Automatic tensioning device for heat-shrinkable sleeves

Abstract

The utility model relates to the field of gas discharge lamp production equipment, concretely relates to a kind of heat shrinkable sleeve automatic tensioning device, by setting the two ends of clamping component fixed heat shrinkable sleeve, control axial heat shrinkable sleeve axial extension. Counterweight component realizes constant, even axial tensioning to heat shrinkable sleeve by the gravity of counterweight block, solve the problem that traditional manual tensioning force fluctuation is not even and is easy to wrinkle. Servo drive device drives transmission screw rod rotation, to drive hot air cylinder along the axial movement of lamp, when hot air cylinder is moved at constant speed from lamp head position to lamp tail position, the heat shrinkable sleeve is attached to the heat shrinkable sleeve on the wall of lamp tube and is completed. The action sequence of first clamping component, second clamping component, servo drive device and hot air cylinder is coordinated by control unit, realize whole process automation control. Solve the problem that tensioning force is difficult to keep uniform in the process of traditional lamp tube sleeve heat shrinkable sleeve, and the shrinkage of heat shrinkable sleeve is not even, affect quality and the problem of low production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of gas discharge lamp production equipment, and in particular to an automatic tensioning device for heat shrink tubing. Background Technology

[0002] Gas discharge lamps include fluorescent lamps and ultraviolet lamps. In applications such as electronics factories or food production workshops, where environmental cleanliness and mercury contamination are extremely sensitive, accidental breakage of ordinary lamps leading to phosphor or mercury leakage can cause serious accidents, with complex and costly follow-up procedures. Therefore, for these lamps used in special environments, a transparent heat-shrink tubing must be wrapped around the outer wall of the lamp to ensure that even in the event of accidental breakage, broken glass, phosphor, and mercury inside the tube are contained within this thin film and prevent leakage.

[0003] Because heat shrink tubing exhibits a phenomenon where it elongates axially when heated and contracts radially, longer tubing is prone to wrinkling if no radial tension is applied during the heat shrinking process, affecting the appearance and performance of the finished product. Therefore, lamp manufacturers typically require 2-3 workers to complete the heat shrinking process for lamps longer than 60cm. Due to manual operation, it is difficult to maintain uniform tension, leading to uneven shrinkage of the heat shrink tubing and impacting quality. Furthermore, manual operation results in low production efficiency, high labor intensity for workers, and is time-consuming and labor-intensive.

[0004] Therefore, there is an urgent need for an automatic tensioning device for heat shrink tubing that can improve the quality of finished products and production efficiency. Utility Model Content

[0005] To address the problem that maintaining uniform tension is difficult during the traditional process of installing heat shrink tubing on lamp tubes, which easily leads to uneven shrinkage of the heat shrink tubing, affecting quality and reducing production efficiency.

[0006] This utility model provides an automatic tensioning device for heat shrink tubing, including a worktable with a lamp tube on it and a heat shrink tubing around the lamp tube. It also includes a clamping assembly, a heating assembly, a counterweight assembly, and a control unit disposed on the worktable. The clamping assembly includes a slide rail, with a first clamping assembly and a second clamping assembly slidably connected to the slide rail. The first clamping assembly has a positioning element for fixing it to the slide rail. The heating assembly includes a servo drive device, a transmission screw, and a hot air cylinder. The servo drive device is fixedly connected to the side of the worktable near the first clamping assembly, and the output end of the servo drive device and one end of the transmission screw are fixedly connected to it. The hot air tube is fixedly connected to the transmission screw; the counterweight assembly includes a steel wire rope, a counterweight support, and a counterweight block. One end of the steel wire rope is fixedly connected to the rear slider, and the other end of the steel wire rope is connected to the counterweight support. The counterweight support is used to place the counterweight block, which is located on the side of the worktable away from the first clamping member. The control unit is electrically connected to the first clamping assembly, the second clamping assembly, the servo drive device, and the hot air tube, respectively. The heat shrink tubing is clamped and fixed by the first clamping assembly and the second clamping assembly at both ends. The transmission screw and the slide rail both extend along the axial direction of the lamp tube, and the length of the slide rail and the length of the transmission screw are both greater than the length of the heat shrink tubing.

[0007] Preferably, the first clamping assembly includes a front slider and a front clamping cylinder. The front slider is slidably connected to the slide rail. The positioning element is a locking bolt, which is threadedly connected to the positioning element. The telescopic rod end of the front clamping cylinder is provided with a front chuck for clamping the heat shrink tubing. The front clamping cylinder and the control unit are electrically connected. The second clamping assembly includes a rear slider and a rear clamping cylinder. The rear slider is slidably connected to the slide rail. The telescopic rod end of the rear clamping cylinder is provided with a rear chuck for clamping the heat shrink tubing. The rear clamping cylinder and the control unit are electrically connected.

