CM International’s custom metal casting services include die casting, sand casting, investment casting, and other processes. Our resources allow us to offer customers high-quality products at competitive costs. Our parts size range from 25mm to 750 mm (1” to 30”), and are made to fit your specifications. Quick, reliable service is our priority. We offer a 12 week lead time for large order; and as a full-service manufacturer, we can provide complete logistics support, warehousing in the USA, inventory programs, feasibility analysis and other quality assurance programs. When necessary, we assist customers with light sorting and assembly needs. Plating and heating treatments are also a part of our value-added services.
We process a variety of metals and materials to meet customer needs and specifications:
CM International produces die casted parts from 1”-30” in size (12mm-750mm) and works with many materials. We offer a 12 week lead time for large orders and our tolerances are always to customer specifications based on the size of the part, with general tolerance per ISO 2768 /ASME Y14.5-2009.
Machining: Conventional Milling and Turning; CNC Machining and Turning.
Plating: Zinc Plating, Chrome Plating, Tin Plating, Nickel Plating, E-coating, Black Oxide, Anodize, etc.
Heat Treatments: Annealing, Normalizing, Tempering, Quenching, Induction Harding etc.
Die casting offers many advantages over other manufacturing techniques. It is one of the most efficient methods for producing a range of components because it allows for mass production of complex, identical shapes in a very short amount of time. The components produced by die casting are also stronger and more durable than those produced by other methods. These are just a few of the advantages of die casting components for the automotive, hydraulic, railway, electronic, marine, commercial and mining industries.
The die casting process works by injecting liquid metal under high pressure into a precision mold cavity. Typically, the mold cavity has been previously machined with hardened tool steel. Once the molten liquid solidifies within the die cavity, the cavity is removed and the casting is ejected. This process enables manufacturers to produce small, intricate shapes with smooth or textured surfaces quickly and accurately. Housings pumps, brackets, adapters and handles are some of our most common die casting components.
CM International's sand casting capabilities serve almost any industrial or commercial application. Most commonly, we work with the automative, hydraulic, railway, electronic, commercial, marine, and mining industries. Our part size capabilities range from 25mm to 750mm (1* to 30*), and are made to fit your specifications based on the size of the part, with general tolerance per ISO 2768 /ASME Y14.5-2009.
Machining: Conventional Milling and Turning; CNC Machining and Turning.
Plating: Zinc Plating, Chrome Plating, Tin Plating, Nickel Plating, E-coating, Black Oxide, Anodize, etc.
Heat Treatments: Annealing, Normalizing, Tempering, Quenching, Induction Harding etc.
Sand casting is relatively low in cost and has a low cost for tooling as well. And also it can be applied to both large and small parts, so it offers design flexibility. Because of this, it is often used to fabricate complicated parts, such as those with complex interior chambers. In addition, sand casting has the capability to work with many types of metal, both ferrous and non-ferous.
The sand casting process begins by placing feeds and risers to either the top or bottom pattern. Sand boxes are then placed around the patterns and filled with casting sand, which is then compacted. The boxes are flipped upside down so that the patterns can be removed, and the feed sand boxes are placed on top of one another. Molten metal is poured into the feed hole, and once the metal is solidified and cooled, the top sand box is removed, revealing the newly sand casted metal part. Once the feeds are removed from the part, cleaning and grinding occur until the desired finish is reached.
CM International manufactures gravity casted parts for a wide range of industries, including, but not limited to, automotive, hydraulic, railway, electronic, and commercial. Common parts we manufacture with the gravity casting process include engine housing, brackets, cooling systems and large utility equipment. Our part size capabilities range from 25mm to 750 mm (1” to 30”). We offer general tolerance per ISO 2768 /ASME Y14.5-2009 and are headquartered in Chicago with manufacturing facilities in China.
Machining: Conventional Milling and Turning; CNC Machining and Turning.
Plating: Zinc Plating, Chrome Plating, Tin Plating, Nickel Plating, E-coating, Black Oxide, Anodize, etc.
Heat Treatments: Annealing, Normalizing, Tempering, Quenching, Induction Harding etc.
Gravity casting uses steel and graphite molds to create simple, yet durable metal components. One advantage of gravity casting over other casting processes is that the mold used to create the parts is permanent. These high-quality molds, most often made of steel, can be used over and over to produce the same part. This makes the product quality consistent and allows for faster production times. Gravity casted metal parts also offer good dimensional accuracy and tend to have smoother surfaces than sand casting parts.
Gravity casting also known as permanent mold casting, gravity casting begins with two sides of a steel mold that are made to fit together precisely, while also opening and closing easily. These steel molds are used over and over to create many metal parts. Prior to pouring the molten metal, the molds are coated with a refractory spray that allows the mold to retain its strength in high temperatures. The molds are then placed together and a feed or upriser is inserted. Molten metal is poured through the feed into the gravity casting tool. Once the metal part solidifies, the mold is opened and the casted part is removed. Once the feeds are removed, the part is cleaned and finished to the customer’s specifications.
CM International produces investment casting parts from 1”-30” (12mm-750mm) in size, and works with many materials, including stainless steel, aluminum, carbon steel, iron, and zinc. We offer a 12 week lead time for large orders and our tolerances are always to customer specifications based on the size of the part, with general tolerance per ISO 2768 /ASME Y14.5-2009.
CM International offers precision investment casting OEM parts to our customers. Our investment casting parts are used in many industries: aerospace, food production, medical, military, and more.
Intricate shapes with thin-wall castings can be achieved with lost-wax casting. To produce a complex component, wax patterns are created to make an exact replica of the desired metal part. Assembly room temperature and humidity are closely monitored during this process to ensure the wax pattern retains dimensional stability. The wax assemblies are then processed to become a ceramic shell mold. The assemblies are dipped into a cleaning bath before being placed into a bath of slurry. If there are any bubbles, they are burst to ensure a smooth finish. Next, the assemblies are placed in a rainfall sander and every detail is covered in a sand coating. Additional coats of material are applied until desired shell thickness is achieved. Using high heat, we then remove the wax, leaving the shell available for molten metal. The metal is poured into the shells and allowed to cool. Once the metal is cooled, the shell is removed by vibrating or high pressure water jets. Using a high speed cutting wheel, the individual parts are then removed from the assembly and cleaned, finished, and tested.
Lost foam casting is similar to lost wax casting, except an evaporable foam is used in place of wax. The first step in this process is to machine the foam into the shape of the final metal part, meeting all of the required specifications. Then, the surface of the foam part is covered with a refractory coating. This creates a barrier between the foam and the sand. Feed and upriser components are added to the part later fill with molten metal. The foam part is then placed in a mold, filled with casting sand, and then compacted. As the molten metal is poured through the feed, the metal burns away all of the foam, leaving the same shape in metal. Once cooled, the metal casting is removed from the sand mold. The metal part is then cleaned, finished and tested to ensure it meets specifications.
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