A wire drawing device for processing polyphenylene sulfide pellets
By designing cooling rollers and return grooves connected to multiple sets of roller body sections, the problem of broken wire failure affecting other wire drawings when multiple wire drawings are simultaneously transmitted is solved, rapid fault recovery and efficient processing are achieved, and the stability and drying capacity of the wire drawing device are enhanced.
Patent Information
- Application Number
- CN202510609079.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2045-05-13
AI Technical Summary
When multiple wire drawing devices are transmitted simultaneously, if one wire drawing fails, the troubleshooting process can easily affect other wire drawing, resulting in a decrease in processing efficiency.
A wire drawing device for processing polyphenylene sulfide pellets is designed, and a cooling press roller is composed of multiple groups of roller body sections. The roller body sections are connected by a group joint shaft and an interlocking cavity. When the wire is broken, the group joint shaft can be disconnected separately, which facilitates the rapid recovery of the state of the wire drawing bypassing the cooling press roller, and improves the stability of the group joint shaft through buffer springs and limit blocks.
Effectively avoid the impact of wire breakage failure on other wire drawing, improve processing efficiency, and improve the drying capacity of wire drawing through the return channel and blowing module, reducing the workload of fault treatment.
Smart Images

Figure CN120119345B_ABST
Abstract
Description
Technical Field
[0001] A wire drawing device for processing of the present invention, in particular, a wire drawing device for processing polyphenylene sulfide pellet materials applied to the technical field of plastic wire drawing. Background Art
[0002] Polyphenylene sulfide is a polymer containing a repeating structural unit of p-phenylene sulfide in the molecule and is a new type of functional engineering plastic. It has a wide range of applications in the fields of electronics, automobiles, machinery and chemical engineering. Polyphenylene sulfide is also known as polyphenyl sulfide, which is a thermoplastic resin with a phenylthio group in the main chain of the molecule. Polyphenylene sulfide is a crystalline polymer. When processing the wire drawing of polyphenylene sulfide pellet materials, the processed wire drawing needs to be cooled and shaped before it can be wound and stored.
[0003] The specification of Chinese Patent CN119145071B discloses "A wire drawing device for plastic woven bags", which is composed of a cooling box and an auxiliary drying mechanism. A water tank is fixedly installed on the bottom surface of the inner wall of the cooling box. The left side of the top surface of the water tank is rotatably connected with a rotating rod. There is a first transmission roller inside the water tank, and both ends of the first transmission roller are respectively rotatably connected to the front and rear sides of the inner wall of the cooling box; the drawn material is pressed into the water tank by the rotating rod for cooling. The specification of Chinese Patent CN212920418U discloses "A wire drawing device for flexible intermediate bulk containers". Cooling water can be provided for the wire drawing film of the flexible intermediate bulk containers through the water tank. Fixed blocks are installed on the top surfaces of both side walls of the water tank, and a first conveying wheel is installed on the top surface of the fixed block, so that the film can be input or output from the water tank. Since cross beams are installed on both sides of the top cavity of the water tank, the cross beams can provide support for the second conveying wheel and the gantry. A second conveying wheel is installed on the bottom surface of the cross beam, so that the film can be completely immersed in the water in the water tank, and thus the cooling effect on the film can be achieved. Temperature monitoring probes are installed on both sides of the inner cavity side wall of the water tank, so that the temperature monitoring probes can monitor the water temperature in the water tank and send the monitoring data to an external control device.
[0004] When the existing wire drawing devices cool the wire drawing, most of them adopt water cooling and air cooling methods. During the cooling process, guide rollers are required to guide the transmitted wire drawing. Especially for the cooling structure using water cooling method, the transmitted wire drawing needs to be guided by the guide rollers and immersed in the water tank. However, in order to improve the processing efficiency, the existing wire drawing devices generally adopt the method of extruding multiple wire drawings simultaneously. Therefore, there are multiple transmitted wire drawings on the guide rollers at the same time. When a wire breakage fault occurs in one of the wire drawings, the troubleshooting process of this wire drawing is likely to affect other transmitted wire drawings, and the troubleshooting process is relatively difficult, which affects the processing efficiency of the wire drawing device. Summary of the Invention
[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that there are multiple simultaneously transmitted drawn wires on the guide roller of the wire drawing device. When a wire breakage fault occurs in one of the drawn wires, the troubleshooting process of this drawn wire is likely to affect other transmitted drawn wires, and the troubleshooting process is relatively difficult, which affects the processing efficiency of the wire drawing device.
