Trifluoro plastic thread making device

Abstract

The three-fluoroplastic-wire manufacturing device comprises an extrusion-tube fluoroplastic extruder, three front-and-rear longitudinal threading cylinders arranged in parallel in the circumferential direction are arranged at the extrusion-tube die of the extruder, and a tubular extrusion channel is arranged outside each threading cylinder; a driving mechanism is arranged, a wire guiding mechanism is arranged in front of the extruder, and a cooling mechanism is arranged in front of the wire guiding mechanism. Three wire cores are threaded out of the three threading cylinders to form three fluoroplastic wires, the wire guiding mechanism guides the three fluoroplastic wires to approach each other and be horizontally gathered together at the center of the three fluoroplastic wires to form three fluoroplastic wires, three-wire adhesion is realized by using the fluoroplastic insulation layer on the surface of the fluoroplastic wire which has not been completely cooled, and manual adhesion is not needed, thereby simplifying the manufacturing process. Since each fluoroplastic wire can approach the other two fluoroplastic wires, the three fluoroplastic wires jointly bear the displacement amount, the displacement amount distributed to each fluoroplastic wire is small, and the problem of concentricity reduction caused by excessive displacement of the fluoroplastic wire is less likely to occur.

Description

Technical Field

[0001] This invention relates to the field of three-parallel wire manufacturing equipment, specifically to a three-parallel fluoroplastic wire manufacturing equipment. Background Technology

[0002] Cables are generally manufactured using extrusion machines. The wire core passes forward through the extrusion die, where the extruder heats the plastic to a molten state. The molten plastic is then extruded forward from the die, coating the outside of the wire core to form a plastic insulation layer. The wire core with the plastic insulation layer then enters a cooling mechanism to cool and solidify, forming the finished product. Fluoroplastic cables have a fluoroplastic insulation layer on the outside of the wire core. During manufacturing, the fluoroplastic is also first heated to a molten state and then coated onto the outside of the wire core. However, because fluoroplastic has a high viscosity in the molten state, to minimize melt cracking, a tube-type extrusion machine with a tube-type die is generally used for production. The tube-type die has a threading tube with a tubular extrusion channel on its outside. The molten fluoroplastic is extruded forward from the tubular extrusion channel, forming a cone-shaped melt in front of the threading tube. The wire core passes through the threading spool from back to front, pulling the conical molten body. The conical molten body gradually thins as the wire core extends forward, forming a uniform fluoroplastic insulation layer that covers the outside of the wire core. The wire core and the fluoroplastic insulation layer together form the fluoroplastic wire. Because existing tubular extruders can only coat a single wire core at a time, producing a three-ply fluoroplastic wire requires first fabricating three separate fluoroplastic wires, then manually joining them horizontally and gluing them together, making the process quite cumbersome. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a three-parallel fluoroplastic wire manufacturing device to simplify the manufacturing process.

[0004] The inventors initially attempted to directly replace the threading spools at the extrusion die with three horizontally parallel spools, and to install a conductor mechanism between the extruder and the cooling mechanism. Three wire cores would emerge from the three threading spools to form three horizontally parallel fluoroplastic wires. The conductor mechanism would guide the two horizontally parallel fluoroplastic wires towards the central fluoroplastic wire, utilizing the still-slightly cooled fluoroplastic insulation layer to achieve three-wire bonding, eliminating the need for manual bonding and simplifying the manufacturing process. However, practical experience revealed that the relative position between the wire cores and the fluoroplastic insulation layer was unstable when the insulation layer was not fully cooled. As the two horizontally parallel fluoroplastic wires moved towards the central fluoroplastic wire, the greater the lateral displacement, the easier it was for relative displacement to occur between the wire cores and the fluoroplastic insulation layer, leading to a decrease in the concentricity of the fluoroplastic wires.

[0005] The inventors realized that if some of the displacement of the two lateral fluoroplastic wires could be distributed to the central fluoroplastic wire, thereby reducing the lateral displacement of the two lateral fluoroplastic wires, the possibility of relative displacement between the wire core and the insulation layer could be reduced. However, if the three fluoroplastic wires were kept laterally parallel, the central fluoroplastic wire could only move towards one side, failing to accommodate both lateral sides. The inventors then conceived of changing the three fluoroplastic wires from lateral to circumferential parallel arrangement, and moving them towards each other at their center. This way, each fluoroplastic wire could move towards the other two. With the three fluoroplastic wires sharing the displacement, the displacement distributed to each fluoroplastic wire was smaller, effectively improving the problem of decreased concentricity caused by excessive fluoroplastic wire displacement. Based on this, the inventors designed the three-parallel fluoroplastic wire manufacturing apparatus of this invention.

