In-mold compression two-color injection mold

Abstract

The present invention discloses an in-mold compression double-color injection mold, comprising a front mold, a rear mold, a first main insert, a second main insert, a main insert driving mechanism and an ejection mechanism. The front mold and the rear mold are arranged oppositely, and the first main insert and the second main insert are adjacently arranged in the front mold and slidably cooperate with the front mold. A front mold cavity is respectively provided on the side of the first main insert and the second main insert close to the rear mold. A first rear mold core and a second rear mold core are provided on the side of the rear mold close to the front mold, and the first and second rear mold cores are adjacently arranged at intervals. Two main insert driving mechanisms are symmetrically provided on the side of the first main insert and the second main insert away from the rear mold, and each main insert driving mechanism drives the corresponding main insert to slide relative to the front mold along the mold opening direction. The present invention expands the volume of the injection cavity by changing the position of the main insert, reduces the requirement for injection force, and realizes rapid filling of the flow material during the main insert resetting process after the injection is completed, realizes high molding density of the product, reduces the requirement for the injection molding machine, and improves efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mold manufacturing, and in particular to an in-mold compression double-color injection mold. Background Art

[0002] The two-color textured trim in the car cab is a two-color structure. The two-color structure requires two injections of different materials. The first injection is PC material, and the second injection is PC+ABS material. Since the thickness of the two materials is relatively thin, the product after injection molding requires a higher density. Therefore, a larger injection force is required during the injection molding process. The flow and filling capacity of the injection molding process is poor, the flow rate is slow, and the high density requirements of the product after molding cannot be met, and the production efficiency is low. The existing injection molding machine usually does not have the required injection force, and a larger injection molding machine needs to be used, which increases the cost of equipment investment. Therefore, the existing technology urgently needs to be further improved. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to propose an in-mold compression two-color injection mold to solve the problems of high density of two-color product parts, poor flow and filling ability during the injection molding process, slow flow rate, inability to meet the high density requirements of product parts after molding, and low production efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] The invention discloses an in-mold compression double-color injection mold, comprising a front mold, a rear mold, a first main insert, a second main insert, a main insert driving mechanism and an ejection mechanism. The front mold and the rear mold are arranged opposite to each other, and the first main insert and the second main insert are adjacently and spacedly arranged in the front mold and slidably cooperate with the front mold.

[0006] A front mold cavity is respectively provided on one side of the first main inlay and the second main inlay close to the rear mold.

[0007] The rear mold has a first rear mold core and a second rear mold core on one side of the rear mold close to the front mold, and the first and second rear mold cores are arranged adjacently and spaced apart.

[0008] Two main inlay driving mechanisms are symmetrically arranged on the side of the first main inlay and the second main inlay facing away from the rear mold, and each main inlay driving mechanism drives the corresponding main inlay to slide relative to the front mold along the mold opening direction.

[0009] Furthermore, in the mold closing state, the first rear mold core can cooperate with the two front mold cavities to form a first injection molding cavity, and a first injection molding part is molded in the first injection molding cavity, and the first injection molding part remains in the front mold cavity.

[0010] The second rear mold core can cooperate with the two front mold cavities and the first injection molded part remaining in the front mold cavity to form a second injection molded cavity, and the second injection molded part is molded in the second injection molded cavity.

[0011] Furthermore, the outer side wall of the first rear mold core and the inner side wall of each front mold cavity cooperate to form a parting surface of the first injection molding cavity.

[0012] The outer side wall of the second rear mold core and the inner side wall of each front mold cavity cooperate to form a parting surface of the second injection molding cavity.

[0013] Furthermore, any position of the outer side walls of the first and second rear mold cores is parallel to the corresponding position of the inner side walls of each front mold cavity.

[0014] The angle between the outer side wall of the front mold cavity and the opening direction of the front mold is α, 1.8°≤α≤2°.

[0015] Furthermore, the main insert driving mechanism includes a T-shaped guide rail, a core puller and a driving cylinder. The T-shaped guide rail is fixed on the corresponding main insert, and the sliding groove direction of the T-shaped guide rail is arranged relatively inclined to the mold opening direction.

[0016] The core pulling device is arranged on the front mold and is slidably matched with the front mold. Meanwhile, the core pulling device extends into the slide groove of the T-shaped guide rail and is slidably matched with the T-shaped guide rail.

[0017] The driving cylinder is installed on the front mold through the cylinder bracket, and the end of its piston rod is fixedly connected to the core puller. The two driving cylinders on the same main insert are retracted and extended synchronously to drive the main insert to move relative to the front mold along the mold opening direction.