[0006] To solve the above problems, the present invention provides a wire drawing device for processing polyphenylene sulfide pellet materials, including a device base. At both ends of the device base, a material wire drawing machine and a winding mechanism are respectively fixedly connected. A cooling water tank is fixedly connected between the bottoms of the material wire drawing machine and the winding mechanism. A cooling pressure roller is rotatably connected to the middle of the cooling water tank. A drawn wire is transmitted between the material wire drawing machine and the winding mechanism, and the drawn wire is in rolling connection with the lower surface of the cooling pressure roller;
[0007] The cooling pressure roller is composed of multiple groups of roller body joints connected. A wire groove is provided on the outer surface of the middle part of the roller body joint, corresponding to the drawn wire. Expansion chambers and insertion chambers are respectively provided at both ends of the roller body joint. A connecting shaft is movably inserted into the expansion chamber. The outer end of the connecting shaft is inserted into the insertion chamber. A combination disc is provided outside the end of the roller body joint where the expansion chamber is located. An elastic membrane ring is fixedly connected between the combination disc and the roller body joint, and the combination disc is buckled and corresponding to the end of the next roller body joint close to the insertion chamber. A through hole is provided on the surface of the combination disc, and the connecting shaft passes through the through hole correspondingly. An inclined pin is fixedly connected to the outer surface of the connecting shaft, and a pin groove is provided at one end of the through hole corresponding to the inclined pin.
[0008] In the above-mentioned wire drawing device for processing polyphenylene sulfide pellet materials, the drawn wire bypasses the bottom of the cooling pressure roller and immerses in the cooling water tank to realize water cooling of the drawn wire. And when a wire breakage occurs in the drawn wire, by separately disconnecting the connection between the roller body joints, it is convenient to quickly restore the state of the drawn wire bypassing the cooling pressure roller, effectively avoiding affecting the processing process of other drawn wires.
[0009] As a further improvement of the present application, an inner content groove is provided at the inner end of the connecting shaft, and a buffer spring is sleeved inside the content groove. The buffer spring is fixedly connected to the inner end of the expansion chamber, and the telescopic movement of the connecting shaft in the expansion chamber is realized through the elastic force of the buffer spring.
[0010] As a further further improvement of the present application, limiting blocks are fixedly connected to both ends of the outlet of the content groove, limiting sliding grooves are provided at both ends of the inner wall of the expansion chamber, and the limiting blocks are in sliding connection with the limiting sliding grooves. A sealing ring is fixedly inserted inside the outlet end of the expansion chamber, and the outer end outlet of the limiting sliding groove is sealed corresponding to the sealing ring. By the sliding of the limiting blocks in the limiting sliding grooves, the telescopic length of the connecting shaft is restricted, effectively improving the stability of the telescopic installation of the connecting shaft.
[0011] As a further improvement of the present application, fixed operating rods are fixedly connected to both the top and bottom of the combined disc. Movable operating rods are movably connected to both the left and right ends of the combined disc. The elastic membrane ring is made of elastic rubber material. Through the elasticity of the elastic membrane ring, the combined disc is buckled and combined with the next roller section. The translation operation of the combined disc is realized through the fixed operating rod, which facilitates the separation of the combined disc from the next roller section.
[0012] As another improvement of the present application, a thrust slider is fixedly connected to the inner end of the movable operating rod. The thrust slider slides correspondingly with the hypotenuse of the inclined pin. By applying a thrust to the thrust slider through the movable operating rod, the hypotenuse of the inclined pin is pushed by the thrust slider, thereby compressing the connecting shaft into the telescopic cavity.
[0013] As a supplement to another improvement of the present application, equally spaced arranged return channels are fixedly connected between the winding mechanism and the cooling water tank. The cross-section of the return channel is arranged in a C shape, and the return channel is sleeved with the wire drawing. The wire drawing cooled by water enters the return channel and is transmitted to the winding mechanism. The water on the surface of the wire drawing drips into the return channel during the transmission process, and finally the water returns to the cooling water tank through the return channel.
