Shielding type magnetic core liquid medicine paint remover

Abstract

The invention relates to a shielding type magnetic core liquid medicine paint removing machine which comprises a machine frame, a liquid medicine tank, a high-frequency heating system and an air draft system, the high-frequency heating system comprises a high-frequency main machine and an induction coil, and the induction coil is made of a red copper pipe and arranged on the outer side or the bottom of the liquid medicine tank in a surrounding mode. The end part of the exhaust system is fixedly connected with the high-frequency main machine through a fixing block and penetrates into the high-frequency main machine, the exhaust system comprises an exhaust fan, an exhaust pipeline and a waste liquid recovery port, and the exhaust fan is communicated with the waste gas collection port in the liquid medicine tank through the exhaust pipeline; the waste liquid recovery port is formed in the bottom of the liquid medicine tank and connected with a waste liquid collection device, and a copper plate heat insulation water cooling layer is arranged on the liquid medicine tank. Through reasonable arrangement, the problems of low temperature rise speed, high energy consumption and low heating efficiency of a traditional thermal paint removal mode can be solved, and the production and processing requirements can be met.

Description

Technical Field

[0001] The invention relates to the technical field of liquid chemical paint stripping machines, in particular to a shielded magnetic core liquid chemical paint stripping machine. Background Art

[0002] In the surface treatment process of metal workpieces, paint stripping is an important step to remove old coatings for subsequent processing.

[0003] Temperature control of the magnetic core is crucial during the paint stripping process. Excessively high temperatures can alter the core's internal magnetic domain structure, causing magnetic changes and compromising its performance in electronic devices. Furthermore, excessively high temperatures can cause internal stress in the core due to thermal expansion, leading to physical damage. However, existing paint stripping equipment often lacks effective temperature control, making it impossible to accurately maintain a stable core temperature during the paint stripping process.

[0004] While some paint stripping equipment is equipped with cooling devices, these devices lack effective cooling and are unable to quickly and evenly control temperature. For example, some equipment uses simple air cooling, which is inefficient and unable to cope with the rapid temperature rise during the paint stripping process. Other equipment uses conventional coolant circulation. However, due to the low heat exchange efficiency between the coolant and the paint stripping area and the poor design of the coolant channels, temperature control is uneven, resulting in significant temperature differences between different parts of the magnetic core, affecting the paint stripping effect and core performance.

[0005] In addition, traditional liquid paint stripping equipment generally adopts water bath heating or resistance wire heating. The external heat conduction method leads to large heat loss, slow heating rate, high energy consumption and low heating efficiency; it is impossible to achieve local precise heating, and the paint stripping effect on complex structure workpieces is uneven; the waste gas and waste liquid generated during the paint stripping process lack effective collection and treatment, which can easily cause environmental pollution; the compatibility with different materials (such as steel, aluminum, copper) and coating types is insufficient, and the process parameters need to be adjusted frequently.

[0006] Therefore, there is an urgent need for a liquid paint stripping equipment that has efficient heating, precise temperature control, and environmental protection and safety. Summary of the Invention

[0007] Based on this, it is necessary to provide a shielded magnetic core liquid paint stripping machine to address the above problems.

[0008] A shielded magnetic core paint stripping machine comprises a frame, a paint tank, a high-frequency heating system and an exhaust system, wherein the frame, the paint tank, the high-frequency heating system and the exhaust system are all mounted on the frame.

[0009] The high-frequency heating system includes a high-frequency host and an induction coil. The induction coil is made of a copper tube and is arranged around the outside or bottom of the medicine tank, and the end is connected and fixed to the high-frequency host through a fixed block and penetrates into the high-frequency host. The high-frequency host is used to convert industrial frequency alternating current into a high-frequency current with a frequency range of 20kHz-1MHz, and generate an alternating magnetic field through the induction coil. The exhaust system includes an exhaust fan, an exhaust pipe and a waste liquid recovery port. The exhaust fan is connected to the waste gas collection port on the medicine tank through the exhaust pipe. The waste liquid recovery port is arranged at the bottom of the medicine tank and connected to the waste liquid collection device. A copper plate insulating water cooling layer is provided on the medicine tank.

