Device for extruding double-row lead PTFE insulated wire

Abstract

The utility model provides a device for extruding a double-row lead PTFE (Polytetrafluoroethylene) insulated wire, which comprises an inner die body, an outer die body and an outer die body, the double-row conductor guide pipe group is arranged in the inner mold body in a penetrating manner and comprises a first guide pipe and a second guide pipe which are arranged in parallel; the connection control structure is used for controlling the distance between the two conductors, is arranged on the outer side of the conductor outlet, and comprises a connection area which is positioned on one side far away from the outer mold body and enables the first guide pipe to be connected with the second guide pipe through a connection medium; the non-connection area is located on the side close to the outer mold body, and the first guide pipe and the second guide pipe are kept in a non-connection state in the non-connection area; therefore, high-speed stable extrusion of double-row wires can be realized, parallel distance can be accurately and dynamically controlled, meanwhile, an insulating material is prevented from reversely invading the die device, the production cost is reduced, the production effect is improved, and the large-scale production requirement of high-performance PTFE insulated wires is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to extrusion electric wire technical field, concretely relates to a device of extruding double-row conductor PTFE insulated electric wire. BACKGROUND

[0002] Polytetrafluoroethylene (PTFE) insulated electric wire is widely used in aerospace, electronic communication and other high-precision fields due to its excellent high-temperature resistance, corrosion resistance and electrical properties. At present, most of the signal lines used in domestic communication industry are single-row conductor PTFE insulated electric wires. The performance of this electric wire in high-speed communication is not as good as that of double-row conductor PTFE insulated electric wire. In order to improve the development of communication technology, it is urgent to develop double-row conductor PTFE insulated electric wire. In the extrusion molding process of double-row conductor, the parallel arrangement accuracy of the conductor, the uniformity of the insulation layer and the production speed are the core factors that determine the quality of the product. However, the design of the existing double-row conductor extrusion device still has significant bottlenecks, which restricts the stability and yield rate under high-speed production.

[0003] In the traditional mold structure, the spacing control of double-row conductors usually relies on fixed guide tube groups, and the guide tubes are connected with the outer mold in a rigid manner or formed integrally. This design has the following defects when extruding at high speed: first, the conductors lack dynamic adjustment ability after passing through the guide tubes, especially in the outlet area of the mold, due to the difference in material flow pressure or conductor tension fluctuation, which easily leads to the deviation of the spacing between the two conductors (misalignment of the distance), and even causes twisting; second, the fixed connection structure forms a mechanical constraint near the outer mold, which may cause the insulation material (such as molten PTFE) to flow backward into the gap between the guide tubes under high pressure, resulting in blockage of the core rod or uneven thickness of the insulation layer; in addition, if a completely separated guide tube design is used at the outlet of the conductor, although it can avoid backward flow of the material, it is difficult to ensure the parallelism of the double-row conductors, and it needs to rely on subsequent correction processes, increasing the process complexity.

[0004] The disclosure of the above background art content is only used to assist in understanding the utility model concept and technical solutions of the utility model, which does not necessarily belong to the prior art of the present patent application, nor does it necessarily provide technical guidance; in the absence of clear evidence that the above content has been disclosed before the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. UTILITY MODEL CONTENT

[0005] To address the technical challenges of achieving high-speed, stable extrusion of double-row conductors, precise dynamic control of spacing, and preventing the reverse intrusion of insulating material into the die, this invention proposes a device for extruding double-row PTFE insulated wires. This device enables high-speed, stable extrusion of double-row conductors, precise dynamic control of spacing, and prevents the reverse intrusion of insulating material into the die, thereby reducing production costs and improving production efficiency to meet the large-scale production needs of high-performance PTFE insulated wires.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] On the one hand, this utility model provides a device for extruding double-row PTFE insulated wires, including: an inner mold body, which has a conductor inlet and a conductor outlet at its two axial ends respectively;

[0008] A double-row conductor guide tube assembly is inserted into the inner mold body and includes a first guide tube and a second guide tube arranged in parallel.

[0009] A connection control structure, used to control the spacing between two conductors, is located outside the conductor outlet and includes:

[0010] The connecting area is located on the side away from the outer mold body, and the first guide tube and the second guide tube are connected by a connecting medium;

[0011] The non-connection area is located on the side close to the outer mold body, where the first guide tube and the second guide tube remain in a non-connected state.

[0012] This invention proposes a device for extruding double-row PTFE insulated wires, which can achieve high-speed and stable extrusion of double-row wires, precise dynamic control of the spacing, and a mold device that avoids reverse intrusion of insulating material, thereby reducing production costs and improving production efficiency to meet the needs of large-scale production of high-performance PTFE insulated wires.

