How Many Air Shafts Do You Need For A Packaging Machine

What is the structure of an core expanded shaft?
The structure of an inflatable shaft is a device that uses air pressure to change the diameter of the shaft to achieve tight coiling of tubes. Its main structures include:
1) Shaft body: Usually high-stress steel or aluminum alloy is used to ensure the strength and durability of the structure.
2) Internal expander: The outer diameter of the shaft is changed by air compression, so that it is tightly bonded with the coiled tube.
3) Air valve: an interface to connect to an external air source for inflation and deflation operations.
4) Expansion elements: such as key bars or slats, which act directly on the external drum core to achieve firm locking and quick release.

PRE China factory has a complete range of core shafts, what are their functions and characteristics?
The inflatable shaft should be a shaft that fixes the roll material by inflating, and is often used in printing, packaging and other machinery to fix materials such as paper rolls and film rolls. When inflated, the shaft expands, clamping the material, and when deflated, the material can be easily removed. Its features are as follows:
1) The inflation operation time is short, and the separation and placement of the inflatable shaft and the paper core can be completed in only 3 seconds.
2) The paper core is simple to place: with the action of inflation and deflation, the paper core can be moved and fixed in any position on the shaft surface.
3) Large bearing weight: according to the actual needs of customers, the size of the shaft diameter can be determined, and the use of high hard steel to increase the bearing weight.
4) High economic efficiency: The shaft is designed for special functions, and can be used for all kinds of thick, thin, wide and narrow paper tubes.
5) Simple maintenance and long service time: the inflatable shaft is a single part, and each part in its structure has a fixed specification, which can be interchangeable and convenient, making it easy to maintain.

How many pneumatic expanable shafts does a packaging machine need? Specific analysis is required:
1) Analyze from the type of packaging machinery, because different machines may have different designs and needs. For example, a simple packaging machine may only need one inflatable shaft to unwind the material, while a more complex machine may have both unwinding and rewinding sections
Use an inflatable shaft, or multiple shafts are required for multiple stations. First of all, I need to determine the common types of packaging machinery, such as automatic packaging machines, slitting machines, rewinding machines, bag making machines, and so on. Each machine may have a different structure.
2) From the type of packaging material. If you're dealing with heavier materials, you may need a stronger shaft, but the number may not increase; If you need to process multiple layers of material at the same time, such as composite packaging materials, you may need multiple unwinding spools, each corresponding to one layer of material, and the number of inflatable axes will increase.

The number of inflatable shafts required for a packaging machine depends on its type, function and degree of automation, but is usually between 1 and 6. The following are common configurations in different scenarios:
1) Basic configuration (1-2 roots)
Simple packaging machine (such as automatic sealing and cutting machine): It is a single-shaft unwinding, and may only need 1 inflatable shaft for unwinding materials. The sealing and cutting machine is a fully automatic and unmanned packaging machine, which is widely used in the assembly line operation of mass production packaging, with high work efficiency, automatic film feeding and punching, automatic film sealing and cutting, and automatic coiling of waste materials; Manual adjustment of the film guide system and manual adjustment of the feed conveyor platform is required for products of different widths and heights. It can be used with automatic packaging lines, and is the first choice for product sealing and cutting heat shrink packaging.
Bag making machine: usually equipped with 2 inflatable shafts, one is installed on the unwinding shaft, which is responsible for releasing the coil from the large roll; The other strip is mounted on the winding shaft and is used to re-roll the finished material. Bag making machine: It is a machine that makes all kinds of plastic packaging bags or other material packaging bags, and its processing range is a variety of plastic or other material packaging bags with different sizes, thicknesses and specifications, generally speaking, plastic packaging bags are the main products.

2) Medium complex model (2-4 pieces)
Slitter: 2-4 spindles (multi-unwinding or multi-winding stations) may be required for processing multiple rolls of material at the same time. Slitting machine is a pre-press and post-press equipment that slits a large roll of paper, film, non-woven fabric, aluminum foil, mica tape and other thin materials into small rolls of different widths.
Double-station switching: Equipment with a high degree of automation may be equipped with double unwinding reels (2) to achieve non-stop material change.

3) High-end configuration (4-6 roots)
Rewinder/Laminating Machine: When dealing with multi-layer materials, it may correspond to 1 unwinding reel per layer (e.g. 3 for 3 layers of material), plus rewinding reels, the total number can reach 4-6. Rewinding machine: generally used for mica tape, paper, film rewinding and slitting, playing the role of everything in two, often used for wide coil slitting, more subsequent re-slitting plays an important role, is a special equipment for paper, mica tape and film.
Modular design: Some industrial-grade devices allow for an expanded number of axes to support multi-roll synchronization.

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