Extrusion die structure for flame retardant material

Abstract

The utility model relates to the production field of flame -retardant material especially relates to a kind of extrusion die head structure of flame -retardant material, including extrusion die head butt joint with discharge port, the extrusion die head includes the die head interface connected in turn, heat preservation component, connecting plate and mounting plate, the extrusion die head is butt joint with discharge port and is mutually conducted, the connecting plate is equipped with guide ring, the mounting plate is equipped with extrusion die plate, multiple extrusion die holes are set up on the extrusion die plate, the extrusion die hole is annular array distribution, the center of the extrusion die plate is provided with cone.The utility model is forced to flow more flame -retardant material to four directions by the cone set in physics to hinder the fast flow of central area, ensure that discharge is uniform, and break the original spiral flow form of flame -retardant material, make it redistribute and integrate around cone, to effectively eliminate "memory effect", lay the foundation for producing the product with smooth surface.

Description

Technical Field

[0001] This utility model relates to the field of flame retardant material production, and in particular to an extrusion die structure for flame retardant materials. Background Technology

[0002] Flame retardant materials are widely used in various industries. The traditional production process of flame retardant materials generally involves mixing the materials first, then extruding and drawing out individual strips of material, and finally cooling and pelletizing them. This method has low production efficiency and generally requires a long cooling line, which takes up a lot of space.

[0003] To improve production efficiency, a new production method has been proposed. Materials are first mixed and melted, then extruded through a screw extruder to an extrusion die. The die can simultaneously extrude multiple strips of material, which are then simultaneously pelletized and cooled. Since flame-retardant materials typically flow directly from a wide channel to a narrow die lip, the flow path is short, resulting in limited mixing and rectification effects. Since the extrusion die needs to extrude multiple strips simultaneously, simple modifications to traditional extrusion dies will struggle to meet quality requirements, particularly in achieving balanced material flow and optimal surface quality of the strips. Therefore, a new extrusion die structure suitable for this new production method is urgently needed. Utility Model Content

[0004] To overcome the above-mentioned shortcomings, this utility model provides an extrusion die structure for flame-retardant materials.

[0005] The technical implementation scheme of this utility model is: an extrusion die structure for flame-retardant materials, comprising an extrusion die connected to a discharge port, characterized in that: the extrusion die includes a die interface, a heat insulation component, a connecting plate, and a mounting plate connected in sequence; the extrusion die is connected to and communicates with the discharge port; a guide ring is provided in the connecting plate; an extrusion template is provided in the mounting plate; multiple extrusion die holes are opened on the extrusion template; the extrusion die holes are distributed in a ring array; a cone is provided at the center of the extrusion template; a material flow channel is formed between the cone and the die interface, the heat insulation component, and the guide ring; and the material flow channel communicates with the discharge port.

[0006] Preferably, the cone comprises a flat-topped cone, a connecting column, and a round cone connected to each other. The flat-topped cone is fixedly installed on the extrusion template and is arranged corresponding to the position of the guide ring. The connecting column is arranged corresponding to the position of the insulation component, and the round cone is arranged corresponding to the position of the die head interface.

[0007] Preferably, the material flow channel is provided with a first channel, a second channel and a third channel from right to left. The first channel is formed by the gap between the extrusion die and the cone, the second channel is formed by the gap between the heat insulation component and the connecting column, and the third channel is formed by the gap between the guide ring and the flat-top cone.

[0008] Preferably, the first channel and the third channel are funnel-shaped, and the second channel is annular.

[0009] Preferably, the edge of the extrusion die is connected to symmetrically distributed fixing members by pins. Each fixing member has an insertion hole on the side away from the hinge end, and a pin is inserted into the insertion hole. The pin is used to lock and close the fixing member.

[0010] Preferably, the fixing member has a groove, and the groove is configured to correspond to the shape of the discharge port and the extrusion die.

[0011] Preferably, the flat-top cone, connecting column, and cone are integrally formed, and the flat-top cone and connecting column, as well as the connecting column and cone, are transitioned by arcs.

