CN115488511A

CN115488511A - Inkless printing apparatus

Info

Publication number: CN115488511A
Application number: CN202110673077.5A
Authority: CN
Inventors: 何仁城
Original assignee: Shenzhen Dakeqi Technology Co ltd
Current assignee: Shenzhen Dakeqi Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-12-20
Also published as: WO2022262442A1

Abstract

The application provides a inkless printing device, including support body, bottom plate, light-passing board and laser emitter. The bottom plate is arranged at the bottom of the frame body and used for bearing paper to be printed. The light-transmitting plate is movably connected with the frame body through a first driving mechanism, and the first driving mechanism can drive the light-transmitting plate to move towards the direction of the bottom plate, so that the light-transmitting plate is attached to the bottom plate and the paper is tightly pressed. The laser emitter can emit laser and burn and carbonize the paper through the light-transmitting plate. The inkless printing device in this application can solve the problem that the laser firing formula printing apparatus among the prior art exists and appears the burning too much and print failure, paper burning easily.

Description

Inkless printing apparatus

Technical Field

The present application relates to the field of printer technology, and more particularly, to an inkless printing apparatus.

Background

The existing mainstream paper printer includes: ink jet printers, laser printers, stylus printers, thermal printers, LED printers, and the like. The existing printers need to use consumables, ink-jet printers need to consume ink cartridges and ink, laser printers and LED printers need to consume toner cartridges and carbon powder, needle printers need to consume color ribbons, and thermal printers need to consume thermal printing heads.

In the printer, part of the consumable materials can be substantially recycled, but the consumable materials can be completely replaced by the current replacement method, so that the consumable parts are wasted, for example: inkjet printers, which consume ink only, currently, the mainstream practice is to replace the ink cartridge directly; laser printers and LED printers consume only carbon powder, but the current mainstream practice is to replace the toner cartridge. Thereby causing the waste of consumables, environmental pollution and social resources.

In order to avoid the above situations, a printing apparatus that forms a carbonization mark by firing paper with laser has been developed in the prior art, and although such a printing apparatus does not need to use consumable accessories such as an ink cartridge and a toner cartridge, the problem of printing failure due to excessive firing and even the dangerous situation of burning paper occur easily.

Disclosure of Invention

The application provides an inkless printing device to solve the problem that the laser firing formula printing apparatus among the prior art exists easily the burning excessively and print failure, paper burning appear.

In order to solve the above problems, the technical scheme provided by the application is as follows: an inkless printing device comprises a frame body, a bottom plate, a light-transmitting plate and a laser emitter. The bottom plate is arranged at the bottom of the frame body and used for bearing paper to be printed. The light-transmitting plate is movably connected with the frame body through a first driving mechanism, and the first driving mechanism can drive the light-transmitting plate to move towards the direction of the bottom plate, so that the light-transmitting plate is attached to the bottom plate and the paper is tightly pressed. The laser emitter can emit laser and burn and carbonize the paper through the light-transmitting plate.

The inkless printing device in this application bears the paper through the bottom plate, and first actuating mechanism drives the light-passing board and removes, makes light-passing board and bottom plate laminating and compress tightly the paper to lack oxygen around the order paper, after the paper is fixed, send laser by laser emitter and burn the paper, because lack oxygen around the paper, consequently the paper does not burn and only can be carbonized, avoid appearing the burning excessively and print failure, the emergence of paper burning from this. Simultaneously, this application has adopted the design of inkless printing, need not use the consumptive material, consequently does not have the extravagant problem of consumptive material, and then can reduce user's printing cost, has avoided the problem that occupies social resource when consumptive material polluted environment and production consumptive material simultaneously to, because laser emitter does not directly contact the paper, avoid appearing beating among the prior art and beat printer head contact paper and produce the condition that equipment damaged, and then improved equipment life.

In a possible design, the upper surface of the bottom plate is a smooth surface structure, and the lower surface of the bottom plate is a heat dissipation structure.

In one possible design, the inkless printing apparatus further includes: a paper transport mechanism for transporting the paper.

