Extruder for production of high-temperature-resistant cable

Abstract

Provided in the present invention is an extruder for production of a high-temperature-resistant cable, the extruder comprising: an extruder, an extrusion die head, a cladding die head, an annular brush and a driving device, wherein the extrusion die head is arranged at a discharge end of the extruder in a communicating manner, the cladding die head is communicatively arranged at a wire input end of the extrusion die head, the extrusion die head can perform a surface insulation extrusion and cladding treatment on a wire passing through the extrusion die head, a wire input channel runs through the cladding die head, a wire output end of the wire input channel is in communication with the interior of the extrusion die head, the annular brush is rotationally arranged in the cladding die head, the annular brush is coaxially arranged outside of the wire input channel, bristles are provided on an inner circumferential surface of the annular brush, the surface of a wire passing through the inner ring of the annular brush can be brushed by the bristles, the driving device is arranged on the outside of the cladding die head, the driving device can drive the annular brush to rotate, a material inlet is provided at the upper end of the cladding die head, and the material inlet is in communication with the side surface of the wire input channel located upstream of the annular brush. By means of the present invention, a coating treatment can be performed on a core wire, so that the high-temperature resistance can be improved.

Description

An extruder for producing high-temperature resistant cables Technical Field

[0001] The present invention relates to the technical field of cable production equipment, in particular to an extruder for producing high-temperature resistant cables. Background Art

[0002] Cables are usually composed of conductors and insulation layers. The insulation layer is extruded and coated on the outside of the conductor through an extruder and a die head. In order to meet the high-temperature resistant production requirements, high-temperature resistant cables usually have more functional structural layers between the conductors and the insulation layer. Therefore, the insulation layer is usually coated on the outside of these structures.

[0003] Usually the extrusion die has a high temperature. During the extrusion process, the internal new material needs to coaxially enter the inner mold of the die and wrap around the extruded molten insulation layer. This causes the functional structure layer to directly contact the high-temperature die, which may cause the functional structure layer to melt or enter a high-viscosity state. If it contacts the molten insulation layer at this time, it will cause adhesion between the insulation layer and the internal structure layer, affecting the quality of the cable. Secondly, some high-temperature resistant cables need to be sintered or cured after the insulation layer is extruded, so that the insulation layer has good structural properties. If the sintering or curing temperature is too high and the internal structure layer has a tendency to increase viscosity or melt due to heat, this step is also likely to cause unnecessary adhesion and other quality problems.

[0004] Therefore, in order to ensure a certain degree of separation between the insulation layer and the internal structural layer during the extrusion process, the existing process usually attaches an anti-adhesion layer to the surface of the core wire before it enters the extrusion die head. The cover layer structure can be obtained by winding or coating. The coating process usually involves coating a layer of inorganic material, such as talcum powder, on the surface of the core wire. These powders have poor adhesion during coating and are therefore prone to pollution.

[0005] In view of this, how to avoid the contamination problem of the anti-adhesion layer coating has become one of the technical problems that need to be solved urgently.

[0006] Summary of the Invention

[0007] In view of this, the present invention proposes an extruder for producing high-temperature resistant cables, which reduces the problem of powder loss and pollution by integrating an anti-adhesion powder coating structure into the die head.

[0008] The technical solution of the present invention is implemented as follows: The present invention provides an extruder for the production of high-temperature resistant cables, including: an extruder, an extrusion die, a coating die, an annular brush and a driving device. The extrusion die is connected and arranged at the discharge end of the extruder, and the coating die is connected and arranged at the wire inlet end of the extrusion die. The extrusion die can perform surface insulation extrusion coating treatment on the wire passing through it. An inlet channel is provided through the coating die, and the outlet end of the inlet channel is connected with the interior of the extrusion die. An annular brush is rotatably arranged in the coating die, and the annular brush is coaxially arranged on the outside of the inlet channel. The inner circumferential surface of the annular brush is provided with bristles, and the bristles can brush the surface of the wire passing through the inner ring of the annular brush. The driving device is arranged on the outside of the coating die, and the driving device can drive the annular brush to rotate. A feed port is provided at the upper end of the coating die, and the feed port is connected to the side of the inlet channel located upstream of the annular brush.

