A multi-layer co-extrusion molding die for mushroom rings

Abstract

This utility model belongs to the field of mold technology, specifically a multi-layer co-extrusion molding die for mushroom rings, including a multi-layer co-extrusion molding die body; a feeding pipe is connected to the side wall of the multi-layer co-extrusion molding die body; an extrusion cylinder is connected to the end of the feeding pipe; a thumb electric push rod is fixedly connected to the top of the extrusion cylinder; a connecting plate is fixedly connected to the top output end of the thumb electric push rod; a heat insulation plate is fixedly connected to the bottom of the connecting plate; by providing heat insulation plates between multiple feeding pipes, when materials of different temperatures are input into the feeding pipes, the heat insulation plates can reduce the temperature influence between different feeding pipes, so that the material input into the multi-layer co-extrusion molding die body is at the set temperature, improving the molding effect of the mushroom ring and reducing the product cracking problem caused by temperature differences outside the set value.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically a multi-layer co-extrusion molding mold for mushroom rings. Background Technology

[0002] The mushroom-shaped ring multilayer co-extrusion molding die is a special mold used to produce multilayer composite plastic products. Its core structure adopts a biomimetic mushroom-shaped ring design, and the precise layering and distribution of melt is achieved through layered flow channels.

[0003] Multi-layer co-extrusion molding die delivers molten plastics with different properties to the co-extrusion die head through multiple extruders. Each layer of melt maintains stable temperature and pressure control within the die head through independent flow channels, and finally, a multi-layer structure is formed near the die lip.

[0004] In existing co-extrusion molding dies, different materials are extruded into the die simultaneously to achieve multi-layer molding of different materials. During the extrusion process, it was found that different materials are input at different temperatures, and the temperatures between the feed pipes affect each other, which can lead to problems such as cracks or delamination in the molded product.

[0005] Therefore, this utility model provides a multi-layer co-extrusion molding die for mushroom rings. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: The multi-layer co-extrusion molding die for mushroom rings of this utility model includes a multi-layer co-extrusion molding die body; a feeding pipe is connected to the side wall of the multi-layer co-extrusion molding die body; an extrusion cylinder is connected to the end of the feeding pipe; a thumb electric push rod is fixedly connected to the top of the extrusion cylinder; a connecting plate is fixedly connected to the top output end of the thumb electric push rod; a heat insulation plate is fixedly connected to the bottom of the connecting plate; by providing heat insulation plates between multiple feeding pipes, when materials of different temperatures are input into the feeding pipes, the heat insulation plates can reduce the temperature influence between different feeding pipes, so that the material input into the multi-layer co-extrusion molding die body is at the set temperature, thereby improving the molding effect of the mushroom ring and reducing the product cracking problem caused by temperature differences outside the set value.

[0008] Furthermore, multiple spring rods are fixedly connected to the side wall of the heat insulation plate; an extrusion plate is fixedly connected to the end of the spring rod; the extrusion plate is arc-shaped; by setting the extrusion plate, the heat loss problem when there is material being conveyed inside the conveying pipe can be reduced, and the temperature stability of the material conveying can be further improved.

[0009] Furthermore, a guide plate is fixedly connected to the top and bottom of the extrusion plate; the guide plate is arc-shaped; by providing a guide plate on the extrusion plate, when the heat insulation plate moves up and down, the guide plate will first contact the conveying pipe. At this time, the arc shape of the guide plate can guide the extrusion plate to move to both sides. During the process of the spring rod moving to be horizontal with the conveying pipe, the extrusion plate can gradually wrap around the conveying pipe to achieve heat preservation of the conveying pipe. This setting enables the extrusion plate to automatically fit with the conveying pipe when the heat insulation plate descends.

[0010] Furthermore, multiple rollers are rotatably connected to the center of the guide plate; by providing rollers on each of the guide plates, when the guide plate is close to the conveying pipe, the rollers are spaced between the guide plate and the conveying pipe, replacing the sliding friction between the guide plate and the conveying pipe with rolling friction, thereby reducing the wear on the conveying pipe.

