阅读说明：本技术 一种单侧自动换向连续在线玻璃纤维短切机 (Unilateral automatic reversing continuous online glass fiber chopping machine ) 是由 吴孝玮 于 2020-12-04 设计创作，主要内容包括：本发明涉及玻璃纤维制造技术领域,提供了一种单侧自动换向连续在线玻璃纤维短切机。包括：旋转换向系统、两组短切系统、第一导丝轮、分束器、启动轮和压纱轮,所述两组短切系统180°对置固定在所述旋转换向系统上,可跟随所述旋转换向系统旋转,交替使用。本发明的有益效果在于：所述短切机可实现不停机切换短切机头,方便短切机胶辊和刀辊等附件的日常维护保养,节省人力、减少浪费,提高生产效率、节约生产成本。(The invention relates to the technical field of glass fiber manufacturing, and provides a unilateral automatic reversing continuous online glass fiber chopping machine. The method comprises the following steps: the yarn cutting device comprises a rotary reversing system, two groups of short cutting systems, a first yarn guide wheel, a beam splitter, a starting wheel and a yarn pressing wheel, wherein the two groups of short cutting systems are oppositely fixed on the rotary reversing system at 180 degrees and can rotate along with the rotary reversing system for alternative use. The invention has the beneficial effects that: the chopping machine can realize switching the chopping machine head without stopping, is convenient for daily maintenance of accessories such as rubber rollers, knife rollers and the like of the chopping machine, saves manpower, reduces waste, improves production efficiency and saves production cost.)

1. The utility model provides a continuous online glass fiber chopping machine of unilateral automatic switch-over which characterized in that includes: the yarn cutting device comprises a rotary reversing system (1), two groups of short cutting systems (2), a first yarn guide wheel (4), a beam splitter (5), a starting wheel (3) and a yarn pressing wheel (6); wherein the content of the first and second substances,

the rotary reversing system (1) comprises a main shaft (1-1), a rotary supporting disc (1-3), a driving fluted disc (1-2) and a first driving device, wherein the tail end of the main shaft (1-1) is fixedly connected to a portal frame through a bearing, the first driving device is connected with the driving fluted disc (1-2) through a gear, and a plurality of connecting rods (1-6) are arranged between the driving fluted disc (1-2) and the rotary supporting disc (1-3);

two sets of short cut system (2)180 degree opposition is fixed on rotatory switching-over system (1), every group short cut system (2) include action wheel rubber roll wheel (2-1), be located on swinging boom (2-4) with action wheel rubber roll wheel (2-1) position relatively fixed's knife roll wheel (2-2) and second godet roller (2-3), be used for rising tight the tight cylinder (2-9), drive arrangement two and drive arrangement three of knife roll wheel (2-3), drive arrangement two is through the major axis with action wheel rubber roll wheel (2-1) directly link, drive arrangement three is fixed in on axle sleeve (2-11), drive arrangement three pass through the gear with fluted disc on swinging boom (2-4) is connected, swinging boom (2-4) are through bearing connection cover outside axle sleeve (2-11), the tensioning cylinder can rotate around the shaft sleeves (2-11) for 360 degrees, one end of the rotating arm (2-4) is provided with a rocker arm (2-5), and two ends of the tensioning cylinder (2-9) are respectively fixed on the rotating arm (2-4) and the rocker arm (2-5).

2. The single-side automatic reversing continuous online glass fiber chopping machine according to claim 1, wherein the rear end of the length of the second godet wheel (2-3) is directly connected with a telescopic cylinder (2-8), the telescopic cylinder (2-8) is fixed on a rotating arm (2-4) of the chopping system (2), and the second godet wheel (2-3) extends and retracts axially under the driving of the telescopic cylinder (2-8).

3. The single-side automatic reversing continuous online glass fiber chopping machine according to claim 1, wherein the beam splitter (5) is arranged at the front end of the chopping system (2), the front end of the beam splitter (5) is provided with a plurality of annular grooves for uniformly spreading glass fiber tows, the rear end of the beam splitter (5) is installed in two sliding rings (5-2), the shaft rod of the beam splitter (5) is connected with a screw rod sliding block (5-1), and the beam splitter (5) axially reciprocates under the driving of a driving device IV.

4. The single-sided automatic reversing continuous in-line glass fiber chopping machine as claimed in claim 1, wherein the first godet wheel (4) has two, 180 ° opposite arranged on the rotating disc (4-2) and stand by each other, the rear end of the rotating disc (4-2) is provided with a rotating shaft and fixed on the bearing seat (4-3).

5. The single-sided automatic reversing continuous on-line glass fiber chopping machine according to claim 1, characterized in that the yarn pressing wheel (6) is installed at one end of a driving cylinder, the driving cylinder is fixed above the main frame, and the driving cylinder pushes the yarn pressing wheel (6) to move.

