Vacuum-assisted heating redwood product rapid equilibrium moisture content processing box

Abstract

The application discloses a kind of vacuum auxiliary heating's redwood product fast balancing moisture content processing box, it is related to redwood material drying processing field, including sealed box, vacuum mechanism, heating mechanism, temperature and humidity monitoring module, circulating air mechanism and control system, sealed box is the horizontal cylindrical structure made of heat-insulating pressure-resistant material, its feed side is equipped with the sealable sealing door, its top is equipped with pressure relief valve, observation window, its inside is equipped with the load-bearing frame for stacking redwood board or component;Vacuum mechanism includes the vacuum pump being communicated with the inside of sealed box by vacuum pipeline and the pressure sensor being used for monitoring vacuum degree and being arranged in the inside of sealed box;The kind of vacuum auxiliary heating's redwood product fast balancing moisture content processing box, by integration vacuum, composite heating and automatic feeding, realizes the efficient, uniform processing of redwood thick plate and special-shaped part moisture content and the automation of production process.

Description

Technical Field

[0001] This invention relates to the drying technology of rosewood materials, specifically to a vacuum-assisted heating treatment box for rapidly balancing the moisture content of rosewood products. Background Technology

[0002] Rosewood is highly favored by the high-end furniture and handicraft industry for its hardness, beautiful grain, and warm color. However, the production of rosewood products faces a long-standing technical challenge: achieving a rapid and uniform moisture content balance. Rosewood is mostly a precious and rare wood with extremely high material costs. If cracking, warping, or discoloration occurs during the drying process, it will result in significant economic losses.

[0003] Traditional methods for drying rosewood mainly include natural air drying and conventional hot air drying. Natural air drying takes months to years, consuming significant space and capital, making it difficult to meet the requirements of modern production cycles. While conventional hot air drying can shorten processing time, it involves significant temperature and humidity gradients, which can easily cause the surface of the wood to shrink too quickly, resulting in surface cracks, internal cracks, or honeycomb cracks. This problem is particularly pronounced for high-density, low-permeability woods like rosewood.

[0004] To address the aforementioned problems, the following technical solutions have been disclosed in the prior art:

[0005] For example, Liu Honghai et al., in their article "High-Frequency Vacuum Drying of Three Types of Rosewood Thin Boards, Including Dalbergia cochinchinensis" (Journal of Forestry Engineering, 2017), studied the drying effect of high-frequency vacuum drying technology on rosewood thin boards. Experimental results showed that this method can effectively improve drying speed and quality, and the average moisture content of the treated boards meets the process requirements with minimal color change. This study confirms that high-frequency vacuum drying is one of the excellent methods for drying rosewood thin boards. However, the above research and existing technical solutions mainly target thinner rosewood boards (usually not exceeding 30mm). For thicker rosewood boards exceeding 50mm in thickness, or complex-shaped carved components, the simple high-frequency vacuum drying technology faces the following problems: First, the penetration depth of electromagnetic energy is limited, which may lead to insufficient heating of the core and uneven drying inside and out; second, in a vacuum environment, a single heating method is difficult to achieve uniform and efficient heat transfer, the driving force for moisture migration in the core of thick boards is still insufficient, and the control of drying cycle and uniformity remains a technical bottleneck.

[0006] For example, CN118009663A discloses a method for stable drying of rosewood furniture. This method involves setting up a sleeve and a drive motor inside a drying kiln, moving the rosewood to the top of the sleeve where it is squeezed and held by a rotating block and clamping rod. Simultaneously, steam from an auxiliary steam cylinder contacts the rosewood surface through through-holes, drying the rosewood using steam drying. This method improves the stability of the drying process through mechanical clamping and steam assistance. However, this method still primarily relies on atmospheric pressure hot air / steam drying, resulting in a long processing cycle; furthermore, the squeezing and clamping method may cause indentations or damage to the rosewood surface, posing a high risk for high-value rosewood products.

[0007] For example, CN111347508A discloses a method for improving the stability of rosewood. This method includes steps such as drying, high-pressure-vacuum circulation, vacuum-high-pressure wax boiling, wax removal, and dewaxing. This method uses vacuum drying combined with high-pressure-vacuum circulation technology to make rosewood easier to impregnate, and then uses vacuum-high-pressure wax boiling to force liquid paraffin into the ducts, cell walls, and cell cavities of the rosewood, thereby improving the dimensional stability of the rosewood. Although this method improves the efficiency of wax boiling and shortens the boiling time, its process chain is relatively long, involving multiple pressure switching and media replacement, resulting in high equipment investment and operating costs. Furthermore, wax boiling alters the natural texture of rosewood, making it less than ideal for high-end furniture that emphasizes the natural feel of wood.