[0010] In one embodiment, the medicine tank is made of corrosion-resistant materials, including polypropylene, polytetrafluoroethylene or fiberglass; the winding density of the induction coil is 5-10 turns / dm.

[0011] In one embodiment, a water cooler inlet and outlet are symmetrically provided at one end of the high-frequency host away from the medicine tank, and the water cooler inlet and outlet are connected to the end of the induction coil that penetrates the high-frequency host to form a uniform heat exchange path.

[0012] In one embodiment, a workpiece holder is provided in the liquid medicine tank, and the workpiece holder is made of insulating and corrosion-resistant material; a clean water cleaning tank is integrated on one side of the liquid medicine tank, and a drain valve is also provided on one side of the clean water cleaning tank.

[0013] In one embodiment, a steam water storage tank is further provided on the frame, a connecting port matching the exhaust port of the exhaust fan is provided on the steam water storage tank, and a drain valve is further provided on one side of the steam water storage tank.

[0014] In one embodiment, the diameter of the water inlet and outlet of the water cooler is 20-30 mm.

[0015] In one embodiment, a central control screen is also provided on the frame.

[0016] In one embodiment, an anti-corrosion coating is provided on the inner wall of the copper tube of the induction coil, and the anti-corrosion coating material is polyimide or epoxy resin.

[0017] In one embodiment, casters are provided at the four corners of the bottom of the frame, and foot brakes are provided on the casters.

[0018] The beneficial effects of the above-mentioned shielded magnetic core paint stripping machine are as follows:

[0019] High efficiency and energy saving: The efficiency of electromagnetic induction heating is 40%-80% higher than that of traditional heating methods. Endogenous heating reduces heat loss and lowers energy consumption.

[0020] Precise and controllable: It can achieve precise heating of local areas, adapt to the paint stripping needs of complex structure workpieces, and has high temperature control accuracy to ensure uniform paint stripping.

[0021] Environmental protection and safety: no open flame, zero emission, combined with the exhaust system and waste liquid recovery device to reduce waste gas and waste liquid pollution, in line with environmental protection requirements.

[0022] Strong adaptability: By adjusting the frequency parameters of the high-frequency host (intermediate frequency, ultra-high frequency), it can adapt to the paint stripping process requirements of different metal materials (such as steel, aluminum, copper, etc.) and coating types. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 Schematic diagram of the internal structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the present invention from another angle;

[0026] Figure 4 This is a schematic diagram of the structure of the medicine tank of the present invention;

[0027] Figure 5 This is a schematic diagram of the bottom structure of the medicine tank of the present invention;

[0028] Figure 6 This is a structural schematic diagram of the exhaust duct, exhaust fan and steam water storage box of the present invention.

[0029] 1. Frame; 11. Steam water storage tank; 12. Connecting port; 13. Central control panel; 14. Casters; 15. Foot brake; 2. Chemical solution tank; 21. Exhaust gas collection port; 22. Waste liquid recovery port; 3. High-frequency heating system; 31. High-frequency host; 32. Induction coil; 4. Exhaust system; 41. Exhaust fan; 411. Exhaust port; 42. Exhaust duct; 43. Exhaust duct; 5. Fixing block; 6. Water inlet and outlet of water cooler; 7. Workpiece bracket; 8. Drain valve; 9. Copper plate insulation water cooling layer; 10. Clean water cleaning tank. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] As used herein, the term "prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variations thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0032] When amount, concentration or other value or parameter is represented with range, preferred range or the range that a series of upper preferred value and lower preferred value limit are expressed, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value and any range lower limit or preferred value, no matter whether this range is disclosed separately.For example, when disclosing scope "1 to 5", described scope should be interpreted as including scope "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5" etc.When numerical range is described in this article, unless otherwise stated, otherwise this scope is intended to include its end value and all integers and fractions within this range.

[0033] In addition, the indefinite articles "a" and "an" before the elements or components of the present invention do not limit the quantity requirement (i.e., the number of times the elements or components appear). Therefore, "a" or "an" should be interpreted as including one or at least one, and elements or components in the singular also include plural forms, unless the number is obviously intended to be singular.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] See Figures 1-6 A shielded magnetic core paint stripping machine includes a frame 1, a paint tank 2, a high-frequency heating system 3, and an exhaust system 4. The frame 1, the paint tank 2, the high-frequency heating system 3, and the exhaust system 4 are all installed on the frame 1.

