A shrinkage compensation slider structure

Abstract

The present invention discloses a shrinkage compensation slider structure, which includes a first template and a second template that are joined together to form a molding area. When the mold is opened, the first template separates from the second template along the mold opening direction; a molding part is arranged in the molding area, and a hole is arranged on the molding part. A slider seat is arranged on the second template, and a slider is movably arranged on the slider seat. The back of the slider abuts against the side wall of the molding part, and the hole is arranged on the side wall and within the range of the back of the slider. The back of the slider and the molding area are injection molded together to form the hole; the axial direction of the hole is arranged at an angle to the mold opening direction, the moving direction of the slider is perpendicular to the mold opening direction, and an elastic member for compensating the shrinkage distance of the molding part is arranged at the bottom of the slider seat, and the compensation direction of the elastic member is consistent with the mold opening direction. The present invention is used to solve the problem that when the side wall of the product is relatively high and there is a hole at the bottom, during the mold opening process, before the slider is completely separated, the product has already shrunk, resulting in deformation or scratching of the hole.

Description

Technical Field

[0001] The present invention relates to the field of die mechanisms, and particularly to a shrinkage compensation slider structure. Background Art

[0002] The slider structure refers to a mechanism applied in a die that can obtain lateral core pulling or lateral parting and resetting actions to drag the undercuts, depressions, etc. of a product.

[0003] Currently, in the processing of injection molds, many plastic products have undercuts and cannot be normally demolded and ejected. In the prior art, a slider structure is often used, and the slider structure slides in the mold perpendicular to the mold opening and closing direction or at a certain angle to the mold opening and closing direction to solve the demolding problem of product undercuts.

[0004] During the process of core pulling and demolding a product using a slider structure, when the side wall of the product is relatively high and there are holes at the bottom, during demolding, before the slider is completely separated, the product shrinks due to the shrinkage rate of its own material, resulting in deformation or scratching of the holes on the product, leading to an increase in the defective rate of the product.

[0005] Therefore, it is necessary to research and develop a slider structure that can compensate for the distance generated by the shrinkage of the product during mold opening, so as to solve the problem that when the mold is opened, the slider is not completely separated, the product shrinks, resulting in deformation or scratching of the product holes, leading to an increase in the defective rate of the product. Summary of the Invention

[0006] The purpose of the present invention is to provide a slider structure that can compensate for the distance change generated by the shrinkage of a plastic product, so as to solve the problem that when the side wall of the product is relatively high and there are holes at the bottom, during the mold opening process, before the slider is completely separated, the product has already shrunk, resulting in deformation or scratching of the holes.

[0007] To achieve the above purpose, the present invention provides a shrinkage compensation slider structure, and the specific implementation scheme is as follows:

[0008] A shrinkage compensation slider structure includes a first template and a second template. The first template and the second template are joined together to form a molding area. When the mold is opened, the first template separates from the second template along the mold opening direction. A molding part is provided in the molding area. A hole is provided at the bottom of the molding part. A slider seat is provided on the second template. A slider that is movably connected to the slider seat is provided on the slider seat. The back of the slider abuts against the side wall of the molding part. The hole is provided on the side wall and is within the range of the back of the slider. The back of the slider and the molding area are injection-molded together to form the hole. The axis of the hole is arranged at an angle to the mold opening direction. The moving direction of the slider is perpendicular to the mold opening direction. Elastic members for compensating the shrinkage distance of the molding part are provided on both sides of the bottom of the slider seat. The top of the elastic member abuts against the bottom of the slider seat and the compensation direction of the elastic member is the same as the mold opening direction.

[0009] The slider seat under the action of the elastic member has a compensation distance, and the compensation distance is less than or equal to the shrinkage distance.

