Injection mold

Abstract

The utility model relates to the technical field of molds, in particular to an injection mold which comprises a fixed mold plate, a movable mold plate and a demolding mechanism. Wherein a fixed mold core is arranged on the fixed mold plate; the movable mold plate and the fixed mold plate are oppositely arranged, a movable mold core is arranged on the side, close to the fixed mold plate, of the movable mold plate, the movable mold core is attached to the fixed mold core, and a forming cavity is formed between the movable mold core and the fixed mold core; the demolding mechanism comprises an ejector pin assembly and a loosening assembly, the ejector pin assembly is arranged on the movable mold plate, the loosening assembly is arranged between the fixed mold plate and the movable mold plate, one end of the loosening assembly extends into the forming cavity, and the loosening assembly is used for driving a product to move out of the forming cavity. The ejector pin assembly is used for ejecting the product out of the forming cavity. The demolding device has the effect of improving the demolding efficiency.

Description

Technical Field

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

[0002] Currently, with the iteration of products, many products require leather grain. Leather grain is a processing technology that can produce patterns and textures on the surface of plastic products. Leather grain can make the appearance of injection molded products more beautiful, increase the hand feeling, improve the texture and grade of the products. The leather grain of injection molds can also form functions such as anti-slip, scratch-resistant, and increased friction on the mold surface. In the mold, the ejector pin is a very important auxiliary forming component. After the product is injection molded in the mold, the injection molding machine can eject the product from the mold through the ejector pin. However, when the ejector pin ejects the product, it is easy to leave an ejector pin mark on the appearance surface of the product, thereby damaging the appearance surface of the product and may cause situations such as scratching the hand or inconvenient handling. Therefore, in the related art, usually, the number of ejector pins is reduced to reduce the number of ejector pin marks on the appearance surface, thereby reducing the damage of the ejector pin to the appearance surface of the product to ensure the integrity and beauty of the appearance surface.

[0003] Regarding the above related technology: when the area of the appearance surface of the product is large, reducing the ejector pins is likely to cause uneven stress on the product, resulting in situations where the product is toppled by the ejector pin or the ejector pin cannot eject the product from the mold, thereby reducing the demolding efficiency. Utility Model Content

[0004] In order to improve the demolding efficiency, the present application provides an injection mold.

[0005] An injection mold provided by the present application adopts the following technical solutions:

[0006] An injection mold, comprising:

[0007] A fixed template, on which a fixed mold core is provided;

[0008] A movable template, which is arranged opposite to the fixed template. A movable mold core is provided on the side of the movable template close to the fixed template. The movable mold core is attached to the fixed mold core, and a molding cavity is formed between the movable mold core and the fixed mold core;

[0009] A demolding mechanism, comprising an ejector pin assembly and a release assembly. The ejector pin assembly is arranged on the movable template, the release assembly is arranged between the fixed template and the movable template, one end of the release assembly extends into the molding cavity, the release assembly is used to drive the product to move out of the molding cavity, and the ejector pin assembly is used to eject the product out of the molding cavity.

[0010] By adopting the above technical solution, after the product is formed in the forming cavity, the fixed template is separated from the moving template, so that the fixed mold core is separated from the moving mold core. At this time, the loosening component drives the product to move out of the forming cavity, so that the product is loosened in the forming cavity, facilitating the ejector pin component to eject the product out of the forming cavity. Thus, through the mutual cooperation of the loosening component and the ejector pin component, it is beneficial to improve the demolding efficiency. And because when demolding, the loosening component will first loosen the product in the forming cavity, making the force required for the ejector pin component to eject the product out of the forming cavity smaller. Furthermore, it is beneficial to reduce the possibility of ejector pin marks left on the appearance surface of the product by the ejector pin component, ensuring the integrity and beauty of the product appearance surface to a certain extent.

