Thermal transfer printing apparatus for ultra-thin artificial stone facing printing and method of use

Abstract

The present application relates to the field of stone equipment, and particularly relates to a heat transfer printing device for ultra-thin artificial stone facing printing and a use method, the heat transfer printing device comprising a heat transfer printing body, a buffer heat exchange assembly, a conveyor, a preheating assembly, a roller table feeding machine and a pretreatment assembly. The present application utilizes the preheating assembly and the pretreatment assembly to preheat and apply an adhesive to the stone plate; utilizes the downward movement of the pressing plate of the heat transfer printing body to press and heat, so that the transfer film and the stone plate are supported by the pressure-bearing heat conduction plate of the buffer heat exchange assembly to realize the delay clamping during the transfer heating; utilizes the state of the continued pressure holding clamping of the pressing plate after the heating is stopped to input cold liquid into the pressure-bearing heat conduction plate to continuously cool the heated stone plate, to realize the gradient heating, the temperature holding and the delay pressure holding of the stone plate from the preheating to the clamping heating, and to realize the shaping cooling through the clamping cooling, which can reduce the deformation risk of the ultra-thin artificial stone plate heat transfer printing and facilitate the separation of the transfer film and the stone plate, so as to improve the heat transfer printing effect.

Description

Technical Field

[0001] This invention relates to the field of stone equipment, specifically to a heat transfer printing device and method for printing on ultra-thin artificial stone surfaces. Background Technology

[0002] Heat transfer printing is a process of transferring ink or a layer from a pre-printed pattern onto the surface of a substrate using heat and pressure. It is widely used in printing patterns on stone surfaces. For example, the invention patent CN103753996B discloses a method for forming a pattern on the surface of artificial marble, which describes: "...the artificial marble before printing is heated in a hot air furnace at 160-180°C for 20-30 minutes..." or "...the artificial marble before printing is heated in a flatbed hot press at 180-220°C for 15-25 seconds to obtain the printed artificial marble..." While this disclosure provides methods for heat transfer printing on artificial marble, these methods all involve heating to 160°C or higher in a single step, and do not provide specific heat transfer equipment that can be implemented. As is well known, most artificial stone is made by bonding and curing natural crushed stone, sand, and gypsum fillers with cement and resin adhesives, followed by grinding and polishing. Continuous or rapid high-temperature heating makes it prone to deformation. This is especially true for ultra-thin artificial stone slabs with a thickness of 5mm or less. Rapid heating and cooling without external clamping can easily cause deformation, affecting the heat transfer effect. Therefore, controlling the thermal deformation of thin slabs through a heat transfer device is crucial. Thus, it is necessary to provide a heat transfer device for ultra-thin artificial stone. If this device can reduce the risk of deformation during heat transfer of ultra-thin artificial stone slabs by preheating the slab, performing gradient heating with clamping, maintaining heat and pressure, and then cooling with clamping for shaping, it can improve the heat transfer effect. Therefore, this case arises. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention discloses a heat transfer printing device and method for printing ultra-thin artificial stone veneers. The heat transfer printing device includes a heat transfer body, a buffer heat exchange component, a conveyor, a preheating component, a roller feeder, and a pretreatment component. The invention features a rewinding / unwinding component and a hot-pressing plate assembly that can move synchronously up and down on the heat transfer body. The transfer film on the rewinding / unwinding component can be stretched and intermittently moved, and the transfer film at the horizontally positioned section can adhere to the lower surface of the pressure plate of the hot-pressing plate assembly. The buffer heat exchange component includes a pressure-bearing heat conduction plate, an elastic buffer, and a cold liquid inlet pipe. The pressure-bearing heat conduction plate is positioned below and in contact with the upper half of the conveyor belt, while the pressure plate is positioned above the pressure-bearing heat conduction plate and the conveyor belt. The preheating component and the pretreatment component are located at one end of the heat transfer body, and each component is equipped with a heat radiation plate and a roller coating component. The preheating and pretreatment components can be used to preheat the stone slab to be printed and apply the adhesive, respectively. After the pressure plate moves down to apply pressure and heat, the transfer film and the stone slab can be buffered and supported by the pressure heat conduction plate to achieve delayed clamping during the transfer heating process. After the pressure plate stops heating, it continues to maintain pressure. After cold liquid is introduced into the pressure heat conduction plate, heat exchange can be carried out to continuously cool the heated stone slab in the clamped state. This allows the stone slab to achieve a gradient temperature rise and heat preservation and delayed pressure holding from preheating to clamping heating. The clamping cooling process can then be used for shaping and cooling, thereby reducing the risk of deformation during the heat transfer of ultra-thin artificial stone slabs. After shaping and cooling, the transfer film can be easily separated from the stone slab when the pressure plate moves up, thus improving the heat transfer effect.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A heat transfer printing device for printing on ultra-thin artificial stone veneers includes a heat transfer body. The heat transfer body has a frame, a winding and unwinding component, and a hot-pressing plate assembly. The winding and unwinding component and the hot-pressing plate assembly are placed within the frame and can move synchronously up and down within the frame. When the hot-pressing plate assembly moves downward, it can apply downward pressure. The hot-pressing plate assembly has a pressure plate and an electric heating element embedded in the pressure plate. The winding and unwinding component has a rolled-up transfer film that can be pulled open and moved intermittently. The opened and intermittently moved transfer film is horizontally arranged, and the horizontally arranged section of the transfer film can adhere to the lower surface of the pressure plate of the hot-pressing plate assembly. The device is characterized by further including a buffer heat exchange component, a preheating component, and a pretreatment component. The preheating component and the pretreatment component each have a heat radiation plate and a roller coating component. The preheating component and the pretreatment component can preheat the artificial stone slab to be printed and apply an adhesive, respectively. The preheating component and the pretreatment component are located at one end of the heat transfer body. The buffer heat exchange assembly includes a pressure-bearing heat conduction plate, an elastic buffer element, and a cold liquid inlet pipe. The pressure-bearing heat conduction plate has serpentine perforations inside. The cold liquid inlet pipe communicates with the interior of the pressure-bearing heat conduction plate. The elastic buffer element is positioned below the pressure-bearing heat conduction plate. The buffer heat exchange assembly is positioned below the heat transfer body, and the pressure plate of the heat transfer body corresponds to the pressure-bearing heat conduction plate of the buffer heat exchange assembly. The transfer film moved to the horizontal layout section and the preheated and pretreated stone slabs are both placed... Between the pressure plate and the pressure-bearing heat conduction plate, after the pressure plate of the heat transfer body moves down to apply pressure and heat, the transfer film can be made to adhere to the stone slab, and the stone slab can be buffered and supported by the pressure-bearing heat conduction plate. The pressure plate and the pressure-bearing heat conduction plate can perform heat-press transfer by delaying clamping of the transfer film and the stone slab. After the pressure plate stops heating and cold liquid is introduced into the interior of the pressure-bearing heat conduction plate, heat exchange can be carried out to cool down the heated stone slab so that the transfer film can be separated from the stone slab when the pressure plate moves up and to prevent the stone slab from deforming.

