Paperless graphic circulation industrial heat pump temperature control printing system and printing method thereof

Abstract

The present invention relates to a paperless graphic circulation industrial heat pump temperature control printing system and a printing method thereof. In order to fill the gap in the prior art, the paperless graphic circulation industrial heat pump temperature control printing system includes a flatbed inkjet printer, which includes a workbench, a movable crossbeam, a printing inkjet system, a program control circuit and a touch screen, and is characterized in that: it also includes a heat pump temperature control device, and a temperature sensor is also provided on one side of the independent nozzle, and the temperature sensor and the heat pump temperature control device are both electrically connected to the program control circuit. Under the control of the program control circuit, the heat pump temperature control device can control the peripheral temperature of the red, yellow, blue and black four-color ink cartridges and their ink delivery pipes within the range of 18-25°C. The present invention also relates to a corresponding printing method. The present invention can accurately perform flatbed inkjet printing and can print various planes. It is an ideal update and replacement product for existing UV flatbed printers.

Description

Technical Field

[0001] The invention relates to a paperless graphic and text circulation industrial heat pump temperature control printing system and a printing method thereof. Background Art

[0002] Flatbed printing refers to a production process that uses a universal printer or a flatbed printer to print images on hard media. Currently, most flatbed printers on the market are UV inkjet printers. Existing UV inkjet printers mostly use strong ultraviolet rays or strong light to cure the ink. When the light source is working, local heat is severe. The area around the ink nozzle on the mobile trolley is easily affected by the ambient temperature, resulting in unstable ink output.

[0003] Moreover, UV inkjet printing is mainly suitable for 3D printing, which requires a large amount of inkjet and often requires multiple layers of inkjet. If each layer of ink is sprayed and then light-cured, the inner layer of ink will not be fully cured due to insufficient light exposure, affecting color fastness and wear resistance. Existing UV inkjet printing is done while inkjet is being cured, which causes each layer of ink to be cured without being fully fused. This is the main reason why the color of flat graphics printed by existing UV inkjet printers is dark. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to fill the above-mentioned gap in the prior art and provide a colorful and clear paperless graphic circulation industrial heat pump temperature control printing system and a printing method thereof.

[0005] In order to solve the above technical problems, the paperless graphic circulation industrial heat pump temperature control printing system includes a flatbed inkjet printer, which includes a workbench, a movable beam, a printing inkjet system, a program control circuit and a touch screen. The workbench is provided with longitudinal guide rails on both sides, and the two ends of the movable beam are arranged on the longitudinal guide rails and provided with a longitudinal drive motor. The movable beam is provided with a transverse guide rail, and a moving trolley is provided on the transverse guide rail. The moving trolley is equipped with a transverse drive motor. The printing inkjet system includes red, yellow, blue and black four-color ink warehouses and red, yellow, blue and black four-color ink cartridges. The four-color ink warehouses correspond to the four-color ink cartridges one by one and are connected through ink delivery tubes. The touch screen, the longitudinal drive motor, the transverse drive motor and the printing inkjet system are all connected to the program control circuit and controlled by the program control circuit. The characteristics are as follows:

[0006] It also includes a heat pump temperature control device. A temperature sensor is also provided on one side of the red, yellow, blue and black ink cartridges. The temperature sensor and the heat pump temperature control device are both electrically connected to the program control circuit. Under the control of the program control circuit, the heat pump temperature control device can control the surrounding temperature of the red, yellow, blue and black ink cartridges and their ink delivery tubes within the range of 18-25°C.

[0007] A housing is provided on the mobile trolley, and the red, yellow, blue and black four-color ink cartridges are arranged in the housing. Two copper or aluminum heat dissipation square tubes are provided in the housing. The two heat dissipation square tubes clamp the red, yellow, blue and black four-color ink cartridges from the front and rear ends respectively. The front and rear ends of each color ink cartridge are in close contact with the adjacent heat dissipation square tubes respectively. One end of the two heat dissipation square tubes passes through the side wall of the housing and communicates with the atmosphere. The other end of the two heat dissipation square tubes passes through the side wall of the housing and communicates with an air intake hose.

