CN213947782U

CN213947782U - Screen printing machine

Info

Publication number: CN213947782U
Application number: CN202022395161.9U
Authority: CN
Inventors: 顾锦源; 唐伟
Original assignee: Wuxi Haiboyuan Packaging Technology Co ltd
Current assignee: Wuxi Haiboyuan Packaging Technology Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-08-13
Anticipated expiration: 2030-10-23

Abstract

The application relates to a screen printer, which comprises a printing workbench and a printing mechanism, wherein the printing mechanism is arranged on the printing workbench; the printing mechanism comprises a sliding assembly, a scraper assembly and a mask, and the mask is arranged on the printing workbench; the sliding assembly is fixedly arranged on the printing workbench and positioned on one side of the mask; the scraper component is connected with the sliding component and is positioned above the mask; the mask includes an upper frame, a lower frame, and a screen; the silk screen is arranged on the lower surface of the lower frame, the upper frame and the lower frame are connected through the elastic assembly, the lower frame can move along the vertical direction, and the elastic assembly applies vertical upward pulling force to the lower frame in a natural state, so that the lower surface of the upper frame is attached to the upper surface of the lower frame; when the lower frame moves vertically downward, the lower frame can move until the screen abuts against the printing table. The application has the effect of improving the printing quality.

Description

Screen printing machine

Technical Field

The application relates to the field of screen printing technology, in particular to a screen printing machine.

Background

The screen printing machine is a machine for printing by using screen printing plate, belonging to a kind of printing machine. A screen printer is a machine that prints characters and images, and is a generic name of a machine or apparatus for producing printed matters. The screen printing machine belongs to the representative printing equipment in the porous printing machine, and the material for manufacturing the screen can be nylon wire, copper wire, steel wire or stainless steel wire besides real silk. And can be classified into a flat screen printer, a curved screen printer, a rotary screen printer, and the like.

If the chinese patent with the granted publication number CN206351584U discloses a screen printing machine, which comprises a frame, a conveying mechanism, a printing system and a winding mechanism, wherein the printing system comprises a screen printing plate and a scraper assembly, the scraper assembly comprises a scraper, a return-ink knife and a driving cylinder, a knife rest i is arranged above the scraper, one side of the knife rest i, which is far away from the return-ink knife, is provided with an ink-stirring mechanism for stirring ink at two ends of the screen printing plate along the conveying direction of a printing stock, the ink-stirring mechanism comprises a connecting rod fixedly connected with the knife rest i and an ink-stirring plate fixedly connected with one end of the connecting rod, which is far away from the knife rest, and when the knife rest is lowered to the lowest position, the ink-stirring plate is abutted against the screen printing plate; and a second knife rest is arranged on the ink returning knife, and an ink poking mechanism with the same structure is arranged on one side of the second knife rest, which is far away from the first knife rest.

In view of the above-mentioned related art, the inventor believes that, in the process of the doctor blade moving downward to abut against the screen printing plate and pressing the screen printing plate downward until the screen printing plate contacts with the paper to be printed to complete printing, the part of the screen printing plate close to the frame of the screen printing plate is pressed by the doctor blade to a different extent than the middle part of the screen printing plate, so that the printing effect is different in depth, and the printing quality problem exists.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem of the printing quality of screen printing machine, this application provides a screen printing machine.

The application provides a screen printer adopts following technical scheme:

a screen printer comprises a printing workbench and a printing mechanism, wherein the printing mechanism is arranged on the printing workbench; the printing mechanism comprises a sliding assembly, a scraper assembly and a mask, and the mask is arranged on a printing workbench; the sliding assembly is fixedly arranged on the printing workbench and positioned on one side of the mask; the scraper component is connected with the sliding component and is positioned above the mask; the mask includes an upper frame, a lower frame, and a screen; the silk screen is arranged on the lower surface of the lower frame, the upper frame and the lower frame are connected through the elastic assembly, the lower frame can move along the vertical direction, and the elastic assembly applies vertical upward pulling force to the lower frame in a natural state, so that the lower surface of the upper frame is attached to the upper surface of the lower frame; when the lower frame moves vertically downward, the lower frame can move until the screen abuts against the printing workbench.

