Plastic extrusion device for cable molding

Abstract

The present application relates to a plastic extrusion device for cable molding, belonging to the technical field of extruders, comprising a mounting platform, a plastic extruder longitudinally arranged on the top surface of the mounting platform, a plastic plasticizing mechanism transversely arranged on the top surface of the mounting platform and connected to the barrel of the plastic extruder, the plastic plasticizing mechanism comprising a plasticizing cylinder supported on the top surface of the mounting platform by a supporting mechanism, a pushing assembly connected to the plasticizing cylinder for pushing the material in the plasticizing cylinder toward the connecting cylinder, and a raw material feeding assembly and an additive feeding assembly detachably connected to the top surface of the plasticizing cylinder, the interior of the plasticizing cylinder being formed with a flow channel connected to the barrel of the plastic extruder, the flow channel being divided into a feeding section located below the raw material feeding assembly, a melting section located between the raw material feeding assembly and the additive feeding assembly, and a homogenizing section located below the additive feeding assembly. The present application has the effect of being able to fully melt and homogenize a variety of raw materials.

Description

Technical Field

[0001] The present application relates to the technical field of extruders, and in particular to a plastic extrusion device for cable molding. Background Art

[0002] During the current cable production process, copper wire needs to be extruded, that is, an inner sheath is wrapped on the surface of the copper wire to protect the wire core. The inner sheath isolates the copper wire or other metal wire from the outside world to achieve an insulation effect.

[0003] The existing Chinese patent with announcement number CN217395635U discloses an environmentally friendly cable molding extruder, including an extrusion tube, an extrusion nozzle, a fixing frame, a steering wheel, a base, a cleaning mechanism and multiple extrusion mechanisms. The multiple extrusion mechanisms are arranged on the base, and the multiple extruders are connected to the extrusion tube. Each group of the extrusion mechanisms includes an extrusion barrel, a connecting pipe, a motor, a reducer, an extrusion threaded rod and a feeding hopper. The two ends of the connecting pipe are respectively connected to the extrusion barrel and the extrusion tube. The motor is installed at the input end of the reducer, and the reducer is installed at the other end of the extrusion barrel. The extrusion threaded rod is located in the extrusion barrel, and one end of the extrusion threaded rod passes through the extrusion barrel and is connected to the output end of the reducer. The feeding hopper is connected to the extrusion barrel, and a heating module is provided on the outer wall of the extrusion barrel. The raw materials for the protective layer required are added to multiple groups of extrusion barrels through multiple groups of feeding hoppers, and the corresponding motors are powered on and started. The power output by the motors is decelerated by the reducer to rotate the extrusion threaded rod, and the material is melted under the heating action of the heating module and discharged into the extrusion tube through the connecting pipe.

[0004] Regarding the above-mentioned related technologies, the inventors believe that there are the following defects: the raw materials of multiple protective layers are heat-melted through multiple groups of extrusion barrels respectively, and then discharged into the extrusion pipe through a connecting pipe, which is not conducive to sufficient melting and homogenization of the raw materials of multiple protective layers. Summary of the Invention

[0005] In order to fully melt and homogenize a variety of raw materials, the present application provides a plastic extrusion device for cable molding.

[0006] The present application provides a plastic extrusion device for cable molding that adopts the following technical solution:

[0007] A plastic extrusion device for cable molding comprises a mounting platform, a plastic extruder longitudinally arranged on the top surface of the mounting platform, and a plastic plasticizing mechanism transversely arranged on the top surface of the mounting platform and connected to the barrel of the plastic extruder. The plastic plasticizing mechanism comprises a plasticizing cylinder supported on the top surface of the mounting platform by a supporting mechanism, a pushing assembly connected to the plasticizing cylinder for pushing the material in the plasticizing cylinder toward the connecting cylinder, and a raw material feeding assembly and an additive feeding assembly detachably connected to the top surface of the plasticizing cylinder. A flow channel connected to the barrel of the plastic extruder is formed inside the plasticizing cylinder. The flow channel is divided into a feeding section located below the raw material feeding assembly, a melting section located between the raw material feeding assembly and the additive feeding assembly, and a homogenizing section located below the additive feeding assembly.

[0008] By adopting the above technical solution, the plastic raw material enters the feeding section of the flow channel through the discharge port of the raw material feeding component, and under the pushing action of the spiral pushing member, the plastic raw material is transported to the melting section in the plasticizing barrel for hot melting; the additive enters the homogenizing section of the flow channel through the discharge port of the additive feeding component, so that the additive and the molten plastic raw material are fully melted and homogenized, so that the material is in a completely uniform plasticized state, and under the pushing action of the pushing component, the plasticized material is transported to the barrel of the plastic extruder, and then extruded through the die head in the plastic extruder under the thrust of the screw of the plastic extruder. The plasticized material is evenly attached to the surface of the copper wire as a protective layer of the cable, thereby achieving the effect of fully melting and homogenizing a variety of raw materials.

