Processing equipment

Abstract

The present invention discloses a processing equipment, which includes a tube-releasing structure, a heating structure, an expansion die, a traction device and a tube-collecting structure. The tube-releasing structure is provided with a tube-releasing roller. The heating structure includes a retraction mechanism and a heating furnace provided on the retraction mechanism. The heating furnace is provided with a heating chamber and an inlet connected to the heating chamber. The retraction mechanism is provided with a retraction chamber and an outlet connected to the retraction chamber. The heating chamber is connected to the retraction chamber. The expansion die is provided at the outlet for expanding the heat shrinkable tube. The traction device is provided with a traction channel arranged opposite to the expansion die. The tube-collecting structure is arranged adjacent to the traction device, and the tube-collecting structure is provided with a tube-collecting roller. The present invention aims to provide a processing equipment capable of eliminating or reducing the defect of unstable axial elongation rate of heat shrinkable tubes. The processing equipment can effectively control the elongation rate of heat shrinkable tubes, thereby improving the quality of finished products of heat shrinkable tubes.

Description

Technical Field

[0001] The invention relates to the technical field of heat shrink tube processing equipment, and in particular to a processing equipment. Background Art

[0002] The axial elongation rate of heat shrink tubing is one of the important indicators to measure its quality. With the continuous improvement of the degree of automation in various industries, the downstream factories in the industrial chain gradually adopt automated equipment to replace the transmission process in the process of using heat shrink tubing. The development and application of automated equipment have gradually increased the requirements for the quality and consistency of heat shrink tubing. Heat shrink tubing with unstable axial elongation rate will seriously affect the operating stability of subsequent automated equipment and will inevitably be eliminated by the market.

[0003] In the related art, the production line of the heat shrink tube dry expander is generally composed of three parts: a tube unwinding device, a tube collecting device, and an expander main unit. During the processing of heat shrink tubes, they need to go through the main processes of masterbatch, extrusion, irradiation, expansion, and packaging. During the expansion process, the elongation rate of the heat shrink tube changes dynamically, and the elongation rate cannot be effectively controlled. At the same time, after the heat shrink tube has been repeatedly turned over and circulated through a series of processes before expansion, the original tube will continue to accumulate the defect of uneven axial elongation rate. Conventional heating methods cannot eliminate the defect of unstable axial elongation rate during expansion. These defects will cause the axial elongation rate of the finished heat shrink tube after expansion to be unstable, resulting in product quality problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a processing equipment, aiming to provide a processing equipment that can eliminate or reduce the defect of unstable axial stretch rate of the heat shrinkable tube. The processing equipment can effectively control the stretch rate of the heat shrinkable tube and improve the quality of the finished product of the heat shrinkable tube.

[0005] To achieve the above-mentioned purpose, the processing equipment proposed in the present invention is used for heat shrink tube expansion processing, and the processing equipment comprises:

[0006] A tube unwinding structure, wherein the tube unwinding structure is provided with a tube unwinding roller, and the tube unwinding roller is used to unwind the heat shrink tube;

[0007] A heating structure, the heating structure is arranged adjacent to the tube placing structure, the heating structure comprises a retracting mechanism and a heating furnace arranged on the retracting mechanism, the heating furnace is provided with a heating chamber and an inlet communicating with the heating chamber, the retracting mechanism is provided with a retracting chamber and an outlet communicating with the retracting chamber, the heating chamber is communicated with the retracting chamber, and the heating chamber and the retracting chamber are used to heat the heat shrinkable tube;

[0008] An expansion mold, which is arranged at the outlet and is used for expanding the heat shrink tube;

[0009] A traction device, the traction device is arranged adjacent to the expansion mold, and the traction device is provided with a traction channel arranged opposite to the expansion mold; and

[0010] The tube collecting structure is arranged adjacent to the traction device, and the tube collecting structure is provided with a tube collecting roller, and the tube collecting roller is used to collect the heat shrink tube passing through the traction channel.

[0011] In one embodiment, the retraction mechanism comprises:

[0012] A retraction box, wherein the retraction box is provided with the retraction chamber and an inlet and an outlet communicating with the retraction chamber, the heating furnace is arranged at the inlet, and the heating chamber is communicated with the retraction chamber through the inlet;

[0013] A heating component, the heating component is arranged on the inner wall of the retraction cavity and is arranged corresponding to the inlet and the outlet; and

[0014] A conveying assembly, the conveying assembly includes a first driving member, a driving shaft, a driven shaft and a conveyor belt, the driving shaft is arranged in the retraction chamber, the first driving member is arranged in the retraction box, and passes through the retraction box and is transmission-connected with the driving shaft, the driven shaft is arranged in the retraction chamber, and is parallel to and spaced from the driving shaft, and the conveyor belt is sleeved on the driving shaft and the driven shaft.

[0015] In one embodiment, the retraction mechanism further includes a temperature sensor disposed in the retraction box, one end of the temperature sensor passes through the retraction box and extends into the retraction cavity, for detecting the temperature in the retraction cavity;

[0016] And / or, the retraction mechanism further includes a curvature detector, the curvature detector includes an emitter and a receiver disposed on opposite sides of the retraction box, the receiver being disposed corresponding to the emitter and used to detect the curvature of the heat shrink tube in the retraction cavity;

[0017] And / or, the retraction mechanism further comprises two guide assemblies arranged in the retraction chamber, one of the guide assemblies is arranged adjacent to the inlet, and the other of the guide assemblies is arranged adjacent to the outlet, the driving shaft and the driven shaft are located between the two guide assemblies, each of the guide assemblies comprises a connecting plate and a guide wheel, one end of the connecting plate is connected to the inner wall of the retraction chamber, the guide wheel is rotatably connected to the other end of the connecting plate, the guide wheel is provided with a guide groove, and the guide groove is used to accommodate the heat shrink tube;

[0018] And / or, the heating furnace includes a furnace body and a conveying wheel, the furnace body is arranged at the inlet, the furnace body is provided with the heating chamber and the inlet, the inlet is located at the end of the furnace body away from the inlet, the conveying wheel is arranged at the inlet, the conveying wheel includes two conveying rollers arranged opposite to each other, a conveying channel is formed between the two conveying rollers, the conveying channel is opposite to and connected to the inlet, and is used to convey the heat shrink tube of the tube release roller into the inlet.

[0019] In one embodiment, the traction device comprises:

[0020] matrix;

[0021] a second driving member, the second driving member being disposed on the base;

[0022] a traction structure, the traction structure being arranged on the base and drivingly connected to the second driving member, the traction structure being provided with the traction channel; and

[0023] An auxiliary traction component is arranged on the base and is drivingly connected to the second driving member. The auxiliary traction component is provided with an auxiliary traction channel for traction of the heat shrink tube, and the auxiliary traction channel is spaced apart and arranged in parallel with the traction channel.

[0024] In one embodiment, the traction structure comprises:

[0025] A mounting seat, the mounting seat being arranged on the base;

[0026] Two crawler assemblies, the two crawler assemblies are arranged in parallel and at intervals on the mounting seat, one end of the two crawler assemblies is provided with a crawler, the other end of the two crawler assemblies is provided with a first gear, the two first gears are meshed and connected, one end of the crawler assembly away from the crawler is provided with a first pulley, the first pulley is arranged at an interval from the first gear, and is transmission-connected to the second driving member through a transmission belt, the two crawlers are arranged opposite to each other, and cooperate to form the traction channel; and

[0027] The first protective cover is provided with a first cavity and a first notch communicating with the first cavity, the crawler belt is accommodated in the first cavity and partially exposed in the first notch, and the traction channel is correspondingly communicated with the first notch.

[0028] In one embodiment, the mounting seat comprises a first mounting seat fixedly mounted on the base and a second mounting seat movably mounted on the base, the first mounting seat and the second mounting seat are provided with coaxially arranged mounting holes, one of the track assemblies is passed through the first mounting seat, and the other of the track assemblies is passed through the second mounting seat;

[0029] The traction structure further includes an adjustment component, and the adjustment component includes:

[0030] An adjusting member, the adjusting member comprising an adjusting rod and a hand wheel provided at one end of the adjusting rod, the adjusting rod being rotatably passed through the two mounting holes; and

[0031] A return spring, wherein the return spring is sleeved on the adjusting rod, and two ends of the return spring are elastically abutted against the first mounting seat and the second mounting seat respectively;

[0032] The hand wheel drives the adjusting rod to rotate so that the second mounting seat is moved closer to or away from the first mounting seat.

[0033] In one embodiment, the auxiliary traction assembly comprises:

[0034] A fixing seat, the fixing seat being arranged on the base;

[0035] Two auxiliary shafts, the two auxiliary shafts are arranged in parallel and at intervals through the fixing seat, one end of the two auxiliary shafts is provided with an auxiliary traction wheel, the other end of the two auxiliary shafts is provided with a second gear, the two second gears are meshed and connected, one end of the auxiliary shaft away from the auxiliary traction wheel is provided with a second pulley, the second pulley is arranged at intervals from the second gear, and is transmission-connected to the second driving member through a transmission belt, the two auxiliary traction wheels are arranged opposite to each other, and cooperate to form the auxiliary traction channel; and

[0036] The second protective cover is provided with a second cavity and a second notch communicating with the second cavity, the two auxiliary traction wheels are accommodated in the second cavity and partially exposed in the second notch, and the auxiliary traction channel is correspondingly communicated with the second notch.

[0037] In one embodiment, the traction device further comprises a limiting assembly, the limiting assembly comprises a fixing plate and two limiting rods, the fixing plate is arranged on the base and is located between the traction structure and the auxiliary traction assembly, the two limiting rods are arranged at one end of the fixing plate away from the base, the two limiting rods are arranged in parallel and at intervals, and cooperate to form a limiting groove, and the limiting groove is located on the same straight line as one end of the traction channel and the auxiliary traction channel;

[0038] And / or, the traction device also includes a tensioning assembly located between the second driving member and the traction structure and / or the auxiliary traction assembly, the tensioning assembly includes a limit plate, a roller shaft and a screw, the limit plate is arranged on the base, the limit plate is provided with a strip hole, one end of the roller shaft is provided with a roller, the other end of the roller shaft is passed through the strip hole and is provided with a screw hole, one end of the screw passes through the base and the limit plate, extends into the strip hole, and is passed through the screw hole.

[0039] In one embodiment, the tube-releasing structure includes a first base, a first driving assembly and a first tension assembly, the first base is provided with a receiving cavity, the first driving assembly includes a first driving motor provided on the first base and two first transmission rollers connected to the first driving motor by transmission, the two first transmission rollers are arranged in the receiving cavity at intervals and cooperate to form a first transmission groove, the tube-releasing roller is placed in the first transmission groove, the first tension assembly includes a first bracket and a first guide wheel provided on the first base, the first bracket is provided with a first detection groove, the first guide wheel is provided on the first bracket and is arranged corresponding to the first detection groove, the heat shrink tube of the tube-releasing roller passes through the first detection groove and abuts against the first guide wheel;

[0040] And / or, the tube collecting structure includes a second base, a second drive assembly, a second tension assembly and a wire arranging assembly, the second base is provided with a accommodating cavity, the second drive assembly includes a second drive motor arranged on the second base and two second transmission rollers connected to the second drive motor in transmission, the two second transmission rollers are rotatably arranged in the accommodating cavity and cooperate to form a second transmission groove, the tube collecting roller is placed in the second transmission groove, the second tension assembly includes a second bracket and a second guide wheel arranged on the second base, the second bracket is provided with a second detection groove, the second guide wheel is arranged on the second bracket and corresponding to the second detection groove, the wire arranging assembly is arranged on the second base, the wire arranging assembly is provided with a wire arranging wheel located between the tube collecting roller and the second detection groove, the heat shrink tube passes through the second guide wheel, the second detection groove and the wire arranging wheel in sequence, and is wound on the tube collecting roller.

