模具(ju)(ju)(ju)(ju)(ju)是工(gong)(gong)業(ye)生(sheng)產(chan)(chan)(chan)上用(yong)(yong)以注塑(su)、吹塑(su)、擠出、壓(ya)(ya)鑄或(huo)鍛壓(ya)(ya)成(cheng)型、冶煉、沖壓(ya)(ya)等方(fang)法(fa)得到所需產(chan)(chan)(chan)品(pin)(pin)的(de)各種(zhong)模子和工(gong)(gong)具(ju)(ju)(ju)(ju)(ju)。簡而言(yan)之(zhi)(zhi)，模具(ju)(ju)(ju)(ju)(ju)是用(yong)(yong)來制(zhi)(zhi)作成(cheng)型物(wu)品(pin)(pin)的(de)工(gong)(gong)具(ju)(ju)(ju)(ju)(ju)，這種(zhong)工(gong)(gong)具(ju)(ju)(ju)(ju)(ju)由各種(zhong)零件(jian)構(gou)成(cheng)，不同(tong)(tong)的(de)模具(ju)(ju)(ju)(ju)(ju)由不同(tong)(tong)的(de)零件(jian)構(gou)成(cheng)。它主要(yao)通過所成(cheng)型材料物(wu)理狀(zhuang)(zhuang)態的(de)改變來實現(xian)物(wu)品(pin)(pin)外(wai)形(xing)(xing)(xing)的(de)加工(gong)(gong)。素有“工(gong)(gong)業(ye)之(zhi)(zhi)母(mu)”的(de)稱號。在外(wai)力(li)(li)作用(yong)(yong)下使(shi)坯料成(cheng)為(wei)有特定形(xing)(xing)(xing)狀(zhuang)(zhuang)和尺寸的(de)制(zhi)(zhi)件(jian)的(de)工(gong)(gong)具(ju)(ju)(ju)(ju)(ju)。廣泛用(yong)(yong)于沖裁、模鍛、冷(leng)鐓、擠壓(ya)(ya)、粉末冶金件(jian)壓(ya)(ya)制(zhi)(zhi)、壓(ya)(ya)力(li)(li)鑄造，以及工(gong)(gong)程(cheng)塑(su)料、橡膠(jiao)、陶瓷(ci)等制(zhi)(zhi)品(pin)(pin)的(de)壓(ya)(ya)塑(su)或(huo)注塑(su)的(de)成(cheng)形(xing)(xing)(xing)加工(gong)(gong)中。模具(ju)(ju)(ju)(ju)(ju)具(ju)(ju)(ju)(ju)(ju)有特定的(de)輪(lun)廓或(huo)內(nei)腔形(xing)(xing)(xing)狀(zhuang)(zhuang)，應(ying)(ying)用(yong)(yong)具(ju)(ju)(ju)(ju)(ju)有刃口的(de)輪(lun)廓形(xing)(xing)(xing)狀(zhuang)(zhuang)可(ke)以使(shi)坯料按輪(lun)廓線(xian)形(xing)(xing)(xing)狀(zhuang)(zhuang)發生(sheng)分(fen)離（沖裁）。應(ying)(ying)用(yong)(yong)內(nei)腔形(xing)(xing)(xing)狀(zhuang)(zhuang)可(ke)使(shi)坯料獲(huo)得相應(ying)(ying)的(de)立體形(xing)(xing)(xing)狀(zhuang)(zhuang)。模具(ju)(ju)(ju)(ju)(ju)一(yi)(yi)般(ban)包(bao)括動(dong)模和定模（或(huo)凸模和凹模）兩個部分(fen)，二者可(ke)分(fen)可(ke)合。分(fen)開時取出制(zhi)(zhi)件(jian)，合攏時使(shi)坯料注入(ru)模具(ju)(ju)(ju)(ju)(ju)型腔成(cheng)形(xing)(xing)(xing)。模具(ju)(ju)(ju)(ju)(ju)是工(gong)(gong)具(ju)(ju)(ju)(ju)(ju)，形(xing)(xing)(xing)狀(zhuang)(zhuang)復(fu)雜，承(cheng)受坯料的(de)脹力(li)(li)，對結構(gou)強度(du)、剛度(du)、表(biao)面硬(ying)度(du)、表(biao)面粗糙(cao)度(du)和加工(gong)(gong)精度(du)都有較高要(yao)求，模具(ju)(ju)(ju)(ju)(ju)生(sheng)產(chan)(chan)(chan)的(de)發展水平(ping)是機械制(zhi)(zhi)造水平(ping)的(de)重要(yao)標志之(zhi)(zhi)一(yi)(yi)。

摩托車塑件模具