CN103122508B - Secondary twisting spinning method and device for spinning frame - Google Patents

Abstract

A secondary twisting spinning method of a spinning frame. On the output side of the front roller of the spinning frame, a group of front rollers capable of intermittently clamping and controlling the fiber strands are arranged. The fiber strands output from the front rollers are passed through the front rollers. The roller and the front roller are clamped by two front and rear jaws, and the secondary twisting is performed at the front roller jaw and the front roller jaw.

Description

Secondary twisting spinning method and device for spinning frame

technical field

The invention belongs to the field of spinning and forming processing, and relates to a ring spinning method and a device suitable for the method.

Background technique

The principle of spun ring spinning is: on the ring spinning machine, corresponding to the same spindle position, a group of rovings are fed from the rear roller of the drafting mechanism, and are drawn by the rear roller, middle roller and front roller of the drafting mechanism. , the drafted fiber strands output from the front roller are twisted once and wound on the bobbin under the rotation of the spindle. The yarn made by this method has poor tenacity under stress.

Contents of the invention

An object of the present invention is to provide a secondary twist spinning method for spinning frame, which can reduce the stress generated by the twisting of fibers in the yarn body.

Another object of the present invention is to provide a device for realizing secondary twist spinning of spinning frame.

A secondary twisting spinning method of a spinning frame. A roving fiber strip is fed into the drafting mechanism of the spinning frame, drafted by the middle roller and the front roller, and the fiber strand is output from the front roller, and then the fiber strand passes through the front Roller, the front roller clamps the fiber strands intermittently, driven by the rotating spindle, the fiber strands are twisted into yarn twice at the jaws of the front roller and the jaws of the front roller , or feed a roving fiber strip into the drafting mechanism of the spinning frame, and draft it through the middle roller and the front roller. The setting roller clamps the fiber strands intermittently, driven by the rotating spindle, the fiber strands are twisted into yarn twice at the jaws of the yarn delivery roller and the jaws of the front roller.

The difference between the method of the present invention and the existing spinning is that the fiber strands output from the front roller or yarn drawing roller are then clamped by the front roller jaws, and then separated by the front roller or yarn drawing roller jaws and the front roller jaws. The twisting of the fiber strands is completed for the second time. The clamping effect of the front roller on the fiber strands is intermittent. When the front roller does not clamp the fiber strands, the rotating spindle drives the twists generated by the rotation of the traveler, which is conducted through the yarn body and passes over the front rollers to the front roller. Roller or yarn delivery roller nip, the fiber strands between the front roller or yarn delivery roller and the front roller produce twists, when the front roller clamps the fiber strands, the rotating spindle drives the traveler to rotate to produce twists , through the yarn body to the front roller nip, the fiber strands between the front roller and the front roller or the yarn delivery roller, with the rotation of the front roller or the yarn delivery roller and the front roller, the twist is reduced, and in itself Under the action of the torque generated by the residual twist, the fibers in the twisting triangle area are relaxed and rearranged, and the stress of the fibers in the yarn body due to torsion is reduced.

The clamping effect of the front roller on the fiber strands is intermittent, and the intermittent opening and closing of the jaws of the front roller is realized by changing the shape of the cylindrical surface of the front roller and the bottom roller, or by mechanical, spring, The electromagnetic joint control method makes the upper and lower rollers produce continuous opening and closing cycle actions, and realizes intermittent clamping control of fiber strands.

There are two types of front roller transmission: bottom roller transmission and top roller transmission. The transmission source of the front bottom roller transmission comes from the bottom roller shaft of the front roller or from the servo motor, and the transmission source of the front top roller transmission comes from the top roller of the front roller. , the surface rotation speed of the front roller is less than or equal to the surface rotation speed of the front roller.

Another object of the present invention is to provide a device for realizing the secondary twist spinning of the spinning frame, which is composed of the drafting mechanism and the front roller of the spinning frame. The difference between it and the conventional spinning frame is that the front roller of the spinning frame outputs On the side, there is a group of front rollers that can produce intermittent clamping control on the fiber strands. The front rollers are composed of front top rollers and front bottom rollers. The front top rollers, front bottom rollers At least one of the rollers is cylindrical, and at least one surface of the cylindrical front top roller and front bottom roller has grooves.

