Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Describe the extrution process?
The extrusion process, in many cases produces material in an intermediate form for subsequent reprocessing to its final component form. The process is the same as for metals, that is, the expulsion of material through a die of the required cross-section. Simplicity in operation and a controlled pressure which can be virtually high as required. If the polymer can be plasticized by pressure, then the ram extruder is advantageous in view of its simplicity. But for plastics which require heat, the separate pre-processing mat be regarding as a draw back. Another major drawback of this type of machine is the reciprocating action of ram which is time wasting since the ram must be withdrawn after its power stroke and a new dolly of material inserted in the container. Also, with many materials, the die office must be cleaned between each working stroke.
Nowadays, the ram machine is mainly used for "wet extrusion" that is for extruding plastics which have been softened by the addition of solvents. Solvent has to be removed.
For extrusion of plastics, single-screw machine has completely replaced the ram type machine. There are two basic types of screw extruders: the melt extruder and the plasticizing extruder. In the formal, the material is delivered to the extruder already melted and thus the function of the extruder is merely to push the material to the die and through the orifice. In the plasticizing extruder the material is in the form of granules or particles and so the extrude has to compress and work it until it melts before delivering it, under pressure, to the die orifice.
A steel plate with dimension shown in sketch (a) below is subjected to P = 150 kN tensile force and M= 300 N-m bending moment. The plate is made of AISI 1080 steel. A hole is to be
How can I achieve a back and forth movement of carriage system. How can I reverse the motor to go back and forth.
(a) Calculate the natural frequency of mass m = 1 Kg placed at one end of a cantilever beam of negligible mass. Length of cantilever = 500 mm, d = 30 mm, b = 20 mm, E = 210x10 9 N
How many types of Foundations are there Foundations are broadly classified into two types, viz., shallow and deep foundations with respect to the width (B) and depth (D) below
write short note on''coefficient of insensitiveness''of governors.
Equilibrium conditions: What are equilibrium conditions for non concurrent force system? Sol.: For the Equilibrium of non concurrent forces there are three conditions:
Friction is Desirable: A friction is much desirable to stop the body from its moving condition. If there is no friction between contact surfaces, then the body cannot be st
Explain how chips are prepared in cutting and how are they classified with sketches. What are the factors responsible for creation of different forms of chips?
Q. What is Warm extrusion? • Warm extrusion is done above room temperature, but below the recrystallization temperature of the material the temperatures ranges from 424 to 975
Parts of Motorcycle Figure: Right Side View of a Motorcycle 12 Part No. Name Functions 1 Muffler he
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd