Heating device of cable extruder

Abstract

The utility model relates to the technical field of wire and cable manufacturing, in particular to a heating device of a cable extruder, which comprises an extrusion cylinder, a far infrared heating block and a cooling coil, the far infrared heating block is wrapped on the extrusion cylinder and is used for heating the extrusion cylinder; the cooling coil is arranged between the far infrared heating block and the extrusion cylinder, is wound on the extrusion cylinder and is used for selectively cooling the extrusion cylinder; according to the cable extruder heating device provided by the utility model, the far infrared heating block is used for heating the extrusion cylinder, and when the heating temperature is higher, the cooling coil is used for cooling the extrusion cylinder, so that the heating temperature is convenient to control, the extrusion quality is improved, and the cable extruder heating device is suitable for extruding cable materials with higher temperature requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of wire and cable manufacturing, in particular to a heating device for a cable extruder. Background Art

[0002] During the production of wires and cables, the high-speed operation of the extruder generates a large amount of frictional heat and shear heat, which will destroy the thermal balance and cause the temperature to rise very high, exceeding the process temperature, which has a great impact on product quality and may even cause the production to be unable to proceed normally. This requires effective temperature control.

[0003] The utility model with the publication (announcement) number CN205485678U discloses a temperature control system for a cable extruder, wherein the outer ring of the working cylinder of the cable extruder is provided with several coaxially arranged cast aluminum heaters, and the cast aluminum heater is provided with a heating layer, an intermediate hollow layer, and an installation layer from the inside to the outside; a circulation pipeline is provided on the cable extruder, and the circulation pipeline consists of a cooling medium input pipeline and a cooling medium loop, and an array of double-wire spiral tubes is connected to the cooling medium input pipeline, and the array of double-wire spiral tubes are all located in the intermediate hollow layer of the cast aluminum heater. The outer ring of the array of double-wire spiral tubes is provided with an installation layer of the cast aluminum heater, and the double-wire spiral tube is connected to a measuring point of a temperature measuring element at the outer ring of the protruding end of the cast aluminum heater, and the other measuring point of the temperature measuring element is set in the heating layer of the cast aluminum heater; the proportional control valve and the heating layer of the cast aluminum heater are both connected to the PLC controller.

[0004] As in the above technical solution, existing cable extruders often use cast aluminum heating blocks to heat the barrel screw during the production process. This heating method is not convenient for controlling the heating temperature. When extruding some cable materials with higher temperature requirements, the temperature often exceeds the limit, resulting in poor cable extrusion quality. Utility Model Content

[0005] In view of this, the utility model proposes a cable extruder heating device, which heats the extrusion barrel through a far-infrared heating block, and when the heating temperature is high, cools the extrusion barrel through a cooling coil, which facilitates the control of the heating temperature and improves the extrusion quality. It is suitable for the extrusion of cable materials with higher temperature requirements.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] The utility model provides a cable extruder heating device, comprising an extrusion barrel, a far-infrared heating block and a cooling coil, wherein:

[0008] The far-infrared heating block is wrapped around the extrusion cylinder to heat the extrusion cylinder;

[0009] The cooling coil is arranged between the far-infrared heating block and the extrusion cylinder and is wound around the extrusion cylinder for selectively cooling the extrusion cylinder.

[0010] On the basis of the above technical solution, preferably, a plurality of far-infrared heating blocks are provided on the extrusion barrel, and one cooling coil is provided at each far-infrared heating block.

[0011] On the basis of the above technical solution, preferably, the far-infrared heating block includes a jacket and a far-infrared heating tube, wherein,

[0012] The jacket is fixed on the extrusion barrel, and an inner cavity is formed between the jacket and the extrusion barrel;

[0013] The far-infrared heating tube is arranged in the inner cavity and fixedly connected to the jacket;

[0014] The cooling coil is arranged in the inner cavity.

[0015] On the basis of the above technical solution, preferably, the far-infrared heating tube is annular, and a plurality of the far-infrared heating tubes are equidistantly arranged along the axial direction of the extrusion cylinder.

[0016] On the basis of the above technical solution, preferably, the cooling coil is spirally wound on the extrusion barrel.

[0017] On the basis of the above technical solution, preferably, both ends of the cooling coil pass through the jacket to the outside, and water pipe joints are provided on both ends of the cooling coil.

[0018] On the basis of the above technical solution, preferably, one end of the cooling coil is a water inlet end, and the other end is a water outlet end, wherein,

[0019] A solenoid valve is provided on the water inlet end of the cooling coil.

[0020] On the basis of the above technical solution, preferably, the cross section of the cooling coil is a square tube, and a thermally conductive silicone sheet is sandwiched between the cooling coil and the extrusion barrel.

[0021] On the basis of the above technical solution, preferably, it further includes a cooling fan, wherein,

[0022] An air inlet is provided on the side of the jacket, and the air inlet is communicated with the inner cavity;

[0023] The air outlet end of the air cooler is fixed on the air inlet.

[0024] On the basis of the above technical solution, preferably, the air outlet end of the air cooler is in a bell-mouth shape.

