Heating shaping device

Abstract

The present invention discloses a heating and shaping device, comprising a retraction structure, a heating furnace, and an expansion die. The retraction structure comprises a retraction box and a conveying assembly. The retraction box is provided with a retraction chamber and an inlet and an outlet communicating with the retraction chamber. Part of the conveying assembly is disposed within the retraction chamber for conveying heat shrink tubing. The heating furnace is disposed within the retraction box, corresponding to the inlet, and is provided with a heating chamber communicating with the inlet, for preheating the heat shrink tubing. The expansion die is disposed within the retraction box, corresponding to the outlet, and is used to expand the heat shrink tubing. The present invention aims to provide a heating and shaping device capable of eliminating or reducing the defect of unstable axial elongation of heat shrink tubing, thereby improving the quality of the finished product.

Description

Technical Field

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

[0002] The production of heat shrink tubing involves a series of key steps, including masterbatch, extrusion, irradiation, expansion, and packaging. Expansion is the final step in finalizing the product's shape. After repeated reeling and turnover in the pre-expansion process, the original tube will accumulate defects such as uneven axial stretch. Conventional heating methods during expansion cannot eliminate this unstable axial stretch. These defects can lead to unstable axial stretch in the finished product after expansion, resulting in product quality issues. Summary of the Invention

[0003] The main purpose of the present invention is to provide a heating and shaping device, which aims to provide a heating and shaping device that can eliminate or reduce the defect of unstable axial stretching rate of heat shrinkable tubes, and the heating and shaping device can improve the quality of the finished product of the heat shrinkable tube.

[0004] To achieve the above-mentioned purpose, the present invention proposes a heating and shaping device for processing heat shrinkable tubes, the heating and shaping device comprising:

[0005] A retraction structure, comprising a retraction box and a conveying assembly, wherein the retraction box is provided with a retraction cavity and an inlet and an outlet communicating with the retraction cavity, and a portion of the conveying assembly is provided in the retraction cavity for conveying the heat shrink tubing;

[0006] A heating furnace, the heating furnace being provided in the retraction box and corresponding to the inlet, the heating furnace being provided with a heating chamber communicating with the inlet, the heating chamber being used to preheat the heat shrink tubing; and

[0007] An expansion mold is provided in the retraction box and is arranged corresponding to the outlet. The expansion mold is used for expanding the heat shrink tube.

[0008] In one embodiment, the retraction box includes a fixed plate, a surrounding plate, a bottom cover and a heating assembly. The fixed plate and the bottom cover are arranged on opposite sides of the surrounding plate and enclosed to form the retraction chamber. The fixed plate is provided with the inlet and the outlet arranged at intervals. The bottom cover is rotatably connected to the surrounding plate to open or close the retraction chamber. The heating assembly is arranged on the bottom cover for heating the retraction chamber.

[0009] In one embodiment, the heating assembly includes a heating tube and a tube cover, wherein the heating tube is provided on a side of the bottom cover facing the fixed plate, and the tube cover covers the heating tube and is connected to the bottom cover;

[0010] And / or, heat insulation cotton is provided on the side of the fixing plate facing the enclosure.

[0011] In one embodiment, a fixing lug is provided on a side of the bottom cover facing away from the fixing plate, and the retractable structure further comprises:

[0012] Mounting bracket; and

[0013] A driving cylinder, one end of which is rotatably connected to the fixing seat, and the other end of which is provided with a connector, which is rotatably connected to the fixing lug;

[0014] The driving cylinder drives the bottom cover to open or close the retraction cavity.

[0015] In one embodiment, the retraction structure further includes a temperature sensor provided on the enclosure, one end of the temperature sensor passes through the enclosure and extends into the retraction cavity for detecting the temperature in the retraction cavity.

