Automatic plastic pipe winding machine

Abstract

The application discloses a kind of plastic pipe automatic winding machine, it is related to plastic pipe production field, including mould drive mechanism, winding mould pipe and forming plastic pipe conveying mechanism, mould drive mechanism includes base, sliding bottom plate and roller bracket, sliding bottom plate is slidably installed on base, multiple groups of roller bracket are installed with interval on sliding bottom plate, winding mould pipe is placed on roller bracket, cooling pipe is fixedly installed in winding mould pipe, and a plurality of independent cooling cavities are formed between the inner wall and the outer wall of winding mould pipe along its own axial direction, each cooling cavity is provided with air inlet hose, and the two ends of air inlet hose are connected with the inner wall of winding mould pipe and cooling pipe respectively, heating mechanism includes flame gun towards winding mould pipe installation, forming plastic pipe conveying mechanism is used to convey material belt to winding mould pipe, and plastic pipe is conveyed to winding material belt, on the one hand, it reduces the shrinkage pulling force generated in later period, on the other hand, it reduces the winding coverage area of front and rear material belt.

Description

Technical Field

[0001] This invention relates to the field of plastic pipe production, specifically to an automatic plastic pipe winding machine. Background Technology

[0002] Plastic pipes, with their advantages of being lightweight, high-strength, corrosion-resistant, and easy to install, have been widely used in many fields such as municipal water supply and drainage, industrial fluid transportation, and oil and gas pipelines. Among them, Krah pipes are widely used. Krah pipes are hot-wound structural wall pipes made from high-density polyethylene (HDPE) and other polymer materials through a hot-wound welding process. Due to their excellent ring stiffness, corrosion resistance, and settlement resistance, they are one of the mainstream products that replace traditional concrete pipes and ordinary plastic pipes.

[0003] The core production process for current Krah tubing is hot-winding and welding: a strip of preform is heated to a molten state and then wound around a rotating mold. The preform's inherent fusibility allows for thermal fusion between adjacent strips. Simultaneously, the mold's rotation and axial feed create a pipe wall structure with annular reinforcing ribs. However, in actual production, the thermal expansion and contraction characteristics of plastic materials present unavoidable technical challenges to product quality. During hot-winding, the molten plastic preform expands significantly upon heating, while the already wound and initially cooled pipe section contracts as the temperature drops, creating a continuous shrinkage force. This shrinkage force acts directly on the hot-welding interface of the preform. Before the interface fully cools and solidifies, the shrinkage force disrupts the molten bond, potentially reducing the weld strength and causing leakage during subsequent use, or even causing the weld to detach and rendering the product unusable. To alleviate this problem, existing technologies commonly employ an improved solution that increases the winding coverage area. This involves increasing the coverage width of the subsequent coil over the preceding coil, utilizing a larger bonding area to disperse shrinkage tension and thus prevent the thermally bonded surfaces from separating. However, this solution has significant limitations: First, it substantially increases material consumption. Typically, for every 15%-25% increase in coverage area, the material cost per unit length of pipe rises accordingly, resulting in severe material waste. Second, it fails to address the issue of inconsistent cooling and shrinkage. Due to differences in heat dissipation efficiency across different areas of the mold, the cooling rates in the circumferential and axial directions of the pipe are uneven, leading to varying degrees of shrinkage. This not only results in uneven pipe wall thickness and poor surface smoothness but also causes the spacing deviation of the annular reinforcing ribs on the outer side of the pipe to exceed industry standard requirements, thereby affecting the uniformity of the pipe's ring stiffness and its appearance quality. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic plastic pipe winding machine to solve the deficiencies of the prior art.

[0005] The objective of this invention is achieved through the following technical solution: an automatic plastic pipe winding machine, comprising a mold driving mechanism, a winding mold tube, a forming plastic pipe conveying mechanism, and a vision imaging mechanism. The mold driving mechanism includes a base, a sliding base plate, and roller frames. The sliding base plate is slidably mounted on the base, and multiple sets of roller frames are spaced apart on the sliding base plate. The winding mold tube is placed on the roller frames, and a cooling pipe is fixedly installed inside the winding mold tube. Several independent cooling chambers are formed along the axial direction between the inner and outer walls of the winding mold tube. Each cooling chamber is equipped with an air inlet hose, and the two ends of the air inlet hose are respectively connected to the cooling pipe and the inner wall of the winding mold tube. A heating mechanism is provided on the outer side of the winding mold tube, and the heating mechanism includes a flame gun installed facing the winding mold tube. The forming plastic pipe conveying mechanism is used to convey the material strip onto the winding mold tube and complete the winding by rotating the winding mold tube. At the same time, the forming plastic conveying mechanism conveys the plastic pipe onto the winding material strip. The vision imaging mechanism includes an industrial camera arranged on the outer side of the winding mold tube, and the industrial camera is used to image the position of the material strip after cooling.

[0006] Furthermore, the molding plastic tube conveying mechanism includes a conveying frame, a material belt conveying roller, and a plastic tube conveying roller. Two sets of plastic tube conveying rollers are rotatably mounted on the conveying frame, and the plastic tube passes through the two sets of plastic tube conveying rollers. The material belt conveying roller is rotatably mounted on the conveying frame, and the material belt is conveyed above the plastic tube to make the material belt wrap around the winding mold tube and the plastic tube wrap around the material belt.

