What is mold constant?

The mold constant B depends on the properties of the metal, such as density, heat capacity, heat of fusion and superheat, and the mold, such as initial temperature, density, thermal conductivity, heat capacity and wall thickness. The S.I. units of the mold constant B are s/m2.

Why can liquid metal be poured into a block shaped mold?

Resovoir in the mold which is a source of liquid metal to compensate for shrinkage of the part during solidification.

What is the difference between a pattern and a core in sand molding?

10.7What is the difference between a pattern and a core in sand molding? Answer. The pattern determines the external shape of the cast part, while a core determines its internal geometry if the casting includes a cavity.

What are the limitations of casting?

Limitations of casting process

Generally Dimensional accuracy of casting products (in case of sand casting) are not so good and can not be used for final use.
Sand casting process is labor intensive.
With some materials it is not possible to overcome defects arising due to moisture present in sand.

What are the advantages and disadvantages of die casting?

Advantages of die casting: High productivity. Good dimensional accuracy….Disadvantages of die casting:

Not applicable for high melting point metals and alloys (eg. steels)
Large parts can not be cast.
High die cost.
Too long lead time.
Some gases my be entrapped in form of porosity.

What are the advantages and limitations of casting process?

The casting process is used to produce components such as pistons, mill rolls, wheels, cylinder blocks, liners, machine tool beds….Limitations of casting process:

With normal sand casting process, the dimensional accuracies and surface finish is less.
Defects are unavoidable.
Sand casting is labor intensive.

What are different types of casting?

10 Different Types of Casting Process

（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 a soft cast used for?

A soft cast is usually made from flexible fiberglass material that is molded to the patient’s injury. They can be used by athletes after the healing of an injury for extra support and a lower risk of recurrent injury. A soft cast is mostly for partially healed wrist fractures or for any other small fractures.

How long should a soft cast stay on?

Plaster casts are made up of a bandage and a hard covering, usually plaster of paris. They allow broken bones in the arm or leg to heal by holding them in place, and usually need to stay on for between 4 and 12 weeks. Taking good care of your cast will help ensure a better recovery.

What’s the difference between a soft cast and a hard cast?

Couple of things: A hard cast is made of plaster or fiberglass a soft cast is usually an unna boot RAP that allows flexibility.

What can you do if you have an itch inside your cast?

A cast can cause your child’s underlying skin to feel itchy. To relieve itchy skin, turn a hair dryer on a cool setting and aim it under the cast. Don’t allow your child to stick objects, such as a coat hanger, inside the cast to scratch his or her skin. This could cause an injury or infection.