CN218966093U - Extrusion die for foaming type insulating cable core - Google Patents
Extrusion die for foaming type insulating cable core Download PDFInfo
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- CN218966093U CN218966093U CN202222875128.5U CN202222875128U CN218966093U CN 218966093 U CN218966093 U CN 218966093U CN 202222875128 U CN202222875128 U CN 202222875128U CN 218966093 U CN218966093 U CN 218966093U
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Abstract
The utility model discloses an extrusion die for a foaming type insulating cable core, which comprises an inner die core and an outer die sleeve, wherein a conductor threading hole is formed in the middle of the inner die core, a conical hole is formed in the outer die sleeve, and a plurality of extrusion holes which are circumferentially arranged at intervals with the axis of the conductor threading hole as the center are formed in one end of the outer die sleeve. The inner die core is arranged in the conical hole of the outer die sleeve, so that a material passing channel is formed between the inner die core and the outer die sleeve. The molten plastic is extruded through the extrusion holes, gaps are formed among the extruded plastics in the extrusion holes, then the plastics are gradually foamed and expanded in the extrusion process, the plastics are mutually close to each other in the expansion process so that the gaps gradually decrease until the gaps disappear, and finally the foaming material is uniformly and tightly adhered to the outer periphery side of the inner conductor. The structural design mode can ensure that molten plastic can be uniformly molded under the condition of larger foaming multiplying power, and the primary extrusion molding is adopted, so that the phenomenon of uneven structure generated by the traditional secondary or multiple extrusion process is avoided, and the influence on the quality of the cable is reduced.
Description
Technical Field
The utility model relates to the technical field of cable core manufacturing dies, in particular to an extrusion die for a foaming type insulating cable core.
Background
The cable core extrusion die is a processing die which is used for extruding molten plastics to form through the extrusion machine head matched with the inner die and the outer die, and finally, a cable core insulating layer is formed on the inner conductor. The usual production method of the cable core insulating layer in the prior art is as follows: the melt plastic flows through a circular die opening between the outer circle of the die core and the inner circle of the die sleeve to be extruded.
For example, chinese patent application publication No. CN102368413a discloses an automatic core-fixing extrusion die for optical cable sheath coating, which consists of a die sleeve and a die core, wherein the circumference of a cylindrical boss of the die core is provided with uniformly distributed runner holes, and softened sheath material or insulating material is uniformly extruded and molded in a heating state. The above structural design mode can realize the extrusion operation of molten plastics through an inner die and an outer die, but has the following defects and disadvantages:
when the thickness of the insulating layer of the coaxial cable is required to be larger and the size of the inner conductor is required to be smaller (for example, a fog compact shielding communication cable, a 75 ohm leakage coaxial cable and the like), if the extrusion molding mode is adopted, the insulating layer is difficult to keep round and tight adhesion on the inner conductor due to the large self weight and foaming degree after the insulating layer is discharged from the mold; if the insulating layer is extruded for two or more times, the dielectric constant of the insulating layer extruded for two or more times is difficult to be consistent in actual production, the outer diameter is also more uneven, and the cable quality is finally directly influenced.
Therefore, there is a need in the art to invent an extrusion die suitable for large-sized insulating layer cable cores.
Disclosure of Invention
In order to solve the technical problem that the traditional extrusion die cannot meet the processing requirement of large insulation layer thickness in the prior art, the utility model provides the extrusion die for the foaming type insulation cable core, which has the characteristics of simple and reasonable structural design, suitability for large-size cable cores, high quality of processed and molded cable cores and the like.
The utility model adopts the technical proposal for solving the problems that:
an extrusion die for a foamed insulated cable core, comprising:
the middle part of the inner die core is provided with a conductor threading hole;
the outer die sleeve is internally provided with a conical hole, and one end of the outer die sleeve is provided with a plurality of extrusion holes which are circumferentially arranged at intervals by taking the axis of the conductor threading hole as the center;
the inner die core is arranged in the conical hole of the outer die sleeve, so that a material passing channel is formed between the inner die core and the outer die sleeve, and the material passing channel is communicated with the extrusion hole.
Further, the size of the material passing channel is sequentially reduced from one end far from the extrusion hole to one end close to the extrusion hole.
Further, the extrusion holes are round holes, square holes or strip-shaped holes.