[0018] Furthermore, a group of travel switches is provided on one side of each core pulling device, and each group of travel switches includes two travel switches arranged at a relative interval along the core pulling movement direction.

[0019] Each of the core pullers is provided with a travel rod, one end of which is fixedly connected to the core puller, and the other end of which extends between two travel switches corresponding to the core puller.

[0020] Furthermore, there are two ejection mechanisms, namely a first ejection mechanism and a second ejection mechanism, and both ejection mechanisms are arranged on the rear mold.

[0021] Furthermore, the first ejector mechanism corresponds to the position of the first rear mold core, and comprises a first ejector plate, a first ejector rod group and a first oil injection cylinder, wherein the first ejector plate is located on the side of the rear mold away from the front mold.

[0022] The first oil-shooting cylinder is installed on one side of the rear mold, and its piston rod drives the first ejector plate to move along the mold opening direction.

[0023] The first ejector rod group includes a plurality of first ejector rods, one end of each of which is fixed on the first ejector pin plate, and the other end of each of which extends into the rear mold and slidably cooperates with the rear mold, wherein some of the first ejector rods are provided with inclined ejector blocks.

[0024] Furthermore, the second ejector mechanism corresponds to the position of the second rear mold core, and comprises a second ejector plate, a second ejector rod group and a second oil injection cylinder, wherein the second ejector plate is located on the side of the rear mold away from the front mold.

[0025] The second oil-shooting cylinder is installed on one side of the rear mold, and its piston rod drives the second ejector plate to move along the mold opening direction.

[0026] The second ejector rod group includes a plurality of second ejector rods, one end of each of which is fixed to the first ejector pin plate, and the other end of each of which extends into the rear mold and slidably cooperates with the rear mold.

[0027] Furthermore, the first main inlay and the second main inlay are both slidably matched with the front mold along the mold opening direction.

[0028] By adopting the above technical scheme, the beneficial technical effect of the present invention is as follows: the present invention arranges the first main inlay and the second main inlay in the front mold, and the volume of the injection cavity is expanded by changing the position of the main inlay during the injection molding process, thereby reducing the requirement for injection force, and after the injection molding is completed, the flow material is quickly filled during the resetting process of the main inlay, thereby achieving a high molding density of the product, reducing the requirement for the injection molding machine, and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a schematic diagram of the structural principle of an in-mold compression double-color injection mold.

[0030] Figure 2 It is a structural schematic diagram of the fixed mold and its related components of the present invention.

[0031] Figure 3 It is a structural schematic diagram of the movable mold and related components of the present invention.

[0032] Figure 4 It is a schematic cross-sectional view of a part of the present invention, showing the first main setting and the main setting driving mechanism.

[0033] Figure 5 It is a structural schematic diagram of the first main setting, the second main setting and the main setting driving mechanism of the present invention. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings:

[0035] Combination Figures 1 to 5An in-mold compression two-color injection mold, the injection mold is a flip mold, which includes a front mold 1, a rear mold 2, a first main insert 3, a second main insert 4, a main insert driving mechanism 5 and an ejection mechanism. The front mold 1 and the rear mold 2 are arranged opposite to each other in a positive direction and are both installed on an injection molding machine. The front mold 1 is a movable mold, and the rear mold 2 is a fixed mold. The injection molding machine drives the front mold 1 to move and complete mold opening and closing with the rear mold 2. There are two ejection mechanisms, namely a first ejection mechanism 6 and a second ejection mechanism 7, and both ejection mechanisms are arranged on the rear mold 2.

[0036] The first main insert 3 and the second main insert 4 are arranged adjacently and movably in the front mold 1, and both are slidably matched with the front mold 1 along the mold opening direction. The first main insert 3 and the second main insert 4 are respectively provided with a front mold cavity 31 on the side close to the rear mold 2, and the two front mold cavities 31 have the same structure and are centrally symmetrical. The rear mold 2 has a first rear mold core 21 and a second rear mold core 22 on the side close to the front mold 1, and the first and second rear mold cores 22 are arranged adjacently and spaced apart, and are an integral structure with the rear mold 2. The hot runner and gate of the injection mold are both located in the rear mold 2.

[0037] In the mold closing state, the first rear mold core 21 can cooperate with the two front mold cavities 31 to form a first injection molding cavity, and the first injection molding part is molded in the first injection molding cavity. After the injection molding of the first injection molding part is completed, the front mold 1 and the rear mold 2 are opened, and the first injection molding part remains in the front mold cavity 31. The outer wall of the first rear mold core 21 and the inner wall of each front mold cavity 31 cooperate to form the parting surface of the first injection molding cavity. During the injection molding process, the parting surface seals the first injection molding cavity.

