CN113744937B - Adjustable extrusion head for cladding cable - Google Patents
Adjustable extrusion head for cladding cable Download PDFInfo
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- CN113744937B CN113744937B CN202111055159.XA CN202111055159A CN113744937B CN 113744937 B CN113744937 B CN 113744937B CN 202111055159 A CN202111055159 A CN 202111055159A CN 113744937 B CN113744937 B CN 113744937B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/147—Feeding of the insulating material
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Abstract
The invention discloses an adjustable cable cladding extrusion head, which comprises a casing, wherein the front end of the casing is connected with an outer die adjusting seat, one side of the casing is provided with a connecting seat which can be connected with two extruders, the outer die adjusting seat is provided with an outer connecting seat which can be connected with the extruders, the front end of a middle layer of split fluid in the casing is provided with a middle die sleeve, the front end of an inner layer of split fluid is provided with an inner die sleeve through an inner die adjusting pipe, the outer die adjusting seat is internally provided with an outer layer of split fluid and an outer die sleeve, the inner die sleeve and the outer die sleeve are arranged in an aligning manner, the middle layer of split fluid and the inner layer of split fluid are axially positioned and adjustable, a plurality of heating units are distributed in the casing along the circumferential direction, and each group of heating units is correspondingly provided with at least one temperature sensor. The adjustable cable coating extrusion head can regulate concentricity among insulating layers, is convenient for controlling compaction degree and coating adhesive force of coating materials of the insulating layers, improves cable quality, and can enable cable production equipment to occupy small space and be convenient to operate.
Description
Technical Field
The invention relates to cable production equipment, in particular to improvement of an extrusion head in multilayer insulated cable production equipment.
Background
The multi-layer insulating cable is a cable with a multi-layer insulating coating layer, and is widely applied to various industries and key equipment. The multi-layer insulated cable must ensure concentricity between each insulating layer and between the insulating layer and the conductor, and ensure smoothness of the surface of each extruded insulating coating material and compact compaction of each insulating coating material, so that the cable has higher quality and meets the use requirement. The quality of the multi-layer insulated cable is not only dependent on the manufacturing quality of the extrusion head, but also closely related to the structure of the extrusion head and technological parameters in the extrusion process, the conventional extrusion head comprises a molding outer die, a positioning inner die concentric with the molding outer die and two to three split bodies, the cladding materials of each insulating layer are extruded by a plurality of extruders to form annular cladding layers through the corresponding split bodies, the cladding layers enter the annular cavities between the molding outer die and the positioning inner die to be converged into multi-layer insulated cladding, and the temperature, the pressure and other technological parameters in the plasticizing process are different due to different cladding materials used by each insulating layer.
In the conventional production process of the multilayer insulated cable, a plurality of extruders are usually used for feeding materials into the extrusion heads in a counter-extrusion mode, for example, two extruders are respectively arranged at two sides of one extrusion head and simultaneously feed materials into the extrusion heads, so that the width of a production line becomes large, a large production field is occupied, and the operation staff is inconvenient to pass and difficult to operate.
In addition, the heater is a necessary device for ensuring the fluidity of the coating material and improving the coating quality in the extrusion head, the heater is circumferentially distributed in the shell, the extrusion head is kept in a certain temperature range by heating of the heater, and the temperature of the heater in the conventional extrusion head is measured by a temperature sensor distributed in the shell to determine the opening and closing of the heater, but because the heat dissipation conditions of all parts in the extrusion head are not consistent, the simple opening and closing control of the heater still causes larger temperature difference of all parts in the extrusion head, which causes the difference of flow rate or pressure caused by different temperatures of the coating material at different runner parts, and is unacceptable for manufacturing high-quality cables.
Disclosure of Invention
Aiming at the defects existing in the prior art, the technical problem to be solved by the invention is to provide the adjustable cable coating extrusion head which can regulate and control concentricity among insulating layers, is convenient for controlling the compaction degree and coating adhesive force of coating materials of the insulating layers, improves the cable quality, and can lead the occupied area of cable production equipment to be small and is convenient to operate.
