Resin-handling line bars contamination
Pittsburgh-based Conair Group is introducing new polycarbonate resin-handling systems for optical disc replication, and two new sizing tanks for tubing or profiles.
Also new from Conair: an upgraded mold-temperature controller.
Conair developed the Mobile Dryer/Conveyer with its Asian partner, Kawata Manufacturing. Optical-grade PC must be dried to less than 0.01 percent residual moisture and delivered to the molding machine feed throat without allowing any contamination.
PC must be dry to achieve its crystal clarity.
The Conair system includes a Super Sack bin, a vacuum receiver, an insulated drying hopper, a dehumidifying dryer, and a closed-loop dry-air conveying system.
K-Loader material receivers at each machine hold just a small volume of material.
Conair's new vacuum sizing tanks are called MT and MTP. They feature a new air-water separation system with separate water and air pipes connected to a closed-water reservoir. A vacuum pump evacuates the air, not the water, to reduce surges in vacuum levels.
The MT is intended for sizing tubing or hollow profiles. The MTP includes a profile manifold that applies vacuum and cooling water directly to tooling for profile sizing.
Both can be sized to handle tubes or profiles as large as 8.6 inches in diameter. Tanks are available in lengths of 7-22 feet, with as many as five vacuum compartments.
The vacuTrac mold-temperature controller includes a three-way ball valve that lets processors balance the floor of coolant with the negative pressure needed to prevent leaks in molds that become cracked or otherwise inoperable.
When a leak happens, a pump/venturi tube produces negative pressure in coolant lines, drawing air through the cracks so the mold works without leaking, Conair said.
Tel. (412) 312-6000, fax (412) 312-6320.
Gate allows shorter die-changing time
Unlike standard four-bolt gates, Akron Extruders Inc.'s new Flex-Lok gate can change dies or screen packs by loosening one nut.
A torsion spring acts as a counterweight to keep the gate from flying open until the operator is ready to remove the die from the gate. That controlled motion allows operators to change dies and close the gate with less effort, the company said.
Akron Extruders is based in Canal Fulton, Ohio.
Tel. (330) 854-4111, fax (330) 854-6066 or e-mail [email protected] juno.com.