Powder metallurgy involves blending metal powders, compacting them under pressure into a desired shape, and then sintering the compressed material at high temperatures to bond it together. The key steps are compacting powdered materials into a shape and then sintering to fuse the materials. Powder metallurgy allows forming complex shapes without extensive machining and has been used since ancient times to produce metal objects.
Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify.
Production Technology Lecture Notes as per GGSIPU SYLLABUS FOR UNIT 1.
Casting is a process in which molten metal is allowed to solidify in a predefined mould cavity. After the solidification by breaking the mould the component is taken out. This is known as CASTING.
Pattern is a replica of a object to be made with some modifications.
Pattern Materials
Difference between Pattern and Casting
Types of Patterns
Pattern Design Considerations
Pattern Allowances
Pattern Making
Pattern Layout
Properties of moulding sand
Testing of Moulding Sand
Special casting process
Die casting process: Principles, applications and industrial useMayurjyotiNeog
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The Indian detergent industry is about three decades old. An interesting and unique feature of detergent industry in India is the existence of non power operated units which do not use any electrical power for the production of detergent powder. But the production technology of detergents have been changed involving high technique in process control, more skilled personnel and requiring large input.
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Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify.
Production Technology Lecture Notes as per GGSIPU SYLLABUS FOR UNIT 1.
Casting is a process in which molten metal is allowed to solidify in a predefined mould cavity. After the solidification by breaking the mould the component is taken out. This is known as CASTING.
Pattern is a replica of a object to be made with some modifications.
Pattern Materials
Difference between Pattern and Casting
Types of Patterns
Pattern Design Considerations
Pattern Allowances
Pattern Making
Pattern Layout
Properties of moulding sand
Testing of Moulding Sand
Special casting process
Die casting process: Principles, applications and industrial useMayurjyotiNeog
The short presentation gives insights to some die casting process, its principles, applications and some industrial use. It also includes different die casting methods.
How to Manufacture Detergents Powder, Active Ingredients for Detergents, Surf...Ajjay Kumar Gupta
The Indian detergent industry is about three decades old. An interesting and unique feature of detergent industry in India is the existence of non power operated units which do not use any electrical power for the production of detergent powder. But the production technology of detergents have been changed involving high technique in process control, more skilled personnel and requiring large input.
See more
http://goo.gl/U4s0Ry
http://goo.gl/oFYalm
http://goo.gl/xbbtO0
http://www.entrepreneurindia.co/
Tags
Technology Book on detergent, Active Ingredients for Detergents, Cleaners, components of detergents, Detergent Formulation Consulting In India, Detergent Powder Business, Profitable Small Scale Manufacturing, Detergent Powder Flow sheet, Detergent Powder Ingredients, Detergent Powder Line, Detergent Powder Making Formula, Detergent Powder Making Formula Pdf, Detergent Powder making machine factory, Detergent Powder Making Plant, Detergent Powder Making Process Pdf, Detergent Powder Making Process Video, Detergent Powder Making Raw Material, Detergent Powder Making Small Business Manufacturing, Detergent Powder Manufacturing Industry in India, Detergent Powder Manufacturing Plant, Detergent Powder Manufacturing: Small Business Idea, Detergent Raw Material - Washing Powder Raw Material Suppliers, Enzymatic Detergents Empower, Fabric Wash, Formulation of Detergents, General Wash Powders, Get started in small-scale Detergent Powder manufacturing business, Household Detergent, Household Laundry Detergent Powders, How Laundry Detergent Is Made - Material, Manufacture, Making, How to Make Detergent Powder, How to Manufacture Detergent and Cleaning Products, How to Set Up Start Detergent Powder Manufacturing Business in India, How to Start a Detergent Powder manufacturing business?, How to Start a Powdered Detergent Plant, How to Start Detergent Powder Manufacturing Industry in India, How to Start: Detergent, Washing Powder Business in India, Industrial Detergents, Ingredients - Laundry Detergent – Recipe, Introduction to Detergents, Laundry Care, Laundry Detergent Production, Laundry Detergents Formulation - Chemistry in Surfactants, Liquid Detergents, Manufacturing Detergent Cakes, Manufacturing of Detergent Powder, Most Profitable Detergent Powder Manufacturing Business Ideas,Powder Detergent Manufacturing Process, Setting up and opening your Detergent Powder manufacturing Business, Setting up of Detergent Powder Manufacturing Units, setup a detergent industry, The Product Formulation and Procedure of detergent, Washing Powder Manufacturing Plant, Washing Soap and Detergent, What Is the Production Process for Powder Detergent?, Starting a Detergent Powder Manufacturing Business, Surfactant, Synthetic Detergent, Synthetic-Detergents-Manufacturing Process,
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Size reduction may be achieved by two methods:
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2] Mechanical process
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2] Mechanical process: Mechanical force is introduce by using different equipments like ball mill, colloid mill etc.
Powder metallurgy (PM) is a term covering a wide range of ways in which materials or components are made from metal powders. PM processes can avoid, or greatly reduce, the need to use metal removal processes, thereby drastically reducing yield losses in manufacture and often resulting in lower costs.
Conventional Powder-Metallurgy Process
The powder-metallurgy (PM) process, depicted in the diagram below, involves mixing elemental or alloy powders, compacting the mixture in a die and then sintering, or heating, the resultant shapes in an atmosphere-controlled furnace to metallurgically bond the particles.
