A new "shot-pot" extrusion blow molding machine from Graham Engineering Corp., York, Pa., is being used to make industrial containers. This type of machine, which uses a "shooting pot" (similar to an accumulator head) to deliver multiple parisons, was previously used mainly to make lightweight 1-gal milk jugs. As we reported in May, the versatile SPM Series was introduced at the NPE show in Chicago. The new SPM 4.5-8 model, sold to a producer of 1-gal and 3-qt chemical containers, features a larger grooved extruder (4.5-in., 28:1) and shooting speed greater than 1000 g/sec (up to 3000 g/sec optional). The eight-head unit has 9-in. center spacing, 100-point parison programming, three-point front die adjustment, hydraulic ram-down pre-finish, and tool-less blow-pin adjustment. The shot-pot machine can produce heavier bottles than conventional reciprocating screws due to greater shot capacity, which is independent of extruder diameter, says Graham. It also features faster parison drop and overall cycles. This model runs an 11-sec cycle producing 44 containers/min. Other features include quiet-running gear motor and a continuous screen changer that is unavailable on traditional reciprocating-screw machines.
Graham Engineering Corp.
1203 Eden Rd. York, PA 17402
Phone (717) 505-4912 Fax (717) 846-1931