
the manufacturing system fills thermosetting resin into a groove of a mold formed corresponding to the shape of an additional structure part, forms a semi-solidified additional structure part in which the thermosetting resin is in a semi-solidified state, forms a semi-solidified main body part in which the thermosetting resin of a fiber reinforced resin is in a semi-solidified state, presses and heats the semi-solidified additional structure part and the semi-solidified main body part in the groove of the mold, solidifies the thermosetting resin of the semi-solidified additional structure part and the semi-solidified main body part to bond the additional structure part and the main body part, and detaches the mold from the additional structure part.
(20) A fiber reinforced resin structure having: a main body portion formed of a fiber-reinforced resin containing a thermosetting resin; and an additional structural part made of thermosetting resin and provided on the surface of the main body part,
the main body part includes: a plate-like body formed by combining a plurality of types of fiber-reinforced resin sheets; and a fiber-reinforced resin sheet containing a thermosetting resin, which is provided on both surfaces of the plate-like body.
(21) The fiber-reinforced resin structure according to (20), wherein the plate-like body has: the resin sheet includes a first fiber-reinforced resin sheet having an opening, and a second fiber-reinforced resin sheet disposed in the opening.
(22) The fiber-reinforced resin structure according to (21), wherein the first fiber-reinforced resin sheet is a CFRP, and the second fiber-reinforced resin sheet is a fiber-reinforced resin made of a dielectric.
(23) A fiber reinforced resin structure having: a main body portion having a fiber-reinforced resin containing a thermosetting resin; and an additional structural part made of thermosetting resin and provided on the surface of the main body part,
the main body part includes: a plate-like body containing a foaming resin; and a fiber-reinforced resin sheet containing a thermosetting resin, which is provided on both surfaces of the plate-like body.
(24) The fiber-reinforced resin structure according to (23), wherein the plate-like body contains a thermoplastic resin.
(25) The fiber-reinforced resin structure according to (23) or (24), wherein the main body has a step.
(26) The fiber-reinforced resin structure according to any one of (23) to (25), wherein the thickness of the body portion is 1mm or less.
ADVANTAGEOUS EFFECTS OF INVENTION
The present invention can improve the bonding strength between the main body portion having the fiber-reinforced resin and the additional structure portion in the fiber-reinforced resin structure, and reduce the occurrence of deformation and strain due to thermal shrinkage in conventional insert molding.
Drawings
Fig. 1 is a plan view showing an example of a case of an electronic device in which a fiber-reinforced resin structure is used.
Fig. 2 is a schematic view showing a molding process of a semi-cured main body portion.
Fig. 3 is an explanatory view showing a 3-layer structure of the semi-cured main body portion.
FIG. 4 is a sectional view of the mold.
FIG. 5 is an explanatory view showing an example of filling a thermosetting resin into a groove of a mold.
FIG. 6 is an explanatory view showing an example of filling a thermosetting resin into a groove of a mold.
FIG. 7 is an explanatory view of a longitudinal section of the bonding apparatus.
FIG. 8 is a plan view of the joining device.
Fig. 9 is an explanatory diagram illustrating a state in which the semi-cured additional structural part of the mold is pressure-bonded to the semi-cured main body part in the bonding apparatus.
Fig. 10 is an explanatory view showing a state in which a semi-cured main body portion is press-molded in a bonding apparatus.
Fig. 11 is an explanatory view showing a state where the mold is disengaged from the additional structure portion in the joining device.
FIG. 12 is a diagram illustrating a 3-layer structure of a semi-cured main body part according to embodiment 2
Fig. 13 is an explanatory view showing a step of forming a semi-cured main body portion.
Fig. 14 is an explanatory view showing another step of forming a semi-cured main body portion.
Fig. 15 is an explanatory view showing an example of adjustment of the thickness of the semi-cured main body portion.
Fig. 16 is an explanatory diagram illustrating a step of forming a step in the semi-cured main body portion.
Fig. 17 is an explanatory view showing another step of forming a step in the semi-cured main body portion.
Fig. 18 is an explanatory view showing another step of forming a step in the semi-cured main body portion.
Fig. 19 is an explanatory view showing another step of forming a step in the semi-cured main body portion.
Fig. 20 is an explanatory view showing a bonding step of the main body portion and the additional configuration portion in embodiment 3.
FIG. 21 is an explanatory view showing another bonding step of the main body part and the additional configuration part.
Fig. 22 is an explanatory view showing a bonding step of the main body portion and the additional configuration portion in embodiment 4.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The same elements are denoted by the same reference numerals, and redundant description thereof is omitted. The positional relationship such as up, down, left, right, and the like is based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratio of the drawings is not limited by the illustrated ratio. The following embodiments are examples for illustrating the present invention, and the present invention is not limited to the embodiments.
The fiber-reinforced resin structure according to the present embodiment has the following structure: an additional structure part made of a thermosetting resin is added to a main body part having a fiber-reinforced resin containing a thermosetting resin. For example, as shown in fig. 1, when the fiber-reinforced resin structure 1 is a housing of a mobile device, the fiber-reinforced resin structure 1 includes a tray-shaped main body 10 and an additional structure 11 including a protrusion such as a rib or a protrusion formed on a surface of the main body 10.
