Artificial stone plate partition pressure hot transfer printing equipment and hot transfer printing process

Abstract

The present application relates to the technical field of stone plate manufacturing, and particularly relates to a man-made stone plate partition pressure hot transfer printing equipment and a hot transfer printing process. The man-made stone plate partition pressure hot transfer printing equipment comprises a rack, a rotating driving mechanism with a graduated turntable, at least one loading station, a detection station, a hot transfer printing station and a discharging station are arranged on the turntable, and each station is provided with a workpiece carrying unit with a self-centering clamp. A hot transfer printing unit is arranged above the hot transfer printing station, which comprises a two-dimensional array composed of multiple independently controllable pressure units, and each pressure unit is provided with a heating part and an elastic compression pad at the bottom. The detection station is provided with a three-dimensional topography scanning unit, which realizes pre-detection of the workpiece topography and independent pressure control in different zones, so as to realize adaptive and accurate fitting of the three-dimensional complex surface, effectively avoids defects such as uneven transfer, bubbles and wrinkles, and significantly improves the transfer quality and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of stone slab manufacturing technology, specifically to a zoned pressure heat transfer printing device and heat transfer printing process for artificial stone slabs. Background Technology

[0002] Artificial stone slabs are widely used in home and commercial decoration due to their excellent physical properties and rich decorative properties. To imitate the realistic texture and three-dimensional patterns of natural stone, a heat transfer process is often used, in which a transfer film with a raised three-dimensional pattern is laminated onto the surface of the slab through heating and pressure.

[0003] Existing heat transfer equipment typically consists of a rigid heating head, a pressure device, and a control system. Its operation is mostly based on overall flat pressure, meaning a rigid flat head, sized to match the material, applies uniform pressure to the entire contact surface between the transfer film and the material while heating. However, when the artificial stone material to be processed has a pre-defined three-dimensional shape (such as relief or textured patterns) or exhibits slight warping, the rigid flat head cannot adaptively conform to such uneven surfaces. This results in uneven pressure between the transfer film and the substrate; excessive pressure in raised areas may damage the transfer film or the material, while insufficient pressure in recessed areas leads to poor adhesion, incomplete pattern transfer, or defects such as bubbles and white spots. Furthermore, frequent fixture changes or adjustments are required for materials of different sizes, impacting production efficiency.

[0004] Therefore, there is an urgent need to develop a heat transfer equipment and process that can adapt to the surface morphology of the sheet material, achieve precise local pressure control, and be quickly compatible with sheets of different sizes. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of uneven pressure caused by overall hot pressing, high requirements for the flatness of the board surface, and poor clamp adaptability in the prior art, and to provide a heat transfer equipment and process for artificial stone boards that can realize independent pressure control in different zones, adapt to the shape of the board, and have a fast self-centering clamping function.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a zoned pressure heat transfer printing device for artificial stone slabs, including a frame;

[0007] A rotary drive mechanism, mounted on the frame, provides intermittent rotary indexing motion at its output end;

[0008] The turntable is fixedly connected to the output end of the rotary drive mechanism, and at least four processing stations are evenly arranged around its circumference. The processing stations include at least a loading station, an inspection station, a heat transfer station, and a unloading station.

[0009] Multiple workpiece carrying units are fixed to each processing station of the turntable in a one-to-one correspondence. Each workpiece carrying unit includes a self-centering fixture for carrying and laterally positioning the workpiece.

[0010] At least one heat transfer unit is disposed above the heat transfer station; the heat transfer unit includes a lifting driver fixed to the frame, a pressure head mounting plate connected to the driving end of the lifting driver, and an independent partition pressure module installed below the pressure head mounting plate; the independent partition pressure module includes a two-dimensional array composed of multiple pressure units that can independently control the Z-axis stroke and output pressure; each pressure unit is provided with a heating part at its bottom end and an elastic pressing pad installed on the lower surface of the heating part.