[0009] In some embodiments, the driving device includes a motor and a synchronous belt. The motor is arranged on the surface of the coating die head. The output shaft of the motor is coaxially keyed to a first synchronous wheel. A second synchronous wheel is coaxially installed on the outer periphery of the annular brush. The first synchronous wheel and the second synchronous wheel are synchronously connected through a synchronous belt.

[0010] In some embodiments, a fixing frame is further included, wherein the surface of the covering die head is provided with an installation channel perpendicular to the length direction of the feed channel, the feed channel passes through the installation channel, the fixing frame is slidably arranged in the installation channel, the annular brush is rotatably arranged on the fixing frame, and the motor is fixed on the fixing frame.

[0011] In some embodiments, a bearing is further included, wherein the outer ring of the bearing is fixed on the fixing frame, and the inner ring of the bearing is coaxially fixedly connected to the annular brush.

[0012] In some embodiments, the mounting channel is arranged in a vertical direction.

[0013] In some embodiments, a limiting protrusion is provided on the surface of the fixing frame, and the limiting protrusion can selectively abut against the surface of the covering die head.

[0014] In some embodiments, a discharge port is provided at the lower end of the coating die head. The discharge port is arranged on a side of the annular brush away from the feed port, and the discharge port is communicated with the feed channel.

[0015] In some embodiments, a material receiving box is further included, which is detachably mounted on the lower end of the coating die head, with an opening of the material receiving box facing the discharge port.

[0016] In some embodiments, an outlet channel and an extrusion cavity arranged circumferentially outside the outlet channel are provided in the extrusion die head, the extrusion cavity is connected to the inner side of one end of the outlet line of the outlet channel, the discharge end of the extruder is connected to the extrusion cavity of the extrusion die head, and the outlet end of the inlet channel in the covering die head is connected to the inlet end of the outlet channel.

[0017] In some embodiments, a heat preservation cavity is further included, and the heat preservation cavity is sleeved on the outside of the extruder.

[0018] The extruder for producing high-temperature resistant cables of the present invention has the following beneficial effects compared to the prior art:

[0019] The extruder of the present invention is provided with a coating die head, and the coating die head is provided with an inlet channel and a feed port connected to the inlet channel. The feed port is used for feeding processing of the dressing. An annular brush structure is provided in the middle position of the inlet channel. When the inlet wire passes through the feed port of the coating die head, the internal coating material will be laid on the upper surface of the inlet wire. When passing through the annular brush structure, the dressing will be evenly covered on the circumferential surface of the inlet wire under the circumferential sweeping of the annular brush structure, completing the laying processing of the surface of the inlet wire. After the laying processing, the surface insulation material and the internal wire material can be prevented from adhering when the wire is extruded and coated in the extrusion die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] FIG1 is an axonometric view of an extruder for producing high-temperature resistant cables according to the present invention;

[0022] FIG2 is an exploded view of FIG1 ;

[0023] FIG3 is an exploded view of an extrusion die and a coating die in an extruder for producing high-temperature resistant cables according to the present invention;

[0024] FIG4 is an exploded view of the fixing frame portion of the extruder for producing high-temperature resistant cables according to the present invention;

[0025] FIG5 is a cross-sectional view of a coating die in an extruder for producing high-temperature resistant cables according to the present invention;

[0026] FIG6 is a cross-sectional view of an extrusion die head in an extruder for producing high-temperature resistant cables according to the present invention.

[0027] In the figure: 1-extruder, 2-extrusion die, 3-coating die, 4-annular brush, 5-driving device, 6-fixed frame, 7-bearing, 8-material receiving box, 9-insulation chamber, 21-outlet channel, 22-extrusion cavity, 31-inlet channel, 32-feed port, 33-installation channel, 34-outlet port, 41-brush, 51-motor, 52-synchronous belt, 53-first synchronous wheel, 54-second synchronous wheel, 61-limiting protrusion. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0029] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention belong. If the definitions set forth in this section are contrary to or otherwise inconsistent with definitions set forth in the patents, patent applications, published patent applications, and other publications incorporated herein by reference, the definitions listed in this section take precedence over the definitions incorporated herein by reference.

