During the setting heat pressure process, the cause of molded fiber finished tableware cracking

During the setting heat pressure process, the cause of Molded Fiber Finished tableware cracking

(1) High moisture content
For tableware with alien cavity structure, it is easy to cause the product's wet embryo to crack due to the content of water. During the molding wet embryo process, the product uses a vacuum adsorption to draw excess water. The water content is generally controlled at about 60-65%during the process of smoking. If the water content is too high, whether it is manual transfer or a robotic arm suction in the formation of the wet embryo transfer process, it will reduce the combination of fiber, and it is easy to be easy Causes the product! Conversely, the lower the moisture, the stronger the binding force of plant fibers, and the less likely it is to crack. The cause of high water is divided into: first, the vacuum pumping time is too short; second, the molding seal is not tight, there is a vacuum problem; third, the plant fiber used in the use of poor water filtration; fourth, the real vacuum is too too much, the vacuum is too much too much, the real vacuum is too, too the vacuum is too much. Low, the general vacuum is preferably about -0.05-0.06MPa.

(2) The temperature of the heat source is too high
At present, most factories use thermal conductivity as a medium heating and heating plate and then heating molds. The heat conductive oil is used as a closed liquid heating medium and the temperature difference is small. In the temperature, the oil port temperature during the design and use of thermal oil is generally designed according to 260-280 degrees, which will be defined accordingly. It will also cause product cracking, so the temperature of temperature and the flow of thermal oil are directly related to the product's cracking.
Contact Minjie