In the present specification, the term "thermosetting resin" includes not only a single resin but also a composition containing a content such as a filler. As the filler, for example, inorganic fillers such as chopped glass filler, milled glass filler, carbon black, chopped carbon filler, milled carbon filler, silica filler, hollow glass filler, and the like can be used.
An example of a method for producing the fiber-reinforced resin structure 1 will be described below.
(embodiment 1)
Fig. 2 shows a process of forming a semi-cured main body portion 20 before curing to form the main body portion 10. First, prepregs (pregs) 30, 31 of 2 kinds of fiber-reinforced resins, for example, CFRP (carbon fiber-reinforced resin) as a first kind of fiber-reinforced resin and GFRP (glass fiber-reinforced resin) as a second kind of fiber-reinforced resin are prepared ((a) of fig. 2). Each of the prepregs 30 and 31 is impregnated with a thermosetting resin such as an epoxy resin that has not yet been cured (uncured (a stage) or semi-cured (B stage)).
Next, each prepreg 30, 31 is cut into a predetermined shape by a cutter to form each prepreg sheet ((b) of fig. 2). The prepreg 30 of, for example, CFRP is formed in a square shape having an opening portion 30a at a desired position, and the prepreg 31 of GFRP is cut to a size in accordance with the opening portion 30 a.
Next, the prepregs 30 and 31 are combined on a plane to form a plate-like body 40 having a square shape ((c) of fig. 2). At this time, the GFRP prepreg 31 is fitted into the opening 30a of the CFRP prepreg 30 to form the plate-like body 40.
Next, a prepreg sheet of a fiber-reinforced resin containing a thermosetting resin, for example, a microglass prepreg sheet 41 is bonded to both surfaces of the plate-like body 40 (fig. 2 (d)). As shown in fig. 3, the prepreg sheet 41 has a square shape having the same size as the plate-like body 40, and is bonded so as to cover the entire both surfaces of the plate-like body 40. The prepreg sheet 41 has a thickness of, for example, about 0.005mm to 0.5 mm. The thermosetting resin of the plate-like body 40 and the prepreg sheet 41 is maintained and controlled in a semi-cured (B-stage) state. In this manner, the semi-cured main body portion 20 including 3 layers (the plate-like body 40 and the prepreg sheet 41) of the thermosetting resin in the semi-cured state is formed. The semi-cured body 20 can be produced, for example, by using a body forming apparatus a, which supplies the prepregs 30 and 31, cuts the supplied prepregs 30 and 31, combines the cut prepregs 30 and 31 to form a plate-like body 40, and further bonds a prepreg sheet 41 to the plate-like body 40.
Next, a process of forming the semi-cured additional structural part 50 before the additional structural part 11 is formed by curing will be described. As shown in fig. 4, a mold 60 having a groove 61 corresponding to the shape of the additional structure portion 11 is formed. Then, the groove 61 of the mold 60 is filled with a thermosetting resin, such as an epoxy resin, which is the same as the semi-cured body portion 20 and is not yet cured. The filling may be performed, for example, by a resin filling apparatus 72 having a resin tank 70 and a nozzle 71 as shown in fig. 5. When the groove 61 of the mold 60 is wide in the lateral direction, the nozzle 71 is moved in the lateral direction while discharging the liquid thermosetting resin B from the nozzle 71, and the groove 61 is filled with the thermosetting resin. As shown in fig. 6, when the groove 61 of the mold 60 is deep, the nozzle 71 is inserted into the groove 61, and the groove 61 is filled with the thermosetting resin B by raising the nozzle 71 while discharging the liquid thermosetting resin B. Depending on the shape of the groove 61, the nozzle 71 may be filled with resin by a combination of horizontal movement and vertical movement. The filled thermosetting resin is maintained and controlled in a semi-cured (B-stage) state. In this manner, the semi-cured additional structural portion 50 in which the thermosetting resin is in a semi-cured state is formed in the mold 60.
Next, as shown in fig. 7, the semi-cured main body portion 20 and the semi-cured additional structural portion 50 of the mold 60 are provided in the bonding apparatus 80. For example, as shown in fig. 7 and 8, the bonding apparatus 80 includes a mounting table 90, a heater 91 built in the mounting table 90, and a side press 92 disposed around the mounting table 90. As shown in fig. 7, the semi-cured main body portion 20 is provided on and held by the mounting table 90. The semi-curing additional structure unit 50 is disposed above the mounting table 90 with the groove 61 of the mold 60 facing downward. Next, as shown in fig. 9, the mold 60 is lowered, and the semi-cured additional structural component 50 of the mold 60 is pressed against the semi-cured main body portion 20 on the mounting table 90, and pressure-bonding is performed by pressure molding. In this state, the semi-cured main body 20 and the semi-cured structural part 50 are heated to, for example, about 150 ℃ by, for example, a heater 91 built in the mounting table 90, and the respective semi-cured thermosetting resins are cured (in a C-stage state). In this way, the main body portion 10 is formed by curing the semi-cured main body portion 20, and the additional component portion 11 is formed by curing the semi-cured additional component portion 50, and at this time, the main body portion 10 and the additional component portion 11 are bonded and integrated.
Then, when the semi-cured main body portion 20 and the semi-cured additional structural component 50 are bonded by heating, as shown in fig. 10, the side surface press 92 is moved inward to press and mold the periphery of the semi-cured main body portion 20.
