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Jctprint Machinery Co., Ltd
Custom designed air shaft for coating machine.
1. Usage :
Air shaft is widely used in printing, packaging, plastic, paper making, spinning industries for all the machines with the winding, rewinding unit and slitting unit for the operation of material in roll.
2 . Classification :
According to the structure, the shaft can be divided into key type air shaft and lath type air shaft.
Most are using the key type air shaft, and lath type air shaft is usually used on rewinding part of slitting machine or thin paper core.
Because thin paper core is easy to be out of shape.The key type air shaft is possible to make the paper core broken.The tile type air shaft is three pieces of tiles after inflation.The roundness is good.
But compared with key type air shaft,the strength and load is smaller and the price is higher.
So most customer will choose key type air shaft. We need to choose suitable not expensive product.
3. Specifications :
1). Type:Key Type Air Shaft ,Lug type air shaft,leaf type air shaft
2). Specification: 1.5" 2" 3" 4" 4.5" 6" 8"
3). Material: No.45 steel/ Aluminum
Type | Unaerated diameter(ømm) | Inflated diameter(ømm) | Applicable volume tube inner diameter(ømm) |
1″ | 24.8 | 24.8-28 | 25-26 |
1.5″ | 37 | 40-42 | 38-38.5 |
2″ | 49 | 52-54 | 50-51 |
3″ | 74-75 | 80-82 | 75.5-78 |
4″ | 99-100 | 104-106 | 101-102 |
5″ | 125 | 130-133 | 126-128 |
6″ | 150 | 154-156 | 151-153 |
8″ | 200 | 206-264 | 202-204 |
10″ | 250 | 260-264 | 252-256 |
12″ | 300 | 308-310 | 302-305 |
We have the above normal type but other dimensions can be customized .
4. Details of the air shaft :
5 . Why choose us?
(1) Adoping high power press machine to realize interference fit .
We are using a high power press machine which can produce 80T thrust to realize all the combination of spindle head and steel tube for the air shafts. Light type air shaft is with 0.03mm interference fit.Heavy type air shaft is with 0.06mm interference fit.While many factories knock it in with a big hammer,no quality and accuracy.
(2) Adopting hi-precision cold-drawn steel tube as the shaft body .
We adopt hi-precision cold-drawn steel tube as the shaft body.The thickness of this kind of tube is uniform so when the rubber balloon inside is inflated ,all key strips will stick out at same height .And it will greatly weaken centrifugal force of the whole air shaft when it is rotating and will keep a dynamic balance.
(3) Adopting whole long key bar and pagoda springs for key type air shafts .
We use the whole long key bar to form a good protective ring around the air shaft air chamber ,and we adopt the pagoda springs which can bear 300000 compression.The key bar is made of aluminum alloy.
(4) Adopting special equipment to connect air chamber and shaft head .
The connection mode between the air chamber and the shaft head is very important process,our company are using special equipment to realize it.Outside is buckled by siderosphere directly which can ensure good sealing performance and stability. Many air shafts produced by other suppliers , both ends are fastened by iron wire,this is easy to leak and is with unstable sealing performance.
1. How should I place the order?
For air shaft , please send us your drawing, or let us know your request .
2.What is the delivery time?
The delivery time is about 12 working days after 100% TT received in advance .
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