Through adopting above-mentioned technical scheme, adopt elastic component to make scraper subassembly push down the silk screen and drive the underframe and move down, the scraps of paper of printing are treated in the underframe butt for each position of silk screen is close each other by the extruded degree of ink scraping sword, improves the printing effect, improves the printing quality.

Optionally, a rubber pad is arranged on the lower surface of the frame of the silk screen, which is opposite to the lower frame.

By adopting the technical scheme, the rubber pad is arranged on the lower surface of the frame of the lower frame, which is just opposite to the screen position, so that the possibility that the lower frame extrudes the paper sheets to be printed to generate indentations in the downward movement process is reduced.

Optionally, the elastic assembly comprises an elastic piece and a sliding piece; the bottom surface of the upper frame is provided with a sliding groove; the top surface of the lower frame is fixedly connected with a sliding piece extending into the sliding groove, and the sliding piece can slide in the sliding groove along the vertical direction; the top of the sliding piece is vertically connected with an elastic piece, and one end, far away from the sliding piece, of the elastic piece is fixedly connected with the bottom wall of the sliding groove.

Through adopting above-mentioned technical scheme, the slider can drive the lower frame downstream in the sliding tray is slided downwards thereby makes the lower frame can butt the scraps of paper of waiting to print.

Optionally, the sliding groove is a square annular groove formed along the circumferential direction of the upper frame; the sliding piece is an annular block matched with the sliding groove.

Through adopting above-mentioned technical scheme, the slider just in time stretches into the sliding tray, thereby the annular block moves along vertical direction and can more stable so that the motion of underframe is more stable in the sliding tray.

Optionally, a cushion pad is disposed on a lower surface of the upper frame.

Through adopting above-mentioned technical scheme, at the lower surface configuration blotter of upper ledge, after accomplishing the printing and the underframe rebound returns to the in-process with the upper ledge butt, the process that the blotter gave upper ledge and underframe butt plays the cushioning effect, alleviates to cause printing ink to splash because of the underframe returns.

Optionally, the inner side wall of the upper frame and the inner side wall of the lower frame are connected with an elastic membrane together, and the elastic membrane covers a gap between the inner side wall of the upper frame and the inner side wall of the lower frame.

Through adopting above-mentioned technical scheme, cover the elasticity membrane on the inside wall of upper ledge's inside wall and the inside wall of underframe, reduce because of the too much possibility that leaks in the gap of upper ledge and underframe of printing ink.

Optionally, the scraper assembly comprises a first double-rod cylinder, a second double-rod cylinder, a scraping blade and a return blade; two piston rods of the first double-rod cylinder are connected with a doctor blade; two piston rods of the second double-rod cylinder are connected with an ink return knife; the two ends of the ink return blade are inclined to form one ink pushing plate, the two ink pushing plates and the ink return blade form an obtuse angle, and the inclined planes of the two ink pushing plates face the ink scraping blade.

Through adopting above-mentioned technical scheme, through setting up ink stirring board at ink return blade both ends, can collect the printing ink that overflows the doctor blade both ends when printing together.

Optionally, a dust removal assembly is installed at one end, close to the scraper assembly, of the printing workbench.

Through adopting above-mentioned technical scheme, be close to the one end installation dust removal subassembly of scraper subassembly at the printing workstation, improve and block up the printing quality problem that the silk screen arouses because of the dust gets into.

Optionally, the dust removing assembly comprises a first dust removing cylinder and a second dust removing cylinder; the first dust removing cylinder and the second dust removing cylinder are horizontally arranged, and are sequentially arranged in the vertical direction.

By adopting the technical scheme, the paper sheets to be printed pass between the two dust removing cylinders, and the paper sheets to be printed can be subjected to dust removal.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the elastic component is adopted to enable the scraper component to press the silk screen downwards to drive the lower frame to move downwards, the lower frame is abutted against paper sheets to be printed, so that the extrusion degree of each part of the silk screen by the scraper is close to each other, the printing effect is improved, and the printing quality is improved;

2. the buffer cushion is arranged on the lower surface of the upper frame, so that the buffer cushion plays a role in buffering the process that the upper frame is abutted with the lower frame in the process that the lower frame moves upwards and returns to be abutted with the upper frame after printing is finished, and ink splashing caused by the return of the lower frame is relieved;

3. the elastic films are arranged on the inner wall of the upper frame and the inner wall of the lower frame together, so that the possibility of leakage of ink from gaps of the upper frame and the lower frame due to excessive ink is reduced.