[0008] For example, CN105666618B discloses a method for drying rosewood, which includes the following steps: sawing the wood into finished pieces and drying them in a steam drying oven; boiling the wood in water for 110-130 minutes to remove oil; then drying and dehydrating it; soaking the wood in vegetable oil and alum in an oil tank for 6-8 days at a temperature of 72-78℃; and finally, placing the wood in a ventilated area to dry the oil. This method improves the dimensional stability of rosewood by boiling water degreasing and soaking in vegetable oil, making it less prone to swelling and deformation due to water absorption. However, this method has a processing cycle of several days to more than a week and involves multiple wet processes such as boiling water and soaking in oil, resulting in high energy consumption and a heavy burden of wastewater treatment, which falls short of the requirements of green manufacturing and rapid response in modern production.

[0009] For example, CN105509448A discloses a rosewood drying device, including a base and a drying chamber located above the base. The drying chamber has a horizontally moving conveyor belt, and heating mechanisms are located at the bottom and top of the chamber. First, second, and third partitions of decreasing thickness are installed between the heating mechanisms and the conveyor belt, forming a preheating zone, a heating zone, and a drying zone. This allows for gradual heating of the rosewood, preventing sudden heating that could lead to color fading or deformation. This device achieves gradual heating through its zoned design, which is significant for ensuring the quality of rosewood drying. However, this device is a continuous hot air drying system, making it difficult to achieve low-pressure drying under vacuum conditions. The processing speed is still limited by the physical constraint of the high boiling point of water under normal pressure; furthermore, the conveyor belt structure cannot simultaneously meet vacuum sealing requirements.

[0010] For example, CN105313203A discloses a method for rapid drying of rosewood, comprising two main steps: ultrasonic treatment and wax boiling. The method involves placing the rosewood in a sealed container and activating an ultrasonic generator for treatment; then, after melting paraffin wax, the wood is immersed in the molten paraffin wax and heated to 100–120°C at a rate of 1.5–2.5°C / h, maintaining the temperature for 24–72 hours to displace the moisture from the wood. This method is simple to operate, shortens the drying cycle compared to traditional methods, and overcomes the technical problems of cracking and deformation during rosewood drying. However, the processing time is still long, ranging from 24 to 72 hours, and it involves high-temperature wax boiling, which not only consumes a lot of energy but also allows the paraffin wax to penetrate the wood, altering its natural breathability and finishing properties, thus limiting its applicability.

[0011] In summary, although existing rosewood drying technologies have made progress in different directions, they still suffer from the following common technical shortcomings:

[0012] First, the processing effect on thick materials and irregularly shaped components is poor. Existing vacuum drying equipment mostly uses single radiant or conductive heating methods, transferring heat from the surface inwards. For mahogany boards thicker than 50mm or irregularly shaped components with complex carvings, the surface temperature rises and moisture evaporates rapidly, forming a dense shrinkage layer. This further hinders the outward migration of moisture from the core, leading to a "dry outside, wet inside" phenomenon. Even with extended processing time, the core moisture content is still difficult to reduce to the target value, and excessively long processing times will exacerbate the deterioration of the wood's color.

[0013] Secondly, wood leaching causes secondary pollution. Rosewood contains abundant volatile components such as oils and resins. During vacuum heat treatment, these components leach out along with moisture, some of which condense and adhere to the wood surface, forming oil stains or a gummy substance. This not only affects the appearance of the wood but also clogs the pores on the wood surface, hindering subsequent moisture migration and finishing processes. Existing equipment lacks effective means for collecting and separating these leachings.

[0014] Therefore, developing a moisture content treatment device for mahogany products that can uniformly process thick materials and irregularly shaped components, automatically collect and recycle wood exudates, and has automated loading and unloading functions is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0015] The purpose of this invention is to provide a vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products, in order to solve the problem of uneven internal and external moisture content and easy damage when drying thick mahogany boards and irregularly shaped parts in the prior art.

[0016] To achieve the above objectives, the present invention provides the following technical solution: a vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products, comprising:

[0017] The sealed box is a horizontal cylindrical structure made of heat-insulating and pressure-resistant material. It has an openable and closable sealed door on the feed side, a pressure relief valve and an observation window on the top, and a support frame for stacking mahogany boards or components on the inside.

