Hydraulic machine exhaust

In order to eliminate the air, moisture and volatiles in the mold, after the mold is closed, some still need to open the mold for a period of time. This process is called exhaust. The exhaust operation should be done quickly, and it must be completed when the resin in the molding compound has not been plasticized, otherwise the resin hardens and loses its plasticity. At this time, even if the mold is opened, the air cannot be exhausted, and the ideal product cannot be obtained even if the temperature and pressure are increased. . Exhaust can shorten the curing time, and can improve the mechanical and electrical properties of the product. In order to avoid the delamination phenomenon of the product, it is not good to vent too soon or too late, and the purpose of venting cannot be achieved too early. The surface of the molded material has been solidified too late, and the gas cannot be discharged.