Godfrey & Wing reported it shipped and installed its first HVLV vacuum impregnation system in China for Tier 1 supplier of automotive diecastings, at Dalian. It said the front-loading vacuum impregnation machine, manufactured in the U.S., would treat four-cylinder engine blocks and transmission components for U.S. and European automakers operating in China.

The High-Value/Low-Volume (HVLV) system that Godfrey & Wing developed to seal cast parts uses a dry vacuum and pressure processing sequence to overcome porosity. It processes one cylinder block per cycle in a lean and ergonomic operation that requires no overhead cranes, equipment pits, or platforms. It occupies 84 square feet, with no special infrastructure. It can be installed anywhere in a facility, according to the developer.

Godfrey & Wing explained that its Chinese client is a high-volume supplier of engine blocks to General Motors Corp, and was assigned to develop a strategy for sealing the castings to match the 1 cc/min leak standard.  “Outsourcing was not an option,” according to Godfrey & Wing, “as the OEM wanted to reduce shipping and inventory costs while eliminating the risk associated with outside processing (damage and contamination), not to mention the unpredictable recovery of castings.”

Based on Godfrey & Wing’s impregnation technology, and the company’s own experience with GM’s leak-test standards for powertrain components, they sought a proposal from G&W for the process equipment.