[0011] Optionally, the loosening component includes an inclined guide pillar, a slider seat and a slider. The inclined guide pillar is arranged on the fixed template. The slider seat is slidably arranged between the fixed template and the moving template. A guide hole is formed on the slider seat. One end of the inclined guide pillar is slidably inserted into the guide hole. The slider is connected to the slider seat. The end of the slider away from the slider seat extends into the forming cavity. When the fixed template drives the inclined guide pillar to move away from the moving template, the inclined guide pillar can drive the slider seat to move away from the forming cavity.

[0012] By adopting the above technical solution, when the fixed template moves away from the moving template, the fixed template drives the inclined guide pillar to move. The inclined guide pillar can move in the guide hole to drive the slider seat to move away from the forming cavity. The slider seat drives the slider to move out of the forming cavity, so that the adhesion force and frictional force received by the product in the forming cavity are reduced, facilitating the ejector pin component to eject the product out of the forming cavity, and further being beneficial to improving the demolding efficiency.

[0013] Optionally, the loosening component includes a support plate and an elastic member. A receiving groove is formed on the moving template. The support plate is arranged on the moving template. The elastic member is arranged in the receiving groove and connected to the support plate. The slider seat is slidably arranged on the support plate. When the fixed template moves away from the moving template, the elastic member can push the support plate to move away from the moving template.

[0014] By adopting the above technical solution, when the fixed template moves away from the moving template, the fixed template no longer applies pressure to the support plate through the slider seat, enabling the elastic member to push the support plate to move away from the moving template. The support plate drives the slider seat and the slider to move, so that the slider can drive the product to move in the forming cavity, thus facilitating the loosening of the product in the forming cavity. During this process, the inclined guide pillar can drive the slider to move out of the forming cavity through the slider seat, further reducing the adhesion force and frictional force received by the product in the forming cavity, and further facilitating the ejector pin component to eject the product out of the forming cavity.

[0015] Optionally, a limiting groove is formed on one side of the movable template facing away from the fixed template. The limiting groove communicates with the accommodating groove. A first limiting member is inserted through the limiting groove. One end of the first limiting member passes through the accommodating groove and is connected to the support plate. The first limiting member is used for limiting the support plate.

[0016] By adopting the above technical solution, the first limiting member can limit the support plate, which is beneficial to reducing the possibility that the elastic member pushes the support plate away from the movable template.

[0017] Optionally, a second limiting member is arranged on the support plate. The second limiting member is located on the side of the slider seat away from the molding cavity. The second limiting member is used for limiting the slider seat.

[0018] By adopting the above technical solution, after the inclined guide post drives the slider seat to move a certain distance away from the molding cavity, the second limiting member can contact the slider seat, which is convenient for using the second limiting member to limit the slider seat, so that the slider seat stops moving, and further is beneficial to ensuring the consistency and accuracy during product demolding.

[0019] Optionally, a guide post is arranged on the support plate, and a guide sleeve is arranged on the movable template. The guide post is slidably inserted into the guide sleeve.

[0020] By adopting the above technical solution, when the support plate moves, the support plate can drive the guide post to move, so that the guide post moves in the guide sleeve, and thus the guide sleeve can guide the support plate through the guide post to reduce the possibility of the support plate deviating during the movement process.

[0021] Optionally, two sets of release assemblies are provided. The two sets of release assemblies are oppositely arranged between the fixed template and the movable template.

[0022] By adopting the above technical solution, the two sets of release assemblies cooperate with each other and can apply forces to the product relatively evenly, which is beneficial to improving the stability of the product during the demolding process.

[0023] Optionally, the release assembly includes a slider bundle block. The slider bundle block is arranged on the fixed template and is close to the slider seat. A wear-resistant sheet is arranged on the side of the slider bundle block close to the slider seat. The side of the wear-resistant sheet away from the slider bundle block contacts the slider seat.

