Dustproof box for uniformly coating mica powder on cable insulation layer and method thereof

Abstract

The invention relates to a dustproof box for uniformly coating a cable insulation layer with mica powder and a method thereof, and relates to the technical field of cable production, the dustproof box comprises a driving mechanism, a sealing box used for penetrating and conveying a cable, and a powder coating roller set arranged in the sealing box and used for rolling and brushing the cable, the powder coating roller set comprises a first powder coating roller and a second powder coating roller which are arranged on the two sides of the cable correspondingly and oppositely, the first powder coating roller and the second powder coating roller are obliquely arranged in the entering direction of the cable, and the driving mechanism is used for driving the first powder coating roller and the second powder coating roller to rotate in the opposite directions. In the cable coating process, certain upward supporting force can be provided for a cable, the cable is prevented from drooping or bending due to gravity, the coating quality is guaranteed, the contact area between the cable and the powder coating roller can be increased, the powder adhesion rate is increased, and mica powder is more evenly distributed on the surface of the cable.

Description

Technical Field

[0001] This invention belongs to the field of cable production technology, and specifically relates to a dustproof box and method for uniformly coating the cable insulation layer with mica powder. Background Technology

[0002] In the wire and cable manufacturing process, the cable core insulation layer is typically applied directly to the cable core using an extrusion die after being heated, and then wound onto rollers. To prevent the cable insulation layers on the rollers from sticking together and affecting subsequent use, a powder material such as mica powder needs to be applied to the cable insulation layer. Current technology usually uses an electrostatic powder coating machine to treat the cable, allowing the mica powder to adhere to the surface of the cable insulation layer.

[0003] However, the mica powder coating on the cable of the electrostatic powder coating machine is often uneven, with some areas being too thick and others too thin, or even missing areas. Uneven mica powder coating will affect the physical properties of the product, and too much mica powder will also cause dust during later use.

[0004] Existing technology cannot provide effective support for cables when the cable insulation layer passes through the electrostatic powder coating machine, causing the cable to sag or bend under gravity, affecting the uniform coating of mica powder and reducing product quality.

[0005] Therefore, in order to address the above-mentioned technical problems, a dustproof box for uniformly coating the cable insulation layer with mica powder is designed. During the cable coating process, it can provide a certain upward support force for the cable, prevent the cable from sagging or bending due to gravity, ensure the coating quality, and increase the contact area between the cable and the powder coating roller, thereby improving the powder adhesion rate and making the distribution of mica powder on the cable surface more uniform. These are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a dustproof box and method for uniformly coating the cable insulation layer with mica powder. During the cable coating process, it can provide a certain upward support force to the cable, preventing the cable from sagging or bending due to gravity, ensuring coating quality, and increasing the contact area between the cable and the powder coating roller, thereby improving the powder adhesion rate and making the mica powder distribution on the cable surface more uniform.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] A dustproof box for uniformly coating the cable insulation layer with mica powder includes a drive mechanism, a sealed box for threading and conveying the cable, and a powder coating roller group disposed inside the sealed box for brushing the cable. The powder coating roller group includes a first powder coating roller and a second powder coating roller respectively disposed on both sides of the cable and disposed opposite to each other. The first powder coating roller and the second powder coating roller are inclined along the entry direction of the cable, and the angle of inclination is an acute angle with the conveying direction of the cable. The drive mechanism is used to drive the first powder coating roller and the second powder coating roller to rotate in opposite directions.

[0009] Preferably, the driving mechanism includes a first driving motor for driving the first powder coating roller to rotate and a second driving motor for driving the second powder coating roller to rotate, so the first driving motor and the second driving motor are respectively connected to the inside of the sealed box through a first bracket and a second bracket.

[0010] Preferably, the first angle adjustment mechanism for adjusting the angle of the first drive motor is provided between the first bracket and the first drive motor, and the second angle adjustment mechanism for adjusting the angle of the second drive motor is provided between the second bracket and the second drive motor.

[0011] Preferably, the sealed box is characterized in that a powder receiving box for collecting mica powder is provided at the bottom, and an extraction port for extracting the powder receiving box is provided on the side wall of the sealed box facing the powder receiving box, and a folding plate is provided at the extraction port to realize the opening and closing of the extraction port.

[0012] Preferably, the first powder coating roller and the second powder coating roller are provided with brushes on their outer walls. The brushes include a middle section located in the middle of the brush, an edge section located at the edge of the brush, and a transition section located between the middle section and the edge section. The middle section brush is a carbon fiber and nylon composite brush, the edge section brush is a horsehair brush, and the transition section brush is a brush made of horsehair and polyester fiber mixed in a 7:3 ratio.

