When selecting synthetic stone materials suitable for wave soldering, the following aspects need to be considered:
Temperature resistance
-During the wave soldering process, the soldering temperature is relatively high, so synthetic stone materials need to have excellent temperature resistance. A synthetic stone that can withstand the highest temperature of wave soldering (usually around 260 ℃, with a peak value of up to 350 ℃) without deformation or softening should be selected. The thermal deformation temperature index of the material is crucial, ensuring that its thermal deformation temperature is higher than the actual operating temperature of wave soldering.
Mechanical performance
-Dimensional stability: Synthetic stones should maintain good dimensional stability during repeated heating and cooling processes to ensure precise positioning of PCB boards during wave soldering. The size change rate should be as small as possible to ensure the accuracy of the fixture and avoid PCB board welding position deviation caused by material shrinkage or expansion.
-Hardness and strength: The material needs to have sufficient hardness and strength to withstand the weight of the PCB board and the external forces it may experience during transportation. If the hardness and strength are insufficient, the fixture may experience wear, breakage, and other issues, affecting its service life and welding quality.
Insulation performance
-Good insulation performance is essential. During the wave soldering process, the synthetic stone should prevent short circuits between the circuits on the PCB board and the fixtures or other metal components. The insulation resistance should be high enough to ensure that the current does not leak through the fixture, thereby ensuring the safety of the welding process and the quality of the welded product.
chemical stability
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