Metal Casting Zone Info Blog

Posts Tagged ‘reusable molds’

Information about various Castings Process and Types

Casting history is older than 6000 years. A casting is also known is molding process in which any metal is poured in to the mold. It is one type of manufacturing process in which every metal poured in mold. Generally, casting is uses for creating desired an most intricate of shapes..

Casting can remove other operational processes like machining, forging, and welding. There are different types of casting method or process available today. Generally casting process is divided in to 2 types expendable casting and non-expendable mold casting.Temporary and non-reusable molds are used in expendable casting process. Sand casting, Plaster Casting, Shell Molding, and Investment Castings process are one of the expendable casting processes.

This is oldest metal forming or casting process. Lost wax casting used for to manufacturing of huge parts like turbocharger wheels, golf club heads, elect huge variety of parts ranging from turbocharger wheels to golf club heads, from electronic boxes to hip replacement implants. Lost wax casting used for investment castings. Today investment castings are used for aircraft engine and airframe parts. Lost wax casting is similar to the Lost Foam Casting in which expendable foam patterns are uses for casting productions. Foam pattern is remaining in mold during metal pouring and it’s replaced by molten metal

Die Casting Die casting is one of the non expandable casting process. It’s one type of process in which molten metal is forced under high pressure into mold cavities. In die casting mold dies is used again and again for producing variety of casting size, shape and thickness. Parts, which are manufacturing by die casting are heat resistance and maintaining close tolerances. Die casting produces parts with thinner walls, closer dimensional limits, and smoother surfaces

Sand Casting Sand casting used for make large parts. In sand casting sand used with mold. In sand casting cavity is formed by wood or metal pattern. Using sand casting method, you can cast large iron bell, and alos small automotive parts. In sand casting, two types of sand used like green sand, which is mixture of silica, and olivine sand. Sand casting is uses for high volume production

More Sand Casting Articles

Die casting is a custom manufacturing process that produces engineered metal parts by injecting molten metal under very high pressure into reusable molds, called “dies,” made from premium tool steel. The dies can be designed to cast very complex shapes and sharply defined product features with a high degree of accuracy and repeatability, often with no post-casting machining required to meet part specifications. Unusually smooth surfaces can be produced as-cast, as well as a variety of textured surfaces. Die castings are suitable for a range of cosmetic finishes to match other mated parts or add extra durability in use.

Advanced high-pressure die casting, with some machines operating at die clamping forces exceeding 4500 pounds per square inch, is capable of producing net- or near-net-shape castings of high integrity and dimensional precision— at very high cycle speeds. A complete die casting cycle can vary from less than one second for small components weighing less than an ounce, to no more than two-to-three minutes for a casting of several pounds.

The process’ advantages make die casting the most efficient technology available for producing a wide range of commercial, industrial and consumer products in durable, rigid metal. A range of metals can be die cast, but the majority of die castings are non-ferrous parts, in aluminum, magnesium and zinc. High pressure die casting is an efficient, economical process that offers a broader range of shapes within closer tolerances than many other metal manufacturing techniques. Die cast parts are used in many industries including automotive, locomotive, agricultural, marine,  and plumbing.

Casting process started about 6000 years ago. The oldest surviving casting figure is of a copper frog from 3200 BC. Casting may be used to form most intricate of shapes, both internal and external. With the use of casting, we can minimize or eliminate several operations like machining, forging and welding.

With the advancement in technology, casting is now playing a greater role in our lives than before. Even in construction, objects are now casted in a single piece which would otherwise require assembly of several pieces if made by other methods. The example is flyover construction, where material like cement, concrete, iron are casted In a required shape and then fixed.

There are several other advantages of metal casting process including meeting the requirements of mass production. In automobile industry, thousands of cast engine blocks and transmission cases are produced every year. Through casting, heavy metal objects can be casted which would otherwise be difficult to produce. Hydroelectric plant parts, pump housing, valves are examples of the advantages of metal casting.

The casting process is further divided into expendable casting and non-expendable mold casting. Expendable casting includes Sand Casting, Plaster Casting, Shell Molding and Investment Casting This type of casting involves the use of temporary and non-reusable molds.

Non-expendable mold casting includes at least four different methods including permanent mold casting, die casting, centrifugal casting and continuous casting.

I will give you definitions of major casting processes that are used to make metals for different industries.

Die Casting

Die casting is a process for producing engineered metal parts by forcing molten metal under high pressure into reusable molds often called as dies. These dies can be designed to produce complex shapes with a high degree of accuracy and repeatability. Most die castings are made from nonferrous metals, specifically zinc, copper, and aluminum based alloys, but ferrous metal die castings are possible.

Aluminum Casting Process

Aluminum is one of the few metals that can be cast by all of the processes used in casting metals. There are factors like cost, quality and feasibility that affects production of aluminum parts. If you are interested in contacting suppliers of aluminum, ferrous and non-ferrous casting.

Investment Casting

Investment Casting is one of the oldest methods for metal forming. It is also called as lost-wax casting. Investment casting process is generally used for small castings but the process has also produced aircraft doors, heavy steel casting and aluminum casting. This process is more expensive than die casting or sand casting. Investment casting process is generally used for aerospace and power industries.

In the end, I would like to say that casting are helping the industries grow. They are shaping the future. They play an important role in our lives and made life much easier for us.