In a possible design, paper transport mechanism includes the transfer roller, and is a plurality of the transfer roller just to set up in the upper surface both sides of bottom plate, the transfer roller with press from both sides between the bottom plate and establish the paper, can drive when the transfer roller rotates the paper for the bottom plate slides.

In one possible design, the inkless printing apparatus further includes: and the paper monitoring sensor is used for monitoring the in-place condition of the paper.

In one possible design, the inkless printing apparatus further includes: and the refrigerating mechanism is used for refrigerating the bottom plate.

In a possible design, the refrigeration mechanism is a circulating water pump, the bottom plate is of a hollow structure and is provided with a water inlet and a water outlet, and the circulating water pump is respectively communicated with the water inlet and the water outlet through a pipeline and injects circulating cooling water into the bottom plate.

In one possible embodiment, the first drive mechanism includes one of a spindle lift, a piston rod cylinder, and a piston rod hydraulic cylinder.

In a possible design mode, the laser emitter is movably connected with the frame body through a second driving mechanism, and the second driving mechanism can drive the laser emitter to move above the bottom plate; the second driving mechanism comprises a double-shaft mechanical arm or a double-shaft moving platform.

In a possible design manner, two sides of the bottom plate are provided with a step-shaped first extension part and a step-shaped second extension part; the first extension part is higher than the bottom plate and is connected with the paper box; the second extending part is lower than the bottom plate and is connected with the paper outlet.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without inventive labor.

FIG. 1 is a schematic view of an inkless printing apparatus provided by an embodiment;

FIG. 2 is a side view of an inkless printing apparatus provided by an embodiment;

fig. 3 is a schematic view of an inkless printing apparatus according to another embodiment.

FIG. 4 is a cross-sectional view of a base plate provided in one embodiment;

reference numerals: 10. a frame body; 20. a base plate; 21. a first extension portion; 22. a second extension portion; 23. a water inlet; 24. a water outlet; 30. a light-transmitting plate; 31. a first drive mechanism; 40. a laser transmitter; 41. a second drive mechanism; 50. a paper conveying mechanism; 60. a paper monitoring sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "inner," "outer," "upper," "bottom," "front," "back," and the like, when used in the orientation or positional relationship indicated in FIG. 1, are used solely for the purpose of facilitating a description of the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.

As shown in fig. 1 and fig. 2, the present application provides an inkless printing apparatus to solve the problems of over burning, printing failure and burning of paper easily occurring in the laser burning printing apparatus in the prior art.

Specifically, the technical solution provided by this embodiment is as follows: an inkless printing device comprises a frame body 10, a bottom plate 20, a light-transmitting plate 30 and a laser emitter 40. A base plate 20 is disposed at the bottom of the frame 10 for carrying paper to be printed. The transparent plate 30 is movably connected to the frame 10 through the first driving mechanism 31, and the first driving mechanism 31 can drive the transparent plate 30 to move toward the bottom plate 20, so that the transparent plate 30 is attached to the bottom plate 20 and presses the paper tightly. The laser emitter 40 can emit laser and burn and carbonize the paper through the transparent plate 30.

The transparent plate 30 is made of transparent material, and can be selected from glass or transparent plastic, and the laser can penetrate through the transparent plate 30 and irradiate the paper.

The inkless printing device in this embodiment bears the paper through bottom plate 20, and first actuating mechanism 31 drives light-passing board 30 and removes, makes light-passing board 30 and bottom plate 20 laminating and compress tightly the paper to lack oxygen around the paper, after the paper is fixed, send laser by laser emitter 40 and burn the paper, because lack oxygen around the paper, consequently the paper does not burn and only can be carbonized, avoid appearing the burning excessively and print failure, the emergence of paper burning from this. Simultaneously, this application has adopted the design of inkless printing, need not use the consumptive material, consequently there is not the extravagant problem of consumptive material, and then can reduce user's printing cost, the problem of occuping social resource when having avoided consumptive material polluted environment and production consumptive material simultaneously to, because laser emitter 40 does not directly contact the paper, avoid appearing beating the printer head among the prior art and contacting the paper and produce the condition that equipment damaged, and then improved equipment life.

