Injection mold for a metal-coated mesh injection molded part

Abstract

The application discloses a metal net wrapping injection molding mold, which comprises a male mold core, a female mold core and a ejector sleeve, the female mold core is arranged opposite to the male mold core, a section of the female mold core hole far from the male mold core is used for loading a female mold insert, and a section of the female mold core hole close to the male mold core is a first injection cavity used for one side injection of a workpiece; a section of the male mold core hole close to the female mold core is a second injection cavity used for the other side injection of the workpiece, the second injection cavity is opposite to the first injection cavity, a plurality of injection material injection channels are arranged in the female mold core, the ejector sleeve passes through the male mold core hole, an ejector sleeve end of the ejector sleeve extends to the bottom of the second injection cavity, a ejector pin end of the ejector sleeve extends to the first injection cavity, a supporting part is arranged at the ejector pin end, a jacking post is arranged at the middle part of the female mold insert, and a compression spring groove is arranged at the jacking post end far from the male mold core. The injection molding mold can integrally injection mold the metal net wrapping injection molding part, the positioning of the metal net is stable, and the size precision of the injection molding workpiece can be improved.

Description

Technical Field

[0001] This invention relates to the field of injection molds, and in particular to an injection mold for injection molded parts covered with metal mesh. Background Technology

[0002] Injection molding is a method of industrial product manufacturing, typically using rubber or plastic injection molding. Injection molds are crucial components of injection molding equipment. For plastic parts with metal mesh, two processing methods are commonly used. The first method involves injection molding the plastic part, followed by manual ultrasonic welding to connect the metal mesh to the plastic part. The disadvantages of this method are numerous steps, requiring secondary processing, and the manual ultrasonic welding connection between the metal mesh and the plastic part is not strong, easily leading to detachment. The second method uses inserts for injection molding. However, because the metal mesh is an elastic element, unlike ordinary insert injection molding, its dimensional tolerances fluctuate during injection, resulting in unstable positioning in the injection mold. After molding, the metal mesh easily separates from the plastic part. Furthermore, the pressure on the metal mesh cannot be accurately controlled during production, leading to swelling defects and product defects. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the injection molding of workpieces with metal mesh as described in the background art, and to provide an injection mold for injection molded parts with metal mesh.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an injection mold for a metal mesh injection molded part, comprising a male mold core, a female mold core, and an ejector sleeve. The female mold core and the male mold core are arranged opposite each other, and the female mold core hole in the middle of the female mold core is directly opposite the male mold core hole in the middle of the male mold core. The section of the female mold core hole away from the male mold core is used to insert a female mold inserter, and the section of the female mold core hole near the male mold core is a first injection cavity for injection molding one side of the workpiece. The section of the male mold core hole near the female mold core is a second injection cavity for injection molding the other side of the workpiece, and the second injection cavity is directly opposite the first injection cavity. A plurality of injection channels are provided in the female mold core, and the end faces of the male mold core and the female mold core opposite each other are provided with channels communicating with the injection channels. The injection molding process includes a flow channel for the plastic injection and a connection hole between the flow channel and the second injection cavity. The ejector sleeve passes through the male mold core hole, and the sleeve end of the ejector sleeve extends to the bottom of the second injection cavity to seal the bottom of the second injection cavity. The ejector end of the ejector sleeve extends into the first injection cavity. A support part for supporting the injection metal mesh is provided at the end of the ejector pin. A positioning part for positioning the outer periphery of the injection metal mesh is provided at the end of the female mold core. A through hole is provided in the middle of the female mold core, and the through hole is directly opposite the middle of the injection metal mesh. An ejector post is provided in the through hole. A compression spring groove is provided on the side of the ejector post away from the male mold core. One end of the compression spring is located in the compression spring groove, and the other end of the compression spring abuts against the female mold plate on the side of the female mold core.

[0005] In the above scheme, at least two sets of clamping mechanisms are provided between the male mold core and the female mold core. Grooves adapted to the ejector rods of the clamping mechanisms are provided on the opposing surfaces of the male and female mold cores. A limiting groove corresponding to the ejector rod is provided on the ejector sleeve. The ejector rod of the clamping mechanism is a telescopic ejector rod, the end of which can extend into the limiting groove on the outer wall of the ejector sleeve. By setting the clamping mechanism, the ejector sleeve can be limited and fixed, restricting its axial and circumferential movement and ensuring the dimensional accuracy of the injection molded workpiece.

