In the investment casting industry, steel castings are the most used castings in the manufacturing industry, and are widely used in equipment, agricultural machinery, machining, and automobile industries. Metal castings can produce parts with complex shapes, but there are also requirements for the design of the product structure. In the case of meeting the requirements of use, it should also try to comply with the casting process. For example, in the structural design, care should be taken not to have thin walls, which may easily lead to dissatisfaction with pouring or product deformation; for example, try not to have sharp corners, try to use radian transitions; and try not to appear small and deep blind holes, It will cause great trouble for foundry sand cleaning. Of course, there are many other structural problems. We will improve and optimize the product structure according to the customer's drawings without changing the customer's functional use, so as to maximize the product qualification rate and production efficiency. In some cases where the structure cannot be changed, we will also perform some follow-up processing after casting according to actual problems, so that the expected results can also be achieved.
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Cold heading is a kind of production process relative to enthalpy. It is characterized by high precision, high efficiency, high quality, and low consumption. The cold heading machine is used to produce all kinds of standard parts, fasteners and special-shaped workpieces. With this machine, the steel is directly heated in the cold heading machine without heating, and it will “spitting†the screws and bolts. Firmware and shaped parts.
In the past, domestic cold heading machines generally produced fasteners such as screws and bolts with a diameter of 30 mm or less. This large-scale machine weighing nearly 200 tons broke through this limitation and can produce fasteners and shaped parts such as bolts with a diameter of 30-34mm, and it can be cold-formed once. According to statistics from relevant departments, the total global demand for fasteners has increased by an average of 5% annually. In the coming years, the demand for fasteners will continue to grow at a rate of 12.5% ​​per year in China. The advent of large precision environmental protection automatic cold forming equipment will increase the competitiveness of China's fastener industry. 
Ningbo develops new cold heading machine fasteners cost reduction
While the steel enters, the other screw, bolt, and other fasteners “spit†out, which is the charm of the cold heading machine. Recently, a large-scale precision environment-friendly automatic large-scale cold heading machine was successfully developed and went offline at Ningbo Sijin Machinery Co., Ltd., located in Ningbo High-tech Zone, and announced the breakthrough in the production of fasteners such as screws and bolts. Manufacturing costs will be greatly reduced.
Related news: Fastener industry