Forming tool for eliminating closed angle of molded part

Abstract

The utility model discloses a forming tool for eliminating a closed angle of a molded part, which belongs to the technical field of molded part processing and comprises an upper die body, a lower die body is arranged on the lower surface of the upper die body, a molded part cavity is arranged inside the lower die body, rectangular transverse holes are arranged on the front side and the rear side of the bottom of the lower die body, and the rectangular transverse holes are communicated with the molded part cavity. And a slidable arc-shaped movable block is arranged in the rectangular transverse hole. According to the forming tool for eliminating the closed angle of the molded part, through the design that the elastic extrusion device is arranged, continuous and stable extrusion force can be applied to the arc-shaped movable block in the mold pressing process, and when mold pressing starts, a connecting spring column and an extrusion spring in the elastic extrusion device can automatically adjust the extrusion force on the arc-shaped movable block according to the change of mold pressing pressure; the arc-shaped movable block can move towards the closed angle area of the molded part, material vacancy at the closed angle is filled, the problem of sink marks or material shortage is effectively avoided, and the filling effect of materials in the closed angle area is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of molding part processing technology, specifically a forming tooling for eliminating closed angles in molding parts. Background Technology

[0002] In the production of molded parts, the presence of closed angles is a common and challenging problem. Closed angles refer to the internal angles formed by two adjacent surfaces on a molded part. Due to limitations in mold structure and molding process, these closed angles are prone to defects such as stress concentration, uneven material accumulation, and incomplete molding, which seriously affect the quality and performance of the molded parts. Currently, existing molded parts are generally filled in the closed angle area by increasing pressure during the production process. However, relying solely on increasing pressure during the production process of existing molded parts is insufficient to ensure sufficient material filling in the closed angle area, and it is still very easy to cause shrinkage marks or material shortages, resulting in poor processing quality of the molded parts and hindering more efficient processing operations. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a forming tooling for eliminating the closed corner of the molded part. It solves the problem that in the production process, it is difficult to ensure that the material in the closed corner area is fully filled by simply increasing the pressure, which still easily leads to shrinkage marks or material shortage, resulting in poor processing quality of the molded part and hindering more efficient processing of the molded part.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a forming fixture for eliminating closed angles in molded parts, comprising an upper mold body, a lower mold body disposed on the lower surface of the upper mold body, a molded part cavity disposed inside the lower mold body, rectangular transverse holes being provided on both the front and rear sides of the bottom of the lower mold body, a slidable arc-shaped movable block disposed inside the rectangular transverse hole, a bent tube slider being fixedly installed on the outer side of the arc-shaped movable block, and an elastic extrusion device being fixedly installed inside the rectangular transverse hole.

[0007] As a further embodiment of this utility model: the elastic compression device includes a fixed vertical plate fixedly installed on the inner wall of a rectangular horizontal hole, a slidable U-shaped sliding plate provided inside the fixed vertical plate, a connecting spring column fixedly installed on the inner wall of the U-shaped sliding plate and connected to the outer side of the fixed vertical plate, an extension horizontal plate fixedly installed on the outer side of the U-shaped sliding plate, a slidable sliding bracket provided on the inner side of the extension horizontal plate, a compression spring fixedly installed on the inner side of the sliding bracket and connected to the extension horizontal plate, a rotatable compression rod provided on the inner side of the sliding bracket, a rotatable connecting bracket provided on the inner side of the compression rod, and a connecting horizontal plate fixedly installed on the inner side of the connecting bracket and connected to the outer side of the arc-shaped movable block.

[0008] As a further embodiment of this utility model: a sliding block is fixedly installed on the outer side of the sliding bracket, and a sliding groove is provided on the inner side of the extended horizontal plate, with the sliding block and the sliding groove being slidably connected.

[0009] As a further embodiment of this utility model: the inner wall of the rectangular horizontal hole is provided with an elongated groove, and the bent tube slider slides along the inner wall of the elongated groove.

[0010] As a further embodiment of this utility model: a sliding cavity is provided inside the fixed vertical plate, and the size of the sliding cavity is adapted to the size of the U-shaped sliding plate.