Then, as shown in fig. 11, the mold 60 is raised to separate the integrated additional structure part 11 from the main body part 10. In this way, the fiber reinforced resin structure 1 having the main body portion 10 and the additional structure portion 11 integrally is molded. That is, a fiber-reinforced resin structure 1 is manufactured, in which the fiber-reinforced resin structure 1 includes a main body portion 10 formed of a fiber-reinforced resin containing a thermosetting resin, and an additional structural portion 11 formed of a thermosetting resin provided on a surface of the main body portion 10, and the main body portion 10 includes a plate-like body 40 formed by combining 2 types of fiber-reinforced resin sheets 30 and 31, and prepreg sheets 41 of the fiber-reinforced resin containing a thermosetting resin provided on both surfaces of the plate-like body 40. Then, the fiber reinforced resin structure 1 is subjected to a deburring treatment, a coating treatment, and the like, thereby completing the process. In the present embodiment, the main body portion forming device a, the resin filling device 72, and the joining device 80 constitute a system for manufacturing a fiber-reinforced resin structure.
In the present embodiment, the semi-cured additional structural part 50 made of a semi-cured thermosetting resin is pressed against the semi-cured main body part 20 in which the thermosetting resin is in a semi-cured state and cured, and the additional structural part 50 and the main body part 10 are bonded to each other, so that the same material can be bonded to each other, and the bonding strength between the main body part 10 and the additional structural part 11 can be improved. Further, since the main body portion 10 and the additional structure portion 11 have similar compositions, the main body portion 10 and the additional structure portion 11 can be bonded at low temperature and low pressure without using insert molding, and therefore, the occurrence of deformation and strain due to thermal shrinkage in the conventional insert molding can be reduced. As a result, the yield and quality of the product of the fiber-reinforced resin structure 1 can be improved, and the product price of the fiber-reinforced resin structure 1 can be reduced.
In the step of filling the groove 61 of the mold 60 with the liquid thermosetting resin, the thermosetting resin is discharged from the nozzle 71 into the groove 61 of the mold 60, and therefore, the filling of the thermosetting resin can be performed easily and appropriately.
In the step of forming the semi-cured body 20, the prepreg sheets 30 and 31 of 2 kinds of fiber-reinforced resins are combined to form the plate-like body 40, and both surfaces thereof are sandwiched by the prepreg sheets 41 of fiber-reinforced resin containing thermosetting resin. Thus, different types of fiber-reinforced resins can be partially used in the fiber-reinforced resin structure 1, and the use of the fiber-reinforced resin structure 1 can be expanded. For example, as shown in fig. 1, the main body 10 is mainly formed of a CFRP sheet 30 having high strength, and a GFRP sheet 31 formed of a dielectric material which easily passes radio waves is used as a part of the main body 10, whereby the main body can be used as a case of a mobile device having a communication function. In this case, a lightweight and thin housing of the mobile device can be realized at low cost. The fiber-reinforced resin formed of a dielectric is not limited to GFRP, and other organic fibers such as polyester, inorganic fibers, and the like may be used.
In the step of forming the semi-cured body portion 20, the opening 31a of the prepreg 30 of the first fiber reinforced resin (CFRP) is filled with the prepreg 31 of the second fiber reinforced resin (GFRP), thereby forming the plate-like body 40. This enables the body 10 formed of a plurality of fiber-reinforced resins to be easily manufactured.
Since the semi-cured main body portion 20 is press-molded into a desired shape in the step of bonding the additional structure portion 11 to the main body portion 10, a step of molding the entire shape of the semi-cured main body portion 20 is not required separately, and the time required for manufacturing the fiber reinforced resin structure 1 can be reduced.
(embodiment 2)
In the step of forming the semi-cured body portion 20 described in embodiment 1, the prepreg sheets 30 and 31 of 2 kinds of fiber-reinforced resins are combined to form the plate-like body 40, and both surfaces thereof are sandwiched by the prepreg sheets 41 of the fiber-reinforced resin containing a thermosetting resin, but as shown in fig. 12, the plate-like body 100 containing a foamed resin may be formed, and both surfaces thereof may be sandwiched by the prepreg sheets 41 of the fiber-reinforced resin containing a thermosetting resin. That is, the main body 10 formed by curing the semi-cured main body 20 may include the plate-shaped body 100 containing the foamed resin and the sheet 41 containing the fiber-reinforced resin of the thermosetting resin provided on both surfaces of the plate-shaped body 100. The foamed resin here means a resin in which a large amount of a foam is mixed in the resin. As the foam, for example, a spherical body of acrylic or the like which is foamed by heating can be used, and as the resin containing the foam, for example, a thermosetting resin such as an epoxy resin can be used.
In the process of forming the semi-cured body portion 20, for example, as shown in fig. 13, a plate-like body 100 is formed by foaming a foaming resin by heating, and then prepreg sheets 41 are bonded to both surfaces of the plate-like body 100.
In another process of forming the semi-cured body portion 20, as shown in fig. 14, an unfoamed foamed resin sheet 101 is sandwiched between 2 prepreg sheets 41, and then the foamed resin is foamed by heating and cured to form a plate-like body 100. In this case, the prepreg sheet 41 is bonded to the plate-like body 100 when the foaming resin is foamed.
