Core-pulling secondary sliding block mechanism for automobile headrest plastic part injection mold

Abstract

The core-pulling secondary sliding block mechanism comprises a guide rail, a connecting plate, an oil cylinder, a first sliding block assembly, a second sliding block assembly and a shovel base, an oil cylinder body is connected with the connecting plate in a fastening mode, and the first sliding block assembly and the second sliding block assembly are connected with the guide rail in a sliding mode. The first sliding block assembly and the second sliding block assembly are connected in a fastened mode, the shovel base is connected with a movable mold plate of an injection mold and can be inserted into the first sliding block assembly, mold opening is conducted firstly, reverse buckle demolding of a first inserting buckle hole and a second inserting buckle hole is completed through the shovel base, then an oil cylinder shrinks to conduct demolding of a plastic part, and continuous completion of reverse buckle demolding and core pulling is achieved. The product demolding problem is not easy to occur, the demolding efficiency and the product yield are improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a core-pulling secondary slider mechanism for an injection mold for a plastic part of an automobile headrest. Background Art

[0002] like Figure 1 As shown, the automobile headrest plastic part 1-1 is provided with a first cavity 1-2 on one side, a first side cavity 1-3 is provided on the side of the first cavity 1-2, a first upper cavity 1-4 is provided on the first cavity 1-2, and first buckle holes 1-5 are provided at the upper and lower positions of the first cavity 1-2. A second cavity 1-6 is provided on the other side of the automobile headrest plastic part 1-1, a second side cavity 1-7 is provided on the side of the second cavity 1-6, a second upper cavity 1-8 is provided on the second cavity 1-6, and second buckle holes 1-9 are provided at the upper and lower positions of the second cavity 1-6.

[0003] Among them, the first cavity 1-2, the first side cavity 1-3, the first upper cavity 1-4, the second cavity 1-6, the second side cavity 1-7, and the second upper cavity 1-8 are all cavity structures with small inside and large outside. In addition, the first buckle hole 1-5 and the second buckle hole 1-9 need to be demolded before the core pulling work can be completed.

[0004] How to use a small position on a large position to demould the first buckle holes 1-5 and the second buckle holes 1-9 first, and then complete the core pulling of the large position, is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The present invention provides a core-pulling secondary slider mechanism for an injection mold of a plastic part of an automobile headrest, so as to solve the problems existing in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a core-pulling secondary slider mechanism for an injection mold for a car headrest plastic part, comprising a guide rail, a connecting plate, a cylinder, a first slider assembly, a second slider assembly and a shovel base, the cylinder body is fastened to the connecting plate, the first slider assembly and the second slider assembly are slidably connected to the guide rail, the first slider assembly and the second slider assembly are fastened, the shovel base is connected to the movable template of the injection mold, and can be inserted into the first slider assembly.

[0007] Preferably, the first slider assembly includes a first slider seat, a first wedge-shaped slider, a first upper buckle slider, a first lower buckle slider, a second wedge slider, a second upper buckle slider and a second lower buckle slider, the first slider seat is provided with a first through hole, a first step, a second through hole and a second step, the first wedge slider is slidably connected to the first through hole and is limited by the first step, the second wedge slider is slidably connected to the second through hole and is limited by the second step, the first upper buckle slider is arranged above the first wedge slider and is slidably connected to the first wedge slider through a dovetail groove structure, the first lower buckle slider is arranged below the first wedge slider and is slidably connected to the first wedge slider through a dovetail groove structure, the second upper buckle slider is arranged above the second wedge slider and is slidably connected to the second wedge slider through the dovetail groove structure, and the second upper buckle slider is arranged below the second wedge slider and is slidably connected to the second wedge slider through the dovetail groove structure.

[0008] Preferably, rear limit plates are respectively provided at the rear ends of the first through hole and the second through hole.

[0009] Preferably, a first limiting portion cooperating with the first step to limit the position is provided at the rear end of the first wedge-shaped slider; and a second limiting portion cooperating with the second step to limit the position is provided at the rear end of the second wedge-shaped slider.

[0010] Preferably, a vertical through hole is provided on the first slider seat; and an oblique through hole is provided in the middle of the first wedge-shaped slider and the second wedge-shaped slider.

