CN114701246B

CN114701246B - Printing method and printing equipment

Info

Publication number: CN114701246B
Application number: CN202210409967.XA
Authority: CN
Inventors: 王威; 邱泰康; 黄国梅; 凡丽珍; 何金海
Original assignee: Embossed Art Color Dongguan Printing Co ltd
Current assignee: Embossed Art Color Dongguan Printing Co ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2023-07-14
Anticipated expiration: 2042-04-19
Also published as: CN114701246A

Abstract

The invention discloses a printing method and printing equipment, which comprises an unreeling roller, a tensioning mechanism, a guide roller, a printing mechanism and a reeling roller which are sequentially arranged along the conveying direction of a printing stock, wherein the printing mechanism comprises an elastic frame fixed on a frame, a printing area is formed at the bottom of the elastic frame, the printing stock is positioned in the printing area when passing through the printing mechanism, elastic inkpad is filled in the elastic frame, and a silk screen plate is assembled at the position of the bottom of the elastic frame corresponding to the printing area. When the printing stock passes through the printing area of the elastic frame, the inkpad and the printing stock can be in a close joint state all the time, and the second pressing wheel is directly pressed on the back surface of the printing stock, so that the printing stock and the inkpad are further jointed, the printing quality is ensured, and the influence on the printing quality due to deformation of the middle part of the silk screen plate is avoided.

Description

Printing method and printing equipment

Technical Field

The invention relates to the technical field of printing, in particular to a printing method and printing equipment.

Background

In the printing process, there are two main factors affecting the quality of printing, the first is the pressure between the rubber blanket and the substrate; the second is the degree of adhesion of the substrate to the printing surface. In the actual operation process, a printing object usually passes through a frame with inkpad, and then rolls on a silk screen plate at the bottom of the frame through a rubber roller in a pressing manner, so that patterns on the silk screen plate are printed on the printing object, but after a large number of printing operations are performed on the silk screen plate, due to the fact that acting force is continuously applied to the silk screen plate by the rubber roller, the middle position of the silk screen plate is sunken, namely, the sunken part in the middle of the silk screen plate cannot be well attached to the printing object, and therefore the printing quality is affected.

Disclosure of Invention

The present invention is directed to a printing method and a printing apparatus, which solve the above-mentioned problems.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a lithography apparatus, includes unreeling roller, straining device, direction roller, printing mechanism and the wind-up roll that set gradually along stock direction of delivery, printing mechanism is including fixing the elastic framework in the frame, the bottom of elastic framework is formed with the printing region, and the stock is located this printing region when printing mechanism, the inside of elastic framework is filled with the elastic ink pad, the bottom of elastic framework corresponds printing region department and is equipped with the silk screen board, the inside of elastic framework has arranged the arc shell fragment along the direction of delivery of stock to the middle part of arc shell fragment upwards protruding the setting, the inner wall of elastic framework corresponds the both ends integrated into one piece of arc shell fragment and is equipped with the arc backup pad, the both ends of arc shell fragment are pegged graft to the recess of the inside formation of arc backup pad, and the activity space is reserved along the arc direction of extension of arc shell fragment with the recess inside of arc backup pad. The upper part and the lower part of the elastic frame are respectively provided with a first pressing wheel and a second pressing wheel, the first pressing wheel and the second pressing wheel can synchronously move in opposite directions in the vertical direction to press the upper end face and the lower end face of the elastic frame, and the first pressing wheel and the second pressing wheel are pressed at one end of the elastic frame and then move to the other end of the elastic frame along the conveying direction of a printing stock.

Preferably, the elastic frame is fixed on the inner side of the frame through a connecting rod connected with the periphery of the elastic frame; the first pinch roller is rotationally arranged on a wheel frame arranged above the first pinch roller, first transmission blocks are fixed at two ends of the wheel frame along the length direction, the second pinch roller is rotationally arranged on the wheel frame arranged below the second pinch roller, second transmission blocks are fixed at two ends of the wheel frame provided with the second pinch roller, a mounting plate is arranged above the wheel frame provided with the first pinch roller, a first motor is arranged at the tops of two ends of the mounting plate along the length direction, a motor shaft of the first motor downwards extends through the mounting plate and then is fixedly sleeved with a threaded rod, the threaded rod downwards extends through the first transmission blocks and the second transmission blocks and then is rotationally connected with the bottom of the frame, and the first transmission blocks and the second transmission blocks are respectively in threaded fit with the threaded rod.