[0016] In one embodiment, the enclosure includes a first side wall and a second side wall that are oppositely disposed, and the first side wall and the second side wall are made of transparent glass;

[0017] The retraction structure also includes two curvature detectors, which are arranged on the fixed plate and are spaced apart and arranged in parallel with the first side wall and the second side wall. One curvature detector is arranged corresponding to the inlet and is electrically connected to the conveying assembly, and the other curvature detector is arranged corresponding to the outlet and is electrically connected to the heating furnace. The curvature detector is used to detect the degree of curvature of the heat shrink tube in the retraction cavity.

[0018] In one embodiment, each of the curvature detectors comprises:

[0019] an emitter connected to the fixing plate and located on a side of the first sidewall facing away from the second sidewall; and

[0020] A receiving electrode is connected to the fixing plate and is located on a side of the second side wall facing away from the first side wall. The receiving electrode is arranged corresponding to the emitting electrode.

[0021] In one embodiment, the outer wall of the retraction box is provided with a mounting plate, and the conveying assembly comprises:

[0022] a driving member, the driving member being arranged on the mounting plate;

[0023] A driving shaft, the driving shaft passing through the retraction box and extending into the retraction cavity, the driving shaft being in transmission connection with the driving member;

[0024] A driven shaft, the driven shaft being disposed in the retraction chamber and spaced apart from the driving shaft; and

[0025] A conveyor belt is sleeved on the driving shaft and the driven shaft, and is used to convey the heat shrink tube in the retraction chamber from the inlet to the outlet.

[0026] In one embodiment, the conveying assembly further includes two guide assemblies disposed in the retraction chamber, one guide assembly being disposed adjacent to the inlet, and the other guide assembly being disposed adjacent to the outlet, the driving shaft and the driven shaft being located between the two guide assemblies, and each guide assembly comprising:

[0027] a connecting plate, one end of which is connected to the inner wall of the retraction cavity; and

[0028] A 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.

[0029] In one embodiment, the heating furnace comprises:

[0030] a furnace body, the furnace body being arranged in the retraction box and corresponding to the inlet, the furnace body being provided with the heating chamber and an inlet communicating with the heating chamber, the inlet being located at an end of the furnace body away from the retraction box; and

[0031] A conveying wheel is provided at the entrance, and the conveying wheel includes two rollers arranged opposite to each other, a conveying channel is formed between the two rollers, and the conveying channel is opposite to and connected to the entrance, and is used to convey the heat shrink tube into the entrance.

[0032] The heating and shaping device of the technical solution of the present invention connects the heating chamber of the heating furnace with the retraction chamber of the retraction box in the retraction structure, thereby realizing the series arrangement of the heating furnace and the retraction box, thereby performing secondary heating on the heat shrinkable tube before entering the expansion mold, which can eliminate or reduce the defect of unstable axial stretching 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 part of the conveying component in the retraction chamber of the retraction box, the conveying component is used to convey the heat shrinkable tube that has been heated by the heating furnace and entered the retraction chamber from the inlet to the outlet, so that the heat shrinkable tube is expanded through the expansion mold, thereby completing the processing and shaping of the heat shrinkable tube; further, the retraction structure can enable the heat shrinkable tube to be fully retracted and shaped in the retraction chamber before expansion, further eliminating or reducing the defect of unstable axial stretching rate of the heat shrinkable tube, thereby improving the stability of expansion production and improving the quality of the finished heat shrinkable tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0034] Figure 1 This is a schematic structural diagram of a heating and shaping device according to an embodiment of the present invention;

[0035] Figure 2 A schematic structural diagram of a heating and shaping device from another perspective in one embodiment of the present invention;

[0036] Figure 3 This is a perspective structural diagram of a retractable structure in one embodiment of the present invention;

[0037] Figure 4 A partial structural diagram of a retractable structure in one embodiment of the present invention;

[0038] Figure 5 A schematic diagram of a portion of the structure of the retractable structure in another perspective in one embodiment of the present invention;

[0039] Figure 6 This is a partial structural diagram of the retractable structure from another perspective in one embodiment of the present invention.

[0040] Description of Figure Numbers:

[0041]

[0042]

[0043] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] 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 an option in which both A and B are satisfied.

