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Cope and drag with cores in place on the drag Two sets of castings (bronze and aluminium) from the above sand mold. In foundry work, the terms cope and drag refer respectively to the top and bottom parts of a two-part casting flask, used in sand casting. The flask is a wood or metal frame, which contains the molding sand, providing support to ...
A similar technique called a cope and drag pattern is often used for large castings or large production runs: in this variation, the two sides of the pattern are mounted on separate pattern plates that can be hooked up to horizontal or vertical machines and moulded with the molding material.
The cope and drag (top and bottom halves, respectively) of a sand mold, with cores in place on the drag. Two sets of castings (bronze and aluminium) from the above sand mold. Sand casting , also known as sand molded casting , is a metal casting process characterized by using sand —known as casting sand —as the mold material.
The shape of a flask may be square, rectangular, round or any convenient shape. A flask can have any size so long as it is larger than the pattern being used to make the sand mold. Flasks are commonly made of steel, aluminum or even wood. A simple flask has two parts: the cope and the drag. More elaborate flasks may have three or even four parts.
Produce wax patterns: Although called wax patterns, pattern materials may also include plastic and frozen mercury. [6] Wax patterns can be produced in one of two ways. In one process, the wax is poured into the mould and swished around until an even coating, usually about 3 mm (0.12 in) thick, covers the inner surface of the mould.
A bronze casting showing the sprue and risers. A riser, also known as a feeder, [1] is a reservoir built into a metal casting mold to prevent cavities due to shrinkage.Most metals are less dense as a liquid than as a solid so castings shrink upon cooling, which can leave a void at the last point to solidify.
Cope and stick construction is a frame and panel joinery technique often used in the making of doors, wainscoting, and other decorative features for cabinets, furniture, and homes. [ 1 ] [ 2 ] In cope and stick construction, the "stick" is the molded edge with a cut along the inside of the frame where it is to be joined to the panel.
Joining tubular members in metalworking is also referred to as a cope, or sometimes a "fish mouth joint" or saddle joint. [1] Most English-speaking countries outside the United States use the terms scribe and scribing. Coping is commonly used in the fitting of skirting and other mouldings in a room. It allows for clean joints between ...