FIELD OF THE INVENTION

The present invention relates to a device for spinning silk yarn. More particularly, the invention is directed to a simple, efficient and low cost spinning machine adapted to spinning silk yarn either manually or by an electrical motor, favouring consistent improved quality of silk yarn avoiding heating and resultant deterioration of silk yarn. The spinning machine according to the present invention would thus provide cost effective solution to produce quality silk yarn at faster speed in an efficient manner favouring wide scale application in silk fiber spinning mills.

BACKGROUND ART It is well known that the art of Silk yarn extraction from silk Worm cocoons that such cocoons are the protective shell naturally prepared by the silkworm to overcome adverse weather conditions to live for a period of more than one year and are used as raw materials input for producing silk yarn. It is made of a single continuous silken thread comprising of a protein, fibroin in the core, serecine in the outer layer and some gummy substances.

The Process of spinning of cocoons involves dragging out a bunch of filaments from a single cocoon, comprising inferior grade, or cut cocoons or pierced cocoons where the continuity of the single filament is broken, and twisted continuously till all the filaments are extracted out of cocoons, to make spun yarns. When one cocoon is finished, another is added to the filaments to make the yarn continuous. A spun yarn producer keep the machine running by feeding the bunch of filaments into the machine, regulate the feeding rate so as to determining the uniformity in thickness of yarn. The machine inserts twists in the filaments and winds the twisted yarns in the bobbin. This continuous winding of yarns, drags/pulls bunch of filaments from the cocoon continuously.

There are various ways of inserting twist in the filament bunch. For this different machines use different mechanisms to perform twisting of filaments to desired degrees, hi earlier days, Takli, a term used for a twisting wheel, earthen pitcher and palm etc were used to insert twist in filaments, hi machine of the prior art, Motorized Spinning Machine (MSM), high speed ring and traveler is used to insert twist. It has been experienced in the art that the High speed ring traveler generates friction and heat, which deteriorate the quality of yarn. Also, the manner of regulation of feeding and spinning in existing devices were not so precise. The manual as well as electrical drive for the spinning device/machine could not be conveniently and cost effectively implemented in one embodiment.

A number of attempts have been made in the recent years to developing an improved yet simple spinning machines/devices for production of thread/silk yarns to solve problems experienced in the related art.

GB371232 is a prior patent that talks about a hand-spinning machine in which the three operations such as (1) initial twisting and drawing out of the thread (2) the spinning of the thread and (3) the guiding and winding up of the spun thread or yarn on to the reel are simultaneously carried out, resulting in uniform spun yarn thereby giving pre-arranged number of turns or twists.

Thus the machine involved a complex arrangement involving too many components for achieving desired spinning and feed rate. Moreover, such device is manually driven having limitation on speed and efficiency of operation.

865/CAL/1999 is a prior patent application that talks about a device and process for winding the spun yarn on to the bobbin holder. The device comprises winding stations and each winding station features a separate device for the separation of the spinning thread residue from the yarn package and a suction device for removal of the separated spinning thread residue. The pot spinning device contains media for converting the relative axial movement of the thread guide tube and bobbin holder into the movement of the blade. The process for winding the spun yarn onto the bobbin holder from the spun yarn comprises introducing the bobbin holder into the spinning centrifuge, the thread running between the mouth of the thread guide and the inner wall of the spinning centrifuge is taken up at the end of the bobbin holder.

Thus this prior art device and process involved a number of complex subsystems, each contributing in a different manner to spinning yarn on bobbin. The system is expensive, complex as well as do not provide a simple set up for manual operation with efficiency. 1472/CHE/2005 is a prior patent application wherein the invention relates to a reeling and twisting machine for tasar, muga and mulbery cocoons to achieve high quality twisted silk yarn. The reeling cum twisting machine comprises of a metal frame which houses metal fly wheel to drive the plurality of spindles. The motion to the spindles is imparted through split pedals, levers and flywheel or through electric motor and pulleys. The reeling basin is fitted in front of the machine for taking out the silk filament from silk coccon which is placed in water contained in the reeling basin. A jetteboutte is positioned centrally above the reeling basin to impart light initial twist to the filament and to form yarn. A synthetic cot roller with delivery roller helps in easy feeding of the yarn into the bobbins without overlapping. Plurality of lappets with hinge are provided for delivery of yarn into plurality of bobbins and also helps in fitting and removal of bobbins.

The present invention does not incorporate features like cot roller, pulley arrangement, lappets as that of the cited patent and wherein a plyer is connected parallel to the bobbin to insert twist to the yarn and a Feed Adjuster that regulates the difference in rotation between the plyer and the bobbin, thus regulating the twist in the yarn. The present device is thus simple and cost effective while still providing required speed regulation and quality yarn delivery consistently.