[0005] The heat transfer printing device for printing on ultra-thin artificial stone surfaces also includes a conveyor, which is a belt conveyor that can operate intermittently according to a rhythm. It includes a conveyor frame and a conveyor belt, which is a non-slip annular steel belt. The heat transfer body and the buffer heat exchange component are both placed in the middle section of the conveyor and are respectively placed above and below the upper half of the conveyor belt. The pressure-bearing heat conduction plate of the buffer heat exchange component is in contact with the back of the upper half of the conveyor belt. The preheated and pre-treated stone slab can be transported by the conveyor belt to the bottom of the heat transfer body and paused. Several guide blocks are evenly distributed on both sides of the working surface of the conveyor belt. The guide blocks on both sides correspond one-to-one and are symmetrical to each other. The guide blocks on both sides are arranged in a figure-eight shape, and the direction from the large opening to the small opening of the two guide blocks arranged in the figure-eight shape is consistent with the running direction of the conveyor belt. The spacing of the small opening matches the width of the stone slab to be printed. The guide blocks are made of flexible and heat-resistant rubber.

[0006] The conveyor also includes an electric roller, a tensioning component, an anti-deviation component, idlers, a driven roller, and a detection switch. The electric roller can rotate intermittently, and the detection switch is a photoelectric sensor switch. The detection switch is located in the middle section of the conveyor and on one side of the conveyor belt to detect when the stone slab moves to a position below the heat transfer body. The detection switch is mounted on the conveyor frame with a support rod.

[0007] The buffer heat exchange assembly also includes a support plate, a pressure sensor, a hot gas inlet pipe, and an outlet pipe. The support plate is positioned below an elastic buffer element, which is an air spring or a buffer airbag. Several elastic buffer elements are arranged in a matrix, with their upper and lower ends connected to the pressure-bearing heat conduction plate and the support plate, respectively. The pressure sensor is a distributed pressure sensor, embedded in an array on the upper part of the pressure-bearing heat conduction plate, with the working surface of the pressure sensor flush with the upper surface of the pressure-bearing heat conduction plate. The coolant inlet pipe is connected to the support plate... One end of the serpentine hole of the heat conduction plate is connected, and the other end of the serpentine hole is connected to the output pipe. One end of the hot gas input pipe is connected to one end of the serpentine hole, and the connected end of the serpentine hole is the end connected to the outlet of the cold liquid input pipe. An electric valve and a delivery pump are provided on the cold liquid input pipe, and an electric valve and a booster pump are provided on the hot gas input pipe. The inlet end of the cold liquid input pipe can be connected to an external chilled water source, the inlet end of the hot gas input pipe can be connected to an external heated air source, and the outlet end of the output pipe can be connected to an external water collection container.

[0008] The preheating component is also equipped with a protective cover and a temperature sensor. The protective cover is a square cavity cover with an opening facing downwards. The end walls at both ends of the protective cover are provided with clearance openings that allow stone slabs to pass through. The temperature sensor of the preheating component is placed inside the protective cover. The heat radiation plate is a far-infrared heating plate. The heat radiation plate is placed inside the protective cover and connected to the protective cover. The preheating component is placed above the conveyor, and its protective cover is connected to the conveyor frame.

[0009] The pretreatment assembly also includes a cleaning shovel, elastic clamping connectors, and a bracket. The cleaning shovel includes a shovel arm and a scraper blade. The lower end of the shovel arm has a downward-sloping inclined surface. The scraper blade is made of wear-resistant rubber and is connected to the inclined surface of the shovel arm. The elastic clamping connectors are configured in two sets. Each set of elastic clamping connectors has two pairs of elastic sliding connection pairs consisting of two sliding rods, two sliding sleeves, and two compression springs. The two pairs of elastic sliding connection pairs are symmetrically arranged. Each pair of elastic sliding connection pairs includes one sliding rod, one sliding sleeve, and one compression spring. One sliding rod slides into the corresponding sliding sleeve, and one compression spring is sleeved on the corresponding sliding sleeve. On the sliding rod, the sliding sleeve is embedded in the horizontal plate of the support. The cleaning shovel and the roller coating component are each slidably connected to the support by a set of elastic clamping connectors. The cleaning shovel can elastically abut against the surface of the stone slab to be pretreated. The roller coating component is equipped with a hanger and a roller brush. The roller brush is a circular non-powered roller brush with a cavity for storing adhesive inside and can be self-primed from its end by an electric pump. The roller brush is rotatably connected to the bottom of the hanger. The roller brush can elastically abut against the surface of the stone slab. When the stone slab moves horizontally, it can drive the roller brush to rotate by friction. The roller brush and the stone slab are elastically squeezed, and when the stone slab moves, the adhesive inside the roller brush can seep out from its surface.

[0010] The heat transfer printing device for printing on ultra-thin artificial stone surfaces also includes a roller conveyor. The roller conveyor is equipped with a roller frame, a drive unit, a chain drive unit, roller bodies, and positioning bars. The roller bodies consist of several pieces, which are rotatably connected to the roller frame and driven to rotate by the drive unit and the chain drive unit. The roller conveyor can move intermittently according to a set rhythm and can drive the stone slab forward. The two ends of the roller body are provided with limiting shoulders to restrict the left and right movement of the stone slab. The positioning bars are connected to one end of the roller frame and are used to position the stone slab during loading. The position of the positioning bars is adjustable. The pretreatment component is placed above the discharge end of the roller conveyor, and its support is connected to the roller frame.

[0011] The roller conveyor is located at the feed end of the conveyor. The roller conveyor can transfer the stone slabs onto the conveyor belt. The rhythm of the intermittent movement of the roller conveyor driving the stone slabs is consistent with the rhythm of the intermittent movement of the stone slabs driven by the conveyor.

