Ductile Iron Sand Casting OEM Service

The mold is made concerning the drawings and according to the machining allowance required for subsequent machining. It is made of many kinds of materials, such as stainless steel, carbon steel, aluminum alloy, etc. To save costs, many factories will also use wood (if only a few dozen pieces are produced, this material is more cost-effective).

After the mold is made, we will soon produce several samples to test the material and various aspects of performance. This process is our simulation process for mass production. After the sample passes the test, the order will be completed according to this process. This can effectively improve the pass rate of orders and the overall quality of castings, shorten the order production cycle, and reduce costs.

After the samples pass the test, we will schedule production, purchase raw materials (costs will be saved when in large quantities, so the unit price of large-volume orders will be lower), and production (large-volume orders will also allow our production lines to run for a long time, saving labor and Time costs). Kindly contact our sales manager to update the price and increase the order quantity if you need to.

The sand core is usually prefabricated and put in when making the sand mold. There are two types of casting mold making: mechanical molding and manual molding. Engineers will choose a more appropriate method based on order volume. Both automatic molding and manual molding require vibrated sand packing. Kindly contact our sales manager to visit the factory. They will explain it to you in detail.

Box closing means buckling the upper and lower sandboxes together to form a cavity with a pouring port on the upper sandbox. The sand core needs to be placed in the designated location before packing. To prevent the sand from collapsing in the cavity when closing the box, the sand needs to be vibrated entirely when making the sandbox.

The process of ductile iron smelting is relatively complicated. During smelting, we add different reagents according to temperature and time. During the smelting process, pre-furnace inspection is required to ensure that the material meets the requirements. Our heating method is electromagnetic heating, which is more environmentally friendly. Kindly contact us to learn more about how your casting materials are smelted.

Adding a spheroidizing agent will lower the temperature of the molten iron, which makes rare earth and magnesium elements form slag inclusions in the firing ladle and pouring system. If these slag inclusions enter the mold cavity, they will cause casting defects such as inclusions, pinholes, and rough casting surfaces. Therefore, special attention is required when pouring. Skilled workers can reduce the occurrence of this situation to a greater extent.

After the pouring is completed, cooling and sand shakeout are carried out. When the sand shakeout is done, attention should be paid to the dust protection of employees, and dust removal equipment should be used to protect the environment. After the shakeout, the gate is cut and removed to obtain the cast slab. The cast slab is then shot-blasted to make the surface smoother.

Whether to perform heat treatment needs to be determined according to the mechanical property requirements of the casting. The performance of some castings is already up to standard when casting is completed. The primary function of heat treatment is to eliminate the internal stress of the casting, improve the internal structure of the casting, and enhance the mechanical properties. The cost of heat-treated castings will be higher.

The cast billet requires pass machining to adjust the surface roughness, tolerance, and shape according to requirements. The adjusted castings that are basically completed require pass surface treatment according to requirements. The surface treatment methods of ductile iron parts mainly include powder spraying, galvanizing, and passivation. If there is no surface treatment, it will be dipped in anti-rust oil for simple anti-rust treatment.

There are many ways to package, and I won’t go into details here. We provide customization services for the appearance of packaging materials. Kindly contact our sales manager to learn more.

We support DDP, DDU, DES, DEQ, EXW, and other delivery methods and can ship worldwide. We have professional freight consulting services to help you find a better freight company for free. After completed delivery, we also have an after-sales service to provide excellent support.