Dry lacquer processing device and processing method

Abstract

The invention discloses a dry lacquer processing device and a dry lacquer processing method, relates to the technical field of medicine processing, and solves the technical problem of non-uniform heating of two surfaces of dry lacquer during calcining in the prior art. According to the technical key points, the device comprises a calcining furnace, the calcining furnace comprises an inner container and an outer container, and the inner container is arranged in the outer container; a second rotating shaft is arranged at the other end of the inner container; the first rotating shaft and the second rotating shaft penetrate through the outer container and extend out; the first rotating shaft and the second rotating shaft are supported by a second bracket group, and the first rotating shaft and the second rotating shaft are rotationally connected with the second bracket group; the first rotating shaft is connected with a driving mechanism, and the driving mechanism drives the first rotating shaft to rotate; a heating wire is arranged in the outer container, and the heating wire is spirally wound in the outer container; a plurality of sets of partition plates are arranged in the inner container in the axial direction, each set of partition plates are arranged in an array mode in the circumferential direction of the inner container, and angles are formed between the partition plates and the radial direction of the inner container.

Description

Technical Field

[0001] This invention relates to the field of drug processing technology, specifically to a dry lacquer processing apparatus and processing method. Background Technology

[0002] Traditional Chinese medicine lacquer is the dried resin of the lacquer tree (Anacardia champaca), a plant belonging to the Anacardiaceae family. It has significant pharmaceutical value in the medical field. Raw lacquer contains highly irritating and sensitizing components such as urushiol and urushiol lactone. Direct use may cause skin allergies, mucosal damage, gastrointestinal discomfort, and even liver and kidney burden. Therefore, raw lacquer needs to undergo processing, especially calcination or roasting, to decompose or transform the toxic components before it can be used as lacquer.

[0003] The methods for preparing dried lacquer mainly include traditional and modern processing techniques. Traditional processing, also known as stir-frying, requires manual labor, is physically demanding, and is not suitable for mass production. Modern processing, known as calcination, involves placing the raw lacquer in a calcining pot or furnace, ensuring an oxygen-deficient environment, and then heating the pot or furnace to produce the dried lacquer. Calcination requires strict temperature control; otherwise, uneven heating can easily lead to the lacquer becoming over-scorched.

[0004] Chinese patent CN221692042U discloses a temperature-controlled calcining furnace, comprising: a furnace base mechanism; the furnace base mechanism includes a load-bearing seat, and the load-bearing seat includes a worm gear; a furnace control mechanism; the furnace control mechanism includes a side shaft frame, the worm gear is fixedly mounted on the outer wall of one end of the side shaft frame; a load-bearing rotating rod is rotatably mounted on the inner side of the other end of the side shaft frame, one end of the load-bearing rotating rod rotatably passes through the side shaft frame, and a worm gear is fixedly mounted on its outer wall, the worm gear meshing with a worm, and one end of the worm is connected to a motor. This technology uses a drive mechanism to slowly rotate the furnace body, circulating and turning the Chinese medicine inside the furnace body, reducing the problem of uneven heating of Chinese medicinal materials during calcination.

[0005] However, during the rotation of the medicine furnace, due to the influence of gravity, the medicine inside slides down to the bottom after rotating and sliding a certain distance along the inner wall of the furnace. This may prevent the furnace from turning over and thus fail to achieve the purpose of alternating heating on both sides. Summary of the Invention

[0006] The purpose of this invention is to provide:

[0007] A dry lacquer processing apparatus and method are provided to solve the technical problem of uneven heating on both sides during the calcination of dry lacquer in the prior art.

[0008] Terminology Explanation: Unless otherwise defined, all technical terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this subject matter pertains. Unless otherwise stated, all patents, patent inventions, and disclosures cited throughout this document are incorporated herein by reference in their entirety. Where multiple definitions exist for terms herein, the definitions provided in this chapter shall prevail.

[0009] It should be understood that the above brief description and the following detailed description are exemplary and for illustrative purposes only, and do not limit the subject matter of the invention in any way. In this invention, the singular is used in conjunction with the plural unless otherwise specifically stated. It should also be noted that, unless otherwise stated, the use of “or” or “or” means “and / or”. Furthermore, the use of the term “comprising” and other forms such as “including,” “containing,” and “contains” are not limiting.