[0007] Furthermore, the conveyor frame is equipped with a material belt hot-melt assembly and a plastic tube hot-melt assembly. The material belt hot-melt assembly includes a hot-melt seat, which is fixed on the conveyor frame. The hot-melt seat is provided with a hot-melt channel through which the material belt passes. An electric heating plate is installed in the hot-melt channel. The plastic tube hot-melt assembly includes a hot-melt pipe fixed on the conveyor frame. Several electric heating rings are fitted along the axial direction of the hot-melt pipe.

[0008] Furthermore, the hot melt seat includes an upper seat body and a lower seat body. The lower seat body is mounted on the conveyor frame via a bracket. A lead screw is rotatably connected to the lower seat body, and a guide rod is fixed to the lower seat body. The upper seat body has a threaded hole and a guide hole. The lead screw is threaded into the threaded hole, and the guide rod is slidably adapted to the guide hole. One end of the lead screw passes through the bottom of the lower seat body and is connected to an adjusting nut.

[0009] Furthermore, the conveyor frame is equipped with a strip extrusion mechanism and a plastic tube extrusion mechanism. The strip extrusion mechanism includes an extrusion bracket, an extrusion arm, an extrusion roller, and an extrusion cylinder. The extrusion bracket is fixed on the conveyor frame. One end of the extrusion arm is fixed with a deflection shaft. The axis of the deflection shaft is parallel to the axis of the winding mold tube and is rotatably connected to the extrusion bracket. The extrusion roller is rotatably mounted on the top of the extrusion arm. The cylinder body of the extrusion cylinder is hinged to the extrusion bracket, and the telescopic shaft of the extrusion cylinder is hinged to the extrusion arm. The plastic tube extrusion mechanism includes an extrusion base plate, a pad, an extrusion seat, a U-shaped lifting frame, and a plastic tube extrusion roller. The extrusion base plate is fixed on the conveyor frame. The pad is mounted on the top surface of the extrusion base plate by a first screw. The extrusion seat is mounted on the top surface of the pad by a second screw. The U-shaped lifting frame is mounted on the extrusion seat and has the freedom to move along the height direction of the extrusion seat. The plastic tube extrusion roller is rotatably mounted on the U-shaped lifting frame.

[0010] Furthermore, the extrusion seat is provided with a driving cavity, and a lower wedge block is slidably disposed in the driving cavity. An upper wedge block is slidably fitted on the top surface of the lower wedge block. The mating surface between the upper and lower wedge blocks is an inclined surface. A guide window communicating with the driving cavity is opened on the top surface of the extrusion seat. A guide post is fixed on the top of the upper wedge block. The guide post passes through the guide window and connects to a U-shaped lifting frame. A plastic tube extrusion cylinder is horizontally installed on the extrusion seat. The telescopic shaft of the plastic tube extrusion cylinder is movably inserted into the driving cavity and connected to the lower wedge block.

[0011] Furthermore, a U-shaped seat is fixed to the bottom of the extrusion arm, with the opening of the U-shaped seat facing downwards. A deflection arm is provided inside the opening of the U-shaped seat. A rotating shaft is fixed to one end of the deflection arm, and a hot air plate is fixed to the other end. The rotating shaft is rotatably connected to the U-shaped seat. A hot air cavity is formed inside the hot air plate. Several hot air holes are opened at the end of the hot air plate away from the deflection arm. The hot air holes are connected to the hot air cavity. The hot air blown out of the hot air holes acts on the gap between the plastic tube extrusion roller and the winding mold tube. A fastening screw is threadedly connected to the U-shaped seat, and the fastening screw abuts against the deflection arm.

[0012] Furthermore, the winding mold tube includes an end mold tube, a middle mold tube, and a series shaft. Several middle mold tubes are arranged between two end mold tubes. Both the middle mold tubes and the end mold tubes are mounted on the series shaft. The cooling tube is installed on the series shaft. A solenoid valve is connected to the air inlet hose. Cooling chambers are formed inside both the end mold tubes and the middle mold tubes. Each cooling chamber is equipped with an exhaust port. The exhaust port and the air inlet hose are respectively arranged at both ends of the cooling chamber.

[0013] Furthermore, the middle mold tube includes two half mold tubes, and cooling grooves are provided on the opposite end faces of the two half mold tubes. The two half mold tubes are connected together by screws to form a cooling cavity with the two cooling grooves. The structure of the end mold tube is the same as that of the middle mold tube.

[0014] Furthermore, a lead screw groove is provided on the top surface of the base, and a drive lead screw is rotatably installed in the lead screw groove. A lead screw nut is threaded onto the drive lead screw, and the sliding base plate is fixedly installed on the lead screw nut. A lead screw motor is installed at one end of the base, and the output shaft of the lead screw motor is connected to the drive lead screw.