[0008] The heat pump temperature control device includes a refrigerant compressor, a condenser, an evaporator, and a throttle valve. The above components are connected in series through metal pipes to form a heat pump system. The evaporator is arranged in a bellows. The side walls on both sides of the bellows are respectively provided with an air inlet and an air outlet. A fan is provided in the air inlet. The air outlet is in a conical tube shape and is connected to the other end of the air intake hose. The inner wall surface of the heat dissipation square tube is provided with heat dissipation fins.

[0009] With such a design, no matter how the ambient temperature changes, the heat pump temperature control device of the present invention can control the ambient temperature of the red, yellow, blue and black four-color ink cartridges and their ink delivery tubes within the range of 18-25°C, so that the four-color ink nozzles of the flatbed inkjet printer always operate within the appropriate temperature range.

[0010] As an optimization, the red, yellow, blue and black four-color ink reservoirs / ink cartridges are respectively red, yellow, blue and black four-color composite ink reservoirs / ink cartridges, wherein:

[0011] The red composite ink tank / cartridge includes a light-curable red ink tank / cartridge and a heat-curable red ink tank / cartridge, each of which contains light-curable red ink and heat-curable red ink, and each is equipped with an independent nozzle;

[0012] The yellow composite ink tank / ink cartridge includes a light-curable yellow ink tank / ink cartridge and a heat-curable yellow ink tank / ink cartridge, each of which contains light-curable yellow ink and heat-curable yellow ink, and each is equipped with an independent nozzle;

[0013] The blue composite ink tank / ink cartridge includes a light-curing blue ink tank / ink cartridge and a heat-curing blue ink tank / ink cartridge, each of which contains light-curing blue ink and heat-curing blue ink, and each is equipped with an independent nozzle;

[0014] The black composite ink tank / ink cartridge includes a photocurable black ink tank / ink cartridge and a thermal curable black ink tank / ink cartridge, which respectively store photocurable black ink and thermal curable black ink and are respectively equipped with independent nozzles.

[0015] The above-mentioned independent nozzles are connected to the program control circuit by independent data lines and are independently controlled. A light sensor and a light curing auxiliary light source are also arranged on one side of the independent nozzle, and the program control circuit is equipped with a memory.

[0016] The memory stores a plurality of light curing parameters M, which are all non-negative numbers less than or equal to 1, respectively for a plurality of to-be-printed objects with different surface materials. Under the control of the program control circuit, before printing the image and text, the paperless image and text cycle industrial heat pump temperature control printing system first displays a light curing parameter M recommendation table for a plurality of to-be-printed objects with different surface materials on the touch screen, prompting the staff to select or set the light curing parameter M.

[0017] When printing images and texts, the paperless image and text circulation industrial heat pump temperature control printing system uses the threshold value N of the four-color ink of the image point to be printed on the image and text to be printed, which is input from the outside and multiplied by the preset or pre-selected light curing parameter M, as the threshold value of the light curing ink of the corresponding color of the image point after rounding, and uses the value obtained by NN×M, after rounding, as the threshold value of the heat curing ink of the corresponding color of the image point for printing. In this design, the red, yellow, blue, and black four-color ink tanks / ink cartridges are respectively equipped with light curing ink and heat curing ink, and the ink is sprayed alternately. The two inks are fully mixed, and the colors are bright and realistic. Natural light or daily lighting light source and room temperature are used for light curing and heat curing respectively, and the curing speed is moderate, the curing is sufficient, and the color fastness is high.

[0018] As an optimization, the heat pump temperature control device also includes an auxiliary electric heating device. With such a design, when the heat pump temperature control device is needed for heating, only the auxiliary electric heating device and the corresponding blower on the wind box and the air supply hose can be turned on to quickly guide the hot air into the heat dissipation square tube to heat the red, yellow, blue and black four-color ink cartridges and the corresponding nozzles.

[0019] As an optimization, one end of the heat dissipation square tube connected to the atmosphere is connected to a preheating tube, and is connected to the atmosphere through the preheating tube. The ink delivery tube passes through the preheating tube and the heat dissipation square tube, enters the shell, and then passes through a side wall of the heat dissipation square tube and enters the corresponding ink cartridges. With this design, the exhaust gas discharged by the heat dissipation square tube can be used to preheat or pre-cool the ink delivery tube.

[0020] As an optimization, the red, yellow, blue and black four-color photocurable ink reservoirs, red, yellow, blue and black four-color photocurable ink cartridges and the ink delivery tubes therebetween are all made of light-shielding materials. With such a design, the photocurable ink is not easy to deteriorate.