Preferably, the top of the mounting plate is fixedly provided with a limit frame along the length direction, the inner side of the limit frame is provided with a piston sliding block, either side of the top of the frame along the conveying direction of the printing stock is fixedly provided with a rodless cylinder, a piston rod of the rodless cylinder is arranged at the top of the frame along the horizontal direction, and the piston rod penetrates through the limit frame and the piston sliding block and is in sliding fit with the limit frame and the piston sliding block; the bottom of the threaded rod is fixedly connected with a sliding block, a limiting groove is formed at the bottom of the frame corresponding to the sliding direction of the sliding block, a second guide rod is fixed in the limiting groove along the length direction of the limiting groove, and the sliding block is embedded into the limiting groove and is sleeved on the second guide rod in a sliding manner; the top of frame is located the both sides of piston rod and still erects first guide bar, every first guide bar all runs through spacing frame and is connected with it sliding fit.

Preferably, the tensioning mechanism comprises fixed blocks arranged on two sides of the top of the U-shaped plate, a floating roller is rotatably connected between the two fixed blocks, and printing stock output from the unreeling roller is guided into the guide roller through the floating roller; the U-shaped plate comprises a U-shaped plate body, wherein the side walls on two sides of the U-shaped plate body are vertically provided with grooves, the tops of the grooves extend to the tops of the U-shaped plate body, the grooves penetrate through the side walls of the U-shaped plate body along the width direction of the U-shaped plate body and are arranged, the second telescopic rods are arranged in the grooves along the vertical direction, the middle parts of the grooves are separated by stop plates which are horizontally arranged to form two groove bodies, the fixed ends of the second telescopic rods penetrate through the stop plates and then are distributed in the groove bodies below, and the telescopic ends of the second telescopic rods upwards extend through the groove bodies above and are fixedly connected with fixed blocks which are in sliding fit with the groove bodies above; the movable end of the second telescopic rod is sleeved with a second spring, and the second spring is used for driving the fixed block and the stop plate to be away from each other.

Preferably, the bottom of the fixed end of the second telescopic rod is fixedly connected with a base, the base is in sliding connection with the lower groove body, and the fixed end of the second telescopic rod is in sliding connection with the stop plate; when the first pinch roller and the arc-shaped supporting plate are pressed on the elastic frame, the base slides upwards along the vertical direction so that the floating roller tightens a printing stock.

Preferably, the fluted disc is rotationally connected on the roller support of guide roller both sides, rotate on the outer wall of frame and install the gear that meshes with the fluted disc, the inside of frame is fixed with the second motor that links to each other with the gear drive, the center department of fluted disc is fixed with the fixed axle, fixed first telescopic link has been cup jointed on the periphery of fixed axle, the expansion end-to-end connection of first telescopic link has spacing baffle, the position department that the expansion end of first telescopic link is close to spacing baffle has rotated the sleeve pipe, first spring has been cup jointed between sleeve pipe and the stiff end of first telescopic link, be fixed with the rotation bush on the periphery of sleeve pipe, the rotation bush extends towards the direction of base and rotates and connect on its outer wall, through the anticlockwise rotation of first telescopic link makes the base follow vertical direction upward movement.

Preferably, an infrared emitter is arranged on any side of the first transmission block, an infrared receiving sensor matched with the infrared emitter is arranged on the frame at a position corresponding to the infrared emitter, and the infrared receiving sensor is connected with the second motor through an electric signal.

The invention also provides a printing method which is applied to the printing equipment and comprises the following steps:

the rolling roller rotates to drive a printing stock on the unreeling roller to sequentially move on the tensioning mechanism, the guide roller and the printing mechanism, and when the printing stock passes through the printing mechanism, the first pressing wheel and the second pressing wheel synchronously move in opposite directions until the first pressing wheel is pressed on the upper end surface of the elastic frame and the second pressing wheel is pressed on the back of the printing stock in the printing area, and at the moment, the rolling roller stops rotating;

the first pressing wheel and the second pressing wheel move along the conveying direction of the printing stock, move from one end of the elastic frame to the other end of the elastic frame, the first pressing wheel acts on the arc-shaped elastic sheet to enable the arc-shaped elastic sheet to extrude the elastic inkpad below the arc-shaped elastic sheet, the elastic inkpad is tightly attached to the silk screen plate, the second pressing wheel acts on the back of the printing stock to enable the printing stock to be attached to the silk screen plate, and the printing is completed through synchronous movement and cooperation of the first pressing wheel and the second pressing wheel on the elastic frame.