[0013] As a preferred technical solution, it includes: an annular threaded component, wherein the annular threaded component is provided with a first snap-fit ​​component, and the conductor inlet of the inner mold body is provided with a second snap-fit ​​component, wherein the first snap-fit ​​component and the second snap-fit ​​component snap-fit ​​together so that the annular threaded component snaps together with the inner mold body.

[0014] As a preferred technical solution, it includes: a core rod, wherein the internal thread of the core rod and the external thread of the annular threaded component cooperate with each other so that the core rod is connected to the inner mold body through the annular threaded component.

[0015] As a preferred technical solution, it includes: a cylinder, a machine head is provided on one end of the cylinder, and a clamp is provided on the outside of the cylinder and the machine head, the clamp holding the cylinder and the machine head together.

[0016] As a preferred technical solution, the machine head is through the inside of the cylinder barrel, and the machine head makes the inside diameter of the cylinder barrel to the machine head gradually reduced in size.

[0017] As a preferred technical solution, one end of the outer mold body is inserted into the inside of the machine head, and the other end of the outer mold body is arranged outside the machine head.

[0018] As a preferred technical solution, the core rod is arranged in the cylinder barrel, and the inner mold body and the double-row conductor guide pipe group are arranged in the machine head.

[0019] As a preferred technical solution, the other end of the cylinder barrel is provided with a push rod, and the cylinder barrel is provided with a PTFE blank, and the push rod is used to push the PTFE blank to run towards the machine head.

[0020] As a preferred technical solution, the inner mold body is conical.

[0021] As a preferred technical solution, the inside of the machine head is conical.

[0022] The device for extruding double-row conductor PTFE insulated wire provided by the utility model has the following beneficial effects:

[0023] 1) The device for extruding double-row conductor PTFE insulated wire provided by the utility model can realize high-speed stable extrusion of double-row conductors, precise dynamic control and distance, avoid reverse invasion of insulating materials into the mold device, reduce production cost, improve production effect, and meet the large-scale production demand of high-performance PTFE insulated wire.

[0024] 2) The utility model provides a kind of extrusion double-row conductor PTFE insulated wire's device, split type connection control structure is set in the outside of conductor export, including connection area and non-connection area, connection area: the spacing between two guide tubes is fixed by connecting medium (such as adhesive, adhesive preferably glue), ensure the parallelism of conductor, avoid the knot of conductor;Non-connection area: the guide tube close to outer die body keeps independent, allow conductor to produce slight deformation due to material flow when extruding under high pressure, adaptive adjustment row distance deviation;Compared with traditional fixed guide tube, this structure does not need to stop adjusting, can dynamically compensate conductor tension fluctuation, realize high-speed stable extrusion;In the area close to outer die, two guide tubes keep non-connected state, avoid forming closed gap, to block molten PTFE material reverse infiltration inside core rod under high pressure;Compared with traditional integrated guide tube, this scheme reduces the contact area of material and mould, reduces friction resistance and reverse pressure;The axial through design of conductor import and export, ensure that PTFE material can evenly cover conductor;Through the adaptability of connection control structure, traditional external adjustment step is saved, realize continuous high-speed production, non-connection area reduces material stagnation risk, reduces the probability of mould blockage. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the utility model provides a kind of extrusion double-row conductor PTFE insulated wire's device;

[0026] Figure 2 It is a part structure schematic view (annular screw part and inner die body are separated) of the utility model provides a kind of extrusion double-row conductor PTFE insulated wire's device;

[0027] Figure 3 It is Figure 2 Right view of structure;

[0028] Figure 4 It is a part structure schematic view (annular screw part, inner die body and outer die body) of the utility model provides a kind of extrusion double-row conductor PTFE insulated wire's device;

[0029] Wherein, 1-inner die body;2-conductor import;3-conductor export;4-double-row conductor guide tube group;5-first guide tube;6-second guide tube;7-connecting medium;8-annular screw part;9-first clamping piece;10-second clamping piece;11-outer die body;12-core rod;13-cylinder;14-machine head;15-PTFE blank;16-clamp;17-conductor. DETAILED DESCRIPTION

[0030] The preferred embodiment of the utility model is described in detail below in conjunction with the drawings.

