Precise low-speed injection control is the core key to eliminating casting defects and stabilizing product quality in die casting production. Unreasonable velocity settings for die casting machine low-speed stage easily cause air entrapment, turbulence, cold shuts and poor forming, seriously restricting the yield and precision of aluminum alloy castings for traditional die casting equipment.
In actual production, excessive low-speed injection velocity drives massive air into the mold cavity and causes aluminum liquid surging in the pressure chamber, increasing liquid air content and triggering pores and sand holes. Conversely, overly low speed leads to cold insulation defects and incomplete filling. The optimal low-speed range is strictly controlled at 0.1-0.5 m/s, adopting uniform or uniformly accelerated injection to push molten metal gently. This stable flow avoids turbulence and gas dissolution, facilitates smooth cavity exhaust, and fundamentally reduces casting defects.
Traditional low-speed calculation formulas have obvious deviations from actual filling effects. Manufacturers mainly rely on manual experience and repeated debugging to set parameters, resulting in unstable die casting machinery process, massive trial-production waste and prolonged R&D cycles. To solve this industry pain point, Bengbu Longhua Die Casting Machine Co., Ltd., with 38 years of manufacturing experience, cooperates with the Hefei Institutes of Physical Science, CAS to develop upgraded production technology.
Longhua’s optimized intelligent process perfectly solves common defects such as pores and sand holes. It standardizes low-speed injection parameters, stabilizes continuous production quality of die casting machine, greatly improves casting precision and yield, and provides reliable, high-efficiency molding solutions for global aluminum die-casting manufacturers.
