The aluminum cap of the wine bottle is not screwed in, but pressed on by a capping machine.

The capping machine has a special head that can grab the aluminum cap, put it on the bottle mouth, and then use mechanical pressure to press the edge of the aluminum cap down to the bottle mouth, so that the aluminum cap is tightly wrapped on the bottle mouth, thus achieving a sealing effect.

1. Capping process
- First, the wine bottles are sent to the bottom of the capping machine through a conveyor belt or other conveying device. The aluminum caps are generally sorted and transported to the capping mechanism of the capping machine in an orderly manner through a feeding device such as a vibrating plate. The capping mechanism will grab the aluminum cap and put it accurately on the bottle mouth of the wine bottle. The principle of this step is mainly to use the precise positioning of the mechanical structure. For example, some capping mechanisms use mechanical claws or suction cups to grab the aluminum cap to ensure that the aluminum cap can be correctly aligned with the bottle mouth.
2. Capping process
- After the aluminum cap is put on the bottle mouth, the capping head of the capping machine starts to work. The capping head will apply a large pressure to the edge of the aluminum cap. Generally, the pressure is provided by a cam mechanism or a hydraulic device. In principle, when pressure is applied, the edge of the aluminum cap will deform under the pressure. The aluminum cap material itself has a certain ductility, and it will bend down along the edge of the bottle mouth and fit tightly to the outside and shoulder of the bottle mouth to form a seal. This process is like pressing an elastic ring against the edge of a cylinder to wrap it around the cylinder.
3. Introduction and features of capping machines
- Introduction: There are many types of capping machines, including manual capping machines, semi-automatic capping machines and fully automatic capping machines. Manual capping machines are mainly operated manually, with a relatively simple structure. They are usually used in small-scale production scenarios such as small winemaking workshops or laboratories. Semi-automatic capping machines require manual placement of wine bottles in the capping position, but the capping process is completed automatically by the machine, and its production efficiency is higher than that of manual capping machines. Fully automatic capping machines use conveyor belts and other devices to automatically transport, cover and cap wine bottles. The entire process requires almost no human intervention and is suitable for industrial production such as large-scale wineries.
- Features:
- High precision: It can accurately put the aluminum cap on the bottle mouth and complete the seal, ensuring that the sealing quality of each wine bottle is relatively consistent. For example, some advanced capping machines can control the sealing accuracy of the aluminum cap within a very small error range, reducing problems such as wine leakage caused by poor sealing.
- High efficiency: Especially the fully automatic capping machine, which can complete the capping of a large number of wine bottles per hour. For example, some high-speed fully automatic capping machines can handle the capping tasks of thousands of bottles of wine per hour, greatly improving production efficiency.
- Adjustability: The pressure, capping speed and other parameters of the capping machine can be adjusted according to different wine bottle sizes and aluminum cap types. For example, for wine bottles of different calibers, you only need to adjust the size and pressure parameters of the capping head to adapt to the new capping task.