[0018] The vacuum mechanism includes a vacuum pump connected to the inside of the sealed enclosure via a vacuum pipeline and a pressure sensor installed inside the sealed enclosure for monitoring the vacuum level.

[0019] The heating mechanism includes low-temperature radiant heating plates distributed on the inner wall of the sealed chamber;

[0020] The temperature and humidity monitoring module includes multiple temperature and humidity sensors installed in the sealed cavity of the box, as well as a moisture content sensor that can be inserted into the mahogany to measure the moisture content of the core and surface layers.

[0021] The circulating air mechanism includes a low-disturbance circulating fan installed inside one side of the sealed housing, and a guide plate located at the air outlet to guide the airflow to be evenly distributed.

[0022] The control system is electrically connected to the vacuum mechanism, heating mechanism, temperature and humidity monitoring module, and circulating air mechanism. The control system is used to control the opening and closing of the vacuum mechanism, heating mechanism, and circulating air mechanism and to control their linkage according to the preset process curve or real-time monitoring data.

[0023] Furthermore, the heating mechanism also includes an auxiliary heating module integrated inside the chamber, which can be a microwave heating module or a high-frequency electric field generating module. The microwave heating module includes multiple magnetrons evenly distributed along the axial direction of the chamber and a microwave feed inlet, with an operating frequency of 915MHz or 2450MHz. The high-frequency electric field generating module includes electrode plates positioned opposite each other on the upper and lower sides of the chamber, forming a high-frequency alternating electric field between the two electrode plates. The auxiliary heating module works in conjunction with a low-temperature radiant heating plate: the low-temperature radiant heating plate is mainly responsible for the overall heating of the wood surface and the chamber environment, maintaining the temperature inside the chamber within the range of 40-65℃; the electromagnetic waves generated by the auxiliary heating module can penetrate the wood surface to reach the core, selectively heating water molecules, causing the water molecules to vibrate violently, thereby forming a vapor pressure gradient from the inside to the outside of the wood, driving the moisture in the core to migrate rapidly to the surface. This composite heating mode is particularly suitable for thick plates with a thickness greater than 50mm or complex-shaped carved components, effectively solving the technical problem of difficult removal of moisture from the core under conventional vacuum heating methods. The control system automatically adjusts the output power of the auxiliary heating module based on the difference in moisture content between the core and the surface, achieving precise control and energy-saving operation.

[0024] Furthermore, two parallel tracks are arranged along the axial direction of the inner wall of the sealed box. An electrically operated sliding component, cooperating with these tracks, is located on the side of the support frame. The support frame moves axially along the tracks, extending its front end out of the sealed box and approaching the loading and stacking position. When loading is required, the control system controls the electrically operated sliding component to push the support frame forward, exposing each layer of perforated bottom plates sequentially to the loading and stacking area outside the box. Each layer stops at a preset stacking position. After a layer is stacked, the electrically operated sliding component continues to move forward one layer height, allowing the next layer to enter the stacking position. This cycle continues until all layers are stacked. Finally, the electrically operated sliding component pulls the support frame, along with the stacked plates, back into the box. This segmented removal design allows the robotic arm to complete the stacking of all layers in a fixed position.

[0025] Furthermore, the support frame has a multi-layered hollow structure, with a flow channel at its bottom for collecting liquid. The outlet of the flow channel is connected to a condensation recovery mechanism located outside the sealed enclosure via a drain pipe. The condensation recovery mechanism includes a condenser and an oil-water separator arranged sequentially along the fluid direction of the drain pipe. The condenser is used to condense the water vapor and oil vapor released from the wood into a liquid mixture, while the oil-water separator uses density differences to separate and recover the rosewood essential oil from the condensate.

[0026] Furthermore, the aforementioned moisture content treatment tank also includes a feeding mechanism, which is located on the inlet side of the sealed tank. The feeding mechanism includes:

[0027] The platform is a rectangular frame structure, with its end facing the feed side of the sealed box;

[0028] A board rack, located below the platform, is used to stack mahogany boards to be processed;

[0029] The guide roller frame is located at the end of the platform, and its roller surface is lower than the upper surface of the support frame;

[0030] The multi-degree-of-freedom palletizing robot arm is installed inside the feeding platform. The multi-degree-of-freedom palletizing robot arm is configured to: when the carrier frame is in the palletizing position, grab a single sheet of board from the sheet rack and transfer and stack it onto the carrier frame.