[0010] Unless specifically defined herein, the use of various commercially available products herein employs standard techniques. For example, they may be implemented using the manufacturer's instructions for use, or in accordance with methods known in the art or the description of this invention. The techniques and methods described herein can generally be implemented according to conventional methods well known in the art, based on the descriptions in the various general and more specific documents cited and discussed in this specification.

[0011] The terms “optional / arbitrary” or “optionally / arbitrarily” mean that the event or situation described below may or may not occur, including both the occurrence and non-occurrence of the event or situation.

[0012] In a first aspect, the present invention provides a dry lacquer processing apparatus, comprising a calcining furnace, the calcining furnace comprising an inner liner and an outer liner, the inner liner being disposed inside the outer liner; the outer liner being supported by a first support assembly, a first rotating shaft being disposed at one end of the inner liner, and a second rotating shaft being disposed at the other end; both the first rotating shaft and the second rotating shaft extending through the outer liner; the first rotating shaft and the second rotating shaft being supported by a second support assembly, and both the first rotating shaft and the second rotating shaft being rotatably connected to the second support assembly; the first rotating shaft being connected to a driving mechanism, the driving mechanism driving the first rotating shaft to rotate; The outer liner is equipped with a heating wire spirally wound inside it; the inner liner is equipped with multiple sets of partitions arranged axially, each set of partitions being arranged in an array around the circumference of the inner liner, and the partitions being at an angle to the radial direction of the inner liner. .

[0013] Furthermore, angle The value range is 10°-22°.

[0014] Furthermore, each set of partitions has three partitions arranged in a circumferential array, with adjacent partitions differing by 120°.

[0015] Furthermore, the circumferential direction of two adjacent sets of partitions inside the inner liner differs by 60° between one partition in one set and an adjacent partition in the other set.

[0016] Furthermore, a central hole is provided at the axis of the second rotating shaft, and a smoke exhaust pipe is inserted through the central hole. The smoke exhaust pipe is rotatably and sealingly connected to the inner wall of the central hole.

[0017] Furthermore, the exhaust pipe extends deep into the inner liner, and its length inside the inner liner is at least half the total length of the inner liner.

[0018] Furthermore, multiple smoke inlets are provided on the outer wall of the exhaust pipe.

[0019] Furthermore, there is a gap between the inner wall of the outer liner and the outer wall of the inner liner. A plurality of rolling supports are provided at the bottom of the inner wall of the outer liner. Each rolling support includes a rolling support seat, which is arranged circumferentially along the inner wall of the outer liner. A plurality of balls are embedded on the inner surface of the rolling support seat, and the balls are able to roll within the rolling support seat. The upper surface of the balls contacts the outer wall of the inner liner.

[0020] Furthermore, the drive mechanism includes a motor, with a drive sprocket mounted on the output shaft of the motor; a driven sprocket is mounted on the first rotating shaft, and a chain is arranged around the drive sprocket and the driven sprocket.

[0021] Furthermore, the first support assembly includes two first supports, each of which includes a first support rod and a first circumferential rod; the first circumferential rod is arc-shaped and is circumferentially arranged on the outer surface of the outer liner; the first support rod is disposed below the first circumferential rod and is fixedly connected to the first circumferential rod.

[0022] Furthermore, the second support group includes two second supports, the upper end of the second support is provided with a bearing hole, a bearing is provided in the bearing hole, and a first rotating shaft or a second rotating shaft passes through the bearing.

[0023] Furthermore, both the first support group and the second support group are mounted on the substrate.

[0024] Secondly, the present invention also provides a method for processing dry lacquer, wherein the above-mentioned dry lacquer processing apparatus is used to process the dry lacquer, and the method specifically includes: S1. Preheat the inner liner to temperature T1; S2. Open the inner liner, put in the dried lacquer to be processed, and seal the inner liner. S3. Heat the inner liner to temperature T2. During the heating process, start the drive mechanism to make the inner liner rotate. S4. Detect the smoke concentration in the exhaust pipe. When the smoke concentration is lower than the smoke threshold, the heating wire is de-energized. S5. The dried lacquer obtained after natural cooling.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects: This invention employs a horizontal forging furnace, which includes an outer liner and an inner liner. A drive mechanism rotates the inner liner, causing the dry lacquer inside to rotate, thus avoiding the dead zones present in existing stirring methods. Furthermore, a baffle plate flips the dry lacquer, ensuring even heating on both sides. The resulting dry lacquer exhibits a distinct gloss, uniform color, light weight, and a brittle, easily broken texture.