[0009] Optionally, the raw material feeding assembly includes a feed hopper, a feed barrel, a stirring member arranged in the feed hopper, and a spiral feeding member arranged in the feed barrel, the opening at one end of the feed hopper with a smaller cross-sectional area is detachably connected to the top of the feed barrel via a flange, the end of the feed barrel away from the feed hopper is detachably connected to the top surface of the plasticizing barrel, the upper opening of the feed hopper is fixedly connected to a cover plate, the cover plate is fixedly penetrated by a vertically arranged feed pipe, a driving member and a reducer are installed on the top surface of the cover plate, the output end of the driving member is fixedly connected to the input end of the reducer, the output end of the reducer is fixedly connected to a stirring shaft, the stirring member is fixedly connected to the circumferential side of the stirring shaft, and the stirring member is located in the feed hopper, the spiral feeding member is fixedly connected to the circumferential side of the stirring shaft, and the spiral feeding member is located in the feed barrel.

[0010] By adopting the above technical solution, the stirring element is used to uniformly stir the material in the feed hopper, and the spiral feeding element is used to transport the uniformly stirred material from the feed barrel to the flow channel.

[0011] Optionally, each of the stirring members includes a stirring plate and a long connecting rod and a short connecting rod arranged in parallel up and down and fixedly connected to the circumference of the stirring shaft, the side of the stirring plate away from the stirring shaft is close to the inner wall of the feed hopper, the top of the stirring plate close to the stirring shaft is fixedly connected to the end of the long connecting rod away from the stirring shaft, the bottom of the stirring plate close to the stirring shaft is fixedly connected to the end of the short connecting rod away from the stirring shaft, and the spiral feeding member is a feeding spiral blade fixedly connected to the circumference of the stirring shaft.

[0012] By adopting the above technical solution, under the joint connection of the long connecting rod and the short connecting rod, the stirring plate is driven to rotate during the rotation of the stirring shaft, thereby uniformly stirring the material in the feed hopper.

[0013] Optionally, the pushing assembly includes a connecting box fixed on the top surface of the mounting table and located at one end of the plasticizing cylinder away from the connecting cylinder, a power piece installed on the side of the connecting box away from the plasticizing cylinder, a polygonal shaft fixedly connected to the output end of the power piece, and a plurality of spiral pushing pieces sequentially sleeved on the circumferential side of the polygonal shaft, the end of the polygonal shaft away from the power piece passes through the connecting box and extends into the plasticizing cylinder, the spiral blades on the spiral pushing pieces located on the feeding section and the homogenizing section are continuous spiral blades, and the spiral blades on the spiral pushing pieces located on the melting section are intermittent spiral blades, and the continuous spiral blades and the intermittent spiral blades are arranged in sequence.

[0014] By adopting the above technical solution, the power member drives the polygonal shaft to rotate, and the rotating polygonal shaft drives the spiral pusher to rotate, thereby transporting the material in the flow channel to the barrel of the plastic extruder.

[0015] Optionally, the inner wall of the plasticizing cylinder is provided with a detachably connected limiting plate between the melting section and the homogenizing section. The plasticizing cylinder includes two symmetrically arranged working cylinders that can be spliced ​​with each other. A plurality of lining rods are threadedly connected to both sides of the inner wall of each working cylinder. The plurality of lining rods located on the same inner wall of the same working cylinder are distributed at equal intervals along the same straight line, and each of the lining rods is located between adjacent spiral plates on the spiral pushing member.

[0016] By adopting the above technical solution, the plastic raw material will be in a molten state after being heated in the melting section, and the relative volume will be reduced. Under the limiting action of the limiting plate, the conveying speed of the molten plastic raw material is slowed down, thereby improving the hot melting effect of the plastic raw material in the melting section, and the setting of the lining rod makes the material more evenly mixed and homogenized.

[0017] Optionally, the plasticizing cylinder and the barrel of the plastic extruder are detachably connected via a connecting cylinder, and both ends of each working cylinder are fixedly connected with a connector, and the two connectors on the same end face of the plasticizing cylinder are spliced ​​together to form a flange plate, and a connecting flange is installed at one end of the connecting cylinder close to the plasticizing cylinder, and the connecting flange and flange plate that fit together are detachably connected via a clamp.

[0018] By adopting the above technical solution, the arrangement of the clamp realizes a detachable connection between the connecting cylinder and the plasticizing cylinder.

[0019] Optionally, two symmetrically arranged electric telescopic rods are hinged on the top surface of the mounting table, and the telescopic ends of the two electric telescopic rods are respectively hinged to the sides of the two working cylinders that are away from each other, and the supporting ends of the supporting mechanisms are respectively connected to the two working cylinders. The supporting mechanisms are provided in two groups, and the electric telescopic rod is located between the two groups of supporting mechanisms.

[0020] By adopting the above technical solution, with the two supporting mechanisms supporting the two working cylinders respectively, the two electric telescopic rods are used to open or close the two working cylinders, thereby facilitating the maintenance of the spiral pusher located in the plasticizing cylinder.

