CN204278721U - For the tool of silk-screen character - Google Patents

Abstract

A jig for silk screen characters, including an operation table, a limit block fixed in the middle of the upper end surface of the operation table, and an air pump connected to the suction cavity, the limit block is detachably fixed on the operation table According to the size of the window area of the PCB board, the limit blocks of different sizes can be replaced. The operation table is provided with a fixed area to place the PCB board. The holes are distributed in different positions corresponding to the corners and the middle of the PCB board in the fixed area. The air pump is connected to the suction hole. The PCB board is placed on the fixed area of the console, and the air pump generates negative pressure above the console through the suction hole. , so that the PCB board is fixed on the fixed position, and the limit block on the operation table extends into the window area under the PCB board and touches against the bottom of the silk screen area to ensure that the silk screen area is evenly stressed during silk screen printing, and the quality of the screen printing is ensured. Air pump Create negative pressure above the operating table to fix the PCB board and effectively prevent the PCB board from shaking.

Description

Jigs for silk screen characters

technical field

The utility model relates to a device for assisting silk screen printing of PCB boards, in particular to a jig used for silk screen printing characters on height difference positions of PCB boards.

Background technique

The traditional rigid-flex PCB silk screen characters are on the same plane as the board body, and the previous flat screen printing method can basically meet the production needs. However, with the development of science and technology and the advancement of board-making technology, the requirements for PCB boards are getting higher and higher, and the silk screen position of PCB boards is becoming more and more stringent, especially for camera rigid-flex boards that require more flexible window openings. It is small and needs to be silk-screened near the rigid-flexible area at the same time. Due to the silk-screening inside the window-opening area where the upper and lower sides are opened at the same time, the flexible area is not stressed, and the traditional silk-screening method may easily cause the characters to be unclear.

In order to solve the problem of uneven force in the window opening area, the current industry mainly adopts the method of printing characters. However, the method of printing characters is expensive, which increases the burden on the enterprise, increases the production cost of the enterprise, and reduces the profit margin.

Utility model content

Therefore, the purpose of this utility model is to provide a kind of fixture that is used for silk-screen printing character that guarantees uniform force during silk-screen printing of PCB board and improves silk-screen printing quality.

A fixture for silk screen characters, used for silk screen printing with a PCB board, the upper and lower end surfaces of the flexible layer of the PCB board are provided with oppositely arranged window areas, and a silk screen area is formed between the two window areas for use in The fixture for silk screen characters includes an operating table, a limit block fixed in the middle of the upper end surface of the operating table, and an air pump connected to the suction cavity. The limiting block is detachably fixed on the operating table to The limit blocks of different sizes are replaced according to the size of the window area of the PCB board. The operating table is provided with a fixed area to place the PCB board. The operating table is provided with a number of suction holes penetrating up and down in the fixed area. The air holes are distributed in different positions corresponding to the corners and the middle of the PCB board in the fixed area, the air pump is connected to the air suction hole, the PCB board is placed on the fixed area of the console, and the air pump operates through the air suction hole Negative pressure is generated above the table, so that the PCB board is fixed on the fixed position, and the limit block on the operation table extends into the window area below and abuts against the bottom of the silk screen area.

Further, it also includes an air suction chamber, the operating table cover is arranged on the air suction chamber, and the air pump communicates with the air suction hole through the air suction chamber.

Further, the air suction cavity has a hollow structure, and an opening is provided at the upper end of the air suction cavity, and the opening communicates with the hollow interior of the air suction cavity and the outside outside the opening, and the operating table cover is arranged above the opening , the fixed area of the operating table is set up and down opposite to the opening.

Further, the air pump is connected to the internal hollow structure of the suction cavity through a pipeline, and the air pump generates negative pressure above the operation table through the suction cavity and the suction holes communicated with the suction cavity

Further, the air pump communicates with the suction hole through a pipeline.

Further, the limit block is made of PI material.

To sum up, the fixture for silk screen characters of this utility model is equipped with a limit block on the operating table to push up the screen printing area, so as to ensure uniform force during silk screen printing in the screen printing area and improve the quality of silk screen printing. In addition, an air pump is used to make the screen printing Negative pressure is generated above the operating table to fix the PCB board, effectively prevent the PCB board from shaking, and further improve the quality of the silk screen.

Description of drawings

FIG. 1 is a schematic structural view of an embodiment of a jig for silk screen characters of the present invention.

Fig. 2 is a structural schematic diagram of another embodiment of the jig for silk screen characters of the present invention.

