A spring ejection device

Abstract

This utility model relates to the field of injection molding production, specifically a spring ejection device, including a fixed plate, a male mold, a female mold, and ejector inserts. An injection cavity is provided between the male and female molds, and at least one ejector insert is provided on one side of the injection cavity. An ejection channel is provided on the female mold, communicating with the injection cavity, and the ejector insert is disposed within the ejection channel. The fixed plate is located on the side of the female mold away from the injection cavity, and the fixed plate contacts the ejector insert. This utility model adds ejector inserts to areas where the product easily sticks to the female mold. The spring force ensures that the female mold ejector block ejects along with the product when the mold opens, guaranteeing that the product adheres to the male mold side before being ejected by the male mold ejector pins. The overall structure is simple, widely applicable, and effectively reduces the product defect rate during production.

Description

Technical Field

[0001] This utility model relates to the field of injection molding production, specifically a spring ejection device. Background Technology

[0002] Injection molding is a processing method used for the mass production of complex-shaped parts. Specifically, it involves injecting molten plastic into a mold cavity under high pressure using an injection molding machine, where it cools and solidifies to obtain the molded product. Injection molds are classified into thermosetting plastic molds and thermoplastic plastic molds based on their molding characteristics; and into transfer molds, blow molds, casting molds, thermoforming molds, hot press molds (compression molds), and injection molds based on their molding process. Injection molds are essential process equipment for producing various industrial products and are widely used in industries such as aerospace, electronics, machinery, shipbuilding, and automotive.

[0003] During the injection mold production process, the injection molded product needs to be ejected by the ejection mechanism. However, due to structural features (such as many deep ribs and snap-fit ​​structures on the side of the female mold), some products may stick to the side of the female mold during demolding, causing the product to be stretched and deformed, scratched, or warped and unable to be demolded, thus affecting product quality.

[0004] Therefore, there is an urgent need for a spring ejection device suitable for injection molding production. Utility Model Content

[0005] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a spring ejection device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a spring ejection device, comprising a fixed plate, a male mold, a female mold, and an ejector insert;

[0007] An injection cavity is provided between the male mold and the female mold, and at least one ejector insert is provided on one side of the injection cavity; an ejector channel is provided on the female mold, which communicates with the injection cavity, and the ejector insert is provided in the ejector channel; a fixing plate is provided on the side of the female mold away from the injection cavity, and the fixing plate is in contact with the ejector insert.

[0008] The present invention is further configured such that: the pop-out insert includes a pop-out block, one end of which is provided with a spring, and the other end is provided with a snap-fit ​​groove.

[0009] The present invention is further configured such that: the fixed plate is provided with an ejection groove, the spring of the ejector block is disposed in the ejection groove, and the snap-fit ​​groove of the ejector block extends into the injection cavity.

[0010] During injection molding, the part of the injection-molded product that contacts the snap-fit ​​groove of the ejector block will match the shape of the snap-fit ​​groove, so that the product snaps into the ejector block; then, through the elastic force between the spring and the fixed plate, the ejector block will push the product out, preventing it from sticking to the master mold.

[0011] The present invention is further configured such that: a limiting groove is provided on the female mold, and the limiting groove is connected to the pop-out channel.

[0012] The present invention is further configured such that: a protruding limiting block is provided on one side of the pop-out block, and when the pop-out block is inserted into the pop-out channel, the limiting block extends into the limiting groove.

[0013] The limiting block moves within the length range of the limiting groove, thereby limiting the pop-out stroke of the pop-out block and preventing the pop-out block from directly detaching from the mother mold due to excessive pop-out stroke.

[0014] The present invention is further configured such that the length by which the limiting block can move along the limiting groove is the pop-out stroke of the pop-out insert, and the pop-out stroke is greater than the product height on the mother mold side.

[0015] The present invention is further configured such that the pop-out stroke is 3mm-5mm.

[0016] The present invention is further configured such that: the spring ejection device also includes a male mold ejector pin, and a plurality of ejector pin channels are provided in the male mold, and the male mold ejector pin extends into the injection cavity through the ejector pin channels.

[0017] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0018] This invention adds a pop-out insert to the area where the product easily sticks to the female mold. The spring force causes the female mold spring block to pop out along with the product when the mold opens, ensuring the product adheres to the male mold side. The product is then ejected by the male mold ejector pin. The overall structure is simple, widely applicable, and effectively reduces the product defect rate during production. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.

