Extrusion die for flame-retardant wire and cable sheath

Abstract

The utility model discloses a flame-retardant wire and cable sheath extrusion die which comprises an extrusion head, a mounting ring is fixedly connected to the position, close to a discharge port, of the surface of the extrusion head, and an upper arc plate and a lower supporting arc plate are arranged at the front end of the mounting ring. The inner wall of the upper arc plate and the inner wall of the lower supporting arc plate make close contact with the surface of the sheath, air guide grooves are formed in the inner wall of the upper arc plate and the inner wall of the lower supporting arc plate, and the two air guide grooves penetrate through the front end and the rear end of the upper arc plate and the front end and the rear end of the lower supporting arc plate correspondingly. The left and right sides of the surfaces of the upper arc plate and the lower supporting arc plate and the left and right sides of the surface of the mounting ring are fixedly connected with side plates and lug plates correspondingly, the side plates make close contact with the lug plates, and fixing assemblies are arranged between the side plates and the lug plates. Through the structure, the heat dissipation efficiency of the extruded wire and cable sheath is supported and improved, and the hidden danger of deformation of the formed sheath is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cable sheath technology, and in particular to a flame-retardant wire and cable sheath extrusion mold. Background Technology

[0002] After extrusion, wire and cable sheaths are usually cooled by a water tank at the front end of the extruder discharge point. However, since the extruded sheath is easily deformed before it is cooled, there is no external support point for the extruded sheath during the distance it travels into the cooling water tank, which poses a risk of deformation due to gravity. Adding external sheath support components would waste time adjusting the height of the support components, and commonly used sheaths do not have additional support measures for the extruded sheath, which affects the practicality of the extrusion die. Utility Model Content

[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a flame-retardant wire and cable sheath extrusion mold that provides additional support for the extruded wire and cable sheath, provides natural heat dissipation and cooling solidification conditions for the sheath, thereby reducing the influence of gravity on the extruded sheath and improving the ease of disassembly and assembly of the additional support components of the mold.

[0004] This utility model also provides an extrusion mold for flame-retardant wire and cable sheaths, comprising: an extrusion head, wherein an installation ring is fixedly connected to the surface of the extrusion head near the discharge port, and the front end of the installation ring is provided with an upper arc plate and a lower supporting arc plate. When producing wire and cable sheaths, the inner walls of the upper arc plate and the lower supporting arc plate are in close contact with the surface of the sheath. The inner walls of the upper arc plate and the lower supporting arc plate are each provided with an air guiding groove, and the two air guiding grooves respectively pass through the front and rear ends of the upper arc plate and the lower supporting arc plate. The left and right sides of the surfaces of the upper arc plate and the lower supporting arc plate are respectively fixedly connected to the left and right sides of the surface of the installation ring, and the side plates are in close contact with the ear plates. A fixing component is provided between the side plates and the ear plates.

[0005] According to the flame-retardant wire and cable sheath extrusion mold of this utility model, air guide pipes are fixedly connected to the surfaces of the upper arc plate and the lower supporting arc plate, and the air guide pipes are interconnected with the air guide grooves. This provides conditions for improving the airflow efficiency on the upper and lower sides of the sheath.

[0006] According to the flame-retardant wire and cable sheath extrusion die of this utility model, the air guide tube is made of high-temperature resistant heat-insulating material, and the air guide tube is inclined in a direction away from the extrusion head outlet. This improves the stability of the air guide tube.

[0007] According to the present invention, a flame-retardant wire and cable sheath extrusion mold includes a fixing component consisting of bolts and nuts, which are arranged vertically opposite each other. This improves the ease of use of the fixing component.

[0008] According to the present invention, in a flame-retardant wire and cable sheath extrusion die, the lower end of the bolt passes through the side plate and the ear plate, and the nut is fixedly connected to the lower surface of the lower side plate. This improves the convenience of maintenance and repair of the fixing components.