It should be noted that the high-energy laser emitted by the laser emitter 40 does not ignite the paper, for the following reasons: the paper burning needs two necessary conditions, firstly, the temperature reaches the burning point, secondly, an oxidant is needed, the two points are reasonably controlled by the application, so that the paper is not easy to burn, specifically, the bottom plate 20 is made of a metal plate with excellent heat conduction, a large number of heat dissipation structures are arranged at the bottom, a refrigerating device can be arranged, such as air cooling, water cooling, air conditioning refrigeration and the like, in addition, the light transmission plate 30 and the bottom plate 20 tightly and uniformly extrude the paper to be printed in the middle, namely, the periphery of the paper can be almost considered to have no oxygen or insufficient oxygen. In summary, when the high-energy laser irradiates the surface of the paper, the heat of the irradiated part of the paper is rapidly led out by the bottom plate 20 on the back side, and in addition, oxygen is not used for assisting combustion, so that the paper cannot be burnt, and only the irradiated part is locally carbonized to form patterns and characters.

In one embodiment, the top surface of the bottom plate 20 is a smooth surface structure, and the bottom surface is a heat dissipation structure.

The upper surface of the bottom plate 20 is smooth and flat, the lower surface is uneven and heat dissipation structure, and preferably, the bottom plate 20 is made of metal material with good heat conductivity, such as copper, aluminum, iron, gold, silver, etc.

The heat dissipation structure may be a fin-shaped heat dissipation structure, a bump-type heat dissipation structure, a wave heat dissipation structure, or the like, and can increase the heat exchange area of the lower surface of the bottom plate 20, thereby improving the heat dissipation efficiency of the bottom plate 20.

In one embodiment, the inkless printing apparatus further comprises: a paper conveying mechanism 50, the paper conveying mechanism 50 is used for conveying paper.

Optionally, there are multiple ways of conveying paper, that is, there are multiple ways of conveying blank paper to be printed into the bottom plate 20 and outputting printed paper, for example: manually conveying paper, manually placing blank paper to be printed on the bottom plate 20 by a user, driving the light-transmitting plate 30 to press the paper on the bottom plate 20 by the first driving mechanism 31, driving the light-transmitting plate 30 to leave the bottom plate 20 by the first driving mechanism 31 after laser irradiation is finished, and manually removing the printed paper on the bottom plate 20 by the user; the mechanical arm with the sucker adsorbs and fixes paper through negative pressure, the mechanical arm drives the sucker to place blank paper to be printed on the bottom plate 20, the first driving mechanism 31 drives the light-transmitting plate 30 to press the paper on the bottom plate 20, after laser irradiation is completed, the first driving mechanism 31 drives the light-transmitting plate 30 to leave the bottom plate 20, and the mechanical arm drives the sucker and the printed paper to move out of the bottom plate 20.

In one embodiment, the paper conveying mechanism 50 includes conveying rollers, a plurality of conveying rollers are disposed opposite to two sides of the upper surface of the bottom plate 20, and the paper is sandwiched between the conveying rollers and the bottom plate 20, and the conveying rollers can drive the paper to slide relative to the bottom plate 20 when rotating.

Preferably, the upper surface of the bottom plate 20 is a smooth surface structure, so that the bottom plate 20 has a small friction resistance, a plurality of conveying rollers are oppositely arranged on two sides of the upper surface of the bottom plate 20, paper is sandwiched between the conveying rollers and the bottom plate 20, and when the conveying rollers rotate, the paper can be driven to slide relative to the bottom plate 20, and then the paper is fed into the bottom plate 20 or fed out of the bottom plate 20.

Wherein, the transfer roller can be through the special structural design on material lectotype or surface to improve the frictional force of transfer roller, avoid transfer roller and paper to produce the condition of relative slip, and then can drive the paper and remove.

Optionally, the material of the conveying roller may be rubber or an elastomer or other material with a relatively large friction force, the conveying roller is tightly attached to the bottom plate 20, and the conveying roller may slightly deform to fasten the paper with the bottom plate 20. The sheet is caused to slide on the upper surface of the base plate 20 as the conveying roller rotates.

