Press Release Page1:“MHT at K 2007”:
A more intelligent approach to PET molds – The new HP-Stack

Press Release

MHT at K 2007

A more intelligent approach to PET molds –
The new HP-Stack

Düsseldorf, 24th October 2007. – As MHT enters into final preparations for the K 2007 exhibition the management is pleased to be able to report that the outstanding order book for PET molds and hot runners is the highest in the company's history - thanks in no small part to the extended sales and service network and extended marketing coverage. To cope with this tremendous inflow of orders MHT is currently increasing capacity, and staffing, in all departments and extending the production area.

A more intelligent approach to PET molds

By adopting a more intelligent approach to PET mold design MHT have made significant advances in terms of preform quality and cycle time reduction. The MHT standard stack*) has been continuously improved to reach outstanding levels of performance. In parallel the new High Performance (HP) stack is now undergoing long-term production trials.The intelligent approach adopted by MHT includes the ability to "mix and match" components from the two stack options in order to resolve customer-specific perform problems, e.g. the use of the HP stack neck-ring inserts on a standard stack to improve cooling and speed up cycle times. The intelligent modular concept enables components such as gate inserts, cavities and cores to be built into a standard stack to achieve optimum preform quality at a realistic price.

The new HP-Stack

The new High Performance Stack (HP-Stack®) was developed for superior mold cooling performance. It contains sophisticated cooling system to provide uniform temperature distribution around the molding surface. HP-Stack maintains this low temperature even with very aggressive cycle times. Its temperature is not affected by accumulated heat from cycle to cycle.

The new neck ring and cavity designs bring effective cooling to areas not previously accessible. This prevents thread sinks, flat support ledge defects and parting line deformations. Preforms are dimensionally more stable, ready for earlier demolding and hence more effective post-mold cooling. The new gate design eliminates counterproductive heat transfer away from the nozzle section and focuses only on cooling the gate area of the preform. This allows significant water flow reduction to the gate insert circuitry and contributes to the total energy savings of the new MHT molds. These new HP-stack advances, combined with COOL-MAX® post mold cooling technology, resulted in a cycle time reduction leading in some applications up to a 30% productivity increase.

Hot runners

MHT have also applied their "intelligent design" philosophy to hot runners. The MHT state-of-the-art hot runner not only has excellent start-up performance and delivers identical part weight across all cavities thanks to homogeneous melt distribution, but, being much slimmer than most, has a low mass and a correspondingly low energy consumption. It is designed to be easily adaptable to any one of over 70 mold shoes to fit preform systems from all of the leading manufacturers.

Low neck

A hot topic right now is the subject of low, lightweight neck finishes, such as the PCO 1881. MHT have selected a number of what will probably be the most popular finishes. These "Off-the-shelf" test preforms are offered and available ahead of K 2007 to support customer trials.

*)The term stack is used to describe a preform cavity built up of various different components such as the thread finish, neck ring, core, gate insert etc.This note is to avoid any confusion with a conventional "stack mold".

  • MHT at K 2007: Hall 1, Stand B06

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Further Information:

Ralph Gauss, Marketing, MHT Mold & Hotrunner Technology AG
Dr. Ruben-Rausing-Str. 7, D - 65239 Hochheim (Main)
Tel.: +49 (0) 61 46/9 06-0, Fax: +49 (0) 61 46/9 06-3 97
E-Mail: , Internet:

With a four-cavity mold MHT demonstrates at its K booth the new HP-Stack advances combined with COOL-MAX (foto) post mold cooling technology.

Photo: MHT AG

MHT, Dr. Ruben-Rausing-Str. 7, D - 65239 Hochheim, Tel.: +49 (0) 61 46/9 06-0