[0006] In the above scheme, the clamping mechanism is a pneumatic slider clamping mechanism. By setting a pneumatic clamping mechanism, the extension and retraction of the clamping rod can be easily controlled automatically.

[0007] In the above scheme, the shape of the positioning part on the female mold insert corresponds to the outer periphery of the metal mesh and the top shape of the injection molded workpiece; the shape of the inner wall of the first and second injection cavities corresponds to the outer wall shape of the workpiece; and the part on the outer wall of the ejector sleeve corresponding to the first and second injection cavities corresponds to the inner wall shape of the workpiece. This arrangement allows for a firm connection between the injection molded workpiece and the lower edge of the metal mesh, enabling the processing of the workpiece with the metal mesh to be completed through injection molding without secondary processing, thus improving the quality of the manufactured workpiece.

[0008] In the above scheme, the connection hole between the injection molding material flow channel and the second injection cavity is an inclined hole that slopes towards the second injection cavity, and the diameter of the connection hole gradually decreases from the injection molding material flow channel to the second injection cavity. This arrangement ensures that the injection molding material has sufficient pressure when injected into the injection cavity.

[0009] In the above scheme, the male mold core is provided with a waste discharge channel that communicates with the injection molding flow channel, and an ejector pin is provided in the waste discharge channel. With this configuration, when a workpiece is injection molded, the ejector pin pushes out, thereby discharging the waste material and keeping the injection molding flow channel unobstructed.

[0010] The present invention has the following positive effects: The injection mold of the metal mesh-coated injection mold of the present invention can perform integral injection molding of the metal mesh-coated injection mold, can stably position the metal mesh during the injection process, can stably connect the metal mesh and the injection mold, can make the pressure of the metal mesh moderate, prevent the metal mesh from swelling and deforming, and can improve the dimensional accuracy of the injection molded workpiece. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the injection mold for the metal mesh injection molded part of the present invention.

[0012] Figure 2 This is a schematic diagram of the injection mold for the metal mesh injection molded part of the present invention (the male mold core is not shown).

[0013] Figure 3 This is a schematic diagram showing the internal cross-sectional structure of the male and female mold cores of the metal mesh injection molded part of the present invention.

[0014] The reference numerals in the figure are as follows: female mold core 1, first injection cavity 11, injection channel 12, male mold core 2, second injection cavity 21, injection flow groove 22, connecting hole 23, waste discharge channel 24, first ejector pin 25, ejector sleeve 3, second ejector pin 31, sleeve 32, support part 33, female mold insert 4, positioning part 41, ejector pin 5, compression spring 6, clamping mechanism 7, ejector rod 71, female mold plate 8, metal mesh 9, injection molded part 10. Detailed Implementation

[0015] The technical solution of the present invention will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1-3The injection mold shown is for a metal mesh injection molded part, including a male mold core 2, a female mold core 1, an ejector pin sleeve 3, and other injection mold components. Since the improvement of the present invention is mainly an improvement of the male mold core 2 and the female mold core 1, the other components of the injection mold are not specifically described. However, for those skilled in the art, these injection mold components can be selected from existing injection mold components, which does not affect the implementation of the present invention.

[0017] The male mold core 2 and the female mold core 1 of the present invention are both metal plate-shaped structural parts with a certain thickness. The female mold core 1 and the male mold core 2 are arranged opposite to each other, and the female mold core hole in the middle of the female mold core 1 is arranged directly opposite to the male mold core hole in the middle of the male mold core.

[0018] The section of the female mold core hole away from the male mold core is used to insert the female mold insert 4, and the section of the female mold core hole near the male mold core 2 is the first injection cavity 11 for upper injection of the workpiece.

[0019] The section of the male mold core hole near the female mold core 1 is the second injection cavity 21 for lower injection molding of the workpiece. The second injection cavity 21 is directly opposite the first injection cavity 11, and the first injection cavity 11 and the second injection cavity 21 are combined to form the workpiece injection cavity.

