A multi-layered cable insulation extruder head

Abstract

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

Description

Technical Field

[0001] This application belongs to the field of cable processing equipment, and in particular relates to an extruder head for a double-layer co-extrusion cable insulation layer with an inner multi-color stripe. Background Technology

[0002] A cable insulation extruder head is a tool used to cover metal conductors with an insulation layer. It typically involves hot-melting insulating materials such as polyethylene or polyvinyl chloride and then extruding them to cover the surface of the metal conductor.

[0003] With the development of cable production, some cables now have two layers of insulation. The inner layer uses multi-colored stripes to distinguish between multiple wire cores, while the outer layer usually uses a more wear-resistant, corrosion-resistant, and self-lubricating material to give the cable a longer service life.

[0004] In existing technologies, in order to cover the cable with two layers of insulation, two sets of extruders are usually used to extrude the cable in two stages. However, two extrusions can easily cause poor bonding between the two insulation layers and delamination, and adding an extra step will also increase costs.

[0005] In view of this, there is a need to provide an extrusion head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe. Summary of the Invention

[0006] To improve upon the aforementioned deficiencies, this application provides an extrusion head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe.

[0007] The extrusion die head for a double-layer co-extruded cable insulation layer with inner multi-color stripes provided in this application adopts the following technical solution.

[0008] An extruder head for a double-layer co-extruded cable insulation layer with an inner multi-colored stripe includes a first extrusion assembly, a second extrusion assembly, and a temperature control assembly. The first extrusion assembly has a first inlet channel suitable for the passage of a conductor and an inner layer adhesive channel. The inner layer adhesive channel is connected to an inner layer pumping device, and the outlet of the inner layer adhesive channel is located at the outlet end of the first inlet channel. The second extrusion assembly has a second inlet channel suitable for the passage of the conductor and an outer layer adhesive channel. The outer layer adhesive channel is connected to an outer layer pumping device, and the outlet of the outer layer adhesive channel is located at the inlet end of the second inlet channel. The temperature control assembly is located between the outlet end of the first inlet channel and the inlet end of the second inlet channel, and the temperature control assembly is adapted to heat the inner layer adhesive channel and the outer layer adhesive channel at different temperatures.

[0009] By adopting the above technical solution, the first extrusion assembly is suitable for extruding the inner insulation layer, and the second extrusion assembly is suitable for extruding the outer insulation layer. The first extrusion assembly and the second extrusion assembly are connected, and a temperature control assembly is set at the connection between the two. The temperature control assembly heats the inner layer adhesive channel and the outer layer adhesive channel of the extruded inner insulation layer at different temperatures. This allows the outer insulation layer to be applied to the conductor before the inner insulation layer is fully cured, thus enabling the inner and outer insulation layers to adhere better together and reducing the likelihood of poor bonding and delamination, resulting in higher quality cables.

[0010] Specifically, the first extrusion assembly further includes a color bar material channel, an inner layer diversion unit, a color bar diversion component, and a first extruder body. The color bar material channel is connected to a color bar pumping device, and the outlet of the color bar material channel is connected to the inner layer material channel. The inner layer diversion unit has a first inlet channel formed therein. The color bar diversion component is sleeved on the inner layer diversion unit, and the inner layer material channel is formed between the color bar diversion component and the inner layer diversion unit. The first extruder body is sleeved on the color bar diversion component, and the color bar material channel is formed between the first extruder body and the color bar diversion component.

[0011] By adopting the above technical solution, inner layer color stripes can be formed on the inner insulating layer.

[0012] Specifically, the inner layer diversion unit includes an inner layer diverter, which includes an inner layer diverter large diameter section and an inner layer diverter small diameter section. An inner layer diverter flange ring is provided at one end of the inner layer diverter large diameter section, and an inner layer diverter groove is provided on the inner layer diverter large diameter section. The discharge port of the inner layer diverter groove is located at the connection between the inner layer diverter large diameter section and the inner layer diverter small diameter section.

[0013] By adopting the above technical solution, an inner insulation layer with a ring-shaped cross-section can be extruded from the inner shunt section, so as to effectively wrap the conductor.

[0014] Specifically, the inner layer diverter unit further includes a ball-head core tube, a mold core, a spherical ring, a core tube cap, and multiple core tube adjusting bolts; the inner layer diverter forms a core tube receiving cavity extending through the axial direction of the inner layer diverter, and a limiting protrusion ring is provided at the port of the core tube receiving cavity located at the flange ring of the inner layer diverter. The limiting protrusion ring protrudes in a direction perpendicular to the end face of the flange ring of the inner layer diverter to form a cap receiving cavity suitable for accommodating the core tube cap. The side wall of the limiting protrusion ring is provided with multiple core tube adjusting threaded holes extending through the side wall and capable of cooperating with the core tube adjusting bolts; the ball-head core tube is placed in the core tube Inside the receiving cavity, one end of the ball-head core tube is provided with a ball-head abutment portion, which abuts against the port of the core tube receiving cavity located at the inner layer diverter small diameter section via the ball-head abutment portion. The other end of the ball-head core tube is connected to the core tube cap, and the core tube cap is placed inside the cap receiving cavity. A spherical ring is provided between the core tube cap and the end face of the inner layer diverter flange ring, and the core tube adjusting bolt can pass through the core tube adjusting threaded hole and abut against the core tube cap. A receiving cavity suitable for accommodating the mold core is formed inside the ball-head abutment portion, and the first inlet channel passes through the axial direction of the mold core and the ball-head core tube.

