Electric wire heat shrink tube baking device
By using a U-shaped air outlet design and a rotating limiting cavity, the heat shrink tubing of the wire is circulated and blown from both the top and bottom, which solves the problem of uneven heating of the heat shrink tubing and improves the insulation performance and appearance quality of the wire.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN GU TOWNHONGLI WIRE ELECTRICAL APPLIANCE FACTORY CO
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-28
AI Technical Summary
Existing heat shrink tubing baking devices for electrical wires suffer from uneven heating in the circumferential or axial direction, leading to shrinkage wrinkles, localized overheating damage, or failure to adhere properly, which affects the insulation performance and appearance quality of the electrical wires.
The U-shaped air hood design forms a surrounding baking zone, with air vents spaced on the upper and lower sides of the baking zone. Combined with the movable gap and the rotation of the limiting cavity, it achieves bidirectional airflow around the heat shrink tubing, ensuring uniform hot air coverage.
It effectively reduces wrinkles and damage to heat shrink tubing, improves the uniformity of heat shrink tubing and the insulation performance of wires, and enhances appearance quality.
Smart Images
Figure CN224561912U_ABST
Abstract
Description
Technical Field
[0001] This utility model specifically relates to a baking device for heat shrink tubing. Background Technology
[0002] In the field of wire processing, heat shrink tubing is widely used in wire connection and terminal processing because it can provide insulation protection and joint sealing for wires. The installation of heat shrink tubing requires heating to shrink it and adhere it to the wire, thus necessitating a dedicated heating device. However, most existing heating devices have fixed air outlet structures (such as fixed nozzles or straight-tube air hoods), which can only heat a localized area of the heat shrink tubing. This leads to uneven heating circumferentially or axially, easily causing shrinkage wrinkles, localized overheating damage, or incomplete adhesion, affecting the insulation performance and appearance quality of the wire. Utility Model Content
[0003] In view of the defects of the existing technology, the technical problem to be solved by this utility model is to provide a wire heat shrink tubing baking device. A heating device for heat shrink tubing includes a base and an air outlet hood. A hot air pipe is mounted on the base, and the lower end of the hot air pipe has a limiting cavity with a downward opening. The limiting cavity has an arc-shaped cross-section. A connector with an upward opening is connected to the upper end of the air outlet hood. The connector is rotatably fitted within the limiting cavity. A clearance is provided between the hot air pipe and the air outlet hood to allow for relative swinging of the air outlet hood relative to the hot air pipe. The air outlet hood is U-shaped to form a heating zone on its inner side. Several [unclear symbols] are spaced apart on the upper and lower sides of the heating zone of the air outlet hood. The base has an air outlet, and a first movable seat and a second movable seat are movably mounted on it via a slide rail slider. Both the first and second movable seats can be moved towards the baking area, and the second movable seat can be accommodated within the baking area and has a positioning component on it. The first movable seat has a driving component that can drive the second movable seat to move back and forth. A transmission component that can drive the air outlet hood to swing as the second movable seat moves is provided between the air outlet hood and the second movable seat. The base has a cylinder, and the drive shaft of the cylinder is connected to the first movable seat.
[0004] In one embodiment, the positioning member includes a plurality of clamping structures spaced apart on the upper side of the second movable seat; wherein, the clamping structure includes two symmetrically arranged clamping arms, and the clamping arms can elastically deform relative to the second movable seat, and a ventilation groove is provided through the second movable seat between the front and rear clamping structures.
[0005] In one embodiment, the driving component includes a motor mounted on a first movable seat, a turntable mounted on the drive shaft of the motor, an eccentric shaft mounted on the turntable, a guide groove extending through the second movable seat, the eccentric shaft being movably mounted within the guide groove, and the length direction of the guide groove being perpendicular to the displacement direction of the first movable seat.
[0006] In one embodiment, the transmission component includes a connecting shaft disposed at the lower end of the air outlet cover, and the second movable seat has a protrusion on one side. A guide slope and a plane are sequentially connected to one side of the protrusion. The guide slope and the plane can press against the side wall of the connecting shaft respectively as the second movable seat moves.
[0007] In one embodiment, the connecting shaft is rotatably mounted on the air outlet shroud via a bearing.
[0008] In one embodiment, the hot air duct is equipped with an electric heating element and a fan.
