Material selection of blow molds for hollow blow molding manufacturers


Author: MULAN -Plastic Molding Manufacturer

For hollow blow molding manufacturers, there are many types of materials to choose for blow molds, mainly including: cast iron, steel, stainless steel, aluminum, beryllium copper alloy, zinc, polymer materials and other materials. In actual use, polymer materials are generally used as test blow molds, and cast iron molds are generally used for manual hinged molds and small batch products, which are usually not used in mass production. If the hollow blow molding manufacturer has a large batch of blow molded products and a long production time, and considering that the mold incision requires high strength and hardness, it is better to use structural steel as the mold material. Although its heat transfer performance is not as good as that of aluminum alloy, zinc alloy material and beryllium copper alloy, the heat transfer condition can be effectively improved if a better structural design of the cooling channel is adopted. 1. Low carbon steel In the production of blow molds, low carbon steel materials are used to make molds. In particular, the use of low-carbon steel to make the cavity part and cooling water channel part of the mold has its unique advantages for the case where the equipment for processing the mold is poor. The welding performance of low carbon steel is better, which is conducive to welding processing. In the design of hollow blow molding manufacturers, due to the large volume of some large and super large blow molding molds, the cooling water channels that need to be processed are relatively deep and long, and it is difficult to form by drilling. Low carbon steel plates can be used for lamination welding The way to shape the cooling water channel, and even the mold cavity; for products that do not require too high mold precision, it can meet the relevant technical requirements. At the same time, due to the rapid development of computer design and manufacturing technology, in recent years, there has been rapid technological progress in mold lamination processing technology at home and abroad, and it is currently one of the development directions of blow mold processing technology. Blow molds processed with low carbon steel can also be treated with carburizing (nitriding) technology on the surface of the mold, and low carbon steel molds that have been used for a period of time can also be carburized (nitrided) Can prolong the service life of the mold. 2. Medium carbon steel or medium carbon alloy steel Medium carbon steel is also widely used in various blow molding molds. It is usually used directly to form mold cavities, mold bottom plates and other mold parts. For blow molding molds that can directly form cooling water channels by mechanical processing methods, medium carbon steel is suitable Or medium carbon alloy steel to directly produce. In recent years, for some large-scale hollow blow molding manufacturers, it is more common to use numerical control machining for large blow molding molds. Therefore, more and more molds are made of medium carbon steel and medium carbon alloy steel. 3. High carbon steel or high carbon alloy steel High carbon steel or high carbon alloy steel is usually used to make guide sleeves and guide posts of blow molds, as well as some special wear-resistant parts. The pictures and texts are only for learning and communication. For more information, please pay attention to Proficient Mold Proficient in moulds|blow molding products|hollow blow molding manufacturers|started in 1998, trustworthy.

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