CN116587567A - Double-deck cable insulation layer extruder head that extrudes altogether of inlayer polychrome strip - Google Patents

Abstract

The application provides an extruder head for an inner multi-color strip double-layer co-extrusion cable insulation layer, which relates to the field of cable processing equipment and comprises a first extrusion assembly, a second extrusion assembly and a temperature control assembly; the first extrusion assembly is internally provided with a first incoming line channel, an inner layer sizing material channel and a color bar sizing material channel, the inner layer sizing material channel is connected with an inner layer pumping device, the color bar sizing material channel is connected with the color bar pumping device, and discharge ports of the inner layer sizing material channel and the color bar sizing material channel are both arranged at the outlet end of the first incoming line channel; a second inlet wire channel and an outer layer sizing material channel are arranged in the second extrusion assembly, the outer layer sizing material channel is connected with an outer layer pumping device, and a discharge hole of the outer layer sizing material channel is arranged at the inlet end of the second inlet wire channel; the temperature control assembly is arranged between the outlet end of the first inlet channel and the inlet end of the second inlet channel and is suitable for heating each sizing material channel at different temperatures. The application has the advantages of compact structure and difficult layering of the insulating wire of the produced product.

Description

Double-deck cable insulation layer extruder head that extrudes altogether of inlayer polychrome strip

Technical Field

The application belongs to the field of cable processing equipment, and particularly relates to an extrusion machine head for an inner layer multicolor strip double-layer co-extrusion cable insulation layer.

Background

The cable insulation extruder head is a tool for coating a metal wire with an insulation layer, and is usually used for extruding an insulation material such as polyethylene or polyvinyl chloride after hot melting so as to cover the surface of the metal wire.

With the development of cable production, some cables now cover two insulating layers, wherein the inner layer is insulated by using multi-color strips to meet the requirement of multi-core occasion distinction, and the outer layer is usually made of more wear-resistant, corrosion-resistant and self-lubricating materials so that the cable has longer service life.

In the prior art, in order to realize the coating of two insulating layers on a cable, two sets of extruder heads are generally used for extruding twice, but the quality problems of poor combination and easy layering of the two insulating layers are easily caused by extruding twice, and the cost is increased by adding one procedure.

In view of this, it would be desirable to provide an inner multi-color strip double layer co-extruded cable insulation extruder head.

Disclosure of Invention

In order to overcome the defects, the application provides an extruder head for extruding an insulating layer of an inner multi-color strip double-layer co-extruded cable.

The application provides an extruder head for an inner multi-color strip double-layer co-extrusion cable insulation layer, which adopts the following technical scheme.

An inner multi-color strip double-layer co-extrusion cable insulation layer extruder head comprises a first extrusion assembly, a second extrusion assembly and a temperature control assembly; a first inlet wire channel and an inner layer sizing material channel which are suitable for a wire to pass through are arranged in the first extrusion assembly, the inner layer sizing material channel is connected with an inner layer pumping device, and a discharge port of the inner layer sizing material channel is arranged at the outlet end of the first inlet wire channel; a second inlet wire channel and an outer layer sizing material channel which are suitable for the lead to pass through are arranged in the second extrusion assembly, the outer layer sizing material channel is connected with an outer layer pumping device, and a discharge port of the outer layer sizing material channel is arranged at the inlet end of the second inlet wire channel; the temperature control assembly is arranged between the outlet end of the first inlet wire channel and the inlet end of the second inlet wire channel, and is suitable for heating the inner layer sizing material channel and the outer layer sizing material channel at different temperatures.

Through adopting above-mentioned technical scheme, the first subassembly that extrudes is suitable for extruding the inlayer insulating layer, the second is extruded the subassembly and is suitable for extruding the outer insulating layer, it is connected with the first subassembly that extrudes with the second subassembly that extrudes, and set up the control by temperature change subassembly in the junction between them, and the outer sizing material passageway that extrudes inlayer insulating layer is heated with different temperatures respectively through the control by temperature change subassembly, thereby can make the wire after being covered with inlayer insulating layer, just be covered with outer insulating layer under the not solidified state of inlayer insulating layer, thereby can make the adhesion that inside and outside two-layer insulating layer can be better be in the same place, the poor layering of the poor easy layering of bondability of difficult appearance, the quality of the cable of output is higher.

Specifically, the first extrusion assembly further comprises a color bar sizing material channel, an inner layer sizing material splitting unit, a color bar splitting piece and a first extrusion machine body, wherein the color bar sizing material channel is connected with a color bar pumping device, and a discharge port of the color bar sizing material channel is communicated with the inner layer sizing material channel; the inner layer splitting unit is internally provided with the first incoming line channel, the color bar splitting piece is sleeved on the inner layer splitting unit, and the inner layer sizing material channel is formed between the color bar splitting piece and the inner layer splitting unit; the first extruder body is sleeved on the color bar dividing piece, and a color bar sizing material channel is formed between the first extruder body and the color bar dividing piece.

By adopting the technical scheme, the inner color bars can be formed on the inner insulating layer.

Specifically, inlayer reposition of redundant personnel unit includes inlayer shunt, inlayer shunt includes inlayer reposition of redundant personnel big footpath section and inlayer reposition of redundant personnel path section, the tip of the one end that inlayer reposition of redundant personnel big footpath section place is equipped with inlayer shunt flange ring, just be equipped with inlayer spread groove on the inlayer reposition of redundant personnel big footpath section, the discharge gate in inlayer spread groove is located inlayer reposition of redundant personnel big footpath section with the junction of inlayer reposition of redundant personnel path section.

By adopting the technical scheme, the inner insulating layer with the annular cross section can be extruded from the inner shunt small-diameter section, so that the wire can be well wrapped.