[0015] By adopting the above technical solution, the state of the ball-head core tube can be adjusted by turning multiple core tube adjusting bolts, thereby ensuring that the thickness of the extruded inner insulation layer is uniform.

[0016] Specifically, the color stripe diverter includes a large-diameter section and a small-diameter section. A flange ring is provided at one end of the large-diameter section, and a color stripe diverter groove and an inner layer diverter feeding hole are provided on the large-diameter section. The outlet of the color stripe diverter groove is located at the connection between the large-diameter section and the small-diameter section. A stop ring is provided at one end of the small-diameter section away from the large-diameter section. Multiple color stripe forming holes are provided at the connection between the stop ring and the small-diameter section, penetrating the sidewall of the small-diameter section and arranged circumferentially along the small-diameter section. Each color stripe forming hole is connected to the inner layer adhesive channel, and the inner layer diverter feeding hole is connected to the inlet of the inner layer diverter groove.

[0017] By adopting the above technical solution, inner layer color stripes can be formed on the inner insulation layer, and material can be supplied to the inner layer diversion groove.

[0018] Specifically, the first extruder body includes a body body and a heating sleeve, the heating sleeve being fitted onto the body body; the body body has a first feed hole and a second feed hole, the first feed hole being connected to the color bar diverter groove, the second feed hole being connected to the inner layer diverter feed hole, and the body body also has a connecting hole that mates with the color bar diverter flange ring and the inner layer diverter flange ring.

[0019] By adopting the above technical solution, it is possible to feed materials into the inner layer distribution channel and the color strip distribution channel, and to heat the components in the first extrusion assembly, thereby avoiding blockage of the inner layer rubber channel and the color strip rubber channel.

[0020] Furthermore, the second extrusion assembly also includes an outer layer diversion unit and a second body. The outer layer diversion unit has a second inlet channel formed inside it, and the second body is sleeved on the outer layer diversion unit, with the outer layer adhesive channel formed between the two.

[0021] By adopting the above technical solution, the outer insulating layer can be extruded.

[0022] Specifically, the outer layer diversion unit includes an outer layer diversion component, a mold sleeve, and a mold sleeve cap; the outer layer diversion component includes an outer layer diversion large diameter section, an outer layer diversion small diameter section, and an outer layer diversion groove disposed on the outer layer diversion large diameter section. The outlet of the outer layer diversion groove is disposed at the connection between the outer layer diversion large diameter section and the outer layer diversion small diameter section. An internal thread adjustment hole is also formed inside the outer layer diversion component. The mold sleeve and the mold sleeve cap can both be placed in the internal thread adjustment hole, and the mold sleeve cap is provided with an external thread structure that matches the internal thread adjustment hole. The second inlet channel passes through the axial direction of the mold sleeve and the mold sleeve cap, and the mold sleeve is located at the inlet end of the second inlet channel.

[0023] By adopting the above technical solution, the overall thickness of the outer insulation layer can be adjusted by adjusting the mold and the mold cap, and the outer insulation layer is less likely to be damaged or discontinuous.

[0024] Specifically, the second body includes a second body body, a calibration ring, multiple calibration bolts, and a second body heating sleeve, the second body heating sleeve being fitted onto the second body body; the second body body is provided with an outer layer feeding hole and multiple calibration holes, the outer layer feeding hole being connected to the outer layer adhesive channel; the calibration holes are corresponding to the outer layer diversion small diameter section, the calibration ring is fitted onto the outer layer diversion small diameter section, and one side of the calibration ring abuts against the second body body, the other side abuts against the temperature control component, and the multiple calibration bolts are adapted to pass through the calibration holes and abut against the calibration ring.

[0025] By adopting the above technical solution, the position of the calibration ring can be adjusted by turning multiple calibration bolts, making the thickness of the outer insulation layer more uniform.

[0026] Furthermore, the temperature control component includes a heating sleeve and a pipe unit. The heating sleeve includes a first heating chamber and a second heating chamber. The pipe unit includes a first heat medium inlet pipe, a first heat medium outlet pipe, a second heat medium inlet pipe, and a second heat medium outlet pipe. The first heat medium inlet pipe and the first heat medium outlet pipe are connected to the first heating chamber. The first heating chamber is adapted to heat the inner layer adhesive channel and the color strip adhesive channel. The second heating chamber is located for heating the outer layer adhesive channel.

[0027] By adopting the above technical solution, the temperature control component can heat or insulate the two materials that make up the inner and outer insulation layers, thereby ensuring the overall quality of the insulation layer.

[0028] In summary, this application includes the following beneficial technical effects:

[0029] The first extrusion assembly is suitable for extruding the inner insulation layer, and the second extrusion assembly is suitable for extruding the outer insulation layer. The first extrusion assembly and the second extrusion assembly are connected, and a temperature control assembly is set at the connection between the two. The temperature control assembly heats the inner layer adhesive channel and the outer layer adhesive channel of the extruded inner insulation layer at different temperatures. This allows the outer insulation layer to be applied to the conductor before the inner insulation layer is fully cured, thus enabling the inner and outer insulation layers to adhere better together and reducing the likelihood of poor bonding and delamination, resulting in higher quality cables.

