A secondary core-pulling mold structure

Abstract

The present invention discloses a secondary core-pulling mold structure, comprising a longitudinally arranged shovel base, the shovel base being sleeved and fitted with an A-plate, a slider seat 1, and a slider seat 2. The A-plate is provided with a groove 1, and the slider seat 1 and the slider seat 2 are both arranged inside the groove 1 and slideably fitted with the inner wall of the groove 1 in the transverse direction. The A-plate moves back and forth in the longitudinal direction relative to the shovel base; the slider seat 1 is inlaid with a pin; and the slider seat 2 is inlaid with a component. When the A-plate moves downward, the shovel base drives the slider seat 1 to perform a first movement to the right, and the slider seat 1 drives the slider seat 1 inlaid pin to move to the upper right, completing the demoulding of the product with the first inverted buckle; when the A-plate continues to move downward, the shovel base drives the slider seat 1 and the slider seat 2 to perform a second step of synchronous movement to the right, and drives the slider seat 1 inlaid pin to move to the right, completing the demoulding of the product with the second inverted buckle. This secondary core-pulling mold structure solves the problem of products with undercuts in two directions, ensuring smooth demoulding when the injection molded product has undercuts in two directions.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a secondary core-pulling mold structure. Background Art

[0002] An injection mold is a tool used to produce plastic products; it also gives them a complete structure and precise dimensions. Injection molding is a processing method used for mass production of complex parts. Specifically, the process involves injecting heated, molten plastic into a mold cavity under high pressure using an injection molding machine. After cooling and solidification, the resulting molded product is formed.

[0003] For injection molded products with relatively regular shapes, ordinary injection molds can meet their injection molding needs. However, for products with special structures, ordinary injection molds cannot meet their injection molding needs. The specific manifestations are:

[0004] Some products have undercuts in two directions. A general slide that moves in a single direction can only remove the undercut in one direction, and the undercut in the other direction cannot be demoulded smoothly.

[0005] Therefore, a secondary core-pulling mold structure is designed to solve the above technical problems. Summary of the Invention

[0006] The present invention addresses the problem in the prior art that some products have undercuts in two directions. Generally, a slide that moves in a single direction can only remove the undercut in one direction, while the undercut in the other direction cannot be smoothly demoulded. The present invention proposes the following technical solutions:

[0007] A secondary core-pulling mold structure, comprising:

[0008] A longitudinally arranged shovel base, the shovel base being sleeved and matched with an A plate, a first slider seat, and a second slider seat, the A plate being provided with a first groove, the first slider seat and the second slider seat being both provided inside the first groove and slidingly matched with the inner wall of the first groove in the transverse direction, the A plate being reciprocating in the longitudinal direction relative to the shovel base;

[0009] A first slide pin, one end of which is matched with a first slide pin fixing block, a second slot is formed on the first slide seat, and the first slide pin fixing block is slidably matched with the second slot;

[0010] The second slide insert is mounted on the second slide seat. The second slide insert is provided with an insert guide groove, and the first slide insert passes through the insert guide groove.

[0011] When the A plate moves downward, the slider seat 1 performs the first step movement to the right, driving the slider seat 1 needle to move to the upper right, and the slider seat 1 and the slider seat 2 perform the second step movement to the right synchronously, driving the slider seat 1 needle to move to the right.

[0012] When plate A moves downward, the shovel base drives slide seat 1 to move to the right for the first step, and slide seat 1 drives slide seat 1 pin to move to the upper right, completing the demoulding of the product with inverted buckle 1; plate A continues to move downward, and the shovel base drives slide seat 1 and slide seat 2 to move to the right synchronously for the second step, driving slide seat 1 pin to move to the right, completing the demoulding of the product with inverted buckle 2. This secondary core-pulling mold structure solves the problem of products with inverted buckles in two directions and ensures smooth demoulding when the injection molded products have inverted buckles in two directions.

[0013] As a preferred embodiment of the above technical solution, the shovel base is provided with a first inclined plane, a second inclined plane, a limiting plane and a third inclined plane, wherein the first inclined plane, the second inclined plane and the limiting plane are arranged on the same side, and the first inclined plane and the third inclined plane are arranged correspondingly;

[0014] The inner cavity where the slider seat 1 contacts the shovel base is provided with inclined surface 4 and inclined surface 5; the inner cavity where the slider seat 2 contacts the shovel base is provided with inclined surface 8 and straight surface 1.

