Little or no machining required post casting process
.
Low levels of porosity
.
Good surface texture
.
Fine micro-structures with higher strength components
.
No waste
material, 100% utilization.
What is casting its advantages?
Advantages of casting process:
Molten metal flows into small ant section in the molten cavity
. Hence any complex shape can be easily produced. Practically any material can be casted. Ideal method is by producing small quantities.
What are squeeze casting advantages Mcq?
Explanation: The squeeze casting has
very low gas entrapment
, lower shrinkage cavities, lower die costs, and very high quality of surface with fine details of castings. Also, it produces fine grain size to improve the mechanical properties of the castings.
What are the advantages and disadvantages of die casting?
- High productivity.
- Good dimensional accuracy.
- Good surface finish: 2-100 μinch (0.5-2.5 μm) R
a
. - Thin wall parts may be cast.
- Very economical process at high volume production.
- Fine Grain structure and good mechanical properties are achieved.
- Intricate shapes may be cast.
What is the drawback of using the sand casting process?
Low strength
– Low material strength due to high porosity compared to a machined part. Low dimensional accuracy – Because of shrinking and the surface finish dimensional accuracy is very poor. Poor surface finish – Due to internal sand mould wall surface texture.
Which of the following is an advantage of centrifugal casting Mcq?
Which of the following is the main advantage of using the centrifugal casting method? Explanation: In centrifugal casting technique,
there is no need for the gates and runners to be used in the process
, which can save a lot of molten metal.
What are disadvantages of casting?
- It gives poor surface finish and mostly requires surface finish operation.
- Casting defects involves in this process.
- It gives low fatigue strength compare to forging.
- It is not economical for mass production.
What are types of casting?
- (1)Sand casting.
- (2)Investment casting.
- (3)Die casting.
- (4)Low pressure casting.
- (5)Centrifugal casting.
- (6)Gravity die casting.
- (7)Vacuum die casting.
- (8)Squeezing die casting.
What is the main purpose of casting?
CASTINGS
KEEP THE WORLD MOVING
The solidified part is also known as a casting, which is ejected or broken out of the mould to complete the process. Casting can enable a complex part to be made in one piece often eliminating machining, assembly and fabrication steps.
Is die casting fast?
Die casting is an automated casting process in which the liquid melt is pressed into a mold under high pressure (150 to 1200 bar) and at a high filling speed
(up to 540 km/h)
. Die casting is one of the most economical and quickest forming processes.
Why die casting is preferred?
In general, die casting
produces stronger parts with closer tolerances that have greater stability and durability
. Die cast parts also have greater resistance to temperature extremes and superior electrical properties. When compared to plastic injection moldings with the same dimensions, die cast parts are stronger.
What are the advantages and disadvantages of permanent mold casting?
- Produces dense, regular castings by high dimensional precision.
- Low dimensional tolerances: usually about 0.04” (1 mm}.
- Excellent surface finish and grain structure.
- Rapid production rate with low scrap loss.
- Low shrinkage and gas porosity.
What are the pros and cons of sand casting?
| Advantages of Sand casting Disadvantages of Sand casting | Simple production process Handmade process | Low cost Casting molds Low strength | Lower production costs Low dimensional accuracy | Wider material choice Rough surface quality |
|---|
How accurate is sand casting?
The process has high dimensional accuracy, with a
tolerance of ±0.010 in for the first inch and ±0.002 in/in thereafter
. Cross-sections as small as 0.090 in (2.3 mm) are possible. The surface finish is very good, usually between 150 and 125 rms.
Why is it called investment casting?
Investment casting is so named because
the process invests (surrounds) the pattern with refractory material to make a mould, and a molten substance is cast into the mold
.
Is casting permanent?
Permanent mold casting is
a metal casting process
that employs reusable molds (“permanent molds”), usually made from metal. … A variation on the typical gravity casting process, called slush casting, produces hollow castings. Common casting metals are aluminium, magnesium, and copper alloys.
