Plastic Box Design Considerations

- May 03, 2019-

The design of many products is a very important part, it determines whether the appearance is attractive to customers, is it reasonable. The design of the plastic box is also very important. Here are some of the factors that are considered in the design.

Since most plastics have notch sensitivity, plastic boxes are prone to cracks and cracks at sharp corners, roots of the mouth threads, necks, etc., so these parts should be designed to be rounded. For the transfer of the rectangular plastic box, it is necessary to support most of the load of the plastic box, so locally increasing the wall thickness at this place is also advantageous for improving the rigidity and load resistance of the plastic case. The printed surface of the plastic box is the most concentrated part of the consumer's attention. Therefore, in order to ensure the rigidity of the plastic box, in addition to selecting a material with high rigidity, the shape of the plastic box is also designed to enhance the rigidity and load resistance of the plastic box.

When the surface of the plastic box is marked, the surface of the label should be flat. A "sash" can be designed on the surface of the plastic box to make the label accurately positioned without moving. At the time of blow molding, the portion where the parison inflates first contacts always tends to be hardened first. Therefore, the wall thickness of this part is also larger. The edge and the corner portion are the portions where the parison inflates the last contact, and the wall thickness of the portion is small.

The printed surface should be flat and continuous; if the plastic box contains handles, grooves, ribs, etc., care should be taken not to inconvenience the printing operation. The oval plastic box has a higher rigidity, but the manufacturing cost of the mold is higher. Therefore, the edges and the corners of the plastic box should be designed to be rounded. Changing the surface shape of the plastic case, such as the relatively thin middle portion of the plastic case, increases the circumferential groove or rib of the surface of the plastic case, which improves the rigidity and bending resistance of the plastic case. Longitudinal grooves or ribs eliminate the offset, sagging or deformation of the plastic case under long-term load.

With the advancement of technology and the emergence of new processes, plastic boxes will also be diversified, so its design will also change. I believe that there will be more colorful products coming out.