In a second embodiment of the present utility model, a technical solution related to a specific structural arrangement of a water cooling module is provided.
The extrusion die for the foaming type insulating cable core further comprises a water cooling module, wherein the water cooling module comprises a water cooling outer pipe and a water cooling inner pipe arranged inside the water cooling outer pipe, a shaping channel communicated with the extrusion hole and the conductor threading hole is arranged inside the water cooling inner pipe, and a water passing channel is arranged between the water cooling outer pipe and the water cooling inner pipe.
Further, annular protrusions are arranged on the outer peripheral sides of two ends of the water-cooling inner tube, the water passing channel is arranged between the annular protrusions, and a sealing ring is arranged between the annular protrusions and the inner wall of the water-cooling outer tube.
Further, the two ends of the water-cooling outer tube are respectively provided with a water inlet and a water outlet, the water inlet is used for being communicated with the water passing channel and the water inlet pipe, and the water outlet is used for being communicated with the water passing channel and the water outlet pipe.
Further, spiral blades in spiral distribution are arranged on the outer peripheral side of the water cooling inner tube, spiral water flow grooves are formed between adjacent spiral blades, and the spiral water flow grooves are communicated with the water inlet and the water outlet.
In a third embodiment of the present utility model, a technical solution is disclosed regarding a specific structural arrangement of the first connection portion and the second connection portion.
The water-cooling outer pipe is characterized in that a first connecting portion is arranged at one end of the outer water-cooling outer pipe, which faces the outer water-cooling outer pipe, a second connecting portion is arranged at one end of the outer water-cooling outer pipe, which faces the outer water-cooling outer pipe, and the first connecting portion and the second connecting portion are fixedly connected together.
Further, the extrusion die for the foam insulation cable core further comprises a connecting piece, wherein the first connecting portion and the second connecting portion are respectively of flange structures formed by extending and protruding the outer die sleeve and the water-cooling outer tube towards the outer side, and the connecting piece penetrates through the first connecting portion and the second connecting portion so as to fixedly connect the first connecting portion and the second connecting portion together.
Further, an external thread is arranged on the outer peripheral side of the first connecting part, an internal thread is arranged on the inner peripheral side of the second connecting part, the second connecting part is sleeved on the outer peripheral side of the first connecting part, and the first connecting part and the second connecting part are in threaded connection;
or, the outer periphery side of the second connecting portion is provided with external threads, the inner periphery side of the first connecting portion is provided with internal threads, the first connecting portion is sleeved on the outer periphery side of the second connecting portion, and the first connecting portion is in threaded connection with the second connecting portion.
In summary, compared with the prior art, the extrusion die for the foaming type insulating cable core provided by the utility model has at least the following technical effects:
1) In the extrusion die for the foaming type insulating cable core, the outlet of the foaming material of the insulating layer of the cable core is a plurality of extrusion holes which are distributed around the center circumference of the outer die sleeve at intervals, molten plastics in the material passing channel are extruded through the extrusion holes, gaps are formed among the plastics extruded by the extrusion holes at the beginning (due to the interval arrangement of the extrusion holes), then the plastics are gradually foamed and expanded in the extrusion process, the molten plastics discharged from the extrusion holes gradually release pressure under the atmospheric pressure, the plastics are mutually close to each other in the expansion process, the gaps gradually decrease until the gaps disappear, and finally the foaming material is approximately round and is uniformly and tightly adhered to the outer periphery of the inner conductor; the structural design mode can ensure that molten plastic can be uniformly molded under the condition of larger foaming multiplying power (namely, larger requirement on the size of the insulating layer of the cable core), and the structure non-uniformity phenomenon generated by the insulating layer during the production of the traditional secondary or multiple extrusion process is avoided by adopting one-step extrusion molding, so that the influence on the quality of the cable is reduced.
2) In the extrusion die for the foaming type insulated cable core, the diameter of the section of the extrusion hole and the distance between the two extrusion holes which are oppositely arranged determine the outer diameter of the foaming material after cooling and shaping, and the larger the diameter of the extrusion hole is, the larger the distance between the two extrusion holes which are oppositely arranged is, the larger the outer diameter of the shaping after foaming and cooling is, otherwise, the smaller the outer diameter of the shaping is; through above structural design mode, can improve cable core insulating layer foaming outside diameter after through the size of design extrusion hole and the distance between the extrusion hole of relative setting, when guaranteeing that the foaming material of molten plastics evenly surrounds around the inner conductor, can also have great diameter, be applicable to jumbo size insulating layer cable core.