[0006] To solve the above-mentioned technical problems, the present invention provides a three-parallel fluoroplastic wire manufacturing apparatus, including a tube-type fluoroplastic extruder. The extruder has three longitudinally arranged threading cylinders arranged in a circumferential direction at the extrusion die. Each threading cylinder has a tubular extrusion channel on its outer side. The extruder extrudes molten fluoroplastic from the tubular extrusion channel forward, thereby forming a conical melt on the front side of the threading cylinder. The apparatus includes a driving mechanism that drives three wire cores to pass through the three threading cylinders from back to front. The wire cores pull and drive the corresponding conical melt to extend forward, forming a fluoroplastic insulation layer that covers the outside of the wire cores and together with the wire cores to form a fluoroplastic wire. A conductor mechanism is provided in front of the extruder to guide the three fluoroplastic wires to approach each other towards the center of the three fluoroplastic wires until they are laterally joined together to form a three-parallel fluoroplastic wire. A cooling mechanism is provided in front of the conductor mechanism to cool the three-parallel fluoroplastic wire.

[0007] Furthermore, among the three spools, the radial spacing between any two spools is the same.

[0008] Furthermore, among the three reels, the first reel and the second reel are placed side by side horizontally.

[0009] Furthermore, the third spool is located on the vertical side of the first and second spools, and the conductor mechanism specifically guides the fluoroplastic wire formed by the wire core passing through the third spool to move vertically between the other two fluoroplastic wires until it is laterally joined together with the other two fluoroplastic wires.

[0010] Furthermore, a winding section is provided in front of the cooling mechanism for winding and storing the cooled three-ply fluoroplastic wires. The driving mechanism specifically drives the winding section to rotate, thereby driving the cores of the three fluoroplastic wires to move forward.

[0011] Furthermore, the conductor mechanism includes three sets of guide wheels arranged horizontally side by side. Each set of guide wheels has multiple wheels arranged in a front-to-back manner. The rear wheels of the three sets of guide wheels are respectively aligned with three threading cylinders to support three fluoroplastic wires. The front wheels of the three sets of guide wheels move closer to each other towards their center to guide the three fluoroplastic wires to move closer to each other towards their center. The front wheels of the three sets of guide wheels are brought together horizontally to guide the three fluoroplastic wires to be brought together horizontally.

[0012] Furthermore, the front ends of the three sets of guide wheels are connected together so that they rotate synchronously.

[0013] Furthermore, the threading cylinder is a cylinder through which the round wire core passes, and the wheel body of the three sets of guide wheels is provided with a semi-circular support position for the lower half of the cylindrical fluoroplastic wire to rest and support. The semi-circular support positions of each pair of adjacent wheels at the front end of the three sets of guide wheels are intersected laterally.

[0014] Furthermore, the rear part of the conductor mechanism is the same length as the front part.

[0015] Furthermore, the cooling mechanism includes a water tank, and the drive mechanism drives the three parallel fluoroplastic lines forward to be immersed in the water tank for cooling.

[0016] The present invention relates to a three-ply fluoroplastic wire manufacturing apparatus. Three wire cores emerge from three threading cylinders to form three circumferentially parallel fluoroplastic wires. A conductor mechanism guides the three fluoroplastic wires towards each other at their center until they are laterally joined together to form a three-ply fluoroplastic wire. The three wires are bonded using the still-slightly cooled fluoroplastic insulation layer on the surface of the wires, eliminating the need for manual bonding and simplifying the manufacturing process. Because each fluoroplastic wire can move closer to the other two, the three wires share the displacement, resulting in a smaller displacement per wire and reducing the likelihood of concentricity loss due to excessive displacement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a three-parallel fluoroplastic wire manufacturing device.

[0018] Figure 2 This is a magnified view of a portion of the extrusion die; the wire core in the picture does not pass through the threading spool.

[0019] Figure 3 This is a magnified view of a portion of the extrusion die, showing that the wire core has already passed through the threading drum.