[0030] The inner multi-color stripe double-layer co-extrusion cable insulation extruder head has a compact structure and can extrude two insulation layers at once. Therefore, only one inner multi-color stripe double-layer co-extrusion cable insulation extruder head is needed to complete the work of two cable insulation extruders that can only extrude single-layer insulation layers. This can save costs and improve production efficiency. Attached Figure Description

[0031] Figure 1 This is an exploded view of the extruder head of the inner multi-colored striped double-layer co-extruded cable insulation layer of this application.

[0032] Figure 2 This is a cross-sectional view of the extruder head of the inner multi-colored striped double-layer co-extruded cable insulation layer of this application, cut along its own axial direction.

[0033] Figure 3 This is a schematic diagram of the cross-section of the cable produced by the extruder head of the inner multi-colored striped double-layer co-extruded cable insulation layer of this application.

[0034] Figure 4 This is a cross-sectional view of the temperature control component in the extruder head of the inner multi-colored striped double-layer co-extruded cable insulation layer of this application, cut along its own axial direction.

[0035] Figure 5 This is a three-dimensional structural diagram of the inner layer shunt unit in the extruder head of the inner multi-color striped double-layer co-extruded cable insulation layer of this application.

[0036] Figure 6 This is a cross-sectional view along its own axis of the inner layer shunt unit in the extruder head of the inner multi-colored striped double-layer co-extruded cable insulation layer of this application.

[0037] Figure 7 This is a three-dimensional structural diagram of the color stripe diverter in the extruder head of the inner multi-color stripe double-layer co-extruded cable insulation layer of this application.

[0038] Figure 8 This is a cross-sectional view along its own axis of the color stripe distributor in the extruder head of the inner multi-color stripe double-layer co-extruded cable insulation layer of this application.

[0039] Figure 9 yes Figure 8 A cross-sectional view along the AA direction.

[0040] Figure 10 This is a three-dimensional structural diagram of the outer layer diverter in the extruder head of the inner multi-colored striped double-layer co-extruded cable insulation layer of this application.

[0041] Reference numerals: 1. First extrusion assembly; 11. First inlet channel; 12. Inner layer rubber channel; 13. Color stripe rubber channel; 14. Inner layer distribution unit; 141. Inner layer distributor; 1411. Inner layer distributor large diameter section; 1412. Inner layer distributor small diameter section; 1413. Inner layer distributor flange ring; 1414. Limiting convex ring; 1415. Inner layer distribution groove; 142. Ball head core tube; 1421. Ball head abutment part; 143. Die core; 44. Spherical ring; 145. Core tube cap; 146. Core tube adjusting bolt; 15. Color bar diverter; 151. Large diameter section of color bar diverter; 152. Small diameter section of color bar diverter; 1521. Stop ring; 1522. Color bar forming hole; 153. Flange ring of color bar diverter; 154. Color bar diverter groove; 155. Inner layer diverter feed hole; 16. First extruder body; 161. First extruder body; 1611. First feed hole; 1612. Second feed hole 162. Material orifice; 1. Heating jacket of the first machine body; 2. Second extrusion assembly; 21. Second inlet channel; 22. Outer layer rubber channel; 23. Outer layer flow divider unit; 231. Outer layer flow divider component; 2311. Outer layer flow divider large diameter section; 2312. Outer layer flow divider small diameter section; 2313. Outer layer flow divider groove; 2314. Internal thread adjustment hole; 232. Die sleeve; 233. Die sleeve cap; 24. Second machine body; 241. Second machine body; 2411. Outer layer 242. Feeding hole; 243. Calibration ring; 244. Calibration bolt; 245. Heating sleeve for the second body; 3. Temperature control assembly; 31. Heating sleeve; 311. First heating chamber; 312. Second heating chamber; 32. Piping unit; 321. First heat medium inlet pipe; 322. First heat medium outlet pipe; 323. Second heat medium inlet pipe; 324. Second heat medium outlet pipe; 4. Wire; 41. Inner insulation layer; 42. Inner color stripe; 43. Outer insulation layer. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0043] This application discloses an extruder head for a double-layer co-extruded cable insulation layer with an inner multi-colored stripe.

[0044] Reference Figure 1 and Figure 2An extrusion head for a double-layer co-extruded cable insulation layer with an inner multi-colored stripe is disclosed, comprising a first extrusion assembly 1, a second extrusion assembly 2, and a temperature control assembly 3. The first extrusion assembly 1 has a first inlet channel 11 and an inner layer adhesive channel 12, through which a wire 4 can pass. The inner layer adhesive channel 12 is connected to an inner layer pump device (not shown) to supply inner layer adhesive material, such as PVC (polyvinyl chloride) or PE (polyethylene), for forming the inner insulation layer 41. The material is provided in the second extrusion assembly 2, which has a second inlet channel 21 and an outer layer material channel 22. The wire 4 can pass through the second inlet channel 21. The outer layer material channel 22 is connected to an outer layer pumping device (not shown in the figure) to supply the outer layer material, such as nylon material, to the outer layer material channel 22 for forming the outer layer insulation layer 43. The outlet of the outer layer material channel 22 is located at the inlet end of the second inlet channel 21.