[0011] Furthermore, the self-centering fixture includes a base fixed to the turntable;

[0012] At least three sets of radial linear guide mechanisms are evenly arranged circumferentially on the base;

[0013] The number of gripper assemblies is the same as that of the guide mechanism. Each gripper assembly includes a slider that slides with the guide mechanism, a connecting rod connected to the slider, and a clamping member disposed at the end of the connecting rod away from the center of the base.

[0014] A central synchronization mechanism is rotatably disposed at the center of the base, and the central synchronization mechanism has an arc-shaped guide through hole with the same number as the gripper assembly;

[0015] In this configuration, the end of each connecting rod near the central synchronization mechanism is slidably inserted into the corresponding arc-shaped guide through hole, and the outer wall of each connecting rod is slidably connected to the central synchronization mechanism at the arc-shaped guide through hole via a bearing. This allows the central synchronization mechanism to rotate around its axis, thereby pushing each connecting rod to move along the trajectory of its corresponding arc-shaped guide through hole via the bearing, and driving all the gripper assemblies to move radially synchronously, thus achieving automatic centering and clamping of the workpiece.

[0016] Furthermore, a central positioning shaft is provided at the center of the base; the central synchronization mechanism includes a rotating ring that is sleeved on the central positioning shaft by a bearing and can rotate around it, and the arc-shaped guide hole is opened on the rotating ring; each of the connecting rods slides through the portion of the arc-shaped guide hole, and its outer side wall contacts the inner wall of the rotating ring through a deep groove ball bearing.

[0017] Furthermore, the self-centering fixture also includes a drive assembly, which includes a first drive motor mounted on the bottom of the turntable, the output shaft of the first drive motor passing through the central positioning shaft and being drivenly connected to the rotating ring.

[0018] Furthermore, the linear guide mechanism is a slide rail that cooperates with the slider, and each end of the slide rail is provided with a limiting block.

[0019] Furthermore, the heating element is a metal heating plate with an embedded heating element and temperature sensor; the elastic pressing pad is a high-temperature resistant silicone pad, a fluororubber pad, or a ceramic fiber composite pad.

[0020] Furthermore, it also includes a three-dimensional topography scanning unit, which is fixed on the frame and set corresponding to the detection station, and is used to acquire three-dimensional topography data of the upper surface of the workpiece located at the station.

[0021] Furthermore, the independent zone pressure module also includes a local vacuum auxiliary device; the local vacuum auxiliary device includes a sealing frame fixed to the lower surface of the pressure head mounting plate and surrounding the pressure unit array, a flexible sealing skirt connected to the bottom of the sealing frame, and a vacuum generating device; the bottom inner side of the flexible sealing skirt is provided with a sealing flange for contacting the workpiece surface, so as to form a closed space during pressing, and the vacuum generating device is connected to the closed space through a pipeline.

[0022] Furthermore, the rotary drive mechanism includes a second drive motor and a cam divider fixedly connected to the output shaft of the second drive motor, wherein the output shaft of the cam divider is fixedly connected to the center of the turntable.

[0023] The partitioned pressure heat transfer process for artificial stone slabs, using the equipment described above, includes the following steps:

[0024] S1. Loading and fixing: At the loading station, the artificial stone slab covered with transfer film is placed on the workpiece bearing unit and centered and clamped by the self-centering fixture.

[0025] S2. Shape Inspection: The rotary drive mechanism drives the turntable to rotate, transporting the workpiece to the inspection station. The three-dimensional shape data of its surface is obtained by the three-dimensional shape scanning unit. Based on the data, the required target pressing stroke and applied pressure value are calculated for each independent pressing unit in the heat transfer unit.

[0026] S3. Conveying and Positioning: The turntable continues to rotate, conveying the scanned workpiece to the heat transfer station;

[0027] S4. Adaptive hot pressing in zones: The heat transfer unit descends, and each pressure unit operates independently according to its calculated target pressing stroke, so that the elastic pressing pad adaptively adheres to the workpiece surface; then, each pressure unit is controlled to apply its corresponding pressure value and start heating, and the transfer is completed at the set temperature and time.

