AFC-Holcroft, Wixom, Mich., manufactures pusher furnace systems that range from single-row to six-row designs that are said to provide exceptionally high degree of operating efficiency, coupled with precise control over the entire heat treat process. Depending on the amount of process control needed, furnace chambers may be combined into a single unit or separated into a multi-chamber design to provide for independent and isolated chambers for maximum control over temperature and atmosphere.
Its pusher furnaces are custom-designed to meet precise needs using its proven standard building-block components. With its modular design concepts, floor plan arrangements can be made as simple as straight-through in-line single-row units, or as complex as multi-row units with side entrance and exit designs. Multiple quench systems can be provided on a single pusher furnace for increased processing flexibility. Examples: Hot or cold oil quench; Austemper/marquench – molten salt quench; Intensive water quench; Water, polymer, or caustic quench; High pressure gas quench.
The company uses a segmented rail design that allows for easy, localized replacement. Bottom-load design reduces atmosphere gas consumption and minimizes furnace atmosphere disruption. Single-ended and U-type radiant tube systems mounted horizontally or vertically are compatible with either fossil fuel burners or electric elements. The main pusher mechanism features a recirculating ball nut and screw enclosed in a tubular assembly, a highly efficient unit designed specifically for heavy loads.
