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EPS Continous Pre-expander

Boost your production capacity with our Automatic Continuous EPS Pre-expander. Ideal for high-demand foam factory equipment setups, this machine offers uninterrupted expansion, precise density management, and energy-saving performance for large-scale Styrofoam manufacturing.

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Hangzhou Fuyang Dongshan Plastic Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of eps continous pre-expander in China, also supports customized service with low price. Welcome to wholesale high quality eps continous pre-expander for sale here from our factory. Contact us for pricelist.

Automatic EPS Continuous Pre-expander for Foam factory equipment

Core Technical Advantages

High-Throughput Continuous Operation

Designed for 24/7 production, the machine feeds raw pentane-infused beads into the expansion chamber and discharges them continuously. This eliminates the "start-stop" downtime associated with batch processing, significantly increasing daily yield.

Superior Density Uniformity

Equipped with a Frequency-Controlled Spindle and precise steam-to-air ratios, the machine ensures that every bead is expanded to a consistent density. This is vital for downstream molding quality, as uniform beads lead to better fusion and smoother product surfaces.

Advanced Thermal Management

Utilizing high-precision pressure-reducing valves (such as Yoshitake) and proportional steam control, the system maintains a highly stable temperature within the expansion chamber. This prevents "over-expansion" or bead clumping, even at low densities.

Integrated Fluidized Drying Bed

Immediately following expansion, the beads enter a Fluidized Bed with a high-power drying fan. This stabilizes the beads, removes residual moisture, and ensures they are "free-flowing" and ready for the aging silos.

Intelligent PLC Automation

The entire expansion process-including material feeding, steam injection, and bead discharge-is managed by a centralized PLC (e.g., Mitsubishi) with a touchscreen interface. Operators can make micro-adjustments to the density without halting production.

Features

Stable density control with ≤ ±3% tolerance;
Closed constant- pressure foaming, suitable for high altitude areas;

High- quality hot air drying system for uniform beads;
International brand components ensure long service life;
Easy operation with PLC & recipe memory Advantages.

Frequency spindle
The spindle rotation speed can be adjusted according to the raw material process, for ensuring that the material leve can control the expanding weight precisely.

Steam system
Adopt relief valve from YOSHITAKE,Japan, with high- precision drainage valve and filter to ensure steam pressure more stable.

Pressure control
International pressure sensor, German BATTON angle- seat valve and multi- valve exhaust system are used to ensure constant temperature and pressure expanding in the bucket, make sure the expanding process more stable and accurate.

Temperature control
The international temperature sensor and German BATTON steam and air dual proportional valve are used to control the temperature, so maintain the precise expanding temperature, for high – density expanding.

Weighing and feeding
Electronic weighing for feeding, and the feeding weight is setup on the touch screen. The weighing device will automatically weigh to achieve accurate feeding.

Material level control
Adopt the vibration sensor from Korea to control expanding material level precisely, ensuring the uniform density of raw material particles.
Material level of fluidizer bed: the height of material level can be adjusted to ensure the aging effect of expanded particles.
Flap feeding device of fluidizer bed ensure the high efficiency of expanding particle feeding .
Crushing device at bottom of fluidizer bed: to ensure convenient clean of fluidizer bed.

Mark
1. automatic weighing system of density is optional.
2. X-1400, X- 1670 second expandable function is optional.

Technical Specifications

Item		Unit	DSMAX1100B	DSMAX1400B	DSMAX1670B
Expand Chamber	Chamber	mm	φ1100×1700	φ1400×1800	φ1670×2240
	Volume	m³	1.3	2.7	4.8
	Effective Volume	m³	1	2	3.5
Steam	Inlet	inch	2"(DN50)	2"(DN50)	2.5"(DN65)
	Consumplion	kg/cycle	6-9	8-11	11~14
	Pressure	Mpa	0.5-0.8	0.5-0.8	0.5-0.8
Compressed Air	Inlet	inch	2"(DN50)	2"(DN50)	2"(DN50)
	Consumplion	m³cyce	0.5-0.8	0.6-0.9	0.7-1.1
	Pressure	Mpa	0.5-0.8	0.5-0.8	0.5-0.8
Drainage	Upper Vent	inch	4"(DN100)	5"(DN125)	6'(DN150)
Drainage	Down Vent	inch	4"(DN100)	5"(DN125)	6'(DN150)
Capacity	12g/m³	KG	400	640	960
	16g/m³	KG	500	840	1700
	20g/m³	KG	700	1000	1900
	25g/m³	KG	800	1250	2100
Total Power		KW	21.4	24.9	31.9
Expanding Pipe		mm	φ150	φ200	φ250
Expanding Tolerance(20Kg/m)		%	±2%	±2%	±2.5%
Overall Size(L×W×H)		mm	6400×3800×5200	8300×3300×5700	11000×4000×6000
Weight		KG	3500	5500	6500