[0008] Preferably, the slide rail is fixedly connected to a limiting seat, which is used to define the initial position of the first clamping component.

[0009] Preferably, the servo drive device is a stepper motor.

[0010] Preferably, the transmission screw is equipped with a duct seat, which is used to install a hot air duct.

[0011] Preferably, the counterweight assembly further includes a pulley seat, which is fixedly connected to the end of the worktable away from the first clamping assembly. The pulley seat is rotatably connected to a pulley, and the wire rope and the pulley are rolled together.

[0012] Preferably, the counterweight assembly further includes a support for receiving the counterweight support, the support being fixedly connected to the bottom of the workbench on the side near the counterweight block.

[0013] Preferably, the heating assembly further includes a heightening side plate and a lead screw tail plate. The heightening side plate is located on both sides of the worktable. The servo drive device is connected to the heightening side plate near the first clamping member. The lead screw tail plate is located on the heightening side plate away from the first clamping member. The end of the lead screw away from the servo drive device is rotatably connected to the lead screw tail plate.

[0014] The beneficial effects of this invention are reflected in the fact that by setting clamping components to fix both ends of the heat shrink tubing and controlling the axial extension of the heat shrink tubing, the counterweight component achieves constant and uniform axial tension on the heat shrink tubing through the gravity of the counterweight blocks, solving the problem of uneven tension and wrinkling caused by traditional manual tensioning. The servo drive device drives the transmission screw to rotate, thereby driving the hot air gun to move along the axial direction of the lamp tube. When the hot air gun moves at a constant speed from the lamp head position to the lamp tail position, the entire heat shrink tubing is successfully attached to the lamp tube wall. The control unit coordinates the action sequence of the first clamping component, the second clamping component, the servo drive device, and the hot air gun, realizing fully automated control of the process. With constant tension and uniform heating motion, it replaces the inefficient mode of traditional reliance on manual experience and cooperation, solving the problems of difficulty in maintaining uniform tension during the traditional lamp tube heat shrink tubing application process, which easily leads to uneven shrinkage of the heat shrink tubing, affecting quality and reducing production efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an automatic tensioning device for heat shrink tubing provided by this utility model.

[0016] Figure 2 The circuit connection block diagram of an automatic tensioning device for heat shrink tubing provided by this utility model.

[0017] In the diagram: 1-Clamping assembly; 11-Slide rail; 12-First clamping assembly; 121-Front slider; 122-Front clamping cylinder; 123-Front chuck; 124-Positioning component; 13-Second clamping assembly; 131-Rear slider; 132-Rear clamping cylinder; 133-Rear chuck; 14-Limit seat; 2-Heating assembly; 21-Servo drive device; 22-Transmission screw; 23-Hot air duct; 24-Air duct seat; 25-Heightening side plate; 26-Screw tail plate; 3-Counterweight assembly; 31-Wire rope; 32-Counterweight support; 33-Counterweight block; 34-Pulley seat; 341-Pulley; 35-Support; 4-Control unit; 5-Workbench; 6-Lamp tube; 7-Heat shrink tubing. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Reference Figures 1-2 An automatic tensioning device for heat shrink tubing includes a worktable 5, a lamp tube 6 on the worktable 5, and a heat shrink tubing 7 on the outer periphery of the lamp tube 6. It also includes a clamping assembly 1, a heating assembly 2, a counterweight assembly 3, and a control unit 4 disposed on the worktable 5. The clamping assembly 1 includes a slide rail 11, with a first clamping assembly 12 and a second clamping assembly 13 slidably connected to the slide rail 11. The first clamping assembly 12 has a positioning element 124 for fixing the first clamping assembly 12 to the slide rail 11. The heating assembly 2 includes a servo drive device 21, a transmission screw 22, and a hot air tube 23. The servo drive device 21 is fixedly connected to the side of the worktable 5 near the first clamping assembly 12, and the output end of the servo drive device 21 is fixedly connected to one end of the transmission screw 22. The air duct 23 is mounted on the transmission screw 22; the counterweight assembly 3 includes a wire rope 31, a counterweight support 32, and a counterweight block 33. One end of the wire rope 31 is fixedly connected to the rear slider 131, and the other end of the wire rope 31 is connected to the counterweight support 32. The counterweight support 32 is used to place the counterweight block 33, and the counterweight block 33 is located on the side of the workbench 5 away from the first clamping member; the control unit 4 is electrically connected to the first clamping assembly 12, the second clamping assembly 13, the servo drive device 21, and the hot air duct 23 respectively; wherein, the heat shrink tubing 7 is clamped and fixed by the first clamping assembly 12 and the second clamping assembly 13 at both ends. The transmission screw 22 and the slide rail 11 are both extended along the axial direction of the lamp tube 6. The length of the slide rail 11 and the length of the transmission screw 22 are both greater than the length of the heat shrink tubing 7.