[0012] The frame of the heat transfer body includes an outer frame, an inner frame, a cylinder, guide pillars, and guide sleeves. The inner frame is suspended inside the outer frame. The cylinder is located between the top plate of the outer frame and the upper frame plate of the inner frame, with the cylinder body connected to the top plate of the outer frame. The cylinder rod is hinged to the upper frame plate of the inner frame. There are four guide pillars and four guide sleeves, which are respectively connected to the four corner areas of the upper frame plate of the inner frame and the top plate of the outer frame. The guide pillars can be slidably inserted into the guide sleeves, and the cylinder can drive the inner frame to move up and down.

[0013] The winding and unwinding assembly also includes a winding mechanism, an unwinding mechanism, a redirecting roller, and a correction mechanism. The winding and unwinding mechanisms are both located on the upper part of the inner frame and are rotatably connected to the upper frame plate of the inner frame. There are two redirecting rollers, which are rotatably connected to the lower frame plate of the inner frame. The two redirecting rollers are placed horizontally. The transfer film passes around the two redirecting rollers, and one end of the film is connected to the unwinding roller of the unwinding mechanism and is wound by the unwinding roller. The other end of the film is connected to the winding roller of the winding mechanism and can be pulled and wound by the winding roller. The winding mechanism and the unwinding mechanism are respectively equipped with a winding motor and an unwinding motor that can be servo-controlled and move intermittently. The winding motor and the unwinding motor can move in coordination to make the transfer film move intermittently and at a constant speed.

[0014] The pressure plate is a heat-conducting flat plate with a temperature sensor inside, and the electric heating element is an electric heating plate.

[0015] The heat transfer printing device for printing ultra-thin artificial stone veneers also includes an electrical control unit and a pneumatic control unit. The electrical control unit is equipped with a control motherboard, an intelligent control module, a servo controller, and a temperature controller. The pneumatic control unit is equipped with a solenoid valve that can control the start, stop, and reversal of the cylinders. The heat transfer body, buffer heat exchange assembly, conveyor, preheating assembly, roller conveyor, and pneumatic control unit are all electrically connected to the electrical control unit. The cylinders are connected to the pneumatic control unit via air circuits. The electrical control unit can set the intermittent movement rhythm of the transfer film of the heat transfer body, as well as the pressure threshold, heating temperature threshold, and duration of delayed heat preservation and pressure holding for the hot press plate assembly. The electrical control unit can also set the preheating temperature threshold of the heat radiation plate of the preheating assembly. The electrical control unit can also set the intermittent operation rhythm of the conveyor and roller conveyor. The system receives and analyzes detection information collected by pressure sensors, detection switches, and temperature sensors. The electronic control unit (ECU) can instruct the roller conveyor and conveyor to operate, as well as instruct the preheating components to start and stop preheating. This causes the slabs to be transferred to move intermittently for cleaning and coating with adhesive, and after preheating, they are moved to a position below the heat transfer body and paused. The ECU can also instruct the heat transfer body to operate and the hot press plate assembly to start and stop heating, causing the transfer film to move intermittently and the hot press plate assembly to press down and heat, while maintaining heat and pressure for a prolonged period. The ECU can instruct the pump and electric valve on the cold liquid inlet pipe of the buffer heat exchange assembly to operate, thereby cooling the pressure-bearing heat conduction plate and the slabs above it. The ECU can also instruct the booster pump and electric valve on the hot air inlet pipe to operate, causing the cold liquid inside the pressure-bearing heat conduction plate to drain rapidly and the temperature of the pressure-bearing heat conduction plate to rise again.

[0016] The method of using the heat transfer printing device for printing ultra-thin artificial stone veneers includes the following steps: Step a. The transfer film is attached to the heat transfer body. First, the pattern to be transferred is printed on the base film using an external printer with heat-sublimable ink to form a transfer film. Several sets of the same or different patterns are distributed at equal intervals on the long-format transfer film. The transfer film, which is wound on the unwinding roller of the unwinding mechanism, passes around the deflecting roller and adheres to the pressure plate of the heat press assembly. Then, it is pulled and wound up by the winding roller of the winding mechanism. The transfer film can move intermittently, and after each movement, a set of patterns corresponds to the pressure plate. Step b. Loading: The stone slab to be transferred is manually placed on the roller conveyor and positioned by the positioning bars; Step c. The electrical control unit instructs the roller feeder and conveyor to start operation, and instructs the heat radiation plate of the preheating component to open. The stone slab placed on the roller feeder moves and passes through the cleaning shovel of the pretreatment component to clean the surface foreign objects. Then, the roller brush of the coating component applies the adhesive. The pretreated stone slab is sent to the intermittently running conveyor belt and enters the preheating component to pause and preheat. The maximum preheating temperature does not exceed 80°C. After the set preheating temperature is reached, the heat radiation plate stops heating. Step d. The preheated slab is conveyed by an intermittently running conveyor belt to a stop below the heat transfer body; Step e. The electronic control unit commands the heat transfer body to move and commands the hot press plate assembly to start heating, driving the hot press plate assembly to press down and heat, and delay heat preservation and pressure maintenance. During the pressing process, the stone plate is buffered and supported by the pressure-bearing heat conduction plate under the conveyor belt so that the transfer film and the stone plate are clamped. Step f. The electronic control unit instructs the heat press plate assembly of the heat transfer body to stop heating, and instructs the delivery pump and electric valve on the cold liquid input pipe of the buffer heat exchange assembly to open, so that the externally supplied cold liquid cools down the pressure heat conduction plate and the stone slab above it. Step g. The electronic control unit instructs the hot press plate assembly to stop holding pressure and instructs the heat transfer body to rise and the transfer film to move intermittently. At this time, the transfer film and the stone plate are released from clamping. After the transfer film is released from the stone plate, it moves intermittently to replace the next set of patterns to correspond with the pressure plate. Step h. The electrical control unit instructs the conveyor to start intermittently again and instructs the conveying pump and electric valve on the cold liquid input pipe to close. Then, it instructs the booster pump and electric valve on the hot air input pipe to open. The externally supplied pressurized heating air can quickly drain the cold liquid inside the pressure heat conduction plate to stop cooling and make the temperature of the pressure heat conduction plate rise. At this time, the stone slab that has completed the heat transfer is removed from above the pressure heat conduction plate of the buffer heat exchange component and can be unloaded manually. Step i. Repeat steps b to h continuously. When the conveyor is running intermittently, the roller feeder runs intermittently, feeding and transferring materials intermittently to form a continuous operation.

