Vacuum casting (rapid prototyping and small-batch production) is a technology that involves using silicone molds, and Jucheng Precision specializes in this technique. It is an economical alternative to small-batch injection molding for plastic components.
What is Vacuum casting？
Polyurethane vacuum casting, also called vacuum casting, is a cost-effective substitute for small-batch plastic injection molding that allows for close replication of the final molded part or finished product. Typically, molds made of silicone rubber, and CNC or SLA parts serve as master molds.
The molds are capable of replicating all of the structural and surface features of the product, and over-molding can be used to replicate another product. A group of silicone molds is capable of replicating 10-15 product sets.
How Does Vacuum Casting Work?
Master Pattern Making
According to your 3D drawings, we will make a master part by CNC machining and 3D Printing (SLS/SLA). we also will consider making the master by SLA for those parts with more complex shapes and structures.
Silicone Mold Making
Silicone is poured around the master and vacuum is used to remove all air. This then is cured in an oven, at a temperature of 40℃. It generally takes 8-16 hours depending on the volume of the mold.
The resin is poured into the mold inside the vacuum chamber under computer control, and cured again in the oven. Average cure time: 1-3 hours for small parts and 3-6 hours for big parts. Remove the casting part from the silicone mold after curing. Prepare to repeat this cycle.
The Hei-Cast and Axson Vacuum Casting Resins We Have Used