[0024] By adopting the above technical solution, the side of the wear-resistant piece away from the slider bundle block abuts against the slider seat, enabling the slider bundle block to limit the slider seat through the wear-resistant piece, thereby facilitating the reduction of the possibility of displacement of the slider seat under pressure during the injection molding process. And when the slider seat moves, the wear-resistant piece will slide relative to the slider seat. On the one hand, this is conducive to positioning the slider seat, enabling the slider seat to move along a predetermined trajectory and reducing the possibility of vibration of the slider seat during the demolding process. On the other hand, it is conducive to reducing the wear between the slider seat and the slider bundle block to extend the mold life.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Through the mutual cooperation of the ejector pin assembly and the release assembly, during the demolding process, the release assembly can first be used to loosen the product in the molding cavity, and then the ejector pin assembly can be used to eject the product out of the molding cavity, which is conducive to improving the demolding efficiency and making the force required for the ejector pin assembly to eject the product out of the molding cavity smaller. Furthermore, it is conducive to reducing the possibility of ejector pin marks left on the appearance surface of the product by the ejector pin assembly;

[0027] 2. Through the mutual cooperation of the fixed template, the moving template, the inclined guide post, the slider seat, the slider, the support plate and the elastic member, when the fixed template moves away from the moving template, the elastic member can push the support plate to move, and the support plate can drive the slider seat and the slider to move, so as to use the slider to drive the product to move away from the moving template, making the product loose in the molding cavity. And during this process, the slider seat can drive the slider to move out of the molding cavity, thereby reducing the adhesion force and frictional force received by the product in the molding cavity, and then facilitating the ejector pin assembly to eject the product out of the molding cavity to improve the demolding efficiency;

[0028] 3. The setting of the second limiting member enables the second limiting member to limit the slider seat after the slider seat moves a certain distance away from the molding cavity, so that the slider seat stops moving, which is conducive to ensuring the consistency and accuracy during product demolding. Description of the Drawings

[0029] Figure 1 is a schematic diagram of the overall structure of an injection mold in an embodiment of the present application.

[0030] Figure 2 is an exploded structure diagram of an injection mold in an embodiment of the present application.

[0031] Figure 3 is a structural diagram of the moving template and the release assembly in an embodiment of the present application.

[0032] Figure 4 is a front view of an injection mold in an embodiment of the present application.

[0033] Figure 5 is a sectional view taken along Figure 4 the A-A line in

[0034] Figure 6 and is a side view of an injection mold in an embodiment of the present application.

[0035] Figure 7 is a sectional view taken along Figure 6 the B-B line in

[0036] Explanation of reference numerals:

[0037] 1. Fixed template; 11. Fixed mold core; 12. Injection port; 2. Movable template; 21. Movable mold core; 22. Molding cavity; 23. Accommodating groove; 24. Limiting groove; 25. Guide bushing; 3. Demolding mechanism; 31. Ejector pin assembly; 311. Ejector pin; 32. Loosening assembly; 321. Support plate; 3211. First limiting member; 3212. Guide post; 3213. Second limiting member; 322. Elastic member; 323. Angled guide post; 324. Slide block seat; 3241. Guide hole; 325. Slide block; 326. Slide block binding block; 3261. Wear-resistant plate. Detailed implementation manners

[0038] The following further describes the present application in detail with reference to the Figures 1-7 accompanying drawings.

[0039] An embodiment of the present application discloses an injection mold.

[0040] It should be noted that in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model.

[0041] Referring to Figure 1 and Figure 2 , the injection mold includes a fixed template 1, a movable template 2 and a demolding mechanism 3. Among them, a fixed mold core 11 is installed on the fixed template 1, the movable template 2 is disposed opposite to the fixed template 1, and a movable mold core 21 is installed on the side of the movable template 2 close to the fixed template 1. A molding cavity 22 is formed between the movable mold core 21 and the fixed mold core 11 (refer to Figure 3 ). The demolding mechanism 3 is installed between the fixed template 1 and the movable template 2, and the demolding mechanism 3 is used to take out the molded product from the molding cavity 22, thereby improving the demolding efficiency.