[0017] As can be seen from the above description, the advantages of the heat transfer printing device and method for printing ultra-thin artificial stone veneer provided by the present invention are as follows: Firstly, the heat transfer body is provided with a take-up and untake-up winding component and a hot pressing plate assembly that can move up and down synchronously. The transfer film of the take-up and untake-up winding component can be pulled and unfolded and can move intermittently. The transfer film that moves to the horizontal layout section can be attached to the lower surface of the pressure plate of the hot pressing plate assembly. The buffer heat exchange component is provided with a pressure-bearing heat conduction plate, an elastic buffer component and a cold liquid inlet pipe. The pressure-bearing heat conduction plate is placed below the upper half of the conveyor belt and is attached to the conveyor belt. The pressure plate is placed above the pressure-bearing heat conduction plate and the conveyor belt. The preheating component and the pretreatment component are placed at one end of the heat transfer body and are respectively provided with a heat radiation plate and a roller coating component. The preheating and pretreatment components allow for preheating and application of adhesive to the stone slab to be printed, respectively. Pressurization and heating via a downward-moving pressure plate buffer and support the transfer film and stone slab, achieving delayed clamping during the transfer heating process. After heating stops, the pressure plate continues to maintain pressure, and the introduction of cold liquid into the heat-conducting plate facilitates heat exchange, continuously cooling the clamped stone slab. This allows for a gradient heating and holding process from preheating to clamping heating, followed by delayed pressure holding. The clamping cooling process further reduces the risk of deformation during heat transfer of ultra-thin artificial stone slabs. The cooled slab also facilitates separation of the transfer film from the stone slab when the pressure plate is moved upwards, improving the heat transfer effect. Secondly, the pretreatment component cleans the surface of the stone slab of foreign matter and applies adhesive, resulting in better adhesion of the heat-transferred pattern. Thirdly, by setting up a roller conveyor and a conveyor, and utilizing the intermittent operation of the roller conveyor and the intermittent movement of the transfer film during the intermittent operation of the conveyor, a continuous production line can be achieved, thereby improving the efficiency of heat transfer printing. This invention is rationally designed, simple in structure, low in cost, and easy to promote. Attached Figure Description

[0018] Figure 1 This is a general schematic diagram of the heat transfer printing device for printing ultra-thin artificial stone veneers according to the present invention; Figure 2 This is an enlarged schematic diagram of the heat transfer body; Figure 3 for Figure 2 A magnified diagram of AA in the image; Figure 4 This is an enlarged schematic diagram of the frame; Figure 5 This is an enlarged schematic diagram of the winding and unwinding components; Figure 6 This is an enlarged schematic diagram of the hot press plate assembly; Figure 7 This is an enlarged schematic diagram of the buffer heat exchange component; Figure 8 for Figure 7 Enlarged diagram of direction B in the diagram; Figure 9 for Figure 7 A magnified view of CC in the diagram; Figure 10 This is a schematic diagram of a conveyor. Figure 11 for Figure 10 A magnified diagram of DD in the image; Figure 12 A schematic diagram showing the layout of guide blocks on a conveyor belt; Figure 13 This is an enlarged schematic diagram of the preheating component; Figure 14 for Figure 13 Enlarged diagram of EE in the image; Figure 15 This is an enlarged schematic diagram of a roller conveyor feeder; Figure 16 for Figure 15 A magnified diagram of FF in the image; Figure 17 This is an enlarged schematic diagram of the preprocessing components; Figure 18 An enlarged schematic diagram of a cleaning shovel; Figure 19 This is an enlarged schematic diagram of the roller-coated component; Figure 20 for Figure 19 A magnified diagram of the G direction in the diagram.

[0019] Figure label: 1. Heat transfer body; 11. Frame; 111. Outer frame; 112. Inner frame; 113. Cylinder; 114. Guide post; 115. Guide sleeve; 12. Take-up and unwinding assembly; 121. Take-up mechanism; 122. Unwinding mechanism; 123. Redirecting roller; 124. Transfer film; 125. Web guiding mechanism; 13. Hot press plate assembly; 131. Pressure plate; 132. Electric heating element; 2. Buffer heat exchange assembly; 21. Pressure-bearing heat conduction plate; 211. Serpentine hole; 22. Support plate; 23. Elastic buffer element; 2 4 Pressure sensor; 25 Cold liquid inlet pipe; 26 Hot gas inlet pipe; 27 Output pipe; 3 Conveyor; 31 Conveyor belt; 311 Guide block; 32 Detection switch; 4 Preheating assembly; 41 Protective cover; 42 Heat radiation plate; 5 Roller conveyor; 51 Roller body; 52 Positioning stop bar; 6 Pretreatment assembly; 61 Cleaning shovel; 611 Shovel arm; 612 Shovel blade; 62 Roller coating component; 621 Hanger; 622 Roller brush; 63 Elastic clamping connector; 64 Bracket. Detailed Implementation

[0020] The present invention will be further described below through specific embodiments.

[0021] like Figure 1 As shown, the heat transfer printing device for printing ultra-thin artificial stone veneer according to the present invention includes a heat transfer body 1, a buffer heat exchange component 2, a conveyor 3, a preheating component 4, a roller feeder 5, and a pretreatment component 6. The heat transfer body 1 is placed above the buffer heat exchange component 2 and above the conveyor 3. The buffer heat exchange component 2 is placed below the upper half of the conveyor belt 31 of the conveyor 3, and its upper surface is in contact with the conveyor belt 31. The roller feeder 5 is placed at the end of the feed end of the conveyor 3. The preheating component 4 is placed at the feed end of the heat transfer body 1 and above the conveyor 3. The pretreatment component 6 is placed above the discharge end of the roller feeder 5.

[0022] like Figures 1 to 3 As shown, the heat transfer body 1 of the present invention is provided with a frame 11, a take-up and untake-up winding assembly 12 and a hot press plate assembly 13. The take-up and untake-up winding assembly 12 and the hot press plate assembly 13 are placed in the frame 11 and can move up and down synchronously in the frame 11. When the hot press plate assembly 13 moves down, it can apply downward pressure. The heat transfer body 1 is a known technology.

[0023] like Figures 1 to 4 As shown, the frame 11 of the present invention includes an outer frame 111, an inner frame 112, a cylinder 113, guide posts 114, and guide sleeves 115. The inner frame 112 is suspended inside the outer frame 111. The cylinder 113 is placed between the top plate of the outer frame 111 and the upper frame plate of the inner frame 112, and the cylinder body of the cylinder 113 is connected to the top plate of the outer frame 111. The cylinder rod of the cylinder 113 is hinged to the upper frame plate of the inner frame 112. There are four guide posts 114 and four guide sleeves 115. The four guide posts 114 and four guide sleeves 115 are respectively connected to the four corner areas of the upper frame plate of the inner frame 112 and the top plate of the outer frame 111. The guide posts 114 can be slidably inserted into the guide sleeves 115. The cylinder 113 can drive the inner frame 112 to move up and down.