[0014] As a supplement to another improvement of the present application, a roller shaft ring is fixedly connected to the bottom end of the return channel. The roller shaft ring is rotatably connected to the roller section. The roller shaft ring provides stable rotational support for the roller section, effectively improving the stability when the adjacent two roller sections are disconnected.
[0015] As another improvement of the present application, an air inlet is opened at the top end of the return channel. A blowing module is rotatably connected to one end of the top of the winding mechanism close to the cooling water tank. The blowing module is vertically corresponding to the air inlet. A wind shielding plate is hinged to the top of the roller shaft ring, and the top end of the wind shielding plate is movably connected to the top of the air inlet. By blowing air from the blowing module into the air inlet, an air flow towards the cooling water tank is formed in the return channel, effectively improving the surface drying ability of the wire drawing. By using the wind shielding plate to shield the C-shaped opening at the top of the return channel, the air leakage situation is effectively reduced.
[0016] In summary, in the present invention, the molten polyphenylene sulfide pellet material is extruded by the material wire drawing machine, and the polyphenylene sulfide pellet material is processed into filamentous wire drawing. Subsequently, the wire drawing bypasses the bottom of the cooling roller and immerses in the cooling water tank to realize the water cooling of the wire drawing. Finally, the winding mechanism winds it up. When the wire drawing breaks, the combined disc is pushed to separate from the next roller section, and then the insertion of the connecting shaft and the insertion cavity is alternately disconnected in sequence, which is convenient for quickly restoring the state of the wire drawing bypassing the cooling roller, effectively reducing the workload of troubleshooting the wire drawing device, and effectively avoiding affecting the processing process of other wire drawings, effectively improving the processing efficiency of the wire drawing device. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional structure diagram of the first embodiment of the present application;
[0018] Figure 2 This is a three-dimensional structure diagram of the cooling pressure roller and the winding mechanism in the first embodiment of the present application;
[0019] Figure 3 This is a three-dimensional structure diagram of the roller body section in the first embodiment of the present application;
[0020] Figure 4 This is a cross-sectional view of the roller body section in the first embodiment of the present application;
[0021] Figure 5 This is a demonstration diagram of the disconnected state between the roller body sections in the first embodiment of the present application;
[0022] Figure 6 This is a cross-sectional three-dimensional structure diagram of the telescopic cavity in the first embodiment of the present application;
[0023] Figure 7 This is a demonstration diagram of the connecting shaft retracting into the telescopic cavity in the first embodiment of the present application;
[0024] Figure 8 This is a three-dimensional structure diagram of the combination disk in the first embodiment of the present application;
[0025] Figure 9 This is a three-dimensional structure diagram of the roller body section and the return channel in the second embodiment of the present application;
[0026] Figure 10 This is a three-dimensional structure diagram of the return channel and the roller shaft ring in the second embodiment of the present application.
[0027] Description of the reference numerals in the figure:
[0028] 1. Device base; 101. Material wire drawing machine; 102. Winding mechanism; 103. Cooling water tank; 104. Wire drawing; 2. Cooling pressure roller; 201. Roller body section; 202. Wire groove; 203. Telescopic cavity; 204. Insertion cavity; 205. Elastic film ring; 206. Combination disk; 207. Perforation; 208. Fixed operating rod; 209. Movable operating rod; 210. Thrust slider; 3. Connecting shaft; 301. Oblique pin; 302. Pin groove; 303. Content groove; 304. Buffer spring; 305. Limit block; 306. Limit sliding groove; 307. Sealing ring; 4. Return channel; 401. Roller shaft ring; 402. Air inlet; 403. Blowing module; 404. Wind shielding plate. Detailed implementation manners
[0029] The following provides a detailed description of the two embodiments of the present application with reference to the accompanying drawings.