Compared with the prior art, the invention provides a printing method and printing equipment, which have the following beneficial effects:

(1) When a printing object passes through a printing area of the elastic frame, the first pressing wheel and the second pressing wheel can synchronously move in opposite directions in the vertical direction to press the upper end face and the lower end face of the elastic frame, the first pressing wheel and the second pressing wheel are pressed at one end of the elastic frame and then move to the other end of the elastic frame along the conveying direction of the printing object, the first pressing wheel acts on the arc-shaped elastic sheet in the process of moving along the conveying direction of the printing object, the arc-shaped elastic sheet is downwards sunken due to stress, so that the inkpad below the arc-shaped elastic sheet is attached to the screen plate, the attaching degree of the inkpad and the printing object is guaranteed, the second pressing wheel is directly pressed at the back face of the printing object, the printing object is further attached to the inkpad, the printing quality is guaranteed, and the printing quality is prevented from being influenced due to deformation of the middle part of the screen plate.

(2) The tensioning mechanism can also tension the printing stock on the unreeling roller during printing, because the unreeling roller has inertia, when the first pressing wheel and the second pressing wheel are pressed on the elastic frame, the printing stock on the unreeling roller is still in a release state, the infrared transmitter on the first transmission block transmits infrared rays to the infrared receiving sensor at the moment, the infrared receiving sensor can control the second motor to drive after receiving the infrared rays, the second motor drives the gear to rotate, the fluted disc is further driven to rotate, the fluted disc acts to drive the first telescopic rod to swing, the floating roller is driven to move upwards, the printing stock at the position is tensioned again, after printing is finished, the second motor stops working, the floating roller returns to the initial position under the action of the first spring and the second spring, the tensioning force of the printing stock is not greatly different from the initial tensioning force under the action of the two springs, so that the printing stock can be uniformly wound on the reeling roller, the phenomenon that the printing stock is prevented from being broken due to the fact that the printing stock is lost due to the tension on the unreeling roller and the reeling roller is reduced, and the phenomenon that the printing stock is prevented from being broken at the same time is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and together with the embodiments of the invention and do not constitute a limitation to the invention, and in which:

FIG. 1 is a schematic view of an embodiment of an overall printing apparatus at an isometric angle;

FIG. 2 is a schematic diagram of the front view of the entire printing apparatus in an embodiment;

FIG. 3 is a schematic view of an embodiment of a printing mechanism at an isometric view;

FIG. 4 is a schematic view of a printing mechanism according to an embodiment at another isometric view;

FIG. 5 is a schematic structural view of an elastic frame according to an embodiment;

FIG. 6 is a schematic cross-sectional view of the elastic frame of FIG. 5 taken at an axial angle;

FIG. 7 is a schematic view of a tensioning mechanism as set forth in the examples;

FIG. 8 is a schematic view of a partial enlarged structure at A in FIG. 7;

fig. 9 is a schematic view showing the assembly of the tensioning mechanism on the U-shaped plate according to the embodiment.

In the figure: 1. an unreeling roller; 2. a roller bracket; 3. a tensioning mechanism; 4. a guide roller; 5. a printing mechanism; 6. a wind-up roll; 7. a first telescopic rod; 8. fluted disc; 9. a gear; 10. a rodless cylinder; 11. a piston rod; 12. a first guide bar; 13. a limit frame; 14. a mounting plate; 15. a first motor; 16. a threaded rod; 17. a first transmission block; 18. a wheel carrier; 19. a first pinch roller; 20. an infrared emitter; 21. an elastic frame; 22. a connecting rod; 23. a second pinch roller; 24. a second transmission block; 25. a slide block; 26. a limit groove; 27. a second guide bar; 28. a piston slide block; 29. an infrared receiving sensor; 30. a second motor; 31. a printing area; 32. an arc-shaped supporting plate; 33. an arc-shaped elastic sheet; 34. a wire mesh plate; 35. an elastic inkpad; 36. a fixed shaft; 37. a first spring; 38. a stop plate; 39. a U-shaped plate; 40. a fixed block; 41. a floating roller; 42. a second telescopic rod; 43. a base; 44. a sleeve; 45. a limit stop plate; 46. rotating the bushing; 47. a second spring; 48. a frame.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.

