模(mo)(mo)(mo)具(ju)(ju)是工(gong)(gong)(gong)(gong)業生產(chan)上用(yong)(yong)以(yi)注(zhu)塑(su)、吹塑(su)、擠出、壓(ya)(ya)鑄或(huo)(huo)鍛(duan)壓(ya)(ya)成(cheng)型(xing)(xing)、冶煉、沖(chong)(chong)壓(ya)(ya)等方法(fa)得到所(suo)需產(chan)品(pin)的(de)(de)各種模(mo)(mo)(mo)子和工(gong)(gong)(gong)(gong)具(ju)(ju)。簡(jian)而言之(zhi)(zhi)，模(mo)(mo)(mo)具(ju)(ju)是用(yong)(yong)來(lai)制(zhi)(zhi)作成(cheng)型(xing)(xing)物品(pin)的(de)(de)工(gong)(gong)(gong)(gong)具(ju)(ju)，這(zhe)種工(gong)(gong)(gong)(gong)具(ju)(ju)由(you)(you)各種零(ling)件構(gou)(gou)成(cheng)，不(bu)同的(de)(de)模(mo)(mo)(mo)具(ju)(ju)由(you)(you)不(bu)同的(de)(de)零(ling)件構(gou)(gou)成(cheng)。它(ta)主要(yao)通過所(suo)成(cheng)型(xing)(xing)材料(liao)物理狀態的(de)(de)改變來(lai)實(shi)現物品(pin)外(wai)形(xing)(xing)的(de)(de)加工(gong)(gong)(gong)(gong)。素有(you)(you)“工(gong)(gong)(gong)(gong)業之(zhi)(zhi)母”的(de)(de)稱(cheng)號。在外(wai)力(li)(li)作用(yong)(yong)下(xia)使(shi)(shi)坯(pi)(pi)料(liao)成(cheng)為有(you)(you)特(te)定形(xing)(xing)狀和尺(chi)寸(cun)的(de)(de)制(zhi)(zhi)件的(de)(de)工(gong)(gong)(gong)(gong)具(ju)(ju)。廣泛用(yong)(yong)于(yu)沖(chong)(chong)裁(cai)、模(mo)(mo)(mo)鍛(duan)、冷(leng)鐓、擠壓(ya)(ya)、粉末冶金件壓(ya)(ya)制(zhi)(zhi)、壓(ya)(ya)力(li)(li)鑄造(zao)，以(yi)及工(gong)(gong)(gong)(gong)程塑(su)料(liao)、橡膠(jiao)、陶瓷等制(zhi)(zhi)品(pin)的(de)(de)壓(ya)(ya)塑(su)或(huo)(huo)注(zhu)塑(su)的(de)(de)成(cheng)形(xing)(xing)加工(gong)(gong)(gong)(gong)中。模(mo)(mo)(mo)具(ju)(ju)具(ju)(ju)有(you)(you)特(te)定的(de)(de)輪廓或(huo)(huo)內腔形(xing)(xing)狀，應(ying)用(yong)(yong)具(ju)(ju)有(you)(you)刃口的(de)(de)輪廓形(xing)(xing)狀可以(yi)使(shi)(shi)坯(pi)(pi)料(liao)按(an)輪廓線形(xing)(xing)狀發(fa)生分離（沖(chong)(chong)裁(cai)）。應(ying)用(yong)(yong)內腔形(xing)(xing)狀可使(shi)(shi)坯(pi)(pi)料(liao)獲(huo)得相應(ying)的(de)(de)立(li)體形(xing)(xing)狀。模(mo)(mo)(mo)具(ju)(ju)一般(ban)包括動模(mo)(mo)(mo)和定模(mo)(mo)(mo)（或(huo)(huo)凸模(mo)(mo)(mo)和凹模(mo)(mo)(mo)）兩(liang)個(ge)部分，二(er)者可分可合。分開時取(qu)出制(zhi)(zhi)件，合攏時使(shi)(shi)坯(pi)(pi)料(liao)注(zhu)入(ru)模(mo)(mo)(mo)具(ju)(ju)型(xing)(xing)腔成(cheng)形(xing)(xing)。模(mo)(mo)(mo)具(ju)(ju)是工(gong)(gong)(gong)(gong)具(ju)(ju)，形(xing)(xing)狀復雜，承(cheng)受坯(pi)(pi)料(liao)的(de)(de)脹(zhang)力(li)(li)，對(dui)結(jie)構(gou)(gou)強度、剛度、表面硬度、表面粗(cu)糙度和加工(gong)(gong)(gong)(gong)精度都(dou)有(you)(you)較(jiao)高(gao)要(yao)求，模(mo)(mo)(mo)具(ju)(ju)生產(chan)的(de)(de)發(fa)展(zhan)水平是機械制(zhi)(zhi)造(zao)水平的(de)(de)重要(yao)標志(zhi)之(zhi)(zhi)一。

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