[0041] In one embodiment, the processing equipment further comprises a caliper, the caliper is arranged between the expansion die and the traction channel, and the caliper is used to detect the diameter of the heat shrink tube passing through the expansion die;

[0042] And / or, the processing equipment further includes a speed meter, which is disposed between the outlet and the expansion mold, and is used to detect a conveying speed of the heat shrink tube at the outlet.

[0043] The processing equipment of the technical solution of the present invention arranges the heating structure between the tube-releasing roller of the tube-releasing structure and the expansion mold, and connects the heating chamber of the heating furnace in the heating structure with the retraction chamber of the retraction structure, so as to realize secondary heating of the heat shrinkable tube on the tube-releasing roller before entering the expansion mold, which can eliminate or reduce the defect of unstable axial elongation rate of the heat shrinkable tube and improve the quality of the finished product of the heat shrinkable tube; at the same time, by arranging the traction device and the tube-collecting structure, the traction channel of the traction device is arranged opposite to the expansion mold, so as to use the traction device to stably clamp and traction the expanded heat shrinkable tube, avoid the expansion instability caused by the clamping force being too loose and slipping or too tight and hindering the gas flow in the tube, and then cause the machine to freeze, so that the heat shrinkable tube can be smoothly collected in the tube-collecting roller of the tube-collecting structure, and the expansion processing of the heat shrinkable tube is completed. The processing equipment of the present invention can not only eliminate or reduce the defect of unstable axial elongation rate of the heat shrinkable tube, but also effectively control the elongation rate of the heat shrinkable tube, thereby improving the quality of the finished product of the heat shrinkable tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0045] Figure 1 It is a structural schematic diagram of a processing device in one embodiment of the present invention;

[0046] Figure 2 It is a schematic diagram of a partially exploded structure of a tube-releasing structure in one embodiment of the present invention;

[0047] Figure 3 It is a structural schematic diagram of a heating structure in one embodiment of the present invention;

[0048] Figure 4 It is a partial cross-sectional schematic diagram of a retracting mechanism in one embodiment of the present invention;

[0049] Figure 5 It is a structural schematic diagram of a traction device in one embodiment of the present invention;

[0050] Figure 6 It is a structural schematic diagram of a traction structure in one embodiment of the present invention;

[0051] Figure 7 Schematic diagram of the structure of the tube collection structure in one embodiment of the present invention.

[0052] Description of Figure Numbers:

[0053]

[0054] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0058] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] The axial elongation rate of heat shrink tubing is one of the important indicators to measure its quality. With the continuous improvement of the degree of automation in various industries, the downstream factories in the industrial chain gradually adopt automated equipment to replace the transmission process in the process of using heat shrink tubing. The development and application of automated equipment have gradually increased the requirements for the quality and consistency of heat shrink tubing. Heat shrink tubing with unstable axial elongation rate will seriously affect the operating stability of subsequent automated equipment and will inevitably be eliminated by the market.

[0060] In the related art, the production line of the heat shrink tube dry expander is generally composed of three parts: a tube placing device, a tube collecting device, and an expander main unit. The expansion main unit is generally composed of a conveying device, a heating device, an expansion mold, and a traction device, which are arranged from top to bottom. The tube placing device is generally a disc rack or a material frame. The heat shrink tube to be expanded is passively rotated out of the disc rack or passively pulled out of the material frame, and its power is provided by the conveying device of the expansion main unit; the tube collecting device generally uses a square or barrel-shaped material frame, which is directly placed under the traction device of the expansion main unit to freely accept the finished heat shrink tube. In this process, the stretching rate of the heat shrink tube changes dynamically during the expansion process, and the stretching rate cannot be effectively controlled.

[0061] If the tube unwinding device adopts a reel rack, the deformation of the storage reel itself or the number of stored tubes will cause the center of gravity of the storage reel to be eccentric and the balance to be unstable, resulting in uneven rotation speed of the heat shrink tube unwinding reel, unstable tension of the heat shrink tube, and slippage of the tube delivery. This will cause the heat shrink tube to have different degrees of axial stretching during the tube unwinding stage, thereby affecting the expansion and causing uncontrollable axial stretching changes in the finished product after expansion. If the tube is unwinded from the material frame, it is very easy for the tube to be tangled. If it cannot be handled manually in time, it will cause a crash. At the same time, unwinding the tube from the frame is also very likely to cause radial distortion of the tube.

[0062] The tube collection device generally uses a material frame to connect the tube, and the heat shrink tube falls freely into the material frame, and is stacked and accumulated in a circle in the material frame. When the heat shrink tube expands, it is a deformation process that changes the heat shrink tube from a small diameter to a large diameter. When the diameter of the heat shrink tube increases, the volume will increase. This process requires continuous filling of compressed gas into the inner cavity of the heat shrink tube, and the compressed gas is filled from the end side of the expanded product. Since the heat shrink tube is freely stacked in the frame, the shape and position of the circle are uncontrollable, and it will occasionally bend. When there are many stacks in the frame, the heat shrink tube at the bottom will also be squeezed and deformed. When a bend occurs, the filling of compressed gas is blocked, which will cause a crash; when the heat shrink tube is compressed and deformed, it will affect the filling of compressed gas, which will lead to insufficient expansion. The axial stretching of the heat shrink tube will also change. As the deformation reaches a certain degree, it will also cause a crash. Using a material frame to store materials will cause the next packaging process to easily cause problems such as tube tangling and crashes, which is not conducive to packaging automation.

[0063] The heat shrink tube is sent from top to bottom by the conveying device to the heating device for heating, then enters the mold for expansion, and is subsequently pulled out of the mold by the traction device at the bottom. This process requires the conveying device and the traction device to match an optimal constant linear speed, and the heat shrink tube can expand stably only when it enters the mold mouth vertically. However, in this process, there are many unstable factors such as the vacuum pressure fluctuation of the mold, the internal pressure fluctuation of the heat shrink tube, the slight difference in the wall thickness of the tube, the uniformity of the microstructure of the heat shrink tube material, the axial stretching changes caused by the previous process, and the shaking of the heat shrink tube caused by heat convection in the heating device. Affected by these uncertain factors, the axial stretch rate of the heat shrink tube has been in dynamic fluctuations. Among these uncertain factors, the vacuum pressure fluctuation of the mold, the internal pressure fluctuation of the heat shrink tube, and the axial stretching changes caused by the previous process are most likely to cause the axial stretch of the expanded finished product to exceed the standard. When the heat shrink tube expands downward, the inlet of the expansion mold is at the top, and the heat shrink tube is blocked from entering the mold. Before entering the mold, the heat shrink tube is in a highly elastic state. Here, when affected by the above-mentioned unstable factors, the heat shrink tube is very likely to stretch or bend. When the two exceed a certain degree, the stretching will exceed the standard and fail. When the bending accumulates further, it will cause tube accumulation and then crash.

[0064] It can be seen that during the expansion process, the stretching rate of the heat shrink tube changes dynamically and cannot be effectively controlled. At the same time, after the heat shrink tube has been repeatedly turned over and circulated through a series of processes before expansion, the original tube will continue to accumulate defects of uneven axial stretching rate. Conventional heating methods during expansion cannot eliminate the defects of unstable axial stretching rate. These defects will cause the axial stretching rate of the finished heat shrink tube after expansion to be unstable, resulting in product quality problems.

[0065] Based on the above concepts and problems, the present invention proposes a processing device 100. It can be understood that the processing device 100 is used for the expansion processing of the heat shrinkable tube 8.

[0066] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in the embodiment of the present invention, the processing equipment 100 includes a tube-releasing structure 1, a heating structure 2, an expansion mold 3, a traction device 4 and a tube-receiving structure 5, wherein the tube-releasing structure 1 is provided with a tube-releasing roller 11, and the tube-releasing roller 11 is used to unwind the heat shrink tube 8; the heating structure 2 is arranged adjacent to the tube-releasing structure 1, and the heating structure 2 includes a retraction mechanism 21 and a heating furnace 22 arranged in the retraction mechanism 21, the heating furnace 22 is provided with a heating chamber 2211 and an inlet 2212 connected to the heating chamber 2211, and the retraction mechanism 21 is provided with a retraction chamber 2111 and an inlet 2212 connected to the heating chamber 2211. The outlet 2112 of the retraction chamber 2111 and the heating chamber 2211 are connected to the retraction chamber 2111, and the heating chamber 2211 and the retraction chamber 2111 are used to heat the heat shrinkable tube 8; the expansion mold 3 is arranged at the outlet 2112, and is used to expand the heat shrinkable tube 8; the traction device 4 is arranged adjacent to the expansion mold 3, and the traction device 4 is provided with a traction channel 432a arranged opposite to the expansion mold 3; the tube receiving structure 5 is arranged adjacent to the traction device 4, and the tube receiving structure 5 is provided with a tube receiving roller 51, and the tube receiving roller 51 is used to receive the heat shrinkable tube 8 passing through the traction channel 432a.

[0067] In this embodiment, the tube unwinding roller 11 of the tube unwinding structure 1 is used to unwind the heat shrinkable tube 8 to be processed, and the tube unwinding roller 11 can be a structure such as a wire drum, which is not limited here. The heating structure 2 is used to heat, shrink and shape the heat shrinkable tube 8 to be processed on the tube unwinding roller 11, that is, the heat shrinkable tube 8 of the tube unwinding roller 11 enters the heating chamber 2211 through the inlet 2212 of the heating furnace 22 for pre-heating, and then enters the retraction chamber 2111 for secondary heating, shrinkage and shaping, enters the expansion mold 3 through the outlet 2112 for expansion molding and shaping, and then pulls the expanded heat shrinkable tube 8 through the traction channel 432a of the traction device 4, and then is stored in the tube collecting roller 51 of the tube collecting structure 5. Optionally, the tube collecting roller 51 can be a structure such as a wire drum, which is not limited here.

[0068] The processing equipment 100 of the present invention arranges the heating structure 2 between the tube-releasing roller 11 of the tube-releasing structure 1 and the expansion mold 3, and connects the heating chamber 2211 of the heating furnace 22 in the heating structure 2 with the retraction chamber 2111 of the retraction structure 21, so as to realize secondary heating of the heat shrinkable tube 8 on the tube-releasing roller 11 before entering the expansion mold 3, thereby eliminating or reducing the defect of unstable axial elongation rate of the heat shrinkable tube 8 and improving the finished product quality of the heat shrinkable tube 8; at the same time, by arranging the traction device 4 and the tube collecting structure 5, the traction channel 432a of the traction device 4 is arranged opposite to the expansion mold 3, so that the traction device 4 is used to stably clamp the expanded heat shrinkable tube 8 and pull it out, avoiding the expansion instability caused by the clamping force being too loose and slipping or too tight and hindering the gas flow in the tube, thereby causing a freeze, so that the heat shrinkable tube 8 is smoothly received in the tube collecting roller 51 of the tube collecting structure 5, and the expansion processing of the heat shrinkable tube 8 is completed. The processing equipment 100 of the present invention can not only eliminate or reduce the defect of unstable axial elongation rate of the heat shrinkable tube 8, but also effectively control the elongation rate of the heat shrinkable tube 8, thereby improving the quality of the finished product of the heat shrinkable tube 8.

