TWM503993U - Injection mold for producing plastic object combined with fabric - Google Patents

Description

Injection mold for manufacturing plastic material combined with cloth

The present invention relates to an injection mold, and more particularly to an injection mold for manufacturing a plastic material incorporating a cloth.

Press, in order to improve the texture and aesthetics of the plastic case of electronic devices such as mobile phones or notebook computers, there is a need to bond the fabric to the plastic case. A conventional in-mold injection molding method comprising the steps of: (a) printing a pattern on a surface of a photographic fabric; (b) applying a glue to the other surface of the photographic fabric; (c) The photographic fabric is cut into a predetermined shape; (d) the photographic film of the coated adhesive is placed in an injection molding die, and the side of the photographic fabric having the pattern faces the inner wall of the mold to The veneer coated with the adhesive side ejects the plastic to obtain a finished plastic product incorporating the photographic fabric, and a surface of the finished plastic product has the pattern; and (e) the surface of the photographic fabric of the finished plastic product A hardened layer is formed. An embodiment similar to the conventional in-mold injection molding method has been disclosed in the patent application of the Republic of China Publication No. 200821127 "In-mold injection molding method and product thereof for the surface of the finished film".

However, since the conventional in-mold injection molding method is to cut the cloth, the cut fabric is placed in the molding die to perform the injection molding step. Therefore, the cloth must be accurately aligned after it enters the forming mold to ensure that the plastic is projected on the fabric at the desired position. Once the alignment is shifted, the product will be flawed and a defective product will be formed. Therefore, the conventional in-mold injection molding method has a low product yield and often causes waste of raw material cost; if the product yield is to be improved, it takes a lot of manpower and time cost, resulting in poor process efficiency.

Furthermore, in the conventional in-mold injection molding method, "cut fabric" and "shot plastic" are two separate steps, and there is a time-consuming and laborious "positioning cloth" step between the two steps. This conventional in-mold injection molding method has a problem of complicated steps; even if the operator improves the experience and familiarity of the "positioning fabric" step, the effect on improving the overall process efficiency is still quite limited.

In view of this, the conventional in-mold injection molding method does have a need for improvement.

The present invention provides an injection mold for manufacturing a plastic material combined with a cloth, which can cut the cloth after the plastic is injected to the cloth, so as to greatly reduce the influence of the alignment accuracy of the cloth in the cavity on the product yield. .

The present invention provides an injection mold for manufacturing a plastic material combined with a fabric. After the plastic is ejected to the fabric, the fabric can be cut directly in the injection mold to improve the cutting accuracy and simplify the process.

The injection mold for manufacturing a plastic material combined with a cloth comprises: a plurality of modules, the plurality of modules together form a cavity and a cloth passage, and the cloth passage communicates the cavity with the outside, the number The module is provided with a shooting port, a sipe and a receiving groove, the injection port is in communication with the cavity, the sipe is opposite to the receiving groove, the sipe and the receiving groove are located outside the cavity, and The sipe and the receiving groove are both connected to the cloth passage; and a cutter, the cutter is movably disposed in the sipe.

The plurality of modules form a male mold and a female mold. The injection opening is disposed in the male mold. The female mold is provided with a plurality of air suction passages, and each of the air suction passages communicates with the mold cavity.

The injection mold of the present invention may further comprise a heater connected to the cutter for heating the cutter.

Accordingly, the present invention is used to manufacture an injection mold that incorporates a plastic material of cloth. After the plastic is shot out to the fabric, the fabric is cut to greatly reduce the influence of the alignment accuracy of the fabric in the cavity on the product yield. Even if the operator has insufficient experience, it is not easy to lower the product due to the inability to accurately position the fabric. Yield. Therefore, this creation can improve product yield, save manpower and time costs, reduce production costs and improve process efficiency.

In addition, the creation is used to manufacture an injection mold that combines the plastic material of the fabric, and after the plastic is injected to the fabric, the fabric can be cut directly in the injection mold to improve the cutting accuracy and simplify the process, and improve the process. Product yield and process efficiency.