[0009] In summary, the advantages of this utility model over the prior art are: This invention utilizes a U-shaped air hood with an inner circumferential baking zone. Air vents are spaced on both the upper and lower sides of the baking zone, enabling bidirectional airflow over the heat shrink tubing. This avoids the uneven heating caused by traditional single-sided airflow. Furthermore, the air hood's design, featuring a rotating fit between the connector and the hot air duct's arc-shaped limiting cavity with a clearance, allows it to swing relative to the hot air duct, ensuring that all areas of the heat shrink tubing are covered by hot air and effectively reducing defects such as wrinkles and damage. Attached image description; Figure 1 This is a perspective view of a wire heat shrink tubing baking device according to one embodiment of the present invention; Figure 2 This is a top view of a wire heat shrink tubing baking device in one embodiment of the present invention; Figure 3 As one embodiment of this utility model Figure 2 A schematic diagram of the AA cross-section; Figure 4 As one embodiment of this utility model Figure 2 BB cross-sectional diagram. Detailed Implementation
[0011] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1 to 4The present invention preferably provides a heating device for heat shrink tubing, including a base 1 and an air outlet hood 2. A hot air pipe 3 is provided on the base 1, and the lower end of the hot air pipe 3 has a limiting cavity 4 with a downward opening. The limiting cavity 4 has an arc-shaped cross-section. The upper end of the air outlet hood 2 is connected to a connector 5 with an upward opening. The connector 5 is rotatably fitted within the limiting cavity 4. A clearance is provided between the hot air pipe 3 and the air outlet hood 2 to allow the air outlet hood 2 to swing relative to the hot air pipe 3. The air outlet hood 2 is U-shaped so that its inner side forms a heating zone. The air outlet hood 2 has gaps between its upper and lower sides located within the heating zone. A plurality of air outlets 6 are provided separately. A first movable seat 7 and a second movable seat 8 are respectively movably arranged on the base 1 via a slide rail slider. Both the first movable seat 7 and the second movable seat 8 can be moved towards the baking area. The second movable seat 8 can be accommodated in the baking area and is provided with a positioning member 9. The first movable seat 7 is provided with a driving member 10 that can drive the second movable seat 8 to move back and forth. A transmission member 11 that can drive the air outlet hood 2 to swing with the displacement of the second movable seat 8 is provided between the air outlet hood 2 and the second movable seat 8. A cylinder 12 is provided on the base 1, and the drive shaft of the cylinder 12 is connected to the first movable seat 7.
[0012] Specifically, the wire with the heat shrink tubing attached is placed on the positioning component of the second movable seat. The positioning component secures the wire, ensuring the heat shrink tubing remains fixed within the baking area of the air outlet hood during baking. Then, a cylinder drives the first movable seat to move, causing the second movable seat to move with it and be positioned within the baking area of the air outlet hood. The drive mechanism then activates, causing the second movable seat to reciprocate along the slide rail (the travel distance is set according to the length of the heat shrink tubing, such as 50-200mm). Simultaneously, the transmission mechanism moves with the displacement of the second movable seat, causing the air outlet hood to swing around the connector within the limiting cavity. At this point, the hot air generator is activated, and hot air enters the limiting cavity through the hot air pipe, then flows through the connector into the air outlet hood, and finally exits from the air outlets on the upper and lower sides of the baking area, providing initial baking for the heat shrink tubing. Finally, the air outlet hood rotates within the arc-shaped limiting cavity of the connector and the hot air pipe, allowing for some play. The design allows it to swing relative to the hot air duct, ensuring that all areas around the heat shrink tubing are covered by hot air, effectively reducing defects such as wrinkles and damage.
[0013] Furthermore, the positioning component 9 includes several sets of clamping structures spaced apart on the upper side of the second movable seat 8; wherein, the clamping structure includes two symmetrically arranged clamping arms 13, and the clamping arms 13 can elastically deform relative to the second movable seat 8, and a ventilation slot 14 is provided through the second movable seat 8 between the front and rear clamping structures. Specifically, when the wire is pressed between the clamping arms of the two sets of clamping structures, the clamping arms generate radial clamping force due to elastic deformation, which stably fixes the wire (the magnitude of the clamping force can be adjusted by the thickness and material of the clamping arms to ensure that the wire does not shift or get damaged); during the baking process, some of the hot air blown out from the air outlet on the lower side of the air outlet can pass through the ventilation slot through the second movable seat and act on the heat shrink tubing area; at the same time, the ventilation slot can prevent the second movable seat from blocking the hot air, forming a three-dimensional baking effect of "top and bottom hot air + hot air circulation in the slot", further improving uniformity.
[0014] Furthermore, the driving component 10 includes a motor 15 mounted on the first movable seat 7. A turntable 16 is mounted on the drive shaft of the motor 15, and an eccentric shaft 17 is mounted on the turntable 16. A guide groove 18 is formed through the second movable seat 8, and the eccentric shaft 17 is movably disposed within the guide groove 18. The length direction of the guide groove 18 is perpendicular to the displacement direction of the first movable seat 7. Specifically, when the motor is started, the motor drive shaft drives the turntable to rotate around its center, and the eccentric shaft on the turntable performs a circular motion with the turntable. Because the eccentric shaft is confined within the guide groove, the radial component of the circular motion is constrained by the guide groove, and can only push the second movable seat laterally (along the length direction of the slide rail). When the turntable rotates one revolution, the eccentric shaft drives the second movable seat to complete one "reciprocating movement".
