Hangzhou Epsole Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of eps batch foaming pre-expander in China. We warmly welcome you to buy high quality eps batch foaming pre-expander for sale here from our factory. Good service and reasonable price are available.
EPS Automatic Batch Pre-expander Machine
EPS Automatic Batch Pre-Expander Machine is the critical first stage in the Expandable Polystyrene (EPS) production line. It transforms dense, raw EPS resin beads containing a blowing agent (typically pentane) into large, lightweight, expanded foam beads.
Unlike continuous pre-expanders, a batch system processes a highly accurate, measured weight of raw material in isolated cycles. This precise control makes it the industry standard for high-quality block molding and shape molding, where uniform density is paramount.
| Technical Parameters | Automatic Intermittent EPS Pre-expander | Industry Reference Level | Value |
|---|---|---|---|
| Primary Foaming Density Range | 8–40 kg/m³ | 8–30 kg/m³ | Covers standard applications such as building insulation, packaging, and automotive interiors. |
| Secondary Foaming Density Range | 4.5–11 kg/m³ | Typically lacks secondary foaming capability. | Ultra-low-density, ultra-light filler-dual-purpose functionality in a single machine. |
| Density Tolerance Control | ≤ ±2.5%; the vibration-sensing controller can achieve ±0.3 kg/m³. | ±3–5% | The downstream molding reject rate has been reduced by over 50%. |
| Steam Consumption (In-tank Temperature Control Accuracy) | Temperature Difference: ±1% (Japanese-imported high-precision pilot-operated pressure reducing valve + proportional control valve) | ±2–3% | Fully enclosed, constant-pressure foaming ensures high thermal efficiency and uniform, consistent bead expansion. |
| Comprehensive Energy Conservation | Features a fully sealed drum design, saving over 50% more energy compared to continuous-type systems. | - | Long-term operating costs are significantly reduced. |
| Foaming time per batch | 60–80 seconds per cycle | 90–120s | High production efficiency: a single unit is sufficient to meet an annual production capacity requirement of less than 2,000 tons. |
| Barrel Material | Dual-Layer Interior and Exterior 304 Stainless Steel + High-Efficiency Thermal Insulation Layer | Ordinary Carbon Steel or Single-Layer Stainless Steel | Corrosion-resistant and non-contaminating, with a low outer wall temperature and minimal heat loss. |
| Control System | Omron/Mitsubishi PLC + 10-inch HMI Touchscreen | Domestic-brand or unbranded PLCs | Fully automatic cyclic control, with one-touch recall of stored recipes. |
| Fluidized Drying Bed | Standard features include automatic drying, screening, crushing, and pneumatic conveying to the curing silo. | Natural ventilation only | One-stop post-processing, significantly reducing manual intervention. |
| Configuration Capabilities | Yoshitake (Japan) Steam Pressure Reducing Valves, Proportional Valves, and Vibration Sensors | - | Core components from renowned brands ensure long-term reliability. |
| Compliance Certification | ISO 9001:2015 + CE Certification | Depends on the supplier | Seamless Global Customs Clearance |
Core Product Advantages
Precision Weighing Closed-Loop System
Utilizes a unique electronic weighing system combined with a vibration-based foaming level sensor to achieve a dual closed-loop density control mechanism.
Fully Enclosed, Constant-Pressure Foaming Vessel
Features a fully enclosed, constant-pressure foaming vessel design, comprising a double-layered stainless steel shell (inner and outer) with a highly efficient thermal insulation interlayer.
Secondary Foaming Capability
Equipped with dual functionality for both primary and secondary foaming, meeting the production requirements for products of varying densities.
Fluidized Drying Bed
Available as a standard or optional feature, the large-capacity fluidized drying bed enables comprehensive, one-stop post-processing.
PLC + HMI Fully Automated Control System
The equipment is centrally controlled via a PLC (Programmable Logic Controller) and a touch-screen Human-Machine Interface (HMI).
304 Stainless Steel Construction
Both the inner and outer walls of the fully enclosed foaming vessel are constructed from high-grade 304 stainless steel.
why choose us
Our products have been exported to over 30 countries and regions, with a cumulative delivery of more than 100 complete EPS production lines.
The entire production line features standardized equipment interfaces and synchronized process data, significantly reducing the coordination costs associated with managing multiple suppliers.
We provide on-site installation, commissioning, and operational training services overseas; our equipment complies with ISO 9001:2015 standards and EU CE directives.
We provide complete export customs clearance documentation, offer flexible trade terms, and accept payment via TT or Sight L/C.
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