[0015] The beneficial effects of this invention are:

[0016] 1. The winding mold tube is heated by a blowtorch, ensuring that the molten material strip remains molten and covers the winding mold tube. The rotation and axial movement of the winding mold tube pull the material strip to complete the winding process. Simultaneously, the molten plastic tube forms a ring-shaped reinforcing rib on the material strip. After each turn of winding, cold air is introduced into the cooling chamber of that area of ​​the winding mold tube to cool the material strip. At the same time, the blowtorch heats the next area of ​​the winding mold tube, preventing mutual interference. After the initial cooling of the wound material strip and plastic tube, the material strip and plastic tube in the winding area partially shrink. This reduces the shrinkage and pulling force generated by the subsequent cooling and also reduces the winding coverage area of ​​the material strip, greatly reducing costs.

[0017] 2. By capturing the position of the strip after cooling in real time with an industrial camera, winding deviations can be detected and feedback can be provided for adjustment. The mold drive mechanism adopts a transmission method of lead screw motor and drive screw. Combined with the cooling position of the strip fed back by the industrial camera, the axial feed of the sliding base plate is controlled. This allows for real-time adjustment of the winding coverage area of ​​the front and rear strips. Under the premise of inconsistent initial cooling, the coverage area of ​​the front and rear strips is guaranteed to be the same, and the spacing of the annular reinforcing ribs is the same, thereby improving the production quality of carat tubes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an automatic plastic pipe winding machine according to the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of an automatic plastic pipe winding machine according to the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the structure of an automatic plastic pipe winding machine according to the present invention. Figure 3 ;

[0021] Figure 4This is a schematic diagram of the structure of an automatic plastic pipe winding machine according to the present invention. Figure 4 ;

[0022] Figure 5 This is a schematic diagram of the structure of an automatic plastic pipe winding machine according to the present invention. Figure 5 ;

[0023] Figure 6 This is a schematic diagram of the structure of an automatic plastic pipe winding machine according to the present invention. Figure 6 ;

[0024] Figure 7 This is a schematic diagram of the internal structure of the winding mold tube in an automatic plastic pipe winding machine of the present invention;

[0025] Figure 8 This is a schematic diagram of the internal structure of the extrusion seat in an automatic plastic pipe winding machine according to the present invention;

[0026] In the diagram, 1-winding mold tube, 2-base, 3-sliding base plate, 4-roller frame, 5-cooling pipe, 6-cooling chamber, 7-air inlet hose, 8-flame gun, 9-conveyor frame, 10-material belt conveyor roller, 11-plastic tube conveyor roller, 12-industrial camera, 13-hot melt seat, 14-hot melt channel, 15-electric heating plate, 16-hot melt pipe, 17-electric heating ring, 18-upper seat body, 19-lower seat body, 20-lead screw, 21-guide rod, 22-threaded hole, 23-guide hole, 24-adjusting nut, 25-extrusion bracket, 26-extrusion arm, 27-extrusion roller, 28-extrusion cylinder, 29-deflection shaft, 30-extrusion base plate, 31-pad, 32-extrusion seat, 33- U-shaped lifting frame, 34-plastic tube extrusion roller, 35-drive cavity, 36-lower wedge block, 37-upper wedge block, 38-guide column, 39-plastic tube extrusion cylinder, 40-U-shaped seat, 41-deflection arm, 42-hot air plate, 43-hot air hole, 44-fastening screw, 45-end mold tube, 46-middle mold tube, 47-connecting shaft, 48-vent hole, 49-screw groove, 50-drive screw, 51-screw motor, 52-lower arc mold plate, 53-upper arc mold plate, 54-middle arc mold plate, 55-shaft one, 56-shaft two, 57-U-shaped linkage, 58-rib plate, 59-mold mounting ring, 60-drive inner plate, 61-long shaft connecting rod, 62-pull rod, 63-axial slide, 64-demolding threaded tube, 65-pulling rod. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0028] Example 1