The plate-like body 100 containing a foamed resin is excellent in workability because the foam is compressively deformed. Therefore, for example, the thickness of the semi-cured main body 20 (main body 10) having a three-layer structure formed by the plate-like body 100 and the prepreg sheet 41 can be adjusted. In this case, the thickness of the semi-cured body 20 may be adjusted to 1mm or less. The thickness can be adjusted, for example, in the following manner: when the semi-cured main body portion 20 and the semi-cured additional structural portion 50 shown in fig. 9 are joined, the compressive force between the semi-cured additional structural portion 50 of the mold 60 and the semi-cured main body portion 20 of the mounting table 90 is adjusted. In addition, the thickness can be adjusted by: as shown in fig. 15, the unfoamed foamed resin sheet 101 is sandwiched between prepreg sheets 41, and the foamed resin sheet 101 and the prepreg sheet 41 are arranged between sandwiching members 110 at a desired interval (an interval corresponding to the thickness of the final semi-cured main body portion 20), and the foamed resin is foamed by heating in this state. At this time, the foaming (expansion) of the foaming resin is restricted by the clips 110, and the thickness of the semi-cured main body portion 20 is equal to the interval of 2 clips 110. Alternatively, the foamed plate-like body 100 may be pressed to a predetermined thickness and then sandwiched between prepreg sheets 41. By the above example, the semi-cured main body 20 (main body 10) which is very thin and light and 1mm or less can be formed, and therefore, the fiber reinforced resin structure 1 which is light and has strength can be realized.
Further, due to the excellent workability of the plate-like body 100, a step can be formed in the semi-cured main body portion 20 (main body portion 10). The step 130 can be formed by: for example, as shown in fig. 16, when foaming is performed, a height difference 120 having a desired shape, for example, a concave shape, is formed in the plate-like body 100, and the plate-like body 100 is press-processed together with the prepreg sheet 41. In addition, the step 130 may be formed by: as shown in fig. 17, the foamed flat plate-like body 100 is pressed together with the prepreg sheet 41 by a press having a convex portion. Further, it can also be performed by: as shown in fig. 18, the unfoamed foamed resin sheet 101 is sandwiched between the prepreg sheets 41, and the foamed resin sheet 101 and the prepreg sheet 41 are placed between the sandwiching members 110 having the convex portions at a desired interval (an interval corresponding to the thickness of the final semi-cured body portion 20), and the foamed resin is foamed by heating in this state. Further, it can also be performed by: as shown in fig. 19, a recessed level difference 140 is formed in advance in one prepreg sheet 41, and the prepreg sheet 41 having the level difference 140, another flat plate-shaped prepreg sheet 41, and the plate-shaped body 100 are placed between the holders 110 at a desired interval (interval corresponding to the thickness of the final semi-cured body portion 20), and in this state, the foamed resin is foamed by heating. In the above example, even a thin semi-cured body portion 20 of 1mm or less can form a semi-cured body portion 20 having a desired step that can be applied to, for example, a battery housing portion. Even in the thin semi-cured main body portion 20 having a thickness of 1mm or less, a step having a thickness variation rate of 50% or more can be formed. Therefore, the fiber-reinforced resin structure 1 which is lightweight and strong and has various shapes can be realized.
The thickness of the semi-cured body portion 20 and the height difference shape of the semi-cured body portion 20 adjusted in the above example are not limited to the above example. The structure and manufacturing process of the fiber-reinforced resin structure 1 not specifically described in embodiment 2 are the same as those in embodiment 1, for example.
(embodiment 3)
In embodiment 2 described above, the semi-cured additional structural part and the semi-cured main body part are bonded by heating and curing them, but the semi-cured additional structural part may be cured in advance, and the cured additional structural part and the semi-cured main body part may be heated and cured and the semi-cured main body part may be bonded. In this case, as shown in fig. 20, for example, a thermosetting resin is filled in a groove 61 of a mold 60 formed in accordance with the shape of the additional structure part 11, and the thermosetting resin is cured by heating to form the additional structure part 11. In addition, the semi-cured main body portion 20 is formed in a semi-cured state of a thermosetting resin forming the fiber reinforced resin. The semi-cured main body portion 20 may be formed, for example, as follows: as in embodiment 2, a plate-like body 100 containing a foamed resin is formed, and both surfaces thereof are sandwiched by prepreg sheets 41 containing a fiber-reinforced resin containing a thermosetting resin. Note that the semi-cured main body portion 20 may also be formed by: as in embodiment 1, a plate-like body 40 is formed by combining prepregs of a plurality of fiber-reinforced resins, and both surfaces thereof are sandwiched by prepreg sheets 41 of a fiber-reinforced resin containing a thermosetting resin. Then, the semi-cured body 20 is placed on, for example, a placing table 90 of the bonding apparatus 80.
Next, the additional structure 11 in the groove 61 of the mold 60 is pressed against the prepreg main body 20 and heated, the thermosetting resin of the prepreg sheet 41 of the prepreg main body 20 is cured, and the additional structure 11 is bonded to the main body 10. At this time, the thickness of the main body 10 can be adjusted by adjusting the distance between the die 60 and the mounting table 90. Then, the mold 60 is removed from the additional structure portion 11, and the fiber reinforced resin structure 1 is obtained.
