Cable extrusion die and extrusion molding equipment
The cable extrusion die with a detachable forming head solves the problem of producing multiple specifications of cables with a single die, improves the versatility of the die and production efficiency, and reduces the cost of cable production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TBEA XINJIANG CABLE CO LTD
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-10
AI Technical Summary
In current cable production, an extrusion die can typically only produce one type of cable, leading to the need to design multiple die models, which increases production costs and management complexity.
Design a cable extrusion die, including a detachable forming head and die core structure, which can be adapted to the production of cables of different specifications by replacing different types of forming heads, thereby improving the versatility of the die body.
It reduces mold design and manufacturing costs, improves production efficiency and overall cable production costs, and adapts to the production needs of various cable specifications.
Smart Images
Figure CN224103488U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to cable production mould technical field especially relates to a cable extrusion mould and extrusion equipment. BACKGROUND
[0002] In the production process of the cable, a layer of insulation layer needs to be attached to the surface of the core after the core production is completed, and the setting of the insulation layer is realized through the insulation layer extrusion process, wherein the cable extrusion mould is the core device of the process. At present, the common type of extrusion mould is extrusion type or semi-extrusion type, and each specification of extrusion mould can usually only process one specification of cable, and if multiple specifications of cable need to be processed, multiple types of extrusion mould need to be designed, so that the comprehensive cost of cable processing production is increased.
[0003] Therefore, the utility model provides a cable extrusion mould and extrusion equipment to solve or at least alleviate the above technical problems. SUMMARY
[0004] The main purpose of the utility model is to provide a cable extrusion mould and extrusion equipment, which aims to reduce the production cost of cable when facing the working condition of producing different specifications of cable.
[0005] To achieve the above purpose, the utility model provides a cable extrusion mould for the insulation layer extrusion process of the cable, which comprises a core and comprises:
[0006] The sleeve comprises a main body and a forming head, the main body comprises an inner taper groove and a mounting groove, the forming head is detachably mounted in the mounting groove, and the forming head is provided with a forming through hole in the depth direction of the mounting groove;
[0007] The core comprises an outer taper surface and a core hole arranged in the inside of the core, and the core is sequentially arranged through the core hole and the forming through hole;
[0008] At least part of the outer taper surface extends into the inner taper groove, and the outer taper surface and the inner taper groove form a material passing channel.
[0009] In an embodiment, the shape of the forming head and the mounting groove is cylindrical, the outer peripheral surface of the forming head is provided with a first thread, the inner wall surface of the mounting groove is provided with a second thread, and the first thread and the second thread are arranged in cooperation.
[0010] In an embodiment, the forming through hole comprises a first discharge hole, a second discharge hole and an intermediate hole, and the first discharge hole and the second discharge hole are communicated through the intermediate hole.
[0011] The number of the through core holes is two, and the first discharge hole and the second discharge hole are respectively arranged corresponding to one of the through core holes, and the central axes of the through core holes, the first discharge hole, the second discharge hole and the intermediate hole are arranged in parallel.
[0012] In an embodiment, the forming head comprises a radial plane, and the forming head and the material passing channel are symmetrically arranged along the radial plane, and the first discharge hole and the second discharge hole are symmetrically arranged along the radial plane.
[0013] In an embodiment, at least two auxiliary grooves are arranged on the side of the forming head away from the inner taper groove, so as to facilitate the movement of the forming head through the auxiliary grooves.
[0014] In an embodiment, it is defined that the taper angle of the outer taper surface is a, and the taper angle of the inner taper groove is b.
[0015] Then, the a and the b satisfy: (b-a) ∈ [10°, 20°].
[0016] In an embodiment, a guide cavity in communication with the through core hole is arranged on the side of the mold core away from the forming head, and the cross-sectional area of the guide cavity gradually increases in the direction gradually away from the forming head.
[0017] In an embodiment, the guide cavity is in the shape of a circular truncated cone.
[0018] The utility model further provides a kind of extrusion equipment, including the cable extrusion die of any one of above-mentioned embodiments, and the extrusion equipment further includes bed and feeding device, and the cable extrusion die and the feeding device are installed in the bed, and the feeding device is used to transport insulating material to the material passing channel.
