1, gypsum material made of mold cavity, also known as broken mold method. But the plaster material is low in strength and easy to deform when it is placed for a long time.
2, glass steel materials made of die cavity, also called die method. That is, in the glass fiber reinforced plastic mold to turn over the glass fiber reinforced plastic sculpture, glass fiber reinforced plastic mold generally use hand paste molding method, production should be designed before forming the line.
3. The mould cavity made of silicone rubber is also called soft mold. Silicone rubber material is fluid state before use, with good flowability and filling. Rubber elastomer is formed by crosslinking reaction, and it can have larger elastic deformation. The silicone rubber after cross-linking has good sealing property and is not bonded to the original mold and the glass fiber reinforced plastic. The surface layer material of glass fiber reinforced plastic sculpture mould can be used to copy the shape of the product with high quality and ensure the smooth demoulding. However, silicone rubber pairs tend to deform and support carriers are needed when used as molds. The utility model can be made of glass fiber reinforced plastics and is used as a carrier material for moulds. The concrete mold making method is: the prepared silicone rubber is coated several times on the original mold, and the silicone rubber layer should be more than 1mm. When the silicone rubber is crosslinked, the glass fiber reinforced plastic layer with a thickness of about 3mm is formed on the silicone rubber. After curing, the glass fiber is cut along the divided block, and the glass fiber reinforced plastic layer and the silicone rubber layer are simultaneously cut during cutting. A connecting slot is arranged between the unit blocks, and a positioning groove is arranged at the connecting rib to ensure that the block mold is assembled into a whole through the connecting rib. After the above work is finished, the glass fiber reinforced plastic block is removed, then the silicone rubber layer is removed, and the removed silicon rubber block is immediately returned to the FRP unit mold.