An automatic opening and closing die structure for solving the shrinkage of the high-gloss B-pillar buckle

Abstract

The present invention belongs to the field of mold technology and provides an automatic opening and closing mold structure that solves the problem of shrinkage of the high-gloss B-pillar buckle. The structure is arranged at a straight ejector block, the lower end of which is connected to a ejector rod, a return spring is sleeved on the ejector rod, the lower end of the ejector rod is connected to an ejector pin plate, a mechanical spring block is provided at the straight ejector block, the injection molded product is located on the mechanical spring block, the straight ejector block has a spring hole and a pin hole, a pin is installed in the pin hole, the straight ejector block is connected to the mechanical spring block via the pin, the spring hole is located between the straight ejector block and the mechanical spring block, a mechanical spring is installed in the spring hole. The advantage of the present invention is that it increases the pulling force of the movable mold of the injection mold with an automatic opening and closing structure on the product, offsets the adsorption force of the fixed mold on the product, the corresponding product A surface at the product buckle structure is free of defects, the quality meets customer requirements, the qualified rate is greatly improved, and the production stability is greatly improved. This patent is a mechanical structure with high repeatability and stability, which can save the company 200,000 yuan per year.

Description

Technical Field

[0001] The present invention belongs to the technical field of molds and relates to an automatic opening and closing mold structure for solving the problem of shrinkage of high-gloss B-pillar buckles. Background Art

[0002] With the rapid development of the automotive industry and increasingly stringent environmental protection requirements, front / rear B-pillars made of high-gloss spray-free PMMA materials are increasingly being used by domestic and foreign OEMs. However, when the cavity high-gloss mirror polishing reaches 13000# and the roughness Ra≤0.003, the adsorption force on the product is relatively large. At the same time, due to product structural limitations (the extended bone position of the movable mold is only 1.5mm and cannot adhere to the movable mold) and quality requirements, the product cannot overcome the molding defects at the buckle caused by the vacuum adsorption force of the high-gloss mirror during the injection molding process, resulting in unnecessary losses. Now, parts suppliers are improving quality defects in the following ways: 1. Based on customer product data, 1. By reducing the demoulding angle of the fixed mold to create process data, the adsorption force caused by the highlight of the fixed mold can be reduced - the main problem: there is a risk of being discovered by customers if the data is modified privately, which leads to the risk of complaints, and the problem cannot be completely solved; 2. By adding textures to the movable mold or reducing the demoulding angle of the movable mold to increase the tensile force of the movable mold, but due to the brittleness of the PMMA material itself, it is easy to generate material chips during the production process, resulting in a serious reduction in the qualified rate. At the same time, because the demoulding angle of the movable mold is too small, it is easy to crack, resulting in various defects not being fully detected and flowing into the client, resulting in fines; 3. Process optimization, the production process is unstable, resulting in difficult to guarantee the qualified rate and a high delivery risk. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic opening and closing mold structure for solving the shrinkage of high-gloss B-pillar buckles, which has a simple structural design, quality that meets customer requirements, and a greatly improved pass rate, based on the current status of the existing technology.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an automatic opening and closing mold structure for solving the shrinkage of the high-gloss B-pillar buckle, which is arranged at the straight ejector block, the lower end of the straight ejector block is connected to the ejector rod, the ejector rod is sleeved with a return spring, and the lower end of the ejector rod is connected to the ejector plate. It is characterized in that the straight ejector block has a mechanical elastic block, the injection molded product is located on the mechanical elastic block, the straight ejector block has a spring hole and a pin hole, the pin hole is used to install a pin, the straight ejector block is connected to the mechanical elastic block through the pin, the spring hole is located between the straight ejector block and the mechanical elastic block, and a mechanical spring is installed in the spring hole.

[0005] In the above-mentioned automatic opening and closing mold structure for solving the shrinkage of the high-gloss B-pillar clip, the mechanical spring block has a sickle-shaped hook groove near the extension bone position of the injection molded product.

[0006] In the above-mentioned automatic opening and closing mold structure for solving the shrinkage of the high-gloss B-pillar buckle, there are two spring holes and one pin hole.

