What is vacuum casting?
The vacuum casting is use of the original sample to make a silicone mold, and is poured under vacuum to make the same piece as the original sample. The vacuum casting speed is fast and the cost is low, which greatly reduces the development cost, cycle and risk of the product.
1, select materials
Currently making materials for silicone molds:1,ordinary silicone: color translucent, milky white, light yellow, gray and so on. Hardness is usually between 40-70. More used are mobile phone buttons, miscellaneous items and so on.
2, meteorological glue, color: transparent. Commonly used between 40-60, due to the transparency of this material, strong tensile strength, high cost. generally used in high-end products that require high elasticity.
2,Product materials: POM, ABS, PC.
1: PC, good heat dissipation performance, uniform heat dispersion; high impact strength, good dimensional stability, colorless and transparent, good coloring, electrical insulation, corrosion resistance, wear resistance, but poor self-lubrication, It has a tendency to stress cracking, is easily hydrolyzed at high temperature, and has poor compatibility with other resins. High strength, high temperature resistance, long-term use can withstand 130 degrees Celsius temperature environment, good transparency, non-toxic. Suitable for making small instrument parts, insulating transparent parts and impact resistant parts.
2: POM, light yellow or white, thin-walled part is translucent, POM strength, high stiffness, good elasticity, good wear and wear resistance, excellent mechanical properties, high mechanical strength and rigidity; highest fatigue strength; environmental resistance Good resistance to organic solvents; strong resistance to repeated impact; wide temperature range (-40 ° C ~ 120 ° C); good electrical properties; good recovery; self-lubricating, good wear resistance.
3: ABS, ABS has better comprehensive performance, high impact strength, good chemical stability and good electrical properties; high impact, high heat resistance, flame retardant, enhanced, transparent, etc.; fluidity is better than PMMA, PC, etc. Good flexibility; suitable for making general mechanical parts, wear-resistant parts, transmission parts and telecommunications parts. Most of the automotive interior panels are made of ABS.
3, silicone mold production: making silicone mold, after drying, the silicone mold is cut open, and the prototype is taken out.
4. injection: Inject liquid plastic material into the silicone mold and wait for drying.