[0036] The high-frequency heating system 3 includes a high-frequency host 31 and an induction coil 32. The induction coil 32 is made of a copper tube and is arranged around the outside or bottom of the medicine tank 2, and the end is connected and fixed to the high-frequency host 31 through a fixing block 5 and penetrates into the high-frequency host 31. The high-frequency host 31 is used to convert industrial frequency alternating current into a high-frequency current with a frequency range of 20kHz-1MHz, and generate an alternating magnetic field through the induction coil 32. The exhaust system 4 includes an exhaust fan 41, an exhaust pipe 42 and a waste liquid recovery port 22. The exhaust fan 41 is connected to the waste gas collection port 21 on the medicine tank 2 through the exhaust pipe 42. The waste liquid recovery port 22 is arranged at the bottom of the medicine tank 2 and connected to the waste liquid collection device. A copper plate insulating water cooling layer 9 is provided on the medicine tank 2.

[0037] If the magnetic core is exposed to high temperatures for extended periods, thermal expansion may occur, leading to changes in internal structural stress and even physical damage such as cracks. By providing the copper plate insulating water cooling layer 9 to control the temperature, damage to the magnetic core due to excessive thermal expansion and contraction can be prevented, maintaining the integrity of its mechanical structure. Furthermore, the copper plate's excellent thermal conductivity ensures a more uniform temperature distribution within the paint stripping tank, preventing local overheating or overcooling of the magnetic core. This ensures that the paint stripping reaction proceeds evenly across all parts of the core, resulting in more stable paint stripping quality and preventing incomplete or excessive paint stripping. This ensures consistent paint stripping results on the surface of the core. The waste liquid recovery port 22 is used to discharge used waste liquid to prevent environmental pollution caused by waste liquid leakage.

[0038] Furthermore, the solution tank 2 is made of corrosion-resistant materials, including polypropylene, polytetrafluoroethylene or fiberglass; the winding density of the induction coil 32 is 5-10 turns / dm; the solution tank 2 made of corrosion-resistant materials can effectively resist the chemical corrosion of paint stripping solution and extend the service life of the equipment; by adjusting the output frequency (20kHz-1MHz) and current amplitude of the high-frequency host 31, the overall heating or local precise heating of the metal workpiece can be achieved.

[0039] Furthermore, the high-frequency main unit 31 is symmetrically provided with a water cooler inlet and outlet 6 at one end away from the medicine tank 2, and the water cooler inlet and outlet 6 is connected to the end of the induction coil 32 that penetrates the high-frequency main unit 31, forming a uniform cold and heat exchange path; by setting the connection between the water cooler inlet and outlet 6 and the induction coil 32, the interaction of cold and hot water is carried out, and at the same time, the water cooler inlet and outlet 6 is connected to the output end of the water cooler, thereby achieving efficient control of the medicine temperature.

[0040] Furthermore, a workpiece holder 7 is provided within the chemical bath 2 and is made of an insulating, corrosion-resistant material. A clean water rinse tank 10 is integrated into one side of the chemical bath 2, and a drain valve 8 is also provided on one side of the clean water rinse tank 10. The workpiece holder 7 ensures the stable placement of the workpiece within the chemical bath 2 and ensures effective coupling with the alternating magnetic field generated by the induction coil 32. The clean water rinse tank 10 is also provided for treating the workpiece with clean water after paint stripping, removing residual chemical and coating debris from the workpiece surface. The drain valve 8 is used to remove wastewater after cleaning.

[0041] Furthermore, a steam water storage tank 11 is provided on the frame 1, and a connecting port 12 matching the exhaust port 411 of the exhaust fan 41 is provided on the steam water storage tank 11, and a drain valve 8 is also provided on one side of the steam water storage tank 11; because steam is generated as the temperature rises during the paint stripping process, the steam is drawn into the steam water storage tank 11 through the connecting port 12 and the exhaust fan 41 pipeline by the exhaust fan 41, and the moisture in the steam will remain in the steam water storage tank 11, while the steam is sent out through the exhaust pipe 43 of the exhaust fan 41.