Specifically, the inner-layer split-flow unit further comprises a ball head core tube, a mold core, a spherical ring, a core tube parallel cap and a plurality of core tube adjusting bolts; the inner-layer flow divider is provided with an axial core tube accommodating cavity penetrating through the inner-layer flow divider, a limiting convex ring is arranged at a port of the core tube accommodating cavity, which is positioned at the flange ring of the inner-layer flow divider, the limiting convex ring protrudes towards a direction perpendicular to the end face of the flange ring of the inner-layer flow divider so as to form a cap accommodating cavity which is suitable for accommodating the core tube and is capped, and a plurality of core tube adjusting threaded holes penetrating through the side wall and capable of being matched with the core tube adjusting bolts are arranged on the side wall of the limiting convex ring; the ball head core pipe is arranged in the core pipe accommodating cavity, one end of the ball head core pipe is provided with a ball head abutting part for abutting with a port of the core pipe accommodating cavity, which is positioned at the inner-layer split small-diameter section, through the ball head abutting part, the other end of the ball head core pipe is connected with the core pipe parallel cap, the core pipe parallel cap is arranged in the parallel cap accommodating cavity, the spherical ring is arranged between the core pipe parallel cap and the end face of the inner-layer splitter flange ring, and the core pipe adjusting bolt can penetrate through the core pipe adjusting threaded hole to abut with the core pipe parallel cap; and a containing cavity suitable for containing the mold core is formed in the ball head abutting part, and the first wire inlet channel penetrates through the mold core and the axial direction of the ball head core tube.

By adopting the technical scheme, the state of the ball core pipe can be adjusted by screwing the core pipe adjusting bolts, so that the thickness uniformity of the extruded inner insulating layer can be ensured.

Specifically, the color bar branching piece includes color bar branching big diameter section and color bar branching small diameter section, the tip of the one end that color bar branching big diameter section place is equipped with color bar branching flange ring, just be equipped with color bar splitter box and inlayer reposition of redundant personnel feed hole on the color bar branching big diameter section, the discharge gate of color bar splitter box is located color bar branching big diameter section with the junction of color bar branching small diameter section, keep away from on the color bar branching small diameter section the one end of color bar branching big diameter section is equipped with keeps off the ring, keep off the ring with the junction of color bar branching small diameter section be equipped with run through in color bar branching small diameter section's lateral wall and follow color bar branching small diameter section's circumference is arranged a plurality of color bar shaping holes, each color bar shaping hole all with inlayer sizing material passageway connection, inlayer reposition of redundant personnel feed hole with the feed inlet of inlayer splitter box is connected.

Through adopting above-mentioned technical scheme, can form inlayer color bar on the inlayer insulating layer, and can realize the feed to inlayer splitter box.

Specifically, the first extruder body comprises a body and a body heating sleeve, and the body heating sleeve is sleeved on the body; the color bar split-flow type color bar distributor is characterized in that a first feeding hole and a second feeding hole are formed in the body, the first feeding hole is communicated with the color bar split-flow groove, the second feeding hole is communicated with the inner layer split-flow feeding hole, and a connecting hole matched with the color bar splitter flange ring and the inner layer splitter flange ring is further formed in the body.

Through adopting above-mentioned technical scheme, can realize the feed to inlayer splitter box and color bar splitter box, and can realize the heating to the part in the first extrusion subassembly, can avoid inlayer sizing material passageway and color bar sizing material passageway to appear blocking up the condition.

Further, the second extrusion assembly further comprises an outer layer shunting unit and a second machine body, the second inlet wire channel is formed in the outer layer shunting unit, the second machine body is sleeved on the outer layer shunting unit, and the outer layer sizing material channel is formed between the second machine body and the outer layer shunting unit.

By adopting the technical scheme, the outer insulating layer can be extruded.

Specifically, the outer layer shunt unit comprises an outer layer shunt piece, a die sleeve and a die sleeve cap; the outer shunt piece includes outer reposition of redundant personnel major diameter section, outer reposition of redundant personnel minor diameter section and locates outer splitter box on the outer reposition of redundant personnel major diameter section, the discharge gate of outer splitter box is located outer reposition of redundant personnel major diameter section with the junction of outer reposition of redundant personnel minor diameter section, still be formed with the internal thread regulation hole in the outer shunt piece, the die sleeve with die sleeve and cap all can be placed in the internal thread regulation hole, just be equipped with on the die sleeve and the cap with internal thread regulation hole assorted external screw thread structure, the second inlet wire passageway run through in the die sleeve with the axis direction of die sleeve and cap, just the die sleeve is in the entry end department of second inlet wire passageway.

Through adopting above-mentioned technical scheme, can realize the regulation of the whole thickness of outer insulating layer through the regulation of die sleeve and cap to can make the difficult discontinuous condition of damage appear in outer insulating layer.

Specifically, the second machine body comprises a second machine body, a calibration ring, a plurality of calibration bolts and a second machine body heating sleeve, wherein the second machine body heating sleeve is sleeved on the second machine body; the two machine body is provided with an outer layer feeding hole and a plurality of calibration holes, and the outer layer feeding hole is communicated with the outer layer sizing material channel; the calibration hole corresponds to the outer-layer split-flow small-diameter section, the calibration ring is sleeved at the outer-layer split-flow small-diameter section, one face of the calibration ring is abutted to the two machine body bodies, the other face of the calibration ring is abutted to the temperature control assembly, and a plurality of calibration bolts are suitable for penetrating through the calibration hole and abutted to the calibration ring.

Through adopting above-mentioned technical scheme, twist a plurality of calibration bolts and can realize the regulation of the position of calibration ring for the thickness of outer insulating layer is more even.

