CN210553573U - Printing screen - Google Patents

Abstract

The utility model provides a printing screen plate, it is used for a printed element of treating on the printing circuit board, and it includes: a net body which is shaped corresponding to the element to be printed; a blocking frame, which is protruded on the screen body along the edge of the element to be printed towards one side far away from the element to be printed, and a working cavity is formed inside the blocking frame; and a handle formed by one edge of the baffle frame protruding outwards.

Description

Printing screen

Technical Field

The utility model relates to a printing screen, especially a fixed simple quick printing screen.

Background

SMT is an electronic mounting technique in which Surface Mount components (such as resistors, capacitors, inductors, and the like) are directly mounted and soldered on the Surface of a circuit board by using automatic mounting equipment such as a solder paste printer, a chip mounter, reflow soldering, and the like. In the SMT production process, printing has been a difficult problem in the SMT manufacturing industry, especially in the QFN (Quad Flat No-lead package) IC pitch of 0.4pitch (0.4mm) and some SMT printing processes with narrow space, the current screen is difficult to print solder paste on both QFN and SMT slots, and has the following disadvantages:

(1) the screen plate is difficult to position and fix;

(2) the screen plate does not have a mark machine type number and is difficult to find;

(3) the QFN part is difficult to print solder paste due to shielding of a plurality of parts at the periphery;

(4) easy displacement when sticking the adhesive tape;

(5) spreading contamination of solder paste;

(6) yellow glue is wasted.

In view of the above, the present invention provides a printing screen which is easy and fast to fix and can overcome the above disadvantages.

Disclosure of Invention

The utility model aims to solve the technical problem that a printing screen plate is provided, it is fixed simply fast, can overcome above-mentioned shortcoming.

In order to solve the above technical problem, the utility model discloses a printing screen plate, it is used for a printed element on the printing circuit board, and it includes:

a net body which is shaped corresponding to the element to be printed;

a blocking frame, which is protruded on the screen body along the edge of the element to be printed towards one side far away from the element to be printed, and a working cavity is formed inside the blocking frame;

a handle formed by one edge of the baffle frame protruding outwards.

Preferably, the handle has a marking portion for marking the model and the position number.

Preferably, the element to be printed is a QFN chip, and the web is square.

Compared with the prior art, the utility model can quickly find the corresponding printing screen plate through the identification part on the handle, then hold one end of the handle far away from the baffle frame, place the printing screen plate of the utility model above the element to be printed, and fix the screen body on the element to be printed by applying force on the handle; then carry out the printing of tin cream to waiting to print element below to keep off the working chamber of frame in this, can prevent that the outside diffusion of tin cream from flowing and causing on other components pollution or short circuit scheduling problem, and finish when the printing, the accessible handle will the utility model discloses a printing otter board is direct upwards mentioned perpendicularly, can take off, from this visible, the utility model discloses a printing otter board is fixed simple quick, and the drawing of patterns is simple, can not destroy the tin cream, and the operation becomes simple, and novice is also operable.

Drawings

Fig. 1 is a schematic perspective view of the printing screen of the present invention.

Detailed Description

Referring to fig. 1, the present invention provides a printing screen for printing a component to be printed (not shown) on a circuit board, the printing screen includes a screen body 10, a screen frame 11 and a handle 12.

The net body 10, which is shaped corresponding to the element to be printed, is used for being placed on the element to be printed so as to print solder paste.

The blocking frame 11 protrudes from the screen body 10 along the edge of the element to be printed toward the side away from the element to be printed. The baffle frame 11 forms a working chamber 110 therein.

The handle 12 is formed by one edge of the baffle frame 11 protruding outwards. In this embodiment, in order to facilitate finding the corresponding printing screen quickly, the handle 12 has a marking portion 120 for identifying the model and the position number.

In the embodiment, the element to be printed is a QFN chip, and the mesh body 10 is square.

When the element to be printed is to be printed, the user can quickly find the corresponding printing screen plate through the identification part 120 on the handle 12, then hold the handle 12 at one end far away from the blocking frame 11, place the printing screen plate of the present invention above the element to be printed, and fix the screen body 10 on the element to be printed by applying force to the handle 12; then carry out the printing of tin cream to the printing element of treating that is located the below in this working chamber 110 that keeps off frame 11, can prevent that the outside diffusion of tin cream from causing on flowing other components to pollute or short circuit scheduling problem, and finishes when the printing, accessible handle 12 will the utility model discloses a printing otter board is direct upwards mentioned perpendicularly, can take off, from this visible, the utility model discloses a printing otter board is fixed simple quick, and the drawing of patterns is simple, can not destroy the tin cream, and the operation becomes simple, and novice is also operable.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (3)

1. A printing screen for printing a component to be printed on a circuit board, comprising:

a net body which is shaped corresponding to the element to be printed;

a blocking frame, which is protruded on the screen body along the edge of the element to be printed towards one side far away from the element to be printed, and a working cavity is formed inside the blocking frame;

a handle formed by one edge of the baffle frame protruding outwards.

2. A printing screen according to claim 1 wherein the handle has a marking thereon for identifying a model and a station number.

3. A printing screen according to claim 1 or 2 wherein the element to be printed is a QFN chip and the screen body is square.

Images