Referring to fig. 1-9, the present embodiment provides a printing apparatus, which includes an unreeling roller 1, a tensioning mechanism 3, a guiding roller 4, a printing mechanism 5 and a reeling roller 6 sequentially arranged along a conveying direction of a printing material.

The printing mechanism 5 in this embodiment includes an elastic frame 21 fixed on a frame 48, a printing area 31 is formed at the bottom of the elastic frame 21, a printing object is located in the printing area 31 when passing through the printing mechanism 5, an elastic ink pad 35 is filled in the elastic frame 21, a wire mesh plate 34 is assembled at the bottom of the elastic frame 21 corresponding to the printing area 31, an arc-shaped elastic sheet 33 is arranged in the elastic frame 21 along the conveying direction of the printing object, the middle of the arc-shaped elastic sheet 33 is arranged in an upward protruding manner, two ends of the inner wall of the elastic frame 21 corresponding to the arc-shaped elastic sheet 33 are integrally formed and assembled with an arc-shaped support plate 32, two ends of the arc-shaped elastic sheet 33 are inserted into grooves formed in the arc-shaped support plate 32, a movable space is reserved between the tail ends of the arc-shaped elastic sheet 33 and the inner parts of the grooves of the arc-shaped support plate 32 along the arc-extending direction of the arc-shaped elastic sheet 33, the initial state of the arc-shaped elastic sheet 33 is as shown in fig. 6, when the arc-shaped elastic sheet 33 is deformed, the two ends of the arc-shaped elastic sheet 33 extend along the arc length direction and can slide toward the bottom of the grooves in the arc-shaped support plate 32, and after the arc-shaped elastic sheet 33 returns to the initial position. The first pressing wheel 19 and the second pressing wheel 23 are respectively arranged above and below the elastic frame 21, the first pressing wheel 19 and the second pressing wheel 23 can synchronously move in opposite directions in the vertical direction to press the upper end face and the lower end face of the elastic frame 21, and the first pressing wheel 19 and the second pressing wheel 23 are pressed at one end of the elastic frame 21 and then move to the other end of the elastic frame 21 along the conveying direction of a printing stock.

When the scheme is implemented, the rolling roller 6 rotates to drive the printing stock on the unreeling roller 1 to sequentially move on the tensioning mechanism 3, the guide roller 4 and the printing mechanism 5, and finally the printing stock is wound on the rolling roller 6 after printing. When a printing object passes through the printing mechanism 5, the first pressing wheel 19 and the second pressing wheel 23 synchronously move in opposite directions until the first pressing wheel 19 is pressed on the upper end surface of the elastic frame 21 and the second pressing wheel 23 is pressed on the back surface of the printing object in the printing area 31, and the winding roller 6 stops rotating at the moment;

the first pressing wheel 19 and the second pressing wheel 23 move along the conveying direction of the printing stock, move from one end to the other end of the elastic frame 21, the first pressing wheel 19 acts on the arc-shaped elastic sheet 33 to enable the arc-shaped elastic sheet 33 to squeeze the elastic ink paste 35 below the arc-shaped elastic sheet 33, the elastic ink paste 35 is tightly attached to the screen plate 34, the second pressing wheel 23 acts on the back of the printing stock to enable the back of the printing stock to be attached to the screen plate 34, and printing is completed through synchronous movement and cooperation of the first pressing wheel 19 and the second pressing wheel 23 on the elastic frame 21.

As shown in fig. 3, the elastic frame 21 in the above-described scheme is fixed to the inside of the frame 48 by the connection rod 22 connected to the peripheral side thereof. The first pinch roller 19 is rotatably mounted on a wheel frame 18 arranged above the first pinch roller 19, first transmission blocks 17 are fixed at two ends of the wheel frame 18 along the length direction, the second pinch roller 23 is rotatably mounted on the wheel frame 18 arranged below the second pinch roller, second transmission blocks 24 are fixed at two ends of the wheel frame 18 provided with the second pinch roller 23, a mounting plate 14 is arranged above the wheel frame 18 provided with the first pinch roller 19, a first motor 15 is mounted on the tops of two ends of the mounting plate 14 along the length direction, a motor shaft of the first motor 15 extends downwards and penetrates through the mounting plate 14 to fixedly sleeve a threaded rod 16, the threaded rod 16 extends downwards and penetrates through the first transmission blocks 17 and the second transmission blocks 24 to be rotationally connected with the bottom of the frame 48, the first transmission blocks 17 and the second transmission blocks 24 are respectively in threaded fit with the threaded rod 16, and the internal thread directions of the first transmission blocks 17 and the second transmission blocks 24 are opposite, when the scheme is implemented, the first motor 15 is started to drive the threaded rod 16 to rotate, and the first transmission blocks 17 and the second transmission blocks 24 are driven by the threaded rod 16 to move synchronously on the first transmission blocks 16 and the second transmission blocks 24, and the first pinch rollers 19 are driven by the first transmission blocks and the second transmission blocks 24 to move synchronously on the threaded rod 16 and the opposite directions.

