A wire film forming apparatus

Abstract

The application provides a wire film forming device, and relates to the technical field of wire and cable manufacturing, which comprises a rack and a temperature control box located above the rack, a plurality of parallel wire running channels are arranged in the temperature control box, a heating section, a quenching section and a temperature recovery section are sequentially arranged in the wire running channels along the wire running direction, a heater is arranged at the bottom of the heating section, a refrigerator is arranged at the bottom of the quenching section, a fan is arranged on the rack, the air inlet end of the fan is connected with the start end of the wire running channel, the air outlet end of the fan is connected with the start end of the temperature recovery section, and the air outlet end of the fan faces the end of the temperature recovery section. The application has the advantages of low energy consumption and high wire quality.

Description

Technical Field

[0001] This invention relates to the field of wire and cable manufacturing technology, and in particular to a wire-insulated film forming device. Background Technology

[0002] Wire-insulated film forming is a wire processing method that involves densely wrapping a copper conductor with wire, then heating it to melt and flatten the polymer wire, forming a dense insulating layer on the outside of the copper conductor. Figure 4 As shown, compared to enameled wire, silk-covered wire not only improves the strength of the finished product by wrapping the silk threads, but also makes the film layer more uniform and dense. It is widely used in inductor coils in consumer electronics (wireless charging) and power tools (motors).

[0003] In the film-forming process of wire-wrapped conductors, the wire is first heated to approximately 80 degrees Celsius (the heating temperature varies depending on the wrapping material), then rapidly cooled to set the shape and prevent irregular deformation of the molten adhesive layer. After rapid cooling, the conductor is wound up. Currently, our company uses equipment such as... Figure 3 As shown, the process is as described above. This method has the following drawbacks: 1. During rapid cooling, the environment of the copper wire is around 5 degrees Celsius. An evaporator is set below the wiring channel to cool the wiring channel. Although the temperature of the wiring channel is controlled above zero degrees, the evaporator itself is close to or slightly below zero degrees (this is related to the room temperature. The higher the room temperature, the lower the evaporator itself may be to meet the rapid cooling environment of 5 degrees Celsius for the wiring channel above it). This causes ice to form at the evaporator. The ice not only prevents the wiring channel from adjusting the ambient temperature in a timely and effective manner, but also causes ice accumulation, which obstructs the wiring. 2. Immediately winding after rapid cooling will cause creases or stress defects in the film layer (the film layer becomes harder at low temperatures). In addition, setting up a section of traction to slow down the temperature of the copper wire in the room will cause a loss of space in the workshop. Moreover, the surface of the film layer is extremely prone to dust adhesion after rapid cooling (the low temperature of the film layer and the large temperature difference with the external environment will accelerate the air in the workshop to approach the film layer). Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a film-forming device for insulated wires, which shortens the traction length and reduces stress defects.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a wire-wrapped film forming device, characterized in that it includes a frame and a temperature control box located on the frame, wherein the temperature control box is provided with a plurality of parallel wire routing channels, and a heating section, a rapid cooling section and a reheating section are arranged sequentially along the wire routing direction in the wire routing channels, wherein a heater is provided at the bottom of the heating section, a cooler is provided at the bottom of the rapid cooling section, and a fan is provided on the frame, wherein the air inlet of the fan is connected to the beginning of the wire routing channel, the air outlet of the fan is connected to the beginning of the reheating section, and the air outlet of the fan faces the end of the reheating section.

[0006] Furthermore, the heating section and the rapid cooling section are on the same straight line with an inclination angle of 5 to 60° to the horizontal plane, and the reheating section has an inclination angle of 5 to 30° to the horizontal plane. The beginning of the heating section is higher than the end of the rapid cooling section, and the end of the reheating section is higher than the beginning of the reheating section.

[0007] Furthermore, thermal insulation partitions are provided between the end of the heating section and the beginning of the quenching section, and between the end of the quenching section and the beginning of the reheating section.

[0008] Furthermore, the gas pipe connecting the beginning of the heating section and the beginning of the reheating section is covered with an insulation layer and located at the bottom of the temperature control box.

[0009] Furthermore, an exhaust pipe is provided at the end of the reheating section.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] 1. This solution sets up a reheating section at the end of the rapid cooling section, and sends the hot air flow carrying room temperature air at the entrance of the wiring channel into the beginning of the reheating section to heat the copper wire after rapid cooling. This heating can only increase the temperature of the copper wire to a limited extent, keeping the copper wire close to or slightly higher than room temperature before exiting the wiring channel, so that the toughness and flexibility of the film layer can be restored after the copper wire exits the wiring channel, and it can be wound up immediately. There are fewer stress defects, eliminating room temperature traction after rapid cooling, and avoiding copper wire contamination caused by room temperature traction.

[0012] 2. Sending the hot air from the beginning of the heating section to the beginning of the reheating section can effectively reduce water vapor from entering the quenching section from the beginning and end of the wiring channel, which can delay and reduce icing in the quenching section and greatly extend the de-icing cycle.

