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MOULDING PROCESS
PREPARED BY:
ANKUR GOEL
ME 3rd Yr (A)
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Moulding Defination
Moulding is the process of manufacturingby shaping appliable raw material using a
rigid frame or model called a pattern.
http://en.wikipedia.org/wiki/Manufacturinghttp://en.wikipedia.org/wiki/Manufacturing -
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Types of Moulding
1. Injection moulding
2. Compression moulding
3. Transfer moulding
4. Extrusion moulding
5. Blow moulding
6. Rotational moulding7. Shell moulding
http://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_moldinghttp://en.wikipedia.org/wiki/Injection_molding -
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1. Blow Moulding
Blow molding a shape is a commonindustrial process. The example shown
below is of the production of a plasticbottle. The plastics normally used in thisprocess are; polythene, PVC and
polypropylene.
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The Process
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Process illustration
1. The plastic is fed in granular form into a 'hopper' thatstores it.
2. A large thread is turned by a motor which feeds the
granules through a heated section. 3. In this heated section the granules melt and become
a liquid and the liquid is fed into a mould.
4. Air is forced into the mould which forces the plastic to
the sides, giving the shape of the bottle. 5. The mould is then cooled and is remove
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2. Injection Moulding
Materials such as polystyrene, nylon,polypropylene and polythene can be used
in a process called injection molding.
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Injection Moulding
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Injection Moulding
A profile cutter is used to trim away anywaste or rough material. This is a high
speed cutter which is designed to smooththe edges so that sharp edges areremoved.
Cutter is shown as
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Injection Moulding
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Injection Moulding
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3. EXTRUSION Moulding
A machine used to extrude materials is verysimilar to the injection moulding machine above.
A motor turns a thread which feeds granules ofplastic through a heater. The granules melt intoa liquid which is forced through a die, forming along 'tube like' shape. The extrusion is then
cooled and forms a solid shape. The shape ofthe die determines the shape of the tube.
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EXTRUSION Moulding
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EXTRUSION Moulding Products
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4. Shell moulding Shell moulding is a process for producing simple
or complex near net shape castings, maintainingtight tolerances and a high degree ofdimensional stability.
Shell moulding is a method for making highquality castings.
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Applications
-Crankshaft fabrication
-Steel casting parts, fittings
-Molded tubing fabrication
-Hydraulic control housing fabrication
-Automotive castings (cylinder head andribbed cylinder fabrication).
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5. Plaster Moulding
Design using the plaster of Paris" powder
Form is called plaster molding.
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Plaster Designs
http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=59http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=55http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=52http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=56http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=50http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=48 -
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Examples
Plaster Ceiling Showroom
http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=61http://www.plastermouldingsonline.com/hodkin/plaster-coving-architectural-mouldings.asp?fldAuto=60 -
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6. Rotational moulding
Rotational molding or moulding is aversatile process for creating many kinds
of mostly hollow plastic parts. The phraseis often shortened to rotomolding orrotomoulding.
http://en.wikipedia.org/wiki/Molding_(process)http://en.wikipedia.org/wiki/Plastichttp://en.wikipedia.org/wiki/Plastichttp://en.wikipedia.org/wiki/Molding_(process) -
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Rotational moulding
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7. Transfer moulding
Transfer molding, like compressionmolding, is a process where the amount of
molding material (usually a thermosetplastic) is measured and inserted beforethe molding takes place.
http://en.wikipedia.org/wiki/Compression_moldinghttp://en.wikipedia.org/wiki/Compression_moldinghttp://en.wikipedia.org/wiki/Thermosethttp://en.wikipedia.org/wiki/Plastichttp://en.wikipedia.org/wiki/Plastichttp://en.wikipedia.org/wiki/Thermosethttp://en.wikipedia.org/wiki/Compression_moldinghttp://en.wikipedia.org/wiki/Compression_molding -
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Transfer moulding
Transfer molding provides productconsistency. Transfer molding has short
cycle times. Transfer molding is suited forrubber to metal bonding.
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Mouldings and Applications
Casing
Casing is the wood trim or moulding
applied to openings such as doors,windows and archways. Casings are usedto cover the gap between the wall and the
frame. Casings are the most visible trim ormoulding and as such help define thecharacter of a room.
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Mouldings and Applications
Hand Rails
Hand Rails are attached along a wall to be
used as hand support along a stairwell orhallway. Hand Rails also provideprotection for walls in high traffic areas.
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Mouldings and Applications
Nosing
Nosing is the trim that creates the
rounded edge of a stair tread. Thefinished moulding covers the edge ofrisers.
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Mouldings and Applications
Picture Frame Moulding
Picture Frame Moulding is a trim applied
to a wall near the top of a ceiling. The toplip supports hooks to hang framed picturesor decorative plates. Picture Frame
Molding adds a colonial or warmtraditional feel to a room.
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Mouldings and Applications
Window Sills
Window Sill Moulding is installed below
the window sash. Window Sills aresometimes called "window stools." Trim isoften added under the Window Sill for a
more decorative and finished look.
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Mouldings and Applications
Rope Moulding
Rope Moulding is a finishing trim with a
decorative twisted pattern. Rope moldingis often used in compound CrownMouldings, on mitered cabinet doors and
in amny creative, custom designs.
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Mouldings and Applications
Door Stop Molding
A Door Stop is the trim that prevents the
door from closing past the door jamb. TheDoor Stop molding is applied to one sideof an interior door frame or the interior
side of a transom or sidelite jamb.
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Thank You