[0013] Preferably, the powder receiving box is connected to a powder feeding pipe, and one end of the powder feeding pipe away from the powder receiving box extends between the first powder coating roller and the second powder coating roller.

[0014] Preferably, the powder receiving box and the powder feeding pipe are provided with a Venturi pneumatic conveying device and a cyclone separator connected in sequence, and a spiral conveying device is provided at the end of the powder feeding pipe away from the powder receiving box.

[0015] Preferably, the first powder coating roller and the second powder coating roller form an angle of 10 degrees to 45 degrees with respect to the cable conveying direction and the cable entering direction.

[0016] Preferably, an electrostatic generator is provided on the top of the sealed box, and two or more ventilation openings are provided on the side wall or top of the sealed box. A centrifugal fan is provided on the ventilation opening, and the ventilation opening is connected to the dust collection box through a connecting collection pipe.

[0017] A method for uniformly coating a cable insulation layer with mica powder includes the following steps:

[0018] Step 1: The cable after passing through the electrostatic powder coating machine is threaded through an opening set on the side wall of the sealed box and transported inside the sealed box;

[0019] Step 2: The first and second powder coating rollers installed inside the sealed box provide upward support to the passing cable to prevent the cable from sagging or bending due to gravity.

[0020] Step 3: Excess mica powder falls into the powder receiving box. The mica powder is fed from the powder receiving box into the gap between the first powder coating roller and the second powder coating roller. With the help of the rotation of the first powder coating roller and the second powder coating roller, the powder is evenly coated onto the surface of the cable through which it passes.

[0021] Step 4: Determine whether the cable has passed between the first and second powder coating rollers by manual observation or sensors. If yes, it means that the cable still needs to be coated, so return to step 1. If no, it means that the cable has been coated, so proceed to step 5.

[0022] Step 5: The cable output sealing box, which is evenly coated with mica powder, is then sealed with a centrifugal fan to remove excess scattered dust, thus creating a closed and dust-free working environment.

[0023] The present invention achieves the following technical effects compared to the prior art:

[0024] By tilting the first and second powder coating rollers and rotating them in opposite directions, the contact area between the first and second powder coating rollers and the cable during cable transport can be increased, improving the powder adhesion rate and making the mica powder distribution on the cable surface more uniform. This avoids localized areas of excessive thickness or thinness, thereby improving product consistency and stability. The opposite rotation directions of the first and second powder coating rollers, due to the friction between them and the cable, provide upward support to the passing cable, preventing sagging or bending due to gravity. This also improves coating efficiency, ensures coating quality and uniformity, and further enhances product quality. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Appendix Figure 1 This is a schematic diagram of the main view of a dustproof box with a uniformly coated mica powder layer on the cable insulation layer disclosed in an embodiment of the present invention.

[0027] Appendix Figure 2 This is a schematic diagram of the structure of the dustproof box with the cable insulation layer uniformly coated with mica powder, as disclosed in the embodiments of the present invention, when worn on the back of the hand;

[0028] The components include: 1. Sealed box; 2. First powder coating roller; 3. Cable; 4. Powder receiving box; 5. First drive motor; 6. First angle adjustment mechanism; 7. Second powder coating roller; 8. Second angle adjustment mechanism. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide a dustproof box and method for uniformly coating the cable insulation layer with mica powder. During the cable coating process, it can provide a certain upward support force for the cable, prevent the cable from sagging or bending due to gravity, ensure the coating quality, and increase the contact area between the cable and the powder coating roller, improve the powder adhesion rate, and make the mica powder distribution on the cable surface more uniform.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] refer to Figure 1-Figure 2The dustproof box for uniformly coating the cable insulation layer with mica powder disclosed in this embodiment of the invention includes a sealed box 1. The sealed box 1 has an opening for the cable 3 to pass through. The opening is located on the side wall of the sealed box 1 opposite to the cable 3. The cable 3 passes through the opening from one end of the side wall of the sealed box 1 and exits from the other end, thus enabling the cable 3 to be transported. The cable 3 is horizontally inserted into the sealed box 1. The sealed box 1 is equipped with a powder coating roller assembly for brushing the cable 3. The powder coating roller assembly includes a first powder coating roller 2 and a second powder coating roller 7 respectively disposed on both sides of the cable 3. The first powder coating roller 2 and the second powder coating roller 7 are disposed opposite to each other to achieve roller coating of the entire circumference of the same area of ​​the cable 3. The first powder coating roller 2 and the second powder coating roller 7 are inclined along the entry direction of the cable 3, and the angle between the inclination angle and the transport direction of the cable 3 is an acute angle. The first powder coating roller 2 and the second powder coating roller 7 are driven... The mechanism drives the first powder coating roller 2 and the second powder coating roller 7 to rotate in opposite directions. By tilting the first powder coating roller 2 and the second powder coating roller 7 and rotating in opposite directions, the contact area between the first powder coating roller 2 and the second powder coating roller 7 and the cable 3 during cable 3 transport can be increased, thereby improving the powder adhesion rate and making the mica powder distribution on the surface of the cable 3 more uniform. This avoids local over-thickness or under-thickness, thus improving the consistency and stability of the product. The opposite rotation directions of the first powder coating roller 2 and the second powder coating roller 7, due to the friction between the first powder coating roller 2 and the second powder coating roller 7 and the cable 3, can provide a certain upward support force to the passing cable 3, preventing the cable 3 from sagging or bending due to gravity. This also improves the coating efficiency, ensures coating quality and uniformity, and further enhances the product quality.