[0042] Furthermore, the diameter of the water inlet and outlet 6 of the water cooler is 20-30 mm;

[0043] Furthermore, the frame 1 is also equipped with a central control panel 13. The central control panel 13 is connected to the control system and is electrically connected to the exhaust fan 41 and the high-frequency main unit 31. The control system integrates a PLC controller or industrial computer. A built-in workpiece material-heating parameter matching algorithm can automatically generate and adjust the output frequency of the high-frequency main unit 31, the cooling water flow of the water chiller, and the operating power of the exhaust fan 41 based on the input workpiece material (steel / aluminum / copper), coating type, and paint stripping area (global / local).

[0044] Furthermore, an anti-corrosion coating is provided on the inner wall of the copper tube of the induction coil 32. The anti-corrosion coating material is polyimide or epoxy resin. By providing the anti-corrosion coating on the inner wall of the copper tube of the induction coil 32, it is helpful to prevent the chemical corrosion of the induction coil 32 by the paint stripping solution.

[0045] Furthermore, casters 14 are provided at the four corners of the bottom of the frame 1, and foot brakes 15 are provided on the casters 14. By providing the casters 14 and the foot brakes 15, the paint stripping machine can be easily transported and fixed.

[0046] It should be noted that the solution in the solution tank 2 is a general-purpose enameled wire thinner (MW-518). During the paint stripping process, the organic solvent in the general-purpose enameled wire thinner dissolves and swells the coating on the enameled wire surface. When the thinner penetrates the gaps between the polymer chains in the coating, it causes the polymer to swell, increasing the volume of the coating film, thereby weakening and destroying the coating film's adhesion to the substrate, ultimately removing the coating film.

[0047] The operating process of the present invention is:

[0048] The metal wire is wound around the magnetic core to form a magnetic core coil. The operator injects a universal thinner for enameled wire (MW-518) into the solution tank 2, and then places the magnetic core coil to be stripped on the workpiece holder 7 in the solution tank 2, ensuring that the end of the coil to be stripped is completely immersed in the paint stripping solution. The operator selects parameters such as the workpiece material (aluminum), coating type (plating) through the central control panel 13. The control system automatically matches the parameters of the high-frequency host 31 (frequency: 20kHz-1MHz, power: dynamically adjusted according to the size of the workpiece), the cooling water flow of the water chiller (maintaining the solution temperature ≤ the set threshold, such as 60°C), and the wind speed of the exhaust fan 41 according to the preset algorithm.

[0049] The high-frequency host 31 converts industrial frequency alternating current (220V / 380V, 50Hz) into high-frequency current and outputs it to the copper tube induction coil 32 surrounding the medicine tank 2. The high-frequency current generates a high-speed alternating magnetic field in the induction coil 32 (the direction of the magnetic field changes 20,000-1 million times per second). The magnetic field penetrates the wall of the medicine tank 2 and covers the metal workpiece inside. The metal coil acts as a conductor to cut the alternating magnetic field. According to the law of electromagnetic induction, an eddy current (closed loop current) is generated inside it in the opposite direction to the current of the induction coil 32. The core coil and its interior heat up rapidly, and the temperature distribution can be controlled by adjusting the winding density of the induction coil 32 (5-10 turns / dm) and the high-frequency frequency (high frequency focuses on surface heating, and medium frequency has a deeper penetration depth).

[0050] If the paint stripping solution heats the workpiece or the ambient temperature rises above a set value (e.g., 70°C), cooling water is delivered through the water chiller's inlet and outlet to the induction coil 32. The hollow interior of the induction coil 32 absorbs heat from the solution tank 2, maintaining the solution temperature within the optimal reaction range (e.g., 50-60°C) to prevent the solution from overheating and becoming ineffective. The heated coating on the coil surface, activated by heat, reacts chemically with the solution. Combined with the solution's swelling and exfoliation properties, the coating rapidly peels off the workpiece surface.

[0051] Steam generated during the paint stripping process is collected by exhaust fan 41 through exhaust duct 42 and transported to the steam water storage tank 11 in real time. Excess steam is discharged through exhaust duct 43 of exhaust fan 41, which is connected to an external waste purification device to prevent air pollution in the workshop. After paint stripping is completed, the waste liquid recovery port 22 at the bottom of the chemical tank 2 is opened, and the spent chemical solution and impurities from the detached coating flow into the waste liquid collection tank. They are then classified, chemically neutralized, filtered, and discharged or recycled after meeting environmental standards.