[0026] Combined with the processing method of the present invention, the total ash content of the dry varnish obtained by the present invention is less than 5.5%, and the acid-insoluble ash content is less than 2%, and the ash content test results are far superior to the pharmacopoeia standard. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional arrangement of the internal partitions of the inner liner; Figure 3 The diagrams show the characteristics of three types of dried lacquer, where (a) represents raw dried lacquer, (b) represents purchased calcined dried lacquer, and (c) represents calcined dried lacquer processed using the technical solution of this invention. Figure 4 The diagram shows the color changes of three types of dry varnish after physicochemical analysis.

[0028] Explanation of reference numerals in the attached figures: 1. Inner liner, 2. Outer liner, 3. First rotating shaft, 4. Second rotating shaft, 5. Heating wire, 6. Partition plate, 7. Exhaust pipe, 8. Rolling support seat, 9. Ball bearing, 10. Motor, 11. Drive sprocket, 12. Driven sprocket, 13. Chain, 14. First bracket, 15. Second bracket, 16. Base plate. Detailed Implementation

[0029] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the invention in any way. The following content is merely an exemplary description of the scope of protection claimed by the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, and such changes should also fall within the scope of protection claimed by the present invention.

[0030] Example 1 This embodiment provides a dry lacquer preparation apparatus, such as... Figure 1As shown, a forging furnace is included, which is entirely disposed above a base plate 16. The forging furnace includes an inner liner 1 and an outer liner 2, both of which are cylindrical. The inner liner 1 is disposed inside the outer liner 2, meaning the outer liner 2 completely encloses the inner liner 1. Both the inner liner 1 and the outer liner 2 are provided with inlet gates for feeding material. Figure 1 As shown on the right end. The inner liner 1's door and inner liner 1's body are connected by a sealed and fastened connection; for example, a sealing strip and screws can be used for the connection. The outer liner 2's door and outer liner 2's body are also connected by a sealed and fastened connection.

[0031] The outer liner 2 is supported by a first set of brackets 14. The left end of the inner liner 1 is fixedly connected to a first rotating shaft 3, and the right end, i.e., the outer surface of the inner liner 1's opening, is fixedly connected to a second rotating shaft 4. Both the first rotating shaft 3 and the second rotating shaft 4 are located at the horizontal central axis of the inner liner 1. Both the first rotating shaft 3 and the second rotating shaft 4 extend through the outer liner 2. The first rotating shaft 3 and the second rotating shaft 4 are supported by a second set of brackets 15, and both the first rotating shaft 3 and the second rotating shaft 4 are rotatably connected to the second set of brackets 15. In addition, both the first rotating shaft 3 and the second rotating shaft 4 are rotatably connected to the side wall of the outer liner 2, preferably with a rotatable sealing connection.

[0032] The first rotating shaft 3 is connected to a driving mechanism, which drives the first rotating shaft 3 to rotate; a heating wire 5 is provided inside the outer liner 2, and the heating wire 5 is spirally wound inside the outer liner 2; multiple sets of partitions 6 are arranged axially inside the inner liner 1, such as... Figure 2 As shown, each set of partitions 6 is arranged in a circumferential array along the inner liner 1, and the partitions 6 and the inner liner 1 are at an angle to each other radially. .

[0033] Preferred angle The value range is 10°-22°. The length of the partition 6 is 0.28-0.34 times the diameter of the inner liner 1. Each group of partitions 6 has three partitions 6 arranged in a circumferential array, with adjacent partitions 6 differing by 120°. For example... Figure 2 As shown, the inner liner 1 rotates clockwise, and the dried paint rotates along with the partition 6. When the partition 6 rotates from the bottom to the top of the inner liner 1, the dried paint slides off the partition 6. During the sliding process, it may collide with other partitions 6, or it may slide directly into the center or bottom space of the inner liner 1. Throughout the entire tumbling process, both sides of the dried paint have a period of contact with or close to the side wall of the inner liner 1, thus achieving the goal of uniform heating on both sides of the dried paint and effectively increasing the degree of heating uniformity. In addition, the horizontal rotation of the inner liner 1 can achieve the tumbling of all the dried paint, thereby avoiding the problem of dead zones in stirring methods.

