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Pin drafter

PIN DRAFTER - GILLING MACHINE


The carder begins the process of aligning the fibers in a parallel arrangement, but pin drafting completes this process.
In addition, drafting blends together different fiber types or colors, creates a uniform sliver to produce an even yarn without thick and thin defects, and can be used to produce a sliver of any desired thickness.
Drafting considerably influences the quality of the final product, as it is the final step in which any sliver irregularities are corrected prior to spinning.

Whereas a drawframe is traditionally used in the straightening and parallelizing of cotton and other short fibers, a gill box pin drafter is used for processing wool, alpaca, and other long staple fibers.


CHAIN DRIVEN GILLING MACHINE Gilling machine

To complete the semi worsted line Ramella offers a chain driven, gill box pin drafter.

Compared with the screw driven gill box our machinery allows a much higher production (up to 60 m/min - 200 ft/min output speed), very low noise level, lower energy consumption and easier maintenance.


MACHINE PARTS Machine parts

The operation of the Ramella pin drafter is quite simple:
The cans containing the carded sliver are placed below the creel where rotating rollers facilitate the movement of the slivers from the containers and into the entrance of the gill box.
The first roller unit brings together several slivers and introduces them into the pinfield without slippage.
The pins on the faller bars and the central group of 3 rollers perform the combing and drafting of the slivers. This is the heart of the machine in which the main operation is performed.
In the final part the last roller unit assists in delivering the drafted sliver to the can coiler.




INDEPENDENT MOTORS AND ELECTRONIC DRAFTING CONTROL Pin drafter motors

The pin drafter is equipped with two independent motors controlled by inverters allowing both the draft ratio and the drafting speed to be changed quickly and easily using a digital display input and the twist of a dial.
The machine is capable of achieving draft ratios between 1 to 10 in 0.1 increments.
No calculations are necessary as the selected draft ratio automatically sets the pin field and roller speeds to the correct values for obtaining the desired result.

In addition, the speed of the can coiler can be easily adjusted during the drafting run in order to synchronize the coiling speed with the output speed of the pin drafter.
The control system allows all of the parameters to be changed both during machine standstill and while the machine is running.


CHAIN DRIVEN PIN FIELD Chain driven pin field

Following industry standards the drafting pin field consists of one upper and one lower unit, each with 72 faller bars, driven by synchronous chains.
The Ramella pin drafter has a very large pin field (25 cm - 10") to insure perfect control of even the longest staple fibers.
The geometry of the pin field allows for a gradual entry of the fiber into the combing pins which minimizes breakage and reduces irregularities.
The drafting head structure is entirely made of steel to ensure strength and durability.
Furthermore, the faller bars are constructed of two separate parts, allowing replacement of just the pin strip without also having to purchase the metal holder, which results in a cost savings of 70% over the purchase of a complete faller bar unit.


TRANSPARENT SAFETY COVER Safety device

The Ramella pin drafter is protected by a top cover that provides quick access to the work area.
During machine operation a safety switch prevents the lifting of the cover, and the transparent polycarbonate windows allow the operator to easily view the machine operations inside.
The protective cover is supported by two air springs that allow the operator to lift it with minimal effort.

In addition to the upper cover, the Ramella drafater is fully protected by side plates, ensuring the safety of the operator.


Pin drafter from side THE RAMELLA DIFFERENCE

The solid structure, attention to detail, and quality at an affordable price make the Ramella gill box drafter the ideal tool to regularize and draft the fibers.
Unlike the second hand pin drafters driven by screw mechanisms the Ramella gill box drafter offers:

A very high speed.
Maximum flexibility with the electronic control of the motors.
Less noise than the screw system.
Greater economy of operation and maintenance.

Compared to other models on the market the Ramella drafter offers:

A machine specifically designed for small commercial mills and laboratories.
A low noise, chain driven pin field.
A driven creel to reduce sliver breakage.
A solid structure designed to last.



DRIVEN CREEL Driven creel

The Ramella gill box drafter is equipped with a driven creel which, in the standard version, allows the positioning of 8 cans.
The creel roller movement is synchronized with the machine and is safe and quiet.

The Ramella rotating creel cylinders are superior to fixed creels because they allow even the most delicate slivers to be transported into the machine without breakage.
The creel structure is made of aluminum and can be designed according to the type and size of cans used.


CONTROL PHOTOCELL, INDEPENDENT SUCTION Photocell

The Ramella drafter is equipped with an integrated electrical display from which it is possible to set all of the drafting parameters.
The on-off button panel is adjacent to the electrical display, both of which are conveniently placed on the front side of the machine.
The machine is also equipped with a photocell that detects the presence of the sliver and automatically stops the machine in case of breakage.

The top cover is protected by an interlock which ensures maximum user safety.
A vacuum system helps to clean the comb head during operation. This vacuum system is very quiet, however, it can be placed in a different room to reduce noise if desired.


SOLID STRUCTURE Machine structure

Like all Ramella machines, our gillbox drafter is characterized by a solid structure designed to last.
The comb head and roller units are made of machined steel and the surfaces are protected by phosphating.
The supporting structure of the draw frame and the creel are made of anodized aluminum, and the remaining protective parts are made of powder-coated steel.

The functional parts are machined in our manufacturing facility so as to ensure the precision and accuracy of the movements.


PRODUCT SPECIFICATIONS Product specifications

Electric specifications:
Power consumption: 5.0 kW + 0.4 kW (Can coiler)
Single phase 230V 50/60Hz (customizable)

Size (length x width x height):

Pin drafter: 1110 mm x 1660 mm x 2100 mm (43'' x 65'' x 83'')

Creel: 2300 mm x 1470 mm x 1520 mm (90'' x 58'' x 60'')

Download layout - Pin drafter (pdf version)




DEMONSTRATION VIDEO

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