Polyethylene foamed extrusion die

Abstract

This utility model discloses a polyethylene foaming extrusion die, belonging to the field of extrusion dies. It includes a die body, with a feed connector at one end and an extrusion head at the other end. The feed connector has a feed channel inside, and the die body has an extrusion conveying channel. A heating component is provided on the feed connector. The heating component heats and maintains the temperature of the molten material in the feed channel, while also providing insulation to prevent heat loss. The molten material undergoes relative movement under the action of a spiral guide plate, improving heating uniformity. A limiting sleeve facilitates quick installation and removal of the heating coil. A cooling component, with a dispersing head to disperse the molten material, works in conjunction with a cooling chamber, air inlet pipe, and air outlet pipe to cool and lower the temperature of the molten material. This ensures that the material temperature is reduced while extruding and molding, eliminating the need for a separate cooling mechanism to complete the molding process.

Description

Technical Field

[0001] This utility model relates to the field of extrusion dies, and in particular to a polyethylene foaming extrusion die. Background Technology

[0002] Polyethylene foaming refers to the processing of polyethylene materials using a foaming method to produce the desired foam products. The polyethylene foaming process requires a foaming machine, in which the extrusion die (extrusion head) is the core molding component. Its role is crucial in key stages such as the uniform distribution of the plastic melt, stable extrusion, control of the cell structure, and final product shaping.

[0003] In existing foaming extrusion dies, molten material enters the die through the feed channel, is heated by the heating element at the front end, and then smoothly conveyed before being extruded through the extrusion orifice. However, the heating element in existing foaming extrusion dies uses resistance wire, which, while providing good heating, lacks insulation, leading to significant heat loss and affecting heating efficiency. Furthermore, the poor flowability of the molten material during feed results in uneven heating. Additionally, the absence of a cooling structure at the extrusion orifice in existing foaming extrusion dies makes the high-temperature extruded molten material prone to deformation, requiring a separate cooling system, increasing floor space and operating costs. Utility Model Content

[0004] The main objective of this invention is to provide a polyethylene foaming extrusion die head that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A polyethylene foaming extrusion die includes a die body, one end of which is provided with a feed connector and the other end of which is provided with an extrusion head. The feed connector has a feed channel inside, and the die body has an extrusion conveying channel inside. The feed connector is provided with a heating component, and a filter frame is provided at the part where the feed connector is connected to the die body. The die body has a cooling component inside, and one end of the cooling component is located in the extrusion head.

[0007] Preferably, the end of the die head body is provided with a first flange, the feed connector is provided with a second flange, and the second flange is fixedly connected to the first flange by bolts.

[0008] Preferably, the extrusion head is provided with a connecting end, and the connecting end is fixedly connected to the die head body by mounting screws, and the extrusion head is provided with an extrusion hole.

[0009] Preferably, the heating assembly includes a spiral guide plate, a heating coil, a resistance wire, a heat insulation cavity, and a limiting sleeve. The spiral guide plate is fixed in the feeding channel on the feeding connector, and the spiral guide plate is arranged in a ring array in the feeding channel. The heating coil is sleeved on the feeding connector. The resistance wire is fixed on the heating coil, and both ends of the resistance wire are located outside the heating coil. The heat insulation cavity is opened on the heating coil. The limiting sleeve is sleeved on the feeding connector, and the limiting sleeve is provided with a locking screw.

[0010] Preferably, the cooling assembly includes a dispersing head, a cooling chamber, a first connector, an air inlet pipe, a second connector, an air outlet pipe, and a baffle plate. The cooling chamber is located on the dispersing head, and the dispersing head is installed inside the die head body. The first connector and the second connector are fixed on the dispersing head. The air inlet pipe and the air outlet pipe are located on the die head body, and the ends of the air inlet pipe and the air outlet pipe are respectively connected to the first connector and the second connector. The baffle plate is fixed in the cooling chamber on the dispersing head.

[0011] Compared with the prior art, this utility model has the following beneficial effects: This polyethylene foaming extrusion die head, through the setting of heating components, has a spiral guide plate set inside the feeding channel, and a resistance wire and heat insulation cavity set in the heating coil to heat and keep the molten material in the feeding channel at a certain temperature. At the same time, it can also insulate during heating to avoid heat loss and improve the heating effect. The molten material generates relative movement under the action of the spiral guide plate, which can improve the heating uniformity. The use of a limiting sleeve facilitates quick installation and disassembly of the heating coil, making operation highly convenient. By setting a cooling component, a dispersing head is used to disperse the molten material. In conjunction with the cooling cavity, air inlet pipe and air outlet pipe, the molten material can be cooled and cooled down. This ensures that the material temperature is reduced while extruding and molding, and molding can be completed without setting up a separate cooling mechanism, thus reducing the cost of use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the heating assembly of this utility model;

[0015] Figure 4 This is a schematic diagram of the cooling component of this utility model.