[0031] Furthermore, the multi-degree-of-freedom palletizing robot arm includes a horizontal movement module and an end effector module. The horizontal movement module includes a first linear motion unit arranged along the X-axis direction and a second linear motion unit installed on the movable end of the first linear motion unit and arranged along the Y-axis direction.

[0032] Furthermore, the end effector module is installed on both sides of the movable end of the second linear motion unit. The end effector module includes a lifting drive unit and a clamping unit installed at its lower end. A suction cup is provided in the middle of the end of the clamping unit, and servo grippers are provided on both sides of the end of the clamping unit. The working process of the loading mechanism is as follows: First, the control system controls the electric sliding component to push the carrier frame forward, so that its first layer bottom plate moves to the stacking station; then, the multi-degree-of-freedom stacking robot arm grabs the mahogany board from the board rack, moves it above the guide roller frame to the first layer bottom plate of the carrier frame, and places it accurately; repeat the above grabbing and placing actions until the first layer bottom plate is filled; then, the electric sliding component continues to move forward by one layer height, so that the second layer bottom plate enters the stacking station, and the robot arm continues to stack the second layer of boards; after completing all the stacking operations layer by layer, the electric sliding component pulls the carrier frame back into the sealed box, and the sealed door is closed to start processing. The guide roller frame provides auxiliary support when the support frame is moved out, preventing the overhanging part of the support frame from sagging due to its own weight. At the same time, it provides rolling support during the transfer of the sheet material, reducing frictional resistance.

[0033] Furthermore, the aforementioned moisture content treatment box also includes a drive assembly, which comprises a base plate, a bracket, a gear drive device, and a side rack. The base plate has an L-shaped cross-section and a guide groove. The upper end of the bracket is connected to the sealed housing, and the bottom of the bracket is slidably connected to the guide groove. A side rack is provided on the outer side of the bottom of the bracket, and a gear drive device is mounted on the base plate that meshes with the side rack and drives the support frame to move along the guide groove. The drive assembly is used to realize the overall movement of the entire sealed housing relative to the feeding mechanism, so as to facilitate equipment maintenance and position adjustment between the housing and the feeding mechanism. When the gear drive device is working, the gear rotates and pushes the side rack, thereby driving the bracket and the sealed housing fixed thereon to move as a whole along the guide groove. The main functions of this drive assembly include:

[0034] Firstly, during equipment installation or maintenance, the sealed housing can be moved as a whole to provide operating space for the feeding mechanism;

[0035] Secondly, for boards of different lengths, the palletizing path can be optimized by adjusting the relative position of the sealed box and the feeding mechanism.

[0036] Compared with existing technologies, this invention provides a vacuum-assisted heating rapid moisture content balancing treatment box for rosewood products. By creating a vacuum environment, combining low-temperature radiant heating, circulating air, and intelligent control, it achieves a gentle and uniform basic drying of rosewood products, effectively avoiding damage such as cracking and deformation caused by traditional high-temperature drying methods, and meeting the basic requirements of high-quality preliminary treatment for rosewood products. Specific technical effects include the following:

[0037] 1. This invention introduces a microwave or high-frequency electric field-assisted heating module, which, in conjunction with vacuum and low-temperature radiation heating, constructs a powerful moisture migration mechanism from the inside out. This composite heating method can penetrate the wood, directly and selectively heating the core moisture and generating a strong steam driving force. This completely solves the technical bottleneck of traditional methods when processing thick mahogany boards or complex irregularly shaped pieces with a thickness greater than 50mm, where the core drying is delayed and the internal and external moisture content is uneven. The drying speed is significantly improved, and the overall moisture content distribution is uniform.

[0038] 2. By adding a condensation recovery mechanism, the system can effectively collect the moisture and natural oils released from the rosewood during the processing, and achieve refining and recovery through condensation and oil-water separation. This not only prevents the condensation of oils within the equipment from causing secondary pollution to the wood, ensuring a clean processing environment and wood quality, but also turns the high-value-added byproduct of rosewood essential oil into a valuable resource, increasing additional economic benefits.

