负压干砂实型铸造20t大型铸件

韩焕卿; 李增民; 肖占德

doi:10.15980/j.tzzz.2012.11.021

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负压干砂实型铸造20t大型铸件
Production of Large Automobile Mould with 20 Tons by Full Mold Casting with Negative Pressure and Sand
2012年32卷第11期页码：1043-1045
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.11.021

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[1]韩焕卿,李增民,肖占德.负压干砂实型铸造20t大型铸件[J].特种铸造及有色合金,2012,32(11):1043-1045.

Han Huanqing1, Li Zengmin2, Xiao Zhande4. Production of Large Automobile Mould with 20 Tons by Full Mold Casting with Negative Pressure and Sand[J]. Special Casting & Nonferrous Alloys, 2012,32(11):1043-1045.
[1]韩焕卿,李增民,肖占德.负压干砂实型铸造20t大型铸件[J].特种铸造及有色合金,2012,32(11):1043-1045. DOI： 10.15980/j.tzzz.2012.11.021.

Han Huanqing1, Li Zengmin2, Xiao Zhande4. Production of Large Automobile Mould with 20 Tons by Full Mold Casting with Negative Pressure and Sand[J]. Special Casting & Nonferrous Alloys, 2012,32(11):1043-1045. DOI： 10.15980/j.tzzz.2012.11.021.

摘要

采用消失模铸造生产了单件质量为20t的汽车模具铸件

其轮廓尺寸为4540mm×2400mm×800mm

材质为HT300;采用密度为17.5kg/m3的EPS模样

模样质量为44.6kg

型砂采用粒度为10/20目的普通石英砂;采用流涂工艺涂刷3遍水基涂料

在烘干室干燥8～9h

涂层厚度控制在1.5～2.0mm;采用雨淋式加砂和人工辅助加砂相结合

负压度平均为0.05MPa

负压作用时间为25min;采用中频无芯感应电炉熔炼

浇注温度为1370～1400℃

浇注系统采用底注加侧注

浇注时间为3min

箱内保温时间约85h。

Abstract

HT300 automobile mould with 20 tons and 4540 mm in length and 2400 mm in width

800 mm in height was produced by full mold casting. EPS pattern with 17.5kg/m3 in density and 44.6 kg in net weight was adopted. Common quartz sand with 10/20 mesh was used. And then

three layers water-based coatings with coating thickness of 1.5

mm were sprayed by flow-coating ways

and the pattern was dried at drying chamber for 8

hours. Shower sand-adding combining with man sand-adding was used with negative pressure of 0.05 MPa for 25 min. Medium frequency coreless furnace was adopted to melt iron

and it was poured with bottom pouring integrated with side-pouring at 1 370

400 ℃ for 3 min. Finally

the dwelling time in the box was approximately 85 hours.