Further, the temperature control assembly comprises a heating sleeve and a pipeline unit, the heating sleeve comprises a first heating cavity and a second heating cavity, the pipeline unit comprises a first heating medium inflow pipe, a first heating medium outflow pipe, a second heating medium inflow pipe and a second heating medium outflow pipe, the first heating medium inflow pipe and the first heating medium outflow pipe are communicated with the first heating cavity, the first heating cavity is suitable for heating the inner layer sizing material channel and the color bar sizing material channel, and the second heating cavity is arranged for heating the outer layer sizing material channel.

Through adopting above-mentioned technical scheme for the control by temperature change subassembly can carry out corresponding heating or heat preservation to two kinds of materials that constitute inlayer insulating layer and outer insulating layer, thereby can guarantee the whole quality of insulating layer.

In summary, the application has the following beneficial technical effects:

the first extrusion assembly is suitable for extruding an inner insulating layer, the second extrusion assembly is suitable for extruding an outer insulating layer, the first extrusion assembly is connected with the second extrusion assembly, a temperature control assembly is arranged at the joint of the first extrusion assembly and the second extrusion assembly, and the inner sizing material channel for extruding the inner insulating layer and the outer sizing material channel for extruding the outer insulating layer are heated at different temperatures through the temperature control assembly respectively, so that the wire is coated with the outer insulating layer in a state that the inner insulating layer is not completely solidified after being coated with the inner insulating layer, the inner insulating layer and the outer insulating layer can be better adhered together, the situation that the combination property is poor and layering is easy to occur is difficult to occur, and the quality of a produced cable is higher;

the inner multi-color strip double-layer co-extrusion cable insulation layer extruder head is compact in structure and capable of extruding two layers of insulation layers at one time, so that two cable insulation layer extruders which can only extrude a single-layer insulation layer can be completed by only one inner multi-color strip double-layer co-extrusion cable insulation layer extruder head, and therefore cost can be saved and flat production efficiency can be improved.

Drawings

FIG. 1 is an exploded view of an inner multi-color stripe double layer co-extruded cable insulation extruder head of the present application.

Fig. 2 is a cross-sectional view of the inner multi-color bar double-layer co-extruded cable insulation extruder head of the present application taken along its own axis.

Fig. 3 is a schematic cross-sectional view of a cable produced by the inner multi-color bar double layer co-extruded cable insulation extruder head of the present application.

Fig. 4 is a cross-sectional view of the temperature control assembly of the inner multi-color bar double-layer co-extruded cable insulation extruder head of the present application taken along its own axis.

Fig. 5 is a schematic perspective view of an inner layer shunt unit in an inner layer multi-color bar double-layer co-extrusion cable insulation layer extruder head of the present application.

Fig. 6 is a cross-sectional view of the inner layer split unit in the inner layer multi-color bar double layer co-extruded cable insulation extruder head of the present application along its own axis.

Fig. 7 is a schematic perspective view of a color bar splitter in an inner multi-color bar double-layer co-extruded cable insulation extruder head of the present application.

Fig. 8 is a cross-sectional view of the color bar splitter in the inner multi-color bar double-layer co-extruded cable insulation extruder head of the present application along its own axis.

Fig. 9 is a cross-sectional view taken along the direction A-A in fig. 8.

Fig. 10 is a schematic perspective view of an outer shunt in the extruder head of the inner multi-color bar double-layer co-extruded cable insulation layer of the present application.

Reference numerals: 1. a first extrusion assembly; 11. a first incoming line channel; 12. an inner layer sizing material channel; 13. color bar sizing material channels; 14. an inner layer shunt unit; 141. an inner layer shunt; 1411. the inner layer is divided into large-diameter sections; 1412. the inner layer shunts the small-diameter section; 1413. an inner layer diverter flange ring; 1414. a limit convex ring; 1415. an inner layer shunt groove; 142. a ball core tube; 1421. a ball head abutting portion; 143. a mold core; 144. a spherical ring; 145. the core tube is covered; 146. core tube adjusting bolts; 15. color bar branching piece; 151. color bar split large diameter section; 152. color bar split small diameter section; 1521. a stop ring; 1522. a color bar forming hole; 153. a color stripe diverter flange ring; 154. color bar shunt grooves; 155. an inner layer diversion feed hole; 16. a first extruder body; 161. a body; 1611. a first feed hole; 1612. a second feed hole; 162. a body heating jacket; 2. a second extrusion assembly; 21. a second incoming line channel; 22. an outer layer sizing material channel; 23. an outer layer shunt unit; 231. an outer layer shunt; 2311. the outer layer is divided into large-diameter sections; 2312. the outer layer is divided into small-diameter sections; 2313. an outer layer shunt groove; 2314. an internal thread adjusting hole; 232. a die sleeve; 233. sleeving a die sleeve and capping; 24. a second body; 241. two body bodies; 2411. an outer layer feed hole; 242. a calibration ring; 243. calibrating a bolt; 244. a second body heating jacket; 3. a temperature control assembly; 31. heating the sleeve; 311. a first heating chamber; 312. a second heating chamber; 32. a pipe unit; 321. a first heat medium inflow pipe; 322. a first heating medium outflow pipe; 323. a second heat medium inflow pipe; 324. a second heat medium outflow pipe; 4. a wire; 41. an inner insulating layer; 42. an inner color bar; 43. and an outer insulating layer.

Detailed Description

The application is described in further detail below with reference to fig. 1-10.

The application discloses an extruder head for an inner multi-color strip double-layer co-extrusion cable insulation layer.

