Batch pre-expanders are renowned for their flexible use in low and high densities. Here,the raw material is weighed in batches and expanded in the pre-expander.

The plants work fully automatic from material feeding to discharge of the complete plant.

A fast adjustment to different raw materials and densities from one cycle to the next is guaranteed.

All advantages at a glance:

• suitable for low pentane materials and copolymers
• high throughputs at low energy consumption
• even density distribution ±0,2 g/l at 20 g/l
• fluid bed dryer with starting aid and discharge of remaining material
• sieve unit with delumper
• cellular wheel sluice with conveyor fan

Options:

• data memory on USB stick
• variable rotation speed control
• fully automatic density monitoring and control device
• electronic air addition for high densities over 30 g/l
• fully automatic silo control integrated in pre-expander control
• second pass expanding unit for densities below 13 g/l
• heating device to pre-heat the fluidising air from the fluid bed
• raw material feeding station (discharge or hydraulic tilting device)

X-Line pre-expanders are ideally suited for special materials like materials used for the production of helmets.

The fluctuations in high density ranges between 50 - 100 g/l are only ±2 g/l which is extremely low.

The X-Line pre-expanders attract attention by their modern and compact design. Great value was set on a clear and efficient installation and arrangement of the individual components. All components that require maintenance are easily accessible which reduces the servicing time considerably.

All advantages at a glance:

• suitable for low pentane materials and copolymers
• high throughputs at low energy consumption
• even density distribution ±0,2 g/l at 20 g/l
• fluid bed dryer with starting aid and discharge of remaining material
• sieve unit with delumper
• cellular wheel sluice with conveyor fan

Options:

• data memory on USB stick
• variable rotation speed control
• fully automatic density monitoring and control device
• electronic air addition for high densities over 30 g/l
• fully automatic silo control integrated in pre-expander control
• raw material feeding station (pneumatic conveying)

density (g/l)

throughput (kg/h)

X1.5

 

X3

 

 13

 

 85

140

 20

 

 140

 330

 25

 

 180

 360

Kurtz developed a special system for the pre-expansion of EPS and EPP with a maximum working pressure of 2.5 bar. These kind of pre-expander can reduce the density by a volume of maximal 2.5 (so-called second stage expansion).

Especially for EPE material an exact temperature control is required to achieve a density as even as possible.

Usable volume of pre-expander tank:

400 l

800 l

Throughput depending on starting density up to:

500 kg/h

1000 kg/h