[0028] S5. Reset and unloading: After the transfer is completed, heating is stopped and the pressure of each pressure unit is released, and the heat transfer unit rises; the turntable continues to rotate, transporting the workpiece to the unloading station, and the self-centering fixture releases the workpiece and takes out the finished product.

[0029] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0030] 1. High-quality transfer: By using the method of "scanning first and then applying pressure in sections", the pressing pressure can adapt to the micro-morphology of the board surface, ensuring that the uneven areas can receive appropriate pressure. This greatly reduces defects such as incomplete transfer, bubbles, and white spots caused by uneven pressure, and significantly improves the integrity, clarity and adhesion of the transfer pattern.

[0031] 2. High compatibility and efficiency: The self-centering fixture can quickly and automatically adapt to and clamp plates of different sizes and specifications, reducing downtime for changing fixtures and improving the flexibility and efficiency of the production line.

[0032] 3. Enhanced process controllability: The pressure, temperature, and stroke of each pressure unit can be independently controlled in a closed loop, allowing for fine-tuning of process parameters for different areas of the board or special patterns, thus achieving refined and digitalized production.

[0033] 4. Integration and Automation: The equipment integrates feeding, detection, hot pressing and unloading into a rotating platform. With automatic control, it realizes continuous and automated production, reducing labor costs and operational intensity.

[0034] 5. Vacuum assistance is introduced: This further eliminates air between the transfer film and the substrate, especially on complex surfaces, enhancing the bonding effect. It is particularly suitable for transfer scenarios with deep textures or high requirements. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the artificial stone slab partitioned pressure heat transfer equipment of the present invention.

[0036] Figure 2 This is a side view of the artificial stone slab partition pressure heat transfer device of the present invention.

[0037] Figure 3 This is a schematic diagram of the workpiece bearing unit of the present invention.

[0038] Figure 4 This is a schematic diagram of the structure of the thermal transfer unit of the present invention.

[0039] Figure 5 This is a cross-sectional view of the heat transfer unit of the present invention.

[0040] Figure 6 This is a flowchart of the partitioned pressure heat transfer process for artificial stone slabs according to the present invention.

[0041] Reference numerals: 1. Frame;

[0042] 2. Rotary drive mechanism;

[0043] 3. Turntable; 31. Loading station; 32. Inspection station; 33. Heat transfer station; 34. Unloading station;

[0044] 4. Workpiece bearing unit; 41. Base; 42. Linear slide rail; 43. Slider; 44. Connecting rod; 45. Clamping component; 46. Positioning shaft; 47. Rotating ring; 471. Guide through hole; 48. Bearing; 49. Deep groove ball bearing;

[0045] 5. Heat transfer unit; 51. Lifting cylinder; 52. Pressure head mounting plate; 53. Independent zoned pressure module; 531. Pressure unit; 532. Heating plate; 533. Elastic pressing pad; 54. Local vacuum auxiliary device; 541. Sealing frame; 542. Sealing skirt; 543. Sealing flange; 544. Vacuum generator;

[0046] 6. Three-dimensional topography scanning unit. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Reference Figures 1-5 As shown in the preferred embodiment of the present invention, the artificial stone slab partition pressure heat transfer equipment mainly includes a frame 1, a rotary drive mechanism 2, a turntable 3, four workpiece bearing units 4, a heat transfer unit 5, and a three-dimensional shape scanning unit 6.

[0049] The rotary drive mechanism 2 consists of a servo motor (second drive motor) and a cam divider, and is installed in the middle of the frame 1. The turntable 3 is fixed on the output shaft of the cam divider, and has four processing stations evenly arranged around its circumference: loading station 31, inspection station 32, heat transfer station 33, and unloading station 34. Each station is fixedly equipped with a workpiece carrying unit 4.

