Batch Oven used for Curing Molded Material
Wisconsin Oven designed and manufactured a natural gas fired walk-in batch oven used to cure molded material. The oven has work chamber dimensions of 15’0” wide x 15’0” long x 8’0” high and a maximum operating temperature of 500º F.
The oven is constructed with 6” thick tongue and groove panel assemblies, 20 gauge aluminized steel interior and ductwork, with a vertical lift, pneumatically operated door. The heating system features an Eclipse series AH 150 combustion burner rated for 1,300,000 BTU/hr. The recirculation system has a 40,000 CFM @ 30 HP blower, and utilizes combination airflow to maximize heating rates and temperature uniformity.
A 1,000 CFM @ 1 HP exhaust blower was included and the oven is rated for class A operation (as defined by NFPA 86) for when a solvent is introduced during heating. The fresh air inlet and exhaust outlet feature a motor operated (modulating) system. This type of system provides the customer with faster cooling capabilities and the ability to shorten their required purge time because the damper system can be fully open during the purge cycle.
In addition to the oven, a 13’ wide x 13’ long load car with a 40,000 pound load rating and a chain drive system were provided. The mold with the material to be cured will be placed on the load car and loaded into the oven via the chain drive system which will be imbedded in the customer’s floor.
Oven temperature uniformity of +/- 5° F at 302° F was required. The temperature uniformity results achieved were better than +4° F. The oven has a UL certified NEMA 12 control enclosure with IEC style motor starters, push buttons, and pilot lights. The temperature is controlled by a Honeywell DCP100 programmable temperature controller with 8 programs capable of 16 ramp/soak segments, and over temperature protection for the oven is provided by a Barber-Colman 7SL high limit controller. The oven also includes over temperature protection for the process with a Honeywell UDC 2500 high limit controller.
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