Uniform extrusion die for cable insulation layer

Abstract

The utility model relates to the technical field of cable insulation layer preparation dies, in particular to a cable insulation layer uniform extrusion die which comprises a melting spiral feeding cylinder, a reducing cylinder fixedly installed at the front end of the melting spiral feeding cylinder, an extrusion die pipe fixedly installed at the front end of the reducing cylinder, a water passing cylinder fixedly installed on the outer side of the extrusion die pipe, and a water outlet pipe fixedly installed on the outer side of the water passing cylinder. A plurality of partition plates are fixedly installed in the water passing cylinder, a water storage cavity is formed between every two adjacent partition plates, upper water passing holes are formed between the partition plates and the inner top wall of the water passing cylinder, every two adjacent water storage cavities are communicated through the corresponding upper water passing holes, and a water inlet pipe is fixedly installed on the outer bottom side of the front end of the water passing cylinder. And a water outlet pipe is fixedly installed on the outer top side of the rear end of the water passing barrel, two heat preservation covers are arranged on the outer side between the melting spiral feeding barrel and the extrusion mold pipe, and electric heating rods are fixedly installed on the inner walls of the heat preservation covers. Through the arrangement of the heat preservation cover, the cooling forming operation is gradually carried out, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of cable insulation layer preparation molds, and specifically to a uniform extrusion mold for cable insulation layers. Background Technique

[0002] As an indispensable important part of modern power and communication systems, the quality of the insulation layer of a cable directly affects the service life, safety and reliability of the cable. The insulation layer refers to a layer of insulating material wrapped outside the cable. During the production process of the cable, the extrusion of the insulation layer is a key process, and its uniformity directly affects the overall performance of the cable.

[0003] Currently, when performing the preparation operation of the cable insulation layer, it is all completed by extrusion. When performing the extrusion operation, it is usually carried out on a corresponding extruder. A corresponding extrusion mold is provided on this type of extruder. As the raw material is extruded outwards along the extrusion mold and cooled, the extrusion preparation operation of the cable insulation layer is completed. The extrusion molds used in the market all have the advantage of being able to uniformly extrude the molten raw material outwards; however, when this type of uniform extrusion mold is in use, there is a lack of components that can gradually cool down on it, and the gradual cooling operation cannot be achieved, which will cause the cable insulation layer to be difficult to maintain its shape after extrusion and is prone to deformation. There are also some extrusion molds that use rapid cooling for heat dissipation, and the temperature difference of rapid cooling is relatively large, which is likely to affect the performance of the cable insulation layer. In view of this, we have proposed a uniform extrusion mold for cable insulation layers. Content of the Utility Model

[0004] The purpose of the present utility model is to provide a uniform extrusion mold for cable insulation layers to solve the defects mentioned in the above background technique.

[0005] To achieve the above purpose, the present utility model provides the following technical solution:

[0006] A uniform extrusion mold for cable insulation layers includes a molten spiral feeding cylinder. A variable diameter cylinder is fixedly installed at the front end of the molten spiral feeding cylinder. An extrusion mold tube is fixedly installed at the front end of the variable diameter cylinder. A water passing cylinder is fixedly installed on the outer side of the extrusion mold tube. A plurality of partitions arranged linearly and equidistantly are fixedly installed inside the water passing cylinder. The extrusion mold tube penetrates through a plurality of partitions from the rear end of the water passing cylinder to the outside of the front end of the water passing cylinder. A water storage chamber is arranged between every two adjacent partitions. One end of the partition is fixedly connected to the inner bottom wall of the water passing cylinder, and an upper water passing hole is arranged between the other end of the partition and the inner top wall of the water passing cylinder. Every two adjacent water storage chambers are connected through the upper water passing hole. A water inlet pipe is fixedly installed on the outer bottom side of the front end of the water passing cylinder, and a water outlet pipe is fixedly installed on the outer top side of the rear end of the water passing cylinder.

[0007] Preferably, a plurality of drain pipes arranged at equal intervals are provided on the outer bottom side of the water passing cylinder, and the plurality of drain pipes are respectively communicated with the corresponding water storage chambers, and valves are fixedly installed on the drain pipes.

[0008] Preferably, the reducing cylinder is in a funnel shape, and the size of the extrusion die tube is adapted to the size of the cable insulating layer.

