Reciprocating type lever structure double-color mold
By adopting a reciprocating lever structure and a cam connecting rod mechanism in a two-color mold, the problem of core compression deformation caused by the long distance of the cavity on the moving mold side is solved, precise dimensional control and long-term stability are achieved, and the molding range of the mold is widened .
Patent Information
- Application Number
- CN202421188001.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The existing two-color molds are far away from the cavity on the moving mold side, resulting in pressure deformation of the core and large size fluctuations, making it difficult to achieve precise control.
Adopting a reciprocating lever structure and a cam connecting rod mechanism, the moving core assembly is driven by a connecting rod composed of reset rod, cam, fixed shaft and support sleeve, shortening the core length, and increasing the contact area through the ball head design to improve strength. .
It realizes precise control of the shape of the cavity on the moving mold side, shortens the core length, avoids dimensional fluctuations caused by the core compression deformation, and ensures the long-term stability of the product size.
Smart Images
Figure CN222290749U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of molds, in particular to a reciprocating lever structure double-color mold. Background Art
[0002] Molds are various molds and tools used in industrial production to obtain the required products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. Two-color molding molds include a primary mold and a secondary mold. They are relatively independent and complete molds. Usually, the two fixed mold sides of a two-color mold are different, and the two movable mold sides are the same;
[0003] Two-color molded products not only have extremely strict dimensional requirements, but also require secondary molded product parts on the movable mold side. This cannot be achieved with ordinary two-color molds. Since the movable mold plate is far away from the cavity, it is difficult to shorten the length of the core, and the core is prone to compression deformation and large dimensional fluctuations, making it difficult to accurately control the product size. Utility Model Content
[0004] In view of the deficiencies of the prior art, the utility model provides a two-color mold with a reciprocating lever structure to solve the problems of large dimensional fluctuations caused by compression deformation of the mold core.
[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a reciprocating lever structure two-color mold, including a movable mold taking plate;
[0006] A primary fixed mold assembly and a secondary fixed mold assembly are arranged above the movable mold taking-up plate, wherein the primary fixed mold assembly is composed of a primary fixed mold taking-up plate, a primary hot runner plate, a primary hot runner stripper plate and a primary fixed mold plate, and the secondary fixed mold assembly is composed of a secondary fixed mold taking-up plate, a secondary hot runner plate, a secondary hot runner stripper plate and a secondary fixed mold plate;
[0007] A primary movable mold assembly is provided below the primary fixed mold assembly, and a secondary movable mold assembly is provided below the secondary fixed mold assembly. Both the primary movable mold assembly and the secondary movable mold assembly are composed of a movable mold plate, mold legs, a push rod plate, a push rod bottom plate and a movable mold taking plate.
[0008] Preferably, a fixed mold core is installed in the one-shot fixed mold plate.
[0009] Preferably, a secondary mold fixed pattern core is installed in the secondary mold fixed template.
[0010] Preferably, a dynamic mold core is installed in the dynamic mold plate, a cam connecting rod mechanism is provided on the side of the dynamic mold core, and a dynamic mold core assembly is provided below.
[0011] Preferably, the cam-linkage mechanism consists of a reset rod, a cam, a fixed shaft and a support sleeve. The reset rod is movably connected in the support sleeve. One end of the reset rod cooperates with the reset block of the primary fixed mold, and a gap is provided between the reset rod and the secondary fixed mold plate. The cam is installed under the support sleeve through the fixed shaft. The lower end of the reset rod acts on the cam, and the long wheelbase side of the cam is in contact with the reset rod.
[0012] Preferably, the movable core assembly is composed of a movable mold insert shaft, a guide column, a front ejector plate and a front ejector bottom plate, the front ejector bottom plate and the front ejector plate are fastened by screws, the short wheelbase side of the cam is in contact with the front ejector bottom plate, the movable mold insert shaft and the guide column are distributed left and right, and the movable mold insert shaft and the guide column are fixed between the front ejector plate and the movable mold insert shaft and the guide column.
[0013] Preferably, a gap is provided between the upper end of the guide column and the primary fixed plate, and the secondary fixed plate matches the gap.
