CN115610077A - Printing machine for producing environment-friendly paper-plastic printed matter and printing process thereof - Google Patents

Abstract

The invention relates to the technical field of printing machines, and discloses an environment-friendly printing machine for producing paper-plastic prints, which comprises a shell, an ink box, an ink distributing roller, an ink applying roller and a printing roller, wherein chutes are formed in the lower parts of the left side wall and the right side wall of an inner cavity of the ink box, tension springs are fixedly connected to the tops of the chutes, sliding plates are fixedly connected to the bottoms of the tension springs, connecting rods are fixedly connected to the top surfaces of the sliding plates and are positioned under the ink distributing roller, supporting rods are fixedly connected to the top surfaces of the sliding plates and are positioned under the ink applying roller, and cams are fixedly sleeved on the outer sides of rotating shafts of the ink distributing roller. According to the invention, the connecting rod is driven by the cam to move up and down, the sliding plate is driven to move down by the up-and-down movement of the connecting rod, when the sliding plate moves to the bottommost end, the sliding plate is driven to move up by the potential energy of the tension spring, and the sliding plate performs up-and-down reciprocating motion in the ink box, so that the ink in the ink box is stirred, the fluidity of the ink is increased, the uniformity of the ink is improved, and the quality of paper-plastic printing is further improved.

Description

Printing machine for producing environment-friendly paper-plastic printed matter and printing process thereof

Technical Field

The invention relates to the technical field of printing machines, in particular to a printing machine for producing environment-friendly paper-plastic printed matters and a printing process thereof.

Background

The paper-plastic printing is to print characters or patterns on a printing plate on a paper-plastic plate by impression, mainly comprises components such as an ink box, an inking roller, an ink distributing roller, a printing plate, an impression roller and the like, and is a printing machine commonly used in letterpress printing.

However, in the use process of the existing paper-plastic printing, ink is mainly sent into the ink box through the pumping mechanism, the pumping speed of the ink cannot exceed the printing loss speed, and the length of the ink box is long, so that the ink in the ink box far away from the pumping port flows slowly and even stays in a static state, and the phenomenon of precipitation of the ink in the ink box is easily caused, so that the concentration of the ink is uneven, and the quality of a printed finished product is poor.

Disclosure of Invention

Aiming at the defects of the prior printing machine in the use process in the background technology, the invention provides the printing machine for producing the environment-friendly paper plastic printing product and the printing process thereof, which have the advantages of improving the fluidity of ink in an ink box, increasing the uniformity of the ink and improving the definition of paper plastic printing, and solve the technical problems in the background technology.

The invention provides the following technical scheme: the utility model provides an environment-friendly paper is moulded seal article production and is used printing machine, includes shell, ink horn, even ink roller, inking roller and printing roller, the spout has been seted up to the lower part of lateral wall about the ink horn inner chamber, the top fixedly connected with extension spring of spout, the bottom fixedly connected with slide of extension spring, the top surface of slide just is located even ink roller and is connected with the connecting rod under, the top surface of slide just is located the inking roller and is fixedly connected with the bracing piece under, the fixed cam that has cup jointed in the pivot outside of even ink roller, the surface of printing roller is seted up flutedly, the inside sliding connection of recess has the printing plate, the cylinder chamber has been seted up to the inside of printing roller, the outside activity that the inside in cylinder chamber just is located the printing roller pivot has cup jointed the drum, the fixed surface of drum has cup jointed annular gasbag, the outside that the inside of printing roller just is located the cylinder chamber has seted up logical groove.

Preferably, the left side surface and the right side surface of the sliding plate are in clearance fit with the side walls of the sliding groove, and the front side surface and the rear side surface of the sliding plate are in sliding contact with the front side wall and the rear side wall of the inner cavity of the ink box.

Preferably, the top of the link is in sliding contact with the outer surface of the cam.

Preferably, the top of the supporting rod is an arc-shaped plate, and the radian of the arc-shaped plate at the top of the supporting rod is equal to that of the outer surface of the cylinder.

Preferably, the length of the cylinder is larger than the length of the cylindrical cavity, and the lower part of the outer surface of a section of the cylinder extending out of the cylindrical cavity is fixedly connected with the top of the supporting rod.

Preferably, the outer surface of the outer ring of the annular air bag is fixedly connected with the inner side wall of the cylindrical cavity, and the annular air bag is communicated with the groove through the through groove.

