How to Seal a Tin Can
The most important working link of the can sealing machine is to seal the mouth of the metal can. Next, we will explain in detail how the can sealing machine seals the can mouth during work.
The feed motion of the double crimping is while the first and second sealing wheels move radially along the can body, while the sealing wheel rotates relative to the can body. The combination of the two movements is called the feed motion. The radial movement of the sealing wheel is called the feed. There are two forms of rotary motion: one is that the can body rotates and the sealing wheel does not move; the other is that the can body does not rotate, and the sealing wheel rotates around the can body. These two different exercises have the same effect on the sealing process. In the process of crimping and sealing, the metal of the part of the can body that participates in crimping has undergone tensile and compression deformation. In order to meet the requirements of the quality of the sealing and crimping, the crimping process should make the metal material deform evenly, and the amount of deformation per unit time is not too large, that is, the sealing wheel is along the diameter of the can body during the rotation of the sealing wheel around the can body. The feed amount in the direction is uniform and cannot exceed a certain limit. The feed rate is small, the sealing quality is good, but it will reduce the production capacity of the equipment; the feed rate is large, the equipment production capacity is improved, but the sealing quality is reduced. Generally, the feeding movement of one sealing wheel of the can-sealing machine is completed in about three revolutions of the sealing wheel around the can body, and the feeding movement of the second sealing wheel is completed in the two revolutions of the sealing wheel around the can body. At present, there are two common feeding methods for the sealing wheel: one is an eccentric mechanism (commonly used for sealing equipment with no rotation of the can body). The sealing wheel is mounted on an eccentric shaft and driven by a planetary gear system to rotate around the can body. Movement, in the process of the sealing wheel rotating around the can body, the eccentric shaft rotates slowly and the eccentric shaft rotates one circle, which completes the feed motion of the two curling. This feed motion is not uniform, but close to the law of cosine; another One kind is to drive the swing arm by a cam. Its motion law depends on the design of the cam. In general, the cam can be designed to move at a constant speed except for the complicated motion wheel at the starting point, ignoring the slight difference between the swing arm and the linear motion. The inlet mode of the sealing wheel of the cam-driven swing arm is relatively close to the uniform feed motion. The more special one is the orbital sealing. This type of can sealing machine adopts a vertical type. The can body is driven by the pressure head and the tray to rotate. A workstation has multiple can bodies that rotate in this way and revolve around the rotation center of the workstation together, and the rotation center is relatively sealed. The arc center of the guide rail is installed eccentrically, and the amount of eccentricity is the total stroke of the sealing feed.