Inclined hole core-pulling mechanism and injection mold

Abstract

The utility model provides an inclined hole core-pulling mechanism and an injection mold. The inclined hole core-pulling mechanism comprises a shovel base, a sliding rail, a sliding seat, a forming sliding block, an inclined hole core-pulling assembly and a delay linkage assembly, the sliding seat is arranged on the sliding rail so as to be limited to slide back and forth in the first direction, and the shovel base and the sliding seat are in inclined guide fit; the forming sliding block is connected with the sliding base through a delay linkage assembly so that the sliding base can drive the forming sliding block to move synchronously after moving by a certain displacement in the first direction. The forming sliding block is provided with a forming part and an inclined hole penetrating through the forming part, and the sliding base is provided with an inclined support stretching into the bottom of the inclined hole. The inclined hole core-pulling assembly comprises a forming column and a core-pulling spring, the forming column is assembled in the inclined hole, and the core-pulling spring applies elastic force towards the bottom to the forming column so that the forming column can abut against the inclined support of the sliding base. Two times of core pulling can be completed by one set of mechanism; and the structure is greatly simplified.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an inclined hole core pulling mechanism and an injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and obtaining a molded product after cooling and solidification.

[0003] In the mold, the molding slider on the side of the product is often pulled out by lateral core pulling. However, if a molding column for molding is also provided on the molding slider, when the mold is opened, the molding column on the molding slider needs to be core pulled once, and then the molding slider and the molding column that have completed the core pulling once need to be core pulled twice synchronously. At present, with the existing structure, each of the above two core pullings requires a set of core pulling mechanisms to be realized; the structure is complex, there are many assembly steps, and delayed actions are required, and the slider is easy to hit the mold, which greatly affects the product yield and productivity. Utility Model Content

[0004] Therefore, the utility model provides an inclined hole core pulling mechanism and an injection mold to solve the above problems.

[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0006] A mechanism for pulling out a core through an inclined hole comprises a shovel base, a slide rail, a slide seat, a forming slider, an inclined hole core pulling assembly and a delayed linkage assembly; the slide seat is arranged on the slide rail so as to be restricted to slide back and forth in a first direction, and the shovel base and the slide seat form an inclined guide fit; the forming slider is connected to the slide seat through a delayed linkage assembly, so that the slide seat moves a certain displacement in the first direction and then drives the forming slider to move synchronously; the forming slider is provided with a forming part and an inclined hole penetrating the forming part, and the slide seat has an inclined support extending into the bottom of the inclined hole; the inclined hole core pulling assembly comprises a forming column and a core pulling spring, the forming column is assembled in the inclined hole, and the core pulling spring applies an elastic force toward the bottom to the forming column, so that the top of the forming column is against the inclined support of the slide seat.

[0007] Furthermore, a first mounting cavity with a larger aperture than the inclined hole is provided at the bottom of the molding slider, an abutment end cap is provided at the bottom of the molding column, the core-pulling spring is sleeved on the molding column and accommodated in the first mounting cavity, and the two ends of the core-pulling spring respectively abut against the top inner wall of the first mounting cavity and the abutment end cap.

[0008] Furthermore, the delay linkage assembly includes a limit screw and a support spring, the limit screw is passed through the slide seat and fixedly connected to the forming slider through the first end; the second end of the limit screw forms a limit end cap, the slide seat has a limit step corresponding to the limit end cap, when the slide seat and the forming slider are against each other, the limit end cap and the limit step are arranged at a distance, and the support spring is arranged between the slide seat and the forming slider and applies an elastic force to the forming slider away from the slide seat.

[0009] Furthermore, the support spring is sleeved on the limit screw.

[0010] Furthermore, the slide seat is provided with a second installation cavity on a side facing the forming slide block, and the support spring is accommodated in the second installation cavity.

[0011] Furthermore, a guide structure extending along the first direction is provided between the slide seat and the forming slide block.

[0012] Furthermore, the guide structure includes a guide column fixed on the forming slide block and a guide hole provided on the slide seat, and the guide column is fitted in the guide hole.

