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The difference and connection between hot chamber die casting and cold chamber die casting

2022-10-08

Hot chamber and cold chamber die casting are two core forms of high-pressure die casting processes, widely applied in modern metal manufacturing. Although both molding principles are similar, their applicable materials, operating parameters and production efficiency differ greatly, guiding the selection of professional die casting machine and supporting die casting equipment for industrial production.

The most distinct difference lies in applicable melting temperature and metal types. Hot chamber die casting machinery works below 450°C, suitable for low-melting alloys such as zinc, lead and partial magnesium alloys. It adopts an integrated built-in furnace structure, enabling direct metal feeding with faster cycling speed, lower production cost and longer die service life. In contrast, cold chamber die casting adapts to high-temperature alloys above 600°C, including aluminum, copper and brass. Equipped with an external melting furnace, it relies on automatic or manual ladling for feeding, featuring higher molding precision and stronger adaptability for large castings.

As a professional die casting machine manufacturer, Bengbu Longhua provides full-series hot and cold chamber die casting solutions. Its cold chamber equipment covers 140T–2000T, supporting all-scale aluminum alloy casting projects, with upgraded technology cooperating with the Hefei Institute of CAS. The 60T–250T hot chamber die casting equipment is ideal for high-volume zinc alloy production.

The two processes have their own merits without absolute superiority. Hot chamber die casting excels in efficient and economical mass production, while cold chamber die casting dominates high-precision, high-strength and high-melting-point alloy molding. Longhua’s diversified die casting equipment portfolio precisely meets personalized production needs of global foundry enterprises.

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