In the above example, as shown in fig. 21, the three-layer structure of the unfoamed foamed resin sheet 101 and the 2 prepreg sheets 41 on both surfaces thereof is placed on the mounting table 90 in advance, and the foamed resin is foamed by heating the three-layer structure, whereby the main body portion 10 and the additional structure portion 11 having the three-layer structure can be bonded to each other. In this case, for example, the distance between the mold 60 and the mounting table 90 is adjusted to a desired distance (distance corresponding to the thickness of the final body 10), and the foamed resin is foamed by heating in this state. Thereby, the foamed resin sheet 101 is foamed and expanded, the prepreg sheet 41 on the upper side is brought into contact with the additional structure portion 11, and the thermosetting resin of the prepreg sheet 41 is cured, so that the main body portion 10 and the additional structure portion 11 are bonded.
(embodiment 4)
In embodiment 3, the main body 10 having a three-layer structure is integrally formed, but the three-layer structure of the main body 10 may be separated and the additional structure 11 and the 1 st prepreg sheet 41a may be bonded in advance. In this case, for example, as shown in fig. 22, a groove 61 of a mold 60 formed in accordance with the shape of the additional structure portion 11 is filled with a thermosetting resin, and the thermosetting resin is cured by heating to form the additional structure portion 11. Next, the 1 st prepreg sheet 41a of fiber-reinforced resin containing thermosetting resin is brought into contact with the additional structure 11, and heated in this state to cure the thermosetting resin of the 1 st prepreg sheet 41a, thereby bonding the 1 st prepreg sheet 41a to the additional structure 11. On the other hand, the 2 nd prepreg sheet 41b containing a fiber-reinforced resin of a thermosetting resin and the foamed resin sheet 101 containing an unfoamed foamed resin are placed on the placing table 90 in a state where they are overlapped and bonded (two-layer structure). Next, the foamed resin of the foamed resin sheet 101 is foamed by heating, and the plate-like body 100 is formed. At this time, for example, the distance between the die 60 and the mounting table 90 is adjusted to a desired distance (distance corresponding to the thickness of the final body portion 10), and the plate-like body 100 is expanded and bonded to the upper 1 st prepreg sheet 41 a. As a result, the main body 10 formed of the plate-like body 100 and the 1 st and 2 nd prepreg sheets 41a and 41b bonded to both surfaces thereof is bonded to the additional structural part 11. Finally, the mold 60 is removed from the additional structure part 11, and the fiber reinforced resin structure 1 is obtained.
The preferred embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the above examples. It is apparent that those skilled in the art can conceive various modifications and variations within the scope of the concept described in the claims, and it is to be understood that these modifications and variations also fall within the technical scope of the present invention.
For example, although the main body 10 is made of 2 kinds of fiber-reinforced resins in the above embodiment, the present invention is not limited to 2 kinds of fiber-reinforced resins, and may be applied to a case where the main body is made of 1 kind, 3 kinds, or more of fiber-reinforced resins. The type of the fiber-reinforced resin is not limited to CFRP and GFRP, and other fiber-reinforced resins using organic or inorganic fibers such as quartz, polyester, boron, aramid, Kevlar, polyethylene, parylene (Zylon), and polyimide can be used.
In the above embodiment, the semi-cured body 20 is press-molded into a desired shape in the step of bonding the additional structural part 11 to the body 10, but the press-molding may be performed before or after the step of bonding the additional structural part 11 to the body 10.
In the step of forming the semi-cured body 20, the prepreg sheets 30 and 31 of 2 kinds of fiber-reinforced resins are combined to form the plate-like body 40, and both surfaces thereof are sandwiched by the prepreg sheets 41, but the semi-cured body 20 in which the thermosetting resin of the fiber-reinforced resin is in a semi-cured state may be formed by another method. When the semi-curing is not necessary, the semi-curing may not be performed.
The thermosetting resin contained in the fiber-reinforced resin of the main body 10 and the thermosetting resin of the additional structural part 11 may be the same resin, but may be different resins, as long as they are thermosetting resins. The types of thermosetting resins for the main body portion 10 and the additional structure portion 11 are not particularly limited, and resins such as phenol resin, urea resin, melamine resin, unsaturated polyester resin, silicone resin, urethane resin, and bismaleimide resin can be used.
In the above embodiment, the step of filling the groove 61 of the mold 60 with the liquid thermosetting resin is performed by discharging the thermosetting resin from the nozzle 71 into the groove 61 of the mold 60, but may be performed by another method. For example, vacuum casting, resin injection molding, RTM, VaRTM, and the like can be used.
In the above embodiment, the step of bonding the additional structural part 11 and the main body part 10 is performed by press molding (in the press molding, the semi-cured additional structural part 50 of the mold 60 is pressed against the semi-cured main body part 20 to be bonded), but the present invention also includes a case where bonding is performed by a method other than press molding. For example, the present invention also includes a case where ordinary autoclave molding or vacuum bag molding (in which the semi-cured additional structural component 50 and the semi-cured main body 20 of the mold 60 are pressed together by evacuation in a vacuum bag) is used.
