Large Recip-Screw Machine Boasts Numerous Upgrades

Although it was first introduced at NPE2018, there’s lots new to see on the RS-90 reciprocating-screw blow molder displayed by Rocheleau Tool & Die Co. This 90-ton machine is capable of six-cavity gallon production or up to 14 cavities of smaller items. With a 90-mm extruder, it can put out 750 lbs/hr of HDPE. The extruder has a VFD electric drive and other movements are hydraulic. This is the company’s largest machine, targeting HDPE and PP dairy, consumer and industrial containers.

Clamp side-shift is a new option on the RS-90, which enables molding containers with off-center necks while maintaining even wall distribution. Applications include motor oil, antifreeze, cooking oils, drinking water, and pet kibble and cat litter.

The machine can be automated inline with a VT-3 deflash automation package, which has been modified for this show presentation to enable impact trimming of larger containers like 35# and 2.5-gal F-style bottles. (Although not new, Rocheleau is also exhibiting the HT-1 Takeaway Spin-Trimming Automation Station with control box for stand-alone operation. It can be used inline as a retrofit with Rocheleau or other makes of blow molders.)

The machine on display features new Process Monitor Controls for functions such as hydraulic pressure, temperature and level; accumulatory hydraulic and gas pressure; parison programmer hydraulic pressure and temperature; extruder melt temperature and rpm; extruder shot pressure and back pressure; mold water pressure, supply and return flow and temperature; clamping pressure; and air pressure for supply, blow and preblow. Also new are options for simplifying diagnostics with easy-to-use help screens, digital operator manuals, live alarm diagnostic checks and preventive maintenance through the operator terminal or a smartphone.