[0019] In an embodiment, the extrusion equipment is used to coat the insulating material on the surface of the wire core, and the extrusion equipment further includes cooling tank, and the cooling tank is installed on the side of the forming head away from the mold core, and the cooling tank is used to cool the insulating material on the surface of the wire core.
[0020] According to the technical scheme provided by the utility model, the cable extrusion die is used for the insulation layer extrusion process of the cable, and the cable is internally provided with a wire core. The cable extrusion die comprises a die sleeve and a die core, the die sleeve comprises a main body and a forming head, the main body comprises an inner taper groove and a mounting groove, the forming head is detachably mounted in the mounting groove, and the forming head is provided with a forming through hole in the depth direction of the mounting groove; the die core comprises an outer taper surface and a core passing hole arranged in the die core, at least part of the outer taper surface extends into the inner taper groove, a material passing channel is formed between the outer taper surface and the inner taper groove, and the material passing channel is in communication with the forming through hole. Through the arrangement, when different specifications of cables need to be produced, the forming head can be only detached and replaced with another type to achieve the production, the opening areas of the forming through holes of different types of forming heads are different, so that different specifications of cables can be produced, the outer contours of different types of forming heads are all matched with the mounting groove, the versatility of the main body is improved, one main body is matched with the production of cables of multiple specifications, the design cost of the extrusion die is reduced, and the comprehensive cost during the cable production is further reduced. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative labor.
[0022] Figure 1 The cross-sectional structure schematic view of one embodiment of the cable extrusion die provided by the utility model is shown in the figure.
[0023] Figure 2 The cross-sectional structure schematic view of one embodiment of the cable extrusion die provided by the utility model is shown in the figure. Figure 1 The exploded structure schematic view of the die sleeve in the cable extrusion die provided by the utility model is shown in the figure.
[0024] Figure 3 The cross-sectional structure schematic view of one embodiment of the cable extrusion die provided by the utility model is shown in the figure. Figure 1 The cross-sectional structure schematic view of one embodiment of the cable extrusion die provided by the utility model is shown in the figure.
[0025] Figure 4 The cross-sectional structure schematic view of one embodiment of the cable extrusion die provided by the utility model is shown in the figure. Figure 1 The plane structure schematic view of the forming head in the cable extrusion die provided by the utility model is shown in the figure.
[0026] EXPLANATION OF DRAWINGS:
[0027] 1000, cable extrusion die;
[0028] 1, die sleeve; 11, main body; 111, inner taper groove; 112, mounting groove; 12, forming head; 121, forming through hole; 1211, first discharge hole; 1212, second discharge hole; 1213, intermediate hole; 122, auxiliary groove;
[0029] 2, mold core; 21, outer taper surface; 22, through core hole; 23, guide cavity;
[0030] 3, material passing channel;
[0031] 4, mold axis.
[0032] The purposes, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0034] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.
[0035] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one feature. In addition, if "and / or" or "and / or" appears in the entire text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0036] In the production process of cables, after the core production is completed, in order to ensure the safety and performance of the cable, a layer of insulation layer needs to be evenly coated on the surface of the core. The setting of the insulation layer is realized through the insulation layer extrusion process. The core device of the insulation layer extrusion process is a cable extrusion die. The core continuously passes through the cable extrusion die, so that the surface of the core is coated with a layer of insulation layer. In actual operation, extrusion type or semi-extrusion type die is widely used. They can extrude and coat the molten insulation material on the surface of the core according to different production needs, form a dense and uniform insulation layer, and ensure that the cable can meet the design requirements in electrical performance and mechanical performance.
[0037] However, according to the statistical research of the applicant, it is found that cable manufacturers often face the situation that a batch of products contains cables of multiple specifications (including but not limited to national standards, non-standard and European standards). A cable extrusion die can usually only produce one specification of cable, which means that if a cable manufacturer needs to produce cables of multiple specifications, multiple types of extrusion dies must be designed and prepared. This not only increases the design and manufacturing cost of the die, but also reduces the production efficiency and increases the complexity of production management due to frequent die replacement during production. In addition, the storage and management of multiple dies also require additional space and resources, further increasing the comprehensive cost of cable processing and production.
[0038] In view of this, the utility model provides a cable extrusion die to solve or at least alleviate the above problems.