[0039] 3. The equipment of this invention also integrates an automated feeding mechanism and a carrier frame drive assembly. Through the cooperation of the segmented movable carrier frame and the multi-degree-of-freedom palletizing robotic arm, the automatic gripping, precise stacking, and automatic entry and exit of mahogany boards into sealed boxes are realized. The heavy manual palletizing operation is transformed into an efficient and precise automated process, which significantly reduces labor intensity, improves production cycle and equipment utilization, and enables the entire moisture content treatment process to achieve highly automated and continuous operation. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0041] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0042] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0044] Figure 4 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention;

[0045] Figure 5 This is a schematic diagram of the drive assembly in Embodiment 4 of the present invention;

[0046] Figure 6 This is a schematic diagram of the feeding mechanism in Embodiment 4 of the present invention.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Sealed housing; 2. Vacuum mechanism; 3. Sealed door; 4. Support frame; 41. Flow guide channel; 5. Low-temperature radiant heating plate; 6. Auxiliary heating module; 7. Track; 8. Feeding mechanism; 81. Platform; 82. Plate rack; 83. Guide roller frame; 84. Multi-degree-of-freedom palletizing robot arm; 841. Horizontal movement module; 842. End effector module; 9. Drive assembly; 91. Base plate; 92. Bracket; 93. Gear drive device; 94. Side rack. Detailed Implementation

[0049] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] As attached Figure 1 As shown:

[0051] Example 1:

[0052] This invention provides a vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products, comprising a sealed box body 1, a vacuum mechanism 2, a heating mechanism, a temperature and humidity monitoring module, a circulating air mechanism, and a control system.

[0053] 1. In one embodiment of the present invention, the sealed box 1 is a horizontal cylindrical structure made of heat-insulating and pressure-resistant material, with an openable and closable sealed door 3 on its feed side, a pressure relief valve and an observation window on its top, and a support frame 4 for stacking mahogany boards or components on its inner side.

[0054] 2. In one embodiment of the present invention, the vacuum mechanism 2 includes a vacuum pump that is connected to the interior of the sealed housing 1 via a vacuum pipeline and a pressure sensor disposed inside the sealed housing 1 for monitoring the vacuum level.

[0055] 3. In one embodiment of the present invention, the heating mechanism includes low-temperature radiant heating plates 5 distributed on the inner wall of the sealed box 1.

[0056] 4. In one embodiment of the present invention, the temperature and humidity monitoring module (not shown in the figure) includes multiple temperature and humidity sensors disposed in the inner cavity of the sealed box 1, and a moisture content sensor that can be inserted into the interior of the mahogany to measure the moisture content of the core layer and the surface layer.

[0057] 5. In one embodiment of the present invention, the circulating air mechanism (not shown in the figure) includes a low-disturbance circulating fan installed inside one side of the sealed housing 1, and a guide plate provided at the air outlet to guide the airflow to be evenly distributed.

[0058] 6. In one embodiment of the present invention, the control system is electrically connected to the vacuum mechanism 2, the heating mechanism, the temperature and humidity monitoring module and the circulating air mechanism. The control system is used to control the opening and closing of the vacuum mechanism 2, the heating mechanism and the circulating air mechanism and to control their linkage according to the preset process curve or real-time monitoring data.

[0059] Working Principle: In Example 1, a controllable, sealed environment is created using a sealed chamber 1. During operation, the vacuum mechanism 2 first evacuates the chamber to a set vacuum level, significantly lowering the boiling point of water. Simultaneously, the low-temperature radiant heating plate 5 activates, providing gentle and uniform heating to the chamber environment and the surface of the wood. Under the combined effect of low pressure and heating, the surface and shallow moisture of the wood evaporates rapidly, and the circulating air mechanism promotes the uniform flow and exchange of humid and hot air within the chamber. The temperature and humidity monitoring module monitors key parameters in real time, and the control system coordinates the operation of each mechanism accordingly, achieving basic vacuum hot air balance treatment of the mahogany products and avoiding the damage caused by traditional high-temperature drying.

[0060] As attached Figure 2 As shown:

[0061] Example 2:

[0062] This embodiment is basically the same as the previous embodiment, except that the heating mechanism also includes an auxiliary heating module 6 integrated inside the chamber. The auxiliary heating module 6 is either a microwave heating module or a high-frequency electric field generating module. The microwave heating module includes multiple magnetrons and microwave feed inlets evenly distributed along the axial direction of the chamber, with a working frequency of 915MHz or 2450MHz. The high-frequency electric field generating module includes electrode plates arranged opposite each other on the upper and lower sides of the chamber, forming a high-frequency alternating electric field between the two electrode plates. The auxiliary heating module 6 works in conjunction with the low-temperature radiant heating plate 5: the low-temperature radiant heating plate 5 is mainly responsible for the overall heating of the wood surface and the chamber environment, maintaining the temperature inside the chamber within the range of 40-65℃; the electromagnetic waves generated by the auxiliary heating module 6 can penetrate the wood surface and reach the core, selectively heating water molecules, causing the water molecules to vibrate violently, thereby forming a vapor pressure gradient from the inside to the outside of the wood, driving the moisture in the core to migrate rapidly to the surface. This composite heating mode is particularly suitable for thick plates with a thickness greater than 50mm or complex-shaped carved components, and can effectively solve the technical problem of difficult removal of moisture from the core under conventional vacuum heating methods. The control system automatically adjusts the output power of the auxiliary heating module 6 based on the difference in moisture content between the core and the surface, achieving precise control and energy-saving operation.