[0045] like Figure 2 and Figure 3 As shown, during the production process, the wire 4 first passes through the outlet end of the first inlet channel 11, and is covered with an inner insulating layer 41 when passing through the outlet end of the first inlet channel 11. Subsequently, the wire 4 passes through the inlet end of the second inlet channel 21, and is covered with an outer insulating layer 43 when passing through the inlet end of the second inlet channel 21. It should be noted that during the production process, the inner layer adhesive in the inner layer adhesive channel 12 and the outer layer adhesive in the outer layer adhesive channel 22 must be kept in a flowable state. Therefore, the wire 4 can be connected to the outlet end of the first inlet channel 11 and the second inlet channel 22. A temperature control component 3 is installed between the inlet ends of channel 21 to heat the inner layer rubber channel 12 and the outer layer rubber channel 22 at different temperatures. This ensures that both the inner and outer layers of rubber are kept at a suitable temperature and in a flowing state without affecting the other. For example, if the inner layer rubber is made of PVC or PE material, the temperature at which the temperature control component 3 heats or keeps the inner layer rubber channel 12 can be controlled between 150°C and 180°C, and the temperature at which the temperature control component 3 heats or keeps the outer layer rubber channel 22 can be controlled between 250°C and 300°C.

[0046] The above design allows for heating or heat preservation of different materials at different temperatures, making the insulation material easier to extrude. Furthermore, after the conductor 4 is covered with the inner insulation layer 41, the outer insulation layer 43 is applied before the inner insulation layer 41 is fully cured, allowing the inner and outer insulation layers to adhere better and preventing poor bonding and delamination. This results in higher quality cables. The compact structure of the inner multi-color stripe double-layer co-extrusion cable insulation extruder head allows for the extrusion of two insulation layers at once. Therefore, only one inner multi-color stripe double-layer co-extrusion cable insulation extruder head is needed to perform the work of two cable insulation extruders that can only extrude single-layer insulation layers. This saves costs and improves production efficiency.

[0047] Specifically, refer to Figure 4 In one embodiment of the inner multi-color stripe double-layer co-extruded cable insulation extruder head of this application, the temperature control component 3 is configured 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 connected to the first heating chamber 311, and the first heating chamber 311 is suitable for heating the inner layer rubber channel 12 and the color stripe rubber channel 13. The second heating chamber 312 is located for heating the outer layer rubber channel 22.

[0048] like Figure 2 and Figure 4 As shown, the heating sleeve 31 can be configured with a concave conical surface at one end and a convex conical surface at the other end. This allows the concave conical surface to cooperate with the first extrusion assembly 1 to form a constricted portion of the inner layer adhesive channel 12, and the convex conical surface to cooperate with the second extrusion assembly 2 to form a constricted portion of the outer layer adhesive channel 22. This enables the extruded inner layer insulation layer 41 to effectively cover and connect the wire 4, and the extruded outer layer insulation layer 43 to effectively cover and connect the inner layer insulation layer 41.

[0049] Furthermore, referring to Figure 2 and Figure 3In one embodiment of the inner layer multi-color stripe double-layer co-extruded cable insulation extruder head of this application, the first extrusion assembly 1 further includes a color stripe material channel 13, an inner layer diversion unit 14, a color stripe diversion component 15, and a first extruder body 16. The color stripe material channel 13 is connected to a color stripe pump device (not shown in the figure) to supply colored material (the colored material is the same as the inner layer material mentioned above, which is PVC or PE material, but pigments are added to the colored material so that its color is different from that of the inner layer material) to the color stripe material channel 13. The outlet of the color stripe material channel 13 is connected to the inner layer material channel 12. The colored rubber compound is mixed with the inner layer rubber compound and then extruded from the inner layer rubber compound channel 12 to form an inner layer color strip 42. The method of mixing the colored rubber compound with the inner layer rubber compound first allows the mixed colored rubber compound and the inner layer rubber compound to form a whole in the inner layer rubber compound channel 12, so as to prevent delamination. The mixed colored rubber compound and the inner layer rubber compound as a whole deforms to form a thinner inner layer color strip 42. Compared with the method of obtaining a thinner inner layer color strip 42 by reducing the size of the color strip rubber compound channel 13, the method of mixing first is less likely to cause the color strip rubber compound channel 13 to become blocked.

[0050] like Figure 2 and Figure 5 As shown, the first extrusion assembly 1 can be configured to form a first inlet channel 11 in the inner layer diversion unit 14, a color strip diversion component 15 is sleeved on the inner layer diversion unit 14, and an inner layer rubber channel 12 is formed between the color strip diversion component 15 and the inner layer diversion unit 14, and a first extruder body 16 is sleeved on the color strip diversion component 15, and a color strip rubber channel 13 is formed between the first extruder body 16 and the color strip diversion component 15.

