紙托制品除了有紙紙托的強(qiáng)度和韌性之外,可以根據(jù)客戶的要求制成各種復(fù)雜的形狀。用作一次性快餐具時(shí),形狀比較簡(jiǎn)單,強(qiáng)度要求也不算高。用作工業(yè)內(nèi)包裝時(shí),其形狀就很復(fù)雜,它必須滿足工業(yè)內(nèi)包裝的三大要求:
In addition to the strength and toughness of paper holder, paper holder products can be made into various complex shapes according to customers' requirements. When it is used as disposable tableware, its shape is relatively simple and its strength requirement is not high. When it is used as industrial inner packaging, its shape is very complex. It must meet the three requirements of industrial inner packaging:
一是定位要求。紙托制品必須能保證被包裝物品在包裝箱內(nèi)有固定位置,要求紙托制品與被包裝物品之間形狀同步,接觸貼切,尺寸準(zhǔn)確。
First, positioning requirements. The paper support products must be able to ensure that the packed articles have a fixed position in the packing box. It is required that the shape of the paper support products and the packed articles is synchronous, the contact is close, and the size is accurate.
二是緩沖要求。紙托整體要有一定的韌性和柔性,表面還應(yīng)該有些松軟,與被包裝物品接觸摩擦?xí)r不能損傷被包裝物品表面光澤,能包裝物品在搬運(yùn)中受到碰撞、振動(dòng)時(shí)產(chǎn)生的沖擊。三是承載。要求制品有一定的強(qiáng)度和剛性來支撐被包裝物和承受外界壓力。為了滿足制品上述功能要求,除了選擇適當(dāng)?shù)脑牧稀⒅鷦┖蜕a(chǎn)工藝之外,更重要的是結(jié)構(gòu)設(shè)計(jì)。

Second, buffer requirements. The paper holder shall have certain toughness and flexibility as a whole, and its surface shall be soft. When it contacts with the packed goods, it shall not damage the surface luster of the packed goods, and it can eliminate the impact of collision and vibration when the packed goods are transported. Third, bearing. The products are required to have certain strength and rigidity to support the package and bear external pressure. In order to meet the above functional requirements of products, in addition to the selection of appropriate raw materials, additives and production processes, the more important is the structural design.
(1)功能性結(jié)構(gòu):
(1) Functional structure:
紙托制品成形工藝特點(diǎn)決定了同一個(gè)紙托只能有一個(gè)厚度,為了適應(yīng)功能要求,在調(diào)整強(qiáng)度和緩沖性時(shí)可利用形腔和立筋,形腔可以增加制品整體的彈性和柔性,立筋可增加制品強(qiáng)度和剛性。在比較大的平面,承載能力要求高時(shí),可以將此處設(shè)計(jì)成瓦楞形或蜂窩形。
The forming process characteristics of paper support products determine that the same paper support can only have one thickness. In order to meet the functional requirements, the cavity and vertical bar can be used when adjusting the strength and buffering. The cavity can increase the overall elasticity and flexibility of the products, and the vertical bar can increase the strength and rigidity of the products. In a relatively large plane with high bearing capacity requirements, it can be designed as a corrugated or honeycomb shape.
(2)工藝性結(jié)構(gòu):由于紙托模塑制品成形初期是個(gè)濕紙坯,在生產(chǎn)過程中,水要逐步析出,制品形狀、位置和尺寸都會(huì)發(fā)生較大變化,在制品的同一個(gè)平面、同一個(gè)方向的不同位置,紙托的收縮總量不同,這時(shí)紙托就要發(fā)生翹曲或扭轉(zhuǎn)變形
(2) Technological structure: since the paper holder molded product is a wet paper blank at the initial stage of forming, during the production process, water should be gradually separated out, and the shape, position and size of the product will be greatly changed. In the same plane and different positions in the same direction of the product, the total shrinkage of the paper holder is different, at this time, the paper holder will be warped or twisted
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