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Disadvantages of investment casting

1. Compared to other metal casting methods, investment casting involves many complicated steps, making the process relatively expensive. But for some products, certain steps can be automated. It may be more expensive than die casting or sand casting, but the unit cost will decrease as production increases.

2. High-cost molds to make models have traditionally limited mass production of investment casting

3. The high cost is also due to professional equipment requirements, expensive refractory materials, and high labor costs

4. Parts requiring cores are difficult to cast, with holes smaller than 1.6 mm or depths greater than 1.5 times the diameter

Over the centuries, various combinations of raw materials have been developed to produce various metal types. Some cast products are used in engines requiring high resistance to heat and cold. Cast iron pipes must be resistant to corrosion and high pressure. Other castings must be lightweight but durable. In many applications, parts are designed to allow precise tolerances between expansion and contraction.

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Other casting processes include gypsum casting, die casting and investment casting. Gypsum casting simply replaces sand with a plaster mold.

Die casting requires two large, moving non-ferrous metal parts that are clamped together under high pressure. Molten metal is injected into the mold, and the metal parts are separated after hardening.

The process of investment casting begins by filling the mold with wax. Once the wax hardens, it coats the ceramic material multiple times. Heat it until the wax melts and retains the ceramic mold. The mold is filled with molten metal, cooled, and the ceramic material is broken off. 

Metal casting is a modern craft with ancient roots. In the metal casting process, metal shapes are formed by pouring molten metal into a mold cavity, cooling it in the mold cavity, and then removing it from the mold. Metal casting can be said to be the earliest and most influential industrial process in history. It was once used to make many of the metal objects we use in our daily lives: car parts, train wheels, lamp posts, school bus pedals, and more. Additionally, metal foundries rely on metal recycling as a cost-effective source of raw materials, significantly reducing scrap metal that could end up in landfills.

Metal casting can be said to be the earliest and most influential industrial process in history. It was once used to make many of the metal objects we use in our daily lives: car parts, train wheels, lamp posts, school bus pedals, and more.