In order to solve the technical problems, the invention provides an adjustable cable cladding extrusion head, which comprises a shell, an outer layer of fluid, a middle layer of fluid, an inner layer of fluid and a feeding channel arranged on the shell, wherein an outer die adjusting seat is arranged at the front end of the shell, a connecting seat is arranged on the shell, two feeding channels are arranged on the connecting seat, the outlet ends of the two feeding channels are respectively communicated with the corresponding feeding channels on the shell, the axis of the inlet end of one feeding channel is obliquely arranged towards the front end of the shell, and the axis of the inlet end of the other feeding channel is obliquely arranged towards the rear end of the shell; an outer feeding channel is arranged on the outer die adjusting seat, an outer connecting seat is arranged on the outer die adjusting seat, an outer feeding channel is arranged on the outer connecting seat, and the outlet end of the outer feeding channel is communicated with the outer feeding channel; the middle layer split fluid is fixedly connected in an inner taper hole of the shell, a middle die sleeve is arranged at the front end of the middle layer split fluid, the inner layer split fluid is arranged in the inner taper hole of the middle layer split fluid, an inner die adjusting pipe is arranged in an inner hole of the inner layer split fluid through a spherical bearing pair, an inner die sleeve is arranged at the front end of the inner die adjusting pipe, and the rear end of the inner die adjusting pipe is fixedly connected with the inner layer split fluid in a aligning manner; the outer layer split fluid is movably inserted into an inner hole of the outer die adjusting seat along the axial direction, an outer die fixing sleeve is arranged at the outer end of the outer layer split fluid, the outer die fixing sleeve is fixedly connected with the outer die adjusting seat in an aligning manner, and an outer die sleeve is arranged in the inner hole of the outer die fixing sleeve; a first annular cavity is arranged between the outer die sleeve and the middle die sleeve, the first annular cavity is communicated with a splitter box on the middle-layer split fluid, the splitter box on the middle-layer split fluid is communicated with a corresponding feeding channel arranged on the shell, the first annular cavity is also communicated with a splitter box on the outer-layer split fluid, the splitter box on the outer-layer split fluid is communicated with an outer feeding channel arranged on the outer die adjusting base, a second annular cavity is arranged between the middle die sleeve and the inner die sleeve, the second annular cavity is communicated with a splitter box on the inner-layer split fluid, and the splitter box on the inner-layer split fluid is communicated with a corresponding feeding channel on the shell through a through hole on the wall of the middle-layer split fluid sleeve; a plurality of heating units are distributed in the shell along the circumferential direction, and each group of heating units is correspondingly provided with at least one temperature sensor; the feeding channel and the outer feeding channel are respectively provided with a feeding switching valve core, the feeding switching valve core is provided with a feeding main channel and a bypass channel, the inlet end of the feeding channel is communicated with the outlet end of the feeding channel through the feeding main channel, the inlet end of the feeding channel can be communicated with the outside of the connecting seat through the bypass channel, the inlet end of the outer feeding channel is communicated with the outlet end of the outer feeding channel through the feeding main channel, and the inlet end of the outer feeding channel can be communicated with the outside of the outer connecting seat through the bypass channel.
In the structure, as the connecting seat is arranged on the shell, two feeding channels are arranged on the connecting seat, the outlet ends of the two feeding channels are respectively communicated with the corresponding feeding channels on the shell, the axis of the inlet end of one feeding channel is obliquely arranged towards the front end of the shell, the axis of the inlet end of the other feeding channel is obliquely arranged towards the rear end of the shell, the outer feeding channel is arranged on the outer die adjusting seat, the outer connecting seat is arranged on the outer die adjusting seat, the outer feeding channel is arranged on the outer connecting seat, the outlet end of the outer feeding channel is communicated with the outer feeding channel, the extrusion head can be connected with two extruders through the connecting seat, the two feeding channels on the connecting seat are respectively communicated with the corresponding extruder discharge ports, the two extruders can be arranged on the same side of the extrusion head, the two feeding channels are respectively obliquely arranged towards the front end and the rear end of the extrusion head, the two extruders and the extrusion head are ensured to have enough installation space, the extrusion head can be connected with the extruder through the outer connecting seat besides the connecting seat, the outer connecting seat can also be arranged on the same side as the connecting seat, at the moment, the extrusion head can be connected with the two extruders through the two connecting seats and the two extruders through the outer connecting seat and the connecting seat respectively, thereby meeting the configuration requirements of different insulating materials when the two-layer insulated cable is produced, the layout can also lead the distance between the extruder and the extrusion head to be very close and the distance between the two extruders and the extrusion head to be basically equal, the conveying and extrusion quality control of the two different coating materials are very beneficial, compared with the opposite extrusion layout mode of adopting the two extruders distributed on the two sides of the extrusion head, the occupied space of cable production equipment is small, the passing and operation of operators are very convenient; the outer connecting seat can be further arranged on the upper side of the extrusion head and connected with a third extruder, so that the coating of three layers of insulating materials can be realized, and the production requirements of the multi-layer insulating cable are better met.
The middle layer split fluid is fixedly connected in an inner taper hole of the shell, the front end of the middle layer split fluid is provided with a middle die sleeve, the inner layer split fluid is installed in the inner taper hole of the middle layer split fluid, an inner die adjusting pipe is installed in the inner hole of the inner layer split fluid through a spherical bearing pair, the front end of the inner die adjusting pipe is provided with an inner die sleeve, the rear end of the inner die adjusting pipe is fixedly connected with the inner layer split fluid in an adjustable center manner, the outer layer split fluid is movably inserted in an inner hole of an outer die adjusting seat along the axial direction, the outer end of the outer layer split fluid is provided with an outer die fixing sleeve, the outer die fixing sleeve is fixedly connected with the outer die adjusting seat in an adjustable center manner, the middle die sleeve arranged at the front end of the middle layer split fluid is fixedly arranged relative to the shell, and the inner die sleeve arranged at the front end of the inner die adjusting pipe installed in the inner layer split fluid through a spherical bearing pair is fixedly connected with the inner die adjusting pipe through the rear end of the inner die adjusting pipe in an adjustable center manner, so that the center position of the inner die sleeve can be changed, and the insulating layer is uniformly formed between the middle die sleeve and the inner die adjusting seat in a radial direction, and the insulating layer is uniformly formed, and the insulating layer is uniformly and the insulating layer is formed; the outer die sleeve arranged in the inner hole of the outer die fixing sleeve can change the central position along with the outer die fixing sleeve through the adjustable central fixed connection between the outer die fixing sleeve and the outer die adjusting seat, so that the radial forming size of the insulating coating layer between the central die sleeve and the outer die sleeve can be adjusted, the thickness of the insulating coating layer along the circumferential direction is uniform, and the concentricity between the insulating layer and the adjacent insulating layer is ensured.
