1. Fasten the parts and check whether the fastening parts are loose or damaged. If damaged, replace them with the same standard parts.

2. After long-term use of the mold, the cutting edge shall be grinded, and the cutting edge surface shall be demagnetized after grinding. It shall not be magnetic, otherwise it is easy to block the material.

3. Press parts such as pressing plate and Uri glue, and unload parts such as stripper plate and pneumatic ejector. During protection, check the connection and damage of accessories at all parts, repair the damaged parts, check whether there is air leakage on the pneumatic jacking material, and accept the detailed conditions.

4. Elastic parts such as tension spring are easy to be damaged in the process of application, showing the appearance of cracking and deformation. This needs to be converted. Pay attention to the standard and type of tension spring in the conversion process. The standard and type of tension spring are recognized by color, outer diameter and length, and can be converted only when the three items are the same.