Optionally, the roll surface of transfer roller can also design the structure that increases frictional force, for example, the roll surface equipartition bump of transfer roller, ripple isotructure can increase the frictional force between transfer roller and the paper, avoid transfer roller and paper to produce the condition of relative slip, and when the transfer roller rotated, drive the paper and slide on the upper surface of bottom plate 20.

In addition, the power source of the conveying roller is a motor which can be connected through a gear set or a belt to drive the conveying roller to rotate.

In one embodiment, the inkless printing apparatus further comprises: the paper monitoring sensor 60 is used for monitoring the in-place condition of the paper, and the paper monitoring sensor 60 is used for monitoring the in-place condition of the paper.

In this embodiment, in order to improve the automation level of the apparatus, the paper monitoring sensor 60 is additionally provided to monitor the in-place condition of the paper, after the paper is conveyed to the preset position of the paper monitoring sensor 60 by the paper conveying mechanism 50, the paper monitoring sensor 60 sends the monitored electric signal to the control system, at this time, the control system controls the paper conveying mechanism 50 to stop, the light-transmitting plate 30 is driven to vertically descend and uniformly extrude on the paper, and the light-transmitting plate 30 and the bottom plate 20 tightly extrude the paper in the middle.

Preferably, the paper sheet detecting sensor 60 is disposed on the upper surface of the base plate 20, and generates an electrical signal when the paper sheet passes through a set position of the paper sheet detecting sensor 60, so as to locate the exact position of the paper sheet, the paper sheet detecting sensor 60 is preferably a photo sensor, and when the paper sheet is fed to the set position of the paper sheet detecting sensor 60 by the paper sheet conveying mechanism 50, the paper sheet shields or reflects the light path of the photo sensor, so as to generate an electrical signal, which indicates that the side of the paper sheet has reached a preset position, and then controls the paper sheet conveying mechanism 50 corresponding to the side to stop conveying the paper sheet.

In one embodiment, the inkless printing apparatus further comprises: a refrigerating mechanism for refrigerating the bottom plate 20.

As mentioned above, the bottom plate 20 is made of a metal plate with excellent heat conduction, and the bottom part has a large number of heat dissipation structures, and in addition, a refrigeration mechanism, such as an air cooling device, a water cooling device, an air conditioning device, etc., can be provided to refrigerate against the lower surface of the bottom plate 20.

As shown in fig. 4, in an embodiment, the refrigeration mechanism is a circulating water pump, the bottom plate 20 is a hollow structure and is provided with a water inlet 23 and a water outlet 24, the circulating water pump is respectively communicated with the water inlet 23 and the water outlet 24 through a pipeline, and circulating cooling water is injected into the bottom plate 20.

In this embodiment, with bottom plate 20 design for hollow structure, seted up water inlet 23 and delivery port 24, water inlet 23 and delivery port 24 are connected circulating water pump, can carry out rapid cooling to bottom plate 20 through the mode of pump income recirculated cooling water, can also make bottom plate 20 keep invariable low temperature state simultaneously, make printing device can run in succession.

Optionally, cooling water is circulated in the pipeline in a closed manner, heat of the bottom plate 20 is taken away by the cooling water, and then the heat is dissipated into the air through the pipeline; or, the heat exchanger is externally connected through the pipeline, the heat of the bottom plate 20 is taken away by the cooling water and flows into the heat exchanger, and the heat is dissipated through the air by the heat exchanger.

In one embodiment, the first drive mechanism 31 comprises one of a lead screw lift, a piston rod cylinder, and a piston rod hydraulic cylinder.

In this embodiment, the first driving mechanism 31 drives the transparent plate 30 to move up and down along the vertical direction, so that the transparent plate 30 and the bottom plate 20 can be attached more tightly, the complexity requirement of the first driving mechanism 31 is reduced, and the manufacturing cost of the device is further reduced. Therefore, the first drive mechanism 31 is selected to be one of a screw lifter, a piston rod cylinder, and a piston rod hydraulic cylinder.