[0042] Reference Figure 2 and Figure 3 The fixed mold plate 1 is provided with an injection port 12, which is connected to the molding cavity 22. When the fixed mold plate 1 and the movable mold plate 2 are in a mold-closing state, the movable mold core 21 fits with the fixed mold core 11 to close the molding cavity 22. The injection material can enter the molding cavity 22 through the injection port 12, so as to realize the injection molding of the product.

[0043] Reference Figure 2 The demoulding mechanism 3 includes an ejector assembly 31 and a release assembly 32. The ejector assembly 31 includes a plurality of ejector pins 311, which are all slidably disposed on the movable plate 2 and located on a side of the movable plate 2 away from the fixed plate 1.

[0044] Reference Figure 2 and Figure 3 When the product needs to be taken out of the molding cavity 22, the multiple ejector pins 311 cooperate with each other and can enter the molding cavity 22, so that the multiple ejector pins 311 can be used to eject the product out of the molding cavity 22, thereby realizing demolding of the product.

[0045] It should be noted that, in the embodiment of the present application, how to drive the ejector pin 311 to work is a conventional technical means for those skilled in the art, and therefore will not be described in detail in the embodiment of the present application.

[0046] Reference Figure 4 and Figure 5 The loosening component 32 is arranged between the fixed template 1 and the movable template 2, and one end of the loosening component 32 extends into the molding cavity 22. The loosening component 32 is used to apply a force to the product in the molding cavity 22 to loosen the product in the molding cavity 22.

[0047] In this embodiment, two groups of loosening components 32 are provided, and the two groups of loosening components 32 are arranged opposite to each other, so that through the mutual cooperation of the two groups of loosening components 32, a relatively uniform force can be applied to the product, which is beneficial to improve the stability of the product during the demolding process.

[0048] Reference Figure 5 and Figure 6 The release assembly 32 includes a support plate 321, an elastic member 322 (refer to Figure 7 ), inclined guide column 323, slider seat 324, slider 325 and slider bundle block 326. Among them, the support plate 321 is arranged between the movable template 2 and the fixed template 1, and the side of the support plate 321 close to the movable template 2 is connected to the first limit member 3211 (refer to Figure 7 In this embodiment, the first position limiting member 3211 (refer to Figure 7 ) is the limit bolt.

[0049] Reference Figure 7, a receiving groove 23 is formed on the movable template 2, and a limiting groove 24 is formed on the side of the movable template 2 facing away from the fixed template 1. The limiting groove 24 communicates with the receiving groove 23, and the shape of the limiting groove 24 is designed to match the shape of the first limiting member 3211. One end of the first limiting member 3211 away from the support plate 321 passes through the receiving groove 23 and is inserted into the limiting groove 24, so as to facilitate the use of the first limiting member 3211 to limit the support plate 321.

[0050] The elastic member 322 is arranged in the receiving groove 23 and connected to the support plate 321, and the elastic member 322 is sleeved on the first limiting member 3211. In this embodiment, the elastic member 322 is a spring, so as to facilitate the use of the elastic member 322 to push the support plate 321 to move away from the movable template 2.

[0051] When the fixed template 1 and the movable template 2 are in the mold-closing state, the fixed template 1 can apply pressure to the support plate 321, so that the support plate 321 applies pressure to the elastic member 322 to compress the elastic member 322. And when the fixed template 1 moves away from the movable template 2, the support plate 321 no longer receives the pressure from the fixed template 1, so that the elastic member 322 can push the support plate 321 to move away from the movable template 2. At this time, the first limiting member 3211 limits the support plate 321 to control the moving distance of the support plate 321, so that the support plate 321 is not easily separated from the movable template 2. In this embodiment, the moving distance of the support plate 321 is 1 mm.

[0052] Refer to Figure 7 , a guide post 3212 is fixedly connected to the side of the support plate 321 close to the movable template 2. A guide sleeve 25 is fixedly connected to the movable template 2, and the guide post 3212 is slidably inserted into the guide sleeve 25. When the support plate 321 moves, the support plate 321 can drive the guide post 3212 to move, so that the guide post 3212 moves in the guide sleeve 25, so that the guide sleeve 25 can guide the support plate 321 through the guide post 3212 to reduce the possibility of the support plate 321 shifting during the movement.

