Key type shaft

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Key type shaft

Publish time 2020-12-28 15:09

价格范围：¥499-1299

1. Principle:
Strip shaped slot holes are regularly distributed on the surface of the gas expansion shaft, and the key strip is fixed on the inner pressing plate through the slot. When there is no compressed air, the internal spring force will press the inner pressing plate on the surface of the air bag, and the key strip is flush with the surface of the shaft. At this time, install the paper tube or other tubes, and then inject compressed air into the axial air bag to expand the air bag, jack up the inner pressing plate in the tube, and fix the paper tube or other tubes. With the rotation of the air expansion shaft, the film, sheet, fiber, etc. can be wound on the paper On a pipe or other pipe.
characteristic:
1.1 wide range of applications: as an independent design part, the air expansion shaft ranges from 1 inch to 12 inches, and the length, size and ends of the shaft head are determined by the actual needs of customers. This air expansion shaft can be applied to the equipment such as striped printing, rewinding, coating, laminating, bag making, papermaking and other related central coiling machines.
1.2. Economical and efficient: the shaft is designed for practical work and can be applied to all kinds of coiled pipes
1.3. Long service life and simple maintenance: Although the inflatable shaft is a mechanical accessory, each part in its own structure has a fixed specification. The surface of the parts is generally treated with oxidation / chromium plating / nickel plating to increase the surface wear resistance and reduce the friction force. The parts can be interchanged to facilitate maintenance.
1.4 single accessories: the air expansion shaft is a single part of the winding and unwinding machine. Each part in its structure has a fixed size, which can be decomposed and combined to make the maintenance convenient, durable and durable
1.5 large bearing capacity: the air expansion shaft can be designed according to the actual model, using high-quality materials to increase the bearing capacity. Aluminum alloy material can be used for light weight, and steel material can be used for bearing more than 1 ton.
1.6. Short operation time: it only takes 2 seconds to separate and place the winding tube. It is simple, convenient, safe and applicable to place the winding tube. All machines and equipment used for winding and unwinding can be applied to the inflatable shaft.
1.7. The key type air expansion shaft expands a single key bar, and the fulcrum diffuses to each key bar to balance the force. It is suitable for mechanical winding of heavy load items.

2. Common specifications:

Key bar type gas expansion shaft Specifications	Diameter before inflation D1（mm）	Outer diameter after inflation D2（mm）	Applicable inner diameter of core barrel （mm）	Circle key bar bisection number
1inch	Ø24.8	Ø28	Ø25~Ø26	3Bisection
1.5inch	Ø37	Ø42	Ø38~Ø39	3Bisection
2inch	Ø49	Ø54	Ø50~Ø51	4Bisection
3inch	Ø74	Ø82	Ø75~Ø77	4Bisection/6Bisection
6inch	Ø150	Ø156	Ø151~Ø153	10Bisection
10inch	Ø250	Ø260	Ø252~Ø255	12Bisection
12inch	Ø300	Ø310	Ø302~Ø305	16Bisection

3. Structure description:

2.1 the material of key strip is divided into carbon steel, aluminum alloy, nylon, rubber, etc., which can be selected according to the use requirements.
2.2 the material of shaft body is divided into carbon steel, aluminum alloy, carbon fiber, etc., and it is selected according to the bearing requirements.
2.3 shaft head structure at both ends: customized processing according to different equipment needs, common flange, optical shaft, key shaft, square head, triangle head, cone head, internal tooth head, etc.
2.4 types of gas filling nozzle: it is divided into two kinds of structure: sharp bell mouth, G1 / 4, G1 / 8 and G1 / 16 specifications for each size, and ordinary type and extended type for each length.
2.5 distribution of the number of filling nozzles: single nozzle / multiple nozzles can be selected, which are distributed in the outer circle of shaft / outer circle of shaft head / end face of shaft head.

4. Explosion view: