The angle of the sprue cone must be large enough to break the mold, but if too large will increase the cooling time, materials and time-consuming cutting sprue.
This ensures there is no gap between the sprue and nozzle when touching. Such gaps may be greater due to gradual wear caused some material leak problem.
- Cone angle of the sprue must be large enough to break the mold, but if too large will increase the cooling time, material costs, Cut puff spend time out of the product. If the taper angle is too small can cause difficulties when removing stalks the open mold spray. Therefore, the minimum taper angle should be 1 °.
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