Injection mold

Abstract

The invention relates to the technical field of molds, in particular to an injection mold which comprises a movable mold assembly and a fixed mold assembly. Wherein the movable mold assembly comprises a movable mold bottom plate, a movable mold frame and a movable mold core, the movable mold frame is arranged on the movable mold bottom plate, the movable mold core is embedded in the side, deviating from the movable mold bottom plate, of the movable mold frame, an injection molding opening is formed in the movable mold bottom plate, a flow channel is formed in the movable mold frame, a plurality of flow dividing openings are formed in the movable mold frame, and the flow dividing openings are communicated with the flow channel. The runner is respectively communicated with the injection molding opening and the plurality of shunting openings; the fixed mold assembly comprises a fixed mold bottom plate and a fixed mold core embedded in the fixed mold bottom plate, a cavity is formed between the fixed mold core and the movable mold core, and the multiple flow dividing openings communicate with the cavity. The method has the effect of reducing the possibility that the product percent of pass is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of molds, and in particular to an injection mold. Background Art

[0002] At present, injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the injection of heated and melted injection materials into the mold cavity of the injection mold by the injection molding machine under high pressure, and then the molded product is obtained after cooling and solidification. The injection mold consists of a movable mold and a fixed mold. The movable mold is installed on the movable mold plate of the injection molding machine, and the fixed mold is installed on the fixed mold plate of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the injection molded product.

[0003] Regarding the above-mentioned related technologies: During the injection molding process, the injection material usually enters the mold cavity through a single injection port, and the distribution of the injection material in the mold cavity is mainly affected by fluidity. Therefore, when producing products with complex structures such as mesh dust covers, areas far away from the injection port are prone to uneven distribution of the injection material, which will lead to a decrease in the product qualification rate. Summary of the invention

[0004] In order to reduce the possibility of reduced product qualification rate, the present application provides an injection mold.

[0005] The present application provides an injection mold, which adopts the following technical solution: An injection mold, comprising: A movable mold assembly comprises a movable mold base plate, a movable mold frame and a movable mold core, wherein the movable mold frame is arranged on the movable mold base plate, the movable mold core is embedded on a side of the movable mold frame away from the movable mold base plate, an injection port is arranged on the movable mold base plate, a flow channel is arranged on the movable mold frame, a plurality of diversion ports are arranged on the movable mold frame, and the flow channel is respectively connected with the injection port and the plurality of diversion ports; The fixed mold assembly comprises a fixed mold bottom plate and a fixed mold core embedded in the fixed mold bottom plate, a mold cavity is formed between the fixed mold core and the movable mold core, and a plurality of diversion ports are respectively connected to the mold cavity.

[0006] By adopting the above technical solution, after the injection molding material is injected from the injection port, the injection molding material can first flow into the runner, then flow into multiple branch ports through the runner, and finally flow into the cavity through the branch ports, thereby helping to make the injection molding material more quickly and evenly distributed to various parts of the cavity, so as to reduce the possibility of uneven distribution of the injection molding material, resulting in a lower product qualification rate, which is beneficial to improve the product qualification rate.

[0007] Optionally, a protection component is provided between the fixed mold bottom plate and the movable mold frame, and the protection component is used to reduce the impact between the fixed mold bottom plate and the movable mold frame.

[0008] By adopting the above technical solution, when the movable mold base plate drives the movable mold frame and the movable mold core to move toward the fixed mold base plate to complete the mold closing, the protection component can buffer the movable mold frame to reduce the impact between the fixed mold base plate and the movable mold frame, which is beneficial to reduce the possibility of damage between the fixed mold base plate and the movable mold frame, and further helps to extend the service life of the mold.

[0009] Optionally, the protection component includes an upper abutment block, a connecting seat, a lower abutment block and an elastic member, the upper abutment block is arranged on the side wall of the movable mold frame, the connecting seat is arranged on the fixed mold bottom plate and is arranged opposite to the upper abutment block, the connecting seat is provided with a first sliding groove, the lower abutment block is slidably inserted in the first sliding groove, the elastic member is arranged in the first sliding groove and connected to the lower abutment block, and when the fixed mold bottom plate and the movable mold frame are close to each other, the upper abutment block is inserted in the first sliding groove.

