Double-action ejector

Abstract

The utility model discloses a secondary ejection mould, including movable template, first roof, second roof, first tapper, second tapper, small roof, small top needle, top post, reset spring, the first roof is located the top of second roof, and reset spring installs between movable template and first roof, and first tapper is fixed on the first roof, and second tapper is fixed on the second roof, and the upper end clearance of second tapper passes through first roof, movable template and then is supported on the bottom surface of small roof, and small roof movable mounting is in movable template, and the lower end of small top needle is fixed on small roof. First time ejection, second roof drives second tapper, second tapper drives small roof, and small roof drives small top needle first ejection certain distance (the clearance distance of first roof and second roof) after second roof supports on first roof, and first roof drives first tapper and ejects plastic product, realizes secondary ejection, realizes the intact ejection of thin wall plastic product.

Description

Technical Field

[0001] This utility model relates to an injection mold, and more particularly to a secondary ejection mold. Background Technology

[0002] Plastic injection molds are tools used in the production of plastic products and have a wide range of applications. In the injection molding of plastic products, for example... Figure 1 As shown, one end of the plastic product 100 is composed of multiple thin outer walls 101. If the ejector pin directly presses against these thin outer walls 101, the outer walls 101 are easily damaged due to the large demolding force. Therefore, the traditional ejection mechanism cannot be used. Utility Model Content

[0003] The purpose of this invention is to provide a secondary ejection mold that enables thin-walled plastic products to be ejected intact.

[0004] To achieve the above objectives, the technical solution of this utility model is:

[0005] This utility model is a secondary ejection mold, including a moving template, a first ejector plate, a second ejector plate, a first ejector rod, a second ejector rod, a small ejector plate, a small ejector pin, an ejector column, and a return spring;

[0006] The first top plate is located above the second top plate. The upper end of the top column is fixed to the first top plate. The top column passes through the through hole in the middle of the second top plate, so that there is an ejection gap between the first top plate and the second top plate. The return spring is installed between the moving template and the first top plate. The lower end of the first top rod is fixed to the first top plate. The upper end of the first top rod passes through the moving template and extends into the cavity. The lower end of the second top rod is fixed to the second top plate. The upper end of the second top rod passes through the first top plate and the moving template and abuts against the bottom surface of the small top plate. The small top plate is movably installed in the moving template. The lower end of the small ejector pin is fixed to the small top plate. The upper end of the small ejector pin passes through the moving template and extends into the cavity.

[0007] This utility model also includes a panel, a fixed mold clamping plate, a fixed template, a square iron, and a base plate; the panel, the fixed mold clamping plate, and the fixed template are fixed together in sequence, the fixed template is in contact with the moving template, the moving template is fixed to the base plate by the square iron, and an ejection space is formed between the moving template and the base plate, and the first top plate and the second top plate are installed in the ejection space in sequence.

[0008] After adopting the above solution, since this utility model includes a first top plate, a second top plate, a first push rod, a second push rod, a small top plate, a small ejector pin, a push column, and a return spring, during the first ejection, the second top plate drives the second push rod, the second push rod drives the small top plate, and the small top plate drives the small ejector pin to first eject the plastic product a certain distance (the gap distance between the first top plate and the second top plate). Then, the second top plate presses against the first top plate, and the first top plate drives the first push rod to eject the plastic product, realizing a secondary ejection and achieving the intact ejection of the thin-walled plastic product.

[0009] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0010] Figure 1 Axonometric drawing of a plastic product;

[0011] Figure 2 This is a cross-sectional view of the present invention along the first top rod section;

[0012] Figure 3 This is a sectional view of the present invention along the cross-section of the second top rod;

[0013] Figure 4 This is an isometric drawing of the ejection mechanism of this utility model. Detailed Implementation

[0014] like Figures 2-4 As shown, this utility model is a secondary ejection mold, including a panel 1, a fixed mold clamping plate 2, a fixed template 3, a moving template 4, a square iron (not shown in the figure), a base plate 6, a first ejector plate 7, a second ejector plate 8, a first ejector rod 9, a second ejector rod 10, a small ejector plate 11, a small ejector pin 12, an ejector column 13, and a return spring 14.

[0015] The panel 1, fixed mold clamping plate 2, and fixed template 3 are fixed together in sequence. The fixed template 3 is abutted against the movable template 4. The movable template 4 is fixed to the base plate 6 by square iron, forming an ejection space between the movable template 4 and the base plate 6. The first top plate 7 is located above the second top plate 8. The first top plate 7 and the second top plate 8 are installed in the ejection space in sequence. The upper end of the top post 13 is fixed to the first top plate 7. The top post 13 passes through the through hole 81 in the middle of the second top plate 8, so that there is an ejection gap between the first top plate 7 and the second top plate 8. The positioning spring 14 is installed between the moving template 4 and the first top plate 7. The lower end of the first ejector rod 9 is fixed on the first top plate 7. The upper end of the first ejector rod 9 passes through the moving template 4 and extends into the cavity. The lower end of the second ejector rod 10 is fixed on the second top plate 8. The upper end of the second ejector rod 10 passes through the first top plate 9 and the moving template 4 and rests against the bottom surface of the small top plate 11. The small top plate 11 is movably installed inside the moving template 4. The lower end of the small ejector pin 12 is fixed on the small top plate 11. The upper end of the small ejector pin 12 passes through the moving template 4 and extends into the cavity.

[0016] The working principle of this utility model:

[0017] During the first ejection, the second top plate 7 drives the second top rod 10, the second top rod 10 drives the small top plate 11, and the small top plate 11 drives the small ejector pin 12 to eject the plastic product 100 a certain distance (the gap between the first top plate 7 and the second top plate 8). Then the second top plate 8 rests against the first top plate 7, and the first top plate 7 drives the first top rod 9 to eject the plastic product 100, thus achieving the second ejection.

[0018] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model should still fall within the scope of the patent of the present utility model.

Claims

1. A secondary ejection mold, characterized in that: Includes a moving template, a first top plate, a second top plate, a first top rod, a second top rod, a small top plate, a small ejector pin, a top column, and a return spring; The first top plate is located above the second top plate. The upper end of the top column is fixed to the first top plate. The top column passes through the through hole in the middle of the second top plate, so that there is an ejection gap between the first top plate and the second top plate. The return spring is installed between the moving template and the first top plate. The lower end of the first top rod is fixed to the first top plate. The upper end of the first top rod passes through the moving template and extends into the cavity. The lower end of the second top rod is fixed to the second top plate. The upper end of the second top rod passes through the first top plate and the moving template and abuts against the bottom surface of the small top plate. The small top plate is movably installed in the moving template. The lower end of the small ejector pin is fixed to the small top plate. The upper end of the small ejector pin passes through the moving template and extends into the cavity.

2. The secondary ejection mold according to claim 1, characterized in that: It also includes a panel, a fixed mold clamping plate, a fixed template, a square iron, and a base plate; the panel, the fixed mold clamping plate, and the fixed template are fixed together in sequence, the fixed template is in contact with the moving template, the moving template is fixed to the base plate by the square iron, and an ejection space is formed between the moving template and the base plate, and the first top plate and the second top plate are installed in the ejection space in sequence.

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