Push plate type demolding mechanism

Abstract

The utility model discloses a push plate type demoulding mechanism, which is applied to the technical field of demoulding mechanisms, and adopts the technical scheme that the push plate type demoulding mechanism comprises an upper mould base and a lower mould base, a lower mould core is fixedly arranged on the lower mould base, and an upper mould plate is fixedly arranged on the upper mould base; a plurality of concave mold grooves are formed in the lower mold core, the upper mold plate comprises a fixedly arranged first mold plate and a second mold plate movably connected to the first mold plate in the vertical direction, an injection molding block is fixedly connected to the first mold plate, and a plurality of convex mold blocks matched with the concave mold grooves are fixedly arranged at the bottom of the injection molding block in a protruding mode. The female die groove and the male die block are combined to form a forming cavity, and when the first die plate is attached to the second die plate, the bottom face of the second die plate is flush with the bottom of the injection molding block; the utility model has the technical effects that the structure is simple, the product appearance flatness is good, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of demoulding mechanisms, in particular to a push-plate type demoulding mechanism. Background Art

[0002] Currently, if Figure 5 As shown in the current plastic mold design, the product is demoulded by ejector pins / ejector blocks. On the one hand, the products produced by this mold design will have traces of ejector pins ejecting, resulting in abnormally poor appearance of the injection molded product. In addition, when the ejector pin ejects the material, the contact area is small, which can easily cause the product to deform, thereby reducing the yield rate and affecting the flatness of the product. On the other hand, since the surface area of ​​the ejector pin end face is small, it is necessary to evenly arrange multiple ejectors in the mold core of the public mold to reduce damage to the injection molded product, resulting in a large number of ejector pins / ejector blocks, which is not conducive to mold core design and increases mold cost. In addition, since the surface area of ​​the ejector pin / ejector block is small, it is easy to break during mold closing or mold separation during the production process, thereby affecting the injection molding efficiency. There is a need for improvement. Utility Model Content

[0003] The utility model aims to provide a push plate type demoulding mechanism, which has the advantages of simple structure, good product appearance flatness and reduced production cost.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions: a push plate type demoulding mechanism, including an upper mold base and a lower mold base, the lower mold base is fixedly provided with a lower mold core, and the upper mold base is fixedly provided with an upper mold plate; the lower mold core is provided with a plurality of concave mold grooves, the upper mold plate includes a first fixedly set mold plate and a second mold plate movably connected to the first mold plate along the vertical direction, an injection block is fixedly connected to the first mold plate, a plurality of convex modules cooperating with the concave mold grooves are protruding and fixedly provided on the bottom of the injection block, the concave mold grooves and the convex modules are combined to form a molding cavity, and when the first mold plate and the second mold plate are affixed, the bottom surface of the second mold plate is flush with the bottom of the injection block.

[0005] The utility model is further configured as follows: a plurality of guide posts are evenly fixed on the upper die seat along the vertical direction, a guide hole cooperating with the guide posts is provided on the lower die seat, and a sliding hole cooperating with the guide posts to achieve sliding on the guide posts is provided on the second template.

[0006] The present utility model is further configured such that: the injection molding block includes a connecting portion fixedly locked to the first template and a guiding portion fixedly connected to the connecting portion, the convex block module is disposed at one end of the guiding portion away from the connecting portion, a pushing block plate flush with the bottom surface of the second template is fixedly locked on the second template, a first stepped groove for accommodating and fixing the connecting portion is formed on the first template, a second stepped groove for accommodating and fixing the pushing block plate is formed on the second template, and a receiving groove for accommodating the lower mold core is also formed on the lower mold base.

[0007] The present utility model is further configured such that: the gap between the first template and the second template does not exceed the height of the molding cavity.

[0008] The present utility model is further configured such that: an injection molding seat is fixedly provided on the upper mold base, a plurality of injection molding pipes are fixedly provided on the injection molding seat along the vertical direction, receiving and positioning holes for accommodating the injection molding pipes are formed on the connecting portion and the guiding portion, an injection port communicating with the receiving and positioning holes is formed on the convex block module for injecting the fluid molding material into the molding cavity by the injection molding pipes, and a third stepped groove for accommodating and fixing the injection molding seat is formed on the upper mold base.