[0063] Working Principle: Conventional vacuum heating methods (such as in Example 1) mainly rely on thermal radiation to transfer heat from the surface to the core. For thick boards exceeding 50mm in thickness or complex-shaped carved components, heat cannot penetrate to the core, resulting in a dry exterior and moist interior. Therefore, the penetration capability of a single radiation heating mode is insufficient when dealing with the deep drying requirements of thick materials and irregularly shaped components. Example 2 introduces a microwave or high-frequency electromagnetic wave auxiliary heating module 6 based on Example 1. Utilizing the selective heating characteristics of electromagnetic waves on water molecules, it achieves a volumetric heating effect from the inside out, complementing the surface heating from the outside in by the low-temperature radiation heating plate 5. This creates a composite heating mode, significantly increasing the speed at which moisture migrates from the core to the surface, thereby greatly shortening the processing time for thick materials and irregularly shaped components while ensuring the quality of the wood.

[0064] As attached Figure 3 As shown:

[0065] Example 3:

[0066] This embodiment is basically the same as the previous embodiment, except that the support frame 4 has a multi-layer hollow structure, and its bottom is provided with a guide channel 41 for collecting liquid. The outlet of the guide channel 41 is connected to a condensation recovery mechanism located outside the sealed box 1 through a drain pipe. The condensation recovery mechanism includes a condenser and an oil-water separator arranged sequentially along the fluid direction of the drain pipe. The condenser is used to condense the water vapor and oil vapor released from the wood into a liquid mixture, and the oil-water separator uses the density difference to separate and recover the rosewood essential oil from the condensate.

[0067] Working Principle: During the vacuum heating process, rosewood releases a large amount of water vapor containing volatile components such as oils and resins. This mixed vapor condenses on the inner wall of the chamber or the surface of the wood, forming oily droplets that adhere to the wood surface, causing secondary pollution and forming oil stains or glue-like substances, affecting the appearance of the wood and the adhesion of subsequent coating processes. Therefore, in Embodiment 3, a guide channel 41 and a condensation recovery mechanism are installed at the bottom of the support frame 4 to collect, condense, and transport the released mixed vapor to an external oil-water separator. The density difference between rosewood essential oil and water is used to achieve automatic stratification and separation, recovering the high-value-added rosewood essential oil and the treated condensate separately. This design not only solves the technical problem of secondary oil pollution on the wood surface but also realizes the resource recycling of by-products, while maintaining the cleanliness of the chamber interior and extending the equipment maintenance cycle.

[0068] As attached Figure 4 To be continued Figure 6 As shown:

[0069] Example 4:

[0070] This embodiment is basically the same as the previous embodiment, except that two parallel tracks 7 are arranged along the axial direction on the inner wall of the sealed box 1. An electric sliding component that cooperates with the tracks 7 is provided on the side of the support frame 4. The support frame 4 moves axially along the tracks 7, extending its front end out of the sealed box 1 and approaching the loading and stacking position. When loading is required, the control system controls the electric sliding component to push the support frame 4 forward, exposing each layer of perforated bottom plates 91 sequentially to the loading and stacking area outside the box. Each layer of bottom plates 91 stops at a preset stacking position. After the layer is stacked, the electric sliding component continues to move forward one layer height, allowing the next layer of bottom plates 91 to enter the stacking position. This cycle continues until all layers are stacked. Finally, the electric sliding component pulls the support frame 4, along with the stacked plates, back into the box. This segmented removal design allows the robotic arm to complete the stacking of all layers in a fixed position.

[0071] 1. In one embodiment of the present invention, the moisture content treatment tank further includes a feeding mechanism 8, which is disposed on the feeding side of the sealed tank 1, and the feeding mechanism 8 includes:

[0072] The frame 81 is a rectangular frame structure, with its end facing the feed side of the sealed box 1;

[0073] A board rack 82 is located below the platform 81 and is used to stack mahogany boards to be processed;

[0074] The guide roller frame 83 is located at the end of the platform 81, and its roller surface is lower than the upper surface of the support frame 4;

[0075] A multi-degree-of-freedom palletizing robot arm 84 is installed inside the feeding platform 81. The multi-degree-of-freedom palletizing robot arm 84 is configured to: when the support frame 4 is in the palletizing position, pick up a single sheet of board from the sheet rack 82 and transfer and stack it onto the support frame 4.

