Automatic powder spraying machine for TDP patch production
By designing a powder spraying and cleaning device, combined with infrared sensor control, the problem of TDP powder contamination on non-woven fabric was solved, enabling high-quality production of TDP moxibustion patches and ensuring patient health.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING KAIFENG MEDICAL INSTR
- Filing Date
- 2023-12-28
- Publication Date
- 2026-07-24
AI Technical Summary
During the powder spraying process of existing automatic powder spraying machines, TDP powder easily gets stuck on the nonwoven fabric, resulting in poor product quality and affecting patients' health.
An automatic powder spraying machine for TDP dressing production is adopted, including a powder spraying device and a cleaning device. The powder is driven into the TDP radiator by repeatedly tapping the powder filling hopper, and the cleaning device is used to clean the residual powder on the non-woven fabric. The automatic control is achieved by combining infrared sensors.
This effectively avoids TDP powder contamination on the nonwoven fabric, improves the quality of the finished product, and ensures patient safety.
Smart Images
Figure CN117619684B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of moxibustion patch production technology, specifically to an automatic powder spraying machine for TDP patch production. Background Technology
[0002] TDP moxibustion patches are external application devices developed for bone diseases and muscle injuries. From top to bottom, the TDP moxibustion patch consists of pressure-sensitive adhesive tape, a chemical heating layer, and so on. Figure 1 The TDP radiator 2 shown is as follows: Figure 2 The nonwoven fabric 1 shown consists of four parts, with the pressure-sensitive adhesive tape having the largest area and covering the other three parts. At the ends of the pressure-sensitive adhesive tape not covering the nonwoven fabric 1, easily tearable release paper is attached. The end of the TDP radiator 2 closest to the nonwoven fabric 1 is filled with adhesive to bond the TDP powder. The TDP powder is only a thin layer inside the TDP radiator 2. The TDP powder contains various elements, and under the heating and catalytic action of the chemical heating layer, it generates electromagnetic waves containing multiple elements, which are easily absorbed by the human body, producing beneficial biological effects. This enhances the activity of various biological enzymes in the body, improves microcirculation, eliminates inflammation, and relieves pain, thus having an auxiliary therapeutic effect.
[0003] One step in the processing of TDP moxibustion patches is to spray TDP powder into the TDP radiator 2. The product to be processed is as follows: Figure 1 , 2 As shown, it includes only uncut nonwoven fabric 1 and a bowl-shaped PVC material TDP radiator 2 bonded to the back of the nonwoven fabric. A round hole 11 is provided on the nonwoven fabric 1 where it contacts the opening of the TDP radiator 2. The current TDP powder processing steps are to place the semi-finished product on the conveyor belt with the round hole 11 facing upwards, and then set a funnel-shaped powder spraying device at the top of the conveyor belt. The powder spraying device is filled with TDP powder. When spraying powder, the TDP powder falls from top to bottom and enters the TDP radiator 2 through the round hole 11.
[0004] Most of the existing automatic powder spraying machines use the above-mentioned scattered powder spraying. In practical applications, a problem that easily arises is that TDP powder will fall into the TDP radiator 2 and also get everywhere on the non-woven fabric 1. Since the non-woven fabric 1 needs to come into direct contact with the human body during use, there cannot be any TDP powder residue. How to avoid TDP powder contamination on the non-woven fabric 1 is a technical problem that urgently needs to be solved. Summary of the Invention
[0005] The present invention aims to provide an automatic powder spraying machine for TDP dressing production, which can solve the technical problem that non-woven fabrics are easily contaminated with TDP powder during the powder spraying process.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An automatic powder spraying machine for TDP dressing production includes a conveying device for transporting products to be processed and a base for support. The base includes a first gantry, a second gantry, and a third gantry. It also includes a powder spraying device mounted on the second gantry and a cleaning device mounted on the third gantry. The powder spraying device includes a powder filling hopper for storing TDP powder and a tapping assembly located below the powder filling hopper for repeatedly striking the hopper. A cover plate is fixedly installed on the top of the powder filling hopper, and a through powder feeding port is formed on the cover plate, with the powder feeding port facing upwards. The powder feeding port is positioned below the product to be processed. The diameter of the powder feeding port is larger than the diameter of the circular hole opened on the nonwoven fabric. A first clamping assembly for pressing down the TDP radiator is fixedly installed above the cover plate. The first clamping assembly is fixedly connected to the top of the second gantry. The cleaning device includes a cleaning brush for cleaning residual TDP powder on the nonwoven fabric, a first single-acting cylinder for driving the cleaning brush, and a second clamping assembly fixedly installed above the cleaning brush for pressing down the TDP radiator. The second clamping assembly is fixedly connected to the top of the third gantry.
