Sliding block rubber position mold stripping structure in mold

Abstract

The utility model discloses a sliding block rubber position mold stripping structure in a mold, which comprises a lower mold seat, a sliding block, a sliding block seat and a product mold cavity rear part, the inner wall of the sliding block is inwards sunken to form a cavity, an insert core is arranged in the cavity and is provided with a plurality of slots which are through front and back, ejection inserts are movably inserted in the slots and are inwards connected with first ejector pins, and the first ejector pins are connected with the sliding block seat. The first ejector pin is horizontally and movably inserted into the sliding block inwards, a first limiting part is arranged on the rear portion of the first ejector pin, a first movable groove allowing the first limiting part to move left and right is formed in the sliding block, the first ejector pin is sleeved with a first reset spring located on the left side of the first limiting part and in the first movable groove, and a sealing plate is arranged on the outer wall of the sliding block. The tail end of the first ejector pin penetrates through the sealing plate and is exposed outwards. According to the utility model, the glue position which is easy to draw a die is designed into the ejection insert which can move independently, and the ejection insert can eject the glue position outwards for a certain distance, so that the glue position is separated from the sliding block, and the problem that a product is stuck to the sliding block is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, in particular to a mold inner slider glue position demoulding structure. Background Art

[0002] like Figure 1 As shown in the figure, when the deeper glue position a on the slider reaches more than 10mm, due to the functional limitations of the product, its shape cannot be designed with sufficient demolding angle. During injection molding production, the temperature of the slider will continue to rise, and the clamping force at the glue position will also increase. During product demolding, when the slider is separated from the glue position, the glue position at this position is very likely to stick to the slider, causing damage to the glue position. The slider may also have assembly failures, resulting in unstable production and low production efficiency. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a mold slider glue position demoulding structure, which has a simple structure and can effectively solve the technical problem of difficulty in demoulding caused by the adhesion between the glue position and the slider.

[0004] To achieve the above purpose, the present invention adopts the following contents:

[0005] The utility model provides a mold inner slider glue position demolding structure, which includes a lower mold base, a slider, and a slider base, the lower mold base is provided with a product mold cavity rear portion, a slider is arranged on the outer side of the product mold cavity rear portion, and a slider base is arranged on the outer side of the slider, wherein: the inner wall of the slider is recessed inward to form a cavity, an insert is arranged in the cavity, and the insert has a plurality of slots that pass through the front and back, an ejection insert is movably inserted in the slot, the ejection insert is inwardly connected to a first ejector pin, the first ejector pin is horizontally movably inserted inward, and a first limiting portion is provided at the rear portion of the first ejector pin, and a first movable groove is provided in the slider for allowing the first limiting portion to move left and right, the first ejector pin is sleeved with a first return spring located on the left side of the first limiting portion and in the first movable groove, a sealing plate is provided on the outer wall of the slider, and the end of the first ejector pin passes through the sealing plate and is exposed outward.

[0006] According to a mold slider glue position demolding structure provided by the utility model, a space is left between the insert and the bottom end of the cavity, and a plurality of inlay pins are distributed in the space, the inlay pin is inwardly connected to the second ejector pin, the second ejector pin is inwardly horizontally movable and inserted in the slider, and a second limiting portion is provided at the rear of the second ejector pin, and a second movable groove for allowing the second limiting portion to move left and right is provided in the slider, the second ejector pin is sleeved with a second return spring located on the left side of the second limiting portion and in the second movable groove, and the end of the second ejector pin passes through the sealing plate and is exposed outward.

[0007] Furthermore, the plurality of insert pins and the plurality of ejection inserts are arranged in a left-right staggered manner with one at a time.

[0008] Furthermore, the inner wall surface of the slider is an inclined surface, and in a non-working state, the front end surfaces of the ejection insert and the insert pin are coplanar and aligned with the inner wall surface of the slider.

[0009] Furthermore, the outer wall surface of the slider is also an inclined surface. In a non-working state, the portion of the first ejector end exposed outwards is slightly smaller than the portion of the second ejector end exposed outwards.

[0010] According to the mold slider glue position demoulding structure provided by the utility model, the rear end of the insert is connected to a plurality of fixing rods, and the ends of the plurality of fixing rods are connected to the interior of the slider.

