一、緊箍(gu)交(jiao)接處焊接不良直接影(ying)響紙板桶的(de)強度:
為了增加北京紙桶強度,在北京紙桶上、下口部位設有上、下緊箍,桶中部位的桶箍稱為上緊箍,下部桶箍稱為下緊箍。上下緊箍的主要作用有:保證紙板桶的強度,并保持桶口、桶身處的圓度;加固封閉器,能使桶蓋與桶口很好地定位,保持良好的互換性能;固定桶身與五合板成為牢固的整體。緊箍的制作材料是鋼帶,將鋼帶剪成規定的長度,交接處經點焊、焊接后與桶口部位壓制成一體即成緊箍,如焊接時電流過大則擊穿焊接部位,電流太小則造成虛焊,無論是上述哪一種情況,緊箍將是形同虛設,使桶身與桶底或桶蓋脫離,如果出現桶底部與五合板連接處脫開,若內裝物系易燃、易爆物品及有毒物品等危險貨物,還會釀成較為嚴重的事故。
二、北京紙桶成型工藝對紙桶質量的影響:
紙(zhi)桶(tong)(tong)生(sheng)(sheng)產(chan)過(guo)程加桶(tong)(tong)身(shen)與桶(tong)(tong)底(di)(di)的連接主要(yao)靠封底(di)(di)工(gong)(gong)序(xu)來完成(cheng),所以(yi)封底(di)(di)設備的準確度和精密度以(yi)及封底(di)(di)工(gong)(gong)序(xu)的操作(zuo)(zuo)質(zhi)(zhi)量將(jiang)會影(ying)響(xiang)紙(zhi)桶(tong)(tong)的整體(ti)質(zhi)(zhi)量。因(yin)此(ci)桶(tong)(tong)箍(gu)凹槽圓(yuan)弧的形狀(zhuang)及預訂尺寸合理(li)與否,對紙(zhi)板(ban)(ban)桶(tong)(tong)質(zhi)(zhi)量影(ying)響(xiang)極大。桶(tong)(tong)箍(gu)凹槽過(guo)深且(qie)圓(yuan)弧弧度小,容易(yi)在成(cheng)型過(guo)程中壓斷(duan)桶(tong)(tong)身(shen);桶(tong)(tong)箍(gu)凹槽過(guo)淺且(qie)圓(yuan)弧弧度過(guo)大則(ze)直(zhi)接影(ying)響(xiang)桶(tong)(tong)底(di)(di)與桶(tong)(tong)身(shen)的連接,鐵板(ban)(ban)卷到桶(tong)(tong)身(shen)的量相對較少,造(zao)成(cheng)紙(zhi)板(ban)(ban)與五合板(ban)(ban)結合不(bu)牢。所以(yi)成(cheng)型工(gong)(gong)藝操作(zuo)(zuo)應經常(chang)檢查(cha)封底(di)(di)模具各(ge)部的尺寸彎化(hua),工(gong)(gong)人應嚴(yan)格(ge)按工(gong)(gong)藝規程操作(zuo)(zuo),防止因(yin)此(ci)產(chan)生(sheng)(sheng)的偏差造(zao)成(cheng)紙(zhi)桶(tong)(tong)底(di)(di)部的結合松緊不(bu)一,從而影(ying)響(xiang)桶(tong)(tong)底(di)(di)與桶(tong)(tong)身(shen)的吻合。
三、原、輔材料的(de)質(zhi)量:
對紙(zhi)(zhi)板(ban)桶(tong)(tong)質(zhi)量的(de)影響桶(tong)(tong)所用的(de)原料包括:牛皮(pi)紙(zhi)(zhi)、膠合(he)板(ban)、帶(dai)鋼、粘合(he)劑(ji)等。目前令人(ren)感到(dao)憂(you)慮的(de)是紙(zhi)(zhi)板(ban)桶(tong)(tong)生產企(qi)業之(zhi)間的(de)競(jing)爭大(da)部(bu)分(fen)停留在價格競(jing)爭上,以質(zhi)量參與競(jing)爭的(de)很少(shao)。企(qi)業為(wei)爭壓客戶(hu)不(bu)得不(bu)偷工(gong)減料上做文章(zhang),以低克(ke)(ke)重(zhong)的(de)紙(zhi)(zhi)代(dai)替高克(ke)(ke)重(zhong)的(de)紙(zhi)(zhi);五合(he)板(ban)材質(zhi)不(bu)均勻,缺材、斷層(ceng)等現象(xiang)時有發生;層(ceng)與層(ceng)間的(de)粘合(he)強度低,甚至脫離(li);下料尺寸公(gong)差(cha)撐握不(bu)準;粘合(he)劑(ji)使用廉價膠造成桶(tong)(tong)身質(zhi)量差(cha)等。
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