[0039] Please refer to Figures 1 to 3 In an embodiment of the utility model, the cable extrusion die 1000 is used for coating a layer of insulation layer on the outer periphery of the core of the cable, which comprises a die sleeve 1 and a die core 2. The die sleeve 1 comprises a main body 11 and a forming head 12. The main body 11 comprises an inner taper groove 111 and a mounting groove 112. The forming head 12 is detachably mounted on the mounting groove 112. The forming head 12 is provided with a forming through hole 121 along the depth direction of the mounting groove 112. The die core 2 comprises an outer taper surface 21 and a core passing hole 22 arranged inside the die core 2. The core passes through the core passing hole 22 and the forming through hole 121 in sequence. At least part of the outer taper surface 21 extends into the inner taper groove 111. The outer taper surface 21 and the inner taper groove 111 form a material passing channel 3. The material passing channel 3 is in communication with the forming through hole 121.
[0040] According to the scheme provided by the embodiment, when the cable is subjected to the insulating layer extrusion process, the core of the cable moves in the direction of the forming through hole 121 from the core passing hole 22, when the core passes into the forming through hole 121 from the core passing hole 22, the insulating material in the molten state flows into the forming through hole 121 through the material passing channel 3 and coats the surface of the core, and after the core moves to the side of the forming through hole 121 away from the core passing hole 22, an insulating layer is formed on the surface of the core, and at this time, the extrusion of the insulating layer is completed. The thickness of the insulating layer is determined by the difference between the radius of the core and the radius of the forming through hole 121, and according to different cable specifications, the radius of the core and the thickness of the insulating layer are different.
[0041] The technical scheme of the embodiment adopts the detachable forming head 12, so that the model of the forming head 12 can be adjusted according to different cable production specifications. Through this setting, when different specifications of cables need to be produced, the forming head 12 only needs to be detached and replaced with another model, the opening areas of the forming through holes 121 of different models of the forming head 12 are different, so as to adapt to the production of different specifications of cables, and the outer contours of different models of the forming head 12 are all adapted to the mounting groove 112, which improves the versatility of the main body 11, so that one main body 11 is adapted to the production of multiple specifications of cables, thereby reducing the design cost, manufacturing cost and mold management cost of the extrusion mold, and further reducing the comprehensive cost during cable production.
[0042] Further, referring to Figure 2 and Figure 4 In an embodiment of the utility model, the shape of the forming head 12 and the mounting groove 112 are both cylindrical, the outer periphery of the forming head 12 is provided with the first screw thread, the inner wall of the mounting groove 112 is provided with the second screw thread, and the first screw thread and the second screw thread are matched. Through this setting, the forming head 12 can be removed only by rotating it counterclockwise to make the first screw thread and the second screw thread disengage. The outer periphery of the forming head 12 of different specifications is all provided with the first screw thread matched with the second screw thread, and when another specification of the forming head 12 needs to be installed, the first screw thread and the second screw thread can be matched by rotating the forming head 12 clockwise, so that the installation of another specification of the forming head 12 is completed.
[0043] Further, referring to Figure 3 and Figure 4In an embodiment of the present application, the forming through hole 121 includes a first discharge hole 1211, a second discharge hole 1212 and an intermediate hole 1213, the first discharge hole 1211 and the second discharge hole 1212 are communicated through the intermediate hole 1213; the number of the core passing holes 22 is two, the first discharge hole 1211 and the second discharge hole 1212 are respectively arranged corresponding to one of the core passing holes 22, and the central axes of the core passing holes 22, the first discharge hole 1211, the second discharge hole 1212 and the intermediate hole 1213 are all arranged in parallel. Through this arrangement, the cable extrusion die 1000 can produce double-core cables, and in production, each wire core corresponds to one core passing hole 22, and the two wire cores move synchronously to the direction of the forming through hole 121, one of the wire cores passes into the first discharge hole 1211, and the other wire core passes into the second discharge hole 1212. At this time, the insulation material in a molten state flows into the forming through hole 121 through the material passing channel 3, and there are three flow directions, a part of the insulation material flows into the first discharge hole 1211 to coat one of the wire cores, another part of the insulation material flows into the second discharge hole 1212 to coat the other wire core, and the last part of the insulation material flows into the intermediate hole 1213 to form an insulation part between the two wire cores, so as to avoid the contact between the two wire cores or reduce the electrical interference generated between the two wire cores. In this way, the double-core cable is formed at one time, the production efficiency of the double-core cable is improved, and the insulation effect between the two wire cores can be guaranteed.
