PCB cleaning agents, also referred to as washing solutions, serve the same purpose of cleaning PCBAs (Printed Circuit Board Assemblies). The choice between solvent-based and water-based cleaning materials depends on various factors, with each type having its own advantages and disadvantages. Solvent-based cleaning agents used for PCBA cleaning can be categorized into hydrocarbon solvents, halogenated…
The current situation of traditional ink, adhesive, silver paste, and silicone rubber PCB cleaning present three major problems: large consumption of cleaning solution, inadequate workplace to meet environmental protection standards, and reluctance of workers to manually clean PCBs. Traditional cleaning methods for ink, adhesive, silver paste, and silicone rubber PCBs typically involve manual wiping with…
Due to the limitations of traditional wave soldering technology in dealing with soldering surfaces with fine pitch and high-density surface mount components, the use of shielding fixtures to shield surface mount components for wave soldering of through-hole leads has emerged. Currently, the main methods used are: ① Metal iron pressing; ② Installation of snap fasteners…
Solder paste printing is a crucial step in the SMT process, and its importance cannot be overstated. It is considered one of the main processes in the entire SMT process chain. During production, more than 70% of abnormalities in the SMT placement process are more or less related to solder paste printing, especially on multi-layer…
The traditional manual cleaning process for screen printing screens involves dipping cloth strips into cleaning solution or anti-white water for scrubbing, typically cleaning one side before proceeding to the other. However, this process poses several challenges and issues: Many companies have been aware of these issues for many years, especially those that prioritize quality and…
In simple terms, the effects of the stencil on SMT printing defects mainly come from seven aspects: stencil thickness, number of apertures (either too many or too few), aperture position, aperture size, aperture shape, roughness of the aperture walls, and cleanliness of the apertures after stencil use. Let’s elaborate on each of these: To control…
The pick-and-place machine nozzles play a significant role in the placement rate (SMT placement rate) in PCB manufacturing companies. Many people value the SMT placement rate because it not only affects the production cost of the production line but also influences the operational efficiency of the production workshop. Let’s briefly introduce how nozzles affect the…
The nozzle cleaning machine, also known as the pick-and-place machine nozzle cleaning machine or SMT nozzle cleaning machine, is a device used for cleaning pick-and-place machine nozzles. This type of machine is commonly referred to as a nozzle cleaning machine, and in some places, it is also called a nozzle cleaner. Principle of Nozzle Cleaning…
Stencil cleaning machines are divided into two main categories: pneumatic stencil cleaning machines and electric stencil cleaning machines. Many newcomers to the SMT industry may wonder what stencil cleaning machines are used for. In fact, stencil cleaning machines are industrial cleaning equipment used to clean stencils. Specifically, they are used to remove residues such as…
When discussing the importance of the PCBA cleaning process, it involves various aspects such as cleaning methods, cleaning agents, and cleaning standards. User Zhang Min mentioned several instances where improper cleaning led to changes in device performance, such as reduced insulation performance of transformers and decreased contact performance of key switches. Recently, Zhang Min specifically…