[0030] First embodiment:
[0031] Figures 1 to 2Shown is a wire drawing device for processing polyphenylene sulfide pellet materials, including a device base 1. At both ends of the device base 1, a material wire drawing machine 101 and a winding mechanism 102 are respectively fixedly connected. A cooling water tank 103 is fixedly connected between the bottoms of the material wire drawing machine 101 and the winding mechanism 102. A cooling pressure roller 2 is rotatably connected to the middle of the cooling water tank 103. A wire drawing 104 is transmitted between the material wire drawing machine 101 and the winding mechanism 102, and the wire drawing 104 is in rolling connection with the lower surface of the cooling pressure roller 2;
[0032] When wire drawing for processing polyphenylene sulfide pellet materials, the polyphenylene sulfide pellet materials are heated to a molten state in the material wire drawing machine 101. Subsequently, the material wire drawing machine 101 extrudes the molten polyphenylene sulfide pellet materials into filaments to obtain the wire drawing 104. The wire drawing 104 bypasses the bottom of the cooling pressure roller 2 to be immersed in the cooling water tank 103, realizing water cooling and shaping of the wire drawing 104. Subsequently, the winding mechanism 102 is used to wind the wire drawing 104. The material wire drawing machine 101 is prior art and will not be elaborated here.
[0033] Figures 3 to 7 Shown is that the cooling pressure roller 2 is composed of a plurality of roller sections 201 connected in series. A wire groove 202 is formed on the outer surface of the middle part of the roller section 201. The wire groove 202 corresponds to the wire drawing 104. Expansion chambers 203 and insertion chambers 204 are respectively formed at both ends of the roller section 201. A connection shaft 3 is movably inserted into the expansion chamber 203. The outer end of the connection shaft 3 is inserted into the insertion chamber 204. An inner cavity 303 is formed at the inner end of the connection shaft 3. A buffer spring 304 is sleeved inside the inner cavity 303. The buffer spring 304 is fixedly connected to the inner end of the expansion chamber 203. The elastic force of the buffer spring 304 is used to realize the telescopic movement of the connection shaft 3 in the expansion chamber 203. Limit blocks 305 are fixedly connected to both ends of the outlet of the inner cavity 303. Limit sliding grooves 306 are formed at both ends of the inner wall of the expansion chamber 203. The limit blocks 305 are in sliding connection with the limit sliding grooves 306. A sealing ring 307 is fixedly inserted into the outlet end of the expansion chamber 203. The outer end outlet of the limit sliding groove 306 is closed corresponding to the sealing ring 307. By the sliding of the limit blocks 305 in the limit sliding grooves 306, the telescopic length of the connection shaft 3 is restricted, effectively improving the stability of the telescopic installation of the connection shaft 3;
[0034] The cooling pressure roller 2 is composed of multiple groups of roller body segments 201. The connection between adjacent two groups of roller body segments 201 is achieved through the insertion of the connecting shaft 3 into the insertion cavity 204. There are two groups of insertions of the connecting shaft 3 and the insertion cavity 204 on the left and right at the same time, and the disconnection operation is carried out before and after the two groups of insertion structures, effectively avoiding the complete disconnection of adjacent two groups of roller body segments 201, thus effectively avoiding affecting the stability effect of the cooling pressure roller 2. The elastic force of the buffer spring 304 is used to realize the telescopic movement of the connecting shaft 3 in the telescopic cavity 203. At the same time, the limiting block 305 is slidably connected with the limiting chute 306, and the sealing ring 307 seals the outer end outlet of the limiting chute 306, realizing the limitation of the telescopic length of the connecting shaft 3 and effectively improving the stability of the telescopic installation of the connecting shaft 3.
[0035] Figures 4 to 8 As shown, at the outer part of one end of the roller body segment 201 where the telescopic cavity 203 is opened, there is a combination disc 206. A flexible film ring 205 is fixedly connected between the combination disc 206 and the roller body segment 201. And the combination disc 206 is buckled corresponding to one end of the next roller body segment 201 close to the insertion cavity 204. A through hole 207 is opened on the surface of the combination disc 206, and the connecting shaft 3 passes through the through hole 207 correspondingly. An inclined pin 301 is fixedly connected to the outer surface of the connecting shaft 3. A pin groove 302 is opened at one end of the through hole 207 corresponding to the inclined pin 301. Fixed operating rods 208 are fixedly connected to both the top and bottom of the combination disc 206. Movable operating rods 209 are movably connected to both the left and right ends of the combination disc 206. The flexible film ring 205 is made of elastic rubber material. Through the elasticity of the flexible film ring 205, the buckling combination of the combination disc 206 and the next roller body segment 201 is realized. The translation operation of the combination disc 206 is realized through the fixed operating rods 208, facilitating the separation of the combination disc 206 from the next roller body segment 201. A thrust slider 210 is fixedly connected to the inner end of the movable operating rod 209. The thrust slider 210 is slidably corresponding to the hypotenuse of the inclined pin 301. By applying a thrust to the thrust slider 210 through the movable operating rod 209, the thrust slider 210 is made to push the hypotenuse of the inclined pin 301, thereby compressing the connecting shaft 3 into the telescopic cavity 203.
