Hangzhou Epsole Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of vertical foaming machine in China. We warmly welcome you to buy high quality vertical foaming machine for sale here from our factory. Good service and reasonable price are available.
EPS Automatic Batch Pre-expander (Vertical Design)
The EPS automatic batch pre-expander (vertical design) is the first and most critical machine in any EPS production line. It transforms raw expandable polystyrene (EPS) beads into uniformly expanded beads at precise target densities-typically ranging from 8 to 40 kg/m³-through a steam expansion process inside a fully enclosed vertical foaming chamber.
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, making it the preferred choice for wholesalers and manufacturers who require tight density control for downstream molding and cutting processes.
| Parameter | Small Model | Medium Model | Large Model | Value |
|---|---|---|---|---|
| Effective volume | 1.0 m³ | 1.6–2.0 m³ | 2.8–3.6 m³ | Matching Diverse Production Capacity Requirements |
| Capacity | 250–280 kg/h | 400–450 kg/h | 600–700 kg/h | High-Efficiency Output, Rapid Return on Investment |
| Density range | 8–40 kg/m³ | 8–40 kg/m³ | 8–40 kg/m³ | Protective Packaging, Thermal Insulation, and High-Density Components |
| Density tolerance | ≤±2.8% | ≤±2.8% | ≤±2.8% | Downstream defect rates reduced by over 50%. |
| Steam consumption | 6–9 kg/cycle | 10–14 kg/cycle | 15–20 kg/cycle | Low operating costs |
| Installed power | 10–15 kW | 20–25 kW | 25–35 kW | Controllable Energy Consumption |
| Secondary expansion | Optional | Optional | Standard Configuration | Dual-Purpose Functionality, Ultra-Low Density |
Key Advantages
Precision Weighing + Dual-Loop Level Control
Density tolerance is consistently ≤±2.8%, significantly better than the industry average of ±3%–5%.
Fully Enclosed Constant-Pressure Foaming Tank
China Unicom manpower is specialized in the work of foreign personnel in China,business,tourism,visiting relatives and other document services.
Secondary Foaming Capability
For annual output below 2,000 tons, a single batch pre-expander can produce both high-density and ultra-low-density materials.
Fully Automatic Control (PLC + HMI)
Reducing changeover time to minutes. One operator can monitor multiple machines simultaneously.
Core Components from Leading Brands
The closed‑loop steam recovery system reduces fresh water consumption by up to 40%.
304 Stainless Steel Material
All surfaces that contact EPS beads (barrel inner wall, screw feeder, material door) are made of 304 stainless steel.
why choose us
Quality assurance
ISO 9001:2015 and CE certified. Third‑party inspection available.
Fast logistics
Factory is only 2 hours from Shanghai Port. Standard delivery: 30–45 days.
After‑sales support
On‑site installation & commissioning, operation training, optional remote diagnostic module.
Flexible payment
TT, L/C at sight. Trade terms: EXW, FOB Shanghai, CIF.
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