Extruder for cable

Abstract

The invention discloses an extruder for cables, and relates to the technical field of cable manufacturing equipment, the extruder comprises a housing, a transmission assembly and a heating assembly, and the housing is provided with a feed port, a heating cavity and a discharge port which are communicated in sequence. The transmission assembly comprises a rotating shaft and a transmission part which are arranged in the heating cavity, the rotating shaft is rotationally connected with the machine shell, and the transmission part is connected with the rotating shaft and can drive plastic particles in the heating cavity to move from the feeding port to the discharging port when the rotating shaft rotates. The heating assembly comprises a first heating piece and a second heating piece, the first heating piece is connected with the rotating shaft and arranged in the extending direction of the rotating shaft, and the second heating piece is connected with the machine shell and can drive the cavity wall of the heating cavity to heat. In the transmission process of the plastic particle stack, the first heating piece and the second heating piece heat the interior and the exterior of the plastic particle stack at the same time, so that the plastic particles are evenly heated, after the plastic particles are extruded by the forming structure, the formed cable rubber sleeve basically does not contain fine particles, and the produced cable is high in quality.

Description

Technical Field

[0001] The invention relates to the technical field of cable manufacturing equipment, and in particular to an extruder for cables. Background Art

[0002] An extruder is a commonly used plastic processing equipment. It pours plastic granule raw materials into the extrusion channel of the extruder through a hopper, and then heats the plastic granule raw materials in the extrusion channel to a molten state through a heating device inside the extruder. After that, it is extruded outward through the auger in the extrusion channel, and then cooled and formed to process the required plastic.

[0003] For example, the prior art with the announcement number CN218241446U discloses a uniform extruder for the mineral insulation layer of a cable, wherein an extrusion device is provided at the lower end of the stirring device, the extrusion device is connected to a surrounding molding die, a through cable channel for the cable to pass through is provided on the surrounding molding die, an extrusion twin screw is provided in the extrusion device, an extrusion guide tube is provided at the upper and lower ends of the extrusion twin screw, an annular guide channel is provided at a radial position corresponding to the extrusion device, the extrusion guide tube is connected to the annular guide channel, and the annular guide channel has discharge ports evenly distributed around the circumference thereof facing the axis, and the discharge port is connected to the cable channel. By setting the annular guide channel and the discharge port, the mixed material extruded from the end of the extrusion twin screw does not directly enter the cable channel, but first enters the annular guide channel, and when the annular guide channel is filled with a circle, it enters the cable channel from the discharge ports evenly distributed around the circumference due to the extrusion pressure, thereby achieving uniform wrapping of the cable in the circumferential direction, and achieving uniform wrapping on the cable as the cable moves forward.

[0004] However, the existing extruder still has defects. For example, when the spiral stirring transmission rod pushes the plastic particles forward, the heating device only heats the outside of the extruded plastic particles, resulting in uneven heating of the plastic particles. After the unevenly heated plastic particles are extruded, the inside of the plastic particles is not completely melted, and fine particles exist in the extruded cable rubber sheath, affecting the quality of the cable. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose an extruder for a cable, so as to solve the technical problems that the heating device of the extruder in the prior art only heats the outside of the extruded plastic particles, resulting in uneven heating of the plastic particles, incomplete melting of the unevenly heated plastic particles after extrusion, and fine particles in the extruded cable rubber sheath, which affects the quality of the cable.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an extruder for a cable, comprising: The casing is provided with a material inlet, a heating chamber and a material outlet which are connected in sequence; A transmission assembly, comprising a transmission member disposed in the heating chamber, the transmission member being rotatably connected to the housing, and the transmission member being capable of driving the plastic particle pile in the heating chamber to move from the inlet toward the outlet when rotating; and The heating assembly includes a first heating element and a second heating element. The first heating element is connected to the transmission element and is arranged along the length extension direction of the transmission element. The second heating element is connected to the casing and can drive the cavity wall of the heating cavity to generate heat.