[0011] The beneficial effects of the present invention are as follows: the glue position that is easy to pull the mold is designed as an independently movable ejector insert, which can eject the glue position outward for a certain distance, thereby realizing the separation of the glue position and the slider, that is, the ejector insert can realize an action similar to that of an ejector pin, and when the slider moves a certain distance, the ejector insert stops ejecting outward, thereby reducing the overall clamping force of the glue position, and reducing the clamping force of the slider and the glue position when demolding, thereby solving the problem of product sticking to the slider and improving the production efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the glue position on the inside of an injection molded product;

[0014] Figure 2 This is a structural diagram of a mold inner slider glue position demoulding structure according to an embodiment of the utility model;

[0015] Figure 3 This is an exploded schematic diagram of the slider portion of an embodiment of the present utility model;

[0016] Figure 4 It is a cross-sectional schematic diagram of the ejection insert portion of the slider according to an embodiment of the present utility model;

[0017] Figure 5 It is a cross-sectional schematic diagram of the pin-embedded portion of the slider according to an embodiment of the present utility model;

[0018] a-glue position; 1-lower mold base, 2-rear part of the product mold cavity, 3-slider, 4-slider seat, 5-sealing plate, 6-insert, 7-ejector insert, 8-pin, 9-fixing rod, 31-chamber, 32-first movable groove, 33-second movable groove, 61-slot, 71-first ejector pin, 72-first limiting part, 73-first return spring, 81-second ejector pin, 82-second limiting part, 83-second return spring. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the following specific description is illustrative rather than restrictive and should not limit the scope of protection of the present invention.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] See also Figures 2 to 5 As shown. The embodiment of the present utility model proposes a mold slider glue position ejection structure, which is mainly used in injection molds. A product mold cavity rear portion 2 is set on the lower mold base 1 of the injection mold. The lower mold base 1 also has a slider 3 located outside the product mold cavity rear portion 2. The slider 3 can move back and forth relative to the product mold cavity rear portion 2, and a slider seat 4 is also provided on the outside of the slider 3. The slider seat 4 is used to push the slider 3 inward. The lower mold base 1, slider 3, and slider seat 4 belong to conventional designs in currently existing injection molds.

[0022] In this embodiment, a cavity 31 is formed on the inner wall of the slider 3, and an insert 6 is fixedly installed in the cavity 31. That is, the rear end of the insert 6 is connected to a plurality of fixing rods 9, and the ends of the fixing rods 9 are connected to the inside of the slider 1. The insert 6 has a plurality of slots 61 that pass through the front and back. The slots 61 are movably inserted with ejector inserts 7. The ejector inserts are irregular and are designed according to the shape of the glue position. Figure 2In the figure, the ejector insert is in the shape of a flat strip, and an arc-shaped protrusion protruding outward is provided in the middle of the top and bottom of the ejector insert; the ejector insert 7 is inwardly connected to the first ejector pin 71, and the first ejector pin 71 is inserted into the slider 3 for horizontal movement inward, and a first limiting portion 72 is provided at the rear of the first ejector pin 71, and a first movable groove 32 for the first limiting portion 72 to move left and right is provided in the slider 3. The first ejector pin 71 is sleeved with a first return spring 73 located on the left side of the first limiting portion 72 and in the first movable groove 32. A closing plate 5 is provided on the outer wall of the slider 3, and the end of the first ejector pin 71 passes through the closing plate 5 and is exposed outward.

[0023] Mold opening process: When the male and female templates are opened, the slider seat 4 pushes the slider 3 to retreat at the same time. However, because the templates are still attached and not separated, the ejector insert 7 at the front end of the first ejector pin 71 is still pressing against the product glue position. Since the slider 3 moves backward and the ejector insert 7 presses against the product glue position, the product glue position will not be stuck to the slider. When the template is separated from the end of the first ejector pin 71, the first return spring 73 will rebound the first ejector pin 71 backward, causing the first ejector pin 71 to return to its initial position. At this time, the ejector insert 7 is also separated from the product glue position.

[0024] Mold closing process: When the male and female mold plates are closed, the slider seat 4 moves the slider 3 forward at the same time to facilitate the subsequent product injection molding work.

[0025] In addition to the glue position, the injection molded product also has a plane position of the product. In order to prevent other surfaces of the product from sticking to the slider, additional inlay pins need to be added. Specifically: a space is left between the bottom end of the insert 6 and the bottom end of the chamber 31, and a number of inlay pins 8 that can move back and forth are distributed in the space. The inlay pin 8 is connected inwardly to the second ejector pin 81, and the second ejector pin 81 is inserted in the slider 3 for horizontal movement inward, and a second limiting portion 82 is provided at the rear of the second ejector pin 81, and a second movable groove 33 is provided in the slider 3 for the second limiting portion 82 to move left and right. The second ejector pin 81 is provided with a second return spring 83 located on the left side of the second limiting portion 82 and in the second movable groove 33. The end of the second ejector pin 81 passes through the sealing plate 5 and is exposed outward.

