Injection molding of hollow plastic plate production technology cycle are as follows: closed mold a high-pressure low-speed mode-locked injection seat forward a security of a melt injection pressure into the mold melt cooling (the time of this process as well as the plasticizing screw with injection unit backward, the screw rotation plastics raw materials) mold forming the melt cooled and solidified, the mold (the top of the products) a closed mold (next injection products circulation start of production).