[0008] The principles and advantages of this scheme are:
[0009] 1. In practical applications, the nonwoven fabric with the TDP radiator attached is conveyed forward by the conveying device. When the circular hole on the nonwoven fabric aligns with the powder feeding port on the cover plate, the first pressing component is activated and descends to the height of the TDP radiator to fix and press it. Then, the tapping component repeatedly poundes the bottom of the powder filling chamber from bottom to top. At this time, the TDP powder pre-filled in the filling chamber is thrown upward under the action of vibration. Some of the TDP powder will be fed into the TDP radiator through the powder feeding port. Since the TDP radiator is pre-coated with fixing adhesive, the TDP powder will firmly adhere to the inner wall of the bowl-shaped TDP radiator. Although some of the thrown TDP powder will come into contact with the nonwoven fabric during this process, since the nonwoven fabric itself has no adhesiveness, this part of the TDP powder is subject to its own weight. Under the influence of force and vibration from the tapping component, the powder will naturally fall back into the powder filling chamber. It is worth mentioning that the diameter of the powder feeding port is larger than the diameter of the circular hole on the non-woven fabric. This is to ensure that sufficient TDP powder rises and enters the TDP radiator. If the diameter of the powder feeding port is set smaller than the diameter of the circular hole on the non-woven fabric, the powder spraying process may be slow, which will prolong the production time and fail to guarantee the quality of the finished TDP patch. This solution replaces the traditional top-down scattered powder spraying method by repeatedly tapping the powder filling chamber from the bottom. This can ensure that the non-woven fabric is not contaminated with TDP powder during the TDP powder spraying process, which has a positive impact on the quality of the finished TDP moxibustion patch. Using this automatic powder spraying machine to produce TDP moxibustion patches is an important measure to ensure the health of patients.
[0010] 2. Since not all TDP powder can firmly adhere to the TDP radiator, it is necessary to clean it with a cleaning device after powder spraying using the powder spraying device. This helps improve the quality of the finished TDP moxibustion patch. The specific cleaning process is as follows: after the TDP radiator has completed the powder spraying process, it continues to be conveyed forward under the drive of the conveying device. When the round hole on the non-woven fabric aligns with the cleaning brush, the second pressing component is activated and lowered to the height of the TDP radiator to fix and press the TDP radiator. Then, the first single-acting cylinder drives the cleaning brush to brush back and forth on the surface of the round hole to clean the TDP powder with weak adhesion, preventing the TDP powder from easily falling and coming into contact with the skin during the patient's use of the TDP patch.
[0011] Preferably, as an improvement, it also includes a control device, which includes a controller and an infrared sensor for sensing the position of the TDP radiator. The controller is electrically connected to the powder spraying device, the cleaning device, the conveying device, and the infrared sensor, respectively.
[0012] Beneficial effects: The control device plays a key role in the start-up and operation of the powder spraying device, cleaning device, and conveying device. Since the TDP radiators on the non-woven fabric are set at equal intervals, an infrared sensor is set up to identify and position the TDP radiators to be processed, thereby realizing the automated operation of the powder spraying and cleaning process.
[0013] Preferably, as an improvement, the striking assembly includes a second single-acting cylinder and a striking plate fixedly mounted on the top of the second single-acting cylinder.
