Hangzhou Epsole Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of batch eps foam pre-expander in China. We warmly welcome you to buy high quality 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-typically ranging from 8 to 40 kg/m³ (primary expansion)-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. This per-batch weighing capability delivers superior density consistency (≤±2.5%), making it the preferred choice for wholesalers and manufacturers who require tight density control for downstream molding and cutting processes.
| Parameter | Specification | Customer Value |
|---|---|---|
| Primary Expansion Density Range | 8–40 kg/m³ | Covers packaging, insulation, and high-density applications |
| Secondary Expansion Density Range | 4.5–11 kg/m³ | Ultra-low density for Geofoam and lightweight fill applications |
| Density Tolerance | ≤±2.5% (±0.3kg/m³ accuracy) | Superior batch-to-batch consistency; reduces downstream scrap rate |
| Energy Saving | 50%+ vs. continuous pre-expanders | Significant reduction in steam operating costs |
| Steam Consumption | 25–40 kg steam per 100kg EPS (industry average: 50–60kg) | Lower operating costs; faster ROI |
| Barrel Temperature Control | ±1%℃ (with Japanese precision reducing valve) | Ensures uniform bead expansion; consistent density |
| Barrel Material | 304 stainless steel (inner + outer) | Corrosion-resistant; contamination-free; hygienic for food-grade applications |
| Control System | PLC + 10″ HMI touchscreen | Fully automatic; recipe storage; one-touch changeover |
| Fluidized Bed Dryer | Integrated drying, screening, crushing & conveying | Automated post-processing; reduces manual labor |
| Model: ESPB 150 | Φ1500mm chamber, 4.5m³ volume, 3.2m³ usable | High-capacity production for medium-to-large scale operations |
| Certifications | CE + ISO 9001:2015 | Hassle-free customs clearance; global compliance |
Core Advantages
Precision Density Control
Our EPS batch pre-expander achieves density tolerance within ≤±2.5% through an advanced electronic weighing system and closed-loop density control.
Fully Enclosed Constant
The machine features a fully enclosed constant-pressure foaming barrel with high heating efficiency.
Secondary Expansion
Our batch pre-expander supports secondary expansion, extending the density range down to 4.5–11 kg/m³.
Fluidized Bed Dryer
The machine is automatically completes drying, screening, crushing, and conveying of expanded beads to aging silos.
PLC + HMI Automatic Control
The computer has a memory function that records EPS raw material brands, specifications, foaming processes, and all parameters.
304 Stainless Steel + Branded Core Components
The expansion chamber features a 304 stainless steel inner and outer shell with high-efficiency insulation between layers.
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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