Multi-layer sliding block core-pulling structure of plastic turnover box injection mold

Abstract

The utility model provides a multi-layer sliding block core-pulling structure of a plastic turnover box injection mold, and belongs to the technical field of molds. The mold comprises an upper mold plate and a lower mold plate, a middle insert with a rectangular section is arranged on the lower mold plate, and a multi-layer sliding block core-pulling mechanism is further arranged between the upper mold plate and the lower mold plate. The second side core-pulling assembly arranged on the side insert can drive the long toothed plate to move in the direction away from the forming cavity, the first side core-pulling assembly can drive the side insert and the short toothed plate structure on the side insert to move in the direction away from the forming cavity, and when the side insert moves, the second side core-pulling assembly and the long toothed plate can synchronously move. The stroke required by the second side core-pulling assembly can be shortened by utilizing the first side core-pulling assembly for core pulling of the long toothed plate, so that when the mold works, the second side core-pulling assembly can be arranged in the mold to reduce the space requirement when the mold works.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a multi-layer slider core-pulling structure of an injection mold for a plastic turnover box. Background Art

[0002] Plastic turnover boxes are generally molded by mold injection molding. The plastic turnover boxes are mostly equipped with a four-slider core-pulling structure, which uses the driving slider and oblique guide structure provided on the upper template to drive the side insert to pull the core. This structure eliminates the need for an external driver during injection molding and can reduce the space requirement when the mold is working. However, when a longer tooth plate is provided on the side insert, the working stroke of the driving slider and the oblique guide structure cannot meet the core-pulling movement requirements of the long tooth plate. Therefore, a long-stroke driver needs to be provided on the outside of the mold to drive the long tooth plate to pull the core. However, this increases the demand for external space when the mold is working.

[0003] For example, a Chinese patent discloses an assembled molding mold for a plastic bottle turnover box [application number: 201720441519.2], which includes an upper and lower mold plate, a cavity plate is installed under the upper mold plate, a cavity insert is installed in the cavity plate, a core bottom plate is installed on the lower mold plate, a core plate and a core insert are arranged on the core bottom plate, the core plate includes a front core plate, a rear core plate, a left core plate and a right core plate, the core insert includes an insert base and an insert core body, the insert core body is assembled on the insert base, the front core plate, the rear core plate, the left core plate and the right core plate are surrounded by the insert base and the insert core body, and cooperate with the cavity insert to form a mold cavity, the turnover box is injection molded in the mold cavity, and the front core plate, the rear core plate, the left core plate and the right core plate are each provided with an outer sliding demolding mechanism and a linkage mechanism. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a multi-layer slider core-pulling structure for an injection mold of a plastic turnover box.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multi-layer slider core-pulling structure of a plastic turnover box injection mold, comprising an upper template and a lower template, wherein the lower template is provided with a middle insert with a rectangular cross-section, and a multi-layer slider core-pulling mechanism is further provided between the upper template and the lower template, wherein the multi-layer slider core-pulling mechanism comprises four side inserts arranged on the lower template and having a rectangular cross-section, and a No. 1 side core-pulling assembly connected to the side insert is provided on the bottom of the upper template, and the upper template, the middle insert and the four side inserts are combined to form a molding cavity, and a short tooth plate structure connected to the molding cavity is provided on the top of the inner side wall of the side insert, and the upper side of the side insert is slidably matched with a long tooth plate with an inner end inserted into the molding cavity, and a No. 2 side core-pulling assembly connected to the long tooth plate is further provided on the side insert.

[0007] In the above-mentioned multi-layer slider core pulling structure of the plastic turnover box injection mold, the short tooth plate structure includes two short tooth plates symmetrically arranged on both sides of the inner wall of the side insert, the length of the short tooth plate in the direction perpendicular to the inner end face of the side insert is shorter than the length of the long tooth plate in the direction perpendicular to the inner end face of the side insert, and the inner end of the short tooth plate is inserted into the molding cavity.

[0008] In the above-mentioned multi-layer slider core pulling structure of the plastic turnover box injection mold, the No. 1 side core pulling assembly includes two driving blocks fixed to the bottom of the upper mold plate, and the two driving blocks are arranged on both sides of the side insert and connected to the outer wall of the side insert through an inclined guide structure.

[0009] In the above-mentioned multi-layer slider core pulling structure of the plastic turnover box injection mold, the oblique guide structure includes a guide groove obliquely arranged on the outer wall of the side insert and a guide slider fixed on the driving block. The cross-sections of the guide slider and the guide groove are both T-shaped and the guide slider is inserted into the guide groove.

[0010] In the above-mentioned multi-layer slider core pulling structure of the plastic turnover box injection mold, the No. 2 side core pulling assembly includes a translation driver fixed to the top of the outer wall of the side insert, and the translation driver is arranged between the two driving blocks, and the output shaft end of the translation driver is connected to the outer end of the long tooth plate.