In the present invention, the step of forming the semi-cured body 20 in which the thermosetting resin of the fiber-reinforced resin is in a semi-cured state and the step of bonding the additional structure 11 and the body 10 by pressing and heating the semi-cured additional structure 50 in the groove 61 of the mold 60 and the semi-cured body 20 to cure the thermosetting resin of the semi-cured additional structure 50 and the semi-cured body 20 include the case of performing RTM molding, VaRTM molding, or the like of these steps at the same time. That is, in the RTM molding, the semi-cured additional structure 50 of the mold 60 is overlapped with the reinforcing fiber (no resin), and pressure is applied to flow the thermosetting resin into the reinforcing fiber, thereby forming the semi-cured main body 20 in a semi-cured state, and at the same time, the semi-cured additional structure 50 of the mold 60 and the semi-cured main body 20 are pressed against each other, and the additional structure 11 and the main body 10 are bonded. In VaRTM molding, the semi-cured additional structural component 50 of the mold 60 is overlapped with the reinforcing fiber (no resin), and vacuum is applied to flow the thermosetting resin into the reinforcing fiber, so that the semi-cured main body 20 in a semi-cured state is formed, and the semi-cured additional structural component 50 of the mold 60 and the semi-cured main body 20 are pressed against each other, and the additional structural component 11 and the main body 10 are bonded to each other.
In the case of forming the semi-cured main body 20 made of a plurality of types of fiber-reinforced resins (for example, 2 types of fiber-reinforced resins, such as CFRP and GFRP) in the above-described RTM molding and VaRTM molding, for example, dry cloths (dry cloths) (reinforcing fibers not impregnated with resin) of CFRP and GFRP are cut into arbitrary shapes, and these dry cloth pieces are combined with each other on the same plane to form a planar shape, and both surfaces thereof are sandwiched by other planar dry cloths. Then, the semi-curing additional structural part 50 of the mold 60 is provided on the dry cloth that has become 3 layers, and the thermosetting resin is poured into the dry cloth while applying pressure or vacuum suction.
In the above-described embodiment, the case used for electronic devices such as computers and mobile phones is shown as the fiber-reinforced resin structure 1, but the present invention is also applicable to all fiber-reinforced resin structures for vehicles, daily necessities, home electric appliances, industrial machines, and the like. The main body 10 is not limited to a tray shape, and the additional structure 11 is not limited to a protrusion such as a rib or a projection.
The manufacturing system of the fiber reinforced resin structure is not limited to the configuration of the above embodiment.
For reference, a fiber reinforced resin structure of a three-layer structure having: a plate-like body having a thermosetting resin containing a foaming resin; and a fiber-reinforced resin sheet containing a thermosetting resin, which is provided on both surfaces of the plate-like body. By the above technique, a fiber reinforced resin structure which is very thin and light and has strength can be realized. The fiber reinforced resin structure may have a step. The thickness of the fiber-reinforced resin structure may be 1mm or less.
Industrial applicability
The present invention is useful in improving the adhesion strength between a main body portion having a fiber-reinforced resin in a fiber-reinforced resin structure and an additional structure portion added to the main body portion, and reducing the occurrence of deformation and strain due to thermal shrinkage in conventional insert molding.
Description of the reference numerals
1 fiber-reinforced resin structure
10 main body part
11 additional structure part
20 semi-cured main body part
30. 31 prepreg
40 plate-shaped body
41 prepreg sheet
50 semi-solidified additional structure part
60 mould
61 groove
71 spray nozzle
B thermosetting resin
Claims (26)
1. A method for producing a fiber-reinforced resin structure,
the fiber-reinforced resin structure has: having a main body portion of a fiber-reinforced resin containing a thermosetting resin, and an additional structural portion formed on a surface of the main body portion,
the manufacturing method comprises the following steps:
a step of forming a semi-cured additional structure portion in which a thermosetting resin is in a semi-cured state by filling the thermosetting resin into a groove of a mold formed corresponding to the shape of the additional structure portion;
a step of forming a semi-cured main body part in which a thermosetting resin of a fiber-reinforced resin is in a semi-cured state;
pressing and heating the semi-solidified additional structure part and the semi-solidified main body part in the groove of the die, solidifying the thermosetting resin of the semi-solidified additional structure part and the semi-solidified main body part, and bonding the additional structure part and the main body part; and
and a step of detaching the mold from the additional structure portion.
2. The method of manufacturing a fiber-reinforced resin structure according to claim 1, wherein the step of filling the groove of the mold with the thermosetting resin is performed by discharging the thermosetting resin from a nozzle into the groove of the mold.
3. The method of manufacturing a fiber reinforced resin structure according to claim 1 or 2, wherein the step of forming the semi-cured main body portion is performed by: a plate-like body is formed by combining prepregs of a plurality of fiber-reinforced resins, and both surfaces of the plate-like body are sandwiched by prepreg sheets of a fiber-reinforced resin containing a thermosetting resin.
4. The method of manufacturing a fiber reinforced resin structure according to claim 3, wherein in the step of forming the semi-cured main body portion, a plate-like body is formed by filling a prepreg of a second fiber reinforced resin into an opening portion of a prepreg of a first fiber reinforced resin.
5. The method of manufacturing a fiber reinforced resin structure according to claim 4,
the first fiber reinforced resin is CFRP,
the second fiber-reinforced resin is a fiber-reinforced resin formed of a dielectric.