[0010] Currently, in the prior art, the slider structure is that the slider is directly installed in a groove provided on the second template. By providing a chute at the lower end of the slider and matching it with a sliding projection provided at the upper end of the groove, a spring for pushing the slider to quickly demold is provided in the groove. Thus, while the slider is demolded under the elastic action of the spring, the wear between the inclined guide post and the slider of the slider structure is reduced, ensuring the service life of the mold. However, for the shrinkage compensation slider structure of the present invention, it is aimed at the problem that when the mold of a molding part with a relatively high side wall and a hole at the bottom of the side wall is opened, the shrinkage of the molding part causes the hole position to shift, resulting in deformation or damage of the hole position. By adding a movable slider seat structure and directly providing an elastic member for compensating the shrinkage distance of the molding part at the bottom of the slider seat, during the process of mold opening, when the first template and the second template are separated, the molding part shrinks due to the shrinkage rate of its own material, causing the hole position to shrink along with the molding part. At the same time, the acting force on the elastic member when the first template and the second template are closed disappears, and the slider seat compensates for the shrinkage distance of the molding part in the mold opening direction under the spring action of the elastic member. Thus, during the shrinkage process of the molding part, the hole at the bottom of the molding part always cooperates with the back of the slider, effectively avoiding the situation where the hole position is deformed or damaged due to the shrinkage of the molding part when the slider is not completely separated.

[0011] As a further improvement of the present invention, the slider seat is provided with mounting holes, the second template is provided with a groove body, and the groove body is provided with screw holes that cooperate with the mounting holes. It further includes a fixed-distance screw that passes through the mounting holes and is screwed into the screw holes. The fixed-distance screw and the mounting holes form a compensation area for the displacement of the slider seat. By forming a compensation area for the displacement of the slider seat between the mounting holes provided on the slider seat and the fixed-distance screws passing through the mounting holes, the compensation distance of the slider seat under the action of the elastic member is limited. While ensuring that the shrinkage distance of the molded part can be compensated, it prevents the compensation distance of the slider seat from exceeding the shrinkage distance of the molded part under the action of the elastic member, thereby preventing the occurrence of hole position deformation or damage on the molded part.

[0012] Further, the distance of the compensation area is equal to the shrinkage distance of the molded part in the direction parallel to the mold opening direction. Setting the distance of the compensation area to be equal to the shrinkage distance of the molded part in the mold opening direction further ensures that the compensation distance of the slider seat under the action of the elastic member does not exceed the shrinkage distance of the molded part, preventing the compensation distance of the slider seat from exceeding the shrinkage distance of the molded part under the action of the elastic member, thereby preventing the occurrence of hole position deformation or damage on the molded part.

[0013] As a further improvement of the present invention, the included angle formed by the axial direction of the hole position and the mold opening direction is 90°.

[0014] As a further improvement of the present invention, the elastic member is a rubber spring, and the elastic coefficient of the elastic member is proportional to the shrinkage rate of the molded part. The deformation amount of the elastic member is 1.5 - 2.5 cm. Users can replace the elastic members with different elastic coefficients according to the change of the shrinkage rate of the molded part, so as to ensure that the slider seat can compensate for molded parts with different shrinkage distances and ensure the normality of the hole positions at the bottom of the molded part.

[0015] As a further improvement of the present invention, an elastic member installation groove is provided at the bottom of the groove body, and the elastic member is arranged in the elastic member installation groove. By fixing the elastic member in the elastic member installation groove, it can be avoided that due to the large elastic deformation of the elastic member itself after the mold is opened, the position of the elastic member changes during the process of returning to the non-pressure state after the slider seat performs compensatory displacement, resulting in the situation that the elastic member cannot act on the bottom of the slider seat and the second template respectively after the slider structure is reset.

[0016] As a further improvement of the present invention, a pressure strip is provided on the slider, and the pressure strip is fixedly connected to the slider seat through a fixing screw. By providing a pressure strip to press the slider tightly on the slider seat, it is avoided that the slider shakes or displaces during the mold opening process, resulting in damage to the molded part and an increase in the defective rate of the product.

