What is a mould?

Mould (mú jù), a variety of moulds and tools used in industrial production to obtain the desired product by injection moulding, blow moulding, extrusion, die-casting or forging forming, smelting, stamping, etc. In short, a mould is a tool used to produce a moulded item, and this tool is made up of various parts, different moulds being made up of different parts. It is mainly used to process the shape of an object by changing the physical state of the material being moulded. It is known as the "mother of industry".

It is a tool for turning a blank into a part of a specific shape and size under the action of an external force. They are widely used in punching, die-forging, cold heading, extrusion, powder metallurgical parts pressing, pressure casting, as well as in the forming of engineering plastics, rubber, ceramics and other products by compression or injection moulding. Moulds have a specific contour or internal cavity shape. The application of the contour shape with an edge allows the blank to be separated according to the contour line shape (blanking). The application of the cavity shape allows the blank to be given a corresponding three-dimensional shape. The mould generally consists of two parts, the moving die and the fixed die (or convex and concave die), which can be separated or combined. When separated, the part is removed and when closed, the blank is injected into the mould cavity and shaped. Mould is a precision tool, complex shape, bearing the expansion of the blank, structural strength, rigidity, surface hardness, surface roughness and processing accuracy have high requirements, mould production level of development is one of the important signs of the level of machinery manufacturing.