The first annular cavity is communicated with the diversion grooves on the middle-layer diversion body, the diversion grooves on the middle-layer diversion body are communicated with the corresponding feeding channels arranged on the shell, the first annular cavity is also communicated with the diversion grooves on the outer-layer diversion body, the diversion grooves on the outer-layer diversion body are communicated with the outer feeding channels arranged on the outer die adjusting seat, a second annular cavity is arranged between the middle die sleeve and the inner die sleeve, the second annular cavity is communicated with the diversion grooves on the inner-layer diversion body, the diversion grooves on the inner-layer diversion body are communicated with the corresponding feeding channels on the shell through the through holes on the wall of the middle-layer diversion body, and an insulating coating material provided by an extruder communicated with the inner-layer diversion body forms an inner-layer insulating layer through the second annular cavity; the first annular cavity arranged between the outer die sleeve and the middle die sleeve is communicated with the diversion grooves on the outer layer diversion body and the middle layer diversion body, the outer layer diversion body is positioned at the front end of the middle layer diversion body, when only the outer layer diversion body or only the middle layer diversion body is communicated with the second extruder, the insulation coating material provided by the extruder flows to the first annular cavity through the outer layer diversion body or the middle layer diversion body to form an outer insulation layer, so that a two-layer insulation cable is produced, the middle layer diversion body is communicated with the corresponding second extruder, and when the outer layer diversion body is communicated with the corresponding third extruder, the insulation coating material provided by the second extruder is formed into a middle insulation layer through the middle layer diversion body, the insulation coating material provided by the third extruder forms an outer insulation layer outside the insulation layer formed by the middle layer diversion body through the insulation coating material provided by the second extruder, and the middle insulation layer and the outer insulation layer are coated on the inner insulation layer which is coated through the first annular cavity, so that a three-layer insulation cable is produced; because the outer-layer fluid is movably inserted into the inner hole of the outer-mold die-adjusting seat along the axial direction, the first annular cavity can adjust the cavity thickness of the first annular cavity through the change of the axial position of the outer-layer fluid, namely the flow area of the first annular cavity can be adjusted, so that the passing flow speed and the passing resistance of the insulating coating material flowing through the first annular cavity can be regulated, the extrusion pressure of the insulating coating material extruded through the first annular cavity can be changed, and the effect of controlling the compaction degree and the coating adhesion force of the insulating layer formed through the first annular cavity can be achieved; and the axial position of the inner die sleeve arranged at the front end of the inner die adjusting pipe is changed, so that the flow area of the second annular cavity can be adjusted, the compact degree of an insulating layer formed by the second annular cavity and the effect of coating adhesion force can be controlled, and the cable quality is improved.
And because a plurality of heating units are distributed in the shell along the circumferential direction, each group of heating units is correspondingly provided with at least one temperature sensor, each heating unit can be independently started to be heated or closed according to the temperature measurement data of the corresponding temperature sensor, compared with the prior art that each heater is simultaneously started and closed, the control of the temperature in the extrusion head is more accurate, and the temperature difference of each part is smaller, thereby being beneficial to further improving the quality of the produced cables.
According to the invention, the output route of the feeding can be changed by means of the feeding switching valve core, and before the formal production is started, the coating material can be output from the bypass channel to the outside of the connecting seat or the outer connecting seat by the feeding switching valve core, so that the state of the coating material can be checked, after the state of the coating material is normal, the feeding switching valve core is rotated to convey the coating material from the main feeding channel to the feeding channel or the outer feeding channel to enter the formal production stage, the yield of the produced cable is ensured, the waste is reduced, and the economic benefit and the production efficiency are improved.
In another preferred embodiment of the present invention, the included angle α between the axis of the inlet end of the first feeding channel and the axis of the casing is 40 ° to 60 °, and the included angle β between the axis of the inlet end of the other feeding channel and the axis of the casing is 40 ° to 60 °; the axis of the inlet end of the outer feed channel is inclined towards the front end of the outer die adjusting seat, and the included angle gamma between the axis of the inlet end of the outer feed channel and the axis of the shell is 40-60 degrees. With this embodiment, it is possible to ensure that there is sufficient installation space between the extruder and the extrusion head and between the two extruders.