[0011] As a further aspect of this utility model: the number of extrusion rods is two sets, and the length of both sets of extrusion rods is fifty millimeters.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This forming fixture for eliminating closed corners in molded parts, through the design of an elastic extrusion device, can apply continuous and stable extrusion force to the arc-shaped movable block during the molding process. When molding begins, the connecting spring column and extrusion spring in the elastic extrusion device will automatically adjust the extrusion force on the arc-shaped movable block according to the change of molding pressure, so that the arc-shaped movable block can move towards the closed corner area of ​​the molded part, fill the material gap at the closed corner, effectively avoid shrinkage marks or material shortage problems, and greatly improve the filling effect of material in the closed corner area. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the vertical cross-section of the present invention;

[0017] Figure 3 This is a schematic diagram of the elastic extrusion device of this utility model;

[0018] In the diagram: 1. Upper mold body; 2. Lower mold body; 3. Molded part cavity; 4. Rectangular horizontal hole; 5. Arc-shaped movable block; 6. Bent tube slider; 7. Elastic extrusion device; 701. Fixed vertical plate; 702. U-shaped sliding plate; 703. Connecting spring column; 704. Extending horizontal plate; 705. Sliding bracket; 706. Extrusion spring; 707. Extrusion rod; 708. Connecting bracket; 709. Connecting horizontal plate. Detailed Implementation

[0019] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0020] like Figure 1-3 As shown, this utility model provides a technical solution: a forming tooling for eliminating the closed angle of a molded part, including an upper mold body 1, a lower mold body 2 provided on the lower surface of the upper mold body 1, a molded part cavity 3 provided inside the lower mold body 2, the molded part cavity 3 being used to accommodate and shape the molded part, rectangular horizontal holes 4 being provided on both the front and rear sides of the bottom of the lower mold body 2, a sliding arc-shaped movable block 5 being provided inside the rectangular horizontal hole 4, a bent tube slider 6 being fixedly installed on the outer side of the arc-shaped movable block 5, and an elastic extrusion device 7 being fixedly installed inside the rectangular horizontal hole 4.

[0021] The elastic compression device 7 includes a fixed vertical plate 701 fixedly installed on the inner wall of the rectangular horizontal hole 4. Inside the fixed vertical plate 701 is a slidable U-shaped sliding plate 702. A connecting spring post 703, connected to the outer side of the fixed vertical plate 701, is fixedly installed on the inner wall of the U-shaped sliding plate 702. The connecting spring post 703 provides cushioning and elastic support. An extension horizontal plate 704 is fixedly installed on the outer side of the U-shaped sliding plate 702. A slidable sliding bracket 705 is provided on the inner side of the extension horizontal plate 704. A compression spring 706, connected to the extension horizontal plate 704, is fixedly installed on the inner side of the sliding bracket 705. The compression spring 706 provides additional compression force. A rotatable compression rod 707 is provided on the inner side of the sliding bracket 705. A rotatable connecting bracket 708 is provided on the inner side of the compression rod 707. A connecting horizontal plate 709, connected to the outer side of the arc-shaped movable block 5, is fixedly installed on the inner side of the connecting bracket 708.

[0022] Specifically, such as Figure 1 and Figure 2 As shown, the inner wall of the rectangular horizontal hole 4 is provided with a long strip groove. The bent tube slider 6 slides along the inner wall of the long strip groove to ensure the stability of the sliding path of the bent tube slider 6, thereby ensuring the motion stability of the arc-shaped movable block 5. A sliding block is fixedly installed on the outer side of the sliding bracket 705, and a sliding groove is provided on the inner side of the extension horizontal plate 704. The sliding block is slidably connected to the sliding groove. This structural design enables the sliding bracket 705 to slide stably on the extension horizontal plate 704.

[0023] Specifically, such as Figure 3 As shown, there are two sets of extrusion rods 707, and the length of each set of extrusion rods 707 is fifty millimeters. This design can ensure sufficient force. The interior of the fixed vertical plate 701 has a sliding cavity. The size of the sliding cavity is adapted to the size of the U-shaped sliding plate 702, so that the U-shaped sliding plate 702 slides more smoothly in the fixed vertical plate 701.

[0024] The working principle of this utility model is as follows:

[0025] S1. First, place the molding material to be processed into the molding cavity 3 of the lower mold body 2, ensuring that the material is placed evenly and in the right position. At this time, the arc-shaped movable block 5 is in the initial position under the action of the elastic extrusion device 7. The connecting spring column 703 and the extrusion spring 706 in the elastic extrusion device 7 are in the normal elastic state, preparing for the subsequent extrusion action.

