Fan gate is a gradually expanding gate, as fans, is by the side gate to mutate. The gate along the feed direction gradually widened, becomes thinner in thickness, melt through the gate level about 1mm into the cavity. The gate depth depends on the product of thickness, generally 0.25-1.5mm, gate width is generally the gate cavity width 1/4, but a minimum of not less than 8mm.
  1.vantages of  gate. Melt into the cavity through a gradual sector, therefore, the melt can be evenly distributed in the horizontal, can reduce the internal stress of products, reduce the deformation. Because the melt is transversely dispersed into the cavity, so the rhyolite and orientation effect is greatly reduced. Can reduce the possibility of into the air, and the cavity exhaust is good, can avoid the gas into melt.
  2.e gate defects. The gate is wide, formed after the removal of the gate larger workload, troublesome, and increased costs. The product side shear mark long, affecting the product appearance, if re treatment, and increased workload.
  3.plication of gate. Fan gate because the feeding mouth wide, feeding smooth, so it is always used to forming long, flat products and thin, such as cover plate, rod, plate tray, etc.. For the bad fluidity of plastic, such as PC, PSF, fan gate was able to.