Injection mold

Abstract

The utility model provides an injection mold. The injection mold comprises a lower mold base and an upper mold base arranged above the lower mold base, a left sliding block and a right sliding block are arranged between the upper die base and the lower die base, concave cavity faces are arranged on the opposite side faces of the left sliding block and the right sliding block, positioning protrusions are arranged on the cavity faces at intervals in the vertical direction, and a cylindrical cavity is formed between the two opposite cavity faces after the left sliding block and the right sliding block are oppositely combined. A concave cavity with a downward opening is formed in the lower portion of the upper die base, an inserting column arranged in the vertical direction is fixed in the concave cavity, when the upper die base and the lower die base are oppositely combined, the inserting column is inserted into the center of the interior of the cylindrical cavity, at the moment, the left sliding block and the right sliding block are located in the concave cavity, and a sliding groove formed in the left-right direction is formed in the position, below the cylindrical cavity, of the lower die base. And the outer port of the chute extends to the side wall of the lower die holder. The structure of the injection mold is designed, and the injection mold can adapt to the center shaft of the through hole conductive slip ring subjected to integral injection molding processing, so that the production efficiency can be effectively improved, the production quality is ensured, and the injection mold has good practicability.

Description

Technical Field

[0001] The utility model relates to the field of injection mold structure design, in particular to an injection mold for a through-hole conductive slip ring center shaft. Background Art

[0002] Through-hole conductive slip ring is a general term for a series of conductive slip rings with a hole in the center. It is a precision power transmission device that realizes the transmission of images, data signals and power between two relatively rotating mechanisms. It is particularly suitable for applications where there is unlimited continuous rotation and power or data needs to be transmitted from a fixed position to a rotating position. The structure of the through-hole conductive slider includes a tubular shell and a central axis. The center of the central axis has an axial through hole. The central axis is arranged at the axis position in the tubular shell. A conductive brush is fixed in the tubular shell. A copper ring is fixed on the outer wall of the central axis. The electrical connection between the copper ring and the conductive brush is achieved by maintaining contact between the conductive brush and the outer side of the copper ring. In the prior art, due to the lack of an injection mold that can directly injection mold the central axis, the central axis is usually produced by stacking and assembling multiple insulating layers, that is, stacking and assembling multiple insulating layers. During assembly, the copper ring is installed between adjacent insulating layers. The entire assembly process is very cumbersome and the production efficiency is low. Utility Model Content

[0003] In this regard, the utility model provides an injection mold suitable for injection molding of a through-hole slip ring center shaft, which can realize integrated injection molding of the center shaft, thereby improving production efficiency.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an injection mold, comprising a lower mold base and an upper mold base arranged above the lower mold base, wherein the upper mold base can move up and down relative to the lower mold base;

[0006] A left slider and a right slider are arranged between the upper die base and the lower die base, and opposite sides of the left slider and the right slider are provided with concave cavity surfaces, and positioning protrusions for positioning copper rings are arranged at intervals in the up-down direction on each cavity surface, and a cylindrical cavity is formed between the two opposite cavity surfaces after the left slider and the right slider are matched;

[0007] A concave cavity opening downward is provided at the lower part of the upper mold base, and a plug column arranged along the up and down directions is fixed in the concave cavity. When the upper mold base is matched with the lower mold base, the plug column is inserted into the center of the cylindrical cavity. At this time, the left slider and the right slider are in the concave cavity, and the lower mold base is provided with a slide groove arranged along the left and right directions below the cylindrical cavity, and the outer port of the slide groove extends to the side wall of the lower mold base.

[0008] In some embodiments, a socket is provided on the lower mold base at a position opposite to the plug column, the socket is communicated with the inner end of the slide groove, and the lower end of the plug column is inserted into the socket when the upper mold base and the lower mold base are matched.

[0009] In some embodiments, the lower end of the plug post is a tapered structure.

[0010] In some embodiments, the positioning protrusion is semi-annular.

[0011] In some embodiments, a left inclined surface and a right inclined surface are respectively provided on the upper left side of the left slider and the upper right side of the right slider, and the left inclined surface and the right inclined surface are arranged in an eight-shape, and two opposite inclined pressure surfaces are provided in the concave cavity, and the two inclined pressure surfaces are suitable for respectively pressing and limiting the left inclined surface and the right inclined surface.

[0012] In some embodiments, plug blocks are provided on both sides of the bottom of the left slider and the right slider, and a downwardly recessed groove is provided on the upper surface of the lower mold base. Slots that are movably connected to the plug blocks are provided on the side walls on opposite sides of the groove. The slots extend along the left and right directions and have notches provided on the side walls of the lower mold base, and the plug blocks are suitable for being inserted into the slots through the notches.