[0026] S2. Start the molding equipment. The upper mold 1 begins to move downward, gradually applying pressure to the molding material in the lower mold 2. As the pressure increases, the elastic extrusion device 7 starts to work. The fixed vertical plate 701 is affected by the pressure. The U-shaped sliding plate 702 begins to slide inward under the action of the connecting spring column 703, and drives the extension horizontal plate 704 to move together. The movement of the extension horizontal plate 704 causes the sliding bracket 705 to slide in the sliding groove inside. The extrusion spring 706 is compressed, further enhancing the extrusion force. The sliding bracket 705 pushes the extrusion rod 707 to rotate. The extrusion rod 707 pushes the arc-shaped movable block 5 along the long strip groove in the rectangular horizontal hole 4 to the closed corner area of ​​the molded part through the connecting bracket 708 and the connecting horizontal plate 709. The bent tube slider 6 plays a stabilizing and guiding role in the movement of the arc-shaped movable block 5, ensuring that the arc-shaped movable block 5 accurately fills the closed corner area with material.

[0027] S3. After molding is completed, the upper mold body 1 moves upward to demold. At this time, the connecting spring column 703 and the extrusion spring 706 in the elastic extrusion device 7 restore their elastic deformation, driving the arc-shaped movable block 5 back to the initial position. The molded part is then removed. At this time, it can be seen that the material in the closed corner area is fully filled, with no shrinkage marks or missing material, and the quality of the molded part is good.

[0028] In summary, this forming fixture for eliminating closed corners in molded parts, through the design of the elastic extrusion device 7, can apply a continuous and stable extrusion force to the arc-shaped movable block 5 during the molding process. When molding begins, the connecting spring column 703 and the extrusion spring 706 in the elastic extrusion device 7 will automatically adjust the extrusion force on the arc-shaped movable block 5 according to the change in molding pressure, so that the arc-shaped movable block 5 can move towards the closed corner area of ​​the molded part, fill the material gap at the closed corner, effectively avoid shrinkage marks or material shortage problems, and greatly improve the filling effect of the material in the closed corner area.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A forming fixture for eliminating closed angles in molded parts, comprising an upper mold body (1), a lower mold body (2) disposed on the lower surface of the upper mold body (1), a molded part cavity (3) disposed inside the lower mold body (2), and rectangular transverse holes (4) provided on both the front and rear sides of the bottom of the lower mold body (2), characterized in that: The rectangular horizontal hole (4) is provided with a sliding arc-shaped movable block (5), and a bent tube slider (6) is fixedly installed on the outer side of the arc-shaped movable block (5). An elastic extrusion device (7) is fixedly installed inside the rectangular horizontal hole (4).

2. The forming tooling for eliminating the closed angle of a molded part according to claim 1, characterized in that: The elastic compression device (7) includes a fixed vertical plate (701) fixedly installed on the inner wall of the rectangular horizontal hole (4). The fixed vertical plate (701) is provided with a slidable U-shaped sliding plate (702). The inner wall of the U-shaped sliding plate (702) is fixedly installed with a connecting spring column (703) connected to the outer side of the fixed vertical plate (701). The outer side of the U-shaped sliding plate (702) is fixedly installed with an extension horizontal plate (704). The inner side of the extension horizontal plate (704) is provided with a slidable sliding bracket (705). The inner side of the sliding bracket (705) is fixedly installed with a compression spring (706) connected to the extension horizontal plate (704). The inner side of the sliding bracket (705) is provided with a rotatable compression rod (707). The inner side of the compression rod (707) is provided with a rotatable connecting bracket (708). The inner side of the connecting bracket (708) is fixedly installed with a connecting horizontal plate (709) connected to the outer side of the arc-shaped movable block (5).

3. A forming tooling for eliminating closed angles in molded parts according to claim 2, characterized in that: A sliding block is fixedly installed on the outer side of the sliding bracket (705), and a sliding groove is provided on the inner side of the extension plate (704), with the sliding block and the sliding groove being slidably connected.

4. A forming tooling for eliminating closed angles in molded parts according to claim 1, characterized in that: The inner wall of the rectangular horizontal hole (4) is provided with a long strip groove, and the bent tube slider (6) slides along the inner wall of the long strip groove.

5. A forming tooling for eliminating closed angles in molded parts according to claim 2, characterized in that: The fixed vertical plate (701) has a sliding cavity inside, and the size of the sliding cavity is adapted to the size of the U-shaped sliding plate (702).

6. A forming tooling for eliminating closed angles in molded parts according to claim 2, characterized in that: The number of the extrusion rods (707) is two sets, and the length of both sets of extrusion rods (707) is fifty millimeters.

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