Drawings

Fig. 1 is a schematic view of the overall configuration of a screen printer according to an embodiment of the present application.

Fig. 2 is a schematic view of a screen printer according to an embodiment of the present application.

Fig. 3 is an exploded view of the mask shown in fig. 1.

Figure 4 is a schematic diagram of a slide assembly and doctor assembly embodied in an embodiment of the present application.

Description of reference numerals: 1. a printing workbench; 2. a printing mechanism; 3. a sliding assembly; 4. a scraper assembly; 5. a mask; 6. an upper frame; 7. a lower frame; 8. a wire mesh; 9. an elastic component; 10. a slider; 11. an elastic member; 12. a sliding groove; 13. an elastic film; 14. a cushion pad; 15. a rubber pad; 16. a guide block; 17. a cover plate; 18. a base; 19. a paper inlet; 20. a rodless cylinder; 21. a first double-rod cylinder; 22. a second double rod cylinder; 23. a slider; 24. a bolt; 25. connecting blocks; 26. a doctor blade; 27. returning the ink knife; 28. ink poking plate; 29. a dust removal assembly; 30. a first dust removal cylinder; 31. and a second dust removing cylinder.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a screen printing machine.

Referring to fig. 1, the screen printing machine includes a printing table 1 and a printing mechanism 2, the printing mechanism 2 being mounted on the printing table 1, the printing mechanism 2 being composed of a slide assembly 3, a squeegee assembly 4, and a mask 5. The mask 5 is installed on the top surface of the printing workbench 1, the sliding component 3 is installed on the top surface of the printing workbench 1 and is positioned on one side of the mask 5, and the scraper component 4 is connected with the sliding component 3 and is positioned above the mask 5.

Referring to fig. 2, the mask 5 is composed of an upper frame 6, a lower frame 7, and a screen 8, and the screen 8 is mounted on a lower surface of the lower frame 7. During printing operation, the scraper component 4 moves downwards to abut against the silk screen 8 until the silk screen 8 contacts with paper sheets to be printed, and the sliding component 3 drives the scraper component 4 to move so that the scraper component 4 extrudes ink, and the ink is printed on the paper sheets to be printed according to patterns on the silk screen 8.

Referring to fig. 3, the upper frame 6 and the lower frame 7 are connected by an elastic assembly 9 and the lower frame 7 can move in a vertical direction, the elastic assembly 9 includes a sliding member 10 and a plurality of elastic members 11. The bottom end of the upper frame 6 is provided with a square annular sliding groove 12 along the circumference of the upper frame 6, the sliding member 10 is fixedly connected to the upper surface of the lower frame 7, and the sliding member 10 is an annular block inserted into the sliding groove 12 and matched with the sliding groove 12 in shape. The slider 10 can slide in the sliding groove 12 in the vertical direction, and all the elastic pieces 11 are arranged between the top end of the slider 10 and the bottom wall of the sliding groove 12; specifically, the elastic members 11 are springs with the same elastic limit, one end of each elastic member 11 is fixedly connected to the bottom wall of the sliding groove 12, and the other end is fixedly connected to the upper surface of the sliding member 10.

Referring to fig. 3, a stretchable elastic film 13 is attached to both the inner side wall of the upper frame 6 and the inner side wall of the lower frame 7, and the elastic film 13 is made of latex and can be restored to its original shape after the elastic film 13 is stretched within a certain limit. The elastic film 13 covers a gap between the inner side wall of the upper frame 6 and the inner side wall of the lower frame 7 so that ink does not leak from the gap. Naturally, the elastic member 11 applies an upward pulling force to the slider 10, so that the lower surface of the upper frame 6 is brought into abutment with the upper surface of the lower frame 7. A cushion pad 14 is adhered to the lower surface of the upper frame 6, and the cushion pad 14 plays a role of buffering when the elastic member 11 vertically pulls the lower frame 7 upward to make the lower surface of the upper frame 6 and the upper surface of the upper frame 6 fit with each other. The lower surface of the screen 8 is provided with a rubber pad 15 opposite to the frame of the lower frame 7, the screen 8 is abutted against the paper to be printed, the friction force between the screen 8 and the paper to be printed is increased through the rubber pad 15, and the possibility of slight movement of the paper to be printed is reduced.