[0014] The utility model provides a reciprocating lever structure two-color mold, which has the following beneficial effects:
[0015] 1. By using a cam-link mechanism to drive the moving core assembly in this mold, the shape of the cavity on the moving mold side is changed, which not only meets the product requirements but also can accurately control the size. The moving core assembly refers to the structural design of the ejection system and is moved forward to the inside of the moving mold template, which is very close to the cavity. This can not only greatly shorten the length of the core, but also avoid the problem of large fluctuations in product size caused by compression deformation of the core;
[0016] 2. By adopting a ball head design structure at the contact position between the ejector and the cam, the contact area is greatly increased, the strength is increased, the wear that may be caused by long mass production time is avoided, and the long-term stability of the size is ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of the one-step fixed mold of the utility model;
[0018] Figure 2 It is a schematic diagram of the overall structure of the secondary fixed mold of the utility model.
[0019] Figure 1-2In the middle: movable mold taking plate 1, primary hot runner plate 2, primary hot runner stripping plate 3, primary fixed mold plate 4, movable mold plate 5, mold leg 6, ejector plate 7, ejector bottom plate 8, primary fixed mold taking plate 9, fixed mold core 10, movable mold core 11, movable mold inlay shaft 12, primary fixed mold reset block 13, reset rod 14, cam 15, fixed shaft 16, support sleeve 17, guide column 18, front ejector plate 19, front ejector bottom plate 20, secondary fixed mold taking plate 21, secondary hot runner plate 22, secondary hot runner stripping plate 23, secondary fixed mold plate 24, secondary fixed mold core 25. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-2 The utility model provides a technical solution: a reciprocating lever structure two-color mold, including a movable mold taking-up plate 1, a primary fixed mold assembly and a secondary fixed mold assembly are arranged above the movable mold taking-up plate 1, the primary fixed mold assembly is composed of a primary fixed mold taking-up plate 9, a primary hot runner plate 2, a primary hot runner stripper plate 3 and a primary fixed mold plate 4, the secondary fixed mold assembly is composed of a secondary fixed mold taking-up plate 21, a secondary hot runner plate 22, a secondary hot runner stripper plate 23 and a secondary fixed mold plate 24, a primary movable mold assembly is arranged below the primary fixed mold assembly, a secondary movable mold assembly is arranged below the secondary fixed mold assembly, the primary movable mold assembly and the secondary movable mold assembly are both composed of a movable mold plate 5, a mold leg 6, a push rod plate 7, a push rod bottom plate 8 and a movable mold taking-up plate 1, and a fixed mold core is installed in the primary fixed mold plate 4 10. A secondary mold fixed mold core 25 is installed in the secondary mold fixed mold plate 24. A cam connecting rod mechanism is provided on the side of the dynamic mold core 11, and a dynamic core assembly is provided below. The cam connecting rod mechanism is composed of a reset rod 14, a cam 15, a fixed shaft 16 and a support sleeve 17. The dynamic core assembly is composed of a dynamic mold insert shaft 12, a guide column 18, a front ejector plate 19 and a front ejector bottom plate 20. The front ejector bottom plate 20 is fastened to the front ejector plate 19 by screws. The short wheelbase side of the cam 15 is in contact with the front ejector bottom plate 20. The dynamic mold insert shaft 12 and the guide column 18 are distributed left and right, and the dynamic mold insert shaft 12 and the guide column 18 are fixed between the front ejector plate 19 and the ejector bottom plate 20. A gap is provided between the upper end of the guide column 18 and the primary mold fixed mold plate 4, and the secondary mold fixed mold plate 24 cooperates with the gap.
[0022] By adopting a cam-linkage mechanism to drive the moving core assembly in the present mold, since the cam-linkage mechanism is composed of a reset rod 14, a cam 15, a fixed shaft 16 and a support sleeve 17, and the moving core assembly is composed of a moving mold inlay shaft 12, a guide column 18, a front ejector plate 19 and a front ejector bottom plate 20, when the mold is working, under the premise that a moving mold side cavity is provided in the mold, the shape of the moving mold side cavity is changed, which not only meets the requirements of the product but also can accurately control the size. The moving core assembly refers to the structural design of the existing mold ejection system (the ejection system is relatively mature in the existing mold technology, so it will not be described in detail), and is moved forward to the inside of the moving mold plate 5. Since the moving core assembly is very close to the cavity, it can not only greatly shorten the length of the core, but also avoid the problem of large fluctuations in product size caused by compression deformation of the core.
[0023] In this embodiment, a dynamic mold core 11 is installed in the dynamic mold plate 5, and the reset rod 14 is movably connected in the support sleeve 17. One end of the reset rod 14 cooperates with the primary mold reset block 13, and a gap is provided between the reset rod 14 and the secondary mold fixed mold plate 24. The cam 15 is installed below the support sleeve 17 through the fixed shaft 16. The lower end of the reset rod 14 acts on the cam 15, and the long wheelbase side of the cam 15 is in contact with the reset rod 14.
