Heat shrink tube expansion equipment
The expansion equipment designed with vacuum adsorption and cooling tanks solves the problems of uneven expansion and untimely cooling during the expansion process of heat shrink tubing, achieving uniform expansion and rapid cooling of heat shrink tubing, thereby improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG PRERENTE BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-24
AI Technical Summary
During the expansion process, heat shrink tubing is prone to uneven expansion, untimely cooling, resulting in poor dimensional stability, weakened mechanical properties, and long-term reliability risks, increasing the difficulty of production quality control and safety risks.
The expansion device, which employs vacuum adsorption and a cooling tank design, achieves uniform expansion of the heat shrink tubing through a Y-shaped tube and a frustum-shaped expansion port, and utilizes the cooling tank for rapid cooling, ensuring uniform adhesion and rapid cooling of the heat shrink tubing during the expansion process.
This technology enables uniform expansion and rapid cooling of heat shrink tubing, avoiding stress concentration and uneven deformation, improving production efficiency and product dimensional stability, and reducing material waste and production costs.
Smart Images
Figure CN224158868U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat shrink tubing expansion technology, specifically to a heat shrink tubing expansion device. Background Technology
[0002] Heat shrink tubing is a material with shape memory properties. It changes from a highly elastic state to a glassy state when heated and returns to its original state when cooled. This property makes heat shrink tubing widely used in fields such as wire and cable protection and medical devices.
[0003] Uneven expansion of heat shrink tubing can lead to systemic failure of insulation protection, disintegration of mechanical properties and structure, complete mismatch of process adaptation, and a chain reaction of long-term reliability collapse. It can also amplify catastrophic consequences in highly sensitive scenarios such as medical contamination, military failure, and rail transit discharge. Precise intervention through a combination of technologies such as equipment precision calibration, segmented temperature control processes, and ultrasonic non-destructive testing, along with simultaneous enhancement of material memory properties and standardized operations, is necessary to avoid the multi-level risks from insulation failure to fire and explosion.
[0004] If heat shrink tubing is not cooled in time during the expansion process, it will cause a chain of problems such as poor dimensional stability, weakened mechanical properties, frequent surface defects, loss of process stability control and long-term reliability risks. Ultimately, this will lead to product mismatch with the wrapped object, shortened service life, and increased difficulty in production quality control and potential safety risks.
[0005] In view of the above, in order to overcome the above technical problems, this utility model designs a heat shrink tubing expansion device, which solves the above technical problems. Utility Model Content
[0006] The technical objective of this invention is to enable the heat shrink tubing to achieve smooth and uniform diameter gradual expansion during the flow process through a heat shrink tubing expansion device. This structure not only avoids the stress concentration and uneven deformation problems that may be caused by traditional stepped flaring, but also precisely controls the final expansion size of the heat shrink tubing.
[0007] To achieve the above-mentioned technical objectives, this utility model provides the following technical solution:
[0008] This utility model provides a heat shrink tubing expansion device, including a heating tube and an expansion tube. The heat shrink tubing is heated in the heating tube to reach a highly elastic state before entering the expansion tube. The Y-shaped tube in the expansion tube uses a conveying hole and an adsorption hole to vacuum adsorb the flow hole. The vacuum adsorption of the flow hole causes the heat shrink tubing to adhere to the inner wall of the expansion tube during the expansion process. At the same time, the expansion tube cools the heat shrink tubing through a cooling tank.
[0009] Preferably, the expansion tube has a flow hole inside, which is composed of an inlet, an expansion port, and a stabilizing port connected to each other. The expansion port is shaped like a frustum, with the smaller diameter end of the expansion port connected to the inlet and the larger diameter end connected to the stabilizing port.
[0010] Preferably, eight delivery holes are arrayed on the expansion tube surrounding the expansion port and the stabilizing port. The shape of the delivery holes is formed along the outer perimeter of the expansion port and the stabilizing port. A Y-shaped tube is connected to the outer perimeter of two adjacent delivery holes near the expansion port. The Y-shaped tube is located inside the expansion tube.