[0013] Furthermore, the slide seat is provided with a T-shaped oblique guide groove on a side away from the forming slide block, and a T-shaped block is slidably mounted in the T-shaped oblique guide groove, and the T-shaped block is fixedly connected to the shovel base.

[0014] An injection mold includes a front mold and a rear mold, and also includes the inclined hole core pulling mechanism described above. The slide rail, slide seat and molding slider are assembled on the rear mold, and the shovel base is fixed on the front mold. The opening and closing actions of the front mold and the rear mold drive the slide seat to slide on the slide rail.

[0015] The technical solution provided by the utility model has the following beneficial effects:

[0016] When the mold is opened, the slide is driven to be pulled out a certain distance by the shovel base line, and the withdrawal of the oblique support causes the forming column to complete a core pulling under the action of the core pulling spring; then, the continued withdrawal of the slide drives the forming slider and the oblique hole core pulling assembly thereon to perform a second core pulling through the delayed linkage assembly; finally, two core pullings are completed with one set of mechanism; the structure is greatly simplified, which effectively improves the product yield and productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows the assembly structure diagram of the inclined hole core pulling mechanism in the embodiment;

[0018] Figure 2 The figure shows a schematic diagram of the structural decomposition of the inclined hole core pulling mechanism in the embodiment;

[0019] Figure 3The figure shows a schematic diagram of the structure of the slide in the embodiment;

[0020] Figure 4 The figure shows a partial structural cross-section of the inclined hole core pulling mechanism in the embodiment in the mold closing state. Figure 1 ;

[0021] Figure 5 The figure shows a partial structural cross-section of the inclined hole core pulling mechanism in the embodiment in the mold closing state. Figure 2 ;

[0022] Figure 6 The figure shows a partial structural cross-section of the inclined hole core pulling mechanism in the embodiment after one core pulling. Figure 1 ;

[0023] Figure 7 The figure shows a partial structural cross-section of the inclined hole core pulling mechanism in the embodiment after one core pulling. Figure 2 . DETAILED DESCRIPTION

[0024] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0025] In the description of the present invention, terms such as "up", "down", "left", "right", "front", "back", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, 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 cannot be understood as a limitation of the present invention.

[0026] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0027] Reference Figures 1 to 7 As shown, the present embodiment provides an inclined hole core pulling mechanism, comprising a shovel base 11, a slide rail 41, a slide seat 20, a forming slider 30, an inclined hole core pulling assembly 50 and a delayed linkage assembly 60; the slide seat 20 is arranged on the slide rail 41 to be restricted to reciprocate sliding in a first direction (defined as a horizontal direction), and the shovel base 11 and the slide seat 20 form an inclined guide fit; specifically, in the present embodiment, the shovel base 11 and the slide seat 20 are vertically arranged, that is, the shovel base 11 is vertically arranged, and the movement of the shovel base 11 in the vertical direction drives the slide seat 20 to slide reciprocatingly in the horizontal direction.

[0028] The forming slider 30 is connected to the slide seat through a delayed linkage component 60, so that the slide seat 20 moves a certain displacement in the first direction and then drives the forming slider 30 to move synchronously; that is, the function of the delayed linkage component 60 is: when pulling the core, the slide seat 20 is pulled out a certain distance under the drive of the shovel base 11, and then the forming slider 30 is linked with the slide seat 20, and then the slide seat 20 continues to pull the core and drives the forming slider 30 to be pulled out together.

[0029] The molding slide block 30 is provided with a molding portion and an oblique hole 32 penetrating the molding portion. Specifically, the molding portion is a concave surface 31. The slide seat 20 has an oblique support 21 extending into the bottom of the oblique hole 32; the oblique hole core pulling assembly 50 includes a molding column 51 and a core pulling spring 52. The molding column 51 is assembled in the oblique hole 32. The core pulling spring 52 applies an elastic force toward the bottom of the molding column 51, so that the molding column 51 presses against the oblique support 21 of the slide seat 20.

