Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN

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To constantly improve the management system by virtue of the rule of "sincerely, good faith and quality are the base of enterprise development", we widely absorb the essence of related products internationally, and constantly develop new products to meet the demands of customers for Eps Aluminum Mould, Eps Preexpander, Styrofoam Block Molding Machine, Our mission is to allow you to create long-lasting relationships together with your consumers via the ability of marketing merchandise.
Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN Detail:

Machine Introduction

Inside EPS raw beads, there’s the blowing gas called pentane. After steaming, pentane starts to expand so the bead size also grows bigger, this is called expanding. EPS raw beads cannot be used to make blocks or packaging products directly, all beads need to be expanded first then make other products. Product density is decided during Preexpanding, so density control is done in Preexpander.

EPS Continuous Preexpander is functioned to expand EPS raw material to required density, machine works in continuous way both in taking raw material and discharging expanded material. EPS Continuous Pre-expander can do second and third expansion to get low density.
EPS Continuous Preexpander complete with Screw Conveyor, First and second expansion loader, Expansion Chamber, Fluidized bed Drier

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.

Technical Parameter

Continuous Preexpander
Item   SPY90 SPY120
Expansion chamber Diameter Φ900mm Φ1200mm
Volume 1.2m³ 2.2m³
 Usable volume 0.8m³ 1.5m³
Steam Entry DN25 DN40
Consumption 100-150kg/h 150-200kg/h
Pressure 0.6-0.8Mpa 0.6-0.8Mpa
Compressed Air Entry DN20 DN20
Pressure 0.6-0.8Mpa 0.6-0.8Mpa
Drainage Entry DN20 DN20
Throughput 15g/1 250kg/h 250kg/h
20g/1 300kg/h 300kg/h
25g/1 350kg/h 410kg/h
30g/1 400kg/h 500kg/h
Material conveying line DN100 Φ150mm
Power 10kw 14.83kw
Density First expansion 12-30g/l 14-30g/l
Second expansion  7-12g/l  8-13g/l
Overall dimension L*W*H 4700*2900*3200(mm) 4905*4655*3250(mm)
Weight   1600kg 1800kg
Room height required   3000mm 3000mm

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Product detail pictures:

Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN detail pictures

Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN detail pictures

Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN detail pictures

Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN detail pictures

Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN detail pictures


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Just about every member from our large efficiency income crew values customers' wants and enterprise communication for Big Discount Polystyrene Tool - SPY90-SPY120 Continuous Pre expander – DONGSHEN , The product will supply to all over the world, such as: Suriname, Istanbul, Cancun, All of our products comply with international quality standards and are greatly appreciated in a variety of markets around the world. If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients in the near future.
  • Perfect services, quality products and competitive prices, we have work many times, every time is delighted, wish continue to maintain!
    5 Stars By Alice from Costa Rica - 2017.01.28 18:53
    The company keeps to the operation concept "scientific management, high quality and efficiency primacy, customer supreme", we have always maintained business cooperation. Work with you,we feel easy!
    5 Stars By Gabrielle from Philippines - 2017.02.18 15:54
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