Drawings
FIG. 1 is a side cross-sectional view of an inner mold core and outer mold sleeve of the present utility model;
FIG. 2 is a side view of the inner mold core and outer mold sleeve of the present utility model;
FIG. 3 is a side cross-sectional view of an extrusion die for a foamed insulated cable core of the present utility model;
FIG. 4 is an enlarged partial schematic view H of FIG. 3;
FIG. 5 is a side cross-sectional view of a water cooling module of the present utility model;
wherein the reference numerals have the following meanings:
1. an inner mold core; 11. a conductor threading hole; 2. an outer die sleeve; 21. extruding the hole; 22. a first connection portion; 3. a material passing channel; 4. water-cooling the outer tube; 41. a water inlet; 42. a water outlet; 43. a second connecting portion; 5. water-cooling the inner tube; 51. a shaping channel; 52. an annular protrusion; 6. a water passing channel; 7. a seal ring; 8. a connecting piece; 9. a helical blade; 91. spiral water launder.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.
In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Example 1
Referring to fig. 1 to 3, according to a first embodiment of the present utility model, an extrusion die for a foamed insulated cable core includes an inner core 1, and a conductor threading hole 11 is provided in the middle of the inner core 1. The conductor threading holes 11 are used for allowing the inner conductors of the cable to pass through and have a fixing effect on the inner conductors, so that molten plastic uniformly surrounds the inner conductors after extrusion, and a finished cable product is formed.
The extrusion die for the foam-type insulated cable core further comprises an outer die sleeve 2, wherein conical holes are formed in the outer die sleeve 2, and a plurality of extrusion holes 21 which are circumferentially arranged at intervals with the axis of the conductor threading hole 11 as the center are formed in one end of the outer die sleeve 2. The extrusion holes 21 are used for extruding the molten plastic and surrounding the inner conductor, so that the extrusion holes 21 are circumferentially arranged on the outer die sleeve 2 at intervals by taking the axis of the conductor threading hole 11 as the center, and the uniformity of the extruded molten plastic and the uniformity of the outer periphery of the inner conductor can be improved.
In the technical solution of this embodiment, the inner die core 1 is disposed in a tapered hole of the outer die sleeve 2, so that a material passing channel is formed between the inner die core 1 and the outer die sleeve 2, and the material passing channel 3 is communicated with the extrusion hole 21. Specifically, the outlet of the foaming material of the cable core insulating layer is a plurality of extrusion holes 21 distributed around the center circumference of the outer mold sleeve 2 at intervals, the material passing channel 3 is externally connected with a plastic extrusion device, molten plastic in the material passing channel is extruded through the extrusion holes 21, gaps are formed between the plastics extruded by the extrusion holes 21 (due to the interval arrangement of the extrusion holes 21), the plastics are gradually foamed and expanded in the extrusion process, the molten plastics discharged from the extrusion holes 21 gradually release pressure under the atmospheric pressure, the plastics are mutually close to each other in the expansion process, the gaps gradually decrease until the gaps disappear, and finally the foaming material is approximately round (but not the shape of a final finished product, and a cooling and shaping process is further carried out) and is uniformly and tightly adhered on the outer periphery of the inner conductor. Through the structural design mode, the molten plastic can be uniformly molded under the condition of larger foaming multiplying power (namely, larger requirement on the size of the insulating layer of the cable core), and the structure non-uniformity phenomenon generated by the insulating layer during the production of the traditional secondary or multiple extrusion process is avoided by adopting one-step extrusion molding, so that the influence on the quality of the cable is reduced.
More specifically, the diameter of the cross section of the extrusion hole 21 and the distance between the two extrusion holes 21 disposed opposite to each other (i.e., the extrusion holes 21 disposed opposite to each other at both ends of the axis of the conductor threading hole 11) determine the outer diameter of the foam after cooling and the larger the diameter of the extrusion hole 21, the larger the distance between the two extrusion holes 21 disposed opposite to each other, and the larger the outer diameter of the foam after cooling and the smaller the diameter. Through above structural design mode, can improve cable core insulating layer foaming outside diameter through the size of designing extrusion hole 21 and the distance between the extrusion hole 21 of relative setting, when guaranteeing that the foaming material of molten plastics evenly surrounds around the inner conductor, can also have great diameter, be applicable to the production manufacturing of jumbo size insulating layer cable core.