[0030] This embodiment also provides an injection mold, including a front mold and a rear mold, and also includes the above-mentioned inclined hole core pulling mechanism, the slide rail 41, the slide seat 20 and the molding slider 30 are assembled on the rear mold, the shovel base 11 is fixed on the front mold, and the opening and closing actions of the front mold and the rear mold drive the slide seat 20 to slide on the slide rail 41. The inclined hole core pulling mechanism is a lateral core pulling structure of the injection mold.

[0031] When the front mold and the rear mold are closed, the slide 20 is driven by the shovel base 11 to move close to the molding slider 30, so that the molding column 51 is ejected to the concave surface 31 protruding from the molding slider 30 through the oblique support 21, as shown in FIG. Figure 4 Afterwards, the slide 20 abuts against the molding slide 30 and drives the molding slide 30 to reach the injection molding position.

[0032] When the front mold and the rear mold are opened, the sliding seat 20 is driven by the shovel base 11 to move away from the forming slider 30. During the process, the movement of the oblique support 21 forms a gap, and the forming column 51 moves toward the bottom of the forming slider 30 under the drive of the core pulling spring 52, thereby pulling away from the concave surface 31 of the forming slider 30. Figure 6 As shown, the molding column 51 is separated from the product to achieve a core pulling; specifically, at this time, the oblique support 21 will not be completely separated, and it still supports the molding column 51 to prevent the molding column 51 and the core pulling spring 52 from falling. Afterwards, the front mold and the rear mold continue to open the mold, so that the slide 20 is linked with the molding slider 30 through the delayed linkage component 60, so that the slide 20 drives the molding slider 30 to move together with the core pulling, and the secondary core pulling is achieved.

[0033] Specifically, in this embodiment, the bottom of the molding slider 30 is provided with a first installation cavity with a larger aperture than the inclined hole 32, the bottom of the molding column 51 is provided with an abutting end cap 511, the core-pulling spring 52 is sleeved on the molding column 51 and accommodated in the first installation cavity, and the two ends of the core-pulling spring 52 are respectively abutted against the top inner wall of the first installation cavity and the abutting end cap 511. In this way, the core-pulling spring 52 is stably installed.

[0034] In this embodiment, the delay linkage assembly 60 includes a limit screw 61 and a support spring 62. The limit screw 61 is inserted into the slide 20 and fixedly connected to the forming slider 30 through the first end. The second end of the limit screw 61 forms a limit end cap 611. The slide 20 has a limit step 201 corresponding to the limit end cap 611. When the slide 20 and the forming slider 30 are against each other, the limit end cap 611 and the limit step 201 are spaced apart. The support spring 62 is arranged between the slide 20 and the forming slider 30 and applies an elastic force to the forming slider 30 away from the slide 20. Figure 5 As shown in FIG. 1 , in the mold closing state, the molding slider 30 abuts against the slide seat 20, and the limiting end cap 611 of the limiting screw 61 is spaced apart from the limiting step 201. When the slide seat 20 starts to move away from the molding slider 30, the molding slider 30 remains stationary under the action of the supporting spring 62, and the spacing between the limiting step 201 and the limiting end cap 611 gradually decreases until they abut against each other, as shown in FIG. Figure 7 As shown; at this time, the forming slider 30 and the slide seat 20 form a linkage. Afterwards, the continued core pulling and translation of the slide seat 20 drives the forming slider 30 to move together. Such a setting has a simple and ingenious structural design.

[0035] Specifically, the slide seat 20 is provided with a second installation cavity 23 on the side facing the forming slider 30, and the support spring 62 is accommodated in the second installation cavity 23 to achieve hidden installation; at the same time, the support spring 62 is sleeved on the limit screw 61 to achieve stable installation of the support spring 62.

[0036] Of course, in other embodiments, the structure of the delayed linkage component 60 is not limited thereto, and other structures capable of achieving delayed linkage may also be adopted.

[0037] A guide structure extending along the first direction is also provided between the slide 20 and the forming slider 30 to effectively prevent the relative position deviation between the forming slider 30 and the slide 20. Specifically, in this embodiment, the guide structure includes a guide column 33 fixed on the forming slider 30 and a guide hole 22 provided on the slide 20, and the guide column 33 is matched in the guide hole 22. In this way, the guide matching between the slide 20 and the forming slider 30 is realized; the structural design is simple and easy to implement. Of course, in other embodiments, the guide structure is not limited to this.

