When investing in a PE foam net machine for fruit, bottle, or industrial protective packaging, understanding the technical specifications is crucial for calculating ROI and production capacity. A professional PE foam net machine integrates extrusion, foaming, cooling, and winding systems. Below, we break down the core technical parameters that define the efficiency, stability, and versatility of a standard PE foam net machine production line.
1. Core Extrusion Unit Specifications
The heart of any PE foam net machine is the single-screw extruder. Key parameters include:
Screw Diameter: Common models are Φ65mm, Φ70mm, Φ75mm, and Φ90mm. The diameter determines the throughput capacity.
Screw L/D Ratio: Typically 55:1. A higher ratio ensures better plasticization of LDPE mixed with foaming agents.
Screw Material: Usually 38CrMoAlA alloy steel with nitrogen treatment for wear and corrosion resistance.
Screw Speed: 5–60 rpm, adjustable via frequency converter for precise foaming control.
Main Motor Power: Ranges from 11kW to 37kW depending on the model size.
These specs directly affect the foam structure uniformity produced by the PE foam net machine.
2. Production Capacity & Foaming Performance
Buyers evaluating a PE foam net machine must consider output and expansion capability:
Capacity: Standard output ranges from 15 kg/h to 50 kg/h (approx. 300–1,200 kg/24h).
Foaming Rate (Expansion Ratio): Adjustable from 10 to 40 times (some models up to 48×), controlling density and cushioning performance.
Product Specification: Net diameter typically 10–40 mesh or 20–150 mm in circumference, suitable for apples, pears, melons, and glassware.
Line Speed: 10–60 m/min, synchronized with the haul-off unit.
A wider foaming range allows one PE foam net machine to serve multiple packaging markets.
3. Auxiliary System Parameters
A complete PE foam net machine line includes several critical subsystems:
Foaming Agent Injection: High-pressure metering pumps for Butane (LPG) and GMS (Glycerol Monostearate) with injection pressure up to 30–38 MPa.
Die Head: Rotating circular die head (motor power 3–4 kW) made of carbon alloy steel for symmetrical mesh formation.
Cooling Method: Combined air cooling + water cooling to stabilize the foam net immediately after extrusion.
Haul-off & Cutting: 0.75 kW inverter-controlled motors with meter-counting and auto-cut functions.
Installed Power: Total power approx. 25–50 kW (3-phase, 380V/50Hz or customized).
Precise injection and cooling are vital for minimizing defects in the PE foam net machine output.
4. Dimensional & Structural Data (Reference Table)
Below is a sample specification table for two popular PE foam net machine models:
|
Parameter |
Model FPW-70 |
Model FPW-75 |
|---|---|---|
|
Screw Diameter |
Φ70 mm |
Φ75 mm |
|
L/D Ratio |
55:1 |
55:1 |
|
Capacity |
20–30 kg/h |
40–50 kg/h |
|
Foaming Rate |
20–40 |
20–40 |
|
Installed Power |
~28 kW |
~32–40 kW |
|
Overall Dimension |
11×3×1.7 m |
12×3×1.8 m |
|
Total Weight |
~2.5–3.5 T |
~3.0–4.0 T |
|
Cooling |
Air + Water |
Air + Water |
These figures help buyers allocate factory space and utility connections for the PE foam net machine.