[0033] As shown in FIG1 , in combination with FIG2-6 , the extruder for producing high-temperature resistant cables of the present invention comprises: an extruder 1, an extrusion die 2, a coating die 3, an annular brush 4 and a driving device 5. The extrusion die 2 is connected to the discharge end of the extruder 1, and the coating die 3 is connected to the inlet end of the extrusion die 2. The extrusion die 2 can perform surface insulation extrusion coating on the wire passing through the inside thereof. A wire inlet channel 31 is provided through the coating die 3, and the outlet end of the wire inlet channel 31 is connected to the extrusion die. 2 is internally connected, an annular brush 4 is rotatably provided in the coating die 3, the annular brush 4 is coaxially arranged on the outside of the wire feed channel 31, the inner circumferential surface of the annular brush 4 is provided with bristles 41, and the bristles 41 can brush the surface of the wire passing through the inner ring of the annular brush 4, the driving device 5 is arranged on the outside of the coating die 3, the driving device 5 can drive the annular brush 4 to rotate, and a feed port 32 is provided at the upper end of the coating die 3, and the feed port 32 is connected to the side of the wire feed channel 31 located upstream of the annular brush 4.

[0034] In the above embodiment, the annular brush 4 has a circular skeleton structure and bristles 41 located on the inner circumferential surface of the circular ring.

[0035] In the above embodiment, the extruder 1 is a screw extruder, and the extrusion die 2 is used to coat the plasticized insulating material extruded by the extruder on the outer surface of the wire passing through the inside of the extrusion die 2. Before the wire enters the extrusion die 2, the wire needs to pass through the coating die 3. The inlet channel 31 in the coating die 3 is used for the passage and position limiting of the wire. An annular brush 4 is provided on the outside of one position of the inlet channel 31. The installation position of the annular brush 4 is connected to the inlet channel 31. Under the drive of the driving device 5, the inlet channel 31 is connected to the outer surface of the wire. The annular brush 4 rotates around its axis and brushes the circumferential surface of the wire located inside the annular brush 4. When the feed port 32 is filled with coating material, under the action of gravity, the coating material contacts the upper surface of the wire passing through the feed port 32 and covers the upper surface of the wire. After passing through the annular brush 4, under the action of the brush, the coating material covering the upper surface of the wire is evenly coated on the circumferential surface of the wire, and then discharged from the wire feed channel 31 and enters the extrusion die head 2 for extrusion insulation coating.

[0036] The above embodiment can achieve uniform filling and covering of the auxiliary material between the wire and the insulation material, has a simple structure, and can improve the isolation effect between the internal core wire and the surface insulation material of the high-temperature cable.

[0037] In some embodiments, the driving device 5 includes a motor 51 and a synchronous belt 52. The motor 51 is arranged on the surface of the coating die 3. The output shaft of the motor 51 is coaxially keyed to a first synchronous wheel 53. The outer periphery of the annular brush 4 is coaxially mounted with a second synchronous wheel 54. The first synchronous wheel 53 and the second synchronous wheel 54 are synchronously connected through a synchronous belt 52.

[0038] In the above embodiment, the annular brush 4 is coaxially arranged on the outer ring of the inlet channel 31, the motor 51 drives the first synchronous wheel 53 connected by the key to rotate, the first synchronous wheel 53 drives the synchronous belt 52 to rotate, and the synchronous belt 52 drives the second synchronous wheel 54 coaxially connected to the outside of the annular brush 4 by the key to rotate, finally causing the annular brush 4 to rotate.

[0039] In the above embodiment, the transmission structure of the synchronous wheel and the synchronous belt may also adopt belt and pulley transmission, chain and sprocket transmission, or gear transmission.

[0040] In some embodiments, a fixing frame 6 is further included, and a mounting channel 33 is provided on the surface of the covering die head 3 along a direction perpendicular to the length of the wire feed channel 31. The wire feed channel 31 passes through the mounting channel 33. The fixing frame 6 is slidably set in the mounting channel 33, and the annular brush 4 is rotatably set on the fixing frame 6. The motor 51 is fixed on the fixing frame.