Detailed ways

In order to make the technical solution of the utility model can be expressed more clearly, the utility model will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the utility model provides a fixture for silk screen characters, which is used to cooperate with a screen printing machine (not shown) to screen print a PCB 10. The upper and lower ends of the flexible layer of the PCB 10 are provided with A silk screen area 12 is formed between the two window areas 11 opposite to each other; during silk screen printing, characters 13 are printed on the upper surface of the silk screen area 12 . The jig for silk screen characters includes an air suction chamber 20, an operating table 30 covered on the air suction chamber 20, a stopper 40 fixed in the middle of the upper end surface of the operating table 30, and a connecting air suction chamber. The air pump 50 of the body 20, the air pump 50 generates an air pressure difference through the air suction cavity 20, and fixes the PCB board 10 to prevent the PCB board 10 from shaking during silk screen printing.

The limiting block 40 is made of PI (polyesterimide) material, and the limiting block 40 is detachably fixed on the operating table 30, so as to replace the different sizes according to the size of the window area 11 of the PCB board 10. Limiting block 40. The operating table 30 is provided with a fixed area 31 to place the PCB board 10. The operating table 30 is provided with a number of air suction holes 32 penetrating up and down in the fixed area 31. The air suction holes 32 are distributed in the fixed area 31 and At different positions corresponding to the corners and the middle of the PCB board 10, the suction cavity 20 is a hollow structure, and an opening 21 is provided at the upper end of the suction cavity 20, and the opening 21 communicates with the hollow interior of the suction cavity 20 and outside the opening 21. The operating table 30 is covered above the opening 21 , and the fixed area 31 of the operating table 30 is arranged vertically opposite to the opening 21 . The air pump 50 is connected to the hollow structure inside the suction cavity 20 through a pipeline, and the air pump 50 generates negative pressure above the console 30 through the suction cavity 20 and the suction hole 32 communicated with the suction cavity 20 .

During silk screen printing, the PCB board 10 with the window opening area 11 is placed on the fixed area 31 of the console 30, and the air pump 50 operates through the suction cavity 20 and the suction hole 32 communicating with the suction cavity 20. Negative pressure is generated above the table 30 to fix the PCB board 10 on the operating table 30 to prevent the PCB board 10 from shaking. The limit block 40 on the operating table 30 extends into the lower window opening area 11 and abuts against the bottom of the silk screen area 12 to ensure that the silk screen area 12 is evenly stressed and prevent the silk screen area 12 from being unevenly stressed and affecting the quality of silk screen printing. .

It can be understood that, as shown in FIG. 2 , in other embodiments, the jig for silk screen characters can omit the suction cavity 20, and directly connect the suction hole 32 with the pipeline 60, and the air pump 50 passes through the pipeline 60. And the suction hole 32 communicating with the pipeline 60 fixes the PCB board 10 .

To sum up, the fixture for silk screen characters of the present invention is provided with a limit block 40 on the console 30 to push against the silk screen area 12, so as to ensure that the silk screen area 12 is evenly stressed during silk screen printing and improve the quality of silk screen printing. , using the air pump 50 to generate negative pressure above the console 30 to fix the PCB board 10, effectively preventing the PCB board 10 from shaking, and further improving the quality of silk screen printing.

The above-mentioned embodiment only expresses one implementation mode of the utility model, and its description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (6)

1. A fixture for silk-screen characters, used to cooperate with a screen printing machine to screen-print a PCB board. The upper and lower ends of the flexible layer of the PCB board are provided with oppositely arranged window areas, and between the two window areas A silk screen area is formed, and it is characterized in that: the jig used for silk screen characters includes an operating table, a limit block fixed in the middle of the upper end face of the operating table, and an air pump; the limit block is detachably fixed on the operating table. On the platform, the limit blocks of different sizes are replaced according to the size of the window area of the PCB board. The side of the operating table facing the PCB board is provided with a number of suction holes, and the air pump communicates with the suction holes; the air pump passes through The air suction holes generate negative pressure above the operating table to fix the PCB board on the operating table, and the limit block on the operating table extends into the window area below the PCB board and abuts against the bottom of the silk screen area. 2. The jig for silk screen characters as claimed in claim 1, further comprising a suction cavity, the operating table cover is arranged on the suction cavity, and the air pump passes through the suction cavity Connected with the suction hole. 3. The jig for silk screen characters as claimed in claim 2, characterized in that: the suction cavity is hollow, the upper end of the suction cavity is provided with an opening, and the opening communicates with the suction cavity The hollow inside and the outside outside the opening, the console cover is arranged above the opening, and the fixed area of the console is set up and down opposite to the opening. 4. The jig for silk screen characters as claimed in claim 3, wherein the air pump is connected to the inner hollow structure of the air suction cavity through a pipeline, and the air pump passes through the air suction cavity and is connected with the air suction cavity. The suction hole connected to the body creates negative pressure above the operating table. 5. The jig for silk screen characters according to claim 1, wherein the air pump communicates with the air suction hole through a pipeline. 6 . The jig for silk screen printing characters according to claim 1 , wherein the limiting block is made of polyesterimide. 7 .