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