The front roller jaws control the intermittent clamping of the fiber strands, and there are many structural forms of the roller mechanism to realize the intermittent clamping method;

Preferably, the rollers and the rollers form the front rollers, and the rollers and the guide plates or conduits form the front rollers.

The front roller and the roller constitute the front roller. The front roller is composed of the front bottom roller and the front top roller. The front bottom roller is a steel part, and the front top roller is a rubber roller. Driven, or driven by a servo motor, the cylindrical surface of the front top roller or the front bottom roller has at least one groove along the circumference at the yarn path or the cylindrical surface of the front top and bottom rollers has at least one groove along the circumference, And when the front roller rotates, the grooves of the front upper and lower rollers correspond to form a groove mouth, and the groove mouth is located on the connecting line between the yarn guide hook and the jaw of the front roller.

The roller and the guide plate constitute the front roller. The front roller is composed of a guide plate, a guide ring, and a front top roller. The guide plate is below it, and the guide ring is set on the guide plate. The guide plate is non-circular, and the guide ring is a flexible ferrule. Set on the guide plate, the front top roller is a rubber roller, the front top roller is driven by the front roller top roller, the front top roller has a cylindrical surface, and there is at least one groove along the circumference, and the front top roller is pressed on the guide plate. On the guide ring, when the groove of the front top roller contacts the guide ring on the guide plate, a groove opening is formed, and the groove opening is located on the connection line between the yarn guide hook and the jaw of the front roller. guide circle.

The roller and the yarn guide tube constitute the front roller, and the front roller is composed of a yarn guide shaft, a yarn guide tube, and a front top roller. The yarn guide tube is looped on the yarn guide shaft, and the front top roller is a rubber roller. The front top roller is driven by the top roller of the front roller. The cylindrical surface of the front top roller has at least one groove along the circumference. The front top roller presses on the yarn guide tube and drives the yarn guide tube through friction.

The groove on the cylindrical surface of the front top roller or the front bottom roller is located at the yarn leading position of the roller jaw, and the width of the groove is less than the length of the roller cylinder.

The beneficial effect that the present invention realizes:

In order to make the spun yarn have a certain strength, the spun yarn must be given a certain twist. On the conventional spinning frame, the spun yarn is completed at the front roller nip at one time. The step is completed, which is beneficial to the homeopathic arrangement of fibers in the yarn body, reduces the internal stress, and reduces the torque generated by the single yarn twist after yarn forming.

Description of drawings

Fig. 1 is the schematic diagram of a kind of spinning frame secondary twist spinning method and device of the present invention;

Fig. 2 is a schematic diagram of another embodiment of a spinning frame secondary twist spinning method and device of the present invention;

Fig. 3 is the schematic diagram that the present invention is formed front roller structure by top and bottom roller;

Fig. 4 is the schematic diagram that the present invention constitutes another structure of front roller by top and bottom roller;

Fig. 5 is a schematic diagram of the structure of the front roller jaw formed by the roller and the guide plate of the present invention;

Fig. 6 is a schematic diagram of the structure of the front roller jaw formed by the roller and the conduit in the present invention;

Fig. 7 is a schematic front view of the groove of the grooved top roller of the present invention.

Detailed ways

The technical solution of the present invention is described in detail below. The embodiment of the present invention is only for illustrating the specific method, and the scale of the method is not limited by the embodiment.

Embodiment one

As shown in Figure 1, a roving fiber sliver L is fed from the rear roller 1 of the drafting mechanism of the spinning frame, drafted by the middle roller 2 and the front roller 3, and the fiber strand output from the front roller 3 passes through a front Roller 4 and yarn guide hook 5 are twisted into yarn with the rotation of the traveler 6 driven by the rotation of the spindle. The two front and rear jaws of the set roller are clamped, and the twisting of the fiber strands is completed at the front and rear jaws of the front roller respectively.

