Collapsible toothpaste tubes are manufactured through the process of impact extrusion. This process involves the conversion of a solid billet of metal into a hollow tube by subjecting it to high-pressure impact forces.

Explanation:

Impact Extrusion:
Impact extrusion is a metal forming process that utilizes high-pressure impact forces to shape a solid billet of metal into a hollow tube. The billet is placed in a die cavity, and a punch is rapidly forced into it, causing the metal to flow and take the shape of the die cavity. The force applied is typically in the range of 50 to 100 tons.

Manufacturing Process:
The manufacturing process of collapsible toothpaste tubes involves the following steps:

1. Billet Preparation: The metal billet, usually made of aluminum, is prepared by cutting it to the desired length.

2. Die Design: A die is designed to create the desired shape of the toothpaste tube. The die consists of a cavity that corresponds to the shape and size of the tube.

3. Billet Loading: The prepared billet is loaded into the die cavity.

4. Impact Extrusion: The loaded die and billet are placed in an impact extrusion press. The press applies high-pressure impact forces by rapidly pushing a punch into the billet. The metal flows and takes the shape of the die cavity, forming a hollow tube.

5. Tube Forming: After the impact extrusion process, the formed tube is removed from the die cavity. Additional operations may be performed, such as trimming excess material and shaping the tube's neck and opening.

6. Coating and Printing: The formed tube is coated with a protective layer and printed with the required information, such as the brand name, product details, and ingredients.

7. Capping: The tube is then capped with a plastic or metal closure to ensure the contents remain sealed.

8. Filling: The toothpaste is filled into the collapsible tube through the capped opening.

9. Sealing: The opening is sealed, either by crimping the tube or using a heat sealing process, to prevent leakage.

10. Packaging: The filled and sealed toothpaste tubes are packaged and prepared for distribution.

Advantages of Impact Extrusion:
- High production rates
- Precise control over tube dimensions
- Uniform material distribution
- Ability to produce complex shapes
- Suitable for manufacturing thin-walled tubes
- Efficient use of material

Conclusion:
Collapsible toothpaste tubes are manufactured using impact extrusion, a metal forming process that shapes a solid billet of metal into a hollow tube through high-pressure impact forces. This process allows for the efficient production of uniform, dimensionally accurate tubes, making it suitable for mass production in the toothpaste industry.