Please read :
- Comparison of unlike casting processes.
- What is casting ? Main application of castings
- Basic Steps of Sand casting
Basic Operation of the casting process
- First nosotros lead maintain to brand a pattern
- Then the nosotros lead maintain to melt the metallic yesteryear applying heat
- pouring the metallic into the mold as well as confirming that the metallic gets the desired shape.
What is Pattern inwards Casting Process
Why a proficient Pattern is required inwards casting ?
- To obtain the desired kind as well as size.
- It is slow to pattern as well as manufacture.
- making a pattern is non expensive.
- It is of high strength.
Pattern Materials
- Wood
- Cast Iron / Brass
- Aluminum or White metal
- Plastic gypsum
For a consummate cognition of pattern materials become to this link
Pattern Allowances
- Shrinkage allowance (due to cooling)
- Machining allowance (due to machining)
- Shaking allowances (due to rapping)
- Draft allowance (follow the link)
- Distortion allowance (due to irregular shape)
For a consummate cognition near the allowances inwards patterns follow this link
Different Types of Patterns used inwards Casting
- Split slice pattern
- Match plate pattern
- cope as well as drag patterns
- sweep patterns
- draw backs
- Loose slice pattern
- Gated pattern
Preparing Mould for the Casting
While preparing mould 1 should live rattling careful . Different types of sands as well as binders are used inwards mould preparation. These are
Green sand mould: Natural sands , clay as well as H2O is used inwards making greenish sand mould. It is rattling inexpensive alongside acceptable errors.
Dry Sand Mould: It is natural sand mould alongside cereal as well as pitch used binders.
Other materials for mould training includes silica sand as well as binder alongside additives.
Please Read :
- Different types of molding sand
- Advantages as well as Disadvantages of Different Sand Casting Processes
Different Properties of the moulding sand
These are the desired properties of the moulding sand
- Refractoriness
- Cohesiveness
- Permeability
- Co-efficient of expansion
- Adhesiveness
- Collapsibility
- Plasticity
For details of each of the properties follow this link :
Tests for the unlike moulding sands
- Moisture Content Test
- Fineness Test
- Testing Amount of Clay
- Permeability Test
- Mould hardness test
- Strength or cohesiveness test
Core Making
What is Core ?
It is a construction made of refractory fabric . It is prepared earlier pouring the molten metallic on to the cavity. There is or as well as then other term known equally substance impress which is the projection on a pattern used to brand spaces inwards the mould. It is likewise known equally substance seat.
Criteria for selecting a furnace for casting
- Capacity needed to concur the molten metal
- Melting rate
- Quality of the melt
- Temperature needed
- Method of pouring
Operation inwards Cupola Furnace
Cupola is the most pop furnace for casting non ferrous as well as ferrous materials . It is known equally a shaft furnace. The trounce of cupola furnace is made of steel of 8-10 mm thickness. The trounce is supported yesteryear columns or legs. The within of the furnace is lined alongside refractory fabric to salvage the furnace from over heating.
Different types of casting processes
- Sand Casting
- Shell Mold Casting
- Expandable Mold Casting
- Plaster Mold
- Ceramic Mold
- Investment Mold or Lost Wax Casting
- Permanent Mold
- Die Casting
- Centrifugal casting
And lastly comes the casting defects. These defects tin sack occur for unlike reasons similar air trapping inwards the sand mold, depression character sands, improper ramming , defecting sand mold etc. Go through this link for detailed cognition of casting defects.