[0069] In one embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, the retraction mechanism 21 includes a retraction box 211, a heating component 212 and a conveying component 213, wherein the retraction box 211 is provided with a retraction chamber 2111 and an inlet 2113 and an outlet 2112 communicating with the retraction chamber 2111, the heating furnace 22 is provided at the inlet 2113, and the heating chamber 2211 is communicated with the retraction chamber 2111 through the inlet 2113; the heating component 212 is provided on the inner wall of the retraction chamber 2111, and is provided corresponding to the inlet 2113 and the outlet 2112; The delivery component 213 includes a first driving member 2131, a driving shaft 2132, a driven shaft 2133 and a conveyor belt 2134. The driving shaft 2132 is arranged in the retraction chamber 2111. The first driving member 2131 is arranged in the retraction box 211, and passes through the retraction box 211 and is transmission-connected with the driving shaft 2132. The driven shaft 2133 is arranged in the retraction chamber 2111, and is parallel to and spaced from the driving shaft 2132. The conveyor belt 2134 is sleeved on the driving shaft 2132 and the driven shaft 2133.

[0070] In this embodiment, the retraction box 211 of the retraction mechanism 21 is used to install, fix and support components such as the heating furnace 22, the expansion mold 3 and the conveying assembly 213. The structure of the retraction box 211 can be a box body, shell or box body structure with a cavity, which is not limited here.

[0071] It can be understood that the retraction box 211 has a retraction chamber 2111, and the retraction chamber 2111 is used to perform secondary heating and retraction shaping on the heat shrinkable tube 8 heated by the heating furnace 22. In order to facilitate the heat shrinkable tube 8 of the heating furnace 22 to enter the retraction chamber 2111, the retraction box 211 is provided with an inlet 2113 connected to the retraction chamber 2111, and the heating furnace 22 is arranged in the retraction box 211 and is arranged corresponding to the inlet 2113. In order to facilitate the heat shrinkable tube 8 in the retraction chamber 2111 that has been heated and retracted and shaped to expand and shape through the expansion mold 3, the retraction box 211 is provided with an outlet 2112 connected to the retraction chamber 2111, and the expansion mold 3 is arranged corresponding to the outlet 2112.

[0072] In this embodiment, the heating furnace 22 is provided with a heating chamber 2211, and the heating chamber 2211 is connected to the retracting chamber 2111 through the inlet 2113. It can be understood that the heating chamber 2211 of the heating furnace 22 is used to preheat or preheat the heat shrink tube 8.

[0073] The heating structure 2 of the present invention connects the heating chamber 2211 of the heating furnace 22 with the retraction chamber 2111 of the retraction box 211 in the retraction mechanism 21, so that the heating furnace 22 and the retraction box 211 are arranged in series, thereby performing secondary heating on the heat shrinkable tube 8 before entering the expansion mold 3, thereby eliminating or reducing the defect of unstable axial stretching rate of the heat shrinkable tube 8 and improving the quality of the finished product of the heat shrinkable tube 8; at the same time, by arranging part of the conveying component 213 in the retraction chamber 2111 of the retraction box 211, the conveying component 213 is utilized to Component 213 transports the heat shrink tube 8 that enters the retraction chamber 2111 through the inlet 2113 after being heated by the heating furnace 22 to the outlet 2112, so that the heat shrink tube 8 is expanded through the expansion mold 3, thereby completing the processing and shaping of the heat shrink tube 8; further, the retraction mechanism 21 can enable the heat shrink tube 8 to be fully retracted and shaped in the retraction chamber 2111 before expansion, further eliminating or reducing the defect of unstable axial stretching rate of the heat shrink tube 8, thereby improving the stability of expansion production and improving the quality of the finished heat shrink tube 8.

[0074] In this embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, the retraction box 211 includes a fixed plate, a surrounding plate and a bottom cover. The fixed plate and the bottom cover are arranged on opposite sides of the surrounding plate and enclose a retraction chamber 2111. The fixed plate is provided with an inlet 2113 and an outlet 2112 that are spaced apart. The bottom cover is rotatably connected to the surrounding plate to open or close the retraction chamber 2111. The heating component 212 is arranged on the bottom cover for heating the retraction chamber 2111.

[0075] It can be understood that the heating assembly 212 includes a heating tube and a tube cover. The heating tube is arranged on the side of the bottom cover of the retracting box 211 facing the fixed plate. The tube cover covers the heating tube and is connected to the bottom cover. The tube cover can be selected as a cover body, a box body or a cover body. The tube cover can be fixed on the bottom cover by welding or integral molding, which can improve the installation temperature resistance. Of course, the tube cover can also be detachably installed on the bottom cover by means of snap connection, plug-in matching, screw connection or pin connection, which can facilitate the disassembly, replacement or maintenance of the heating tube and improve convenience.

[0076] In this embodiment, the side of the fixed plate of the retracting box 211 facing the enclosure is provided with heat insulation cotton. It can be understood that by providing the heat insulation cotton, the heat of the fixed plate is effectively reduced, thereby facilitating the reduction of the temperature of the heat shrink tube 8 entering the expansion mold 3, thereby facilitating the expansion and shaping of the heat shrink tube 8.

[0077] It can be understood that a fixing lug is provided on the side of the bottom cover of the retracting box 211 facing away from the fixing plate, and the retracting mechanism 21 further includes a fixing seat and a driving cylinder, one end of the driving cylinder is rotatably connected to the fixing seat, and the other end of the driving cylinder is provided with a connector, which is rotatably connected to the fixing lug; the driving cylinder drives the bottom cover to open or close the retracting chamber 2111. By providing a fixing seat and a driving cylinder, the bottom cover can be automatically opened or closed by the driving cylinder, thereby preventing the bottom cover from scalding the user and improving safety.

[0078] In this embodiment, if Figure 3 As shown, the outer wall of the retraction box 211 is provided with a mounting plate, and the conveying assembly 213 includes a first driving member 2131, a driving shaft 2132, a driven shaft 2133 and a conveyor belt 2134, wherein the first driving member 2131 is arranged on the mounting plate; the driving shaft 2132 is passed through the retraction box 2111 and extends into the retraction chamber 2111, and the driving shaft 2132 is connected to the first driving member 2131 through a belt drive; the driven shaft 2133 is arranged in the retraction chamber 2111 and is spaced apart from the driving shaft 2132; the conveyor belt 2134 is sleeved on the driving shaft 2132 and the driven shaft 2133, and the conveyor belt 2134 is used to transport the heat shrink tube 8 in the retraction chamber 2111 from the inlet 2113 to the outlet 2112.

[0079] The first driving member 2131 can be selected as a driving motor, a driving motor or a servo motor, etc., which is not limited here. The driving shaft 2132 passes through the enclosure of the retraction box 211, one end of which extends into the retraction chamber 2111, and the other end is located outside the retraction box 211 and is connected to the first driving member 2131. It can be understood that the first driving member 2131 and the driving shaft 2132 are connected by belt transmission. The driving shaft 2132 is inserted into the enclosure through a bearing structure, so that the first driving member 2131 drives the driving shaft 2132 to rotate.

[0080] It is understandable that the driven shaft 2133 can be passed through the enclosure of the retraction box 211, and one end extends into the retraction chamber 2111. The driven shaft 2133 can also be completely arranged in the retraction chamber 2111, which is not limited here. In this embodiment, the driven shaft 2133 is connected to the enclosure of the retraction box 211 through a bearing structure, and the conveyor belt 2134 is sleeved on the driving shaft 2132 and the driven shaft 2133. In this way, when the first driving member 2131 drives the driving shaft 2132 to rotate, the conveyor belt 2134 and the driven shaft 2133 are driven to rotate, thereby enabling the conveyor belt 2134 to achieve the transmission of the heat shrink tube 8.

[0081] In one embodiment, if Figure 4 As shown, the retraction mechanism 21 further includes a temperature sensor 214 disposed in the retraction box 211 , one end of the temperature sensor 214 passes through the retraction box 211 and extends into the retraction cavity 2111 for detecting the temperature in the retraction cavity 2111 .

[0082] It can be understood that by setting the temperature sensor 214, the temperature in the retraction chamber 2111 can be monitored in real time by using the temperature sensor 214, so as to control the temperature in the retraction chamber 2111 by controlling the working condition of the heating tube in the heating assembly 212. In this embodiment, the heating structure 2 also includes a controller, and the temperature sensor 214 and the heating tube are both electrically connected to the controller, so that the temperature in the retraction chamber 2111 can be monitored by using the temperature sensor 214 to feedback to the controller, so as to control the working condition of the heating tube by using the controller.

[0083] In one embodiment, if Figure 1 and Figure 3 As shown, the retraction mechanism 21 also includes a curvature detector 215, which includes an emitter 2151 and a receiver 2152 arranged on opposite sides of the retraction box 211, and the receiver 2152 is arranged corresponding to the emitter 2151, and is used to detect the degree of curvature of the heat shrink tube 8 in the retraction cavity 2111.

[0084] In this embodiment, the enclosure of the retraction box 211 may be a quadrangular prism structure, and the enclosure includes a first side wall and a second side wall that are arranged opposite to each other, and the first side wall and the second side wall are transparent glass. By setting the first side wall and the second side wall as transparent glass, it is convenient to observe or monitor the retraction and shaping of the heat shrink tube 8 in the retraction chamber 2111 through the first side wall and the second side wall. Optionally, the extension direction of the first side wall and the second side wall is the same as the line connecting the inlet 2113 and the outlet 2112.

[0085] It can be understood that the retraction mechanism 21 includes two curvature detectors 215, which are arranged on the fixed plate of the retraction box 211 and are spaced apart from and arranged in parallel with the first side wall and the second side wall. One curvature detector 215 is arranged corresponding to the inlet 2113 and is electrically connected to the conveying assembly 213, and the other curvature detector 215 is arranged corresponding to the outlet 2112 and is electrically connected to the heating furnace 22. The curvature detector 215 is used to detect the degree of curvature of the heat shrink tube 8 in the retraction chamber 2111.

[0086] In this embodiment, a curvature detector 215 is provided so that the curvature detector 215 can detect the degree of curvature of the heat shrinkable tube 8 in the retraction chamber 2111 through the first side wall and the second side wall, thereby controlling the feeding or discharging speed of the heat shrinkable tube 8 in the retraction chamber 2111 to adjust or eliminate the defect of unstable axial stretching rate of the heat shrinkable tube 8.

[0087] It can be understood that each curvature detector 215 includes an emitter 2151 and a receiver 2152. The emitter 2151 is connected to the fixed plate and is located on the side of the first side wall facing away from the second side wall; the receiver 2152 is connected to the fixed plate and is located on the side of the second side wall facing away from the first side wall. The receiver 2152 is arranged corresponding to the emitter 2151.

