Automatic cutting mechanism for in-mold gate of injection mold

Abstract

An automatic cutting mechanism for an in-mold gate of an injection mold comprises a cavity template and a core template, a cavity compound plate is arranged on the cavity template, a cavity insert is arranged in the cavity template, a core insert is arranged in the core template, a mold cavity and a side gate are arranged between the core insert and the cavity insert, a product is formed in the mold cavity, and a material handle is formed in the side gate. A mold foot, an upper ejection plate and a lower ejection plate are arranged below the mold core template, an ejection rod is connected to the upper ejection plate, a cutting ejection plate is arranged on the mold foot close to the bottom surface of the mold core template, a cutting ejection rod is arranged on the cutting ejection plate, a cutter is arranged on the cutting ejection rod, a glue port insert is arranged in the mold core insert, and a part of a side glue port is arranged on the glue port insert. The cutter penetrates through the core template and the gate insert to be matched with the side gate, a clearance notch is formed in the cavity insert corresponding to the cutter, the cutting top plate is driven by power to eject upwards, the upper top plate is connected with a material handle ejector pin, and the material handle ejector pin penetrates through the core insert to be in contact with a material handle.

Description

Technical Field

[0001] The utility model relates to an automatic cutting mechanism for a glue port in an injection mold, belonging to the field of injection molds. Background Art

[0002] Plastic products produced using injection molds, such as various automotive interiors and computer components, require high surface finish based on product structure and appearance. Therefore, when designing and processing the mold, a side-injection structure is often used, where the injection port is located on one side of the mold cavity. After the product is formed, the side injection port forms a handle. Traditionally, the handle is ejected from the mold along with the product, and then manually or mechanically sheared off the handle or the product. This has the following disadvantages: 1. Increased labor costs and low manual shearing efficiency; 2. By this time, the product has completely cooled, leaving a white cross-section on the product after shearing. This requires polishing and painting, which is labor-intensive and time-consuming, increasing production costs. Summary of the Invention

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide an automatic cutting mechanism for the glue outlet in the injection mold, which can automatically cut off the glue outlet (material handle) when it is not completely cooled, and the cross section recovers by itself without additional treatment, thereby improving production efficiency and reducing production costs.

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

[0005] The automatic cutting mechanism of the glue port in the injection mold includes a cavity template and a core template, a cavity duplicate plate is set on the cavity template, a cavity insert is set in the cavity template, a core insert is set in the core template, a mold cavity and a side glue port are set between the core insert and the cavity insert, the product is formed in the mold cavity, and the material handle is formed in the side glue port, a mold foot is set under the core template, a core duplicate plate is set under the mold foot, an upper top plate and a lower top plate are set between the mold feet, a push rod is connected to the upper top plate, and the push rod passes through the core template and the core insert and the product The products are in contact with each other, a cutting top plate is provided on the mold foot near the bottom surface of the core template, a cutting top rod is provided on the cutting top plate, a cutter is provided on the cutting top rod, a glue port insert is provided in the core insert, a part of the side glue port is provided on the glue port insert, the cutter passes through the core template and the glue port insert and cooperates with the side glue port, an air avoidance incision is provided on the cavity insert corresponding to the cutter, the cutting top plate is driven up by power, a material handle ejector is connected on the upper ejector plate, and the material handle ejector passes through the core insert and contacts with the material handle.

[0006] Furthermore, a guide limit pin is provided on the cutting top plate, and a corresponding guide limit groove is provided on the bottom surface of the core template, and the guide limit pin cooperates with the guide limit groove.

[0007] Furthermore, the power for driving the cutting top plate is an oil cylinder, which is arranged on the core double plate, and the oil cylinder rod of the oil cylinder is connected to the cutting top plate.

[0008] Compared with the traditional technology, the utility model has the following beneficial effects:

[0009] 1. Automatically cut off the glue mouth (material handle), eliminating the need for manual cutting and saving labor costs;

[0010] 2. After the product is formed, the mold is not opened first. The material handle in the side glue mouth is cut off by a cutter. Since an air-avoiding cut is set on the cavity insert, the cut section is neat and smooth. At this time, the product has not yet completely cooled and solidified. The cross section on the product can heal automatically, making the cross section consistent with the product color difference. No post-processing is required, reducing production costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the injection mold of the utility model;

[0012] Figure 2 This is a schematic diagram of the automatic cutting mechanism for the in-mold glue port of the utility model;

[0013] Figure 3 It is a three-dimensional schematic diagram of the injection mold of the utility model. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but will not limit the present invention in any form. Example 1

