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EPS Continuous Preexpander is a kind of EPS Machine working with mechanical control. EPS raw material is first filled from screw conveyor to expansion loader. At the bottom of loader is the screw, to move material from loader to expansion chamber. During steaming, agitating shaft is moving constantly to make the material density even and uniform. Raw material move to chamber continuously, and after steaming, material level continuously move up, till the material level comes to same level of discharging opening port, then material will automatically flow out. The higher the discharge opening is, the longer the material stays in the barrel, so the lower the density is; the lower the discharge opening is, the shorter the material stays in the barrel, so the higher the density is. The control of the continuous pre-expanding machine is very simple. Whether the steam pressure is stable or not has a great influence on the density of expanding. Therefore, our continuous pre-expanding machine is equipped with a Japanese pressure reducing valve. In order to make the steam pressure in the machine more stable, we use the screw to feed the material at a uniform speed, and the uniform steam and uniform feed are as uniform as possible.
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Continuous Preexpander |
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Item |
SPY90 |
SPY120 |
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Expansion chamber |
Diameter |
Φ900mm |
Φ1200mm |
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Volume |
1.2m³ |
2.2m³ |
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Usable volume |
0.8m³ |
1.5m³ |
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Steam |
Entry |
DN25 |
DN40 |
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Consumption |
100-150kg/h |
150-200kg/h |
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Pressure |
0.6-0.8Mpa |
0.6-0.8Mpa |
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Compressed Air |
Entry |
DN20 |
DN20 |
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Pressure |
0.6-0.8Mpa |
0.6-0.8Mpa |
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Drainage |
Entry |
DN20 |
DN20 |
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Throughput |
15g/1 |
250kg/h |
250kg/h |
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20g/1 |
300kg/h |
300kg/h |
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25g/1 |
350kg/h |
410kg/h |
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30g/1 |
400kg/h |
500kg/h |
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Material conveying line |
DN100 |
Φ150mm |
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Power |
10kw |
14.83kw |
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Density |
First expansion |
12-30g/l |
14-30g/l |
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Second expansion |
7-12g/l |
8-13g/l |
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Overall dimension |
L*W*H |
4700*2900*3200(mm) |
4905*4655*3250(mm) |
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Weight |
1600kg |
1800kg |
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Room height required |
3000mm |
3000mm |
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Machine features
1. The machine adopts Mitsubishi PLC and Winview touch screen for automatic mould opening, mould closing, material filling, steaming, temperature keeping, air cooling, demoulding and ejecting.
2. Machine’s all six panels are through heat treatment to release welding stress, so that panels cannot deform under high temperature;
3. Mould cavity is made of special aluminum alloy plate with high-efficiency heat conduction, aluminum plate thickness 5mm, with Teflon coating for easy demoulding.
4. The machine set up high-pressure blower for suction material. Cooling is done by convection air by blower.
5. Machine plates are from high-quality steel profile, through heat treatment, strong and no deformation.
6. Ejection is controlled by hydraulic pump, so all ejectors push and return at same speed;
http://www.ds-epsmachinery.com/
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