Demolding structure for plastic mold

Abstract

The utility model discloses a demoulding structure for a plastic mould, and particularly relates to the field of mould demoulding, the demoulding structure comprises a bottom plate, the top surface of the bottom plate is fixedly provided with a mould cylinder, the top surface of the mould cylinder is detachably provided with a top cover, the middle part of the top cover is communicated with an injection molding port, and the bottom surface of the top cover is provided with two grooves; a placement plate is arranged on the other side of the top surface of the bottom plate, an insertion plate is clamped to one side of the placement plate, a plastic column body is placed on the placement plate, and two protrusions are connected to one side of the plastic column body; a mounting frame is mounted on one side of the top face of the bottom plate, an electric push rod is mounted on the mounting frame, and the telescopic end of the electric push rod is connected with a cutter. According to the utility model, the two grooves are formed in the top cover, so that the top surface of the plastic cylinder is provided with the two bulges during injection molding, and the two bulges can be pulled to take out the plastic cylinder from the mold cylinder during demolding, so that the demolding efficiency is improved, the operation is simple and convenient, the bulges on the taken-out plastic cylinder can be cut off by a cutter, and the production efficiency is improved. And the subsequent operation is not influenced by the plastic column body.

Description

Technical Field

[0001] This utility model relates to the field of mold demolding technology, specifically a demolding structure for plastic molds. Background Technology

[0002] A plastic mold is a tool used to produce plastic products. It deforms and shapes the plastic material by heating or cooling it within the mold. Plastic molds play a crucial role in the plastics processing industry, serving as key tools for producing a wide variety of plastic products. Through different molding methods, such as injection molding, compression molding, and extrusion, they give plastic products their complete shape and precise dimensions.

[0003] When demolding plastic molds after injection molding, the molds need to be pulled out manually. Sometimes, if they cannot be pulled out directly, external tools such as demolding pins or rubber mallets are required. This can easily damage the mold surface and affect the shape and quality of the mold.

[0004] Therefore, we have made improvements to this by proposing a demolding structure for plastic molds. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a demolding structure for a plastic mold, including a base plate, a mold cylinder fixed to the top surface of the base plate, a top cover detachably mounted on the top surface of the mold cylinder, an injection port connected to the middle of the top cover, and two grooves formed on the bottom surface of the top cover; a partition plate is fixedly mounted on one side of the top surface of the base plate, an injection box is fixedly mounted on one side of the partition plate, and a variable pump is mounted on the top surface of the injection box, with an injection pipe connected to the outlet of the variable pump;

[0007] A placement plate is fixedly installed on the other side of the top surface of the base plate. An insert plate is snapped into one side of the placement plate, and a plastic column is placed on the placement plate. Two protrusions are connected to one side of the plastic column. A mounting bracket is installed on one side of the top surface of the base plate. An electric push rod is installed on the mounting bracket, and a cutter is fixedly connected to the telescopic end of the electric push rod.

[0008] As a preferred embodiment of this utility model, the top cover and the mold cylinder are both provided with fixing holes. The top cover is fixed to the mold cylinder by fastening bolts, and the fastening bolts are matched with the fixing holes.

[0009] In a preferred embodiment of this invention, the protrusion matches the groove.

[0010] As a preferred embodiment of this utility model, one side of the placement plate is open, and a support plate is installed on one side of the placement plate, and there is a distance between the support plate and the placement plate, the width of which is greater than the width of the cutter.

[0011] As a preferred technical solution of this utility model, the top surface of the support plate is provided with two limiting grooves that match the protrusions, and a slot is provided on one side of the support plate and the side of the placement plate, and the insertion plate is engaged in the two slots.

[0012] As a preferred embodiment of this utility model, a placement frame for placing protrusions is fixedly installed on one side of the base plate.

[0013] As a preferred embodiment of this utility model, the top surface of the placement plate is an arc-shaped surface, and the arc-shaped surface is in contact with the surface of the plastic column.