[0031] For example, Figures 1-4As shown, the utility model provides a kind of extrusion double-row conductor PTFE insulated wire's device, comprising: inner mould body 1, its axial both ends are equipped with conductor inlet 2 and conductor outlet 3 respectively;

[0032] Double-row conductor guide tube group 4, wear in the inner mould body 1, include parallelly arranged first guide tube 5 and second guide tube 6;

[0033] Connecting control structure, for controlling the distance of two conductors, be set on the outside of the conductor outlet 3, include:

[0034] Connecting area, located away from the side of outer mould body 11, first guide tube 5 and second guide tube 6 are connected by connecting medium 7;

[0035] Non-connecting area, located close to the side of outer mould body 11, first guide tube 5 and second guide tube 6 keep non-connected state in this area.

[0036] The utility model provides a kind of extrusion double-row conductor PTFE insulated wire's device, can realize double-row conductor high-speed stable extrusion, precision dynamic control distance, simultaneously avoid the die device of reverse invasion of insulating material, reduce production cost, improve production effect, to meet the large-scale production demand of high-performance PTFE insulated wire.

[0037] Preferably, as Figure 2 And Figure 4 As shown, including: annular threaded part 8, first clamping piece 9 is equipped on the annular threaded part 8, second clamping piece 10 is equipped on the conductor inlet 2 of the inner mould body 1, first clamping piece 9 and second clamping piece 10 are clamped to make annular threaded part 8 with inner mould body 1 clamping, realize the connection of annular threaded part 8 and inner mould body 1, without rotating inner mould body 1 when connecting, further avoid the knot of conductor, clamping structure does not need to rely on spin-in torque, and the sealing property is more stable and the dismounting efficiency is higher.

[0038] Preferably, as Figure 1 As shown, including: core rod 12, the internal thread of core rod 12 and the external thread of annular threaded part 8 are mutually matched to make core rod 12 connect with inner mould body 1 by annular threaded part 8;Thread cooperation realizes the axial connection of core rod 12 and inner mould body 1, ensure that core rod 12 does not have radial deviation when high-speed extrusion, maintain the coaxial degree of conductor and double-row conductor guide tube group 4.

[0039] Preferably, as Figure 1As shown, it comprises: a cylinder 13, one end of which is provided with a head 14, and the outer side of the cylinder 13 and the head 14 is provided with a clamp 16, which clamps the connection between the cylinder 13 and the head 14, and the clamp 16 realizes the connection between the cylinder 13 and the head 14 through mechanical clamping force, ensuring the coaxiality and interface sealing of the two, compared with traditional welding or threaded connection, the clamp 16 can dynamically compensate the processing tolerance, avoiding the sealing failure caused by the deformation of the cylinder 13 and / or the head 14.

[0040] Preferably, as Figure 1 As shown, the head 14 is through the inside of the cylinder 13, and the head 14 makes the inside diameter of the cylinder 13 to the head 14 gradually reduced; the inside diameter of the head 14 gradually reduces from the outlet of the cylinder 13 to the outlet of the head 14, forming a tapered compression chamber, when the push rod (not shown) pushes the PTFE blank 15, it produces a gradually increasing pressure gradient, so that the molecular chain of PTFE material is arranged in a directional manner, eliminating internal pores and improving density; compared with the traditional straight cylinder structure, the tapered design can improve the material compression efficiency and avoid the blank cracking caused by uneven pressure distribution.

[0041] Preferably, as Figure 1 As shown, one end of the outer mold body 11 is inserted into the inside of the head 14, and the other end of the outer mold body 11 is provided outside the head 14; the one end of the outer mold body 11 inserted into the inside of the head 14 is axially positioned through precise fitting, ensuring the concentricity of the outer mold body 11, the head 14 and the core rod 12, avoiding uneven thickness of the insulation layer or surface corrugation caused by core deviation during extrusion; the part exposed outside the head 14 is adapted to different specifications of mold sleeves through adjustable structure (such as thread or buckle), meeting the extrusion needs of multi-wire diameter cables.

[0042] Preferably, as Figure 1 As shown, the core rod 12 is arranged in the cylinder 13, and the inner mold body 1 and the double-row conductor guide pipe group 4 are arranged in the head 14; the double-row guide pipe group 4 is arranged in the head 14, which respectively guides two groups of conductors to enter the extrusion area in parallel, avoiding the insulation layer overlapping defects caused by multi-conductor twisting or crossing.

[0043] Preferably, as Figure 1 As shown, the other end of the cylinder 13 is provided with a push rod (not shown) inside, the cylinder 13 is provided with a PTFE blank 15, and the push rod (not shown) is used to push the PTFE blank 15 to run towards the head 14, and the continuous advancement of the push rod (not shown) forces the PTFE blank 15 to pass through the narrow channel of the head 14, realizing continuous extrusion.