Referring to fig. 1 and 3, in an alternative of this embodiment, the size of the overfeeding passage 3 decreases sequentially from one end away from the extrusion orifice 21 to one end close to the extrusion orifice 21. By this structural design, the extrusion pressure and extrusion speed of the molten plastic at the extrusion hole 21 can be increased, and the uniformity of the plastic surrounding the inner conductor can be further improved.
In another alternative of this embodiment, as shown in fig. 2, the extrusion holes 21 are circular holes, square holes or bar holes, and the above hole positions can form gaps between the molten plastics extruded from the respective extrusion holes 21, so as to ensure sufficient expansion space for foaming.
Example 2
In a second embodiment of the present utility model, a technical solution related to a specific structural arrangement of a water cooling module is provided.
Referring to fig. 3, in the technical scheme of this embodiment, the extrusion die for a foamed insulation cable core further includes a water cooling module, the water cooling module includes a water cooling outer tube 4 and a water cooling inner tube 5, a shaping channel 51 communicating with the extrusion hole 21 and the conductor threading hole 11 is provided in the water cooling inner tube 5, and a water passing channel 6 is provided between the water cooling outer tube 4 and the water cooling inner tube 5. After the molten plastic is extruded through the extrusion hole 21 and is foamed around the inner conductor, the shape of the molten plastic is still not regular round, and the molten plastic needs to be shaped under the cooling effect of the water cooling module. Specifically, the water channel 6 between the water-cooling outer tube 4 and the water-cooling inner tube 5 is used for allowing constant temperature cooling water of about 10 ℃ to pass through, when the inner conductor and foaming materials on the outer periphery side of the inner conductor enter the shaping channel 51 in the water-cooling inner tube 5, the round inner side wall of the water-cooling inner tube 5 can ensure the roundness of the cable core, so that the cable core can be rapidly cooled and shaped, a cable finished product is finally formed, and the structural design is simple and reasonable.
In a preferred embodiment of this embodiment, as shown in fig. 3 and 4, annular protrusions 52 are disposed on the outer peripheral sides of both ends of the water-cooled inner tube 5, the water passing channel 6 is disposed between the annular protrusions 52, and a sealing ring 7 is disposed between the annular protrusions 52 and the inner wall of the water-cooled outer tube 4. In particular, the annular protrusion 52 serves to provide a mounting structural basis for the sealing ring 7, and this structural design allows a significant reduction in the thickness dimension of the sealing ring 7 selected compared to mounting the sealing ring 7 directly between the water-cooled outer tube 4 and the water-cooled inner tube 5. The sealing ring 7 is used for sealing the water-cooling outer pipe 4 and the water-cooling inner pipe 5, and preventing water from leaking out of the water channel 6. More specifically, the seal ring 7 may be an O-ring seal.
In another preferred mode of this embodiment, as shown in fig. 3, both ends of the water-cooled outer tube 4 are respectively provided with a water inlet 41 and a water outlet 42, the water inlet 41 is used for communicating the water passing channel 6 with an external water inlet pipe, and the water outlet 42 is used for communicating the water passing channel 6 with an external water outlet pipe. The water inlet 41 is used for introducing cooling water into the water channel 6, the water outlet 42 is used for discharging the cooling water in the water channel 6, and the discharged cooling water can be introduced from the water inlet 41 again after being cooled by the heat exchange equipment, so that the water channel 6 forms cooling water circulation, and the cooling and shaping effects on plastics (foaming materials) are improved.
In another preferred embodiment of this embodiment, as shown in fig. 5, spiral blades 9 are spirally distributed on the outer peripheral side of the water-cooled inner tube 5, and spiral water grooves 91 are formed between adjacent spiral blades 9, and the spiral water grooves 91 are communicated with the water inlet 41 and the water outlet 42. Specifically, by providing the spiral water flow groove 91, on the one hand, it is ensured that the water flow direction in the water passage 6 is constant, that is, the water flow direction flows from the water inlet 41 to the water outlet 42; on the other hand, the flow speed of water flow in the water channel 6 can be slowed down, so that the cooling water and the plastic in the shaping channel 51 can exchange heat fully, and the cooling shaping effect on the plastic (foaming material) is further improved.
