CN102990947A - Light resin transfer mold (LRTM) with flexible upper mold - Google Patents
Light resin transfer mold (LRTM) with flexible upper mold Download PDFInfo
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- CN102990947A CN102990947A CN2012105160826A CN201210516082A CN102990947A CN 102990947 A CN102990947 A CN 102990947A CN 2012105160826 A CN2012105160826 A CN 2012105160826A CN 201210516082 A CN201210516082 A CN 201210516082A CN 102990947 A CN102990947 A CN 102990947A
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Abstract
The invention discloses a light resin transfer mold (LRTM) with a flexible upper mold. The LRTM comprises an upper mold and a lower mold, wherein the lower mold is rigid; the upper mold is at least closed with the lower mold to form a flexible cavity part; the flexible part of the upper mold is a flexible enhanced silica gel plate; and the flexible enhanced silica gel plate comprises a flexible enhancement layer and a silica gel layer adhered to two side faces of the flexible enhancement layer. The LRTM with the flexible upper mold does not have reactive force on the atmosphere in a vacuum state and is easily vacuumized, the energy consumption can be reduced, no residual air and local gap are reserved in the cavity after vacuumizing, complete negative pressure can be applied to the product, the injection filling degree is guaranteed, the product quality is improved, the resin content of the product can be effectively controlled, the material consumption is saved, and the cost is saved; and meanwhile, the processing and forming of inner flanges, process skirts and other structures which cannot be realized by any conventional LRTM can be realized, the application range of the LRTM process is widened, and a foundation is laid for reducing the processing cost of the composite materials.
Description
Technical field
The present invention relates to a kind of injection mold, relate in particular to a kind of LRTM mould of flexible patrix.
Background technology
Injection mo(u)lding is that the injected plastics material that melts that is heated is injected mold cavity, after solidifying, obtain the process of formed products, generally be divided into matched moulds, injection moulding, pressurize curing and the several steps of the demoulding, be widely used in the moulding production of all kinds of composite products, and for the injection mo(u)lding of large-scale housing product such as fiberglass wind power cabin cover, usually adopt LRTM(lightweight resin transfer molding) processes, behind the matched moulds air in the mold cavity is extracted out, carry out application of vacuum, carry out again resin injection, can greatly improve efficient and the filling effect of resin injection.
The employed mould of existing LRTM technique is rigidity upper and lower mould structure, in forming process, after forming condition of negative pressure in the die cavity, mould is fully closed, but because mold is rigidity, can keep original form constant, if want die cavity to reach the certain vacuum degree, need to increase vacuum system power, energy consumption increases, and upper mould can't apply complete negative pressure to product, even there are residual air and a local gap, not only affect the compactedness of resin, and can't realize the effective control to final resin content, product quality can not be guaranteed.
Therefore, for addressing the above problem, need to be improved existing injection mold, be used for the large-scale products such as fiberglass wind power cabin cover, to reduce energy consumption, be guaranteed the injection fillers degree, be reduced final resin content, be improved the quality of products.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of LRTM mould of flexible patrix, be set to flexible upper die structure, under vacuum state to atmospheric pressure low-disturbance power, vacuumize easily processing, capable of reducing energy consumption, and also die cavity vacuumizes rear noresidue air and local gap, can apply complete negative pressure to product, guarantee the injection fillers degree, improve the quality of products, also can effectively control final resin content, economize on material, reduce cost.
The LRTM mould of flexible patrix of the present invention comprises counterdie and patrix; Described counterdie is rigidity; Described patrix is flexible with the part of counterdie matched moulds back wall forming cavity at least; Described patrix flexible portion is the flexible reinforced silica gel plate, and described flexible reinforced silica gel plate comprises the flexible reinforced layer and is bonded in the layer of silica gel of described flexible reinforced layer two sides.