[0010] By adopting the above technical solution, when the movable mold base plate drives the movable mold frame and the movable mold core to move in the direction close to the fixed mold base plate, the movable mold frame drives the upper abutment block to move, so that the upper abutment block contacts the lower abutment block and applies pressure to the lower abutment block, and the lower abutment block applies pressure to the elastic member to compress the elastic member. At this time, the elastic member can absorb the impact energy to reduce the impact between the fixed mold base plate and the movable mold frame, which is conducive to reducing the possibility of damage between the fixed mold base plate and the movable mold frame. And when the fixed mold base plate and the movable mold frame are in contact, the upper abutment block can be inserted into the first slide groove, so that the upper abutment block and the connecting seat cooperate with each other, and the fixed mold base plate and the movable mold frame can be limited, which is conducive to reducing the possibility of displacement of the position of the fixed mold base plate and the movable mold frame.

[0011] Optionally, a limiting groove is provided on the upper abutment block, a second sliding groove is provided on the fixed mold bottom plate in the horizontal direction, the second sliding groove is connected to the first sliding groove, a limiting block is slidably inserted in the second sliding groove, and the limiting block can be inserted in the limiting groove.

[0012] By adopting the above technical solution, when the upper abutment block is inserted into the first slide groove, the limiting member can be inserted into the limiting groove to limit the upper abutment block, so that the upper abutment block is not easy to move out of the first slide groove, thereby further improving the connection stability between the fixed mold base plate and the movable mold frame after mold closing.

[0013] Optionally, a heat expansion component is arranged in the second slide groove, and the heat expansion component is connected to the limit block and is located on a side of the limit block close to the cavity.

[0014] By adopting the above technical solution, when the injection molding material is injected into the cavity, the temperature in the cavity rises, so that the heat expansion part expands due to the heat, so as to push the limit block to move, so as to facilitate the insertion of the limit block into the limit groove to limit the upper abutment block, which is helpful to achieve the fixation between the fixed mold bottom plate and the movable mold frame. And when the product in the cavity is fully cooled, the temperature decreases, and the heat expansion part shrinks, so as to drive the limit block to leave the limit groove, so that the limit block no longer limits the upper abutment block, thereby facilitating the separation of the fixed mold bottom plate and the movable mold frame.

[0015] Optionally, the thermal expansion element is made of phase change material.

[0016] By adopting the above technical solution, the thermal expansion component is made of phase change material, so that the thermal expansion component can absorb excess heat during the injection molding process and release the stored heat during the mold cooling stage, which helps to cool the mold more evenly and slow down the speed of the mold switching between high temperature and low temperature, which is beneficial to reduce thermal shock, so that the mold is not easily fatigued or cracked by thermal shock, thereby extending the service life of the mold to a certain extent.

[0017] Optionally, a plurality of protection components are provided, and the plurality of protection components are evenly distributed along the circumference of the fixed mold bottom plate.

[0018] By adopting the above technical solution, multiple protection components cooperate with each other to further reduce the impact between the fixed mold base plate and the movable mold frame, which is beneficial to reduce the possibility of damage between the fixed mold base plate and the movable mold frame, and further helps to extend the service life of the mold.

[0019] Optionally, positioning columns are provided at the four top corners of the fixed mold base plate, and positioning grooves are opened on the movable mold frame. The number of the positioning grooves is equal to the positioning columns, and one positioning column is inserted in one positioning groove.

[0020] By adopting the above technical solution, the positioning column can be inserted into the positioning groove, which makes it easy to position the fixed mold base plate and the movable mold frame during the mold closing process so that the fixed mold base plate and the movable mold frame can be aligned. On the other hand, the fixed mold base plate and the movable mold frame can be limited to reduce the possibility of position deviation between the fixed mold base plate and the movable mold frame.

[0021] Optionally, a pin assembly is provided on a side of the fixed mold bottom plate facing away from the fixed mold core, and the pin assembly is used to push the product out of the mold cavity.

