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JZL-120 Double Screw Extruder JZL-120 Double Screw Extruder

Extrusion is a technique used to process wet powder mass into homogeneous strands of material prior to spheronization. Widely used within the pharmaceutical industry, the process has many advantages, including the elimination of dust hazards.

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  • Product Description
  • Technical Data
  • Working Principle
  • Main Components


DOUBLE SCREW EXTRUDER


The popularity of twin screw extruders is attributed to its versatility and applicability to a remarkably wide range of materials. Besides this, extruders allow continuous processing and are capable of delivering high value, high quality products in large quantities. The growing number of industrial applications of extrusion technology in the last few decades has led to an increasing interest in understanding the extrusion process. However, the complexity of the extrusion process such as the shear, mixing, flow performance and the material interaction make the study very challenging and empirical approaches have made little contribution to the fundamental understanding of the process.

 

JUNZHUO MACHINERY single/double screw extruder is suitable for most low pressure wet extrusion processes used in solid dosage processing. Extrusion performed by two detachable, contra rotating gears. This action generates minimum heat and does not work the product excessively. This makes it ideally suited for extruding pharmaceutical products. Feeding can be done manually or automatically by auger feed.


Screw driven extruders (with radial or axial output)


Axial Press extruder has either single or twin screws, depending on the output required, which transfers the materials to the flat die. The thickness of the die can be provided as different thickness to deliver a range of compressive energies. The axial die perforation size range available from 0.8 to 5 mm with varying thickness up to 5 mm.


It is possible to add cooling systems to screw driven extruders but these vary in efficiency at keeping the product cool during the process even though they may keep the equipment cool!  It is recommended if you have restrictions on the amount of heat allowed, that any screw driven extruder is carefully considered. It is also advisable to measure the product temperature of the extrudate produced. This is particularly true if you need to extrude product through very small holes.


Radial extruder is used for the conversion of dough material and wetted powders in uniform size granules by adding binders. These extruders are immensely used in ceramics, herbals, polymers, catalysts, food, sugar industries and pharmaceutical industries. The extruder typically consists of two semi-cylindrical screens along each side of two counter rotating extruder heads. Each head consists of a truncated cone with three attached blades. A twin screw feeds paste into the space between the extruder heads and the screens. The relative motion between the screen and the blade causes the paste to be extruded through the screen in the vicinity of the blade. Compared to other technologies, radial screen extruders produce granules with medium density and hardness.


Double Screw Extruder


Salient Features :

  • Designed as per cGMP – Current Good Manufacturing  Practices

  • Contact parts in AISI 316, AISI 304 or MS as desired  by customer.

  • Different models in extruders such as Single Screw  extruder, Double Screw Extruder,Axial extruder, Radial extruder.

  • Length of extrusions is adjustable.

  • Up to 90% uniformity (substantially formulation dependent).

  • Change of extrusion diameter/ Pellet size by  changing screen sieve.

  • Continuous cooling arrangement during extrusion  operation for pressing roller.


ModelJZL-50JZL-80JZL-100JZL-120JZL-140JZL-180JZL-200(customized design)JZL-200
Capacity10-80kg/h

30-180

kg/h

30-300

kg/h

30-450

kg/h

150-500

 kg/h

500-1200

kg/h

200-2500

kg/h

200-2500

kg/h

Screen Sieveφ1-8mmφ1-8mmφ1-8mmφ1-8mmφ2-8mmφ2-20mmφ2-20mmφ2-20mm
Screw Diameterφ50*2φ78*2
φ100*2φ120*2φ138*2φ180*2φ200*2φ200*2
Motor Power2.2kw4kw5.5kw7.5kw11-15kw22-30kw30kw40kw
Rotation Speed80r/min    80r/min  80r/min  70r/min  60r/min  60r/min 60r/min 60r/min
Overall Size820*440*720mm1200*600*1000mm1400*650*1200mm1500*650*1250mm2000*750*1150mm2440*1450*1200mm2450*1650*1200mm2680*1650*1200mm
Approx. Weight170kg450kg650kg780kg1100kg2000kg1750kg3000kg



Double Screw Extruder Working Principle

Twin screw extruders consist of two intermeshing, co-rotating screws mounted on splined shafts in a closed barrel. Due to a wide range of screw and barrel designs, various screw profiles and process functions can be set up according to process requirements. The major advantage of intermeshing co-rotating twin screw extruders is their remarkable mixing capability which confers exceptional characteristics to extruded products and adds significant value to processing units.

In twin screw extrusion processing, the raw materials may be solids (powders, granulates, flours). Extruded products are chemically modified polymers, textured food and feed products, cellulose pulps, etc.


Double Screw Extruder


  1. Screen Sieve, which is made by SS304 or SS316L, granule size from 0.8mm to 5mm

    Double Screw Extruder Screen Sieves



    Double Screw Extruder Screen Sieves


  2. Single/Double Screw, twin screw extruder offers higher process productivity as compared to single screw extruder.

  3. Single Screw

    Single Screw


    Double Screw

    Double Screw

  4. Radial /Axial output, the granules of radial extruder is side discharged, and anxial extruder is front discharged.

    Axial Extruder

    Axial extruder


    Radial Extruder

    Radial extruder

  5. Cutting Knife, which can adjust the granule length.Only axial extruder can be equipped with it.

    Cutting Knife

    Cutting knife


    Cutting Knife

    Cutting knife

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