[0041] In the above embodiment, the mounting bracket 6 is used to support the drive device 5 and the annular brush 4. By selectively inserting the mounting bracket 6 into the mounting channel 33, the annular brush 4 can be selectively installed on the inlet channel 31. This structure allows the annular brush 4 to be removed, replaced, and cleaned. Specifically, the mounting bracket 6 is provided with a corresponding wire passage. When the mounting bracket 6 is inserted into the mounting channel 33 and in place, the wire passage is coaxial with the inlet channel 31.

[0042] In some embodiments, a bearing 7 is further included, wherein the outer ring of the bearing 7 is fixed on the fixing frame 6 , and the inner ring of the bearing 7 is coaxially fixedly connected to the annular brush 4 .

[0043] In the above embodiment, the bearing 7 is used to rotationally connect the fixing frame 6 and the annular brush 4. The bearing 7 can be a deep groove ball bearing, the outer ring of which is fixed on the surface of the fixing frame 6, and the inner ring is fixedly connected to the side of the annular brush 4, thereby realizing the rotational connection between the annular brush 4 and the fixing frame 6.

[0044] In some embodiments, the mounting channel 33 is arranged along the vertical direction.

[0045] In the above embodiments, the vertically arranged installation channel 33 facilitates installation, disassembly and cleaning.

[0046] In some embodiments, a limiting protrusion 61 is provided on the surface of the fixing frame 6 , and the limiting protrusion 61 can selectively abut against the surface of the covering die head 3 .

[0047] In the above embodiment, in order to ensure that the annular brush 4 is coaxial with the wire inlet channel 31 after the fixing frame 6 is embedded in the installation channel 33, a limiting protrusion 61 is provided on the surface of the fixing frame 6. When the limiting protrusion 61 abuts against the surface of the covering die head 3, the fixing frame 6 is installed in place and the annular brush 4 is coaxial with the wire inlet channel 31.

[0048] In some embodiments, a discharge port 34 is provided at the lower end of the coating die 3 . The discharge port 34 is disposed on a side of the annular brush 4 away from the feed port 32 . The discharge port 32 is connected to the feed channel 31 .

[0049] In the above embodiment, since the coating material in the feed port 32 is covered on the surface of the new material by gravity, and the wire rod drives the coating material to move with it by friction, the coating material may be transported unevenly and there may be excessive transport. If excessive coating material enters the extrusion die 2 after passing through the annular brush 4, it may cause extrusion quality problems. Therefore, a discharge port 34 is provided downstream of the annular brush 4, that is, on the side close to the extrusion die 2, and the excess coating material is discharged through the discharge port. Preferably, the discharge port 34 opens vertically downward.

[0050] In some embodiments, a material receiving box 8 is further included. The material receiving box 8 is detachably mounted on the lower end of the coating die 3 , and the opening of the material receiving box 8 faces the discharge port 34 .

[0051] In the above embodiment, the material receiving box 8 is used to collect the material discharged from the discharge port 34 to avoid the discharge of the material from polluting the environment.

[0052] In the above embodiment, the material receiving box 8 can be detachably mounted on the surface of the coating die 3. Specifically, a slide groove is provided on the surface of the coating die 3, and a slider is provided on the side of the material receiving box 8. By embedding the slider in the slide groove, the material receiving box can be mounted on the surface of the coating die 3.

[0053] In some embodiments, an outlet channel 21 and an extrusion cavity 22 arranged circumferentially outside the outlet channel 21 are provided in the extrusion die 2, and the extrusion cavity 22 is connected to the inner side of one end of the outlet channel 21. The discharge end of the extruder 1 is connected to the extrusion cavity 22 of the extrusion die 2, and the outlet end of the inlet channel 31 in the covering die 3 is connected to the inlet end of the outlet channel 21.

[0054] In the above embodiment, the extrusion cavity 22 in the extrusion die head 2 is used to shape the shaped insulating material extruded by the extruder 1 to the circumference of the outlet channel 21 and cover the surface of the wire output from the basic channel 21. As the wire is transported, it is gradually covered to form an insulating layer. In the above embodiment, the channel diameter of the position where the extrusion cavity 22 is connected to the outlet channel 21 is larger than the wire diameter, and the extra diameter space serves as the flow space for the coated insulating material.