[0013] The utility model has the positive effects that the injection mold structure design in the utility model is reasonable, and can realize the one-piece injection molding of the through-hole slip ring center shaft, thereby improving production efficiency, and the produced center shaft structure has good integrity, reducing the error problem caused by assembly, thereby ensuring production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the central shaft of the through-hole slip ring in the utility model;

[0016] Figure 2 It is a structural schematic diagram of the injection mold in the utility model;

[0017] Figure 3 for Figure 2 A top view of the injection mold;

[0018] Figure 4 For along Figure 3 Sectional view cut along line AA;

[0019] Figure 5It is a schematic diagram of the structure of the lower die base and the left and right sliders in the utility model when they are matched;

[0020] Figure 6 This is a schematic diagram of the structure of the upper die seat in the utility model;

[0021] Figure 7 It is an exploded view of the injection mold in the utility model;

[0022] Figure 8 It is a structural schematic diagram of the left slider / right slider in the utility model.

[0023] The reference numerals shown in the figure are: 1-lower die base; 11-slide groove; 12-insert hole; 13-groove; 14-slot; 2-upper die base; 21-concave cavity; 22-insert column; 23-inclined pressing surface; 3-left slider; 31-left inclined surface; 4-right slider; 41-right inclined surface; 5-cavity surface; 51-positioning protrusion; 6-insert block; 7-copper ring; 8-wire; 9-shaft body. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] The injection mold in this embodiment is used for injection molding of the central shaft of the through-hole conductive slip ring. Specifically, the shaft body 9 (plastic material), the copper ring 7 and the wire 8 connected to the copper ring 7 are injection molded into one body. The structure is as follows: Figure 1 shown.

[0028] like Figures 2 to 8 As shown, the injection mold comprises a lower mold base 1 and an upper mold base 2 arranged above the lower mold base 1, and the upper mold base 2 can move up and down relative to the lower mold base 1; a left slider 3 and a right slider 4 are arranged between the upper mold base 2 and the lower mold base 1, and a concave cavity surface 5 is arranged on the opposite side of the left slider 3 and the right slider 4, and a positioning protrusion 51 for positioning the copper ring 7 is arranged at intervals along the up and down directions on each of the cavity surfaces 5, and a cylindrical cavity is formed between the two opposite cavity surfaces 5 after the left slider 3 and the right slider 4 are matched; a concave cavity 21 with an opening downward is provided at the lower part of the upper mold base 2, and a positioning protrusion 51 along the up and down directions is fixed in the concave cavity 21 The plug 22 is arranged in the lower direction. When the upper mold base 2 and the lower mold base 1 are matched, the plug 22 is inserted into the center of the cylindrical cavity. At this time, the left slider 3 and the right slider 4 are in the concave cavity 21, that is, the concave cavity 21 can limit the left slider 3 and the right slider 4, so that the left slider 3 and the right slider 4 can be kept in a matched state during injection molding. The lower mold base 1 is provided with a slide groove 11 arranged along the left and right directions below the cylindrical cavity. The outer port of the slide groove 11 extends to the side wall of the lower mold base 1. The existence of the slide groove 11 is used for the wire 8 connected to the copper ring 7 to pass through when the left slider 3 and the right slider 4 are installed. In order to facilitate mold manufacturing, the structures of the left slider 3 and the right slider 4 in this embodiment are exactly the same.

[0029] When the injection mold in this embodiment is used for injection molding, the copper ring 7 is first connected to the wire 8 (such as welding), and then the copper ring 7 is installed in the cylindrical cavity and positioned by the positioning protrusion 51 (the outer periphery of the copper ring 7 has an annular groove surface, and the copper ring 7 can be positioned by the cooperation of the annular groove surface and the positioning protrusion 51). Then, the left slider 3 and the right slider 5 are mounted on the lower mold base 1, and then the upper mold base 2 is moved downward to align with the lower mold base 1, and the plug 22 is inserted into the cylindrical cavity and then the inner wall of the cylindrical cavity and the outer wall of the plug 22 are aligned. The gap between the two is filled with plastic, the outer peripheral surface of the plug 22 forms the inner wall surface of the central axis, and the cavity surface 4 forms the outer wall surface of the central axis. After the injection molding is completed, the upper mold base 2 moves upward and separates from the lower mold base 1, and the plug 22 is pulled out of the cylindrical cavity. The left slider 3 and the right slider 4 are removed from the lower mold base 1 together. Finally, the left slider 3 is separated from the right slider 4 and the injection molded central axis is taken out. The injection mold can adapt to the one-piece injection molding of the central axis of the through-hole conductive slip ring, which can improve production efficiency, and the production quality is guaranteed, and it has good practicality.

[0030] like Figure 4As shown, a plug hole 12 is provided on the lower mold base 1 at a position relative to the plug column 22, and the plug hole 12 is connected to the inner end of the slide groove 11. When the upper mold base 2 and the lower mold base 1 are matched, the lower end of the plug column 22 is inserted into the plug hole 12, thereby effectively positioning the plug column 22 to ensure its position accuracy, thereby ensuring the injection molding quality of the product.

[0031] like Figure 4 As shown, the lower end of the plug post 22 is a conical structure, and the plug post 22 can play a guiding role through the conical structure when it is inserted into the cylindrical cavity and the plug hole 12.