[0051] Specifically, such as Figure 5 and Figure 6 As shown, the inner layer diversion unit 14 can be configured to include an inner layer diverter 141, which can be configured to include an inner layer diverter large diameter section 1411 and an inner layer diverter small diameter section 1412. An inner layer diverter flange ring 1413 is provided at one end of the inner layer diverter large diameter section 1411, and an inner layer diverter groove 1415 is provided on the inner layer diverter large diameter section 1411. The outlet of the inner layer diverter groove 1415 is located at the connection between the inner layer diverter large diameter section 1411 and the inner layer diverter small diameter section 1412, and as... Figure 5As shown, the inner layer diversion groove 1415 can be configured with an inner layer diversion protrusion extending axially along the inner layer diverter 141 in its feeding area for diverting the inner layer adhesive. The inner layer diversion groove 1415 extends circumferentially from the inner layer diversion protrusion and the total circumferential extension length reaches half the circumference of the inner layer diversion large diameter section 1411. When the inner layer diversion groove 1415 extends axially along the inner layer diversion large diameter section 1411 to the inner layer diversion small diameter section 1412, a material diversion protrusion is provided on the inner layer diversion small diameter section 1412 at a position corresponding to the groove opening of the inner layer diversion groove 1415, so that the inner layer adhesive flowing out from the inner layer diversion groove 1415 can cover the entire circumference of the inner layer diversion small diameter section 1412, thereby ensuring the integrity of the extruded inner layer insulation layer 41.

[0052] like Figure 5 and Figure 6 As shown, the inner layer diverter unit 14 also includes a ball-head core tube 142, a mold core 143, a spherical ring 144, a core tube cap 145, and a plurality of core tube adjusting bolts 146 (e.g., four). A core tube receiving cavity is formed in the inner layer diverter 141, extending through the axial direction of the inner layer diverter 141. A limiting protrusion ring 1414 is provided at the port of the core tube receiving cavity located at the flange ring 1413 of the inner layer diverter. The limiting protrusion ring 1414 is provided to protrude in a direction perpendicular to the end face of the flange ring 1413 of the inner layer diverter to form a cap receiving cavity suitable for accommodating the core tube cap 145. A plurality of core tube adjusting threaded holes (e.g., four) are provided on the side wall of the limiting protrusion ring 1414, extending through the side wall and capable of cooperating with the core tube adjusting bolts 146.

[0053] The ball-shaped core tube 142 is placed inside the core tube receiving cavity, and one end of the ball-shaped core tube 142 is provided with a ball-shaped abutment portion 1421 so that it can abut against the port of the core tube receiving cavity located at the inner layer diversion small diameter section 1412 (this port is set to be arc-shaped so as to match the ball-shaped abutment portion 1421 and facilitate the rotation of the ball-shaped abutment portion 1421). The ball-shaped abutment portion 1421 is formed with a receiving cavity suitable for accommodating the mold core 143. The first inlet channel 11 passes through the mold core 143 and the ball-shaped core tube 142. Axially, the other end of the ball-head core tube 142 is screwed to the core tube cap 145. The core tube cap 145 is placed in the cap receiving cavity, and the core tube adjusting bolt 146 can pass through the core tube adjusting threaded hole and abut against the core tube cap 145. A spherical ring 144 is provided between the core tube cap 145 and the end face of the inner layer distributor flange ring 1413. The center of the spherical ring 144 coincides with the center of the spherical head abutment part 1421. The abutment surface of the core tube cap 145 and the spherical ring 144 can be set as a matching arc surface, such as... Figure 2As shown, when multiple core tube adjusting bolts 146 are turned, the core tube cap 145 can move in the vertical and horizontal directions within the cap receiving cavity, so as to realize the pitch adjustment and left and right deflection adjustment of the mold core, thereby ensuring that the thickness of the extruded inner insulation layer 41 is uniform.

[0054] Furthermore, referring to Figure 7 and Figure 8 In one embodiment of the inner multi-color stripe double-layer co-extruded cable insulation extruder head of this application, the color stripe diverter 15 includes a color stripe diverter large-diameter section 151 and a color stripe diverter small-diameter section 152. A color stripe diverter flange ring 153 is provided at one end of the color stripe diverter large-diameter section 151, and a color stripe diverter groove 154 and an inner layer diverter feeding hole 155 are provided on the color stripe diverter large-diameter section 151. The outlet of the color stripe diverter groove 154 is located at the connection between the color stripe diverter large-diameter section 151 and the color stripe diverter small-diameter section 152, and as... Figure 7 As shown, the color strip diversion channel 154 can be configured with a color strip diversion protrusion extending axially along the color strip diverter in its feeding area for diverting colored adhesive. The color strip diversion channel 154 extends circumferentially from the color strip diversion protrusion along the large diameter section 151 of the color strip diversion channel. When the total circumferential extension reaches half the circumference of the large diameter section 151 of the color strip diversion channel, the color strip diversion channel 154 extends axially towards the small diameter section 152 of the color strip diversion channel. A material distribution protrusion is provided on the small diameter section 152 of the color strip diversion channel at a position corresponding to the opening of the color strip diversion channel 154, so that the colored adhesive flowing out of the color strip diversion channel 154 can cover the entire circumference of the small diameter section 152 of the color strip diversion channel, thereby ensuring the integrity of the extruded color strip insulation layer.