[0016] In the diagram: 1. Die head body; 2. Feed connector; 3. Feed channel; 4. Extrusion conveying channel; 5. Heating assembly; 501. Spiral guide plate; 502. Heating coil; 503. Resistance wire; 504. Heat insulation cavity; 505. Limiting sleeve; 6. Filter frame; 7. Extruder head; 8. Cooling assembly; 801. Dispersing head; 802. Cooling cavity; 803. First connector; 804. Air inlet pipe; 805. Second connector; 806. Air outlet pipe; 807. Baffle plate; 9. First flange; 10. Second flange; 11. Connecting end; 12. Extrusion hole. Detailed Implementation

[0017] 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.

[0018] like Figures 1-4 As shown, a polyethylene foaming extrusion die includes a die body 1, with a feed connector 2 at one end and an extrusion head 7 at the other end. The feed connector 2 has a feed channel 3 inside, and an extrusion conveying channel 4 inside the die body 1. A heating component 5 is provided on the feed connector 2, and a filter frame 6 is provided at the connection between the feed connector 2 and the die body 1. A cooling component 8 is provided inside the die body 1, with one end of the cooling component 8 located in the extrusion head 7. A first flange 9 is provided at the end of the die body 1, and a second flange 10 is provided on the feed connector 2, with the second flange 10 and the first flange 9 fixedly connected by bolts. A connecting end 11 is fitted over the extrusion head 7 and fixedly connected to the die body 1 by mounting screws. The extrusion head 7 has an extrusion hole 12.

[0019] During the foaming process of polyethylene, the extrusion die is installed on the foaming machine. The molten material flows in the feed channel 3 on the feed connector 2. The heating component 5 continues to heat and keep the molten material warm to prevent it from cooling and affecting the extrusion and conveying effect. The molten material passes through the filter frame 6 and enters the extrusion conveying channel 4 on the die body 1. After being cooled by the cooling component 8, it enters the extrusion hole 12 on the extrusion head 7 and is finally extruded into shape. If it is necessary to disassemble and replace the corresponding structure, the die body 1 and the feed connector 2 can be disassembled through the first flange 9 and the second flange 10. The filter frame 6 can be replaced, and the extrusion head 7 can be replaced after disassembling the connecting end 11. The structure is simple and the operation is convenient and quick.

[0020] According to the above implementation scheme, the heating component 5 includes a spiral guide plate 501, a heating coil 502, a resistance wire 503, a heat insulation cavity 504, and a limiting sleeve 505. The spiral guide plate 501 is fixed in the feeding channel 3 on the feeding connector 2, and the spiral guide plate 501 is arranged in a ring array in the feeding channel 3. The heating coil 502 is sleeved on the feeding connector 2. The resistance wire 503 is fixed on the heating coil 502, and both ends of the resistance wire 503 are located outside the heating coil 502. The heat insulation cavity 504 is opened on the heating coil 502. The limiting sleeve 505 is sleeved on the feeding connector 2, and the limiting sleeve 505 is provided with a locking screw.

[0021] When installing the heating assembly 5, the spiral guide plate 501 is directly placed in the feed channel 3, and the heating coil 502 with the resistance wire 503 is sleeved on the feed connector 2. The limiting sleeve 505 is placed on the feed connector 2 to limit and fix the heating coil 502. The limiting sleeve 505 is then fixed with a tightening screw. During use, the resistance wire 503 generates heat after being energized. This heat is applied to the feed channel 3 to heat and maintain the temperature of the molten material. The molten material conveyed in the feed channel 3 rotates and flows under the action of the spiral guide plate 501, which can improve the heating uniformity. The heat insulation cavity 504 prevents a large amount of heat generated by the resistance wire 503 from being lost, thus increasing the heating and heat preservation effect. After being heated and kept warm, the molten material continues to be extruded and conveyed, and finally extruded into shape.

[0022] According to the above implementation scheme, the cooling assembly 8 includes a dispersing head 801, a cooling chamber 802, a first connector 803, an air inlet pipe 804, a second connector 805, an air outlet pipe 806, and a baffle plate 807. The cooling chamber 802 is opened on the dispersing head 801, and the dispersing head 801 is installed inside the mold head body 1. The first connector 803 and the second connector 805 are fixed on the dispersing head 801. The air inlet pipe 804 and the air outlet pipe 806 are arranged on the mold head body 1, and the ends of the air inlet pipe 804 and the air outlet pipe 806 are respectively connected to the first connector 803 and the second connector 805. The baffle plate 807 is fixed in the cooling chamber 802 on the dispersing head 801.