The screw rod lifter is a transmission element most commonly used on tool machinery and precision machinery, has the main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and has the characteristics of high precision, reversibility and high efficiency. In this embodiment, the transparent plate 30 is fixed to the nut, and the screw rod rotates to drive the nut to move up and down, thereby driving the transparent plate 30 to move up and down.

Piston rod cylinder and piston rod pneumatic cylinder drive the piston rod through atmospheric pressure or hydraulic pressure and do linear motion, belong to the common equipment of machinery field. In this embodiment, the piston rod is fixed with the light-transmitting plate 30, and the piston rod is vertically arranged, so that the light-transmitting plate 30 can be driven to move up and down.

The laser emitter 40 in the present application can be a laser mask irradiation device, a laser dot matrix irradiation device, a laser galvanometer scanning device, a laser rotating mirror scanning device, a single laser beam emitter, etc. in the prior art.

In one embodiment, the laser emitter 40 is movably connected to the frame 10 by a second driving mechanism 41, and the second driving mechanism 41 can drive the laser emitter 40 to move above the bottom plate 20; the second driving mechanism 41 includes a biaxial robot or biaxial moving platform.

In this embodiment, the second driving mechanism 41 drives the laser emitter 40 to move in a plane, that is, the laser emitter 40 only needs to move in the X-axis and Y-axis directions, and the device for implementing this function is a biaxial manipulator or a biaxial moving platform.

The double-shaft mechanical arm and the double-shaft moving platform are common equipment in the field of machining, the fixed end of the double-shaft mechanical arm and the double-shaft moving platform are connected with the laser emitter 40, and the double-shaft mechanical arm or the double-shaft moving platform drives the laser emitter 40 to move in the X-axis direction and the Y-axis direction.

The two-axis moving platform can be composed of two components which are arranged perpendicularly to each other and can move linearly. For example, two orthogonal screw nut pairs, two orthogonal piston rod cylinders, and two orthogonal piston rod cylinders.

It should be noted that the control system is pre-stored with a program for converting the printing information into the laser control signal. The control system is connected with a computer (PC) through a data line, a user transmits printing information to the control system through the PC, the control system converts the printing information into a laser control signal and transmits the laser control signal to the laser emitter 40 and the second driving mechanism 41, and the laser emitter 40 emits laser to burn and carbonize paper.

After the first driving mechanism 31 drives the transparent plate 30 to press the paper on the bottom plate 20, the second driving mechanism 41 drives the laser emitter 40 to move over the transparent plate 30, and the moving track of the laser emitter 40 forms a plane which is parallel to the paper to be printed and has the same size. The during operation, second actuating mechanism 41 drives laser emitter 40 activity, and when laser emitter 40 through the coordinate that needs to print, control system drive laser emitter 40 sent laser, shines the paper and form the carbonization vestige, and when laser emitter 40 left the coordinate that needs to print, control system closed laser emitter 40, does not shine the paper promptly, and after a lot of the same operation, the carbonization vestige and the printing information of paper match, print promptly and accomplish.

As shown in fig. 3, in one embodiment, two sides of the bottom plate 20 have a step-shaped first extension 21 and a step-shaped second extension 22; the first extension part 21 is higher than the bottom plate 20 and is connected with the paper box; the second extension 22 is lower than the bottom plate 20 and connected to the paper outlet.

The paper cassette is used for placing blank paper, and the blank paper is fed to the upper surface of the bottom plate 20 through the first extension part 21 by a paper feeding mechanism of a printer and a copier in the prior art.

The second extension portion 22 extends into the slot of the paper output, and the printed paper is sent out of the bottom plate 20 by the paper conveying mechanism 50 and falls to the second extension portion 22, so that the printed paper can be conveniently stacked in the slot of the paper output for the user to take out.

The specific execution steps of the inkless printing device in the application are as follows:

in step one, the paper feeding mechanism conveys blank paper from the paper box to the bottom plate 20, the front end edge of the paper is contacted with the paper conveying mechanism 50, the paper is monitored by the paper monitoring sensor 60 near the paper entering end (left side of the bottom plate 20), information of the monitored position is sent to the control system, and the control system drives the paper conveying mechanism 50 to move the paper forwards.