[0014] Beneficial effects: The tapping assembly relies on a second single-acting cylinder to drive the tapping plate to rise and fall, thereby repeatedly tapping the bottom of the powder filling chamber to generate vibration and promote the powder spraying process.
[0015] Preferably, as an improvement, the conveying device includes a traction assembly installed between the powder spraying device and the cleaning device, and a roller mounted on a base for winding the nonwoven fabric, the traction assembly being electrically connected to a controller.
[0016] Beneficial effects: The traction of the nonwoven fabric is achieved through the cooperation of the traction component and the roller, resulting in a simple and efficient structure.
[0017] Preferably, as an improvement, the traction assembly includes a slide, a motion panel slidably connected to the slide, and a fixed panel fixedly connected to the slide, with a pair of clamping elements mounted on both the motion panel and the fixed panel.
[0018] Beneficial effects: The non-woven fabric is clamped by clamping elements, and then the non-woven fabric is pulled towards the cleaning device by the moving panel that is slidably connected to the slide table. Compared with the ordinary conveyor belt method, the clamping of the non-woven fabric by clamping elements can prevent the non-woven fabric from shaking on it. At the same time, the cooperation of the clamping elements on the moving panel and the fixed panel can make the non-woven fabric straighten during the pulling process, making the surface of the non-woven fabric smoother and wrinkle-free.
[0019] Preferably, as an improvement, the controller is a PLC.
[0020] Beneficial effects: As a general-purpose industrial automatic control device, PLC has a series of advantages such as high reliability, small size, powerful functions, simple programming, flexibility and versatility, and convenient maintenance.
[0021] Preferably, as an improvement, the first clamping assembly includes a third single-acting cylinder and a clamping plate fixedly installed at the bottom of the third single-acting cylinder.
[0022] Beneficial effect: The clamping plate is driven by the third single-acting cylinder to descend to the height of the TDP radiator to clamp the TDP radiator.
[0023] Preferably, as an improvement, a layer of foam cotton is adhered to the underside of the clamping plate.
[0024] Beneficial effect: After attaching a layer of foam cotton under the clamping plate, no indentation will be produced on the surface of the TDP radiator during the clamping process, which is an important means to improve the product molding quality.
[0025] Preferably, as an improvement, the powder filling hopper has an inverted truncated pyramid structure, and the area of the bottom surface of the powder filling hopper is smaller than the area of the top surface of the tapping plate.
[0026] Beneficial effects: The bottom of the powder filling chamber is in direct contact with the tapping plate. If the area of the bottom surface of the powder filling chamber is larger than the area of the top surface of the tapping plate, the problem may be that the bottom surface of the powder filling chamber is subjected to uneven force during the tapping process. This will cause the TDP powder at the edge of the powder filling chamber to not rise sufficiently, and the final result is that the TDP powder bonded in the TDP radiator is not uniform. By limiting the area of the bottom surface of the powder filling chamber, it is beneficial to ensure the final quality of the TDP application product. Attached Figure Description
[0027] Figure 1 This is a front view of the nonwoven fabric with a TDP radiator in Embodiment 1 of the present invention;
[0028] Figure 2 for Figure 1 Top view;
[0029] Figure 3 This is an isometric view of Embodiment 1 of the present invention;
[0030] Figure 4 for Figure 1 Axonometric view of the powder spraying device;
[0031] Figure 5 for Figure 1 Axonometric view of the central cleaning device;
[0032] Figure 6 for Figure 1 Axonometric view of the traction component. Detailed Implementation
[0033] The following detailed description illustrates the specific implementation method:
[0034] The reference numerals in the accompanying drawings include: non-woven fabric 1, round hole 11, TDP radiator 2, conveying device 3, head roller 31, tail roller 32, auxiliary roller 33, slide table 34, moving panel 35, fixed panel 36, moving element 37, L-shaped plate 371, sliding plate 372, stationary element 38, base 4, outer shell 41, baffle 42, first gantry frame 43, second gantry frame 44, third gantry frame 45, powder spraying device 5, powder filling hopper 51, cover plate 52, powder feeding port 53, first pressing assembly 54, third single-acting cylinder 541, pressing plate 542, beating assembly 55, cleaning device 6, cleaning brush 61, first single-acting cylinder 62, second pressing assembly 63, control device 7, infrared sensor 71.