[0007] In some embodiments, the rotating shaft is provided with a first heating channel along its rotation centerline, the first heating element is arranged in the first heating channel, and the first heating element can drive the outer wall of the rotating shaft to heat so as to heat the inside of the plastic particle pile.

[0008] In some embodiments, a second heating channel is provided in the housing, the second heating channel is arranged along the length extension direction of the rotating shaft, and the second heating element is arranged in the second heating channel.

[0009] In some embodiments, the second heating channel is disposed around the circumference of the heating chamber, and the second heating element is tubular and embedded in the second heating channel.

[0010] In some embodiments, the spiral blade is in an integrally formed spiral shape and is spirally arranged along the length extension direction of the rotating shaft.

[0011] In some embodiments, the heating component further includes a third heating element, which is connected to the transmission element and arranged along the spiral direction of the transmission element. The third heating element can drive the outer wall of the transmission element to generate heat.

[0012] In some embodiments, the transmission member is provided with a plurality of spaced third heating channels along its longitudinal direction, and there are a plurality of third heating members, each of which is correspondingly embedded in the third heating channel.

[0013] In some embodiments, the outer wall of the transmission member is provided with a plurality of arcuate grooves along its spiral path, and the plurality of arcuate grooves are arranged at intervals along the longitudinal direction of the transmission member.

[0014] In some embodiments, the cable extruder also includes a molding part, the molding part has a first annular cavity, the molding part is connected to the casing, and the first annular cavity is connected to the discharge port of the casing, and the molding part is provided with a fourth heating element at a position close to the first annular cavity.

[0015] In some embodiments, the cable extruder further includes a fan, which is connected to a molding outlet of the molded part and is used to cool the cable rubber sheath output from the molding outlet.

[0016] Compared with the prior art, during the processing of the cable extruder provided by the present invention, the plastic particles can be first poured into the heating chamber from the feed port, and the transmission member can be controlled to rotate, so that the transmission member drives the plastic particle pile to move toward the discharge port and output from the discharge port; during the movement of the plastic particles in the heating chamber, the first heating member and the second heating member are heated at the same time, and the first heating member is arranged along the length extension direction of the transmission member, and can heat the inside of the plastic particle pile; the second heating member drives the cavity wall of the heating chamber to heat, thereby heating the outside of the plastic particle pile. Therefore, during the transmission process of the plastic particle pile, the first heating member and the second heating member heat the inside and outside of the plastic particle pile respectively, so that the plastic particles are heated evenly, and after the plastic particles are extruded by the molding structure, the formed cable rubber sheath basically does not have fine particles, and the produced cable is of high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a cable extruder provided in an embodiment of the present invention; Figure 2 is a schematic diagram of the internal structure of a housing provided by an embodiment of the present invention; Figure 3 is a schematic cross-sectional structural diagram of a transmission member provided by an embodiment of the present invention; Figure 4 is a schematic diagram of the internal structure of a transmission member provided by an embodiment of the present invention; Figure 5 is a schematic cross-sectional structure diagram of a molded part provided in an embodiment of the present invention; Figure 6 is a schematic structural diagram of a shaping ring provided in an embodiment of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of a hollow ring provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problems in the prior art that the heating device of the extruder only heats the outside of the extruded plastic particles, resulting in uneven heating of the plastic particles, incomplete melting of the inside of the unevenly heated plastic particles after extrusion, and fine particles in the extruded cable rubber sheath, which affects the quality of the cable, the present invention provides an extruder for a cable, which can achieve all-round and uniform heating of the plastic particles, the plastic particles are heated evenly, the cable rubber sheath formed by molding and extrusion basically does not have fine particles, and the produced cable is of high quality.

[0020] See also Figure 1 , Figure 1 The schematic diagram of the structure of the cable extruder 100 in one embodiment of the present invention includes a housing 1, a transmission assembly 2 and a heating assembly 3. The housing 1 is provided with an inlet, a heating chamber and an outlet which are connected in sequence. The inlet is used for plastic particles to enter the heating chamber to form a plastic particle pile. The plastic particle pile is heated and melted in the heating chamber and output from the outlet. A hopper 11 is provided on the housing 1, and the hopper 11 is connected to the inlet. The staff can introduce the plastic particles into the hopper 11, and the plastic particles enter the heating chamber through the inlet.