[0020] The female mold core 1 has several injection channels 12. In the embodiment shown in the attached figure, there are a total of 3 injection channels 12. An injection flow groove 22 communicating with the injection channels 12 is provided on the opposite end face of the male mold core 2 and the female mold core 1. A connecting hole 23 is provided between the injection flow groove 22 and the second injection cavity 21. The connecting hole 23 is an oblique hole inclined towards the second injection cavity, and its diameter gradually decreases from the injection flow groove 22 to the second injection cavity 21. A waste discharge channel 24 communicating with the injection flow groove 22 is provided in the male mold core 2, and a first ejector pin 25 is provided in the waste discharge channel 24.

[0021] The ejector sleeve 3 passes through the male mold core hole. The end of the ejector sleeve 32 extends to the bottom of the second injection cavity 21 to seal the bottom of the second injection cavity 21. The end of the second ejector 31 of the ejector sleeve 3 extends into the first injection cavity 11. The end of the second ejector 31 is provided with a support part 33 for supporting the injection metal mesh 9. The end of the female mold insert 4 is provided with a positioning part 41 for positioning the outer periphery of the injection metal mesh 9. A through hole is provided in the middle of the female mold insert 4, which is directly opposite to the middle of the injection metal mesh 9. An ejector post 5 is provided in the through hole. The end of the ejector post 5 away from the male mold core 2 is provided with a compression spring groove. One end of the compression spring 6 is provided in the compression spring groove, and the other end of the compression spring 6 is pressed against the female mold plate 8 on the side of the female mold core 1.

[0022] At least two sets of clamping mechanisms 7 are provided between the male mold core 2 and the female mold core 1. Grooves adapted to the ejector rods 71 ​​of the clamping mechanisms 7 are provided on the opposing surfaces of the male mold core 2 and the female mold core 1. A limiting groove corresponding to the ejector rod 71 is provided on the ejector sleeve 32. The ejector rod 71 of the clamping mechanism 7 is a telescopic ejector rod, and its end can extend into the limiting groove on the outer wall of the ejector sleeve 32. By providing the clamping mechanism 7, the ejector sleeve 32 can be limited and fixed, restricting its axial and circumferential movement and ensuring the dimensional accuracy of the injection molded workpiece. The clamping mechanism 7 can be a pneumatic slider clamping mechanism.

[0023] The shape of the positioning part 41 on the female mold insert 4 corresponds to the outer periphery of the metal mesh 9 and the top shape of the injection molded workpiece 10. The shape of the inner wall of the first injection cavity 11 and the second injection cavity 21 corresponds to the outer wall shape of the workpiece. The part on the outer wall of the ejector sleeve 3 corresponding to the first injection cavity 11 and the second injection cavity 21 corresponds to the inner wall shape of the workpiece. With this arrangement, a firm connection can be formed between the injection molded workpiece 10 and the lower edge of the metal mesh 9. The processing of the workpiece with the metal mesh 9 can be completed by injection molding without secondary processing, which can improve the quality of the manufactured workpiece.

[0024] The injection mold for the metal mesh injection molded part of the present invention, the male mold core 2 and the female mold core 1 can be made according to the attached... Figure 1The direction shown can be set vertically or horizontally, and the setting direction can be set according to the structure of the injection molding device. When using the injection mold for the metal mesh injection molded part of the present invention, first open the male mold core 2 and the female mold core 1, and retract the ejector rod of the clamping mechanism 7. When the male mold core 2 and the female mold core 1 are open, the ejector pin 5 in the female mold insert 4 moves towards the male mold core 2 under the action of the compression spring 6. Then, the metal mesh 9 that needs to be connected to the injection molded workpiece 10 is placed at the end of the second ejector pin 31 of the ejector sleeve 3. Then, the male mold core 2 and the female mold core 1 close the mold. During the mold closing process, the ejector pin 5 in the female mold insert 4 first contacts the metal mesh 9, and then gradually increases the pressure under the action of the compression spring 6, so that the position of the metal mesh 9 at the end of the second ejector pin 31 is automatically aligned, and the positioning part 41 on the female mold insert 4 presses against the outer side of the metal mesh 9 to position the metal mesh 9. After the male mold core 2 and the female mold core 1 are closed... After the mold is in place, the injection molding of the workpiece begins. The injection plastic, heated to a liquid state, is injected through the injection channel 12 on the female mold core 1. The injection plastic flows through the injection flow groove 22 and the connecting hole 23 into the workpiece injection cavity until the workpiece injection cavity is full of injection plastic. Then, the cooling components in the injection mold begin to cool the male mold core 2 and the female mold core 1, so that the injection molded part in the workpiece injection cavity solidifies. Then, the male mold core 2 and the female mold core 1 separate, the ejector rod 71 of the clamping mechanism 7 retracts and leaves the positioning groove on the outer wall of the ejector sleeve 32, and then the ejector sleeve 32 pushes out, so that the injection molded workpiece 10 is separated from the second ejector pin 31 and the workpiece is taken out. The first ejector pin 25 in the waste discharge channel 24 extends towards the female mold core 1, pushing the waste in the waste discharge channel 24 to be discharged, so as to facilitate the processing of the next workpiece.