[0011] Furthermore, a flexible insulation board is fixed to the side wall of the extrusion plate; the flexible insulation board is located on the side of the extrusion plate away from the spring rod; by providing a flexible insulation board on the extrusion plate, the insulation effect of the extrusion plate on the conveying pipe can be further improved when the extrusion plate is attached to the conveying pipe. At the same time, because the flexible insulation board is flexible, after the extrusion plate is attached to the conveying pipe, the flexible insulation board fills the gap between the extrusion plate and the conveying pipe through deformation, further improving the insulation effect.

[0012] Furthermore, an elastic cloth is connected between the heat insulation plate and the extrusion plate; one end of the elastic cloth is fixed to the side wall of the heat insulation plate, and the other end is fixed to the side wall of the extrusion plate; the elastic cloth is sleeved on the spring rod. By providing an elastic cloth on the spring rod, the influence of external dust and impurities on the spring rod can be reduced, and the stability of the spring rod's extension and contraction can be improved.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The multi-layer co-extrusion molding die for mushroom rings described in this utility model has heat insulation plates between multiple feed pipes. When materials of different temperatures are input into the feed pipes, the heat insulation plates can reduce the temperature influence between different feed pipes, so that the material is input into the multi-layer co-extrusion molding die body at the set temperature, thereby improving the molding effect of mushroom rings and reducing product cracking caused by temperature differences outside the set value.

[0015] 2. The multi-layer co-extrusion molding die for mushroom rings described in this utility model, by providing a flexible insulation board on the extrusion plate, can further enhance the insulation effect of the extrusion plate on the conveying pipe when the extrusion plate is attached to the conveying pipe. At the same time, because the flexible insulation board is flexible, after the extrusion plate is attached to the conveying pipe, the flexible insulation board will deform and fill the gap between the extrusion plate and the conveying pipe, further enhancing the insulation effect. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a perspective view of the extrusion cylinder and heat insulation plate of this utility model;

[0019] Figure 3 This is a cross-sectional view of the extrusion cylinder and the heat insulation plate in this utility model;

[0020] Figure 4 This is a cross-sectional view of the heat insulation plate in this utility model;

[0021] Figure 5 This is a structural diagram of the spring rod and the compression plate;

[0022] In the diagram: 1. Multi-layer co-extrusion molding die body; 11. Feed pipe; 12. Extrusion cylinder; 13. Thumb electric push rod; 14. Connecting plate; 15. Heat insulation plate; 2. Spring rod; 21. Extrusion plate; 3. Guide plate; 4. Roller; 5. Flexible insulation board; 6. Elastic cloth. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 2As shown in the embodiment of this utility model, a multi-layer co-extrusion molding die for mushroom rings includes a multi-layer co-extrusion molding die body 1; a feeding pipe 11 is connected to the side wall of the multi-layer co-extrusion molding die body 1; an extrusion cylinder 12 is connected to the end of the feeding pipe 11; a thumb electric push rod 13 is fixedly connected to the top of the extrusion cylinder 12; a connecting plate 14 is fixedly connected to the top output end of the thumb electric push rod 13; and a heat insulation plate 15 is fixedly connected to the bottom of the connecting plate 14. During operation, the need for temperature isolation can be determined according to the material conveyed by the extrusion cylinder 12. For example, when co-extruding PVC with other materials, the melting temperature of PVC is usually between 160 and 185°C, while materials co-extruded with it, such as PMMA and ASA, may require higher temperatures. Temperature: For example, PMMA is 200–230℃, and ASA is 190–210℃. When materials of different temperatures need to be injected into the multi-layer co-extrusion molding die body 1, the end of the thumb electric push rod 13 is controlled to descend. At this time, the connecting plate 14 and the heat insulation plate 15 descend synchronously. After the descent is completed, the heat insulation plate 15 can block the adjacent feed pipes 11. By providing heat insulation plates 15 between multiple feed pipes 11, when materials of different temperatures are input into the feed pipes 11, the heat insulation plate 15 can reduce the temperature influence between different feed pipes 11, so that the material input into the multi-layer co-extrusion molding die body 1 is at the set temperature, which improves the molding effect of the mushroom ring and reduces the product cracking problem caused by temperature difference outside the set value.

