Molded Fiber Mold pressure suppression process
(1) Molded Fiber Machinery Installation and molding
Add the molding process required to add the product to the mold is called the installation. Modeling should follow the following principles: the shortest distance of the material; the laying of the material should be uniform; for the narrow runways and dead ends, the materials should be pre -made. (2) Moving temperature system The mold pressure system mainly includes the choice of molding temperature, heating rate, molding temperature and insulation time. (A) Model installation temperature Modern temperature refers to the temperature of the mold when putting the material into the mold cavity. It mainly depends on the quality indicators of the material and the quality of the mold. Generally speaking, the volatilization content of the mold is high, and when the content of insoluble resin is low, the molding temperature is low. Conversely, it is necessary to appropriately increase the temperature of the module. The complicated structure and large product installation temperature should generally be within the range of the room temperature ~ 90 ° C. (B) The temperature increase rate Refers to the heating rate from the temperature to the maximum pressure temperature. For the fast mold pressure process, the molding temperature is the suppression temperature, and there is no problem of heating rate. The Molded Fiber Tableware Machine slow mold pressure process should choose the appropriate temperature increase rate according to the type of molding resin and the thickness of the product. (C) molding temperature The resin will release or absorb a certain amount of heat during the curing process. It can determine the degree of resin concentration response according to the extension, so as to provide a basis for determining the molding temperature. In general, first determine a relatively large temperature range, and then select a reasonable molding temperature through the process -performance test. The molding temperature has a lot to do with the variety of molding materials. The molding temperature is too high, the resin response speed is too fast, the fluidity of the material is reduced too fast, and the early local curing occurs, which cannot be full. If the temperature is too low, and the insufficient thermal insulation time of the product, there will be defects such as incomplete curing. (D) Insulation time Refers to the time to heat up at the molding pressure and molding temperature. The length of the insulation time depends on the variety of the mold, the height of the molding temperature, and the structural size and performance of the product. (E)Cooling In slow molding, after the heat preservation is over, it should be gradually cooled under a certain pressure. When the mold temperature drops below 60 ° C, the molding operation can be performed. There are two types of cooling methods: natural cooling and mandatory cooling. The fast suppression process can not be used in cooling operations. After the thermal insulation is over, it can be removed at the molding temperature and removed the product. 