[0026] Similarly, during the mold opening process: while the male and female templates are opening, the slider seat 4 pushes the slider 3 to retreat at the same time. However, because the template is still attached and not separated, the front end of the second ejector 81 still presses against other surfaces of the product. Since the slider moves backward and the pin 8 presses against other surfaces of the product, the other surfaces of the product will not be stuck to the slider. When the template is separated from the end of the second ejector 81, the second return spring 83 will rebound the second ejector 81 backward, returning the second ejector 81 to its initial position. At this time, the pin 8 is also separated from other surfaces of the product.

[0027] Mold closing process: When the male and female mold plates are closed, the slider seat 4 moves the slider 3 forward at the same time to facilitate the subsequent product injection molding work.

[0028] In the actual injection molding process, the glue position on the product is separated from other contact positions. Therefore, during the design process, the plurality of inserts 8 and the plurality of ejector inserts 7 are also arranged in a left-right staggered manner with one interval therebetween to meet the shape of the injection molded product.

[0029] The inner and outer wall surfaces of the slider 3 are both designed with inclined surfaces, and the inclination direction of the inner wall surface of the slider 3 is opposite to the inclination direction of the outer wall surface of the slider 3. In the non-working state (the template is not in contact with the ends of the first ejector pin and the second ejector pin), the front end surfaces of the ejector insert 7 and the insert pin 8 are coplanarly aligned with the inner wall surface of the slider 3, the part exposed outwardly at the end of the first ejector pin 71 is slightly smaller than the part exposed outwardly at the end of the second ejector pin 81, and the ends of the first ejector pin 71 and the second ejector pin 81 are both spherical head surfaces.

[0030] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A mold inner slider glue position demoulding structure, comprising a lower mold base (1), a slider (3), and a slider base (4), wherein the lower mold base (1) has a product mold cavity rear portion (2), a slider (3) is arranged outside the product mold cavity rear portion (2), and a slider base (4) is arranged outside the slider (3), and the characteristics are: The inner wall of the slider (3) is recessed inward to form a chamber (31), an insert (6) is provided in the chamber (31), and the insert (6) has a plurality of slots (61) that pass through the front and back, an ejection insert (7) is movably inserted in the slot (61), the ejection insert (7) is inwardly connected to a first ejector pin (71), the first ejector pin (71) is horizontally movably inserted inward in the slider (3), and a first limiting portion (72) is provided at the rear of the first ejector pin (71), and a first movable groove (32) is provided in the slider (3) for allowing the first limiting portion (72) to move left and right, the first ejector pin (71) is sleeved with a first return spring (73) located on the left side of the first limiting portion (72) and in the first movable groove (32), a sealing plate (5) is provided on the outer wall of the slider (3), and the end of the first ejector pin (71) passes through the sealing plate (5) and is exposed outward.

2. A mold inner slider glue position demoulding structure according to claim 1, characterized in that: A space is left between the insert (6) and the bottom end of the chamber (31), and a plurality of inlay pins (8) are distributed in the space, the inlay pin (8) is connected inwardly to the second ejector pin (81), the second ejector pin (81) is inserted into the slider (3) for horizontal movement inwardly, and a second limiting portion (82) is provided at the rear of the second ejector pin (81), and a second movable groove (33) is provided in the slider (3) for the second limiting portion (82) to move left and right, the second ejector pin (81) is provided with a second return spring (83) located on the left side of the second limiting portion (82) and in the second movable groove (33), and the end of the second ejector pin (81) passes through the sealing plate (5) and is exposed outward.

3. The mold inner slider glue position demoulding structure according to claim 2, characterized in that: The plurality of insert pins (8) and the plurality of ejection inserts (7) are arranged in a left-right staggered manner with one at a time.

4. The mold inner slider glue position demoulding structure according to claim 3, characterized in that: The inner wall surface of the slider (3) is an inclined surface. In a non-working state, the front end surfaces of the ejection insert (7) and the insert pin (8) are coplanarly aligned with the inner wall surface of the slider (3).

5. The mold inner slider glue position demoulding structure according to claim 4, characterized in that: The outer wall surface of the slider (3) is also an inclined surface. In a non-operating state, the portion of the first ejector pin (71) exposed outwards is slightly smaller than the portion of the second ejector pin (81) exposed outwards.

6. The mold inner slider glue position demoulding structure according to claim 1, characterized in that: The rear end of the insert (6) is connected to a plurality of fixing rods (9), and the ends of the plurality of fixing rods (9) are connected to the interior of the slider (3).

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