Multiple Drop Cold Runner Blocks
Cold-runner systems provide significant manufacturing advantages and cost savings for the processing of liquid silicone rubber (LSR) injection molds. A reduce sprue, shorter cycles and set-up times along with a reduced load on material are achieved through the use of this technology. Multiple Drop Cold Runner Blocks provide even greater advantages since they allow savings of molding material, to maintain similar rheological history in the product, and to reduce operator time in removing and cleaning the wasted compound. They also facilitate automation.
A cold runner unit keeps the compound undercured and becomes an extension of the machine injection chamber. Depending on the molds layout, the cold runner unit can be shared with different pre- engineered molds to work together. In some cases, short cured runners are necessary to take advantage of a product layout. Cold runner units can have independent cooling channels for different areas of the mold and/or the nozzles.