1. The mold cavity made of gypsum material is also called the mold breaking method. However, the strength of gypsum material is low and it is easy to deform when left for a long time.
2. The mold cavity made of
stone carving materials is also called soft mold method. Stone carving materials are in a fluid state before use, with good fluidity and filling properties. After preparation, a rubber elastomer is formed through cross-linking reaction, which can have large elastic deformation. The cross-linked
stone sculpture have good airtightness and are not bonded to the original model or
landscape boulders. Using it as the surface layer material of the landscape boulders mold can not only reproduce the shape of the work with high quality, but also ensure smooth demoulding. However, the cross-linked stone sculpture is easy to deform, and when used as a mold, a support carrier is required. It can be used as the carrier material of the mould, taking advantage of the characteristics of the landscape boulders being easy to form. The specific mold making method is: paint the prepared stone sculpture on the original mold several times, and the stone sculpture should be more than 1mm behind. After the stone carving is cross-linked, a stone carving with a thickness of about 3mm is formed on the stone carving. After the landscape boulders is solidified, cut the overall mold along the divided unit blocks. When cutting, pay attention to cutting the stone carving and stone carving at the same time. Make connection ribs between the unit blocks, and position grooves should be set at the connection ribs to ensure that the unit block molds are combined into a whole through the connection ribs. After the above work is completed, the landscape boulders unit block is demoulded, and then the stone carving is taken off, and the stone carving block that is taken off is put back into the landscape boulders unit mold immediately.
3. The mold cavity made of landscape boulders materials is also called hard mold method. That is, the landscape boulders are remade on the landscape boulders molds. The landscape boulders molds generally adopt the hand lay-up method, and the molding line should be designed before making.
landscape boulders have been widely used in the stone carving industry due to their advantages of flexible molding, short production and development cycle, good craftsmanship, wear resistance, and long service life. In particular, the stone carving production technology based on hand lay-up molding technology has developed more rapidly. Stone carving paper molding is also called hand lay-up molding or contact molding. The method is to first apply a layer of glue on the mold, and then spread a piece of cloth to soak the fibers in the glue and eliminate air bubbles, and then continue to apply the glue layer by layer until it is completely spread. After curing, the finished product is obtained.
① Unsaturated resin molding preparation method: 100 parts of 191# resin, 4 parts of cyclohexanone peroxide; 1-4 parts of cobalt naphthenate solution, appropriate amount of color paste. If the preparation is carried out according to production conditions, put 100 kilograms of resin into the enamel basin, then add 4 kilograms of cyclohexanone oxide paste, stir evenly, and then add an appropriate amount of titanium turquoise paste until the color meets the required requirements. , put it aside. The advantage of unsaturated resin is that it is cheap.
②The advantages of epoxy resin are low curing shrinkage and excellent electrical insulation properties. It is stable to various acids, alkalis and organic solvents. Its tensile strength can reach 45MPa-70MPa, and its bending strength can reach 90MPa-120MPa. The supporting curing agent can be E-999 curing agent for epoxy resin at room temperature. The diluent is acetone (or propylene oxide butyl ether). The mold gel coat adopts mold-specific gel coat that is resistant to high temperatures, has high hardness and good toughness. The fiber reinforced materials produced are made of 33g/m2 alkali-free chopped strand mat and 0.2mm glass fiber square cloth.