[0022] Figure 3 This is a schematic diagram of the structure of the male mold side and the pop-out insert.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Female mold; 11. Limiting groove; 2. Male mold;

[0025] 3. Pop-out insert; 31. Spring; 32. Snap-fit ​​groove; 33. Limit block;

[0026] 4. Injection cavity; 5. Fixing plate; 51. Ejector groove; 6. Male mold ejector pin. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this utility model, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this utility model. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the scope of this utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0030] Example:

[0031] like Figures 1-3 As shown, this is a preferred embodiment of the present invention, a spring ejection device, including a fixing plate 5, a male mold 2, a female mold 1 and an ejector insert 3;

[0032] like Figure 1 As shown, an injection cavity 4 is provided between the male mold 2 and the female mold 1, and at least one pop-out insert 3 is provided on one side of the injection cavity 4; a pop-out channel is provided on the female mold 1, which is connected to the injection cavity 4, and the pop-out insert 3 is provided in the pop-out channel; the fixing plate 5 is provided on the side of the female mold 1 away from the injection cavity 4, and the fixing plate 5 is in contact with the pop-out insert 3.

[0033] Combination Figure 2 As shown, the pop-out insert 3 includes a pop-out block, one end of which is provided with a spring 31, and the other end is provided with a snap-fit ​​groove 32.

[0034] The fixed plate 5 is provided with an ejection groove 51, the spring 31 of the ejection block is disposed in the ejection groove 51, and the snap-fit ​​groove 32 of the ejection block extends into the injection cavity 4.

[0035] During injection molding, the part of the injection-molded product that contacts the snap-fit ​​groove 32 of the ejector block will match the shape of the snap-fit ​​groove 32, so that the product snaps into the ejector block; then, through the elastic force between the spring 31 and the fixing plate 5, the ejector block will push the product out, so as to avoid sticking to the mother mold 1.

[0036] The female mold 1 is also provided with a limiting groove 11, which is connected to the pop-out channel. A protruding limiting block 33 is provided on one side of the pop-out block. When the pop-out block is inserted into the pop-out channel, the limiting block 33 extends into the limiting groove 11.

[0037] The limiting block 33 moves within the length range of the limiting groove 11, thereby limiting the pop-out stroke of the pop-out block and preventing the pop-out block from directly detaching from the mother mold 1 due to excessive pop-out stroke.

[0038] The length by which the limiting block 33 can move along the limiting groove 11 is the pop-out stroke of the pop-out insert 3, and the pop-out stroke is greater than the product height on the side of the female mold 1. Generally, the pop-out stroke is 3mm-5mm.

[0039] Combination Figure 3 As shown, the spring ejection device also includes a male mold ejector pin 6. The male mold 2 is provided with multiple ejector pin channels, and the male mold ejector pin 6 extends into the injection cavity 4 through the ejector pin channels.

[0040] After the actual injection molding is completed, the spring force between the spring 31 and the fixed plate 5 causes the ejector insert 3 to eject the product out of the female mold 1. After the female mold 1 is removed, the male mold ejector pin 6 ejects the product out of the male mold 2, completing the overall demolding.

[0041] Finally, it should be noted that the above-described embodiments only illustrate one or more implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A spring ejection device, characterized in that, Includes a fixed plate, male mold, female mold, and ejector inserts; An injection cavity is provided between the male mold and the female mold, and at least one ejector insert is provided on one side of the injection cavity; an ejector channel is provided on the female mold, which communicates with the injection cavity, and the ejector insert is provided in the ejector channel; a fixing plate is provided on the side of the female mold away from the injection cavity, and the fixing plate is in contact with the ejector insert.

2. The spring ejection device according to claim 1, characterized in that, The pop-out insert includes a pop-out block, one end of which is provided with a spring and the other end with a snap-fit ​​groove.

3. The spring ejection device according to claim 2, characterized in that, The fixed plate is provided with an ejection groove, the spring of the ejection block is disposed in the ejection groove, and the snap-fit ​​groove of the ejection block extends into the injection cavity.

4. The spring ejection device according to claim 3, characterized in that, The master mold is also provided with a limiting groove, which is connected to the pop-out channel.

5. A spring ejection device according to claim 4, characterized in that, A protruding limiting block is provided on one side of the pop-out block. When the pop-out block is inserted into the pop-out channel, the limiting block extends into the limiting groove.

6. A spring ejection device according to claim 5, characterized in that, The length by which the limiting block can move along the limiting groove is the pop-out stroke of the pop-out insert, and the pop-out stroke is greater than the product height on the mother mold side.

7. A spring ejection device according to claim 6, characterized in that, The pop-out travel is 3mm-5mm.

8. A spring ejection device according to claim 1, characterized in that, The spring ejection device also includes a male mold ejector pin, and the male mold is provided with multiple ejector pin channels, through which the male mold ejector pin extends into the injection cavity.

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