[0024] Since the reset rod 14 acts on the cam 15, a ball head design structure is preferably adopted at the contact position between the top rod part of the reset rod 14 and the cam 14, so that the contact area is greatly increased, the strength is increased, and the wear caused by long mass production time is avoided, and the long-term stability of the size is ensured. In addition, a support sleeve 17 is added to the top rod of the reset rod 14 to avoid complete deformation of the top rod part of the reset rod 14 to a greater extent, making the movement smoother. In summary, the structural design of the mold is not only suitable for simple shaft-embedded cores, but also applicable to complex shapes and multiple movable cores, which broadens the molding range of two-color molds and enriches the product research and development solutions.
[0025] Working principle:
[0026] During molding, the movable mold sides of the two sets of molds are rotated and interchanged, and are alternately combined with the two fixed mold sides for molding. When the primary mold is closed, the primary fixed mold reset block 13 will press against the reset rod 14, the reset rod 14 presses against the cam 15, and the cam 15 rotates around the fixed shaft 16, thereby pressing against the forward ejector bottom plate 20, so that the movable mold inlay shaft 12 moves up and forms a collision hole with the fixed mold core 10. After the primary mold is formed, the movable mold side of the mold is interchanged, and then the secondary mold fixed mold side and the reset rod 14 are spaced apart, and the secondary mold fixed mold core 25 presses the guide column 18, so that the movable mold core assembly can retreat, leaving space for the secondary mold molding, forming a variable movable mold cavity, thereby forming the secondary mold product.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A two-color mold with a reciprocating lever structure, comprising a movable mold taking plate (1), characterized in that: A disposable fixed mold assembly and a secondary fixed mold assembly are arranged above the movable mold taking-up plate (1), wherein the disposable fixed mold assembly is composed of a primary fixed mold taking-up plate (9), a primary hot runner plate (2), a primary hot runner stripper plate (3) and a primary fixed mold plate (4), and the secondary fixed mold assembly is composed of a secondary fixed mold taking-up plate (21), a secondary hot runner plate (22), a secondary hot runner stripper plate (23) and a secondary fixed mold plate (24); A disposable movable mold assembly is provided below the disposable fixed mold assembly, and a secondary movable mold assembly is provided below the secondary fixed mold assembly. Both the disposable movable mold assembly and the secondary movable mold assembly are composed of a primary fixed mold plate (4), a movable mold plate (5), mold legs (6), a push rod plate (7), a push rod bottom plate (8) and a primary fixed mold taking plate (9).
2. A reciprocating lever structure two-color mold according to claim 1, characterized in that: A fixed mold core (10) is installed in the primary fixed mold plate (4).
3. The reciprocating lever structure two-color mold according to claim 1, characterized in that: A secondary mold fixed mold core (25) is installed in the secondary mold fixed mold plate (24).
4. The reciprocating lever structure two-color mold according to claim 1, characterized in that: A moving mold core (11) is installed in the moving mold plate (5), a cam connecting rod mechanism is provided on the side of the moving mold core (11), and a moving mold core assembly is provided below.
5. The reciprocating lever structure two-color mold according to claim 4, characterized in that: The cam-linkage mechanism is composed of a reset rod (14), a cam (15), a fixed shaft (16) and a support sleeve (17); the reset rod (14) is movably connected in the support sleeve (17); one end of the reset rod (14) cooperates with the reset block (13) of the primary fixed die; and a gap is provided between the reset rod (14) and the secondary fixed die plate (24); the cam (15) is installed below the support sleeve (17) through the fixed shaft (16); the lower end of the reset rod (14) acts on the cam (15); and the long-axis distance side of the cam (15) contacts the reset rod (14).
6. A reciprocating lever structure two-color mold according to claim 5, characterized in that: The movable core assembly is composed of a movable mold insert shaft (12), a guide column (18), a front ejector plate (19) and a front ejector bottom plate (20); the front ejector bottom plate (20) and the front ejector plate (19) are fastened by screws; the short wheelbase side of the cam (15) contacts the front ejector bottom plate (20); the movable mold insert shaft (12) and the guide column (18) are distributed left and right, and the movable mold insert shaft (12) and the guide column (18) are both fixed between the front ejector plate (19) and the front ejector bottom plate (20).
7. The reciprocating lever structure two-color mold according to claim 6, characterized in that: A gap is provided between the upper end of the guide column (18) and the primary fixed die plate (4), and the secondary fixed die plate (24) matches the gap.