The document provides an overview of extruders, which are devices that transport molten materials into molds using screws to generate melt energy. It details the components and operation of a single screw extruder, as well as parameters like capacity and efficiency, and highlights the historical evolution and benefits of the technology in producing high-quality food products. Key advantages of using extruders include improved uniformity in flavoring and non-contamination of ingredients.

1. MINI PROJECT
ON
EXTRUDER
`

2. INTRODUCTION
 An extruder is a device that is specially designed to deliver
a raw material in molten form to a mold by means of labor
and die . An extruder is fed with solid-plastic (often granulate)
and releases molten plastic and slurry under pressure.

3. SCREW
 The screw drive supplies 80% of the melt energy.
 screw extruder:usually with a depth of around 0.5
mm, to obtain screw hardness of around 800 HV
and barrel hardness of approximately 1000 HV.
 Made of :Nitriding steels, Powder metallurgy steels,
or Bi-metals .The standard helix angle for most
extrusion screws is 17.6568º

4. HISTORY
1948, to blend molasses with
dry feedstuffs and compress
it into pellets.
1958, production of
expanded pet food.

5. TO UNDER STAND EXTRUDER
Extrusion
 Fixed cross-sectional
profile.
 A material is pushed
through a die
 very complex cross-
section, brittle,
because the material
only encounters
compressive and shear
stresses. Excellent
surface finish.
overview

6. TYPES OF EXTRUSION
 Based on ram position
 Based on crystalization
temperature
 Cold extrusion
 Hot extrusion

7. DIE DESIGN
 Replica of final product
circumference.
 Shapes

8. EXTRUDER
 Feed zone
 Melting
 mixing

9. FEEDING ZONE
 Screw
 Raw material
 motor

10. MELTING AND MIXING
 Addition of water
 Mixing
 Boiling to high
temperature
 Temperature
 Viscocity

11. SINGLE SCREW EXTRUDER
Fig: Single Screw Extruder

12. SINGLE SCREW EXTRUDER
PARTS & ITS FUNCTIONS

13. WENGER X20 SINGLE SCREW EXTRUDER
Fig: Wenger X20 Single Screw Extruder

14. PROCESS
1.In takes Raw material from the feeder,where there
is no need of driver to direct the material,we use
gravity in driving the materials.

15. .
2.The feeded material after undergoing volumetric
compression passes through single screw(clock
wise direction) for further compression of material
to get uniform composition

16. .
3.The mixed material after undergoing compression
along with addition of material is broken into
required dimension are sent for cooling down to
room temperature

17. .
4. Cooling of finished products take place at cooling
chamber containing moving layers

18. PARAMETERS
 Capacity:8-12t/h.
 Power:315kw.
 High efficiency.
 Efficiency:65%
 viscocity:1000Pa-s
 Flow rate:50g/m
 Internalpressure:0-60pa
 T mean=280f

19. RAW MATERIAL:

20. CONCLUSION
 High quality durable products.
 The man power reduction in making of food
products and evolution of extruder resulted in
 High efficiency.
 uniform flavoring.
 non-contaminating.
 uniform ingredient.
 We can achieve dust less and Improved product

21. THANK YOU