二手制藥旋轉式壓片機組成：

最(zui)早的壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機是由一(yi)(yi)副沖(chong)模組成(cheng)，沖(chong)頭作上下(xia)運動將顆粒狀(zhuang)的物(wu)料壓(ya)(ya)制成(cheng)片(pian)(pian)(pian)(pian)(pian)狀(zhuang)，這一(yi)(yi)機器稱(cheng)單沖(chong)壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機，以(yi)后發展成(cheng)電動花籃式壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機。這兩種(zhong)壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)機的工(gong)作原理(li)仍然是以(yi)手工(gong)壓(ya)(ya)模為基礎的單向壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)，即壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)時下(xia)沖(chong)固(gu)定不動，僅上沖(chong)運動加壓(ya)(ya)。這種(zhong)壓(ya)(ya)片(pian)(pian)(pian)(pian)(pian)的方(fang)式，由于上下(xia)受(shou)力不一(yi)(yi)致(zhi)，造成(cheng)片(pian)(pian)(pian)(pian)(pian)劑內部的密(mi)度不均勻，易產生裂片(pian)(pian)(pian)(pian)(pian)等問題。

針(zhen)對單(dan)向(xiang)(xiang)壓(ya)片(pian)機存在的這(zhe)(zhe)種(zhong)(zhong)缺點(dian)(dian)，一(yi)種(zhong)(zhong)旋轉式(shi)多沖雙向(xiang)(xiang)壓(ya)片(pian)機開(kai)始(shi)誕生。這(zhe)(zhe)種(zhong)(zhong)壓(ya)片(pian)機上下沖同時均勻(yun)地加(jia)壓(ya)，使藥物(wu)顆粒(li)中的空氣有充裕的時間逸出(chu)模孔，提高了(le)片(pian)劑密度的均勻(yun)性，減少了(le)裂片(pian)現象。除此以外(wai)，旋轉式(shi)壓(ya)片(pian)機還(huan)具有機器振動小、噪聲(sheng)低、耗能(neng)少、效率高和壓(ya)片(pian)重(zhong)量準確等優點(dian)(dian)。

旋轉式壓(ya)片(pian)(pian)機(ji)是由均(jun)布(bu)于(yu)轉臺(tai)的(de)多副沖模(mo)按(an)一定軌跡作圓周(zhou)升(sheng)降運(yun)動(dong)，通過壓(ya)輪將顆粒狀(zhuang)物(wu)料壓(ya)制(zhi)成片(pian)(pian)劑的(de)機(ji)器。而沖桿隨轉臺(tai)旋轉的(de)線速度(du)≥60m/min的(de)壓(ya)片(pian)(pian)機(ji)稱之為高速旋轉壓(ya)片(pian)(pian)機(ji)，這種高速旋轉壓(ya)片(pian)(pian)機(ji)具有強迫(po)供(gong)料機(ji)構，機(ji)器由PLC控制(zhi)，有自動(dong)調節壓(ya)力、控制(zhi)片(pian)(pian)重、剔(ti)除廢(fei)片(pian)(pian)、打印(yin)數據、顯示故障(zhang)停機(ji)等功能(neng)，除能(neng)控制(zhi)片(pian)(pian)重差異在一定的(de)范圍內以外(wai)，對缺角、松裂(lie)片(pian)(pian)等質量問題能(neng)自動(dong)鑒別并(bing)能(neng)剔(ti)除。

壓(ya)(ya)片(pian)(pian)機(ji)所(suo)壓(ya)(ya)的(de)片(pian)(pian)形(xing)(xing)(xing)，最初多為(wei)扁圓(yuan)形(xing)(xing)(xing)，以后發展(zhan)為(wei)上(shang)(shang)下兩面的(de)淺圓(yuan)弧(hu)形(xing)(xing)(xing)和(he)深圓(yuan)弧(hu)形(xing)(xing)(xing)，這是為(wei)了包衣的(de)需要(yao)。隨著(zhu)異形(xing)(xing)(xing)壓(ya)(ya)片(pian)(pian)機(ji)的(de)發展(zhan)，橢圓(yuan)形(xing)(xing)(xing)、三角形(xing)(xing)(xing)、長圓(yuan)形(xing)(xing)(xing)、方形(xing)(xing)(xing)、菱形(xing)(xing)(xing)、圓(yuan)環形(xing)(xing)(xing)等(deng)片(pian)(pian)劑(ji)隨之(zhi)產生。另外，隨著(zhu)制(zhi)劑(ji)的(de)不斷(duan)發展(zhan)，因復方制(zhi)劑(ji)、定時釋放制(zhi)劑(ji)的(de)要(yao)求，而制(zhi)成雙層(ceng)、三層(ceng)、包芯等(deng)特殊(shu)的(de)片(pian)(pian)劑(ji)，這些都需在特殊(shu)壓(ya)(ya)片(pian)(pian)機(ji)上(shang)(shang)完成。

隨著市場需求(qiu)的(de)(de)發展，壓(ya)(ya)片(pian)機(ji)的(de)(de)適用范圍也越(yue)(yue)來越(yue)(yue)廣(guang)(guang)，不再單純的(de)(de)局限于(yu)壓(ya)(ya)制中(zhong)、西藥片(pian)劑(ji)，更可以廣(guang)(guang)泛的(de)(de)壓(ya)(ya)制保健食(shi)品、獸藥片(pian)劑(ji)，化(hua)工片(pian)劑(ji):諸如樟腦(nao)丸衛生球、洗(xi)滌(di)塊、藍精靈(ling)塊、美術粉餅(bing)、農藥片(pian)劑(ji)等(deng)，食(shi)品片(pian)劑(ji):雞(ji)精塊、壓(ya)(ya)縮餅(bing)干(gan)等(deng)。

二手制藥旋轉式壓片機的工作過程可以(yi)分為如下步驟(zou):

1. 下沖(chong)的沖(chong)頭(tou)部位(wei)(其工作位(wei)置朝上)由中(zhong)模(mo)孔(kong)下端(duan)伸入(ru)中(zhong)模(mo)孔(kong)中(zhong)，封住中(zhong)模(mo)孔(kong)底;

2. 利用加料器向中模孔(kong)中填充(chong)藥物;

3. 上(shang)沖(chong)的沖(chong)頭部位(其工作(zuo)位置朝(chao)下(xia))自(zi)中模孔(kong)上(shang)端落入(ru)中模孔(kong)，并下(xia)行(xing)一(yi)定行(xing)程，將藥(yao)粉壓制成片(pian);

4. 上沖提升出孔。下(xia)沖上升將藥片頂(ding)出中(zhong)模(mo)孔，完(wan)成一次壓片過程(cheng);

5. 下(xia)沖降到(dao)原位，準備下(xia)一次(ci)填充。