1. Cavities and stiffeners. The buffering effect of the paper holder is mainly realized by using the elastic deformation of the paper wall to slow down and offset the external force when it is impacted. The elasticity of the paper support material itself is not high, mainly depends on the design of the reinforcing ribs of the product and the buffer cavity formed. The design of the cavity and the reinforcing ribs plays a vital role in the elastic deformation of the paper support, that is, the buffering capacity. , and the basic basis of cavity and rib design is the shape and use of the product itself. In the structure design of the paper support, a cavity is set to ensure the dynamic buffering performance of the paper support, and the reinforcing ribs are set to increase the strength of the paper support itself.

Several cavities with simple shapes and good dynamic buffering performance are evenly distributed in the electrical paper support structure, which plays the role of buffering, stabilizing and improving strength. Problems such as falling can be solved by setting up several or symmetrical reinforcing ribs. The setting of the cavity and the reinforcing ribs should fully consider the problems of convenient production, simple processing, uniform distribution, and uniform distribution of the gravity of the product.

2. Fixed support surface. This is the most basic point in the design of the paper tray structure. The fixed support surface can be determined according to the requirements of the packaged product, the external dimensions and the internal dimensions of the outer packaging. For example, to design a paper tray packaging for electrical products, the length, width and corresponding structural form of the paper tray can be determined according to the outer dimensions of the package and the internal dimensions of the outer packaging, and thus the fixed support surface of the paper tray can be determined. .

At the same time, it is necessary to understand whether the focus of packaging is on strength or on buffering. The packaging of some heavy and high-strength products focuses on strength, but as a buffer packaging, its buffering performance must also be maintained, and the packaging side of some valuable products. The emphasis is on cushioning, and its packaging must also have a certain strength. In the design, the two should be properly combined, and the appropriate base points should be selected according to the shape structure, gravity center and strength of the packaged product, and then the fixed support surface should be determined by these base points.

3. Related parameters. Determine the relevant parameters in the design according to the requirements of the packaged products and the characteristics of the structural design of the electrical paper support products.

① Size and wall thickness. The basic requirement of the structural design of the paper support product is to ensure close contact with the packaged object to prevent the packaged object from running in the circulation process. It must be compact, and the compact size is solved by the comprehensive cooperation of the fixed support surface, the cavity and the reinforcing ribs.

In the structural design, the wall thickness of the paper holder should be determined according to the use conditions of the electrical paper holder and the type of paper fiber used. The wall thickness is an important factor affecting the strength of the paper holder. The increase of the wall thickness not only increases the consumption of raw materials, but also reduces the production during adsorption molding. The support produces quality defects such as depressions, shrinkage holes and sandwiches. On the premise of meeting the strength of the paper support, the wall thickness should be reduced as much as possible. The wall thickness is between 0.5 and 6 mm when the vacuum adsorption molding process is used, and between 3 and 20 mm when the press molding process is used.

②Transition arc. In the design of the paper support structure, the corners of the inner and outer surfaces of the paper support, the connection between the vertical rib and the main body, and the terminal of the vertical rib must all use arc transitions to avoid straight edges and right angles. The arc transition is beneficial to the manufacture of the mold and the attachment of the mesh, to the demoulding during the transfer of the wet paper mold, to the flow of the pulp material during adsorption and molding, and to avoid the damage to the packaging caused by stress concentration. The radius of the transition arc can be determined according to the specific product and paper material properties and the special requirements of packaging, generally 2 to 5mm.

③ Demoulding slope. In the paper mold forming process, the wet paper mold is closely attached to the screen mold and the paper fiber is embedded in the mesh of the screen mold. In order to facilitate the transfer of the wet paper mold, the surface of the paper support parallel to the demoulding direction should be There is a reasonable demoulding slope. The greater the inclination, the more convenient the demoulding is, and the smaller the inclination, the more difficult it is to demould, and the surface of the paper holder will be scratched or broken. Excessive inclination will reduce the dimensional accuracy of the paper support, and also affect the bearing capacity and elastic recovery force of the paper support. Generally, the demolding slope is 3° to -6°.