[0047] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not 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 such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The production process for heat shrink tubing involves masterbatch, extrusion, irradiation, expansion, and packaging. Expansion is the final step in the product's shaping. In related technologies, after repeated reeling and turnover in the series of steps prior to expansion, the original tube accumulates defects such as uneven axial stretch. Conventional heating methods during expansion are unable to eliminate this unstable axial stretch. These defects lead to unstable axial stretch in the finished product after expansion, resulting in product quality issues.

[0049] Based on the above concepts and problems, the present invention proposes a heating and shaping device 100. It can be understood that the heating and shaping device 100 is used for processing the heat shrink tube 4.

[0050] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, in an embodiment of the present invention, the heating and shaping device 100 includes a retraction structure 1, a heating furnace 2 and an expansion mold 3, wherein the retraction structure 1 includes a retraction box 11 and a conveying assembly 12, the retraction box 11 is provided with a retraction chamber 11a and an inlet 1111 and an outlet 1112 connected to the retraction chamber 11a, and part of the conveying assembly 12 is arranged in the retraction chamber 11a for conveying the heat shrink tube 4; the heating furnace 2 is arranged in the retraction box 11 and corresponding to the inlet 1111, the heating furnace 2 is provided with a heating chamber 211 connected to the inlet 1111, and the heating chamber 211 is used to preheat the heat shrink tube 4; the expansion mold 3 is arranged in the retraction box 11 and corresponding to the outlet 1112, and the expansion mold 3 is used to expand the heat shrink tube 4.

[0051] In this embodiment, the retraction box 11 of the retraction structure 1 is used to install, fix and support components such as the heating furnace 2, the expansion mold 3 and the conveying assembly 12. The structure of the retraction box 11 can be a box body, shell or box body structure with a cavity, which is not limited here.

[0052] As will be understood, the retraction box 11 has a retraction chamber 11a, which is used to reheat and reshape the heat shrink tubing heated by the heating furnace 2. To facilitate the entry of the heat shrink tubing from the heating furnace 2 into the retraction chamber 11a, the retraction box 11 is provided with an inlet 1111 communicating with the retraction chamber 11a. The heating furnace 2 is disposed within the retraction box 11 and is positioned corresponding to the inlet 1111. To facilitate the expansion and shaping of the heat shrink tubing within the retraction chamber 11a, which has undergone reheating and shrinkage, through the expansion mold 3, the retraction box 11 is provided with an outlet 1112 communicating with the retraction chamber 11a. The expansion mold 3 is disposed within the retraction box 11 and is positioned corresponding to the outlet 1112.

[0053] In this embodiment, the heating furnace 2 is provided with a heating chamber 211, which is connected to the retraction chamber 11a through the inlet 1111. It can be understood that the heating chamber 211 of the heating furnace 2 is used to preheat or preheat the heat shrink tube 4.

[0054] The heating and shaping device 100 of the present invention connects the heating chamber 211 of the heating furnace 2 with the retraction chamber 11a of the retraction box 11 in the retraction structure 1, thereby realizing the series arrangement of the heating furnace 2 and the retraction box 11, thereby performing secondary heating on the heat shrinkable tube 4 before entering the expansion mold 3, which can eliminate or reduce the defect of unstable axial elongation of the heat shrinkable tube 4 and improve the quality of the finished product of the heat shrinkable tube 4; at the same time, by arranging part of the conveying component 12 in the retraction chamber 11a of the retraction box 11, the conveying component 12 is used to convey the heat shrinkable tube 4 that enters the retraction chamber 11a from the inlet 1111 after being heated by the heating furnace 2 to the outlet 1112, so that the heat shrinkable tube 4 is expanded through the expansion mold 3, thereby completing the processing and shaping of the heat shrinkable tube 4; further, the retraction structure 1 can enable the heat shrinkable tube 4 to be fully retracted and shaped in the retraction chamber 11a before expansion, further eliminating or reducing the defect of unstable axial elongation of the heat shrinkable tube 4, thereby improving the stability of expansion production and improving the quality of the finished product of the heat shrinkable tube 4.