[0025] The cable extruder heating device of the utility model has the following beneficial effects compared with the prior art:

[0026] (1) By setting up a far-infrared heating block and a cooling coil, it is convenient to heat the extrusion barrel through the far-infrared heating block, and when the heating temperature is high, the extrusion barrel is cooled by the cooling coil, thereby facilitating the control of the heating temperature and improving the extrusion quality. It is suitable for the extrusion of cable materials with high temperature requirements. At the same time, far-infrared heating is achieved through the far-infrared heating block, and the heating is more uniform and stable, making the extrusion barrel more uniform and stable. In addition, the electric heat conversion efficiency of far-infrared heating is high, and the energy-saving effect is significant.

[0027] (2) By setting up a cooling air blower, the extruder barrel can be cooled by air cooling, thereby improving the cooling effect.

[0028] (3) By setting the air outlet of the air cooler in a bell-mouth shape, the extruder barrel can be better exposed to the cold air, thereby improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the planar structure of a heating device for a cable extruder according to the present invention;

[0031] Figure 2 This is a partial structural diagram of a heating device for a cable extruder according to the present invention;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of the far-infrared heating block of the present invention;

[0033] In the figure: 1, extruder; 2, far-infrared heating block; 3, cooling coil; 4, air cooler; 21, jacket; 22, far-infrared heating tube; 201, inner cavity; 202, air inlet. DETAILED DESCRIPTION

[0034] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] like Figure 1-3 As shown, a cable extruder heating device of the present invention includes an extrusion barrel 1, a far-infrared heating block 2, a cooling coil 3 and a cooling air blower 4.

[0036] Among them, the far-infrared heating block 2 is wrapped on the extrusion barrel 1 and is used to perform far-infrared heating on the extrusion barrel 1. Compared with the existing heating method using cast aluminum heating blocks, the far-infrared heating is more uniform and the heating is more stable, thereby making the extrusion barrel 1 heated more uniformly and stably. In addition, the far-infrared heating method has high electrothermal conversion efficiency and significant energy-saving effect.

[0037] The cooling coil 3 is used to selectively cool the extrusion barrel 1. Specifically, the cooling coil 3 is arranged between the far-infrared heating block 2 and the extrusion barrel 1 and is wound around the extrusion barrel 1. When the extrusion barrel 1 needs to be cooled, a cooling medium, such as cooling water, is transported into the cooling coil 3. The cooling medium is used to cool the cooling coil 3, thereby indirectly cooling the extrusion barrel 1.

[0038] In the above-mentioned cable extruder heating device, several far-infrared heating blocks 2 are provided on the extrusion barrel 1, such as Figure 1 As shown, a cooling coil 3 is provided at each far-infrared heating block 2 , and each far-infrared heating block 2 includes a jacket 21 and a far-infrared heating tube 22 .

[0039] Among them, the jacket 21 includes two half shells, the extrusion barrel 1 is clamped and fixed between the two half shells, and flange structures are provided on the opposite ends of the two half shells. The two opposite flange structures are fixedly connected by bolts. When the two half shells are fixed on the extrusion barrel 1, a complete jacket 21 is formed; when the jacket 21 is fixed, an inner cavity 201 is formed between it and the extrusion barrel 1, and the far-infrared heating tube 22 is arranged in the inner cavity 201 and fixedly connected to the jacket 21. At the same time, the cooling coil 3 is also arranged in the inner cavity 201.

[0040] The far infrared heating tube 22 is used to generate infrared radiation energy to heat the extrusion barrel 1. Figure 3 As shown, the far-infrared heating tube 22 is annular, and a plurality of far-infrared heating tubes 22 are arranged equidistantly along the axial direction of the extrusion cylinder 1, so that the extrusion cylinder 1 is heated more evenly.

[0041] In addition, the far-infrared heating tube 22 can also be a straight tube. The straight far-infrared heating tube 22 is parallel to the extrusion cylinder 1 , and there are several straight far-infrared heating tubes 22 in a circular array along the circumference of the extrusion cylinder 1 .

[0042] In the above-mentioned cable extruder heating device, the cooling coil 3 is spirally wound on the extrusion barrel 1, and as shown in FIG. Figure 2 As shown, both ends of the cooling coil 3 pass through the jacket 21 to the outside, and water pipe joints are provided on both ends of the cooling coil 3 exposed to the outside. The water pipe joints are used to connect the cooling medium delivery pipeline. Specifically, one end of the cooling coil 3 is the water inlet end, and the other end is the water outlet end. The water inlet end is connected to the liquid supply port of the cooling medium delivery pipeline through the water pipe joint, and the water outlet end is connected to the liquid return port of the cooling medium delivery pipeline through the water pipe joint. In addition, in order to control the flow rate, a solenoid valve is provided on the water inlet end of the cooling coil 3. By supplying cooling medium to the cooling coil 3, the extrusion barrel 1 can be quickly cooled, effectively preventing overheating and overheating, and has strong practical value.