[0009] The present utility model is further configured such that: the injection molding block, the pushing block plate, the injection molding seat, and the lower mold core can be disassembled and replaced respectively from the first template, the second template, the upper mold base, and the lower mold base to meet the injection molding requirements of different parts.

[0010] The present utility model is further configured such that: a cooling pipeline for cooling is provided inside the lower mold core.

[0011] In summary, the present utility model has the following beneficial effects:

[0012] 1. By setting the upper template to include a first template with a fixed setting and a second template movably connected to the first template along the vertical direction, an injection block is provided on the first template, and a convex module matching the concave die groove is protrudingly provided at the bottom of the injection block, and it is set that when the first template and the second template are attached, the bottom of the second template is flush with the bottom of the injection block. When in the mold closing state, the first template and the second template are attached, the convex module protrudes from the second template and combines with the concave die groove to form a molding cavity, and the fluid molding material sequentially enters the molding cavity through the injection pipe and the injection port to realize the molding of parts. When demolding is required, the upper mold base drives the upper template to move upward to open the mold, thereby driving the first template to move upward and then driving the injection block to move upward. However, since the second template can move on the first template, due to the gravity of the second template, the second template will not move with the first template when opening the mold. The bottom surface of the second template abuts against the outer edge of the part to prevent the part from moving, so that a certain gap is generated between the part and the bottom surface of the convex module to realize the demolding of the product. The structure is simple, which avoids the need to set ejector pins in the injection block or the concave die groove, which is not conducive to the design of the mold core, and at the same time avoids the need to repair the ejector pins, greatly reducing the manufacturing cost and the later maintenance cost of the mold, avoiding the appearance abnormality of the injection molded product caused by the ejector pin abutting against the product, and ensuring the surface flatness of the product;

[0013] 2. It is set that the injection block, the push plate block, the injection seat and the lower mold core can be disassembled and replaced from the first template, the second template, the upper mold base and the lower mold base respectively, so that different products can be injection molded by replacing different injection blocks, push plate blocks, injection seats and lower mold cores, improving the adaptability and reducing the manufacturing cost of the mold. Description of the Drawings

[0014] Figure 1 is the overall structural explosion diagram of this embodiment;

[0015] Figure 2 is the overall structural cross-sectional view of this embodiment;

[0016] Figure 3 is Figure 2 the enlarged view of part A of;

[0017] Figure 4 is Figure 3 the enlarged view of part A of;

[0018] Figure 5 is the schematic diagram of the current plastic mold design mechanism.

[0019] Reference numerals: 1, upper die base; 11, upper template; 12, first template; 13, second template; 14, injection block; 141, connecting portion; 142, diversion portion; 143, accommodation positioning hole; 15, convex module; 16, guide post; 18, ejector plate; 19, first stepped groove; 110, second stepped groove; 111, injection seat; 112, injection pipe; 113, injection port; 114, third stepped groove; 2, lower die base; 21, lower die core; 22, concave die groove; 23, guide hole; 24, accommodation groove; 25, cooling pipeline. Detailed implementation mode

[0020] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] Example:

