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Unique bag-making technology from Italy
Issue date:01/04/2011
China Plastic & Rubber Journal (CPRJ) - Apr 2011 Issue
Source:China Plastic & Rubber Journal
意大利塑料橡膠機械製造廠商協會(ASSOCOMAPLAST)秘書長 Mario Maggiani
包裝工業的特殊要求層出不窮,即使是製袋機的生產商也不得不考慮與袋子相關的技術、美學以及商業方面的問題。本文介紹三家意大利製造商在這方面的最新技術。
目前異形袋最流行的形狀是錐形,用於包裝花卉和盆栽植物。
目前異形袋最流行的形狀是錐形,用於包裝花卉和盆栽植物。
包裝工業的特殊要求層出不窮,尤其是對於塑料袋這種產品,已不僅僅要求採用更具競爭力的薄膜擠出技術以及能夠提高薄膜性能的先進的聚合物。如今,即使是製袋機的生產商也不得不考慮與袋子相關的技術、美學以及商業方面的問題。

本文介紹三家意大利製造商在這方面的創新技術。

異形袋

在全球範圍,最常見的包裝袋是矩形的聚乙烯和聚丙烯袋子,這種袋子數量巨大,用於包裝各種各樣的產品,然而還有一個鮮為人知卻非常有趣的細分巿場,那就是異形袋巿場。

異形袋製袋機主要在三個方面區別於常規的製袋機:首先,熱封頭完全不相同;第二,碼垛系統必須與袋子的形狀相配合;最後,大多數形狀會產生不規則廢料,必須在生產線上從袋子上分離開。

意大利CIBRA公司的異形袋製袋機的熱封頭採用獨特的生產技術。袋子的接縫由裝在絕熱器內、按照設計尺寸切割的加熱元件焊接起來。每一個熱封頭都是根據客戶的規格要求手工製成的。最近開發的機器,例如Glovestar,可以互換熱封頭,因此可以生產多種不同形狀的袋子。

在異性袋中,目前最流行的是錐形袋,用於包裝花卉和盆栽植物。錐形袋對花卉起到保護的作用,通過袋子上的精美印刷裝飾可以增強產品吸引力,並且更易於花卉和植物的運輸。這些產品一般在大型超巿出售。通常,花卉和盆栽植物都是自動包裝,因此,預切了折邊和掛孔的袋子則需要整齊疊放。

命名為FlowerTOP的製袋生產線可以滿足所有這些要求。它可以使用任何一種薄膜:PE、PLA、BOPP以及CPP。它使用兩個分開的收捲輥以獲得特殊的效果例如金屬感薄膜或者透明薄膜。熱封棒平直放置在一個側封機構中,可以生產高度在15-110cm之間的袋子。熱封棒可以調整到任何角度。

袋子按照規定的數量碼垛並且提供了多個加工選項:呼吸孔;在整垛袋子的頂部做1-3個熱衝孔;底部熱封(當盤栽植物需要在貨架上展示數天,需要加水保養而不能弄臟場所時會用到);香蕉形衝孔,形成便於攜帶的手柄;以及在袋子邊上做預切口,便於撕開袋子從而在取出精美的鮮花,如蘭花時,不至於使花朵受到損傷。

製袋機的平均速度是每分鐘70個工作行程,每個行程產生2個袋子,每小時的產量是8000個袋子。

--www.cibra.it--


Elba製袋機。
熱封製袋機

意大利ELBA帶來了兩種製袋機:SAV30用於生產預製袋,SA90TVB用於熱收縮膜製袋。

SAV30設計用於生產各種類型的袋子,例如三邊封袋,自立袋(底部為橢圓形),折邊袋,以及帶有拉鏈、調節閥或者吸嘴的袋子。得益於最近的技術革新,生產速度可以達到每分鐘250個工作行程,從而使配置了多個工作通道的設備取得極高的產量。

SA90TVB自動封切機的設計適用於生產以熱收縮薄膜為材料的真空包裝袋,應用於食品包裝。該設備可以生產細焊邊的側封袋,寬焊邊的底封袋和側封袋(最小袋寬為80mm)以及寬焊邊的半圓形密封袋。該設備特點是熱封和分切步驟的分離。

這一解決方案使熱封部位可以保持張力直至完全冷卻,避免邊緣產生皺褶。

--www.elba-spa.it--


Mobert捲取式製袋機。
捲取式製袋機

來自意大利的MOBERT公司提供兩種機型的製袋機:Roller 110 SHP和Nastrosac 130 Duo。

前者用於生產購物袋和底部密封袋。其專利的冷切系統僅通過關閉一個加熱棒即可從單一熱封改變為雙重熱封,不需要做任何機械調整就可以快速切換生產任務。

生產程序首先從一個寬度為1700mm的自動對中電動調節的捲軸開始,袋子分三條工作線同時進行側封和折疊。然後三條工作線經導引進入熱封站,由一根寬度為1,100mm的熱封棒對袋子進行底部熱封和打孔以便於袋子間的撕開。一台自動收捲機配置了紙筒插入設備,同時在三個捲軸上完成袋子的捲取、密封和卸輥。

這一生產線配置了一台非常易於使用的革新性的打孔設備,可以避免生產線開機和運行時艱巨的調節工作,顯著減少停機時間並提高生產效率。

這一生產線可以分三線生產捲取式袋子,三條工作線具有同樣的補償和自動位置對整功能,產量達到每分鐘750個袋子。

型號為Nastrosac 130 Duo的製袋機可以雙線生產捲取式穿繩袋,產能可以達到每分鐘500個袋子。

同一生產線也可以生產捲取式的底封穿繩袋。拉繩在生產線一開始處導入,由兩個特殊的裝置在袋子頂部折邊,插入繩子然後在折邊處進行縱向密封。

--www.mobert.it--
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