PT ZONE: Common Questions
Answers to Common Questions
Whether you’re wondering about output, energy use, controls, maintenance or another topic related to all-electric injection molding machines, Milacron engineers have a lot of expertise and experience to share. We’ve been at the forefront of this technology since the very beginning. Here are answers to some of the most common questions about all-electric injection molding machines. If you don’t see your question answered here, please don’t hesitate to ask us today
What are the differences between electrics and hydraulics during set up?
How long can I expect an electric machine to last?
What spares should I have on hand?
Normal items such as grease, screw tip assembly, heater bands and thermocouples.
What are the common maintenance needs?
Why are the machines cleaner?
The elimination of oil, valves, hoses, etc. requires less housekeeping since leaks are avoided.
Hydraulic systems must have the ability to “breath” when the oil is flowing in and out of their oil reservoirs. This frequently introduces some amount of oil mist through the tank breather into the machine environment, which then adheres to all surfaces.
What are the reasons for cycle savings?
Will I have a problem with high pack pressure and times?
Newer electric machine designs and technology today have motors and drives with more power capability than ever before. But while an electric machine being overmatched has become a very infrequent issue (less than 1%), there are still cases where the combination of part design and resin types can cause the injection motor to become overloaded. If there’s some uncertainty about this possibility in a given situation, machinery manufacturers including Milacron frequently have some alternative design combinations to address the issue. If you have a concern, you should share the details up front with your machine manufacturer.
What is the maintenance cost for a typical all-electric machine?
With good maintenance and proper operation, the annual cost has been under $500 per year.
How long do belts last?
Belt technology has advanced over the 30 years of all-electric technology, and today’s belts can be expected to last +10 years. Belt failures are mostly caused by incorrect machine parameter settings that cause excessive stress.
Should you maintain or replace equipment?
Many factors need to be considered, and every customer will have different circumstances in making a decision to either maintain or replace their existing hydraulic machines. These factors can include:
Why are the machines more repeatable?
How much energy can I save?
There are several answers to this, depending on the age and type of technology used in the machine being replaced and the molding cycle conditions. Ultimately, the best way to analyze this is to perform an energy audit.