CN218054424U

CN218054424U - Silk screen printing character backing plate

Info

Publication number: CN218054424U
Application number: CN202221529068.5U
Authority: CN
Inventors: 何锦添; 林杰斌; 许明齐
Original assignee: Guangzhou Meadville Electronics Co ltd
Current assignee: Guangzhou Meadville Electronics Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-12-16
Anticipated expiration: 2032-06-16

Abstract

The utility model relates to a circuit board processing tool technical field provides a silk screen printing character backing plate, silk screen printing character backing plate includes: the backing plate body is used for supporting and placing the soft and hard combined plate; the first supporting block is arranged on the base plate body and used for supporting the soft board on the soft and hard combination board during silk printing. The utility model discloses in, before carrying out the silk screen printing, place the circuit board in the backing plate body to the mobile circuit board makes the first supporting block aim at the soft board on the circuit board, makes the circuit board accurate be fixed in on the silk screen printing character backing plate. At this moment, the first supporting block supports the soft board on the circuit board, and the height of the soft board is increased, the space between the soft board and the character screen printing plate is reduced, so that the characters are even in oil, ink traces are not deformed or are less in deformation, the character identification is clear, the character adhesion is firm, and the character is not easy to fall off.

Description

Silk screen printing character backing plate

Technical Field

The utility model relates to a circuit board processing tool technical field especially relates to a silk screen printing character backing plate.

Background

In the PCB printed circuit board, the conventional silk-screen printing equipment can perform silk-screen printing on the surface of a hard board or a soft board. However, as the manufacturing process of the rigid-flex board is mature, the character marks are designed on the rigid-flex board and the flexible board.

However, when the difference in height exists between the soft board and the hard board of the rigid-flexible board, specifically, the difference in height exceeds 0.1mm, the screen plate cannot contact the soft board with the central recess, so that the character ink spreads in the gap between the soft board and the screen plate, the characters on the soft board are not evenly printed, and the character marks are blurred.

In order to solve the problems in the process, character jet printing is also adopted as a processing process. In the processing process, the character jet printing machine directly jet prints characters without being influenced by height difference. However, because the ink used in the character jet printing process is UV curing ink, the process problem of silk-screen printing of characters with difference in height is solved, and meanwhile, in the process of manufacturing templates in small batches, the material cost of films, printing screens and the like required by the traditional silk-screen printing is saved. However, since the soft board material is mostly PI/Cavity and the like, the surface is relatively smooth, and the UV curing ink used in the character jet printing process is UV cured in a short time in the character jet printing process, the bonding force between the jet printing ink and the smooth soft board material is poor, and the quality problem of character falling is more likely to occur compared with the thermal curing type silk-screen character ink.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a silk screen printing character backing plate to print characters on the soft board of the rigid-flex board of solving the prior art and have the technical problem of blurring, falling off easily.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

the utility model provides a silk screen printing character backing plate, silk screen printing character backing plate includes:

the backing plate body is used for supporting and placing the soft and hard combined plate;

the first supporting block is arranged on the base plate body and used for supporting the soft board on the rigid-flexible printed circuit board during silk printing.

Optionally, the height of the first support block is H, and the difference between the heights of the hard board and the soft board of the rigid-flex board is Δ H, H = Δ H + H, where H is the compensation height.

Optionally, h is greater than 0mm and less than 0.1mm.

Optionally, the first support block is provided with a clearance groove for avoiding the plated through hole.

Optionally, the shape of the first support block is adapted to the shape of a soft board on the rigid-flex board or adapted to the shape of a silk-screen area

Optionally, the silk screen printing character backing plate further comprises a second supporting block, and the second supporting block is arranged at the edge of the backing plate body and used for guiding glue scraping.

Optionally, at least four second supporting blocks are arranged on the shim plate body, the at least four second supporting blocks correspond to four sides of the shim plate body one to one, and the second supporting blocks are arranged along the edge of the shim plate body.

Optionally, the backing plate body is provided with a hanging nail hole;

the silk screen printing character backing plate further comprises a positioning piece, the positioning piece penetrates through the nail hanging hole, the positioning piece is provided with a first positioning end, and the first positioning end of the positioning piece is exposed out of the first side face of the backing plate body and is used for being matched with the rigid-flexible printed circuit board in a positioning mode.

Optionally, the positioning element has a second positioning end, and the second positioning end of the positioning element is exposed out of the second side surface of the base plate body and is used for being matched with the screen printing mold in a positioning manner.