6. The method of manufacturing a fiber reinforced resin structure according to claim 1 or 2, wherein the step of forming the semi-cured main body portion is performed by: a plate-like body containing a foaming resin is formed, and both surfaces of the plate-like body are sandwiched by prepreg sheets of a fiber-reinforced resin containing a thermosetting resin.
7. The method of manufacturing a fiber-reinforced resin structure according to claim 6, wherein the foamed resin of the plate-like body is foamed after the prepreg sheet is sandwiched therebetween.
8. The method of manufacturing a fiber-reinforced resin structure according to claim 6, wherein the foamed resin of the plate-like body is foamed before the prepreg sheet is sandwiched.
9. The method of manufacturing a fiber-reinforced resin structure according to claim 6, further comprising a step of forming a step in the semi-cured main body portion.
10. The method of manufacturing a fiber reinforced resin structure according to claim 6, further comprising a step of adjusting a thickness of the semi-cured body portion.
11. The method of manufacturing a fiber-reinforced resin structure according to claim 10, wherein a thickness of the semi-cured body portion is adjusted to 1mm or less.
12. The method of manufacturing a fiber-reinforced resin structure according to claim 6, wherein the plate-like body contains a thermosetting resin.
13. The method of manufacturing a fiber-reinforced resin structure according to claim 1 or 2, wherein the semi-cured main body portion is press-molded into a desired shape in the step of bonding the additional structural portion and the main body portion.
14. The method of manufacturing a fiber reinforced resin structure according to claim 1 or 2, wherein the step of bonding the additional structural part and the main body part is performed by press molding in which the semi-cured additional structural part of the mold is pressed against the semi-cured main body part and pressure-bonded.
15. The method of manufacturing a fiber reinforced resin structure according to claim 1 or 2, wherein the step of bonding the additional structural part and the main body part is performed by autoclave molding or vacuum bag molding in which the semi-cured additional structural part and the semi-cured main body part of the mold are pressed and pressed by evacuation.
16. The method of manufacturing a fiber-reinforced resin structure according to claim 1 or 2, wherein the step of forming the semi-cured main body portion and the step of bonding the additional structural portion to the main body portion are performed by RTM molding or VaRTM molding.
17. A method for producing a fiber-reinforced resin structure,
the fiber-reinforced resin structure has: having a main body portion of a fiber-reinforced resin containing a thermosetting resin, and an additional structural portion formed on a surface of the main body portion,
the manufacturing method comprises the following steps:
a step of forming an additional structure part by filling a thermosetting resin into a groove of a mold formed in correspondence with the shape of the additional structure part and curing the thermosetting resin;
a step of forming a semi-cured main body part in which a thermosetting resin of a fiber-reinforced resin is in a semi-cured state;
pressing and heating the additional structure part and the semi-solidified main body part in the groove of the mold, solidifying the thermosetting resin of the semi-solidified main body part, and bonding the additional structure part and the main body part; and
and a step of detaching the mold from the additional structure portion.
18. A method for producing a fiber-reinforced resin structure,
the fiber-reinforced resin structure has: having a main body portion of a fiber-reinforced resin containing a thermosetting resin, and an additional structural portion formed on a surface of the main body portion,
the manufacturing method comprises the following steps:
a step of forming an additional structure part by filling a thermosetting resin into a groove of a mold formed in correspondence with the shape of the additional structure part and curing the thermosetting resin;
heating a 1 st prepreg sheet containing a fiber-reinforced thermosetting resin in a state where the prepreg sheet is in contact with the additional structure portion, and curing the thermosetting resin of the 1 st prepreg sheet to bond the 1 st prepreg sheet and the additional structure portion;
a step of laminating and bonding a 2 nd prepreg sheet containing a fiber-reinforced resin of a thermosetting resin and a sheet containing an unfoamed foamed resin;
a step of forming a plate-like body by foaming the foamed resin of the sheet by heating, and simultaneously bonding the plate-like body to the 1 st prepreg sheet, thereby bonding the additional structure portion to a main body portion formed of the plate-like body and the 1 st and 2 nd prepreg sheets bonded to both surfaces thereof; and
and a step of detaching the mold from the additional structure portion.
19. A system for manufacturing a fiber-reinforced resin structure,
the fiber-reinforced resin structure has: having a main body portion of a fiber-reinforced resin containing a thermosetting resin, and an additional structural portion formed on a surface of the main body portion,
the manufacturing system fills thermosetting resin into a groove of a mold formed corresponding to the shape of an additional structure part, forms a semi-cured additional structure part of which the thermosetting resin is in a semi-cured state, forms a semi-cured main body part of which the thermosetting resin of fiber reinforced resin is in a semi-cured state, presses and heats the semi-cured additional structure part and the semi-cured main body part in the groove of the mold, so that the thermosetting resin of the semi-cured additional structure part and the semi-cured main body part is cured to bond the additional structure part and the main body part, and the mold is separated from the additional structure part.
20. A fiber reinforced resin structure having: a main body portion formed of a fiber-reinforced resin containing a thermosetting resin; and an additional structural portion formed of a thermosetting resin provided on a surface of the main body portion,
the main body portion has: a plate-like body formed by combining a plurality of types of fiber-reinforced resin sheets; and a fiber-reinforced resin sheet containing a thermosetting resin, which is provided on both surfaces of the plate-like body.