[0022] By adopting the above technical solution and the arrangement of the ejector assembly, it is convenient to push the product out of the cavity after the injection molding is completed, thereby facilitating the demoulding of the product.

[0023] Optionally, the ejector assembly includes an ejector plate and a plurality of ejector pins arranged on the ejector plate, the ejector plate is slidably connected to the fixed mold bottom plate, the ejector pins penetrate the fixed mold bottom plate and correspond to the cavity, and the ejector plate is used to drive the ejector pins to move.

[0024] By adopting the above technical solution, when the product needs to be demoulded, the ejector plate is moved, and the ejector plate drives the ejector to move, so that the ejector is inserted into the cavity, so that the ejector ejects the product from the cavity, thereby completing the demoulding of the product.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the movable mold base plate, movable mold frame, movable mold core, fixed mold base plate and fixed mold core, the injection material can flow into the cavity through the injection port, runner and multiple diversion ports in sequence, which is conducive to evenly distributing the injection material to various parts of the cavity, so as to reduce the possibility of uneven distribution of the injection material and reduce the possibility of lowering the qualified rate of the product, thereby helping to improve the qualified rate of the product; 2. Through the cooperation between the upper abutment block, the connecting seat, the lower abutment block and the elastic member, when the movable mold frame drives the upper abutment block to move toward the direction close to the fixed mold bottom plate, the upper abutment block can apply pressure to the elastic member through the lower abutment block, so that the elastic member absorbs the impact energy, which is conducive to reducing the impact between the fixed mold bottom plate and the movable mold frame, so as to reduce the possibility of damage between the fixed mold bottom plate and the movable mold frame, and at this time, the upper abutment block and the connecting seat can jointly limit the fixed mold bottom plate and the movable mold frame, so as to reduce the possibility of displacement of the position of the fixed mold bottom plate and the movable mold frame; 3. Through the cooperation between the upper abutment block, the limit block and the heat expansion member, when the injection material is injected into the cavity, the heat expansion member can expand due to the heat to push the limit block to be inserted into the limit groove, so that it is convenient to use the limit block to limit the upper abutment block to achieve the fixation between the fixed mold base plate and the movable mold frame, and when the product in the cavity is fully cooled, the heat expansion member can shrink to drive the limit block to leave the limit groove, thereby facilitating the separation of the fixed mold base plate and the movable mold frame; 4. The thermal expansion parts are made of phase change materials, so that the thermal expansion parts can absorb excess heat during the injection molding process and release the stored heat during the mold cooling stage, which helps to cool the mold more evenly and slows down the speed at which the mold switches between high and low temperatures, which in turn helps to reduce thermal shock, so that the mold is not easily fatigued or cracked by thermal shock, thereby extending the service life of the mold to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the injection mold in Example 1 of the present application.

[0027] Figure 2It is a schematic diagram of the exploded structure of the injection mold in Example 1 of the present application.

[0028] Figure 3 is along Figure 1 Section view along line AA.

[0029] Figure 4 It is a schematic diagram of the exploded structure of the injection mold from another perspective in Example 1 of the present application.

[0030] Figure 5 It is a front view of the injection mold in Example 2 of the present application.

[0031] Figure 6 is along Figure 5 Cross-sectional view along line BB.

[0032] Description of reference numerals: 1. Moving mold assembly; 11. Moving mold base plate; 111. Injection port; 12. Moving mold frame; 121. Runner; 122. Diverter port; 123. Positioning slot; 13. Moving mold core; 2. Fixed mold assembly; 21. Fixed mold base plate; 211. Positioning column; 212. Second slide slot; 213. Limiting block; 214. Thermal expansion member; 22. Fixed mold core; 23. Cavity; 3. Ejector assembly; 31. Ejector plate; 32. Ejector; 4. Protection assembly; 41. Upper abutment block; 411. Limiting slot; 42. Connecting seat; 421. First slide slot; 43. Lower abutment block; 44. Elastic member. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The embodiment of the present application discloses an injection mold.