[0021] Optionally, each of the support mechanisms includes a vertical plate fixed on the top surface of the mounting table, a fixed shaft fixedly connected to the top of one side of the vertical plate, two connecting rings movably sleeved on the fixed shaft, and two support arms staggered and respectively fixedly connected to the circumferential sides of the two connecting rings, one end of the support arm away from the connecting ring is fixedly connected to the side of the working cylinder at the corresponding position, and the end of the fixed shaft away from the vertical plate is detachably connected to a blocking plate through a locking piece.

[0022] By adopting the above technical solution, when the two working cylinders are opened, the two supporting arms respectively support the two working cylinders.

[0023] Optionally, a limiting assembly for limiting the connecting ring is provided on the top surface of the mounting platform, and the limiting assembly includes a bracket fixed on the top surface of the mounting platform, a mounting shell fixedly connected to the top of the bracket, a linkage member provided in the mounting shell, a supporting frame connected to the top of the linkage member, and a clamping plate connected to the bottom end of the linkage member, and a bayonet corresponding to the position of the clamping plate is opened on the circumferential side of the connecting ring, and the cross-sectional area of ​​the bayonet is larger than the cross-sectional area of ​​the clamping plate.

[0024] By adopting the above technical solution, when the two working cylinders are opened, the two support arms drive the connecting ring to rotate, so that the position of the bayonet also moves accordingly. At the same time, the outer wall of the working cylinder abuts against the bearing end of the carrier, so that the downward-moving carrier drives the card plate to rotate through the linkage until the card plate is engaged in the bayonet, thereby limiting the connecting ring.

[0025] The top end of the lifting pin is connected with the bottom end of the support frame, and the support frame is fixed with a backing pin on the supporting rim of the movable frame, and the bottom end of the lifting pin is connected with the support frame of the fixed base.

[0026] By adopting the above technical solution, when the outer wall of the working cylinder abuts against the bearing end of the bearing frame, the bearing frame pushes the movable plate to move downward. During the downward movement of the movable plate, the reset part is in a compressed state, and the slider slides in the extension direction of the curved groove, so that the linkage shaft drives the clamping plate to rotate 90° and clamped in the bayonet, thereby limiting the rotation of the connecting ring.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] The plastic raw material enters the feeding section of the flow channel through the discharge port of the raw material feeding component. Under the pushing action of the spiral pushing piece, the plastic raw material is transported to the melting section in the plasticizing barrel for hot melting; the additive enters the homogenizing section of the flow channel through the discharge port of the additive feeding component, so that the additive and the molten plastic raw material are fully melted and homogenized, so that the material is in a completely uniform plasticized state. Under the pushing action of the pushing component, the plasticized material is transported to the barrel of the plastic extruder, and then extruded through the die head in the plastic extruder under the thrust of the screw of the plastic extruder. The plasticized material is evenly attached to the surface of the copper wire as a protective layer of the cable, achieving the effect of fully melting and homogenizing a variety of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of this application.

[0030] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A.

[0031] Figure 3 It is a schematic cross-sectional view of the plastic plasticizing mechanism of the present application.

[0032] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part B.

[0033] Figure 5 yes Figure 3 A partial enlarged schematic diagram of part C in the middle.

[0034] Figure 6 It is a structural schematic diagram of the spiral pusher of the present application.

[0035] Figure 7 It is a structural diagram of the support mechanism and limit assembly of this application.

[0036] Figure 8 yes Figure 7 A partial enlarged schematic diagram of part D in the middle.

[0037] Explanation of the reference numerals: 1. mounting platform; 11. plastic extruder; 12. connecting cylinder; 121. connecting flange; 13. electric telescopic rod; 2. plastic plasticizing mechanism; 21. plasticizing cylinder; 211. connector; 212. positioning groove; 213. fastener; 214. feeding section; 215. melting section; 216. homogenizing section; 217. limiting plate; 218. first exhaust pipe; 219. second exhaust pipe; 22. pushing assembly; 221. connecting box; 222. power part; 223. polygonal shaft; 224. spiral pushing part; 225. fixing part; 226. sealing plate; 23. raw material feeding assembly; 231. feeding hopper; 2311. cover plate; 2312. driving part; 2313. reducer; 2314. stirring shaft; 232. feeding cylinder; 2321. fixing Flange; 233, stirring piece; 2331, stirring plate; 2332, long connecting rod; 2333, short connecting rod; 234, spiral feeding piece; 24, additive feeding assembly; 25, clamping hoop; 251, arc hoop plate; 252, edging; 253, connecting piece; 254, notch; 255, threaded rod; 256, nut; 26, lining rod; 3, support mechanism; 31, vertical plate; 32, locking piece; 321, blocking plate; 33, connecting ring; 331, bayonet; 34, support arm; 4, limit assembly; 41, bracket; 42, mounting shell; 43, linkage piece; 431, fixed plate; 432, vertical rod; 433, reset piece; 434, movable plate; 4341, slider; 435, linkage shaft; 4351, curved groove; 44, carrier frame; 45, clamping plate. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 This application is described in further detail.