[0012] This utility model has the following advantages: 1. This utility model physically hinders the rapid flow in the central area by setting a cone, forcing more flame retardant material to flow to the surrounding areas, ensuring uniform output, and disrupting the original spiral flow pattern of the flame retardant material, causing it to redistribute and integrate around the cone, thereby effectively eliminating the "memory effect" and laying the foundation for producing products with a smooth and flat surface. 2. The flat-top cone, connecting column, and cone are integrally molded. The rounded corners at the joints between the flat-top cone, connecting column, and cone ensure a smooth surface and prevent material from sticking. 3. Because the fixing parts have groove structures that correspond to the shape of the discharge port and the extrusion die, the two fixing parts are closed to fix the interlocking extrusion die head and the discharge port, which can ensure the stability of the connection between the discharge port and the extrusion die. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the discharge port and extrusion die of this utility model.

[0014] Figure 2 This is a three-dimensional structural exploded view of the extrusion die head of this utility model.

[0015] Figure 3 This is a three-dimensional structural diagram of the assembly of the discharge port and the extrusion die head of this utility model.

[0016] Figure 4 This is a three-dimensional structural cross-sectional view of the extrusion die head of this utility model.

[0017] In the attached diagrams: 1-Discharge port, 4-Die head interface, 5-Insulation component, 6-Connecting plate, 7-Mounting plate, 8-Extrusion template, 9-Extrusion die hole, 10-Flat-top cone, 11-Guide ring, 12-Connecting column, 13-Cone, 14-First channel, 15-Second channel, 16-Third channel, 17-Fixing component, 18-Bolt. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Refer to Figures 1-4 An extrusion die structure for flame-retardant material includes an extrusion die connected to an outlet 1. The extrusion die comprises a die interface 4, a heat insulation component 5, a connecting plate 6, and a mounting plate 7 connected in sequence. The heat insulation component 5 provides sufficient heat to the extrusion die, heating it to a suitable temperature. The extrusion die is connected to and communicates with the outlet 1. A guide ring 11 is provided within the connecting plate 6, and an extrusion template 8 is provided within the mounting plate 7. Multiple extrusion die holes 9 are provided on the extrusion template 8 in a ring array. A cone is provided at the center of the extrusion template 8, forming a material flow channel between the cone, the die interface 4, the heat insulation component 5, and the guide ring 11. This material flow channel communicates with the outlet 1. The flame-retardant material is fed into the material flow channel through the extruder screw in the outlet 1, then flows sequentially through a first channel 14, a second channel 15, and a third channel 16, finally being extruded into strips through the extrusion die holes on the extrusion template 8.

[0020] Reference Figure 4The cone comprises a flat-topped cone 10, a connecting column 12, and a cylindrical cone 13 connected to each other. The flat-topped cone 10 is fixedly installed on the extrusion template 8 and is positioned corresponding to the guide ring 11. The connecting column 12 is positioned corresponding to the insulation component 5, and the cylindrical cone 13 is positioned corresponding to the die head interface 4. By setting the cone, the rapid flow in the central area is physically hindered, forcing more flame-retardant material to flow outwards, ensuring uniform output. It also disrupts the original spiral flow pattern of the flame-retardant material, causing it to redistribute and integrate around the cone, thereby effectively eliminating the "memory effect" and laying the foundation for producing a smooth and flat product. The flat-topped cone 10 and the cylindrical cone 13 are integrally molded. The flat-topped cone 10 and the connecting column 12, as well as the connecting column 12 and the cylindrical cone 13, are transitioned by rounded arcs to ensure a smooth surface and prevent flame-retardant material from adhering to the surface.

[0021] Reference Figure 4 The material flow channel is provided with a first channel 14, a second channel 15 and a third channel 16 from right to left. The first channel 14 is formed by the gap between the extrusion die head and the cone 13. The second channel 15 is formed by the gap between the heat insulation component 5 and the connecting column 12. The third channel 16 is formed by the gap between the guide ring 11 and the flat-top cone 10. The first channel 14 and the third channel 16 are funnel-shaped. The first channel 14 is used to disperse and integrate the flame retardant material and promote the homogenization of the flame retardant material. The third channel 16 is used to guide the flame retardant material to flow to the extrusion die hole 9. The second channel 15 is annular.

[0022] Reference Figures 1-3 The edge of the extrusion die head is connected to symmetrically distributed fixing members 17 by pins. Each fixing member 17 has an insertion hole on the side away from the hinge end, and a pin inserted into the insertion hole. The pin is used to lock and close the fixing member 17. The fixing member 17 has a groove, which is configured to correspond to the shape of the discharge port 1 and the extrusion die. The fixing member 17 fixes the discharge port 1 and the extrusion die head, ensuring the stability of the connection between the discharge port 1 and the extrusion die.