[0055] In one embodiment, if Figures 1 to 6 As shown, the retraction box 11 includes a fixed plate 111, a surrounding plate 112, a bottom cover 113 and a heating component 114. The fixed plate 111 and the bottom cover 113 are arranged on opposite sides of the surrounding plate 112 and enclose a retraction chamber 11a. The fixed plate 111 is provided with an inlet 1111 and an outlet 1112 that are spaced apart. The bottom cover 113 is rotatably connected to the surrounding plate 112 to open or close the retraction chamber 11a. The heating component 114 is arranged on the bottom cover 113 for heating the retraction chamber 11a.

[0056] In this embodiment, the fixed plate 111 and the bottom cover 113 can be selected as plate-like structures, and the surrounding plate 112 is a cylindrical or columnar structure with a cavity structure. The fixed plate 111 and the bottom cover 113 are arranged on opposite sides of the surrounding plate 112, that is, the fixed plate 111 and the bottom cover 113 are covered at the openings at both ends of the cavity structure of the surrounding plate 112, so that the fixed plate 111, the bottom cover 113 and the surrounding plate 112 enclose a retraction cavity 11a.

[0057] It can be understood that the fixed plate 111 is used to install, fix and support the heating furnace 2 and the expansion mold 3. The fixed plate 111 is provided with an inlet 1111 and an outlet 1112 connected to the retraction chamber 11a, and the inlet 1111 and the outlet 1112 are arranged at intervals. The heating component 114 is provided on the bottom cover 113 and is used to heat the retraction chamber 11a. Optionally, the heating component 114 can be a heating tube structure, a heating wire or a heating strip, etc., which is not limited here. The bottom cover 113 is rotatably connected to the enclosure 112 to open or close the retraction chamber 11a, which can facilitate the disassembly, replacement or maintenance of the heating component 114.

[0058] In one embodiment, if Figure 3 and Figure 4 As shown, the heating assembly 114 includes a heating tube 1141 and a tube cover 1142 . The heating tube 1141 is provided on a side of the bottom cover 113 facing the fixed plate 111 . The tube cover 1142 covers the heating tube 1141 and is connected to the bottom cover 113 .

[0059] In this embodiment, the tube cover 1142 is provided to protect the heating tube 1141 and also to prevent the heat shrink tube 4 in the retraction cavity 11a from falling onto the heating tube 1141 and causing combustion.

[0060] It is understood that the pipe cover 1142 can be a cover, box, or cover structure. The pipe cover 1142 can be fixed to the bottom cover 113 by welding or integral molding, which can improve the installation temperature resistance. Of course, the pipe cover 1142 can also be detachably mounted on the bottom cover 113 by snap-fit connection, plug-in connection, screw connection, or pin connection, which can facilitate the disassembly, replacement, or maintenance of the heating pipe 1141, thereby improving convenience.

[0061] In one embodiment, if Figures 1 to 6 As shown, the side of the fixed plate 111 facing the enclosing plate 112 is provided with heat insulation cotton 116. It can be understood that by providing the heat insulation cotton 116, the heat of the fixed plate 111 is effectively reduced, thereby facilitating the reduction of the temperature of the heat shrink tube 4 entering the expansion mold 3, thereby facilitating the expansion and shaping of the heat shrink tube 4.

[0062] In one embodiment, if Figure 1 and Figure 2 As shown, a fixing lug 1131 is provided on the side of the bottom cover 113 facing away from the fixed plate 111, and the retraction structure 1 also includes a fixing seat 131 and a driving cylinder 132, one end of the driving cylinder 132 is rotatably connected to the fixing seat 131, and the other end of the driving cylinder 132 is provided with a connecting head 133, which is rotatably connected to the fixing lug 1131; the driving cylinder 132 drives the bottom cover 113 to open or close the retraction chamber 11a.

[0063] In this embodiment, by providing a fixing seat 131 and a driving cylinder 132 , the driving cylinder 132 is utilized to realize that the bottom cover 113 automatically opens or closes the retraction cavity 11 a , thereby preventing the bottom cover 113 from scalding the user and improving safety.

