A forward and reverse alternating rotation type heat shrink tube baking equipment for wire harness production

Abstract

The utility model discloses a kind of positive and negative alternate rotation type heat shrink tube baking equipment for wiring harness production, including the drying machine formed by chain conveyer and heater, still include positive and negative alternate rotation unit, can make single wiring harness in the heating cavity of the heater proceed positive and negative alternate rotation. Add positive and negative alternate rotation unit, through the positive and negative alternate rotation of wiring harness, the angle of each point on the surface of heat shrink tube can periodically switch towards heating source, effectively offset the temperature gradient in heating cavity, ensure that every region on heat shrink tube can evenly receive heat, avoid local overheating or under heating;Bidirectional disturbance generated by alternate rotation can promote air between heat shrink tube and wiring harness to discharge from multiple directions, simultaneously, heat shrink tube can more fully "wrap" wiring harness surface in alternate rotation, especially for thicker wiring harness or complex shape joint, can significantly reduce gap, improve sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of wire harness production technology, and in particular to a forward and reverse alternating rotary heat shrink tubing baking device for wire harness production. Background Technology

[0002] In the field of wire harness manufacturing, heat shrink tubing is widely used as an important insulation, protection, and marking material. Its working principle utilizes the "memory effect" of polymer materials; after heating, it can radially shrink, thus tightly wrapping around the joints, terminals, or specific sections of the wire harness, playing a crucial role in insulation, sealing, moisture protection, abrasion prevention, and mechanical fixation. The shrinkage quality of the heat shrink tubing directly determines the electrical safety and long-term environmental reliability of the wire harness product.

[0003] Currently, the industry commonly uses furnace-type dryers (also known as heat shrink ovens or hot air shrink ovens) for heat treatment when processing wire harness terminals with heat shrink tubing. This equipment typically includes a conveyor belt and a heater with a heating chamber. The operator places the wire harness directly onto the conveyor belt, which carries the wire harness at a constant speed through the high-temperature heating chamber. The hot air inside the chamber heats the heat shrink tubing, causing it to shrink.

[0004] In practical use, the heat shrink tubing cannot be heated evenly because the wire harness cannot rotate on the conveyor belt. This results in the heat shrink tubing failing to form a solid wrapping layer, and even gaps in some areas. This is especially true for the heat shrinking operation of thicker single wire harnesses, which seriously affects the insulation and sealing of the wire harness. Therefore, this application provides a forward and reverse alternating rotary heat shrink tubing baking device for wire harness production to meet the requirements. Utility Model Content

[0005] The purpose of this application is to provide a forward and reverse alternating rotary heat shrink tubing baking device for wire harness production, which solves the technical problems mentioned in the background above.

[0006] To achieve the above objectives, this application provides the following technical solution: a heat shrink tubing baking device for wire harness production, comprising a dryer consisting of a chain conveyor and a heater, and further comprising a rotating unit that allows a single wire harness entering the heating chamber of the heater to rotate in alternating directions.

[0007] As a preferred embodiment of this invention, the alternating forward and reverse rotation unit includes a column, a screw, a contact plate, and a belt conveyor;

[0008] The lower end of the column is located inside the heating chamber, and the upper end of the column slides through the heater;

[0009] The screw is mounted on the upper end of the heater via a mounting plate, and the lower end of the screw is threadedly connected to the column.

[0010] The contact plate and the belt conveyor are both located inside the heating chamber and installed at the lower end of the column. The lower end of the contact plate is provided with raised contact surfaces at equal intervals. The lower part of the belt on the belt conveyor is provided with a concave part opposite to the raised contact surfaces. A rotating shaft is rotatably provided at the corner of each concave part, and the rotating shaft is installed on the belt conveyor.

[0011] The raised contact surface is flush with the flat contact portion at the lower end of the belt;

[0012] The chain plate on the chain conveyor is provided with a semi-circular groove adapted to the wire harness and two sets of through holes, and the two sets of through holes are located at both ends of the semi-circular groove.

[0013] The chain plate moves in the same direction as the belt, and the belt runs at a speed greater than the chain plate.