[0024] like Figures 1 to 5As shown, the winding and unwinding assembly 12 of the present invention includes a winding mechanism 121, an unwinding mechanism 122, a redirecting roller 123, a transfer film 124, and a web-correcting mechanism 125. The winding mechanism 121 and the unwinding mechanism 122 are both located on the upper part of the inner frame 112 and are rotatably connected to the upper frame plate of the inner frame 112. Two redirecting rollers 123 are provided, rotatably connected to the lower frame plate of the inner frame 112, and are placed horizontally. The transfer film 124 bypasses two redirecting rollers 123, with one end connected to the unwinding roller of the unwinding mechanism 122 and wound by it. Its other end is connected to the winding roller of the winding mechanism 121 and can be pulled and wound by the winding roller. The winding mechanism 121 and the unwinding mechanism 122 are respectively equipped with a servo-controlled and intermittently movable winding motor and an unwinding motor. The winding motor and the unwinding motor can move in tandem to make the transfer film 124 move intermittently and at a constant speed. The transfer film 124 can be pulled and unfolded by the winding mechanism 121 and can move intermittently. The transfer film 124, unfolded and intermittently moved between the two redirecting rollers 123 at the bottom, is horizontally arranged.

[0025] like Figures 1 to 6 As shown, the hot press assembly 13 of the present invention includes a pressure plate 131 and an electric heating element 132. The pressure plate 131 is a heat-conducting flat plate, and a temperature sensor is provided inside it (not shown in the figures). The electric heating element 132 is an electric heating plate, which is embedded in the pressure plate 131. The transfer film 124, which unfolds and intermittently moves to the horizontally arranged section, can adhere to the lower surface of the pressure plate 131 of the hot press assembly 13.

[0026] like Figure 1 , Figures 7 to 9As shown, the buffer heat exchange assembly 2 of the present invention includes a pressure-bearing heat conduction plate 21, a support plate 22, an elastic buffer element 23, a pressure sensor 24, a cold liquid inlet pipe 25, a hot gas inlet pipe 26, and an outlet pipe 27. The pressure-bearing heat conduction plate 21 is a thermally conductive rigid flat plate with serpentine holes 211 inside. The elastic buffer element 23 is placed below the pressure-bearing heat conduction plate 21, and the support plate 22 is placed below the elastic buffer element 23. The elastic buffer element 23 is an air spring or a buffer airbag, and there are several elastic buffer elements 23 arranged in a matrix, with their upper and lower ends connected to the pressure-bearing heat conduction plate 21 and the support plate 22, respectively. The pressure sensor 24 is a distributed pressure sensor, which is embedded in the pressure-bearing heat conduction plate 21 in an array. The upper part of plate 21 and the working surface of pressure sensor 24 are flush with the upper surface of pressure heat conduction plate 21. The cold liquid input pipe 25 is connected to one end of the serpentine hole 211 of pressure heat conduction plate 21, and the other end of the serpentine hole 211 is connected to the output pipe 27. One end of hot gas input pipe 26 is connected to one end of the serpentine hole 211, and the connected end of the serpentine hole 211 is the end connected to the outlet of cold liquid input pipe 25. An electric valve and a delivery pump are provided on cold liquid input pipe 25, and an electric valve and a booster pump are provided on hot gas input pipe 26. The inlet end of cold liquid input pipe 25 can be connected to an external chilled water source, the inlet end of hot gas input pipe 26 can be connected to an external heated air source, and the outlet end of output pipe 27 can be connected to an external water collection container.

[0027] like Figure 1 , Figures 10 to 12 As shown, the conveyor 3 of this invention is a belt conveyor that can operate intermittently according to a rhythm. The conveyor 3 is a known technology and includes a conveyor frame, a conveyor belt 31, an electric drum, a tensioning component, an anti-deviation component, idlers, a driven drum, and a detection switch 32. The electric drum can rotate intermittently. The conveyor belt 31 is an anti-slip annular steel belt. Several guide blocks 311 are evenly distributed on both sides of the working surface of the conveyor belt 31. The several guide blocks 311 on both sides correspond one-to-one and are symmetrical to each other. The guide blocks 311 on both sides are arranged in a figure-eight shape, and the direction from the large opening to the small opening of the two guide blocks 311 arranged in the figure-eight shape is consistent with the running direction of the conveyor belt 31. The spacing of the small opening matches the width of the stone slab to be printed. The guide blocks 311 are made of flexible and heat-resistant rubber. The detection switch 32 is a photoelectric sensor switch. The detection switch 32 is placed in the middle section of the conveyor 3 and on one side of the conveyor belt 31 to detect when the stone slab moves to a position below the heat transfer body 1. The detection switch 32 is mounted on the conveyor frame with a support rod.

[0028] like Figure 1 , Figure 13 and Figure 14As shown, the preheating component 4 of this invention includes a protective cover 41, a thermal radiation plate 42, and a temperature sensor. The protective cover 41 is a square cavity with an opening facing downwards, and its end walls at both ends are provided with clearance openings to allow the stone slab to pass through. The temperature sensor of the preheating component 4 is placed inside the protective cover 41 and is not shown in the attached figure. The thermal radiation plate 42 is a far-infrared heating plate, which is placed inside and connected to the protective cover 41. The preheating component 4 is placed above the conveyor 3, and its protective cover 41 is connected to the conveyor frame. The preheating component 4 can preheat the artificial stone slab to be printed.

[0029] like Figure 1 , Figures 15 to 17 As shown, the roller conveyor 5 of the present invention is provided with a roller conveyor frame, a drive unit, a chain drive unit, roller bodies 51 and positioning baffles 52. The roller bodies 51 are composed of several pieces, which are rotatably connected to the roller conveyor frame and driven to rotate by the drive unit and the chain drive unit. The roller conveyor 5 can move intermittently according to a set rhythm and can drive the stone slabs forward. The two ends of the roller bodies 51 are provided with limiting shoulders to restrict the left and right movement of the stone slabs. The positioning baffles 52 are connected to one end of the roller conveyor frame. The positioning baffles 52 are used to position the stone slabs during loading, and the position of the positioning baffles 52 is adjustable. The pretreatment component 6 is placed above the discharge end of the roller conveyor 5, and its bracket 64 is connected to the roller conveyor frame.