[0035] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] Example 1 Reference Figure 1 The injection mold includes a movable mold component 1, a fixed mold component 2 and an ejector component 3. The movable mold component 1 is arranged opposite to the fixed mold component 2, the ejector component 3 is arranged on the side of the fixed mold component 2 away from the movable mold component 1, and the ejector component 3 is used to realize product demoulding.

[0037] Reference Figure 2 and Figure 3 The movable mold assembly 1 includes a movable mold base plate 11, a movable mold frame 12 and a movable mold core 13. The movable mold frame 12 is fixedly connected to the movable mold base plate 11, the movable mold core 13 is embedded in the side of the movable mold frame 12 away from the movable mold base plate 11, and the movable mold base plate 11 is provided with an injection port 111, and the movable mold frame 12 is provided with a flow channel 121 on the side close to the movable mold base plate 11, and the movable mold frame 12 is provided with a plurality of diversion ports 122, and the flow channel 121 is respectively connected with the injection port 111 and the plurality of diversion ports 122.

[0038] Reference Figure 2 and Figure 4 The fixed mold assembly 2 includes a fixed mold bottom plate 21 and a fixed mold core 22 embedded in the fixed mold bottom plate 21. Among them, the four top corners of the fixed mold bottom plate 21 are fixedly connected with positioning columns 211, and the movable mold frame 12 is provided with positioning grooves 123, the number of positioning grooves 123 is equal to the number of positioning columns 211, and one positioning column 211 is inserted into one positioning groove 123.

[0039] When the movable mold base plate 11 drives the movable mold frame 12 to move toward the fixed mold base plate 21, the positioning column 211 can be inserted into the positioning groove 123, so as to facilitate the positioning of the fixed mold base plate 21 and the movable mold frame 12 during the mold closing process so that the fixed mold base plate 21 and the movable mold frame 12 can be aligned, and on the other hand, the fixed mold base plate 21 and the movable mold frame 12 can be limited to reduce the possibility of position deviation of the fixed mold base plate 21 and the movable mold frame 12.

[0040] Reference Figure 2 and Figure 3 When the fixed mold base plate 21 is fitted with the movable mold frame 12, the fixed mold base plate 21 and the movable mold frame 12 are in a mold closing state. At this time, a relatively closed cavity 23 is formed between the fixed mold core 22 and the movable mold core 13, and multiple diversion ports 122 are respectively connected to the cavity 23, so that the injection material can flow into various parts of the cavity 23 through the diversion ports 122.

[0041] Reference Figure 2 The ejector assembly 3 includes an ejector plate 31 and a plurality of ejector pins 32 fixedly connected to the ejector plate 31. The ejector plate 31 is slidably connected to the side of the fixed mold bottom plate 21 away from the movable mold core 13, and the ejector pins 32 penetrate the fixed mold bottom plate 21 and are arranged corresponding to the cavity 23.

[0042] When the product needs to be demoulded, the ejector plate 31 is moved, and the ejector plate 31 drives the ejector 32 to move, so that the ejector 32 is inserted into the cavity 23, so that the ejector 32 can eject the product from the cavity 23, thereby completing the demoulding of the product.

[0043] The implementation principle of an injection mold in an embodiment of the present application is: when the movable mold frame 12 is fitted with the fixed mold base plate 21 to achieve mold closing, the injection material is injected from the injection port 111, so that the injection material flows into the runner 121 through the injection port 111, and flows into multiple branch ports 122 through the runner 121, and finally flows into the cavity 23 through the branch port 122, thereby facilitating the injection material to be more quickly and evenly distributed to various parts of the cavity 23 to achieve injection molding of the product.

[0044] When the product formed in the cavity 23 is sufficiently cooled, the movable mold frame 12 and the movable mold core 13 are driven by the movable mold bottom plate 11 to move away from the fixed mold bottom plate 21 to open the mold, and then the ejector plate 31 is moved to use the ejector 32 to eject the product from the cavity 23, thereby completing the demolding operation.

