Automatic thermal shrinkage mechanism for double-sided character identification thermal shrinkage sleeve

Abstract

The utility model provides an automatic thermal shrinkage mechanism for a double-sided character identification thermal shrinkage sleeve, which is characterized in that a clamping cylinder of a positioning thermal insulation component is fixed on a cylinder fixing plate of a bracket, and the clamping cylinder is connected with a clamping jaw and a pneumatic jaw; a sliding block of the thermal shrinkage assembly is fixed to the upper end of a support, a sliding rail and the sliding block are connected in a matched mode to form a kinematic pair, the sliding rail is fixed to a guide rail fixing plate of the support, and a fan is fixed above a heating pipe. The air guide nozzle is fixed below the heating pipe, and air outlets in the two sides of the air guide nozzle are symmetrically arranged on the two sides of the clamping jaw with the center of the air jaw as the symmetry center. According to the product, through cooperative arrangement of the positioning heat insulation assembly and the thermal shrinkage assembly, precise thermal shrinkage of the two sides of the double-sided character identification thermal shrinkage sleeve is achieved, and the thermal shrinkage accuracy is high; the influence on characters printed on the other two surfaces of the heat shrink tube is small, and the heat shrink quality is good. Furthermore, the on-line full-automatic thermal shrinkage of the thermal shrinkage pipes with different pipe diameters, different lengths and single-side and double-side identification characters can be realized, the adaptability to various types of working conditions is good, and popularization and application are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire harness processing equipment, and in particular relates to an automatic heat shrink mechanism for a double-sided character identification heat shrink sleeve. Background Art

[0002] Heat shrink tubing refers to a type of tubing used on wiring harnesses, which insulates, protects cables or terminals, and identifies cables. When used to identify cables, the heat shrink tubing needs to print the identification characters of the device connected to the cable end. In some applications, the cable number itself needs to be printed to facilitate wiring, management, and maintenance. The printing arrangement of identification characters on heat shrink tubing is generally divided into single-line printing, multi-line printing of more than two lines, and double-sided printing. Among them, double-sided printing characters generally mark the cable number and the cable end point number on both sides of the heat shrink tubing, which is easy to read. This type of identification can be used for electrical cabinets on large equipment. One difficulty in using heat shrink tubing with double-sided printing characters as cable identification is that the heat shrink tubing needs to ensure that the deformation of the fonts on both sides is consistent when it is heat-shrinked, and it needs to be controlled within the range specified by the standard; manual work is usually used now, which has low production efficiency, a certain deviation in the consistency of the characters after heat shrinking, and is difficult to cooperate with the production of automated wiring harness equipment. Utility Model Content

[0003] The utility model provides an automatic heat shrink mechanism for a double-sided character identification heat shrink sleeve, which can effectively solve the above problem.

[0004] The utility model is achieved in this way:

[0005] An automatic heat shrink mechanism for a double-sided character heat shrink sleeve, comprising a frame, a positioning heat insulation component and a heat shrink component, wherein the positioning heat insulation component is provided with a clamping cylinder, an air claw and a clamping claw, wherein the clamping cylinder is fixed to the frame, the air claw is connected to the clamping cylinder, and the clamping claw is arranged at the front end of the air claw; the heat shrink component is provided with a bracket, a first slider, a first slide rail, a mounting seat, a heat shrink cylinder and a heat shrink tube, wherein the bracket is fixed to the frame on one side of the positioning heat insulation component, the first slider is fixed to the upper end of the bracket, the first slide rail is connected to the first The slider is connected, the mounting seat is fixed on the first slide rail, the heat shrink cylinder is fixed on the bracket and linked with the mounting seat connecting plate, the heat shrink tube is arranged above the clamp and fixed with the mounting seat; the heat shrink tube is provided with a heating tube, a fan and an air guide nozzle, the heating tube is fixed to the mounting seat, the fan is connected to the upper port of the heating tube, the air guide nozzle is connected to the lower port of the heating tube, the air guide nozzle is a "Y"-shaped pipe, the inner side of the "V" tube of the "Y"-shaped pipe is provided with an air outlet, and the "V"-shaped tube is provided with a screw-type thermocouple.

[0006] As a further improvement, the clamping jaws on the air gripper are parallel and in a straight line.