[0025] like Figure 4 As shown, multiple spring rods 2 are fixedly connected to the side wall of the heat insulation plate 15; an extrusion plate 21 is fixedly connected to the end of each spring rod 2; the extrusion plate 21 is arc-shaped; by providing a retractable extrusion plate 21 between the heat insulation plates 15, when the heat insulation plate 15 is isolated between multiple conveying pipes 11, the spring rods 2 are first controlled to retract, and after the spring rods 2 and the conveying pipes 11 are kept horizontal, the pressure on the spring rods 2 is released, so that the spring rods 2 push the extrusion plate 21 towards the conveying pipes 11. At this time, the extrusion plate 21 can wrap around the conveying pipes 11, thereby achieving heat preservation of the conveying pipes 11; by setting the extrusion plate 21, the heat loss problem when there is material conveying inside the conveying pipes 11 can be reduced, and the temperature stability of material conveying can be further improved.

[0026] like Figure 5 As shown, the top and bottom of the extrusion plate 21 are fixedly connected to the guide plate 3; the guide plate 3 is arc-shaped; by providing the guide plate 3 on the extrusion plate 21, when the heat insulation plate 15 moves up and down, the guide plate 3 will first contact the conveying pipe 11. At this time, the arc shape of the guide plate 3 can guide the extrusion plate 21 to move to both sides. During the process of the spring rod 2 moving to the horizontal position with the conveying pipe 11, the extrusion plate 21 can gradually wrap around the conveying pipe 11 to achieve heat preservation of the conveying pipe 11. This setting enables the extrusion plate 21 to automatically adhere to the conveying pipe 11 when the heat insulation plate 15 descends.

[0027] like Figure 5 As shown, a plurality of rollers 4 are rotatably connected to the middle of the guide plate 3; by providing rollers 4 on each of the guide plates 3, when the guide plate 3 is close to the conveying pipe 11, the rollers 4 are spaced between the guide plate 3 and the conveying pipe 11, replacing the sliding friction between the guide plate 3 and the conveying pipe 11 with rolling friction, so as to reduce the wear on the conveying pipe 11.

[0028] like Figure 5 As shown, a flexible insulation board 5 is fixed to the side wall of the extrusion plate 21; the flexible insulation board 5 is disposed on the side of the extrusion plate 21 away from the spring rod 2; by providing a flexible insulation board 5 on the extrusion plate 21, the insulation effect of the extrusion plate 21 on the conveying pipe 11 can be further improved when the extrusion plate 21 is attached to the conveying pipe 11. At the same time, because the flexible insulation board 5 is flexible, after the extrusion plate 21 is attached to the conveying pipe 11, the flexible insulation board 5 fills the gap between the extrusion plate 21 and the conveying pipe 11 through deformation, further improving the insulation effect.

[0029] like Figure 5 As shown, an elastic cloth 6 connects the heat insulation plate 15 and the extrusion plate 21; one end of the elastic cloth 6 is fixed to the side wall of the heat insulation plate 15, and the other end is fixed to the side wall of the extrusion plate 21; the elastic cloth 6 is sleeved on the spring rod 2. By providing the elastic cloth 6 on the spring rod 2, the influence of external dust and impurities on the spring rod 2 can be reduced, and the stability of the extension and contraction of the spring rod 2 can be improved.