[0033] It should be noted that the sealed box 1 is made of transparent acrylic sheet material, which allows operators to observe the overflow level of the powder receiving box 4 from the outside and clean it in time, thereby improving work efficiency. The transparent box design allows operators to clearly monitor the entire production process, making it easier to identify and solve problems in a timely manner.

[0034] The powder coating roller group can be set as one or more groups, and multiple groups of powder coating roller groups are arranged sequentially along the conveying direction of cable 3.

[0035] refer to Figure 1-Figure 2 In one embodiment, the driving mechanism includes a first drive motor 5 for driving the first powder coating roller 2 to rotate and a second drive motor for driving the second powder coating roller 7 to rotate. The first drive motor 5 and the second drive motor are respectively connected to the inside of the sealed box 1 through a first bracket and a second bracket. The first bracket and the second bracket support the first drive motor 5 and the second drive motor, thereby ensuring the stability of the support of the first powder coating roller 2 and the second powder coating roller 7.

[0036] refer to Figure 1-Figure 2In one embodiment, a first angle adjustment mechanism 6 is provided between the first bracket and the first drive motor 5 for adjusting the angle of the first drive motor 5, and a second angle adjustment structure is provided between the second bracket and the second drive motor for adjusting the angle of the second drive motor. By setting the first angle adjustment mechanism 6 and the second angle adjustment mechanism 8, the angles of the first drive motor 5 and the second drive motor can be adjusted, thereby realizing the tilt angle of the first powder coating roller 2 and the second powder coating roller 7.

[0037] It should be noted that the first angle adjustment mechanism 6 and the second angle adjustment mechanism 8 can be four cylinders located between the first drive motor 5 and the second drive motor and the first bracket and the second bracket respectively, and located at the four corners of the first drive motor 5 and the second drive motor. The angle adjustment of the first drive motor 5 and the second drive motor can be achieved by controlling the extension and retraction of the cylinders at different positions. The first drive motor 5 and the second drive motor should be adjusted synchronously so that the first powder coating roller 2 and the second powder coating roller 7 remain parallel at all times.

[0038] It should be noted that a laser diameter measuring instrument is installed at the inlet of cable 3, which can detect the diameter of cable 3 in real time. Furthermore, a matching algorithm for the diameter of cable 3 and the tilt angle of cable 3 is established through the PLC control system to achieve automatic adaptation of cables 3 of different specifications, thereby increasing the contact area between cable 3 and the first powder coating roller 2 and the second powder coating roller 7.

[0039] refer to Figure 1-Figure 2 In one embodiment, a powder receiving box 4 for collecting mica powder is provided at the bottom of the sealed box 1. A retrieval port for removing the powder receiving box 4 is provided on the side wall of the sealed box 1 directly opposite the powder receiving box 4. A folding plate is provided at the retrieval port to open and close the retrieval port. The folding plate is hinged to the side wall of the sealed box 1. By providing the powder receiving box 4, it can be used to store powder materials such as mica powder that fall during the coating process, avoiding material waste and enabling material reuse. By providing the folding plate, the powder receiving box 4 can be taken out and the powder inside can be poured out. The folding plate can close the sealed box 1.

