SPINNING AND PLYING

Spinning is the process of adding twist to sliver or drafted roving in order to create yarn.
In industrial textile production several different spinning methods are used, however ring spinning is still the most versatile method for spinning a wide range of fiber types with varying staple lengths.
The input roving is first drafted to the correct weight by a series of rollers, then twist is introduced by the action of a weighted traveller rotating in a ring around a spindle that is driven at a speed greater than that of the traveller.

Plying two or more strands of single-ply yarns together results in a stronger final yarn.
The singles are always twisted together in the opposite direction in which they were spun, creating a balanced yarn that does not coil around itself.

RING SPINNING FRAME AND PLYER

By partnering with one of the leading Italian manufacturers of ring spinning frames, Ramella is able to offer a compact version of a semi-worsted spinning and plying frame with 12, 24 or 36 spindles.
The compact design is ideal for laboratories and small commercial mills.
The spinning frame is characterized by a double drafting unit that allows perfect control of the input sliver, and the electronics were specifically designed for the needs of small commercial producers who often process small lots of different fiber types with various staple lengths. The spinning frame can be quickly and easily changed for the plying step, eliminating the need for a separate plying machine.
Our partner’s experience and attention to detail allows us to supply a state-of-the-art spinning frame that is both economical and easy-to-use.

DOUBLE DRAFTING UNIT

One of the main features of this spinning frame is the double drafting zone that allows perfect control of the fibers in order to produce a wide range of yarns, from lace-weight to bulky.
Two distinct drafting zones each feature a different fiber control system.
The upper unit uses barrel roller control while the bottom unit uses an apron cradle, insuring a smooth drafting action while maintaining fiber cohesion.
The draft arm is mechanically connected to the structure and can be released quickly and easily. It can also be adjusted in order to vary the roller pressure.

DRAFT CYLINDERS

The distance of the upper drafting zone is adjustable in order to accommodate fiber staple lengths from 6 to 20 cm.
The drafting cylinders are mounted on lubricated ball bearings, minimizing user maintenance.

The lower rollers are chemically treated to maintain cohesion while the specific knurl design insures an even release of the fibers as they are twisted.
The drive shafts are independently controlled by electric motors driven by inverters.

SPINDLES

The spindles use commercial-style tubes, which are more cost effective compared to wood bobbins.
This spindle system also allows a quick change of the tubes with the next leader yarn already in place for the next spinning run.

Each individual spindle is balanced for high speed spinning and is fitted with an independent brake, which allows the user to reconnect a break in the yarn without interrupting the spinning action of the other spindles.
The brake is applied directly with your foot, leaving both hands free to correct the yarn breakage. The foot brake also maximizes user safety because there is never a need for the operator’s hands to be near the high-speed spinning zone.

Spindle brake

Adjustable distance

vacuum nozzle

Spin finger technology

ELECTRONIC CONTROL WITH TOUCH SCREEN

Unlike older mechanical spinning frames, the Ramella spinning frame is equipped with a touch-screen computer panel with an integrated, user-friendly interface that simplifies yarn-count calculations and eliminates the need for the stop-and-weigh method.
Every machine action, including the operation of the vacuum system and the ring rail motion, is electronically controlled without the need for operator intervention.

The machine will even stop itself when the bobbin tubes are full.
In addition, the included software allows the user to save different program settings so that the most-used parameters can be easily reloaded for future runs.

RING RAIL

The ring rail is characterized by sintered metal rings with central lubrication, which allows the travelers to spin at high speed, and is electronically controlled to perfectly position the yarn on the tube in order to avoid breakages in the subsequent steps.

Additionally, pneumatic control of both the thread guide and the movement of the bobbin tube reduces the risk of yarn breakage.

THE RAMELLA DIFFERENCE

Decades of experience, attention to detail, and a design specifically tailored for small commercial production make this spinning frame the right machine to achieve maximum quality and productivity.

The Ramella spinning frame offers many features that others do not, including:

• A double drafting area for maximum control and quality.
• An economical tube bobbin system.
• A spin finger to minimize tension during spinning and reduce breakages.
• Touch screen control, which simplifies calculations and machine operation.
• Multiple drive belts to prevent the loss of torsion in the central spindles.
• A compact design ideal for small commercial mills and laboratories.
• Low maintenance with spare parts readily available if needed.

CENTRALIZED VACUUM SYSTEM

The spinning frame is equipped with a centralized vacuum system.
Each spindle is equipped with a vacuum nozzle that can be adjusted at varying heights and depths as needed in order to draw off the sliver feed in case of yarn breakage during spinning.
The vacuum compartment is easily accessed to allow quick filter cleaning without having to replace bags or remove the filters themselves, and the vacuum system is integrated into the spinning frame, which greatly reduces the noise and the overall machine footprint compared to other spinning systems.

SPINDLES DRIVE

Most other spinning frames utilize only a single belt to operate all of the spindles simultaneously, which can result in belt slippage and torque loss, reducing the quality of the final yarn.
On the Ramella spinning frame, the parallel belt and pulley systems each operate only two spindles for every drive belt, eliminating the risk of torque loss during spinning.
The belts are tensioned independently on balanced pulleys that are driven by an electronically controlled motor, which allows you to reach very high spin speeds in order to maximize production while also maintaining a high quality end product.

PLYER

After spinning the single-ply yarn, a movable bobbin rack is positioned in front of the machine in order to create the plied yarn.
Each spun single is drawn through a spring system that applies the right tension in order to avoid imperfections in the final plied yarn.

Because of the separate plying rack, no mechanical changes are required in order to switch from spinning to plying.
In addition, the direction of rotation and the spindle speed for plying are automatically adjusted via the electronic control panel, eliminating plying mistakes due to miscalculations or user error.

DRIVEN CREEL

A motor-driven creel guides the drafted sliver into the spinning zone, reducing tension on the sliver, and, therefore, also reducing the chance of sliver breakage, especially for low cohesion fibers, such as alpaca.

In addition, a double row of creel rollers permits a more compact arrangement of the coiler cans, minimizing the overall dimensions.

PRODUCT SPECIFICATIONS

Electric specifications:

Three phase 400V 50/60Hz
Installed power (12 and 24 spindles): 7.9 kW

Single phase 240V 50/60Hz
Installed power (12 spindles): 5.9 kW
Installed power (24 spindles): 7.9 kW

Size (length x width x height):

Spinning frame (12 spindles): 3370 mm x 3750 mm x 2000 mm (133'' x 148'' x 79'')
Spinning frame (24 spindles): 4770 mm x 3750 mm x 2000 mm (188'' x 148'' x 79'')

Download layout (pdf version)

SOME SAMPLES OF THE FINAL PRODUCTS

Final product sample