신라포장기계(주)

AIR SHAFT

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Parallel / Zig-Zag Lug Type

The lugs in these standard types are arranged in parallel or zig-zag. The large contact area holds the core firmly to allow high torque rotation.

The zig-zag type, with the lugs arranged continuously, is especially suitable for slitrewinders.

Leaf Type

The shaft as a whole expands and contracts, and is suitable for coreless or multiple-core (slitter,etc) applications. The torque is uniform across the face width (lower torque transmission than the parallel lug type).

Cantilever Type

The core can be removed with ease without lifting the shaft because the shaft is normally mounted on the converting machine.

The parallel, zig-zag, and leaf types can be used.

CFRP Shaft Type

The shaft is made of complex plastic materials reinforced by carbon fiber reinforced plastics (CFRP) and carbon fibers.These materials are ideal for super-lightweight airshafts having low moment of inertia and high rigidity.

The super-lightweight airshafts are easy to handle, improving operation efficiency (the shaft weight is approx. 1/5 taht of a steel shaft).

Cavity Shaft Type

The cavity shaft accepts web shafts of max.30 mm diameter, in case of core internal diameter of 3 inches. The shaft shall be fixed on web shaft, and insert into web core.

Air Adapter

The size of the existing airshafts is increased by mounting the air adapter without increasing the weight significantly.

The weight of a 3 "airshaft with 6" adapters is about one-half that of a 6 " air shaft (various sizes available on request).

Nylon Adapter

The adaptor is made of nylon materials. The weight decrease 20% against the former air adaptors.

Air Hanger

The air hanger is used to handle cylinders, etc.more efficiently and smoothy. It is inserted into a web roll placed upright. With air supplied, the serrated lugs bite firmly into the core allowing lift of the roll. The web roll surface is kept intact because the paper roll is not clamped for lifting..

Slide Chuck

The shaftless slide chuck reduces cost and improves work effiiciency. Instead of the conventional linear contact by taper cones, the slide chuck uses the surface contact for positive core clamping and torque transmission. The mechanical slide chuck requires no maintenance.

3",4",6",9",12"
(various sizes available on request)

Core-less Air Shaft (Leaf Type)

Web clumping method is applied on leaf type airshaft. Then, it is possible for the airshaft to make winding operation in core less web.

AS Carrier

The AS carrier is recommended for handling heavy rolls and shafts. The weight of the shaft is supported by the AS carrier. Shafts that were usually transported by several operators can now be transported by a single operator. An hydraulic oil pump or motor is used for lifting the table

Max.load : 150kg (hydraulic pump), 200kg (motor)
Shaft dia. : 75 to 180 mm
Min height : 150mm
Lift : 500m

Standard Type

The shafts minimize delivery time and cost for the simple construction as standard. The diameter 74 mm and the length 1000, 1100, 1200, 1300, 1400, or 1500 mm are prepared. The lugs are arranged in two directions of zigzags.

Please include the following data when inquiring:

1	Core internal diameter (dΦ)	5	Winding speed
2	Max. winding diameter	6	Max. tension
3	Max. roll weight	7	Dimensions L, L0 , L1, L2
4	Web width	8	Journal shape

NEWLONG Airshaft Dimensions

Shaft dimensions

Journal shape

Cantilever dimensions

Air hanger dimensions

* We can manufacture airshafts of virtually any size and specifications on request.
* We also supply: ● Rubbertube ● Air gun ● Valve port ● Air gauge ● Gear (including collar)

The NEWLONG precision airshafts are used in the unwinder and rewinders of presses, paper machines, plastic processing machines, slitters and bag making machines. The advantages of airshafts over mechanical shafts are

(1) finger-touch operation for ease of operation
(2) lightweight and simple construction
(3) quick core and roll change
(4) easy maintenance
(5) safety.

The NEWLONG precision airshafts are available in 3 types: tube, cylinder, and screw type. The cylinder type has an embedded piston, while the screw and cylinder types have a high precision eccentricity to the inner core diameter of web. The journal of all airshafts are heat-treated and then ground to ensure excellent wear resistance and precision.

Type	Cross Section	Structure	Features
TUBE TYPE PT		The lugs are held within the sahft O.D. by springs for easy insetion of the shaft into the web core. When air is injected, the rubber tube expands and the lugs are held firmly against the web core.	High torque and rotational speed are available with low air pressure. The web core will not slip.
SCREW TYPE PS		The lugs move as you move the slope core using the screw mechanism built into the journal shaft. The lugs are pushed to hold the web core as the slope core advances by turning the screw forwad with an impact wrench. The lugs return when the screw is turned in the reverse direction. The lugs are screwd on to the shaft for easy replacement.	A single shaft covers the 76 to 82mm web core I.D. Uniform lug stroke in circumferential direction. Suitable for high precision, torque and high-speed operation. Shaft can be inserted in a few seconds. The screws are specially heat-treated to reduce scratching and wear. The service life is about 3 times that of conventional types. Impact wrench inserting port is available through the journal and or on the cylinder.
CYLINDER TYPE PC		This is the same mechanism as the above screw type, but instead of the screw, air is injected to move the piston. The lugs return smoothly by the spring built into the journal shaft on the opposite side as you press the suction valve.	A single shaft covers the 76 to 82 mm web core I.D. Uniform lug stroken in circumferential direction. Air pressure is adjustable between 5 and 10kg/cm² by tension.