1、(?)将(Jiang)原(Yuan)来(Lai)在(Zai)型(Xing)砂(Sha)中(Zhong)加(Jia)入(Ru)一(Yi)定(Ding)比(Bi)例(Li)树(Shu)脂(Zhi)等(Deng)凝(Ning)固(Gu)剂(Ji)，(?)混(Hun)砂(Sha)填(Tian)充(Chong)砂(Sha)箱(Xiang)（(?)我(Wo)们(Men)一(Yi)般(Ban)称(Cheng)为(Wei)自(Zi)硬(Ying)树(Shu)脂(Zhi)砂(Sha)造(Zao)型(Xing)）(?)改(Gai)为(Wei)直(Zhi)接(Jie)使(Shi)用(Yong)干(Gan)砂(Sha)，(?)通(Tong)过(Guo)大(Da)型(Xing)振(Zhen)动(Dong)台(Tai)振(Zhen)动(Dong)后(Hou)抽(Chou)负(Fu)压(Ya)造(Zao)型(Xing)（(?)称(Cheng)干(Gan)砂(Sha)负(Fu)压(Ya)造(Zao)型(Xing)）(?)，(?)其(Qi)优(You)点(Dian)是(Shi)大(Da)大(Da)提(Ti)高(Gao)了(Liao)模(Mo)型(Xing)精(Jing)度(Du)，(?)减(Jian)少(Shao)了(Liao)树(Shu)脂(Zhi)等(Deng)其(Qi)它(Ta)化(Hua)学(Xue)物(Wu)质(Zhi)对(Dui)操(Cao)作(Zuo)工(Gong)和(He)生(Sheng)产(Chan)环(Huan)境(Jing)的(De)污(Wu)染(Ran)，(?)降(Jiang)低(Di)了(Liao)工(Gong)人(Ren)劳(Lao)动(Dong)强(Qiang)度(Du)。(?)

 

          2、(?)我(Wo)公(Gong)司(Si)采(Cai)用(Yong)电(Dian)炉(Lu)进(Jin)行(Xing)熔(Rong)炼(Lian)，(?)替(Ti)代(Dai)冲(Chong)天(Tian)炉(Lu)，(?)保(Bao)证(Zheng)了(Liao)铸(Zhu)件(Jian)的(De)材(Cai)质(Zhi)要(Yao)求(Qiu)的(De)稳(Wen)定(Ding)和(He)浇(Jiao)注(Zhu)温(Wen)度(Du)，(?)解(Jie)决(Jue)了(Liao)冲(Chong)天(Tian)炉(Lu)炉(Lu)前(Qian)配(Pei)料(Liao)和(He)焦(Jiao)碳(Tan)质(Zhi)量(Liang)的(De)影(Ying)响(Xiang)，(?)浇(Jiao)注(Zhu)温(Wen)度(Du)上(Shang)不(Bu)去(Qu)，(?)铸(Zhu)件(Jian)材(Cai)质(Zhi)不(Bu)稳(Wen)定(Ding)的(De)缺(Que)点(Dian)。(?)

 

          3、(?)使(Shi)用(Yong)该(Gai)技(Ji)术(Shu)，(?)在(Zai)浇(Jiao)注(Zhu)过(Guo)程(Cheng)中(Zhong)逐(Zhu)渐(Jian)抽(Chou)压(Ya)，(?)使(Shi)铸(Zhu)件(Jian)在(Zai)浇(Jiao)注(Zhu)过(Guo)程(Cheng)中(Zhong)产(Chan)生(Sheng)的(De)一(Yi)些(Xie)废(Fei)弃(Qi)物(Wu)直(Zhi)接(Jie)抽(Chou)入(Ru)到(Dao)处(Chu)理(Li)罐(Guan)中(Zhong)，(?)减(Jian)少(Shao)了(Liao)铸(Zhu)件(Jian)中(Zhong)气(Qi)体(Ti)及(Ji)残(Can)留(Liu)物(Wu)的(De)存(Cun)在(Zai)。(?)