[0014] In a preferred embodiment of this invention, an elastic pad is bonded to the lower end of the protruding contact surface, and the lower end of the elastic pad is set as a rough surface.

[0015] The inner wall of the semi-circular groove is set as a smooth surface, and the outer contact surface of the belt is set as a rough surface.

[0016] In summary, the technical effects and advantages of this utility model are as follows:

[0017] This utility model has a reasonable structure and adds a forward and reverse alternating rotation unit. Through the forward and reverse alternating rotation of the wire harness, each point on the surface of the heat shrink tubing can periodically switch the angle facing the heating source, effectively offsetting the temperature gradient in the heating cavity, ensuring that each area on the heat shrink tubing can receive heat evenly, and avoiding local overheating or underheating.

[0018] The bidirectional disturbance generated by alternating rotation can promote the expulsion of air between the heat shrink tubing and the wire harness from multiple directions. At the same time, the heat shrink tubing can more fully "wrap" the surface of the wire harness during alternating rotation, which can significantly reduce gaps and improve sealing performance, especially for thicker wire harnesses or complex-shaped joints. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the contact plate and belt conveyor structure;

[0022] Figure 3 for Figure 2 Schematic diagram of the belt arrangement and contact plate structure;

[0023] Figure 4 for Figure 1 Schematic diagram of the middle chain plate structure.

[0024] In the diagram: 1. Chain conveyor; 2. Heater; 3. Contact plate; 4. Belt conveyor; 5. Column; 6. Screw; 7. Chain plate; 8. Through hole; 9. Semi-circular groove; 10. Belt; 11. Concave part; 12. Shaft; 13. Raised contact surface; 14. Flat contact part. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example: Reference Figure 1-4 The above describes a wire harness production equipment with alternating forward and reverse rotation for heat shrink tubing baking. It includes a dryer consisting of a chain conveyor 1 and a heater 2, and also includes an alternating forward and reverse rotation unit that allows a single wire harness entering the heating chamber of the heater 2 to rotate alternately forward and reverse.

[0027] The alternating forward and reverse rotation unit includes a column 5, a screw 6, a contact plate 3, and a belt conveyor 4;

[0028] The lower end of the column 5 is located inside the heating chamber, and the upper end of the column 5 slides through the heater 2;

[0029] The screw 6 is mounted on the upper end of the heater 2 via a mounting plate, and the lower end of the screw 6 is threadedly connected to the column 5.

[0030] The contact plate 3 and the belt conveyor 4 are both located inside the heating chamber and installed at the lower end of the column 5. The lower end of the contact plate 3 is provided with raised contact surfaces 13 at equal intervals. The lower part of the belt on the belt conveyor 4 is provided with a concave part 11 opposite to the raised contact surface 13. A rotating shaft 12 is rotatably provided at the corner of each concave part 11 and the rotating shaft 12 is installed on the belt conveyor 4.

[0031] The raised contact surface 13 is flush with the flat contact portion 14 at the lower end of the belt;

[0032] The chain plate 7 on the chain conveyor 1 is provided with a semi-circular groove 9 adapted to the wire harness and two sets of through holes 8, and the two sets of through holes 8 are located at both ends of the semi-circular groove 9.

[0033] The chain plate 7 described above moves in the same direction as the belt 10 described below, and the belt 10 runs at a speed greater than the chain plate 7.

[0034] During operation, a single cylindrical thick wire bundle (in a straight state) is placed in the semi-circular groove 9 (the radius of the semi-circular groove 9 is the radius of the wire bundle). The length of the semi-circular groove 9 matches the length of the wire bundle. The heat shrink tubing fitted at both ends of the wire bundle is located in the through holes 8 (the heat shrink tubing does not contact the chain plate 7, and because it is a thick wire bundle, both the heat shrink tubing and the wire are in a straight state and do not bend). The chain plate conveyor 1 operates, transporting the wire bundle placed on the chain plate 7 to the heating chamber. During the movement of the chain plate 7, the wire bundle protrudes from the semi-circular groove. Part 9 will contact the flat contact part 14 at the lower end of the running belt 10. The friction between the wire harness and the belt 10 will drive the wire harness to rotate clockwise in the semi-circular groove 9. After the wire harness separates from the flat contact part 14, it will contact the raised contact part 13. At this time, the wire harness will rotate counterclockwise due to the friction with the raised contact part 13. After the wire harness separates from the raised contact part 13, it will contact the flat contact part 14 again. This process is repeated so that the wire harness can form a continuous alternating forward and reverse rotation motion.