[0011] Preferably, the second slider assembly includes a second slider seat, a main core-pulling slider 1, an upper core-pulling slider 1, a side core-pulling slider 1, a main core-pulling slider 2, an upper core-pulling slider 2 and a side core-pulling slider 2; the second slider seat is provided with a third through hole and a fourth through hole; the main core-pulling slider 1, the upper core-pulling slider 1 and the side core-pulling slider 1 are respectively limitedly plugged with the third through hole, and the main core-pulling slider 2, the upper core-pulling slider 2 and the side core-pulling slider 2 are respectively limitedly plugged with the fourth through hole; the main core-pulling slider 1 and the main core-pulling slider 2 are provided with a U-shaped groove, the first wedge-shaped slider, the first upper buckle slider and the first lower buckle slider are embedded in the U-shaped groove on the main core-pulling slider 1; the second wedge-shaped slider, the second upper buckle slider and the second lower buckle slider are embedded in the U-shaped groove on the main core-pulling slider 2.

[0012] Preferably, the connecting plate is symmetrically provided with a first mounting plate and a second mounting plate, the first mounting plate is provided with a first travel switch, and the second mounting plate is provided with a second travel switch; the first slider assembly is provided with a bracket, and the bracket is provided with a travel control rod

[0013] The beneficial effects of adopting the above technical solution are:

[0014] 1. The core-pulling secondary slider mechanism for the injection mold of the automobile headrest plastic part of the present invention adopts the method of first opening the mold and completing the undercut demoulding of the first buckle hole and the second buckle hole through the shovel base, and then the oil cylinder contracts to demould the plastic part, thereby realizing the continuous completion of undercut demoulding and core pulling, and is less likely to have product demoulding problems, thereby improving demoulding efficiency and product quality rate, and reducing production costs.

[0015] 2. The core-pulling secondary slider mechanism for the injection mold of the automobile headrest plastic part of the present invention drives the first wedge-shaped slider and the second wedge-shaped slider through the shovel base in the entire large sliding position of the mold opening, the first wedge-shaped slider drives the first upper buckle slider and the first lower buckle slider, and the second wedge-shaped slider drives the second upper buckle slider and the second lower buckle slider, so as to first demold the first buckle hole and the second buckle hole, and then realize the core pulling by contraction of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a plastic part of a car headrest in the background technology;

[0017] Figure 2 It is an assembly diagram of a core-pulling secondary slider mechanism for an injection mold for a plastic part of an automobile headrest of the present invention;

[0018] Figure 3 It is an exploded view of the core-pulling secondary slider mechanism for the injection mold of the automobile headrest plastic part of the present invention;

[0019] Figure 4 This is a mold closing flow chart of the core-pulling secondary slider mechanism for the injection mold of the automobile headrest plastic part;

[0020] Figure 5 It is an internal schematic diagram of the mold closing process of the core-pulling secondary slider mechanism for the injection mold of the automobile headrest plastic part;

[0021] in:

[0022] 1-1, automobile headrest plastic part; 1-2, first cavity; 1-3, first side cavity; 1-4, first upper cavity; 1-5, first buckle hole; 1-6, second cavity; 1-7, second side cavity; 1-8, second upper cavity; 1-9, second buckle hole;

[0023] 1. Guide rail; 2. Connecting plate; 3. Oil cylinder; 4. First slider assembly; 5. Second slider assembly; 6. Shovel base;

[0024] 20. First mounting plate; 20-1. First travel switch; 21. Second mounting plate; 21-1. Second travel switch; 22. Bracket; 23. Travel control lever;

[0025] 30. Connecting rod;

[0026] 4-1, first slider seat; 4-10, rear limit plate; 40, first through hole; 40-1, first step; 41, second through hole; 41-1, second step; 42, vertical through hole;

[0027] 4-2, first wedge-shaped slider; 43, first position-limiting portion; 44, first upper slider; 45, first lower slider;

[0028] 4-3, second wedge-shaped slider; 46, second position-limiting portion; 47, second upper slider; 48, second lower slider;

[0029] 400, oblique through hole;

[0030] 5-1, second slider seat; 50, third through hole; 51, fourth through hole; 5-2, main core-pulling slider 1; 5-3, upper core-pulling slider 1; 5-4, side core-pulling slider 1; 5-5, main core-pulling slider 2; 5-6, upper core-pulling slider 2; 5-7, side core-pulling slider 2; 500, U-shaped groove. DETAILED DESCRIPTION

[0031] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0032] like Figures 1 to 5 As shown, the present invention is a core-pulling secondary slider mechanism for an injection mold for a car headrest plastic part. The mechanism first opens the mold and completes the undercut demoulding of the first buckle hole and the second buckle hole by shoveling the base, and then the oil cylinder contracts to demould the plastic part, thereby achieving continuous completion of undercut demoulding and core pulling, making it less likely to have product demoulding problems, thereby improving demoulding efficiency and product quality rate, and reducing production costs.