[0055] In addition, refer to Figure 8 and Figure 9 A stop ring 1521 is provided at the end of the color stripe distribution section 152 away from the color stripe distribution section 151. At the connection between the stop ring 1521 and the color stripe distribution section 152, multiple color stripe forming holes 1522 are provided, penetrating the sidewall of the color stripe distribution section 152 and arranged circumferentially along the color stripe distribution section 152. Each forming hole is connected to the inner layer rubber channel 12. The stop ring 1521 can abut against the inner wall of the first extruder body 16, so as to... Figure 2 As shown, when the colored rubber flows to the stop ring 1521, it can be stopped and its flow direction changed by the stop ring 1521, so that it flows from the color strip forming hole 1522 to the inner layer rubber channel 12, so that the colored rubber can be mixed with the inner layer rubber in advance. The mixed colored rubber and the inner layer rubber will pass through the constricted part of the inner layer rubber channel 12, so that the colored rubber and the inner layer rubber are not easy to separate.

[0056] Furthermore, referring to Figure 2In one embodiment of the inner multi-color stripe double-layer co-extrusion cable insulation extruder head of this application, the first extruder body 16 includes a machine body 161 and a machine body heating sleeve 162. The machine body heating sleeve 162 is sleeved on the machine body 161 so as to heat the machine body 161, the inner layer distributor 141 and the color stripe distributor 15, so that the rubber material in the inner layer distributor groove 1415 and the color stripe distributor groove 154 can maintain a flowing state and is not prone to clogging. The main body 161 is provided with a first feeding hole 1611 and a second feeding hole 1612. The first feeding hole 1611 is connected to the color bar diversion channel 154, and the second feeding hole 1612 is connected to the inner layer diversion feeding hole 155, so as to realize the feeding of the inner layer adhesive channel 12 and the color bar adhesive channel 13. The main body 161 is also provided with a connection hole that cooperates with the color bar diversion flange ring 153 and the inner layer diversion flange ring 1413, so that the connection between the three can be realized by screw fastening.

[0057] Furthermore, referring to Figure 2 In one embodiment of the inner multi-color stripe double-layer co-extruded cable insulation extruder head of this application, the second extrusion assembly 2 further includes an outer layer diversion unit 23 and a second body 24. A second inlet channel 21 is formed inside the outer layer diversion unit 23, and the second body 24 is sleeved on the outer layer diversion unit 23, with an outer layer adhesive channel 22 formed between the two.

[0058] Specifically, such as Figure 2 As shown, the outer layer diversion unit 23 includes an outer layer diversion component 231, a mold sleeve 232, and a mold sleeve cap 233; wherein, the outer layer diversion component 231 includes an outer layer diversion large diameter section 2311, an outer layer diversion small diameter section 2312, and an outer layer diversion groove 2313 disposed on the outer layer diversion large diameter section 2311, and the outlet of the outer layer diversion groove 2313 is disposed at the connection between the outer layer diversion large diameter section 2311 and the outer layer diversion small diameter section 2312, and as shown... Figure 10 As shown, the outer layer diversion groove 2313 can be configured with an outer layer diversion protrusion extending axially along the outer layer diverter in its feed area for diverting the outer layer adhesive. The outer layer diversion groove 2313 extends circumferentially from the outer layer diversion protrusion and the total circumferential extension length reaches half the circumference of the outer layer diversion large diameter section 2311. When the outer layer diversion groove 2313 extends axially from the outer layer diversion large diameter section 2311 to the outer layer diversion small diameter section 2312, a material diversion protrusion is provided on the outer layer diversion small diameter section 2312 at a position corresponding to the groove opening of the outer layer diversion groove 2313. This ensures that the outer layer adhesive flowing out of the outer layer diversion groove 2313 can cover the entire circumference of the outer layer diversion small diameter section 2312, thereby ensuring the integrity of the extruded outer layer insulation layer 43.

[0059] In addition, an internal thread adjustment hole 2314 is formed in the outer layer diverter 231. The mold sleeve 232 and the mold sleeve cap 233 can both be placed in the internal thread adjustment hole 2314. The mold sleeve cap 233 is provided with an external thread structure that matches the internal thread adjustment hole 2314. The second inlet channel 21 passes through the axial direction of the mold sleeve 232 and the mold sleeve cap 233. The mold sleeve 232 is located at the inlet end of the second inlet channel 21. The overall thickness of the outer layer insulation layer 43 can be adjusted by adjusting the mold sleeve 232 and the mold sleeve cap 233. This makes it less likely for the outer layer insulation layer 43 to be damaged or discontinuous. In addition, the outer layer diverter 231 is provided with an outer flange structure so that it can be connected to the second body 24 by screwing.

[0060] Furthermore, referring to Figure 2 In one embodiment of the inner multi-color stripe double-layer co-extrusion cable insulation extruder head of this application, the second body 24 includes a second body body 241, a calibration ring 242, multiple calibration bolts 243, and a second body heating sleeve 244. The second body heating sleeve 244 is sleeved on the second body body 241 to heat the second body body 241 and the outer layer diverter 231, thereby ensuring that the outer layer rubber material in the outer layer diverter groove 2313 remains in a flowing state and is not prone to clogging. The second body body 241 may be provided with a second body connection hole that matches the outer flange structure. The second body connection hole may be set to penetrate the axial direction of the second body body 241, and a threaded hole that matches the second body connection hole may be provided on the first body body 161, so that the bolt can penetrate the outer flange structure second body body 241 and be screwed into the threaded hole on the first body body to realize the connection between the first extrusion assembly 1 and the second extrusion assembly 2.