[0040] refer to Figure 1-Figure 2 In one embodiment, brushes are provided on the outer walls of the first powder coating roller 2 and the second powder coating roller 7. The brushes include a middle section located in the middle of the brush, an edge section located at the edge of the brush, and a transition section located between the middle section and the edge section. The middle section brush is a carbon fiber and nylon composite brush, the edge section brush is a horsehair brush, and the transition section brush is a brush made of horsehair and polyester fiber in a 7:3 ratio. Because the middle section is a high wear area, setting the middle section to a carbon fiber and nylon composite brush can improve the wear resistance of the middle section and increase the service life of the high wear area of ​​the middle section. The transition section uses a brush made of horsehair and polyester fiber in a 7:3 ratio to maintain softness and enhance resilience, thereby reducing maintenance costs.

[0041] It should be noted that the middle section, edge section and transition section can also be made entirely with horsehair brushes. Horsehair has a moderate softness and hardness, which will not generate static electricity that causes mica powder to fall off, nor will it be too hard to scrape off mica powder.

[0042] The middle section, edge section and transition section adopt a modular plug-in design and can be replaced individually.

[0043] refer to Figure 1-Figure 2 In one embodiment, a powder feeding pipe is connected to the powder receiving box 4. The end of the powder feeding pipe away from the powder receiving box 4 extends between the first powder coating roller 2 and the second powder coating roller 7. By setting the powder feeding pipe, the mica powder collected in the powder receiving box 4 can be reused. With the rotation of the first powder coating roller 2 and the second powder coating roller 7, the mica powder is evenly coated onto the surface of the cable 3 that passes through.

[0044] refer to Figure 1-Figure 2 In one embodiment, a Venturi pneumatic conveying device and a cyclone separator are connected in sequence between the powder receiving box 4 and the powder feeding pipe. A screw conveying device is provided at the end of the powder feeding pipe away from the powder receiving box 4. By setting the Venturi pneumatic conveying device, the mica powder in the powder receiving box 4 can be conveyed, and the impurities in the mica powder can be removed by the cyclone separator. The powder is then conveyed to the space between the first powder coating roller 2 and the second powder coating roller 7 by the screw conveying device.

[0045] refer to Figure 1-Figure 2 In one embodiment, the angle between the first powder coating roller 2 and the second powder coating roller 7 along the conveying direction of the cable 3 and the entry direction of the cable 3 (i.e., the horizontal direction) is 10 degrees to 45 degrees.

[0046] It should be noted that the angle between the first powder coating roller 2 and the second powder coating roller 7 and the horizontal direction is 10 degrees to 30 degrees, and the rotation speed of the first powder coating roller 2 and the second powder coating roller 7 is 20 to 50 rpm; the angle between the first powder coating roller 2 and the second powder coating roller 7 and the horizontal direction is 20 degrees to 45 degrees, and the rotation speed of the first powder coating roller 2 and the second powder coating roller 7 is 30 to 60 rpm; the angle between the first powder coating roller 2 and the second powder coating roller 7 and the horizontal direction is 15 degrees to 35 degrees, and the rotation speed of the first powder coating roller 2 and the second powder coating roller 7 is 40 to 70 rpm.

[0047] refer to Figure 1-Figure 2 As one implementation method, an electrostatic generator is installed on the top of the sealed box 1. By installing the electrostatic generator, the mica powder can be charged, so that the mica powder is evenly attached to the cable 3, reducing the amount of dust escape and further improving the adhesion effect of the mica powder.

[0048] refer to Figure 1-Figure 2As one implementation method, the side wall or top of the sealed box 1 has two or more ventilation openings, and centrifugal fans are installed on the ventilation openings. The ventilation openings are connected to the dust collection box through the connecting collection pipe. After the cable 3 is coated, the centrifugal fans are set up to cooperate with the sealing structure of the sealed box 1 to form an airflow, which will suck away the excess scattered dust and enter the dust collection box through the collection pipe, thereby achieving a dust-free working environment.

[0049] It should be noted that the centrifugal fan speed is 2000-3000 rpm.

[0050] The steps for using this invention are as follows:

[0051] Step 1: After passing through the electrostatic powder coating machine, the cable 3 is passed through the opening set on the side wall of the sealed box 1 and transported into the sealed box 1;

[0052] Step 2: The first powder coating roller 2 and the second powder coating roller 7 set inside the sealed box 1 provide a certain upward support force to the cable 3 that passes through, so as to prevent the cable 3 from sagging or bending due to gravity. This is because the brushes of the first powder coating roller 2 and the second powder coating roller 7 are made of horse hair. The horse hair has a moderate softness and hardness, and will not generate static electricity that causes mica powder to fall off, nor will it be too hard to scrape off the mica powder.

[0053] Step 3: Excess mica powder falls into the powder receiving box 4. The mica powder is fed from the powder receiving box 4 into the gap between the first powder coating roller 2 and the second powder coating roller 7. With the help of the rotation of the first powder coating roller 2 and the second powder coating roller 7, the powder is evenly coated onto the surface of the cable 3 that passes through.

