Composite Curing Oven Requirements.pdf

Composite Curing Oven Requirements

Use: The application for this equipment is vacuum assisted composite curing of aircraft parts. The equipment will be installed indoors, on level concrete and in an industrial environment. If the equipment arrives in multiple pieces it will need to be assembled, tested and commissioned on site.

Oven and software training required from manufacturer.

Oven needs to include (12) automated vacuum ports, (12) transducer ports and (16) type "J" thermocouple jacks inside the oven.

(12) 1/2" NPT through wall vacuum ports with air piloted electric valves & resin traps on oven exterior.

Ports will be equally spaced down both sides of the oven and connected to a common 1" NPT header pipe. The header pipe will include an isolation valve for each side and one at the main connection to the source. Ports will be terminated inside the oven with high temperature quick disconnect fittings.

(12) 1/2" NPT vacuum transducer ports. Each port must include a high temperature quick disconnect fitting on interior and a vacuum transducer on exterior. All transducers will be wired directly to the control panel for continuous monitoring and recording.

(16) type "J" thermocouple jacks located inside the oven. These will be divided into two 8-port jack panels and located one on each side of oven, as close to the doors as possible. All jacks will be hard wired directly to the control panel for continuous monitoring and recording.

1/2" NPT blank port located within 3" of the process and high limit thermocouples to be used for validation. Port include standard pipe cap on the exterior.

Each vacuum port needs to include a high temperature quick disconnect fitting on the interior and an air piloted electric valve with resin trap on exterior. Operators select which vacuum port to use when setting up the recipe. All vacuum ports are connected to a common 1" NPT header that is directly piped to vacuum source. The vacuum transducer ports must also include a high-temperature quick disconnect fitting on the interior. All thermocouple jacks and transducers will be hard wired directly to the control panel for continuous recording.

DESIGN DATA:

Utility: Electric, 480/3/60

Natural Gas: 700 CFH @ 2 PSI

Compressed Air: 80-100 PSI (required for vacuum valves)

Electrical Classification: NEMA 12, indoors

Maximum Temp: 500 F

Minimum Temp: 200 F

Heat Capacity: Minimum 700,000 BTUH

Workspace Volume: Minimum 624 cu. ft.

Heater Box Location: Top

Number of Heater Boxes: 1

NFPA 86 Class: A

Max Solvent Load: 0.25 gallons/batch

Temperature Uniformity: +/- 10 F at 450 deg F per standard 9-pt survey, empty oven

DIMENSIONAL PARAMETERS

Estimated Workspace Dimensions (can vary, but must be minimum 624 cu. ft.)

Width: 96” Wide x 144" Long x 78" High

Estimated Overall Dimensions (maximums):

154" Wide (includes control panel and vacuum valves) x 156" Long x 180" High

ELECTRICAL DESIGN PARAMETERS

Power: 480/3/60

Disconnect: 60 AMP

SCCR = 5 kA

Motors: Circulating Fan: 20 HP

Exhaust Fan: 2 HP (inverter duty)

AIRFLOW PARAMETERS

Airflow Pattern: Dual

Circulating Fan: Minimum 30,000 CFM

Air changes/min: Minimum 45

Exhaust Fan (variable speed): 750 CFM normal heating, 2,000 CFM purge/cooling

Zero speed switches on circulation and exhaust fans in place of standard differential pressure switches.

CONSTRUCTION

Interior: 16 gauge aluminized

Exterior: 18 gauge Cold rolled steel

Floor: 12 gauge plate, no insulation

Doors: bi-parting hinged doors, one end, with explosion venting latches, 12” x 12” window on each door

Lights: Two (2) high temperature internal oven lights with on/off switch on main control panel

Insulation: 4”x 6” mineral wool

CONTROLS

Programmable logic controller (PLC) with Touchscreen and composite curing programming software

Process Temperature: graphical recorder/controller to record and display variable temps and output within the oven

High Limit: control in place to indicate temp and alarm when approaching max temp output for oven

Full Voltage Lockable Disconnect

Heater Control: Silicon controlled rectifier (SCR)