[0076] 2. In one embodiment of the present invention, the multi-degree-of-freedom palletizing robot arm 84 includes a horizontal movement module 841 and an end effector module 842. The horizontal movement module 841 includes a first linear motion unit arranged along the X-axis direction and a second linear motion unit installed on the movable end of the first linear motion unit and arranged along the Y-axis direction.

[0077] 3. In one embodiment of the present invention, the end effector module 842 is installed on both sides of the movable end of the second linear motion unit. The end effector module 842 includes a lifting drive unit and a clamping unit installed at its lower end. A suction cup is provided in the middle of the end of the clamping unit, and servo grippers are provided on both sides of the end of the clamping unit. The working process of the loading mechanism 8 is as follows: First, the control system controls the electric sliding component to push the carrier frame 4 forward, so that its first layer bottom plate 91 moves to the stacking station; then, the multi-degree-of-freedom stacking robot arm 84 grabs the mahogany board from the board rack 82, and moves it above the guide roller frame 83 to the first layer bottom plate 91 of the carrier frame 4 for precise placement; repeat the above grabbing and placement actions until the first layer bottom plate 91 is filled; then, the electric sliding component continues to move forward by one layer height, so that the second layer bottom plate 91 enters the stacking station, and the robot arm continues to stack the second layer of boards; after completing all the stacking operations layer by layer, the electric sliding component pulls the carrier frame 4 back into the sealed box 1, and the sealed door 3 is closed to start processing. The guide roller frame 83 plays an auxiliary supporting role when the support frame 4 is moved out, preventing the overhanging part of the support frame 4 from sagging due to its own weight. At the same time, it provides rolling support during the transfer of the plate and reduces frictional resistance.

[0078] 4. In one embodiment of the present invention, the moisture content treatment box further includes a drive assembly 9, which includes a base plate 91, a bracket 92, a gear drive device 93, and a side rack 94. The base plate 91 has an L-shaped cross-section and a guide groove. The upper end of the bracket 92 is connected to the sealed box 1, and the bottom of the bracket 92 is slidably connected to the guide groove. A side rack 94 is provided on the outer side of the bottom of the bracket 92. The base plate 91 is equipped with a gear drive device 93 that meshes with the side rack 94 and drives the support frame 4 to move along the guide groove. The drive assembly 9 is used to realize the overall movement of the entire sealed box 1 relative to the feeding mechanism 8, so as to facilitate equipment maintenance and position adjustment between the box and the feeding mechanism 8. When the gear drive device 93 is working, the gear rotates and pushes the side rack 94, thereby driving the bracket 92 and the sealed box 1 fixed thereon to move along the guide groove as a whole. The main functions of the drive assembly 9 include:

[0079] Firstly, during equipment installation or maintenance, the sealed housing 1 can be moved away as a whole to provide operating space for the feeding mechanism 8;

[0080] Secondly, for boards of different lengths, the palletizing path can be optimized by adjusting the relative position of the sealed box 1 and the feeding mechanism 8.

[0081] Working Principle: In Embodiment 4, the segmented automatic removal and repositioning of the support frame 4 is achieved through the cooperation of the electric sliding component and the track 7. The segmented removal design exposes each layer of the support frame 4's bottom plate 91 sequentially to a fixed stacking station, allowing the multi-degree-of-freedom stacking robot arm 84 to complete the layer-by-layer stacking of all plates in a fixed position. This avoids the complex design of requiring the robot arm to have a large-stroke Z-axis lifting function or to move with the support frame 4. Simultaneously, the guide roller frame 83 in the feeding mechanism 8 provides auxiliary support and rolling guidance when the support frame 4 is suspended, preventing deformation and reducing transfer friction. The multi-degree-of-freedom stacking robot arm 84 achieves stable gripping, transfer, and precise release of mahogany boards through the coordinated movement of the horizontal movement module 841 (X-axis, Y-axis) and the end effector module 842 (lifting, suction cup, servo gripper). Furthermore, the drive assembly 9 enables relative movement of the entire sealed housing 1, providing flexibility for equipment maintenance and optimization of stacking paths for different specifications of boards. Through the collaborative work of the aforementioned institutions, Example 4, based on the previous examples, constructs a fully automated operation system that integrates automatic feeding of sheet materials, layer-by-layer stacking, vacuum heating treatment, and unloading. This significantly reduces the intensity of manual operation and improves the consistency of batch processing and production efficiency.