[0053] Refer to Figure 5 , a slider seat 324 is slidably arranged on the support plate 321 and is located on the side of the support plate 321 facing away from the movable template 2, and a guide hole 3241 is formed in the slider seat 324. The inclined guide post 323 is installed on the fixed template 1 and is inclined away from the fixed mold core 11, and one end of the inclined guide post 323 is slidably inserted into the guide hole 3241. Thus, when the fixed template 1 drives the inclined guide post 323 to move away from the movable template 2, the inclined guide post 323 can move in the guide hole 3241 to drive the slider seat 324 to move away from the movable mold core 21.

[0054] Refer to Figure 5 and Figure 7The slider 325 is fixedly connected to the slider seat 324, and the end of the slider 325 away from the slider seat 324 extends into the molding cavity 22. When the fixed mold plate 1 moves in the direction away from the movable mold plate 2, the elastic member 322 can push the support plate 321 to move in the direction away from the movable mold plate 2, and the support plate 321 drives the slider seat 324 and the slider 325 to move, so that the slider 325 can drive the product to move in the molding cavity 22, thereby facilitating the product to be loosened in the molding cavity 22. In this process, the inclined guide column 323 can drive the slider 325 to move out of the molding cavity 22 through the slider seat 324 to reduce the adhesion and friction of the product in the molding cavity 22, thereby facilitating the ejector pin 311 (refer to Figure 2 ) ejects the product from the molding cavity 22.

[0055] Reference Figure 5 A second stopper 3213 is mounted on the support plate 321, and the second stopper 3213 is located on a side of the slider seat 324 away from the movable mold core 21. In this embodiment, the second stopper 3213 is a stopper screw, and one end of the second stopper 3213 extends above the support plate 321.

[0056] When the inclined guide column 323 drives the slider seat 324 to move a certain distance away from the movable mold core 21, the second limit member 3213 can interfere with the slider seat 324, so that the slider seat 324 can be limited by the second limit member 3213 to stop the slider seat 324 from moving, which is beneficial to ensure the consistency and accuracy of the product during demolding.

[0057] Reference Figure 5 The slider block 326 is fixedly connected to the fixed mold plate 1 and is arranged close to the slider seat 324. A wear-resistant sheet 3261 is installed on the side of the slider block 326 close to the slider seat 324, and the side of the wear-resistant sheet 3261 away from the slider block 326 contacts the slider seat 324, so that the slider block 326 can limit the slider seat 324 through the wear-resistant sheet 3261 to reduce the possibility of displacement of the slider seat 324 caused by pressure on the slider 325 during the injection molding process.

[0058] When the slider seat 324 moves, the wear-resistant sheet 3261 will slide relative to the slider seat 324, which is helpful for positioning the slider seat 324 so that the slider seat 324 can move along a predetermined trajectory and reduce the possibility of vibration of the slider seat 324 during demolding. On the other hand, it is helpful to reduce the wear between the slider seat 324 and the slider block 326 to extend the life of the mold.

[0059] The implementation principle of an injection mold in an embodiment of the present application is as follows: When it is necessary to demold a product, first move the fixed template 1 away from the moving template 2. The fixed template 1 drives the fixed mold core 11 to move, so that the elastic member 322 pushes the support plate 321 to move. The support plate 321 drives the slider seat 324 and the slider 325 to move, so that the slider 325 drives the product to move upward in the molding cavity 22, thereby loosening the product in the molding cavity 22. At the same time, the fixed template 1 drives the inclined guide post 323 to move. The inclined guide post 323 drives the slider 325 to move away from the moving mold core 21 through the slider seat 324, so that the slider 325 disengages from the molding cavity 22. Finally, the ejector pin 311 is used to eject the product from the molding cavity 22 to achieve demolding of the product.