[0055] In some embodiments, a heat preservation cavity 9 is further included, and the heat preservation cavity 9 is sleeved on the outside of the extruder 1 .

[0056] In the above embodiments, the heat preservation cavity 9 is used to perform heat preservation treatment on the extruder.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, 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. An extruder for producing high temperature resistant cables, characterized in that: include: An extruder (1), an extrusion die (2), a coating die (3), an annular brush (4) and a driving device (5); the extrusion die (2) is connected to the discharge end of the extruder (1); the coating die (3) is connected to the wire inlet end of the extrusion die (2); the extrusion die (2) can perform surface insulation extrusion coating on the wire passing through the inside thereof; an inlet channel (31) is provided through the coating die (3); the outlet end of the inlet channel (31) is connected to the inside of the extrusion die (2); a rotating brush (4) is provided in the coating die (3) An annular brush (4) is coaxially arranged outside a wire inlet channel (31), and bristles (41) are arranged on the inner circumferential surface of the annular brush (4). The bristles (41) can brush the surface of the wire passing through the inner circle of the annular brush (4). A driving device (5) is arranged outside a coating die head (3), and the driving device (5) can drive the annular brush (4) to rotate. A feed inlet (32) is provided at the upper end of the coating die head (3), and the feed inlet (32) is communicated with the side of the wire inlet channel (31) located upstream of the annular brush (4).

2. The extruder for producing high temperature resistant cables according to claim 1, characterized in that: The driving device (5) comprises a motor (51) and a synchronous belt (52); the motor (51) is arranged on the surface of the coating die head (3); the output shaft of the motor (51) is coaxially keyed to a first synchronous wheel (53); a second synchronous wheel (54) is coaxially mounted on the outer periphery of the annular brush (4); and the first synchronous wheel (53) and the second synchronous wheel (54) are synchronously driven and connected via the synchronous belt (52).

3. The extruder for producing high temperature resistant cables according to claim 2, characterized in that: It also comprises a fixing frame (6), a mounting channel (33) is provided on the surface of the coating die head (3) in a direction perpendicular to the length of the inlet channel (31), the inlet channel (31) passes through the mounting channel (33), the fixing frame (6) is slidably arranged in the mounting channel (33), the annular brush (4) is rotatably arranged on the fixing frame (6), and the motor (51) is fixed on the fixing frame.

4. The extruder for producing high temperature resistant cables according to claim 3, characterized in that: It also comprises a bearing (7), the outer ring of the bearing (7) is fixed on the fixing frame (6), and the inner ring of the bearing (7) is coaxially fixedly connected with the annular brush (4).

5. The extruder for producing high temperature resistant cables according to claim 3, characterized in that: The installation channel (33) is arranged along the vertical direction.

6. The extruder for producing high temperature resistant cables according to claim 3, characterized in that: The surface of the fixing frame (6) is provided with a limiting protrusion (61), and the limiting protrusion (61) can selectively abut against the surface of the covering die head (3).

7. The extruder for producing high temperature resistant cables according to claim 1, characterized in that: The lower end of the coating die head (3) is provided with a discharge port (34), which is arranged on a side of the annular brush (4) away from the feed port (32), and the discharge port (32) is communicated with the feed channel (31).

8. The extruder for producing high temperature resistant cables according to claim 7, characterized in that: It also comprises a material receiving box (8), which is detachably mounted on the lower end of the coating die head (3), and the opening of the material receiving box (8) is directly opposite to the material outlet (34).

9. The extruder for producing high temperature resistant cables according to claim 1, characterized in that: The extrusion die (2) is provided with an outlet channel (21) and an extrusion cavity (22) arranged around the circumferential outer side of the outlet channel (21); the extrusion cavity (22) is connected to the inner side of one end of the outlet channel (21); the discharge end of the extruder (1) is connected to the extrusion cavity (22) of the extrusion die (2); and the outlet end of the inlet channel (31) in the covering die (3) is connected to the inlet end of the outlet channel (21).

10. The extruder for producing high temperature resistant cables according to claim 1, characterized in that: It also comprises a heat-insulating cavity (9), wherein the heat-insulating cavity (9) is sleeved on the outside of the extruder (1).

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