[0023] Working principle: The extrusion die is connected to the discharge port 1, allowing the material flow channel and discharge port 1 to communicate with each other. Two fixing parts 17 are then closed to secure the connected extrusion die and discharge port 1, and locked by pins. The flame-retardant material is fed into the material flow channel of the extrusion die through the extruder screw in discharge port 1. The flame-retardant material flows sequentially through the first channel 14, the second channel 15, and the third channel 16, and finally is extruded into strips through the extrusion die orifice on the extrusion plate 8. Because the molten flame-retardant material is pushed into the die flow channel from the extruder screw, the flow velocity in the center is much higher than near the die wall. This uneven flow can lead to uneven extrusion. The cone physically hinders the rapid flow in the central area, forcing more flame-retardant material to flow outwards, ensuring uniform extrusion. Furthermore, the flame-retardant material undergoes intense shearing and mixing in the extruder screw. The material retains a "memory" of spiral flow within its interior. If it directly enters a flat, straight channel, this spiral flow pattern may not be completely eliminated, resulting in flow channel marks on the product surface. The cone disrupts the original spiral flow pattern of the flame-retardant material, causing it to redistribute and integrate around the cone, effectively eliminating the "memory effect" and laying the foundation for producing a smooth and flat product. Simultaneously, the flat-top cone 10, connecting column 12, and cone 13 are integrally molded. The rounded transitions between the flat-top cone 10 and connecting column 12, and between the connecting column 12 and cone 13, ensure a smooth surface and prevent material adhesion. When the flame-retardant material flows through the second channel 15, formed by the gap between the insulation component 5 and the connecting column 12, the insulation component 5 ensures temperature stability. When it flows through the third channel 16, formed by the gap between the guide ring 11 and the flat-top cone 10, the third channel 16 guides the material towards the extrusion die 9, ensuring stable extrusion of the flame-retardant material through the extrusion die 9.

[0024] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. An extrusion die structure for a flame-retardant material, comprising an outlet (1) connected to an extrusion die, characterized in that: The extrusion die includes a die interface (4), a heat insulation component (5), a connecting plate (6), and a mounting plate (7) connected in sequence. The extrusion die is connected to the discharge port (1) and communicates with each other. The connecting plate (6) is provided with a guide ring (11), and the mounting plate (7) is provided with an extrusion template (8). The extrusion template (8) is provided with multiple extrusion die holes (9). The extrusion die holes (9) are distributed in a ring array. A cone is provided at the center of the extrusion template (8). A material flow channel is formed between the cone and the die interface (4), the heat insulation component (5), and the guide ring (11). The material flow channel is connected to the discharge port (1).

2. The extrusion die structure for a flame-retardant material according to claim 1, characterized in that: The cone includes a flat-top cone (10), a connecting column (12), and a round cone (13) connected to each other. The flat-top cone (10) is fixedly installed on the extrusion template (8) and is arranged corresponding to the position of the guide ring (11). The connecting column (12) is arranged corresponding to the position of the heat insulation component (5). The round cone (13) is arranged corresponding to the position of the die head interface (4).

3. The extrusion die structure for a flame-retardant material according to claim 2, characterized in that: The material flow channel is provided with a first channel (14), a second channel (15) and a third channel (16) from right to left. The first channel (14) is the gap between the extrusion die and the cone (13). The second channel (15) is the gap between the heat insulation component (5) and the connecting column (12). The third channel (16) is the gap between the guide ring (11) and the flat-top cone (10).

4. The extrusion die structure for a flame-retardant material according to claim 3, characterized in that: The first channel (14) and the third channel (16) are funnel-shaped, and the second channel (15) is annular.

5. The extrusion die structure for a flame-retardant material according to claim 1, characterized in that: The edge of the extrusion die is connected to symmetrically distributed fasteners (17) by a pin. Each fastener (17) has an insertion hole on the side away from the hinge end, and a pin is inserted into the insertion hole. The pin is used to lock and close the fastener (17).

6. The extrusion die structure for a flame-retardant material according to claim 5, characterized in that: The fixing member (17) has a groove, which is configured to correspond to the shape of the discharge port (1) and the extrusion die.

7. The extrusion die structure for a flame-retardant material according to claim 2, characterized in that: The flat-top cone (10) and the cone (13) are integrally formed, and the flat-top cone (10) and the connecting column (12) and the connecting column (12) and the cone (13) are both transitioned by arcs.

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