Optionally, the first locating end is flat.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses in, before carrying out the silk screen printing, place the circuit board in the backing plate body to the mobile circuit board makes the first supporting block aim at the soft board on the circuit board, makes the circuit board accurate be fixed in on the silk screen printing character backing plate. At this moment, the soft board on the first supporting block supporting circuit board to make the high promotion of soft board, reduce the interval of soft board and character half tone, thereby make under the character oil even, printing ink vestige inde not warp or warp fewly, the character sign is clear, the character adhesion is firm, is difficult for droing.

Drawings

FIG. 1 is a state diagram of circuit board silk-screen printing of characters

Fig. 2 is a schematic view of the silk-screen character backing plate of the present invention;

fig. 3 is the schematic diagram of the silk-screen character pad plate during silk-screen printing of the utility model.

In the figure:

1. a base plate body; 11. hanging nail holes;

2. a first support block;

3. a second support block;

4. a positioning member; 41. a first positioning end; 42. a second positioning end;

5. a circuit board; 51. a soft board; 52. a hard plate; 521. positioning holes;

6. character screen printing plate; 61. and (3) printing ink.

Detailed Description

The present invention will be further described with reference to fig. 1 to 3 and the detailed description thereof, and it should be noted that the embodiments described below or various technical features can be arbitrarily combined to form a new embodiment without conflict.

In the screen printing process of the flexible board 51 of the rigid-flex board, character marks are printed on the surface thereof. As shown in fig. 1, in the rigid-flex board, there is a height difference between the rigid board 52 and the flexible board 51, and in an actual screen printing process, since the height difference exceeds 0.1mm or more, the distance between the character screen 6 and the flexible board 51 is large, and the character screen 6 cannot contact the area of the flexible board 51 with a concave middle and has a large distance, so that the characters in the area of the flexible board 51 are not uniformly filled with ink, the traces of the ink 61 are deformed, and the character marks are blurred. As shown in fig. 1, the ink 61 on the hard plate 52 is uniform in thickness, and the ink 61 on the soft plate 51 is deformed to be thicker than the hard plate 52, resulting in a change in character sharpness. When characters are printed in a jet printing mode, the soft board 51 is mostly made of PI/Cavity materials, the surface is smooth, and the characters fall off. The circuit board 5 is hereinafter embodied as a flex-hard board

The embodiment of the utility model provides a silk screen printing character backing plate, as shown in fig. 2, fig. 3, silk screen printing character backing plate includes backing plate body 1 and first supporting block 2 (have the first supporting block 2 of a plurality of displays in fig. 2, exemplarily identify one of them first supporting block 2 in the picture). The base plate body 1 is used for supporting and placing the circuit board 5, and is used for supporting and fixing the circuit board 5 when silk-screen characters are printed. The first supporting block 2 is arranged on the backing plate body 1, and the first supporting block 2 protrudes out of the backing plate body 1. Before silk-screen printing, the circuit board 5 is placed on the base plate body 1, and the circuit board 5 is moved, so that the first supporting blocks 2 are aligned to the soft board 51 on the circuit board 5, and the circuit board 5 is accurately fixed on the silk-screen character base plate. At this time, as shown in fig. 3, the first support block 2 supports the flexible board 51 on the circuit board 5, and the height of the flexible board 51 is increased, so that the distance between the flexible board 51 and the character screen 6 is reduced, and thus, the characters are uniformly filled with oil, the traces of the ink 61 are not deformed or are less deformed, the character marks are clear, the characters are firmly adhered, and the characters are not easy to fall off.

Further, the height of the first support block 2 is H, and the height difference between the hard board 52 and the soft board 51 of the circuit board 5 is Δ H, H = Δ H + H, where H is the compensation height. The soft board 51 and the hard board 52 have production design tolerance, the soft board 51 is made of soft material and is easy to generate micro thickness variation, in addition, the soft board 51 is supported by the first supporting block 2 during silk-screen printing to generate deformation, which also can cause special thickness variation, at least based on the guidance, the first supporting block 2 compensates the height difference between the hard board 52 and the soft board 51 to be delta H, and also compensates the special thickness variation by the compensation height H, so that the height of the soft board 51 is higher than that of the hard board 52, and the specific height range is 0-0.05 mm.

Further, h is greater than 0mm and less than 0.1mm.

The height difference between the hard board 52 and the soft board 51 specifically refers to the thickness difference between the hard board 52 and the soft board 51.