[0050] like Figure 1 and Figure 3As shown, the core of the workpiece bearing unit 4 is a self-centering fixture, which includes a base 41, which is fixed to the turntable 3 by bolts. Four sets of radial linear slide rails 42 are evenly installed circumferentially on the base 41 as a linear guide mechanism. Each set of slide rails 42 is equipped with a slidable slider 43. One end of a connecting rod 44 is fixedly connected to the slider 43, and the other end is equipped with a clamping element 45 (such as a hard alloy block with anti-slip texture). A central positioning shaft 46 is fixed at the center of the base 41. A rotating ring 47 is sleeved on the central positioning shaft 46 through a pair of angular contact ball bearings 48 and can rotate freely around it. The rotating ring 47 has four arc-shaped guide holes 471. The end of each connecting rod 44 near the center slides through a corresponding arc-shaped guide hole 471. Figure 5 As shown, at the through-hole, a deep groove ball bearing 49 is installed on the outer wall of the connecting rod 44. The outer ring of the deep groove ball bearing 49 contacts the inner wall of the arc-shaped guide hole 471 on the rotating ring 47. A first drive motor (not shown in the figure) is installed at the bottom of the turntable 3. Its output shaft passes through the hollow central positioning shaft 46 and is connected to the rotating ring 47 through a coupling. When the first drive motor rotates in both directions, it drives the rotating ring 47 to rotate. The rotating ring 47 presses against each deep groove ball bearing 49 through the inner wall of its arc-shaped guide hole 471. Due to the rolling friction of the bearings, each connecting rod 44 is pushed to move along the trajectory of the arc-shaped guide hole 471. The design of the arc-shaped guide hole 471 allows the movement of the connecting rod 44 to be precisely converted into pure radial movement, thereby driving the four sliders 43 to slide synchronously inward or outward on the slide rail 42, realizing automatic centering and clamping or loosening of the workpiece. Limit blocks (not shown in the figure) are provided at both ends of the slide rail 42 to prevent the sliders 43 from falling out.

[0051] like Figure 4 and Figure 5As shown, the heat transfer unit 5 is positioned directly above the heat transfer station 33. It includes a lifting cylinder (lifting drive) 51 fixed to the frame 1 by a bracket, a pressure head mounting plate 52 connected to the cylinder piston rod, and an independent partitioned pressure module 53 installed below the pressure head mounting plate 52. The lifting cylinder drives the entire module to rise and fall. The independent partitioned pressure module 53 comprises a two-dimensional array of 64 pressure units 531 arranged in 8 rows × 8 columns. Each pressure unit 531 integrates a miniature electric cylinder and a pressure sensor, allowing independent control of its Z-axis extension stroke and output pressure. A metal heating plate (heating part) 532 is mounted at the bottom of each pressure unit 531, containing an electric heating tube and a thermocouple. A high-temperature resistant fluororubber pad is attached to the lower surface of the heating plate 532 as an elastic pressing pad 533. A sealing frame 541 is also fixed to the lower surface of the pressure head mounting plate 52, with a flexible silicone sealing skirt 542 connected to its bottom, together forming a local vacuum auxiliary device 54 around the pressure unit array. The sealing skirt 542 has an inwardly facing sealing flange 543 on the inner side of its bottom. The vacuum generating device 544 is connected to the cavity enclosed by the sealing frame 541 through a pipeline.