[0017] As a further improvement of the present invention, a slider seat mounting groove having the same height as the slider seat is provided in the groove body, and the slider seat is arranged in the slider seat mounting groove. By arranging the slider seat in the slider seat mounting groove, the rest of the slider structure is assembled with the first template through the groove body, so that the elastic member at the bottom of the slider seat is in a compressed state under the action of the first template and the second template during mold clamping, and has an elastic acting force acting on the bottom of the slider seat.

[0018] As a further improvement of the present invention, a sliding convex edge is provided on the slider seat, a sliding groove matching with the sliding convex edge is provided at the lower end of the slider, and the sliding convex edge can be movably inserted into the sliding groove. The slider and the slider seat are movably connected through the cooperation of the sliding convex edge and the sliding groove, so that the slider can generate displacement from the slider seat during the mold opening process, thereby separating from the formed part, enabling the formed part to be smoothly demolded, and being able to be reset through the cooperation of the sliding convex edge and the sliding groove during mold clamping.

[0019] A shrinkage compensation slider structure of the present invention has the following beneficial effects compared with the prior art:

[0020] 1. A new slider seat mechanism is added, and a compensation area for the displacement of the slider seat is formed between the mounting holes provided on the slider seat and the fixed-distance screws passing through the mounting holes, thereby limiting the compensation distance of the slider seat under the action of the elastic member. While ensuring that the shrinkage distance of the formed part can be compensated, it prevents the compensation distance of the slider seat under the action of the elastic member from exceeding the shrinkage distance of the formed part, thereby avoiding the occurrence of hole deformation or scratching on the formed part, and further enhancing the use safety and service life of the slider structure and improving the qualified rate of products.

[0021] 2. The distance of the compensation area is set to be equal to the shrinkage distance of the formed part in the mold opening direction, further ensuring that the compensation distance of the slider seat under the action of the elastic member does not exceed the shrinkage distance of the formed part, preventing the compensation distance of the slider seat under the action of the elastic member from exceeding the shrinkage distance of the formed part, thereby avoiding the occurrence of hole deformation or scratching on the formed part, and further enhancing the use safety and service life of the slider structure and improving the qualified rate of products. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the shrinkage compensation slider structure of the present invention;

[0023] Figure 2 is of the present invention Figure 1 a partial enlarged view of part A;

[0024] Figure 3 is of the present invention Figure 2 a partial enlarged view of part B. Detailed implementation mode

[0025] The shrinkage compensation slider structure of the present invention will be described in conjunction with the accompanying drawings.

[0026] As Figure 1 shown, the shrinkage compensation slider structure includes a first template 1 and a second template 2. The first template 1 and the second template 2 are joined together to form a molding area. A molding part 3 is arranged in the molding area. When the mold is opened, the first template 1 is separated from the second template 2 along the mold opening direction Y.

[0027] As Figures 2-3 shown, a groove is provided on the second template 2. A slider seat 4 is arranged in the groove. A slider 6 is arranged on the slider seat 4. The slider 6 is movably connected to the slider seat 4. The back of the slider 6 abuts against the side wall of the molding part 3. A hole 31 is provided at the bottom of the molding part 3. The hole 31 is arranged on the side wall. The hole 31 is within the range of the back of the slider 6. And the back of the slider 6 and the molding area are injection molded together to form the hole 31.

[0028] Specifically, the moving direction of the slider 6 and the slider seat 4 is perpendicular to the mold opening direction Y.

[0029] Specifically, the hole 31 is injection molded by the shape on the slider 6.

[0030] Specifically, the axis of the hole 31 is arranged at an angle to the mold opening direction Y.

[0031] Further, the included angle formed by the axis of the hole 31 and the mold opening direction Y is 120° - 240°.

[0032] Wherein, an elastic member 7 is provided at the bottom of the slider seat 4. The elastic members 7 are respectively arranged on both sides of the slider seat 4.

[0033] Specifically, the elastic coefficient of the elastic member 7 is proportional to the shrinkage rate of the molding part 3; the deformation amount of the elastic member 7 is 1.5 - 2.5 cm.

