Improved positioning spring block for injection mold

Abstract

The utility model belongs to the automobile plastic product injection moulding technical field, provide a kind of injection mould positioning elastic block improvement mechanism, including movable platen and fixed platen, product is located between movable platen and fixed platen, the symmetric elastic block structure is provided in the upper two ends of product, product injection moulding is formed after fixed platen, movable platen opens mould, under the pushing effect of elastic block structure and to the product ejection limit, and follow mould opening movement together and eject product from movable platen.The utility model's advantage lies in simple structure design, less space occupation, avoid product surface shrinkage forming when increasing injection pressure and other reasons, to avoid the problem such as product sticking fixed mould, drawing flower, drawing injury, drawing crack etc. in injection moulding process.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding technology for automotive plastic parts, and specifically relates to an improved mechanism for positioning spring blocks in injection molds. Background Technology

[0002] With the rapid development of the automotive industry and increasingly stringent environmental requirements, luminous grilles and front / rear B-pillars made of transparent PC materials and high-gloss, paint-free PMMA materials are being increasingly used by domestic and international OEMs. However, when the cavity is polished to a high gloss mirror finish of 13000# with a roughness Ra≤0.003, the fixed mold exhibits a strong adhesion force to the product. Furthermore, due to product structural limitations (the moving mold extension rib is only 1.5mm, making it impossible to adhere to the moving mold) and quality requirements, the product cannot overcome the vacuum adhesion force of the high-gloss mirror finish during injection molding, leading to unnecessary losses. Based on customer product data, this is addressed by reducing the fixed mold release angle. To reduce the adhesion force of the fixed mold caused by the high gloss, process data was modified. The main problems are: unauthorized data modification carries the risk of being discovered by customers, leading to complaints, and does not completely solve the problem; increasing the pulling force of the moving mold by adding texture or reducing the moving mold's ejection angle is problematic because the brittleness of PMMA material easily generates material debris during production, resulting in a significantly reduced pass rate. Furthermore, a too-small moving mold ejection angle can easily cause tearing, leading to various defects not being fully inspected and flowing to the customer, resulting in fines; process optimization and reducing injection pressure result in unstable surface shrinkage fluctuations during production, making it difficult to guarantee the pass rate and posing a significant delivery risk. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an improved mechanism for positioning spring blocks of injection molds, which is based on the current situation of the existing technology. The entire mechanism has a simple structure design and occupies little space, thereby avoiding problems such as product sticking to the mold during injection molding, resulting in scrap, scratches, tears, and cracks.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an improved positioning spring block mechanism for injection mold, including a moving template and a fixed template, wherein the product is located between the moving template and the fixed template. The product is characterized in that symmetrical spring block structures are provided at both ends above the product. After the product is injection molded, the fixed template and the moving template open the mold. Under the pushing action of the spring block structure, the product is ejected and limited, and the spring block structure moves together with the mold opening to eject the product from the moving template.

[0005] In the above-mentioned improved positioning spring block mechanism for injection mold, the spring block structure includes a spring block, a spring block spring, and a limiting screw. The lower end of the spring block presses on the product. There is a spring space between the fixed platen and the spring block for the spring block spring to be installed. The spring block spring is installed in the spring space and provides elastic force. A limiting hole is opened on the spring block, and the limiting screw is located in the limiting hole and passes through the spring block and the fixed platen.

[0006] In the above-mentioned improved positioning spring block mechanism for injection molds, there are two sets of spring block structures, namely a left spring block structure and a right spring block structure. The position of the right spring block structure on the fixed template is lower than that of the left spring block structure on the fixed template.

[0007] In the above-mentioned improved mechanism for positioning spring blocks in injection molds, the spring block spring in the right spring block structure is symmetrical with respect to the limiting screw.

[0008] Compared with the prior art, the advantages of this utility model are:

[0009] 1. The structure is simple and occupies little space. It achieves the purpose of adding a product ejection front mold without changing the original mold fixed mold structure, thus solving the problem of sticking to the fixed mold that traditional molds cannot overcome.

