What To Pay Attention To When Drawing An Air Expanded Shaft

The following points need to be paid attention to when drawing an inflatable shaft:

1) The style of the core pneumatic shaft should be indicated when customizing (the length is convex key type and tile type inflatable shaft, as well as the length key type and slip type, which will be more expensive), and the external dimensions are drawn according to the equipment requirements The diameter, length, shaft head size and total length of the flatulence part are drawn;
2) The position of the valve needs to be marked, and the tolerance of the important size on the shaft head should be clearly indicated and the material should be remarked;
3) When purchasing an inflatable shaft, the manufacturer should be informed of the maximum load, otherwise the shaft is easy to bend when the load is too heavy, and it is not good;
4) Generally, it is recommended to use the key bar type for heavier load-bearing, the load-bearing capacity will be better, and it is also more durable;
5) When drawing, the flatulence part in the middle should be paid attention to to adapt to the diameter of the paper tube.

The types of inflatable shafts are: plate inflatable shafts, key inflatable shafts; There are also long key inflatable shafts, cantilever inflatable shafts, convex key inflatable shafts, etc.;

Key inflatable shaft, also called convex key inflatable shaft, key bar inflatable shaft:

1) The middle expansion part of the key inflatable shaft is the key bar, and there are options such as glue keys and aluminum bonds; The unilateral expansion height of the key bar can reach 3mm-4mm, such as the diameter of the 3-inch inflatable shaft is 74mm-75mm before expansion, and the diameter is 79mm-82mm after inflation expansion;
2) The key bar is raised after the key shaft is inflated, and the key bar can support the paper tube and balance the force; Strong load-bearing capacity, which can rewind products with heavy weight; The application scenario is mechanical winding and unwinding equipment, such as: film machine, printing machine, leather machine, etc.;

Plate inflatable shaft, also called tile inflatable shaft, six-piece inflatable shaft, plate inflatable shaft:
1) The middle expansion part of the plate inflatable shaft is the plate, which is generally composed of six plates; The expansion height of the plate after inflation can reach 3mm-4mm, such as the diameter of the 3-inch inflatable shaft before expansion is 74mm-75mm, and the diameter after inflation is 79mm-82m;
2) The plate inflatable shaft expands with six plates after inflation, and the support force is evenly dispersed and the force is good; It is suitable for products with relatively light weight and high precision requirements.

Working principle of through-key inflatable shaft:
With the principle of air compression, the outer diameter of the shaft is changed, and then it is tightly combined with the coil pipe, which is convenient for the sending and winding of the whole coil of material.
Facilitate on-line operations
reasonable, simple, accurate and automated; When air is injected into the interior and expands, the parts inside the shaft body are expanded and extruded, and become outside the shaft body
The increased diameter allows the reel to be fixed on the shaft body with full width and precision. When the internal air is released, the expansion of the extruded part is retracted, and the shaft can be retracted
It is very convenient to be taken out.

Through-bar inflatable shaft (air expansion shaft): The expansion part of the through-bar inflatable shaft (air expansion shaft) is a long key bar, which has the characteristics of high precision, high load-bearing and light weight.

There are many ways to install an inflatable shaft:
1) The inflatable shaft is a specially customized winding and unwinding shaft, which is inflated and expanded to tighten the paper tube/roll; Therefore, when the inflatable shaft is installed, the air valve should be facing outward, which is convenient for charging and deflating;
2) Since the inflatable shaft style has biaxial type and cantilever type, and the customer installs it according to the equipment, there are many kinds of installation methods;
3) When the inflatable shaft is used with the safety chuck, the installation method of the inflatable shaft is very simple, and it can be directly stuck in the safety chuck;
4) When the shaft head method of simple locking of the inflatable shaft is adopted, it can be fixed with the shaft seat, and the opening can be locked with screws;
5) The installation method of the cantilever inflatable shaft is to fix the shaft head on the mounting plate, and the bearing can be rotated to collect and discharge.

The inflatable shaft can be used in a wide range of scenarios:
The equipment that has the needs of rewinding, unwinding, slitting and other operations can be used to the inflatable shaft: such as coating machine, leather machine, setting machine, embossing machine, gravure machine, trademark printing machine, slitting machine, die-cutting machine, embossing machine, paper machine, non-woven machine, cloth inspection machine, rewinding machine, paper tube machine, paper machine, laminating machine, laminating machine, film blowing machine, foaming machine, laminating machine, hot stamping machine, flexo printing machine, etc.

Causes and solutions of airbag leakage of inflatable shaft:
In the process of long-term use of the inflatable shaft, if the airbag leaks, it will cause the inflatable shaft to not expand and expand, which will affect the rewinding and unwinding operation of the coiled tube. Cause Analysis and Solution:
1) The key bar of the inflatable shaft is broken, and the spring sheet or screw falls off and the airbag is punctured; → replace key strips, spring blades, screws, and airbags.
2) The inflatable shaft is used for too long, and the airbag is aging, resulting in air leakage; → replace the airbags.
3) The inflatable shaft has been used for a long time, and the air valve is aging, resulting in air leakage; → replace the valve.
4) The sealing ring of the inflatable shaft is aging and there is a gap, resulting in air leakage; → replace the seal.

Contact us