What is the function of the ejection system in injection molding?
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To separate the product from the mold before chemical bonding takes
place.
,What are the advantages and disadvantages of welding when compared to other
assembly operations?
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Welding pros- Faster, cheaper, more durable, stronger. Welding cons-
Permanent, less predictable, not all metals are weldable, thin sheets are
difficult to weld.
What is a chamfer?
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An angled cutoff of an edge.
What is the function of reaming?
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To improve tolerance on a drilled hole.
What type of mold is used in sand casting?
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, Expendable mold casting
Which types of casting qualify as precision casting processes?
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Shell molding, lost wax/foam, investment casting, and maybe die casting.
What is the parting line in plastic injection molding?
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Where excess polymer leaks out of the mold cavity.
What are burrs?
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Small pieces that remain attached to a material after machining.
What is the function of tumble deburring?
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, To smoothen and polish rough surfaces.
List three differences between thermoset plastics and thermoplastics.
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Thermoset- Permanent, harder, brittle/stiff, 3D cross linked, heated to set.
How is a soda can made?
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Deep drawing
What materials are cutting tools commonly made from?
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Carbide, steel, non-ferrous cast alloys, ceramics, and sintered oxides.
What is a procedure applied to worn grinding wheels to expose fresh abrasive grit
and remove chips that have clogged the wheel?
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Give this one a try later!
To separate the product from the mold before chemical bonding takes
place.
,What are the advantages and disadvantages of welding when compared to other
assembly operations?
Give this one a try later!
Welding pros- Faster, cheaper, more durable, stronger. Welding cons-
Permanent, less predictable, not all metals are weldable, thin sheets are
difficult to weld.
What is a chamfer?
Give this one a try later!
An angled cutoff of an edge.
What is the function of reaming?
Give this one a try later!
To improve tolerance on a drilled hole.
What type of mold is used in sand casting?
Give this one a try later!
, Expendable mold casting
Which types of casting qualify as precision casting processes?
Give this one a try later!
Shell molding, lost wax/foam, investment casting, and maybe die casting.
What is the parting line in plastic injection molding?
Give this one a try later!
Where excess polymer leaks out of the mold cavity.
What are burrs?
Give this one a try later!
Small pieces that remain attached to a material after machining.
What is the function of tumble deburring?
Give this one a try later!
, To smoothen and polish rough surfaces.
List three differences between thermoset plastics and thermoplastics.
Give this one a try later!
Thermoset- Permanent, harder, brittle/stiff, 3D cross linked, heated to set.
How is a soda can made?
Give this one a try later!
Deep drawing
What materials are cutting tools commonly made from?
Give this one a try later!
Carbide, steel, non-ferrous cast alloys, ceramics, and sintered oxides.
What is a procedure applied to worn grinding wheels to expose fresh abrasive grit
and remove chips that have clogged the wheel?
Give this one a try later!