Further, described counterdie is around the sealing of limit section for being used for being tightly connected with patrix of die cavity, and the described patrix part corresponding with sealing is half flexibility;
Further, described patrix half flexible portion is half flexible reinforced silica gel plate, described half flexible reinforced silica gel plate comprises the half flexible reinforced layer that is wholely set with patrix flexible portion flexible reinforced layer and extends the top layer that is bonded in half flexible reinforced layer respective surfaces by the layer of silica gel of flexible reinforced silica gel plate that described half flexible reinforced layer thickness is greater than the flexible reinforced layer;
Further, described flexible reinforced layer and half flexible reinforced layer are the glass screen cloth, and the glass screen cloth thickness that is used for the flexible reinforced layer is 2 ~ 5mm; The glass screen cloth thickness that is used for half flexible reinforced layer is 6 ~ 12mm;
Further, described layer of silica gel is that the molded silicon rubber dilution of viscosity between 5000 ~ 8000 centipoises adopts injection molding curing to form;
Further, described molded silicon rubber dilution is evenly mixed by the volume ratio of 1:10 by gasoline and molded silicon rubber and also adds in proportion curing agent and form;
Further, described patrix and counterdie are by the sealing of vacuum matched moulds, patrix limit section bottom surface is provided with inside and outside two annular sealing strips, counterdie one by one corresponding annular sealing strip is provided with for being sealed and matched with annular sealing strip and forms the annular seal groove of annular seal space, described counterdie limit section is provided with the matched moulds aspirating hole that at least one can be communicated with annular seal space, and described matched moulds aspirating hole vertically runs through counterdie limit section and is positioned at counterdie limit section bottom surface and is fixed with the matched moulds air extraction connector;
Further, described patrix flexible portion is provided with for being communicated with two aspirating holes that vacuum negative pressure device vacuumizes die cavity and the injection orifice that is used for injected plastics material is imported die cavity, described aspirating hole vertically run through the patrix flexible portion and one by one corresponding aspirating hole place between flexible reinforced layer and outside layer of silica gel, be embedded with vacuum adapter; Described injection orifice is by vertically being embedded in advance the mozzle between flexible reinforced layer and the outside layer of silica gel and being communicated in spraying into the hole and be arranged at the entrance hole that the mozzle middle part is used for being communicated in injection apparatus and forming of mozzle port and die cavity, and the entrance hole place is fixed with and passes the jet-sub for the connection injection apparatus that outside layer of silica gel arranges on the described mozzle;
Further, described mozzle is rigidity semi-circular section pipe, and described rigidity semi-circular section pipe is fastened on the setting of flexible reinforced layer.
The invention has the beneficial effects as follows: the LRTM mould of flexible patrix of the present invention, be set to flexible upper die structure, under vacuum state to atmospheric pressure low-disturbance power, vacuumize easily processing, capable of reducing energy consumption, and die cavity vacuumizes rear noresidue air and local gap, can apply complete negative pressure to product, guarantee the injection fillers degree, improve the quality of products, also can effectively control final resin content, economize on material, reduce cost, meanwhile, based on the flexibility of patrix, can also realize the inner flange that any LRTM mould in the past can't be realized, the isostructural machine-shaping of technique skirt-rim, expanded the scope of application of LRTM technique, for the processing cost that reduces composite products lays the first stone.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is front view of the present invention;
Fig. 2 is left view of the present invention;
Fig. 3 is top perspective view of the present invention;
Fig. 4 is face upwarding stereogram of the present invention;
Fig. 5 is A place cutaway view among Fig. 1.