[0029] like Figures 1 to 8As shown, an automatic plastic pipe winding machine includes a mold driving mechanism, a winding mold tube 1, a forming plastic pipe conveying mechanism, and a vision imaging mechanism. The mold driving mechanism includes a base 2, a sliding base plate 3, and roller frames 4. The sliding base plate 3 is slidably mounted on the base 2. Multiple sets of roller frames 4 are spaced apart on the sliding base plate 3. Preferably, two sets of roller frames 4 are used. The winding mold tube 1 is located between the two sets of roller frames 4 as a winding forming area. The winding mold tube 1 is placed on the roller frames 4. A cooling pipe 5 is fixedly installed inside the winding mold tube 1. Several independent cooling chambers 6 are formed along its own axial direction between the inner wall and the outer wall of the winding mold tube 1. Each cooling chamber 6 is equipped with an air inlet hose 7. The two ends of the air inlet hose 7 are respectively connected to the cooling pipe 5 and the inner wall of the winding mold tube 1. A heating mechanism is provided on the outside of tube 1. The heating mechanism includes a blowtorch 8 mounted towards the winding mold tube 1. A molding plastic tube conveying mechanism is used to convey the material strip onto the winding mold tube 1 and complete the winding by rotating the winding mold tube 1. At the same time, the molding plastic conveying mechanism conveys the plastic tube onto the winding material strip. The visual imaging mechanism includes an industrial camera 12 arranged on the outside of the winding mold tube 1. The industrial camera 12 is used to image the position of the material strip after cooling. The production process of the carat tube is as follows: the winding mold tube 1 of the corresponding diameter is placed on the roller frame 4 of the mold drive mechanism. The winding mold tube 1 is heated by the blowtorch 8. The roller frame 4 drives the winding mold tube 1 to rotate, completing the circumferential heating of the winding mold tube 1. Then the winding mold tube 1 is slid... The base plate 3 moves to feed the material, allowing the flame gun 8 to heat the next area of ​​the winding mold tube 1. The worker covers the heated area of ​​the winding mold tube 1 with the molten material strip, and then heat-bonds the molten plastic tube to the material strip, connecting the molten material strip and the plastic tube into one piece. Coordinating with the rotation of the winding mold tube 1, one turn of winding is completed. After one turn is completed, the cooling chamber 6 in this area is circulated with cold air through the cooling pipe 5 and the air inlet hose 7 to cool the wound material strip, causing the material strip and plastic tube to initially cool and shrink. This reduces the shrinkage tension of the preceding material strip before the next winding, ensuring that the material strip connection will not detach due to subsequent large shrinkage tension. The industrial camera 12 can image the shrunken material strip. The position is controlled by adjusting the feed amount of the sliding base plate 3 based on feedback, so that the next piece of material strip covers the previous piece of material strip. This allows for precise control of the coverage area. When the tensile force is reduced, the coverage area can be reduced, thus lowering costs. Since the inner side of the material strip directly contacts the winding mold tube 1 for cooling, while the outer side of the material strip does not directly contact the winding mold tube 1, the covering area can be in a hot-melt state again under the influence of the temperature of the next hot-melt material strip. This allows the two rounds of material strip to be smoothly fused together. This process is repeated to complete the winding and forming of the Krah tube. After forming, the material strip and plastic tube are cut off. At this time, the cooling pipe 5 introduces cold air into all the cooling chambers 6, which can accelerate the cooling of the Krah tube and ensure uniform cooling.This process minimizes subsequent shrinkage and ensures more uniform shrinkage of the kraft tubing, while keeping the spacing deviation of the annular reinforcing ribs within industry standard limits, significantly improving the uniformity and appearance quality of the kraft tubing.

[0030] Furthermore, a lead screw groove 49 is provided on the top surface of the base 2, and a drive lead screw 50 is rotatably installed in the lead screw groove 49. A lead screw nut is threaded onto the drive lead screw 50, and a sliding base plate 3 is fixedly installed on the lead screw nut. A lead screw motor 51 is installed at one end of the base 2, and the output shaft of the lead screw motor 51 is connected to the drive lead screw 50. The lead screw motor 51 drives the drive lead screw 50 to rotate, causing the lead screw nut to drive the sliding base plate 3 to move along the axial direction of the drive lead screw 50. The direction of movement is along the axial direction of the winding mold tube 1, and the precise feeding of winding is achieved through the lead screw transmission pair.

[0031] Example 2

[0032] Based on Example 1, such as Figures 1 to 7 As shown, the winding mold tube 1 includes end mold tubes 45, middle mold tubes 46, and a connecting shaft 47. Several middle mold tubes 46 are arranged between the two end mold tubes 45. Both the middle mold tubes 46 and the end mold tubes 45 are mounted on the connecting shaft 47. The cooling tube 5 is installed on the connecting shaft 47. A solenoid valve is connected to the air inlet hose 7. Cooling chambers 6 are formed in both the end mold tubes 45 and the middle mold tubes 46. Each cooling chamber 6 is equipped with an exhaust port 48. The exhaust port 48 and the air inlet hose 7 are respectively arranged at both ends of the cooling chamber 6. The two end mold tubes 45 and the multiple middle mold tubes 46 are connected in series by the connecting shaft 47. The multiple middle mold tubes 46 are tightly pressed together by the two end mold tubes 45. The length of the winding mold tube 1 can be controlled by the number of middle mold tubes 46 that are disassembled and assembled, thereby adapting to the production of carat tubes of different lengths.

[0033] Furthermore, the middle mold tube 46 includes two half-mold tubes, each with a cooling groove on its opposite end face. The two half-mold tubes are connected together by screws to form a cooling cavity 6. The end mold tube 45 has the same structure as the middle mold tube 46. To facilitate the formation of the cooling cavity 6, the middle mold tube 46 and the end mold tube 45 are designed as separate structures, which facilitates the processing of the cooling cavity 6. The mounting surfaces of the two half-mold tubes are sealed by a sealing ring, which can form a cooling cavity 6 with good sealing performance. This allows multiple independent cooling cavities 6 to be formed within the winding mold tube 1, enabling localized initial cooling of the wound strip. This allows heating and cooling to occur simultaneously in different areas, avoiding mutual interference and ensuring the continuity of the winding process of the corrugated tube.