One of the welding processes that used in Engineering field is the thermit welding. There are several types of welding processes similar to this, but thermit welding has its unique features.
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Powder metallurgy
1. Powder Metallurgy is the process of blending
fine powdered materials, pressing them into a
desired shape or form (compacting), and then
heating the compressed material in a controlled
atmosphere to bond the material (sintering and
presintering).
The final component usually does not require
further machining processes.
2. There are 2 main requirements of any material
for it to be processed by powder metallurgy:
1. The metal in the powder form must be able to
respond to solid phase welding.
2. The metal powder must be capable of
sufficiently close packing under pressure to
permit welding to take place and In case of
alloys, be capable of being sufficiently and
intimately mixed.
3. The early Egyptians made metal products by application
of powder metallurgy principles as early as 3000 B.C.
In 1829, an Englishman made ductile platinum by cold
pressing and sintering.
In 1870, Auervan Welsbach prepared osmium filament
by using powder metallurgy.
In 1916,the first commercial tungsten wire was
produced by this technique.
Powder metallurgy was used in Germany for producing
tungsten carbide tool tips after the first world war.
Powder metallurgy became widely recognised after
1945 and today, parts which cannot be formed using
other processes are made using this process.
4. Porous products like bearings and filters.
Refractory parts made from tungsten and molybdenum used in
electric bulbs and radio valves, x ray tubes ,etc
Products of complex shapes like gears which need complex
machining when made by other processes.
Automotive components like electrical contacts
, crankshafts,camshafts, piston rings , brackets, brake
linings, connecting rods ,etc.
Products from materials that are very difficult to machine like
tungsten carbide , etc Components are gauges , wire drawing
dies, wire guides , deep drawing, stamping and blanking tools
stone hammers, rock drilling bits.
Tungsten parts used in high temperature operations like nozzles
for rockets and missiles.
Grinding wheels, clocks and other timing devices ,
5. The performance of metal powders during processing
and the properties of the product are highly dependent
on the characteristics of the metal powders that are used.
The most important characteristics of metal powders are :
1. Purity
2. Chemical composition
3. Particle size
4. Particle shape
5. Size distribution
6. Particle microstructure
7. Apparent Density
8. Flow rate
10. The parts made by powder metallurgy are
usually brittle and difficult to handle before
they are sintered.
To overcome this, the compacted parts are first
heated at a temperature lower than the actual
sintering operation temperature.
This gives the parts sufficient hardness and
strength to be handled and machined as
required.
Presintering also removes lubricants and
binders added to the powders earlier.
11. After being compressed into the required
shape, the required components are sintered.
Sintering is done to achieve the maximum possible
hardness and strength needed in the final product.
Sintering is usually done at 70- 80% of the metal’s
melting temperature in an inert atmosphere of
hydrogen, ammonia or other hydrocarbons.
The sintering time varies from thirty minutes to
several hours depending on the metal used.
Sintering causes the bonding of the solid particles
within the component. Once cooled, the powder
bonds to form a solid piece.
12.
13. Metal powders are contained in an enclosure e.g. a rubber
membrane or a metallic can that is subjected to isostatic,(that is
uniform in all directions,) external pressure. As the pressure is
isostatic, the as-pressed component is of uniform density. This will
then be sintered in a suitable atmosphere to yield the required
product.
Normally this technique is only used for semi-fabricated products
such as bars, billets, sheet, and roughly shaped components, all of
which require considerable secondary operations to produce the
final, accurately dimensioned component. Again, at economical
working pressures, products are not fully dense and usually need
additional working such as hot extrusion, hot rolling or forging to
fully densify the material.
14.
15. 1. Graphite: Refractory graphite, Control rods for
nuclear reactors.
2. Ferrites: Parts like permanent
magnets, computer memories ,electronic
components
3. Ceramics : Tubes, tiles, nozzles and linings.
4. Metal powders : High speed tool
steels, superalloys, stainless steel, titanium
alloys , berylium , etc.
16. Uniform Density of Compacted objects
High strength and good handling properties of
compacted body
Reduction in internal stresses
Possibility of combining powders without
additional binding compounds
Low tool costs
Low material and finishing costs
17. Dimensional control of the compacted objects is
a little less precise than other methods.
The surfaces of pressed components are not
very smooth.
This process is generally a low production
process and is thus used rarely.
The flexible molds used in CIP dies usually
have a short life.
18. The dimensional accuracy and the desired surface finish
can be maintained.
Cleaner and quieter operation.
Longer life of components due to enhanced
microstructure and lack of defects.
High production rates even with complex shapes.
Highly qualified labor not required for operation.
99.9% utilization of material, negligible amount of scrap.
Certain mixtures or alloys can be obtained through this
process. (for eg. It is very difficult to produce lead and
copper alloys in the liquid form. However, the problem of
immiscibility can be averted by mixing both elements in
the powder form and then shaping it by powder
metallurgy.
19. It is difficult to produce certain shapes which require
the flow of metal which is not possible in powder form.
The parts made by powder metallurgy may be brittle if
not sintered properly.
The dies for this method are quite expensive.
The size of the products that can be manufactured is
limited due to the high costs of large dies and material
handling.
Powder metallurgy is un-economical for small scale
production.
Some metals are difficult or impossible to compress
due to their tendency of sticking to the walls of the die
under high pressures.
Disadvantages of Powder
metallurgy over other processes