The specific embodiment
Fig. 1 is front view of the present invention, and Fig. 2 is left view of the present invention, and Fig. 3 is top perspective view of the present invention, Fig. 4 is face upwarding stereogram of the present invention, Fig. 5 is A place cutaway view among Fig. 1, and as shown in the figure: the LRTM mould of the flexible patrix of present embodiment comprises patrix 1 and counterdie 2; Described counterdie 2 is rigidity; Described patrix 1 is flexible with the part of counterdie 2 matched moulds back wall forming cavities at least; Described patrix 1 flexible portion is the flexible reinforced silica gel plate, described flexible reinforced silica gel plate comprises flexible reinforced layer 3 and is bonded in the layer of silica gel 4 of described flexible reinforced layer 3 two sides, patrix 1 end face and counterdie 2 bottom surfaces are provided with the profile corresponding with product 11 respective surfaces, and but matched moulds is configured for the die cavity of product 11 moulding, flexible reinforced layer 3 is used for guaranteeing the tensile strength of patrix 1 flexible portion, can adopt fibrous material to make.
In the present embodiment, described counterdie 2 is around the sealing of limit section for being used for being tightly connected with patrix 1 of die cavity, and described patrix 1 part corresponding with sealing is half flexibility, has certain structural strength, is beneficial to counterdie 2 limit sections to be tightly connected.
In the present embodiment, described patrix 1 half flexible portions are half flexible reinforced silica gel plate, described half flexible reinforced silica gel plate comprises the half flexible reinforced layer 3 that is wholely set with patrix 1 flexible portion flexible reinforced layer 3 and the top layer that is bonded in half flexible reinforced layer, 3 respective surfaces by layer of silica gel 4 extensions of flexible reinforced silica gel plate, described half flexible reinforced layer, 3 thickness are greater than flexible reinforced layer 3, patrix 1 flexible portion and half flexible portion are wholely set and not only can form preferably overall tightness and tensile strength, and are convenient to processing and fabricating.
In the present embodiment, described flexible reinforced layer 3 and half flexible reinforced layer 3 are the glass screen cloth, and the glass screen cloth thickness that is used for flexible reinforced layer 3 is 2 ~ 5mm; The glass screen cloth thickness that is used for half flexible reinforced layer 3 is 6～12mm, the glass screen cloth that is used for half flexible reinforced layer 3 can be set up on the glass fiber net cloth basis of flexible reinforced layer 3 the glass fiber net cloth number of plies to reach desired thickness, and each layer glass screen cloth is knitted to one and then guarantees that patrix 1 half flexible portions have certain structural strength.
In the present embodiment, described layer of silica gel 4 forms for the molded silicon rubber dilution of viscosity between 5000 ~ 8000 centipoises adopts injection molding to solidify, and the patrix 1 after the moulding is rationally flexible, and not fragile.
In the present embodiment, described molded silicon rubber dilution is evenly mixed by the volume ratio of 1:10 by gasoline and molded silicon rubber and also adds in proportion curing agent and form, the mixture that curing agent and ratio thereof are specially ethyl orthosilicate and dibutyl tin laurate is added in the molded silicon rubber dilution in 2 ~ 3% ratios, silica gel is diluted as solvent with gasoline, can reduce its viscosity to claimed range, because gasoline is not participated in reaction and high volatility, can guarantee the original intensity of silica gel simultaneously.
In the present embodiment, described patrix 1 seals by the vacuum matched moulds with counterdie 2, patrix 1 limit section bottom surface is provided with inside and outside two annular sealing strips 5, counterdie 2 one by one corresponding annular sealing strip 5 is provided with for being sealed and matched with annular sealing strip 5 and forms the annular seal groove 6 of annular seal space, described counterdie 2 limit sections are provided with the matched moulds aspirating hole that at least one can be communicated with annular seal space, described matched moulds aspirating hole vertically runs through counterdie 2 limit sections and is positioned at counterdie 2 limit section bottom surfaces and is fixed with matched moulds air extraction connector 7, the vacuum matched moulds can effectively guarantee the die tightness energy, and matched moulds efficient is high, little to the mold damage, be beneficial to the prolongation die life, annular sealing strip 5 is adhesively fixed in patrix 1 limit section bottom surface, syndeton is stable, and good airproof performance is easy to process.