[0021] The method of the present invention for printing waterproof, wear-resistant and aging-resistant graphics and texts on a flat surface of an object by using the aforementioned paperless graphics and text circulation industrial heat pump temperature control printing system comprises the following steps:

[0022] ①. Turn on the power, move the moving beam and the moving trolley to the initial position, and place the object to be printed on the workbench;

[0023] ②. The touch screen displays the recommended table of light curing parameters M, prompting you to select or set the light curing parameters M. The staff selects or sets the light curing parameters M according to the surface material of the object to be printed.

[0024] ④. Start the paperless graphic circulation industrial heat pump temperature control printing system. Under the control of the program control circuit, when the paperless graphic circulation industrial heat pump temperature control printing system prints graphics, the threshold value N of the four-color ink of the image point to be printed on the external input image to be printed is multiplied by the preset or pre-selected light curing parameter M by N×M, which is rounded off as the threshold value of the light curing ink of the corresponding color of the image point, and the value obtained by NN×M is rounded off as the threshold value of the heat curing ink of the corresponding color of the image point for printing. With this design, the appropriate light curing parameter M can be set according to the surface characteristics of different substrates, and the appropriate light curing ink and heat curing ink can be used for flatbed printing to achieve the best printing effect.

[0025] As an optimization, when the surface to be printed is a primer surface sprayed on stainless steel, aluminum alloy or other metals, M is 0.4 to 0.5;

[0026] When the surface to be printed is the attached bottom surface sprayed on glass, ceramic or acrylic surface, M is 0.34-0.36;

[0027] When the surface to be printed is a PVC surface, including PVC board and KT board, M is 0.3 to 0.32;

[0028] When the surface to be printed is a primer layer sprayed on a gypsum board or wall or lime or cement wall, M is 0.35;

[0029] When the surface to be printed is a water-based paint coating sprayed on wood, fabric or leather, M is set to 0.2. With such a design, practice has proved that the above light curing parameters have the highest effect.

[0030] As an optimization, if the surface to be printed is a chestnut wood surface, when printing black and red ink, use N 红 ×M×80% is rounded off to the nearest integer and used as the threshold value for red light-curable ink. 红 -N 红 × M) 80% is rounded off and used as the threshold value for red heat-curable ink;

[0031] N 黑 ×M×80% is rounded off to the nearest integer and used as the threshold value of black photocurable ink. 黑 -N 黑 × M) 80% is rounded off and used as the threshold value for black thermal curing ink;

[0032] If the surface to be printed is a yellow wooden surface, when printing yellow ink, use N 黄 The result obtained by rounding off is used as the threshold value of yellow light-curable ink, and (N 黄 -N 黄 The result obtained by rounding off from 80% is used as the threshold value for yellow thermal curing ink.

[0033] If the surface to be printed is a white or light-colored wooden surface, when printing red, yellow, blue, and black inks, the result obtained by N×M is rounded off as the threshold of the corresponding color light-curing ink, and the result obtained by NN×M is rounded off as the threshold of the corresponding color heat-curing ink for printing. This design can utilize the original grain color of the wood, reduce the impact of the original grain color on the printed image, and reduce ink consumption, saving the environment.

[0034] The paperless graphic circulation industrial heat pump temperature control printing system and the printing method thereof can accurately control the inkjet printing temperature, can accurately perform flatbed inkjet printing, can print various flat surfaces, and are ideal update and replacement products and technologies for existing UV flatbed printers. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The paperless graphic circulation industrial heat pump temperature control printing system and printing method thereof of the present invention are further described below in conjunction with the accompanying drawings:

[0036] Figure 1 This is a structural diagram of the paperless graphic cycle industrial heat pump temperature control printing system;

[0037] Figure 2 The present invention is a schematic diagram of the structure of a mobile carriage of a paperless graphic circulation industrial heat pump temperature control printing system and its red, yellow, blue and black four-color composite ink cartridges.

[0038] In the figure: 1 is the mobile car, 2 is the red, yellow, blue and black ink tanks:

[0039] 21 is a light-curing red ink tank, 21 / 22 is the heat curing red ink tank, 23 is the light curing yellow ink tank, 24 / 23 is the thermal curing yellow ink tank, 24 is the light curing blue ink tank, 23 / 24 is the thermal curing blue ink tank, 24 is the light curing black ink tank, / This is a heat curing black ink tank.