Referring to fig. 1 and 2, an inner multi-color strip double-layer co-extrusion cable insulation extruder head comprises a first extrusion assembly 1, a second extrusion assembly 2 and a temperature control assembly 3; wherein a first wire inlet channel 11 and an inner layer sizing material channel 12 are arranged in the first extrusion assembly 1, the wire 4 can pass through the first wire inlet channel 11, the inner layer sizing material channel 12 is connected with an inner layer pumping device (not shown in the figure) so as to be capable of supplying inner layer sizing material, such as PVC (polyvinyl chloride) or PE (polyethylene) material, for forming an inner layer insulating layer 41 into the inner layer sizing material channel 12, and a discharge hole of the inner layer sizing material channel 12 is arranged at an outlet end of the first wire inlet channel 11; the second extrusion assembly 2 is provided with a second inlet channel 21 and an outer layer glue channel 22, through which the wire 4 can pass through the second inlet channel 21, the outer layer glue channel 22 being connected to an outer layer pumping device (not shown in the figure) for feeding an outer layer glue, such as nylon material, for forming an outer layer insulation layer 43 into the outer layer glue channel 22, and a discharge opening of the outer layer glue channel 22 being provided at an inlet end of the second inlet channel 21.

As shown in fig. 2 and 3, in the production process, the wires 4 first pass through the outlet end of the first wire inlet channel 11 and cover the inner insulating layer 41 when passing through the outlet end of the first wire inlet channel 11, then, the wires 4 pass through the inlet end of the second wire inlet channel 21 and cover the outer insulating layer 43 when passing through the inlet end of the second wire inlet channel 21, and it should be noted that in the production process, the inner layer sizing material in the inner layer sizing material channel 12 and the outer layer sizing material in the outer layer sizing material channel 22 need to be guaranteed to be in a flowable state, therefore, a temperature control assembly 3 can be arranged between the outlet end of the first wire inlet channel 11 and the inlet end of the second wire inlet channel 21, so that the inner layer sizing material channel 12 and the outer layer sizing material channel 22 can be heated at different temperatures by the temperature control assembly 3, so as to ensure that the inner layer sizing material and the outer layer sizing material can be in a proper temperature keeping flowing state, and the state of the other can not be influenced, and taking the inner layer sizing material as PVC or PE material as an example, the temperature of the temperature control assembly 3 can control the inner layer sizing material to be heated at 150 ℃ to 180 ℃ to 250 ℃ or the outer layer sizing material to be heated at the temperature of the outer layer of between 180 ℃ and 300 ℃.

According to the design, different materials can be heated or insulated at different temperatures, so that insulating materials are easy to extrude, after the wires 4 are covered with the inner insulating layer 41, the outer insulating layer 43 is covered in a short time under the state that the inner insulating layer 41 is not completely cured, so that the inner insulating layer and the outer insulating layer can be better adhered together, the situation that the combination property is poor and layering is easy to occur is difficult to occur, the produced cable is higher in quality, the inner multi-color-strip double-layer co-extrusion cable insulating layer extruder head is compact in structure, two insulating layers can be extruded at one time, and therefore, the operation of two cable insulating layer extruders which can only extrude a single-layer insulating layer can be completed only by only needing one inner multi-color-strip double-layer co-extrusion cable insulating layer extruder head can be completed, and therefore, the cost can be saved and the flat production efficiency can be improved.

Specifically, referring to fig. 4, in one embodiment of the inner multi-color bar double-layer co-extrusion cable insulation extruder head of the present application, the temperature control assembly 3 is provided to include a heating sleeve 31 and a pipe unit 32, the heating sleeve 31 includes a first heating chamber 311 and a second heating chamber 312, the pipe unit 32 includes a first heat medium inflow pipe 321, a first heat medium outflow pipe 322, a second heat medium inflow pipe 323 and a second heat medium outflow pipe 324, the first heat medium inflow pipe 321 and the first heat medium outflow pipe 322 are in communication with the first heating chamber 311, and the first heating chamber 311 is adapted to heat the inner rubber channel 12 and the color bar rubber channel 13, and the second heating chamber 312 is provided to heat the outer rubber channel 22.

As shown in fig. 2 and 4, the heating sleeve 31 may be configured as a section of concave conical surface with a recess toward the inside of the heating sleeve 31, and the other end is configured with a convex conical surface protruding toward the outside of the heating sleeve 31, so that the inner layer rubber channel 12 can be formed by matching the concave conical surface with the first extrusion assembly 1, and the outer layer rubber channel 22 can be formed by matching the convex conical surface with the second extrusion assembly 2, so that the extruded inner layer insulation layer 41 can perform good cladding connection on the conductive wire 4, and the extruded outer layer insulation layer 43 can perform good cladding connection on the inner layer insulation layer 41.

Further, referring to fig. 2 and 3, in an embodiment of the inner multi-color strip double-layer co-extrusion cable insulation extruder head of the present application, the first extrusion assembly 1 further includes a color strip glue channel 13, an inner splitting unit 14, a color strip splitting member 15 and a first extruder body 16, where the color strip glue channel 13 is connected with a color strip pump (not shown in the drawing) so as to be capable of supplying a color glue into the color strip glue channel 13 (the color glue is the same as the inner glue described above, and is a PVC or PE material, only a pigment is added in the color glue so that the color of the color glue is inconsistent with that of the inner glue), and a discharge port of the color strip glue channel 13 is communicated with the inner glue channel 12 so as to be capable of extruding from the inner glue channel 12 after mixing the color glue with the inner glue, thereby forming an inner color strip 42, and the color glue after mixing is formed into a whole in the inner glue channel 12 so as to ensure that the color glue is not liable to be layered in the inner glue channel 12, and the color glue is liable to be blocked when the color glue is mixed with the inner glue is formed into a finer than the inner glue channel 42, and the color strip is liable to be deformed when the color strip is mixed with the inner glue channel 13.

