Structural design of plastic packaging containers

Due to the development and superiority of plastic packaging materials, plastic packaging is gradually replacing other traditional packaging materials. From the perspective of the packaging container structure, plastic packaging containers can be divided into boxes, bottles, cans, tubes, bags, and large containers; from the perspective of molding methods, they can be divided into injection, compression, die-casting, hollow and vacuum-molded containers.

Plastic containers are mainly designed according to packaging requirements. Because plastics have their own special physical and mechanical properties, they must fully display their performance advantages, avoid or compensate for their shortcomings. Under the premise of meeting the requirements of use, the shape of the container should be as simple as possible to simplify the mold structure and conform to the molding. Process characteristics. The main contents of the structural design of the plastic container include the shape, size, wall thickness, and inclination of the container, as well as the reinforcement of the rib bearing surface, round corners, threads, inserts, words, and trademarks.

First, the common types of plastic packaging containers

1. Box packing

Plastic packaging boxes are generally made of thermoplastics, and the walls are often reinforced with reinforcing ribs. The shape can be rectangular or other shapes, and can also be provided with a cover or a partition, which is widely used in the turnover of food containers, beverages, beer and other glass container packaging products, or in the factory transportation of small products, semi-finished products, accessory products and parts. Storage and so on. The common box is shown in Figure 1.

2. Disc packaging

Disc packaging containers generally have stiffeners, commonly made by die casting or extrusion. It is mainly used for the storage and transportation of small, easily deformable, afraid of extrusion products, such as cakes, fruits, eggs and small items in the factory, as shown in Figure 2.

3. Plastic packaging containers for sale

Plastic packaging containers that are used directly for the sale of goods are commonly used for cans, barrels, and cassettes. They are generally manufactured by injection molding, compression molding, and die casting, and are mostly disposable. Its shape is shown in Figure 3.

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