Common classifications of packaging boxes: injection molded and vacuum formed lunch boxes

　　Injection molded lunch boxes and vacuum formed lunch boxes are two different plastic processing techniques, each with its unique characteristics and advantages and disadvantages. Below are their process characteristics and corresponding pros and cons:

　　Injection Molded Lunch Box Process Characteristics

　　Material Melting: Injection molding involves heating and melting plastic pellets, which are then injected into a mold using an injection molding machine, allowing them to cool and harden into shape.

　　High Precision: The injection molding process has a high degree of precision and consistency, suitable for lunch boxes that require precise sizes and complex structures.

　　Fast Production Speed: Injection molding typically has a fast production speed, suitable for large-scale production.

　　Sturdy and Durable: Due to the high temperature and high pressure manufacturing process, injection molded lunch boxes are usually sturdier and more durable than vacuum formed lunch boxes.

　　Advantages:

　　High precision, capable of producing lunch boxes with precise sizes and complex structures.

　　Fast production speed, suitable for large-scale production.

　　Lunch boxes have higher strength and durability.

　　Suitable for using food-grade plastics.

　　Disadvantages:

　　Higher manufacturing costs, especially the initial mold costs are expensive.

　　Not suitable for small batch production.

　　Some waste may be generated during the injection molding process.

　　Vacuum Formed Lunch Box Process Characteristics:

　　Thermoplastic Processing: Vacuum forming involves heating thermoplastic sheets to soften them, then using negative pressure to adhere them to the mold surface, and finally cooling and hardening into shape.

　　Suitable for Complex Shapes: Vacuum forming is suitable for manufacturing lunch boxes with complex shapes, such as irregular or textured boxes.

　　Low Cost Molds: The cost of making molds for vacuum forming is relatively low, making it suitable for small batch production and quick sample making.

　　Strong Customization: Easy to achieve custom designs, lunch boxes can be made in different shapes and colors according to customer needs.

　　Advantages:

　　Suitable for manufacturing lunch boxes with complex shapes.

　　Lower manufacturing costs, suitable for small batch production and quick sample making.

　　Easy to achieve personalized customization.

　　Disadvantages:

　　Slower production speed, not suitable for large-scale production.

　　Lunch boxes are usually relatively thin and may not be as sturdy as injection molded lunch boxes.

　　May not be suitable for certain foods, as vacuum formed lunch boxes may not withstand high temperatures.

　　In summary, both injection molding and vacuum forming have their unique Applications and advantages.