As shown in fig. 2 and 5, the first extruding assembly 1 may be configured to form a first inlet channel 11 in the inner layer splitting unit 14, a color stripe splitting member 15 sleeved on the inner layer splitting unit 14, and form an inner layer sizing channel 12 between the color stripe splitting member 15 and the inner layer splitting unit 14, and a first extruding body 16 sleeved on the color stripe splitting member 15, and form a color stripe sizing channel 13 between the first extruding body 16 and the color stripe splitting member 15.

Specifically, as shown in fig. 5 and 6, the inner layer shunt unit 14 may be configured to include an inner layer shunt 141, where the inner layer shunt 141 may be configured to include an inner layer shunt large-diameter section 1411 and an inner layer shunt small-diameter section 1412, where the inner layer shunt large-diameter section 1411 is located, the end portion of one end where the inner layer shunt large-diameter section 1411 is located is provided with an inner layer shunt flange ring 1413, and the inner layer shunt large-diameter section 1411 is provided with an inner layer shunt groove 1415, a discharge port of the inner layer shunt groove 1415 is formed at a connection portion between the inner layer shunt large-diameter section 1411 and the inner layer shunt small-diameter section 1412, and as shown in fig. 5, the inner layer shunt groove 1415 may be configured to be provided with an inner layer shunt protrusion structure extending in an axial direction of the inner layer shunt 141 in an area thereof for shunting inner layer glue stock, and the inner layer shunt protrusion structure is started from the inner layer shunt large-diameter section 1411, and when the total length of the inner layer shunt large-diameter section 1411 reaches a half of the circumference of the inner layer shunt large-diameter section 1411, the inner layer shunt groove 1415, that is located along the axial direction of the inner layer shunt large-diameter section 1411, and the inner layer shunt groove 1415 can be completely extruded from the inner layer shunt groove 1412, and the whole inner layer shunt groove 1415 can be ensured to be completely and completely extruded from the inner layer shunt structure 1412.

As shown in fig. 5 and 6, the inner layer split unit 14 further includes a bulb core tube 142, a mold core 143, a spherical ring 144, a core tube union cap 145, and a plurality of core tube adjustment bolts 146 (e.g., four); the inner-layer diverter 141 is formed with a core pipe accommodating cavity penetrating through the axial direction of the inner-layer diverter 141, a limiting convex ring 1414 is arranged at a port of the core pipe accommodating cavity, which is positioned at the inner-layer diverter flange ring 1413, the limiting convex ring 1414 is arranged to protrude towards the direction perpendicular to the end face of the inner-layer diverter flange ring 1413 so as to form a cap accommodating cavity suitable for accommodating the core pipe and cap 145, and a plurality of core pipe adjusting threaded holes (for example, four core pipe adjusting threaded holes penetrating through the side wall and capable of being matched with the core pipe adjusting bolts 146 are arranged on the side wall of the limiting convex ring 1414.

The bulb core pipe 142 is arranged in the core pipe accommodating cavity, and the bulb core pipe 142 is provided with a bulb butt joint part 1421 at one end of the bulb core pipe 142 so as to be in butt joint with a port of the core pipe accommodating cavity, which is positioned at the inner-layer shunt small-diameter section 1412 (the port is arranged into an arc shape so as to be matched with the bulb butt joint part 1421 and facilitate the rotation of the bulb butt joint part 1421), an accommodating cavity suitable for accommodating the mold core 143 is formed in the bulb butt joint part 1421, the first wire inlet channel 11 penetrates through the axial direction of the mold core 143 and the core pipe 142, the other end of the bulb core pipe 142 is in threaded joint with the core pipe and cap 145, the core pipe and cap 145 is arranged in the die cavity and cap accommodating cavity, the core pipe adjusting bolt 146 can penetrate through the core pipe adjusting threaded hole and the core pipe and cap 145 to be in butt joint, a spherical ring 144 is arranged between the core pipe and the end face of the inner-layer shunt flange ring 1413, the spherical center of the spherical ring 144 is overlapped with the spherical center of the bulb butt joint part 1421, the abutting face of the core pipe and the spherical ring 144 can be arranged into an arc face matched with the spherical center face, when the core pipe and cap 145 is screwed down in the core pipe and cap 146, as shown in fig. 2, the thickness of the core pipe and the cap can be uniformly extruded in the left and right direction of the insulating layer and the insulating layer can be uniformly adjusted.

Further, referring to fig. 7 and 8, in an embodiment of the inner multi-color-strip double-layer co-extrusion cable insulation layer extrusion head, a color strip shunt member 15 includes a color strip shunt large-diameter section 151 and a color strip shunt small-diameter section 152, a color strip shunt flange ring 153 is disposed at an end of one end where the color strip shunt large-diameter section 151 is located, a color strip shunt groove 154 and an inner-layer shunt feed hole 155 are disposed on the color strip shunt large-diameter section 151, a discharge port of the color strip shunt groove 154 is disposed at a connection position of the color strip shunt large-diameter section 151 and the color strip shunt small-diameter section 152, and as shown in fig. 7, the color strip shunt groove 154 can be disposed in a color strip shunt convex structure extending along an axial direction of the color strip shunt in an area where the color strip shunt member is fed so as to shunt color material, and the color strip shunt groove 154 extends from the color strip shunt convex structure along a circumferential direction of the color strip shunt large-diameter section 151, and when the color strip shunt large-diameter section 151 is a half-length of the color strip shunt large-diameter section, that the color strip shunt groove 154 can reach a circumferential direction of the color strip shunt groove 152 along the axial direction of the color strip shunt large-diameter section 152, and the color strip shunt large-diameter section 152 can be completely extruded from the color strip shunt groove 152.