[0035] The basic combination of the embodiments Figures 1-6 As shown:
[0036] An automatic powder spraying machine for TDP dressing production, such as Figure 3 As shown, it includes a conveying device 3 for conveying nonwoven fabric 1, a base 4 for support, a powder spraying device 5 for spraying TDP powder, a cleaning device 6 placed after the powder spraying device 5, and a control device 7 for controlling the operation of the automatic powder spraying machine.
[0037] The base 4 is a base structure that firmly fixes the automatic powder spraying machine to the ground. It includes a shell 41, baffles 42 fixedly installed on both sides of the shell 41, and a first gantry 43, a second gantry 44, and a third gantry 45 fixedly installed on the top of the shell 41.
[0038] The control device 7 includes a controller mounted on the housing 41 and an infrared sensor 71 for sensing the position of the TDP radiator 2. The controller is a PLC, and the infrared sensor 71 is a color mark sensor (kt-rg22) and is mounted on the first gantry 43. Specifically, it is fixed by screws on a longitudinal connecting plate. A switch button is set on the controller to control the start and stop of the conveying device 3. The controller is electrically connected to the powder spraying device 5, the cleaning device 6, the conveying device 3, and the infrared sensor 71.
[0039] like Figure 4As shown, the powder spraying device 5 is installed on the second gantry 44. The powder spraying device 5 includes a powder filling bin 51 for storing TDP powder and a tapping component 55 located below the powder filling bin 51 for repeatedly tapping the powder filling bin 51. The powder filling bin 51 has an inverted truncated pyramid structure that is wider at the top and narrower at the bottom. The top of the powder filling bin 51 is open and the bottom is closed. A cover plate 52 is fixedly installed on the top of the powder filling bin 51 with screws. The cover plate 52 is a quadrilateral metal plate that can completely cover the top of the powder filling bin 51. A powder feeding port 53 is opened on the cover plate 52 at a position corresponding to the top opening of the powder filling bin 51. The shape of the powder feeding port 53 should be adapted to the shape of the product to be processed. In this embodiment, the nonwoven fabric 1 to be processed has a circular hole 11. Therefore, the powder feeding port 53 should also be set as a circular hole 11, but the diameter of the powder feeding port 53 is required to be larger than the circular hole 11 on the nonwoven fabric 1. The diameter of hole 11; A first clamping assembly 54 for pressing down the TDP radiator 2 is fixedly installed above the cover plate 52. The first clamping assembly 54 includes a third single-acting cylinder 541 and a clamping plate 542 fixedly installed at the bottom of the third single-acting cylinder 541. At the output end of the third single-acting cylinder 541 is a piston rod that can perform telescopic movements. A connecting plate is added between the piston rod and the clamping plate 542 for fixing the clamping plate 542. A layer of foam cotton is glued to the bottom of the clamping plate 542; The tapping assembly 55 includes a second single-acting cylinder and a tapping plate fixedly installed at the top of the second single-acting cylinder. The area of the top surface of the tapping plate should be larger than the area of the bottom surface of the powder filling chamber 51 so that the tapping plate can completely cover the bottom surface of the powder filling chamber 51 when it contacts the powder filling chamber 51. The structure of the second single-acting cylinder is the same as that of the third single-acting cylinder 541.
[0040] like Figure 5 As shown, the cleaning device 6 is installed on the third gantry 45. The cleaning device 6 includes a cleaning brush 61 for cleaning TDP powder residue on the nonwoven fabric 1, a first single-acting cylinder 62 for driving the cleaning brush 61, and a second clamping assembly 63 fixedly installed above the cleaning brush 61 to press down the TDP radiator 2. The structure of the first single-acting cylinder 62 is the same as that of the third single-acting cylinder 541. The difference is that the first single-acting cylinder 62 is installed horizontally on the right side of the base 4. The output end of the first single-acting cylinder 62 is fixedly connected to a cleaning brush 61 facing the second clamping assembly 63 by screws. The movement trajectory of the cleaning brush 61 is to move left and right under the action of the first single-acting cylinder 62 to brush the bottom surface of the nonwoven fabric 1. The structure of the second clamping assembly 63 is the same as that of the first clamping assembly 54.