[0038] Specifically, in this embodiment, the oblique guide matching structure of the shovel base 11 and the slide 20 is: the slide 20 is provided with a T-shaped oblique guide groove 24 on the side away from the forming slider 30, and a T-shaped block 12 is slidably mounted in the T-shaped oblique guide groove 24, and the T-shaped block 12 is fixedly connected to the shovel base 11; in this way, when the shovel base 11 moves in the vertical direction, it drives the T-shaped block 12 to move in the vertical direction together, and the movement of the T-shaped block 12 in the vertical direction drives the slide 20 to translate in the horizontal direction. Of course, in other embodiments, the shovel base 11 and the T-shaped block 12 can also be an integral connection structure.

[0039] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. An inclined hole core pulling mechanism, characterized in that: It includes a shovel base, a slide rail, a slide seat, a forming slider, an inclined hole core pulling assembly and a delayed linkage assembly; the slide seat is arranged on the slide rail to be restricted to slide back and forth in a first direction, and the shovel base and the slide seat form an inclined guide; the forming slider is connected to the slide seat through a delayed linkage assembly, so that the slide seat moves a certain displacement in the first direction and then drives the forming slider to move synchronously; the forming slider is provided with a forming part and an inclined hole penetrating the forming part, and the slide seat has an inclined support extending into the bottom of the inclined hole; the inclined hole core pulling assembly includes a forming column and a core pulling spring, the forming column is assembled in the inclined hole, and the core pulling spring applies an elastic force toward the bottom to the forming column, so that the top of the forming column is against the inclined support of the slide seat.

2. The inclined hole core pulling mechanism according to claim 1, characterized in that: A first mounting cavity with a larger aperture than the inclined hole is provided at the bottom of the forming slider, an abutment end cap is provided at the bottom of the forming column, the core-pulling spring is sleeved on the forming column and accommodated in the first mounting cavity, and the two ends of the core-pulling spring respectively abut against the top inner wall of the first mounting cavity and the abutment end cap.

3. The inclined hole core pulling mechanism according to claim 1, characterized in that: The delayed linkage assembly includes a limit screw and a support spring. The limit screw is passed through the slide seat and fixedly connected to the forming slider through the first end. The second end of the limit screw forms a limit end cap. The slide seat has a limit step corresponding to the limit end cap. When the slide seat and the forming slider are against each other, the limit end cap and the limit step are spaced apart. The support spring is arranged between the slide seat and the forming slider and applies an elastic force to the forming slider away from the slide seat.

4. The inclined hole core pulling mechanism according to claim 3, characterized in that: The supporting spring is sleeved on the limiting screw.

5. The inclined hole core pulling mechanism according to claim 4, characterized in that: The slide seat is provided with a second installation cavity on a side facing the molding slide block, and the support spring is accommodated in the second installation cavity.

6. The inclined hole core pulling mechanism according to claim 1, characterized in that: A guide structure extending along the first direction is also provided between the slide seat and the forming slide block.

7. The inclined hole core pulling mechanism according to claim 6, characterized in that: The guide structure comprises a guide column fixed on the forming slide block and a guide hole provided on the slide seat, and the guide column is matched in the guide hole.

8. The inclined hole core pulling mechanism according to claim 1, characterized in that: The slide seat is provided with a T-shaped oblique guide groove on a side away from the forming slide block, and a T-shaped block is slidably mounted in the T-shaped oblique guide groove, and the T-shaped block is fixedly connected to the shovel base.

9. An injection mold, comprising a front mold and a rear mold, characterized in that: It also includes the inclined hole core pulling mechanism as described in any one of claims 1 to 8, wherein the slide rail, slide seat and forming slider are assembled on the rear mold, the shovel base is fixed on the front mold, and the opening and closing actions of the front mold and the rear mold drive the slide seat to slide on the slide rail.

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