[0022] Refer to Figures 1 to 4, A push plate demoulding mechanism, including an upper die base 1 and a lower die base 2. A lower die core 21 is fixedly arranged on the lower die base 2, and an upper template 11 is fixedly arranged on the upper die base 1. A number of concave die grooves 22 are arranged on the lower die core 21. The upper template 11 includes a fixedly arranged first template 12 and a second template 13 movably connected to the first template 12 along the vertical direction. The gap between the first template 12 and the second template 13 can be adjusted according to the height of the produced product. An injection block 14 is fixedly connected to the first template 12. A number of convex modules 15 cooperating with the concave die grooves 22 are fixedly protruded at the bottom of the injection block 14. A molding cavity is formed by the combination of the concave die grooves 22 and the convex modules 15. A cooling pipeline 25 for cooling the molding cavity is arranged in the lower die core 21. By injecting coolant into the cooling pipeline 25, etc., rapid cooling of the parts is achieved. When the first template 12 and the second template 13 are in contact, the bottom surface of the second template 13 is flush with the bottom of the injection block 14. When in the mold closing state, the first template 12 and the second template 13 are in contact. The convex modules 15 protrude from the second template 13 and combine with the concave die grooves 22 to form a molding cavity. The fluidized molding material enters the molding cavity through the injection pipe 112 and the injection port 113 in sequence to achieve the molding of the parts. When demoulding is required, the upper die base 1 drives the upper template 11 to move upward to open the mold, thereby driving the first template 12 to move upward and then driving the injection block 14 to move upward. However, since the second template 13 can move on the first template 12, due to the gravity of the second template 13, the second template 13 will not move with the first template 12 when opening the mold. The bottom surface of the second template 13 abuts against the outer edge of the part to prevent the part from moving, so that a certain gap is generated between the part and the bottom surface of the convex module 15 to achieve the demoulding of the product. The structure is simple, avoiding the need to set ejector pins in the injection block 14 or the concave die grooves 22, which is not conducive to the design of the die core. At the same time, it avoids the need to repair the ejector pins, greatly reducing the manufacturing cost and the later maintenance cost of the mold, avoiding the appearance abnormality of the injection molded product caused by the ejector pin abutting against the product, and ensuring the surface flatness of the product.

[0023] Reference Figures 1 to 2 , Specifically, a number of guide posts 16 are fixedly arranged on the upper die base 1 along the vertical direction at equal intervals. Guide holes 23 cooperating with the guide posts 16 are opened on the lower die base 2. Slide holes cooperating with the guide posts 16 are opened on the second template 13 to achieve sliding on the guide posts 16. When starting to separate the mold, the upper die base 1 drives the first template 12 and the guide posts 16 to move upward. At this time, the second template 13 is in contact with the lower die base 2, and the guide posts 16 slide in the guide holes 23 to ensure that the second template 13 will not move with the first template 12.

[0024] Reference Figures 1 to 2, Specifically, the injection block 14 includes a connecting portion 141 fixedly locked to the first template 12 and a guiding portion 142 fixedly connected to the connecting portion 141. The convex block 15 is disposed at one end of the guiding portion 142 away from the connecting portion 141. A pushing block 18 flush with the bottom surface of the second template 13 is fixedly locked on the second template 13. A first stepped groove 19 for accommodating and fixing the connecting portion 141 is formed on the first template 12. A second stepped groove 110 for accommodating and fixing the pushing block 18 is formed on the second template 13. A receiving groove 24 for accommodating the lower die core 21 is also formed on the lower die base 2. An injection seat 111 is fixedly provided on the upper die base 1. A plurality of injection pipes 112 are fixedly provided on the injection seat 111 along the vertical direction. Accommodating and positioning holes 143 for accommodating the plastic pipes are formed on the connecting portion 141 and the guiding portion 142. An injection port 113 communicating with the accommodating and positioning holes 143 is formed on the convex block 15, so as to allow the injection pipes 112 to inject the fluid molding material into the molding cavity. A third stepped groove 114 for accommodating and fixing the injection seat 111 is formed on the upper die base 1. The injection block 14, the pushing block 18, the injection seat 111 and the lower die core 21 can be disassembled and replaced from the first template 12, the second template 13, the upper die base 1 and the lower die base 2 respectively to adapt to the injection requirements of different parts. Thus, by replacing different injection blocks 14, pushing blocks 18, injection seats 111 and lower die cores 21, different products can be injected, improving the adaptability and reducing the manufacturing cost of the mold. The gap between the first template 12 and the second template 13 does not exceed the height of the molding cavity. In this embodiment, the height of the molding cavity does not exceed 0.3 mm.

