Hangzhou Epsole Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of auto batch eps foam pre-expander in China. We warmly welcome you to buy high quality auto batch eps foam pre-expander for sale here from our factory. Good service and reasonable price are available.
EPS Automatic Batch Pre-expander Machine – Precision Foam Bead Production for Insulation & Packaging
The EPS automatic batch pre-expander is the first and most critical machine in any EPS production line. It transforms expandable polystyrene (EPS) beads into uniformly expanded foam beads at precise target densities through a fully enclosed steam expansion process. Unlike continuous pre-expanders that operate with constant material flow, batch pre-expanders process discrete batches using an electronic weighing system that precisely controls the amount of raw material for each cycle.
At Epsole, our automatic batch pre-expander is engineered with precision electronic weighing & photoelectric level control system achieving density deviation of ＜1% per batch (industry standard is typically 3%), a fully enclosed expansion chamber delivering over 50% energy savings compared to continuous pre-expanders, PLC intelligent cycle control with Siemens/Schneider/SMC components, and a designed lifespan of over 10 years. The machine supports secondary expansion down to 4.5 kg/m³.
| Parameter | Specification | Customer Value |
|---|---|---|
| Primary Density Range | 7–35 g/L (7–35 kg/m³) | Covers packaging and insulation applications |
| Secondary Density Range | 4.5–11 g/L (4.5–11 kg/m³) | Ultra-low density for Geofoam & lightweight fill |
| Density Tolerance | ＜1% per batch (industry standard: 3%) | Raw material savings of 2-5% |
| Energy Saving | 50%+ vs. continuous pre-expanders | Tens of thousands of dollars annual savings |
| Weighing Accuracy | ±0.05 kg controlled deviation | Precise per-batch weighing; consistent density |
| Control System | PLC + Touch Screen HMI | Fully automatic; recipe storage; one-touch changeover |
| Key Components | Siemens, Schneider, SMC | Reliable operation; globally available spare parts |
| Chamber Material | Thickened stainless steel | Corrosion-resistant; contamination-free |
| Service Life | 10+ years | Long-term investment protection |
| Automation | Automatic feeding, weighing, temperature/pressure control | Reduces 1-2 operators per shift |
| Testing | 72-hour continuous trial run before delivery | Proven reliability before shipment |
| Certifications | CE + ISO 9001 | Hassle-free customs clearance; global compliance |
Core Advantages
Precision Density Control
The weighing system uses a special weighing controller and load cell with a controlled deviation of ±0.05 kg.
Fully Enclosed Chamber
The foamed beads are uniform, and aging time is shorter compared to other normal machines.
Secondary Expansion
Our batch pre-expander supports secondary expansion, extending the density range down to 4.5–11 g/L.
PLC Intelligent Control
The machine adopts PLC programmable controller and touch screen control for fully automatic operation.
Industrial-Grade Durability
Thickened stainless steel and wear-resistant materials, with a designed lifespan of over 10 years.
why choose us
Quality Assurance
ISO 9001:2015 certified CE certified – compliant with EU Machinery Directive
Fast Logistics
Factory located in Hangzhou, just 2 hours from Shanghai Port
After-Sales Support
On-site installation & commissioning Operation & maintenance training
Flexible Payment
TT, L/C at sight. Trade terms: EXW, FOB Shanghai, CIF.
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