[0014] The beneficial effects of this utility model are:

[0015] In this invention, by opening two grooves on the top cover, two protrusions are made on the top surface of the plastic column during injection molding. Then, during demolding, the two protrusions can be pulled to remove the plastic column from the mold cylinder, which improves demolding efficiency and simplifies operation. The protrusions on the removed plastic column can be cut off with a cutter so that the plastic column does not affect subsequent operations. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of a demolding structure for a plastic mold according to this utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of a demolding structure for a plastic mold according to this utility model. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of a demolding structure for a plastic mold according to this utility model. Figure 3 ;

[0020] Figure 4 This is a schematic diagram of a demolding structure for a plastic mold according to this utility model. Figure 4 .

[0021] In the diagram: 1. Base plate; 2. Mold cylinder; 3. Top cover; 4. Injection port; 5. Injection box; 6. Variable pump; 7. Partition plate; 8. Mounting bracket; 9. Electric push rod; 10. Cutter; 11. Placement frame; 12. Plastic column; 13. Insert plate; 14. Placement plate; 15. Slot; 16. Protrusion; 17. Support plate; 18. Injection tube; 19. Groove; 20. Fastening bolt. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Example: Figures 1 to 4 As shown, this utility model discloses a demolding structure for a plastic mold, including a base plate 1, a mold cylinder 2 fixed on the top surface of the base plate 1, a top cover 3 detachably installed on the top surface of the mold cylinder 2, an injection port 4 connected in the middle of the top cover 3, and two grooves 19 formed on the bottom surface of the top cover 3; during injection molding, the top cover 3 is first installed on the mold cylinder 2, and then thermoplastic plastic is injected into the mold cylinder 2 through the injection port 4. After injection molding, the grooves 19 are formed into protrusions 16, which facilitates the demolding process by pulling the protrusions 16 to pull the formed plastic column 12 out of the mold cylinder 2.

[0024] A partition 7 is fixedly installed on one side of the top surface of the base plate 1, and an injection box 5 is fixedly installed on one side of the partition 7. A variable pump 6 is installed on the top surface of the injection box 5, and the outlet of the variable pump 6 is connected to an injection pipe 18. One end of the injection pipe 18 is connected to a stretchable connecting pipe, which is generally fixedly connected to the injection port 4. Under the action of the variable pump 6, thermoplastic plastic is injected into the mold cylinder 2 through the injection pipe 18 and the connecting pipe.

[0025] A placement plate 14 is fixedly installed on the other side of the top surface of the base plate 1. An insert plate 13 is snapped into one side of the placement plate 14, and a plastic column 12 is placed on the placement plate 14. Two protrusions 16 are connected to one side of the plastic column 12. A mounting bracket 8 is installed on one side of the top surface of the base plate 1. An electric push rod 9 is installed on the mounting bracket 8. A cutter 10 is fixedly connected to the telescopic end of the electric push rod 9.

[0026] After the plastic column 12 is formed, it is taken out and placed on the placement plate 14. Then, under the action of the electric push rod 9, the cutter 10 is moved down and the excess protrusions 16 are cut off by the cutter 10 to prevent them from affecting the subsequent use of the plastic column 12.

[0027] Fixing holes are provided on the side of the top cover 3 and the side of the mold cylinder 2. The top cover 3 is fixed to the mold cylinder 2 by fastening bolts 20, which match the fixing holes. Fixing the top cover 3 and the mold cylinder 2 by fastening bolts 20 can enhance the tightness of the connection between the top cover 3 and the mold cylinder 2.

[0028] The protrusion 16 matches the groove 19. The thermoplastic material injected into the mold cylinder 2 fills the groove 19 and is formed into the protrusion 16 after it cools down.

[0029] One side of the placement plate 14 is open, and a support plate 17 is installed on one side of the placement plate 14. There is a distance between the support plate 17 and the placement plate 14, and the width of the distance is greater than the width of the cutter 10. The cutter 10 is located at the top of the connection between the protrusion 16 and the plastic column 12. The protrusion 16 is supported by the support plate 17. The distance between the support plate 17 and the placement plate 14 facilitates the passage of the cutter 10, separating the protrusion 16 from the plastic column 12.

