Hydro-Pac, Inc.

Gas assist injection molding

Gas assist injection molding

Gas assist injection molding is a relatively low-pressure process (<10,000 psig) utilizing nitrogen gas to apply uniform pressure throughout the molded plastic part. Our experience includes manufacturing reliable, low-maintenance compressors and compressor systems for applications ranging from 1,500 to 10,000 psig (10.3 to 69 MPa).

FEATURES

• Robust, reliable, low-maintenance design.
• Non-lubricated piston. Does not contaminate the process gas.
• Custom control and piping systems can be quoted for any machine.
• Compressor systems can run unattended and be checked on for periodic maintenance.
• Compressors feature an intensifier with electro-hydraulic power units. This eliminates the need for drive air.
• Patented free piston design allows for maintenance on the high-pressure seals without removing the hydraulic section.
• Water-cooled intensifier allows higher •compression ratios which reduces the number of stages.
• Hydro-Pac gas compressors work over a wide range of inlet pressures. In many cases inlet pressure regulators are not required.