In some embodiments, the flexible board 51 is designed with a plated through hole to avoid the problem that the flexible board 51 is pressed by the first support block 2 during the screen printing process and thus the flexible board is damaged by the pressure. When the first supporting block 2 is arranged, the first supporting block 2 with the area of the plated through hole is eliminated; when the areas of some soft boards 51 are large and the soft boards 51 need to print characters, hollowing out the first supporting block 2, specifically, arranging a clearance groove for avoiding the plated through hole on the first supporting block 2; or the area of the first supporting block 2 is reduced to be matched with the silk-screen area, so that the first supporting block 2 is prevented from being plated with the through holes.

As to the shape of the first support block 2, it may be specifically adapted to the shape of the flexible board 51 on the circuit board 5 or to the shape of the silk-screen area.

In some embodiments, the silk-screen character backing plate further comprises a second supporting block 3, and the second supporting block 3 is arranged at the edge of the backing plate body 1 for guiding the glue scraping. During screen printing, a scraper is used for scraping off the excessive ink 61. In the embodiment, the second supporting block 3 is additionally arranged to guide the frictioning, and in the processes of lower cutting and retracting of silk-screen frictioning, under the height limitation and the guide of the second supporting block 3, the silk-screen pressure generated by the scraper is uniform, the thickness of the printing ink 61 is uniform,

specifically, the backing plate body 1 is provided with at least four second supporting blocks 3, the at least four second supporting blocks 3 are arranged in one-to-one correspondence with four sides of the backing plate body 1, and each second supporting block 3 is arranged along the edge of the backing plate body 1.

In some embodiments, the pad body 1 is provided with a peg hole 11. The silk-screen character backing plate further comprises a positioning piece 4, the positioning piece 4 penetrates through the nail hanging hole 11, the positioning piece 4 is provided with a first positioning end 41, and the first positioning end 41 of the positioning piece 4 is exposed out of the first side face of the backing plate body 1 and is used for being matched with the circuit board 5 in a positioning mode. The positioning piece 4 is fixed on the backing plate body 1, meanwhile, the first positioning end 41 protrudes out of the backing plate body 1, and during silk-screen printing, the first positioning end 41 is embedded into the positioning hole 521 on the circuit board 5, so that the circuit board 5 is positioned, the mounting accuracy of the circuit board 5 is improved, and silk-screen printing deviation is avoided.

The first positioning end 41 is flat, so that the area of the first positioning end 41 is enlarged, and when the circuit board 5 is fixed, the cross section of the first positioning end 41 and the circuit board 5 can be adhered by using an adhesive tape to fix the circuit board 5. The first positioning end 41 is flat, so that the area of the cross section is larger, and the fixing effect of the adhesive tape on the circuit board 5 is improved.

Furthermore, the positioning element 4 has a second positioning end 42, and the second positioning end 42 of the positioning element 4 is exposed out of the second side surface of the pad body 1 for positioning and matching with the screen printing mold.

In two months, the height of the protrusion of the first positioning end 41 is 0.25mm, and the height of the protrusion of the second positioning end 42 is 0.25mm.

In particular, the positioning element 4 may be a pin, a dowel.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a silk screen printing character backing plate, its characterized in that, silk screen printing character backing plate includes:

2. The silk-screen character pad as claimed in claim 1, wherein the height of the first supporting block is H, the height difference between the hard board and the soft board of the soft-hard combination board is Δ H, H = Δ H + H, where H is a compensation height.

3. The silk-screen character pad of claim 2, wherein h is greater than 0mm and less than 0.1mm.

4. The silk-screen character pad as claimed in claim 1, wherein the first support block is provided with a clearance groove for avoiding the plated through hole.

5. The silk-screen character backing plate as claimed in claim 1, wherein the shape of the first supporting block is adapted to the shape of a soft plate on the rigid-flex board or adapted to the shape of a silk-screen area.

6. The silk-screen character pad of claim 1, further comprising a second support block disposed at an edge of the pad body for guiding a squeegee.

7. The silk-screen character blanket of claim 6 wherein said blanket body is provided with at least four of said second support blocks, said at least four of said second support blocks being disposed in one-to-one correspondence with four sides of said blanket body, each of said second support blocks being disposed along an edge of said blanket body.

8. The silk-screen character backing plate of claim 1, wherein the backing plate body is provided with hanging nail holes;

9. The silk-screen character pad as claimed in claim 8, wherein the positioning member has a second positioning end, and the second positioning end of the positioning member is exposed out of the second side surface of the pad body for positioning and matching with the silk-screen mold.

10. The silk-screen character backing plate of claim 8, wherein said first locating end is flat.