1‧‧‧ module

1a‧‧‧Male model

1b‧‧‧Female model

11‧‧‧ cavity

12‧‧‧ cloth passage

13‧‧‧Protruding

14‧‧‧ recessed

15‧‧‧ shot mouth

16‧‧‧Slot

17‧‧‧ socket

18‧‧‧ thimble

19‧‧‧Airway

2‧‧‧Cutter

3‧‧‧heater

4‧‧‧Semi-finished products

5‧‧‧ plastics

C‧‧‧cloth

P‧‧‧Plastic

Figure 1: Schematic diagram of the cross-sectional structure of the creation before the injection mold is clamped.

Figure 2: Schematic diagram of the cross-sectional structure of the creation before the injection of the cavity into the plastic.

Figure 3: Schematic diagram of the cross-sectional structure of this creation after the injection of plastic into the cavity.

Figure 4: Schematic diagram of the cross-sectional structure of the creation of the fabric in the mold.

Figure 5: Schematic diagram of the cross-sectional structure of the creation when the mold is opened after the semi-finished product is produced.

Figure 6: Schematic diagram of the cross-sectional structure of the plastic material produced by this creation.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The manufacturing method of the plastic material can be combined with an injection mold to mold the plastic on the fabric, and cut the fabric directly in the injection mold.

In order to facilitate the implementation of the above manufacturing method, the present invention further provides an injection mold; referring to FIG. 1 , the injection mold substantially includes a plurality of modules 1 and a cutter 2, and the cutter 2 is disposed in the plurality of modules 1.

Referring to FIG. 2, the plurality of modules 1 can be combined to form a cavity 11 and a cloth passage 12; the cavity 11 is for injecting plastic space, and the cloth passage 12 is for The space of the cloth is laid, and the cloth passage 12 communicates with the cavity 11 and the outside.

In this embodiment, the plurality of modules 1 can constitute a male mold 1a and a female mold 1b. The inner mold mask of the male mold 1a has a convex portion 13 having an inner mold surface having a concave surface. The entrance portion 14; when the plurality of modules 1 are clamped, the protruding portion 13 is opposed to the concave portion 14 to jointly form the cavity 11.

In this embodiment, a plastic thin shell can be manufactured from the injection mold to be used as an outer casing of an electronic device such as a mobile phone, a notebook computer, a tablet computer, a PDA, etc., so that the shape of the cavity 11 to be formed in this embodiment is relatively simple, and can be selected. The number of the modules 1 is two, and the two modules 1 are the male mold 1a and the female mold 1b, respectively. In other embodiments, particularly in embodiments where the shape of the cavity 11 is relatively complex, or where the curvature varies greatly (eg, to make other articles or articles made by injection molding), the male mold 1a or the The master 1b may need to be composed of several modules 1 for demolding, so the total number of the modules 1 can be selected to be three or more, which can be understood by those having ordinary knowledge in the art, and can be used according to the needs of use. Adjust the design and configuration relationship, so it is not limited to the type disclosed in this creation.

In addition, the plurality of modules 1 are further provided with a shooting port 15, a sipe 16 and a receiving groove 17, and the injection port 15 is disposed in the male die 1a, and the injection port 15 communicates with the cavity 11. The sipe 16 and the receiving groove 17 are respectively located outside the cavity 11, and the sipe 16 and the receiving groove 17 communicate with the cloth passage 12. The sipe 16 is adapted to receive the cutter 2, and the receiving groove 17 is a space for the cutter 2 to extend the blade portion when cutting the fabric, so that the sipe 16 is opposite to the receiving groove 17. One of them is provided in the male mold 1a, and the other is provided in the female mold 1b.

Preferably, the sipe 16 is disposed on the male die 1a, the receiving groove 17 is disposed in the female die 1b, and the plurality of ejector pins 18 are disposed on the male die 1a to enable the plurality of ejector pins 18 to The cutter 2 is connected to the same telescopic drive source, and controls the cutter 2 or the plurality of ejector pins 18 to be displaced relative to the module 1 at different timings, which simplifies the structure of the mold.

Moreover, the master mold 1b can be provided with a plurality of air suction passages 19, each of which is associated with the air suction passage 19 The cavity 11 is in communication to draw gas from the cavity 11.

