免费人Av在线影院,一区二区三区在线性爱视频,精品亚洲成a人在线观看,日本中文字幕有码在线看

Welcome to Dongguan BestWay Technology Co., LTD.
E-mail: Selina@best-way.cn | 簡體中文 | ENGLISH

National High-tech Enterprise
More than 30 national patented technologies

Service Hotline:

+86 15813710406

BackHomeFAQ

The principle of printing solder paste in SMT patch processing

Date:2020-09-27Views:903
Everyone knows that in the process of electronic processing SMT patch processing, it is necessary to use a printing machine to print the circuit board, so do you know the principle?

When the squeegee moves forward at a certain speed and angle, a certain pressure is generated on the solder paste, which pushes the solder paste to roll in front of the squeegee, and generates the pressure required to inject the solder paste into the mesh (ie, the opening of the template). The friction force causes the solder paste to shear at the junction of the squeegee and the stencil (template opening), and the shear force reduces the viscosity of the solder paste, thereby smoothly injecting into the mesh; when the squeegee leaves the template opening, the solder paste The viscosity quickly returns to its original state.


There are three key elements for the success of solder paste printing: solder paste rolling, filling, and demolding.   
During printing, only when the solder paste rolls in front of the squeegee, can the pressure to inject the solder paste into the opening be generated; the degree of the solder paste filling the opening of the template determines the amount of solder paste; the completeness of the demolding determines the missed printing of the solder paste and the solder paste pattern Completeness.
Product Categories
Latest News

    Solutions to five common problems of software protection board lithium battery

    Views:2114

    The lithium battery protection board is the charge and discharge protection of the series lithium battery pack; when fully charged, it can ensure that the voltage difference between the individual cells is less than the set value (generally ±20mV), and realize the equal charge of the individual cells of the battery pack , Effectively improve the charging effect in series charging mode;

    Analysis and solutions of common bad causes of lithium battery protection board

    Views:1988

    Analysis of several common bad causes of lithium battery protection boards in daily situations and specific solutions.

    What are the lithium battery protection board and battery protection system

    Views:1710

    The lithium battery protection board can protect the series and parallel battery packs from charging and discharging, and can detect the over-voltage, over-current, over-temperature, under-voltage, and short-circuit status of each single cell in the battery pack, thereby extending the service life of the battery and avoiding the battery Damaged by over discharge. Lithium battery protection board is an indispensable part of lithium battery.
關(guān)注官方微信