How to make a soft package mold!

Flexible mold is a relatively simple one in mold manufacturing.

Silicone rubber, also known as silicone rubber and silicone, is divided into one-component silicone rubber (RTV- 1) and two-component room temperature vulcanized silicone rubber (RTV-2). Silicone rubber is stable in chemical properties, non-toxic and tasteless, and is a transparent or milky viscous liquid. Insoluble in water and other solvents, it can be diluted with silicone oil. Chemical formula: mSiO2.nH2O, molecular weight: 60.08. Room temperature vulcanized silicone rubber is a kind of colloid containing hydroxyl acetoxy group. Its molecular structure is composed of Si-O-Si bond, and the silicon atom is mainly connected with methyl group, and a small amount of unsaturated groups are introduced into the side chain. The molecular weight is spiral, the intermolecular force is small, and the silicone rubber has good resilience. As a soft mold material, it is widely used in the reproduction and manufacture of sculptures, cultural relics, toys, handicrafts, electronic appliances, mechanical parts and so on. Silicone molding technology can vividly and perfectly reproduce the original shape of a sculpture, handicraft or cultural relic, and is an ideal material for cloning cultural relics, handicrafts and sculptures. ? 1. mold species: prepare the original mold before opening the mold, which we call mold species? 2. Mold opening mode: according to the characteristics of product size and modeling structure, determine the mold opening mode. The main ways to open the mold are: a. Cover the mold; B. segmentation module; C. parting; D, a single-hole mold; E. double-hole mold; F. porous mold.

3. Preparation of raw materials: a. Silica gel; B. silicone oil; C. curing agent; D. release agent; E. vaseline; F. gauze; G. oily soil; H. Board of Directors; I.502 glue, etc.

Manufacturing method of cover mold: Cover mold is a relatively simple mold opening method among mold types, which is suitable for products with simple product structure. ? 4. Production process: mold repairing-sticking the bottom plate-spraying release agent-coating silica gel-sticking gauze-coating silica gel. The specific production process of .......... can be found in Taobao: Universal Molding. ? 5. The formula of silica gel mold at room temperature, the ratio of silica gel to curing agent at 25℃ is 100: 3. When the room temperature is high, the dosage of curing agent can be reduced appropriately, and when the room temperature is low, the dosage of curing agent should be increased appropriately. Increasing the dosage of curing agent will accelerate the curing reaction and reduce the curing time.

6. Apply silica gel once. According to the shape and size of the product, the amount of silica gel is determined and mixed with curing agent. Apply evenly with a brush or oil painting pen, and don't exert force on the clay mold to avoid damaging the model. Vacuum the vacuum box for 1 min, take it out and continue to smear it until it is uniform and the fluidity of silica gel becomes smaller. 7. Apply glue twice. Weigh silica gel and curing agent, mix them and apply glue twice. The purpose of twice gluing is to make the film uniform, and stop gluing when the flow resistance of silica gel becomes larger. ? 8. Apply glue three times. Weigh silica gel and curing agent, and apply it for three times. .........