橡楚技术团队 8 min read
Dual-color/dual-hardness LSR injection molding combines two different colors or hardnesses in a single production cycle.
Dual-color/dual-hardness LSR injection molding technology can combine two different colors or different hardness silicones in a single production cycle, widely used for high-end silicone products requiring soft-hard combination or functional zoning.
First color/hardness injection, then core rotates 180 degrees for second injection. Suitable for symmetrical structures with precision rotary positioning.
Two injection units inject simultaneously or sequentially through special nozzles. Suitable for encapsulated structures.
First color/hardness molded in first mold, semi-finished product transferred to second mold for completion. Suitable for asymmetric structures.
Cross-linking speeds of two LSRs must match. Interface temperature control ensures co-crosslinking. Excessive penetration causes interface blurring.
Viscosity differences between LSRs affect filling. Independent injection speed and pressure adjustment needed. Flash control is a key challenge.
Curing curves should be similar. Fine-tuning through catalyst adjustment ensures both materials reach demolding strength simultaneously.
Dual-color/dual-hardness LSR injection molding provides an efficient solution for multi-functional integrated silicone products. Mastering equipment configuration, process control, and mold design is essential for producing high-quality dual-color products.