[0039] The embodiment of the present application discloses a plastic extrusion device for cable molding. Figure 1 and Figure 2The plastic extrusion device for cable molding includes a mounting platform 1, a plastic extruder 11 longitudinally arranged on the top surface of the mounting platform 1, and a plastic plasticizing mechanism 2 transversely arranged on the top surface of the mounting platform 1 and connected to the barrel of the plastic extruder 11; the plastic plasticizing mechanism 2 and the barrel of the plastic extruder 11 are detachably connected through a connecting cylinder 12; thereby, the plastic plasticizing mechanism 2 fully melts and homogenizes the plastic raw materials and additives, so that the materials are in a completely uniform plasticized state, and then the plasticized material flows into the barrel of the plastic extruder 11 through the connecting cylinder 12, and is extruded and formed through the die head in the plastic extruder 11 under the thrust of the screw of the plastic extruder 11, and the plasticized material is evenly adhered to the surface of the copper wire as a protective layer of the cable.

[0040] Reference Figure 1 and Figure 3 , a supporting mechanism 3 is installed on the top surface of the mounting table 1 and is located below the plastic plasticizing mechanism 2. The plastic plasticizing mechanism 2 includes a plasticizing cylinder 21 connected to the supporting end of the supporting mechanism 3, a pushing assembly 22 connected to the plasticizing cylinder 21 for pushing the material in the plasticizing cylinder 21 toward the connecting cylinder 12, and a raw material feeding assembly 23 and an additive feeding assembly 24 that are detachably connected to the top surface of the plasticizing cylinder 21 and are sequentially arranged along the material conveying direction.

[0041] Reference Figure 2 and Figure 3 The cross-section of the plasticizing cylinder 21 is square on the outside and circular on the inside. The length of the plasticizing cylinder 21 is perpendicular to the length of the barrel of the plastic extruder 11. A flow channel is formed inside the plasticizing cylinder 21, which communicates with the connecting cylinder 12. The plasticizing cylinder 21 includes two symmetrically arranged working cylinders, which are spliced ​​together to form the plasticizing cylinder 21. A semicircular connector 211 is fixedly connected to each end of each working cylinder. The two connectors 211 on the same end face of the plasticizing cylinder 21 are spliced ​​together to form a flange. The two connectors 211 on the same end face of the plasticizing cylinder 21 are detachably connected by a clamp 25.

[0042] Reference Figure 2 and Figure 4The hoop 25 includes two mutually hinged arc-shaped hoop plates 251, and both sides of each arc-shaped hoop plate 251 are integrally formed with a radially extending edging 252; the ends of the two arc-shaped plates away from the hinge are fixedly connected to a connecting piece 253, and the two connecting pieces 253 are provided with corresponding notches 254. When the two connecting pieces 253 are fitted together, the two notches 254 are connected; a threaded rod 255 is hinged on the notch 254 of one of the connecting pieces 253, and a nut 256 is threaded on the threaded rod 255; a connecting flange 121 is installed on the end of the connecting cylinder 12 close to the plasticizing cylinder 21. When the two working cylinders are joined together to form the plasticizing cylinder 21, the two connectors 211 on the same end face of the plasticizing cylinder 21 are joined together to form a flange, and the end faces of the connecting flange 121 and the flange that are close to each other fit together. Thus, the two arc-shaped hoop plates 251 are buckled onto the fitting connecting flange 121 and the flange, and the two edgings 252 respectively wrap around the edges of the flange and the connecting flange 121 that are away from each other. The threaded connection between the threaded rod 255 and the nut 256 allows the clamping hoop 25 to clamp the fitting connecting flange 121 and the flange together. The flange of the plasticizing cylinder 21 that is away from the connecting cylinder 12 is clamped by another clamping hoop 25.

[0043] Reference Figure 2 and Figure 5 The raw material feed assembly 23 and the additive feed assembly 24 have the same structure, so in this embodiment, the raw material feed assembly 23 is used as an example for explanation. The raw material feed assembly 23 includes a feed hopper 231, a feed barrel 232, a stirring element 233 disposed within the feed hopper 231, and a screw feed element 234 disposed within the feed barrel 232. The opening at the smaller end of the feed hopper 231 is detachably connected to the top of the feed barrel 232 via a flange. The end of the feed barrel 232, away from the feed hopper 231, is fixedly connected to a fixing flange 2321. A positioning groove 212 corresponding to the position of the fixing flange 2321 is defined on the top surface of the plasticizing barrel 21. The fixing flange 2321 and the positioning groove 212 match, and the fixing flange 2321 is detachably connected to the positioning groove 212 via a fastener 213. In this embodiment, the fastener 213 is a bolt.

[0044] Reference Figure 2 and Figure 5, a cover plate 2311 is fixedly connected to the upper opening of the feed hopper 231, and a vertically arranged feed pipe is fixedly penetrated into the cover plate 2311; a driving member 2312 and a reducer 2313 are installed on the top surface of the cover plate 2311; the output end of the driving member 2312 is fixedly connected to the input end of the reducer 2313, and the output end of the reducer 2313 is fixedly connected to the stirring shaft 2314; the stirring shaft 2314, the feed hopper 231 and the feed barrel 232 are coaxially arranged, the stirring member 233 is fixedly connected to the circumference of the stirring shaft 2314, and the stirring member 233 is located in the feed hopper 231; there are two groups of stirring members 233, and the two groups of stirring members 233 are staggered up and down on the circumference of the stirring shaft 2314; the spiral feeding member 234 is fixedly connected to the circumference of the stirring shaft 2314, and the spiral feeding member 234 is located in the feed barrel 232.