[0015] The shovel base and the slider seat one structure are arranged in coordination to drive the slider seat one to move to the right when the A plate moves downward. The shovel base, the slider seat one and the slider seat two structures are arranged in coordination to drive the slider seat one and the slider seat two to move to the right synchronously when the A plate moves downward.

[0016] As a preferred embodiment of the above technical solution, it also includes a limiting screw 1, one end of which is installed on the slide seat 1, and the other end of the limiting screw 1 contacts the end face of the slide seat 2, and drives the slide seat 2 to move synchronously with the slide seat 1.

[0017] The setting of the limit screw 1 contacts the end surface of the slide seat 2 and drives the slide seat 2 and the slide seat 1 to move synchronously.

[0018] As a preferred embodiment of the above technical solution, bevel six and bevel seven are provided at the end faces of the groove two where they cooperate with the pin of the slide position one.

[0019] The pin fixing block of the first slide position contacts the sixth and seventh inclined surfaces and slides with the second groove to improve the smoothness of the mold opening and closing movements.

[0020] As a preferred embodiment of the above technical solution, it also includes a limiting screw 2 for limiting the mold opening position of the slide seat 2, and the limiting screw 2 is installed in the groove 1.

[0021] The setting of limit screw 2 is to limit the mold opening position of slide seat 2 to avoid excessive movement.

[0022] As a preferred embodiment of the above technical solution, it also includes a wear-resistant block, which is installed at the limiting plane of the shovel base.

[0023] The setting of wear-resistant blocks improves the wear resistance of the shovel base and increases its service life.

[0024] As a preferred embodiment of the above technical solution, it further includes a panel fixed on the injection molding machine, the panel is connected to one end of the shovel base, a guide column is provided on the panel, and the guide column and the shovel base movable sleeve are provided with the same A plate;

[0025] A front mold core is provided on the A plate. The front mold core is provided on one side of the groove 1 and contacts the slide seat 1 and the slide seat 2 inserts.

[0026] As a preferred embodiment of the above technical solution, it also includes a spring for preventing the slider seat from rebounding after the mold is opened, and the spring is arranged between the front mold core and the slider seat.

[0027] The setting of the spring limits the position of the slider seat 1 and prevents the slider seat 1 from rebounding.

[0028] The beneficial effects of the present invention are:

[0029] When plate A moves downward, the shovel base drives slide seat 1 to move to the right for the first step, and slide seat 1 drives slide seat 1's inlay pin to move to the upper right, completing the demoulding of product inverted buckle 1; plate A continues to move downward, and the shovel base drives slide seat 1 and slide seat 2 to move to the right for the second step, driving slide seat 1's inlay pin to move to the right, completing the demoulding of product inverted buckle 2;

[0030] The invention discloses a secondary core-pulling mold structure, which solves the problem of products having undercuts in two directions and ensures smooth demoulding when the injection molded products have undercuts in two directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure shows a schematic structural diagram of a secondary core-pulling mold structure in Example 1;

[0032] Figure 2 for Figure 1 The structural diagram of the shovel base shown in FIG;

[0033] Figure 3 for Figure 1 The middle row shows a schematic diagram of the structure of a needle, wherein (1) is a front view, (2) is a right view, and (3) is a top view;

[0034] Figure 4 for Figure 1 A schematic diagram of the structure of a pin-mounted fixing block in the middle row; wherein (1) is a front view schematic diagram, and (2) is a left view schematic diagram;

[0035] Figure 5 for Figure 1Schematic diagram of the structure of the Bank of China seat 1, wherein (1) is a front view schematic diagram, and (2) is a top view schematic diagram;

[0036] Figure 6 for Figure 1 Schematic diagram of the structure of the second insert in the middle row;

[0037] Figure 7 for Figure 1 Schematic diagram of the structure of the second seat of the central bank, wherein (1) is a front view and (2) is a top view;

[0038] Figure 8 This is a schematic diagram of the state of mold opening action 1 in Example 1;

[0039] Figure 9 This is a schematic diagram of the state of mold opening action 2 in Example 1. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0041] Example 1

[0042] like Figure 1 As shown, a secondary core-pulling mold structure includes a longitudinally arranged shovel base 4, the shovel base 4 is sleeved with an A plate 3, a slider seat 1 8, and a slider seat 2 12. The A plate 3 is provided with a groove 1 31. The slider seat 1 8 and the slider seat 2 12 are both arranged inside the groove 1 31 and slide in cooperation with the inner wall of the groove 1 31 in the transverse direction. The A plate 3 moves back and forth in the longitudinal direction relative to the shovel base 4.