[0021] The transmission assembly 2 includes a transmission member 21 disposed in the heating chamber, the transmission member 21 is rotatably connected to the housing 1, and the transmission member 21 can drive the plastic particle pile in the heating chamber to move from the inlet to the outlet when rotating. During the movement of the plastic particle pile from the inlet to the outlet, the plastic particle pile is heated by the heating assembly 3 to become a molten state, and is then shaped after being discharged from the outlet.

[0022] refer to Figure 2 The heating assembly 3 includes a first heating element 31 and a second heating element 32. The first heating element 31 is connected to the transmission element 21. When the first heating element 31 is working, it drives the transmission element 21 to generate heat. Since the transmission element 21 is located inside the plastic particle pile, the inside of the plastic particle pile can be heated. The first heating element 31 is arranged along the length extension direction of the transmission element 21. During the movement of the plastic particle pile along the length extension direction of the transmission element 21, the plastic particle pile can be heated by the first heating element 31 while moving. The heating time is long, which is conducive to full melting. The second heating element 32 is connected to the housing 1 and can drive the cavity wall of the heating chamber to heat so that the cavity wall of the heating chamber heats the outside of the plastic particle pile. Therefore, by heating together with the first heating element 31 and the second heating element 32, the inside and outside of the plastic particles can be heated at the same time, so that the plastic particles are heated evenly. After the plastic particles are extruded by the molding structure, the formed cable rubber sheath basically does not have fine particles, and the produced cable is of high quality.

[0023] In one embodiment, see Figure 3The transmission member 21 includes a rotating shaft 211 and a spiral blade 212 connected to each other. The rotating shaft 211 is rotatably connected to the housing 1. When the rotating shaft 211 rotates, it can drive the spiral blade 212 to rotate, so that the spiral blade 212 drives the plastic particle pile from the inlet to the outlet. A motor 22 is provided on the housing 1. The motor 22 is connected to the rotating shaft 211 and is used to drive the rotating shaft 211 to rotate, thereby driving the spiral blade 212 to rotate. In this embodiment, the rotating shaft 211 is provided with a first heating channel 213 along its rotation center line. At least one end of the first heating channel 213 passes through the rotating shaft 211, so that the power line of the first heating element 31 can be led out and connected to the power supply. The first heating element 31 is arranged in the first heating channel 213. When the first heating element 31 is powered on, it can drive the outer wall of the rotating shaft 211 to heat up, so that the rotating shaft 211 heats the inside of the plastic particle pile.

[0024] In one embodiment, see Figure 2 , a second heating channel (not shown in the figure) is provided in the casing 1, and the second heating channel is arranged along the length extension direction of the rotating shaft 211, and can also be understood as being arranged along the length direction of the casing 1 or the movement direction of the plastic particle pile. The second heating element 32 is arranged in the second heating channel, and the second heating element 32 can drive the cavity wall of the heating cavity to heat up when generating heat, thereby heating the outside of the plastic particle pile. In this embodiment, at least one end of the second heating channel passes through the casing 1, so that the power cord of the second heating element 32 can be led out to connect to the power supply. In addition, the second heating element 32 can completely cover the casing 1 or partially cover it, depending on the time required to heat the plastic particles. The outer wall of the casing 1 can be coated with a heat-insulating layer to prevent the staff from accidentally touching the outer wall of the casing 1 and causing burns.

[0025] In one embodiment, see Figure 2 , the second heating channel is arranged around the circumference of the heating chamber, which can be understood as the longitudinal cross-section of the second heating channel is annular, and the second heating element is tubular and embedded in the second heating channel. In this embodiment, the second heating element can heat the casing 1 in an all-round 360° manner, so that the circumference of the heating chamber wall is in a high temperature state, which is beneficial to improve the heating efficiency of the plastic particle pile, and the plastic particles can be fully melted. The second heating element is embedded in the second heating channel, which is beneficial to save occupied space. In other embodiments, the second heating element can also be arranged on the cavity wall of the heating chamber so that the second heating element can directly heat the plastic particle pile. In other embodiments, the second heating element can be set to a semicircular state, or in other shapes. In addition, the second heating element can also be composed of multiple heating components, and the multiple heating components are arranged at intervals and connected to each other, and are all arranged in the second heating channel to heat the casing 1.