[0009] Preferably, two symmetrically arranged front and rear heat preservation covers are provided on the outer side between the molten spiral feeding cylinder and the extrusion die tube, and electric heating rods are fixedly installed on the inner wall of the heat preservation cover.

[0010] Preferably, a heat preservation layer is provided on the outer surface of the heat preservation cover for heat preservation operation.

[0011] Preferably, side plates are fixedly installed at the side parts of the two heat preservation covers close to each other, and the two side plates are connected by a plurality of fastening bolts.

[0012] Preferably, the water passing cylinder is located at the discharging end of the extrusion die tube for cooling the discharging end.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By means of components such as the water passing cylinder provided in the present utility model, it is ensured that water can enter through the water inlet pipe and flow out through the water outlet pipe, and through the partition plate provided for separation operation, water can sequentially enter multiple water storage chambers from front to back, achieving the effect of cooling step by step from front to back. Gradual cooling can ensure that the extruded molten raw material is cooled more evenly, which is beneficial to the uniform extrusion operation of the cable insulating layer.

[0015] 2. By means of the heat preservation cover and the electric heating rod provided in the present utility model, heating and melting operations can be carried out on the raw materials in the molten spiral feeding cylinder before they are cooled, avoiding the direct cooling and solidification of the raw materials and affecting their normal extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the exploded structural schematic diagram of the present utility model;

[0018] Figure 3 is the partial structural schematic diagram of the present utility model;

[0019] Figure 4 is the cross-sectional view of the water passing cylinder of the present utility model.

[0020] The meanings of the various reference numerals in the figure are as follows:

[0021] 1. Melting spiral feeding cylinder; 10. Reducing cylinder; 11. Extrusion die tube

[0022] 2. Heat preservation cover; 20. Electric heating rod; 21. Heat preservation layer; 22. Side plate

[0023] 3. Water passing cylinder; 30. Partition board; 31. Water storage chamber; 32. Upper water passing hole; 33. Water inlet pipe; 34. Water outlet pipe; 35. Drain pipe; 36. Valve Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 - 4 , the present invention provides a technical solution: a cable insulation layer uniform extrusion die, including a melting spiral feeding cylinder 1, a reducing cylinder 10 is fixedly installed at the front end of the melting spiral feeding cylinder 1, an extrusion die tube 11 is fixedly installed at the front end of the reducing cylinder 10, the reducing cylinder 10 is in a funnel shape, and the size of the extrusion die tube 11 is adapted to the size of the cable insulation layer, so that the amount and pressure of the molten material in the extrusion die tube 11 are sufficient, which is beneficial to ensuring that the extruded cable insulation layer is more uniform.

[0026] Specifically, a water passing cylinder 3 is fixedly installed outside the extrusion die tube 11, a plurality of partition boards 30 arranged linearly at equal intervals are fixedly installed inside the water passing cylinder 3, the extrusion die tube 11 penetrates through a plurality of partition boards 30 from the rear end of the water passing cylinder 3 to the outside of the front end of the water passing cylinder 3, a water storage chamber 31 is arranged between adjacent two partition boards 30, one end of the partition board 30 is fixedly connected to the inner bottom wall of the water passing cylinder 3, and an upper water passing hole 32 is arranged between the other end of the partition board 30 and the inner top wall of the water passing cylinder 3. Adjacent two water storage chambers 31 are communicated with each other through the upper water passing hole 32. A water inlet pipe 33 is fixedly installed on the outer bottom side of the front end of the water passing cylinder 3, and a water outlet pipe 34 is fixedly installed on the outer top side of the rear end of the water passing cylinder 3, so that the outside cold water can perform water transportation operations in sequence from front to back. At this time, the water temperature in the water passing cylinder 3 rises sequentially from front to back, so as to achieve the effect of gradually cooling.

[0027] In this embodiment, a plurality of drain pipes 35 arranged at equal intervals are arranged on the outer bottom side of the water passing cylinder 3, the plurality of drain pipes 35 are respectively communicated with the corresponding water storage chambers 31, and a valve 36 is fixedly installed on the drain pipe 35, which is convenient for draining the water in the drain pipe 35 to the outside after the preparation is completed by opening the valve 36.