[0044] Please continue to refer to Figure 4 In an embodiment of the present application, the forming head 12 includes a radial plane, and the forming head 12 and the material passing channel 3 are both symmetrically arranged along the radial plane, and the first discharge hole 1211 and the second discharge hole 1212 are symmetrically arranged along the radial plane. Among them, since the shape of the forming head 12 is cylindrical, it has a radial plane, which passes through the central axis of the forming head 12 and is perpendicular to the side surface of the forming head 12, so the radial plane can divide the forming head 12 into two parts that are mirror images of each other. Through this arrangement, on the one hand, the insulation layer forming effect of the double-core cable can be guaranteed; on the other hand, this arrangement is conducive to the uniform flow of the insulation material into the first discharge hole 1211 and the second discharge hole 1212, avoiding the case that the volume difference of the insulation material flowing into the two discharge holes is too large.
[0045] In an embodiment of the present application, at least two auxiliary grooves 122 are arranged on the side of the forming head 12 away from the inner taper groove 111, so as to move the forming head 12 through the auxiliary grooves 122. Please refer to Figure 4 The auxiliary grooves 122 provide an additional point of leverage for the operator, making it easier and more stable to rotate or move the forming head 12. This design can reduce the difficulty of the operator in loading and unloading the forming head 12, and improve the work efficiency. It also allows the operator to safely grasp the forming head 12, avoiding accidental injury caused by slipping or instability.
[0046] Referring to Figure 1 In an embodiment of the present application, the taper angle of the outer taper surface 21 is a, and the taper angle of the inner taper groove 111 is b; a and b satisfy: (b-a)∈[10°, 20°]. Through this setting, the outer taper surface 21 and the inner taper groove 111 form the material passing channel 3. When (b-a)<10°, the material passing channel 3 is narrow, which is not conducive to the flow of the insulating material. At this time, the coating speed of the insulating layer is too slow, which affects the production efficiency of the cable. When (b-a)>20°, the material passing channel 3 is wide, and at this time, the flow speed of the insulating material in the material passing channel 3 is fast. If the moving speed of the core does not match the flow speed of the insulating material, the insulating material is easy to accumulate in the material passing channel 3 or flow out along the gap between the mold sleeve 1 and the mold core 2 due to excessive pressure, which causes waste of the insulating material. If the moving speed of the core is increased to match the flow speed of the insulating material, the moving speed of the core will be too fast. Since the insulating material has viscosity, the insulating material is difficult to uniformly coat on the surface of the core when the moving speed of the core is too fast, thereby affecting the uniformity of the thickness of the insulating layer. By limiting the taper angle difference (b-a) of the outer taper surface 21 and the inner taper groove 111 within the range of [10°, 20°], the uniformity of the insulating layer and the production efficiency can be ensured while ensuring smooth flow of the insulating material.
[0047] Referring to Figure 3 In an embodiment of the present application, the side of the mold core 2 away from the forming head 12 is provided with a guide cavity 23 communicating with the core passing hole 22. In the direction gradually away from the forming head 12, the cross-sectional area of the guide cavity 23 gradually increases. The gradually increasing guide cavity 23 can better guide the cable core into the core passing hole 22, avoiding the core from being offset or twisted when entering the mold core 2. This stable guiding effect can ensure that the cable maintains linear motion during the production process and reduces the occurrence of core offset.
[0048] Further, in an embodiment of the present application, the shape of the guide cavity 23 is a circular truncated cone. The circular truncated cone-shaped guide cavity 23 has a relatively smooth inner wall, and the inner wall of the circular truncated cone-shaped guide cavity 23 is gradually expanded, which can more stably guide the core from the guide cavity 23 into the core passing hole 22. In this embodiment, the cable extrusion die 1000 as a whole has a die axis 4, which is the central axis of the cable extrusion die 1000. The die axis 4 coincides with the axis of the circular truncated cone-shaped guide cavity 23. Similarly, the material passing channel 3 is arranged along the circumference of the outer taper surface 21 of the mold core 2, and the axis thereof and the central axis of the forming head 12 all coincide with the die axis 4. This setting is convenient for the manufacture of the cable extrusion die 1000 as a whole, and is also conducive to ensuring that the insulating material in the material passing channel 3 uniformly flows into the forming through hole 121.