[0007] As a further improvement, the clamping jaw is provided with an upper clamping block and a lower clamping plate, the upper clamping block is provided with a clamping groove, and the lower clamping plate is a "V"-shaped clamping plate, which is embedded in the clamping groove for clamping; the air clamp is provided with an elastic lever, the elastic lever is arranged on the rear side of the clamping jaw, and the initial state of the elastic lever is higher than the upper clamping block and the lower clamping plate respectively.

[0008] As a further improvement, a support assembly is provided in front of the positioning and heat insulation assembly, and the support assembly is arranged on the relatively lower side of the heat shrink tube. The support assembly is provided with a mounting plate, a telescopic cylinder and a support frame. The telescopic cylinder is connected to the frame through the mounting plate, and the support frame is connected to the telescopic cylinder, and the support frame is in a "Y" shape.

[0009] As a further improvement, baffles are provided on both sides of the clamping jaws.

[0010] As a further improvement, the positioning insulation component or the heat shrink component or the positioning insulation component and the heat shrink component are respectively provided with a horizontal adjustment component connected to the frame to achieve adjustment of the front and rear position of the positioning insulation component or the heat shrink component.

[0011] As a further improvement, the horizontal adjustment component is provided with a second slide rail, a second slider and a driving unit, the second slide rail is arranged on the frame, the second slider is connected to the second slide rail, the positioning insulation component or the heat shrinkage component is respectively arranged on the second slider of different horizontal adjustment components, and the driving unit is fixed on the frame and linked with the second slider.

[0012] As a further improvement, the driving unit is a driving cylinder or an electric push rod.

[0013] As a further improvement, the driving unit is provided with a servo motor, a gear and a rack, the servo motor is fixed on the frame, the gear is arranged on the rotating shaft of the servo motor, the rack is fixed on the second slider, and the gear is meshed with the rack.

[0014] As a further improvement, the level adjustment assembly is also provided with a positioning sensor.

[0015] As a further improvement, a protective cover is provided in front of the heat shrink tube and is fixedly connected to the frame; and a heat insulation board is provided between the heating tube and the fan.

[0016] The beneficial effects of the utility model are as follows: the product realizes accurate heat shrinkage of both sides of the double-sided character heat shrink tubing through the coordinated arrangement of the positioning heat insulation component and the heat shrink component, and the heat shrinkage accuracy is high; the characters printed on the other two sides of the heat shrink tubing are less affected, and the heat shrinkage quality is good. Furthermore, the heat shrinkage direction of the tubing can be automatically adjusted, and the heat shrinkage position can be adjusted to realize heat shrinkage processing of tubings of different models and lengths, which is conducive to the promotion and application of the product.

[0017] The device has a novel design. It is used in fully automatic wire harness processing equipment to realize online automatic heat shrinkage of the casing. For the heat shrinkage of casing with identification characters, no matter whether the character identification is single-sided or double-sided, the heat shrinkage process can ensure that the deformation of each character on the casing is consistent, and the deformation is controlled within a very small range that is completely acceptable to users; it can adapt to casings of different diameters; casings with lengths within the specified range can be automatically heat shrunk on this mechanism. This mechanism, in conjunction with the automatic production line, is much more efficient than manual work and can ensure the consistency of the processed products. In related industries, this mechanism can meet the needs of most customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of an automatic heat shrink mechanism for a double-sided character identification heat shrink sleeve of the utility model;

[0020] Figure 2 It is another schematic diagram of an embodiment of an automatic heat shrink mechanism for a double-sided character identification heat shrink sleeve of the utility model;

[0021] Figure 3 It is a schematic diagram from another perspective of an embodiment of an automatic heat shrink mechanism for a double-sided character identification heat shrink sleeve of the utility model;

[0022] Figure 4 It is a schematic diagram of a positioning and heat-insulating component of an automatic heat-shrinking mechanism for a double-sided character-marking heat-shrinkable sleeve according to the utility model;

[0023] Figure 5 It is a schematic diagram of the overall structure of an embodiment of an automatic heat shrink mechanism for a double-sided character identification heat shrink sleeve of the utility model;

[0024] Figure 6 This is a heat shrink process flow chart of a heat shrink device for a double-sided marking sleeve in some embodiments of the present application.