[0064] In one embodiment, if Figure 1 、 Figure 3 、 Figure 5 and Figure 6 As shown, the retraction structure 1 further includes a temperature sensor 14 provided on the enclosure 112 , one end of the temperature sensor 14 passes through the enclosure 112 and extends into the retraction cavity 11 a for detecting the temperature in the retraction cavity 11 a .

[0065] It is understood that by providing the temperature sensor 14, the temperature within the retraction chamber 11a can be monitored in real time using the temperature sensor 14, thereby controlling the temperature within the retraction chamber 11a by controlling the operation of the heating tube 1141 in the heating assembly 114. In this embodiment, the heating and shaping device 100 further includes a controller, and the temperature sensor 14 and the heating tube 1141 are both electrically connected to the controller. In this way, the temperature sensor 14 can be used to feed back the monitored temperature within the retraction chamber 11a to the controller, thereby controlling the operation of the heating tube 1141 using the controller.

[0066] In one embodiment, if Figures 1 to 6 As shown, the enclosure 112 includes a first side wall 1121 and a second side wall 1122 that are oppositely arranged. The first side wall 1121 and the second side wall 1122 are made of transparent glass. The extension direction of the first side wall 1121 and the second side wall 1122 is the same as the line connecting the inlet 1111 and the outlet 1112.

[0067] In this embodiment, the enclosure 112 can be optionally configured as a quadrangular prism structure, and the enclosure 112 has a first side wall 1121 and a second side wall 1122 that are relatively arranged. By setting the first side wall 1121 and the second side wall 1122 to transparent glass, it is convenient to observe or monitor the shrinkage and shaping of the heat shrink tube 4 in the retraction chamber 11a through the first side wall 1121 and the second side wall 1122.

[0068] In one embodiment, if Figure 1 and Figure 2As shown, the retraction structure 1 also includes two curvature detectors 15, which are arranged on the fixed plate 111 and are spaced apart and arranged in parallel with the first side wall 1121 and the second side wall 1122. One curvature detector 15 is arranged corresponding to the inlet 1111 and is electrically connected to the conveying component 12, and the other curvature detector 15 is arranged corresponding to the outlet 1112 and is electrically connected to the heating furnace 2. The curvature detector 15 is used to detect the degree of bending of the heat shrink tube 4 in the retraction chamber 11a.

[0069] In this embodiment, a curvature detector 15 is provided to detect the degree of curvature of the heat shrinkable tube 4 within the retraction chamber 11a through the first side wall 1121 and the second side wall 1122, thereby controlling the feeding or discharging speed of the heat shrinkable tube 4 within the retraction chamber 11a to adjust or eliminate the defect of unstable axial elongation of the heat shrinkable tube 4. Optionally, the first side wall 1121 and the second side wall 1122 extend in the same direction as the line connecting the inlet 1111 and the outlet 1112. In this way, two curvature detectors 15 can be respectively provided corresponding to the inlet 1111 and the outlet 1112, thereby facilitating the detection of the degree of curvature of the heat shrinkable tube 4 exiting the inlet 1111 and the outlet 1112.

[0070] In one embodiment, if Figure 2 As shown, each curvature detector 15 includes an emitter 151 and a receiver 152. The emitter 151 is connected to the fixed plate 111 and is located on the side of the first side wall 1121 facing away from the second side wall 1122; the receiver 152 is connected to the fixed plate 111 and is located on the side of the second side wall 1122 facing away from the first side wall 1121. The receiver 152 is arranged corresponding to the emitter 151.

[0071] In this embodiment, the emitter 151 and the receiver 152 are symmetrically arranged on opposite sides of the enclosure 12, that is, the emitter 151 is located on the side of the first side wall 1121 facing away from the second side wall 1122, and the receiver 152 is located on the side of the second side wall 1122 facing away from the first side wall 1121. In this way, the signal emitted by the emitter 151 reaches the receiver 152 through the transparent first side wall 1121 and the second side wall 1122.