[0045] In the embodiment of the present application, by setting the flow channel 121 and multiple diversion ports 122, the injection material can be evenly distributed to various parts of the cavity 23, which is beneficial to reduce the possibility of uneven distribution of the injection material, resulting in a lower product qualification rate, and further helps to improve the product qualification rate.

[0046] Example 2 Reference Figure 5 The difference between this embodiment and the first embodiment is that a protection component 4 is provided between the fixed mold base plate 21 and the movable mold frame 12 .

[0047] Reference Figure 5 and Figure 6 The protection components 4 are provided with a plurality of them, and the plurality of protection components 4 are evenly distributed along the circumference of the fixed mold bottom plate 21, and the protection components 4 include an upper abutment block 41, a connection seat 42, a lower abutment block 43 and an elastic member 44. Among them, the upper abutment block 41 is fixedly connected to the side wall of the movable mold frame 12, and the connection seat 42 is fixedly connected to the fixed mold bottom plate 21 and is arranged opposite to the upper abutment block 41.

[0048] Reference Figure 6 The connecting seat 42 is provided with a first slide groove 421, the lower abutting block 43 is slidably inserted in the first slide groove 421 and fits against the inner wall of the first slide groove 421, and the elastic member 44 is arranged in the first slide groove 421 and fixedly connected to the lower abutting block 43. In this embodiment, the elastic member 44 is a spring. In other embodiments, the elastic member 44 can also be configured as an airbag.

[0049] When the movable mold base plate 11 drives the movable mold frame 12 to move toward the fixed mold base plate 21, the movable mold frame 12 drives the upper abutment block 41 to move, so that the upper abutment block 41 abuts against the lower abutment block 43 and applies pressure to the lower abutment block 43, and the lower abutment block 43 applies pressure to the elastic member 44 to compress the elastic member 44. At this time, the elastic member 44 can absorb the impact energy to reduce the impact between the fixed mold base plate 21 and the movable mold frame 12, thereby helping to reduce the possibility of damage between the fixed mold base plate 21 and the movable mold frame 12.

[0050] When the fixed mold base plate 21 is fitted with the movable mold frame 12, the upper abutment block 41 can be inserted into the first slide groove 421 and fit with the inner wall of the first slide groove 421, so that the upper abutment block 41 and the connecting seat 42 cooperate with each other, which can limit the fixed mold base plate 21 and the movable mold frame 12, thereby helping to reduce the possibility of position deviation of the fixed mold base plate 21 and the movable mold frame 12.

[0051] Reference Figure 6 A limiting groove 411 is provided on the upper abutting block 41 , a second sliding groove 212 is provided on the fixed mold bottom plate 21 in the horizontal direction, the second sliding groove 212 is connected to the first sliding groove 421 , and a limiting block 213 is slidably inserted in the second sliding groove 212 .

[0052] When the upper abutment block 41 is inserted into the first slide groove 421, the limit block 213 can be inserted into the limit groove 411 to limit the upper abutment block 41, so that the upper abutment block 41 is not easy to move out of the first slide groove 421, thereby further improving the connection stability between the fixed mold base plate 21 and the movable mold frame 12 after the mold is closed.

[0053] Reference Figure 6 A heat expansion member 214 is disposed in the second chute 212, and the heat expansion member 214 is connected to the limit block 213 and is located on the side of the limit block 213 close to the fixed mold core 22. In this embodiment, the heat expansion member 214 is made of phase change material, so that the heat expansion member 214 can absorb excess heat during the injection molding process, and release the stored heat during the mold cooling stage, thereby helping to cool the mold more evenly and slowing down the speed of switching between high temperature and low temperature of the mold, so that the mold is not easily fatigued or cracked by thermal shock, and the service life of the mold is extended to a certain extent.