1490/DEL/2008 disclosed an invention that talks about a device for a ring spinning or twisting machine having a thread-guiding ring on which a thread-guiding element is provided for twisting and diverting a running thread. A retaining unit on which the thread-guiding ring is positioned such that it can rotate around a given axis of rotation. A means of force generation for applying axial forces to the thread-guiding ring as a result of which a first sliding segment formed on the thread-guiding ring is pushed against a corresponding second sliding segment formed on the retaining unit to provide a bearing for the thread-guiding ring. Further, the device comprises a pair of magnetic rings to generate axial forces by their repulsion or attraction.

This prior art patent application relates to an invention wherein a device for ring spinning and twisting wherein a thread guiding ring is having features like means for generating force, magnetic ring contributing to twisting and diverting a running thread making the system complex and expensive. In the device of the present invention the bunch of filaments passes through the Centre Thread Guide and then through a Moti Spring and finally winded into the bobbin in a simple and cost effective manner.

There has thus been a need in the art to developing a simple, efficient and low cost spinning machine that is provided by way of the device according to present invention adapted to spinning silk yarn either manually or by an electrical motor, so that spun silk yarn is produced and delivered with consistently good quality at less cost and would thus overcome the disadvantages and limitations of the prior art.

OBJECTS OF THE INVENTION The basic object of the present invention is thus directed to providing a device for spinning tasar and eri silk yarns which is cost effective, simple and highly effect device which can be operated either manually or by an electric motor to produce quality silk yarns.

Another object of the present invention is directed to developing a spinning machine for simple and cost effective production of spun silk yarn wherein plyer is used to insert twist in silk fiber.

A further object of the present invention is directed to developing a silk yarn spinning machine wherein the bunch of filaments passes through a centre-thread-guide and a moti-spring to finally winded into the bobbin and the inner wall of said center thread guide and moti spring are made of china clay in order to have minimum friction.

A further object of the present invention is directed to developing a silk yarn spinning machine wherein the difference in the rotation of plyer and bobbin creates required twist in the bunch of filament and makes the yarn and wherein the plyer connected to balance axle rotates at higher speed than the bobbin.

A still further object of the present invention is directed to developing a simple and cost effective silk yarn spinning machine wherein a feed adjuster regulates the difference in rotation between the plyer and the bobbin and thus regulates the twist in the yarn. A further object of the present invention is directed to developing a silk yarn spinning machine wherein the drive power is provided to the balance axle by suitable motor pulley with belt drive arrangement.

A further object of the present invention is directed to developing a silk yarn spinning machine wherein fly wheel gives momentum for smooth rotation which is run by paddle.

A further object of the present invention is directed to developing a silk yarn spinning machine wherein a ball catcher helps to transmit power from the paddle to the fly wheel connected with crank and connecting rod assembly.

A further object of the present invention is directed to developing a silk yarn spinning machine wherein the supply of power to the drive motor is electric or from storage cell recharged by solar photovoltaic cell and wherein an accelerator/fan regulator fixes the maximum speed of the motor while the machine is in operation.

A further object of the present invention is directed to developing a silk yarn spinning machine wherein to operate the device by electric supply or to run by paddle, simple changeover arrangement is provide such that the operator need to change the round belt only.

SUMMARY OF THE INVENTION

Thus according to the basic aspect of the present invention there is provided a spinning machine for tasar or eri silk yarn adapted to be operated manually and/or by an electrical motor, comprising a plyer used to insert twist in bunch of silk filaments; a center thread guide and moti spring through which the bunch of silk filaments passes and twisted by plyer to finally being winded on bobbin and adapted such that difference in the rotation(RPM) of the plyer and that of the bobbin creates twist in the bunch of filaments to make the yarns; a feed adjuster regulating the difference in rotation between the plyer and the bobbin and thus regulating the twist in the yarn; said controlled rotational motion provided to the plyer and the bobbin by either electrical motor or run by Paddle.

In the above spinning machine for silk yarn the plyer is connected directly with a balance axle which rotates at a higher speed than the bobbin as its rotation is reduced /regulated by feed adjuster.

Also, in the above spinning machine for silk yarn a balance wheel maintains the balance and the RPM of the plyer.

The power to the machine is supplied through electric motor. Preferably, the power is transmitted from the electric motor by a round belt, connecting the motor pulley and the pulley attached with the balance axle.

A storage cell is provided as alternate power source adapted to be recharged by solar photovoltaic cells / through grid power.

The electric wire, connecting the motor and the supply source (electric or storage) passes through an accelerator, where there is a knob (fan regulator) that fixes the maximum speed of the motor;

According to an aspect the accelerator regulates the speed while the machine is in operation.

According to an aspect a flywheel gives momentum for smooth rotation when the machine is run by paddle. The flywheel is connected with flywheel axle which holds the flywheel.

According to another aspect a connecting rod is provided to connect the flywheel and the paddle connecting rod.