[0052] The vacuum generating device 544 in this equipment, such as a vacuum pump or vacuum generator, is a mature, existing technology component widely used in the industrial field. In a specific implementation of this invention, the vacuum generating device is connected to a reserved interface on the sealing frame via a pipe with sufficient elasticity and flexibility (e.g., a corrugated pipe or spiral protective pipe). This pipe design is crucial because the pressure head mounting plate 52 of the heat transfer unit 5 and the entire independent partitioned pressure module 53 installed below it will undergo significant vertical movement driven by the lifting cylinder 51. The use of flexible pipes ensures that the vacuum pipe remains reliably connected and does not interfere, entangle, or get damaged during the up-and-down movement of the pressure head. The start and stop of the vacuum generating device 544 are controlled by the control system according to a preset process sequence (usually started after the pressure unit 531 adaptively adheres to the workpiece surface and before heating begins, and shut down after the transfer is completed and the pressure unit is depressurized). It is important to emphasize that the innovation of this invention lies not in the vacuum generating device or the flexible tubing itself, but in the creative integration of this existing vacuum system into the independent partitioned pressure module 53, which, together with the sealing frame 541 and the flexible sealing skirt 542, constitutes a local vacuum assistance device 54. Furthermore, this vacuum assistance step is arranged after each pressure unit 531 has moved independently according to the three-dimensional topography data and achieved precise physical bonding. This system-level process combination and structural integration of "first partitioned adaptive mechanical bonding, then local vacuuming" can more effectively eliminate residual air between the transfer film and the complex curved surface workpiece, representing a significant improvement over existing thermal transfer technology.

[0053] The three-dimensional topography scanning unit 6 is a laser three-dimensional scanner, which is fixedly installed on the frame 1, and its scanning head is precisely aligned with the surface of the workpiece to be tested on the detection station 32.

[0054] This embodiment also includes a central control system (not shown in the figure, but it is the logic control hub of the equipment). This system is essentially an industrial computer or programmable logic controller (PLC) system integrating motion control, data acquisition, logic processing, and temperature regulation functions. Its specific implementation and functions are as follows: The system establishes electrical connections with all key actuators and sensing units of the equipment through standard industrial fieldbuses (such as EtherCAT, PROFINET) or analog / digital I / O modules, forming a centralized control network. Specific connected objects include:

[0055] Three-dimensional topography scanning unit 6: Receives the high-density three-dimensional point cloud data it acquires. Drivers and sensors in each independent pressure application unit 531: Send precise stroke commands to the miniature electric cylinder within each pressure application unit; simultaneously, read the feedback signals from its integrated pressure sensor in real time, forming a high-precision closed-loop pressure control.

[0056] Thermostats for each heating plate 532: Set and monitor the real-time temperature of each heating zone to achieve precise closed-loop control of zoned temperature.

[0057] The first drive motor (used to drive the rotating ring of the self-centering fixture) and the second drive motor (used to drive the cam divider): control their start / stop, speed and direction to achieve workpiece clamping / unclamping and precise indexing and positioning of the turntable.

[0058] Lifting cylinder 51 (such as a solenoid valve or servo motor on the cylinder): controls the overall lifting action of the heat transfer unit.

[0059] Vacuum generator 544: controls its start and stop to cooperate with the pressing process.

[0060] The system is electrically connected to the 3D topography scanning unit 6, the drivers and sensors of each pressure application unit 531, the first drive motor, the second drive motor, the lifting cylinder 51, the vacuum generator 544, and the temperature controllers of each heating plate 532, coordinating and controlling the operation of the entire device. The innovation of this control system lies not in its hardware itself (all are mature industrial components), but in the aforementioned dedicated control software algorithm and system integration method. It transforms 3D topography scanning data into differentiated and dynamic control commands for the densely arrayed execution units in real time, achieving a deep integration of online measurement, rapid planning, and adaptive precise pressure application for complex surfaces. This control logic is the core of ensuring that the device of this invention can overcome the shortcomings of existing technologies and achieve high-quality transfer printing.

[0061] like Figure 6As shown, the process of heat transfer printing on artificial stone slabs using the above-mentioned equipment includes the following steps:

[0062] S1. Loading and Fixing: A clean artificial stone slab (workpiece) covered with transfer film is placed on the self-centering fixture at the loading station 31 by a manual or robotic arm. The control system starts the first drive motor, which drives the rotating ring 47 to rotate, causing the four clamping parts 45 to move synchronously towards the center until the sides of the workpiece are firmly clamped, thus completing the centering and fixing.