[0009] According to the flame-retardant wire and cable sheath extrusion mold of this utility model, both the upper and lower surfaces of the ear plate are provided with receiving grooves, and the part of the side plate that contacts the ear plate is located inside the receiving grooves. This improves the restraining effect of the ear plate on the side plate.

[0010] Beneficial effects:

[0011] Compared with existing technologies, this flame-retardant wire and cable sheath extrusion die provides additional support for the extruded sheath through the installation ring and lower support arc plate, reducing the impact of gravity on the extruded sheath. The upper arc plate and lower support arc plate ensure that both the upper and lower ends of the sheath are wrapped, reducing the risk of uneven cooling at the upper and lower ends of the sheath. The ear plate, side plate, bolts, nuts and storage groove improve the convenience of disassembling and assembling the lower support arc plate and upper arc plate, and improve the convenience of inspecting the additional support components of the die. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0013] Figure 1 This is a top view of the left side of the extrusion die for flame-retardant wire and cable sheaths according to this utility model.

[0014] Figure 2 This is a top view of the right side of the extrusion die for flame-retardant wire and cable sheaths according to this utility model.

[0015] Figure 3 This is a bottom view of the right side of the flame-retardant wire and cable sheath extrusion die of this utility model.

[0016] Figure 4 This utility model relates to an extrusion die for flame-retardant wire and cable sheaths. Figure 3 Enlarged structural diagram at point A in the middle.

[0017] Legend:

[0018] 1. Extrusion head; 2. Mounting ring; 3. Ear plate; 4. Upper arc plate; 5. Side plate; 6. Fixing assembly; 7. Storage groove; 8. Air guide groove; 9. Lower support arc plate; 10. Air guide tube; 11. Bolt; 12. Nut. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] Reference Figure 1-4 This utility model provides a flame-retardant wire and cable sheath extrusion mold, which includes: an extrusion head 1, which is a commonly used wire and cable sheath extrusion mold; a mounting ring 2 is fixedly connected to the surface of the extrusion head 1 near the discharge port; the front end of the mounting ring 2 is provided with an upper arc plate 4 and a lower supporting arc plate 9; during the production of wire and cable sheaths, the inner walls of the upper arc plate 4 and the lower supporting arc plate 9 are in close contact with the surface of the sheath; the lower supporting arc plate 9 is made of high-temperature resistant material and has a smooth inner wall, which is used to provide support for the extruded sheath and reduce the influence of gravity on the extruded sheath; the upper arc plate 4 is used to shield the upper end of the sheath, so that the sheath is in a relatively closed space and reduces the cooling difference between the upper and lower ends of the sheath.

[0021] Both the upper arc plate 4 and the lower supporting arc plate 9 have air guide grooves 8 on their inner walls. The two air guide grooves 8 pass through the front and rear ends of the upper arc plate 4 and the lower supporting arc plate 9, respectively. The air guide grooves 8 improve the heat dissipation efficiency of the upper and lower ends of the sheath and provide simple heat dissipation and solidification conditions for the sheath. The surfaces of the upper arc plate 4 and the lower supporting arc plate 9 are fixedly connected to air guide pipes 10. The air guide pipes 10 and the air guide grooves 8 are interconnected. The air guide pipes 10 are made of high temperature resistant heat insulation material and are inclined away from the discharge port of the extruder head 1. The air guide pipes 10 provide the basic conditions for increasing the air circulation efficiency of the upper and lower ends of the sheath by using external objects. The inclined state of the air guide pipes 10 reduces the risk of lateral air from the air guide pipes 10 entering the extruder through the extruder head 1.