[0038] The rear mold 2 can be rotated 180° relative to the front mold and then closed again. The second rear mold core 22 can cooperate with the two front mold cavities 31 and the first injection molded part remaining in the front mold cavity 31 to form a second injection molded cavity, and the second injection molded part is formed in the second injection molded cavity. The outer wall of the second rear mold core 22 and the inner wall of each front mold cavity 31 cooperate to form a parting surface of the second injection molded cavity. During the injection molding process, the parting surface seals the second injection molded cavity, and the second injection molded part and the first injection molded part form a two-color textured decorative part with an integrated structure.

[0039] Any position of the outer wall of the first and second rear mold cores 22 is parallel to the corresponding position of the inner wall of each front mold cavity 31. The angle between the outer wall of the front mold cavity 31 and the mold opening direction of the front mold 1 is α, 1°≤α≤2°.

[0040] Two main insert driving mechanisms 5 are symmetrically arranged on the side of the first main insert 3 and the second main insert 4 facing away from the rear mold 2. Each main insert driving mechanism 5 drives the corresponding main insert to slide relative to the front mold 1 along the mold opening direction. The main insert driving mechanism 5 includes a T-shaped guide rail 51, a core puller 52 and a driving cylinder 53. Each T-shaped guide rail 51 is fixed on the corresponding main insert, and the sliding groove direction of the T-shaped guide rail 51 is arranged relatively inclined with respect to the mold opening direction.

[0041] The core puller 52 is arranged on the front mold 1 and slides with the front mold 1. The movement direction of the core puller 52 relative to the front mold 1 is perpendicular to the mold opening direction. At the same time, the core puller 52 extends into the slide groove of the T-shaped guide rail 51 and slides with the T-shaped guide rail 51. The angle between the slide groove direction of the T-shaped guide rail 51 and the movement direction of the core puller 52 is 3°. The driving cylinder 53 is installed on the front mold 1 through the driving cylinder bracket 531. The end of its piston rod is fixedly connected to the core puller 52. The two driving cylinders 53 on the same main insert are synchronously extended and retracted to drive the main insert to move relative to the front mold 1 along the mold opening direction to change the size of the first injection molding cavity or the second injection molding cavity.

[0042] Specifically, after the front mold 1 and the rear mold 2 are closed, the first main inlay 3 or the second main inlay 4 moves 1 mm relative to the front mold 1 along the mold opening direction under the drive of the core pulling 52, the thickness of the first or second injection molding cavity increases by 1 mm, and a gap of 0.017 mm is generated on the parting surface. The gap of 0.017 mm will not cause glue leakage, and the injection pressure is small during the injection process. After the injection is completed, the core pulling 52 drives the first main inlay 3 or the second main inlay 4 to return to its original position, and the parting surfaces are fitted.

[0043] A set of travel switches 54 is provided on one side of each core puller 52, and each set of travel switches 54 includes two travel switches 54 arranged relatively spaced apart along the moving direction of the core puller 52, and each travel switch 54 is fixedly mounted on the front mold 1. Each core puller 52 is provided with a travel rod 55, one end of which is fixedly connected to the core puller 52, and the other end extends between the two travel switches 54 corresponding to the core puller 52. The core puller 52 drives the travel rod 55 to move together during its movement, and the travel rod 55 cooperates with the corresponding two travel switches 54 to control the travel of the core puller 52.

[0044] The first ejector mechanism 6 corresponds to the position of the first rear mold core 21, and includes a first ejector plate 61, a first ejector rod group, and a first ejector cylinder 62. The first ejector plate 61 is located on the side of the rear mold 2 away from the front mold 1. The first ejector cylinder 62 is installed on one side of the rear mold 2, and its piston rod drives the first ejector plate 61 to move along the mold opening direction. The first ejector rod group includes a plurality of first ejector rods 63, one end of the first ejector rod 63 is fixed on the first ejector plate 61, and the other end extends into the rear mold 2 and slidably cooperates with it, and some of the first ejector rods 63 are provided with inclined ejector blocks 64.

[0045] The second ejector mechanism 7 corresponds to the position of the second rear mold core 22, and includes a second ejector plate 71, a second ejector rod group and a second ejector cylinder 72. The second ejector plate 71 is located on the side of the rear mold 2 away from the front mold 1. The second ejector cylinder 72 is installed on one side of the rear mold 2, and its piston rod drives the second ejector plate 71 to move along the mold opening direction. The second ejector rod group includes a plurality of second ejector rods 73, one end of which is fixed on the first ejector plate 61, and the other end extends into the rear mold 2 and slides with it.