[0023] When the cooling assembly 8 is in use, the dispersing head 801 evenly disperses and compresses the molten material, increasing the conveying pressure. The cold air enters the cooling chamber 802 through the air inlet pipe 804 and the first connector 803. After passing through the baffle plate 807, it is discharged from the air outlet pipe 806 at the second connector 805. The cold air in the cooling chamber 802 cools the molten material in the extrusion hole 12. During the heat exchange process, the molten material can be initially cooled before extrusion molding, ensuring subsequent rapid cooling and molding.

[0024] It should be noted that the heating component 5, with a spiral guide plate 501 inside the feed channel 3 and a resistance wire 503 and a heat insulation cavity 504 inside the heating coil 502, heats and keeps the molten material in the feed channel 3 at a constant temperature. Simultaneously, it provides insulation during heating to prevent heat loss and improves the heating effect. The molten material undergoes relative motion under the action of the spiral guide plate 501, which improves heating uniformity. The use of a limiting sleeve 505 facilitates quick installation and removal of the heating coil 502, resulting in high operational convenience. The cooling component 8, with a dispersing head 801 used to disperse the molten material, works in conjunction with the cooling cavity 802, air inlet pipe 804, and air outlet pipe 806 to cool and reduce the temperature of the molten material. This ensures that the material temperature is lowered while extruding and molding, eliminating the need for a separate cooling mechanism and reducing operating costs.

[0025] The foregoing describes the working principle, features, and beneficial effects of this utility model. Those skilled in the art will understand from the foregoing that it does not limit the utility model. The embodiments and description above illustrate the basic principles and features of this utility model. Various changes and improvements can be made to this utility model while remaining consistent with its concept, and all such improvements should fall within the scope of protection claimed by this utility model.

Claims

1. A polyethylene foaming extrusion die, comprising a die body (1), one end of the die body (1) being provided with a feed connector (2), and the other end of the die body (1) being provided with an extrusion head (7), the feed connector (2) having a feed channel (3) inside, and the die body (1) having an extrusion conveying channel (4), characterized in that: The feed connector (2) is provided with a heating component (5), and a filter frame (6) is provided at the part where the feed connector (2) is connected to the die head body (1). The die head body (1) is provided with a cooling component (8), and one end of the cooling component (8) is located in the extrusion head (7).

2. The polyethylene foaming extrusion die head according to claim 1, characterized in that: The end of the die head body (1) is provided with a first flange (9), and the feed connector (2) is provided with a second flange (10), and the second flange (10) and the first flange (9) are fixedly connected by bolts.

3. The polyethylene foaming extrusion die head according to claim 2, characterized in that: The extrusion head (7) is fitted with a connecting end (11), and the connecting end (11) is fixedly connected to the die head body (1) by mounting screws. The extrusion head (7) is provided with an extrusion hole (12).

4. A polyethylene foaming extrusion die according to claim 3, characterized in that: The heating assembly (5) includes a spiral guide plate (501), a heating coil (502), a resistance wire (503), a heat insulation cavity (504), and a limiting sleeve (505). The spiral guide plate (501) is fixed in the feeding channel (3) on the feeding connector (2), and the spiral guide plate (501) is arranged in a ring array in the feeding channel (3). The heating coil (502) is sleeved on the feeding connector (2). The resistance wire (503) is fixed on the heating coil (502), and both ends of the resistance wire (503) are located outside the heating coil (502). The heat insulation cavity (504) is opened on the heating coil (502). The limiting sleeve (505) is sleeved on the feeding connector (2), and the limiting sleeve (505) is provided with a clamping screw.

5. A polyethylene foaming extrusion die according to claim 4, characterized in that: The cooling assembly (8) includes a dispersing head (801), a cooling chamber (802), a first connector (803), an air inlet pipe (804), a second connector (805), an air outlet pipe (806), and a baffle plate (807). The cooling chamber (802) is opened on the dispersing head (801), and the dispersing head (801) is installed inside the mold head body (1). The first connector (803) and the second connector (805) are fixed on the dispersing head (801). The air inlet pipe (804) and the air outlet pipe (806) are arranged on the mold head body (1), and the ends of the air inlet pipe (804) and the air outlet pipe (806) are respectively connected to the first connector (803) and the second connector (805). The baffle plate (807) is fixed in the cooling chamber (802) on the dispersing head (801).

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