[0054] Step 4: Determine by manual observation or sensor whether cable 3 passes between the first powder coating roller 2 and the second powder coating roller 7. If yes, it means that cable 3 still needs to be coated, so return to step 1. If no, it means that cable 3 has been coated, so proceed to step 5.

[0055] Step 5: The cable 3, which is evenly coated with mica powder, is output to the sealed box 1. Then, a centrifugal fan is used to suck away the excess scattered dust, thus creating a sealed and dust-free working environment.

[0056] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0057] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dustproof box with a uniformly coated mica powder coating on the cable insulation layer, characterized in that, The device includes a drive mechanism, a sealed box for threading and conveying the cable, and a powder coating roller assembly disposed inside the sealed box for brushing the cable. The powder coating roller assembly includes a first powder coating roller and a second powder coating roller respectively disposed on both sides of the cable and disposed opposite to each other. The first powder coating roller and the second powder coating roller are inclined along the cable entry direction, and the angle between the inclination angle and the cable conveying direction is an acute angle. The drive mechanism is used to drive the first powder coating roller and the second powder coating roller to rotate in opposite directions.

2. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 1, characterized in that, The driving mechanism includes a first drive motor for driving the first powder coating roller to rotate and a second drive motor for driving the second powder coating roller to rotate. Therefore, the first drive motor and the second drive motor are respectively connected to the inside of the sealed box through a first bracket and a second bracket.

3. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 2, characterized in that, A first angle adjustment mechanism for adjusting the angle of the first drive motor is provided between the first bracket and the first drive motor, and a second angle adjustment mechanism for adjusting the angle of the second drive motor is provided between the second bracket and the second drive motor.

4. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 1, characterized in that, The bottom of the sealed box is provided with a powder collection box for collecting mica powder. The side wall of the sealed box facing the powder collection box is provided with a pull-out port for removing the powder collection box. The pull-out port is provided with a folding plate that can open and close the pull-out port.

5. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 1, characterized in that, The outer walls of the first powder coating roller and the second powder coating roller are provided with brushes. Each brush includes a middle section located in the middle of the brush, an edge section located at the edge of the brush, and a transition section located between the middle section and the edge section. The middle section brush is a carbon fiber and nylon composite brush, the edge section brush is a horsehair brush, and the transition section brush is a brush made of horsehair and polyester fiber mixed in a 7:3 ratio.

6. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 4, characterized in that, The powder receiving box is connected to a powder feeding pipe, and one end of the powder feeding pipe away from the powder receiving box extends between the first powder coating roller and the second powder coating roller.

7. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 6, characterized in that, A Venturi pneumatic conveying device and a cyclone separator are connected in sequence between the powder receiving box and the powder feeding pipe, and a screw conveying device is provided at the end of the powder feeding pipe away from the powder receiving box.

8. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 1, characterized in that, The angle between the first powder coating roller and the second powder coating roller along the cable conveying direction and the cable entry direction is 10 degrees to 45 degrees.

9. The dustproof box with uniformly coated mica powder on the cable insulation layer according to claim 1, characterized in that, An electrostatic generator is installed on the top of the sealed box. Two or more ventilation openings are opened on the side wall or top of the sealed box. Centrifugal fans are installed on the ventilation openings. The ventilation openings are connected to the dust collection box through connecting collection pipes.

10. A method for uniformly coating a cable insulation layer with mica powder, characterized in that, The dustproof box using the uniform coating of mica powder on the cable insulation layer according to any one of claims 1 to 9 includes the following steps: Step 1: The cable after passing through the electrostatic powder coating machine is threaded through an opening set on the side wall of the sealed box and transported inside the sealed box; Step 2: The first and second powder coating rollers installed inside the sealed box provide upward support to the passing cable to prevent the cable from sagging or bending due to gravity. Step 3: Excess mica powder falls into the powder receiving box. The mica powder is fed from the powder receiving box into the gap between the first powder coating roller and the second powder coating roller. With the help of the rotation of the first powder coating roller and the second powder coating roller, the powder is evenly coated onto the surface of the cable through which it passes. Step 4: Determine whether the cable has passed between the first and second powder coating rollers by manual observation or sensors. If yes, it means that the cable still needs to be coated, so return to step 1. If no, it means that the cable has been coated, so proceed to step 5. Step 5: The cable output sealing box, which is evenly coated with mica powder, is then sealed with a centrifugal fan to remove excess scattered dust, thus creating a closed and dust-free working environment.

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