Machinery Upgrades For LSR and PET

New screws for LSR, micro-molding, and PET preforms, as well as an extended daylight option and a double-pump option that lets users overlap machine operations, were recently introduced by Boy Machines Inc., Exton, Pa.

New screws for LSR, micro-molding, and PET preforms, as well as an extended daylight option and a double-pump option that lets users overlap machine operations, were recently introduced by Boy Machines Inc., Exton, Pa. A 14-mm, 18:1 screw is offered for molding small LSR parts on Boy’s 12 series (14.5 tons) and 22 series (24.5 tons). The company also developed a special shut-off nozzle for use with the screw. Before now, Boy offered screws as small as 18 mm for LSR on presses up to 38.6 tons. Boy also has a new 12-mm screw for micro-molding on its 12 series. It can produce parts as small as 0.001 g. The standard 14-mm screw can make parts down to 0.2 g. Also new is a double-pump option that allows overlapping part ejection and mold opening to trim cycle time. The unit uses the same oil volume as a single pump unit. The second pump is smaller than the main pump. A single drive controls both pumps. Boy also has an option for its largest press, the 90 series, to increase the daylight to 900 mm. The Boy 90 A (100 tons) has a standard daylight of 725 mm. It is available in a new version for molding PET preforms.