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Reason and improvement method for the phenomenon of serious sticking to the silicone tube
Give us a recent case of a silicone rubber tube stuck to the unusual case. The reason why the case, is the case, because it is too much of a generation
Table.
One, a few days ago saw a silicone tube post, said that the sticky mold is serious, can not produce, has been suspended.
Two. The change of material: use of reclaimed rubber reclaimed rubber glue containing high rate of powder, powder is to use their own original material grinding, such as size
Sesame seed size. We use 40 mesh powder and the powder factory.
Three, the original use of the cheapest reclaimed rubber, grinding his collocation about 10 meshes the size of sesame powder, no mold sticking phenomenon. Change
The high rate of rubber reclaimed rubber with high elasticity, collocation 40 mesh powder, serious sticking gas bag. Unable to produce.
Four. Formula Collocation: 4 kg NR.4 kg SBR.19 kg recycled rubber. 6 kg powder.
Always say change is a change in material, recycled rubber and fine powder, serious soldering, gas bag. Unable to produce.
When I arrived, I felt the glue, the first feeling is that the glue is too sticky.
Because of the large amount of recycled rubber, so sticky is very serious.
So for plastic material viscosity, how to solve it?
Normal practice is to increase the stearic acid and paraffin wax. But the formula has reached 2.5 and 1.5 copies.
When I arrived. First analysis.
1 reclaimed rubber quality. With a high rate of plastic. At the same time, the viscosity of the roller and the viscosity is increased.
2 from the crude powder into fine powder. The cohesion of the adhesive was increased and the toughness of the adhesive was changed. Cause the air to become poor.
Improvement method:
1 increase by 50 powder content, the original, increased to 100.
Test results: by the bubble rate of 100%, improved to 30%.
2 spray release agent, (the original factory without release agent, halo) the bubble rate dropped to 15%.
3 surface treatment advice mold, Teflon or plating. (no surface treatment. Again halo.)
Processing results:. 3 mold spray a release agent, the bubble rate
For mold production, groove deeper. Exhaust gas.
Method
3 mold spray a release agent, the bubble rate 10%-15%. Could not effectively improve.
Again, adding 80 phr of crude rubber powder.
Effect: collocation release agent, completely improve.
Review:
One A few elements: 1 the material of the sticky mold 2 mold surface treatment. 3 use of release agent. 4 loose material.
This time of the mold, focus on the above 4 points, the whole problem. To make the problem particularly serious.
Suggestion:
1 the mold surface must be prepared, such as electroplating, teflon.
2 release agent, it is normal to use. At the same time, the mold is also to be cleaned regularly, save the mold surface smooth.
3 the adhesive material of the adhesive can not be too heavy, you can collocation point of stearic acid and wax. If the viscosity is too heavy, the mold must be in place.
Better theory.
4 the material of the material is loose, the better, the more conducive to the exhaust gas.
This paper is from Shenzhen,, id=539?
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