[0054] The implementation principle of the injection mold of the second embodiment of the present application is as follows: when the injection molding material is injected into the cavity 23, the temperature in the cavity 23 rises, causing the heat expansion member 214 to expand due to the heat, so as to push the limit block 213 to be inserted into the limit groove 411, thereby facilitating the fixation of the fixed mold base plate 21 and the movable mold frame 12. When the product in the cavity 23 is sufficiently cooled, the temperature decreases, and the heat expansion member 214 contracts, so as to drive the limit block 213 to disengage from the limit groove 411, so that the limit block 213 no longer limits the upper abutment block 41, thereby facilitating the separation of the fixed mold base plate 21 and the movable mold frame 12.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold, characterized in that: include: A movable mold assembly (1), comprising a movable mold base plate (11), a movable mold frame (12) and a movable mold core (13), wherein the movable mold frame (12) is arranged on the movable mold base plate (11), the movable mold core (13) is embedded on a side of the movable mold frame (12) away from the movable mold base plate (11), the movable mold base plate (11) is provided with an injection port (111), the movable mold frame (12) is provided with a flow channel (121), the movable mold frame (12) is provided with a plurality of flow diversion ports (122), and the flow channel (121) is respectively connected to the injection port (111) and the plurality of flow diversion ports (122); The fixed mold assembly (2) comprises a fixed mold base plate (21) and a fixed mold core (22) embedded in the fixed mold base plate (21), a mold cavity (23) is formed between the fixed mold core (22) and the movable mold core (13), and a plurality of diversion ports (122) are respectively connected to the mold cavity (23).

2. The injection mold according to claim 1, characterized in that: A protection component (4) is provided between the fixed mold base plate (21) and the movable mold frame (12), and the protection component (4) is used to reduce the impact between the fixed mold base plate (21) and the movable mold frame (12).

3. The injection mold according to claim 2, characterized in that: The protection assembly (4) comprises an upper abutment block (41), a connection seat (42), a lower abutment block (43) and an elastic member (44); the upper abutment block (41) is arranged on a side wall of the movable mold frame (12); the connection seat (42) is arranged on the fixed mold bottom plate (21) and is arranged opposite to the upper abutment block (41); a first slide groove (421) is provided on the connection seat (42); the lower abutment block (43) is slidably inserted in the first slide groove (421); the elastic member (44) is arranged in the first slide groove (421) and is connected to the lower abutment block (43); when the fixed mold bottom plate (21) and the movable mold frame (12) are close to each other, the upper abutment block (41) is inserted in the first slide groove (421).

4. The injection mold according to claim 3, characterized in that: A limiting groove (411) is provided on the upper abutment block (41), a second sliding groove (212) is provided on the fixed mold bottom plate (21) in a horizontal direction, the second sliding groove (212) is connected to the first sliding groove (421), a limiting block (213) is slidably inserted in the second sliding groove (212), and the limiting block (213) can be inserted in the limiting groove (411).

5. The injection mold according to claim 4, characterized in that: A heat expansion component (214) is provided in the second slide groove (212); the heat expansion component (214) is connected to the limit block (213) and is located on a side of the limit block (213) close to the cavity (23).

6. The injection mold according to claim 5, characterized in that: The thermal expansion component (214) is made of phase change material.

7. The injection mold according to claim 2, characterized in that: A plurality of the protection components (4) are provided, and the plurality of protection components (4) are evenly distributed along the circumference of the fixed mold bottom plate (21).

8. The injection mold according to claim 1, characterized in that: Positioning columns (211) are arranged at four top corners of the fixed mold base plate (21), and positioning grooves (123) are provided on the movable mold frame (12). The number of the positioning grooves (123) is equal to the number of the positioning columns (211), and one positioning column (211) is inserted into one positioning groove (123).

9. The injection mold according to claim 1, characterized in that: An ejector pin assembly (3) is provided on a side of the fixed mold bottom plate (21) facing away from the fixed mold core (22), and the ejector pin assembly (3) is used to push the product out of the mold cavity (23).

10. The injection mold according to claim 9, characterized in that: The ejector assembly (3) comprises an ejector plate (31) and a plurality of ejector pins (32) arranged on the ejector plate (31); the ejector plate (31) is slidably connected to the fixed mold bottom plate (21); the ejector pins (32) penetrate the fixed mold bottom plate (21) and correspond to the mold cavity (23); and the ejector plate (31) is used to drive the ejector pins (32) to move.

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