[0034] When the inner liner 1 is set to rotate counterclockwise, the partition 6 is also simultaneously set to be biased to the right radially.

[0035] To increase the degree of internal flipping, multiple sets of partitions 6 are arranged inside the inner liner 1 along the horizontal central axis. Between adjacent sets of partitions 6 inside the inner liner 1, the circumferential angle between one partition 6 in one set and an adjacent partition 6 in another set is 60°. This allows the dried paint to potentially fall and collide between adjacent partitions 6 in the horizontal direction, thereby increasing the probability of flipping.

[0036] like Figure 2 As shown, the inner liner 1 is provided with three sets of partitions 6. Each set of partitions 6 contains three partitions, and the adjacent partitions 6 in each set of partitions 6 are 120° apart in the circumferential direction. Between two adjacent sets of partitions 6, the partitions 6 in one set of partitions 6 and the adjacent partitions 6 in the other set of partitions 6 are 60° apart in the circumferential direction.

[0037] A central hole is provided at the axis of the second rotating shaft 4, and a smoke exhaust pipe 7 passes through the central hole. The smoke exhaust pipe 7 is rotatably and sealingly connected to the inner wall of the central hole. The smoke exhaust pipe 7 is used to exhaust the smoke generated inside the inner liner 1. The smoke exhaust pipe 7 extends deep into the inner liner 1, and its length inside the inner liner 1 is at least half of the total length of the inner liner 1.

[0038] The outer wall of the exhaust pipe 7 is provided with multiple smoke inlets, and the end of the exhaust pipe 7 located inside the inner liner 1 also has a smoke inlet. The smoke inlets can be circular or other shapes.

[0039] A gap exists between the inner wall of the outer liner 2 and the outer wall of the inner liner 1. Multiple rolling supports are provided at the bottom of the inner wall of the outer liner 2. Each rolling support includes a rolling support seat 8, which is arranged circumferentially along the inner wall of the outer liner 2. Multiple balls 9 are embedded on the inner surface of the rolling support seat 8, and these balls 9 can roll within the rolling support seat 8. The upper surface of each ball 9 contacts the outer wall of the inner liner 1. The rolling supports are provided to support the inner liner 1, thereby ensuring the stability of the rotational movement of the inner liner 1.

[0040] The drive mechanism includes a motor 10, on the output shaft of the motor 10, a drive sprocket 11 is provided; a driven sprocket 12 is provided on the first rotating shaft 3 through a keyway, and a chain 13 is arranged around the drive sprocket 11 and the driven sprocket 12.

[0041] The motor 10 is mounted on the base plate 16 via a motor 10 mounting base and is powered by a DC or AC power supply. When the motor 10 drives the drive sprocket 11 to rotate, the drive sprocket 11 transmits the rotational torque to the inner liner 1 through the driven sprocket 12, the chain 13, and the first rotating shaft 3. The inner liner 1 rotates inside the outer liner 2, thereby causing the dry paint to flip.

[0042] The first bracket group 14 includes two first brackets 14, each first bracket 14 including a first support rod and a first circumferential rod; the first circumferential rod is arc-shaped and is circumferentially arranged around the outer surface of the outer liner 2; the first support rod is disposed below the first circumferential rod and is fixedly connected to the first circumferential rod. Preferably, the first circumferential rod is fixedly connected to the outer surface of the outer liner 2. Alternatively, the number of first brackets 14 can be increased according to the length of the outer liner 2.

[0043] The second bracket group 15 includes two second brackets 15. The upper end of the second bracket 15 is provided with a bearing hole, and a bearing is installed in the bearing hole. A first rotating shaft 3 or a second rotating shaft 4 passes through the bearing. In addition, the second bracket 15 can be structurally reinforced according to the dimensions of the inner liner 1 and the outer liner 2, for example, by adding diagonal ribs to one side of the second bracket 15.