[0020] The clamping assembly 1 fixes both ends of the heat shrink tubing 7 and controls its axial extension. The counterweight assembly 3 uses the gravity of the counterweight block 33 to achieve constant and uniform axial tension on the heat shrink tubing 7, solving the problem of uneven tension and wrinkling caused by traditional manual tensioning. The servo drive device 21 drives the transmission screw 22 to rotate, thereby moving the hot air tube 23 along the axis of the lamp. When the hot air tube 23 moves at a constant speed from the lamp head position to the lamp tail position, the heat shrink tubing 7 is completely attached to the wall of the lamp tube 6. The control unit 4 coordinates the action sequence of the first clamping assembly 12, the second clamping assembly 13, the servo drive device 21, and the hot air tube 23 to achieve fully automated control. With constant tension and uniform heating motion, it replaces the inefficient mode that relies on manual experience and cooperation, solving the problem that it is difficult to maintain uniform tension during the traditional lamp application of heat shrink tubing 7, which easily causes uneven shrinkage of the heat shrink tubing 7, affecting quality and reducing production efficiency.

[0021] As an explanation rather than a limitation, the material of the heat shrink tubing 7 can be a transparent and colorless polyolefin heat shrink material. The ratio of the radial shrinkage rate to the axial elongation rate of the polyolefin heat shrink material is 1:1.2 to 1:1.5. The weight of the counterweight 33 is dynamically adjusted according to the axial elongation rate of the heat shrink tubing 7 to ensure constant tension.

[0022] In some embodiments, the first clamping assembly 12 includes a front slider 121 and a front clamping cylinder 122. The front slider 121 is slidably connected to the slide rail 11. The positioning member 124 is a locking bolt, which is threadedly connected to the positioning member 124. The telescopic rod end of the front clamping cylinder 122 is provided with a front chuck 123, which is used to clamp the heat shrink tubing 7. The front clamping cylinder 122 is electrically connected to the control unit 4. The second clamping assembly 13 includes a rear slider 131 and a rear clamping cylinder 132. The rear slider 131 is slidably connected to the slide rail 11. The telescopic rod end of the rear clamping cylinder 132 is provided with a rear chuck 133, which is used to clamp the heat shrink tubing 7. The rear clamping cylinder 132 is electrically connected to the control unit 4.

[0023] The front clamping cylinder 122 and the rear clamping cylinder 132 receive commands from the control unit 4 and drive the front chuck 123 and the rear chuck 133 respectively to clamp, hold, and release the two ends of the heat shrink tubing 7. The front slider 121 is fixed to the slide rail 11 by the positioning member 124. When the heat shrink tubing 7 is heated and extends axially, the rear slider 131, under the traction of the wire rope 31 and the counterweight 33, provides a uniform tension force, causing the rear part of the heat shrink tubing 7 to gradually extend along the slide rail 11, while the counterweight support 32 and the counterweight 33 descend synchronously. This ensures that the heat shrink tubing 7 shrinks uniformly, so that the heat shrink tubing 7 is evenly and tightly attached to the lamp tube 6, resulting in an excellent finished product appearance.

[0024] In some embodiments, the slide rail 11 is fixedly connected to a limiting seat 14, which is used to define the initial position of the first clamping assembly 12.

[0025] The first clamping assembly 12 abuts against the limiting seat 14 to reserve space for axial extension during heat shrinking.

[0026] In some implementations, the servo drive 21 is a stepper motor.

[0027] The stepper motor drives the transmission screw 22 to achieve uniform axial movement of the hot air tube 23.

[0028] In some embodiments, the lead screw 22 is provided with a duct seat 24 for mounting the hot air duct 23.

[0029] When the servo drive device 21 drives the lead screw to rotate, the rotational motion of the lead screw is converted into linear motion along the axis of the lamp tube 6 by the air duct seat 24. This ensures that the hot air duct 23 can move according to the preset path and speed, without any deviation or shaking that would occur during manual operation.

[0030] In some embodiments, the counterweight assembly 3 further includes a pulley seat 34, which is fixedly connected to the end of the workbench 5 away from the first clamping assembly 12. The pulley seat 34 is rotatably connected to a pulley 341, and the wire rope 31 and the pulley 341 are rolled together.

[0031] By setting pulley seat 34 and pulley 341, the direction of force on wire rope 31 is changed and friction is reduced, thereby ensuring that the tension provided by counterweight 33 can be smoothly, efficiently and without loss transmitted to heat shrink tubing 7.

[0032] Preferably, the counterweight assembly 3 further includes a support 35 for receiving the counterweight support 32, the support 35 being fixedly connected to the bottom of the workbench 5 near the counterweight block 33.

