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  • Apr 18,2023

Hinged food containers, also known as clamshell containers, are a popular type of food packaging used in restaurants, fast food chains, and the food service industry. They are a convenient and efficient way to package and transport food, and they come in a variety of shapes and sizes to accommodate different types of food items. But have you ever wondered how hinged food containers are made? In this article, we’ll explore the manufacturing process of hinged food containers.

Material Selection

    • 1. The first step in making hinged food containers is selecting the appropriate material. Hinged food containers are commonly made of plastic, such as polypropylene or polystyrene. These materials are lightweight, durable, and inexpensive, making them ideal for food packaging. Other materials, such as paperboard or aluminum, may also be used for specific types of food products.

Extrusion

  • 2. Once the material is selected, it is extruded into thin sheets using a process called extrusion. The plastic pellets are melted and pushed through a die to form a flat sheet. The thickness of the sheet can be adjusted depending on the desired strength and flexibility of the final product.

Sheet Trimming

  • 3. The extruded sheet is then trimmed to the appropriate size. The sheet is cut into rectangular pieces that will eventually form the top and bottom of the hinged container.

Thermoforming

  • 4. The trimmed sheets are then heated and molded into the shape of the hinged container. This process is called thermoforming. The sheet is placed in a mold and heated until it becomes pliable. Then, a vacuum is used to form the sheet into the desired shape. The mold is then cooled to solidify the plastic.

Hinge Formation

  • 5. The top and bottom pieces of the container are then connected by a hinge. The hinge is typically formed by scoring the plastic with a series of small cuts along the edge of the container. This allows the top and bottom pieces to bend at the hinge, creating a clamshell shape.

Cutting and Trimming

  • 6. The excess plastic around the edges of the container is then trimmed off, creating a neat and uniform edge. The containers are also cut into individual pieces using a die-cutting machine.

Printing and Labeling

  • 7. The containers may then be printed with branding or labeling information using a variety of printing methods, such as screen printing or flexography. This allows the containers to be customized for specific brands or food products.

Quality Control

  • 8. Finally, the hinged food containers undergo quality control checks to ensure that they meet the required standards for food safety and quality. This includes checking for any defects or damage in the containers, as well as ensuring that they are properly sealed to prevent leaks or contamination.

In conclusion, hinged food containers are made through a process that involves material selection, extrusion, sheet trimming, thermoforming, hinge formation, cutting and trimming, printing and labeling, and quality control. The process is highly efficient and can produce large quantities of containers in a relatively short amount of time. Hinged food containers are a staple in the food service industry, providing a convenient and safe way to transport and package food items.