[0020] Figure 4 yes Figure 1 A magnified view of a portion of the image, showing a larger area. Figure 1 Part A.

[0021] Figure 5 yes Figure 4 KK sectional view.

[0022] Figure 6 yes Figure 1 A magnified view of a portion of the image, showing a larger area. Figure 1 At part B, the center extension line of the threading spool is schematically drawn with a dashed line in the figure.

[0023] Figure 7 yes Figure 6 The EE sectional view shows the threading spool and its center extension line schematically drawn with dashed lines.

[0024] Figure 8 yes Figure 1 A magnified view of a portion of the image, showing a larger area. Figure 1 At point C, the center extension line of the threading spool is schematically drawn with a dashed line in the diagram.

[0025] Figure 9 yes Figure 8 The FF sectional view shows the threading spool, the center extension line of the threading spool, the center of the three threading spools, and the center of the three fluoroplastic wires, all schematically drawn with dashed lines.

[0026] Figure 10 yes Figure 9 A magnified view of a portion of the image, showing a larger area. Figure 9 At part G, the diagram uses dashed lines to schematically depict the center extension line of the threading spool and the semi-circular support position of the wheel.

[0027] Figure 11 It is a schematic diagram of the cooling mechanism, drive motor and winding frame. Detailed Implementation

[0028] The equipment for manufacturing three-ply fluoroplastic wire is shown below. Figure 1 The extrusion machine includes, from back to front, a tube-type fluoroplastic extruder 1, a wire guiding mechanism 2, a cooling mechanism 3, and a drive motor 4. A winding frame 5 is mounted on the motor shaft of the drive motor 4 (not shown in the figure due to perspective), serving as the winding section. The wire guiding mechanism 2 is 36cm long. The extruder 1 body 11 is prior art, and its tube-type die 12 is described in [reference needed]. Figure 2 The extruder 1 has three longitudinally arranged threading cylinders 13 arranged circumferentially, each cylinder having an inner diameter of 1.05~1.1mm. The radial spacing between any two threading cylinders 13 is the same. The first threading cylinder 131 and the second threading cylinder 132 are arranged laterally side-by-side, and the third threading cylinder 133 is located above the first and second threading cylinders 131 and 132. A 1mm wide cylindrical extrusion channel 14 is provided on the outer side of each threading cylinder 13. The extruder body 11 contains fluoroplastic granules (not shown in the figure).

[0029] See Figure 1 and Figure 3The operator manually pulls three 1mm diameter circular wire cores 6, allowing the ends of the three wire cores 6 to pass through the three threading cylinders 13 from back to front, and then continue forward through the conductor mechanism 2 and the cooling mechanism 3, before winding onto the winding frame 5. The operator activates the extruder 1, whose body 11 heats the fluoroplastic granules into molten fluoroplastic, which is then extruded forward from the three tubular extrusion channels 14 of the extrusion die 12, forming three conical molten bodies 71 in front of the three threading cylinders 13. Figure 4 and Figure 5 As shown. The operator starts the drive motor 4 to drive the winding frame 5 to rotate. The drive motor 4, as the drive mechanism, indirectly drives the three wire cores 6 to move synchronously from back to front at a speed of 72 m / min via the winding frame 5. Taking the first wire core 61 as an example: the part of the first wire core 61 located behind the extrusion die 12 passes through the first threading cylinder 131 from back to front, pulling the conical melt 71. Under the drive of the first wire core 61, the conical melt 71 gradually thins as the first wire core 61 extends forward, forming a fluoroplastic insulation layer 72 with a thickness of about 0.5 mm, which covers the outside of the first wire core 61. The first wire core 61 and the fluoroplastic insulation layer 72 covering it together form the first fluoroplastic wire 81. Similarly, the second wire core 62 passes through the second conduit 132 from back to front, forming the second fluoroplastic wire 82 together with the fluoroplastic insulation layer 72 covering its outer side. The third wire core 63 passes through the third conduit 133 from back to front, forming the third fluoroplastic wire 83 together with the fluoroplastic insulation layer 72 covering its outer side. Details are omitted here. Since the three conduits 13 are circumferentially parallel, the three fluoroplastic wires 81, 82, and 83 formed by the three wire cores 6 passing through the three conduits 13 are also circumferentially parallel. Driven by the winding frame 5, the three fluoroplastic wires 81, 82, and 83 continue to pass forward through the conductor mechanism 2, as shown in the diagram. Figure 6 and Figure 8 The conductor mechanism 2 guides the three fluoroplastic wires 81, 82, and 83 towards each other at their center until they are laterally joined together. The fluoroplastic insulation layer 72, which is not yet fully cooled on the surface of the three fluoroplastic wires 81, 82, and 83, bonds them together into a three-ply fluoroplastic wire 84. This eliminates the need for manual bonding, thus simplifying the manufacturing process. See [link / description]. Figure 11 Driven by the winding frame 5, the three-ply fluoroplastic wire 84 continues to pass forward through the cooling mechanism 3. The cooling mechanism 3 cools the three-ply fluoroplastic wire 84, and the cooled three-ply fluoroplastic wire 84 moves forward to the winding frame 5 for winding and storage. Since each fluoroplastic wire can move closer to the other two fluoroplastic wires, the three fluoroplastic wires 81, 82, and 83 share the displacement, and the displacement distributed to each fluoroplastic wire is small, so it is not easy to have a problem of decreased concentricity due to excessive displacement of the fluoroplastic wires.