Example 3
In the third embodiment of the present utility model, a technical solution concerning the specific structural arrangement of the first connecting portion 22 and the second connecting portion 43 is disclosed.
Referring to fig. 3 and fig. 4, in the technical solution of this embodiment, a first connecting portion 22 is disposed at an end of the outer mold sleeve 2 facing the water-cooled outer tube 4, a second connecting portion 43 is disposed at an end of the water-cooled outer tube 4 facing the outer mold sleeve 3, and the first connecting portion 22 and the second connecting portion 43 are fixedly connected together, so that the outer mold sleeve 2, the water-cooled outer tube 4 and the water-cooled inner tube 5 are adjacently disposed, and molten plastic in the material passing channel 3 directly enters the shaping space 51 inside the water-cooled inner tube 5 after passing through the extrusion hole 21.
Referring to fig. 4, in an alternative embodiment, the extrusion die for a foamed insulation cable core further includes a connecting member 8, the first connecting portion 22 and the second connecting portion 43 are respectively flange structures formed by extending and protruding the outer jacket 2 and the water-cooled outer tube 4 towards the outside, and the connecting member 8 passes through the first connecting portion 22 and the second connecting portion 32 to fixedly connect the first connecting portion 22 and the second connecting portion 43 together. Specifically, the connecting piece 8 may be a member such as a bolt, a screw, or a screw, and screwed into the screw holes of the first connecting portion 22 and the second connecting portion 43, and then screwed together with a member such as a nut, so that the fixed assembly connection between the first connecting portion 22 and the second connecting portion 43 can be completed, and the structural design is simple and reasonable.
In another alternative of this embodiment (not shown in the drawings), the outer peripheral side of the first connecting portion 22 is provided with an external thread, the inner peripheral side of the second connecting portion 43 is provided with an internal thread, the second connecting portion 43 is fitted around the outer peripheral side of the first connecting portion 22, and the first connecting portion 22 and the second connecting portion 43 are screwed.
In another alternative of this embodiment (not shown in the drawings), the outer peripheral side of the second connecting portion 43 is provided with an external thread, the inner peripheral side of the first connecting portion 22 is provided with an internal thread, the first connecting portion 22 is sleeved on the outer peripheral side of the second connecting portion 43, and the first connecting portion 22 and the second connecting portion 43 are screwed.
Specifically, through the assembly mode of the two threaded connections, the coaxiality among the water-cooling outer pipe 4, the water-cooling inner pipe 5, the inner mold core 1 and the outer mold sleeve 2 can be improved, the assembly is simple and convenient, and the convenience of assembly and disassembly operations such as maintenance and replacement of the cold water module can be improved.
In summary, the outlet of the foam material of the cable core insulating layer provided by the utility model is a plurality of extrusion holes 21 distributed around the center circumference of the outer mold sleeve 2 at intervals, the molten plastic in the material passing channel 3 is extruded through the plurality of extrusion holes 21, gaps are formed between the plastics extruded by the extrusion holes 21 at the beginning (due to the interval arrangement of the extrusion holes), then the plastics are gradually foamed and expanded in the extrusion process, the molten plastic from the extrusion holes 21 gradually releases pressure under the atmospheric pressure, the plastics approach each other in the expansion process so that the gaps gradually decrease until the gaps disappear, and finally the foam material is approximately round and uniformly and tightly adhered to the outer periphery of the inner conductor. Through the structural design mode, the molten plastic can be uniformly molded under the condition of larger foaming multiplying power (namely, larger requirement on the size of the insulating layer of the cable core), and the structure non-uniformity phenomenon generated by the insulating layer during the production of the traditional secondary or multiple extrusion process is avoided by adopting one-step extrusion molding, so that the influence on the quality of the cable is reduced.