[0028] Specifically, there are two symmetrically arranged front and rear thermal insulation covers 2 on the outside between the melting spiral feeding cylinder 1 and the extrusion die tube 11. Electric heating rods 20 are fixedly installed on the inner wall of the thermal insulation cover 2, so as to facilitate heating for heat preservation and melting operation of raw materials.

[0029] Furthermore, a thermal insulation layer 21 is arranged on the outer surface of the thermal insulation cover 2 for heat preservation operation.

[0030] In addition, side plates 22 are fixedly installed at the side parts where the two thermal insulation covers 2 are close to each other. The two side plates 22 are connected by a plurality of fastening bolts, which is convenient for fixed installation operation.

[0031] It is worth noting that the water passing cylinder 3 is located near the discharging end of the extrusion die tube 11 and is used for cooling the discharging end.

[0032] When the cable insulation layer uniform extrusion die of the present utility model is in use, the electric heating rods 20 are connected to an external power supply and made to work. When the electric heating rods 20 work, the raw materials in the melting spiral feeding cylinder 1, the reducing cylinder 10 and the extrusion die tube 11 start to be melted and heat-preserved. In addition, as the spiral blades arranged in the melting spiral feeding cylinder 1 work, after the molten raw materials are conveyed outwards, the raw materials are extruded out from the extrusion die tube 11 part to complete the extrusion molding operation. In addition, the water inlet pipe 33 is connected to an external cold water inlet pipe, and the water outlet pipe 34 is connected to an external water discharge pipe. As the cold water enters, it can sequentially enter the water storage chamber 31 from front to back, realizing the cooling operation from front to back in sequence, and realizing the step-by-step cooling and forming of the molten raw materials.

[0033] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and do not limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A cable insulation layer uniform extrusion die, comprising a molten spiral feeding cylinder (1), characterized in that: A reducing cylinder (10) is fixedly installed at the front end of the molten spiral feeding cylinder (1). An extrusion die tube (11) is fixedly installed at the front end of the reducing cylinder (10). A water passing cylinder (3) is fixedly installed on the outer side of the extrusion die tube (11). A plurality of partitions (30) arranged linearly and at equal intervals are fixedly installed inside the water passing cylinder (3). The extrusion die tube (11) penetrates through a plurality of partitions (30) from the rear end of the water passing cylinder (3) and extends to the outer side of the front end of the water passing cylinder (3). A water storage chamber (31) is arranged between two adjacent partitions (30). One end of the partition (30) is fixedly connected to the inner bottom wall of the water passing cylinder (3), and an upper water passing hole (32) is arranged between the other end of the partition (30) and the inner top wall of the water passing cylinder (3). Two adjacent water storage chambers (31) are communicated with each other through the upper water passing hole (32). A water inlet pipe (33) is fixedly installed on the outer bottom side of the front end of the water passing cylinder (3), and a water outlet pipe (34) is fixedly installed on the outer top side of the rear end of the water passing cylinder (3).

2. The uniform extrusion die for cable insulation layer according to claim 1, wherein: A plurality of drain pipes (35) arranged at equal intervals are arranged on the outer bottom side of the water passing cylinder (3). The plurality of drain pipes (35) are respectively communicated with the corresponding water storage chambers (31). A valve (36) is fixedly installed on the drain pipe (35).

3. The uniform extrusion die for cable insulation layer according to claim 1, characterized in that: The reducing cylinder (10) is in a funnel shape, and the size of the extrusion die tube (11) is adapted to the size of the cable insulation layer.

4. The uniform extrusion die for cable insulation layer according to claim 1, wherein: Two symmetrical front and rear heat insulation covers (2) are arranged on the outer side between the molten spiral feeding cylinder (1) and the extrusion die tube (11). Electric heating rods (20) are fixedly installed on the inner wall of the heat insulation cover (2).

5. The cable insulation layer uniform extrusion die according to claim 4, characterized in that: A heat insulation layer (21) is arranged on the outer surface of the heat insulation cover (2).

6. The cable insulation layer uniform extrusion die according to claim 5, characterized in that: Side plates (22) are fixedly installed at the side parts of the two heat insulation covers (2) close to each other. The two side plates (22) are connected by a plurality of fastening bolts.

7. The uniform extrusion die for cable insulation layer according to claim 1, characterized in that: The water passing cylinder (3) is located at the discharging end of the extrusion die tube (11) and is used for cooling the discharging end.

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