[0034] Example 3

[0035] Based on Example 2, such as Figures 1 to 7As shown, the central mold tube 46 includes a lower arc-shaped mold plate 52, an upper arc-shaped mold plate 53, and a central arc-shaped mold plate 54. A shaft 55 is fixed to one end of the central arc-shaped mold plate 54, and the shaft 55 is rotatably connected to one end of the lower arc-shaped mold plate 52, allowing the central arc-shaped mold plate 54 to deflect towards the center of the lower arc-shaped mold plate 52. A shaft 56 is fixed to the end of the upper arc-shaped mold plate 53 away from the central arc-shaped mold plate 54, and the shaft 56 is rotatably connected to the other end of the lower arc-shaped mold plate 52. Similarly, the upper arc-shaped mold plate 53 can deflect towards the center of the lower arc-shaped mold plate 52 through the deflection of the shaft 56. The other end of the central arc-shaped mold plate 54 can contact the other end of the upper arc-shaped mold plate 53 to form the central mold tube 46. A U-shaped linkage 57 is provided between plate 54 and upper arc-shaped mold plate 53. The two ends of the U-shaped linkage 57 are rotatably connected to the inner wall of upper arc-shaped mold plate 53 and the inner wall of middle arc-shaped mold plate 54, respectively. A mold mounting ring 59 is connected to the inner wall of lower arc-shaped mold plate 52 through rib plate 58. The mold mounting ring 59 is coaxial with the middle mold tube 46 and is fitted onto the connecting shaft 47. A drive inner plate 60 is fixed to the inner wall of the middle arc-shaped mold plate 54. The drive inner plate 60 has a through hole. The structure of the end mold tube 45 is the same as that of the middle mold tube 46. The mold mounting ring 59 of the end mold tube 45 is fixed to the connecting shaft 47 by fastening bolts, thereby connecting the middle mold between the two end mold tubes 45. The tubes 46 are pressed together. The drive inner plate 60 of the end mold tube 45 is connected to the drive inner plate 60 of the middle mold tube 46 via a long shaft connecting rod 61. One of the end mold tubes 45 is equipped with a pull rod 62. One end of the pull rod 62 is hinged to the drive inner plate 60, and the other end is hinged to the axial slide 63. The axial slide 63 is threaded onto the demolding threaded tube 64. The demolding threaded tube 64 is rotatably sleeved on the connecting shaft 47. A lever 65 is fixed to the side wall of the demolding threaded tube 64. During assembly, one end mold tube 45 is sleeved onto the connecting shaft 47 and locked with fastening bolts. The long shaft connecting rod 61 is then passed through the through hole of the drive inner plate 60. Then, the middle mold tubes 46 are assembled in sequence, and the drive inner plate of the middle mold tube 46 is... 60 passes through the long shaft connecting rod 61, and finally installs the other end mold tube 45, so that the long shaft connecting rod 61 passes through the drive inner plate 60 of the end mold tube 45. Finally, a pull rod 62 is installed on one of the end mold tubes 45, and the middle arc mold plate 54 of the end mold tube 45 is supported by the pull rod 62, so that the middle arc mold plate 54 contacts the upper arc mold plate 53 to form a circular end mold tube 45. The middle arc mold plate 54 of the middle mold tube 46 contacts the upper arc mold plate 53 through the long shaft connecting rod 61, forming a circular middle mold tube 46. Thus, the middle mold tube 46 and the end mold tube 45 form a wound mold tube 1. Then, the cooling tube 5 is installed on the series shaft 47, and finally the air intake hose 7 is connected.After the winding die tube 1 completes the winding of the Krah tube, the Krah tube cools and solidifies before demolding. By pulling the lever 65, the demolding threaded tube 64 is rotated, causing the axial slide 63 to move axially along the series shaft 47. This causes the pull rod 62 to pull the middle arc mold plate 54 closer to the center of the lower arc mold plate 52. The middle arc mold plate 54, through the U-shaped linkage 57, causes the upper arc mold plate 53 to move closer to the center of the lower arc mold plate 52. This causes the upper arc mold plate 53 and the middle arc mold plate 54 to deflect inward to reduce the outer diameter of the winding die tube 1. Then, it presses against one end of the Krah tube, and the lifting equipment pulls the winding die tube 1 along its own axis, thus quickly and effectively completing the demolding of the Krah tube. Preferably, cooling chambers 6 are formed in the lower arc-shaped mold plate 52, the upper arc-shaped mold plate 53, and the middle arc-shaped mold plate 54. The air inlet hose 7 includes a main pipe and branch pipes. The main pipe is connected to the cooling pipe 5. Each cooling chamber 6 is connected to the main pipe through a branch pipe. A solenoid valve is installed on the main pipe. Opening the solenoid valve on the main pipe allows cold air to be introduced into the multiple cooling chambers 6 arranged in a ring. One end of the cooling pipe 5 is connected to a liquid nitrogen cylinder through a rotary joint, thereby allowing cold air to be introduced into the cooling chamber 6 to complete the initial cooling of the winding strip.