Furthermore, on the basis of the above-mentioned scheme, in order to realize that the first pressing wheel 19 and the second pressing wheel 23 are pressed on the elastic frame 21 and then move along the conveying direction of the printing object, in this embodiment, the top of the mounting plate 14 is fixedly equipped with the limiting frame 13 along the length direction thereof, the inner side of the limiting frame 13 is provided with the piston slide block 28, any side of the conveying direction of the printing object along the top of the frame 48 is fixed with the rodless cylinder 10, the piston rod 11 of the rodless cylinder 10 is erected on the top of the frame 48 along the horizontal direction, the piston rod 11 penetrates through the limiting frame 13 and the piston slide block 28 and is in sliding fit with the same, the piston slide block 28 is driven to slide on the piston rod 11 through the rodless cylinder 10, and the piston slide block 28 is fixed on the mounting plate 14, so that the mounting plate 14 is driven to move along the rod length direction of the piston rod 11, the top of the frame 48 is positioned on two sides of the piston rod 11, each first guide rod 12 is erected on two sides of the piston rod 11, and each first guide rod 12 penetrates through the limiting frame 13 and is in sliding fit connection with the limiting frame 13, and the two first guide rods 12 are matched with the limiting frame 13 to promote stability of the mounting plate 14 when moving along the piston rod 11. The bottom fixedly connected with slider 25 of threaded rod 16, the frame 48 bottom is formed with spacing groove 26 corresponding to the slip direction of slider 25, the inside second guide bar 27 that is fixed with along its groove length direction of spacing groove 26, slider 25 imbeds to spacing groove 26 and slide cup joints on second guide bar 27, when the rod length direction motion of mounting panel 14 at piston rod 11, slider 25 of threaded rod 16 bottom slides in spacing groove 26 to slider 25 overlaps on second guide bar 27 all the time, can avoid it to slip from spacing groove 26.

As shown in fig. 7, the printing device provided in this embodiment further includes a tensioning mechanism 3, before printing is started, the tensioning force between the wind-up roller 6 and the unreeling roller 1 is firstly adjusted by the tensioning mechanism 3, so that the printing stock can be uniformly and tightly wound on the wind-up roller 6 after printing is finished, while the tensioning mechanism 3 in this embodiment includes fixing blocks 40 arranged on two sides of the top of the U-shaped plate 39, a floating roller 41 is rotatably connected between the two fixing blocks 40, the printing stock output from the unreeling roller 1 is guided into the guide roller 4 through the floating roller 41, and before printing is started, the printing stock generates a pressure on the guiding roller through the floating roller 41, and the fixing blocks 40 move downwards due to the pressure. Grooves are formed in the vertical direction on the side walls of the two sides of the U-shaped plate 39, the tops of the grooves extend to the tops of the U-shaped plate 39, the grooves penetrate through the side walls of the U-shaped plate 39 along the width direction of the U-shaped plate 39 and are arranged, second telescopic rods 42 are arranged in the grooves along the vertical direction, two groove bodies are formed in the middle of each groove in a separated mode through stop plates 38 which are horizontally arranged, fixed ends of the second telescopic rods 42 penetrate through the stop plates 38 and are distributed in the groove bodies below, and telescopic ends of the second telescopic rods 42 extend upwards to penetrate through the groove bodies above and are fixedly connected with fixed blocks 40, and the fixed blocks 40 are in sliding fit with the groove bodies above; the movable end of the second telescopic rod 42 is sleeved with a second spring 47, the second spring 47 is used for driving the fixed block 40 and the stop plate 38 to be away from each other, when the fixed block 40 is pressed by a printing stock and has a downward movement trend, the movable end of the second telescopic rod 42 is contracted and moves into the groove above the groove, and the second spring 47 is compressed, so that the printing stock is in a tensioning state.