[0030] The top surface of the support plate 17 has two limiting grooves that match the protrusion 16, and one side of the support plate 17 and the other side of the placement plate 14 are respectively provided with slots 15, and the insert plate 13 is engaged in the two slots 15. After the protrusion 16 is cut off, the insert plate 13 can be removed, and the plastic column 12 can be removed from the insert plate 13.

[0031] A placement frame 11 for placing protrusions 16 is fixedly installed on one side of the base plate 1. The placement frame 11 is used to place the cut-off protrusions 16. After the protrusions 16 are collected, they can be used for other purposes. Therefore, in the design, the size of the groove 19 can be designed to be the size that can be used for plastic.

[0032] The top surface of the placement plate 14 is curved, and the curved surface is in contact with the surface of the plastic column 12. A rubber pad is attached to the surface of the curved surface to increase the friction between the plate and the plastic column 12.

[0033] During operation, two grooves 19 are made on the top cover 3, so that there are two protrusions 16 on the top surface of the plastic column 12 during injection molding. Then, during demolding, the two protrusions 16 can be pulled to remove the plastic column 12 from the mold cylinder 2, which improves demolding efficiency and simplifies operation. The protrusions 16 on the removed plastic column 12 can be cut off by the cutter 10 so that the plastic column 12 does not affect subsequent operations.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A demolding structure for a plastic mold, comprising a base plate (1), wherein a mold cylinder (2) is fixed to the top surface of the base plate (1), characterized in that, The top surface of the mold cylinder (2) is detachably fitted with a top cover (3), and the middle part of the top cover (3) is connected to an injection port (4), and the bottom surface of the top cover (3) has two grooves (19); a partition (7) is fixedly installed on one side of the top surface of the bottom plate (1), and an injection box (5) is fixedly installed on one side of the partition (7), and a variable pump (6) is installed on the top surface of the injection box (5), and the outlet of the variable pump (6) is connected to an injection pipe (18); A placement plate (14) is fixedly installed on the other side of the top surface of the base plate (1). A plug plate (13) is snapped into one side of the placement plate (14), and a plastic column (12) is placed on the placement plate (14). Two protrusions (16) are connected to one side of the plastic column (12). An installation frame (8) is installed on one side of the top surface of the base plate (1). An electric push rod (9) is installed on the installation frame (8), and a cutter (10) is fixedly connected to the telescopic end of the electric push rod (9).

2. The demolding structure for a plastic mold according to claim 1, characterized in that, Fixing holes are provided on the side of the top cover (3) and the side of the mold cylinder (2). The top cover (3) is fixed to the mold cylinder (2) by fastening bolts (20), and the fastening bolts (20) match the fixing holes.

3. The demolding structure for a plastic mold according to claim 1, characterized in that, The protrusion (16) matches the groove (19).

4. The demolding structure for a plastic mold according to claim 1, characterized in that, One side of the placement plate (14) is open, and a support plate (17) is installed on one side of the placement plate (14), and there is a distance between the support plate (17) and the placement plate (14), the width of which is greater than the width of the cutter (10).

5. The demolding structure for a plastic mold according to claim 4, characterized in that, The top surface of the support plate (17) has two limiting grooves that match the protrusion (16), and the support plate (17) and the placement plate (14) are respectively provided with slots (15), and the insert plate (13) is engaged in the two slots (15).

6. The demolding structure for a plastic mold according to claim 1, characterized in that, A placement frame (11) for placing protrusions (16) is fixedly installed on one side of the base plate (1).

7. The demolding structure for a plastic mold according to claim 1, characterized in that, The top surface of the placement plate (14) is an arc-shaped surface, and the arc-shaped surface is in contact with the surface of the plastic column (12).

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