[0036] Example 4

[0037] Based on Example 3, such as Figures 1 to 6As shown, the molding plastic tube conveying mechanism includes a conveyor frame 9, a strip conveying roller 10, and a plastic tube conveying roller 11. Two sets of plastic tube conveying rollers 11 are rotatably mounted on the conveyor frame 9, and the plastic tube passes between the two sets of plastic tube conveying rollers 11. The strip conveying roller 10 is rotatably mounted on the conveyor frame 9, and the strip is conveyed above the plastic tube for winding the strip onto the winding mold tube 1 and the plastic tube onto the strip. The conveyor frame 9 is provided with a strip hot-melt assembly and a plastic tube hot-melt assembly. The strip hot-melt assembly includes a hot-melt seat 13, which is fixed on the conveyor frame 9. The hot-melt seat 13 is provided with a hot-melt channel 14 through which the strip passes, and an electric heating plate 15 is installed in the hot-melt channel 14. The plastic tube hot-melt assembly includes a hot-melt pipe 16 fixed on the conveyor frame 9. Several electric heating rings 17 are fitted along the axial direction of the hot-melt pipe 16. The strip to be wound and the plastic tube are wound on different unwinding frames, and the released strip... The material strip is conveyed to the hot melt seat 13 by the material conveyor roller 10 and passes through the hot melt channel 14. The material strip is heated to a hot melt state by the electric heating plate 15. Then, the end of the material strip is hot melted and adhered to the winding die tube 1. The automatic winding of the material strip can be completed by the rotation and feeding of the winding die tube 1. Similarly, the plastic tube released from the unwinding frame is conveyed to the hot melt channel 16 by the plastic tube conveyor roller 11. The plastic tube passes through the hot melt channel 16 and is heated to a hot melt state by the electric heating ring 17, so that the plastic tube can be fused to the material strip. The automatic winding is completed by the rotation and feeding of the winding die tube 1, thus completing the automatic winding production of the carat tube. Preheating the material strip and plastic tube to a hot melt state can avoid the influence of cold air, which can cause the temperature of the next area of ​​the winding die tube 1 to be unable to keep the material strip in a hot melt state, thus achieving good welding between material strips and between the material strip and the plastic tube.

[0038] Furthermore, the hot melt seat 13 includes an upper seat body 18 and a lower seat body 19. The lower seat body 19 is mounted on the conveyor frame 9 via a bracket. A lead screw 20 is rotatably connected to the lower seat body 19, and a guide rod 21 is fixed on the lower seat body 19. The upper seat body 18 has a threaded hole 22 and a guide hole 23. The lead screw 20 is threaded into the threaded hole 22, and the guide rod 21 is slidably fitted into the guide hole 23. One end of the lead screw 20 passes through the bottom of the lower seat body 19 and is connected to an adjusting nut 24. By turning the adjusting nut 24 with a wrench, the lead screw 20 is rotated. Through the cooperation of the guide rod 21 and the guide hole 23, the upper seat body 18 moves along the axial direction of the lead screw 20, thereby adjusting the distance between the upper seat body 18 and the lower seat body 19, and thus adjusting the distance of the hot melt channel 14 to accommodate material strips of different thicknesses.

[0039] Example 5

[0040] Based on Example 4, such as Figures 1 to 6As shown, the conveyor frame 9 is equipped with a strip extrusion mechanism and a plastic tube extrusion mechanism. The strip extrusion mechanism includes an extrusion bracket 25, an extrusion arm 26, an extrusion roller 27, and an extrusion cylinder 28. The extrusion bracket 25 is fixed on the conveyor frame 9. One end of the extrusion arm 26 is fixed with a deflection shaft 29. The axis of the deflection shaft 29 is parallel to the axis of the winding mold tube 1. The deflection shaft 29 is rotatably connected to the extrusion bracket 25. The extrusion roller 27 is rotatably mounted on the top of the extrusion arm 26. The cylinder body of the extrusion cylinder 28 is hinged. On the extrusion support 25, the telescopic shaft of the extrusion cylinder 28 is hinged to the extrusion arm 26. The plastic tube extrusion mechanism includes an extrusion base plate 30, a pad 31, an extrusion seat 32, a U-shaped lifting frame 33, and a plastic tube extrusion roller 34. The extrusion base plate 30 is fixed on the conveyor frame 9. The pad 31 is installed on the top surface of the extrusion base plate 30 by a first screw. The extrusion seat 32 is installed on the top surface of the pad 31 by a second screw. The U-shaped lifting frame 33 is installed on the extrusion seat 32. The U-shaped lifting frame 33 has a lateral extension along the extrusion arm 26. The seat 32 has a degree of freedom of movement in the height direction. The plastic tube extrusion roller 34 is rotatably mounted on the U-shaped lifting frame 33. The extrusion roller 27 is arranged close to the winding mold tube 1. The hot-melt strip is pushed onto the winding mold tube 1 by the extrusion roller 27. Initially, the extrusion cylinder 28 drives the extrusion arm 26 to deflect away from the winding mold tube 1, increasing the gap between the extrusion roller 27 and the winding mold tube 1. The strip is manually passed through this gap and hot-adhere to the winding mold tube 1. Then the extrusion cylinder 28 drives the extrusion roller 27 to return to its original position. Subsequently, the rotation of the winding mold tube 1 pulls the strip to continue winding, and the extrusion roller 27 makes the strip adhere well to the winding mold tube 1. Similarly, the U-shaped lifting frame 33 moves downward to increase the distance between the plastic tube extrusion roller 34 and the winding mold tube 1. One end of the plastic tube is hot-adhere to the winding strip. Then the U-shaped lifting frame 33 drives the plastic tube extrusion roller 34 to return to its original position, and the hot-melt plastic tube is well fused to the strip, improving the production quality of the carat tube.

