Classification and composition of molds
Date:2021-12-30 15:12:33 Thursday
Summary:Molds, various molds and tools used in industrial production to obtain desired products by methods such as injection molding, blow molding, extrusion, die-casting or forging molding, smelting, and stamping. In short, a mold is a tool used to make mol......
Molds, various molds and tools used in industrial production to obtain desired products by methods such as injection molding, blow molding, extrusion, die-casting or forging molding, smelting, and stamping. In short, a mold is a tool used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article through the change of the physical state of the formed material. Known as the "Mother of Industry".
Under the action of external force, the blank becomes a tool with a specific shape and size. It is widely used in punching, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and compression molding or injection molding of engineering plastics, rubber, ceramics and other products. The mold has a specific contour or cavity shape, and the contour shape with a cutting edge can be used to separate the blank according to the contour shape (punching). The shape of the inner cavity can be used to obtain the corresponding three-dimensional shape of the blank. The mold generally includes two parts: a movable mold and a fixed mold (or a convex mold and a concave mold), which can be separated or combined. The parts are taken out when they are separated, and the blanks are injected into the mold cavity to form when they are closed. The mold is a precision tool with a complex shape and can withstand the expansion force of the blank. It has high requirements for structural strength, rigidity, surface hardness, surface roughness and processing accuracy. The development level of mold production is one of the important signs of the level of mechanical manufacturing.
Many types of molds
According to the processing object and processing technology, it can be divided into:
① Die for processing metal.
② Processing non-metal and powder metallurgy molds. Including plastic molds (such as two-color molds, compression molds and extrusion molds, etc.), rubber molds and powder metallurgy molds. According to the structural characteristics, the mold can be divided into a flat punching mold and a cavity mold with space. Molds are generally single-piece, small batch production.
According to the different molding materials
Hardware molds, plastic molds, and their special molds.
Hardware molds are divided into: including stamping molds (such as punching molds, bending molds, deep drawing molds, turning molds, shrinkage molds, undulating molds, bulging molds, plastic molds, etc.), forging molds (such as forging molds, upsetting molds, etc.) Forging dies, etc.), extrusion dies, extrusion dies, die-casting dies, forging dies, etc.;
Non-metallic molds are divided into: plastic molds, inorganic non-metallic molds, sand molds, vacuum molds, and paraffin wax molds.
Among them, with the rapid development of polymer plastics, plastic molds are closely related to people's lives. Plastic molds can generally be divided into: injection molding molds, extrusion molding molds, gas-assisted molding molds and so on.
In addition to the mold itself, it also needs a mold base, a mold base, and a mold core leading to the ejection device of the part. These parts are generally made of general-purpose type. Mold companies need to be bigger and more refined. They must determine product positioning and market positioning based on market demand, technology, capital, equipment and other conditions. These practices are especially worthy of learning and reference by small mold companies, and focus on gradually forming their own technical advantages and products. Advantage. Therefore, my country's mold companies must actively strive to learn from the experience of these advanced foreign companies for better development in the future.