[0011] In the above-mentioned multi-layer slider core-pulling structure of the plastic turnover box injection mold, one or two translation drivers are provided.

[0012] In the above-mentioned multi-layer slider core pulling structure of the plastic turnover box injection mold, the output shaft end of the translation drive is fixedly connected with a connecting head with a T-shaped cross-section, and the outer end of the long tooth plate is provided with a connecting groove with a T-shaped cross-section corresponding to the connecting head, and the connecting groove is set up and down.

[0013] In the above-mentioned multi-layer slider core-pulling structure of the plastic turnover box injection mold, a built-in lifting mechanism is also provided between the upper mold plate and the lower mold plate.

[0014] In the above-mentioned multi-layer slider core pulling structure of the plastic turnover box injection mold, the built-in lifting mechanism includes four lifting chambers distributed in a rectangular shape between the upper template and the lower template, the lifting chamber is located between two adjacent side inserts and the lifting chamber is open on the side away from the side insert, each lifting chamber is provided with a lifting drive fixedly connected to the upper template and a connecting seat connected to the lower template, and the output shaft end of the lifting drive is connected to the connecting seat.

[0015] In the above-mentioned multi-layer slider core-pulling structure of the plastic turnover box injection mold, an injection liquid diverter plate is also provided on the upper side of the lower mold plate, and six injection tubes whose bottom ends are connected to the molding cavity are fixedly connected to the bottom of the injection liquid diverter plate.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The No. 2 side core pulling assembly arranged on the side insert can drive the long tooth plate to move away from the molding cavity, and the No. 1 side core pulling assembly can drive the side insert and the short tooth plate structure on the side insert to move away from the molding cavity. When the side insert moves, the No. 2 side core pulling assembly and the long tooth plate can move synchronously. The core pulling of the long tooth plate formed by the No. 1 side core pulling assembly can shorten the stroke required by the No. 2 side core pulling assembly, so that the No. 2 side core pulling assembly can be arranged inside the mold when the mold is working to reduce the space requirement when the mold is working.

[0018] 2. When the mold is opened, the upper mold plate moves upward to drive the driving block to move vertically upward, and the driving block moves vertically upward to drive the guide slider to move vertically upward. The guide slider moves vertically upward and cooperates with the guide groove on the side insert to drive the side insert to move away from the molding cavity.

[0019] 3. The translation driver can drive the long tooth plate to translate toward or away from the molding cavity. Since the translation driver is fixed on the side insert, the movement of the side insert can drive the translation driver and the long tooth plate to move. The movement of the side insert means that the translation driver can shorten the stroke.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0022] Figure 2 It is a cross-sectional view of the utility model;

[0023] Figure 3 It is a partial structural schematic diagram of the utility model;

[0024] Figure 4 It is a structural diagram of the lower template.

[0025] In the figure, an upper template 1, a lower template 2, a middle insert 3, a multi-layer slider core pulling mechanism 4, a side insert 5, a molding cavity 6, a long tooth plate 7, a short tooth plate 8, a drive block 9, a guide slide 10, a guide slider 11, a translation driver 12, a connector 13, a built-in lifting mechanism 14, a lifting chamber 15, a lifting driver 16, a connecting seat 17, an injection liquid diverter plate 18, and an injection tube 19. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 4As shown, a multi-layer slider core-pulling structure of a plastic turnover box injection mold comprises an upper template 1 and a lower template 2, wherein the lower template 2 is provided with a middle insert 3 with a rectangular cross-section, and a multi-layer slider core-pulling mechanism 4 is further provided between the upper template 1 and the lower template 2, wherein the multi-layer slider core-pulling mechanism 4 comprises four side inserts 5 which are arranged on the lower template 2 and are in a rectangular shape, and a No. 1 side core-pulling assembly connected to the side insert 5 is provided on the bottom of the upper template 1, and the upper template 1, the middle insert 3 and the four side inserts 5 are combined to form a molding cavity 6, and a short tooth plate structure connected to the molding cavity 6 is provided on the top of the inner side wall of the side insert 5, and the upper side of the side insert 5 is slidably matched with a long tooth plate 7 whose inner end is inserted into the molding cavity 6, and a No. 2 side core-pulling assembly connected to the long tooth plate 7 is further provided on the side insert 5.

[0027] In the utility model, the No. 2 side core pulling assembly arranged on the side insert 5 can drive the long tooth plate 7 to move away from the molding cavity, and the No. 1 side core pulling assembly can drive the side insert 5 and the short tooth plate structure on the side insert to move away from the molding cavity. When the side insert moves, the No. 2 side core pulling assembly and the long tooth plate can move synchronously. The core pulling of the long tooth plate formed by the No. 1 side core pulling assembly can shorten the stroke required by the No. 2 side core pulling assembly, so that the No. 2 side core pulling assembly can be arranged inside the mold when the mold is working to reduce the space requirement when the mold is working.