[0015] Furthermore, the transmission component 11 includes a connecting shaft 19 disposed at the lower end of the air outlet hood 2. The second movable seat 8 has a protrusion 20 on one side, and a guide slope 21 and a plane 22 are sequentially connected to one side of the protrusion 20. The guide slope 21 and the plane 22 can press against the side wall of the connecting shaft 19 as the second movable seat 8 moves. Specifically, when the second movable seat moves under the drive of the driving component, the guide slope of the protrusion gradually contacts and presses against the connecting shaft. Since the connecting shaft is fixed to the air outlet hood, the inclined structure of the guide slope will generate an upward component force on the connecting shaft, pushing the air outlet hood to swing upwards around the connecting head within the limiting cavity (the swing angle increases with the displacement of the second movable seat, such as swinging 10° when the displacement is 10mm, and swinging 20° when the displacement is 20mm). Furthermore, the connecting shaft 19 is rotatably mounted on the air outlet cover 2 via a bearing. Specifically, in traditional systems, the connecting shaft and the air outlet cover are fixedly connected, and when in contact with the guide slope or plane of the protrusion, there is sliding friction, which can easily lead to surface wear over long-term use. By using a bearing to enable the rotation of the connecting shaft, sliding friction is converted into rolling friction, reducing the coefficient of friction from 0.1-0.2 to 0.001-0.005, significantly reducing component wear and extending service life.
[0016] Furthermore, the hot air duct 3 is equipped with an electric heating element (not shown in the figure) and a fan (not shown in the figure). Specifically, the electric heating element and the fan are both relatively mature existing technologies, and their structural principles will not be described in detail here. The electric heating element is energized to heat the air to generate hot air, and then the fan blows the hot air out from the direction of the air outlet hood.
[0017] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A heat shrink tubing baking device, comprising a base (1) and an air vent (2), characterized in that: The base (1) is provided with a hot air pipe (3), and the lower end of the hot air pipe (3) has a limiting cavity (4) with a lower opening. The limiting cavity (4) has an arc-shaped cross-section. The upper end of the air outlet hood (2) is connected to a connector (5) with an upper opening. The connector (5) is rotatably fitted in the limiting cavity (4). A gap is left between the hot air pipe (3) and the air outlet hood (2) to allow the air outlet hood (2) to swing relative to the hot air pipe (3). The air outlet hood (2) is U-shaped so that its inner side forms a baking area. Several air outlet holes (6) are spaced apart on the upper and lower sides of the air outlet hood (2) located in the baking area. The base (1) is slid by a slide rail. The block is movably provided with a first movable seat (7) and a second movable seat (8). Both the first movable seat (7) and the second movable seat (8) can be moved towards the baking area. The second movable seat (8) can be accommodated in the baking area and is provided with a positioning component (9). The first movable seat (7) is provided with a driving component (10) that can drive the second movable seat (8) to move back and forth. The air hood (2) and the second movable seat (8) are provided with a transmission component (11) that can drive the air hood (2) to swing with the displacement of the second movable seat (8). The base (1) is provided with a cylinder (12). The drive shaft of the cylinder (12) is connected to the first movable seat (7).
2. The wire heat shrink tubing baking device according to claim 1, characterized in that: The positioning component (9) includes several sets of clamping structures arranged at intervals on the upper side of the second movable seat (8); wherein, the clamping structure includes two symmetrically arranged clamping arms (13), and the clamping arms (13) can elastically deform relative to the second movable seat (8), and a ventilation groove (14) is provided on the second movable seat (8) between the front and rear clamping structures.
3. The wire heat shrink tubing baking device according to claim 1, characterized in that: The driving component (10) includes a motor (15) mounted on a first movable seat (7). A turntable (16) is mounted on the drive shaft of the motor (15). An eccentric shaft (17) is mounted on the turntable (16). A guide groove (18) is provided through the second movable seat (8). The eccentric shaft (17) is movably mounted in the guide groove (18). The length direction of the guide groove (18) is perpendicular to the displacement direction of the first movable seat (7).
4. The wire heat shrink tubing baking device according to claim 1, characterized in that: The transmission component (11) includes a connecting shaft (19) disposed at the lower end of the air outlet hood (2). The second movable seat (8) has a protrusion (20) on one side. A guide slope (21) and a plane (22) are connected in sequence on one side of the protrusion (20). The guide slope (21) and the plane (22) can press against the side wall of the connecting shaft (19) respectively as the second movable seat (8) moves.
5. The wire heat shrink tubing baking device according to claim 4, characterized in that: The connecting shaft (19) is rotatably mounted on the air outlet cover (2) via a bearing.
6. The wire heat shrink tubing baking device according to claim 1, characterized in that: The hot air pipe (3) is equipped with an electric heating element and a fan.