When the first pressing wheel 19 and the second pressing wheel 23 are pressed on the elastic frame 21, the printing mechanism 5 starts to perform a printing operation on the printing material, in this state, the winding roller 6 stops working, the printing material stops being conveyed forward, but the printing material on the unwinding roller 1 is continuously released from the unwinding roller 1 under the inertia action due to the inertia of the unwinding roller 1, so that the part of the printing material loses the tension, and after the printing is finished, the part of the printing material cannot be tightly wound on the winding roller 6 when the winding roller 6 works. In order to avoid the above situation, in this embodiment, the bottom of the fixed end of the second telescopic rod 42 is fixedly connected with the base 43, and the base 43 is connected with the lower groove body in a sliding manner, and the fixed end of the second telescopic rod 42 is also connected with the stop plate 38 in a sliding manner; when the first pressing wheel 19 and the arc-shaped supporting plate 32 are pressed on the elastic frame 21, the printing material stops being conveyed, at the same time, the second spring 47 in a compressed state returns to deformation, and the base 43 slides upwards in the vertical direction, so that the floating roller 41 tightens the printing material.

In order to drive the floating roller 41 to move upwards, in this embodiment, the roller support 2 on two sides of the guide roller 4 is rotatably connected with the fluted disc 8, the outer wall of the rack 48 is rotatably provided with the gear 9 meshed with the fluted disc 8, the second motor 30 connected with the gear 9 in a driving way is fixed in the rack 48, the fixed shaft 36 is fixed in the center of the fluted disc 8, the first telescopic rod 7 is fixedly sleeved on the circumferential surface of the fixed shaft 36, the movable end of the first telescopic rod 7 is connected with the limiting baffle 45, the sleeve 44 is rotatably sleeved at the position of the movable end of the first telescopic rod 7 close to the limiting baffle 45, the first spring 37 is sleeved between the sleeve 44 and the fixed end of the first telescopic rod 7, the circumferential surface of the sleeve 44 is fixedly provided with the rotary bushing 46, the rotary bushing 46 extends towards the direction of the base 43 and is rotatably connected to the outer wall of the base 43, in this embodiment, the fluted disc 8 is meshed with the gear 9 through the second motor 30 in a driving way, the first telescopic rod 7 is driven by the fixed shaft 36 to rotate in the opposite direction, the telescopic disc 8 drives the first telescopic rod 7 in the rotating process, the first telescopic rod 7 is driven by the fixed shaft 36 to rotate anticlockwise, the first telescopic rod 7 is driven by the fixed shaft 36, the first telescopic rod 7 in the rotating direction is in the opposite direction, and then the telescopic rod is in the state in the sliding state in the opposite direction to the base 43 is in the direction of the telescopic rod 43, and is in the telescopic state, and is in the telescopic state in the opposite direction.

In order to enable the floating roller 41 to immediately act when the first pressing wheel 19 and the second pressing wheel 23 are pressed onto the elastic frame 21, as shown in fig. 3 and 4, an infrared emitter 20 is mounted on any side of the first transmission block 17, an infrared receiving sensor 29 matched with the frame 48 is mounted on the frame 48 corresponding to the position of the infrared emitter 20, namely when the first pressing wheel 19 is pressed onto the elastic frame 21, the infrared rays emitted by the infrared emitter 20 can be received by the infrared receiving sensor 29, the infrared receiving sensor 29 is connected with the second motor 30 through an electric signal, and the electric signal is generated after the infrared receiving sensor 29 receives the infrared rays to control the second motor 30 to rotate, so that the floating roller 41 starts to move upwards. When the first pressing wheel 19 and the second pressing wheel 23 move along the conveying direction of the printing stock, the second motor 30 is always in a working state to drive the gear 9 to rotate rapidly, the diameter of the fluted disc 8 is far larger than that of the gear 9, so that the rotating speed of the fluted disc 8 is slower, the floating roller 41 slowly moves upwards to tension the printing stock, when the first pressing wheel 19 and the second pressing wheel 23 move to the other end of the elastic frame 21, after printing is finished, the first pressing wheel 19 and the second pressing wheel 23 return to the initial positions, at the moment, the infrared emitter 20 and the infrared receiving sensor 29 are not in the same horizontal plane, the infrared emitter 29 cannot receive infrared rays, the second motor 30 stops acting, the first telescopic rod 7 returns to the initial positions under the action of the first spring 37, in the process, the floating roller 41 slowly returns to the initial positions under the action of the first spring 37 and the second spring 47, and the tensioning force of the printing stock in the whole process is not greatly different from the initial tensioning force, and the winding uniformity of the rolling roller 6 is further ensured.