[0041] The conveying device 3 includes a traction assembly installed between the powder spraying device 5 and the cleaning device 6, and rotatable head roller 31 and tail roller 32 mounted on baffles 42 on both sides of the base 4 for winding the nonwoven fabric 1, as well as auxiliary rollers 33 fixedly installed on the sides of the rollers and tail roller 32; the traction assembly includes, for example, Figure 6As shown, the system includes a slide 34 installed inside the housing 41, a motion panel 35 slidably connected to the slide 34, and a fixed panel 36 fixedly connected to the slide 34. The slide 34 is an electric slide 34 driven by a motor, and the motor is electrically connected to the controller. A slide rail is provided on the top of the slide 34, and the motion panel 35 is slidably connected to the slide rail. A pair of clamping elements are installed on both the motion panel 35 and the fixed panel 36. Taking the clamping element on the motion panel 35 as an example, the clamping element includes an L-shaped plate 371 fixed on the motion panel 35, a slide groove opened on the inner side of the L-shaped plate 371, and a sliding plate 372 slidably connected in the slide groove. The sliding plate 372 is driven by a linear cylinder installed above it. For easy distinction, the clamping element on the motion panel 35 is called the motion element 37, and the clamping element on the fixed panel 36 is called the stationary element 38. Both can stably clamp the nonwoven fabric 1. The state of clamping the nonwoven fabric 1 is called the clamping state, and the state of not clamping the nonwoven fabric 1 is called the loose state.
[0042] The specific application process is as follows:
[0043] In use, the two ends of the nonwoven fabric 1 with the TDP radiator 2 attached are manually wound around the head roller 31 and tail roller on both sides of the base 4, ensuring that the middle of the nonwoven fabric 1 is placed in the area of the traction assembly. Then, the switch on the controller is pressed to start the traction assembly to pull the nonwoven fabric 1. During the traction process, the stationary element 38 is in a loose state, and the moving element 37 is in a clamping state and slides towards the stationary element 38 under the drive of the moving panel 35 to pull the nonwoven fabric 1. After one traction is completed, the stationary element 38 is in a clamping state, and the moving element 37 is in a loose state and slides back to its original position, away from the stationary element 38. When the round hole 11 on the nonwoven fabric 1 corresponds to the powder feeding port 53 on the cover plate 52... At this time, the first pressing component 54 is activated and descends to the height of the TDP radiator 2 to fix and press the TDP radiator 2. Then, the tapping component 55 repeatedly taps the bottom of the powder filling chamber 51 from bottom to top. In this embodiment, the tapping process lasts for 2 seconds. During this time, the TDP powder pre-filled in the filling chamber is thrown upward under the action of vibration. Some of the TDP powder will be sent into the TDP radiator 2 through the powder feeding hole. Since the TDP radiator 2 is pre-coated with fixing adhesive, the TDP powder will firmly adhere to the inner wall of the bowl-shaped TDP radiator 2. Although some of the thrown TDP powder will come into contact with the non-woven fabric 1 during this process, since the non-woven fabric 1 itself has no adhesiveness, this part of the TDP powder is affected by its own gravity and the tapping component 55. The vibration caused by the spraying device 5 will cause the powder to fall back into the powder filling hopper 51 naturally. Since not all TDP powder can adhere firmly to the TDP radiator 2, after spraying with the powder spraying device 5, it is cleaned by the cleaning device 6. The specific cleaning process is as follows: when the round hole 11 on the non-woven fabric 1 corresponds to the cleaning brush 61, the second pressing component 63 is activated and lowered to the height of the TDP radiator 2 to fix and press the TDP radiator 2. Then, the first single-acting cylinder 62 drives the cleaning brush 61 to brush back and forth on the surface of the round hole 11. In this embodiment, the cleaning brush 61 needs to be moved back and forth twice to clean the TDP powder with weak adhesion, so as to prevent the TDP powder from falling and coming into contact with the skin during the patient's use of the TDP patch. Whether it's the powder spraying process or the cleaning process, the control device 7 plays a very important role. Since the TDP radiators 2 on the nonwoven fabric 1 are all equally spaced, an infrared sensor 71 (color mark sensor) is set up to identify and locate the position of the TDP radiator 2 to be processed. The TDP powder and TDP radiators 2 are black, while the nonwoven fabric 1 is white. When the infrared sensor 71 locates a TDP radiator 2, the controller will control the conveying device 3 to stop conveying the nonwoven fabric 1. At this time, the other two round holes 11 on the nonwoven fabric 1 correspond to the cleaning brush 61 and the powder feeding hole, respectively. After the powder spraying process and the cleaning process are completed, the controller controls the conveying device 3 to continue conveying the nonwoven fabric 1, realizing the automated operation of the powder spraying and cleaning process.
