Glue injection machine plays an important role in the production of electronic communication industry. In the double liquid dispensing machine, the chemical reaction between the dispensing machine and organic elements such as N, P, s will be rapid, which is often referred to as silicone poisoning.
Cause analysis of double liquid rubber machine poisoning:
When using silicone in double liquid dispenser, the addition reaction of silicone is needed, that is, the hydrogen bond addition reaction of silicone and the bond addition reaction of silicone. Because the addition reaction requires platinum as the raw material, the mixture of the two produces an unstable compound.
This kind of hybrid material is very vulnerable to some changes in physical and chemical structure or composite structure, it is easy to lose catalytic active silicon hydrogen and vinyl silicon bonds, if added to the silicone vulcanization process or curing and containing catalyst can be added to the molding ("PT" reaction, any material (two surface contact, etc.) in normal curing conditions.
If the silicone rubber is not cured (the country before and after reaction is still in liquid state), or the treatment is incomplete (the silicone rubber cannot reach the required elastomer or hardness after curing or the surface becomes sticky after curing), this phenomenon is the occurrence of catalyst "poisoning".
This paper introduces a method to avoid silica gel poisoning of double group dispenser
I. avoid organosilicon poisoning, contact with organic compounds containing phosphorus, sulfur and nitrogen in the double liquid pouring machine, or use polyurethane, epoxy resin, unsaturated polyester, condensed RSP silicone rubber and other products at the same time in the double liquid pouring machine.
When using silica gel from different manufacturers, the original double liquid dispenser will gradually clean the silica gel from the barrel to the rubber pump to avoid the sealing poisoning of the rubber source.
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