[0030] like Figure 1 , Figures 17 to 20As shown, the pretreatment component 6 of the present invention further includes a cleaning shovel 61, a roller coating component 62, an elastic clamping connector 63, and a bracket 64. The cleaning shovel 61 includes a shovel arm 611 and a scraper blade 612. The lower end of the shovel arm 611 has a downward inclined surface. The scraper blade 612 is made of wear-resistant rubber and is connected to the inclined surface of the shovel arm 611. The elastic clamping connector 63 is provided in two groups. Each group of elastic clamping connectors 63 has two pairs of elastic sliding connection pairs composed of two sliding rods, two sliding sleeves, and two compression springs. The two pairs of elastic sliding connection pairs are symmetrically arranged. Each pair of elastic sliding connection pairs includes one sliding rod, one sliding sleeve, and one compression spring. One sliding rod is slidably inserted into the corresponding sliding sleeve, and one compression spring is sleeved on the corresponding sliding rod. The sliding sleeve is embedded in the bracket. On the horizontal plate 64, the cleaning shovel 61 and the roller coating component 62 are each slidably connected to the bracket 64 by a set of elastic clamping connectors 63. The cleaning shovel 61 can elastically abut against the surface of the stone slab to be pretreated. The roller coating component 62 is provided with a hanger 621 and a roller brush 622. The roller brush 622 is a circular non-powered roller brush with a cavity for storing adhesive inside and can be self-primed from its end by an electric pump. The roller brush 622 is a known technology. The roller brush 622 is rotatably connected to the bottom of the hanger 621. The roller brush 622 can elastically abut against the surface of the stone slab. When the stone slab moves horizontally, it can drive the roller brush 622 to rotate by friction. The roller brush 622 elastically presses against the stone slab, and when the stone slab moves, the adhesive inside the roller brush 622 can seep out from its surface to apply the adhesive to the artificial stone slab to be printed.

[0031] like Figures 1 to 20 As shown, the roller conveyor 5 of this invention can transfer stone slabs onto the conveyor belt 31 of the conveyor 3. The rhythm of the intermittent movement of the roller conveyor 5 driving the stone slabs to move is consistent with the rhythm of the intermittent movement of the stone slabs driven by the conveyor 3. The heat transfer body 1 and the buffer heat exchange assembly 2 are both placed in the middle section of the conveyor 3 and respectively above and below the upper half of the conveyor belt 31 of the conveyor 3. The pressure plate 131 of the heat transfer body 1 corresponds to the pressure-bearing heat conduction plate 21 of the buffer heat exchange assembly 2. The pressure-bearing heat conduction plate 21 is attached to the back of the upper half of the conveyor belt 31 of the conveyor 3. The preheated and pre-treated stone slabs can be transported by the conveyor belt 31 to the area below the heat transfer body 1 and pause. The transfer film 124 and the stone slabs that have moved to the horizontal layout section are both placed on the pressure plate 131 and the pressure-bearing heat conduction plate 21. Between the plates 21, after the pressure plate 131 of the heat transfer body 1 moves down to apply pressure and heat, the transfer film 124 can be attached to the stone slab, and the stone slab can be buffered and supported by the pressure-bearing heat conduction plate 21. The pressure plate 131 and the pressure-bearing heat conduction plate 21 can perform heat-press transfer by delaying the clamping of the transfer film 124 and the stone slab. After the pressure plate 131 stops heating and cold liquid is introduced into the interior of the pressure-bearing heat conduction plate 21, heat exchange can be carried out to cool down the heated stone slab so that the transfer film 124 can be separated from the stone slab when the pressure plate 131 moves up and to prevent the stone slab from deforming.

[0032] like Figures 1 to 20 As shown, the heat transfer printing device for printing ultra-thin artificial stone veneers according to the present invention further includes an electrical control unit and a pneumatic control unit, which are not shown in the accompanying drawings. The electrical control unit is equipped with a control motherboard, an intelligent control module, a servo controller, and a temperature controller. The pneumatic control unit is equipped with a solenoid valve that can control the start, stop, and reversal of the cylinder. The heat transfer body 1, the buffer heat exchange component 2, the conveyor 3, the preheating component 4, the roller conveyor 5, and the pneumatic control unit are all electrically connected to the electrical control unit. The cylinder 113 is connected to the pneumatic control unit via an air circuit. The electrical control unit can set the intermittent movement rhythm of the transfer film 124 of the heat transfer body 1, as well as the pressure threshold, heating temperature threshold, and duration of delayed heat preservation and pressure holding of the hot press plate assembly 13. The electrical control unit can also set the preheating temperature threshold of the heat radiation plate 42 of the preheating component 4. The electrical control unit can also set the intermittent operation rhythm of the conveyor 3 and the roller conveyor 5. The electrical control unit can accept pressure sensors 24, detection switches 32, and temperature sensors. The detection information collected by the sensors is analyzed and processed. The electronic control unit can instruct the roller feeder 5 and the conveyor 3 to operate, and instruct the preheating component 4 to start and stop preheating. This causes the stone slab to be transferred to move intermittently for cleaning and coating with adhesive, and after preheating, it is moved to a position below the heat transfer body 1 and paused. The electronic control unit can instruct the heat transfer body 1 to operate, and instruct the hot press plate assembly 13 to start and stop heating. This causes the transfer film 124 to move intermittently, and causes the hot press plate assembly 13 to press down and heat, and to maintain heat and pressure for a delay. The electronic control unit can instruct the conveying pump and electric valve on the cold liquid inlet pipe 25 of the buffer heat exchange component 2 to operate, so as to cool down the pressure heat conduction plate 21 and the stone slab above it. The electronic control unit can instruct the booster pump and electric valve on the hot air inlet pipe 26 to operate, so as to cause the cold liquid inside the pressure heat conduction plate 21 to drain quickly and the temperature of the pressure heat conduction plate 21 to rise.

