As the most important production tool of the injection molding factory, the injection mold determines the shape, specification, size, and appearance finish of the product. The material of the hardware mold is steel, which is generally composed of a front mold and rear mold.

Due to the specificity, precision, vulnerability and other characteristics of the mold, the safety protection of the mold is vital. They are mainly as follows:

• Anti-rust: Prevent rusting caused by water leakage/ condensation / rain / fingerprints in the injectionmold.
• Anti-collision: Prevent the mold from crashing due to the breakage of the thimble and the failure to retract in place.
• Deburring: Prevent mold burrs from being touched by cloth wiper/ material punching / hand wipe / spout pliers.
• Missing parts: Prevent the mold from being damaged due to lack of tie rods/ washers and other parts.
• Anti-pressure: Prevent the mold from being crushed due to the mold locking andthe remaining product.
• Underpressure: Prevent mold damage resulting from excessive low pressure protection.

Among them, the proportion of mold damage resulting from the fllowing situations is relatively high and frequently occur:

• Breakage of the thimble.
• Thimble not returning in place.
• Residual product in the mold.
• Lack of accessories.

So more than 85% of the mold damage is caused by these reasons. The maintenance cost of molds is generally high. Therefore, the problem that how to avoid such situations is directly related to the interests of the injection molding industry.