1, wax models exist, this is one of the most common defects, namely in the pressed close type, pressure type combination of joint, the joint of core and core city and other places have very thin slices of wax to escape.The reasons are mainly molding precision is not enough, pressed parting surface or within a joint surface damage or impurity attached, or rated-locking force is not enough, the injection pressure is too high.Or wax temperature is too high.Wing must be thoroughly cleared, wax models can be used.
2, wax mold and molding adhesive, this is because the don't use the mold release agent, or wax and molding temperature is too high, or is pressed inside surface clean.