[0010] 2. It effectively solves the problem of the product sticking to the mold due to the high gloss surface of the fixed mold, the fact that most of the product's glue is inside the fixed mold cavity, and the need to avoid increasing the injection pressure during product surface shrinkage molding. This prevents the product from sticking to the fixed mold during injection molding, thus avoiding problems such as scrap, scratches, tears, and cracks caused by the product sticking to the fixed mold.

[0011] 3. It can reduce the number of defective injection molded products, improve quality to meet customer quality requirements, and avoid complaints; at the same time, it can reduce the huge cost losses caused by debugging and production in the factory. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the improved positioning spring mechanism of this injection mold. Detailed Implementation

[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0014] In the diagram, the moving template is 100; the fixed template is 200; the product is 300; the left spring block structure is 400; the right spring block structure is 500; the spring block is 600; the spring block spring is 700; the limit screw is 800; the spring space is 900; and the limit hole is 1000.

[0015] like Figure 1As shown, this improved injection mold positioning spring block mechanism includes a moving platen 100 and a fixed platen 200. The product 300 is located between the moving platen 100 and the fixed platen 200. Symmetrical spring block structures are provided at both ends above the product 300. After the product 300 is injection molded, the fixed platen 200 and the moving platen 100 open the mold. Under the pushing action of the spring block structure, the product 300 is ejected and limited, and moves together with the mold opening to eject the product 300 from the moving platen 100. Here, in order to facilitate the ejection of the product 300 and For resetting, this patent has two sets of spring block structures: a left spring block structure 400 and a right spring block structure 500. The right spring block structure 500 is positioned lower than the left spring block structure 400 on the fixed template 200. This facilitates demolding and ejection when the product 300 is placed at an angle. Specifically, the spring block structure includes a spring block 600, a spring block spring 700, and a limiting screw 800. The lower end of the spring block 600 presses against the product 300, and there is a spring supply mechanism between the fixed template 200 and the spring block 600. The spring block 700 is installed in the spring space 900, and provides elastic force. A limit hole 1000 is opened on the spring block 600. A limit screw 800 is located in the limit hole 1000 and passes between the spring block 600 and the fixed mold plate 200. Here, the limit screw 800 mainly serves as a guide during ejection. The spring block 700 provides elastic force. This adds a spring block structure to the ejection of the product 300 by the fixed mold in the injection mold, offsetting the suction force of the fixed mold plate 200 on the product 300. (Right spring block...) In structure 500, the spring block 700 is symmetrical to the limiting screw 800. Here, most of the product 300 is glued to the fixed mold plate 200, which is easy to stick to the mold. After injection molding, the fixed mold plate 200 and the moving mold plate 100 open. Under the pushing action of the spring block 700, the spring block is ejected at the moment of mold opening. It is limited by the limiting screw 800. After the mold opens to the position, the ejector plate moves together with the mold to eject the product 300 from the moving mold plate 100. Then, the mold closes and the moving mold plate 100 presses the spring block mechanism back into place, and the next cycle begins.

[0016] The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications to the described specific embodiments or adopt similar methods to replace them, but without departing from the scope defined by the spirit of this utility model.

Claims

1. An improved positioning spring block mechanism for injection molds, comprising a movable template and a fixed template, wherein the product is located between the movable template and the fixed template, characterized in that, The product has symmetrical spring block structures at both ends. After the product is injection molded, the fixed mold plate and the moving mold plate open. Under the pushing action of the spring block structure, the product is ejected and limited. The spring block structure moves together with the mold opening to eject the product from the moving mold plate.

2. The improved positioning spring block mechanism for injection molds according to claim 1, characterized in that, The aforementioned spring block structure includes a spring block, a spring block spring, and a limiting screw. The lower end of the spring block presses against the product. There is a spring space between the fixed template and the spring block for the spring block spring to be installed. The spring block spring is installed in the spring space and provides elastic force. A limiting hole is opened on the spring block, and the limiting screw is located in the limiting hole and passes through the spring block and the fixed template.

3. The improved mechanism for positioning spring blocks in injection molds according to claim 2, characterized in that, The aforementioned spring block structure consists of two sets: a left spring block structure and a right spring block structure. The right spring block structure is positioned lower than the left spring block structure on the fixed template.

4. The improved mechanism for positioning spring blocks in injection molds according to claim 3, characterized in that, The spring in the right spring block structure is symmetrical with respect to the limiting screw.

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