In another preferred embodiment of the present invention, the outer periphery of the middle layer of the split fluid is attached to the inner taper hole of the casing, an axial positioning adjusting device is arranged between the rear end of the middle layer of the split fluid and the casing, the outer periphery of the inner layer of the split fluid is attached to the inner taper hole of the middle layer of the split fluid, and an axial positioning adjusting device is arranged between the rear end of the inner layer of the split fluid and the middle layer of the split fluid. According to the embodiment, through the arranged axial positioning adjusting device, the consistency of the outer periphery of the middle layer split fluid matched with the conical hole in the shell after each disassembly and the consistency of the inner layer split fluid matched with the conical hole in the middle layer split body after each disassembly are ensured, the middle layer split fluid and the inner layer split fluid which are required to be disassembled and cleaned frequently are very important, especially after the middle layer split fluid or the inner layer split body is disassembled, the shell or the middle layer split fluid in the shell still maintains relatively high working temperature, the middle layer split fluid separated from the shell or the inner layer split fluid separated from the middle layer split fluid can be reduced in temperature in the cleaning process to generate cold shrinkage phenomenon, after the middle layer split fluid or the inner layer split fluid is assembled again and axially fixed by being attached to the conical surface of the corresponding inner conical hole, the middle layer split fluid or the inner layer split fluid can be in thermal expansion with the working temperature, the middle layer split fluid is very difficult to disassemble next time, the axial dimension of the middle layer split fluid and the inner layer split fluid and the size of the inner layer split tube arranged on the middle layer split fluid can be still maintained relatively high, the axial dimension of the middle layer split fluid and the inner layer split fluid arranged on the inner layer split fluid can be prevented from affecting the axial interference fit, and the quality of the insulation cable is difficult to be guaranteed, and the problem of axial insulation cable is prevented from being axially and being set up and completely to be completely and completely deformed, and the quality an insulation problem of an insulation device can be difficult is difficult to be arranged and has been arranged placed on an axial position and has good quality placed on an insulation device is placed on a device is placed after an insulation device is arranged to a formed cable is formed.
According to a further preferred embodiment of the invention, the axial positioning adjusting device comprises an adjusting piece, the adjusting piece comprises a positioning end part and an adjusting screw rod part, an adjusting tenon groove is formed in the end face of the adjusting screw rod part, the adjusting screw rod part is axially screwed on a flange edge, a locking nut is screwed on the outer end of the adjusting screw rod part, grooves corresponding to the positioning end part and the locking nut are respectively formed in the two end faces of the flange edge, and the flange edge is arranged at the outer end of the middle-layer split body and the outer end of the inner-layer split body. According to the embodiment, the positioning end part can be in contact with the corresponding shell or middle-layer split body to limit the position of the middle-layer split body or the inner-layer split body, the adjusting screw part is screwed on the flange edge on the middle-layer split body or the inner-layer split body, the adjusting screw part can be rotated by the adjusting tongue-and-groove to change the axial position of the positioning end part and lock the adjusted correct position by the locking nut, and the adjusting piece and the locking nut can be positioned in the width range of the flange edge in the axial direction, so that the structure is compact, the adjustment is convenient, and the locking is reliable.
In another further preferred embodiment of the invention, the front end of the middle-layer split fluid is screwed with a reducing taper sleeve, and the middle-layer split fluid is screwed on the reducing taper sleeve. By adopting the embodiment, the manufacturing and processing of the middle-layer split fluid can be facilitated, the radial dimension change of the middle die sleeve and the middle-layer split fluid can be conveniently adapted, and the installation of the inner die sleeve is also facilitated.
In a still further preferred embodiment of the present invention, the spherical bearing pair is located at the front part of the inner die adjusting tube, and the concave spherical bearing part of the spherical bearing pair is disposed at the end part of the inner layer fluid. By adopting the embodiment, the supporting center of the spherical supporting pair is adjacent to the inner die sleeve, so that the adjusting precision of the center position of the inner die sleeve is improved, and the manufacturing of the concave spherical supporting part of the spherical supporting pair is also facilitated.
In a further preferred embodiment of the invention, the inner die sleeve is screwed on the front end of the inner die adjusting pipe, and an axial positioning adjusting washer is arranged between the inner die sleeve and the inner die adjusting pipe. By adopting the embodiment, the inner die sleeve can be conveniently replaced in different sizes, and the arranged axial positioning gasket can conveniently adjust the axial position of the inner die sleeve by adopting different thicknesses, so that the compact degree and the coating adhesive force of the inner insulating layer can be conveniently adjusted and controlled, and the cable quality is improved.
In another further preferred embodiment of the invention, an outer die fixing sleeve positioning sleeve is arranged between the outer die adjusting seat and the outer die fixing sleeve, the outer die fixing sleeve positioning sleeve is connected to the outer die adjusting seat in a screwed mode, an outer die sleeve positioning sleeve is arranged between the outer die fixing sleeve and the outer die sleeve, and the outer die sleeve positioning sleeve is connected to the outer die fixing sleeve in a screwed mode. By adopting the embodiment, the axial position of the outer die fixing sleeve can be conveniently adjusted by the positioning sleeve of the outer die fixing sleeve, and the axial position of the outer die sleeve can be conveniently adjusted by the positioning sleeve of the outer die sleeve, so that the flow area of the first annular cavity is convenient to adjust, and the cable quality is convenient to improve.
In a still further preferred embodiment of the invention, the rear end of the inner layer of split fluid is screwed with centering adjusting screws along the radial direction, at least three positioning adjusting screws are uniformly distributed along the circumferential direction, and the rear end of the inner mold adjusting pipe is fixedly connected with the inner layer of split fluid in a centering manner through the centering adjusting screws; and centering adjusting screws are screwed on the outer die adjusting seat along the radial direction, at least three positioning adjusting screws are uniformly distributed along the circumferential direction, and the outer die fixing sleeve is fixedly connected with the outer die adjusting seat in a centering manner through the centering adjusting screws. By adopting the embodiment, the central position of the rear end of the inner die adjusting pipe and the central position of the outer die fixing sleeve are convenient to adjust, and the inner die adjusting pipe is reliably fixed after adjustment.