[0045] Reference Figure 2 and Figure 5 Each stirring member 233 includes a stirring plate 2331, and a long connecting rod 2332 and a short connecting rod 2333 arranged in parallel and fixedly connected to the circumference of the stirring shaft 2314. The side of the stirring plate 2331 away from the stirring shaft 2314 is close to the inner wall of the feed hopper 231. The top of the stirring plate 2331 on the side close to the stirring shaft 2314 is fixedly connected to the end of the long connecting rod 2332 away from the stirring shaft 2314. The bottom of the stirring plate 2331 on the side close to the stirring shaft 2314 is fixedly connected to the end of the short connecting rod 2333 away from the stirring shaft 2314. The spiral feeding member 234 is a feeding spiral blade, which is fixedly connected to the circumference of the stirring shaft 2314.

[0046] Thus, the driving member 2312 is started, and the output shaft of the driving member 2312 drives the stirring shaft 2314 to rotate through the reducer 2313. The rotating stirring shaft 2314 drives the stirring plate 2331 and the feeding spiral blade to rotate, thereby fully stirring the material in the feeding barrel 232 and then feeding it into the flow channel through the spiral.

[0047] Reference Figure 1 and Figure 5 The pushing assembly 22 includes a connecting box 221 fixed on the top surface of the mounting platform 1 and located at the end of the plasticizing cylinder 21 away from the connecting cylinder 12, a power piece 222 installed on the side of the connecting box 221 away from the plasticizing cylinder 21, a polygonal shaft 223 fixedly connected to the output end of the power piece 222, and a multi-section spiral pushing piece 224 sequentially sleeved on the circumference of the polygonal shaft 223; the end of the polygonal shaft 223 away from the power piece 222 passes through the connecting box 221 and extends into the plasticizing cylinder 21, and the polygonal shaft 223 and the plasticizing cylinder 21 are located on the same axis; a polygonal hole is opened on the spiral pushing piece 224 and passes through the two end surfaces of the spiral pushing piece 224; the polygonal hole of the spiral pushing piece 224 matches the polygonal shaft 223. In this embodiment, the polygonal shaft 223 is a hexagonal shaft.

[0048] Reference Figure 3 and Figure 5 The flow channel is divided into a feeding section 214, a melting section 215 and a homogenizing section 216, which are arranged in sequence along the material conveying direction; the feeding section 214 is located below the raw material feeding assembly 23, the melting section 215 is located between the raw material feeding assembly 23 and the additive feeding assembly 24, and the homogenizing section 216 is located below the additive feeding assembly 24; a heating plate (not shown in the figure) is installed in the plasticizing cylinder 21 and located at the melting section 215. The spiral blades on the spiral pusher 224 located on the feeding section 214 and the homogenizing section 216 are continuous spiral blades (see Figure 6 ), the spiral blades on the spiral pusher 224 located on the melting section 215 are discontinuous spiral blades (see Figure 6 ); continuous spiral blades and discontinuous spiral blades are arranged in sequence. A sealing plate 226 is detachably connected to the end of the polygonal shaft 223 away from the power part 222 through a fixing part 225. A limiting plate (not shown in the figure) is provided on the circumferential fixed sleeve of the connecting shaft. The sealing plate 226 is located at the end of the polygonal shaft 223 close to the connecting cylinder 12. The limiting plate is located in the plasticizing cylinder 21 and is located at the end of the polygonal shaft 223 close to the connecting box 221. Thus, under the joint clamping and limiting action of the limiting plate and the sealing plate 226, the multi-section spiral pusher 224 is limited between the limiting plate and the sealing plate 226. A plurality of lining rods 26 are threadedly connected to both sides of the inner wall of each working cylinder. The multiple lining rods 26 located on the same inner wall of the same working cylinder are distributed at equal intervals along the same straight line. Each lining rod 26 is located between adjacent spiral blades, so that the material is mixed and homogenized more evenly.

[0049] Thus, the plastic raw material enters the feeding section 214 of the flow channel through the discharge port of the raw material feeding assembly 23, and under the pushing action of the spiral pushing member 224, the plastic raw material is transported to the melting section 215 in the plasticizing cylinder 21 for hot melting; the additive enters the homogenizing section 216 of the flow channel through the discharge port of the additive feeding assembly 24, so that the additive and the molten plastic raw material are fully melted and homogenized, so that the material is in a completely uniform plasticized state.

