I-Mold Increasing efficiency in demoulding rotating cores

Editor: Steffen Donath

I-Mold has developed a line of compact rotary cooling units that facilitate the cost-efficient integration of rotating cores into injection moulds.

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I-mold’s new compact rotary cooling device provides a reliable asolution for demolding rotating cores.
I-mold’s new compact rotary cooling device provides a reliable asolution for demolding rotating cores.
(Source: I-Mold)

The device’s main components are a stator designed for twist-lock installation which also carries the coolant hose connectors, and the rotor which supports the cooling pipe as well as the thread for attaching the rotating core. Available as a standardised element, the unit reduces the development cost and effort otherwise associated with the use of custom solutions. Moreover, it eliminates problems in use caused by cooling water leaks, as each unit comes leakage-tested and warranted to be leakproof by I-Mold.

For multi-cavity moulds, it is possible to connect up to four rotary cooling units in series. Additional groups of four can then be arranged in parallel, paving the way to design compact moulds with a large number of rotating cores. Thanks to this capability plus the advanced cooling performance that supports short cycle times, these devices help to increase manufacturing productivity. The new rotary cooling units are suitable for all common mechanical, hydraulic or servoelectric rotating core drives, the company states.

Depending on core dimensions and cooling power needs, I-Mold informs, the unit is offered in two different sizes. The SDK-034, rated for a 2 – 6 mm cooling pipe diameter, supports particularly close cavity spacings of only 34 mm thanks to its compact stator design.

I-Mold goes on to explain, the 45-mm-wide SDK-045 is intended for higher coolant flow rates and accommodates cooling pipes measuring from 6 – 10 mm in diameter. The default cooling pipe length is 300 mm with customised lengths being available on demand. The core attachment thread may be either metric fine or inch-type.

For connecting the coolant hoses, I-Mold’s new rotary cooling units come with standard plug-in couplings. Quick-acting couplings are also available as an option. The minimum bending radius of the coolant hoses depends on the material required for the given temperature range. It is equal to 35 mm for coolant temperatures up to 60 °C, 50 mm for temperatures up to 80 °C, and 90 mm for hoses rated up to 120 °C. The maximum operating pressure is 10 bar. A suitable coolant is filtered water, with a filter fineness of 0.05 mm or below, the company explains.