Pressure Die A mold is a Pressure Die for producing plastic mold products. It consists of several sets of parts with a molded cavity. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity, and is cooled and shaped...
A mold is a Pressure Die for producing plastic mold products. It consists of several sets of parts with a molded cavity. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity, and is cooled and shaped in the cavity, and then the upper and lower molds are separated, and the product is ejected from the cavity through the ejection system to leave the mold, and finally the mold is closed. For the next injection, the entire injection molding process is cyclic.
The tools and products we use in daily production and life range from the base of the machine tool to the outer casing of the machine, to a small screw, button and shell of various household appliances, all of which have a close relationship with the mold. The shape of the mold determines the shape of these products, and the quality and precision of the mold determines the quality of these products. Because of the different materials, appearance, specifications and uses of various products, the mold is divided into casting molds, forging dies, die-casting dies, stamping dies and other non-plastic molds, as well as plastic molds.
General definition of mold: In industrial production, various types of presses and special tools mounted on the press are used to produce metal or non-metal materials by pressure to produce parts or articles of the desired shape. This special tool is collectively referred to as a mold; General classification: can be divided into plastic molds and non-plastic molds.
The part includes two basic T-sequences for blanking and punching, and the following three process schemes can be used:
1. First blanking, then punching, using a single T process mold production.
2. Blanking-punching composite stamping, using composite mold production.
3. Punching and blanking are continuously stamped and produced by continuous die.
The structure of the stamping die, the structure of the die, the die structure is similar, the corresponding die is designed according to different product characteristics and requirements, the different die structure, its function is also different, the products produced are different, in general, it is simple , there are complex ones. But no matter how complicated the structure is, its basic structure is unchanged, nothing more than a number of templates, blocks and standard parts.
When selecting the material of the stamping part, not only the performance of the product but also the stamping process and subsequent process performance requirements should be considered. The basic requirements for stamping processing are as follows:
1, with good stamping performance
For the forming process, such as stretching, bending, stepping, convex hull, etc., the material should have good stamping and forming properties, that is, it should have good crack resistance, good moldability and shape, otherwise the product is prone to deformation. , rupture, etc., causing difficulties in repairing the mold. For the separation process, the material is required to have a certain plasticity.
2, with a high surface quality
The surface of the material should be smooth and flat without damage. The material with good surface quality is not easy to be broken during molding, and it is not easy to scratch the mold, and the surface quality of the workpiece is also good.
3. The thickness tolerance of the material should conform to the national standard.
Because a certain mold gap is only suitable for materials with a certain thickness range, if the material thickness tolerance is too large; not only directly affects the quality of the workpiece, but also may lead to the appearance of waste. In the process of correcting bending, shaping, etc., there is a possibility that the mold or the press is damaged due to excessive thickness deviation.