[0033] The method of using the heat transfer printing device for printing ultra-thin artificial stone veneers according to the present invention includes the following steps: Step a. The transfer film 124 is connected to the heat transfer body 1. First, the pattern to be transferred is printed on the base film using an external printer with heat-sublimable ink to form the transfer film 124. Several sets of the same or different patterns are distributed at equal intervals on the long-format transfer film 124. The transfer film 124, which is wound on the unwinding roller of the unwinding mechanism 122, passes around the redirecting roller 123 and adheres to the pressure plate 131 of the heat press assembly 13. Then, it is pulled and wound up by the winding roller of the winding mechanism 121. The transfer film 124 can move intermittently, and after each movement, a set of patterns corresponds to the pressure plate 131. Step b. Loading: The stone slab to be transferred is manually placed on the roller conveyor feeder 5 and positioned by the positioning baffle 52; Step c. The electrical control unit instructs the roller feeder 5 and the conveyor 3 to start operation, and instructs the heat radiation plate 42 of the preheating component 4 to open. The stone slab placed on the roller feeder 5 moves and passes through the cleaning shovel 61 of the pretreatment component 6 to clean the surface foreign objects. Then, the roller brush 622 of the coating component 62 applies the adhesive. The pretreated stone slab is sent to the intermittently running conveyor belt 31 and enters the preheating component 4 to pause and preheat. The maximum preheating temperature does not exceed 80°C. After the set preheating temperature is reached, the heat radiation plate 42 stops heating. Step d. The preheated slab is conveyed by the intermittently running conveyor belt 31 to a stop below the heat transfer body 1; Step e. The electronic control unit commands the heat transfer body 1 to move and commands the hot press plate assembly 13 to start heating, driving the hot press plate assembly 13 to press down and heat up and delay heat preservation and pressure preservation. During the pressing process, the stone plate is buffered and supported by the pressure heat conduction plate 21 under the conveyor belt 31 so that the transfer film 124 and the stone plate are clamped. Step f. The electrical control unit instructs the heat press plate assembly 13 of the heat transfer body 1 to stop heating, and instructs the delivery pump and electric valve on the cold liquid input pipe 25 of the buffer heat exchange assembly 2 to open, so that the externally supplied cold liquid cools down the pressure heat conduction plate 21 and the stone slab above it. Step g. The electronic control unit instructs the hot press plate assembly 13 to stop holding pressure and instructs the heat transfer body 1 to rise and the transfer film 124 to move intermittently. At this time, the transfer film 124 and the stone plate are released from clamping. After the transfer film 124 is released from the stone plate, it can move intermittently to replace the next set of patterns to correspond with the pressure plate 131. Step h. The electrical control unit instructs the conveyor 3 to start intermittent operation again and instructs the conveying pump and electric valve on the cold liquid input pipe 25 to close. Then, it instructs the booster pump and electric valve on the hot air input pipe 26 to open. The externally supplied pressurized heating air can cause the cold liquid inside the pressure heat conduction plate 21 to drain quickly, stop cooling, and cause the temperature of the pressure heat conduction plate 21 to rise. At this time, the stone slab that has completed the heat transfer is removed from above the pressure heat conduction plate 21 of the buffer heat exchange component 2 and can be unloaded manually. Step i. Repeat steps b to h continuously. When the conveyor 3 is running intermittently, the roller feeder 5 runs intermittently, feeding and transferring materials intermittently to form a continuous operation.

[0034] The present invention provides a heat transfer body 1 with a take-up and untake-up winding component 12 and a hot press plate assembly 13 that can move up and down synchronously. The transfer film 124 of the take-up and untake-up winding component 12 can be pulled and unfolded and can move intermittently. The transfer film 124 that moves to the horizontal layout section can be attached to the lower surface of the pressure plate 131 of the hot press plate assembly 13. The buffer heat exchange component 2 is provided with a pressure-bearing heat conduction plate 21, an elastic buffer component 23 and a cold liquid input pipe 25. The pressure-bearing heat conduction plate 21 is placed below the upper half of the conveyor belt 31 of the conveyor 3 and is attached to the conveyor belt 31. The pressure plate 131 is placed above the pressure-bearing heat conduction plate 21 and the conveyor belt 31. The preheating component 4 and the pretreatment component 6 are placed at one end of the heat transfer body 1 and are respectively provided with a heat radiation plate 42 and a roller coating component 62. The preheating component 4 and the pretreatment component 6 can be used to preheat the stone slab to be printed and apply the adhesive, respectively. After the pressure plate 131 moves down to apply pressure and heat, the transfer film 124 and the stone slab can be buffered and supported by the pressure heat conduction plate 21 to achieve delayed clamping during the transfer heating. After the pressure plate 131 stops heating, it continues to maintain pressure. After cold liquid is introduced into the pressure heat conduction plate 21, heat exchange can be carried out to continuously cool the heated stone slab in the clamped state. This allows the stone slab to achieve gradient heating and heat preservation and delayed pressure holding from preheating to clamping heating. The clamping cooling is used for shaping and cooling, which can reduce the risk of deformation of the ultra-thin artificial stone slab during heat transfer. After shaping and cooling, it is easy to separate the transfer film 124 from the stone slab when the pressure plate 131 moves up, thereby improving the heat transfer effect.

[0035] The above is only one specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing the protection scope of the present invention.

