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Electrical ejector solutions in injection-molded forms
A leading company in the field of precision injection molding for the medical industry was faced with the challenge of replacing hydraulic drives in injection molds with efficient, electric drive solutions. As part of the collaboration with Parkem, Exlar electric cylinders were integrated into various injection molds for this customer to ensure the precise and reliable functioning of the ejector and unscrewing mechanisms.
Machine 1: Two GSX electric cylinders for driving the ejectors
In the first injection molding machine, two GSX50 electric cylinders are used to drive the system's ejectors. These electric drives replace the hydraulic concept and ensure greater energy efficiency and more precise motion sequences. As soon as the mold is opened, the two GSX electric cylinders ensure that the ejectors push the plastic parts, such as syringes and needle protective caps, out of the mold quickly, gently and precisely via guides, without damaging them. This quality standard is a central element in the production process of our customer, who places strict demands on precision and reliability.
The two GSX50s each apply up to 35 kN of force and are also very compact, since the servomotor is integrated directly into the planetary roller screw.
Machine 2: Tritex T2M090 electric cylinder for the unscrewing unit
A Tritex actuator from Exlar is used in the second injection mold. It is characterized by the fact that the servomotor and servodrive are integrated directly into the electric The Tritex electric cylinder drives the thread unscrewing unit via a rack and pinion mechanism, which removes the thread from the mold. Typical parts produced in such systems include syringe barrels and components for infusion systems. Here, too, replacing the hydraulic system with an electric solution was an important step:
• A clean solution without oil is particularly suitable for the sensitive medical sector
• A large increase in the efficiency of the system
• A massive reduction in maintenance costs and effort
Clean, sustainable and energy-efficient with electric drive technologies
These two drive concepts on the injection molds once again reflect our core competence by replacing hydraulic drives with electric ones. The use of electric cylinders offers many advantages for mold makers and end users:
- Higher energy efficiency and thus lower production costs
- Further cost reduction in the area of maintenance and downtime
- Clean and leak-free operation, particularly in the medical industry
- More flexibility and precision for motion sequences and thus optimized production processes
- Higher productivity and quality of the parts to be manufactured
- Reduction of environmental pollution and conservation of resources