Embodiment two

As shown in Figure 2, a roving fiber sliver L is fed from the back roller 1 of the drafting mechanism of the spinning frame, drafted by the middle roller 2 and the front roller 3, and the fiber strands output from the front roller 3 are gathered by the drawing roller 7 output, then the fiber strands pass through the front roller 4 and the yarn guide hook 5, driven by the rotation of the spindle, and with the rotation of the traveler 6, the front roller clamps the fiber strands intermittently, Driven by the rotating spindle, the fiber strands are twisted twice into yarn at the nip of the yarn delivery roller and the nip of the front roller.

As shown in Figure 3 and Figure 4, the front roller consists of rollers and rollers to form a jaw, the front roller is composed of a front bottom roller 41 and a front top roller 42, and the front bottom roller 41 is driven by the front roller, or by a servo Driven by a motor, the surface linear speed is less than or equal to the surface linear speed of the front roller. The front top roller presses tightly on the front bottom roller, and rotates with the rotation of the front bottom roller to form a jaw. The front top roller and the front roller The bottom roller is cylindrical, and at least one front roller has several grooves distributed along its circumference on the cylindrical surface. These grooves 420, 410 are located on the connecting line between the yarn guide hook and the front roller. Combined with Figure 1, at the groove of the front roller nip, the yarn is not clamped by the front roller, and the twist generated by the traveler rotation passes through the yarn body and is transmitted to the front roller nip. At the non-groove of the yarn, the yarn is clamped by the front roller, and the twist generated by the rotation of the traveler passes through the yarn body and is transmitted to the jaw of the front roller to complete the secondary twisting.

There are grooves on the cylindrical surface of the upper roller of the front roller or the cylindrical surface of the upper and lower rollers. The effect is intermittent. When the front roller is not clamping the fiber strands, the twists generated by the rotation of the traveler driven by the spindle are conducted through the yarn body, passing over the front roller to the front roller, and to the front roller to the front roller. When the fiber strands are twisted, when the front roller clamps the fiber strands, the twist generated by the rotation of the spindle belt traveler is transmitted to the front roller through the yarn body, and the fiber strands between the front roller and the front roller are in the Twist under the action of the torque generated by its own residual twist, and with the rotation of the front roller and the front roller, the twist is reduced, and at the same time, the fibers in the twisting triangle area are relaxed and rearranged, and the stress in the yarn body is eliminated; the front roller The surface linear speed of the working circle is less than or equal to the surface linear speed of the front roller.

As shown in Figure 5, the front roller is composed of a roller and a guide plate to form a front roller jaw. The front roller is composed of a guide plate 411, a guide ring 412, and a front top roller 42. The guide plate is non-circular, and the guide ring is The flexible ferrule is set on the guide plate. The front top roller is a rubber roller. The front top roller is driven by the front roller top roller. The front top roller is cylindrical and has at least one groove along its longitudinal cylindrical surface. The top roller presses on the guide ring and drives the guide ring to slide through friction.

As shown in Figure 6, the front roller is composed of a roller and a guide tube to form a front roller jaw, and the front roller is composed of a yarn guide shaft 401, a yarn guide tube 402, and a front top roller 42. On the yarn guide shaft, the front top roller is a rubber roller, and the front top roller is driven by the front roller top roller. The front top roller is cylindrical and has at least one groove along its longitudinal cylinder. The front top roller presses on On the yarn guide tube, the yarn guide tube is driven to rotate by friction.

As shown in Fig. 7, the groove is only located at the yarn guiding part of the roller cylinder, and the contact cylinder of the upper and lower rollers is still a complete cylinder to ensure the smooth rotation of the rollers.

Claims (11)

