Oblique core-pulling mechanism for front mold of mold

Abstract

The utility model discloses an oblique core-pulling mechanism for a front mold of a mold, which comprises a forming jig, a plurality of inserts, a plurality of slide blocks and a plurality of tunnel needles, the inserts are embedded on the forming jig, the slide blocks are vertically arranged in the forming jig in a penetrating manner and are in up-down sliding fit with the forming jig, matching notches are arranged at the tops of the inserts, the slide blocks are in one-to-one correspondence with the matching notches, and the tunnel needles are arranged on the tunnel needles. A first inclined plane part is formed at the bottom of the matching notch, a forming concave position is formed at the bottom of the insert, the first inclined plane part is communicated with the forming concave position through a tunnel hole, the axis of the tunnel hole is perpendicular to the first inclined plane part, and a limiting sliding groove is formed in the lower end of the sliding block and is parallel to the first inclined plane part; the upper end of the tunnel needle is clamped in the limiting sliding groove and can slide along the limiting sliding groove, and the tunnel needle penetrates through the tunnel hole and is in sliding fit with the tunnel hole. The multi-directional synchronous core pulling mechanism can realize multi-directional synchronous core pulling, and is simple in structure and low in application cost.

Description

Technical Field

[0001] This utility model relates to injection molds, and more particularly to a front mold inclined core-pulling mechanism. Background Technology

[0002] Injection molded parts need to be shaped using molds, such as Figure 1 As shown, due to the shape of the product, the injection molded workpiece 100 usually needs to form holes 101 in different directions. In the traditional process, a slider and drive mechanism need to be set separately for each hole. Each drive mechanism drives the corresponding slider to move up and down, thereby realizing the core pulling function. However, this kind of mold relies on a large number of drive and transmission mechanisms, which not only makes it difficult to arrange the structure in a compact space, but also has high application costs and is inconvenient for motion control. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a mold front mold inclined core pulling mechanism that can achieve multi-directional synchronous core pulling, and has a simple structure and low application cost, in order to overcome the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] A mold front mold inclined core-pulling mechanism includes a forming fixture, multiple inserts, multiple sliders, and multiple tunnel pins. The inserts are all embedded in the forming fixture. The sliders are vertically inserted into the forming fixture and slide vertically with it. Each insert has a matching recess at its top, and each slider corresponds to one of the matching recesses. A first inclined surface is formed at the bottom of each matching recess, and a forming recess is formed at the bottom of each insert. The first inclined surface and the forming recess are connected by a tunnel hole, the axis of which is perpendicular to the first inclined surface. A limiting groove is formed at the lower end of each slider, parallel to the first inclined surface. The upper end of each tunnel pin is engaged in the limiting groove and can slide along it. The tunnel pin passes through the tunnel hole and slides with it. When the slider rises or falls, it causes the tunnel pin to retract or extend relative to the forming recess.

[0006] Preferably, the lower end of the slider has a second inclined surface, which is arranged parallel to the first inclined surface.

[0007] Preferably, the lower edge of the slider has multiple chamfered portions.

[0008] Preferably, the limiting groove has a "T" shaped cross section, and the upper end of the tunnel needle has an end cap, which is engaged in the limiting groove and the two slide together.

[0009] Preferably, a sliding sleeve is embedded and fixed at the top of the forming fixture, the slider corresponds to the sliding sleeve one by one, the slider passes through the sliding sleeve and the two slide up and down in cooperation.

[0010] Preferably, the top of the forming fixture is fixed with a top plate, the top plate covers the top of the sliding sleeve, and the slider passes through the top plate and the two slide in cooperation.

[0011] Preferably, the side of the top plate is fixedly connected to the side of the forming fixture by a plurality of locking blocks.