Preferably, a movable cavity is formed in the lower portion of the inner side of the supporting rod, and a piston rod is movably connected inside the movable cavity.

Preferably, the bottom of the movable cavity extends into the sliding plate and penetrates through the sliding plate.

Preferably, the pivot of inking roller stretches into the inside in activity chamber, the piston rod activity is cup jointed in the surface of inking roller pivot, the surface of piston rod bottom and the inside wall sliding contact in activity chamber.

A printing process for producing environment-friendly paper plastic printed products comprises the following steps:

firstly, a paper-plastic plate penetrates through a gap between a printing plate and a stamping roller, a driving device is started to drive an ink distributing roller, an ink coating roller and a printing roller to rotate, and the paper-plastic plate is printed through the printing plate;

secondly, the cam is driven to rotate through the rotation of the ink distributing roller, so that the cam is matched with the tension spring to continuously push the connecting rod to move up and down, the connecting rod drives the sliding plate to do up-and-down reciprocating motion, and the up-and-down reciprocating motion of the sliding plate is utilized to increase the fluidity of ink in the ink box;

thirdly, the support rod is driven to move up and down through the up-and-down reciprocating motion of the sliding plate, and the cylinder is driven to move down when the support rod moves down, so that the cylinder extrudes the annular air bag, gas in the annular air bag enters the through groove and finally acts on the bottom of the printing plate to apply upward pressure to the printing plate, and therefore the pressure of the printing plate on the paper-plastic plate is increased, and the printing definition is improved;

fourthly, the up-and-down movement of the sliding plate is matched with the piston rod, negative pressure is generated inside the movable cavity to adsorb ink under the action of the piston rod when the sliding plate moves down, so that the ink enters the movable cavity, and the ink inside the movable cavity is extruded out under the action of the piston rod when the sliding plate moves up, so that the fluidity of the ink inside the ink box is improved;

fifthly, the ink in the movable cavity is extruded by the piston rod, so that the pressure of the ink is increased, the pressure-increased ink applies upward pressure to the sliding plate, the pressure is exerted on the cylinder through the conduction of the supporting rod, the cylinder extrudes the annular air bag again, the gas in the annular air bag enters the groove through the groove and acts on the bottom of the printing plate, the pressure of the printing plate during printing the paper plastic plate is further increased, and the printing definition is improved.

The invention has the following beneficial effects:

1. according to the invention, through designing the sliding chute, the tension spring, the sliding plate, the connecting rod and the cam, the cam is rotated through the rotation of the ink distributing roller, the connecting rod is driven to move up and down through the rotation of the cam, the sliding plate is driven to move down through the up and down movement of the connecting rod, when the sliding plate moves to the bottommost end, the sliding plate is driven to move up through the potential energy of the tension spring, and the sliding plate is used for reciprocating up and down in the ink box, so that the ink in the ink box is stirred, the fluidity of the ink is increased, the uniformity of the ink is improved, and the quality of paper-plastic printing is further improved.

2. According to the invention, through designing the sliding chute, the tension spring, the sliding plate, the connecting rod, the supporting rod, the cam, the groove, the cylindrical cavity, the cylinder, the annular air bag and the through groove, the supporting rod is driven to move up and down in a reciprocating manner by utilizing the up-and-down movement of the sliding plate, when the sliding plate moves down, the supporting rod drives the cylinder to move down under the action of the supporting rod, so that the cylinder extrudes the lower part of the annular air bag, gas at the lower part of the annular air bag enters the upper part of the annular air bag, the printing plate is at the bottommost part of the groove, the printing plate cannot move up under the action of the embossing roller, the gas pressure is increased after the gas enters the upper part of the air bag, and the gas directly acts on the bottom of the printing plate under the action of the through groove, so that the pressure of the printing plate on the paper-plastic plate is increased, the embossing definition is increased, and the printing quality is increased.

3. According to the ink box, the sliding chute, the tension spring, the sliding plate, the connecting rod, the supporting rod, the movable cavity and the piston rod are designed, the piston rod is matched through the up-and-down movement of the sliding plate, when the sliding plate moves down, negative pressure is generated inside the movable cavity through the action of the piston rod, partial ink inside the ink box is sucked into the movable cavity and is extruded by the piston rod when the sliding plate moves up, and certain pressure is generated when the ink inside the movable cavity is extruded, so that the fluidity of the ink inside the ink box is improved, and the uniformity of the ink is further improved.