[0088] In this embodiment, the emitter 2151 and the receiver 2152 are symmetrically arranged on opposite sides of the enclosure, that is, the emitter 2151 is located on the side of the first side wall facing away from the second side wall, and the receiver 2152 is located on the side of the second side wall facing away from the first side wall, so that the signal emitted by the emitter 2151 passes through the transparent first side wall and the second side wall to reach the receiver 2152. It can be understood that the two bending detectors 215 are used to detect the bending degree of the heat shrink tube 8 at the inlet 2113 and the outlet 2112 in the retraction chamber 2111, respectively.

[0089] In this embodiment, the heat shrinkable tube 8 in the retraction chamber 2111 has two free bending structures, namely corresponding to the inlet 2113 and the outlet 2112. By setting two curvature detectors 215 corresponding to the inlet 2113 and the outlet 2112 respectively, the height positions of the two free bending structures of the heat shrinkable tube 8 in the retraction chamber 2111 can be detected, thereby realizing the bending degree detection.

[0090] In one embodiment, if Figure 1 and Figure 4As shown, the retraction mechanism 21 also includes two guide assemblies 216 arranged in the retraction chamber 2111, one guide assembly 216 is arranged near the inlet 2113, and the other guide assembly 216 is arranged near the outlet 2112, the driving shaft 2132 and the driven shaft 2133 are located between the two guide assemblies 216, and each guide assembly 216 includes a connecting plate 2161 and a guide wheel 2162, one end of the connecting plate 2161 is connected to the inner wall of the retraction chamber 2111, and the guide wheel 2162 is rotatably connected to the other end of the connecting plate 2161, and the guide wheel 2162 is provided with a guide groove, which is used to accommodate the heat shrink tube 8.

[0091] In this embodiment, by providing a guide assembly 216, the guide assembly 216 is used to guide the heat shrink tube 8 at the inlet 2113 or the outlet 2112, so as to avoid transition bending of the heat shrink tube 8 during movement, thereby affecting the processing and production of the heat shrink tube 8 and the product quality. Each guide assembly 216 includes a connecting plate 2161 and a guide wheel 2162, one end of the connecting plate 2161 is connected to the inner wall of the retraction cavity 2111; the guide wheel 2162 is rotatably connected to the other end of the connecting plate 2161, and the guide wheel 2162 is provided with a guide groove, and the guide groove is used to accommodate the heat shrink tube 8.

[0092] In this embodiment, the connecting plate 2161 may be a U-shaped plate structure or two oppositely arranged plate structures, one end of the connecting plate 2161 is connected to the fixed plate, and the other end extends toward the retraction cavity 2111. The guide wheel 2162 is rotatably connected to the connecting plate 2161, and the guide wheel 2162 is provided with a guide groove, which is used to accommodate the heat shrink tube 8.

[0093] It can be understood that in order to adjust the position of the guide wheel 2162, multiple mounting positions are set on the connecting plate 2161, and the multiple mounting positions are arranged at intervals along the length direction of the connecting plate 2161. By adjusting the position of the guide wheel 2162 at the mounting position on the connecting plate 2161, the position adjustment of the guide wheel 2162 can be achieved.

[0094] In one embodiment, if Figure 1 and Figure 3 As shown, the heating furnace 22 includes a furnace body 221 and a conveying wheel 222. The furnace body 221 is arranged at the inlet 2113. The furnace body 221 is provided with a heating chamber 2211 and an inlet 2212. The inlet 2212 is located at the end of the furnace body 221 away from the inlet 2113. The conveying wheel 222 is arranged at the inlet 2212. The conveying wheel 222 includes two conveying rollers 2221 arranged opposite to each other. A conveying channel 2222 is formed between the two conveying rollers 2221. The conveying channel 2222 is opposite to and connected to the inlet 2212, and is used for conveying the heat shrink tube 8 of the tube release roller 11 to the inlet 2212.

[0095] In this embodiment, the furnace body 221 can be optionally a cylindrical or columnar structure with a cavity, that is, the furnace body 221 has a heating chamber 2211, one end of the furnace body 221 is connected to the inlet 2113 on the fixed plate 11 of the retraction box 211, and the other end of the furnace body 221 is formed with an inlet 2212, so that the heat shrink tube 4 on the tube roller 11 can enter the heating chamber 2211 from the inlet 2212 for preheating or pre-heating, enter the retraction chamber 2111 through the inlet 2113 for secondary heating and retraction shaping, and be transmitted to the outlet 2112 via the conveyor belt 2134, and the outlet 2112 is led out by the guide assembly 216 to enter the expansion mold 3 for expansion and shaping.

[0096] It can be understood that in order to allow the heat shrink tube 8 to smoothly enter the heating chamber 2211 from the inlet 2212, a conveying wheel 222 is provided at the inlet 2212, and the conveying wheel 222 includes two conveying rollers 2221 arranged opposite to each other, each conveying roller 2221 is provided with a groove, and the two grooves enclose a conveying channel 2222, that is, a conveying channel 2222 is formed between the two conveying rollers 2221, and the conveying channel 2222 is opposite to and connected to the inlet 2212, and is used to convey the heat shrink tube 8 to the inlet 2212.

[0097] For different heat shrink tubes 8, the curvature of the heat shrink tube 8 in the retraction box 211 can be set, so as to achieve the best effect of reducing the instability of the incoming material stretch rate. Maintaining this set of curvatures for continuous production can effectively reduce the quality problem of unstable axial stretch rate of the product. Due to the fluctuation of the incoming heat shrink tube 8, when the heat shrink tube 8 is retracted and shaped in the retraction box 211, these two sets of free bends will fluctuate randomly. In order to stabilize production, this fluctuation needs to be controlled to keep the curvature within the set range.

[0098] It can be understood that by controlling the speed of the conveying wheel 222 and the conveyor belt 2134, two groups of free bending states can be formed in the retraction chamber 2111 of the retraction box 211, ensuring that the heat shrink tube 8 can be fully retracted in the high elastic state. The bending tube between the heating furnace 22 and the conveyor belt 2134 is defined as the first bend, and the bending tube between the conveyor belt 2134 and the expansion mold 3 is defined as the second bend.

[0099] In this embodiment, the curvature of the first bend is kept under control by monitoring the high and low positions of the first bend through a curvature detector 215 corresponding to the inlet 2113. If the detected value is higher than the set value, it means that the retraction amount is too large and the incoming material needs to be increased in time. At this time, the tube delivery speed of the conveying wheel 222 needs to be increased; if the detected value is lower than the set value, it means that the retraction amount is too small and the incoming material needs to be reduced in time. At this time, the tube delivery speed of the conveying wheel 222 needs to be reduced. The curvature detector 215 and the speed of the conveying wheel 222 form a closed-loop control to maintain dynamic balance.

[0100] The curvature of the second bend is kept under control by monitoring the high and low position of the second bend through the curvature detector 215 corresponding to the outlet 2112. If the detected value is higher than the set value, it means that the retraction amount is too large and the incoming material needs to be increased in time. At this time, the conveying speed of the conveyor belt 2134 needs to be increased; if the detected value is lower than the set value, it means that the retraction amount is too small and the incoming material needs to be reduced in time. At this time, the conveying speed of the conveyor belt 2134 needs to be reduced. The curvature detector 215 and the speed of the conveyor belt 2134 form a closed-loop control to maintain dynamic balance.

[0101] In one embodiment, if Figure 1 , Figure 5 and Figure 6 As shown, the traction device 4 includes a base 41, a second driving member 42, a traction structure 43 and an auxiliary traction component 44, wherein the second driving member 42 is arranged on the base 41; the traction structure 43 is arranged on the base 41 and is transmission-connected to the second driving member 42, and the traction structure 43 is provided with a traction channel 432a; the auxiliary traction component 44 is arranged on the base 41 and is transmission-connected to the second driving member 42, and the auxiliary traction component 44 is provided with an auxiliary traction channel 44a for traction of the heat shrink tube 8, and the auxiliary traction channel 44a and the traction channel 432a are spaced apart and arranged in parallel.

[0102] In this embodiment, the base 41 is used to install, support and fix the second driving member 42, the traction structure 43 and the auxiliary traction assembly 44. The structure of the base 41 can be a support frame, a mounting frame, a mounting platform, a mounting shell or a housing, etc., which is not limited here. It can be understood that, for example Figure 1 and Figure 5 As shown, the base 41 includes a bottom plate and a protective cover arranged on the bottom plate, the protective cover and the bottom plate enclose a mounting cavity, the second driving member 42 is arranged in the mounting cavity, and the traction structure 43 and part of the auxiliary traction component 44 are arranged in the mounting cavity, so that the second driving member 42, the traction structure 43 and the auxiliary traction component 44 are protected by the protective cover.

[0103] It can be understood that the second driving member 42 is used to provide driving force for the traction structure 43 and the auxiliary traction assembly 44. The second driving member 42 can be a driving motor, a servo motor, a driving motor or a reducing motor, etc., which is not limited here.

[0104] In this embodiment, the traction structure 43 is used to achieve traction on the heat shrinkable tube 8. The traction structure 43 can be a traction roller group or other structures. By setting a traction channel 432a, the traction channel 432a is used to clamp and pull the heat shrinkable tube 8. The auxiliary traction component 44 is used to achieve traction on the heat shrinkable tube 8. The auxiliary traction component 44 can be a traction roller group or other structures. By setting an auxiliary traction channel 44a, the auxiliary traction channel 44a is used to clamp and pull the heat shrinkable tube 8. It can be understood that by cooperating with the traction structure 43, the traction channel 432a of the traction structure 43 and the auxiliary traction channel 44a of the auxiliary traction component 44 are used to simultaneously pull the heat shrinkable tube 8, thereby ensuring that the expanded heat shrinkable tube 8 is stably clamped and pulled out, avoiding the clamping force being too loose to slip or too tight to hinder the flow of gas in the tube, resulting in unstable expansion and thus causing a freeze.

[0105] The traction device 4 of the present invention is provided with a second driving member 42, a traction structure 43 and an auxiliary traction assembly 44 on the base 41, and uses a second driving member 42 to simultaneously drive the traction structure 43 and the auxiliary traction assembly 44 to operate, and uses the traction channel 432a of the traction structure 43 and the auxiliary traction channel 44a of the auxiliary traction assembly 44 to simultaneously pull the heat shrink tube 8, thereby ensuring that the expanded heat shrink tube 8 is stably clamped and pulled out, avoiding the expansion instability caused by the clamping force being too loose and slipping or too tight and hindering the flow of gas in the tube, thereby causing a crash. The traction device 4 of the present invention not only stably clamps and pulls out the expanded heat shrink tube 8, avoiding the expansion instability caused by the clamping force being too loose and slipping or too tight and hindering the flow of gas in the tube, thereby causing a crash, but also can ensure that the heat shrink tube 8 has a stable and continuous traction force after it leaves the mold during expansion, so that the expansion is stable and defective products are reduced.

[0106] In one embodiment, if Figure 5 and Figure 6As shown, the traction structure 43 includes a mounting seat 431, two crawler assemblies 432 and a first protective cover 433, wherein the mounting seat 431 is arranged on the base 41; the two crawler assemblies 432 are arranged in parallel and spaced apart from each other on the mounting seat 431, one end of the two crawler assemblies 432 is provided with a crawler 4321, the other end of the two crawler assemblies 432 is provided with a first gear 4323, the two first gears 4323 are meshed and connected, and one end of the crawler assembly 432 away from the crawler 4321 is provided with a first pulley 4322 The first pulley 4322 is spaced apart from the first gear 4323 and is connected to the second driving member 42 through the transmission belt 421. The two crawlers 4321 are arranged opposite to each other and cooperate to form a traction channel 432a. The first protective cover 433 is provided with a first cavity 4331 and a first notch 4332 connected to the first cavity 4331. The crawler 4321 is accommodated in the first cavity 4331 and partially exposed in the first notch 4332. The traction channel 432a is correspondingly connected to the first notch 4332.