[0022] Side plates 5 and ear plates 3 are fixedly connected to the left and right sides of the surfaces of the upper arc plate 4 and the lower supporting arc plate 9, respectively, and to the left and right sides of the surface of the mounting ring 2. The side plates 5 and ear plates 3 are in close contact and cooperate with each other to fix the upper arc plate 4 and the lower supporting arc plate 9 to the front end of the extrusion head 1. The upper and lower surfaces of the ear plate 3 are provided with receiving grooves 7. The part of the side plate 5 that contacts the ear plate 3 is located inside the receiving groove 7. The receiving groove 7 is used to increase the restraining effect of the ear plate 3 on the side plate 5. A fixing component 6 is provided between the side plate 5 and the ear plate 3. The fixing component 6 consists of bolts 11 and nuts 12. The bolts 11 and nuts 12 are distributed vertically opposite each other. The lower end of the bolt 11 passes through the side plate 5 and the ear plate 3. The nut 12 is fixedly connected to the lower surface of the lower side plate 5. The fixing component 6 is used to integrate the ear plate 3 and the side plate 5, further improving the stability of the upper arc plate 4 and the lower supporting arc plate 9 when they are in action.

[0023] Working principle: The extruder head 1 is installed at the designated position in the extruder. Then, the upper arc plate 4 and the lower supporting arc plate 9 are fixed to the front end of the extruder head 1 using the receiving groove 7 and the fixing component 6. Finally, the external air blowing equipment is connected to the air guide pipe 10 using the conduit. Due to the distance of the air guide pipe 10 from the extruder head 1 and the characteristic of the air guide pipe 10 having a low thermal conductivity point, the impact of high temperature on the conduit is reduced. During the processing of the sheath, the air guide pipe 10 improves the flow efficiency of the sheath heat in the air guide groove 8. At this time, the self-heating efficiency of the sheath increases, thereby simply improving the hardness of the sheath, thereby reducing the impact of gravity on the extruded sheath. Since the end of the air guide pipe 10 is inclined away from the discharge port of the extruder head 1, the risk of the lateral air provided by the air guide pipe 10 entering the extruder through the extruder head 1 is reduced.

[0024] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A flame-retardant wire and cable sheath extrusion die, characterized in that, include: An extrusion head (1) is fixedly connected to an installation ring (2) near the discharge port on the surface of the extrusion head (1). The front end of the installation ring (2) is provided with an upper arc plate (4) and a lower support arc plate (9). When producing wire and cable sheaths, the inner walls of the upper arc plate (4) and the lower support arc plate (9) are in close contact with the sheath surface. The inner walls of the upper arc plate (4) and the lower support arc plate (9) are provided with air guide grooves (8). The two air guide grooves (8) respectively penetrate the front and rear ends of the upper arc plate (4) and the lower support arc plate (9). Side plates (5) and ear plates (3) are fixedly connected to the left and right sides of the surfaces of the upper arc plate (4) and the lower supporting arc plate (9) and the left and right sides of the surface of the mounting ring (2), respectively. The side plates (5) and ear plates (3) are in close contact, and a fixing component (6) is provided between the side plates (5) and ear plates (3).

2. The flame-retardant wire and cable sheath extrusion die according to claim 1, characterized in that, The surfaces of the upper arc plate (4) and the lower supporting arc plate (9) are both fixedly connected with air guide pipes (10), and the air guide pipes (10) and the air guide grooves (8) are interconnected.

3. The flame-retardant wire and cable sheath extrusion die according to claim 2, characterized in that, The air guide tube (10) is made of high temperature resistant heat insulation material, and the air guide tube (10) is inclined in a direction away from the discharge port of the extruder (1).

4. The flame-retardant wire and cable sheath extrusion die according to claim 1, characterized in that, The fixing component (6) consists of bolts (11) and nuts (12), with the bolts (11) and nuts (12) distributed vertically opposite each other.

5. The flame-retardant wire and cable sheath extrusion die according to claim 4, characterized in that, The lower end of the bolt (11) passes through the side plate (5) and the ear plate (3), and the nut (12) is fixedly connected to the lower surface of the lower side plate (5).

6. The flame-retardant wire and cable sheath extrusion die according to claim 1, characterized in that, The ear plate (3) has a storage groove (7) on both its upper and lower surfaces, and the part of the side plate (5) that contacts the ear plate (3) is located inside the storage groove (7).

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