[0040] 3 are red, yellow, blue and black ink cartridges:

[0041] 31 is a light-curable red ink cartridge, 31 / 32 is a heat-curing red ink cartridge, 32 is a light-curing yellow ink cartridge, / 33 is a heat-curing yellow ink cartridge, 33 is a light-curing blue ink cartridge, / 34 is a heat-curing blue ink cartridge, 34 is a light-curing black ink cartridge, / It is a heat curing black ink cartridge;

[0042] 4 is an ink delivery tube, 5 is a heat dissipation square tube, 6 is an air intake hose, 7 is a refrigerant compressor, 8 is a condenser, 9 is an evaporator, 10 is a throttle valve, 11 is a bellows, 12 and 13 are fans, 14 is an auxiliary electric heating device, and 15 is a preheating tube.

[0043] A is the outlet refrigeration valve of the refrigerant compressor, A / A is the outlet heating valve of the refrigerant compressor; B is the inlet cooling valve of the refrigerant compressor, / It is the heating valve at the inlet of the refrigerant compressor. DETAILED DESCRIPTION

[0044] Implementation method 1: Figure 1 As shown, the paperless graphic circulation industrial heat pump temperature control printing system includes a flatbed inkjet printer, which includes a workbench (not shown in the figure), a moving beam (not shown in the figure), a printing inkjet system, a program control circuit (not shown in the figure) and a touch screen (not shown in the figure). The workbench is provided with longitudinal guide rails (not shown in the figure) on both sides, and the two ends of the moving beam are arranged on the longitudinal guide rails and are provided with a longitudinal drive motor (not shown in the figure). The moving beam is provided with a transverse guide rail, and a moving trolley 1 is provided on the transverse guide rail. The moving trolley 1 is equipped with a transverse drive motor. The printing inkjet system includes red, yellow, blue and black four-color ink tanks 2 and red, yellow, The blue and black four-color ink cartridges 3, the four-color ink reservoirs 2 correspond to the four-color ink cartridges 3 one by one, and are connected through the ink delivery tube 4. The touch screen, the longitudinal drive motor, the transverse drive motor and the printing inkjet system are all connected to the program control circuit and controlled by the program control circuit. It is characterized in that: it also includes a heat pump temperature control device, and a temperature sensor (not shown in the figure) is also provided on one side of the red, yellow, blue and black four-color ink cartridges 3. The temperature sensor and the heat pump temperature control device are both electrically connected to the program control circuit and controlled by the program control circuit. The heat pump temperature control device can control the ambient temperature of the red, yellow, blue and black four-color ink cartridges and their ink delivery tubes within the range of 18-25°C.

[0045] A housing is provided on the mobile vehicle 1, and the red, yellow, blue and black four-color ink cartridges 3 are arranged in the housing. Two copper or aluminum heat dissipation square tubes 5 are provided in the housing. The two heat dissipation square tubes 5 clamp the red, yellow, blue and black four-color ink cartridges 3 from the front and rear ends respectively. The front and rear ends of the ink cartridges of each color are in close contact with the adjacent heat dissipation square tubes 5 respectively. One end of the two heat dissipation square tubes 5 passes through the side wall of the housing and communicates with the atmosphere. The other end of the two heat dissipation square tubes 5 passes through the side wall of the housing and communicates with an air intake hose 6.

[0046] The heat pump temperature control device includes a refrigerant compressor 7, a condenser 8, an evaporator 9, and a throttle valve 10. The above components are connected in series through metal pipes to form a heat pump system. The evaporator 9 is arranged in a wind box 11. The side walls of the wind box 11 are respectively provided with an air inlet and an air outlet. A fan 12 is arranged in the air inlet. The air outlet is in a cone shape and communicates with the other end of the air intake hose 6. The inner wall surface of the heat dissipation square tube 5 is provided with heat dissipation fins. The condenser 8 is also equipped with a fan 13. The heat pump temperature control device also includes an auxiliary electric heating device 14.

[0047] Refrigerant compressor 7 is equipped with refrigerant compressor outlet cooling valve A and refrigerant compressor outlet heating valve A / , refrigerant compressor inlet cooling valve B and refrigerant compressor inlet heating valve B / .