[0107] In this embodiment, the mounting seat 431 is used to support, install and fix the two track assemblies 432 and the first protective cover 433. The structure of the mounting seat 431 can be a mounting plate, a mounting shell, a mounting table or a mounting frame, etc., which is not limited here. It can be understood that the mounting seat 431 can be set on the bottom plate and / or the protective cover of the base 41 by welding or integral molding, so as to improve the stability of the installation.

[0108] It can be understood that the two track assemblies 432 are arranged in parallel and at intervals, and the two track assemblies 432 are inserted into the mounting seat 431. Each track assembly 432 is provided with a track 4321 at one end passing through the mounting seat 431, so that the two tracks 4321 of the two track assemblies 432 are arranged opposite to each other and cooperate to form a traction channel 432a. In order to make the two track assemblies 432 rotate synchronously, so that the traction channel 432a formed by the two tracks 4321 can drive the heat shrink tube 8 to move and achieve traction of the heat shrink tube 8, the end of each track assembly 432 away from the track 4321 is in transmission connection, for example, a transmission belt, a chain, a gear meshing structure is used to achieve mutual transmission connection.

[0109] In this embodiment, in order to facilitate the second driving member 42 to drive the two track assemblies 432 to rotate, a first pulley 4322 is provided at one end of the track assembly 432 away from the track 4321, and the first pulley 4322 is connected to the second driving member 42 through the transmission belt 421. It can be understood that the output shaft of the second driving member 42 is provided with a pulley, so that the transmission belt 421 is sleeved on the pulley of the second driving member 42 and the first pulley 4322 of the track assembly 432, so that the second driving member 42 drives the pulley to drive the transmission belt 421 and the first pulley 4322 to rotate, so that the track assembly 432 provided with the first pulley 4322 rotates, thereby driving the other track assembly 432 to rotate synchronously, thereby providing power for the traction channel 432a.

[0110] It can be understood that the first protective cover 433 is used to protect the crawler 4321 and the traction channel 432a. In this embodiment, the first protective cover 433 is a shell or box or cover structure, that is, the first protective cover 433 has a first cavity 4331. In order to facilitate the heat shrink tube 8 in the traction channel 432a to be pulled from the first cavity 4331 to the auxiliary traction channel 44a, the first protective cover 433 is provided with a first notch 4332 connected to the first cavity 4331, so that the crawler 4321 is partially exposed in the first notch 4332, and the traction channel 432a is correspondingly connected to the first notch 4332.

[0111] In this embodiment, each track assembly 432 includes two track shafts, two traction wheels, two sprockets and a first gear 4323, wherein the two track shafts are spaced apart and arranged in parallel on the mounting seat 431; each traction wheel is arranged at one end of a track shaft, and the track 4321 is sleeved on the two traction wheels; each sprocket is arranged at one end of a track shaft away from the traction wheel, and the two sprockets are connected by a chain transmission; the first gear 4323 is arranged at one end of a track shaft away from the traction wheel, and the first gear 4323 is spaced apart from the sprocket; wherein the first gear 4323 of one track assembly 432 is meshed with the first gear 4323 of another track assembly 432.

[0112] In this embodiment, if Figure 6 As shown, each track assembly 432 may be provided with one or two track shafts. By providing two track shafts, the two track shafts are arranged in parallel and spaced apart from each other on the mounting seat 431, which can effectively increase the length of the traction channel 432a, thereby ensuring the traction force of the traction channel 432a on the heat shrink tube 8. It can be understood that the track shaft can be rotatably mounted on the mounting seat 431 through a bearing structure. A traction wheel is provided at one end of each track shaft, and a sprocket is provided at the other end, that is, the traction wheel and the sprocket are located on opposite sides of the mounting seat 431, thereby avoiding mutual interference between the traction wheel and the sprocket on the track shaft and achieving force balance.

[0113] It can be understood that the crawler 4321 is sleeved on the two traction wheels of each crawler assembly 432, so that the two crawlers 4321 of the two crawler assemblies 432 are arranged opposite to each other, thereby forming a traction channel 432a. The two crawler shafts are sleeved with a chain or a transmission belt on the two sprocket wheels to ensure that the two crawler shafts rotate synchronously. By arranging a first gear 4323 at one end of a crawler shaft away from the traction wheel, the two crawler assemblies 432 are meshed through the first gears 4323 of the two crawler shafts, thereby realizing transmission connection and synchronous rotation.

[0114] A track shaft on which the first gear 4323 is arranged in the two track assemblies 432 is also provided with a first pulley 4322, so that the first gear 4323 and the first pulley 4322 are coaxial and spaced apart, so that the driving pulley on the second driving member 42 drives the transmission belt 421 and the first pulley 4322 to rotate, so that a track shaft on which the first pulley 4322 is arranged rotates, driving the two first gears 4323 of the two track assemblies 432 to engage and rotate, thereby realizing synchronous rotation of the two track assemblies 432, and at the same time, the two track shafts of the track assembly 432 also realize synchronous rotation through the sprocket and chain, thereby providing power for the traction channel 432a.

[0115] In this embodiment, two track assemblies 432 are provided, and two track shafts are provided on each track assembly 432. The two track assemblies 432 and the two track shafts of each track assembly 432 are rotated synchronously by the cooperation of the sprocket and the first gear 4323, thereby ensuring that the four traction wheels of the two track assemblies 432 simultaneously drive the two tracks 4321 to rotate synchronously, thereby realizing the transmission and traction of the heat shrink tube 8 by the traction channel 432a.

[0116] In one embodiment, if Figure 5 and Figure 6 As shown, the mounting seat 431 includes a first mounting seat 4311 fixedly provided on the base 41 and a second mounting seat 4312 movably provided on the base 41. The first mounting seat 4311 and the second mounting seat 4312 are provided with coaxial mounting holes 4313. One track assembly 432 is passed through the first mounting seat 4311, and the other track assembly 432 is passed through the second mounting seat 4312.

[0117] It can be understood that by setting the mounting seat 431 as a first mounting seat 4311 and a second mounting seat 4312 that are spaced apart, and making the first mounting seat 4311 fixed to the base 41 and the second mounting seat 4312 movably arranged on the base 41, a track assembly 432 is passed through the first mounting seat 4311, and another track assembly 432 is passed through the second mounting seat 4312, so that the second mounting seat 4312 can drive one track assembly 432 to approach or move away from the other track assembly 432 of the first mounting seat 4311, thereby realizing the size adjustment of the traction channel 432a, thereby adjusting the extrusion deformation amount according to the heat shrink tube 8 of different specifications to provide appropriate traction force.

[0118] In one embodiment, if Figure 5 and Figure 6 As shown, the traction structure 43 also includes an adjusting component 434, and the adjusting component 434 includes an adjusting piece 4341 and a reset spring 4344, wherein the adjusting piece 4341 includes an adjusting rod 4342 and a handwheel 4343 arranged at one end of the adjusting rod 4342, and the adjusting rod 4342 is rotatably passed through two mounting holes 4313; the reset spring 4344 is sleeved on the adjusting rod 4342, and the two ends of the reset spring 4344 are elastically abutted against the first mounting seat 4311 and the second mounting seat 4312 respectively; wherein the handwheel 4343 drives the adjusting rod 4342 to rotate so as to make the second mounting seat 4312 approach or move away from the first mounting seat 4311.

[0119] In this embodiment, coaxially arranged mounting holes 4313 are respectively provided on the first mounting seat 4311 and the second mounting seat 4312, so that the adjusting rod 4342 of the adjusting member 4341 is sequentially inserted into the two mounting holes 4313, so that the adjusting rod 4342 is rotatably matched with the two mounting holes 4313, and the hand wheel 4343 can be used to drive the adjusting rod 4342 to rotate, so that the second mounting seat 4312 is close to or away from the first mounting seat 4311.

[0120] It can be understood that a bearing structure is provided in the mounting hole 4313 of the first mounting seat 4311, so that the adjusting rod 4342 is rotatably connected to the first mounting seat 4311 through the bearing structure, and a thread is provided in the mounting hole 4313 of the second mounting seat 4312, and an external thread is provided on the outer wall of the adjusting rod 4342, so that the external thread of the adjusting rod 4342 is matched with the thread in the mounting hole 4313 of the second mounting seat 4312 to realize the rotational connection.

[0121] In order to prevent the second mounting seat 4312 from driving one track assembly 432 to approach the other track assembly 432 with excessive force or rigidity during the rotation of the adjusting rod 4342, thereby causing the force of the traction channel 432a formed by the two tracks 4321 to be too large and flatten the heat shrink tube 8, a reset spring 4344 is provided on the adjusting rod 4342, so that the reset spring 4344 is located between the first mounting seat 4311 and the second mounting seat 4312, and elastically abuts against the first mounting seat 4311 and the second mounting seat 4312, so that reset buffering is achieved by using the reset spring 4344. In this way, by adjusting the gap between the two tracks 4321 (traction channel 432a), the traction structure 43 can adjust the extrusion deformation amount according to the heat shrink tubes 8 of different specifications to provide appropriate traction, thereby improving versatility and convenience.

[0122] In this embodiment, the second mounting seat 4312 is provided with a slide groove, the base body 41 is provided with a slide rail, and the slide groove and the slide rail are slidably matched. It can be understood that by providing the slide rail on the bottom plate of the base body 41 and providing the slide groove on the second mounting seat 4312, the movement of the second mounting seat 4312 is slidably guided by utilizing the slidable match between the slide groove and the slide rail.

[0123] In one embodiment, if Figure 5 As shown, the auxiliary traction assembly 44 includes a fixed seat 441, two auxiliary shafts 442 and a second protective cover 446, wherein the fixed seat 441 is arranged on the base 41; the two auxiliary shafts 442 are spaced apart and parallelly arranged on the fixed seat 441, one end of the two auxiliary shafts 442 is provided with an auxiliary traction wheel 443, the other end of the two auxiliary shafts 442 is provided with a second gear 444, the two second gears 444 are meshed and connected, and one end of the auxiliary shaft 442 away from the auxiliary traction wheel 443 is provided with a second pulley 445, the second belt The wheel 445 is spaced apart from the second gear 444 and is connected to the second driving member 42 through a transmission belt 421. The two auxiliary traction wheels 443 are arranged opposite to each other and cooperate to form an auxiliary traction channel 44a. The second protective cover 446 is provided with a second cavity 4461 and a second notch 4462 connected to the second cavity 4461. The two auxiliary traction wheels 443 are accommodated in the second cavity 4461 and partially exposed in the second notch 4462. The auxiliary traction channel 44a is correspondingly connected to the second notch 4462.

[0124] In this embodiment, the fixing seat 441 is used to install, support and fix the two auxiliary shafts 442 and the second protective cover 446. The structure of the fixing seat 441 can be a mounting plate, a mounting shell, a mounting table or a mounting frame, etc., which is not limited here. It can be understood that the fixing seat 441 can be set on the bottom plate and / or the protective cover of the base 41 by welding or integral molding, so as to improve the stability of the installation.