[0050] In order to improve the thermal effect of the plastic raw material in the melting section 215, a limiting plate 217 is detachably connected to the inner wall of the plasticizing cylinder 21 and is located between the melting section 215 and the homogenizing section 216. The limiting plate 217 is formed by splicing two arc-shaped plates, and each arc-shaped plate is detachably connected to the inner wall of the working cylinder at the corresponding position; thus, after the plastic raw material is heated by the melting section 215, it will be in a molten state and its relative volume will be reduced. Under the limiting action of the limiting plate 217, the conveying speed of the molten plastic raw material is slowed down, thereby improving the hot melting effect of the plastic raw material in the melting section 215.

[0051] Reference Figure 3 and Figure 5 A first exhaust pipe 218 and a second exhaust pipe 219 are fixedly connected to the top surface of the plasticizing cylinder 21; the first exhaust pipe 218 is located between the limiting piece 217 and the discharge port of the additive feeding assembly 24, and the second exhaust pipe 219 is located on the side of the additive feeding assembly 24 away from the first exhaust pipe 218. This allows the exhaust of waste gas generated during the melting and homogenization of the plastic raw materials to be discharged, which helps maintain the pressure balance inside and outside the plasticizing cylinder 21.

[0052] Reference Figure 1 and Figure 2 Two symmetrically arranged electric telescopic rods 13 are hinged on the top surface of the mounting platform 1. The two electric telescopic rods 13 are located on both sides of the plasticizing cylinder 21; the telescopic ends of the two electric telescopic rods 13 are respectively hinged to the sides of the two working cylinders that are away from each other; so that when the clamp 25 is unlocked and the electric telescopic rod 13 is started, the telescopic ends of the electric telescopic rod 13 are retracted, thereby opening the two working cylinders.

[0053] Reference Figure 1 and Figure 7 The supporting ends of the support mechanism 3 are connected to the two working cylinders respectively; the support mechanism 3 is provided with two groups, and the electric telescopic rod 13 is located between the two groups of support mechanisms 3; each support mechanism 3 includes a vertical plate 31 fixed on the top surface of the mounting platform 1, a fixed shaft fixedly connected to the top of one side of the vertical plate 31, two connecting rings 33 movably sleeved on the fixed shaft, and two support arms 34 respectively fixedly connected to the sides of the two connecting rings 33; the length direction of the fixed shaft is consistent with the length direction of the plasticizing cylinder 21; the two support arms 34 are staggered, and the end of the support arm 34 away from the connecting ring 33 is fixedly connected to the side of the corresponding working cylinder. Therefore, when the two working cylinders are opened, the two support arms 34 play a supporting role for the two working cylinders respectively. In order to limit the connecting ring 33 on the fixed shaft, the end of the fixed shaft away from the vertical plate 31 is detachably connected to a blocking plate 321 through a locking member 32.

[0054] Reference Figure 7 and Figure 8 , mounting station 1 (see Figure 1 ) are provided on the top surface of the mounting platform 1 with four sets of position-limiting assemblies 4, each for limiting the position of four connecting rings 33; each position-limiting assembly 4 includes a bracket 41 fixed to the top surface of the mounting platform 1, a mounting shell 42 fixedly connected to the top end of the bracket 41, a linkage member 43 disposed in the mounting shell 42, a carrier 44 connected to the top end of the linkage member 43, and a clamping plate 45 connected to the bottom end of the linkage member 43;

[0055] Reference Figure 7 and Figure 8The linkage member 43 includes a fixed plate 431 fixedly connected to the bottom of the inner wall of the mounting shell 42, two vertical rods 432 respectively fixedly connected to the two ends of the top surface of the fixed plate 431, a reset member 433 sleeved on each vertical rod 432, a movable plate 434 slidably connected in the mounting shell 42 and located above the fixed plate 431, and a linkage shaft 435 vertically penetrating the movable plate 434 and the fixed plate 431; the top ends of the two vertical rods 432 vertically penetrate the movable plate 434 and are slidably connected to the movable plate 434; in this embodiment, the reset member 433 is a spring, and the spring is located between the movable plate 434 and the fixed plate 431. The bottom end of the carrier 44 extends into the mounting shell 42 and is fixedly connected to the top surface of the movable plate 434, and the bearing end of the carrier 44 abuts against the outer wall of the working cylinder; the linkage shaft 435 is located between the two vertical rods 432, and a curved groove 4351 is provided on the circumferential side of the linkage shaft 435, and the curved groove 4351 extends along the circumferential direction and axial direction of the linkage shaft 435, and the span of the curved groove 4351 along the circumferential direction of the linkage shaft 435 is 90°; the connection between the movable plate 434 and the linkage shaft 435 is fixedly connected with a slider 4341 that is slidingly connected to the curved groove 4351, and the linkage shaft 435 is rotatably connected to the fixed plate 431 through a bearing; the bottom end of the linkage shaft 435 vertically passes through the mounting shell 42 and extends to the outside of the mounting shell 42, and the bottom end of the linkage shaft 435 is fixedly connected to the clamping plate 45. A bayonet 331 corresponding to the position of the bayonet plate 45 is formed on the circumference of the connecting ring 33 , and the cross-sectional area of ​​the bayonet 331 is larger than the cross-sectional area of ​​the bayonet plate 45 .