[0048] The inlet of the refrigerant compressor outlet refrigeration valve A is connected to the outlet of the refrigerant compressor 7, the outlet of the refrigerant compressor outlet refrigeration valve A is connected to the adjacent end of the condenser 8, the inlet of the refrigerant compressor inlet refrigeration valve B is connected to the inlet of the refrigerant compressor 7, and the outlet of the refrigerant compressor outlet refrigeration valve B is connected to the adjacent end of the evaporator 9.

[0049] Refrigerant compressor outlet heating valve A / The inlet is connected to the outlet of the refrigerant compressor 7, and the refrigerant compressor outlet heating valve A / The outlet is connected to the adjacent end of the evaporator 9, and the refrigerant compressor outlet heating valve B / The inlet of the refrigerant compressor is connected to the inlet of the refrigerant compressor 7, and the outlet of the refrigerant compressor is connected to the heating valve B / The outlet is connected to the adjacent end of the condenser 8 , and the other end of the condenser 8 and the other end of the evaporator 9 are connected to the throttle valve 10 .

[0050] The refrigerant compressor outlet refrigeration valve A and the refrigerant compressor outlet refrigeration valve B are linked, opened and closed at the same time, and the refrigerant compressor outlet heating valve A / And refrigerant compressor outlet heating valve B / , open at the same time, close at the same time.

[0051] Refrigerant compressor outlet cooling valve A and refrigerant compressor outlet heating valve A / Reverse linkage, when one valve is opened, the other valve must be closed.

[0052] When the red, yellow, blue and black ink cartridges 3 need to be cooled, the refrigerant compressor outlet refrigeration valve A and the refrigerant compressor outlet refrigeration valve B are opened, and the refrigerant compressor outlet heating valve A / And refrigerant compressor outlet heating valve B / Close. The refrigerant compressor 7 is running. At this time, the refrigerant Figure 1The circuit shown runs counterclockwise, the heat pump temperature control device absorbs heat from the vicinity of the evaporator 9, and the fan 12 sends the cold air generated by the evaporator 9 to the vicinity of the red, yellow, blue and black ink cartridges 3 to cool them down.

[0053] When the red, yellow, blue and black ink cartridges 3 need to be heated, the refrigerant compressor outlet refrigeration valve A and the refrigerant compressor outlet refrigeration valve B are closed, and the refrigerant compressor outlet heating valve A / And refrigerant compressor outlet heating valve B / Open. The refrigerant compressor 7 is running. At this time, the refrigerant Figure 1 The circuit shown runs clockwise, and the heat pump temperature control device inputs heat to the surroundings through the evaporator 9. The fan 12 sends the hot air generated by the evaporator 9 to the surroundings of the red, yellow, blue and black four-color ink cartridges 3 to increase their temperatures.

[0054] Note: At this time, the refrigerant condenses in the evaporator 9 to release heat, and evaporates in the condenser 8 to absorb heat. The evaporator 9 and the condenser 8 are only named for the refrigeration state of the heat pump temperature control device.

[0055] With this design, the same heat pump system can be used for both heating and cooling, with easy control and switching.

[0056] One end of the heat dissipation square tube 5 connected to the atmosphere is connected to a preheating tube 15, and is connected to the atmosphere through the preheating tube 15. The ink supply tube 4 passes through the preheating tube 15 and the heat dissipation square tube 5, enters the shell, and then passes through a side wall of the heat dissipation square tube 5 and enters the corresponding ink cartridges.

[0057] like Figure 1 As shown, the red, yellow, blue and black ink reservoirs 2 are respectively red, yellow, blue and black composite ink reservoirs, wherein the red composite ink reservoir includes a light-curable red ink reservoir 21 and a heat-curable red ink reservoir 21. / , which contain light-curing red ink and heat-curing red ink respectively;

[0058] The yellow composite ink tank includes a light-curing yellow ink tank 22 and a heat-curing yellow ink tank 22 / , which contain light-curing yellow ink and heat-curing yellow ink respectively;

[0059] The blue composite ink tank includes a light-curing blue ink tank 23 and a heat-curing blue ink tank 23. / , which contain light-curing blue ink and heat-curing blue ink respectively;

[0060] The black composite ink tank includes a light-curable black ink tank 24 and a thermal-curable black ink tank 24. / , which contain photocurable black ink and thermal curable black ink respectively.