[0012] In the inclined core-pulling mechanism of the mold front mold disclosed in this utility model, the holes of the injection molded workpiece face different directions. In order to injection mold the workpiece and the holes together, this utility model fixes multiple inserts on the molding fixture, and sets multiple sliders above the multiple inserts accordingly, aligning the lower ends of the sliders with the first inclined surface of the top of the inserts. A limiting groove is provided at the lower end of the slider, and the upper end of the tunnel pin slides in cooperation with the limiting groove. Simultaneously, the tunnel pin slides through the tunnel hole. Since the axis of the tunnel hole is perpendicular to the first inclined surface, when the slider moves upward, the limiting groove applies pressure to the upper end of the tunnel pin. When tension is applied, the upper end of the tunnel pin slides relative to the limiting groove, and the main body of the tunnel pin slides inward relative to the tunnel hole, thereby completing the core-pulling movement. When the slider moves downward, based on the cooperation between the limiting groove and the tunnel pin, the main body of the tunnel pin slides out relative to the tunnel hole to complete the mold closing. Based on the above structure, multiple sliders are arranged vertically, and the mold only needs to be set with the same driving block to drive multiple sliders to move up and down synchronously, thereby driving multiple tunnel pins to pull the core synchronously. Compared with the prior art, this utility model not only realizes multi-directional synchronous core pulling, but also eliminates the need to set multiple core-pulling driving mechanisms, making the overall structure simpler and the application cost lower. Attached Figure Description

[0013] Figure 1 This is a 3D view of the injection-molded part;

[0014] Figure 2 This is a structural diagram of the injection molded part and the mold;

[0015] Figure 3 A 3D view of the inclined core-pulling mechanism of the front mold;

[0016] Figure 4 This is an exploded view of the inclined core-pulling mechanism of the front mold.

[0017] Figure 5 Structure for inserts, sliders and tunnel needles Figure 1 ;

[0018] Figure 6 Structure for inserts, sliders and tunnel needles Figure 2 ;

[0019] Figure 7 This is a cross-sectional view of the inlay. Detailed Implementation

[0020] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0021] This utility model discloses a front mold inclined core-pulling mechanism, combined with Figures 2 to 7 As shown, it includes a forming fixture 1, multiple inserts 2, multiple sliders 3, and multiple tunnel pins 4. The inserts 2 are all embedded in the forming fixture 1. The sliders 3 are vertically inserted into the forming fixture 1, and the two slide vertically together. The top of each insert 2 has a matching recess 20, and each slider 3 corresponds to one of the matching recesses 20. The bottom of each matching recess 20 has a first inclined surface 21, and the bottom of each insert 2 has a forming recess 22. A tunnel connects the first inclined surface 21 and the forming recess 22. The holes 23 are connected, and the axis of the tunnel hole 23 is perpendicular to the first inclined surface 21. The lower end of the slider 3 is provided with a limiting groove 30, which is parallel to the first inclined surface 21. The upper end of the tunnel needle 4 is engaged in the limiting groove 30, and the upper end of the tunnel needle 4 can slide along the limiting groove 30. The tunnel needle 4 passes through the tunnel hole 23 and the two slide together. When the slider 3 rises or falls, it drives the tunnel needle 4 to retract or extend relative to the forming recess 22.

[0022] In the above structure, such as Figure 1As shown, the holes 101 of the injection molded workpiece 100 face different directions. To injection mold the workpiece 100 and the holes 101 together, this utility model fixes multiple inserts 2 on the molding fixture 1, and sets multiple sliders 3 above the inserts 2 accordingly, aligning the lower ends of the sliders 3 with the first inclined surface 21 on the top of the inserts 2. A limiting groove 30 is provided at the lower end of the slider 3, and the upper end of the tunnel pin 4 slides in cooperation with the limiting groove 30. Simultaneously, the tunnel pin 4 slides in cooperation with the tunnel hole 23. Since the axis of the tunnel hole 23 is perpendicular to the first inclined surface 21, when the slider 3 moves upward, the limiting groove 30 controls the upper end of the tunnel pin 4. A pulling force is applied to the end, and at the same time, the upper end of the tunnel needle 4 slides relative to the limiting groove 30, and the main body of the tunnel needle 4 slides inward relative to the tunnel hole 23, thereby completing the core pulling movement. When the slider 3 moves downward, based on the cooperation between the limiting groove 30 and the tunnel needle 4, the main body of the tunnel needle 4 slides out relative to the tunnel hole 23 to complete the mold closing. Based on the above structure, multiple sliders 3 are all arranged vertically. The mold only needs to be set with the same driving block to drive multiple sliders 3 to move up and down synchronously, thereby driving multiple tunnel needles 4 to pull the core synchronously. Compared with the prior art, this utility model not only realizes multi-directional synchronous core pulling, but also eliminates the need to set multiple core pulling driving mechanisms. The overall structure is simpler and the application cost is lower.