[0043] In addition, the cross-section of the cooling coil 3 is a square tube, and a thermally conductive silicone sheet is sandwiched between the cooling coil 3 and the extrusion barrel 1. The contact surface between the cooling coil 3 and the extrusion barrel 1 of this shape is larger, and the heat transfer effect is better. At the same time, a thermally conductive silicone sheet is also arranged between the contact surfaces, which makes the heat transfer effect better and is conducive to the rapid cooling of the extrusion barrel 1.

[0044] The above-mentioned cable extruder heating device also includes an air cooling structure. Specifically, an air cooler 4 is provided at each jacket 21. The air cooler 4 is a snail blower or a straight blower, wherein the air outlet end of the air cooler 4 is in a trumpet shape. At the same time, an air inlet 202 is provided on the side of the jacket 21. The air inlet 202 is connected to the inner cavity 201. The air outlet end of the air cooler 4 is fixed on the air inlet 202. When the extrusion barrel 1 needs to be cooled, the air cooler 4 blows cold air into the inner cavity 201 to achieve air cooling of the extrusion barrel 1. In conjunction with the cooling coil 3, the dual cooling functions of air cooling + water cooling are realized, so that the far-infrared heating block 2 can be stably heated and the extrusion barrel 1 can be quickly cooled to prevent overheating and overheating.

[0045] In addition, in order to maintain a stable air pressure in the inner cavity 201, a ventilation hole is provided on the jacket 21. During air cooling, the air in the inner cavity 201 can be discharged from the ventilation hole.

[0046] In order to collect the temperature inside the inner cavity 201 and the extrusion barrel 1, a temperature sensor is set on the far-infrared heating block 2, and the sensing end of the temperature sensor is set in the inner cavity 201. A temperature sensor is also set on the extrusion barrel 1, and the sensing end of the temperature sensor is set in the extrusion barrel 1.

[0047] The method of using the heating device of a cable extruder of the utility model is as follows:

[0048] During the extrusion process, the far-infrared heating block 2 heats the extrusion barrel 1 so that the extrusion barrel 1 reaches the required extrusion temperature. When the extrusion temperature needs to be lowered, the cooling medium is transported to the cooling coil 3 to cool the extrusion barrel 1, or cold air is blown to the extrusion barrel 1 through the air cooler 4 to achieve cooling, or the cooling coil 3 and the air cooler 4 work simultaneously. When the temperature drops to the target temperature, the cooling medium is stopped from being transported to the cooling coil 3 and the air cooler 4 is shut down.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cable extruder heating device, comprising an extrusion barrel (1), characterized in that: It also includes a far-infrared heating block (2) and a cooling coil (3), wherein: The far-infrared heating block (2) is wrapped around the extrusion cylinder (1) and is used to heat the extrusion cylinder (1); The cooling coil (3) is arranged between the far-infrared heating block (2) and the extrusion barrel (1), and is wound around the extrusion barrel (1), and is used to selectively cool the extrusion barrel (1).

2. A cable extruder heating device according to claim 1, characterized in that: A plurality of the far-infrared heating blocks (2) are arranged on the extrusion cylinder (1), and one cooling coil (3) is arranged at each far-infrared heating block (2).

3. A cable extruder heating device according to claim 1, characterized in that: The far-infrared heating block (2) comprises a jacket (21) and a far-infrared heating tube (22), wherein: The jacket (21) is fixed on the extrusion barrel (1), and an inner cavity (201) is formed between the jacket (21) and the extrusion barrel (1); The far-infrared heating tube (22) is arranged in the inner cavity (201) and is fixedly connected to the jacket (21); The cooling coil (3) is arranged in the inner cavity (201).

4. A cable extruder heating device according to claim 3, characterized in that: The far-infrared heating tube (22) is annular, and a plurality of the far-infrared heating tubes (22) are arranged at equal distances along the axial direction of the extrusion cylinder (1).

5. A cable extruder heating device according to claim 3, characterized in that: The cooling coil (3) is spirally wound on the extrusion barrel (1).

6. A cable extruder heating device according to claim 5, characterized in that: Both ends of the cooling coil (3) pass through the jacket (21) to the outside, and water pipe joints are provided on both ends of the cooling coil (3).

7. A cable extruder heating device according to claim 6, characterized in that: One end of the cooling coil (3) is a water inlet end, and the other end is a water outlet end, wherein: A solenoid valve is provided on the water inlet end of the cooling coil (3).

8. A cable extruder heating device according to claim 7, characterized in that: The cross section of the cooling coil (3) is in the shape of a square tube, and a heat-conducting silicone sheet is sandwiched between the cooling coil (3) and the extrusion barrel (1).

9. A cable extruder heating device according to claim 3, characterized in that: Also included is a cooling fan (4), wherein: An air inlet (202) is provided on the side of the jacket (21), and the air inlet (202) is communicated with the inner cavity (201); The air outlet end of the air cooler (4) is fixed on the air inlet (202).

10. A cable extruder heating device according to claim 9, characterized in that: The air outlet end of the cooling fan (4) is in a bell-mouth shape.

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