Drawings
The adjustable core-coating extrusion head of the present invention is described in further detail below with reference to the drawings and specific examples.
FIG. 1 is a schematic illustration of one embodiment of an adjustable cable wrap extrusion head of the present invention;
FIG. 2 is an enlarged partial view of the portion of the feed switch spool in the configuration of FIG. 1;
fig. 3 is an enlarged view of a portion of the axial positioning adjustment device in the configuration of fig. 1.
In the figure: the mold comprises a 1-shell, a 2-outer mold adjusting seat, a 3-centering adjusting screw, a 4-outer layer fluid, a 5-outer mold sleeve, a 6-first annular cavity, a 7-outer mold sleeve positioning sleeve, a 8-second annular cavity, a 9-outer mold fixing sleeve positioning sleeve, a 10-inner mold sleeve, a 11-middle mold sleeve, a 12-outer mold fixing sleeve, a 13-diversion groove, a 14-outer connecting seat, a 15-outer feeding channel, a 16-outer feeding channel, a 17-feeding switching valve core, an 18-sealing gasket, a 19-reducing taper sleeve, a 20-spherical bearing pair, a 21-feeding channel, a 22-feeding channel, a 23-connecting seat, a 24-middle layer fluid, a 25-inner layer fluid, a 26-inner mold adjusting pipe, a 27-axial positioning adjusting device, a 28-adjusting pipe locking nut, a 29-axial positioning adjusting washer, a 30-heating unit, a 31-feeding main channel, a 32-bypass channel, a 33-adjusting piece, a 34-positioning end, a 35-adjusting screw part, a 36-flange edge, a 37-adjusting tongue groove and a 38-locking nut.
Detailed Description
In the adjustable cable cladding extrusion head shown in fig. 1, a casing 1 is a tubular member, an outer die adjusting seat 2 is installed at the front end of the casing 1, an outer layer split fluid 4 and a middle layer split fluid 24 are installed at the front end of the casing 1, inner layer split fluid 25 is installed in the casing 1 and the outer die adjusting seat 2, and a feeding channel 22 is arranged on the casing 1.
A connecting seat 23 is arranged on one side of the machine shell 1, the connecting seat 23 is fixedly connected with the machine shell 1 through a sealing gasket 18, two feeding channels 21 are arranged on the connecting seat 23, the axes of the feeding channels 21 are curved, the outlet ends of the two feeding channels 21 are respectively communicated with the corresponding feeding channels 22 on the machine shell 1, the axes of the inlet ends of the two feeding channels 21 are horizontally arranged, the axis of the inlet end of one feeding channel 21 is obliquely arranged towards the front end of the machine shell 1, and the axis of the inlet end of the other feeding channel 21 is obliquely arranged towards the rear end of the machine shell 1; an outer feeding channel 16 is arranged on the outer die adjusting seat 2, an outer connecting seat 14 is arranged on the outer die adjusting seat 2, the outer connecting seat 14 is fixedly connected with the outer die adjusting seat 2 through a sealing gasket 18, an outer feeding channel 15 is arranged on the outer connecting seat 14, and the outlet end of the outer feeding channel 15 is communicated with the outer feeding channel 16. As a preferred embodiment, the outer connecting seat 14 and the connecting seat 23 are arranged on the same side, the axis of the outer feeding channel 15 is a curve, the axis of the inlet end of the outer feeding channel 15 is inclined towards the front end of the outer die adjusting seat 2, and the included angle gamma between the axis of the inlet end of the outer feeding channel 15 and the axis of the shell 1 is 40-60 degrees; the included angle alpha between the axis of the inlet end of one feeding channel 21 and the axis of the machine shell 1 is 40-60 degrees, and the included angle beta between the axis of the inlet end of the other feeding channel 21 and the axis of the machine shell 1 is 40-60 degrees; the inlet ends of the feeding channel 21 and the outer feeding channel 15 can be communicated with the discharge ports of the corresponding extruders, and the two extruders are connected with the inlet ends of the two feeding channels 21 on the connecting seat 23 or with the inlet end of one feeding channel 21 on the connecting seat 23 and the inlet end of the outer feeding channel 15 on the outer connecting seat 14 through flanges.
A feed switching valve core 17 is arranged in each of the feed channel 21 and the outer feed channel 15, the feed switching valve core 17 is rotatably arranged on the connecting seat 23 or the outer connecting seat 14, the axis of the feed switching valve core 17 is perpendicular to the axis of the corresponding feed channel 21 or the axis of the corresponding outer feed channel 15, referring to fig. 2, a feed main channel 31 and a bypass channel 32 are arranged on the feed switching valve core 17, the feed main channel 31 traverses the feed switching valve core 17, the bypass channel 32 is arranged on the periphery of the feed switching valve core 17, the inlet end of the feed channel 21 is communicated with the outlet end of the feed channel 21 through the feed main channel 31, and the bypass channel 32 is opposite to the inlet end of the feed channel 21 by rotating the feed switching valve core 17 so that the inlet end of the feed channel 21 is communicated with the outside of the connecting seat 23 through the bypass channel 32; similarly, the inlet end of the outer feed passage 15 is connected to the outlet end of the outer feed passage 15 through the main feed passage 31, and rotating the feed switching spool 17 to make the bypass passage 32 opposite to the inlet end of the outer feed passage 15 allows the inlet end of the outer feed passage 15 to be connected to the outside of the outer connecting seat 14 through the bypass passage 32.