[0033] Specifically, Figures 1 to 5 As shown, it includes a guide rail 1, a connecting plate 2, a cylinder 3, a first slider assembly 4, a second slider assembly 5 and a shovel base 6, the cylinder body of the cylinder 3 is fastened to the connecting plate 2, the first slider assembly 4 and the second slider assembly 5 are slidably connected to the guide rail 1, the first slider assembly 4 and the second slider assembly 5 are fastened, and the shovel base 6 is connected to the movable mold plate of the injection mold and can be inserted into the first slider assembly 4.

[0034] The first slider assembly 4 includes a first slider seat 4-1, a first wedge-shaped slider 4-2, a first upper buckle slider 44, a first lower buckle slider 45, a second wedge-shaped slider 4-3, a second upper buckle slider 47 and a second lower buckle slider 48. The first slider seat 4-1 is provided with a first through hole 40, a first step 40-1, a second through hole 41 and a second step 41-1. The first wedge-shaped slider 4-2 is slidably connected to the first through hole 40 and is limited by the first step 40-1. The second wedge-shaped slider 4-3 is slidably connected to the second through hole 41 and is limited by the second step 41-1. Limiting, the first upper buckle slider 44 is arranged above the first wedge-shaped slider 4-2, and is slidably connected to the first wedge-shaped slider 4-2 through a dovetail groove structure, the first lower buckle slider 45 is arranged below the first wedge-shaped slider 4-2, and is slidably connected to the first wedge-shaped slider 4-2 through a dovetail groove structure, the second upper buckle slider 47 is arranged above the second wedge-shaped slider 4-3, and is slidably connected to the second wedge-shaped slider 4-3 through a dovetail groove structure, the second upper buckle slider 47 is arranged below the second wedge-shaped slider 4-3, and is slidably connected to the second wedge-shaped slider 4-3 through a dovetail groove structure.

[0035] The rear ends of the first through hole 40 and the second through hole 41 are respectively provided with rear limiting plates 4 - 10 .

[0036] The first wedge-shaped slider 4-2 has a first limiting portion 43 at the rear end thereof for limiting the position in cooperation with the first step 40-1; the second wedge-shaped slider 4-3 has a second limiting portion 46 at the rear end thereof for limiting the position in cooperation with the second step 41-1.

[0037] A vertical through hole 42 is formed on the first slider seat 4 - 1 ; an oblique through hole 400 is formed in the middle of the first wedge-shaped slider 4 - 2 and the second wedge-shaped slider 4 - 3 .

[0038] The second slider assembly 5 includes a second slider seat 5-1, a main core-pulling slider 1 5-2, an upper core-pulling slider 1 5-3, a side core-pulling slider 1 5-4, a main core-pulling slider 2 5-5, an upper core-pulling slider 2 5-6 and a side core-pulling slider 2 5-7. The second slider seat 5-1 is provided with a third through hole 50 and a fourth through hole 51. The main core-pulling slider 1 5-2, the upper core-pulling slider 1 5-3 and the side core-pulling slider 1 5-4 are respectively limitedly plugged with the third through hole 50. The main core-pulling slider 2 5-5, the upper core-pulling slider 2 5-6 and the side core-pulling slider 2 5-7 are respectively limitedly plugged with the third through hole 50. The upper core-pulling slider 5-6 and the side core-pulling slider 5-7 are respectively plugged into the fourth through hole 51; the main core-pulling slider 1 5-2 and the main core-pulling slider 2 5-5 are provided with a U-shaped groove 500, and the first wedge-shaped slider 4-2, the first upper buckle slider 44, and the first lower buckle slider 45 are embedded in the U-shaped groove 500 on the main core-pulling slider 1 5-2; the second wedge-shaped slider 4-3, the second upper buckle slider 47, and the second lower buckle slider 48 are embedded in the U-shaped groove 500 on the main core-pulling slider 2 5-5.

[0039] The connecting plate 2 is symmetrically provided with a first mounting plate 20 and a second mounting plate 21, the first mounting plate 20 is provided with a first travel switch 20-1, and the second mounting plate 21 is provided with a second travel switch 21-1; the first slider assembly 4 is provided with a bracket 22, and the bracket 22 is provided with a travel control rod 23. The specific working method is described below with a specific embodiment:

[0040] Embodiment 1:

[0041] The core-pulling secondary slider mechanism for the automobile headrest plastic injection mold of the present invention has the following mold closing process:

[0042] Step S1: The oil cylinder 3 pushes the first slider assembly 4 and the second slider assembly 5 forward together through the connecting rod 30 until the travel control rod 23 triggers the first travel switch 20-1, and the oil cylinder 3 stops extending. At this time, the main core-pulling slider 1 5-2 is located at the first cavity 1-2 position of the automobile headrest plastic part to be injected, the upper core-pulling slider 1 5-3 is located at the first upper cavity 1-4 position of the automobile headrest plastic part to be injected, and the side core-pulling slider 1 5-4 is located at the first side cavity 1-3 position of the automobile headrest plastic part to be injected; the main core-pulling slider 2 5-5 is located at the second cavity 1-6 position of the automobile headrest plastic part to be injected, the upper core-pulling slider 2 5-6 is located at the second upper cavity 1-8 position of the automobile headrest plastic part to be injected, and the side core-pulling slider 2 5-7 is located at the second side cavity 1-7 position of the automobile headrest plastic part to be injected.

