BMC injection molding machine manufacturing process

Date：2016-06-15 10:32:32

At present, domestic and foreign automobile widely used parabolic shaped headlamps and a freeform headlamp reflectors, conventional steel stamping molding process has been unable to meet the needs of the application usually thermosets BMC injection molding machine method to produce.

BMC as a glass fiber reinforced unsaturated polyester thermoset composites, since the late 1950s developed much attention, has been developing rapidly, with conventional thermoset, BMC injection molding machine technology, including compression molding, transfer molding and injection molding are three ways in which BMC injection molding machine with a high degree of automation, short cycle times, good surface quality parts, molding parts with good advantages.

BMC is an unsaturated polyester resin, chopped glass fibers, fillers and various additives such as initiators, polymerization inhibitors, internal mold release agents (thickening agents generally do not) sufficiently mixing the dough-like prepreg material.

Manufacturing process in two steps BMC injection molding machine, the first step is to take a high-shear type stirring mechanism resin, resin paste initiator agents, pigments, fillers and internal mold release agents and other components, the various components of the above after the filler should be added, before adding other ingredients mix well, then slowly add the filler to disperse evenly. The second step, the stirred slurry was poured into Z-shaped cutter blender or planetary mixer and added short glass fiber filaments, then mixing 10-15min immediately after discharge, with a further squeeze dough extruder extruded rope type column or blobs.

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