Research On Squeeze Casting Quantitative Dosing And Pouring Device Of Aluminum Alloy

In china a large amount of general-purpose hydraulic presses are used as squeezecasting machine currently. As characteristic of general-purpose hydraulic press insqueeze casting experiment people often use manual mold casting by some simple wayssuch as experience or meter ladle, which can’t achieve quantitatively pouring and needlarger labor intensity. The products can’t guarantee for dimension accuracy and theproduction efficiency is low and the products are not fit for mass mechanizationproduction. There is easy to volume gas and oxidize, and there is not easy to achievenear net shape squeeze casting forming.To solve this problem, in order to improve the general-purpose hydraulic press tosqueeze casting forming production efficiency and the quality of the parts, in this papera quantitative dosing and pouring device of aluminum alloy based on general-purposehydraulic press was designed and manufactured. This device was only needed to set outa gating system connecting squeeze casting mold with the squeeze casting quantitativedosing and pouring device without any improvement of general-purpose hydraulic press.The squeeze casting quantitative dosing and pouring device of aluminum alloy used lowpressure transport metal smelting aluminum alloy to the die-casting-style pipeline, andthen used PLC control programs control the hydraulic piston in order to achieve thequantitative dosing and pouring the molten aluminum alloy process. By using thebottom note type pouring way, molten aluminum alloy could be sent to the liquid metalmold cavity and the whole process of the filling liquid surface smoothly rise. There wasnot easy to produce natural convection, and to volume gas through the closed modules,so as to improve the squeeze casting products quality and production efficiency andreduce the cost of reform. This device could promote squeeze casting technology in thepractical application.In order to use squeeze casting quantitative dosing and pouring device ofaluminum alloy to dose and pour2024aluminum alloy end caps quantitatively, firstlythe theoretical calculation of the design data were used to get the main operationparameters: hydraulic pressure15.5KPa, pressure rate1.29KPa/s, filling liquid speedthat passive punch pushed molten metal0.01m/s, injection filling mould speed thatactive punch pushed molten metal0.03m/s, and then ProCAST numerical simulationsoftware was used to simulate the changes of the filling temperature and the flow ofliquid metal status of different injection speed. After the other injection speeds, the bestinjection filling velocity was0.03m/s.Firstly, the device was installed and tested; then water is used to simulate and testthe reliability of the equipment; lastly, quantitative transmission of2024aluminum alloy casting trials was conducted, based on the best processing and equipment operatingparameters obtained by theory and numerical simulation. The results showed that: thequantitative transmission in the forming process of aluminum alloy squeeze castingcould be achieved, by combining the equipment with general-purpose hydraulic press.Furthermore, if the device structure and materials could be further perfected, the devicehas broad application prospects and could improve the further development of squeezecasting technology.