Cost of operatiopn between an electric press and a hydraulic press

[Shearstressin me out]

All,

We currently have a varieties of electric and Hydraulic presses at our production facility.

I was wondering what the best way to determine the cost of production (strictly from the machine standpoint) for a electric press versus an hydraulic press.

I.E. if the same tool with the same processing conditions was ran in an electric press versus an hydraulic press what would be the cost difference? How could one find this cost difference?

[chrisprocess]

At previous company we ran a lot of thin-wall multi-cavity pipette tips that required incredibly fast injection speeds. The machine manufacturer explained a hydraulic injection (w/ accumulator) would use much less energy than an electric press at those high injection speeds. So it might depends on the specific process in question. There's probably some trade-off at some point based on processing conditions..

I wonder if there's a device you can use to monitor energy consumption at the machine - and compare electric vs hydraulic running the same molding conditions.

[iautry1973]

I know some manufacturers will install a device inline to measure energy consumption. You can also look at scrap and cycle time.

[rickbatey]

Ask your local power company to help with readings. The power company should help and you can ask about rebates from them plus your state.
But there are intangibles to consider like NOT having to expand your chiller and tower systems due to reduced loading.
Rick

[Javier]

Hi
Really today, there are three types of machines, fully hydraulic, hybrid and all electric.
The energy consumption of the resistances is the same, also that of cooling water.
For the rest, regarding the hydraulics, there were small reductions in hybrid machines and depending on the duration of the refrigeration cycle there were greater reductions in all electric machines.
Today, with power reducers using Sinusoidal Motor Efficiency Controllers for the hydraulic pump, the energy consumption of a hydraulic and an all electric machine is the same.
The cost of reforming a hydraulic machine in all electric is 3 times that of installing an efficiency controller. The return on investment of the latter option is less than one year, 3 times less than the installation of servomotors. The time of modification of this modification is about 20 minutes, while the installation of servomotors and drivers could take a week.