In addition, referring to fig. 8 and 9, a stop ring 1521 is further disposed at an end of the color bar splitting small diameter section 152 away from the color bar splitting large diameter section 151, a plurality of color bar forming holes 1522 penetrating through a side wall of the color bar splitting small diameter section 152 and circumferentially arranged along the color bar splitting small diameter section 152 are disposed at a connection portion of the stop ring 1521 and the color bar splitting small diameter section 152, each forming hole is connected with the inner layer rubber material channel 12, the stop ring 1521 can be abutted against an inner wall of the first extruder body 16, so that when the color rubber material flows to the stop ring 1521, the flow direction can be stopped and changed by the stop ring 1521, so that the color rubber material flows from the color bar forming holes 1522 to the inner layer rubber material channel 12, the color rubber material can be mixed with the inner layer rubber material in advance, and the mixed color rubber material and the inner layer rubber material will pass through a shrinking portion of the inner layer rubber material channel 12, so that layering is not easy between the color rubber material and the inner layer rubber material.

Further, referring to fig. 2, in an embodiment of the inner multi-color stripe double-layer co-extrusion cable insulation extruder head of the present application, the first extruder body 16 includes a body 161 and a body heating jacket 162, and the body heating jacket 162 is sleeved on the body 161, so as to heat the body 161, the inner splitter 141 and the color stripe splitter 15, so that the glue materials in the inner splitter box 1415 and the color stripe splitter box 154 can keep a flowing state, and blockage is not easy to occur. A body 161 is provided with a first feeding hole 1611 and a second feeding hole 1612, the first feeding hole 1611 is communicated with the color bar splitter box 154, the second feeding hole 1612 is communicated with the inner layer splitter feeding hole 155, so that feeding of the inner layer glue material channel 12 and the color bar glue material channel 13 can be realized, and a body 161 is also provided with connecting holes matched with the color bar splitter flange ring 153 and the inner layer splitter flange ring 1413, so that connection among the three can be realized in a threaded fastening mode.

Further, referring to fig. 2, in an embodiment of the extruder head for extruding an insulation layer of an inner multi-color strip double-layer co-extruded cable of the present application, the second extrusion assembly 2 further includes an outer layer splitting unit 23 and a second body 24, wherein a second wire inlet channel 21 is formed inside the outer layer splitting unit 23, the second body 24 is sleeved on the outer layer splitting unit 23, and an outer layer sizing material channel 22 is formed therebetween.

Specifically, as shown in fig. 2, the outer layer diverting unit 23 includes an outer layer diverting member 231, a die sleeve 232, and a die sleeve union cap 233; wherein, outer reposition of redundant personnel piece 231 includes outer reposition of redundant personnel big footpath section 2311, outer reposition of redundant personnel minor diameter section 2312 and locates outer shunt groove 2313 on the outer reposition of redundant personnel big footpath section 2311, outer shunt groove 2313's discharge gate locate outer reposition of redundant personnel big footpath section 2311 with the junction of outer reposition of redundant personnel minor diameter section 2312, and as shown in fig. 10, outer shunt groove 2313 can set up the protruding structure of outer reposition of redundant personnel of axial extension along outer shunt in its region of feeding, in order to be used for shunting outer sizing material, and outer shunt groove 2313 is from the protruding structure department of outer reposition of redundant personnel, extend along the circumference of outer reposition of redundant personnel big footpath section 2311, and when the total length of circumference extension reaches the circumference of outer reposition of redundant personnel big footpath section 2311, outer shunt groove 2313 is located along the axial to outer reposition of redundant personnel minor diameter section 2312 of outer reposition of redundant personnel of minor diameter section 2311 promptly, and the position department corresponding to the notch of outer shunt minor diameter section 2313 is equipped with the protruding structure of branch, in order to make from the outer layer reposition of redundant personnel in 2313 the regional outside sizing material can wrap up whole circumference of the whole reposition of redundant personnel section 2312, thereby the integrality of the whole insulation of the whole outer reposition of redundant personnel can be guaranteed.

In addition, an internal thread adjusting hole 2314 is formed in the outer layer shunt member 231, the die sleeve 232 and the die sleeve cap 233 can be placed in the internal thread adjusting hole 2314, an external thread structure matched with the internal thread adjusting hole 2314 is arranged on the die sleeve cap 233, the second wire inlet channel 21 penetrates through the die sleeve 232 and the die sleeve cap 233 in the axial direction, the die sleeve 232 is positioned at the inlet end of the second wire inlet channel 21, the adjustment of the overall thickness of the outer layer insulating layer 43 can be achieved through the adjustment of the die sleeve 232 and the die sleeve cap 233, and the outer layer insulating layer 43 is unlikely to be broken and discontinuous.

Further, referring to fig. 2, in an embodiment of the inner multi-color strip double-layer co-extrusion cable insulation extruder head of the present application, the second body 24 includes a second body 241, a calibration ring 242, a plurality of calibration bolts 243 and a second body heating jacket 244, where the second body heating jacket 244 is sleeved on the second body 241, so as to heat the second body 241 and the outer layer splitter 231, thereby ensuring that the outer layer glue in the outer layer splitter slot 2313 keeps flowing, and is not easy to cause blocking, the second body 241 may be provided with two body connection holes matched with the outer layer flange structure, the two body connection holes may be provided to penetrate through the axial direction of the second body 241, and threaded holes matched with the two body connection holes may be provided on the first body 161, so that the bolts may penetrate through the second body 241 of the outer layer flange structure and be screwed with the threaded holes on the first body to achieve connection between the first extrusion assembly 1 and the second extrusion assembly 2.