[0025] The injection mold for the metal mesh-coated injection molded part of the present invention can perform integral injection molding of the metal mesh-coated injection molded part. During the injection molding process, it can stably position the metal mesh, stably connect the metal mesh and the injection molded part, and make the pressure on the metal mesh moderate to prevent the metal mesh from swelling and deforming, and improve the dimensional accuracy of the injection molded part.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold for a metal mesh-encased injection molded part, characterized in that: The system includes a male mold core, a female mold core, and an ejector sleeve. The female mold core and the male mold core are positioned opposite each other, with the female mold core hole in the middle of the female mold core directly opposite the male mold core hole in the middle of the male mold core. The section of the female mold core hole furthest from the male mold core is used to insert a female mold inserter. The section of the female mold core hole closest to the male mold core is a first injection cavity for injection molding one side of the workpiece. The section of the male mold core hole closest to the female mold core is a second injection cavity for injection molding the other side of the workpiece, directly opposite the first injection cavity. Several injection channels are provided within the female mold core. Injection flow grooves, connected to the injection channels, are provided on the opposite end faces of the male and female mold cores. These injection flow grooves are connected to the second injection cavity. A connecting hole is provided between the two parts. The ejector sleeve passes through the male mold core hole. The ejector sleeve end extends to the bottom of the second injection cavity to seal the bottom of the second injection cavity. The ejector end of the ejector sleeve extends into the first injection cavity. A support part for supporting the injection metal mesh is provided at the end of the ejector pin. A positioning part for positioning the outer periphery of the injection metal mesh is provided at the end of the female mold core. A through hole is provided in the middle of the female mold core. The through hole is directly opposite the middle of the injection metal mesh. An ejector post is provided in the through hole. A compression spring groove is provided on the side of the ejector post away from the male mold core. One end of the compression spring is located in the compression spring groove, and the other end of the compression spring abuts against the female mold plate on the side of the female mold core.

2. The injection mold for the metal mesh-coated injection molded part according to claim 1, characterized in that: At least two sets of clamping mechanisms are provided between the male mold core and the female mold core. Grooves adapted to the push rods of the clamping mechanisms are provided on the opposite surfaces of the male mold core and the female mold core. A limiting groove is provided on the ejector sleeve that is directly opposite the push rod. The push rod of the clamping mechanism is a telescopic push rod, and the end of the push rod can extend into the limiting groove on the outer wall of the ejector sleeve.

3. The injection mold for the metal mesh-coated injection molded part according to claim 2, characterized in that: The clamping mechanism is a pneumatic slider clamping mechanism.

4. The injection mold for the metal mesh-coated injection molded part according to claim 1, characterized in that: The shape of the positioning part on the master mold corresponds to the outer periphery of the metal mesh and the top shape of the injection molded workpiece. The shape of the inner wall of the first injection cavity and the second injection cavity corresponds to the outer wall shape of the workpiece. The part on the outer wall of the ejector sleeve that corresponds to the first injection cavity and the second injection cavity corresponds to the inner wall shape of the workpiece.

5. The injection mold for the metal mesh-coated injection molded part according to claim 1, characterized in that: The connection hole between the injection molding flow channel and the second injection cavity is an inclined hole that slopes towards the second injection cavity. The diameter of the connection hole gradually decreases from the injection molding flow channel to the second injection cavity.

6. The injection mold for the metal mesh-coated injection molded part according to claim 1, characterized in that: The male mold core is provided with a waste material discharge channel that is connected to the injection molding flow groove, and an ejector pin is provided in the waste material discharge channel.

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