[0072] It can be understood that the two curvature detectors 15 are respectively used to detect the curvature of the heat shrink tube 4 at the inlet 1111 and the outlet 1112 in the retraction chamber 11a.

[0073] In this embodiment, the heat shrinkable tube 4 in the retraction chamber 11a has two free bending structures, namely corresponding to the inlet 1111 and the outlet 1112. By setting two curvature detectors 15 corresponding to the inlet 1111 and the outlet 1112 respectively, the height positions of the two free bending structures of the heat shrinkable tube 4 in the retraction chamber 11a can be detected, thereby realizing the bending degree detection.

[0074] In one embodiment, if Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the outer wall of the retraction box 11 is provided with a mounting plate 115, and the conveying assembly 12 includes a driving member 121, a driving shaft 122, a driven shaft 123 and a conveyor belt 124, wherein the driving member 121 is arranged on the mounting plate 115; the driving shaft 122 is passed through the retraction box 11 and extends into the retraction chamber 11a, and the driving shaft 122 is connected to the driving member 121 for transmission; the driven shaft 123 is arranged in the retraction chamber 11a and is spaced apart from the driving shaft 122; the conveyor belt 124 is sleeved on the driving shaft 122 and the driven shaft 123, and the conveyor belt 124 is used to transport the heat shrink tube 4 in the retraction chamber 11a from the inlet 1111 to the outlet 1112.

[0075] In this embodiment, the driving member 121 can be a drive motor, a drive motor, or a servo motor, etc., which is not limited here. The driving shaft 122 extends through the enclosure 112 of the retraction box 11, with one end extending into the retraction chamber 11a and the other end located outside the retraction box 11 and connected to the driving member 121. It is understood that the driving member 121 and the driving shaft 122 are connected by a belt drive. The driving shaft 122 is installed in the enclosure 112 via a bearing structure, so that the driving member 121 drives the driving shaft 122 to rotate.

[0076] It is understood that the driven shaft 123 can be inserted through the enclosure 112 of the retraction box 11, with one end extending into the retraction chamber 11a. The driven shaft 123 can also be completely disposed within the retraction chamber 11a, which is not limited here. In this embodiment, the driven shaft 123 is connected to the enclosure 112 of the retraction box 11 via a bearing structure, and the conveyor belt 124 is sleeved on the driving shaft 122 and the driven shaft 123. In this way, when the driving member 121 drives the driving shaft 122 to rotate, the conveyor belt 124 and the driven shaft 123 are driven to rotate, thereby allowing the conveyor belt 124 to realize the transmission of the heat shrink tube 4.

[0077] In one embodiment, if Figure 3 As shown, the conveying assembly 12 also includes two guide assemblies 125 arranged in the retraction chamber 11a, one guide assembly 125 is arranged adjacent to the inlet 1111, and the other guide assembly 125 is arranged adjacent to the outlet 1112, and the driving shaft 122 and the driven shaft 123 are located between the two guide assemblies 125.

[0078] In this embodiment, a guide component 125 is provided to guide the heat shrink tube 4 at the inlet 1111 or the outlet 1112, thereby preventing the heat shrink tube 4 from being offset or excessively bent during movement, thereby affecting the processing and production of the heat shrink tube 4 and the product quality.

[0079] In one embodiment, if Figure 3 As shown, each guide assembly 125 includes a connecting plate 1251 and a guide wheel 1252. One end of the connecting plate 1251 is connected to the inner wall of the retraction chamber 11a; the guide wheel 1252 is rotatably connected to the other end of the connecting plate 1251. The guide wheel 1252 is provided with a guide groove for accommodating the heat shrink tube 4.

[0080] In this embodiment, the connecting plate 1251 can be a U-shaped plate structure or two opposing plate structures. One end of the connecting plate 1251 is connected to the fixed plate 111, and the other end extends into the retraction cavity 11a. A guide wheel 1252 is rotatably connected to the connecting plate 1251 and has a guide groove for accommodating the heat shrink tube 4.