In the description of the present invention, the terms "first," "second," "another," "yet another" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. Printing equipment, including unreeling roller (1), straining device (3), direction roller (4), printing mechanism (5) and wind-up roll (6) that set gradually along stock direction of delivery, its characterized in that: the printing mechanism (5) comprises an elastic frame (21) fixed on a rack (48), a printing area (31) is formed at the bottom of the elastic frame (21), a printing object is positioned in the printing area (31) when passing through the printing mechanism (5), elastic inkpad (35) is filled in the elastic frame (21), a silk screen plate (34) is assembled at the bottom of the elastic frame (21) corresponding to the printing area (31), an arc-shaped elastic sheet (33) is arranged in the elastic frame (21) along the conveying direction of the printing object, the middle part of the arc-shaped elastic sheet (33) is upwards arranged in a protruding mode, arc-shaped supporting plates (32) are integrally formed at two ends of the inner wall of the elastic frame (21) corresponding to the arc-shaped elastic sheet (33), two ends of the arc-shaped elastic sheet (33) are inserted into grooves formed in the arc-shaped supporting plates (32), and movable spaces are reserved between the tail ends of the arc-shaped elastic sheet (33) and the inner grooves of the arc-shaped supporting plates (32) along the arc-shaped extending direction of the arc-shaped elastic sheet (33); a first pressing wheel (19) and a second pressing wheel (23) are respectively arranged above and below the elastic frame (21), the first pressing wheel (19) and the second pressing wheel (23) can synchronously move in opposite directions in the vertical direction to press the upper end face and the lower end face of the elastic frame (21), and the first pressing wheel (19) and the second pressing wheel (23) are pressed at one end of the elastic frame (21) and then move to the other end of the elastic frame (21) along the conveying direction of a printing stock;

the elastic frame (21) is fixed on the inner side of the frame (48) through a connecting rod (22) connected with the periphery of the elastic frame; the first pressing wheel (19) is rotatably mounted on a wheel frame (18) arranged above the first pressing wheel (19), a first transmission block (17) is fixed at two ends of the wheel frame (18) along the length direction of the wheel frame, the second pressing wheel (23) is rotatably mounted on the wheel frame (18) arranged below the second pressing wheel, a second transmission block (24) is fixed at two ends of the wheel frame (18) provided with the second pressing wheel (23), a mounting plate (14) is arranged above the wheel frame (18) provided with the first pressing wheel (19), a first motor (15) is mounted at the tops of two ends of the mounting plate (14) along the length direction of the mounting plate, a motor shaft of the first motor (15) downwards extends through the mounting plate (14) and then is fixedly sleeved with a threaded rod (16), the threaded rod (16) downwards extends through the first transmission block (17) and the second transmission block (24) and then is rotatably connected with the bottom of the frame (48), and the first transmission block (17) and the second transmission block (24) are respectively in threaded fit with the threaded rod (16);

the top of the mounting plate (14) is fixedly provided with a limit frame (13) along the length direction of the mounting plate, the inner side of the limit frame (13) is provided with a piston sliding block (28), either side of the top of the rack (48) along the conveying direction of a printing stock is fixedly provided with a rodless cylinder (10), a piston rod (11) of the rodless cylinder (10) is erected on the top of the rack (48) along the horizontal direction, and the piston rod (11) penetrates through the limit frame (13) and the piston sliding block (28) and is in sliding fit with the piston sliding block; the bottom of the threaded rod (16) is fixedly connected with a sliding block (25), a limiting groove (26) is formed at the bottom of the frame (48) corresponding to the sliding direction of the sliding block (25), a second guide rod (27) is fixed inside the limiting groove (26) along the groove length direction of the limiting groove, and the sliding block (25) is embedded into the limiting groove (26) and is sleeved on the second guide rod (27) in a sliding manner; the top of the frame (48) is positioned at two sides of the piston rod (11) and is also provided with first guide rods (12), and each first guide rod (12) penetrates through the limiting frame (13) and is connected with the limiting frame in a sliding fit manner;

