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GREEN SAND, NOBAKE TOP PROCESSES 粘土湿砂、自硬砂工艺比例最大


Total Number of U.S. Plants 美国铸造企业总数


The total numbers for facilities using each process remained relatively stable compared to 2013. The biggest increase was six (diecasting) and the largest drop was 17 (gas hardened/colbox).


与2013年相比,采用各种工艺的企业数量保持相对稳定。压铸企业增长最快,增加了6 家;减少最多的是吹气硬化砂/冷芯盒企业,减少了17家。


Process


Leader: Green Sand/Horizontally Parted Last Place: V-Process Horizontally parted green sand molding is the peren-


nial favorite process, with 655 of the 1,692 facilities (or 38.7%) using it, a slight increase in facilities and percent- age compared to 2012. Its vertically parted counterpart, which often is used for higher volumes, is found in only 12.3% of facilities. T e nobake process comes in at a close second with 604 facilities, or 35.7%. Many facilities report using multiple processes. One


hundred twenty facilities use both the green sand and permanent mold processes (7.1%), and 433 facilities use the green sand and nobake processes (25.6%). Seven facili- ties reported using the V-process, a casting method with a vacuum holding unbonded sand in a mold during pouring.


工艺


第一位:粘土湿型砂/水平分型工艺 最后一位:V法


水平分型粘土湿型砂造型工艺是长期以来广为采用的 工艺,1692家铸造企业中占比38.7%的655家采用此工 艺,与2012年相比略有增加。与此相比,垂直分型工艺 一般用于大批量生产,只有12.3%的企业采用该工艺。 自硬砂工艺紧随粘土湿砂水平分型工艺排在第二位,共 有604家企业(35.7%)采用。


很多铸造企业采用多种工艺。120家企业(7.1%) 同时采用了粘土湿砂工艺和永久型工艺,433家企业 (25.6%)同时采用了湿砂工艺和自硬砂工艺。还有7 家企业采用V法工艺,V法工艺是一种使用真空保持形 态的无粘结砂的铸造工艺。


48 | FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION March 2015


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