[0025] Reference numerals:

[0026] Frame 1; positioning and heat-insulating assembly 2; clamping cylinder 21; air claw 22; clamping claw 23; upper clamping block 231; clamping groove 2311; lower clamping plate 232; "V"-shaped clamping plate 2321; elastic lever 24; baffle 25; heat shrink assembly 3; bracket 31; first slider 32; first slide rail 33; mounting seat 34; heat shrink cylinder 35; heat shrink tube 4; heating tube 41; heat insulation board 411; fan 42; air guide nozzle 43; air outlet 44; screw-type thermocouple 45; protective cover 46; support assembly 5; mounting plate 51; telescopic cylinder 52; support frame 53; horizontal adjustment assembly 6; second slide rail 61; second slider 62; drive unit 63; servo motor 631; gear 632; rack 633; ​​positioning sensor 64. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0028] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying 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 one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present invention, the terms "upper", "middle", "side", "side", "upper side", "end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] This device is mainly used for automatic heat shrinking of casings with identification fonts on both sides. In order to facilitate identification after the wiring harness is installed, the identification fonts are directional, so that they are easy to view. The difficulty of automatic online heat shrinking of casings with identification fonts on both sides is that it is necessary to ensure that the casing is completely shrunk on the wire while the fonts on the same side and on different sides can be consistent, that is, the font is within the allowable deformation range, the font change amount in the same casing and the same batch of casings with the same specifications must be consistent, and the font size style (character height and character width ratio) must not change too obviously.

[0031] The device mainly includes a positioning and heat-insulating component 2, a heat-shrinking component 3, a supporting component 5, a horizontal adjustment component 6 and other related parts; it can realize online automatic heat shrinkage of sleeves with different diameters, single-sided markings, and especially double-sided markings, without any manual intervention. The heat-shrinking component uses hot air from both sides (or left and right sides), the nozzle moves back and forth for heat shrinkage (non-fixed), and the design of the nozzle with a special structure can minimize the impact of hot air on the marking characters on the sleeve (characters are on the top and bottom), ensuring that the sleeve can be completely shrunk onto the wire while the font deformation is consistent and within the required range. The positioning and heat-insulating component in the device plays a role in positioning the wire and ensuring that it is straight, which avoids the problem of different font deformation on the sleeve after heat shrinkage due to different wire postures; at the same time, the hot air baffle on the component can block the hot air from the nozzle, prevent the hot air from blowing directly to the terminal, and protect the terminal from being directly heated and deformed.

[0032] Reference Figure 1-5 As shown, an automatic heat shrink mechanism for a double-sided identification character heat shrink tubing comprises a frame 1, a positioning and heat insulation component 2 and a heat shrink component 3, wherein the positioning and heat insulation component 2 is provided with a clamping cylinder 21, an air claw 22 and a clamping claw 23, wherein the clamping cylinder 21 is fixed to the frame 1, the air claw 22 is connected to the clamping cylinder 21, and the clamping claw 23 is arranged at the front end of the air claw 22; the heat shrink component 3 is provided with a bracket 31, a first slider 32, a first slide rail 33, a mounting seat 34, a heat shrink cylinder 35 and a heat shrink tube 4, wherein the bracket 31 is fixed to the frame 1 on one side of the positioning and heat insulation component 2, the first slider 32 is fixed to one side of the bracket 31, the first slide rail 33 is connected to the first The slider 32 is connected, the mounting seat 34 is fixed on the first slide rail 33, the heat shrink cylinder 35 is fixed on the bracket 31 and linked with the mounting seat 34 through a connecting plate, the heat shrink tube 4 is arranged above the clamp 23 and fixed to the mounting seat 34; the heat shrink tube 4 is provided with a heating tube 41, a fan 42 and an air guide nozzle 43, the heating tube 41 is fixed to the mounting seat 34, the fan 42 is connected to the upper end of the heating tube 41, the air guide nozzle 43 is connected to the lower end of the heating tube 41, the air guide nozzle 43 is a "Y"-shaped pipe, and an air outlet 44 is provided on the opposite inner side of the "V"-shaped pipe of the "Y"-shaped pipe, and a screw-type thermocouple 45 is provided on the "V"-shaped pipe.