[0081] It can be understood that in order to adjust the position of the guide wheel 1252, multiple installation positions are set on the connecting plate 1251, and the multiple installation positions are arranged at intervals along the length direction of the connecting plate 1251. By adjusting the position of the guide wheel 1252 at the installation position on the connecting plate 1251, the position adjustment of the guide wheel 1252 can be achieved.

[0082] In one embodiment, if Figure 1 and Figure 2 As shown, the heating furnace 2 includes a furnace body 21 and a conveying wheel 22. The furnace body 21 is arranged in the retraction box 11 and is arranged corresponding to the inlet 1111. The furnace body 21 is provided with a heating chamber 211 and an inlet 212 connected to the heating chamber 211. The inlet 212 is located at the end of the furnace body 21 away from the retraction box 11; the conveying wheel 22 is provided at the inlet 212, and the conveying wheel 22 includes two rollers 221 arranged opposite to each other. A conveying channel 222 is formed between the two rollers 221, and the conveying channel 222 is opposite to and connected to the inlet 212, and is used to convey the heat shrink tube 4 to the inlet 212.

[0083] In this embodiment, the furnace body 21 can be optionally a cylindrical or columnar structure with a cavity, that is, the furnace body 21 has a heating chamber 211, one end of the furnace body 21 is connected to the inlet 1111 on the fixed plate 11 of the retraction box 11, and the other end of the furnace body 21 is formed with an inlet 212, so that the heat shrink tube 4 can conveniently enter the heating chamber 211 from the inlet 212 for preheating or pre-heating, enter the retraction chamber 11a through the inlet 1111, perform secondary heating and retraction shaping, and be transmitted to the outlet 1112 via the conveyor belt 124, and the outlet 1112 is led out by the guide assembly 125 to enter the expansion mold 3 for expansion and shaping.

[0084] It can be understood that in order to allow the heat shrink tube 4 to smoothly enter the heating chamber 211 from the inlet 212, a conveying wheel 22 is provided at the inlet 212. The conveying wheel 22 includes two rollers 221 arranged opposite to each other. Each roller 221 is provided with a groove. The two grooves enclose a conveying channel 222, that is, a conveying channel 222 is formed between the two rollers 221. The conveying channel 222 is opposite to and connected to the inlet 212, and is used to convey the heat shrink tube 4 into the inlet 212.

[0085] The curvature of the heat shrink tubing 4 within the retraction box 11 can be set for each specific heat shrink tubing 4 to achieve the optimal effect of reducing the instability of the incoming material's stretch rate. Maintaining this set curvature for continuous production can effectively reduce the quality issue of unstable axial stretch rate of the product. Due to fluctuations in incoming heat shrink tubing 4, the free curvature of the heat shrink tubing 4 will randomly fluctuate during the retraction and shaping process within the retraction box 11. To ensure stable production, this fluctuation must be controlled to keep the curvature within the set range.

[0086] As can be appreciated, by controlling the speed of the conveyor wheel 22 and the conveyor belt 124, two sets of free bending states can be formed within the retraction chamber 11a of the retraction box 11, ensuring that the heat shrink tubing 4 can fully retract in a highly elastic state. The bend between the heating furnace 2 and the conveyor belt 124 is defined as the first bend, and the bend between the conveyor belt 124 and the expansion mold 3 is defined as the second bend.

[0087] 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 15 corresponding to the inlet 1111. If the detection 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 pipe feeding speed of the conveying wheel 22 needs to be increased; if the detection 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 pipe feeding speed of the conveying wheel 22 needs to be reduced. The curvature detector 15 and the speed of the conveying wheel 22 form a closed-loop control to maintain dynamic balance.

[0088] The curvature of the second bend is kept under control by monitoring the height of the second bend through the curvature detector 15 corresponding to the outlet 1112. If the detection 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 124 needs to be increased; if the detection 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 124 needs to be reduced. The curvature detector 15 and the speed of the conveyor belt 124 form a closed-loop control to maintain dynamic balance.