6. The single-side automatic reversing continuous on-line glass fiber chopping machine as claimed in claim 1, wherein the tensioning cylinder (2-9) is provided with a pressure sensor for monitoring and controlling the engagement force of the driving wheel rubber roller (2-1) and the knife roller (2-2).

7. The single-sided automatic reversing continuous in-line glass fiber chopping machine according to claim 1, characterized in that the end of the main shaft (1-1) is provided with a conductive slip ring and a compressed air slip ring for powering the two groups of chopping systems (2).

8. The single-sided automatic reversing continuous in-line glass fiber chopping machine according to claim 3, characterized in that the starting wheel (3) is directly connected with a fifth driving device, and the fifth driving device is fixedly installed on the main frame of the equipment.

9. The single-sided automatic reversing continuous in-line glass fiber chopping machine according to claim 1, characterized in that the first driving means of the rotary reversing system (1) and the third driving means of the rotating arms (2-4) are controlled in a triple linkage, when the rotary reversing system (1) starts to rotate clockwise, the rotating arms (2-4) start to rotate counterclockwise, and the rotating arms (2-4) keep the same angular velocity as the reversing system (1).

10. The single-sided automatic reversing continuous in-line glass fiber chopping machine of claim 8, wherein the first driving device, the third driving device and the fourth driving device are servo driving motors, and the second driving device and the fifth driving device are variable frequency driving motors.

Technical Field

The invention relates to the technical field of glass fiber manufacturing, in particular to a unilateral automatic reversing continuous online glass fiber chopping machine.

Background

The glass fiber is an inorganic non-metallic material with excellent performance, has various varieties, has the advantages of good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, is usually used as a reinforcing material, an electrical insulating material and a heat insulation material in a composite material, and is widely applied to the national economy fields of circuit substrates and the like. The technological process includes crushing, crushing and sieving to obtain qualified powder, pneumatic conveying to large material bin, weighing and mixing to obtain material mixture, pneumatic conveying to kiln head bin, and melting in unit melting kiln with screw feeder to obtain molten glass. The melted glass liquid flows out from the melting part of the unit melting furnace, enters the main passage (or called clarification homogenization or regulation passage) for further clarification homogenization and temperature regulation, then flows into the liquid flowing groove through the transition passage (or called distribution passage) and the operation passage (or called forming passage), and flows out from the rows of porous platinum bushing plates to form fibers. And then the raw silk cakes or the direct roving bobbins are drawn and wound by high-speed rotating winding equipment after the raw silk cakes or the direct roving bobbins are cooled by a cooler and the sizing agent is coated on a monofilament oiling device.

The rubber roller and the blade of the existing chopping machine are easily-worn parts, need to be replaced periodically, and need to be stopped when being replaced, so that the glass liquid flowing out of the bushing plate is wasted in the maintenance and replacement time; generally, one chopping machine corresponds to about 6-8 bushing plates, so that about 10 persons are required to simultaneously stop the machine; in the period from shutdown to wire drawing start of the bushing, the fluctuation of the temperature and the fluctuation of the operation stability of the bushing cause the product fluctuation and the operation stability, so that the production efficiency and the qualification rate are reduced, and more waste and cost rise are caused.

In order to reduce the shutdown time, the on-line chopping machine used in the market at present is generally made into a double-sided machine, the chopping machine horizontally rotates 180 degrees after shutdown, then the chopping machine is opened for operation, a rubber roll and a knife roll which need to be maintained rotate to a standby side, the operation of maintenance personnel is facilitated, even if the operation is carried out by a plurality of people, the influence of shutdown on the stability of a bushing cannot be completely eliminated.

In order to realize switching without stopping, chinese patent CN201210402122.4 proposes an online chopping machine for glass fibers, which can separate a knife roller from a rubber roller, and then the rubber roller and the knife roller respectively perform 180 ° rotation switching on a vertical plane, but after the knife roller and the rubber roller are separated, the traction force of the chopping machine is lost, and the glass fiber tows cannot be continuously pulled, so that the tows are interrupted, and therefore switching without stopping cannot be realized.