[0125] It can be understood that the two auxiliary shafts 442 can be rotatably installed in the fixed seat 441 through the bearing structure respectively. The two auxiliary shafts 442 are spaced and arranged in parallel. An auxiliary traction wheel 443 is provided at one end of each auxiliary shaft 442, so that the two auxiliary traction wheels 443 of the two auxiliary shafts 442 are arranged opposite to each other and cooperate to form an auxiliary traction channel 44a. In order to enable the two auxiliary shafts 442 to drive the two auxiliary traction wheels 443 to achieve synchronous rotation, one end of each auxiliary shaft 442 away from the auxiliary traction wheel 443 is in transmission connection, for example, a transmission belt, a chain, a gear meshing structure is used to achieve mutual transmission connection.

[0126] In this embodiment, a second gear 444 is disposed at one end of each auxiliary shaft 442 away from the auxiliary traction wheel 443 , that is, the second gear 444 and the auxiliary traction wheel 443 are located on opposite sides of the fixing seat 441 , and the two second gears 444 of the two auxiliary shafts 442 are meshed and connected.

[0127] In order to facilitate the second driving member 42 to drive the two auxiliary shafts 442 to rotate, a second pulley 445 is provided at one end of the auxiliary shaft 442 away from the auxiliary traction wheel 443, and the second pulley 445 is spaced apart from the second gear 444 and is connected to the second driving member 42 through the transmission belt 421. It can be understood that the output shaft of the second driving member 42 is provided with a pulley, so that the transmission belt 421 is sleeved on the pulley of the second driving member 42 and the second pulley 445 of the auxiliary shaft 442, so that the driving pulley of the second driving member 42 drives the transmission belt 421 and the second pulley 445 to rotate, so that the auxiliary shaft 442 provided with the second pulley 445 rotates, thereby driving the other auxiliary shaft 442 to rotate synchronously through the meshing connection of the two second gears 444, thereby providing power for the auxiliary traction channel 44a.

[0128] It can be understood that the second protective cover 446 is used to protect the two auxiliary traction wheels 443 and the auxiliary traction channel 44a. In this embodiment, the second protective cover 446 is a shell or box or cover structure, that is, the second protective cover 446 has a second cavity 4461. In order to facilitate the reeling of the heat shrink tube 8 in the auxiliary traction channel 44a, the second protective cover 446 is provided with a second notch 4462 connected to the second cavity 4461, so that the auxiliary traction wheel 443 is partially exposed in the second notch 4462, and the auxiliary traction channel 44a is correspondingly connected to the second notch 4462.

[0129] In this embodiment, if Figure 5 As shown, the fixed seat 441 includes a fixed body and a sliding plate arranged on the base 41, the fixed body is provided with a movable groove, the sliding plate is slidably connected in the movable groove, an auxiliary shaft 442 is passed through the fixed body, and another auxiliary shaft 442 is passed through the sliding plate.

[0130] It can be understood that by setting the fixed seat 441 as a fixed body and a sliding plate, the fixed body is fixed on the base 41, and by setting a movable groove on the fixed body and sliding the sliding plate in the movable groove, an auxiliary shaft 442 is passed through the fixed body, and the other auxiliary shaft 442 is passed through the sliding plate, so that the sliding plate drives an auxiliary shaft 442 to slide or move relative to the fixed body to approach or move away from the other auxiliary shaft 442, thereby realizing the size adjustment of the auxiliary traction channel 44a, thereby adjusting the extrusion deformation amount according to different specifications of the heat shrink tube 8 to provide appropriate traction force.

[0131] In one embodiment, if Figure 5 As shown, the auxiliary traction component 44 also includes a mounting plate and an adjusting screw. The mounting plate is arranged at the notch of the movable groove, and the mounting plate is provided with an adjusting hole connected to the movable groove; the adjusting screw is rotatably passed through the adjusting hole, and one end of the adjusting screw extending into the movable groove is rotatably connected to the sliding plate, and the other end of the adjusting screw is provided with a handwheel; wherein the handwheel drives the adjusting screw to rotate so that the sliding plate is close to or away from the mounting plate.

[0132] In this embodiment, the mounting plate can be fixed on the fixed body by welding or an integrally formed structure, and is located at the notch of the movable groove. Of course, in other embodiments, the mounting plate can also be arranged on the fixed body by means of snap connection, plug-in fit, screw connection or pin connection, which can improve the convenience of assembly and disassembly, and is not limited here.

[0133] It can be understood that the mounting plate is provided with an adjustment hole connected to the movable groove, and a thread can be provided in the adjustment hole. The outer wall of the adjustment screw is provided with an external thread, so that the external thread cooperates with the thread in the adjustment hole, so that the adjustment screw is rotated and penetrated into the adjustment hole, and one end of the adjustment screw passes through the adjustment hole and extends into the movable groove, and is rotatably connected with the sliding plate. A hand wheel is provided at the end of the adjustment screw away from the sliding plate, so that the hand wheel can be used to drive the adjustment screw to rotate, so that the sliding plate drives an auxiliary shaft 442 to approach or move away from another auxiliary shaft 442, thereby realizing the size adjustment of the auxiliary traction channel 44a.

[0134] Of course, in other embodiments, an adjusting cylinder or other adjusting structure may be connected to the sliding plate to achieve the size adjustment of the auxiliary traction channel 44a, which is not limited here. It can be understood that the inner wall of the movable groove is provided with a slide rail, and the sliding plate is provided with a slide groove that slides with the slide rail.

[0135] In this embodiment, an auxiliary traction component 44 is provided, so that the expanded heat shrink tube 8 is led out of the traction channel 432a of the traction structure 43 to the outside by the auxiliary traction component 44 for subsequent storage. The output linear velocity of the auxiliary traction component 44 is slightly greater than the linear velocity of the traction structure 43, which can ensure that the heat shrink tube 8 is always in a taut state between the traction channel 432a and the auxiliary traction channel 44a. The auxiliary traction component 44 adjusts the gap (auxiliary traction channel 44a) between the two auxiliary traction wheels 443 by adjusting the screw. By adjusting the gap, a slight slip occurs between the heat shrink tube 8 and the two auxiliary traction wheels 443, which can ensure that the drawn heat shrink tube 8 is always in a taut state and avoid the stretching deformation of the heat shrink tube 8. At the same time, the extrusion deformation of the heat shrink tube 8 is small, which also ensures that the compressed gas inside the heat shrink tube 8 flows well.

[0136] It can be understood that when the hand wheel drives the adjusting screw to rotate, thereby adjusting the gap between the two auxiliary traction wheels 443 (auxiliary traction channel 44a), the two second gears 444 of the two auxiliary shafts 442 are still engaged and transmitted, that is, the gap between the two auxiliary traction wheels 443 is fine-tuned within a certain range, and the center distance of the second gear 444 changes within this range, which can still ensure that the two second gears 444 can be stably engaged.

[0137] In one embodiment, if Figure 5 As shown, the traction device 4 also includes a limiting assembly 45, which includes a fixed plate 451 and two limiting rods 452. The fixed plate 451 is arranged on the base 41 and is located between the traction structure 43 and the auxiliary traction assembly 44. The two limiting rods 452 are arranged at one end of the fixed plate 451 away from the base 41. The two limiting rods 452 are arranged in parallel and at intervals, and cooperate to form a limiting groove 453. The limiting groove 453 is located on the same straight line as one end of the traction channel 432a and the auxiliary traction channel 44a.

[0138] It can be understood that by setting the limiting component 45 between the traction structure 43 and the auxiliary traction component 44, the limiting groove 453 of the limiting component 45 is located on the same straight line as one end of the traction channel 432a and the auxiliary traction channel 44a, so that the limiting groove 453 is used to guide and limit the heat shrink tube 8 between the traction channel 432a and the auxiliary traction channel 44a, so as to prevent the heat shrink tube 8 from slipping from the traction channel 432a and / or the auxiliary traction channel 44a during the traction process to cause defective products.

[0139] In this embodiment, the fixing plate 451 may be a plate-shaped or rod-shaped structure, which is not limited here. The fixing plate 451 is used to support, fix and install two limiting rods 452. The limiting rods 452 may be a plate-shaped or rod-shaped structure, and the two limiting rods 452 are arranged in parallel and at intervals on the fixing plate 451, and cooperate to form a limiting groove 453.

[0140] It can be understood that one of the two limiting rods 452 is fixedly connected to the fixed plate 451, and the other limiting rod 452 is movably connected to the fixed plate 451, so that the distance between the two limiting rods 452 can be adjusted to adjust the size of the limiting groove 453, thereby ensuring that the limiting groove 453 can be suitable for heat shrink tubes 8 of different sizes, thereby improving versatility and ease of use.

[0141] In this embodiment, a strip hole is provided on the fixing plate 451, and a limiting rod 452 is provided through the strip hole and can move along the strip hole to achieve an adjustable distance between the two limiting rods 452, which is not limited here. The limiting assembly 45 of this embodiment is used to limit the conveying position of the heat shrink tube 8 through the limiting groove 453, ensuring that the heat shrink tube 8 is conveyed on the central plane of the traction channel 432a or the auxiliary traction channel 44a, and preventing the heat shrink tube 8 from running off.

[0142] In one embodiment, if Figure 5 As shown, the traction device 4 also includes a tensioning assembly 46 located between the second driving member 42 and the traction structure 43 and / or the auxiliary traction assembly 44. The tensioning assembly 46 includes a limit plate 461, a roller shaft 463 and a screw 465. The limit plate 461 is arranged on the base 41, and the limit plate 461 is provided with a strip hole 462. One end of the roller shaft 463 is provided with a roller 464, and the other end of the roller shaft 463 is passed through the strip hole 462 and is provided with a screw hole. One end of the screw 465 passes through the base 41 and the limit plate 461, extends into the strip hole 462, and is passed through the screw hole.

[0143] In this embodiment, the limit plate 461 is used to support, install and fix the roller shaft 463, the roller 464 and the screw 465. The structure of the limit plate 461 can be a plate-like structure, a mounting platform, a mounting frame or a mounting seat, etc., which is not limited here. It can be understood that the limit plate 461 can be set on the bottom plate of the base 41 by welding or integral molding, which can improve the installation stability. Of course, in other embodiments, the limit plate 461 can also be set on the bottom plate of the base 41 in a detachable manner such as a snap connection, plug-in fit, screw connection or pin connection, which can improve the convenience of disassembly and assembly of the tensioning assembly 46.

[0144] It can be understood that by providing the strip hole 462 on the limiting plate 461, the strip hole 462 is extended along the length direction of the limiting plate 461, so that the roller shaft 463 is passed through the strip hole 462, so that the roller shaft 463 is convenient to move along the strip hole 462, thereby realizing the position adjustment of the roller shaft 463. In this embodiment, the roller 464 is rotatably sleeved on the roller shaft 463 through the bearing structure, and the roller 464 is used to abut against the transmission belt 421. By adjusting the position of the roller shaft 463, the roller 464 can realize the compression or tensioning of the transmission belt 421, thereby ensuring the good transmission of the second driving member 42.

