The hetech preex product family represents advanced pre-expansion solutions for the efficient processing of particle foams such as EPS (Expanded Polystyrene) and EPP (Expanded Polypropylene).
Pre-expansion is one of the most important process steps in particle foam production. It determines the final material quality, density consistency, mechanical performance, and overall process efficiency of the downstream molding process.
With the hetech preex range, customers can choose from different system concepts depending on material requirements, production volume, and process goals – from highly flexible small-batch solutions to high-capacity industrial production systems.
During pre-expansion:
Different pre-expansion technologies are used depending on the material type, target density, and production requirements.
For example:
The quality of this step directly influences:
The hetech preex systems are used across a wide range of industries where lightweight, insulating, or protective foam components are required.
Typical applications include:
Depending on the product and material, customers can choose the ideal pre-expansion concept for their production goals.
Compared to other pre-expansion systems, the hetech preex range offers significant advantages:
Vacuum systems and the RMC reduce stabilization times and required storage capacity.
Accurate density control improves product quality and reduces material variations between batches.
Precise control of pressure, temperature, airflow, and stabilization ensures consistent material quality and repeatable production results.
The combination of pre-expansion, conditioning, and material handling creates a fully optimized upstream process for shape molding and block molding applications.
From small batch production to high-capacity industrial systems, the portfolio covers a wide range of production requirements.
Optimized process control helps reduce steam consumption, improve throughput, and lower overall operating costs.
With decades of experience in particle foam processing, hetech combines machine technology, process expertise, and practical application knowledge into one integrated solution.
The result is not just a pre-expander – but a complete process approach focused on:
The content you know from HIRSCH Technology and Erlenbach Maschinen is now available here on hetech-group.com.
We’re happy to have you with us.
