Hotrunner System Solutions

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The new dimension of valve gate precision

  • Electric drive valve gate
  • Electric drive valve gate

The step motor technology and the control unit of the EWIKON electric valve gate give the user full control of the valve pin movement. Compared to electromagnetic concepts the system offers decisive advantages: valve pins can be positioned and operated independently from each other with highest precision. Process parameters such as stroke length, valve pin speed as well as opening and closing time can be adjusted flexibly. The closing force remains constant during the entire valve pin stroke an can almost be doubled by reducing the valve pin speed just before closing the gate. This is ideal when processing rapidly freezing materials. The EWIKON electric valve gate is cleanroom compatible and therefore perfectly suitable to be used for applications in the medical industry.

Product features:

  • Combinable with all HPS III-S nozzles
  • Step motor technology, high closing force
  • Precise valve pin positioning, individual setting of process parameters such as stroke length, valve pin speed and opening and closing time
  • Absolutely simultanous opening of the valve pins in multi-cavity systems
  • Cleanroom compatible
  • Very simple assembly and connection technology

Unique Feature: Several valve pin positions within one cycle

Unique Feature: Several valve pin positions within one cycle

As a unique feature the EWIKON electric drive can actuate several valve pin positions within one moulding cycle. This option broadens the range of applications considerably and offers new methods of resolution for injection moulding applications, especially when considering the growing tendency to integrate additional functions into moulds. Several applications where the application requires the valve pin to move to three positions within one cycle have been realised so far.

Option: Encoder for permanent monitoring of valve pin position

Option: Encoder for permanent monitoring of valve pin position

In order to achieve an even higher process reliability for high-precision valve gate applications e.g. in the medial industry, all electric drive unit sizes are available with optional encoders enabling a permanent monitoring of the valve pin position with an accuracy of 1/100 mm.
If there are any deviations, the valve pin concerned is readjusted automatically. Should this not be possible due to a gate blocked by impurities, an error message appears after a definable number of failed attempts. If requested, the drive unit concerned is switched off completely.
Up to 32 drive units can be controlled simultaneously via the high-performance and comfortable touch screen control unit.

Further information

Electric drive valve gate technology product brochure

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Medical hotrunner solutions

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 HPS III-NV main catalogue

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Article, Kunststoffe 11/2008:
Electric valve gate system
in steering column production

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