NEWS
Twin Screw Extruder Techonlogy Instroduction
INTRODUCTION TO EXTRUSION
What is extrusion?
method of forming substances by forcing them through a perforated plate or die to produce tubes, rods, or other
desired shapes (like squeezing toothpaste out of a tube)
What types of materials can be extruded?
metals (aluminum, copper, steel, etc.)
plastics (polyethylene, polystyrene, nylon)
foods (typically high starch content)
Examples of products formed by extrusion?
[Input of student ideas first]
metals:
automobiles building construction
food or beverage cans appliances
plastics:
pipes milk cartons
packing peanuts toys
foods:
pastas breakfast cereals
multigrain snacks pretzels
jelly beans precooked rice
Saibainuo Machinery
Food Machinery--High quality.Factory price!
Email: extruder@foodmachine.cc
website: www.china-food-extruder.com
Phone(Whatsapp): +0086 18668988231
Why extrusion?
efficient, continuous production
processing of relatively dry viscous materials control thermal changes
improved characteristics of product uniformity of product
What is an extruder?
device to shape by forcing material through a specially designed opening often after a previous heating
of the material
Types of extruders by function:
Forming
pasta (traditional) high-pressure (plastics)
Cooking
low-shear cooking (precooked pasta - Collet (puffed cereals - “Kix”)
Texturizing
high-shear cooking (high protein)
Extruder Parts & Components:
power supply - operates main screw feeder - regulates rate/pressure of flow barrel - surrounds screw(s)
screw (single or twin) - conveys material die or nozzle - shapes product
special arrangements or attachments - example: knife, co-extrusion unit
Saibainuo Machinery
Food Machinery--High quality.Factory price!
Email: extruder@foodmachine.cc
website: www.china-food-extruder.com
Phone(Whatsapp): +0086 18668988231