[0082] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products, characterized in that, include: The sealed box (1) is a horizontal cylindrical structure made of heat-insulating and pressure-resistant material. It has an openable and closable sealed door (3) on the feed side, a pressure relief valve and an observation window on the top, and a support frame (4) for stacking mahogany boards or components on the inside. The vacuum mechanism (2) includes a vacuum pump connected to the interior of the sealed housing (1) via a vacuum pipeline and a pressure sensor installed inside the sealed housing (1) for monitoring the vacuum level. The heating mechanism includes low-temperature radiant heating plates (5) distributed on the inner wall of the sealed box (1); The temperature and humidity monitoring module includes multiple temperature and humidity sensors installed in the inner cavity of the sealed box (1), and a moisture content sensor that can be inserted into the mahogany to measure the moisture content of the core and surface layers. The circulating air mechanism includes a low-disturbance circulating fan installed on one side inside the sealed housing (1), and a guide plate located at the air outlet to guide the airflow to be evenly distributed. The control system is electrically connected to the vacuum mechanism (2), heating mechanism, temperature and humidity monitoring module and circulating air mechanism. The control system is used to control the opening and closing and linkage control of the vacuum mechanism (2), heating mechanism and circulating air mechanism according to the preset process curve or real-time monitoring data.

2. The vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products according to claim 1, characterized in that, The heating mechanism also includes an auxiliary heating module (6) integrated inside the housing, which is a microwave heating module or a high-frequency electric field generating module.

3. The vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products according to claim 1, characterized in that, The inner wall of the sealed box (1) is provided with two parallel tracks (7) along its axial direction. The side of the support frame (4) is provided with an electric sliding component that cooperates with the track (7). The support frame (4) moves along the track (7) axially and extends its front end out of the sealed box (1) and close to the loading and stacking position.

4. A vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products according to claim 3, characterized in that, The support frame (4) is a multi-layer hollow structure, and a guide channel (41) for collecting liquid is provided at its bottom. The outlet of the guide channel (41) is connected to the condensation recovery mechanism located outside the sealed box (1) through the drain pipe. The condensation recovery mechanism includes a condenser and an oil-water separator arranged sequentially along the fluid direction of the drain pipe.

5. A vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products according to claim 1, characterized in that, It also includes a feeding mechanism (8), which is located on the feeding side of the sealed box (1). The feeding mechanism (8) includes: The stand (81) is a rectangular frame structure with its end facing the feed side of the sealed box (1); A board rack (82) is located below the platform (81) and is used to stack mahogany boards to be processed; The guide roller frame (83) is located at the end of the platform (81), and its roller surface is lower than the upper surface of the support frame (4); A multi-degree-of-freedom palletizing robot arm (84) is installed inside the feeding platform (81). The multi-degree-of-freedom palletizing robot arm (84) is configured to: when the support frame (4) is in the palletizing position, grab a single sheet of board from the sheet rack (82) and transfer and stack it onto the support frame (4).

6. A vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products according to claim 5, characterized in that, The multi-degree-of-freedom palletizing robot arm (84) includes a horizontal movement module (841) and an end effector module (842). The horizontal movement module (841) includes a first linear motion unit arranged along the X-axis and a second linear motion unit installed at the movable end of the first linear motion unit and arranged along the Y-axis.

7. A vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products according to claim 6, characterized in that, The end effector module (842) is installed on both sides of the movable end of the second linear motion unit. The end effector module (842) includes a lifting drive unit and a clamping unit installed at its lower end. A suction cup is provided in the middle of the end of the clamping unit, and servo grippers are provided on both sides of the end of the clamping unit.

8. A vacuum-assisted heating rapid moisture content balancing treatment box for mahogany products according to claim 1, characterized in that, It also includes a drive assembly (9), which includes a base plate (91), a bracket (92), a gear drive device (93) and a side rack (94). The base plate (91) has an L-shaped cross section and a guide groove. The upper end of the bracket (92) is connected to the sealing box (1), and the bottom of the bracket (92) is slidably connected to the guide groove. A side rack (94) is provided on the outer side of the bottom of the bracket (92), and a gear drive device (93) is mounted on the base plate (91) to mesh with the side rack (94) and drive the support frame (4) to move along the guide groove.

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