Call Us: +86 155 1075 8257

[email protected]

Mon - Fri 09:00 - 18:00

Sat - Sun 10:00 - 16:00

Blog
Sand Casting Manufacturers

Sand Casting Manufacturers

Sand casting is one of the oldest methods of metal fabrication and is still in use today. The process involves molding a sand mold of the desired shape and pouring molten metal into the mold. Once cooled, the sand mold is broken away to reveal a cast, which can then be machined and finished to the desired shape. The process dates back as far as 3000 BC, and we still use this process because of its low tooling costs and simplicity. Sand casting is one of the most primitive methods of metal production. Sand casting is a great deal we offer to our valued customers because it’s a simple, cost-effective, and environmentally friendly way of producing castings.

Components of a Sand Casting Mold

Sand casting is a method used to make objects from various materials. Sand casting produces a finished product that is durable, strong, and minimizes waste; it’s perfect for making precision parts. 

The components of a sand casting mold are a mixture of materials that includes silica sand, clay, and an aggregate such as sand, gravel, or crushed rock. The clay mixture solidifies in the mold, and the mixture’s properties affect the finished product. To make a sand casting mold, we start by mixing the silica sand and clay and then add the aggregate. The components are mixed by hand, and the mixture is placed in a molding box. The mixture is cured before being poured into the mold. 

Methods of Making Sand Castings

Bedding-in Method

Bedding-in or bedding-down is a method of casting sand in molds. It is normally used as an intermediate step in making larger sand molds and is especially useful when making multiple castings of the same sand mold. The sand molding process begins with making a sand mold, during which the sand is filled in the mold until the cavity is full. At this point, the mold is considered “bedded” or “bedded-down.” Then, the cavity of the sand mold is drained to remove the excess sand. Now, the cavity is filled with a foundry alloy, which is heated to form the molten metal. After the alloy cools, the casting can be removed, and the process is repeated to make multiple castings of sand molds.

False Cope Method

The false cope method is a method of making sand castings in which all the mold cavity is gradually filled with sand, which does not even touch the surface of the mold, rather than pouring sand completely into the mold cavity. This method was used as early as the 18th century. The false cope method is an adaptation of the lost-wax method, in which wax is poured into the mold cavity, and the shell is pressed against the wax. 

Flat Back Method

The flat Back Method of Sand Casting is called the Bulk Molding Process. This is a method of casting in the sand which is free from any mechanical aid. In this process, gating or vents are eliminated. The mold is filled with sand of the required density. Once casting is filled, plaster of Paris is poured over the sand mold. The plaster of Paris is allowed to harden. The sand mold is cut off, and the shell is opened to produce the required casting.

Types of Casting Sand

There are different types of casting sand that is used for our casting purposes. The sand should be suitable for casting in metal alloys. The sand should be of fine quality, free from abrasive particles, and free from rust,, dust, and clay. If you need any sand casting service , we are the best sand casting manufacturers!