According to yet another aspect a fitment rod connects paddle and the flywheel Connecting rod. According to a further aspect the ball catcher helps to transmit power from the paddle to the flywheel.

In the spinning machine for silk yarn the same is further adapted such that the paddle adjuster adjusts the fixation of the paddle with the frame.

Importantly, in order to select the spinning machine to operate by electric motor or to run by paddle, the operator needs to change the round belt only.

The details of the invention its objects and advantages are explained hereunder in greater detail in relation to non-limiting exemplary illustrations as per the following accompanying figures:

BRIEF DESCRIPTION OF THE ACOMPANYING DRAWINGS

Figure 1: is the schematic illustration of the spinning machine for spun silk yarn according to the present invention, adapted to be driven manually or by electric motor.

DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING FIGURE

The present invention is directed to a simple cost effective and efficient spinning machine for spinning silk yarn and deliver quality silk yarn consistently without any degradation of quality due to undesired heat generation and the like, during the spinning/winding process for the silk yarns.

Reference is first invited to the accompanying Figure 1 that schematically illustrates an embodiment of the spinning machine according to the invention for spinning silk yarn being operated either manually or by electrical motor.

It shown in the accompanying Figure 1, the device comprising a cocoon tray (1) used to keep the treated cocoons from where the bunch of silk filaments are dragged out by the device. A water pot (3) is used to keep the water required during spinning. The cocoon tray (1), the water pot (3) and other equipments are mounted on a desk (2) of suitable size and supported on a MS frame (15) of suitable height. A center thread guide (4) is selectively positioned on the desk so that the bunch of silk filaments passes through the guide and then through a moti spring (9) are disposed to the plyer (8) for providing desired twist and finally wound on the bobbin (5). The plyer (8) is used to insert desired twist to the filaments to form spun yarn before being wound on bobbin (5). The inner walls of the centre thread guide (4) and the moti springs (9) are made of china clay in order to have minimum friction to ensure superior yarn quality. When the device is in operation, the difference in rotation (RPM) between the plyer (8) fitted parallel to the bobbin (5), horizontal to the ground and that of the bobbin (5) creates twist in the bunch of filaments and makes the yarn. A feed adjuster (19) regulates the difference in rotation between the plyer (8) and the bobbin (5), thus regulates the twist in the yarn. The plyer (8) is connected directly to a balance axle (11) which rotates at higher speed than the Bobbin (5), as its rotation is reduced/regulated by feed adjuster (19). A balance wheel (10) mounted on the balance axle (11) supported on frame (15) by means of bearing with cover (12) and driven by electric motor (20) maintains the balance and the RPM of the plyer (8). Power is transmitted from the motor (20) by a round belt (13), connecting the motor pulley (14) and the pulley attached to the balance axle (11). The balance wheel (10) maintains the balance and the RPM of the plyer (8).

When the device is run manually by paddle (25), a fly wheel (17) mounted provides momentum for smooth rotation. The fly wheel (18) is connected with fly wheel axle (17), which holds the fly wheel and supported on Frame (15) with bearing and MS cover (16). A connecting rod connects (21) the fly wheel and the paddle crank. A fitment rod (23) connects the paddle (25) to the fly wheel connecting rod (21). A ball catcher (22) helps to transmit power from the paddle (25) to the fly wheel (18) for manual driving of the spinning machine. A paddle adjuster (26) adjusts the fixation of the paddle (25) with the frame (15):

The spinning machine is also adapted to be powered by an electrical motor (20) of suitable ratings. The motor receives electrical power from external supply source by means of electric wire (6) and a three pin socket (7). Alternatively, power is provided from a storage cell which is recharged by solar photovoltaic cells. The supply power to motor passes through an accelerator (24) where there is a knob (similar to fan regulator) that fixes the maximum speed of the motor (20). The accelerator (24) helps regulating the speed while the machine is in operation. Thus the spinning machine according to the present invention is adapted to operate either by electric supply or the device is run by paddle operation. To select any of such option, the operator needs to change the round belt only to connect to corresponding drive system.

It is thus possible by way of the present invention to developing a device to spun silk yarn which is simple, efficient and low cost to thereby produce high quality silk yarn consistently and reliably free of any deterioration of silk quality. Advantageously, the silk yarn spinning machine according to the present invention is adapted to be operated by either electric motor or by simple manual paddle operation while ensuring equal speed and efficiency of operation. Importantly, the center thread guide and the moti spring through which passes before being twisted is made of china clay in order to have minimum friction to ensure spun yarn quality avoiding undesired heating. The machine also ensure providing desired twist to the bunch of silk filaments extracted from processed cocoons involving a plyer and the differential speed of rotation of the plyer and the bobbin, said differential rotational speed regulated by a feed adjuster, favour creating the required twists in filaments to make desired quality of spun yarn in a reliable and cost effective manner.