[0145] In this embodiment, a screw rod 465 is provided, and a screw hole is provided at one end of the roller shaft 463 extending into the strip hole 462, so that one end of the screw rod 465 penetrates the base 41 and the limiting plate 461 and extends into the strip hole 462, and is inserted into the screw hole, so that the roller shaft 463 is moved along the strip hole 462 by rotating the screw rod 465, so that the position of the roller shaft 463 can be adjusted. Of course, in other embodiments, the screw rod 465 can also be replaced by an adjustment cylinder or other adjustment structure, which is not limited here.

[0146] The traction device 4 of the present invention is provided with a traction structure 43, and the traction structure 43 is used to evenly and stably lead the heat shrink tube 8 out of the expansion mold 8. The crawler structure can ensure that sufficient traction is provided to the heat shrink tube 8 under a small extrusion deformation. The crawler 4321 adjusts the gap and adjusts the extrusion deformation according to the heat shrink tubes 8 of different specifications to provide appropriate traction. By providing an auxiliary traction component 44, the expanded heat shrink tube 8 is led out from the inside of the traction structure 43 to the outside for subsequent storage. The output linear velocity of the auxiliary traction assembly 44 is slightly greater than the linear velocity of the traction structure 43, which can ensure that the heat shrink tube 8 is always in a taut state between the traction channel 432a and the auxiliary traction channel 44a. The gap between the two auxiliary traction wheels 443 of the auxiliary traction assembly 44 is adjustable. By adjusting the gap, a slight slip occurs between the heat shrink tube 8 and the two auxiliary traction wheels 443, which can ensure that the drawn heat shrink tube 8 is always in a taut state and avoid the stretching deformation of the heat shrink tube 8. At the same time, the extrusion deformation of the tube is small, which also ensures that the compressed gas inside the heat shrink tube 8 flows well. The output shaft of the second driving member 42 is connected to the traction structure 43 and the auxiliary traction assembly 44 by using a transmission belt 421, ensuring that the traction structure 43 and the auxiliary traction assembly 44 are provided with stable power. The setting of the limit assembly 45 uses the limit groove 453 to limit the conveying position of the heat shrink tube 8, ensuring that the heat shrink tube 8 is transmitted in the center plane of the traction channel 432a and / or the auxiliary traction channel 44a, and preventing the heat shrink tube 8 from running off. It can be understood that by setting up the tensioning assembly 46, the roller shaft 463 is used to cooperate with the strip hole 462 and the screw 465 on the limit plate 461, so that the roller shaft 463 drives the roller 464 to press or tension the transmission belt 421 between the output shaft of the second driving member 42 and the traction structure 43 and / or the transmission belt 421 between the output shaft of the second driving member 42 and the auxiliary traction assembly 44, thereby ensuring smooth transmission.

[0147] In one embodiment, if Figure 1 and Figure 2As shown, the tube release structure 1 includes a first base 12, a first drive assembly 13 and a first tension assembly 14. The first base 12 is provided with a accommodating cavity 121. The first drive assembly 13 includes a first drive motor 131 arranged on the first base 12 and two first drive rollers 132 connected to the first drive motor 131. The two first drive rollers 132 are arranged in the accommodating cavity 121 at intervals and cooperate to form a first transmission groove 133. The tube release roller 11 is placed in the first transmission groove 133. The first tension assembly 14 includes a first bracket 141 and a first guide wheel 143 arranged on the first base 12. The first bracket 141 is provided with a first detection groove 142. The first guide wheel 143 is arranged on the first bracket 141 and corresponds to the first detection groove 142. The heat shrink tube 8 of the tube release roller 11 passes through the first detection groove 142 and abuts against the first guide wheel 143.

[0148] In this embodiment, the first base 12 is used to support, install and fix the first drive assembly 13 and the first tension assembly 14 and other components. The first base 12 can be a mounting plate, a mounting shell, a mounting table, a mounting frame and other structures, which are not limited here. Of course, in other embodiments, in order to make the structures of the first drive assembly 13 and the first tension assembly 14 match, the first base 12 can also be a bracket structure or a gantry structure with a certain height difference, which is not limited here.

[0149] It can be understood that by providing the accommodating cavity 121 on the first base 12, it is convenient to use the accommodating cavity 121 to accommodate and install the two first transmission rollers 132 of the first driving assembly 13, and it can also provide space for the placement and rolling of the tube placing roller 11. The first driving motor 131 can be a structure that can provide driving force, such as a driving motor, a driving motor, a servo motor, etc., which is not limited here.

[0150] In this embodiment, two first transmission rollers 132 are arranged in parallel in the accommodating cavity 121 of the first base 12 at intervals, and the two first transmission rollers 132 are spaced to form a first transmission groove 133. It can be understood that the first transmission roller 132 is installed on the first base 12 through a bearing structure, and in order to prevent the first transmission roller 132 from causing wear on the tube release roller 11, a rubber-coated structure is provided on the first transmission roller 132. The two first transmission rollers 132 are connected to the first drive motor 131 through a belt, so that the two first transmission rollers 132 can be synchronously driven to rotate by the first drive motor 131, thereby driving the tube release roller 11 in the first transmission groove 133 to rotate to achieve tube release.

[0151] It can be understood that the use of the tube release structure 1 eliminates the problem of excessive expansion and stretching and machine crash caused by folding or compression deformation of the expanded finished heat shrink tube 8, eliminates the problem of tube knotting and machine crash in the next packaging process, and paves the way for packaging automation.

[0152] In this embodiment, by providing the first tension assembly 14, a first detection groove 142 is provided on the first bracket 141, so that the heat shrink tube 8 on the tube release roller 11 passes through the first detection groove 142, and the first detection groove 142 can be used to detect the height of the heat shrink tube 8, thereby adjusting the working condition of the first drive motor 131 to adjust the tube release speed. By providing the first guide wheel 143 on the first bracket 141, the first guide wheel 143 is used to guide the heat shrink tube 8 passing through the first detection groove 142, so as to prevent the heat shrink tube 8 from being bent or compressed and deformed.

[0153] In one embodiment, if Figure 1 and Figure 7 As shown, the tube collection structure 5 includes a second base 52, a second driving assembly 53, a second tension assembly 54 and a cable assembly 55. The second base 52 is provided with a receiving cavity 521. The second driving assembly 53 includes a second driving motor 531 provided on the second base 52 and two second driving rollers 532 connected to the second driving motor 531. The two second driving rollers 532 are rotatably provided in the receiving cavity 521 and cooperate to form a second transmission groove 533. The tube collection roller 51 is placed in the second transmission groove 533. The second tension assembly 54 is provided with a second tension assembly 55. The component 54 includes a second bracket 541 and a second guide wheel 543 provided on the second base 52. The second bracket 541 is provided with a second detection groove 542. The second guide wheel 543 is provided on the second bracket 541 and corresponds to the second detection groove 542. The wire arrangement component 55 is provided on the second base 52. The wire arrangement component 55 is provided with a wire arrangement wheel 551 located between the tube receiving roller 51 and the second detection groove 542. The heat shrink tube 8 passes through the second guide wheel 543, the second detection groove 542 and the wire arrangement wheel 551 in sequence and is wound on the tube receiving roller 51.

[0154] In this embodiment, the second base 52 is used to support, install and fix the second drive assembly 53, the second tension assembly 54 and the cable assembly 55. The second base 52 can be a mounting plate, a mounting shell, a mounting table, a mounting frame and other structures, which are not limited here. Of course, in other embodiments, in order to make the structures of the second drive assembly 53, the second tension assembly 54 and the cable assembly 55 match, the second base 52 can also be a bracket structure or a gantry structure with a certain height difference, which is not limited here.

[0155] It can be understood that by providing the accommodating cavity 521 on the second base 52, it is convenient to utilize the accommodating cavity 521 to accommodate and install the two second transmission rollers 532 of the second driving assembly 53, and it can also provide space for the placement and rolling of the tube collecting roller 51. The second driving motor 531 can be a driving motor, a driving motor, a servo motor, etc., which can provide a driving force, and is not limited here.

[0156] In this embodiment, two second transmission rollers 532 are arranged in parallel in the accommodating cavity 521 of the second base 52, and the two second transmission rollers 532 are arranged in parallel to form a second transmission groove 533. It can be understood that the second transmission roller 532 is installed on the second base 52 through a bearing structure, and in order to prevent the second transmission roller 532 from wearing the tube collecting roller 51, a rubber-coated structure is provided on the second transmission roller 532. The two second transmission rollers 532 are connected to the second driving motor 531 through a belt, so that the two second transmission rollers 532 can be synchronously driven to rotate by the second driving motor 531, thereby driving the tube collecting roller 51 in the second transmission groove 533 to rotate to achieve tube collection.

[0157] It can be understood that by providing the second tension assembly 54, the second detection slot 542 is provided on the second bracket 541, so that the heat shrink tube 8 passing through the traction device 4 passes through the second detection slot 542, and the second detection slot 542 can be used to detect the height of the heat shrink tube 8, thereby adjusting the working condition of the second drive motor 531 to adjust the tube collection speed. By providing the second guide wheel 543 on the second bracket 541, the heat shrink tube 8 passing through the traction device 4 is guided by the second guide wheel 543 to prevent the heat shrink tube 8 from being bent or compressed and deformed.

[0158] In this embodiment, the cable arrangement assembly 55 is arranged on the second base 52, so that the cable arrangement wheel 551 of the cable arrangement assembly 55 can further guide and arrange the heat shrink tube 8, thereby preventing the heat shrink tube 8 wound on the tube roller 51 from being bent or compressed and deformed. Optionally, the cable arrangement assembly 55 can be a cable arrangement device, etc., which is not limited here.

[0159] In one embodiment, if Figure 1 As shown, the processing equipment 100 also includes a caliper 6, which is arranged between the expansion mold 3 and the traction channel 432a. The caliper 6 is used to detect the diameter of the heat shrink tube 8 passing through the expansion mold 3.

[0160] It is understandable that by setting a caliper 6 at the outlet of the expansion mold 3, the outer diameter of the expanded finished heat shrink tube 8 can be monitored at any time by using the caliper 6. If the outer diameter does not meet the tolerance range required by the setting, the system will issue an alarm. Optionally, the caliper 6 can be a non-contact outer diameter detector.

[0161] In one embodiment, if Figure 1 As shown, the processing equipment 100 also includes a speed meter 7, which is arranged between the outlet 2112 and the expansion mold 3, and is used to detect the conveying speed of the heat shrink tube 8 at the outlet 2112.

[0162] It can be understood that by setting a tachometer 7 at the inlet of the expansion mold 3, the tachometer 7 is used to detect the speed change of the inlet of the expansion mold 3, which can truly reflect the change of expansion and stretching. By automatically adjusting the speed of the heat shrink tube 8 entering the expansion mold 3, the expansion and stretching can be accurately controlled. The fluctuation of the expansion and stretching rate of the heat shrink tube 8 can be regarded as caused by the fluctuation of the speed difference of the heat shrink tube 8 entering and exiting the expansion mold 3, and the speed out of the expansion mold 3 is the linear speed of the motor output of the traction device 4, which can be regarded as constant. The speed of the inlet is the synthesis of the speed of the traction speed of the outlet after overcoming the resistance and the vacuum suction speed at the inlet. This synthetic speed is in dynamic change. By adjusting the vacuum degree, the speed of the inlet can be adjusted, thereby adjusting the expansion and stretching rate. Because the vacuum degree directly acts on the expansion mold 3, the response speed is fast, so the expansion and stretching rate can be accurately adjusted.