[0011] Preferably, the conveying hole is connected to an adsorption hole, the adsorption hole is oriented towards the concentric axis of the expansion tube, and the adsorption hole around the expansion port is perpendicular to the inner wall of the expansion tube.
[0012] Preferably, a cooling tank is provided inside the expansion tube surrounding the stabilizing port. The cooling tank is connected to an inlet pipe above one end of the heating tube, and an outlet pipe is connected to the lower end of the other end of the cooling tank.
[0013] Preferably, the cooling tank is composed of an annulus and an array of sector-shaped phases, and the sector-shaped phases in the cooling tank are located between vacuum tubes.
[0014] The beneficial effects of this utility model are as follows:
[0015] 1. Vacuum adsorption adheres the heat shrink tubing to the inner wall of the expansion tube, ensuring a uniform fit during expansion and avoiding the uneven expansion problems that occur in traditional methods. Furthermore, a cooling tank is installed inside the expansion tube to rapidly cool the heat shrink tubing, thereby shortening cooling time and improving production efficiency.
[0016] 2. The frustum-shaped flare opening features a gradual expansion design, enabling the heat shrink tubing to achieve a smooth and uniform diameter gradual expansion during flow. This structure not only avoids the stress concentration and uneven deformation problems that may be caused by traditional stepped flare openings, but also allows for precise control of the final expansion dimension of the heat shrink tubing.
[0017] 3. The Y-shaped tube connects adjacent delivery holes and evenly adsorbs the air inside the delivery holes, thereby achieving uniform adsorption of the heat shrink tubing; at the same time, the design of the Y-shaped tube near the expansion port makes the adsorption force of the heat shrink tubing gradually decrease from left to right, which helps the heat shrink tubing to unfold more easily in the initial expansion stage.
[0018] 4. By incorporating cooling channels within the expansion tube and connecting the inlet and outlet pipes, the coolant circulates efficiently to dissipate heat. This design not only improves cooling efficiency but also optimizes temperature distribution through a uniformly distributed cooling channel structure, preventing heat shrink tubing deformation or localized overheating. Attached Figure Description
[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] The above and other aspects of the present invention will now be described by way of example only, with reference to the accompanying drawings, in which:
[0021] Figure 1 This is a schematic diagram of the overall design of this utility model;
[0022] Figure 2 This is an overall cross-sectional view of the present invention;
[0023] Figure 3 This is a diagram of the Y-shaped tube connection of this utility model;
[0024] Figure 4 This is a front view of the Y-shaped tube of this utility model;
[0025] Figure 5 This is a schematic diagram of the conveying hole of this utility model;
[0026] Figure 6 This is a schematic diagram of the cooling tank of this utility model.
[0027] In the diagram: 1. Heating tube; 2. Expansion tube; 21. Flow hole; 211. Inlet; 212. Expansion port; 213. Stabilizing port; 22. Delivery hole; 23. Y-shaped tube; 24. Adsorption hole; 25. Cooling tank; 251. Liquid inlet tube; 252. Liquid outlet tube. Detailed Implementation
[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0029] like Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, this utility model provides a heat shrink tubing expansion device, including a heating tube 1 and an expansion tube 2. The heat shrink tubing enters the expansion tube 2 after being heated in the heating tube 1 to reach a highly elastic state. In the expansion tube 2, the Y-shaped tube 23 performs vacuum adsorption on the flow hole 21 through the conveying hole 22 and the adsorption hole 24. The vacuum adsorption of the flow hole 21 causes the heat shrink tubing to adhere to the inner wall of the expansion tube 2 during the expansion process. At the same time, the expansion tube 2 cools the heat shrink tubing through the cooling tank 25.