[0061] like Figure 2As shown, the red, yellow, blue and black ink cartridges 3 are respectively red, yellow, blue and black composite ink cartridges, wherein the red composite ink cartridge includes a light-curing red ink cartridge 31 and a heat-curing red ink cartridge 31. / , which contains light-curing red ink and heat-curing red ink, and is equipped with independent nozzles;

[0062] The yellow composite ink cartridge includes a light-curing yellow ink cartridge 32 and a heat-curing yellow ink cartridge 32 / , which contain light-curing yellow ink and heat-curing yellow ink, and are equipped with independent nozzles respectively;

[0063] The blue composite ink cartridge includes a light-curing blue ink cartridge 33 and a heat-curing blue ink cartridge 33 / , which contain light-curing blue ink and heat-curing blue ink, and are equipped with independent nozzles respectively;

[0064] The black composite ink cartridge includes a light-curing black ink cartridge 34 and a heat-curing black ink cartridge 34. / , which contains photocurable black ink and thermal curable black ink, and is equipped with an independent nozzle.

[0065] The red, yellow, blue and black four-color photocurable ink reservoirs 21 - 24 , the red, yellow, blue and black four-color photocurable ink cartridges 31 - 34 and the ink delivery tubes 4 therebetween are all made of light-shielding materials.

[0066] The above-mentioned independent nozzles are connected to the program control circuit by independent data lines and are independently controlled. A light sensor and a light curing auxiliary light source are also arranged on one side of the independent nozzle, and the program control circuit is equipped with a memory.

[0067] The memory stores a plurality of light-curing parameters M, which are all non-negative numbers less than or equal to 1, respectively for a plurality of to-be-printed objects with different surface materials. Under the control of the program control circuit, before printing the image and text, the paperless image and text circulation industrial heat pump temperature control printing system first displays a recommended table of light-curing parameters M for a plurality of to-be-printed objects with different surface materials on the touch screen, prompting the staff to select or set the light-curing parameters M.

[0068] When printing images and texts, the paperless image and text circulating industrial heat pump temperature control printing system uses the product of the threshold value N of the four-color ink of the image point to be printed on the image and text to be printed input from the outside and the preset or preselected light curing parameter M, and rounds it off as the threshold value of the light curing ink of the corresponding color of the image point, and uses the value obtained by NN×M, after rounding off, as the threshold value of the heat curing ink of the corresponding color of the image point for printing.

[0069] The method of the present invention for printing waterproof, wear-resistant and aging-resistant graphics and texts on a flat surface of an object by using the aforementioned paperless graphics and text circulation industrial heat pump temperature control printing system comprises the following steps:

[0070] ①. Turn on the power, move the moving beam and the moving trolley 1 to the initial position, and place the object to be printed on the workbench;

[0071] ②. The touch screen displays the recommended table of light curing parameters M, prompting you to select or set the light curing parameters M. The staff selects or sets the light curing parameters M according to the surface material of the object to be printed.

[0072] ④. Start the paperless graphic circulation industrial heat pump temperature control printing system. Under the control of the program control circuit, when the paperless graphic circulation industrial heat pump temperature control printing system prints graphics, the threshold value N of the four-color ink of the image point to be printed on the image to be printed input from the outside and the preset or preselected light curing parameter M are multiplied by N×M, and the value obtained by rounding NN×M is used as the threshold value of the heat curing ink of the corresponding color of the image point for printing.

[0073] When the surface to be printed is a primer surface sprayed on stainless steel, aluminum alloy or other metals, M is 0.4 to 0.5;

[0074] When the surface to be printed is the attached bottom surface sprayed on glass, ceramic or acrylic surface, M is 0.34-0.36;

[0075] When the surface to be printed is a PVC surface, including PVC board and KT board, M is 0.3 to 0.32;

[0076] When the surface to be printed is a primer layer sprayed on a gypsum board or wall or lime or cement wall, M is 0.35;

[0077] When the surface to be printed is a water-based paint coating sprayed on wood, fabric or leather, M is set to 0.2.