[0163] The processing equipment 100 of the present invention adds a lateral retraction mechanism 21 to the heating structure 21, and uses the retraction mechanism 21 to retract and shape the heat shrink tube 8 before it enters the expansion mold 3 for expansion, thereby eliminating the influence of the tensile deformation factors of each link before the heat shrink tube 8 is introduced on the change of the elongation rate of the expanded finished product.

[0164] It is understandable that the heat shrink tube 8 forms two free bends when passing through the retraction box 211, which enables the heat shrink tube 8 to fully retract freely between the two free bends in a highly elastic state to restore the consistency of the material itself. Due to the early deformation fluctuations of each section of the heat shrink tube 8, the retraction length fluctuates, and the length fluctuation directly affects the change in the shape of the two free bends. If the length fluctuates, the heat shrink tube 8 will become tight or sag and hit the wall, which directly affects the expansion. At this time, it is necessary to adjust the conveying speed in front of the free bend to ensure that the curvature fluctuates within a reasonable range, thereby ensuring the stable operation of the system.

[0165] The height of the free bend is detected by the curvature detector 215 (or the image observation instrument) and fed back to the automatic control system. When the curvature of the free bend 1 exceeds the set highest point, the conveying speed of the conveying wheel 222 is increased to make the free bend 1 descend to the set height range. When the curvature of the free bend 1 is lower than the set lowest point, the conveying speed of the conveying wheel 222 is reduced to make the free bend 1 rise to the set height range. When the curvature of the free bend 2 exceeds the set highest point, the conveying speed of the conveying assembly 213 is increased to make the free bend 2 descend to the set height range. When the curvature of the free bend 2 is lower than the set lowest point, the conveying speed of the conveying assembly 213 is reduced to make the free bend 2 rise to the set height range.

[0166] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A processing equipment for heat shrink tube expansion processing, characterized in that: The processing equipment includes: A tube unwinding structure, wherein the tube unwinding structure is provided with a tube unwinding roller, and the tube unwinding roller is used to unwind the heat shrink tube; A heating structure, the heating structure is arranged adjacent to the tube placing structure, the heating structure comprises a retracting mechanism and a heating furnace arranged on the retracting mechanism, the heating furnace is provided with a heating chamber and an inlet communicating with the heating chamber, the retracting mechanism is provided with a retracting chamber and an outlet communicating with the retracting chamber, the heating chamber is communicated with the retracting chamber, and the heating chamber and the retracting chamber are used to heat the heat shrinkable tube; An expansion mold, the expansion mold is arranged at the outlet and is used for expanding the heat shrink tube; A traction device, the traction device is arranged adjacent to the expansion mold, and the traction device is provided with a traction channel arranged opposite to the expansion mold; and a tube collecting structure, the tube collecting structure being arranged adjacent to the traction device, the tube collecting structure being provided with a tube collecting roller, the tube collecting roller being used to collect the heat shrinkable tube passing through the traction channel; Wherein, the retraction mechanism includes a retraction box, a heating component, a conveying component and two curvature detectors, the retraction box is provided with the retraction chamber and the inlet and the outlet connected to the retraction chamber, the heating furnace is arranged at the inlet, the heating chamber is connected with the retraction chamber through the inlet, the heating component is arranged on the inner wall of the retraction chamber, and is arranged corresponding to the inlet and the outlet, the conveying component includes a first driving member, a driving shaft, a driven shaft and a conveyor belt, the driving shaft is arranged in the retraction chamber, the first driving member is arranged in the retraction box, and passes through the retraction box and is transmission-connected with the driving shaft, the driven shaft is arranged in the retraction chamber, and is parallel to and spaced from the driving shaft, the conveyor belt is sleeved on the driving shaft and the driven shaft, the curvature detector includes An emitter and a receiver are arranged on opposite sides of the retraction box, and the receiver is arranged corresponding to the emitter, and is used to detect the bending degree of the heat shrinkable tube in the retraction chamber. The heating furnace includes a furnace body and a conveying wheel. The furnace body is arranged at the inlet. The furnace body is provided with the heating chamber and the inlet. The inlet is located at the end of the furnace body away from the inlet. The conveying wheel is arranged at the inlet. The conveying wheel includes two conveying rollers arranged opposite to each other. A conveying channel is formed between the two conveying rollers. The conveying channel is opposite to and connected to the inlet, and is used to convey the heat shrinkable tube of the tube release roller to the inlet; the two bending degree detectors are respectively arranged corresponding to the inlet and the outlet, so as to detect the height of the two free bending structures of the heat shrinkable tube in the retraction chamber.

2. The processing equipment according to claim 1, characterized in that The retraction mechanism further includes a temperature sensor disposed in the retraction box, one end of the temperature sensor passes through the retraction box and extends into the retraction cavity, for detecting the temperature in the retraction cavity; And / or, the retraction mechanism also includes two guide assemblies arranged in the retraction chamber, one of the guide assemblies is arranged adjacent to the inlet, and the other of the guide assemblies is arranged adjacent to the outlet, the driving shaft and the driven shaft are located between the two guide assemblies, each of the guide assemblies includes a connecting plate and a guide wheel, one end of the connecting plate is connected to the inner wall of the retraction chamber, the guide wheel is rotatably connected to the other end of the connecting plate, and the guide wheel is provided with a guide groove, and the guide groove is used to accommodate the heat shrink tube.

3. The processing equipment according to claim 1, characterized in that The traction device comprises: matrix; a second driving member, the second driving member being disposed on the base; a traction structure, the traction structure being disposed on the base and drivingly connected to the second driving member, the traction structure being provided with the traction channel; and An auxiliary traction component is arranged on the base and is drivingly connected to the second driving member. The auxiliary traction component is provided with an auxiliary traction channel for traction of the heat shrink tube, and the auxiliary traction channel is spaced apart and arranged in parallel with the traction channel.

4. The processing equipment according to claim 3, characterized in that The traction structure comprises: A mounting seat, the mounting seat being arranged on the base; Two crawler assemblies, the two crawler assemblies are arranged in parallel and at intervals on the mounting seat, one end of the two crawler assemblies is provided with a crawler, the other end of the two crawler assemblies is provided with a first gear, the two first gears are meshed and connected, one end of the crawler assembly away from the crawler is provided with a first pulley, the first pulley is arranged at an interval from the first gear, and is transmission-connected to the second driving member through a transmission belt, the two crawlers are arranged opposite to each other, and cooperate to form the traction channel; and The first protective cover is provided with a first cavity and a first notch communicating with the first cavity, the crawler belt is accommodated in the first cavity and partially exposed in the first notch, and the traction channel is correspondingly communicated with the first notch.

5. The processing equipment according to claim 4, characterized in that The mounting seat comprises a first mounting seat fixedly mounted on the base and a second mounting seat movably mounted on the base, the first mounting seat and the second mounting seat are provided with mounting holes arranged coaxially, one track assembly is passed through the first mounting seat, and the other track assembly is passed through the second mounting seat; The traction structure further includes an adjustment component, and the adjustment component includes: An adjusting member, the adjusting member comprising an adjusting rod and a hand wheel provided at one end of the adjusting rod, the adjusting rod being rotatably passed through the two mounting holes; and A return spring, wherein the return spring is sleeved on the adjusting rod, and two ends of the return spring are elastically abutted against the first mounting seat and the second mounting seat respectively; The hand wheel drives the adjusting rod to rotate so that the second mounting seat is moved closer to or away from the first mounting seat.

6. The processing equipment according to claim 3, characterized in that: The auxiliary traction assembly comprises: A fixing seat, the fixing seat being arranged on the base; Two auxiliary shafts, the two auxiliary shafts are arranged in parallel and at intervals through the fixing seat, one end of the two auxiliary shafts is provided with an auxiliary traction wheel, the other end of the two auxiliary shafts is provided with a second gear, the two second gears are meshed and connected, one end of the auxiliary shaft away from the auxiliary traction wheel is provided with a second pulley, the second pulley is arranged at intervals from the second gear, and is transmission-connected to the second driving member through a transmission belt, the two auxiliary traction wheels are arranged opposite to each other, and cooperate to form the auxiliary traction channel; and The second protective cover is provided with a second cavity and a second notch communicating with the second cavity, the two auxiliary traction wheels are accommodated in the second cavity and partially exposed in the second notch, and the auxiliary traction channel is correspondingly communicated with the second notch.

7. The processing equipment according to claim 3, characterized in that: The traction device further includes a limiting assembly, the limiting assembly includes a fixing plate and two limiting rods, the fixing plate is arranged on the base and is located between the traction structure and the auxiliary traction assembly, the two limiting rods are arranged at one end of the fixing plate away from the base, the two limiting rods are arranged in parallel and at intervals, and cooperate to form a limiting groove, and the limiting groove is located on the same straight line as one end of the traction channel and the auxiliary traction channel; And / or, the traction device also includes a tensioning assembly located between the second driving member and the traction structure and / or the auxiliary traction assembly, the tensioning assembly includes a limit plate, a roller shaft and a screw, the limit plate is arranged on the base, the limit plate is provided with a strip hole, one end of the roller shaft is provided with a roller, the other end of the roller shaft is passed through the strip hole and is provided with a screw hole, one end of the screw passes through the base and the limit plate, extends into the strip hole, and is passed through the screw hole.

8. The processing equipment according to any one of claims 1 to 7, characterized in that The tube-releasing structure comprises a first base, a first driving assembly and a first tension assembly, wherein the first base is provided with an accommodating cavity, the first driving assembly comprises a first driving motor arranged on the first base and two first transmission rollers connected to the first driving motor by transmission, the two first transmission rollers are arranged in the accommodating cavity at intervals and cooperate to form a first transmission groove, the tube-releasing roller is placed in the first transmission groove, the first tension assembly comprises a first bracket and a first guide wheel arranged on the first base, the first bracket is provided with a first detection groove, the first guide wheel is arranged on the first bracket and is arranged corresponding to the first detection groove, the heat shrink tube of the tube-releasing roller passes through the first detection groove and abuts against the first guide wheel; And / or, the tube collecting structure includes a second base, a second drive assembly, a second tension assembly and a wire arranging assembly, the second base is provided with a accommodating cavity, the second drive assembly includes a second drive motor arranged on the second base and two second transmission rollers connected to the second drive motor in transmission, the two second transmission rollers are rotatably arranged in the accommodating cavity and cooperate to form a second transmission groove, the tube collecting roller is placed in the second transmission groove, the second tension assembly includes a second bracket and a second guide wheel arranged on the second base, the second bracket is provided with a second detection groove, the second guide wheel is arranged on the second bracket and corresponding to the second detection groove, the wire arranging assembly is arranged on the second base, the wire arranging assembly is provided with a wire arranging wheel located between the tube collecting roller and the second detection groove, the heat shrink tube passes through the second guide wheel, the second detection groove and the wire arranging wheel in sequence, and is wound on the tube collecting roller.

9. The processing equipment according to any one of claims 1 to 7, characterized in that: The processing equipment further comprises a caliper, which is disposed between the expansion die and the traction channel, and is used to detect the diameter of the heat shrink tube passing through the expansion die; And / or, the processing equipment further includes a speed meter, which is disposed between the outlet and the expansion mold, and is used to detect a conveying speed of the heat shrink tube at the outlet.

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