[0041] Example 6

[0042] Based on Example 5, such as Figures 1 to 8As shown, the extrusion seat 32 has a drive cavity 35, and a lower wedge block 36 is slidably disposed in the drive cavity 35. An upper wedge block 37 is slidably fitted on the top surface of the lower wedge block 36. The mating surface between the upper wedge block 37 and the lower wedge block 36 is an inclined surface. A guide window communicating with the drive cavity 35 is opened on the top surface of the extrusion seat 32. A guide post 38 is fixed on the top of the upper wedge block 37. The guide post 38 passes through the guide window and connects to the U-shaped lifting frame 33. A plastic tube extrusion cylinder 39 is horizontally installed on the extrusion seat 32. The plastic tube extrusion cylinder... The telescopic shaft of cylinder 39 moves into the drive cavity 35 and connects to the lower wedge block 36. The plastic tube extrusion cylinder 39 drives the lower wedge block 36 to move. The lower wedge block 36 engages with the inclined surface of the upper wedge block 37, and under the limiting action of the guide post 38, the upper wedge block 37 can move up and down within a small range, thereby driving the U-shaped lifting frame 33 to move up and down. This provides high adjustment precision, allowing for adjustment of the gap between the plastic tube extrusion roller 34 and the winding mold tube 1 within a small range, completing the initial welding of the hot-melt plastic tube. By installing pads 31 of different thicknesses, the initial height of the plastic tube extrusion roller 34 can be adjusted to accommodate winding mold tubes 1 of different sizes.

[0043] Example 7

[0044] Based on Example 6, such as Figures 1 to 6 As shown, a U-shaped seat 40 is fixed to the bottom of the extrusion arm 26. The opening of the U-shaped seat 40 faces downward. A deflection arm 41 is arranged inside the opening of the U-shaped seat 40. A rotating shaft is fixed to one end of the deflection arm 41, and a hot air plate 42 is fixed to the other end. The rotating shaft is rotatably connected to the U-shaped seat 40. A hot air cavity is formed inside the hot air plate 42. Several hot air holes 43 are opened at the end of the hot air plate 42 away from the deflection arm 41. The hot air holes 43 are connected to the hot air cavity. The hot air blown out of the hot air holes 43 acts on the gap between the plastic tube extrusion roller 34 and the winding mold tube 1. The 40 threaded connection has a fastening screw 44, which abuts against the deflection arm 41. The hot air plate 42 is connected to the hot air blower through a metal hose. The hot air blows out through the hot air hole 43. By adjusting the angle of the deflection arm 41, the blowing direction is controlled so that the hot air is accurately blown onto the upper end face of the plastic tube on the plastic tube extrusion roller 34. The upper end face of the plastic tube is fused to the material belt. Through the action of the hot air, the upper end face of the plastic tube is kept in a hot-melt state, avoiding the problem of poor welding quality caused by excessive temperature drop during the conveying process.

Claims

1. An automatic plastic pipe winding machine, characterized in that, The device includes a mold driving mechanism, a winding mold tube, a forming plastic tube conveying mechanism, and a vision imaging mechanism. The mold driving mechanism includes a base, a sliding base plate, and roller frames. The sliding base plate is slidably mounted on the base, and multiple sets of roller frames are spaced apart on the sliding base plate. The winding mold tube is placed on the roller frames, and a cooling tube is fixedly installed inside the winding mold tube. Several independent cooling chambers are formed along the axial direction between the inner and outer walls of the winding mold tube. Each cooling chamber is equipped with an air inlet hose, and the two ends of the air inlet hose are respectively connected to the cooling tube and the inner wall of the winding mold tube. A heating mechanism is provided on the outside of the winding mold tube, and the heating mechanism includes a flame gun installed facing the winding mold tube. The forming plastic tube conveying mechanism is used to convey the material strip onto the winding mold tube and complete the winding by rotating the winding mold tube. At the same time, the forming plastic tube conveying mechanism conveys the plastic tube onto the winding material strip. The vision imaging mechanism includes an industrial camera arranged on the outside of the winding mold tube, and the industrial camera is used to image the position of the material strip after cooling.

2. The automatic plastic pipe winding machine according to claim 1, characterized in that, The molding plastic tube conveying mechanism includes a conveying frame, a material belt conveying roller, and a plastic tube conveying roller. Two sets of plastic tube conveying rollers are rotatably mounted on the conveying frame, and the plastic tube passes between the two sets of plastic tube conveying rollers. The material belt conveying roller is rotatably mounted on the conveying frame, and the material belt is conveyed above the plastic tube to make the material belt wrap around the winding mold tube and the plastic tube wrap around the material belt.

