How to distinguish between plate-type pneumatic expansion shafts and keyed pneumatic expansion shafts?

Introduction to Inflatable Shafts ：

Inflatable Shaft Extremely convenient and quick to use. Users only need to provide their own air source, with air pressure controlled within the 6-8kg range. To lock the core, simply inflate with the inflatable shaft gun pointed at the air nozzle. To release the core and material, press the sliding air core on the nozzle to release the air.

　　Short inflation time. Separation and placement of the inflatable shaft and paper tube can be completed in just 3 seconds, with inflation and deflation, without needing to disassemble any parts on the shaft end to achieve a tight fit with the paper tube.

　　Simple paper tube placement: The inflation and deflation actions allow the paper tube to be moved and fixed at any position on the shaft surface.

　　High load capacity: The shaft diameter can be determined based on the customer's actual needs, and high-strength steel is used to ensure a high load capacity.

　　High economic efficiency: The shaft is specially designed to be applicable to various paper tubes of different thicknesses, widths, and narrowness.

　Simple maintenance and long service life: The inflatable shaft is a single part. Each part in its structure has fixed specifications and is interchangeable, making maintenance convenient.

Key Features of Key-Type Inflatable Shafts ：

1. The shaft body uses high-quality steel pipes, with a chrome-plated surface, and aluminum convex keys for flexible extension;

2. Equipped with high-quality rubber inner liner and quick inflation/deflation nozzle, good sealing effect, long service life, detachable shaft head, convenient maintenance.

3. The single-side expansion height after inflation can reach 5mm to 6mm. For example, if the diameter before expansion is 74mm to 75mm, the diameter after expansion can reach 79mm to 82mm. Special expansion heights are available upon request. A 3-inch key-type inflatable shaft typically uses a paper tube inner diameter of 76mm.

Applicable Range of Key-Type Inflatable Shafts Including:

Key-type inflatable shafts The expansion is of a single key bar, the support point is diffused to each key bar, the force is balanced, and the inflatable shaft can be used for mechanical winding of heavier items, such as fabrics, paper products, films, printed matter, leather, composite materials, etc., suitable for coating machines, slitting machines, printing machines, rewinding machines, laminating machines, paper machines, bag-making machines, plastic machines, and other related machinery for winding and unwinding shafts, effectively improving work efficiency.

Plate-type Inflatable Shafts The expansion is of the entire plate, the support points are evenly distributed, the force is uniform, and it is suitable for machinery with high winding precision or for winding lighter items, such as exposure machines, flexographic printing machines, intaglio printing machines, label printing machines, etc.; other machinery includes: coating machines, leather machines, shaping machines, embossing machines, slitting machines, die-cutting machines, rewinding machines, paper tube machines, bag-making machines, laminating machines, film covering machines, film blowing machines, foaming machines, laminating machines, embossing machines, paper machines, non-woven fabric machines, fabric inspection machines, hot stamping machines, battery equipment, and other related machinery.

In practical applications, inflatable shafts made of steel can withstand the winding and unwinding of heavy paper without damage, while aluminum shafts are lightweight and convenient for loading and unloading, reducing labor intensity. They are widely used in printing machines, coating machines, laminating machines, slitting machines, laminating machines, paper, and other related machinery for winding and unwinding purposes.