[0063] S2. Shape Inspection: The rotary drive mechanism 2 is activated, driving the turntable 3 to rotate 90 degrees clockwise, so that the workpiece-holding support unit 4 accurately stops at the inspection station 32. The three-dimensional shape scanning unit 6 scans the upper surface of the workpiece to obtain high-precision three-dimensional point cloud data, which is then transmitted to the control system.

[0064] S3. Data Processing and Planning: The control system analyzes and processes the three-dimensional topography data, and, combined with the physical properties of the transfer film (such as elasticity and thickness), calculates the target downward stroke required for each of the 64 pressure units 531 during the pressing process (to ensure that the elastic pressing pad 533 just contacts and slightly compresses the bonding surface), as well as the optimal pressure value that needs to be applied in that area to achieve uniform and effective transfer. This step provides precise instructions for subsequent adaptive pressing.

[0065] S4. Conveying and Positioning: After the planning is completed, the turntable 3 rotates 90 degrees again to convey the workpiece to the heat transfer station 33 and accurately position it directly below the heat transfer unit 5.

[0066] S5. Zonal Adaptive Hot Pressing: The control system activates the lifting cylinder 51, lowering the entire heat transfer unit 5 to the working height. Subsequently, the 64 pressure units 531 begin to operate independently according to their respective target stroke commands, extending at different speeds until the elastic pressing pads 533 of all units adaptively adhere to the transfer film on the workpiece surface. Next, the control system activates the vacuum generator 544, using the local vacuum auxiliary device 54 to extract air from the sealed area. Then, the control system outputs its planned pressure value for each pressure unit 531, and simultaneously powers all heating plates 532 to heat them to the preset transfer temperature (e.g., 180°C). The heat transfer process is completed by maintaining the set temperature and pressure for a certain time (e.g., 60 seconds).

[0067] S6. Reset and Unloading: After the transfer time is reached, heating stops, each pressure unit 531 is depressurized and retracts to its original position, the vacuum is released, and the lifting cylinder 51 drives the heat transfer unit 5 to rise and reset. The turntable 3 rotates the last 90 degrees, conveying the carrying unit 4 containing the transferred workpiece to the unloading station 34. The self-centering fixture is released, and the finished product is removed manually or by a robot. The equipment then enters the next work cycle.

[0068] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0069] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A zoned pressure heat transfer printing device for artificial stone slabs, characterized in that: Including racks; A rotary drive mechanism, mounted on the frame, provides intermittent rotary indexing motion at its output end; The turntable is fixedly connected to the output end of the rotary drive mechanism, and at least four processing stations are evenly arranged around its circumference. The processing stations include at least a loading station, an inspection station, a heat transfer station, and a unloading station. Multiple workpiece carrying units are fixed to each processing station of the turntable in a one-to-one correspondence. Each workpiece carrying unit includes a self-centering fixture for carrying and laterally positioning the workpiece. The self-centering fixture includes a base fixed on the turntable; At least three sets of radial linear guide mechanisms are evenly arranged circumferentially on the base; The number of gripper assemblies is the same as that of the guide mechanism. Each gripper assembly includes a slider that slides with the guide mechanism, a connecting rod connected to the slider, and a clamping member disposed at the end of the connecting rod away from the center of the base. A central synchronization mechanism is rotatably disposed at the center of the base, and the central synchronization mechanism has an arc-shaped guide through hole with the same number as the gripper assembly; In this configuration, the end of each connecting rod near the central synchronization mechanism is slidably inserted into the corresponding arc-shaped guide through hole, and the outer wall of each connecting rod is slidably connected to the central synchronization mechanism at the arc-shaped guide through hole through a bearing, so that when the central synchronization mechanism rotates around its axis, it can push each connecting rod to move along the trajectory of its corresponding arc-shaped guide through hole through the bearing, thereby driving all the gripper assemblies to move synchronously radially. The base has a central positioning shaft at its center; the central synchronization mechanism includes a rotating ring that is sleeved on the central positioning shaft by a bearing and can rotate around it, and an arc-shaped guide hole is opened on the rotating ring; each of the connecting rods slides through a portion of the arc-shaped guide hole, and its outer side wall contacts the inner wall of the rotating ring through a deep groove ball bearing; The self-centering fixture also includes a drive assembly, which includes a first drive motor mounted on the bottom of the turntable. The output shaft of the first drive motor passes through the central positioning shaft and is drivenly connected to the rotating ring. At least one heat transfer unit is disposed above the heat transfer station; the heat transfer unit includes a lifting driver fixed to the frame, a pressure head mounting plate connected to the driving end of the lifting driver, and an independent partition pressure module installed below the pressure head mounting plate; the independent partition pressure module includes a two-dimensional array composed of multiple pressure units that can independently control the Z-axis stroke and output pressure; each pressure unit is provided with a heating part at its bottom end and an elastic pressing pad installed on the lower surface of the heating part.

