EPS Batch Pre-expander Machine

The Batch EPS Pre-Expander Machine is a workhorse of the EPS (Expanded Polystyrene) industry, responsible for pre-expanding raw EPS beads before they are molded into various packaging and building products. Here’s a breakdown of its key features:

Function of EPS Batch Pre-expander Machine:

• Pre-expands virgin EPS beads through a controlled process of heating and pressurization followed by rapid depressurization.
• This process increases the bead volume by several times, making them ideal for molding into lightweight and strong EPS products.

Components of EPS Batch Pre-expander Machine:

Pressure Vessel: This robust chamber, typically made of stainless steel, houses the EPS beads during the pre-expansion process. Sizes can vary depending on the machine’s capacity, ranging from 50 liters to 200 liters or more.

Feeding System of EPS Batch Pre-expander Machine:

• Manual: Involves manually adding a pre-weighed batch of beads to the vessel.
• Automatic: Utilizes a hopper, feeder screw, and weighing system for precise and automated bead loading.

Heating System:

• Steam Jacket: The vessel is surrounded by a jacket through which steam is circulated, heating the beads uniformly.
• Electrical Heaters (less common): Internal or external heating elements directly transfer heat to the beads.

Pressurization System:

Compressed Air: Compressed air is injected into the vessel to raise the pressure and further promote bead expansion.

Depressurization System: A rapid release valve allows for quick depressurization, triggering the expansion of the beads.

Control System:

• PLC (Programmable Logic Controller): The brain of the machine, it controls all aspects of the process, including temperature, pressure, cycle time, and safety features.
• Touchscreen Interface: Provides an intuitive interface for setting parameters, monitoring the process, and troubleshooting.

Discharge System:

• Manual: Expanded beads are manually unloaded from the vessel after a cycle.
• Automatic: A valve or screw conveyor allows for automated discharge of expanded beads into a storage silo.

Benefits of EPS Batch Pre-expander Machine:

• Consistent Bead Expansion: Precise control over temperature, pressure, and cycle times ensures uniform bead expansion.
• Improved Product Quality: Expanded beads with consistent density lead to high-quality final products with desired strength and insulation properties.
• Reduced Material Usage: Pre-expansion increases the volume of the beads, allowing for less material usage per molded product.
• Energy Efficiency: Modern batch pre-expanders are well-insulated and utilize efficient heating methods to minimize energy consumption.
• Scalability: Available in various sizes to meet different production capacities.

Additional Considerations:

• Safety Features: Look for features like pressure relief valves, emergency shut-offs, and proper ventilation to ensure operator safety.
• Ease of Operation: Choose a machine with a user-friendly interface for smooth operation and minimal training requirements.
• Maintenance Needs: Regular cleaning and maintenance are crucial for optimal performance and longevity.
• Brand Reputation: Opt for a reputable manufacturer known for quality construction and reliable after-sales service.

Applications of EPS Batch Pre-expander Machine:

• Pre-expanding EPS beads for packaging applications like protective cushioning and food containers.
• Preparing EPS beads for construction uses like building insulation boards and architectural moldings.
• Supplying pre-expanded beads for lost-foam casting applications.

By understanding the components, benefits, and considerations of a Batch EPS Pre-Expander Machine, you can make an informed decision when choosing the right equipment for your EPS production needs.

Item		Type
		ESPB-50		ESPB-110		ESPB-150		ESPB-160
Expansion Container	Diameter Volume Useable Volume	500mm 0.14m 0.1  m³		1100mm 1.4m³ 0.9m³		1500mm 4.5m³ 3.2m³		1600mm 5.4m 4.5m³
Steam	Entry Consumption Pressure	DN25 0.5-0.7kg/cycle 0.6-0.8MPa		DN50 8-11kg/cycle 0.6-0.8MPa		DN 50 15-18kg/cycle 0.6-0.8MPa		DN100 18-20kg/cycle 0.6-0.8MPa
Compressed Air	Entry Consumption Pressure	DN20 0.2-0.3m³/cycle 0.6-0.8MPa		DN25 0.5-0.6m³/cycLe 0.6-0.8MPa		DN40 0.5-0.6  m³/cycle 0.6-0.8MPa		DN40 0.5-0.8m³/cycle 0.6-0.8MPa
Drainage	Drainage Port Condensate	DN80 DN20		DN80 DN80		DN100 DN40		DN150 DN50
Productive Capacity		12g/l 18 g/l 25 g/l 32g/l 50g/l	80kg/h 120kg/h 125kg/h 220kg/h 280kg/h	12g/1 15g/ 20g/I 30g/1	240kg/h 320kg/h 430kg/h 600kg/h	12g/l 15g/1 20g/I 30g/l	600kg/h 900kg/h 1200kg/h 1500kg/h	12g/l 15g/l 18g/l 25g/1	1400kg/h 1800kg/h 2300kg/h 2800kg/h
								Second expansion
								8g/1 10 g/1	800kg/h 1000kg/h
Material Conveying Line	150mm                       150mm                       250mm                       250mm
Power		9.5KW		16.1 KW		24.85KW		3.5KW
Density	12-140g/1                    12-30g/l                    12-30g/1                     12-30g/1
Density Toleranoe		≤±2%		≤±2%		≤5%		≤±5%
Overall Dimension	(LxWxH)               3000×3800×3800(mm)         5600×300×4530(mm)         6500×4150×5400(mm)         8600×3500×5800(mm)
Weight		1500kg		3500kg		5000kg		8000kg
Room Height Required	5000mm                      5000mm                      6000mm                       7000mm
Note:Machines are highly customized according to customer’s requirement.