[0052] Finally, the staff takes the coil out of the chemical tank 2 and transfers it to the clean water cleaning tank 10, where they use a high-pressure water gun or ultrasonic cleaning to remove residual chemical and coating debris in preparation for subsequent processing.

[0053] The beneficial effects of the above-mentioned shielded magnetic core paint stripping machine are as follows:

[0054] High efficiency and energy saving: The efficiency of electromagnetic induction heating is 40%-80% higher than that of traditional heating methods. Endogenous heating reduces heat loss and energy consumption, greatly shortens paint stripping time and improves production efficiency.

[0055] Precise and controllable: It can achieve precise heating of local areas, adapt to the paint stripping needs of complex structure workpieces, and has high temperature control accuracy to ensure uniform paint stripping.

[0056] Environmental protection and safety: no open flame, zero emission, combined with exhaust system 4 and waste liquid recovery device, it reduces waste gas and waste liquid pollution and meets environmental protection requirements.

[0057] Strong adaptability: by adjusting the frequency parameters (intermediate frequency, ultra-high frequency) of the high-frequency host 31, it can adapt to the paint stripping process requirements of different metal materials (such as steel, aluminum, copper, etc.) and coating types.

[0058] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A shielded magnetic core paint stripping machine, characterized in that: It includes a frame, a medicine tank, a high-frequency heating system and an exhaust system, and the frame, the medicine tank, the high-frequency heating system and the exhaust system are all installed on the frame. The high-frequency heating system includes a high-frequency host and an induction coil. The induction coil is made of a copper tube and is arranged around the outside or bottom of the medicine tank, and the end is connected and fixed to the high-frequency host through a fixed block and penetrates into the high-frequency host. The high-frequency host is used to convert industrial frequency alternating current into a high-frequency current with a frequency range of 20kHz-1MHz, and generate an alternating magnetic field through the induction coil. The exhaust system includes an exhaust fan, an exhaust pipe and a waste liquid recovery port. The exhaust fan is connected to the waste gas collection port on the medicine tank through the exhaust pipe. The waste liquid recovery port is arranged at the bottom of the medicine tank and connected to the waste liquid collection device. A copper plate insulating water cooling layer is provided on the medicine tank.

2. A shielded magnetic core paint stripping machine according to claim 1, characterized in that: The medicine tank is made of corrosion-resistant materials, including polypropylene, polytetrafluoroethylene or fiberglass; The winding density of the induction coil is 5-10 turns / dm.

3. A shielded magnetic core paint stripping machine according to claim 2, characterized in that: The high frequency host is symmetrically provided with a water cooler inlet and outlet at one end away from the medicine tank, and the water cooler inlet and outlet are connected to the end of the induction coil passing through the high frequency host to form a uniform heat exchange path.

4. A shielded magnetic core paint stripping machine according to claim 1, characterized in that: A workpiece support is provided in the medicine tank, and the workpiece support is made of insulating and corrosion-resistant material; a clean water cleaning tank is integrated on one side of the medicine tank, and a drain valve is also provided on one side of the clean water cleaning tank.

5. A shielded magnetic core paint stripping machine according to claim 1, characterized in that: The frame is also provided with a steam water storage box, the steam water storage box is provided with a communication port matching the exhaust port of the exhaust fan, and a drain valve is also provided on one side of the steam water storage box.

6. A shielded magnetic core paint stripping machine according to claim 1, characterized in that: The diameter of the water inlet and outlet of the water cooler is 20-30mm.

7. The shielded magnetic core paint stripping machine according to claim 1, characterized in that: A central control screen is also provided on the frame.

8. A shielded magnetic core paint stripping machine according to any one of claims 1 to 7, characterized in that: An anti-corrosion coating is provided on the inner wall of the copper tube of the induction coil, and the anti-corrosion coating material is polyimide or epoxy resin.

9. A shielded magnetic core paint stripping machine according to any one of claims 1 to 7, characterized in that: The four corners of the bottom of the frame are all provided with casters, and the casters are all provided with foot brakes.

Images