[0026] In some embodiments, see Figure 2The spiral blade 212 is in an integrally formed spiral shape and is spirally arranged along the length extension direction of the rotating shaft 211. The rotating shaft 211 can drive the entire spiral blade 212 to rotate when rotating, and the transmission efficiency of the plastic particle pile is high. In other embodiments, the spiral blade 212 can be composed of multiple spiral components, and the multiple spiral components are all connected to the rotating shaft 211 and are arranged at intervals. The multiple spiral components are not connected to each other, and can also drive the plastic particle pile to move when the rotating shaft 211 rotates.

[0027] In one embodiment, see Figure 4 The heating assembly 3 also includes a third heating element 33, which is connected to the spiral blade 212 and arranged along the spiral direction of the spiral blade 212, which is beneficial to increase the heating area of ​​the spiral blade 212 and improve the heating efficiency and heating time of the plastic particle pile. In this embodiment, the third heating element 33 is embedded in the spiral blade 212. When working, the third heating element 33 can drive the spiral blade 212 to generate heat to heat the plastic particle pile in contact with the spiral blade. In addition to the first heating element 31 and the second heating element 32 heating the plastic particle pile, the spiral blade 212 can play an auxiliary heating role, so that the plastic particle pile is heated more evenly and the heating effect is better. After the plastic particles are extruded and formed by the molding structure, the cable rubber sheath formed is of better quality.

[0028] In one embodiment, see Figure 4 The spiral blade 212 is provided with a plurality of spaced third heating channels 214 along its longitudinal direction, and each third heating channel 214 is arranged along the spiral path of the spiral blade 212. There are a plurality of third heating elements 33, and each third heating element 33 is correspondingly embedded in the third heating channel 214. The shape of the third heating element 33 is adapted to the third heating channel 214, and both are spiral-shaped. The third heating elements 33 are arranged along the spiral direction of the spiral blade 212, and the number of the third heating elements 33 is multiple. When the plurality of third heating elements 33 generate heat at the same time, they can drive the spiral blade 212 to heat to a preset temperature in a very short time, and the spiral blade 212 has a large heating area, which is conducive to improving the heating efficiency of the plastic particle pile.

[0029] In one embodiment, see Figure 4 The outer wall of the spiral blade 212 is provided with a plurality of arc grooves 215 along its spiral path, and the plurality of arc grooves 215 are arranged at intervals along the longitudinal direction of the spiral blade 212. The longitudinal direction in the present application can be understood as a direction perpendicular to the rotating shaft 211. By providing the arc grooves 215, it is beneficial to increase the heating area of ​​the spiral blade 212 and improve the heating efficiency of the plastic particle pile.

[0030] In one embodiment, see Figure 1 and Figure 5The cable extruder 100 further includes a molding part 4 and a guide tube 8, one end of the guide tube 8 is connected to the discharge port of the housing 1, and the other end of the guide tube 8 is connected to the molding part 4. The plastic particles heated in the heating chamber are discharged to the molding part 4 through the guide tube 8, so that the plastic particles form a cable sheath. The molding part 4 has a first annular cavity 41, the molding part 4 is connected to the housing 1, and the first annular cavity 41 is connected to the guide tube 8, and the discharge port of the housing 1 is connected to the guide tube 8. The molding part 4 is provided with a fourth heating element 34 at a position close to the first annular cavity 41. When the heated plastic particles reach the first annular cavity 41, the fourth heating element 34 can heat the plastic particles so that the plastic particles can be kept warm to prevent the solidification of the plastic particles from affecting the molding effect.