1. a spinning method for secondary twisting of spinning frame, it is characterized in that a roving fiber strip is fed into the spinning frame drafting mechanism, through middle roller and front roller drafting, output fiber strands from front roller, and then fiber The strands pass through the front rollers, which clamp the fiber strands intermittently. Driven by the rotating spindle, the fiber strands are drawn between the jaws of the front rollers and the jaws of the front rollers. Secondary twisting into yarn, The front roller clamps the fiber strands intermittently, and the fiber strands output from the front roller are then clamped by the front roller jaws, and the front roller and the front roller jaws are divided into two times to complete Twisting of fiber strands. 2. The secondary twisting spinning method of spinning frame according to claim 1, characterized in that when the front rollers are not clamping the fiber strands, the rotating spindle drives the twisting generated by the rotation of the traveler, which is conducted through the yarn body, Over the front roller to the front roller, the fiber strands between the front roller and the front roller produce twists, when the front roller clamps the fiber strands, the rotating spindle drives the twists generated by the rotation of the traveler, and passes through the yarn body Conducted to the nip of the front roller, the fiber strands between the front roller and the front roller, with the rotation of the front roller and the front roller, the twist is reduced, and twisted under the torque generated by its own residual twist, the twist triangle The fibers in the yarn area are relaxed and rearranged, and the stress of the fibers in the yarn body due to torsion is reduced. 3. The secondary twisting spinning method of spinning frame according to claim 1, characterized in that the intermittent opening and closing of the front roller jaw is realized by changing the shape of the front top roller and the front bottom roller cylinder surface Or through the method of mechanical and electromagnetic joint control, the upper and lower rollers can produce continuous opening and closing cycle actions to realize intermittent clamping control of fiber strands. 4. The secondary twisting spinning method of spinning frame according to claim 1, characterized in that the transmission mode of the front roller is front bottom roller transmission or front top roller transmission, and the front bottom roller The transmission source of the roller transmission comes from the bottom roller shaft of the front roller or from the servo motor, and the transmission source of the front top roller transmission comes from the top roller of the front roller. 5. The spinning frame secondary twist spinning method according to claim 1, characterized in that the linear velocity of the front roller is less than or equal to the linear velocity of the front roller. 6. A yarn forming device for the secondary twisting spinning method of the spinning frame according to claim 1, which is composed of the drafting mechanism and the front roller of the spinning frame, and is characterized in that it is on the output side of the front roller of the spinning frame , a group of front rollers capable of producing intermittent clamping control on fiber strands is provided, the front rollers are composed of front top rollers and front bottom rollers, and the front top rollers and front bottom rollers At least one of them is cylindrical, and at least one surface of the cylindrical front top roller and front bottom roller has a groove. 7. The spinning device according to claim 6, wherein the secondary twisting spinning method of the spinning frame is characterized in that the front roller mechanism has the following structural forms: the roller and the roller form the front roller, the roller and the guide plate form the front roller or The roller and the conduit constitute the front roller. 8. The yarn forming device of the secondary twisting spinning method of spinning frame according to claim 6, wherein the front roller is composed of front bottom roller and front top roller, and the front bottom roller is steel The parts are driven by the front roller or driven by the servo motor, the front top roller is a rubber roller, and the cylindrical surface of the front top roller or the front bottom roller has at least one groove along the circumference at the yarn path. 9. The yarn forming device of the secondary twisting spinning method of spinning frame according to claim 6, wherein the front roller is composed of a front bottom roller and a front top roller, and the front top roller and the front bottom roller They are all cylindrical surfaces, with at least one groove along the circumference, and when the front roller rotates, the groove of the front top roller corresponds to the groove of the front bottom roller, forming a groove opening, and the groove opening is located on the yarn guide hook On the connecting line with the jaws of the front roller. 10. The spinning device according to claim 6, wherein the secondary twisting spinning method of the spinning frame is characterized in that the front roller is composed of a guide plate, a guide ring, and a front top roller, and the guide plate is underneath it, and the guide plate is covered with a guide The guide plate is non-circular, the guide ring is a flexible ring, set on the guide plate, the front top roller is a rubber roller, the front top roller is driven by the front roller top roller, the front top roller is cylindrical, along its longitudinal direction There is at least one groove on the cylindrical surface. The front top roller presses on the guide ring mounted on the guide plate. When the groove of the front top roller contacts the guide plate, a groove opening is formed. The groove opening is located between the yarn guide hook and the front roller clamp. On the connecting line of the mouth, the front top roller frictionally drives the guide ring on the guide plate. 11. The yarn forming device of the secondary twisting spinning method of the spinning frame according to claim 6, wherein the front roller is composed of a yarn guide shaft, a yarn guide tube and a front top roller, and the yarn guide tube looper is in the On the yarn guide shaft, the front top roller is a rubber roller, and the front top roller is driven by the front roller top roller. The front top roller is cylindrical and has at least one groove along its longitudinal cylindrical surface. On the yarn guide tube, the yarn guide tube is driven by friction.