[0033] The clamping cylinder 21 of the positioning heat insulation component 2 is fixed to the cylinder fixing plate of the bracket 31, the connecting rod is connected to the air claw 22, and the connecting rod connects the clamping claw 23 and the air claw 22; the first slider 32 of the heat shrink component 3 is fixed to the upper end of the bracket 31, the first slide rail 33 is connected with the first slider 32 to form a kinematic pair, the first slide rail 33 is fixed to the guide rail fixing plate of the bracket 31, the first guide rail 33 fixing plate is installed with a fixing block, the mounting sleeve is fixed to the fixing block through the heat insulation board, the heating tube is fixed to the mounting sleeve through the limiting ring of the heating tube 41, and the heat insulation board, fan seat and fan 42 are fixed above the mounting sleeve in sequence; the air guide nozzle 43 is fixed below the mounting sleeve, and the air outlets 44 on both sides thereof are symmetrically arranged on both sides of the clamping claw 23 with the center of the air claw 22 as the symmetry center; the cylinder fixing plate fixes the heat shrink cylinder 35 of the heating tube assembly and is connected to the bracket 31.

[0034] The positioning and heat-insulating assembly 2 is used to fix the front end of the wiring harness that needs heat shrinkage processing. It is clamped by the clamping claws 23 and the logo surface is located on the upper and lower sides to prevent the heat sealing on both sides from shrinking the logo surface and causing font deformation.

[0035] The function of the heat shrink assembly 3 is to generate hot air, and heat the two sides of the sleeve without marking through the air outlets 44 on both sides of the "V"-shaped pipe of the "Y"-shaped pipe, so that the sleeve and the cable are fixed by heat shrinking. The heat shrink cylinder 35 mainly plays a role in giving way to the preliminary work.

[0036] Furthermore, the clamping claws 23 on the air claws 22 are parallel and in a straight line.

[0037] The parallel clamping jaws 23 are directly clamped on the flat connecting plate of the wiring harness terminal, and the slightly offset terminal is straightened by clamping, so that the surfaces containing the logo are located on the upper and lower sides.

[0038] Furthermore, the clamping jaw 23 is provided with an upper clamping block 231 and a lower clamping plate 232, the upper clamping block 231 is provided with a clamping groove 2311, and the lower clamping plate 232 is a "V"-shaped clamping plate 2321, and the "V"-shaped clamping plate 2321 is embedded in the clamping groove 2311 for clamping; the air claw 22 is provided with an elastic lever 24, and the elastic lever 24 is arranged on the rear side of the clamping jaw 23, and the initial state of the elastic lever 24 is higher than the upper clamping block 231 and the lower clamping plate 232 respectively.

[0039] This type of clamping jaw 23 structure can better clamp the wire harness, and the "V"-shaped clamping plate 2321 can better clamp the circular wire harness port and prevent the terminal from being clamped flat. Through the embedded cooperation of the clamping groove 2311 and the "V"-shaped clamping plate 2321, it can clamp wire harness ports of different diameters, and has a wide range of uses. Before clamping, the terminal is adjusted by the elastic lever 24, and the elastic lever 24 first contacts the connecting plate surface of the terminal, thereby flattening it, and then the wire harness is fixed by the clamping jaw 23 so that the identification surface is located on the upper and lower surfaces to avoid deformation during heat shrinkage.

[0040] Furthermore, a support assembly 5 is provided in front of the positioning and heat insulation assembly 2. The support assembly 5 is provided on the relatively lower side of the heat shrink tube 4. The support assembly 5 is provided with a mounting plate 51, a telescopic cylinder 52 and a support frame 53. The telescopic cylinder 52 is connected to the frame 1 through the mounting plate 51, and the support frame 53 is connected to the telescopic cylinder 52. The support frame 53 is in a "Y" shape.

[0041] The function of the support component 5 is that after the wire harness is delivered to the position by the assembly line wire feeding tool, the wire harness will be bent. If the bent wire harness is directly heat-shrunk, the sleeve will also be bent after the heat shrinking is completed, which will also cause uneven heating and affect the heat shrinking effect. The wire harness is propped up by the support component 5 to make it horizontal, and then clamped by the positioning insulation component 2, and the two ends are fixed to keep the heat shrink end of the wire harness horizontal.

[0042] Furthermore, baffles 25 are provided on both sides of the clamping jaw 23 .

[0043] The baffle 25 is used to prevent the hot air on both sides of the air guide nozzle 43 from heating the head of the wire harness and damaging other structural parts.

[0044] Furthermore, at least one of the positioning insulation component 2 or the heat shrink component 3 is provided with a horizontal adjustment component 6 connected to the frame 1 to achieve adjustment of the front and rear positions of the positioning insulation component 2 or the heat shrink component 3 .