[0023] To better adapt the lower end of the slider 3 to the matching notch 20 and the second inclined surface 31, in this embodiment, in combination with Figures 5 to 7 As shown, the lower end of the slider 3 has a second inclined surface 31, which is parallel to the first inclined surface 21. In practical applications, when the slider 3 descends to a certain distance, the second inclined surface 31 can come into contact with the first inclined surface 21.

[0024] As a preferred embodiment, the lower edge of the slider 3 is provided with a plurality of chamfered portions 32. In this embodiment, a plurality of chamfered portions 32 are preferably provided around the lower end of the slider 3. These chamfered portions 32 facilitate the lower end of the slider 3 to enter and exit the matching recess 20, and avoid collisions or jamming between the lower end of the slider 3 and the matching recess 20.

[0025] Regarding the preferred sliding fit between the upper end of the tunnel needle 4 and the limiting groove 30, in this embodiment, the limiting groove 30 has a "T" shaped cross-section, and the upper end of the tunnel needle 4 has an end cap that is engaged within the limiting groove 30. The end cap at the upper end of the tunnel needle 4 is an outwardly protruding structure; alternatively, an annular groove can be formed at the upper end of the tunnel needle 4, making its upper end "I" shaped.

[0026] To ensure that the slider 3 slides up and down smoothly, in this embodiment, combined with Figures 4 to 7 As shown, a sliding sleeve 5 is embedded and fixed on the top of the forming fixture 1, and the slider 3 corresponds to the sliding sleeve 5 one by one. The slider 3 passes through the sliding sleeve 5 and the two slide up and down in cooperation.

[0027] In a preferred embodiment, a top plate 6 is fixed to the top of the forming fixture 1, the top plate 6 covering the sliding sleeve 5, and the slider 3 passing through the top plate 6 with the two in sliding engagement. Furthermore, the side of the top plate 6 is fixedly connected to the side of the forming fixture 1 by multiple locking blocks 7. The top plate 6 primarily serves a reinforcing function at the top of the mold.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A mold front mold inclined core pulling mechanism characterized by, The device includes a forming fixture (1), multiple inserts (2), multiple sliders (3), and multiple tunnel pins (4). The inserts (2) are all embedded in the forming fixture (1). The sliders (3) are vertically inserted into the forming fixture (1) and slide vertically together. Each insert (2) has a matching notch (20) at its top. Each slider (3) corresponds to one of the matching notches (20). The bottom of each matching notch (20) has a first inclined surface (21), and the bottom of each insert (2) has a forming recess (22). A tunnel connects the first inclined surface (21) and the forming recess (22). The holes (23) are connected, and the axis of the tunnel hole (23) is perpendicular to the first inclined surface (21). The lower end of the slider (3) is provided with a limiting groove (30), which is parallel to the first inclined surface (21). The upper end of the tunnel needle (4) is locked in the limiting groove (30), and the upper end of the tunnel needle (4) can slide along the limiting groove (30). The tunnel needle (4) passes through the tunnel hole (23) and the two slide together. When the slider (3) rises or falls, it drives the tunnel needle (4) to retract or extend relative to the forming recess (22).

2. The inclined core-drawing mechanism of the mold front mold of claim 1, wherein, The lower end of the slider (3) has a second inclined surface (31), which is arranged parallel to the first inclined surface (21).

3. The inclined core-pulling mechanism for the front mold as described in claim 1, characterized in that, The lower edge of the slider (3) has multiple chamfered portions (32).

4. The inclined core-pulling mechanism for the front mold as described in claim 1, characterized in that, The limiting groove (30) has a "T" shaped cross section, and the upper end of the tunnel needle (4) is formed with an end cap. The end cap is locked in the limiting groove (30) and the two slide together.

5. The inclined core-pulling mechanism for the front mold as described in claim 1, characterized in that, The top of the forming fixture (1) is fitted with and fixed with a sliding sleeve (5). The slider (3) corresponds to the sliding sleeve (5) one by one. The slider (3) passes through the sliding sleeve (5) and the two slide up and down in cooperation.

6. The inclined core-drawing mechanism of the mold front mold of claim 5, wherein, The top of the forming fixture (1) is fixed with a top plate (6), which covers the top of the sliding sleeve (5). The slider (3) passes through the top plate (6) and the two slide together.

7. The inclined core-drawing mechanism of the front mold of the mold according to claim 6, wherein The side of the top plate (6) is fixedly connected to the side of the forming fixture (1) by a plurality of locking blocks (7).

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