The middle layer of split fluid 24 is fixedly connected in the inner taper hole of the shell 1, the periphery of the middle layer of split fluid 24 is attached to the inner taper hole of the shell 1, an axial positioning and adjusting device 27 is arranged between the rear end of the middle layer of split fluid 24 and the shell 1, a middle die sleeve 11 is arranged at the front end of the middle layer of split fluid 24, the middle die sleeve 11 is screwed on the reducing taper sleeve 19, and the reducing taper sleeve 19 is screwed on the front end of the middle layer of split fluid 24; the inner layer of the split fluid 25 is arranged in an inner taper hole of the middle layer of the split fluid 24, the periphery of the inner layer of the split fluid 25 is attached to the inner taper hole of the middle layer of the split fluid 24, and an axial positioning and adjusting device 27 is also arranged between the rear end of the inner layer of the split fluid 25 and the middle layer of the split fluid 24; referring to fig. 3, as a preferred embodiment, the axial positioning adjusting device 27 includes an adjusting member 33, the adjusting member 33 includes a positioning end 34 and an adjusting screw portion 35, the diameter of the positioning end 34 is larger than that of the adjusting screw portion 35, an adjusting tongue groove 37 is provided on an end surface of the adjusting screw portion 35, the adjusting tongue groove 37 is used for inserting a wrench with corresponding tongue to drive the adjusting member 33 to rotate so as to adjust the axial position, the adjusting screw portion 35 is axially screwed on a flange edge 36, a locking nut 38 is screwed on an outer end of the adjusting screw portion 35 so as to lock the position of the adjusting member 33, grooves corresponding to the positioning end 34 and the locking nut 38 are respectively provided on two end surfaces of the flange edge 36, so that most of the positioning end 34 and the locking nut 38 are located in the grooves to make the structure more compact, the flange edge 36 is provided on an outer end of the middle layer of the split fluid 24 and an outer end of the inner layer of the split fluid 25, and the outer end surface of the positioning end 34 can contact with the corresponding outer end surface of the shell 1 or the split fluid 24 to define the installation position of the middle layer of the split fluid 24 or the inner layer 25.
An inner die adjusting pipe 26 is arranged in an inner hole of the inner layer split fluid 25 through a spherical bearing pair 20, the spherical bearing pair 20 is positioned at the front part of the inner die adjusting pipe 26, a concave spherical bearing part of the spherical bearing pair 20 is arranged at the end part of the inner layer split fluid 25, an inner die sleeve 10 is arranged at the front end of the inner die adjusting pipe 26, the inner die sleeve 10 is screwed at the front end of the inner die adjusting pipe 26, an axial positioning adjusting gasket 29 is arranged between the inner die sleeve 10 and the inner die adjusting pipe 26, and the axial position of the inner die sleeve 10 can be conveniently changed by adopting the axial positioning adjusting gaskets 29 with different thicknesses; the rear end of the inner die adjusting pipe 26 is fixedly connected with the inner layer split fluid 25 in a aligning manner, as a preferred embodiment, the rear end of the inner layer split fluid 25 is radially screwed with centering adjusting screws 3, at least three positioning adjusting screws 3 are uniformly distributed in the circumferential direction, the rear end of the inner die adjusting pipe 26 is fixedly connected with the inner layer split fluid 26 in a aligning manner through the centering adjusting screws 3, the rear end of the inner die adjusting pipe 26 is further screwed with a die adjusting pipe locking nut 28, and the inner die adjusting pipe 26 and the inner layer split fluid 25 can be axially clamped and fixedly connected through the spherical bearing pair 20 by screwing the die adjusting pipe locking nut 28, so that the inner die adjusting pipe 26 and the inner layer split fluid 25 are further ensured to be fixedly connected after aligning.
The outer-layer split fluid 4 is movably inserted into an inner hole of the outer die adjusting seat 2 along the axial direction, an outer die fixing sleeve 12 is arranged at the outer end of the outer-layer split fluid 4, the outer-layer split fluid 4 is pushed out outwards under the pressure of an insulating coating material flowing through an inner taper hole of the outer-layer split fluid 4 to enable the outer end face of the outer-layer split fluid to be attached to the inner end face of the outer die fixing sleeve 12, the outer die fixing sleeve 12 is fixedly connected with the outer die adjusting seat 2 in an aligning manner, and as a preferred embodiment, centering adjusting screws 3 are screwed on the outer die adjusting seat 2 along the radial direction, at least three positioning adjusting screws 3 are uniformly distributed along the circumferential direction, and the outer die fixing sleeve 12 is fixedly connected with the outer die adjusting seat 2 in an aligning manner through the centering adjusting screws 3. A positioning sleeve 9 for an outer die fixing sleeve is arranged between the outer die adjusting seat 2 and the outer die fixing sleeve 12, the positioning sleeve 9 for the outer die fixing sleeve is screwed on the outer die adjusting seat 2, and the axial position of the outer die fixing sleeve 12 can be adjusted by rotating the positioning sleeve 9 for the outer die fixing sleeve; an outer die sleeve 5 is arranged in an inner hole of the outer die fixing sleeve 12, an outer die sleeve positioning sleeve 7 is arranged between the outer die fixing sleeve 12 and the outer die sleeve 5, the outer die sleeve positioning sleeve 7 is screwed on the outer die fixing sleeve 12, and the axial position of the outer die sleeve 5 can be adjusted by rotating the outer die sleeve positioning sleeve 7.
