Injection, Extrusion & Blow Molding

The plastics industry is an extremely large market that is segmented into two primary groups; Injection Molding and Blow Molding.  Injection molding is a cyclic process of forming plastic into a shape by forcing the material under pressure into a cavity.  Blow Molding is a process that manufactures hollow parts out of thermoplastic materials using compressed air.  Both of these processes involve the same machine components except for two variations.  Plastic is gathered in an “Accumulator Head’ which is located directly above the mold.  The second variation is the clamp, or “Platten,” that holds the mold closed during the Blow-Molding process.  It has a force approximately 1/12 that is needed for an Injection-Molded part of comparable size.  This is because Blow Molding only uses 100 p.s.i. of air to inflate the parisen.

Industrial Servo Hydraulics, Inc. has been servicing hydraulics in the Plastics Industry since 1969.  To date, we have over five hundred customers utilizing the Injection and or Blow Molding processes that we have provided hydraulic repairs for.  We service hydraulics being utilized in Co-Injection, Injection Compression, Live-Feed Injection, and Low Pressure Injection.  We also service hydraulics that is instrumental in Extrusion Blow, Injection-Blow, Stretch Blow, and Reheat & Blow Molding.

The manufactures of presses we see an ample amount of hydraulic repairs from are Vandorne Demag, HPM, UBE, Toshiba, Nagata, Bekum, Fisher, New Britain, Cinci, Battenfield, and Uniloy.  The type of hydraulics that we service from these manufacturers presses range and consist of Servo Valves (Parisen Control), Pumps, Hydraulic Motors (Screw Drives, Pelletizers, and Extruders), Proportional Valves (Mold Closure), Pressure Control Valves, and Rotary Actuators (Mold Closing).  MOOG, Atchley, Rexroth, Pegasus, Bosch, Vickers, Denison, Dynex, Staffa, KYB, Parker, ATOS, and Rotac make the hydraulic components we receive for service.

The OEM’s of Plastic presses not only sell their products but also attempt to service all the internal components that make a finished machine.  This leads to a few problems on the hydraulic side.  Most OEM’s of the press don’t have the capability to service a repairable hydraulic component and most notably, they will outsource the repair to the OEM of the component or to a repair house.  Under those circumstances, the final results could lead to unnecessary mark-ups from the press OEM, lengthened turnarounds due too to many parties being involved, and lastly, where does responsibility lay for the workmanship of the repair?  The easiest way to eliminate these problems is to send the Hydraulic component to a reliable source that has unparalleled knowledge, workmanship, support and on-time delivery.  Call the Industrial Servo Hydraulics, Inc. sales team to discuss how we can be a problem solver for you.