The cutter 2 is displaceably disposed in the sipe 16 so as to extend into the receiving groove 17 from the blade portion of the cutting blade 2 or retract from the receiving groove 17 into the sipe 16. Furthermore, the injection mold of the present invention can also be provided with a heater 3 which is connected to the cutter 2 for heating the cutter 2.

According to the above configuration, when the above-described manufacturing method of the plastic material to which the cloth is bonded is performed using the injection mold, referring to Figs. 1 and 2, a cloth C can be first passed through the injection mold to make the portion of the cloth C It is located in the cavity 11 formed when the injection mold is closed. The cloth C has two opposite surfaces, and the male mold 1a and the female mold 1b of the injection mold are respectively opposed to the two surfaces of the cloth C; if one surface of the cloth C has a pattern, the cloth C should have a pattern The surface faces the master mold 1b.

After the cloth C is attached to the inner mold surface of the master mold 1b, the injection mold is clamped so that the cloth C is not located at other portions of the mold cavity 11, and can be placed when the injection mold is closed. The formed cloth passage 12 is sandwiched by the male mold 1a and the female mold 1b, so that the cavity 11 forms a closed space that cannot communicate with the outside. In the embodiment in which the plurality of suction passages 19 are provided in the master mold 1b, the gas in the cavity 11 may be sucked by the plurality of suction passages 19 before the injection mold is clamped to make the cloth C. It can be quickly and closely applied to the inner mold surface of the master mold 1b.

Referring to FIG. 3, the plastic P is injection molded from one of the surfaces of the cloth C by the injection mold. In detail, since the mold hole 11 can be closed by the cloth C, the male mold 1a and the female mold 1b into a closed space after the injection mold is closed, the injection mold can pass the molten plastic P through the shot. The port 15 is injected into the cavity 11, and is gradually cooled and solidified in the cavity 11.

Referring to FIG. 4, after the plastic P is injected into the cavity 11, the fabric C can be cut directly in the injection mold to obtain a film in which the fabric C is bonded in the cavity 11 of the injection mold. Semi-finished product 4. In detail, when the cutter 2 is an annular cutter, the cutter 2 provided in the sipe 16 is actuated to cause translation, so that the blade portion of the cutter 2 can be cut after the fabric C is cut. The cutting groove 17 is inserted into the receiving groove 17; alternatively, the non-annular cutting blade 2 can be driven to wrap around the sipe 16 to achieve the same effect of cutting the cloth C. After the cutting of the cloth C is completed, the cutter 2 is then retracted from the receiving groove 17 into the sipe 16.

In the present embodiment, since the heater 3 is connected to the cutter 2, the heater 3 can heat the cutter 2 so that the cutter 2 at a high temperature cuts the fabric C as well. The burr and the thread end can be removed from the cutting edge of the cloth C to form a edging effect. In this way, the semi-finished product 4 does not need to be connected to the edge after the demolding, which helps to improve the overall process efficiency.

Referring to FIG. 5, after the plastic P injected into the cavity 11 is solidified, and the cutting of the cloth C is completed, the injection mold can be opened, and the plurality of ejector pins 18 of the injection mold are topped. The semi-finished product 4 is pushed to separate the semi-finished product 4 from the male mold 1a so as to take out the semi-finished product 4.

Referring to FIG. 6, the semi-finished product 4 is subjected to some post-processing procedures to obtain a plastic material 5 having a plastic shell which is solidified by plastic P, and the plastic shell is coated with the fabric C. The post-processing program may, for example, trim the semi-finished product 4, remove the residual solidified plastic P corresponding to the shot opening 15 of the semi-finished product 4, or dig an opening corresponding to a function key or a camera lens or the like of the electronic product. In addition, a hard layer of a layer of gold oil (also using a transparent glue) may be coated on the surface of the semi-finished product 4 having the cloth C to protect the pattern on the cloth C from being scratched by foreign objects. The peeling off also increases the appearance texture of the plastic material 5.