In the present embodiment, described patrix 1 flexible portion is provided with for being communicated with two aspirating holes that vacuum negative pressure device vacuumizes die cavity and the injection orifice that is used for injected plastics material is imported die cavity, described aspirating hole vertically run through patrix 1 flexible portion and one by one corresponding aspirating hole place between flexible reinforced layer 3 and outside layer of silica gel 4, be embedded with vacuum adapter 8; Described injection orifice is by vertically being embedded in advance the mozzle 9 between flexible reinforced layer 3 and the outside layer of silica gel 4 and being communicated in spraying into the hole and be arranged at the entrance hole that mozzle 9 middle parts are used for being communicated in injection apparatus and forming of mozzle 9 ports and die cavity, and the entrance hole place is fixed with and passes the jet-sub 10 for the connection injection apparatus that outside layer of silica gel 4 arranges on the described mozzle 9.
In the present embodiment, described mozzle 9 is fastened on flexible reinforced layer 3 and arranges for rigidity semi-circular section pipe, described rigidity semi-circular section pipe, and rigidity semi-circular section pipe can adopt steel pipe to be cut into vertically, and material source is wide, and is easy to process, and cost of manufacture is lower.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. the LRTM mould of a flexible patrix is characterized in that: comprise upper die and lower die; Described counterdie is rigidity; Described patrix is flexible with the part of counterdie matched moulds back wall forming cavity at least; Described patrix flexible portion is the flexible reinforced silica gel plate, and described flexible reinforced silica gel plate comprises the flexible reinforced layer and is bonded in the layer of silica gel of described flexible reinforced layer two sides.
2. the LRTM mould of flexible patrix according to claim 1 is characterized in that: described counterdie is around the sealing of limit section for being used for being tightly connected with patrix of die cavity, and the described patrix part corresponding with sealing is half flexibility.
3. the LRTM mould of flexible patrix according to claim 2, it is characterized in that: described patrix half flexible portion is half flexible reinforced silica gel plate, described half flexible reinforced silica gel plate comprises the half flexible reinforced layer that is wholely set with patrix flexible portion flexible reinforced layer and extends the top layer that is bonded in half flexible reinforced layer respective surfaces by the layer of silica gel of flexible reinforced silica gel plate that described half flexible reinforced layer thickness is greater than the flexible reinforced layer.
4. the LRTM mould of flexible patrix according to claim 3, it is characterized in that: described flexible reinforced layer and half flexible reinforced layer are the glass screen cloth, the glass screen cloth thickness that is used for the flexible reinforced layer is 2 ~ 5mm; The glass screen cloth thickness that is used for half flexible reinforced layer is 6～12mm.
5. the LRTM mould of flexible patrix according to claim 4 is characterized in that: described layer of silica gel is that the molded silicon rubber dilution of viscosity between 5000 ~ 8000 centipoises adopts injection molding to solidify to form.
6. the LRTM mould of flexible patrix according to claim 5 is characterized in that: described molded silicon rubber dilution is evenly mixed by the volume ratio of 1:10 by gasoline and molded silicon rubber and also adds in proportion curing agent and form.
7. the LRTM mould of flexible patrix according to claim 1, it is characterized in that: described patrix and counterdie are by the sealing of vacuum matched moulds, patrix limit section bottom surface is provided with inside and outside two annular sealing strips, counterdie one by one corresponding annular sealing strip is provided with for being sealed and matched with annular sealing strip and forms the annular seal groove of annular seal space, described counterdie limit section is provided with the matched moulds aspirating hole that at least one can be communicated with annular seal space, and described matched moulds aspirating hole vertically runs through counterdie limit section and is positioned at counterdie limit section bottom surface and is fixed with the matched moulds air extraction connector.