[0034] Specifically, for the setting of the elastic member 7, the user can select the number, specification and force application situation according to the elastic force required for the slider seat 4 to compensate for the shrinkage distance of the hole 31 and the elastic force of the elastic member 7 itself to set the position of the elastic member 7.

[0035] Specifically, the compensation direction of the elastic member 7 is the same as the mold opening direction Y.

[0036] In this embodiment, the elastic member 7 is a rubber spring. Due to the characteristics of the rubber spring itself, an installation groove needs to be provided in the groove body for installing the elastic member 7, and it is not easy to damage the slider seat 4 during the compression and reset processes.

[0037] Among them, the slider seat 4 and the groove body are fixedly connected by a fixed-distance screw 5.

[0038] Specifically, a slider seat installation groove equal in height to the slider seat 4 is provided in the groove body. The slider seat 4 is movably arranged in the slider seat installation groove. A screw hole is provided in the groove body, and an installation hole 41 is provided on the slider seat 4. The fixed-distance screw 5 passes through the installation hole 41 and is screwed into the screw hole to fix the slider seat 4 on the second template 2.

[0039] Furthermore, the fixed-distance screw 5 and the installation hole 41 form a compensation area 42 for the displacement of the slider seat 4. The compensation area 42 formed between the installation hole 41 provided on the slider seat 4 and the fixed-distance screw 5 passing through the installation hole 41 is used to limit the compensation distance of the slider seat 4 under the action of the elastic member 7. While ensuring that the shrinkage distance of the molded part 3 can be compensated, it prevents the compensation distance of the slider seat 4 from exceeding the shrinkage distance of the molded part 3 under the action of the elastic member 7, thereby avoiding the deformation or scratching of the hole position 31 on the molded part 3.

[0040] Specifically, the compensation area 42 is equal to the shrinkage distance of the molded part 3 in the opening die direction Y. This further ensures that the compensation distance of the slider seat 4 under the action of the elastic member 7 does not exceed the shrinkage distance of the molded part 3, preventing the compensation distance of the slider seat 4 from exceeding the shrinkage distance of the molded part 3 under the action of the elastic member 7, thereby avoiding the deformation or scratching of the hole position 31 on the molded part 3.

[0041] Among them, an elastic member installation groove is provided at the bottom of the groove body. One end of the elastic member 7 is fixed in the elastic member installation groove 43, and the other end abuts against the bottom of the slider seat 4. By fixing the elastic member 7 in the elastic member installation groove, it can be avoided that after the mold is opened, due to the large elastic deformation of the elastic member 7 itself, the position of the elastic member 7 changes during the process of returning to the non-pressure state after the slider seat 4 performs compensatory displacement, resulting in the situation that after the slider structure is reset, the elastic member 7 cannot act on the bottom of the slider seat 4 and the groove body on the second template respectively.

[0042] Among them, a pressure strip 8 is provided on the slider 6. The pressure strip 8 is fixedly connected to the slider seat 4 by a fixing screw 81 to prevent the slider 6 from shaking or shifting during the mold opening process, causing damage to the molded part 3 and increasing the defective rate of the product.

[0043] Among them, a sliding convex edge is provided on the slider seat 4, and a sliding groove that can be movably matched with the sliding convex edge is provided at the lower end of the slider 6, so that the slider 4 can displace relative to the slider seat 6 during the mold opening process, thereby separating from the molded part 3, enabling the molded part 3 to be smoothly demolded, and being able to be reset through the cooperation of the sliding convex edge and the sliding groove during mold closing.

[0044] The principle of the shrinkage compensation slider structure of the present invention for compensating the shrinkage distance of the hole position 31 on the molded part 3:

[0045] First, during the mold opening process, the first template 1 moves in the mold opening direction Y and separates from the second template 2.