4. According to the invention, by designing the sliding chute, the tension spring, the sliding plate, the connecting rod, the supporting rod, the movable cavity and the piston rod, as the ink in the movable cavity is provided with pressure when being extruded, the pressure indirectly acts on the sliding plate through the conduction of the ink, so that the sliding plate can apply pressure upwards, and then acts on the cylinder through the conduction of the supporting rod, so that the cylinder extrudes the annular air bag, the printing of the printing plate on the paper-plastic plate is further promoted, and the printing definition is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic perspective view of an ink cartridge and a printing roller according to the present invention;

FIG. 3 is a schematic view of the internal structure of the ink cartridge of the present invention;

FIG. 4 is a schematic perspective view of a printing roll according to the present invention;

FIG. 5 is a schematic view of the internal three-dimensional structure of the printing roller according to the present invention;

fig. 6 is a schematic view of the internal three-dimensional structure of the support rod of the present invention.

In the figure: 1. a housing; 2. an ink cartridge; 21. a chute; 22. a tension spring; 23. a slide plate; 24. a connecting rod; 25. a support bar; 26. a movable cavity; 27. a piston rod; 3. an ink distributing roller; 31. a cam; 4. an inking roller; 5. a printing roller; 51. a groove; 52. printing plate; 53. a cylindrical cavity; 54. a cylinder; 55. an annular air bag; 56. a through groove; 6. a platen roller; 7. a paper-plastic board; 8. a feeding port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-6, an environment-friendly printing machine for producing paper-plastic prints comprises a housing 1, an ink box 2 is fixedly mounted at the bottom of an inner cavity of the housing 1, an ink distributing roller 3 is rotatably mounted inside the ink box 2 through a rotating shaft, an ink applying roller 4 is rotatably mounted inside the ink box 2 and on the right side of the ink distributing roller 3 through a rotating shaft, a printing roller 5 is rotatably mounted on the upper side of the ink applying roller 4 in the inner cavity of the housing 1 through a rotating shaft, a platen roller 6 is fixedly mounted on the upper side of the printing roller 5 in the inner cavity of the housing 1, a paper-plastic plate 7 is placed between the printing roller 5 and the platen roller 6, and a feeding port 8 is formed in the upper portion of the left side wall and the upper portion of the right side wall of the housing 1.

Referring to fig. 1-6, the lower portion of the left and right side walls of the inner cavity of the ink cartridge 2 is provided with a sliding chute 21, the top of the sliding chute 21 is fixedly welded with a tension spring 22, the bottom of the tension spring 22 is fixedly welded with a sliding plate 23, the left and right side surfaces of the sliding plate 23 are in clearance fit with the side walls of the sliding chute 21, the front and rear side surfaces of the sliding plate 23 are in sliding contact with the front and rear side walls of the inner cavity of the ink cartridge 2, so that the ink inside the ink cartridge 2 passes through the clearance between the sliding plate 23 and the sliding chute 21 to increase the fluidity of the ink, the top surface of the sliding plate 23 is fixedly welded with a connecting rod 24 under the ink distributing roller 3, the top surface of the sliding plate 23 is fixedly welded with a support rod 25 under the ink distributing roller 4, the outer side of the rotating shaft of the ink distributing roller 3 is fixedly sleeved with a cam 31, the top of the connecting rod 24 is in sliding contact with the outer surface of the cam 31, so as to ensure that the connecting rod 24 is driven to move when the cam 31 rotates, the outer surface of the printing roller 5 is provided with a groove 51, the printing plate 52 is connected to the inside of the groove 51 in a sliding manner, a cylindrical cavity 53 is formed in the printing roller 5, a cylinder 54 is movably sleeved inside the cylindrical cavity 53 and located on the outer side of a rotating shaft of the printing roller 5, the top of the supporting rod 25 is an arc-shaped plate, the radian of the arc-shaped plate on the top of the supporting rod 25 is equal to the radian of the outer surface of the cylinder 54, the top of the supporting rod 25 is convenient to be attached to the cylinder 54, the length of the cylinder 54 is larger than that of the cylindrical cavity 53, the lower part of the outer surface of one section of the cylinder 54 extending out of the cylindrical cavity 53 is fixedly connected with the top of the supporting rod 25, the cylinder 54 can be driven to move upwards when the supporting rod 25 moves upwards, an annular air bag 55 is fixedly sleeved on the outer surface of the cylinder 54, a through groove 56 is formed in the inside of the printing roller 5 and located on the outer side of the cylindrical cavity 53, the outer surface of the outer ring of the annular air bag 55 is fixedly connected with the inner side wall of the cylindrical cavity 53, the annular air bag 55 is communicated with the groove 51 through the through groove 56, when the annular air bag 55 is pressed by the cylinder 54, the air in the annular air bag 55 can directly act on the bottom of the printing plate 52 by the transmission of the through groove 56.

