二手制藥旋轉式壓片機組成:
最(zui)早的(de)(de)壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機(ji)是由一(yi)副沖模組成(cheng)(cheng),沖頭(tou)作上(shang)下運(yun)(yun)動將(jiang)顆粒狀的(de)(de)物料壓(ya)(ya)制成(cheng)(cheng)片(pian)(pian)(pian)(pian)(pian)狀,這一(yi)機(ji)器稱(cheng)單沖壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機(ji),以后(hou)發展(zhan)成(cheng)(cheng)電動花籃(lan)式壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機(ji)。這兩種壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機(ji)的(de)(de)工(gong)作原理(li)仍(reng)然是以手工(gong)壓(ya)(ya)模為基礎的(de)(de)單向壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian),即(ji)壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)時下沖固定不動,僅上(shang)沖運(yun)(yun)動加壓(ya)(ya)。這種壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)的(de)(de)方(fang)式,由于上(shang)下受力不一(yi)致(zhi),造成(cheng)(cheng)片(pian)(pian)(pian)(pian)(pian)劑內部的(de)(de)密(mi)度不均(jun)勻,易(yi)產生裂(lie)片(pian)(pian)(pian)(pian)(pian)等(deng)問題。
針對單向壓(ya)(ya)片機存(cun)在的這(zhe)種缺點,一種旋轉(zhuan)式多沖(chong)雙向壓(ya)(ya)片機開(kai)始誕生。這(zhe)種壓(ya)(ya)片機上下沖(chong)同(tong)時均勻地加(jia)壓(ya)(ya),使藥物顆粒中的空氣有充裕(yu)的時間(jian)逸出模(mo)孔(kong),提高了片劑密度的均勻性,減少(shao)了裂片現(xian)象。除此以外,旋轉(zhuan)式壓(ya)(ya)片機還具有機器振動小、噪聲低、耗能少(shao)、效率高和壓(ya)(ya)片重量準確等(deng)優(you)點。
旋轉(zhuan)式壓(ya)片(pian)(pian)機(ji)(ji)(ji)是由均布于轉(zhuan)臺(tai)的多(duo)副沖模按一(yi)(yi)定(ding)軌(gui)跡(ji)作圓周(zhou)升降運動(dong),通過壓(ya)輪將顆粒(li)狀物(wu)料壓(ya)制(zhi)(zhi)成片(pian)(pian)劑的機(ji)(ji)(ji)器(qi)。而沖桿隨轉(zhuan)臺(tai)旋轉(zhuan)的線速(su)度≥60m/min的壓(ya)片(pian)(pian)機(ji)(ji)(ji)稱之為高(gao)速(su)旋轉(zhuan)壓(ya)片(pian)(pian)機(ji)(ji)(ji),這種高(gao)速(su)旋轉(zhuan)壓(ya)片(pian)(pian)機(ji)(ji)(ji)具有強迫供(gong)料機(ji)(ji)(ji)構,機(ji)(ji)(ji)器(qi)由PLC控(kong)制(zhi)(zhi),有自(zi)動(dong)調節壓(ya)力、控(kong)制(zhi)(zhi)片(pian)(pian)重、剔(ti)除廢片(pian)(pian)、打(da)印(yin)數(shu)據、顯示故障停機(ji)(ji)(ji)等功能(neng),除能(neng)控(kong)制(zhi)(zhi)片(pian)(pian)重差異在(zai)一(yi)(yi)定(ding)的范圍(wei)內以外,對缺角、松(song)裂片(pian)(pian)等質量(liang)問題能(neng)自(zi)動(dong)鑒別并(bing)能(neng)剔(ti)除。
壓片(pian)機所(suo)壓的(de)(de)(de)片(pian)形(xing),最初多為扁圓(yuan)(yuan)形(xing),以后發展(zhan)為上下兩面的(de)(de)(de)淺圓(yuan)(yuan)弧形(xing)和深圓(yuan)(yuan)弧形(xing),這(zhe)是為了包衣(yi)的(de)(de)(de)需要。隨著異形(xing)壓片(pian)機的(de)(de)(de)發展(zhan),橢圓(yuan)(yuan)形(xing)、三角形(xing)、長圓(yuan)(yuan)形(xing)、方(fang)(fang)形(xing)、菱(ling)形(xing)、圓(yuan)(yuan)環形(xing)等(deng)(deng)片(pian)劑(ji)隨之產生。另外,隨著制劑(ji)的(de)(de)(de)不斷發展(zhan),因復方(fang)(fang)制劑(ji)、定時釋(shi)放制劑(ji)的(de)(de)(de)要求,而制成雙層、三層、包芯等(deng)(deng)特殊的(de)(de)(de)片(pian)劑(ji),這(zhe)些都需在特殊壓片(pian)機上完成。
隨著市場(chang)需求的(de)發(fa)展,壓(ya)片(pian)(pian)機的(de)適(shi)用范圍(wei)也越(yue)來越(yue)廣(guang),不再(zai)單(dan)純的(de)局限(xian)于壓(ya)制(zhi)中、西藥(yao)(yao)片(pian)(pian)劑(ji),更(geng)可以廣(guang)泛的(de)壓(ya)制(zhi)保健(jian)食(shi)品(pin)、獸藥(yao)(yao)片(pian)(pian)劑(ji),化工(gong)片(pian)(pian)劑(ji):諸如(ru)樟腦丸衛生球(qiu)、洗滌塊、藍精靈塊、美術粉餅(bing)、農藥(yao)(yao)片(pian)(pian)劑(ji)等,食(shi)品(pin)片(pian)(pian)劑(ji):雞精塊、壓(ya)縮餅(bing)干等。
二手制藥旋轉式壓片機的(de)工作過程可以分為如下步驟:
1. 下沖的沖頭部位(其工作位置朝(chao)上)由中模孔下端伸(shen)入(ru)中模孔中,封住中模孔底;
2. 利用加(jia)料(liao)器向中模(mo)孔中填充(chong)藥物(wu);
3. 上沖的(de)沖頭部(bu)位(其工作位置朝下(xia))自中模孔上端落入中模孔,并下(xia)行(xing)一定行(xing)程,將(jiang)藥粉(fen)壓制(zhi)成片;
4. 上沖提升出(chu)(chu)孔。下(xia)沖上升將藥片頂(ding)出(chu)(chu)中模孔,完成一次壓片過程;
5. 下沖降到原位(wei),準備下一次填充。