[0045] The setting of the horizontal adjustment component 6 can, on the one hand, adjust the clamping and heat shrinking positions forward and backward, and on the other hand, improve the uniformity of heating by moving the heat shrink component 3 forward and backward to avoid deformation of the sleeve caused by excessive concentrated heating.

[0046] Furthermore, the horizontal adjustment component 6 is provided with a second slide rail 61, a second slider 62 and a driving unit 63, the second slide rail 61 is arranged on the frame 1, the second slider 62 is connected to the second slide rail 61, the positioning insulation component 2 or the heat shrink component 3 is respectively arranged on the second slider 62 of different horizontal adjustment components 6, and the driving unit 63 is fixed on the frame 1 and linked with the second slider 62.

[0047] Furthermore, the driving unit 63 is a driving cylinder or an electric push rod.

[0048] Furthermore, the driving unit 63 is provided with a servo motor 631 , a gear 632 and a rack 633 , the servo motor 631 is fixed on the frame 1 , the gear 632 is provided on the rotating shaft of the servo motor 631 , the rack 633 is fixed on the second slider 62 , and the gear 632 is meshed with the rack 633 .

[0049] The use of servo motor 631 can control the moving distance more accurately.

[0050] Furthermore, the level adjustment assembly 6 is further provided with a positioning sensor 64. The positioning sensor 64 is provided with a shading sheet, a photoelectric bracket and a photoelectric switch, the photoelectric switch is mounted on the photoelectric bracket, and the shading sheet is arranged relative to the photoelectric switch.

[0051] The positioning sensor 64 can accurately determine the clamping position and heat shrinking position of the thermal insulation component 2 and the heat shrinking component 3, or determine the moving position.

[0052] Furthermore, a protective cover 46 is provided in front of the heat shrink tube 4 and is fixedly connected to the frame 1 ; and a heat insulation board 411 is provided between the heating tube 41 and the fan 42 .

[0053] The protective cover 46 prevents the staff from contacting the heat shrink tube 4 and causing burns. The heat insulation board 411 protects the fan 42.

[0054] The working process of an automatic heat shrink mechanism for a double-sided character heat shrink tubing is as follows:

[0055] 1) Turn on the equipment, all mechanisms are in the initial state, the horizontal adjustment component 6 drives the positioning insulation component 2 and the heat shrink component 3 to return to the rear end zero position respectively, the heat shrink cylinder 35 drives the heat shrink component to rise to the highest point, the telescopic cylinder 52 drives the support frame 53 to descend to the lowest point, and the clamping cylinder 21 drives the clamping claw 23 to be in the open state;

[0056] 2) The automatic conveying mechanism of the assembly line tooling conveys the wire into place, the telescopic cylinder 52 extends upward, the support frame 53 lifts the wire harness so that the wire harness is in a horizontal straight line, and the wire is initially guided to the clamping range of the air claw 22; the servo motor 631 of the positioning and heat insulation component 2 is synchronously adjusted to move, driving the positioning and heat insulation component 2 to move forward, so that the clamping claw 23 reaches the clamping end position of the wire harness. After the support frame 53 completes the supporting action, the clamping cylinder 21 moves, the air claw 22 closes, and the elastic lever 24 first contacts the terminal plane of the wire harness to flatten the terminal plane, the terminal at the wire end is clamped, the wire is guided, and the terminal is in a horizontal state, so that the mark on the heat shrink tubing is at the upper and lower sides, the air claw 22 is further closed, and the clamping claw 23 clamps the wire harness; the support component 5 is reset to make way for the entry of the heat shrink component 3;

[0057] 3) Control the horizontal adjustment component 6 of the heat shrink component 3 to move, push the heat shrink component 3 forward, so that the heat shrink tube 4 is located directly above the sleeve, the heat shrink cylinder 35 shrinks, the heat shrink tube 4 descends, the air outlet 44 is located on both sides of the sleeve, the heating tube 41 and the fan 42 are started, and the screw-type thermocouple 45 detects that the heat shrink temperature has been reached. In this process, the horizontal adjustment component 6 of the heat shrink component 3 is controlled to reciprocate until the sleeve is completely heat-shrunk, completing the heat shrink treatment of the entire sleeve;

[0058] 4) Turn off the heating tube 41 and the fan 42, reset the heat shrink assembly 3, open the clamping cylinder 21, reset the positioning insulation assembly 2, and send the assembly line to the next station.