[0028] Specifically, the short tooth plate structure includes two short tooth plates 8 symmetrically arranged on both sides of the inner wall of the side insert 5. The length of the short tooth plate 8 in the direction perpendicular to the inner end surface of the side insert 5 is shorter than the length of the long tooth plate 7 in the direction perpendicular to the inner end surface of the side insert 5. The inner end of the short tooth plate 8 is inserted into the molding cavity 6.

[0029] Specifically, the No. 1 side core pulling assembly includes two driving blocks 9 fixed to the bottom of the upper mold plate 1. The two driving blocks 9 are arranged on both sides of the side insert block 5 and connected to the outer wall of the side insert block 5 through an oblique guide structure. The oblique guide structure includes a guide slide 10 obliquely arranged on the outer wall of the side insert block 5 and a guide slider 11 fixed to the driving block 9. The cross-sections of the guide slider 11 and the guide slide 10 are both T-shaped and the guide slider 11 is inserted into the guide slide 10. When the mold is opened, the upper mold plate moves upward to drive the driving block to move vertically upward, and the driving block moves vertically upward to drive the guide slider to move vertically upward. The guide slider moves vertically upward in coordination with the guide slide on the side insert block to drive the side insert block to move away from the molding cavity.

[0030] Specifically, the second side core pulling assembly includes a translation driver 12 fixed to the top of the outer side wall of the side insert 5, the translation driver 12 is arranged between the two driving blocks 9, and the output shaft end of the translation driver 12 is connected to the outer end of the long tooth plate 7. The translation driver can drive the long tooth plate 7 to translate toward or away from the molding cavity. Since the translation driver is fixed to the side insert, the translation driver and the long tooth plate can be driven to move when the side insert moves. The movement of the side insert is formed by shortening the stroke of the translation driver.

[0031] Those skilled in the art should understand that the translation driver may be an oil cylinder, an air cylinder or a linear motor, etc.

[0032] Preferably, one or two translation drivers 12 are provided, and a connector 13 with a T-shaped cross section is fixedly connected to the output shaft end of the translation driver 12, and a connecting groove with a T-shaped cross section corresponding to the connector 13 is provided at the outer end of the long tooth plate 7, and the connecting groove is provided through the upper and lower parts. The translation driver 12 is connected to the long tooth plate through the connector and the connecting groove, which can be easily disassembled.

[0033] Specifically, a built-in lifting mechanism 14 is provided between the upper template 1 and the lower template 2. The built-in lifting mechanism 14 includes four lifting chambers 15 distributed in a rectangular shape between the upper template 1 and the lower template 2. The lifting chamber 15 is located between two adjacent side inserts 5 and the lifting chamber 15 is open on the side away from the side insert 5. The open lifting chamber can facilitate heat dissipation. Each lifting chamber 15 is provided with a lifting drive 16 fixedly connected to the upper template 1 and a connecting seat 17 connected to the lower template 2. The output shaft end of the lifting drive 16 is connected to the connecting seat 17. The lifting drive can drive the upper template to move vertically upward. Setting the lifting drive in the lifting chamber can reduce the space requirement when the mold is working.

[0034] Those skilled in the art should understand that the lifting drive may be an oil cylinder, an air cylinder or a linear motor, etc.

[0035] Specifically, an injection liquid diverter plate 18 is also provided on the upper side of the lower template 2, and six injection tubes 19 whose bottom ends are connected to the molding cavity 6 are fixedly connected to the bottom of the injection liquid diverter plate 18. The injection liquid can be diverted through the injection liquid diverter plate and injected into the molding cavity through the six injection tubes, which can improve the injection efficiency.

[0036] The working principle of the utility model is as follows: the No. 2 side core pulling assembly arranged on the side insert 5 can drive the long tooth plate 7 to move away from the molding cavity, the No. 1 side core pulling assembly can drive the side insert 5 and the short tooth plate structure on the side insert to move away from the molding cavity, and when the side insert moves, the No. 2 side core pulling assembly and the long tooth plate can move synchronously, and the core pulling of the long tooth plate formed by the No. 1 side core pulling assembly can shorten the stroke required by the No. 2 side core pulling assembly, so that the No. 2 side core pulling assembly can be arranged inside the mold when the mold is working to reduce the space requirement when the mold is working;

[0037] When the mold is opened, the upper mold plate moves upward to drive the driving block to move vertically upward, and the driving block moves vertically upward to drive the guide slider to move vertically upward. The guide slider moves vertically upward and cooperates with the guide slot on the side insert to drive the side insert to move away from the molding cavity. The translation driver can drive the long tooth plate 7 to move toward or away from the molding cavity. Since the translation driver is fixed on the side insert, the side insert can drive the translation driver and the long tooth plate to move when it moves. The movement of the side insert is formed by the translation driver to shorten the stroke. The translation driver 12 is connected to the long tooth plate through the connector and the connecting slot, which can be easily disassembled.