8. the LRTM mould of flexible patrix according to claim 1, it is characterized in that: described patrix flexible portion is provided with for being communicated with two aspirating holes that vacuum negative pressure device vacuumizes die cavity and the injection orifice that is used for injected plastics material is imported die cavity, described aspirating hole vertically run through the patrix flexible portion and one by one corresponding aspirating hole place between flexible reinforced layer and outside layer of silica gel, be embedded with vacuum adapter; Described injection orifice is by vertically being embedded in advance the mozzle between flexible reinforced layer and the outside layer of silica gel and being communicated in spraying into the hole and be arranged at the entrance hole that the mozzle middle part is used for being communicated in injection apparatus and forming of mozzle port and die cavity, and the entrance hole place is fixed with and passes the jet-sub for the connection injection apparatus that outside layer of silica gel arranges on the described mozzle.
9. the LRTM mould of flexible patrix according to claim 8 is characterized in that: described mozzle is rigidity semi-circular section pipe, and described rigidity semi-circular section pipe is fastened on the setting of flexible reinforced layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105160826A CN102990947A (en) | 2012-12-04 | 2012-12-04 | Light resin transfer mold (LRTM) with flexible upper mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105160826A CN102990947A (en) | 2012-12-04 | 2012-12-04 | Light resin transfer mold (LRTM) with flexible upper mold |
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| CN102990947A true CN102990947A (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105160826A Pending CN102990947A (en) | 2012-12-04 | 2012-12-04 | Light resin transfer mold (LRTM) with flexible upper mold |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108215249A (en) * | 2017-12-21 | 2018-06-29 | 吉林大学 | A kind of composite laminated plate makes mold |
| CN108582595A (en) * | 2017-12-26 | 2018-09-28 | 广州精益汽车空调有限公司 | A kind of motorbus air conditioner housing molding die and silica gel compression-moulding methods |
| CN109719971A (en) * | 2017-10-27 | 2019-05-07 | 株洲电力机车广缘科技有限责任公司 | A kind of mold and its upper male mould manufacturing method for vacuum infusion molding |
| CN112497582A (en) * | 2020-11-12 | 2021-03-16 | 山东格瑞德集团有限公司 | A novel silica gel mould for cabin cover production uses |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327456A (en) * | 1998-10-15 | 2001-12-19 | 托马斯·布彻尔 | Polyurethane material molded body, method for producing same and use thereof |
| US20090213570A1 (en) * | 2008-02-22 | 2009-08-27 | Jigon Kim | Backlight unit |
| JP4484818B2 (en) * | 2003-03-13 | 2010-06-16 | 東邦テナックス株式会社 | Resin transfer molding method |
| CN202137957U (en) * | 2011-07-25 | 2012-02-08 | 浙江联洋复合材料有限公司 | RTM (resin transfer molding) soft mould |
-
2012
- 2012-12-04 CN CN2012105160826A patent/CN102990947A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327456A (en) * | 1998-10-15 | 2001-12-19 | 托马斯·布彻尔 | Polyurethane material molded body, method for producing same and use thereof |
| JP4484818B2 (en) * | 2003-03-13 | 2010-06-16 | 東邦テナックス株式会社 | Resin transfer molding method |
| US20090213570A1 (en) * | 2008-02-22 | 2009-08-27 | Jigon Kim | Backlight unit |
| CN202137957U (en) * | 2011-07-25 | 2012-02-08 | 浙江联洋复合材料有限公司 | RTM (resin transfer molding) soft mould |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109719971A (en) * | 2017-10-27 | 2019-05-07 | 株洲电力机车广缘科技有限责任公司 | A kind of mold and its upper male mould manufacturing method for vacuum infusion molding |
| CN108215249A (en) * | 2017-12-21 | 2018-06-29 | 吉林大学 | A kind of composite laminated plate makes mold |
| CN108582595A (en) * | 2017-12-26 | 2018-09-28 | 广州精益汽车空调有限公司 | A kind of motorbus air conditioner housing molding die and silica gel compression-moulding methods |
| CN112497582A (en) * | 2020-11-12 | 2021-03-16 | 山东格瑞德集团有限公司 | A novel silica gel mould for cabin cover production uses |
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Application publication date: 20130327 |