2. The artificial stone slab zoned pressure heat transfer equipment according to claim 1, characterized in that: The linear guide mechanism is a slide rail that cooperates with the slider, and each end of the slide rail is provided with a limiting block.

3. The artificial stone slab zoned pressure heat transfer equipment according to claim 1, characterized in that: The heating element is a metal heating plate with an embedded heating element and temperature sensor; the elastic pressing pad is a high-temperature resistant silicone pad, a fluororubber pad, or a ceramic fiber composite pad.

4. The artificial stone slab zoned pressure heat transfer equipment according to claim 1, characterized in that: It also includes a three-dimensional topography scanning unit, which is fixed on the frame and set corresponding to the detection station, and is used to acquire three-dimensional topography data of the upper surface of the workpiece located at the station.

5. The artificial stone slab zoned pressure heat transfer equipment according to claim 1, characterized in that: The independent zone pressure module also includes a local vacuum auxiliary device; the local vacuum auxiliary device includes a sealing frame fixed to the lower surface of the pressure head mounting plate and surrounding the pressure unit array, a flexible sealing skirt connected to the bottom of the sealing frame, and a vacuum generating device; the bottom inner side of the flexible sealing skirt is provided with a sealing flange for contacting the workpiece surface to form a closed space during pressing, and the vacuum generating device is connected to the closed space through a pipeline.

6. The artificial stone slab zoned pressure heat transfer equipment according to claim 1, characterized in that: The rotary drive mechanism includes a second drive motor and a cam divider fixedly connected to the output shaft of the second drive motor. The output shaft of the cam divider is fixedly connected to the center of the turntable.

7. The process of applying pressure and heat transfer to artificial stone slabs in a zoned manner, characterized by: The device used as described in any one of claims 1-6 comprises the following steps: S1. Loading and fixing: At the loading station, the artificial stone slab covered with transfer film is placed on the workpiece bearing unit and centered and clamped by the self-centering fixture. S2. Shape Inspection: The rotary drive mechanism drives the turntable to rotate, transporting the workpiece to the inspection station. The three-dimensional shape data of its surface is obtained by the three-dimensional shape scanning unit. Based on the data, the required target pressing stroke and applied pressure value are calculated for each independent pressing unit in the heat transfer unit. S3. Conveying and Positioning: The turntable continues to rotate, conveying the scanned workpiece to the heat transfer station; S4. Adaptive hot pressing in zones: The heat transfer unit descends, and each pressure unit operates independently according to its calculated target pressing stroke, so that the elastic pressing pad adaptively adheres to the workpiece surface; then, each pressure unit is controlled to apply its corresponding pressure value and start heating, and the transfer is completed at the set temperature and time. S5. Reset and unloading: After the transfer is completed, heating is stopped and the pressure of each pressure unit is released, and the heat transfer unit rises; the turntable continues to rotate, transporting the workpiece to the unloading station, and the self-centering fixture releases the workpiece and takes out the finished product.

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