[0061] In addition, the second body 241 is provided with an outer layer feeding hole 2411 and multiple calibration holes. The outer layer feeding hole 2411 can communicate with the outer layer adhesive channel 22 to realize the feeding of the outer layer adhesive channel 22. The calibration holes penetrate the second body 241 radially and correspond to the outer layer diversion small diameter section 2312. The calibration ring 242 is sleeved on the outer layer diversion small diameter section 2312, and one side of the calibration ring 242 abuts against the second body 241, and the other side abuts against the temperature control component 3. Multiple calibration bolts 243 are adapted to pass through the calibration holes and abut against the calibration ring 242, so that the position of the calibration ring 242 can be adjusted by turning the multiple calibration bolts 243, so that the thickness of the outer layer insulation layer 43 can be made more uniform.

[0062] The implementation principle of the inner multi-color stripe double-layer co-extrusion cable insulation extruder head according to an embodiment of this application is as follows: the first extrusion component 1 is suitable for extruding the inner insulation layer 41, and the second extrusion component 2 is suitable for extruding the outer insulation layer. The first extrusion component 1 and the second extrusion component 2 are connected, and a temperature control component 3 is set at the connection between the two. The temperature control component 3 heats the inner layer adhesive channel 12 of the inner insulation layer 41 and the outer layer adhesive channel 22 of the outer insulation layer at different temperatures. This allows the conductor 4 to be covered with the outer insulation layer 43 before the inner insulation layer 41 is fully cured. This allows the inner and outer insulation layers to be better bonded together, making it less likely for poor bonding and easy delamination to occur, resulting in higher quality cables.

[0063] The inner multi-color stripe double-layer co-extrusion cable insulation extruder head has a compact structure and can extrude two insulation layers at once. Therefore, only one inner multi-color stripe double-layer co-extrusion cable insulation extruder head is needed to complete the work of two cable insulation extruders that can only extrude single-layer insulation layers. This can save costs and improve production efficiency.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An extruder head for a double-layer co-extruded cable insulation layer with an inner multi-colored stripe, characterized in that: It includes a first extrusion assembly (1), a second extrusion assembly (2), and a temperature control assembly (3); The first extrusion assembly (1) is provided with a first inlet channel (11) suitable for the wire (4) to pass through and an inner layer rubber channel (12). The inner layer rubber channel (12) is connected to the inner layer pumping device, and the outlet of the inner layer rubber channel (12) is located at the outlet end of the first inlet channel (11). The second extrusion assembly (2) is provided with a second inlet channel (21) and an outer layer rubber channel (22) suitable for the wire (4) to pass through. The outer layer rubber channel (22) is connected to the outer layer pumping device, and the outlet of the outer layer rubber channel (22) is located at the inlet end of the second inlet channel (21). The temperature control component (3) is located between the outlet end of the first inlet channel (11) and the inlet end of the second inlet channel (21), and the temperature control component (3) is adapted to heat the inner layer rubber channel (12) and the outer layer rubber channel (22) at different temperatures; the first extrusion assembly (1) also includes a color stripe rubber channel (13), an inner layer diversion unit (14), a color stripe diversion component (15) and a first extruder body (16), the color stripe rubber channel (13) is connected to the color stripe pump device, and the outlet of the color stripe rubber channel (13) is connected to the inner layer rubber channel (12); the first inlet channel (11) is formed inside the inner layer diversion unit (14). The color stripe diverter (15) is sleeved on the inner layer diverter unit (14), and the inner layer rubber channel (12) is formed between the color stripe diverter (15) and the inner layer diverter unit (14); the first extruder body (16) is sleeved on the color stripe diverter (15), and the color stripe rubber channel (13) is formed between the first extruder body (16) and the color stripe diverter (15); the inner layer diverter unit (14) includes an inner layer diverter (141), the inner layer diverter (141) includes an inner layer diverter large diameter section (1411) and an inner layer diverter small diameter section (1412), and the inner layer diverter is provided at the end of the inner layer diverter large diameter section (1411). A flange ring (1413) is provided, and an inner layer diversion groove (1415) is provided on the inner layer diversion large diameter section (1411). The outlet of the inner layer diversion groove (1415) is located at the connection between the inner layer diversion large diameter section (1411) and the inner layer diversion small diameter section (1412). The color strip diversion component (15) includes a color strip diversion large diameter section (151) and a color strip diversion small diameter section (152). A color strip diversion flange ring (153) is provided at one end of the color strip diversion large diameter section (151), and a color strip diversion groove (154) and an inner layer diversion feeding hole (155) are provided on the color strip diversion large diameter section (151). The outlet of the color strip diversion groove (154) is located at the connection between the inner layer diversion large diameter section (1411) and the inner layer diversion small diameter section (1412). At the connection between the large diameter section (151) and the small diameter section (152) of the color stripe diversion, a stop ring (1521) is provided at one end of the small diameter section (152) of the color stripe diversion away from the large diameter section (151). At the connection between the stop ring (1521) and the small diameter section (152), a plurality of color stripe forming holes (1522) are provided, which penetrate the side wall of the small diameter section (152) of the color stripe diversion and are arranged circumferentially along the small diameter section (152). Each of the color stripe forming holes (1522) is connected to the inner layer adhesive channel (12). The inner layer diversion feeding hole (155) is connected to the inlet of the inner layer diversion groove (1415).

