EPS Foam Cups Steam Chest Molding System

Sunwell Global’s Steam Chest EPS Foam Cup Molding System is a fully integrated solution for manufacturing insulated EPS foam cups and food containers. Designed for high-volume production, the system delivers uniform density, clean edges, and excellent thermal insulation, making it ideal for foodservice cup manufacturers seeking stable output and energy-efficient operation.

Advanced Steam Chest Molding Technology
High-pressure steam chambers and precision-controlled mold filling ensure uniform foam density, smooth surfaces, and accurate cup geometry. The system supports both standard and deep-draw EPS cup designs.

Integrated Pre-Expansion and Bead Handling System
The turnkey line includes a continuous EPS pre-expander with throughput up to 250 kg/hr, supplying stabilized, sieved, and air-dried EPS beads. One pre-expander can efficiently serve multiple molding machines for optimized line productivity.

Fast Cycle Time with Energy-Efficient Operation
Optimized steam, vacuum, and cooling control significantly shorten molding cycles. Machine and tooling designs are engineered to reduce steam consumption and overall energy usage while maintaining high output.

High-Output Multi-Cavity Molding Design
A 10-cavity mold carrier operates in a horizontal configuration using a pneumatic–mechanical toggle clamping system, providing strong closing force and stable high-speed production—ideal for mass-produced EPS foam cups.

Automated De-Molding and Product Ejection
An integrated ejector system ensures smooth product release, minimizes manual handling, and supports consistent high-volume operation with reduced labor requirements.

Precise PLC-Based Pressure and Temperature Control
A PLC touch-screen interface accurately controls steam, vacuum, and cooling parameters, improving cycle repeatability, reducing scrap rates, and ensuring stable quality—even for thin-wall EPS cups.

Optional Quality Inspection, Counting, and Bagging Systems
Optional continuous leak detection ensures product integrity. An automatic counting and bagging system can collect output from up to four molding machines, packing 1–3 stacks per bag at speeds of up to 25 stacks per minute.