[0044] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. An automatic powder coating machine for TDP (Total Polymer Dioxide) coating production, comprising a conveying device for conveying products to be processed and a base for support, the base comprising a first gantry, a second gantry, and a third gantry, characterized in that: It also includes a powder spraying device installed on the second gantry and a cleaning device installed on the third gantry; The powder spraying device includes a powder filling bin for storing TDP powder and a tapping component located below the powder filling bin for repeatedly tapping the powder filling bin. A cover plate is fixedly installed on the top of the powder filling bin, and a through powder feeding port is opened on the cover plate. The powder feeding port is arranged facing upward and located below the product to be processed. The diameter of the powder feeding port is larger than the diameter of the circular hole opened on the non-woven fabric. A first pressing component for pressing down the TDP radiator is fixedly installed above the cover plate. The first pressing component is fixedly connected to the top of the second gantry. The cleaning device includes a cleaning brush for cleaning TDP powder residue on non-woven fabric, a first single-acting cylinder for driving the cleaning brush, and a second clamping assembly fixedly installed above the cleaning brush for pressing down the TDP radiator. The second clamping assembly is fixedly connected to the top of the third gantry.
2. The automatic powder spraying machine for TDP dressing production according to claim 1, characterized in that: It also includes a control device, which includes a controller and an infrared sensor for sensing the position of the TDP radiator. The controller is electrically connected to the powder spraying device, the cleaning device, the conveying device, and the infrared sensor.
3. An automatic powder spraying machine for TDP dressing production according to claim 2, characterized in that: The striking assembly includes a second single-acting cylinder and a striking plate fixedly mounted on the top of the second single-acting cylinder.
4. An automatic powder spraying machine for TDP dressing production according to claim 3, characterized in that: The conveying device includes a traction assembly installed between the powder spraying device and the cleaning device, and a roller mounted on the base for winding the nonwoven fabric. The traction assembly is electrically connected to the controller.
5. An automatic powder spraying machine for TDP dressing production according to claim 4, characterized in that: The traction assembly includes a slide, a motion panel slidably connected to the slide, and a fixed panel fixedly connected to the slide. Each of the motion panel and the fixed panel is equipped with a pair of clamping elements.
6. An automatic powder spraying machine for TDP dressing production according to claim 5, characterized in that: The controller is a PLC.
7. An automatic powder spraying machine for TDP dressing production according to claim 6, characterized in that: The first clamping assembly includes a third single-acting cylinder and a clamping plate fixedly installed at the bottom of the third single-acting cylinder.
8. An automatic powder spraying machine for TDP dressing production according to claim 7, characterized in that: A layer of foam cotton is adhered to the underside of the clamping plate.
9. An automatic powder spraying machine for TDP dressing production according to claim 8, characterized in that: The powder filling chamber has an inverted truncated pyramid structure, and the area of the bottom surface of the powder filling chamber is smaller than the area of the top surface of the tapping plate.