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2022-12-14 11:10:32 PCBA 438 Viewed
SummaryPCBA China SMT Service point PCBA China SMT service is a key process in the production of smt plant, which requires careful management of processing quality. In order to achieve the SMT quality of PCBA China, all kinds of details and matters to be noted in the production process must be worked out. T...
PCBA China SMT Service point
PCBA China SMT service is a key process in the production of smt plant, which requires careful management of processing quality. In order to achieve the SMT quality of PCBA China, all kinds of details and matters to be noted in the production process must be worked out. Then what should the PCBA China SMT service pay attention to?
1. In PCBA China SMT, solder paste printing is in the front position in the patch processing link. Quality inspection must be carried out on the printed sheet to ensure that there is no extra tin, fewer tin, tin, color bias and other undesirable phenomena.
2. Light material mounting Minor material mounting processing usually adopts CP machine, which can quickly mount materials. The PCBA China SMT should be completely prepared before the formal processing, so as to avoid processing defects caused by panic in the process of PCBA China SMT.
3. PCBA China SMT Large material Mounting This processing technology usually adopts XP machine to process large materials that cannot be mounted with CP.
PCBA China SMT processing points
The SMT manufacturing in PCBA China shall be processed in strict accordance with the processing requirements. Strong quality of PCBA China SMT processing and excellent service attitude are the key points for the survival of a processing enterprise. The following are some points for attention.
1. Pre-furnace QC is an indispensable quality assurance link for pre-furnace QC processing in PCBA China SMT processing. Strict implementation of pre-furnace QC can ensure that all semi-finished products can meet the quality requirements before PCBA China SMT processing.
2. The position of the electrode weld in the welding process of PCBA China SMT is also extremely crucial, and the quality of the electrode weld is directly related to the quality of the electrode. PCBA China SMT welding should pay attention to the main problems of furnace temperature, preheating, suitable welding temperature, etc.
3. The quality of post-furnace QC of PCBA China SMT is an outstanding aspect of the processing plant. Only with quality assurance can we survive in this very competitive industry.
4. The quality assurance spot check of PCBA China SMT can roughly determine the production qualified rate of our products, so as to ensure the quality of electronic processing products.
5. PCBA China SMT products shall be neatly packed and correctly kept, transported and protected when entering the warehouse.
Factors of solder paste deficiency in PCBA China
The factors of insufficient PCBA China solder paste are as follows :
1. When PCBA China printing press was working, solder paste was not added in time.
2. The quality of PCBA China solder paste is abnormal, which is mixed with rough pieces and other foreign bodies.
3. PCBA China solder paste that was not used up before has expired and has been used again.
4, the quality of PCBA China circuit board, there are inconspicuous coverings on the pad, such as the solder flux printed on the pad.
5. The fixing clamp of PCBA China circuit board in the printing press is loose.
6, PCBA China solder paste leakage screen thickness is not uniform.
7, PCBA China solder paste leakage screen board or circuit board there are pollutants (such as PCB packaging, screen board wiping paper, floating foreign bodies in the air, etc.).
8. PCBA China solder paste scraper is damaged, and the mesh board is damaged.
9. The pressure, angle, speed and demoulding speed of PCBA China solder paste scraper are not set correctly.
Cause of adhesion of PCBA China solder paste
1. PCBA China manufacturer's circuit board design defects, welding pad spacing is too short.
2. PCBA China manufacturer's mesh board has problems, and the hole is not in the right position.
3. PCBA China manufacturer's net board is not wiped clean.
4. PCBA China manufacturer's plate problem makes solder paste fall off badly.
5. The solder paste of PCBA China manufacturer has poor performance, unqualified viscosity and collapse.
6. The fixing clamp of PCBA China circuit board in the printing press is loose.
7. The pressure, angle, speed and demoulding speed of solder paste scraper of PCBA China manufacturers are not perfectly set.
8. PCBA China's solder paste is extruded and bonded due to human factors after printing.
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