[0043] like Figure 3 、 Figure 4 As shown, the slide position 1 needle 6, in this embodiment, the cup head position of the slide position 1 needle 6 is made into a bevel 9, and is embedded in the slide position 1 needle fixing block 7. The setting of the slide position 1 needle fixing block 7 can change the inclination of the slide position 1 needle 6, making its opening and closing movement smoother, preventing it from getting stuck, and allowing the demolding of the undercut with a large inclination; the slide position seat 1 8 is provided with a groove 2 81, and the slide position 1 needle fixing block 7 slides with the groove 2 81. The end surface of the groove 2 81 that cooperates with the slide position 1 needle 6 is provided with a bevel 6 811 and a bevel 7 812. During use, the positioning surface 2 of the slide position 1 needle fixing block 7 is in contact with the positioning surface 1 of the slide position seat 1 8, preventing the slide position 1 needle fixing block 7 from rotating. The slide position 1 needle 6 and the slide position 1 needle fixing block 7 move along the direction of the needle guide groove 111 and slide on the bevel 6 811 and the bevel 7 812.

[0044] like Figure 6As shown, the second slide insert 11, in this embodiment, the second slide insert 11 is mounted on the second slide seat 12 by screws, and the second slide insert 11 is provided with a pin guide groove 111, and the first slide insert 6 passes through the pin guide groove 111;

[0045] A panel 1 is fixed to the injection molding machine and connected to one end of the shovel base 4. A guide post 14 is provided on the panel 1. This position limits the movement of the A-plate 3, allowing it to move on the guide post 14 in the mold opening and closing direction. The guide post 14 and the shovel base 4 are movably mounted on the same A-plate 3. The front mold core 2 is mounted on the A-plate 3, located on one side of the groove 1 31 and in contact with the slider seat 1 8 and the slider second insert 11. In this embodiment, the shovel base 4 is mounted on the panel 1 and the front mold core 2 is also mounted on the A-plate 3 via screws. In other embodiments, other connection methods can be used between the shovel base 4 and the panel 1, and between the front mold core 2 and the A-plate 3.

[0046] This is a secondary core-pulling mold structure. In this embodiment, the product 15 is set at the position of the front mold core 2. The product 15 has two undercuts in the product undercut 151 and the product undercut 2 152. When the A plate 3 moves downward, the shovel base 4 drives the slider seat 1 8 to move to the right for the first step (the slider seat 2 12 does not move at this time). Under the cooperation between the groove 2 81 and the slider pin fixing block 7, and the cooperation between the slider pin 6 and the pin guide groove 111, the slider seat 1 8 drives the slider pin 6 to move to the upper right to complete the demoulding of the product undercut 151. Figure 8 A plate 3 continues to move downward, the shovel base 4 drives the slider seat 8 and the slider seat 12 to move synchronously to the right in the second step, driving the slider pin 6 to move to the right, completing the demoulding of the product undercut 152, reference Figure 9 .

[0047] like Figure 1 、 Figure 2 As shown, the shovel base 4 is provided with an inclined plane 1 41, an inclined plane 2 43, a limiting plane 42 and an inclined plane 3 44. The inclined plane 1 41, the inclined plane 2 43 and the limiting plane 42 are arranged on the same side, and the inclined plane 1 41 and the inclined plane 3 44 are arranged correspondingly;

[0048] like Figure 5 As shown, the inner cavity where the sliding seat 1 8 contacts the shovel base 4 is provided with a slope 4 82 and a slope 5 83; Figure 7 As shown, the inner cavity where the sliding seat 2 12 contacts the shovel base 4 is provided with an inclined surface 8 121 and a straight surface 122 .

[0049] like Figure 1As shown, it also includes a limit screw 9, one end of which is installed on the slider seat 1 8, and the other end of the limit screw 9 contacts the end surface of the slider seat 2 12, and drives the slider seat 2 12 and the slider seat 1 8 to move synchronously.

[0050] In this embodiment, when the mold opening action is performed, the A plate 3 drives the slider seat 1 8 and the slider seat 2 12 to move downward, and the inclined surface 1 41, the inclined surface 3 44 cooperate with the inclined surface 4 82 and the inclined surface 5 83 to drive the slider seat 1 8 to move to the right, and the inclined surface 7 812 drives the slider pin 1 6 and the slider pin fixing block 7 to move to the upper right along the pin guide groove 111, completing the demoulding of the product inverted buckle 151; at this time, the straight surface 122 cooperates with the limiting plane 42, and the slider seat 2 12 does not move; the A plate 3 continues to move downward, and at this time the limiting plane 42 of the shovel base 4 is separated from the straight surface 122 on the slider seat 2 12, and the limiting screw 1 9 on the slider seat 1 8 contacts the slider seat 2 12, and the slider seat 1 8 and the slider seat 2 12 move synchronously to the right, completing the demoulding of the product inverted buckle 2 152.

