What is the key point of processing technology of vacuum casting for small batch production?
In prototype processing, under what circumstances do we usually choose a small batch of vacuum casting processing process? This process is used when the material is soft rubber or rubber or plastic products are produced in small quantities. So what is the key point of small batch vacuum casting processing technology?
When we are doing small batch prototype processing, which may use the duplicate mold, so we should pay attention to what requirements in the duplicate mold, so as to ensure the success rate of the duplicate mold.
1. Silicone is mixed with curing agent evenly. The appearance of the mold silicone is flowing liquid, component A is silica gel, and component B is curing agent. Forexample: take 100 grams of silicone, add 2 grams of curing agent (Note: silicone and curing agent must mixed evenly, If you don't mix it well, Maybe one part of the mold will have solidified and the other part will not have solidified,The uneven drying and curing of silicone will affect the service life of the silicone mold and the number of turning over the mold, and even lead to the abandonment of the mold.
2.Vacuum exhaust bubble treatment
The vacuum-pumping and exhaust bubbles are carried outAfter the silicone and curing agent are mixed evenly, Under normal circumstances, The processing of Vacuum should not be too long , not more than 10 minutes, If the vacuum is too long, the silica gel immediately solidifies, resulting in cross-linking reaction. As a result, the silica gel becomes a piece by piece and unable to apply brush or perfusionthen need to take silicone to do again.
3.Prototype factory painting or operation process:
Drain the silica gel through the bubbles. To brush or perfusion over the product(Note: the product or model to be copied before pouring silica gel must be hit with mold release agent or isolation agent).Then the silicone brush to surface of the product,Be sure to brush evenly,After 30 minutes, apply a layer of gauze and weft cloth to increase the strength and tension of the silicone. Then brush with a layer of silicone, and then paste a layer of gauze fiber weft cloth, so that after two times can be.Only in this way, the service life of the silicone mold and the number of mold turning over can be improved, which can save costs and improve efficiency.
4.Operation method of pouring mold or pouring mold:
Injection mold or injection mold is used for smooth or simple products which to saving time and manpower.The product or model to be copied shall be enclosed by plastic plate or glass plate, and the vacuum-pumped silica gel shall be directly poured into the product. After the silica gel is dried and shaped, the silica gel mold shall be cut open with a blade according to the parting line and the water outlet shall be opened to take out the product, and the mold is formed(note: the injection mold is generally made of silicon gel with soft hardness, so that it is easy to de molding without damaging the products inside the silicone mold.
5.Production of external mold
The method that USES commonly is to will die all round，To enclose with plastic or wood，It is to use plaster to fill mould。Another way to use resin coating brush, brush a layer of resin paste a layer of fiberglass cloth, and then brush and paste again, repeated two or three layers can complete the mold.
Duochuang prototype factory has rich processing technology in small-batch vacuum casting processing technology, and the equipment is 2.4 meters long, which can do large-size vacuum casting processing, in addition, we can also do CNC machining, 3D printing , welcome to call us !
Contact:
Cary
Phone:+86 17825204146
Website:www.dcprototype.com
Email: cary@dcprototype.com