[0036] When performing the disconnection operation of two adjacent roller body sections 201, use the fixed operating lever 208 to push the combined disk 206 to separate from the next roller body section 201, compress the elastic rubber material diaphragm ring 205, so as to expose the connecting shaft 3 inserted and combined with the insertion cavity 204. Then use the movable operating lever 209 to apply a thrust to the thrust slider 210, so that the thrust slider 210 pushes the hypotenuse of the inclined pin 301, thereby compressing the connecting shaft 3 into the telescopic cavity 203, realizing the separation of the connecting shaft 3 from the insertion cavity 204, effectively reducing the difficulty of the disconnection operation of two adjacent roller body sections 201. And subsequently, the combined disk 206 resumes the snap connection with the next roller body section 201, effectively closing the insertion structure of the connecting shaft 3 and the insertion cavity 204, thus effectively avoiding the influence of the water in the cooling water tank 103 on the connecting shaft 3 and the insertion cavity 204.
[0037] The second implementation mode:
[0038] Compared with the first implementation mode, a return flow groove 4 is mainly added. The specific added structure is as follows, and the rest of the structures are the same as those of the first implementation mode.
[0039] Figure 1 and Figures 9 to 10 As shown, there are equidistantly arranged return flow grooves 4 fixedly connected between the winding mechanism 102 and the cooling water tank 103. The cross-section of the return flow groove 4 is C-shaped, and the return flow groove 4 is sleeved with the wire drawing 104. The water-cooled wire drawing 104 enters the return flow groove 4 and is transmitted to the winding mechanism 102. The water on the surface of the wire drawing 104 drips into the return flow groove 4 during the transmission process, and finally the water returns to the cooling water tank 103 through the return flow groove 4. The bottom end of the return flow groove 4 is fixedly connected with a roller shaft ring 401, and the roller shaft ring 401 is rotatably connected with the roller body section 201. The roller shaft ring 401 provides stable rotational support for the roller body section 201, effectively improving the stability when two adjacent roller body sections 201 are disconnected. An air inlet 402 is opened at the top end of the return flow groove 4. One end of the top of the winding mechanism 102 close to the cooling water tank 103 is rotatably connected with a blowing module 403. The blowing module 403 is vertically corresponding to the air inlet 402. The top of the roller shaft ring 401 is hinged with a wind shielding plate 404, and the top end of the wind shielding plate 404 is movably connected with the top of the air inlet 402. Use the blowing module 403 to blow air into the air inlet 402 to realize the air flow in the return flow groove 4 towards the cooling water tank 103, effectively improving the surface drying ability of the wire drawing 104. Use the wind shielding plate 404 to shield the C-shaped opening at the top of the return flow groove 4, effectively reducing the air leakage situation;
[0040] When the water-cooled wire drawing 104 enters the return tank 4 and is transmitted to the coiling mechanism 102, the blowing module 403 blows air into the air inlet 402 to achieve an air flow in the return tank 4 towards the cooling water tank 103. The air flow is used to dry the water on the surface of the wire drawing 104 and prevent the attached water droplets from following the wire drawing 104, facilitating the water droplets on the surface of the wire drawing 104 to fall into the return tank 4. Finally, the water returns to the cooling water tank 103 through the return tank 4, thereby effectively improving the drying effect of the wire drawing 104. The roller ring 401 provides stable rotational support for the roller body section 201, effectively improving the stability when the adjacent two roller body sections 201 are disconnected. And the wind shielding plate 404 shields the C-shaped opening at the top of the return tank 4, effectively reducing the air leakage situation.
[0041] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the protection scope is not limited to this. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.