[0046] Then, while the first template 1 and the second template 2 are separating, the temperature of the molded part 3 decreases, causing the molded part 3 to shrink according to its own shrinkage rate, and the hole position 31 on the bottom of the molded part 3 generates a shrinkage displacement.

[0047] Finally, while the molded part 3 is shrinking, the elastic member 7 provided at the bottom of the slider seat 4 has the pressure acting on it due to the separation of the first template 1 and the second template 2 disappear, and the elastic force of the elastic deformation and reset of the elastic member 7 acts on the slider seat 4, causing the slider 6 to displace within the compensation area 42, compensating for the shrinkage distance of the hole position 31.

[0048] Specifically, the mold opening direction refers to the opening and closing movement direction of the first template 1 and the second template 2.

[0049] A shrinkage compensation slider structure of the present invention has the advantages of simple structure and long service life. It can compensate for the distance of the hole displacement caused by the shrinkage of the molded part through the elastic force of the elastic member, thereby solving the problem that when the side wall of the product is relatively high and there is a hole position at the bottom, during the mold opening process of the mold, before the slider is completely separated, the product has already shrunk, resulting in deformation or damage of the hole position.

[0050] According to the disclosure and teachings of the above specification, those skilled in the art of the present invention can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A shrinkage compensation slider structure, comprising a first template and a second template, wherein the first template and the second template are joined together to form a molding area, and when the mold is opened, the first template is separated from the second template along the mold opening direction; characterized in that, A forming member is provided in the forming area. The forming member is provided with a hole position. A slider seat is provided on the second template. A slider that is movably connected to the slider seat is provided on the slider seat. The back of the slider abuts against the side wall of the forming member. The hole position is arranged on the side wall and is within the range of the back of the slider. And the back of the slider and the forming area are cooperatively injection molded to form the hole position; the axial direction of the hole position is arranged at an angle with the mold opening direction. The moving direction of the slider is perpendicular to the mold opening direction. Elastic members for compensating the shrinkage distance of the forming member are provided on both sides of the bottom of the slider seat. The top of the elastic member abuts against the bottom of the slider seat and the compensation direction of the elastic member is the same as the mold opening direction; The slider seat under the action of the elastic member has a compensation distance, and the compensation distance is less than or equal to the shrinkage distance.

2. The shrinkage compensation slider structure according to claim 1, characterized in that, The slider seat is provided with a mounting hole. The second template is provided with a groove body. A screw hole that cooperates with the mounting hole is provided in the groove body. It further includes a fixed-distance screw that passes through the mounting hole and is screwed and connected to the screw hole. The fixed-distance screw and the mounting hole form a compensation area for the displacement of the slider seat.

3. The shrinkage compensation slider structure according to claim 2, characterized in that, The distance of the compensation area is equal to the shrinkage distance of the forming member in the mold opening direction.

4. The shrinkage compensation slider structure according to claim 1, characterized in that, The included angle formed by the axial direction of the hole position and the mold opening direction is 90°.

5. The shrinkage compensation slider structure according to claim 1, wherein, The elastic member is a rubber spring, and the elastic coefficient of the elastic member is proportional to the shrinkage rate of the forming member. The deformation amount of the elastic member is 1.5 - 2.5 cm.

6. The shrinkage compensation slider structure according to claim 2, wherein, An elastic member installation groove is provided at the bottom of the groove body. The elastic member is arranged in the elastic member installation groove.

7. The shrinkage compensation slider structure according to claim 1, wherein A pressure strip is provided on the slider. The pressure strip is fixedly connected to the slider seat through a fixing screw.

8. The shrinkage compensation slider structure according to claim 2, wherein, A slider seat installation groove with the same height as the slider seat is provided in the groove body. The slider seat is arranged in the slider seat installation groove.

9. The shrinkage compensation slider structure according to claim 1, characterized in that, A sliding convex edge is provided at the upper end of the slider seat. A sliding groove that cooperates with the sliding convex edge is provided at the bottom end of the slider. The sliding convex edge can be movably inserted into the sliding groove.

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