[0015] like Figure 1 — Figure 3As shown, the present invention relates to an automatic cutting mechanism for the glue port in the injection mold, comprising a cavity template 1 and a core template 2, a cavity doubler plate 3 is arranged on the cavity template, a cavity insert 4 is arranged in the cavity template, a core insert 5 is arranged in the core template, a mold cavity 6 and a side glue port 7 are arranged between the core insert 5 and the cavity insert 4, a product 8 is formed in the mold cavity 6, a material handle 9 is formed in the side glue port 7, a mold foot 10 is arranged under the core template 2, a core doubler plate 11 is arranged under the mold foot, an upper top plate 12 and a lower top plate 13 are arranged between the mold feet, a push rod 14 is connected to the upper top plate, and the push rod 14 passes through the core template 2 and the core insert 5 and contacts the product 8. A cutting top plate 15 is provided on the mold foot 10 near the bottom surface of the core template 2 (a corresponding air avoidance is provided at the mold foot), a cutting top rod 16 is provided on the cutting top plate 15, and a cutter 17 is provided on the cutting top rod. A glue port insert 18 is provided in the core insert 5, and a part of the side glue port 7 is provided on the glue port insert 18. The cutter 17 passes through the core template 2 and the glue port insert 18 and cooperates with the side glue port 7. An air avoidance incision 19 is provided on the cavity insert 4 corresponding to the cutter 17. The cutting top plate 15 is driven to be pushed up by power, and a material handle ejector pin 23 is connected to the upper top plate 12. The material handle ejector pin 23 passes through the core insert 5 and contacts the material handle 9.

[0016] During injection molding in this embodiment, the product 8 is formed in the mold cavity 6 and the material handle 9 is formed in the side glue port 7. During demolding, the mold is not opened first. The cutting top plate 15 is first driven upward by the power, and the cutting top plate 15 drives the cutter 17 to shear the material handle 9 through the cutting top rod 16, cutting the material handle 9 from the product 8. Then the mold is opened. During the mold opening process, the product 8 and the material handle 9 are respectively pushed out of the mold by the ejector rod 14 and the material handle ejector pin 23, and the demolding is completed.

[0017] In order to smoothly cut the material handle 9, an air-avoiding cutout 19 is provided on the cavity insert 4.

[0018] In order to ensure shearing accuracy, a glue port insert 18 is provided in the core insert 5. The glue port insert can be further hardened to reduce wear and tear. Even if it is worn, it is easy to replace.

[0019] This solution achieves in-mold cutting of the product and the material handle (glue mouth). At this time, the product has not yet completely cooled and solidified, and the cross-section on the product can automatically heal, making the cross-section consistent with the product color difference, and the cross-section neat and smooth. No post-processing is required, which effectively reduces production costs and improves production efficiency, and has very beneficial positive effects.

[0020] Furthermore, a guide limit pin 20 is provided on the cutting top plate 15, and a corresponding guide limit groove 21 is provided on the bottom surface of the core template 2. The guide limit pin 20 cooperates with the guide limit groove 21 to guide and limit the cutter top plate, thereby preventing the cutting top plate from being excessively pushed up and colliding.

[0021] Furthermore, the power for driving the cutting top plate 15 is the oil cylinder 22, which is arranged on the core plate 11. The cylinder rod of the oil cylinder 22 is connected to the cutting top plate 15. When working, the oil cylinder 22 drives the cutting top plate 15 to push up, thereby driving the cutter to cut the material handle. There are usually two oil cylinders to balance the upper push.

[0022] The above specific implementation methods are used to illustrate the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. An automatic glue port cutting mechanism for an injection mold, comprising a cavity template (1) and a core template (2), a cavity duplexer (3) being provided on the cavity template, a cavity insert (4) being provided in the cavity template, a core insert (5) being provided in the core template, a mold cavity (6) and a side glue port (7) being provided between the core insert (5) and the cavity insert (4), a product (8) being formed in the mold cavity (6), a material handle (9) being formed in the side glue port (7), a mold foot (10) being provided under the core template (2), a core duplexer (11) being provided under the mold foot, an upper top plate (12) and a lower top plate (13) being provided between the mold feet, a push rod (14) being connected to the upper top plate, the push rod (14) passing through the core template (2) and the core insert (5) and contacting the product (8), characterized in that: A cutting top plate (15) is provided on the die foot (10) near the bottom surface of the core template (2), a cutting top rod (16) is provided on the cutting top plate (15), a cutter (17) is provided on the cutting top rod, a glue port insert (18) is provided in the core insert (5), a side glue port (7) is provided on the glue port insert (18), the cutter (17) passes through the core template (2) and the glue port insert (18) and cooperates with the side glue port (7), an air avoidance cut (19) is provided on the cavity insert (4) corresponding to the cutter (17), the cutting top plate (15) is driven to push up by power, a material handle ejector pin (23) is connected to the upper ejector plate (12), and the material handle ejector pin (23) passes through the core insert (5) and contacts the material handle (9).

2. The automatic cutting mechanism for the in-mold glue port of the injection mold according to claim 1, characterized in that A guide limit pin (20) is provided on the cutting top plate (15), and a corresponding guide limit groove (21) is provided on the bottom surface of the core template (2), wherein the guide limit pin (20) matches the guide limit groove (21).

3. The automatic cutting mechanism for the in-mold glue port of the injection mold according to claim 1, characterized in that The power for driving the cutting top plate (15) is an oil cylinder (22), which is arranged on the core duplex plate (11), and a cylinder rod of the oil cylinder (22) is connected to the cutting top plate (15).

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