Claims
1. A wire drawing device for processing polyphenylene sulfide pellet materials, characterized in that: It includes a device base (1), with a material wire drawing machine (101) and a winding mechanism (102) fixedly connected to both ends of the device base (1) respectively. A cooling water tank (103) is fixedly connected between the bottoms of the material wire drawing machine (101) and the winding mechanism (102). A cooling pressure roller (2) is rotatably connected to the middle of the cooling water tank (103). A wire drawing (104) is transmitted between the material wire drawing machine (101) and the winding mechanism (102), and the wire drawing (104) is in rolling connection with the lower surface of the cooling pressure roller (2). The cooling pressure roller (2) is composed of a plurality of roller sections (201) connected in series. A wire groove (202) is formed on the outer surface of the middle part of the roller section (201), and the wire groove (202) corresponds to the wire drawing (104). Expansion cavities (203) and insertion cavities (204) are respectively formed at both ends of the roller section (201). A connecting shaft (3) is movably inserted into the expansion cavity (203), and the outer end of the connecting shaft (3) is inserted into the insertion cavity (204). A combination disc (206) is arranged outside one end of the roller section (201) where the expansion cavity (203) is formed. An elastic membrane ring (205) is fixedly connected between the combination disc (206) and the roller section (201), and the combination disc (206) is buckled and corresponding to one end of the next roller section (201) close to the insertion cavity (204). A through hole (207) is formed on the surface of the combination disc (206), and the connecting shaft (3) passes through the through hole (207) correspondingly. An inclined pin (301) is fixedly connected to the outer surface of the connecting shaft (3), and a pin groove (302) is formed at one end of the through hole (207) corresponding to the inclined pin (301). Fixed operating rods (208) are fixedly connected to both the top and bottom of the combination disc (206). Movable operating rods (209) are movably connected to both the left and right ends of the combination disc (206). The elastic membrane ring (205) is made of elastic rubber material. A thrust slider (210) is fixedly connected to the inner end of the movable operating rod (209), and the thrust slider (210) slides correspondingly along the hypotenuse of the inclined pin (301).
2. The wire drawing device for processing polyphenylene sulfide pellet according to claim 1, characterized in that: An inner content groove (303) is formed at the inner end of the connecting shaft (3), and a buffer spring (304) is sleeved inside the content groove (303). The buffer spring (304) is fixedly connected to the inner end of the expansion cavity (203).
3. The wire drawing device for processing polyphenylene sulfide pellet according to claim 2, characterized in that: Limit blocks (305) are fixedly connected to both ends of the outlet of the content groove (303). Limit sliding grooves (306) are formed at both ends of the inner wall of the expansion cavity (203). The limit blocks (305) are slidably connected to the limit sliding grooves (306). A sealing ring (307) is fixedly inserted into the inner part of the outlet end of the expansion cavity (203), and the outer end outlet of the limit sliding groove (306) is hermetically corresponding to the sealing ring (307).
4. A wire drawing device for processing polyphenylene sulfide pellet materials according to claim 1, characterized in that: Equidistantly arranged return channels (4) are fixedly connected between the winding mechanism (102) and the cooling water tank (103). The cross-section of the return channel (4) is C-shaped, and the return channel (4) is sleeved with the wire drawing (104).
5. The wire drawing device for processing polyphenylene sulfide pellet according to claim 4, wherein: The bottom end of the reflux tank (4) is fixedly connected with a roller ring (401), and the roller ring (401) is rotationally connected with a roller section (201).
6. The wire drawing device for processing polyphenylene sulfide pellet according to claim 5, characterized in that: An air inlet (402) is provided at the top end of the reflux tank (4). One end of the top of the winding mechanism (102) close to the cooling water tank (103) is rotationally connected with a blowing module (403). The blowing module (403) is vertically corresponding to the air inlet (402). A wind shielding plate (404) is hinged to the top of the roller ring (401), and the top end of the wind shielding plate (404) is movably connected with the top of the air inlet (402).
Citation Information
Patent Citations
A plastic woven bag wire drawing device
CN119145071B
Container bag wire drawing equipment
CN212920418U
Cooling and dehydrating device for reducing internal stress of plastic particles and production technology
CN109130140A
Copper wire anti-winding and deoxidizing equipment
CN114192591A
Blow-drying device of plastic wire drawing machine
CN211389777U