Referring to fig. 1-6, when the printing apparatus works, the cam 31 is driven to rotate by the rotation of the ink distributing roller 3, the cam 31 is used in cooperation with the tension spring 22 to make the connecting rod 24 reciprocate up and down, so that the connecting rod 24 drives the sliding plate 23 to reciprocate up and down, and the ink inside the ink box 2 is agitated by the sliding plate 23 through the movement of the sliding plate 23, and the ink flows along the gap due to the gap between the sliding plate 23 and the sliding groove 21, thereby increasing the fluidity of the ink inside the ink box 2, improving the uniformity of the ink, and improving the printing quality of the paper-plastic plate 7;

along with the up-and-down movement of the sliding plate 23, the up-and-down movement of the sliding plate 23 drives the cylinder 54 to do up-and-down reciprocating movement through the connection of the supporting rod 25, so that the circular air bag 55 is extruded by the movement of the cylinder 54, the air in the circular air bag 55 directly acts on the bottom of the printing plate 52 through the transmission of the through groove 56 to apply an upward pressure to the printing plate 52, and at the moment, the printing plate 52 cannot move upwards continuously, so that the pressure applied to the printing plate 52 by the air can only be applied to the paper-plastic plate 7 by the printing plate 52, and the printing definition of the paper-plastic plate 7 is improved.

A printing process for producing environment-friendly paper plastic printed products comprises the following steps:

firstly, a paper-plastic plate 7 passes through a gap between a printing plate 52 and a stamping roller 6, a driving device is started to drive an ink distributing roller 3, an ink coating roller 4 and a printing roller 5 to rotate, and the paper-plastic plate 7 is printed through the printing plate 52;

secondly, the cam 31 is driven to rotate through the rotation of the ink distributing roller 3, so that the cam 31 is matched with the tension spring 22 to continuously push the movable connecting rod 24 to move up and down, the connecting rod 24 drives the sliding plate 23 to do up-and-down reciprocating motion, and the fluidity of ink in the ink box 2 is increased by utilizing the up-and-down reciprocating motion of the sliding plate 23;

thirdly, the support rod 25 is driven to move up and down by the up-and-down reciprocating motion of the sliding plate 23, and the cylinder 54 is driven to move down when the support rod 25 moves down, so that the cylinder 54 extrudes the annular air bag 55, gas in the annular air bag 55 enters the through groove 56 and finally acts on the bottom of the printing plate 52, upward pressure is applied to the printing plate 52, the printing pressure of the printing plate 52 on the paper-plastic plate 7 is increased, and the printing definition is improved;

fourthly, the sliding plate 23 is moved up and down to be matched with the piston rod 27, negative pressure is generated inside the movable cavity 26 to absorb ink under the action of the piston rod 27 when the sliding plate 23 moves down, so that the ink enters the movable cavity 26, and the ink inside the movable cavity 26 is extruded out under the action of the piston rod 27 when the sliding plate 23 moves up, so that the fluidity of the ink inside the ink box 2 is improved;

fifthly, the ink in the movable cavity 26 is extruded by the piston rod 27, so that the pressure of the ink is increased, the ink with the increased pressure exerts upward pressure on the sliding plate 23 and acts on the cylinder 54 through conduction of the supporting rod 25, the cylinder 54 presses the annular air bag 55 again, the air in the annular air bag 55 enters the groove 51 through the through groove 56 and acts on the bottom of the printing plate 52, the pressure of the printing plate 52 when the printing plate 52 prints on the paper-plastic plate 7 is further increased, and the printing definition is improved.