[0044] The first support group 14 and the second support group 15 are both mounted on the base plate 16. A housing frame can also be installed on the outside of the base plate 16 as needed to enclose the entire forging furnace. Casters can be installed under the base plate 16 or the housing for easy movement.

[0045] To facilitate the operation of the device, a control module is provided on the substrate 16 or other locations. The control module is connected to the motor 10 and the heating wire 5, and provides control over the operation of the motor 10 and the heating wire 5.

[0046] Example 2 This embodiment provides a method for processing dry lacquer, which uses the aforementioned dry lacquer processing apparatus to process the dry lacquer. The method specifically includes: S1. Preheat the inner liner 1 to temperature T1; S2. Open the inner liner 1, put in the dry lacquer to be processed, and seal the inner liner 1. S3. Heat the inner liner 1 to temperature T2. During the heating process, start the drive mechanism to make the inner liner 1 rotate. S4. Detect the smoke concentration in the exhaust pipe 7. When the smoke concentration is lower than the smoke threshold, the heating wire 5 is de-energized. S5. The dried lacquer obtained after natural cooling.

[0047] The preheating temperature T1 is preferably 0.5 times the target temperature T2. Preheating is performed to improve processing efficiency without overheating, which could lead to uneven processing on the surface and inside of the lacquer. Temperature detection is achieved by installing multiple temperature sensors inside the inner liner 1. The signal lines from these sensors pass through the central hole of the second rotating shaft 4 and connect to the control module.

[0048] In step S3, the heating process can be a gradual temperature increase, for example, gradually raising the temperature to T2 according to a heating ratio. Smoke concentration is detected by installing a smoke detection sensor inside the exhaust pipe 7. The smoke threshold is set as needed.

[0049] Effect Experiment 1. Identification of physical characteristics The appearance characteristics of calcined lacquer, raw lacquer, and purchased calcined lacquer processed using this invention are identified, such as... Figure 3 As shown, Figure 3 (a) is raw, unprocessed lacquer. Figure 3 (b) is the calcined lacquer purchased (purchased from Nanchong Chunfan Chinese Medicine Co., Ltd., item number 20240512). Figure 3 (c) is the calcined varnish processed using the technical solution of the present invention.

[0050] It can be seen that the purchased calcined lacquer lacks gloss and has uneven color. Observation of its physical characteristics reveals that some of the lacquer was not fully calcined, feels heavy, and is not brittle and easy to break (not meeting the physical characteristic standards). The calcined lacquer processed using the technical solution of this invention has obvious gloss characteristics, uniform color, feels light, and is brittle and easy to break.

[0051] 2. Physicochemical identification According to the identification method under the "Dry Lacquer" section of the 2025 edition of the Chinese Pharmacopoeia, the following physicochemical identification methods were used to identify unprocessed raw lacquer, purchased calcined lacquer (purchased from Nanchong Chunfan Traditional Chinese Medicine Co., Ltd., item number 20240512), and calcined lacquer processed using the technical solution of this invention: Take 1g of dried lacquer powder, add 10ml of ethanol, heat in a hot water bath for 5 minutes, cool, and filter. Take 1ml of the filtrate, add 1-2 drops of ferric chloride test solution, and observe the color of the liquid. Figure 4 As shown, the raw lacquer is light green, the purchased calcined lacquer is colorless, and the calcined lacquer (self-made calcined lacquer) processed using the technical solution of this invention is dark green, indicating that this invention effectively preserves the phenolic components therein.

[0052] 3. Ash content detection experiment According to the identification method under the "Dry Lacquer" section of the 2025 edition of the Chinese Pharmacopoeia, the total ash content and acid-insoluble ash content in the dried lacquer were determined (based on General Chapter 2302 of Part IV of the 2025 edition of the Chinese Pharmacopoeia). The total ash content of the raw dried lacquer was 29.12%, and the acid-insoluble ash content was 25.77%. The total ash content of the purchased calcined dried lacquer (purchased from Nanchong Chunfan Chinese Medicinal Materials Co., Ltd., item number 20240512) was 19.87%, and the acid-insoluble ash content was 23.18%. The total ash content of the calcined dried lacquer processed by the technical solution of this invention was 5.43%, 5.27%, 5.31%, and 5.47%, and the acid-insoluble ash content was 1.8%, 1.79%, 1.58%, and 1.76%, respectively.

