Briefly Description of Different Parts of Long Chain Beamer?

Briefly Description of Different Parts:

Accumulator :

An accumulator is a device which allows the rope to be accumulated in a controlled manner at the time of unwind the section beam on the Long Chain Beamer in order to find out and to repair a broken end. The accumulator is an important component on a Long Chain Beamer, as there is no stop motion device in the re-beamer and the operator observes the yarn sheet whether there is any broken end. Accumulator may be of different types, such as:

• Open Sheet Accumulator
• Offset Roll Rope Accumulator
• Deep Groove Pulley Rope Accumulator

Beater Bar and Comb :

After the Accumulator the rope returns to the Tension Stand. There is a Beater Bar located at the top of the Tension Stand which is round four or five sided in shape. It is at this point where the yarn rope begins to be opened into a yarn sheet. The function of the Beater Bar is to apply sufficient tension, friction to the rope, assisting in the opening or spreading the yarn and to separate the ends without any damage to the yarn. After the Beater Bar the rope passes through a comb located on the Long Chain Beamer, which separates individual yarn ends and keeps them parallel to one another. From the comb, the warp yarns are guided onto a flanged section beam.

In the Long Chain Beamer, the section beam is supported and driven by an electric motor. The electric motor may be of either DC motor or AC inverter type drives spindles spindles which support the section beams. The section beam wind the yarn sheet onto it. Generally, the operator run the machines by depressing a Foot Pedal. As long as the Foot Pedal is depressed, the machines continues to run and whenever the Foot Pedal is released, the machines stops.

Tension Stand :

When the ropes come down from the guiding device, it passes through tensioning Stand rollers (Fig.). The purpose of the Tension rollers is to established necessary warp tension to the rope and help in further separation of the ropes before going through a comb. If no tension is applied to the rope, then the rope have a tendency to resist opening up into the sheet form. Ultimately each in the rope will start separating directly at the comb located at the Long Chain Beamer. This may leads to rope damage.
The Tension Stand is approximately 4-feet high and consists of two tension drums, each approximately 14-inches in diameter and 14 inches face length. These rolls are fitted one over the other.

Some machinery manufacturer incorporates an AC Vector motor and drive is used to create tension in the rope instead of a pneumatic or EDDY current brake. This provides considerable energy saving. As the motor is operated in a regeneration mode, it providing power that can be consumed in the beamer head.

The rope from the tension stand passes through an Accumulator.

Stop Motions :

In most of the LCB machines not incorporated with any automatic stop machines. The eyes of the operator work to detect the end breakages. However it depends on the skills of the operators.

This manual system of detection of end breakages is not a reliable system of detection of end breakages in any Beaming operations. Some machinery manufacturer incorporated various stop motions in re-beaming process in order to detect the end breakages in LCB.