B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/707
B29C 45/67 (2006.01)
Patent
CA 1205965
A B S T R A C T A hydraulic actuator assembly for a push-type die clo- sing unit of an injection molding machine which has a cen- tral, internally bypassable power piston, lateral cylinders for rapid opening travel and a rearward stationary plunger for rapid closing travel, the lateral travel cylinders and the pressure spaces of the power cylinder producing a dif- ferential effect with an small external flow volume of fluid consumed and discharged during rapid opening and closing trav- el and a much larger internal flow volume passing through a flow connection between the cylinders. A program-controlled proportional-response throttle valve in the flow connection gives an accurate and steady control over the travel speeds, especially during deceleration. The throttle valve also makes it possible to obtain a forcible initial die opening movement.
438956
Hehl Karl
Macrae & Co.
LandOfFree
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