In addition to the strength and durability of paper trays, paper tray products can be made into various messy shapes according to customer requirements. When used as a disposable fast food utensil, the shape is relatively simple, and the strength requirement is not high. When used as an industrial inner packaging, its shape is very messy, and it must meet the three major requirements of industrial inner packaging: First, positioning requirements. Paper tray products must be able to ensure that the packaged items have a fixed position in the packaging box, and the shape of the paper tray products and the packaged items must be synchronized and the touch should be appropriate. The second is buffer requirements. The paper tray should have certain resistance and flexibility as a whole, and the surface should be a little soft. When it touches the packaged product, it should not damage the surface gloss of the packaged product. The packaged product is subjected to shocks and vibrations during transfer. The third is bearing. The product is required to have a certain strength and rigidity to support the packaged object and withstand external pressure. In order to meet the above functional requirements of products, in addition to selecting appropriate raw materials, auxiliaries and production processes, more important is structural planning.
(1) Functional structure:
The forming process characteristics of the paper tray product have decided that the same paper tray can only have one thickness. In order to get used to the functional requirements, the shape cavity and the vertical rib can be used when adjusting the strength and cushioning. The shape cavity can increase the overall elasticity and flexibility of the product. Ribs can increase the strength and rigidity of the product. In a relatively large plane, when the load-bearing talent is required, the place can be planned as a corrugated or honeycomb shape.
2) Process structure:
Since the paper tray molded product is a wet paper blank at the beginning of its forming, the water must be gradually separated during the production process, and the product shape, orientation and scale will change greatly. In the same plane and different orientations in the same direction of the product, The total amount of shortening of the paper tray is different, and the paper tray will warp or change deformation at this time.