[0056] Thus, when the two working cylinders are opened, the two supporting arms 34 drive the connecting ring 33 to rotate, causing the position of the bayonet 331 to move accordingly. At the same time, the outer wall of the working cylinder abuts against the bearing end of the carrier 44, causing the carrier 44 to push the movable plate 434 to move. During the downward movement of the movable plate 434, the reset member 433 is in a compressed state, and the slider 4341 slides in the extension direction of the curved groove 4351, causing the linkage shaft 435 to drive the clamping plate 45 to rotate 90°, and the end of the clamping plate 45 away from the linkage shaft 435 is engaged in the bayonet 331, thereby limiting the rotation of the connecting ring 33. The cross-sectional area of ​​the bayonet 331 is larger than that of the clamping plate 45. This is to provide space for the connecting ring 33 to rotate in advance when the two working cylinders need to be closed. Under the reset action of the reset member 433, the clamping plate 45 can slide smoothly out of the bayonet 331.

[0057] The implementation principle of a plastic extrusion device for cable molding in an embodiment of the present application is as follows: the plastic raw material enters the feeding section 214 of the flow channel through the discharge port of the raw material feeding component 23, and under the pushing action of the spiral pushing member 224, the plastic raw material is transported to the melting section 215 in the plasticizing barrel 21 for hot melting; the additive enters the homogenizing section 216 of the flow channel through the discharge port of the additive feeding component 24, so that the additive and the molten plastic raw material are fully melted and homogenized, so that the material is in a completely uniform plasticized state, and under the pushing action of the pushing component 22, the plasticized material is transported to the barrel of the plastic extruder 11, and then under the thrust of the screw of the plastic extruder 11, it is extruded and molded through the die head in the plastic extruder 11, and the plasticized material is evenly attached to the surface of the copper wire as a protective layer of the cable.

[0058] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A plastic extrusion device for cable molding, characterized in that: The invention comprises a mounting platform (1), a plastic extruder (11) longitudinally arranged on the top surface of the mounting platform (1), a plastic plasticizing mechanism (2) transversely arranged on the top surface of the mounting platform (1) and connected to the barrel of the plastic extruder (11), the plastic plasticizing mechanism (2) comprising a plasticizing cylinder (21) supported on the top surface of the mounting platform (1) by a supporting mechanism (3), a pushing assembly (22) connected to the plasticizing cylinder (21) for pushing the material in the plasticizing cylinder (21) toward the direction close to the connecting cylinder (12), and a supporting mechanism (3) for supporting the plasticizing cylinder (21). and a raw material feeding assembly (23) and an additive feeding assembly (24) detachably connected to the top surface of the plasticizing cylinder (21); a flow channel is formed inside the plasticizing cylinder (21) and is communicated with the barrel of the plastic extruder (11); the flow channel is divided into a feeding section (214) located below the raw material feeding assembly (23), a melting section (215) located between the raw material feeding assembly (23) and the additive feeding assembly (24), and a homogenizing section (216) located below the additive feeding assembly (24); The pushing assembly (22) comprises a connecting box (221) fixed on the top surface of the mounting platform (1) and located at one end of the plasticizing cylinder (21) away from the connecting cylinder (12), a power piece (222) installed on the side of the connecting box (221) away from the plasticizing cylinder (21), a polygonal shaft (223) fixedly connected to the output end of the power piece (222), and a plurality of spiral pushing pieces (224) sequentially sleeved on the circumference of the polygonal shaft (223), wherein the end of the polygonal shaft (223) away from the power piece (222) passes through the connecting box (221) and extends into the plasticizing cylinder (21), the spiral pieces on the spiral pushing piece (224) located on the feeding section (214) and the homogenizing section (216) are continuous spiral pieces, and the spiral pieces on the spiral pushing piece (224) located on the melting section (215) are discontinuous spiral pieces, and the continuous spiral pieces and the discontinuous spiral pieces are sequentially arranged; The inner side wall of the plasticizing cylinder (21) is detachably connected with a limiting plate (217) located between the melting section (215) and the homogenizing section (216), and the plasticizing cylinder (21) includes two symmetrically arranged working cylinders that can be spliced ​​with each other, and a plurality of lining rods (26) are threadedly connected to both sides of the inner wall of each working cylinder, and the plurality of lining rods (26) located on the same inner side wall of the same working cylinder are distributed at equal intervals along the same straight line, and each of the lining rods (26) is located between adjacent spiral plates on the spiral pushing member (224); Each of the supporting mechanisms (3) comprises a vertical plate (31) fixed on the top surface of the mounting platform (1), a fixed shaft fixedly connected to the top of one side of the vertical plate (31), two connecting rings (33) movably sleeved on the fixed shaft, and two supporting arms (34) staggered and respectively fixedly connected to the circumferences of the two connecting rings (33), one end of the supporting arm (34) away from the connecting ring (33) is fixedly connected to the side of the working cylinder at a corresponding position, and one end of the fixed shaft away from the vertical plate (31) is detachably connected to a blocking plate (321) via a locking member (32); A limiting assembly (4) for limiting the connecting ring (33) is provided on the top surface of the mounting platform (1), the limiting assembly (4) comprising a bracket (41) fixed on the top surface of the mounting platform (1), a mounting shell (42) fixedly connected to the top end of the bracket (41), a linkage member (43) provided in the mounting shell (42), a carrier frame (44) connected to the top end of the linkage member (43), and a card plate (45) connected to the bottom end of the linkage member (43); a bayonet (331) corresponding to the position of the card plate (45) is provided on the circumferential side of the connecting ring (33), and the cross-sectional area of ​​the bayonet (331) is larger than the cross-sectional area of ​​the card plate (45); The linkage member (43) includes a fixed plate (431) fixedly connected to the bottom of the inner wall of the installation shell (42), two vertical rods (432) respectively fixedly connected to the two ends of the top surface of the fixed plate (431), a reset member (433) sleeved on each vertical rod (432), a movable plate (434) slidably connected in the installation shell (42) and located above the fixed plate (431), and a linkage shaft (435) vertically penetrating the movable plate (434) and the fixed plate (431). The top ends of the two vertical rods (432) vertically penetrate the movable plate (434) and are slidably connected to the movable plate (434). The reset member (433) is located between the movable plate (434) and the fixed plate (431). The bottom end of the carrier (44) extends into the mounting shell (42) and is fixedly connected to the top surface of the movable plate (434). The bearing end of the carrier (44) abuts against the outer wall of the working cylinder. A curved groove (4351) is provided on the circumferential side of the linkage shaft (435). A slider (4341) is fixedly connected to the connection between the movable plate (434) and the linkage shaft (435) and is slidably connected to the curved groove (4351). The linkage shaft (435) is rotatably connected to the fixed plate (431). The bottom end of the linkage shaft (435) vertically passes through the mounting shell (42) and extends to the outside of the mounting shell (42). The bottom end of the linkage shaft (435) is fixedly connected to the clamping plate (45).