In addition, an outer layer feeding hole 2411 and a plurality of calibration holes are further formed in the two machine body 241, and the outer layer feeding hole 2411 can be communicated with the outer layer sizing material channel 22 so as to realize feeding of the outer layer sizing material channel 22; the calibration hole penetrates through the two machine body 241 in the radial direction and corresponds to the outer layer split small-diameter section 2312, the calibration ring 242 is sleeved at the outer layer split small-diameter section 2312, one surface of the calibration ring 242 is abutted against the two machine body 241, the other surface is abutted against the temperature control assembly 3, and the plurality of calibration bolts 243 are suitable for penetrating through the calibration hole and abutted against the calibration ring 242, so that the position of the calibration ring 242 can be adjusted by screwing the plurality of calibration bolts 243, and the thickness of the outer layer insulating layer 43 can be more uniform.

The implementation principle of the extruder head for the inner multi-color strip double-layer co-extrusion cable insulation layer provided by the embodiment of the application is as follows: the first extrusion component 1 is suitable for extruding the inner insulating layer 41, the second extrusion component 2 is suitable for extruding the outer insulating layer, the first extrusion component 1 and the second extrusion component 2 are connected, the temperature control component 3 is arranged at the joint of the first extrusion component 1 and the second extrusion component, and the inner layer sizing material channel 12 extruding the inner insulating layer 41 and the outer layer sizing material channel 22 extruding the outer insulating layer are heated at different temperatures through the temperature control component 3 respectively, so that the conducting wire 4 is covered with the outer insulating layer 43 in the state that the inner insulating layer 41 is not completely solidified after being covered with the inner insulating layer 41, the inner insulating layer and the outer insulating layer can be better adhered together, the situation that the combination property is poor and layering easily occurs is difficult, and the quality of a produced cable is higher.

The inner multi-color strip double-layer co-extrusion cable insulation layer extruder head is compact in structure and capable of extruding two layers of insulation layers at one time, so that two cable insulation layer extruders which can only extrude a single-layer insulation layer can be completed by only one inner multi-color strip double-layer co-extrusion cable insulation layer extruder head, and therefore cost can be saved and flat production efficiency can be improved.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. An inner-layer multi-color strip double-layer co-extrusion cable insulation layer extruder head is characterized in that: comprises a first extrusion component (1), a second extrusion component (2) and a temperature control component (3);

a first inlet wire channel (11) and an inner layer sizing material channel (12) which are suitable for a wire (4) to pass through are arranged in the first extrusion assembly (1), the inner layer sizing material channel (12) is connected with an inner layer pumping device, and a discharge port of the inner layer sizing material channel (12) is arranged at the outlet end of the first inlet wire channel (11);

a second inlet wire channel (21) and an outer layer sizing material channel (22) which are suitable for the lead (4) to pass through are arranged in the second extrusion assembly (2), the outer layer sizing material channel (22) is connected with an outer layer pumping device, and a discharge port of the outer layer sizing material channel (22) is arranged at the inlet end of the second inlet wire channel (21);

the temperature control assembly (3) is arranged between the outlet end of the first inlet wire channel (11) and the inlet end of the second inlet wire channel (21), and the temperature control assembly (3) is suitable for heating the inner layer sizing material channel (12) and the outer layer sizing material channel (22) at different temperatures.

2. An inner multi-color strip double layer co-extruded cable insulation extruder head as defined in claim 1, wherein: the first extrusion assembly (1) further comprises a color bar sizing material channel (13), an inner layer splitting unit (14), a color bar splitting piece (15) and a first extrusion machine body (16), wherein the color bar sizing material channel (13) is connected with a color bar pumping device, and a discharge hole of the color bar sizing material channel (13) is communicated with the inner layer sizing material channel (12); the inner layer splitting unit (14) is internally provided with the first incoming line channel (11), the color bar splitting piece (15) is sleeved on the inner layer splitting unit (14), and the inner layer sizing material channel (12) is formed between the color bar splitting piece (15) and the inner layer splitting unit (14); the first extruder body (16) is sleeved on the color bar dividing piece (15), and a color bar sizing material channel (13) is formed between the first extruder body (16) and the color bar dividing piece (15).

3. An inner multi-color strip double layer co-extruded cable insulation extruder head as claimed in claim 2, wherein: the inner-layer shunt unit (14) comprises an inner-layer shunt (141), the inner-layer shunt (141) comprises an inner-layer shunt large-diameter section (1411) and an inner-layer shunt small-diameter section (1412), an inner-layer shunt flange ring (1413) is arranged at the end part of one end of the inner-layer shunt large-diameter section (1411), an inner-layer shunt groove (1415) is arranged on the inner-layer shunt large-diameter section (1411), and a discharge hole of the inner-layer shunt groove (1415) is formed at the joint of the inner-layer shunt large-diameter section (1411) and the inner-layer shunt small-diameter section (1412).