Referring to fig. 2, one guide block 16 is disposed on each side of the mask 5, an upper surface of each guide block 16 is flush with an upper surface of the upper frame 6, and the two guide blocks 16 are fixedly mounted on the printing table 1. A printing channel is formed between the two guide blocks 16, the silk screen 8 and the printing workbench 1, one end of the printing channel close to the scraper component is a paper inlet 19, and the other end is a paper outlet. The side walls of the upper frame 6 and the lower frame 7 which are positioned on the same side are attached to the side walls of the corresponding guide blocks 16, the upper surfaces of the frames corresponding to the two side walls of the upper frame 6 attached to the guide blocks 16 are fixedly connected with cover plates 17, each cover plate 17 is installed on the top end of the corresponding guide block 16, and each cover plate 17 is fixed to the corresponding guide block 16 through a plurality of bolts 24.

Referring to fig. 2, the slide assembly 3 includes a base 18 and a rodless cylinder 20. The base 18 is fixedly installed on the printing workbench 1, the base 18 is located on one side of one of the guide blocks 16 and is abutted against the guide block 16, the rodless cylinder 20 is arranged along the length direction of the base 18 and is fixedly connected to the top of the base 18, and the sliding block 23 of the rodless cylinder 20 can move along the length direction of the base 18. The upper surface of the slider 23 of the rodless cylinder 20 is provided with a connecting block 25, and specifically, one end of the connecting block 25 is fixedly connected with the upper surface of the slider 23, and the other end of the connecting block 25 extends to the upper side of the mask 5 and is connected to the scraper assembly 4

Referring to fig. 4, the doctor assembly 4 includes a first dual rod cylinder 21, a second dual rod cylinder 22, a doctor blade 26, and a return blade 27. The first double-rod cylinder 21 and the second double-rod cylinder 22 are both vertically arranged and are both connected to one end, far away from the sliding block 23, of the connecting block 25. The first double-rod cylinder 21 and the second double-rod cylinder 22 are arranged in this order along the longitudinal direction of the base 18, and with reference to fig. 2, the first double-rod cylinder 21 is closer to the paper feed port 19 than the second double-rod cylinder 22. Two piston rods of the first double-rod cylinder 21 are connected with a doctor blade 26, and the doctor blade 26 can move in the vertical direction; two piston rods of the second double-rod cylinder 22 are connected with an ink return blade 27, and the ink return blade 27 can move in the vertical direction. The doctor blade 26 and the return blade 27 are rectangular plates. The two ends of the length direction of the ink return blade 27 are obliquely provided with an ink stirring plate 28, an obtuse angle is formed between each ink stirring plate 28 and the ink return blade 27, and the inclined surfaces of the two ink stirring plates 28 face the ink scraping blade 26.

Referring to fig. 2, the printing table 1 is provided with a dust removing assembly 29 at an end thereof adjacent to the doctor assembly 4. The dust removing assembly 29 comprises a first dust removing cylinder 30 and a second dust removing cylinder 31, the first dust removing cylinder 30 and the second dust removing cylinder 31 are both installed at one end, close to the paper inlet 19, of the printing workbench 1, the first dust removing cylinder 30 and the second dust removing cylinder 31 are arranged in the vertical direction, the first dust removing cylinder 30 is located above the second dust removing cylinder 31, and paper sheets to be printed pass through between the first dust removing cylinder 30 and the second dust removing cylinder 31.

The implementation principle of the screen printing machine in the embodiment of the application is as follows:

in the paper feeding process, after the paper to be printed passes through the first dust removing cylinder 30 and the second dust removing cylinder 31, the paper enters the lower part of the mask 5 through the paper inlet 19, and dust removal before printing operation is realized.

During printing operation, the first double-rod cylinder 21 drives the doctor blade 26 to move downwards, the doctor blade 26 presses the screen 8, and the screen 8 drives the lower frame 7 to vertically move downwards until the screen 8 abuts against a paper sheet to be printed. When the screen 8 abuts against the paper to be printed, the rodless cylinder 20 drives the first double-rod cylinder 21 to slide, and the doctor blade 26 presses the ink to print the ink on the paper to be printed through the screen 8.