[0089] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A heating and shaping device for heat shrink tubing processing, characterized in that: The heating and shaping device comprises: A retraction structure, comprising a retraction box and a conveying assembly, wherein the retraction box is provided with a retraction cavity and an inlet and an outlet communicating with the retraction cavity, and a portion of the conveying assembly is provided in the retraction cavity for conveying the heat shrink tubing; A heating furnace, the heating furnace being provided in the retraction box and corresponding to the inlet, the heating furnace being provided with a heating chamber communicating with the inlet, the heating chamber being used to preheat the heat shrink tubing; and An expansion mold, the expansion mold is arranged in the retraction box and corresponds to the outlet, and the expansion mold is used for expanding the heat shrink tube; The retraction box includes a fixed plate, a surrounding plate, a bottom cover, and a heating assembly. The fixed plate and the bottom cover are arranged on opposite sides of the surrounding plate and enclose the retraction chamber. The fixed plate is provided with the inlet and the outlet arranged at intervals. The bottom cover is rotatably connected to the surrounding plate to open or close the retraction chamber. The heating assembly is arranged on the bottom cover for heating the retraction chamber. The retraction structure further includes a temperature sensor provided on the enclosure, one end of the temperature sensor passes through the enclosure and extends into the retraction cavity, for detecting the temperature in the retraction cavity; The enclosure includes a first side wall and a second side wall that are oppositely arranged; The retraction structure also includes two curvature detectors, which are arranged on the fixed plate and are spaced apart and parallel to the first side wall and the second side wall. One curvature detector is arranged corresponding to the inlet and is electrically connected to the conveying assembly. The other curvature detector is arranged corresponding to the outlet and is electrically connected to the heating furnace. The curvature detector is used to detect the degree of bending of the heat shrink tube in the retraction cavity. Each curvature detector includes an emitter and a receiver. The emitter 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 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 is arranged corresponding to the emitter.

2. The heating and shaping device according to claim 1, characterized in that: The heating assembly includes a heating tube and a tube cover, wherein the heating tube is arranged on a side of the bottom cover facing the fixed plate, and the tube cover covers the heating tube and is connected to the bottom cover; And / or, heat insulation cotton is provided on the side of the fixing plate facing the enclosure.

3. The heating and shaping device according to claim 1, wherein: A fixing lug is provided on a side of the bottom cover facing away from the fixing plate, and the retractable structure further comprises: Mounting bracket; and A driving cylinder, one end of which is rotatably connected to the fixing seat, and the other end of which 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 retraction cavity.

4. The heating and shaping device according to claim 1, wherein: The first side wall and the second side wall are made of transparent glass.

5. The heating and shaping device according to any one of claims 1 to 4, characterized in that: The outer wall of the retraction box is provided with a mounting plate, and the conveying assembly comprises: a driving member, the driving member being arranged on the mounting plate; A driving shaft, the driving shaft passing through the retraction box and extending into the retraction cavity, the driving shaft being in transmission connection with the driving member; A driven shaft, the driven shaft being disposed in the retraction chamber and spaced apart from the driving shaft; and A conveyor belt is sleeved on the driving shaft and the driven shaft, and is used to convey the heat shrink tube in the retraction chamber from the inlet to the outlet.

6. The heating and shaping device according to claim 5, characterized in that: The conveying assembly further includes two guide assemblies disposed in the retraction chamber, one of the guide assemblies being disposed adjacent to the inlet, and the other being disposed adjacent to the outlet, the driving shaft and the driven shaft being located between the two guide assemblies, and each of the guide assemblies comprising: a connecting plate, one end of which is connected to the inner wall of the retraction cavity; and A 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.

7. The heating and shaping device according to any one of claims 1 to 4, characterized in that: The heating furnace comprises: a furnace body, the furnace body being arranged in the retraction box and corresponding to the inlet, the furnace body being provided with the heating chamber and an inlet communicating with the heating chamber, the inlet being located at an end of the furnace body away from the retraction box; and A conveying wheel is provided at the entrance, and the conveying wheel includes two rollers arranged opposite to each other, a conveying channel is formed between the two rollers, and the conveying channel is opposite to and connected to the entrance, and is used to convey the heat shrink tube into the entrance.

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