Vacuum casting process achieves rapid transformation from design to physical product through four key stages: prototype creation, silicone mold fabrication, product replication, and surface treatment. This process is ideally suited for small-batch, multi-variant production needs.
1. Prototype Creation: Establishing the Master Template
The prototype serves as the "master" for duplicate molding, typically produced via 3D printing or CNC machining. After completion, the prototype undergoes precise polishing and defect repair, followed by application of a release agent to prepare for silicone mold formation.
2. Silicone Mold Fabrication: Building the Replication Medium
A mold frame is constructed according to the prototype's dimensions, with the prototype securely fixed and gaps sealed. Room-temperature vulcanization (RTV) silicone is mixed with curing agent at a 100:3 ratio, vacuum-degassed, and poured gradually to ensure complete detail replication. Curing occurs at 25-30°C for 6-10 hours, after which the mold is trimmed to remove flash and air bubbles, treated with release agent, and prepared for use. Each silicone mold can typically be reused approximately 10 times.
3. Product Replication: Achieving Batch Production
Based on client specifications for material and color requirements, customized formulations are prepared and batch replication is carried out systematically.
4. Surface Treatment: Enhancing Texture and Functionality
Initial sanding removes burrs and scratches, followed by coating processes: spray painting for multi-material compatibility, powder coating for enhanced protection. Final functional treatments include screen printing for logos, laser engraving for detailed graphics, and electroplating to improve both performance and aesthetics, ultimately delivering superior appearance and functionality.