[0013] 3. This solution can effectively avoid the increase in room temperature. The upward hot air generated at the beginning of the heating section is drawn into the beginning of the return section in large quantities, and an exhaust pipe is set at the end of the return section to discharge the low-temperature hot air to the outside. It is easy to see that this approach also optimizes energy consumption, that is, the return section does not need to consume energy separately.

[0014] 4. The entire wiring channel is designed in a V-shape, taking advantage of the upward movement of hot air to further block water vapor from entering the quench section. That is, hot air is generated at both ends of the wiring channel, which prevents water vapor from entering the wiring channel. Compared with the wiring channel set on the water, it has a stronger water vapor blocking ability. In addition, this V-shaped structure can also effectively reduce the interference of the higher temperature at both ends of the quench section on the low temperature environment of the quench section. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the wire-wrapped film forming equipment;

[0016] Figure 2 This is a schematic diagram of the wiring channels for existing film-forming equipment.

[0017] Figure 3 This is a schematic diagram of the structure of a single cabling channel;

[0018] Figure 4 This is a schematic diagram of a coated wire formed by hot melting and cold solidification of a silk-covered wire.

[0019] Legend: 1. Frame; 2. Temperature control box; 3. Cable routing channel; 4. Heater; 5. Refrigerator; 6. Fan; 7. Insulation partition; 8. Exhaust pipe; a. Heating section; b. Rapid cooling section; c. Reheating section. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] like Figure 1 and Figure 3 As shown, the device includes a frame 1 and a temperature control box 2 located on the frame 1. The temperature control box 2 has several parallel wiring channels 3. The wiring channels 3 are arranged sequentially along the wiring direction, including a heating section a, a rapid cooling section b, and a reheating section c. A heater 4 is installed at the bottom of the heating section a, and a cooler 5 is installed at the bottom of the rapid cooling section b. A fan 6 is installed on the frame 1. The air inlet of the fan 6 is connected to the beginning of the wiring channel 3, and the air outlet of the fan 6 is connected to the beginning of the reheating section c. The air outlet of the fan 6 faces the end of the reheating section c.

[0022] Heating section a and quenching section b are on the same straight line with an inclination angle of 5 to 60° to the horizontal plane, and reheating section c has an inclination angle of 5 to 30° to the horizontal plane. The beginning of heating section a is higher than the end of quenching section b, and the end of reheating section c is higher than the beginning of reheating section c.

[0023] Thermal insulation partitions 7 are provided between the end of heating section a and the beginning of quenching section b, and between the end of quenching section b and the beginning of reheating section c; the gas pipe connecting the beginning of heating section a and the beginning of reheating section c is covered with a thermal insulation layer and is located at the bottom of temperature control box 2; an exhaust pipe 8 is provided at the end of reheating section c.

[0024] The wiring channels 3 are arranged on the temperature control box 2, and each wiring channel 3 is separated from the others, that is, each wiring channel 3 is individually temperature controlled. After the wire enters from the inlet of the wiring channel 3, the heater 4 continuously heats it. After being heated to the design temperature, it passes through the quench section b. The low temperature environment generated by the evaporator in the quench section b causes the molten layer on the surface of the copper wire to solidify. After being solidified, the copper wire then enters the reheating section c. The hot air in the reheating section c comes from the hot air drawn from the beginning of the heating section a by the fan 6. The wire is heated to about room temperature before exiting. After exiting, the wire can be wound up. An exhaust pipe 8 is installed at the top of the reheating section c to send the hot air containing volatile organic compounds to the outside for centralized treatment.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A wire-wrapped film forming device, characterized in that, Includes a frame (1) and a temperature control box (2) located on the frame (1). The temperature control box (2) is provided with several parallel wiring channels (3). The wiring channels (3) are arranged in sequence along the wiring direction, including a heating section (a), a rapid cooling section (b) and a reheating section (c). A heater (4) is provided at the bottom of the heating section (a), and a cooler (5) is provided at the bottom of the rapid cooling section (b). A fan (6) is provided on the frame (1). The air inlet of the fan (6) is connected to the beginning of the wiring channel (3), and the air outlet of the fan (6) is connected to the beginning of the reheating section (c). The air outlet of the fan (6) faces the end of the reheating section (c). The heating section (a) and the quenching section (b) are on the same straight line with an angle of 5 to 60° to the horizontal plane. The reheating section (c) has an angle of 5 to 30° to the horizontal plane. The beginning of the heating section (a) is higher than the end of the quenching section (b), and the end of the reheating section (c) is higher than the beginning of the reheating section (c).

2. The wire-wrapped film forming equipment according to claim 1, characterized in that, Thermal insulation partitions (7) are provided between the end of the heating section (a) and the beginning of the quenching section (b), and between the end of the quenching section (b) and the beginning of the reheating section (c).

3. The wire-wrapped film forming equipment according to claim 1, characterized in that, The gas pipe connecting the beginning of the heating section (a) and the beginning of the reheating section (c) is covered with an insulation layer and is located at the bottom of the temperature control box (2).

4. The wire-wrapped film forming equipment according to claim 1, characterized in that, An exhaust pipe (8) is provided at the end of the reheat section (c).

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