[0032] In order to better position the copper ring 7, Figure 8 As shown, each positioning protrusion 51 is set to be semi-ring-shaped. When the left slider 3 and the right slider 4 are aligned, the two relatively arranged positioning protrusions 51 form a complete ring, so that the copper ring 7 can be more accurately positioned. The surface shape of the positioning protrusion 51 matches the shape of the annular groove surface on the copper ring 7, so that the copper ring 7 can be positioned more accurately.

[0033] like Figure 4 As shown, a left bevel 31 and a right bevel 41 are respectively provided on the upper left side of the left slider 3 and the upper right side of the right slider 4, and the left bevel 31 and the right bevel 41 are arranged in an eight-shaped shape. Two opposing inclined pressure surfaces 23 are provided in the concave cavity 21, and the two inclined pressure surfaces 23 are suitable for respectively pressing and limiting the left bevel 31 and the right bevel 41. With such an arrangement, when the upper mold base 2 moves downward and mates with the lower mold base 1, pressure can be generated on the left bevel 31 and the right bevel 41 through the inclined pressure surfaces 23, thereby ensuring that the left slider 3 and the right slider 4 remain closely matched during injection molding, thereby ensuring the injection molding production accuracy, that is, ensuring the production quality of the central axis.

[0034] like Figure 5 and Figure 7 As shown, in order to ensure the position accuracy of the left slider 3 and the right slider 4, the left slider 3 and the right slider 4 are provided with plug blocks 6 on both sides of the bottom, the upper surface of the lower mold base 1 is provided with a downwardly recessed groove 13, and the groove 13 is provided with a slot 14 movably plugged with the plug block 6 on the opposite side walls, and the cooperation between the slot 14 and the plug block 6 can guide and limit the movement of the left slider 3 and the right slider 4. The slot 14 is extended in the left and right directions and has a notch provided on the side wall of the lower mold base 1, and the plug block 6 is suitable for being inserted into the slot 14 through the notch; during assembly, the copper ring 7 is first installed in the cylindrical cavity between the left slider 3 and the right slider 4 and the copper ring 7 is effectively positioned by the positioning protrusion 51, and then the left slider 3 and the right slider 4 are kept in a mating state so that the plug block 6 is inserted into the slot 14 through the notch, and then the left slider 3 and the right slider 4 are pushed into place under the guidance of the slot 14.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An injection mold, comprising a lower mold base (1) and an upper mold base (2) arranged above the lower mold base (1), wherein the upper mold base (2) can move up and down relative to the lower mold base (1); characterized in that: A left slider (3) and a right slider (4) are arranged between the upper die seat (2) and the lower die seat (1), and opposite to each other on the left and right sides of the left slider (3) and the right slider (4). Concave cavity surfaces (5) are arranged on the opposite sides of the left slider (3) and the right slider (4), and positioning protrusions (51) for positioning the copper ring (7) are arranged at intervals in the up-down direction on each cavity surface (5). When the left slider (3) and the right slider (4) are matched, a cylindrical cavity is formed between the two opposite cavity surfaces (5). The lower part of the upper mold base (2) is provided with a concave cavity (21) opening downward, and a plug column (22) arranged in the up-down direction is fixed in the concave cavity (21). When the upper mold base (2) and the lower mold base (1) are matched, the plug column (22) is inserted into the center of the cylindrical cavity. At this time, the left slider (3) and the right slider (4) are in the concave cavity (21), and the lower mold base (1) is provided with a slide groove (11) arranged in the left-right direction below the cylindrical cavity, and the outer end of the slide groove (11) extends to the side wall of the lower mold base (1).

2. The injection mold according to claim 1, characterized in that: The lower die base (1) is provided with an insertion hole (12) at a position opposite to the insertion column (22); the insertion hole (12) is communicated with the inner end of the slide groove (11); and when the upper die base (2) and the lower die base (1) are matched, the lower end of the insertion column (22) is inserted into the insertion hole (12).

3. The injection mold according to claim 1, characterized in that: The lower end of the plug post (22) is a conical structure.

4. The injection mold according to claim 1, characterized in that: The positioning protrusion (51) is semi-annular.

5. The injection mold according to claim 1, characterized in that: A left inclined surface (31) and a right inclined surface (41) are respectively arranged on the upper left side of the left slider (3) and the upper right side of the right slider (4), and the left inclined surface (31) and the right inclined surface (41) are arranged in an eight-shaped shape. Two opposite inclined pressure surfaces (23) are arranged in the concave cavity (21), and the two inclined pressure surfaces (23) are suitable for respectively pressing and limiting the left inclined surface (31) and the right inclined surface (41).

6. The injection mold according to claim 1, characterized in that: Insert blocks (6) are provided on both sides of the bottom of the left slider (3) and the right slider (4); a groove (13) recessed downward is provided on the upper surface of the lower die base (1); and slots (14) movably connected to the insert blocks (6) are provided on the side walls opposite to the groove (13); the slots (14) extend in the left-right direction and have notches provided on the side walls of the lower die base (1); and the insert blocks (6) are suitable for being inserted into the slots (14) through the notches.

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