Share the application of moulding machinery

The mould has 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, i.e. to be blanked. The application of the cavity shape allows the blank to be given a corresponding three-dimensional shape. The die is generally divided into two parts: the moving die and the fixed die, or the convex die and the concave die. They can be divided or closed. When they are separated, they are used to load the blank or to remove the part, and when they are closed, they are used to separate the part from the blank or to form it. In blanking, forming stamping, die forging, cold heading, pressing and compression moulding, the external forces required for separation or forming are applied to the blank by means of a die.

In die extrusion, die casting and injection moulding, the external force is then applied to the blank by air pressure, plungers, punches, etc. The die is subjected to the expansion force of the blank. In addition to the mould itself, it also requires die holders, die frames, guides and part ejectors, etc. These parts are generally made into general-purpose types, suitable for a certain range of different moulds. High precision, accurate dimensions, the gap between convex and concave die of some stamping dies is close to 0; fast stamping speed, tens to thousands of times per minute; long die life, the life of some silicon steel stamping dies is more than several million times.

In the stamping process, the blank is continuously stamped and shaped through multiple stations to the final station, which is called a progressive die, also known as a continuous die. The existing 20-station, 30-station progressive die, from the coil material unrolling, leveling, stamping, until the parts will be discharged and stacked, has been fully automated, productivity has been greatly improved. It is a 6-station progressive die for stator and rotor silicon steel sheet punching. The first station punches two pin holes, two shaft holes and two key slots each, the second station punches the rotor shaft holes and 22 rotor slot holes, the third station punches 24 stator slot holes, the fourth station drops the rotor piece, the fifth station is empty, the sixth station drops the stator piece and the scrap is cut off.

The moulds have several forms of complex cavities, and the working conditions are harsh, with the steel blazing red above 1000°C deforming and flowing in the mould cavities, the moulds have to withstand the high speed impact of the forging hammers or the pressure of heavy loads, and are often in a state of rapid cooling, rapid heating and alternating hot and cold during use. Die material should have high strength, toughness and wear resistance, hot forging must also have a high temperature strength and hardness, and after strong toughening heat treatment.

Moulds are used in an extremely wide range of applications. Mass production of mechanical and electrical products, such as automobiles, bicycles, sewing machines, cameras, motors, electrical appliances, instruments, etc., as well as the manufacture of daily-use appliances are applied to a large number of moulds. The moulds are basically produced in single pieces with complex shapes and high requirements for structural strength, rigidity, surface hardness, surface roughness and machining accuracy, so mould production requires a high level of technology. The timely supply of moulds and their quality directly affect the quality of products, costs and the development of new products. The level of development of mould production is one of the important signs of the level of machinery manufacturing.

Mould machinery is a tool used to shape objects, this tool has various parts, different moulds are made up of different parts. It is mainly through the physical state of the formed material changes to achieve the processing of the shape of the goods. In punching, forming stamping, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, as well as engineering plastics, rubber, ceramics and other products in the forming process of compression or injection moulding, used under the action of external force to make the blank into a specific shape and size of the parts of the tool.