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Shapet Electric Company M anufacturer of Induction melting machine, casting machine, Brazing machine, hardening machine, etc. What is Metal Casting?. Introduction of Casting : -.
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Shapet Electric CompanyManufacturer of Induction melting machine, casting machine, Brazing machine, hardening machine, etc. What is Metal Casting?
Introduction of Casting :- • Casting can be defined as a process of manufacturing, which implies pouring of liquid material into a Mold containing a desired shaped. • The process of casting involves melting metal at desire temperatures and using molds to then shape the metal into new item. • Metal casting is a great way to build hard to find pieces for models, restoration projects and even just small replacement parts needed for common household items
Types of Casting • Sand casting • Plaster mold casting • Shell molding • Investment casting • Evaporative-pattern casting • Lost-foam casting • Full-mold casting • Permanent mold casting • Die casting • Semi-solid metal casting • Centrifugal casting • Continuous casting
InvestmentCasting • The Investment casting is known as the "lost wax casting process" and as "precision castings (silica sol precision casting process)". • investment casting product is applied in automobile, construction, railway, ship, mining, engineer machinery, jewellery and hardware etc • Investment casting is an extremely cost effective and highly accurate process. Also, many high strength and corrosion resistant materials can be used in investment casting.
A pattern made of wax is coated with a refractory material to make mold, after which wax is melted away prior to pouring molten metal. • "Investment" comes from a less familiar definition of "invest" - "to cover completely," which refers to coating of refractory material around wax pattern. • It is a precision casting process - capable of producing castings of high accuracy and intricate detail
Pattern Assembly Investing Molding Dewaxing Firing Casting Knockout Finishing Investment Casting process
Jewellery casting Step One: The Model Everything that will ever be cast starts with a Model. The model can be made out of many different materials. The model can be an item that has already been produced in metal, a wax carving, a plastic carving, or just about anything that will not react to the mold rubber negatively. If you have an idea for an item that you would like cast but cannot carve wax or shape metal, we can help. We have model makers that can take your idea and turn it into a work of art. Model making is often done on computer and then the model is produced with a Rapid Prototype Machine. This method is not the cheapest but generally produces the best results if carving or fabricating your own model is not an option.
Step Two: The Mold Molds are used to produce wax replicas of your model. There are two kinds of molds that we produce. The first type of mold is the Rubber Vulcanized mold and is used, generally for metal models that can with stand heat to approximately 350 degrees. The second type of mold is the Room Temperature Vulcanized mold and is usually used for wax or plastic models. Both types of molds reproduce your models accurately.
Step Three: The Waxes By injecting molten wax into the mold, waxes replicas of your item will be produced. Waxes can be injected into molds about once every two to three minutes. This allows for mold cooling and wax hardening. Once we have the wax replica of your item we then put them on wax trees. The wax trees will often contain as many as one hundred or more items or as few as one.
Step Four: Flasks and Investment Once the wax trees are finished, they are placed in a metal flask. The flask will then be filled with a plaster investment that covers the wax tree. The plaster Investment dries and is then ready for the casting burn out ovens.
Step Five: Burning out the Wax After the Investment has completely dried, the flasks are place into the burn out ovens and a 12 to 16 hour burn out cycle begins. This is where the Lost Wax Casting name comes from. The wax is slowly burned out to leave a plaster Investment mold that will be used to pour the casting metal into.
Step Six: The Casting The casting is done by placing the flasks in a Induction bottom pouring vacuum casting or Vacuum pressure casting machines and then heating the metal and pouring the metal into the flasks. So that we can handle large capacity orders, we use large induction heaters to melt the metal for pouring.
Step Seven: Cutting the Cast Tree The result of the casting is a metal tree of your items. When the metal trees come out of casting they must be cleaned and prepared for cutting from the tree. Each cast item must be cut from the tree.
Step Eight: Desprueing Desprueing is the process of grinding the sprue off of the item so that evidence of the casting process is removed. We have a number of ways to despure items from rotary tools to grinding wheels. Because much of the metal from desprueing is unrecoverable and must be refined, desprueing is about 60% of the total cost of finishing or more if it is gold.
Step Nine: Finishing There are numerous ways in which your products can be finished such as; Hand polishing, tumble polishing, satin wheel finishing, sand blasting and the list goes on... Ace Castings provides Tumble finishing and Antiqueing services.