[0007] Compared with the existing technology, the advantage of the present invention is that it increases the pulling force of the movable mold of the automatic opening and closing structure injection mold on the product, offsets the adsorption force of the fixed mold on the product, and the product snap structure corresponds to the A side of the product without defects. The quality meets customer requirements, the qualified rate is greatly improved, and the production stability is greatly improved. This patent is a mechanical structure with high repeatability and stability, which can save the company 200,000 yuan per year. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Schematic diagram of the ejection structure of the automatic opening and closing mold to solve the shrinkage of the high-gloss B-pillar clip;

[0009] Figure 2 A partial schematic diagram of the automatic opening and closing mold structure for solving the shrinkage of the high-gloss B-pillar buckle;

[0010] Figure 3 Schematic diagram of the three-dimensional structure of the automatic opening and closing mold structure for solving the shrinkage of the high-gloss B-pillar clip. DETAILED DESCRIPTION

[0011] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0012] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 should not be understood as limiting the scope of protection of the present invention.

[0013] In the figure, there are a straight ejector block 100, an ejector rod 200, an ejector plate 300, a mechanical spring block 400, a pin 500, a mechanical spring 600, an injection molded product 700, a sickle-shaped hook groove 800, and an extended bone position of the injection molded product 900.

[0014] like Figure 1 、 Figure 2 as well as Figure 3As shown, the automatic opening and closing mold structure for solving the shrinkage of the high-gloss B-pillar buckle is set at the straight ejector block 100. The lower end of the straight ejector block 100 is connected to the ejector rod 200. The ejector rod 200 is sleeved with a return spring. The lower end of the ejector rod 200 is connected to the ejector plate 300. Here, the straight ejector block 100 on the ejector rod 200 moves with the ejector plate 300 under the action of the ejector rod of the injection molding machine, thereby ejecting the injection molded product 700 from the movable mold. After that, the ejection mechanism is reset under the action of the return spring and enters the next cycle. The biggest innovation of this patent is that a mechanical elastic block 400 is removed from the center position of the original straight ejector block 100, that is, a mechanical elastic block 400 is set at the straight ejector block 100, and the injection molded product 700 is located on the mechanical elastic block 400. The straight ejector block 100 has a spring hole and a pin hole, there are two spring holes and one pin hole, then Then, a pin is installed in the pin hole, and the straight ejector block 100 is connected to the mechanical spring block 400 through the pin 500. Here, the spring hole is located between the straight ejector block 100 and the mechanical spring block 400, and a mechanical spring 600 is installed in each of the two spring holes. The mechanical spring block 400 and the spring are used here to increase the pulling force of the movable mold of the automatic opening and closing structure injection mold on the product, offsetting the adsorption force of the fixed mold on the injection molded product 700. At the same time, as a further optimization, the mechanical spring block 400 has a sickle-shaped hook groove 800 at 900 near the extension bone position of the injection molded product. In this way, during injection molding, the sickle-shaped hook groove 800 will reduce the glue at this place of the injection molded product 700 to form a claw. When opening the mold, the product can be pulled in combination with the mechanical spring 600, thereby offsetting the suction force of the fixed mold. At the same time, because this structure is achieved by reducing the glue, it has no effect on the assembly and performance of the product.

[0015] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them with similar methods without departing from the scope defined by the spirit of the present invention.

Claims

1. An automatic opening and closing mold structure for solving the shrinkage of the high-gloss B-pillar buckle is set at the straight ejector block. The lower end of the straight ejector block is connected to the ejector rod, and the ejector rod is sleeved with a return spring. The lower end of the ejector rod is connected to the ejector plate, characterized in that: The straight top block is provided with a mechanical spring block, the injection molded product is located on the mechanical spring block, the straight top block has a spring hole and a pin hole, the pin hole is used to install a pin, the straight top block is connected to the mechanical spring block through the pin, the spring hole is located between the straight top block and the mechanical spring block, and a mechanical spring is installed in the spring hole; the mechanical spring block has a sickle-shaped hook groove near the extension bone position of the injection molded product; there are two spring holes and one pin hole.

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