[0031] The molded part 4 is also provided with a connecting cavity 42 and a second annular cavity 43. The second annular cavity 43 is connected to the first annular cavity 41 through the connecting cavity 42, and the plastic particles can enter the second annular cavity 43 from the first annular cavity 41 through the connecting cavity 42. The space of the second annular cavity 43 is smaller than the space of the first annular cavity 41, and the plastic particles are extruded into a rubber sleeve tube after being shaped by the second annular cavity 43.

[0032] The molded part 4 is also provided with a cell cavity 44 and a mixing cavity 45. The mixing cavity 45 is connected to the cell cavity 44 and the second annular cavity 43. The cell cavity 44 is located inside the second annular cavity 43. The cell cavity 44 is used to allow the cell to be inserted into the mixing cavity 45. The plastic particles in the second annular cavity 43 are formed and extruded and then extend into the mixing cavity 45 and cover the cell in the mixing cavity 45 to form a cable.

[0033] refer to Figure 6 A shaping ring 46 is provided on the inner wall of the second annular cavity 43 near the outlet, and the shaping ring 46 is sleeved on the molded part 4 for fixing. The outer wall of the shaping ring 46 is provided with a plurality of evenly arranged protrusions 47 along its circumference, and the plastic particles can be squeezed by the protrusions 47 when they are led out along the second annular cavity 43, so that a plurality of evenly arranged concave parts are formed on the inner wall of the molded rubber sleeve, and the rubber sleeve can increase the contact area with the outer wall of the battery cell when attached to the battery cell, thereby improving the wrapping effect of the rubber sleeve and the battery cell, which is beneficial to improving the quality of the cable.

[0034] refer to Figure 7The mixing chamber 45 is provided with a hollow ring 5, which includes an inner ring 51 and an outer ring 52. One end of the inner ring 51 and the outer ring 52 are connected, and the connection end faces the second annular chamber 43, and the connection end does not block the wire passage 512 of the inner ring 51. The inner ring 51 and the outer ring 52 are spaced to form an air inlet channel 53. The inner ring 51 is provided with a plurality of air inlet holes 511 along its circumference. The air inlet holes 511 connect the air inlet channel 53 and the wire passage 512 inside the inner ring 51. The wire passage 512 is used for the cable to pass through. In addition, a plurality of air inlet holes 511 are provided along the length extension direction of the hollow ring 5 to further increase the number of air inlet holes 511, so that more parts of the cable can be cooled by air blowing at the same time.

[0035] In one embodiment, see Figure 1 The cable extruder 100 also includes a fan 6, which is connected to the molding outlet of the molded part 4 through an air supply pipe 61. It can be understood that the fan 6 is connected to the end of the mixing chamber 45 away from the battery cell chamber 44, that is, the fan 6 is connected to the air inlet channel 53 of the hollow ring 5. The fan 6 transports air to the air inlet channel 53, and the air flow blows air to the surrounding side of the cable through multiple air inlet holes 511 to evenly cool the surrounding side of the molded cable to prevent the rubber sheath from falling before the cable moves to the coolant.

[0036] The cable extruder 100 also has a mounting base plate 7, which is connected to the housing 1 via a fixing block 72. The four corners of the mounting base plate 7 have screw holes 71 for screws to pass through, so as to install the cable extruder 100 at a preset position.