[0046] Parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0049] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An in-mold compression double-color injection mold, characterized in that: It comprises a front mold, a rear mold, a first main inlay, a second main inlay, a main inlay driving mechanism and an ejection mechanism, the front mold and the rear mold are arranged opposite to each other, and the first main inlay and the second main inlay are adjacently and spaced and movably arranged in the front mold; A front mold cavity is respectively provided on one side of the first main inlay and the second main inlay close to the rear mold; The rear mold has a first rear mold core and a second rear mold core on one side close to the front mold, and the first and second rear mold cores are arranged adjacently and spaced apart; The first main inlay and the second main inlay are both symmetrically provided with two main inlay driving mechanisms on one side away from the rear mold, and each main inlay driving mechanism drives the corresponding main inlay to slide relative to the front mold along the mold opening direction; The main insert driving mechanism includes a T-shaped guide rail, a core puller and a driving cylinder. The T-shaped guide rail is fixed on the corresponding main insert, and the sliding groove direction of the T-shaped guide rail is arranged relatively inclined with respect to the mold opening direction. The core pulling device is arranged on the front mold and is slidably matched with the front mold. At the same time, the core pulling device extends into the slide groove of the T-shaped guide rail and is slidably matched with the T-shaped guide rail. The driving oil cylinder is installed on the front mold through the oil cylinder bracket, and the end of its piston rod is fixedly connected to the core puller. The two driving oil cylinders on the same main insert are synchronously extended and retracted to drive the main insert to move relative to the front mold along the mold opening direction; The first main inlay and the second main inlay are both slidably matched with the front mold along the mold opening direction; In the mold closing state, the first rear mold core can cooperate with the two front mold cavities to form a first injection molding cavity, and a first injection molding part is molded in the first injection molding cavity, and the first injection molding part remains in the front mold cavity; The outer side wall of the first rear mold core and the inner side wall of each front mold cavity cooperate to form a parting surface of the first injection molding cavity. During the injection molding process, the parting surface seals the first injection molding cavity. The rear mold can be rotated 180° relative to the front mold and then closed again. The second rear mold core can cooperate with the two front mold cavities and the first injection-molded part remaining in the front mold cavity to form a second injection-molded cavity, and the second injection-molded part is molded in the second injection-molded cavity; the outer wall of the second rear mold core and the inner wall of each front mold cavity cooperate to form a parting surface of the second injection-molded cavity. During the injection molding process, the parting surface seals the second injection molding cavity, and the second injection-molded part and the first injection-molded part form a two-color textured ornament with an integrated structure.

2. The in-mold compression double-color injection mold according to claim 1, characterized in that: Any position of the outer side walls of the first and second rear mold cores is parallel to the corresponding position of the inner side walls of each front mold cavity; The angle between the outer side wall of the front mold cavity and the opening direction of the front mold is α, 1.8°≤α≤2°.

3. The in-mold compression double-color injection mold according to claim 1, characterized in that: A set of travel switches is provided on one side of each core pulling device, and each set of travel switches includes two travel switches arranged relatively spaced apart along the core pulling movement direction; Each of the core pullers is provided with a travel rod, one end of which is fixedly connected to the core puller, and the other end of which extends between two travel switches corresponding to the core puller.

4. The in-mold compression double-color injection mold according to claim 1, characterized in that: There are two ejection mechanisms, namely a first-shot ejection mechanism and a second-shot ejection mechanism, and both ejection mechanisms are arranged on the rear mold.

5. The in-mold compression double-color injection mold according to claim 4, characterized in that: The first ejector mechanism corresponds to the position of the first rear mold core, and comprises a first ejector plate, a first ejector rod group and a first oil injection cylinder, wherein the first ejector plate is located on the side of the rear mold away from the front mold; The first oil-shooting cylinder is installed on one side of the rear mold, and its piston rod drives the first ejector plate to move along the mold opening direction; The first ejector rod group includes a plurality of first ejector rods, one end of each of which is fixed on the first ejector pin plate, and the other end of each of which extends into the rear mold and slidably cooperates with the rear mold, wherein some of the first ejector rods are provided with inclined ejector blocks.

6. The in-mold compression double-color injection mold according to claim 4, characterized in that: The second ejector mechanism corresponds to the position of the second rear mold core, and comprises a second ejector plate, a second ejector rod group and a second oil injection cylinder, wherein the second ejector plate is located on the side of the rear mold away from the front mold; The second oil-shooting cylinder is installed on one side of the rear mold, and its piston rod drives the second ejector plate to move along the mold opening direction; The second ejector rod group includes a plurality of second ejector rods, one end of each of which is fixed to the first ejector pin plate, and the other end of each of which extends into the rear mold and slidably cooperates with the rear mold.

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