4. A multi-color strip bilayer co-extruded cable insulation extruder head as defined in claim 3 wherein: the inner layer split-flow unit (14) further comprises a ball core pipe (142), a mold core (143), a spherical ring (144), a core pipe parallel cap (145) and a plurality of core pipe adjusting bolts (146);

the inner-layer flow divider (141) is provided with a core tube accommodating cavity penetrating through the axial direction of the inner-layer flow divider (141), a limiting convex ring (1414) is arranged at a port of the core tube accommodating cavity, which is positioned at the inner-layer flow divider flange ring (1413), the limiting convex ring (1414) protrudes towards the direction perpendicular to the end face of the inner-layer flow divider flange ring (1413) so as to form a cap accommodating cavity suitable for accommodating the core tube and the cap (145), and a plurality of core tube adjusting threaded holes penetrating through the side wall and capable of being matched with the core tube adjusting bolts (146) are arranged on the side wall of the limiting convex ring (1414);

the ball head core pipe (142) is arranged in the core pipe accommodating cavity, one end of the ball head core pipe (142) is provided with a ball head abutting part (1421) to abut against a port of the core pipe accommodating cavity, which is positioned at the inner-layer diversion small-diameter section (1412), the other end of the ball head core pipe (142) is connected with the core pipe cap (145), the core pipe cap (145) is arranged in the cap accommodating cavity, the spherical ring (144) is arranged between the core pipe cap (145) and the end face of the inner-layer diverter flange ring (1413), and the core pipe adjusting bolt (146) can penetrate through the core pipe adjusting threaded hole to abut against the core pipe cap (145);

an accommodating cavity suitable for accommodating the die core (143) is formed in the ball head abutting part (1421), and the first wire inlet channel (11) penetrates through the die core (143) and the ball head core tube (142) in the axial direction.

5. An inner multi-color strip double layer co-extruded cable insulation extruder head as described in claim 4, wherein: the color bar branching piece (15) comprises a color bar branching large-diameter section (151) and a color bar branching small-diameter section (152), a color bar branching flange ring (153) is arranged at the end part of one end where the color bar branching large-diameter section (151) is located, a color bar branching groove (154) and an inner layer branching feed hole (155) are formed in the color bar branching large-diameter section (151), a discharge hole of the color bar branching groove (154) is formed in the junction of the color bar branching large-diameter section (151) and the color bar branching small-diameter section (152), a stop ring (1521) is arranged at the junction of the color bar branching small-diameter section (152) and is arranged at the junction of the color bar branching small-diameter section (152) in a penetrating manner, a plurality of color bar sizing material forming holes (1522) are formed in the circumferential direction of the color bar branching small-diameter section (152), and each color bar forming hole (1522) is connected with the inner layer 1415 through the branching hole (155), and the color bar branching feed hole (155) is connected with the inner layer 1415.

6. An inner multi-color strip double layer co-extruded cable insulation extruder head as described in claim 5, wherein: the first extruder body (16) comprises a body (161) and a body heating sleeve (162), and the body heating sleeve (162) is sleeved on the body (161); be equipped with first feed hole (1611) and second feed hole (1612) on a organism body (161), first feed hole (1611) with colour bar splitter box (154) intercommunication, second feed hole (1612) with inlayer reposition of redundant personnel feed hole (155) intercommunication, still be equipped with on an organism body (161) with colour bar splitter flange ring (153) and inlayer splitter flange ring (1413) complex connecting hole.

7. An inner multi-color strip double layer co-extruded cable insulation extruder head as defined in claim 1, wherein: the second extrusion assembly (2) further comprises an outer layer distribution unit (23) and a second machine body (24), the second inlet wire channel (21) is formed in the outer layer distribution unit (23), the second machine body (24) is sleeved on the outer layer distribution unit (23), and the outer layer sizing material channel (22) is formed between the outer layer distribution unit and the second machine body.

8. The inner multi-color strip double layer co-extruded cable insulation extruder head of claim 7, wherein: the outer layer diversion unit (23) comprises an outer layer diversion piece (231), a die sleeve (232) and a die sleeve cap (233); the outer shunt piece (231) is including outer big footpath section (2311) of reposition of redundant personnel, outer reposition of redundant personnel path section (2312) and locate outer shunt groove (2313) on the big footpath section of outer reposition of redundant personnel (2311), the discharge gate of outer shunt groove (2313) is located outer big footpath section (2311) with the junction of outer reposition of redundant personnel path section (2312), still be formed with internal thread regulation hole (2314) in outer shunt piece (231), die sleeve (232) with die sleeve and cap (233) all can be placed in internal thread regulation hole (2314), just be equipped with on die sleeve and cap (233) with internal thread regulation hole (2314) assorted external screw thread structure, second inlet wire passageway (21) run through in die sleeve (232) with the axis direction of die sleeve and cap (233), just die sleeve (232) are in the entry end department of second inlet wire passageway (21).

9. The inner multi-color strip double layer co-extruded cable insulation extruder head of claim 8, wherein: the second machine body (24) comprises a second machine body (241), a calibration ring (242), a plurality of calibration bolts (243) and a second machine body heating sleeve (244), wherein the second machine body heating sleeve (244) is sleeved on the second machine body (241); an outer layer feeding hole (2411) and a plurality of calibration holes are arranged on the two machine body (241), and the outer layer feeding hole (2411) is communicated with the outer layer sizing material channel (22); the calibration hole corresponds to the outer-layer split small-diameter section (2312), the calibration ring (242) is sleeved at the outer-layer split small-diameter section (2312), one surface of the calibration ring (242) is abutted to the two machine body bodies (241), the other surface of the calibration ring is abutted to the temperature control assembly (3), and a plurality of calibration bolts (243) are suitable for penetrating through the calibration hole and abutted to the calibration ring (242).

10. An inner multi-color bar double layer co-extruded cable insulation extruder head according to any one of claims 1 to 9, wherein: the temperature control assembly (3) comprises a heating sleeve (31) and a pipeline unit (32), the heating sleeve (31) comprises a first heating cavity (311) and a second heating cavity (312), the pipeline unit (32) comprises a first heating medium inflow pipe (321), a first heating medium outflow pipe (322), a second heating medium inflow pipe (323) and a second heating medium outflow pipe (324), the first heating medium inflow pipe (321) and the first heating medium outflow pipe (322) are communicated with the first heating cavity (311), the first heating cavity (311) is suitable for heating the inner sizing material channel (12), and the second heating cavity (312) is arranged for heating the outer sizing material channel (22).