It is worth mentioning that the cloth C can be pre-coated with a glue on the surface for injection molding of the plastic P, and the adhesive can be polyurethane (PU), thermoplastic polyurethane (TPU), epoxy resin ( Epoxy) or hot melt adhesive. According to this, when the injection mold injects the molten plastic P into the cavity 11, the adhesion between the cloth C and the plastic P can be enhanced by the adhesive applied to the surface of the cloth C. On the other hand, the cloth C is coated with a glue, and the small pores of the cloth C can be filled by the adhesive, so that the cloth C is more easily stabilized by the plurality of suction passages 19. Solid suction.

Moreover, the cloth C may be a cloth of different materials or weaves such as leather cloth, woven fabric, plastic cloth, woven fabric or non-woven fabric, and the plastic P may be polycarbonate (PC), ABS resin, PC/ABS. Material such as rubber and glass fiber reinforced plastic (FEP); the material of the cloth C or the plastic P can be adjusted according to the needs of use, and the creation is not limited.

In addition, in this embodiment, the two ends of the cloth C can be respectively coupled to a reel (not shown), so that when the two reels are controlled to be rolled, the fabric C is released by one of the reels. And the fabric C is taken up by another reel. The two reels are respectively located at two ends of the injection mold, so that the male mold 1a and the female mold 1b of the injection mold are respectively opposed to the two surfaces of the cloth C to jointly penetrate the cloth C in the injection mold. The parts are subjected to the above steps of cutting and cutting. Accordingly, the manufacturing method of the present invention can control the scrolling of the two reels after a semi-finished product 4 is separated from the injection mold, so that the fabric C is translated in the injection mold by a predetermined distance to continue the next semi-finished product. 4 production. In this way, the manufacturing method of the creation can be continuously operated, which not only improves the efficiency of the overall process, but also enables the fabric C to be used successively, reducing the proportion of the area of the entire roll of fabric C that becomes surplus material, and helping to reduce the material. cost.

In summary, the creation is used to manufacture an injection mold that combines the plastic material of the fabric, and the fabric can be cut after the plastic is injected to the fabric to greatly reduce the alignment accuracy of the fabric in the cavity. The impact, even if the operator's experience is not enough, it is not easy to reduce the product yield because of the inability to accurately position the fabric. Therefore, this creation can improve product yield, save manpower and time costs, reduce production costs and improve process efficiency.

This creation is used to make an injection mold that combines the plastic material of the fabric. After the plastic is injected to the fabric, the fabric can be cut directly in the injection mold to improve the cutting accuracy and simplify the process, and improve the product. Rate and efficiency of process efficiency.

Although the present invention has been disclosed by the above-described preferred embodiments, it is not intended to limit the present invention, and those skilled in the art are not able to depart from the spirit and scope of the present invention. The various modifications and modifications of the embodiments are still within the technical scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application.

1‧‧‧ module

1a‧‧‧Male model

1b‧‧‧Female model

11‧‧‧ cavity

12‧‧‧ cloth passage

13‧‧‧Protruding

14‧‧‧ recessed

15‧‧‧ shot mouth

16‧‧‧Slot

17‧‧‧ socket

18‧‧‧ thimble

19‧‧‧Airway

2‧‧‧Cutter

3‧‧‧heater

4‧‧‧Semi-finished products

C‧‧‧cloth

P‧‧‧Plastic

Claims (3)

An injection mold for manufacturing a plastic material combined with a cloth, comprising: a plurality of modules, the plurality of modules together forming a cavity and a cloth passage, the cloth passage connecting the cavity and the outside, the plurality of The module is provided with a shooting port, a sipe and a receiving groove, the injection port is in communication with the cavity, the sipe is opposite to the receiving groove, the sipe and the receiving groove are located outside the cavity, and the knives The slot and the receiving slot are both in communication with the cloth passage; and a cutter, the cutter being displaceably disposed in the slot. The injection mold for manufacturing a plastic material combined with a fabric according to the first aspect of the invention, wherein the plurality of modules constitute a male mold and a female mold, and the injection opening is disposed in the male mold, the female The mold is provided with a plurality of air suction passages, each of which is in communication with the mold cavity. An injection mold for manufacturing a plastic material incorporating a fabric as described in claim 1 or 2, further comprising a heater connected to the cutter for heating the cutter.