3. The automatic plastic pipe winding machine according to claim 2, characterized in that, The conveyor frame is equipped with a material belt hot-melt assembly and a plastic tube hot-melt assembly. The material belt hot-melt assembly includes a hot-melt base, which is fixed on the conveyor frame. The hot-melt base has a hot-melt channel through which the material belt passes, and an electric heating plate is installed in the hot-melt channel. The plastic tube hot-melt assembly includes a hot-melt pipe fixed on the conveyor frame, and several electric heating rings are fitted on the hot-melt pipe along its own axial direction.

4. The automatic plastic pipe winding machine according to claim 3, characterized in that, The hot melt seat includes an upper seat body and a lower seat body. The lower seat body is mounted on a conveyor frame via a bracket. A lead screw is rotatably connected to the lower seat body, and a guide rod is fixed to the lower seat body. The upper seat body has a threaded hole and a guide hole. The lead screw is threaded into the threaded hole, and the guide rod is slidably adapted to the guide hole. One end of the lead screw passes through the bottom of the lower seat body and is connected to an adjusting nut.

5. The automatic plastic pipe winding machine according to claim 2, characterized in that, The conveyor frame is equipped with a strip extrusion mechanism and a plastic tube extrusion mechanism. The strip extrusion mechanism includes an extrusion bracket, an extrusion arm, an extrusion roller, and an extrusion cylinder. The extrusion bracket is fixed on the conveyor frame. One end of the extrusion arm is fixed with a deflection shaft. The axis of the deflection shaft is parallel to the axis of the winding mold tube and is rotatably connected to the extrusion bracket. The extrusion roller is rotatably mounted on the top of the extrusion arm. The cylinder body of the extrusion cylinder is hinged to the extrusion bracket, and the telescopic shaft of the extrusion cylinder is hinged to the extrusion arm. The plastic tube extrusion mechanism includes an extrusion base plate, a pad, an extrusion seat, a U-shaped lifting frame, and a plastic tube extrusion roller. The extrusion base plate is fixed on the conveyor frame. The pad is mounted on the top surface of the extrusion base plate by a first screw. The extrusion seat is mounted on the top surface of the pad by a second screw. The U-shaped lifting frame is mounted on the extrusion seat and has a degree of freedom to move along the height direction of the extrusion seat. The plastic tube extrusion roller is rotatably mounted on the U-shaped lifting frame.

6. The automatic plastic pipe winding machine according to claim 5, characterized in that, The extrusion seat is provided with a drive cavity, and a lower wedge block is slidably disposed in the drive cavity. An upper wedge block is slidably fitted on the top surface of the lower wedge block. The mating surface between the upper and lower wedge blocks is an inclined surface. A guide window communicating with the drive cavity is opened on the top surface of the extrusion seat. A guide post is fixed on the top of the upper wedge block. The guide post passes through the guide window and connects to a U-shaped lifting frame. A plastic tube extrusion cylinder is horizontally installed on the extrusion seat. The telescopic shaft of the plastic tube extrusion cylinder is movably inserted into the drive cavity and connected to the lower wedge block.

7. The automatic plastic pipe winding machine according to claim 5, characterized in that, A U-shaped seat is fixed to the bottom of the extrusion arm, with the opening of the U-shaped seat facing downwards. A deflection arm is provided inside the opening of the U-shaped seat. A rotating shaft is fixed to one end of the deflection arm, and a hot air plate is fixed to the other end. The rotating shaft is rotatably connected to the U-shaped seat. A hot air cavity is formed inside the hot air plate. Several hot air holes are opened at the end of the hot air plate away from the deflection arm. The hot air holes are connected to the hot air cavity. The hot air blown out of the hot air holes acts on the gap between the plastic tube extrusion roller and the winding mold tube. A fastening screw is threadedly connected to the U-shaped seat, and the fastening screw abuts against the deflection arm.

8. The automatic plastic pipe winding machine according to claim 1, characterized in that, The winding mold tube includes an end mold tube, a middle mold tube, and a series shaft. Several middle mold tubes are arranged between two end mold tubes. Both the middle mold tubes and the end mold tubes are mounted on the series shaft. The cooling tube is installed on the series shaft. A solenoid valve is connected to the air inlet hose. Cooling chambers are formed inside both the end mold tubes and the middle mold tubes. Each cooling chamber is equipped with an exhaust port. The exhaust port and the air inlet hose are respectively arranged at both ends of the cooling chamber.

9. An automatic plastic pipe winding machine according to claim 8, characterized in that, The middle mold tube includes two half mold tubes, and cooling grooves are provided on the opposite end faces of the two half mold tubes. The two half mold tubes are connected together by screws to form a cooling cavity with the two cooling grooves. The structure of the end mold tube is the same as that of the middle mold tube.

10. An automatic plastic pipe winding machine according to claim 1, characterized in that, The top surface of the base is provided with a lead screw groove, in which a drive lead screw is rotatably installed. A lead screw nut is threaded onto the drive lead screw, and the sliding base plate is fixedly installed on the lead screw nut. A lead screw motor is installed at one end of the base, and the output shaft of the lead screw motor is connected to the drive lead screw.

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