[0043] Step S2: The shovel base 6 enters the vertical through hole 42 in the first slider seat 4-1 during the mold closing process, and the mold closing action is buffered and decelerated. As the mold closing action continues, the shovel base 6 enters the oblique through hole 400 in the first wedge-shaped slider 4-2 and the second wedge-shaped slider 4-3, driving the first wedge-shaped slider 4-2 and the second wedge-shaped slider 4-3 to move forward. The first wedge-shaped slider 4-2 drives the first upper buckle slider 44 and the first lower buckle slider 45, and the second wedge-shaped slider 4-3 drives the second upper buckle slider 47 and the second lower buckle slider 48, thereby realizing the core filling action of the first buckle hole 1-5 and the second buckle hole 1-9.

[0044] Step S3: performing injection cooling.

[0045] The core-pulling secondary slider mechanism for the automobile headrest plastic injection mold of the present invention has the following mold opening process:

[0046] Step S11: As the mold opening process progresses, the shovel base 6 is pulled out from the oblique through hole 400 in the first wedge-shaped slider 4-2 and the second wedge-shaped slider 4-3, driving the first wedge-shaped slider 4-2 and the second wedge-shaped slider 4-3 to move backward, the first wedge-shaped slider 4-2 drives the first upper buckle slider 44 and the first lower buckle slider 45, and the second wedge-shaped slider 4-3 drives the second upper buckle slider 47 and the second lower buckle slider 48, thereby realizing the core pulling action of the first buckle hole 1-5 and the second buckle hole 1-9.

[0047] Step S11: The oil cylinder 3 pulls the first slider assembly 4 and the second slider assembly 5 to move backward together through the connecting rod 30 until the travel control rod 23 triggers the second travel switch 21-1, and the oil cylinder 3 stops contracting. At this time, the main core-pulling slider 1 5-2 is pulled out from the first cavity 1-2 of the automobile headrest plastic part, the upper core-pulling slider 1 5-3 is pulled out from the first upper cavity 1-4 of the automobile headrest plastic part, and the side core-pulling slider 1 5-4 is pulled out from the first side cavity 1-3 of the automobile headrest plastic part; the main core-pulling slider 2 5-5 is pulled out from the second cavity 1-6 of the automobile headrest plastic part, the upper core-pulling slider 2 5-6 is pulled out from the second upper cavity 1-8 of the automobile headrest plastic part, and the side core-pulling slider 2 5-7 is pulled out from the second side cavity 1-7 of the automobile headrest plastic part.

[0048] The core-pulling secondary slider mechanism for the automobile headrest plastic part injection mold of the present invention adopts the method of first opening the mold and completing the undercut demoulding of the first buckle hole 1-5 and the second buckle hole 1-9 through the shovel base 6, and then the oil cylinder 3 contracts to demould the plastic part, thereby realizing the continuous completion of undercut demoulding and core pulling, making it less likely to have product demoulding problems, improving demoulding efficiency and product quality rate, and reducing production costs.

[0049] Embodiment 2:

[0050] The core-pulling secondary slider mechanism for the injection mold of the automobile headrest plastic part of the present invention drives the first wedge-shaped slider 4-2 and the second wedge-shaped slider 4-3 through the shovel base 6 in the entire large sliding position of the mold opening, the first wedge-shaped slider 4-2 drives the first upper buckle slider 44 and the first lower buckle slider 45, and the second wedge-shaped slider 4-3 drives the second upper buckle slider 47 and the second lower buckle slider 48, so as to first demold the first buckle hole 1-5 and the second buckle hole 1-9, and then realize core pulling by contraction of the cylinder.

[0051] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A core-pulling secondary slider mechanism for an injection mold for a car headrest plastic part, characterized in that: The invention comprises a guide rail (1), a connecting plate (2), an oil cylinder (3), a first slider assembly (4), a second slider assembly (5) and a shovel base (6); the cylinder body of the oil cylinder (3) is firmly connected to the connecting plate (2); the first slider assembly (4) and the second slider assembly (5) are slidably connected to the guide rail (1); the first slider assembly (4) and the second slider assembly (5) are firmly connected; and the shovel base (6) is connected to a movable mold plate of an injection mold and can be inserted into the first slider assembly (4).