the tensioning mechanism (3) comprises fixed blocks (40) arranged on two sides of the top of the U-shaped plate (39), a floating roller (41) is rotatably connected between the two fixed blocks (40), and printing stock output from the unreeling roller (1) is guided into the guide roller (4) through the floating roller (41); the U-shaped plate (39) is characterized in that grooves are formed in the side walls on two sides of the U-shaped plate (39) in the vertical direction, the tops of the grooves extend to the tops of the U-shaped plate (39), the grooves penetrate through the side walls of the U-shaped plate (39) in the width direction of the U-shaped plate (39), second telescopic rods (42) are arranged in the grooves in the vertical direction, the middle parts of the grooves are separated by stop plates (38) which are horizontally arranged to form two groove bodies, fixed ends of the second telescopic rods (42) penetrate through the stop plates (38) and then are distributed in the groove bodies on the lower side, and telescopic ends of the second telescopic rods (42) upwards extend through the groove bodies on the upper side and then are fixedly connected with fixed blocks (40), and the fixed blocks (40) are in sliding fit with the groove bodies on the upper side; the movable end of the second telescopic rod (42) is sleeved with a second spring (47), and the second spring (47) is used for driving the fixed block (40) and the stop plate (38) to be away from each other;

a base (43) is fixedly connected to the bottom of the fixed end of the second telescopic rod (42), the base (43) is in sliding connection with the lower groove body, and the fixed end of the second telescopic rod (42) is in sliding connection with the stop plate (38); when the first pressing wheel (19) and the arc-shaped supporting plate (32) are pressed on the elastic frame (21), the base (43) slides upwards along the vertical direction so that the floating roller (41) tensions a printing stock;

the roller support (2) of direction roller (4) both sides are gone up to rotate and are connected with fluted disc (8), rotate on the outer wall of frame (48) install with fluted disc (8) engaged with gear (9), the inside of frame (48) is fixed with second motor (30) that link to each other with gear (9) drive, the center department of fluted disc (8) is fixed with fixed axle (36), fixed first telescopic link (7) of cup jointing on the periphery of fixed axle (36), the expansion end-to-end connection of first telescopic link (7) has spacing baffle (45), the position department that the expansion end of first telescopic link (7) is close to spacing baffle (45) is rotated and is cup jointed sleeve pipe (44), cup joint first spring (37) between the stiff end of sleeve pipe (44) and first telescopic link (7), be fixed with rotation bush (46) on the periphery of sleeve pipe (44), rotation bush (46) extend towards the direction of base (43) and rotate and connect on its outer wall, through the anticlockwise rotatory base (43) makes upward movement.

2. A printing apparatus according to claim 1, wherein: an infrared emitter (20) is arranged on any side of the first transmission block (17), an infrared receiving sensor (29) matched with the infrared emitter (20) is arranged on the frame (48) at a position corresponding to the infrared emitter, and the infrared receiving sensor (29) is connected with the second motor (30) through an electric signal.

3. A printing method applied to a printing apparatus according to any one of claims 1-2, characterized in that: the method comprises the following steps:

the rolling roller (6) is used for rotating to drive a printing stock on the unreeling roller (1) to sequentially move on the tensioning mechanism (3), the guide roller (4) and the printing mechanism (5), and when the printing stock passes through the printing mechanism (5), the first pressing wheel (19) and the second pressing wheel (23) synchronously move in opposite directions until the first pressing wheel (19) is pressed on the upper end face of the elastic frame (21) and the second pressing wheel (23) is pressed on the back of the printing stock in the printing area (31), and at the moment, the rolling roller (6) stops rotating;

the first pressing wheel (19) and the second pressing wheel (23) move along the conveying direction of the printing stock, one end of the elastic frame (21) moves to the other end, the first pressing wheel (19) acts on the arc-shaped elastic sheet (33) to enable the arc-shaped elastic sheet (33) to squeeze the elastic ink paste (35) below the arc-shaped elastic sheet (33), the elastic ink paste (35) is tightly attached to the screen plate (34), the second pressing wheel (23) acts on the back of the printing stock to enable the back of the printing stock to be attached to the screen plate (34), and printing is completed through synchronous movement and matching of the first pressing wheel (19) and the second pressing wheel (23) on the elastic frame (21).