[0049] The utility model also proposes a kind of extrusion equipment, the extrusion equipment includes cable extrusion mould 1000, the specific structure of the cable extrusion mould 1000 refers to above-mentioned embodiment, since the extrusion equipment of the application adopts all technical solutions of above-mentioned all embodiments, at least has all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer one by one elaboration. Among them, extrusion equipment also includes frame and feeding device, cable extrusion mould 1000 and feeding device are installed to frame, and feeding device is used to deliver insulating material to pass material channel 3. Frame can provide stable support for feeding device and cable extrusion mould 1000, and feeding device can ensure the continuity and stability of insulating material supply, avoid production stagnation caused by insulating material interruption.
[0050] In addition, in an embodiment of the utility model, the extrusion equipment is used for coating insulating material on the surface of online core, and the extrusion equipment further includes a cooling tank, the cooling tank is installed on the side of the forming head 12 away from the mold core 2, and the cooling tank is used for cooling the insulating material on the surface of the core. Cooling liquid or air cooling equipment can be arranged in the cooling tank to ensure that the insulating material is uniformly cooled rapidly after extrusion, and to avoid inconsistent thickness of the insulating layer or surface defects caused by long cooling time of the insulating material. On the other hand, the setting of the cooling tank can significantly shorten the time from high temperature to cooling and solidification of the insulating material, thereby speeding up the production.
[0051] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings contents, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.
Claims
1. A cable extrusion die for use in an insulation layer extrusion process of a cable, the cable comprising a core, characterized in that, The cable extrusion die comprises a die sleeve and a die core. The die sleeve comprises a main body and a forming head. The main body comprises an inner taper groove and a mounting groove. The forming head is detachably mounted in the mounting groove.
2. The cable extrusion die of claim 1, wherein, The forming head is provided with a first thread on its outer circumferential surface. The mounting groove is provided with a second thread on its inner wall surface.
3. The cable extrusion die of claim 2, wherein, The first thread and the second thread are arranged in cooperation. The forming head is turned counterclockwise to disengage the first thread and the second thread. The forming head is provided with at least two auxiliary grooves on the side away from the inner taper groove.
5. The cable extrusion die of claim 1, wherein, The die core comprises an outer taper surface and a core passing hole arranged inside the die core.
6. The cable extrusion die of claim 5, wherein, The wire core passes through the core passing hole and the forming hole in sequence.
7. An extrusion apparatus characterized by, At least part of the outer taper surface extends into the inner taper groove.
8. The extrusion apparatus of claim 7, wherein The outer taper surface and the inner taper groove form a material passing channel. The forming hole comprises a first discharge hole, a second discharge hole and an intermediate hole. The first discharge hole and the second discharge hole are arranged in correspondence with one of the core passing holes. The core passing hole, the first discharge hole, the second discharge hole and the intermediate hole are arranged in parallel. The forming head comprises a radial plane. The forming head and the material passing channel are symmetrically arranged along the radial plane. The first discharge hole and the second discharge hole are symmetrically arranged along the radial plane.
4. The cable extrusion die according to claim 1, wherein the taper angle of the outer taper surface is a, and the taper angle of the inner taper groove is b. The a and the b satisfy (b-a)∈[10°,20°]. The die core is provided with a guide cavity communicating with the core passing hole on the side away from the forming head. The cross-sectional area of the guide cavity gradually increases in the direction gradually away from the forming head. The guide cavity is in the shape of a circular truncated cone. The extrusion device further comprises a machine base and a feeding device. The cable extrusion die and the feeding device are mounted on the machine base. The feeding device is used to deliver insulation material to the material passing channel. The extrusion device is used to coat the insulation material on the surface of the wire core. The extrusion device further comprises a cooling tank. The cooling tank is mounted on the side of the forming head away from the die core. The cooling tank is used to cool the insulation material on the surface of the wire core.