[0051] refer to Figure 1 In order to avoid excessive movement, it also includes a limit screw 2 10 for limiting the mold opening position of the slide seat 2 12 . The limit screw 2 10 is installed in the groove 1 31 and is located at the upper right corner of the slide seat 2 12 .

[0052] refer to Figure 1 、 Figure 2 In order to improve the wear resistance of the shovel base 4 and increase its service life, a wear-resistant block 13 is also included. In this embodiment, the wear-resistant block 13 is installed at the limiting plane 42 of the shovel base 4 by screws.

[0053] refer to Figure 1 In order to limit the slider seat 8 and prevent the slider seat 8 from rebounding, a spring 5 is also included to prevent the slider seat 8 from rebounding after the mold is opened. The spring 5 is arranged between the front mold core 2 and the slider seat 8. In this embodiment, one end of the spring 5 can be extended into the installation groove opened on the slider seat 8 to reduce the area occupied by the structure.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A secondary core-pulling mold structure, characterized in that: include, A shovel base (4) is arranged longitudinally, wherein the shovel base (4) is sleeved with an A plate (3), a first slider seat (8) and a second slider seat (12), a groove (31) is provided on the A plate (3), the first slider seat (8) and the second slider seat (12) are both arranged inside the groove (31) and slideably cooperate with the inner wall of the groove (31) in the transverse direction, and the A plate (3) moves back and forth in the longitudinal direction relative to the shovel base (4); A first slide needle (6), one end of the first slide needle (6) is matched with a first slide needle fixing block (7), a second groove (81) is provided on the first slide seat (8), and the first slide needle fixing block (7) is slidably matched with the second groove (81); The second row insert (11) is installed on the second row seat (12), and the second row insert (11) is provided with a needle guide groove (111), and the first row insert (6) passes through the needle guide groove (111); When the A plate (3) moves downward, the first row seat (8) moves to the right in the first step, driving the first row seat needle (6) to move to the upper right, and the first row seat (8) and the second row seat (12) move to the right in the second step synchronously, driving the first row seat needle (6) to move to the right; The shovel base (4) is provided with a first inclined plane (41), a second inclined plane (43), a limiting plane (42) and a third inclined plane (44), wherein the first inclined plane (41), the second inclined plane (43) and the limiting plane (42) are arranged on the same side, and the first inclined plane (41) and the third inclined plane (44) are arranged correspondingly; The inner cavity where the sliding seat 1 (8) contacts the shovel base (4) is provided with a bevel 4 (82) and a bevel 5 (83); the inner cavity where the sliding seat 2 (12) contacts the shovel base (4) is provided with a bevel 8 (121) and a straight surface 1 (122); It also includes a limiting screw 1 (9), one end of which is mounted on the sliding seat 1 (8), and the other end of which contacts the end surface of the sliding seat 2 (12), and drives the sliding seat 2 (12) and the sliding seat 1 (8) to move synchronously; The end surfaces of the second groove (81) and the first position needle (6) are provided with a sixth bevel (811) and a seventh bevel (812).

2. A secondary core-pulling mold structure according to claim 1, characterized in that: It also includes a limiting screw 2 (10) for limiting the mold opening position of the sliding seat 2 (12), and the limiting screw 2 (10) is installed in the groove 1 (31).

3. A secondary core-pulling mold structure according to claim 1, characterized in that: It also includes a wear-resistant block (13), which is installed on the limiting plane (42) of the shovel base (4).

4. A secondary core-pulling mold structure according to claim 1, characterized in that: It also includes a panel (1) fixed on the injection molding machine, the panel (1) is connected to one end of the shovel base (4), a guide column (14) is provided on the panel (1), and the guide column (14) and the shovel base (4) are movably sleeved with the same A plate (3); A front mold core (2) is provided on the A plate (3), and the front mold core (2) is provided on one side of the groove 1 (31) and is in contact with the slide seat 1 (8) and the slide seat 2 insert (11).

5. A secondary core-pulling mold structure according to claim 4, characterized in that: It also includes a spring (5) for preventing the sliding seat (8) from rebounding after the mold is opened, and the spring (5) is arranged between the front mold core (2) and the sliding seat (8).

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