After printing is completed, the first double-rod cylinder 21 retracts the doctor blade 26, the second double-rod cylinder 22 drives the ink returning blade 27 to move downwards to abut against the silk screen 8, and the rodless cylinder 20 drives the second double-rod cylinder 22 to return to the initial position. During the process that the rodless cylinder 20 drives the second double-rod cylinder 22 to return to the initial position, the ink returning blade 27 scrapes the ink back to the initial position. Subsequently, the ink return blade 27 is retracted by the second double-rod cylinder 22. At this time, the upper surface of the screen 8 loses the abutting force due to the ink recovery blade 27 being recovered. Therefore, the lower frame 7 is moved upward by the elastic force of the elastic member 11 to be in abutment with the lower surface of the upper frame 6.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A screen printer comprises a printing workbench (1) and a printing mechanism (2), wherein the printing mechanism (2) is arranged on the printing workbench (1); the printing mechanism (2) comprises a sliding assembly (3), a scraper assembly (4) and a mask (5), and the mask (5) is arranged on the printing workbench (1); the sliding assembly (3) is fixedly arranged on the printing workbench (1) and is positioned on one side of the mask (5); the scraper component (4) is connected with the sliding component (3) and is positioned above the mask (5); the method is characterized in that: the mask (5) comprises an upper frame (6), a lower frame (7) and a screen (8); the silk screen (8) is arranged on the lower surface of the lower frame (7), the upper frame (6) and the lower frame (7) are connected through the elastic assembly (9), the lower frame (7) can move along the vertical direction, and the elastic assembly (9) applies a vertical upward pulling force to the lower frame (7) in a natural state, so that the lower surface of the upper frame (6) is attached to the upper surface of the lower frame (7); when the lower frame (7) moves vertically downward, the lower frame (7) can move until the screen (8) abuts against the printing table (1).

2. The screen printing machine according to claim 1, wherein: and a rubber pad (15) is arranged on the lower surface of the screen (8) opposite to the frame of the lower frame (7).

3. The screen printing machine according to claim 1, wherein: the elastic assembly (9) comprises an elastic piece (11) and a sliding piece (10); the bottom surface of the upper frame (6) is provided with a sliding groove (12); the top surface of the lower frame (7) is fixedly connected with a sliding piece (10) extending into a sliding groove (12), and the sliding piece (10) can slide in the sliding groove (12) along the vertical direction; the top of the sliding piece (10) is vertically connected with an elastic piece (11), and one end, far away from the sliding piece (10), of the elastic piece (11) is fixedly connected with the bottom wall of the sliding groove (12).

4. A screen printing machine according to claim 3, wherein: the sliding groove (12) is a square annular groove which is arranged along the circumferential direction of the upper frame (6); the sliding piece (10) is an annular block matched with the sliding groove (12).

5. The screen printing machine according to claim 1, wherein: the lower surface of the upper frame (6) is provided with a cushion pad (14).

6. The screen printing machine according to claim 1, wherein: the inner side wall of the upper frame (6) and the inner side wall of the lower frame (7) are connected with an elastic membrane (13) together, and the elastic membrane (13) covers a gap between the inner side wall of the upper frame (6) and the inner side wall of the lower frame (7).

7. The screen printing machine according to claim 1, wherein: the scraper assembly (4) comprises a first double-rod cylinder (21), a second double-rod cylinder (22), a scraping blade (26) and a return blade (27); two piston rods of the first double-rod cylinder (21) are connected with a doctor blade (26); two piston rods of the second double-rod cylinder (22) are connected with an ink return knife (27); both ends of the ink return blade (27) are obliquely provided with one ink stirring plate (28), an obtuse angle is formed between each ink stirring plate (28) and the ink return blade (27), and the inclined surfaces of the two ink stirring plates (28) face the ink scraping blade (26).

8. The screen printing machine according to claim 1, wherein: and a dust removal assembly (29) is arranged at one end, close to the scraper assembly (4), of the printing workbench (1).

9. The screen printing machine according to claim 8, wherein: the dust removal assembly (29) comprises a first dust removal cylinder (30) and a second dust removal cylinder (31); the first dust removing cylinder (30) and the second dust removing cylinder (31) are horizontally arranged, and the first dust removing cylinder (30) and the second dust removing cylinder (31) are sequentially arranged in the vertical direction.