2. A plastic extrusion device for cable molding according to claim 1, characterized in that: The raw material feeding assembly (23) includes a feeding hopper (231), a feeding barrel (232), a stirring member (233) arranged in the feeding hopper (231), and a spiral feeding member (234) arranged in the feeding barrel (232). The opening at one end of the feeding hopper (231) with a smaller cross-sectional area is detachably connected to the top of the feeding barrel (232) through a flange. The end of the feeding barrel (232) away from the feeding hopper (231) is detachably connected to the top surface of the plasticizing barrel (21). The upper opening of the feeding hopper (231) is fixedly connected to a cover plate (2311), and the cover plate (2311) is fixedly penetrated with a vertically arranged A feeding pipe is provided, a driving member (2312) and a reducer (2313) are installed on the top surface of the cover plate (2311), the output end of the driving member (2312) is fixedly connected to the input end of the reducer (2313), the output end of the reducer (2313) is fixedly connected to the stirring shaft (2314), the stirring member (233) is fixedly connected to the circumference of the stirring shaft (2314), and the stirring member (233) is located in the feeding hopper (231), the spiral feeding member (234) is fixedly connected to the circumference of the stirring shaft (2314), and the spiral feeding member (234) is located in the feeding barrel (232).

3. A plastic extrusion device for cable molding according to claim 2, characterized in that: Each stirring member (233) includes a stirring plate (2331) and a long connecting rod (2332) and a short connecting rod (2333) arranged in parallel up and down and fixedly connected to the circumference of the stirring shaft (2314); the side of the stirring plate (2331) away from the stirring shaft (2314) is close to the inner wall of the feed hopper (231); the top of the side of the stirring plate (2331) close to the stirring shaft (2314) is fixedly connected to the end of the long connecting rod (2332) away from the stirring shaft (2314); the bottom of the side of the stirring plate (2331) close to the stirring shaft (2314) is fixedly connected to the end of the short connecting rod (2333) away from the stirring shaft (2314); and the spiral feeding member (234) is a feeding spiral blade fixedly connected to the circumference of the stirring shaft (2314).

4. A plastic extrusion device for cable molding according to claim 1, characterized in that: The plasticizing cylinder (21) and the barrel of the plastic extruder (11) are detachably connected via a connecting cylinder (12); both ends of each working cylinder are fixedly connected with a connecting body (211); the two connecting bodies (211) on the same end face of the plasticizing cylinder (21) are spliced ​​together to form a flange; a connecting flange (121) is installed at one end of the connecting cylinder (12) close to the plasticizing cylinder (21); the connecting flange (121) and the flange, which are fitted together, are detachably connected via a clamp (25).

5. The plastic extrusion device for cable molding according to claim 1, characterized in that: Two symmetrically arranged electric telescopic rods (13) are hinged on the top surface of the mounting platform (1), and the telescopic ends of the two electric telescopic rods (13) are respectively hinged to the side surfaces of the two working cylinders that are away from each other. The supporting ends of the supporting mechanism (3) are respectively connected to the two working cylinders. The supporting mechanism (3) is provided with two groups, and the electric telescopic rod (13) is located between the two groups of supporting mechanisms (3).

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