2. The core-pulling secondary slider mechanism for an automobile headrest plastic injection mold according to claim 1, characterized in that: The first slider assembly (4) comprises a first slider seat (4-1), a first wedge-shaped slider (4-2), a first upper buckle slider (44), a first lower buckle slider (45), a second wedge-shaped slider (4-3), a second upper buckle slider (47) and a second lower buckle slider (48); the first slider seat (4-1) is provided with a first through hole (40), a first step (40-1), a second through hole (41) and a second step (41-1); the first wedge-shaped slider (4-2) is slidably connected to the first through hole (40) and is limited by the first step (40-1); the second wedge-shaped slider (4-3) is slidably connected to the second through hole (41) and is limited by the second step (41-1); The first upper buckle slider (44) is arranged above the first wedge-shaped slider (4-2) and is slidably connected to the first wedge-shaped slider (4-2) through a dovetail groove structure; the first lower buckle slider (45) is arranged below the first wedge-shaped slider (4-2) and is slidably connected to the first wedge-shaped slider (4-2) through a dovetail groove structure; the second upper buckle slider (47) is arranged above the second wedge-shaped slider (4-3) and is slidably connected to the second wedge-shaped slider (4-3) through a dovetail groove structure; the second upper buckle slider (47) is arranged below the second wedge-shaped slider (4-3) and is slidably connected to the second wedge-shaped slider (4-3) through a dovetail groove structure.

3. The core-pulling secondary slider mechanism for an automobile headrest plastic injection mold according to claim 2, characterized in that: Rear limit plates (4-10) are respectively provided at the rear ends of the first through hole (40) and the second through hole (41).

4. The core-pulling secondary slider mechanism for an automobile headrest plastic injection mold according to claim 2, characterized in that: The first wedge-shaped slider (4-2) has a first limiting portion (43) at the rear end thereof for limiting the position in cooperation with the first step (40-1); and the second wedge-shaped slider (4-3) has a second limiting portion (46) at the rear end thereof for limiting the position in cooperation with the second step (41-1).

5. The core-pulling secondary slider mechanism for an automobile headrest plastic injection mold according to claim 2, characterized in that: A vertical through hole (42) is provided on the first slider seat (4-1); and an oblique through hole (400) is provided in the middle of the first wedge-shaped slider (4-2) and the second wedge-shaped slider (4-3).

6. The core-pulling secondary slider mechanism for an automobile headrest plastic injection mold according to claim 2, characterized in that: The second slider assembly (5) comprises a second slider seat (5-1), a main core-pulling slider 1 (5-2), an upper core-pulling slider 1 (5-3), a side core-pulling slider 1 (5-4), a main core-pulling slider 2 (5-5), an upper core-pulling slider 2 (5-6) and a side core-pulling slider 2 (5-7); the second slider seat (5-1) is provided with a third through hole (50) and a fourth through hole (51); the main core-pulling slider 1 (5-2), the upper core-pulling slider 1 (5-3) and the side core-pulling slider 1 (5-4) are respectively limitedly plugged with the third through hole (50); the main core-pulling slider 2 (5-5), the upper core-pulling slider 2 (5-6) and the side core-pulling slider 2 (5-7) are respectively limitedly plugged with the third through hole (50); The upper core-pulling slider 2 (5-6) and the side core-pulling slider 2 (5-7) are respectively plugged into the fourth through hole (51) in a limited manner; the main core-pulling slider 1 (5-2) and the main core-pulling slider 2 (5-5) are provided with a U-shaped groove (500); the first wedge-shaped slider (4-2), the first upper buckle slider (44), and the first lower buckle slider (45) are embedded in the U-shaped groove (500) on the main core-pulling slider 1 (5-2); the second wedge-shaped slider (4-3), the second upper buckle slider (47), and the second lower buckle slider (48) are embedded in the U-shaped groove (500) on the main core-pulling slider 2 (5-5).

7. The core-pulling secondary slider mechanism for an automobile headrest plastic injection mold according to claim 1, characterized in that: A first mounting plate (20) and a second mounting plate (21) are symmetrically arranged on the connecting plate (2), the first mounting plate (20) is provided with a first travel switch (20-1), and the second mounting plate (21) is provided with a second travel switch (21-1); a bracket (22) is provided on the first slider assembly (4), and a travel control rod (23) is provided on the bracket (22).

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