Resin helps keep engine-coolant heater running

May 22, 2003

Engineers at engine-preheater maker Kim Hotstart Manufacturing, Spokane, Wash. (www.kimhotstart.com), used Amodel FR-4133 polyphthalamide (PPA) for the firm's tank-style engine-coolant heater. The material is part of a new generation of flame-retardant PPA resins from Solvay Advanced Polymers LLC, Auburn Hills, Mich. (www.solvayadvancedpolymers.com). A cover and end cap, injection-molded from the FR-4133 resin, enclose the heater's electrical components. According to Joe Gaylord, the product's design engineer, "We can use water-cooled molds for this part with much lower temperatures, which reduces mold maintenance, relative to the oil-cooled process required by the PPS material we use for a similar product. The Amodel resin has similar properties to the PPS, but there are cost and processing advantages."

The material has a heat-deflection temperature of 574°F, and withstands the 180°F coolant temperature it sees during preheating or when the engine is running. Also, it quickly crystallizes in water-cooled molds, allowing for fast cycle times using molds as low as 150°F.

The engine-coolant heater sees action on small, water-cooled reciprocating engines, up to four cylinders and 2.5 liters in displacement, used on small construction or excavation equipment working in cold temperatures.

Sponsored Recommendations

NEW Low Profile, Ultra Compact Power Supplies

March 13, 2024
Learn more HERE about Altech's Power supplies!

Altech's Liquid Tight Strain Relifs Catalog

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

Industrial Straight-Through Cable Gland

March 13, 2024
Learn more about Altech's cable glands and all they have to offer for your needs!

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!