[0078] If the surface to be printed is a chestnut wood surface, when printing black or red ink, use N 红 ×M×80% is rounded off to the nearest integer and used as the threshold value for red light-curable ink. 红 -N 红 × M) 80% is rounded off and used as the threshold value for red heat-curable ink;

[0079] N 黑 ×M×80% is rounded off to the nearest integer and used as the threshold value of black photocurable ink. 黑 -N 黑 × M) 80% is rounded off and used as the threshold value for black thermal curing ink;

[0080] If the surface to be printed is a yellow wooden surface, when printing yellow ink, use N 黄The result obtained by rounding off is used as the threshold value of yellow light-curable ink, and (N 黄 -N 黄 The result obtained by rounding off from 80% is used as the threshold value for yellow thermal curing ink.

[0081] If the surface to be printed is a white or light-colored wooden surface, when printing red, yellow, blue, and black inks, the result obtained by N×M is rounded off as the threshold of the corresponding color light-curable ink, and the result obtained by NN×M is rounded off as the threshold of the corresponding color heat-curable ink for printing.

Claims

1. A paperless graphic circulation industrial heat pump temperature control printing system, including a flatbed inkjet printer, the flatbed inkjet printer includes a workbench, a movable beam, a printing inkjet system, a program control circuit and a touch screen, longitudinal guide rails are arranged on both sides of the workbench, the two ends of the movable beam are arranged on the longitudinal guide rails, and a longitudinal drive motor is arranged, the movable beam is provided with a transverse guide rail, a movable trolley is arranged on the transverse guide rail, and the movable trolley is equipped with a transverse drive motor, the printing inkjet system includes red, yellow, blue, and black four-color ink warehouses and red, yellow, blue, and black four-color ink cartridges, the four-color ink warehouses correspond to the four-color ink cartridges one by one, and are connected through ink delivery tubes, the touch screen, the longitudinal drive motor, the transverse drive motor and the printing inkjet system are all connected to the program control circuit and controlled by the program control circuit, characterized in that: It also includes a heat pump temperature control device. A temperature sensor is also provided on one side of the red, yellow, blue and black ink cartridges. The temperature sensor and the heat pump temperature control device are both electrically connected to the program control circuit. Under the control of the program control circuit, the heat pump temperature control device can control the surrounding temperature of the red, yellow, blue and black ink cartridges and their ink delivery tubes within the range of 18-25°C. A housing is provided on the mobile trolley, and the red, yellow, blue and black four-color ink cartridges are arranged in the housing. Two copper or aluminum heat dissipation square tubes are provided in the housing. The two heat dissipation square tubes clamp the red, yellow, blue and black four-color ink cartridges from the front and rear ends respectively. The front and rear ends of each color ink cartridge are in close contact with the adjacent heat dissipation square tubes respectively. One end of the two heat dissipation square tubes passes through the side wall of the housing and communicates with the atmosphere. The other end of the two heat dissipation square tubes passes through the side wall of the housing and communicates with an air intake hose. The heat pump temperature control device comprises a refrigerant compressor, a condenser, an evaporator, and a throttle valve. The above components are connected in series through metal pipes to form a heat pump system. The evaporator is arranged in a bellows. The side walls of the bellows are respectively provided with an air inlet and an air outlet. A fan is arranged in the air inlet. The air outlet is in a cone shape and communicates with the other end of the air intake hose. The inner wall surface of the heat dissipation square tube is provided with heat dissipation fins. The red, yellow, blue and black four-color ink tanks / ink cartridges are respectively red, yellow, blue and black four-color composite ink tanks / ink cartridges, wherein: The red composite ink tank / cartridge includes a light-curable red ink tank / cartridge and a heat-curable red ink tank / cartridge, each of which contains light-curable red ink and heat-curable red ink, and each is equipped with an independent nozzle; The yellow composite ink tank / ink cartridge includes a light-curable yellow ink tank / ink cartridge and a heat-curable yellow ink tank / ink cartridge, each of which contains light-curable yellow ink and heat-curable yellow ink, and each is equipped with an independent nozzle; The blue composite ink tank / ink cartridge includes a light-curing blue ink tank / ink cartridge and a heat-curing blue ink tank / ink cartridge, each of which contains light-curing blue ink and heat-curing blue ink, and each is equipped with an independent nozzle; The black composite ink tank / cartridge includes a light-curable black ink tank / cartridge and a heat-curable black ink tank / cartridge, each of which contains light-curable black ink and heat-curable black ink, and is equipped with an independent nozzle. The above-mentioned independent nozzles are connected to the program control circuit by independent data lines and are independently controlled. A light sensor and a light curing auxiliary light source are also provided on one side of the independent nozzle. The program control circuit is equipped with a memory. The memory stores a plurality of light curing parameters M, which are all non-negative numbers less than or equal to 1, respectively for a plurality of to-be-printed objects with different surface materials. Under the control of the program control circuit, before printing the image and text, the paperless image and text cycle industrial heat pump temperature control printing system first displays a light curing parameter M recommendation table for a plurality of to-be-printed objects with different surface materials on the touch screen, prompting the staff to select or set the light curing parameter M. When printing images and texts, the paperless image and text circulation industrial heat pump temperature control printing system uses the product of the threshold value N of the four-color ink of the image point to be printed on the image and text to be printed input from the outside and the preset or preselected light curing parameter M, which is rounded off as the threshold value of the light curing ink of the corresponding color of the image point, and the value obtained by rounding off NN×M is used as the threshold value of the heat curing ink of the corresponding color of the image point for printing. The heat pump temperature control device also includes an auxiliary electric heating device. The end of the heat dissipation square tube connected to the atmosphere is commonly connected to a preheating tube, and is connected to the atmosphere through the preheating tube. The ink delivery tube passes through the preheating tube and the heat dissipation square tube and enters the shell, and then passes through a side wall of a heat dissipation square tube and respectively enters the corresponding ink cartridges. The red, yellow, blue and black four-color light curing ink storage, the red, yellow, blue and black four-color light curing ink cartridges and the ink delivery tubes therebetween are all made of light-shielding materials.