[0038] The jacking drive can drive the upper template to move vertically upward. Placing the jacking drive in the jacking chamber can reduce the space requirement when the mold is working. The injection liquid can be diverted through the injection liquid diverter plate and injected into the molding cavity through six injection tubes, which can improve the injection efficiency.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] Although this article uses the upper template 1, lower template 2, middle insert 3, multi-layer slider core pulling mechanism 4, side insert 5, molding cavity 6, long tooth plate 7, short tooth plate 8, drive block 9, guide slide 10, guide slider 11, translation drive 12, connector 13, built-in lifting mechanism 14, lifting chamber 15, lifting drive 16, connecting seat 17, injection liquid diverter plate 18, injection tube 19, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A multi-layer slider core-pulling structure for a plastic turnover box injection mold, comprising an upper mold plate (1) and a lower mold plate (2), characterized in that: The lower template (2) is provided with a middle insert (3) with a rectangular cross-section, and a multi-layer slider core-pulling mechanism (4) is also provided between the upper template (1) and the lower template (2). The multi-layer slider core-pulling mechanism (4) includes four side inserts (5) arranged on the lower template (2) and enclosed in a rectangular shape. The upper bottom of the upper template (1) is provided with a No. 1 side core-pulling assembly connected to the side insert (5). The upper template (1), the middle insert (3) and the four side inserts (5) are combined to form a molding cavity (6). The top of the inner wall of the side insert (5) is provided with a short tooth plate structure connected to the molding cavity (6). The upper side of the side insert (5) is slidably matched with a long tooth plate (7) whose inner end is inserted into the molding cavity (6), and the side insert (5) is also provided with a No. 2 side core-pulling assembly connected to the long tooth plate (7).

2. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 1 is characterized in that: The short tooth plate structure comprises two short tooth plates (8) symmetrically arranged on both sides of the inner wall of the side insert (5); the length of the short tooth plate (8) in a direction perpendicular to the inner end surface of the side insert (5) is shorter than the length of the long tooth plate (7) in a direction perpendicular to the inner end surface of the side insert (5); the inner end of the short tooth plate (8) is inserted into the molding cavity (6).

3. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 2 is characterized in that: The No. 1 side core pulling assembly comprises two driving blocks (9) fixed to the bottom of the upper template (1); the two driving blocks (9) are arranged on both sides of the side insert block (5) and are connected to the outer side wall of the side insert block (5) through an oblique guide structure.

4. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 3 is characterized in that: The oblique guide structure comprises a guide slot (10) obliquely arranged on the outer wall of the side panel (5) and a guide slider (11) fixed on the driving block (9); the cross-sections of the guide slider (11) and the guide slot (10) are both T-shaped, and the guide slider (11) is inserted into the guide slot (10).

5. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 3 is characterized in that: The second side core pulling assembly includes a translation driver (12) fixed to the top end of the outer wall of the side insert block (5), the translation driver (12) is arranged between the two driving blocks (9), and the output shaft end of the translation driver (12) is connected to the outer end of the long tooth plate (7).

6. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 5 is characterized in that: The translation driver (12) is provided with one or two.

7. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 5 is characterized in that: The output shaft end of the translation driver (12) is fixedly connected with a connector (13) with a T-shaped cross section, and the outer end of the long tooth plate (7) is provided with a connecting groove with a T-shaped cross section corresponding to the connecting head (13), and the connecting groove is arranged to penetrate from top to bottom.

8. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 1 is characterized in that: A built-in lifting mechanism (14) is also provided between the upper template (1) and the lower template (2).

9. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 8, characterized in that: The built-in lifting mechanism (14) comprises four lifting chambers (15) distributed in a rectangular shape between the upper template (1) and the lower template (2); the lifting chambers (15) are located between two adjacent side panels (5) and the lifting chambers (15) are open on the side away from the side panels (5); each lifting chamber (15) is provided with a lifting driver (16) fixedly connected to the upper template (1) and a connecting seat (17) connected to the lower template (2); the output shaft end of the lifting driver (16) is connected to the connecting seat (17).

10. The multi-layer slider core-pulling structure of the plastic turnover box injection mold according to claim 1, characterized in that: An injection liquid diverter plate (18) is also provided on the upper side of the lower mold plate (2), and six injection tubes (19) whose bottom ends are connected to the molding cavity (6) are fixedly connected to the bottom of the injection liquid diverter plate (18).

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