[0053] Experimental results show that commercially available calcined lacquer does not meet pharmacopoeia standards and local processing regulations, as indicated by morphological characteristics, physicochemical analysis, and ash content testing. The calcined lacquer processed using the technical solution of this invention not only meets pharmacopoeia standards and local processing regulations, but also exhibits ash content results significantly superior to those of the pharmacopoeia standards.

[0054] The above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A dry lacquer processing apparatus, comprising a calcining furnace, characterized in that, The forging furnace includes an inner liner and an outer liner, with the inner liner disposed inside the outer liner. The outer liner is supported by a first support assembly. A first rotating shaft is disposed at one end of the inner liner, and a second rotating shaft is disposed at the other end. Both the first and second rotating shafts extend through the outer liner. The first and second rotating shafts are supported by a second support assembly, and both are rotatably connected to the second support assembly. The first rotating shaft is connected to a drive mechanism, which drives the first rotating shaft to rotate. The outer liner is equipped with a heating wire spirally wound inside it; the inner liner is equipped with multiple sets of partitions arranged axially, each set of partitions being arranged in an array around the circumference of the inner liner, and the partitions being at an angle to the radial direction of the inner liner. .

2. The dry lacquer preparation apparatus according to claim 1, characterized in that, angle The value range is 10°-22°.

3. The dry lacquer preparation apparatus according to claim 2, characterized in that, Each set of partitions has three partitions arranged in a circumferential array, with adjacent partitions spaced 120° apart.

4. The dry lacquer preparation apparatus according to claim 3, characterized in that, The inner liner is provided with two adjacent sets of partitions, and the partitions in one set and the adjacent partitions in the other set are 60° apart in the circumferential direction.

5. The dry lacquer preparation apparatus according to claim 1, characterized in that, A central hole is provided at the axis of the second rotating shaft, and a smoke exhaust pipe is inserted through the central hole. The smoke exhaust pipe is rotatably and sealingly connected to the inner wall of the central hole.

6. The dry lacquer preparation apparatus according to claim 5, characterized in that, The exhaust pipe extends into the interior of the inner liner, and its length inside the inner liner is at least half the total length of the inner liner. The outer wall of the exhaust pipe is provided with multiple smoke inlets.

7. The dry lacquer preparation apparatus according to claim 1, characterized in that, There is a gap between the inner wall of the outer liner and the outer wall of the inner liner. A plurality of rolling supports are provided at the bottom of the inner wall of the outer liner. Each rolling support includes a rolling support seat, which is arranged circumferentially along the inner wall of the outer liner. A plurality of balls are embedded on the inner surface of the rolling support seat, and the balls can roll within the rolling support seat. The upper surface of the balls contacts the outer wall of the inner liner.

8. The dry lacquer preparation apparatus according to claim 1, characterized in that, The drive mechanism includes a motor, with a drive sprocket mounted on the output shaft of the motor; a driven sprocket is mounted on the first rotating shaft, and a chain is arranged around the drive sprocket and the driven sprocket.

9. The dry lacquer preparation apparatus according to claim 1, characterized in that, The first support assembly includes two first supports, each of which includes a first support rod and a first circumferential rod. The first circumferential rod is arc-shaped and is arranged circumferentially around the outer surface of the outer liner. The first support rod is located below the first circumferential rod and is fixedly connected to the first circumferential rod. The second support group includes two second supports. The upper end of the second support is provided with a bearing hole, a bearing is provided in the bearing hole, and a first rotating shaft or a second rotating shaft passes through the bearing. Both the first support group and the second support group are mounted on the substrate.

10. A method for processing dry lacquer, comprising processing dry lacquer using the dry lacquer processing apparatus according to any one of claims 5-9, characterized in that, The specific methods for preparing dry lacquer include: S1. Preheat the inner liner to temperature T1; S2. Open the inner liner, put in the dried lacquer to be processed, and seal the inner liner. S3. Heat the inner liner to temperature T2. During the heating process, start the drive mechanism to make the inner liner rotate. S4. Detect the smoke concentration in the exhaust pipe. When the smoke concentration is lower than the smoke threshold, the heating wire is de-energized. S5. The dried lacquer obtained after natural cooling.

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