21. A fiber reinforced resin structure as set forth in claim 20, wherein said plate-like body has: the resin sheet includes a first fiber-reinforced resin sheet having an opening portion, and a second fiber-reinforced resin sheet disposed in the opening portion.
22. The fiber reinforced resin structure according to claim 21,
the first fiber-reinforced resin sheet is CFRP,
the second fiber-reinforced resin sheet is a fiber-reinforced resin formed of a dielectric.
23. A fiber reinforced resin structure having: a main body portion having a fiber-reinforced resin containing a thermosetting resin; and an additional structural portion formed of a thermosetting resin provided on a surface of the main body portion,
the main body portion has: a plate-like body containing a foaming resin; and a fiber-reinforced resin sheet containing a thermosetting resin, which is provided on both surfaces of the plate-like body.
24. The fiber reinforced resin structure of claim 23, wherein the plate-like body contains a thermoplastic resin.
25. The fiber reinforced resin structure of claim 23 or 24, wherein the main body portion has a step.
26. The fiber reinforced resin structure according to claim 23 or 24, wherein the thickness of the main body portion is 1mm or less.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2015-208949 | 2015-10-23 | ||
| JP2015208949 | 2015-10-23 | ||
| PCT/JP2016/069294 WO2017068812A1 (en) | 2015-10-23 | 2016-06-29 | Method for manufacturing fiber-reinforced resin structure, system for manufacturing fiber-reinforced resin structure, and fiber-reinforced resin structure |
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| CN108136685A CN108136685A (en) | 2018-06-08 |
| CN108136685B true CN108136685B (en) | 2020-05-12 |
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| JP (2) | JP6792313B2 (en) |
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| JP7093701B2 (en) * | 2018-08-31 | 2022-06-30 | 本田技研工業株式会社 | Fiber reinforced plastic molded product |
| JP7332323B2 (en) * | 2018-09-28 | 2023-08-23 | 株式会社槌屋 | fiber reinforced adhesive sheet |
| CN112008990B (en) * | 2020-08-14 | 2022-03-29 | 威海锦阳电子有限公司 | Method for processing magnetic drum of linear compressor |
| WO2023219157A1 (en) * | 2022-05-12 | 2023-11-16 | スーパーレジン工業株式会社 | Curable resin composition, cured product, prepreg, cured product of prepreg, laminated structure, curable resin composition production method, and cured product production method |
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| JPS5838123A (en) * | 1981-09-01 | 1983-03-05 | Mitsubishi Electric Corp | Molding method of frp product |
| JPS621529A (en) * | 1985-06-27 | 1987-01-07 | Honda Motor Co Ltd | Manufacture of laminated molded material made of synthetic resin and manufacturing device |
| CN101516589A (en) * | 2006-09-28 | 2009-08-26 | 东丽株式会社 | Process for producing composite prepreg base, layered base, and fiber-reinforced plastic |
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| JP2508714B2 (en) * | 1987-05-21 | 1996-06-19 | 大日本インキ化学工業株式会社 | Method for producing molded article having gel coat layer |
| JPH07165958A (en) * | 1993-12-15 | 1995-06-27 | Matsushita Electric Works Ltd | Production of unsaturated polyester resin foamed molded product |
| JP3012866U (en) * | 1994-12-22 | 1995-06-27 | 櫻護謨株式会社 | Dome structure |
| JP2963070B2 (en) * | 1997-04-15 | 1999-10-12 | 株式会社谷口工業 | Manufacturing method of synthetic resin composite board |
| JP4001415B2 (en) * | 1998-02-02 | 2007-10-31 | 櫻護謨株式会社 | Manufacturing method of rib structure |
| JP2006517879A (en) * | 2003-01-24 | 2006-08-03 | ベック テクノロジー インコーポレーテッド | Composite molded product and method for producing composite molded product |
| JP2004249585A (en) * | 2003-02-20 | 2004-09-09 | Toray Ind Inc | Fiber-reinforced plastic molding and its production method |
| TWI353303B (en) * | 2004-09-07 | 2011-12-01 | Toray Industries | Sandwich structure and integrated molding using th |
| JP4558091B1 (en) * | 2009-10-29 | 2010-10-06 | 株式会社イノアックコーポレーション | Fiber-reinforced molded body and method for producing the same |
| JP5346888B2 (en) * | 2010-07-09 | 2013-11-20 | ヨシモトポール株式会社 | Feed tank |
| JP6820538B2 (en) * | 2013-12-25 | 2021-01-27 | パナソニックＩｐマネジメント株式会社 | Manufacturing method of panel members for electronic devices and panel members for electronic devices |
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| JPS5838123A (en) * | 1981-09-01 | 1983-03-05 | Mitsubishi Electric Corp | Molding method of frp product |
| JPS621529A (en) * | 1985-06-27 | 1987-01-07 | Honda Motor Co Ltd | Manufacture of laminated molded material made of synthetic resin and manufacturing device |
| CN101516589A (en) * | 2006-09-28 | 2009-08-26 | 东丽株式会社 | Process for producing composite prepreg base, layered base, and fiber-reinforced plastic |
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| CN108136685A (en) | 2018-06-08 |
| JP2021014125A (en) | 2021-02-12 |
| JP6792313B2 (en) | 2020-11-25 |
| WO2017068812A1 (en) | 2017-04-27 |
| JPWO2017068812A1 (en) | 2018-08-09 |
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