[0037] In order to better understand the present invention, the following Figures 1 to 7 The technical solution of the present invention is described in detail: In actual use, the plastic particles are first introduced into the heating chamber of the casing 1 from the hopper 11, and the motor 22 drives the rotating shaft 211 to rotate, and the rotating shaft 211 drives the spiral blade 212 to rotate. The spiral blade 212 pushes the plastic particles in the heating chamber and extrude them. At the same time, the first heating element 31, the second heating element 32 and the third heating element 33 are used to heat the inside and the outside of the plastic particles synchronously, so that the plastic particles are heated evenly and the hot melting effect is better. The cable rubber sheath after extrusion molding of the plastic particles can avoid the presence of fine plastic particles, thereby ensuring the quality of the cable rubber sheath after extrusion and improving the quality of cable processing. A plurality of evenly distributed arc grooves 215 are provided on both surfaces of the spiral blade 212. When the spiral blade 212 is used to extrude and heat the plastic particles, the contact area between the spiral blade 212 and the plastic particles is large, which can further improve the heating effect of the plastic particles and the hot melting effect of the plastic particles. After the hot-melted plastic particles are introduced into the molded part 4, they first enter the first annular cavity 41, then enter the second annular cavity 43 along the connecting cavity 42, and then are led out along the discharge port of the second annular cavity 43 to form a tubular rubber sleeve. At the same time, the battery cell is pulled along the battery cell cavity 44, so that the formed rubber sleeve can be sleeved on the battery cell to form the cable. When the plastic particles are led out along the second annular cavity 43, they can be squeezed by the shaping ring 46, so that the inner wall of the formed rubber sleeve will form a plurality of evenly distributed recessed parts, so that when the sleeve is attached to the battery cell, the contact area with the outer wall of the battery cell can be increased, the wrapping effect of the rubber sleeve and the battery cell is improved, and the quality of cable processing is improved again. When the rubber sleeve is wrapped around the battery core and moves outward, air can be blown into the hollow ring 5 through the fan 6, and the airflow can blow along the multiple holes in the inner cavity of the hollow ring 5 to the outer surface of the cable rubber sleeve, thereby performing initial cooling on it, avoiding the rubber sleeve from falling before moving to the coolant, and thus ensuring that the rubber sleeve is not deformed after wrapping the cable core, which can further improve the cable processing quality.

[0038] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cable extruder, characterized in that: include: The casing is provided with a material inlet, a heating chamber and a material outlet which are connected in sequence; A transmission assembly, comprising a transmission member disposed in the heating chamber, the transmission member being rotatably connected to the housing, and the transmission member being capable of driving the plastic particle pile in the heating chamber to move from the inlet toward the outlet when rotating; and The heating assembly includes a first heating element and a second heating element. The first heating element is connected to the transmission element and is arranged along the length extension direction of the transmission element. The second heating element is connected to the casing and can drive the cavity wall of the heating cavity to generate heat.

2. The cable extruder according to claim 1, characterized in that: The transmission member includes a rotating shaft and a spiral blade connected to each other. The rotating shaft is rotatably connected to the casing. The rotating shaft has a first heating channel along its rotation center line. The first heating member is arranged in the first heating channel. The first heating member can drive the outer wall of the rotating shaft to generate heat to heat the interior of the plastic particle pile.

3. The cable extruder according to claim 1, characterized in that: A second heating channel is provided in the housing, the second heating channel is arranged along the length extension direction of the transmission member, and the second heating member is arranged in the second heating channel.

4. The cable extruder according to claim 3, characterized in that: The second heating channel is arranged around the circumference of the heating chamber, and the second heating element is tubular and embedded in the second heating channel.

5. The cable extruder according to claim 2, characterized in that: The spiral blade is in an integrally formed spiral shape and is spirally arranged along the length extension direction of the rotating shaft.

6. The cable extruder according to claim 5, characterized in that: The heating assembly further includes a third heating element, which is connected to the transmission element and is arranged along the spiral direction of the spiral blade. The third heating element can drive the outer wall of the spiral blade to generate heat.

7. The cable extruder according to claim 6, characterized in that: The spiral blade is provided with a plurality of spaced third heating channels along its longitudinal direction. There are a plurality of third heating elements, and each of the third heating elements is correspondingly embedded in the third heating channel.

8. The cable extruder according to claim 5, characterized in that: The outer wall of the spiral blade is provided with a plurality of arc grooves along its spiral path, and the plurality of arc grooves are arranged at intervals along the longitudinal direction of the spiral blade.

9. The cable extruder according to claim 1, characterized in that: The cable extruder also includes a molding part, which has a first annular cavity. The molding part is connected to the casing, and the first annular cavity is connected to the discharge port of the casing. The molding part is provided with a fourth heating element at a position close to the first annular cavity.

10. The cable extruder according to claim 9, characterized in that: The cable extruder also includes a fan, which is connected to the molding outlet of the molding part and is used to cool the cable rubber sheath output from the molding outlet.

Images