Reasons for the high iron fence mold appeared burst is relatively diverse, mold material will not easily broken in subsequent processing. Improper heat treatment process, quenching and tempering process will produce deformation of the mold. Die grinding plane is not enough, resulting deflection line cutting mishandled, cable wire cutting, bridge fence mold price, the gap does not, did not make clear angle. Equipment selection punch, punch tonnage punching power is not enough, the next transfer mode too deeply. Stripper ring true, no demagnetization process before production, no stripper tip, production has broken springs, etc. needle card stock. Blanking flow, when assembled mold seamless feces, feces or roll blocking, blocking feces feet. Insufficient awareness of production, lamination stamping, Northeast bridge fence mold, positioning is not in place, the shelf bridge fence mold, mold itself the problem, but also for production. High iron fence mold appear to burst more diverse reasons, the production process in operation, must be careful to avoid the occurrence of these problems, ensure a high iron fence life of mold. Type molds are usually processed in accordance with different objects and processes classification. From the industry point of view the main distinction of plastic molds, rubber molds, metal Die, metal cold extrusion dies and hot extrusion dies, metal drawing dies, powder metallurgy molds, metal casting molds, metal casting molds, glass molds fiberglass mold. Melt molding is heated to above the melting point of the plastic, so that in the molten state is molded processing methods, such molding methods below are injection molding, compression molding, extrusion molding; refers to a solid phase formed in the melting temperature of the plastic The following remains solid molding method of a class, such as some plastic packaging container production is vacuum molding, compression molding and blow molding