[0044] Preferably, as Figures 1-2 and Figure 4As shown, the inner mold body 1 is conical, which can reduce the resistance of PTFE blank advancement, avoid the breakage of wire insulation layer or surface wave defects caused by sudden change of shear rate, compared with cylindrical inner mold.

[0045] Preferably, as Figure 1 As shown, the interior of the machine head 14 is conical, which can improve the material compression efficiency compared with the traditional straight cylinder structure, and avoid the blank cracking caused by uneven pressure distribution.

[0046] When the conductor is only one (strand), rotating the inner mold body will not cause the conductor to twist, and the conductor can normally pass through the inner and outer molds to produce qualified products. However, when the conductor has two (strands), rotating the inner mold will cause the two conductors to twist, and the conductor cannot normally pass through the mold, which cannot be produced. Figures 1-4 As shown, the present application first takes the double-row conductor guide pipe group 4 into the inner mold body 1, the connection area of the two conductor guide pipes is located away from the outer mold body 11, and the first guide pipe 5 and the second guide pipe 6 are connected through the connecting medium 7; the non-connection area of the two conductor guide pipes is located close to the outer mold body 11, and the first guide pipe 5 and the second guide pipe 6 remain in a non-connected state in this area.

[0047] First, lock the annular threaded part 8 to the core rod 12, pass the two conductors through the first guide pipe 5 and the second guide pipe 6 respectively, and then insert the second clamping part 10 of the inner mold body 1 into the first clamping part 9 of the annular threaded part 8. According to the orientation of the first guide pipe 5 and the second guide pipe 6 of the inner mold body 1, adjust the direction of the outlet of the outer mold body 11 to be consistent with the locking clamping, so that the double-row conductor PTFE insulated wire can be normally produced. This can realize high-speed and stable extrusion of double-row conductors, precise dynamic control and distance, while avoiding the reverse invasion of the insulation material into the mold device, reducing the production cost and improving the production effect, so as to meet the large-scale production demand of high-performance PTFE insulated wire.

[0048] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all the embodiments falling within the scope of the claims of the application belong to the scope of protection of the utility model.

Claims

1. An apparatus for extruding double-row PTFE insulated wires, characterized in that, include: The inner mold body has a conductor inlet and a conductor outlet at its two axial ends, respectively. A double-row conductor guide tube assembly is inserted into the inner mold body and includes a first guide tube and a second guide tube arranged in parallel. A connection control structure, used to control the spacing between two conductors, is located outside the conductor outlet and includes: The connecting area is located on the side away from the outer mold body, and the first guide tube and the second guide tube are connected by a connecting medium; The non-connection area is located on the side close to the outer mold body, where the first guide tube and the second guide tube remain in a non-connected state.

2. The apparatus for extruding double-row PTFE insulated wires according to claim 1, characterized in that, include: A ring-shaped threaded component is provided with a first snap-fit ​​component, and a second snap-fit ​​component is provided on the conductor inlet of the inner mold body. The first snap-fit ​​component and the second snap-fit ​​component snap-fit ​​together so that the ring-shaped threaded component snaps into the inner mold body.

3. The apparatus for extruding double-row PTFE insulated wires according to claim 2, characterized in that, include: The core rod has an internal thread that engages with the external thread of the annular threaded component to connect the core rod to the inner mold body via the annular threaded component.

4. The apparatus for extruding double-row PTFE insulated wires according to claim 3, characterized in that, include: A cylinder is provided with a machine head at one end. A clamp is provided on the outside of the cylinder and the machine head, and the clamp holds the cylinder and the machine head together.

5. The apparatus for extruding double-row PTFE insulated wires according to claim 4, characterized in that, The machine head is internally connected to the cylinder, and the machine head causes the inner diameter of the cylinder to gradually decrease from the inner diameter of the machine head to the inner diameter of the machine head.

6. The apparatus for extruding double-row PTFE insulated wires according to claim 4, characterized in that, One end of the outer mold body is inserted into the machine head, and the other end of the outer mold body is located on the outside of the machine head.

7. The apparatus for extruding double-row PTFE insulated wires according to claim 4, characterized in that, The core rod is disposed inside the cylinder, and the inner mold body and the double-row conductor guide tube assembly are both disposed inside the machine head.

8. The apparatus for extruding double-row PTFE insulated wires according to claim 4, characterized in that, A push rod is provided at the other end of the cylinder, and PTFE blank is provided inside the cylinder. The push rod is used to push the PTFE blank towards the head of the machine.

9. The apparatus for extruding double-row PTFE insulated wires according to claim 1, characterized in that, The inner mold body is conical in shape.

10. The apparatus for extruding double-row PTFE insulated wires according to claim 4, characterized in that, The inside of the machine head is conical.

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