[0060] In this embodiment, first, the slider 325 is used to loosen the product in the molding cavity 22, and then the ejector pin 311 is used to eject the product from the molding cavity 22. Thus, on the one hand, the number of required ejector pins 311 can be reduced, and the force required to eject the product by the ejector pin 311 can be smaller, so as to ensure the integrity and beauty of the appearance surface of the product. On the other hand, the ejector pin 311 can stably eject the product from the molding cavity 22 to ensure that the demolding efficiency will not be reduced.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An injection mold, characterized in that: include: A fixed mold plate (1), wherein a fixed mold core (11) is provided on the fixed mold plate (1); A movable die plate (2) is arranged opposite to the fixed die plate (1); a movable die core (21) is arranged on a side of the movable die plate (2) close to the fixed die plate (1); the movable die core (21) is fitted with the fixed die core (11); a molding cavity (22) is formed between the movable die core (21) and the fixed die core (11); The demoulding mechanism (3) comprises an ejector assembly (31) and a loosening assembly (32), wherein the ejector assembly (31) is arranged on the movable mold plate (2), and the loosening assembly (32) is arranged between the fixed mold plate (1) and the movable mold plate (2), and one end of the loosening assembly (32) extends into the molding cavity (22), the loosening assembly (32) is used to drive the product to move out of the molding cavity (22), and the ejector assembly (31) is used to eject the product out of the molding cavity (22).

2. The injection mold according to claim 1, characterized in that: The release assembly (32) comprises an inclined guide column (323), a slider seat (324) and a slider (325); the inclined guide column (323) is arranged on the fixed template (1); the slider seat (324) is slidably arranged between the fixed template (1) and the movable template (2); a guide hole (3241) is provided on the slider seat (324); one end of the inclined guide column (323) is slidably inserted into the guide hole (3241); the slider (325) is connected to the slider seat (324); one end of the slider (325) away from the slider seat (324) extends into the molding cavity (22); when the fixed template (1) drives the inclined guide column (323) to move in a direction away from the movable template (2), the inclined guide column (323) can drive the slider seat (324) to move in a direction away from the molding cavity (22).

3. The injection mold according to claim 2, characterized in that: The loosening assembly (32) comprises a support plate (321) and an elastic member (322); a receiving groove (23) is provided on the movable plate (2); the support plate (321) is arranged on the movable plate (2); the elastic member (322) is arranged in the receiving groove (23) and is connected to the support plate (321); the slider seat (324) is slidably arranged on the support plate (321); when the fixed plate (1) moves in a direction away from the movable plate (2), the elastic member (322) can push the support plate (321) to move in a direction away from the movable plate (2).

4. The injection mold according to claim 3, characterized in that: A limiting groove (24) is provided on a side of the movable platen (2) facing away from the fixed platen (1); the limiting groove (24) is communicated with the accommodating groove (23); a first limiting member (3211) is inserted into the limiting groove (24); one end of the first limiting member (3211) passes through the accommodating groove (23) and is connected to the support plate (321); the first limiting member (3211) is used to limit the support plate (321).

5. The injection mold according to claim 3, characterized in that: A second limiting member (3213) is provided on the support plate (321), the second limiting member (3213) being located on a side of the slider seat (324) away from the molding cavity (22), the second limiting member (3213) being used to limit the slider seat (324).

6. The injection mold according to claim 3, characterized in that: A guide column (3212) is provided on the support plate (321), a guide sleeve (25) is provided on the movable template (2), and the guide column (3212) is slidably inserted in the guide sleeve (25).

7. The injection mold according to claim 2, characterized in that: The loosening components (32) are provided in two groups, and the two groups of the loosening components (32) are arranged relatively between the fixed mold plate (1) and the movable mold plate (2).

8. The injection mold according to claim 2, characterized in that: The loosening assembly (32) comprises a slider block (326), wherein the slider block (326) is arranged on the fixed template (1) and close to the slider seat (324), a wear-resistant sheet (3261) is arranged on a side of the slider block (326) close to the slider seat (324), and a side of the wear-resistant sheet (3261) away from the slider block (326) abuts against the slider seat (324).

Images