Vacuum Brazing Die Inserts

Solar Atmospheres vacuum brazed 36 cavity die inserts for plastic in an injection mold die.  Comar Plastics, Buena, NJ, refurbished inserts to save the time and expense of purchasing new parts.

The refurbished H13 inserts were machined and brazed into the injection mold cavity.  Copper wire pre-forms were selected as the alloy filler to ensure braze joint uniformity.  Heat treating of the H13 material occurred during the braze run and was followed by two vacuum tempers to attain hardness specifications of HRC 52-54.  Solar was able to accomplish the braze work in less than three working days to meet the manufacturer’s production schedule.  Parts were then plunge EDM’d to final size.