[0025] Brief description of the use process: When in the closed mold state, the first template 12 and the second template 13 are in contact. The convex block 15 protrudes from the second template 13 and combines with the concave die groove 22 to form a molding cavity. The fluid molding material enters the molding cavity through the injection pipes 112 and the injection ports 113 in sequence to realize the molding of the part. When demolding is required, the upper die base 1 drives the upper template 11 to move upward to open the mold, which drives the first template 12 to move upward and then drives the injection block 14 to move upward. However, since the second template 13 can move on the first template 12, due to the gravity of the second template 13, the second template 13 will not move with the first template 12 when opening the mold. The bottom surface of the second template 13 abuts against the outer edge of the part to prevent the part from moving, so that a certain gap is generated between the part and the bottom surface of the convex block 15 to realize the demolding of the product.

[0026] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A push plate type demoulding mechanism, comprising an upper mold base (1) and a lower mold base (2), wherein a lower mold core (21) is fixedly provided on the lower mold base (2), and an upper mold plate (11) is fixedly provided on the upper mold base (1); characterized in that: The lower mold core (21) is provided with a plurality of concave mold grooves (22); the upper mold plate (11) comprises a first mold plate (12) which is fixedly arranged and a second mold plate (13) which is movably connected to the first mold plate (12) along a vertical direction; an injection block (14) is fixedly connected to the first mold plate (12); a plurality of convex modules (15) which cooperate with the concave mold grooves (22) are fixedly arranged on the bottom of the injection block (14); the concave mold grooves (22) and the convex modules (15) are combined to form a molding cavity; when the first mold plate (12) and the second mold plate (13) are in contact with each other, the bottom surface of the second mold plate (13) is flush with the bottom surface of the injection block (14).

2. A push plate type demoulding mechanism according to claim 1, characterized in that: A plurality of guide posts (16) are evenly fixedly provided on the upper die seat (1) along the vertical direction, a guide hole (23) cooperating with the guide posts (16) is provided on the lower die seat (2), and a sliding hole cooperating with the guide posts (16) to achieve sliding on the guide posts (16) is provided on the second die plate (13).

3. A push plate type demoulding mechanism according to claim 1, characterized in that: The injection block (14) comprises a connecting portion (141) which is locked and fixedly connected to the first template (12) and a guide portion (142) which is fixedly connected to the connecting portion (141); the convex module (15) is arranged at one end of the guide portion (142) which is away from the connecting portion (141); a push plate (18) which is flush with the bottom surface of the second template (13) is locked and fixedly provided on the second template (13); a first stepped groove (19) for accommodating and fixing the connecting portion (141) is provided on the first template (12); a second stepped groove (110) for accommodating and fixing the push plate (18) is provided on the second template (13); and a receiving groove (24) for accommodating the lower mold core (21) is also provided on the lower mold base (2).

4. A push plate type demoulding mechanism according to claim 3, characterized in that: The gap between the first template (12) and the second template (13) does not exceed the height of the molding cavity.

5. The push plate type demoulding mechanism according to claim 3, characterized in that: An injection molding seat (111) is fixedly provided on the upper mold base (1), and a plurality of injection molding tubes (112) are fixedly provided on the injection molding seat (111) along the vertical direction. The connecting portion (141) and the guide portion (142) are provided with a receiving positioning hole (143) for receiving the injection molding tube (112). The convex module (15) is provided with an injection port (113) which is connected to the receiving positioning hole (143) so as to allow the injection molding tube (112) to inject a fluid molding material into the molding cavity. The upper mold base (1) is provided with a third stepped groove (114) for receiving and fixing the injection molding seat (111).

6. A push plate type demoulding mechanism according to claim 5, characterized in that: The injection block (14), the push plate (18), the injection seat (111) and the lower mold core (21) can be disassembled, assembled and replaced from the first mold plate (12), the second mold plate (13), the upper mold seat (1) and the lower mold seat (2) respectively, so as to meet the injection molding requirements of different parts.

7. The push plate type demoulding mechanism according to claim 1, characterized in that: A cooling pipeline (25) for cooling is provided inside the lower mold core (21).

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