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Mold making knowledge of china mold silicone rubber price
Release time:
2023-03-02 09:46
How much do you know about mold making knowledge of china mold silicone rubber price? Follow the editor to understand it briefly!
1. Select the opening at the bottom as the positioning part, turn it over and pour the plaster into the cavity, the height of which is about 30mm higher than the bottom, and dig out the pit for later positioning.
2. Paste the plasticine. Paste a layer of rice paper on the surface of the utensil, and then evenly paste a 5mm thick plasticine on the surface.
3. Plaster model. In order to support and fix the RTV mold and prevent its elastic deformation, a plaster master mold is first made outside the mud layer. Make plaster statues piece by piece according to their approximate parting surfaces. Pay attention to the positioning between the plaster molds. The plaster slurry is plaster: water=1:1.
4. TV forming mold production. The plaster is moulded in the reverse order of production, the plasticine is removed, cleaned up, parting agents are applied to the utensils and the plaster mould respectively, and then the mould is closed.
At the same time, weigh the components of the RTV according to the proportions, and stir them thoroughly after mixing. During the stirring process, RTV and ethyl orthosilicate react under the action of the accelerator organotin, which will produce low-molecular-weight alcohols. When the silicone rubber is poured, pores are formed on the body of the molding die, so it must be removed under reduced pressure. The bubble is carried out in a closed container with a vacuum of 100mmHg, and the time is about 5min. Inject the silicone rubber from which the bubbles have been removed into the cavity of the closed mold, and cure at room temperature for about 24 hours.
The above is a brief introduction to the mold making knowledge of china mold silicone rubber price.
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