[0030] See Figure 8The conductor mechanism 2 includes three sets of guide wheels 21, 22, and 23 arranged horizontally side by side. These three sets of guide wheels 21, 22, and 23 guide three fluoroplastic wires 81, 82, and 83 respectively. The first set of guide wheels 21 will be described in detail as an example. (See...) Figure 6 and Figure 7 The first set of guide wheels 21 consists of seven wheel bodies 210 arranged side-by-side. Each wheel body 210 is equipped with a support frame 219 and a pair of side baffles 218. Each wheel body 210 has a semi-circular support position 29 with a diameter of 2mm. The lower half 811 of the first fluoroplastic wire 81 rests against and is supported on the semi-circular support positions 29 of the seven wheel bodies 210. Counting from back to front, the first, second, and third wheel bodies 211, 212, and 213 serve as the rear wheel bodies 26 of the first set of guide wheels 21, respectively aligned with the first threading drum 131, providing stable support for the first fluoroplastic wire 81. The distance between the first wheel body 211 and the third wheel body 213 is 120mm. The fourth wheel body 214 serves as the middle wheel body of the first set of guide wheels 21, also aligned with the first threading drum 131, providing support for the first fluoroplastic wire 81. See Figure 8 and Figure 9 The fifth, sixth, and seventh wheel bodies 215, 216, and 217 serve as the front wheel bodies 25 of the first group of guide wheels 21, with the seventh wheel body 217 serving as the front wheel body 24 of the first group of guide wheels 21. The distance between the fifth wheel body 215 and the seventh wheel body 217 is 120mm. Among the three front wheel bodies 25 of the first group of guide wheels 21, the frontmost front wheel body 25 is closer to the center extension line L of the three threading spools 13. The front wheel bodies 25 of the first group of guide wheels 21 collectively guide the first fluoroplastic wire 81 close to the center extension line L of the three threading spools 13. The second and third sets of guide wheels 22 and 23 work similarly to the first set of guide wheels 21, and will not be described in detail. Specifically, the front wheel body 25 of the second set of guide wheels 22 guides the second fluoroplastic wire 82 towards the center extension line L of the three threading drums 13. The front wheel body 25 of the third set of guide wheels 23 guides the third fluoroplastic wire 83 vertically downwards towards the center extension line L of the three threading drums 13. Since the three fluoroplastic wires 81, 82, and 83 pass through the three threading drums 13 from back to front, their centers 80 correspond to the centers 130 of the three threading drums 13. The front wheel bodies 25 of the three sets of guide wheels 21, 22, and 23 jointly guide the three fluoroplastic wires 81, 82, and 83 towards the center extension line L of the three threading drums 13, that is, guiding the three fluoroplastic wires 81, 82, and 83 towards each other at their centers 80. See... Figure 9 and Figure 10The front wheel bodies 24 of the three sets of guide wheels 21, 22, and 23 are laterally joined together and share the same pair of side baffles 218. The distance H between each pair of adjacent front wheel bodies 24 is 1.8~1.9mm. Therefore, the semi-circular support positions 29 of each pair of adjacent front wheel bodies 24 are laterally staggered. Thus, the front wheel bodies 24 of the three sets of guide wheels 21, 22, and 23 jointly guide the three fluoroplastic lines 81, 82, and 83 to be laterally joined together.