In addition, the diameter of the cross section of the extrusion hole 21 and the distance between the two extrusion holes 21 which are oppositely arranged determine the outer diameter of the formed foam after cooling, and the larger the diameter of the extrusion hole 21 is, the larger the distance between the two extrusion holes 21 which are oppositely arranged is, the larger the formed outer diameter of the formed foam after cooling is, and otherwise, the smaller the outer diameter of the formed foam after cooling is. Through above structural design mode, can improve cable core insulating layer foaming outside diameter through the size of designing extrusion hole 21 and the distance between the extrusion hole 21 of relative setting, when guaranteeing that the foaming material of molten plastics evenly surrounds around the inner conductor, can also have great diameter, be applicable to the production manufacturing of jumbo size insulating layer cable core.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (10)
1. An extrusion die for a foamed insulating cable core, comprising:
the middle part of the inner die core is provided with a conductor threading hole;
the outer die sleeve is internally provided with a conical hole, and one end of the outer die sleeve is provided with a plurality of extrusion holes which are circumferentially arranged at intervals by taking the axis of the conductor threading hole as the center;
the inner die core is arranged in the conical hole of the outer die sleeve, so that a material passing channel is formed between the inner die core and the outer die sleeve, and the material passing channel is communicated with the extrusion hole.
2. The extrusion die for a foamed insulation cable core according to claim 1, wherein the size of the overfeeding passage decreases in order from an end distant from the extrusion hole to an end close to the extrusion hole.
3. The extrusion die for a foam insulation cable core according to claim 1, wherein the extrusion holes are circular holes, square holes or bar holes.
4. The extrusion die for the foamed insulating cable core according to claim 1, further comprising a water cooling module, wherein the water cooling module comprises a water cooling outer pipe and a water cooling inner pipe arranged inside the water cooling outer pipe, a shaping channel communicated with the extrusion hole and the conductor threading hole is arranged inside the water cooling inner pipe, and a water passing channel is arranged between the water cooling outer pipe and the water cooling inner pipe.
5. The extrusion die for foam insulation cable cores according to claim 4, wherein annular protrusions are arranged on outer peripheral sides of two ends of the water-cooling inner tube, the water passing channel is arranged between the annular protrusions, and a sealing ring is arranged between the annular protrusions and the inner wall of the water-cooling outer tube.
6. The extrusion die for foam insulation cable cores according to claim 5, wherein two ends of the water-cooled outer tube are respectively provided with a water inlet and a water outlet, the water inlet is used for communicating the water passing channel and the water inlet pipe, and the water outlet is used for communicating the water passing channel and the water outlet pipe.
7. The extrusion die for foam insulation cable cores according to claim 6, wherein spiral blades are spirally distributed on the outer peripheral side of the water-cooled inner tube, spiral water flow grooves are formed between adjacent spiral blades, and the spiral water flow grooves are communicated with the water inlet and the water outlet.
8. The extrusion die for foam insulation cable cores according to claim 4, wherein a first connecting portion is provided at an end of the outer jacket facing the water-cooled outer tube, a second connecting portion is provided at an end of the water-cooled outer tube facing the outer jacket, and the first connecting portion and the second connecting portion are fixedly connected together.
9. The extrusion die for a foamed insulated cable core according to claim 8, further comprising a connecting member, wherein the first connecting portion and the second connecting portion are flange structures formed by extending the outer jacket and the water-cooled outer tube toward the outside, respectively, and the connecting member penetrates the first connecting portion and the second connecting portion to fixedly connect the first connecting portion and the second connecting portion together.
10. The extrusion die for a foam insulation cable core according to claim 8, wherein an outer peripheral side of the first connecting portion is provided with an external thread, an inner peripheral side of the second connecting portion is provided with an internal thread, the second connecting portion is sleeved on the outer peripheral side of the first connecting portion, and the first connecting portion and the second connecting portion are in threaded connection;
or, the outer periphery side of the second connecting portion is provided with external threads, the inner periphery side of the first connecting portion is provided with internal threads, the first connecting portion is sleeved on the outer periphery side of the second connecting portion, and the first connecting portion is in threaded connection with the second connecting portion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222875128.5U CN218966093U (en) | 2022-10-28 | 2022-10-28 | Extrusion die for foaming type insulating cable core |
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| CN202222875128.5U CN218966093U (en) | 2022-10-28 | 2022-10-28 | Extrusion die for foaming type insulating cable core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117681506A (en) * | 2024-01-13 | 2024-03-12 | 红岛实业（英德）有限公司 | High-strength light composite board and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117681506A (en) * | 2024-01-13 | 2024-03-12 | 红岛实业（英德）有限公司 | High-strength light composite board and preparation process thereof |
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