CN213847167U

CN213847167U - 3D steel mesh

Info

Publication number: CN213847167U
Application number: CN202022404115.0U
Authority: CN
Inventors: 韩杰; 邓道成; 陈尚明; 胡飞龙; 杨林; 刘万学
Original assignee: Chongqing Unication Electronic Technology Co ltd
Current assignee: Chongqing Unication Electronic Technology Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-07-30
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses a 3D steel mesh, including the steel mesh, the steel mesh includes that a plurality of component are regional and a plurality of go up the tin region, go up the tin region and install the protective layer, go up the tin region and the protective layer is not on a printing line. The utility model discloses to install the equal trompil in position of component and pad, adopt the component that the safety cover protection has installed, satisfied the technical purpose to pasting the secondary backward flow of good PCB board, simple structure easily operates and the preparation simultaneously, is worth promoting in a large number in this field.

Description

3D steel mesh

Technical Field

The utility model relates to a SMT surface mounting technology field, it is specific, relate to a 3D steel mesh.

Background

The steel mesh is used for SMT surface mounting, the thickness of the steel mesh is generally different between 0.08 mm and 0.2mm, and the conventional steel mesh can only print a flat PCB. For the PCBA after the first time of printing patch backflow, the printing and processing can not be performed again, along with the rapid development of the technology, the process processing is gradually complicated, and the process difficulty is continuously improved. Many specialty products require secondary printing, component mounting, re-reflow, etc. after the first patch reflow.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a 3D steel mesh can satisfy PCBA's secondary operation. The true book

The novel purpose is realized by the following technical scheme:

a 3D steel mesh comprising a plurality of component areas and a plurality of tinning areas, the component areas being mounted with a protective layer, the tinning areas and protective layer not being on one print line.

The element region and the tin-on region are both holes.

The component area corresponds to the position of a processed component on the PCB, and the area on the PCB needing tin coating on the tin coating area corresponds to the area on the PCB needing tin coating.

The protective layer is of a protruding structure in the direction away from the PCB.

Further, a steel sheet is arranged on the protective layer, and the steel sheet and the steel mesh are made of the same material.

Furthermore, the protective layer is made of epoxy glass fiber board.

Further, the distance between the protective layer and the tin-coated area is not more than 1 mm.

The utility model has the advantages that:

the utility model discloses to install the equal trompil in position of component and pad, adopt the component that the safety cover protection has installed, satisfied the technical purpose to pasting the secondary backward flow of good PCB board, simple structure easily operates and the preparation simultaneously, is worth promoting in a large number in this field.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic cross-sectional structure of the present invention;

FIG. 2 is a schematic diagram of the device.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.

The embodiment provides a 3D steel mesh, as shown in FIGS. 1 and 2, which comprises a steel mesh 1, wherein the steel mesh 1 is provided with a plurality of element areas 4 and a plurality of tinning areas 2, the element areas 4 and the tinning areas 2 are both holes, the element areas 4 correspond to mounted elements of a PCB required to be subjected to secondary printing processing, the tinning areas 2 correspond to pads of the PCB required to be subjected to secondary printing processing, the element areas 4 are provided with protective layers 3 attached to the element areas 4, the protective layers 3 are protruding in a direction away from the PCB, the protective layers 4 are made of epoxy glass fiber boards, steel sheets made of the same steel mesh are attached to the protective layers 3 to enhance the protection degree and the durability of a mold, so that the problem that PCBA products required to be subjected to single-side secondary printing processing can be solved, only single-phase printing can be performed on the printing characteristics, and therefore, it is required to be noted that the tinning areas and the positions of the protective covers cannot be on the same printing line, therefore, the layout of the pads of the PCB element and the layout of the jointed board mode should be fully considered before the design. The device can be used on a high-density board, the minimum distance between the protective layer 3 and the tin-coating area 2 can reach 1.0mm, and the tin coating amount can be well controlled.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A 3D steel mesh, characterized in that: the printing device comprises a steel mesh, wherein the steel mesh comprises a plurality of element areas and a plurality of tinning areas, protective layers are arranged on the element areas, and the tinning areas and the protective layers are not on one printing line;

the element region and the tin-coating region are both holes;

the component area corresponds to the position of a component on the PCB, and the soldering land of the tin-coating area corresponds to the soldering land of the PCB;

2. The 3D steel mesh according to claim 1, wherein: and the protective layer is provided with a steel sheet, and the steel sheet and the steel mesh are made of the same material.

3. The 3D steel mesh according to claim 1, wherein: the protective layer is made of epoxy glass fiber board.

4. A 3D steel mesh according to claim 3, wherein: the distance between the protective layer and the tin-coated area is not more than 1 mm.