Abstract: In an injection molding system a cooling manifold system includes a first manifold disposed adjacent to a second manifold. Supply valves are arranged to selectively pass a coolant from the first manifold respectively to each of a plurality of mold cooling circuits and a plurality of return valves are arranged to selectively pass the coolant from the plurality of mold cooling circuits to the second manifold when one or more of a plurality of return valves is in an open position. Valve pairs associated with a common mold cooling circuit are mechanically linked so that operation of a supply valve and return valve can be concurrently performed from one side of the manifold system without interference from a plurality of hoses attached to the supply and return valves.

Abstract: A floating, non-conductive hand tool such as pliers or channel locks for use by those working proximate to water or an electrical source. The tools are extremely durable, lightweight, and have an internal cavity capable of holding a gas or a light weight polymer foam material to substantially reduce the overall density of the hand tool. Alternatively, the handle ends of the tool may be encased with a low density sheathing material used either independently or in conjunction with the aforementioned internal cavity to reduce the density of the tool.