[0033] By providing a support 35, the counterweight 33 is prevented from accidentally falling and injuring operators during shutdown or equipment debugging. Furthermore, it provides a platform for the counterweight 33, facilitating its replacement by operators. A cushioning pad is installed on the top of the support 35 to reduce wear on the counterweight 33.

[0034] In some embodiments, the heating assembly 2 further includes a heightening side plate 25 and a lead screw tail plate 26. The heightening side plate 25 is located on both sides of the worktable 5. The servo drive device 21 is connected to the heightening side plate 25 on the side closer to the first clamping member. The lead screw tail plate 26 is located on the heightening side plate 25 on the side away from the first clamping member. The end of the lead screw away from the servo drive device 21 is rotatably connected to the lead screw tail plate 26.

[0035] By setting up the heightening side plate 25, the working plane of the heating component 2 is raised, providing ample, interference-free operating space for the lamp tube 6, heat shrink tubing 7, and the movable hot air tube 23; ensuring that the hot air tube 23 can pass smoothly throughout the entire process without colliding with the worktable 5 or other components. By setting up the lead screw tail plate 26, the drooping, vibration, or even bending of the transmission lead screw 22 due to its own weight during rotation is prevented, making the operation of the transmission lead screw 22 more stable.

[0036] In the description of the embodiments of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.

[0037] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention. It will be clearly understood by those skilled in the art that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic tensioning device for heat shrink tubing, comprising a worktable, a lamp tube on the worktable, and a heat shrink tubing disposed around the outer periphery of the lamp tube, characterized in that: Also includes those set on the workbench: A clamping assembly includes a slide rail, on which a first clamping assembly and a second clamping assembly are slidably connected. The first clamping assembly is provided with a positioning element for fixing the first clamping assembly to the slide rail. The heating assembly includes a servo drive device, a transmission screw, and a hot air tube. The servo drive device is fixedly connected to the side of the worktable near the first clamping assembly. The output end of the servo drive device is fixedly connected to one end of the transmission screw, and the hot air tube is located on the transmission screw. The counterweight assembly includes a wire rope, a counterweight support, and a counterweight block. One end of the wire rope is fixedly connected to the rear slider, and the other end of the wire rope is connected to the counterweight support. The counterweight support is used to place the counterweight block, which is located on the side of the worktable away from the first clamping member. The control unit is electrically connected to the first clamping assembly, the second clamping assembly, the servo drive device, and the hot air tube, respectively. The heat shrink tubing is clamped and fixed by the first clamping component and the second clamping component at both ends. The transmission screw and the slide rail extend along the axial direction of the lamp tube. The length of the slide rail and the length of the transmission screw are both greater than the length of the heat shrink tubing.

2. The automatic tensioning device for heat shrink tubing according to claim 1, characterized in that: The first clamping assembly includes a front slider and a front clamping cylinder. The front slider is slidably connected to the slide rail. The positioning element is a locking bolt, which is threadedly connected to the positioning element. The telescopic rod end of the front clamping cylinder is provided with a front chuck for clamping heat shrink tubing. The front clamping cylinder and the control unit are electrically connected. The second clamping assembly includes a rear slider and a rear clamping cylinder. The rear slider is slidably connected to the slide rail. The telescopic rod end of the rear clamping cylinder is provided with a rear chuck for clamping heat shrink tubing. The rear clamping cylinder and the control unit are electrically connected.

3. The automatic tensioning device for heat shrink tubing according to claim 1, characterized in that: The slide rail is fixedly connected to a limiting seat, which is used to limit the initial position of the first clamping assembly.

4. The automatic tensioning device for heat shrink tubing according to claim 1, characterized in that: The servo drive device is a stepper motor.

5. The automatic tensioning device for heat shrink tubing according to claim 1, characterized in that: The transmission screw is equipped with a duct seat, which is used to install a hot air duct.

6. The automatic tensioning device for heat shrink tubing according to claim 1, characterized in that: The counterweight assembly also includes a pulley seat, which is fixedly connected to the end of the worktable away from the first clamping assembly. The pulley seat is rotatably connected to a pulley, and the wire rope and the pulley are rolled together.

7. An automatic tensioning device for heat shrink tubing according to claim 1 or 6, characterized in that: The counterweight assembly also includes a support for receiving the counterweight support, which is fixedly connected to the bottom of the workbench on the side near the counterweight block.

8. The automatic tensioning device for heat shrink tubing according to claim 1, characterized in that: The heating assembly also includes a heightening side plate and a lead screw tail plate. The heightening side plate is located on both sides of the worktable. The servo drive device is connected to the heightening side plate near the first clamping member. The lead screw tail plate is located on the heightening side plate away from the first clamping member. The end of the lead screw away from the servo drive device is rotatably connected to the lead screw tail plate.

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