[0030] During the expansion process, vacuum adsorption technology is used to adsorb the heat shrink tubing onto the inner wall of the expansion tube 2, ensuring uniform adhesion during expansion and avoiding the uneven expansion problems that occur in traditional methods. Furthermore, a cooling groove 25 is installed inside the expansion tube 2 to rapidly cool the heat shrink tubing, thereby shortening cooling time and improving production efficiency. This cooling method effectively reduces the axial shrinkage rate of the heat shrink tubing, ensuring the dimensional stability of the product. By precisely controlling the expansion and cooling processes, material waste caused by uneven expansion or poor cooling is reduced, thus lowering production costs.
[0031] like Figure 1 and 2 As shown, the expansion tube 2 has a flow hole 21 inside. The flow hole 21 is composed of an inlet 211, an expansion port 212 and a stabilizing port 213 connected to each other. The expansion port 212 is shaped like a frustum. The end of the expansion port 212 with a smaller diameter is connected to the inlet 211, and the end of the expansion port 212 with a larger diameter is connected to the stabilizing port 213.
[0032] The frustum-shaped flare uses a gradual expansion design, enabling the heat shrink tubing to expand smoothly and uniformly in diameter during flow. This structure not only avoids the stress concentration and uneven deformation problems that can occur with traditional stepped flare designs, but also allows for precise control of the final expansion size of the heat shrink tubing. Furthermore, the gradual expansion design helps reduce frictional resistance during the expansion process, improving production efficiency while ensuring product dimensional consistency and stability.
[0033] like Figure 1 , 2 As shown in Figures 3 and 4, eight conveying holes 22 are arrayed on the expansion tube 2 surrounding the expansion port 212 and the stabilizing port 213. The shape of the conveying holes 22 is opened along the outer periphery of the expansion port 212 and the stabilizing port 213. A Y-shaped tube 23 is connected to the outer periphery of two adjacent conveying holes 22 near the expansion port 212. The Y-shaped tube 23 is located inside the expansion tube 2.
[0034] The design of the delivery holes 22 on the expansion port 212 and the stabilizing port 213 ensures that the heat shrink tubing can be evenly attached to the inner wall of the expansion tube 2 during the expansion process by forming a stable negative pressure environment. The Y-shaped tube 23 connects the adjacent delivery holes 22 and evenly adsorbs the air inside the delivery holes 22, thereby achieving uniform adsorption of the heat shrink tubing. At the same time, the design of the Y-shaped tube 23 near the expansion port 212 makes the adsorption force of the heat shrink tubing gradually decrease from left to right, which helps the heat shrink tubing to unfold more easily in the initial stage of expansion. In addition, the design of the Y-shaped tube 23 can evenly distribute the fluid in multiple directions, thereby achieving efficient and uniform adsorption of the fluid.
[0035] like Figure 2 and 5As shown, the conveying hole 22 is connected to an adsorption hole 24. The adsorption hole 24 is oriented towards the concentric axis of the expansion tube 2, and the adsorption hole 24 around the expansion port 212 is perpendicular to the inner wall of the expansion tube 2.
[0036] The adsorption holes 24 are arranged along the concentric axis of the expansion tube 2, allowing the heat shrink tubing to precisely adhere to the inner wall of the expansion tube 2 during adsorption. This design not only avoids wrinkling caused by uneven force but also improves product yield and reduces material waste. Simultaneously, the concentric arrangement optimizes airflow distribution, ensuring the heat shrink tubing maintains a stable and uniform force state during expansion.
[0037] like Figure 5 and 6 As shown, a cooling tank 25 is provided inside the expansion tube 2 surrounding the stabilizing port 213. The cooling tank 25 is located above one end of the heating tube 1 and connected to an inlet pipe 251. The other end of the cooling tank 25 is connected to an outlet pipe 252.
[0038] By incorporating a cooling tank 25 inside the expansion tube 2 and connecting the inlet pipe 251 and outlet pipe 252, the coolant circulates to efficiently dissipate heat. This design not only improves cooling efficiency but also optimizes temperature distribution through the evenly distributed cooling tank 25 structure, preventing heat shrink tubing deformation or localized overheating. Furthermore, the stable liquid cooling system can adapt to high-speed production demands while reducing energy consumption and maintenance costs.