[0035] An alternating forward and reverse rotation unit is added. Through the alternating forward and reverse rotation of the wire harness, the angle of each point on the surface of the heat shrink tubing towards the heating source can be switched periodically, which effectively cancels the temperature gradient in the heating cavity and ensures that each area on the heat shrink tubing can receive heat evenly, avoiding local overheating or underheating.

[0036] The bidirectional disturbance generated by alternating rotation can promote the expulsion of air between the heat shrink tubing and the wire harness from multiple directions. At the same time, the heat shrink tubing can more fully "wrap" the surface of the wire harness during alternating rotation, which can significantly reduce gaps and improve sealing performance, especially for thicker wire harnesses or complex-shaped joints.

[0037] It should be noted that: First, after the wire harness is removed from the heating chamber, it will automatically fall into the receiving box set on the right side; Second, the height of the contact plate 3 and the belt conveyor 4 can be adjusted by rotating the screw 6 to change the compression between the raised contact part 13 and the flat contact part 14 and the wire harness as needed.

[0038] In a preferred embodiment of this invention, an elastic pad is bonded to the lower end of the raised contact surface 13, and the lower end of the elastic pad is set as a rough surface.

[0039] The inner wall of the semi-circular groove 9 is set as a smooth surface, and the outer contact surface of the belt 10 is set as a rough surface.

[0040] Since both the elastic pad and the belt 10 are made of rubber, even if the surface is made rough, it will not cause scratches on the surface of the wire harness. At the same time, the rough surface can increase the contact friction between the wire harness and the belt, making it easier to rotate the wire harness. The semi-circular groove 9 is made of smooth surface, which can prevent the wire harness from being scratched when rotating and reduce the rotational resistance.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drying apparatus for alternating forward and reverse rotary heat shrink tubing production, comprising a dryer consisting of a chain conveyor (1) and a heater (2), characterized in that: It also includes a forward and reverse rotation unit that allows a single wire bundle entering the heating chamber of the heater (2) to rotate in both forward and reverse directions.

2. The alternating forward and reverse rotary heat shrink tubing baking equipment for wire harness production according to claim 1, characterized in that: The alternating forward and reverse rotation unit includes a column (5), a screw (6), a contact plate (3), and a belt conveyor (4). The lower end of the column (5) is located inside the heating chamber, and the upper end of the column (5) slides through the heater (2). The screw (6) is mounted on the upper end of the heater (2) via a mounting plate, and the lower end of the screw (6) is threadedly connected to the column (5); The contact plate (3) and the belt conveyor (4) are both located inside the heating chamber and installed at the lower end of the column (5). The lower end of the contact plate (3) is provided with raised contact surfaces (13) at equal intervals. The lower part of the belt on the belt conveyor (4) is provided with a concave part (11) opposite to the raised contact surface (13). A rotating shaft (12) is rotatably provided at the corner of each concave part (11), and the rotating shaft (12) is installed on the belt conveyor (4). The raised contact surface (13) is flush with the flat contact portion (14) at the lower end of the belt; The chain plate (7) on the chain plate conveyor (1) is provided with a semi-circular groove (9) adapted to the wire harness and two sets of through holes (8), and the two sets of through holes (8) are located at both ends of the semi-circular groove (9). The chain plate (7) moves in the same direction as the belt (10), and the belt (10) moves at a speed greater than the chain plate (7).

3. The alternating forward and reverse rotary heat shrink tubing baking equipment for wire harness production according to claim 2, characterized in that: An elastic pad is bonded to the lower end of the raised contact surface (13), and the lower end of the elastic pad is set as a rough surface; the inner wall of the semi-circular groove (9) is set as a smooth surface, and the outer contact surface of the belt (10) is set as a rough surface.

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