[0031] See Figure 11 The cooling mechanism 3 includes a water tank 31 and a cooling guide wheel 32 mounted on the water tank 31. The three-ply fluoroplastic wire 84 is guided forward by the cooling guide wheel 32 and immersed in the water tank 31 for cooling. In other embodiments, a fan can be used as the cooling mechanism. The three-ply fluoroplastic wire 84 passes under the fan, and the fan blows air from top to bottom to cool the three-ply fluoroplastic wire 84.

[0032] In other embodiments, the front wheel bodies 24 of the three sets of guide wheels 21, 22, and 23 are fixedly connected together so that they rotate synchronously.

[0033] In other embodiments, the length of the conductor mechanism 2 can be changed to 30cm~60cm, and the forward movement speed of the conductor 6 can be changed to 60~80m / min.

[0034] In a non-preferred embodiment, the radial distance between the first threading spool 131 and the second threading spool 132 can be increased or decreased, making it greater than or less than the radial distance between the first threading spool 131 and the second threading spool 132, and the radial distance between the first threading spool 131 and the third threading spool 133.

[0035] In a non-preferred embodiment, the first threading spool 131 may be arranged diagonally alongside the second threading spool 132 instead of laterally.

Claims

1. A device for manufacturing three-ply fluoroplastic wires, characterized in that: The extruder includes a tube-type fluoroplastic extruder with three circumferentially parallel longitudinal threading cylinders at the extrusion die. Each threading cylinder has a tubular extrusion channel on its outer side. The extruder extrudes molten fluoroplastic from the tubular extrusion channel forward, forming a conical melt in front of the threading cylinder. The extruder also includes a drive mechanism that drives three wire cores to pass through the three threading cylinders from back to front. The wire cores pull the corresponding conical melt forward to form a fluoroplastic insulation layer covering the outside of the wire cores and together forming a fluoroplastic wire. A conductor mechanism is located in front of the extruder to guide the three fluoroplastic wires toward each other towards the center of the three fluoroplastic wires until they are laterally joined together to form a three-parallel fluoroplastic wire. A cooling mechanism is located in front of the conductor mechanism to cool the three-parallel fluoroplastic wire.

2. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 1, characterized in that: Of the three spools, the radial spacing between any two spools is the same.

3. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 1 or 2, characterized in that: Of the three reels, the first and second reels are placed side by side horizontally.

4. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 3, characterized in that: The third spool is located on the vertical side of the first and second spools. The conductor mechanism specifically guides the fluoroplastic wire formed by the wire core passing through the third spool to move vertically between the other two fluoroplastic wires until it is laterally joined together with the other two fluoroplastic wires.

5. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 1, characterized in that: A winding section is provided in front of the cooling mechanism for winding and storing the cooled three-ply fluoroplastic wires. The driving mechanism specifically drives the winding section to rotate, thereby driving the cores of the three fluoroplastic wires to move forward.

6. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 1, characterized in that: The conductor mechanism includes three sets of guide wheels arranged horizontally side by side. Each set of guide wheels has multiple wheels arranged in a front-to-back manner. The rear wheels of the three sets of guide wheels are respectively aligned with three threading cylinders to support three fluoroplastic wires. The front wheels of the three sets of guide wheels move closer to each other towards their center to guide the three fluoroplastic wires to move closer to each other towards their center. The front wheels of the three sets of guide wheels are then brought together horizontally to guide the three fluoroplastic wires to be brought together horizontally.

7. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 6, characterized in that: The front wheels of the three sets of guide wheels are connected together so that they rotate synchronously.

8. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 6, characterized in that: The threading spool is a cylinder through which a round wire core passes. The three sets of guide wheels have semi-circular support positions for the lower half of the cylindrical fluoroplastic wire to rest and support. The semi-circular support positions of every two adjacent wheels at the front end of the three sets of guide wheels are intersected laterally.

9. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 6, characterized in that: The rear and front parts of the conductor mechanism are of equal length.

10. The apparatus for manufacturing three-ply fluoroplastic wires according to claim 1, characterized in that: The cooling mechanism includes a water tank, and the drive mechanism drives the three parallel fluoroplastic lines to be immersed forward into the water tank for cooling.

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