Tecnapol Helps Auto Parts Manufacturer Make Large DCPD Truck Hoods
An automotive parts manufacturer in Mexico wanted to make 50-pound hoods for large over-the-road trucks using Metton® liquid molding resin, which is composed of two, low-viscosity DCPD streams injected into a closed mold.
The challenge: How to deliver shot sizes up to 5,000 grams/second, while insuring that no air entered the system and all key processing parameters of ratio control, temperature, pressure and flow rates were maintained.
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- Big Mold
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- Truck Hood DCPD Mold
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- DCPD Press
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- {:mx}Tapa Motor Camión DCPD {:}{:en}DCPD Truck Hood{:}
Tecnapol was in charge of commissioning, training, and set-up of a Polyurethane Process Industries (PPI) supplied Impianti OMS EcoMaster 400/200 reaction injection molding (RIM) machine, specially equipped to deliver the Metton® to two high-pressure mixheads without nucleation or bubbles in the materials. Maintaining low pad pressure and slow agitator speeds were critical. Low-pressure feed pumps were used to maintain head pressure on the metering pumps.
The two mixheads impingement mixed the activator and catalyst at a 1:1 ratio and injected the mixture into a closed mold mounted to a 120-ton, vertical hydraulic press. TecnaPol programmed the PPI supplied press, which was designed with 10- by 12-foot platens that open like a book for easier mold preparation and unloading of the finished truck hoods.
A Tecnapol customized closed-loop control system, which self-corrects all key processing parameters and allows remote access troubleshooting, maintains full process control.