A first annular cavity 6 is arranged between the outer die sleeve 5 and the middle die sleeve 11, the first annular cavity 6 is communicated with a splitter box 13 on a middle-layer split fluid 24, the splitter box 13 on the middle-layer split fluid 24 is communicated with a corresponding feeding channel 22 arranged on the shell 1, the first annular cavity 6 is also communicated with a splitter box 13 on an outer-layer split fluid 4, the splitter box 13 on the outer-layer split fluid 4 is communicated with an outer feeding channel 16 arranged on the outer die adjusting die holder 2, a second annular cavity 8 is arranged between the middle die sleeve 11 and the inner die sleeve 10, the second annular cavity 8 is communicated with a splitter box 13 on an inner-layer split fluid 25, and the splitter box 13 on the inner-layer split fluid 25 is communicated with a corresponding feeding channel 22 on the shell 1 through a through hole on the wall of the middle-layer split fluid 24.
A plurality of groups of heating units 30 are circumferentially distributed in the casing 1, and each group of heating units 30 is correspondingly provided with at least one temperature sensor (not shown in the figure).
The foregoing is merely illustrative of some preferred embodiments of the present invention, but the invention is not limited thereto and many modifications and variations are possible. If the outer connecting seat 14 is not installed on the same side as the connecting seat 23, the outer die holder 2 may be rotated by 90 degrees to position the outer connecting seat 14 above, and the outer connecting seat 14 is connected with the third extruder, so that the production of the three-layer insulated cable can be realized; instead of the adjusting element 33 having the positioning end 34 and the adjusting screw 35, the axial positioning adjusting device 27 may be a universal standard screw screwed directly onto the flange 36 instead of the adjusting element 33, and the axial positioning adjusting device 27 may be a positioning sleeve screwed onto the flange 36. Such and the like, as long as the modifications and the changes are made on the basis of the basic principles of the present invention, are to be regarded as falling within the scope of the present invention.
Claims (7)
1. The utility model provides an adjustable cable cladding extrusion head, includes casing (1), outer branch fluid (4), middle level branch fluid (24), inlayer branch fluid (25) and sets up feed channel (22) on casing (1), installs external mold die holder (2), its characterized in that at the front end of casing (1): a connecting seat (23) is arranged on the machine shell (1), two feeding channels (21) are arranged on the connecting seat (23), the outlet ends of the two feeding channels (21) are respectively communicated with corresponding feeding channels (22) on the machine shell (1), the axis of the inlet end of one feeding channel (21) is obliquely arranged towards the front end of the machine shell (1), and the axis of the inlet end of the other feeding channel (21) is obliquely arranged towards the rear end of the machine shell (1); an outer feeding channel (16) is formed in the outer die adjusting seat (2), an outer connecting seat (14) is formed in the outer die adjusting seat (2), an outer feeding channel (15) is formed in the outer connecting seat (14), and the outlet end of the outer feeding channel (15) is communicated with the outer feeding channel (16); the middle layer split fluid (24) is fixedly connected in an inner taper hole of the shell (1), a middle die sleeve (11) is arranged at the front end of the middle layer split fluid (24), the inner layer split fluid (25) is arranged in the inner taper hole of the middle layer split fluid (24), an inner die adjusting pipe (26) is arranged in an inner hole of the inner layer split fluid (25) through a spherical bearing pair (20), an inner die sleeve (10) is arranged at the front end of the inner die adjusting pipe (26), and the rear end of the inner die adjusting pipe (26) is fixedly connected with the inner layer split fluid (25) in an aligning manner; the outer-layer split fluid (4) is movably inserted into an inner hole of the outer-mold die-adjusting seat (2) along the axial direction, an outer-mold fixing sleeve (12) is arranged at the outer end of the outer-layer split fluid (4), the outer-mold fixing sleeve (12) is fixedly connected with the outer-mold die-adjusting seat (2) in an aligning manner, and an outer-mold sleeve (5) is arranged in the inner hole of the outer-mold fixing sleeve (12); a first annular cavity (6) is arranged between the outer die sleeve (5) and the middle die sleeve (11), the first annular cavity (6) is communicated with a shunt groove (13) on the middle die split body (24), the shunt groove (13) on the middle die split body (24) is communicated with a corresponding feeding channel (22) arranged on the shell (1), the first annular cavity (6) is also communicated with a shunt groove (13) on the outer die split body (4), the shunt groove (13) on the outer die split body (4) is communicated with an outer feeding channel (16) arranged on the outer die adjusting die seat (2), a second annular cavity (8) is arranged between the middle die sleeve (11) and the inner die sleeve (10), the second annular cavity (8) is communicated with the shunt groove (13) on the inner die split body (25), and the shunt groove (13) on the inner die split body (25) is communicated with a corresponding feeding channel (22) on the shell (1) through a through hole on the wall of the middle die split body (24); a plurality of heating units (30) are circumferentially distributed in the shell (1), and each group of heating units (30) is