[0059] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic heat shrink mechanism for a double-sided character heat shrink tubing, characterized in that: The heat shrinkable assembly comprises a frame, a positioning and heat insulation component and a heat shrinkable assembly, wherein the positioning and heat insulation component is provided with a clamping cylinder, an air claw and a clamping jaw, the clamping cylinder is fixed on the frame, the air claw is connected to the clamping cylinder, and the clamping jaw is arranged at the front end of the air claw; the heat shrinkable assembly is provided with a bracket, a first slider, a first slide rail, a mounting seat, a heat shrinkable cylinder and a heat shrinkable tube, the bracket is fixed on the frame on one side of the positioning and heat insulation component, the first slider is fixed to the upper end of the bracket, the first slide rail is connected to the first slider, the mounting seat is fixed to the first slide rail, the heat shrinkable cylinder is fixed to the bracket and is linked to the mounting seat through a connecting plate, the heat shrinkable tube is arranged above the clamping jaw and fixed to the mounting seat; the heat shrinkable tube is provided with a heating tube, a fan and an air guide nozzle, the heating tube is fixed to the mounting seat, the fan is connected to the upper port of the heating tube, the air guide nozzle is connected to the lower port of the heating tube, the air guide nozzle is a "Y"-shaped pipe, and an air outlet is arranged on the opposite inner side of the "V" tube of the "Y"-shaped pipe, and a screw-type thermocouple is arranged on the "V"-shaped tube.

2. The automatic heat shrink mechanism for double-sided heat shrink tubing with identification characters according to claim 1, characterized in that: The clamping claws on the air claws are parallel in a straight line.

3. The automatic heat shrink mechanism for a double-sided heat shrink tubing with identification characters according to claim 1, characterized in that: The clamping jaw is provided with an upper clamping block and a lower clamping plate, the upper clamping block is provided with a clamping groove, and the lower clamping plate is a "V"-shaped clamping plate, which is embedded in the clamping groove for clamping; the air claw is provided with an elastic lever, the elastic lever is arranged on the rear side of the clamping jaw, and the initial state of the elastic lever is higher than the upper clamping block and the lower clamping plate respectively.

4. The automatic heat shrink mechanism for double-sided character heat shrink tubing according to claim 1, characterized in that: A support assembly is provided in front of the positioning and heat-insulating assembly, and the support assembly is provided on the lower side relative to the heat shrink tube. The support assembly is provided with a mounting plate, a telescopic cylinder and a support frame. The telescopic cylinder is connected to the frame through the mounting plate, and the support frame is connected to the telescopic cylinder, and the support frame is in a "Y" shape.

5. The automatic heat shrink mechanism for a double-sided character identification heat shrink tubing according to claim 1, 2 or 3, characterized in that: Baffles are arranged on both sides of the clamping jaws.

6. The automatic heat shrink mechanism for double-sided heat shrink tubing with identification characters according to claim 1, characterized in that: The positioning heat insulation component or the heat shrink component or the positioning heat insulation component and the heat shrink component are respectively provided with a horizontal adjustment component connected to the frame to achieve the adjustment of the front and rear position of the positioning heat insulation component or the heat shrink component; the horizontal adjustment component is provided with a second slide rail, a second slider and a driving unit, the second slide rail is arranged on the frame, the second slider is connected to the second slide rail, the positioning heat insulation component or the heat shrink component is respectively arranged on the second slider, and the driving unit is fixed on the frame and linked to the second slider.

7. The automatic heat shrink mechanism for double-sided character identification heat shrink tubing according to claim 6, characterized in that: The driving unit is a driving cylinder or an electric push rod.

8. The automatic heat shrink mechanism for double-sided character identification heat shrink tubing according to claim 6, characterized in that: The driving unit is provided with a servo motor, a gear and a rack. The servo motor is fixed on the frame, the gear is arranged on the rotating shaft of the servo motor, the rack is fixed on the second sliding block, and the gear is meshed with the rack.

9. The automatic heat shrink mechanism for double-sided character identification heat shrink tubing according to claim 6, characterized in that: The level adjustment assembly is also provided with a positioning sensor.

10. The automatic heat shrink mechanism for double-sided character identification heat shrink tubing according to claim 1, characterized in that: A protective cover is arranged in front of the heat shrink tube, and the protective cover is fixedly connected to the frame; a heat insulation board is arranged between the heating tube and the fan.

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