The use method (working principle) of the first embodiment of the invention is as follows:

firstly, a paper-plastic plate 7 penetrates through a gap between a printing plate 52 and a stamping roller 6, a driving device drives an ink distributing roller 3, an ink coating roller 4 and a printing roller 5 to rotate, the paper-plastic plate 7 is printed, the cam 31 is driven to rotate when the ink distributing roller 3 rotates, a connecting rod 24 is driven to reciprocate up and down through the cooperation of the cam 31 and a tension spring 22, the connecting rod 24 drives a sliding plate 23 to reciprocate up and down, the fluidity of ink in an ink box 2 is increased through the movement of the sliding plate 23, meanwhile, the sliding plate 23 is connected with a cylinder 54 through a supporting rod 25, the cylinder 54 is driven to reciprocate up and down through the cooperation of the cam 31 and the tension spring 22, the cylinder 54 extrudes an annular air bag 55, gas in the annular air bag 55 directly acts on the bottom of the printing plate 52 through the transmission of a through groove 56, and the printing pressure of the printing plate 52 on the paper-plastic plate 7 is increased.

Example two

Referring to fig. 1-6, a chute 21 is formed in the lower portion of the left and right side walls of the inner cavity of the ink box 2, a tension spring 22 is fixedly welded at the top of the chute 21, a sliding plate 23 is fixedly welded at the bottom of the tension spring 22, a connecting rod 24 is fixedly welded on the top surface of the sliding plate 23 and under the ink distributing roller 3, a supporting rod 25 is fixedly welded on the top surface of the sliding plate 23 and under the ink distributing roller 4, a movable cavity 26 is formed in the lower portion of the inner side of the supporting rod 25, the bottom of the movable cavity 26 extends into the sliding plate 23 and penetrates through the sliding plate 23, the movable cavity 26 is conveniently communicated with the inner cavity of the ink box 2, fluidity of ink is guaranteed, a piston rod 27 is movably connected inside the movable cavity 26, a rotating shaft of the ink distributing roller 4 extends into the movable cavity 26, the piston rod 27 is movably sleeved on the outer surface of the rotating shaft of the ink distributing roller 4, the outer surface of the bottom of the piston rod 27 is in sliding contact with the inner side wall of the movable cavity 26, and when the movable cavity 26 is moved by the supporting rod 25, the movable cavity 26, the position of the piston rod 27 is fixed, and suction action of ink is realized.

Referring to fig. 1-6, when the cam 31 drives the sliding plate 23 to move downward through the connection of the connecting rod 24, the sliding plate 23 drives the supporting rod 25 to move downward, the piston rod 27 is sleeved on the rotating shaft of the inking roller 4, so that the position of the piston rod 27 is not moved, and at this time, the movable cavity 26 is matched with the piston rod 27 to generate negative pressure in the movable cavity 26, so that part of the ink in the ink box 2 is sucked into the movable cavity 26, and then the sliding plate 23 drives the supporting rod 25 to move upward again, so that the piston rod 27 extrudes the ink in the movable cavity 26, and the ink in the movable cavity 26 is extruded out, thereby further increasing the fluidity and uniformity of the ink in the ink box 2, and improving the printing quality;

secondly, because the ink in the movable cavity 26 is pressurized when being extruded by the piston rod 27, a reaction force is applied to the sliding plate 23 when the ink is extruded, so that the sliding plate 23 is forced to move upwards, the supporting rod 25 drives the cylinder 54 to move upwards, the annular air bag 55 is squeezed, the air in the annular air bag 55 is transmitted through the through groove 56 to act on the printing plate 52, the printing of the printing plate 52 on the paper-plastic plate 7 is promoted, and the printing definition of the paper-plastic plate 7 is further improved.

The use method (working principle) of the second embodiment of the invention is as follows:

when the sliding plate 23 moves down under the action of the connecting rod 24, the sliding plate 23 drives the supporting rod 25 to move down, the position of the piston rod 27 is not moved, negative pressure is generated inside the movable cavity 26 by utilizing the matching between the movable cavity 26 on the supporting rod 25 and the piston rod 27, so that part of ink in the ink box 2 is sucked into the movable cavity 26, the sliding plate 23 drives the supporting rod 25 to move up again, the piston rod 27 is enabled to extrude the ink in the movable cavity 26, and the fluidity and the uniformity of the ink are improved.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a printer is used in production of environment-friendly paper plastic printing article, includes shell (1), ink horn (2), even ink roller (3), inking roller (4) and printing roller (5), its characterized in that: spout (21) have been seted up to the lower part of lateral wall about ink horn (2) inner chamber, top fixedly connected with extension spring (22) of spout (21), bottom fixedly connected with slide (23) of extension spring (22), the top surface of slide (23) just is located even ink roller (3) under fixedly connected with connecting rod (24), the top surface of slide (23) just is located under fixedly connected with bracing piece (25) of inking roller (4), the pivot outside fixed cover of even ink roller (3) has cup jointed cam (31), the surface of printing roller (5) is seted up fluted (51), the inside sliding connection of recess (51) has printing plate (52), cylinder chamber (53) has been seted up to the inside of printing roller (5), the outside that the inside of cylinder chamber (53) just is located printing roller (5) pivot has cup jointed activity has drum (54), the external surface fixation of drum (54) has cup jointed annular gasbag (55), logical groove (56) has been seted up to the outside that the inside of printing roller (5) just is located cylinder chamber (53).

2. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 1, wherein: the left side surface and the right side surface of the sliding plate (23) are in clearance fit with the side walls of the sliding groove (21), and the front side surface and the rear side surface of the sliding plate (23) are in sliding contact with the front side wall and the rear side wall of the inner cavity of the ink box (2).

3. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 1, wherein: the top of the link (24) is in sliding contact with the outer surface of the cam (31).

4. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 1, wherein: the top of the supporting rod (25) is an arc-shaped plate, and the radian of the arc-shaped plate at the top of the supporting rod (25) is equal to that of the outer surface of the cylinder (54).

5. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 1, wherein: the length of the cylinder (54) is larger than the length of the cylindrical cavity (53), and the lower part of the outer surface of one section of the cylinder (54) extending out of the cylindrical cavity (53) is fixedly connected with the top of the supporting rod (25).

6. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 1, wherein: the outer surface of the outer ring of the annular air bag (55) is fixedly connected with the inner side wall of the cylindrical cavity (53), and the annular air bag (55) is communicated with the groove (51) through a through groove (56).

7. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 1, wherein: the lower part of the inner side of the supporting rod (25) is provided with a movable cavity (26), and the inside of the movable cavity (26) is movably connected with a piston rod (27).

8. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 7, wherein: the bottom of the movable cavity (26) extends into the sliding plate (23) and penetrates through the sliding plate (23).

9. The printing machine for producing the environment-friendly paper-plastic printed matter as claimed in claim 7, wherein: the pivot of inking roller (4) stretches into the inside in activity chamber (26), piston rod (27) activity is cup jointed in the surface of inking roller (4) pivot, the surface of piston rod (27) bottom and the inside wall sliding contact in activity chamber (26).

10. A printing process for producing environment-friendly paper plastic printed products is characterized by comprising the following steps:

firstly, a paper-plastic plate (7) passes through a gap between a printing plate (52) and a stamping roller (6), a driving device is started to drive an ink distributing roller (3), an ink applying roller (4) and a printing roller (5) to rotate, and the paper-plastic plate (7) is printed through the printing plate (52);

secondly, the cam (31) is driven to rotate through the rotation of the ink distributing roller (3), so that the cam (31) continuously pushes the connecting rod (24) to move up and down in a matching way with the tension spring (22), the connecting rod (24) drives the sliding plate (23) to do up-and-down reciprocating motion, and the fluidity of ink in the ink box (2) is improved by utilizing the up-and-down reciprocating motion of the sliding plate (23);

thirdly, the support rod (25) is driven to move up and down through the up-and-down reciprocating motion of the sliding plate (23), the cylinder (54) is driven to move down when the support rod (25) moves down, the cylinder (54) extrudes the annular air bag (55), air in the annular air bag (55) is promoted to enter the through groove (56) and finally act on the bottom of the printing plate (52), upward pressure is applied to the printing plate (52), so that the printing pressure of the printing plate (52) on the paper plastic plate (7) is increased, and the printing definition is improved;

fourthly, the up-and-down movement of the sliding plate (23) is matched with the piston rod (27), negative pressure is generated inside the movable cavity (26) to adsorb ink under the action of the piston rod (27) when the sliding plate (23) moves down, the ink enters the movable cavity (26), and the ink inside the movable cavity (26) is extruded out under the action of the piston rod (27) when the sliding plate (23) moves up, so that the fluidity of the ink inside the ink box (2) is improved;

fifthly, the ink in the movable cavity (26) is extruded by the piston rod (27) to increase the pressure of the ink, the ink with increased pressure exerts upward pressure on the sliding plate (23) and acts on the cylinder (54) through the conduction of the supporting rod (25), the cylinder (54) extrudes the annular air bag (55) again, so that the gas in the annular air bag (55) enters the groove (51) through the through groove (56) and acts on the bottom of the printing plate (52), the pressure of the printing plate (52) on the paper-plastic plate (7) during printing is further increased, and the printing definition is improved.

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