2. A method for printing waterproof, wear-resistant and aging-resistant graphics and texts on a flat surface of an object using the paperless graphics and text circulation industrial heat pump temperature control printing system of claim 1, comprising the following steps: ①. Turn on the power, move the moving beam and the moving trolley to the initial position, and place the object to be printed on the workbench; ②. The touch screen displays the recommended table of light curing parameters M, prompting you to select or set the light curing parameters M. The staff selects or sets the light curing parameters M according to the surface material of the object to be printed. ④. Start the paperless graphic circulation industrial heat pump temperature control printing system. Under the control of the program control circuit, when the paperless graphic circulation industrial heat pump temperature control printing system prints graphics, the threshold value N of the four-color ink of the image point to be printed on the image to be printed is multiplied by the preset or preselected light curing parameter M by N×M, which is rounded off as the threshold value of the light curing ink of the corresponding color of the image point, and the value obtained by NN×M is rounded off as the threshold value of the heat curing ink of the corresponding color of the image point for printing. When the surface to be printed is a primer surface sprayed on stainless steel, aluminum alloy or other metals, M is 0.4 to 0.5; When the surface to be printed is the attached bottom surface sprayed on glass, ceramic or acrylic surface, M is 0.34-0.36; When the surface to be printed is a PVC surface, including PVC board and KT board, M is 0.3 to 0.32; When the surface to be printed is a primer layer sprayed on a gypsum board or wall or lime or cement wall, M is 0.35; When the surface to be printed is a water-based paint coating sprayed on wood, fabric or leather, M is 0.

2. If the surface to be printed is a chestnut wood surface, when printing black or red ink, N is used. 红 ×M×80% is rounded off to the nearest integer and used as the threshold value for red light-curable ink. 红 -N 红 × M) 80% is rounded off and used as the threshold value for red heat-curable ink; N 黑 ×M×80% is rounded off to the nearest integer and used as the threshold value of black photocurable ink. 黑 -N 黑 × M) 80% is rounded off and used as the threshold value for black thermal curing ink; If the surface to be printed is a yellow wooden surface, when printing yellow ink, use N 黄 ×M×80% is rounded off to the nearest integer and used as the threshold value for yellow light-curable ink. 黄 -N 黄 The result obtained by rounding off from 80% is used as the threshold value for yellow thermal curing ink. If the surface to be printed is a white or light-colored wooden surface, when printing red, yellow, blue, and black inks, the result obtained by N×M is rounded off as the threshold of the corresponding color light-curable ink, and the result obtained by NN×M is rounded off as the threshold of the corresponding color heat-curable ink for printing.

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