correspondingly provided with at least one temperature sensor; a feeding switching valve core (17) is arranged in each of the feeding channel (21) and the outer feeding channel (15), a feeding main channel (31) and a bypass channel (32) are arranged on each feeding switching valve core (17), the inlet end of each feeding channel (21) is communicated with the outlet end of each feeding channel (21) through the corresponding feeding main channel (31), the inlet end of each feeding channel (21) can be communicated with the outside of the corresponding connecting seat (23) through the corresponding bypass channel (32), the inlet end of each outer feeding channel (15) is communicated with the outlet end of each outer feeding channel (15) through the corresponding feeding main channel (31), and the inlet end of each outer feeding channel (15) can be communicated with the outside of the corresponding outer connecting seat (14) through the corresponding bypass channel (32); the included angle alpha between the axis of the inlet end of the first feeding channel (21) and the axis of the machine shell (1) is 40-60 degrees, and the included angle beta between the axis of the inlet end of the other feeding channel (21) and the axis of the machine shell (1) is 40-60 degrees; the axis of the inlet end of the outer feeding channel (15) is obliquely arranged towards the front end of the outer die adjusting seat (2), and the included angle gamma between the axis of the inlet end of the outer feeding channel (15) and the axis of the shell (1) is 40-60 degrees; the periphery of the middle layer of split fluid (24) is attached to an inner taper hole of the shell (1), an axial positioning adjusting device (27) is arranged between the rear end of the middle layer of split fluid (24) and the shell (1), the periphery of the inner layer of split fluid (25) is attached to the inner taper hole of the middle layer of split fluid (24), and an axial positioning adjusting device (27) is arranged between the rear end of the inner layer of split fluid (25) and the middle layer of split fluid (24).
2. The adjustable cable cladding extrusion head of claim 1, wherein: the axial positioning adjusting device (27) comprises an adjusting piece (33), the adjusting piece (33) comprises a positioning end part (34) and an adjusting screw rod part (35), an adjusting tenon groove (37) is formed in the end face of the adjusting screw rod part (35), the adjusting screw rod part (35) is axially screwed on a flange edge (36), a locking nut (38) is screwed at the outer end of the adjusting screw rod part (35), grooves corresponding to the positioning end part (34) and the locking nut (38) are formed in the two end faces of the flange edge (36) respectively, and the flange edge (36) is arranged at the outer end of the middle-layer split body (24) and the outer end of the inner-layer split body (25).
3. The adjustable cable cladding extrusion head of claim 1, wherein: the front end of the middle-layer split fluid (24) is screwed with a reducing taper sleeve (19), and the middle die sleeve (11) is screwed on the reducing taper sleeve (19).
4. The adjustable cable cladding extrusion head of claim 1, wherein: the spherical bearing pair (20) is positioned at the front part of the internal mold adjusting pipe (26), and the concave spherical bearing part of the spherical bearing pair (20) is arranged at the end part of the internal layer partial fluid (25).
5. The adjustable cable cladding extrusion head of claim 1, wherein: the inner die sleeve (10) is screwed at the front end of the inner die adjusting pipe (26), and an axial positioning adjusting gasket (29) is arranged between the inner die sleeve (10) and the inner die adjusting pipe (26).
6. The adjustable cable cladding extrusion head of claim 1, wherein: an outer die fixing sleeve positioning sleeve (9) is arranged between the outer die adjusting seat (2) and the outer die fixing sleeve (12), the outer die fixing sleeve positioning sleeve (9) is screwed on the outer die adjusting seat (2), an outer die sleeve positioning sleeve (7) is arranged between the outer die fixing sleeve (12) and the outer die sleeve (5), and the outer die sleeve positioning sleeve (7) is screwed on the outer die fixing sleeve (12).
7. The adjustable cable cladding extrusion head of claim 1, wherein: the rear end of the inner layer split fluid (25) is radially screwed with centering adjusting screws (3), at least three positioning adjusting screws (3) are uniformly distributed along the circumferential direction, and the rear end of the inner mold adjusting pipe (26) is fixedly connected with the inner layer split fluid (25) in a centering manner through the centering adjusting screws (3); the outer die adjusting seat (2) is radially screwed with centering adjusting screws (3), at least three positioning adjusting screws (3) are uniformly distributed along the circumferential direction, and the outer die fixing sleeve (12) is fixedly connected with the outer die adjusting seat (2) in an aligning manner through the centering adjusting screws (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111055159.XA CN113744937B (en) | 2021-09-09 | 2021-09-09 | Adjustable extrusion head for cladding cable |
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| CN202111055159.XA CN113744937B (en) | 2021-09-09 | 2021-09-09 | Adjustable extrusion head for cladding cable |
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| CN113744937B true CN113744937B (en) | 2023-06-20 |
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| CN116487126B (en) * | 2023-04-27 | 2024-02-06 | 重庆市川捷电子有限公司 | Novel automatic production line for data cables |
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