[0030] During operation, the need for temperature isolation can be determined based on the material conveyed by the extrusion cylinder 12. For example, when co-extruding PVC with other materials, the melting temperature of PVC is usually 160–185℃, while materials co-extruded with it, such as PMMA and ASA, may require higher temperatures: PMMA 200–230℃ and ASA 190–210℃. When materials of different temperatures need to be injected into the multi-layer co-extrusion molding die body 1, the end of the thumb electric push rod 13 is controlled to descend. At this time, the connecting plate 14 and the heat insulation plate 15 descend synchronously. After the descent is completed, the heat insulation plate 15 can block the material between adjacent feed pipes 11. By providing heat insulation plates 15 between multiple feed pipes 11, when materials of different temperatures are input into the feed pipes 11, the heat insulation plates 15 can reduce the temperature influence between different feed pipes 11, so that the material input into the multi-layer co-extrusion molding die body 1 is at the set temperature, improving the molding effect of the mushroom ring and reducing product cracking caused by temperature differences outside the set value. By providing a retractable extrusion plate 21 between the heat insulation plates 15, when the heat insulation plates 15 are isolated between multiple conveying pipes 11, the spring rod 2 is first controlled to retract. After the spring rod 2 and the conveying pipe 11 are kept horizontal, the pressure on the spring rod 2 is released, so that the spring rod 2 pushes the extrusion plate 21 towards the conveying pipe 11. At this time, the extrusion plate 21 can wrap around the conveying pipe 11, thereby achieving heat preservation of the conveying pipe 11. By setting the extrusion plate 21, the heat loss problem when there is material conveying inside the conveying pipe 11 can be reduced, and the temperature stability of material conveying can be further improved. By providing guide plates 3 on the extrusion plate 21, when the heat insulation plate 15 moves up and down, the guide plates 3 preferentially contact the conveying pipe 11. At this time, the arc shape of the guide plates 3 can guide the extrusion plate 21 to move to both sides. As the spring rod 2 moves to be horizontal with the conveying pipe 11, the extrusion plate 21 can gradually wrap around the conveying pipe 11, thereby achieving heat preservation of the conveying pipe 11. This arrangement ensures that when the heat insulation plate 15 descends, the extrusion plate 21 automatically fits into the conveying pipe 11. By providing rollers 4 on each of the guide plates 3, when the guide plates 3 approach the conveying pipe 11, the rollers 4 are spaced between the guide plates 3 and the conveying pipe 11, replacing the sliding friction between the guide plates 3 and the conveying pipe 11 with rolling friction, thereby reducing wear on the conveying pipe 11. By providing a flexible insulation board 5 on the extrusion plate 21, the insulation effect of the extrusion plate 21 on the conveying pipe 11 is further improved when the extrusion plate 21 is attached to the conveying pipe 11. Simultaneously, because the flexible insulation board 5 is flexible, after the extrusion plate 21 is attached to the conveying pipe 11, the flexible insulation board 5 deforms and fills the gap between the extrusion plate 21 and the conveying pipe 11, further enhancing the insulation effect. By providing an elastic cloth 6 on the spring rod 2, the influence of external dust and impurities on the spring rod 2 can be reduced, improving the stability of the spring rod 2's extension and contraction.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mould for the multilayer co-extrusion of a mushroom sleeve, characterized in that: It includes a multi-layer co-extrusion molding die body (1); the side wall of the multi-layer co-extrusion molding die body (1) is connected to a material conveying pipe (11); the end of the material conveying pipe (11) is connected to an extrusion cylinder (12); a thumb electric push rod (13) is fixedly connected to the top of the extrusion cylinder (12); a connecting plate (14) is fixedly connected to the top output end of the thumb electric push rod (13); and a heat insulation plate (15) is fixedly connected to the bottom of the connecting plate (14).

2. The multi-layer co-extrusion forming mold for mushroom sleeve according to claim 1, characterized in that: The heat insulation plate (15) has multiple spring rods (2) fixedly connected to its side wall; the spring rods (2) have extrusion plates (21) fixedly connected to their ends; the extrusion plates (21) are arc-shaped.

3. The multi-layer co-extrusion forming die for mushroom sleeve according to claim 2, characterized in that: The top and bottom of the extrusion plate (21) are fixedly connected to a guide plate (3); the guide plate (3) is arc-shaped.

4. The multi-layer co-extrusion forming mold for mushroom sleeve according to claim 3, characterized in that: The guide plate (3) is rotatably connected to multiple rollers (4) in the middle.

5. The multi-layer co-extrusion forming mold for mushroom sleeve according to claim 4, characterized in that: A flexible insulation board (5) is fixed to the side wall of the extrusion plate (21); the flexible insulation board (5) is disposed on the side of the extrusion plate (21) away from the spring rod (2).

6. The multi-layer co-extrusion molding die for mushroom rings according to claim 5, characterized in that: An elastic cloth (6) is connected between the heat insulation plate (15) and the extrusion plate (21); one end of the elastic cloth (6) is fixed to the side wall of the heat insulation plate (15), and the other end is fixed to the side wall of the extrusion plate (21); the elastic cloth (6) is sleeved on the spring rod (2).

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