Automated TRU TEMP® CNC Black Oxide Finishing System

Description

CNC (computer numerical control) has arrived for black oxide finishing using the patented and proven TRU TEMP® low temperature, non-polluting finishing process.
    This new TRU TEMP CNC line utilizes an integrated programmable hoist and tank line to automatically process iron and steel components with a high quality black oxide finish. Designed to operate as a self controlled unit that eliminates the labor costs required with manual hoist lines, this CNC system is highly repeatable, eliminates process guesswork and has large output capabilities. A standard, 110 gallon tank line system has an output capacity of 4-6000 pounds per 8 hour shift. The system can be sized and configured to accommodate any volume of work or production circumstances.
    Hoist and superstructure have a 500 lb. load capacity and operates by Allen Bradley PLC digital control with a manual joystick backup. Process tanks are extrusion welded, ¾ inch polypropylene with gusset supports under the top rim and perimeter girthing. Tanks have setdown saddles for automatically centering part loads accurately. Tanks can be laid out in two ways; with pickup and drop-off points at opposite ends of the line or with a single load/unload station with the hoist pickup and drop-off at the same point. The process program can handle up to three loads concurrently, for a maximum throughput of five loads an hour.
    The TRU TEMP CNC hoist processes parts through the following station sequence:  Station 1: Load Pickup; Station 2: Alkaline Soak Clean; Station 3/4: Double Counterflow Rinse; Station 4: Mild Acid Surface Prep; Station 5: Cold Overflow Rinse; Station 6: TRU TEMP Black Oxide; Station 7: Cold Overflow Rinse; Station 8: Rust Preventative Oil; Station 9: Load Dropoff. Process cycle is 28 minutes.
    The TRU TEMP finish produces a satin black magnetite coating just 0.5 microns thick (20 millionths) with no effect on part dimension or material hardness. The finish withstands up to 100-200 hours of neutral salt spray (ASTM B 117) or several hundred hours of humidity (ASTMD1748), (verified by independent testing). The high level of corrosion protection is important for both part storage and shipment in corrosive atmospheres including ocean shipment.

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