BRECO timing belt PU timing belt timing belt manufacturing process
The molding method of curing methods are the following two:
Vulcanizing cramp (1) applies to semi-finished molding with mold method to pressure through the hoop, and then send Vulcanization or tablet press vulcanization.
(2) the Curing applies with embryos forming the molding drum. Put pouches with embryos together with the forming drum, into the curing tank, internal and external pressure, heating. The first phase of the vapor pressure of 0.3 to 0.4MPa, for 2-3 minutes; the second stage and then pressurized to 0.8 to 1MPa, continued until the specified curing cycle.
Casting method
Polyester polyurethane as the main material, through the four steps to complete.
1, adipic acid and ethylene glycol as raw materials by polycondensation, the two hydroxyl end groups of polyester.
2, the polyester in the *** (2,4 toluene di-isocyanate), chain extender from prepolymer.
Prepolymer vacuum, with the exception of the bubble.
4, by adding a curing agent MOCA (3,3 - dichloro - 4,4 - diamino diphenyl methane) Stir cast to preset the c***ity of a good strong layer. After heating, curing, demolding derived products. Molding method
The main raw material for rubber neoprene, strong layer of commonly used wire rope or aramid rope. The requirements of a strong rope, including high tensile, low elongation and heat distortion.
BRECO同步带PU同步带同步齿形带的制造工艺
模压法的硫化方式有以下两种：
模压法