[0039] like Figure 5 and 6 As shown, the cooling tank 25 is composed of an annulus and an array of sector-shaped phases, and the sector-shaped phases in the cooling tank 25 are located between vacuum tubes.
[0040] The fan-shaped design in the cooling tank 25 can effectively cool the inside of the expansion tube 2 and shorten the distance between the coolant and the heat shrink tubing, thereby significantly improving cooling efficiency.
[0041] In operation, the heat shrink tubing is fed into the heating tube 1, where it is heated to a high-elasticity state before being fed into the expansion tube 2. The heated heat shrink tubing then passes sequentially through the inlet 211, expansion port 212, and stabilizing port 213. When the heat shrink tubing enters the expansion port 212, it is attracted by the Y-shaped tube 23 through the delivery hole 22 and the adsorption hole 24, thus expanding the tubing. When the expanded heat shrink tubing enters the stabilizing port 213, the adsorption hole 24 helps maintain its tight fit against the inner wall of the expansion tube 2. Simultaneously, coolant flows into the cooling tank 25 through the inlet pipe 251 to cool the heat shrink tubing, facilitating better shaping. The coolant in the cooling tank 25 then flows out through the outlet pipe 252, ensuring a more constant temperature for the coolant in the cooling tank 25.
[0042] Although the present disclosure has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to the embodiments of the present disclosure, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present disclosure are within the scope of protection claimed by the present disclosure.
Claims
1. A heat shrink tubing expansion device, comprising a heating tube (1), characterized in that, It also includes an expansion tube (2). The heat shrink tube enters the expansion tube (2) after being heated in the heating tube (1) to reach a high elastic state. The Y-shaped tube (23) in the expansion tube (2) vacuum adsorbs the flow hole (21) through the delivery hole (22) and the adsorption hole (24). The vacuum adsorption flow hole (21) causes the heat shrink tube to adhere to the inner wall of the expansion tube (2) during the expansion process. At the same time, the expansion tube (2) cools the heat shrink tube through the cooling tank (25).
2. The heat shrink tubing expansion device according to claim 1, characterized in that: The expansion tube (2) has a flow hole (21) inside. The flow hole (21) is composed of an inlet (211), an expansion port (212) and a stabilizing port (213) connected to each other. The expansion port (212) is shaped like a frustum. The end of the expansion port (212) with a smaller diameter is connected to the inlet (211), and the end of the expansion port (212) with a larger diameter is connected to the stabilizing port (213).
3. The heat shrink tubing expansion device according to claim 2, characterized in that: Eight delivery holes (22) are arrayed on the expansion tube (2) surrounding the expansion port (212) and the stabilizing port (213). The shape of the delivery holes (22) is opened along the outer periphery of the expansion port (212) and the stabilizing port (213). A Y-shaped tube (23) is connected to the outer periphery of one end of two adjacent delivery holes (22) near the expansion port (212). The Y-shaped tube (23) is located inside the expansion tube (2).
4. The heat shrink tubing expansion device according to claim 3, characterized in that: The delivery hole (22) is connected to an adsorption hole (24). The adsorption hole (24) is oriented in the direction of the concentric axis facing the expansion tube (2), and the adsorption hole (24) around the expansion port (212) is perpendicular to the inner wall of the expansion tube (2).
5. The heat shrink tubing expansion device according to claim 4, characterized in that: A cooling tank (25) is provided inside the expansion tube (2) surrounding the stabilizing port (213). The cooling tank (25) is located above one end of the heating tube (1) and connected to an inlet pipe (251). The cooling tank (25) is connected to an outlet pipe (252) below the other end of the cooling tank (25).
6. The heat shrink tubing expansion device according to claim 5, characterized in that: The cooling tank (25) is composed of an annulus and an array of sector phases, and the sector phases in the cooling tank (25) are located between vacuum tubes.