In the second step, the paper conveying mechanism 50 moves the paper to the working area of the bottom plate 20 (the middle part of the bottom plate 20), the paper monitoring sensor 60 at the position monitors the paper, and sends the information of the monitored position to the control system, and the control system stops the paper conveying mechanism 50.

And step three, the first driving mechanism 31 drives the transparent plate 30 to vertically descend and be attached to the bottom plate 20, and the transparent plate 30 and the bottom plate 20 press the paper in the middle.

And step four, the control system converts the printing information into an electric signal for driving the laser emitter 40 to emit laser, the second driving mechanism 41 drives the laser emitter 40 to move, the laser emitted by the laser emitter 40 penetrates through the light-transmitting plate 30 to irradiate the paper, and the part of the paper irradiated by the laser is burned and carbonized to form characters or patterns.

Step five, after the irradiation is completed, the paper conveying mechanism 50 conveys the paper out of the bottom plate 20.

In the fourth step, when the laser emitter 40 is a laser mask irradiation device, a laser dot matrix irradiation device, a laser galvanometer scanning device, or a laser rotating mirror scanning device, the second driving mechanism 41 is not needed, that is, the irradiation surface of the laser emitter 40 can cover the whole paper, and thus the second driving mechanism 41 is not needed to drive the whole paper to move.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An inkless printing apparatus, comprising:

a frame body (10);

a bottom plate (20), wherein the bottom plate (20) is arranged at the bottom of the frame body (10) and is used for bearing paper to be printed;

the light-transmitting plate (30) is movably connected with the frame body (10) through a first driving mechanism (31), and the first driving mechanism (31) can drive the light-transmitting plate (30) to move towards the direction of the bottom plate (20) so that the light-transmitting plate (30) is attached to the bottom plate (20) and the paper is tightly pressed;

the laser emitter (40), laser emitter (40) can send laser and see through light-passing board (30) is to the paper burns carbonization.

2. The inkless printing apparatus of claim 1, wherein the upper surface of the base plate (20) is of a smooth texture and the lower surface is of a heat sink texture.

3. The inkless printing device of claim 1, further comprising:

a paper transport mechanism (50), the paper transport mechanism (50) being for transporting the paper.

4. The inkless printing apparatus of claim 3, wherein the paper conveying mechanism (50) comprises a plurality of conveying rollers, the plurality of conveying rollers are arranged on two sides of the upper surface of the bottom plate (20) in a facing manner, the paper is sandwiched between the conveying rollers and the bottom plate (20), and the conveying rollers can drive the paper to slide relative to the bottom plate (20) when rotating.

5. The inkless printing apparatus of claim 1, further comprising:

a paper monitoring sensor (60), wherein the paper monitoring sensor (60) is used for monitoring the in-position condition of the paper.

6. The inkless printing apparatus of claim 1, further comprising:

a refrigeration mechanism for refrigerating the base plate (20).

7. The inkless printing device according to claim 6, wherein the cooling mechanism is a circulating water pump, the bottom plate (20) is a hollow structure and is provided with a water inlet (23) and a water outlet (24), the circulating water pump is respectively communicated with the water inlet (23) and the water outlet (24) through pipelines, and circulating cooling water is injected into the bottom plate (20).

8. The inkless printing device of claim 1, wherein the first drive mechanism (31) comprises one of a screw lift, a piston rod cylinder, a piston rod hydraulic cylinder.

9. The inkless printing apparatus according to claim 1, wherein the laser emitter (40) is movably connected to the frame (10) by a second driving mechanism (41), and the second driving mechanism (41) can drive the laser emitter (40) to move above the base plate (20); the second driving mechanism (41) comprises a biaxial manipulator or a biaxial moving platform.

10. Inkless printing device according to claim 1, wherein the base plate (20) has on both sides a first extension (21) and a second extension (22) stepped; the first extending part (21) is higher than the bottom plate (20) and is connected with the paper box; the second extending part (22) is lower than the bottom plate (20) and is connected with the paper outlet.