2. The extruder head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe as described in claim 1, characterized in that: The inner layer diversion unit (14) also includes a ball-head core tube (142), a mold core (143), a spherical ring (144), a core tube cap (145), and multiple core tube adjusting bolts (146). The inner layer distributor (141) has an axial core tube receiving cavity extending through the inner layer distributor (141). A limiting protrusion (1414) is provided at the port of the core tube receiving cavity located at the flange ring (1413) of the inner layer distributor. The limiting protrusion (1414) protrudes in a direction perpendicular to the end face of the flange ring (1413) of the inner layer distributor to form a cap receiving cavity suitable for accommodating the core tube cap (145). The side wall of the limiting protrusion (1414) is provided with a plurality of core tube adjusting thread holes extending through the side wall and capable of cooperating with the core tube adjusting bolt (146). The ball-head core tube (142) is placed inside the core tube receiving cavity. One end of the ball-head core tube (142) is provided with a ball-head abutment part (1421) to abut against the port of the core tube receiving cavity located at the inner layer diverter small diameter section (1412) via the ball-head abutment part (1421). The other end of the ball-head core tube (142) is connected to the core tube cap (145). The core tube cap (145) is placed inside the cap receiving cavity. The spherical ring (144) is provided between the core tube cap (145) and the end face of the inner layer diverter flange ring (1413). The core tube adjusting bolt (146) can pass through the core tube adjusting threaded hole and abut against the core tube cap (145). The ball head abutment portion (1421) has a receiving cavity suitable for accommodating the mold core (143), and the first inlet channel (11) passes through the mold core (143) and the ball head core tube (142) axially.

3. The extruder head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe, as described in claim 2, is characterized in that: The first extruder body (16) includes a body body (161) and a body heating sleeve (162), the body heating sleeve (162) being fitted onto the body body (161); the body body (161) is provided with a first feed hole (1611) and a second feed hole (1612), the first feed hole (1611) being connected to the color bar diverter groove (154), the second feed hole (1612) being connected to the inner layer diverter feed hole (155), and the body body (161) is also provided with a connecting hole that cooperates with the color bar diverter flange ring (153) and the inner layer diverter flange ring (1413).

4. The extruder head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe as described in claim 1, characterized in that: The second extrusion assembly (2) further includes an outer layer diversion unit (23) and a second body (24). The outer layer diversion unit (23) has a second inlet channel (21) inside. The second body (24) is fitted onto the outer layer diversion unit (23), and the outer layer rubber channel (22) is formed between the two.

5. The extruder head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe as described in claim 4, characterized in that: The outer layer diversion unit (23) includes an outer layer diversion component (231), a mold sleeve (232), and a mold sleeve cap (233); the outer layer diversion component (231) includes an outer layer diversion large diameter section (2311), an outer layer diversion small diameter section (2312), and an outer layer diversion groove (2313) disposed on the outer layer diversion large diameter section (2311). The outlet of the outer layer diversion groove (2313) is disposed at the connection between the outer layer diversion large diameter section (2311) and the outer layer diversion small diameter section (2312). The component (231) also has an internal thread adjustment hole (2314). The mold sleeve (232) and the mold sleeve cap (233) can both be placed in the internal thread adjustment hole (2314). The mold sleeve cap (233) is provided with an external thread structure that matches the internal thread adjustment hole (2314). The second inlet channel (21) passes through the axial direction of the mold sleeve (232) and the mold sleeve cap (233). The mold sleeve (232) is located at the entrance end of the second inlet channel (21).

6. The extruder head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe as described in claim 5, characterized in that: The second body (24) includes a second body body (241), a calibration ring (242), multiple calibration bolts (243), and a second body heating sleeve (244). The second body heating sleeve (244) is fitted onto the second body body (241). The second body body (241) is provided with an outer layer feeding hole (2411) and multiple calibration holes. The outer layer feeding hole (2411) is connected to the outer layer adhesive channel (22). The calibration holes correspond to the outer layer diversion small diameter section (2312). The calibration ring (242) is fitted onto the outer layer diversion small diameter section (2312). One side of the calibration ring (242) abuts against the second body body (241), and the other side abuts against the temperature control component (3). The multiple calibration bolts (243) are adapted to pass through the calibration holes and abut against the calibration ring (242).

7. An extruder head for a double-layer co-extruded cable insulation layer with an inner multi-color stripe according to any one of claims 1 to 6, characterized in that: The temperature control component (3) includes 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 inlet pipe (321), a first heat medium outlet pipe (322), a second heat medium inlet pipe (323), and a second heat medium outlet pipe (324). The first heat medium inlet pipe (321) and the first heat medium outlet pipe (322) are connected to the first heating chamber (311), and the first heating chamber (311) is adapted to heat the inner layer adhesive channel (12). The second heating chamber (312) is located for heating the outer layer adhesive channel (22).

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