Claims

1. A heat transfer printing device for printing on ultra-thin artificial stone veneers, comprising a heat transfer body (1), wherein the heat transfer body (1) is provided with a frame (11), a winding and unwinding component (12), and a hot pressing plate assembly (13), wherein a cylinder (113) is provided inside the frame (11), the winding and unwinding component (12) and the hot pressing plate assembly (13) are placed inside the frame (11) and can move up and down synchronously within the frame (11), wherein the hot pressing plate assembly (13) is provided with a pressure plate (131) and an electric heating element (132) embedded in the pressure plate (131), wherein the winding and unwinding component (122) is provided with a transfer film (124) in a wound shape, and the transfer film (124) can be pulled open and can move intermittently, wherein the transfer film (124) that is opened and intermittently moved to the lower part is horizontally arranged, and the horizontally arranged section of the transfer film (124) can be attached to the lower surface of the pressure plate (131), characterized in that: It also includes a buffer heat exchange assembly (2), a conveyor (3), a preheating assembly (4), a roller feeder (5), a pretreatment assembly (6), and an electrical control unit. The preheating assembly (4) and the pretreatment assembly (6) are respectively equipped with a heat radiation plate (42) and a roller coating component (62). The preheating assembly (4) and the pretreatment assembly (6) can preheat the artificial stone slab to be printed and apply the adhesive, respectively. The conveyor (3) includes a conveyor belt (31). The roller feeder (5) is located at the end of the conveyor (3) and the conveyor... (3) and the roller conveyor (5) can both operate intermittently. The buffer heat exchange assembly (2) is provided with a pressure-bearing heat conduction plate (21), a support plate (22), an elastic buffer (23), a pressure sensor (24), a cold liquid inlet pipe (25), a hot gas inlet pipe (26), and an outlet pipe (27). The pressure-bearing heat conduction plate (21) is provided with a serpentine hole (211). The elastic buffer (23) is placed below the pressure-bearing heat conduction plate (21), and the support plate (22) is placed below the elastic buffer (23). The elastic buffer (23) consists of several components. The pressure sensor (24) is embedded in the upper part of the pressure-bearing heat conduction plate (21). The cold liquid inlet pipe (25) is connected to one end of the serpentine hole (211) of the pressure-bearing heat conduction plate (21), and the other end of the serpentine hole (211) is connected to the outlet pipe (27). One end of the hot gas inlet pipe (26) is connected to one end of the serpentine hole (211). An electric valve and a delivery pump are provided on the cold liquid inlet pipe (25), and an electric valve and a booster pump are provided on the hot gas inlet pipe (26). The heat transfer body (1) and the buffer heat exchange assembly (2) are respectively placed above and below the upper half of the conveyor belt (31) of the conveyor (3), and the pressure plate (131) of the heat transfer body (1) corresponds to the pressure-bearing heat conduction plate (21) of the buffer heat exchange assembly (2). The heat transfer body (1), the buffer heat exchange assembly (2), the conveyor (3), the preheating assembly (4), and the roller feeder (5) are all electrically connected to the electrical control unit. The method of using the heat transfer device for printing ultra-thin artificial stone veneer includes the following steps: Step a. The transfer film (124) is attached to the heat transfer body (1); Step b. Loading: The stone slab to be transferred is manually placed on the roller conveyor (5); Step c. The electrical control unit instructs the roller feeder (5) and the conveyor (3) to start running, and instructs the heat radiation plate (42) of the preheating component (4) to open. The stone slab placed on the roller feeder (5) moves and is pre-treated by the pretreatment component (6). The stone slab is then sent to the intermittently running conveyor belt (31) and enters the preheating component (4) to pause and preheat. Step d. The preheated slab is conveyed by the intermittently running conveyor belt (31) to a stop below the heat transfer body (1); Step e. The electronic control unit instructs the heat transfer body (1) to operate and start heating, driving the hot press plate assembly (13) to press down and heat, and delay heat preservation and pressure maintenance; Step f. The electrical control unit instructs the heat press plate assembly (13) of the heat transfer body (1) to stop heating, and instructs the delivery pump and electric valve on the cold liquid input pipe (25) of the buffer heat exchange assembly (2) to open, and the externally supplied cold liquid cools down the pressure heat conduction plate (21) and the stone slab above it. Step g. The electronic control unit instructs the hot press assembly (13) to stop holding pressure and instructs the heat transfer body (1) to rise and the transfer film (124) to move intermittently; Step h. The electrical control unit instructs the conveyor (3) to start intermittent operation again and instructs the conveying pump and electric valve on the cold liquid input pipe (25) to close, and then instructs the booster pump and electric valve on the hot gas input pipe (26) to open, so that the pressure heat conduction plate (21) stops cooling and the temperature rises, and the stone slab that has completed heat transfer is removed. Step i. Repeat steps b through h.

2. The heat transfer printing device for printing ultra-thin artificial stone veneer according to claim 1, characterized in that: The conveyor (3) is a belt conveyor that can operate intermittently. The heat transfer body (1) and the buffer heat exchange component (2) are both placed in the middle section of the conveyor (3) and the pressure heat conduction plate (21) of the buffer heat exchange component (2) is in contact with the back of the upper half of the conveyor belt (31). The preheated and pretreated stone slab can be transported by the conveyor belt (31) to the bottom of the heat transfer body (1). The conveyor belt (31) has several guide blocks (311) evenly distributed on both sides of its working surface. The guide blocks (311) on both sides are arranged in a figure-eight shape.

3. The heat transfer printing device for printing ultra-thin artificial stone veneer according to claim 2, characterized in that: The preheating component (4) is also provided with a protective cover (41), the heat radiation plate (42) is placed inside the protective cover (41), and the preheating component (4) is placed above the conveyor (3).

4. The heat transfer printing device for printing ultra-thin artificial stone veneer according to claim 3, characterized in that: The pretreatment component (6) is also provided with a cleaning shovel (61), an elastic clamping connector (63) and a bracket (64). The elastic clamping connector (63) is provided in two sets, and each set of elastic clamping connectors (63) is provided with two pairs of elastic sliding connection pairs. The cleaning shovel (61) and the roller coating component (62) are each slidably connected to the bracket (64) by a set of elastic clamping connectors (63). The cleaning shovel (61) can elastically abut against the surface of the stone slab to be pretreated. The roller coating component (62) is provided with a hanger (621) and a roller brush (622). The roller brush (622) is rotatably connected to the bottom of the hanger (621). The roller brush (622) can elastically abut against the surface of the stone slab.

5. The heat transfer printing device for printing ultra-thin artificial stone veneer according to claim 4, characterized in that: The roller conveyor (5) is provided with a roller frame, roller body (51) and positioning baffle (52). The roller body (51) consists of several pieces, which are rotatably connected to the roller frame. The roller conveyor (5) can move intermittently according to the rhythm and can drive the stone slab forward. The two ends of the roller body (51) are provided with limiting shoulders. The positioning baffle (52) is connected to one end of the roller frame. The pretreatment component (6) is placed above the roller conveyor (5).

6. The heat transfer printing device for printing ultra-thin artificial stone veneer according to claim 5, characterized in that: The roller feeder (5) can transfer the stone slabs onto the conveyor belt (31) of the conveyor (3). The rhythm of the intermittent movement of the roller feeder (5) driving the stone slabs to move is consistent with the rhythm of the intermittent movement of the stone slabs driven by the conveyor (3).

7. The heat transfer printing device for printing ultra-thin artificial stone veneer according to claim 6, characterized in that: It also includes a pneumatic control unit, which is electrically connected to an electrical control unit. The cylinder (113) is connected to the pneumatic control unit. The electrical control unit can command the roller feeder (5) and the conveyor (3) to operate and command the preheating component (4) to start and stop preheating. The electrical control unit can command the heat transfer body (1) to operate and start and stop heating. The electrical control unit can command the conveying pump and electric valve on the cold liquid input pipe (25) of the buffer heat exchange component (2) to operate. The electrical control unit can command the booster pump and electric valve on the hot air input pipe (26) to operate.

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