Disclosure of Invention

The invention aims to provide a unilateral automatic reversing continuous online glass fiber chopping machine to solve the technical problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a continuous online glass fiber chopping machine of unilateral automatic switch-over which characterized in that includes: the yarn cutting device comprises a rotary reversing system, two groups of short cutting systems, a first yarn guide wheel, a beam splitter, a starting wheel and a yarn pressing wheel; the rotary reversing system comprises a main shaft, a rotary supporting plate, a driving fluted disc and a first driving device, wherein the tail end of the main shaft is fixedly connected onto a portal frame through a bearing; two sets of 180 oppositions of short system of cutting are fixed on the rotatory switching-over system, every group the short system include action wheel rubber roll wheel, be located on the swinging boom with action wheel rubber roll wheel position relatively fixed's knife roll wheel and second godet wheel, be used for rising and tightly the tight cylinder that rises, drive arrangement two and the drive arrangement three of knife roll wheel, drive arrangement two through the major axis with action wheel rubber roll wheel directly links, drive arrangement three is fixed in on the axle sleeve, drive arrangement three-way passing gear with fluted disc on the swinging boom is connected, the swinging boom passes through the bearing connection cover outside the axle sleeve, can wind 360 rotations of axle sleeve, a rocking arm is installed to the one end of swinging boom, the both ends of the tight cylinder that rises are fixed respectively on swinging boom and the rocking arm.

In an optional embodiment, the rear end of the length of the second godet wheel is directly connected with a telescopic cylinder, the telescopic cylinder is fixed on a rotating arm of the short cutting system, and the second godet wheel extends and retracts axially under the driving of the telescopic cylinder.

In an optional embodiment, the beam splitter is arranged at the front end of the chopping system, the front end of the beam splitter is provided with a plurality of annular grooves for uniformly spreading the glass fiber tows, the rear end of the beam splitter is arranged in two sliding rings, a shaft rod of the beam splitter is connected with a screw rod sliding block, and the beam splitter axially reciprocates under the driving of a driving device IV.

In an optional embodiment, the number of the first godet wheels is two, the first godet wheels are oppositely arranged on a rotating disc at 180 degrees and are standby each other, and the rear end of the rotating disc is provided with a rotating shaft and fixed on a bearing seat.

In an optional embodiment, the yarn pressing wheel is installed at one end of a driving cylinder, the driving cylinder is fixed above the main frame, and the driving cylinder pushes the yarn pressing wheel to move.

In an optional embodiment, the tensioning cylinder is provided with a pressure sensor for monitoring and controlling the meshing force of the driving wheel rubber roller and the knife roller.

In an alternative embodiment, the end of the main shaft is provided with a conductive slip ring and a compressed air slip ring for powering the two groups of chopping systems.

In an alternative embodiment, the starting wheel is directly connected with a driving device five, and the driving device five is fixedly arranged on the main frame of the equipment.

In an optional embodiment, the first driving device of the rotary reversing system and the third driving device of the rotating arm are controlled in a linkage manner, when the rotary reversing system starts to rotate clockwise, the rotating arm starts to rotate anticlockwise, and the angular velocity of the rotating arm is kept the same as that of the reversing system.

In an optional embodiment, the first driving device, the third driving device and the fourth driving device are servo driving motors, and the second driving device and the fifth driving device are variable frequency driving motors.

The invention has the beneficial effects that:

(1) the rubber roll and the knife roll of the single-side automatic reversing continuous online glass fiber chopping machine are reversed for maintenance after being used for a period of time, the reversing system driving device drives the reversing system to rotate clockwise, and meanwhile, the rotating arm driving motor drives the rotating arm to rotate anticlockwise, so that the relative positions of the knife roll and the rubber roll are not changed, tows cannot be interrupted, switching without shutdown can be realized, and waste of glass liquid is avoided.

(2) The single-side automatic reversing continuous online glass fiber chopping machine does not need to wind glass fibers into rolls, but directly cuts yarns coated with the sizing agent after bundling, and compared with offline chopping, the production mode of online chopping saves the logistics transportation cost and labor cost of winding into rolls, avoids waste of end finding, skin leaving and the like, and greatly improves the production efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic front view of a single-side automatic reversing continuous on-line glass fiber chopping machine according to an embodiment of the present invention.

FIG. 2 is a schematic view of the back side internal structure of the single-side automatic reversing continuous on-line glass fiber chopping machine according to an embodiment of the present invention.

FIG. 3 is a schematic view of the structure of the other side of the back of the single-side automatic reversing continuous on-line glass fiber chopping machine in one embodiment of the present invention.

FIG. 4 is a schematic view of a rotary reversing system of the single-side automatic reversing continuous on-line glass fiber chopping machine according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of the supporting turntable and its supporting base of the rotary direction changing system of the single-side automatic direction changing continuous on-line glass fiber chopping machine according to an embodiment of the present invention.

FIG. 6 is a schematic view of a chopping system of a single-side automatic reversing continuous on-line glass fiber chopping machine according to an embodiment of the present invention.

FIG. 7 is a schematic power diagram of a chopping system of the single-side automatic reversing continuous on-line glass fiber chopping machine in an embodiment of the present invention.

FIG. 8 is a schematic view of a starting wheel structure of a single-sided automatic reversing continuous on-line glass fiber chopping machine in an embodiment of the present invention.

FIG. 9 is a schematic view of a first guide roller of the single-side automatic reversing continuous in-line glass fiber chopping machine according to an embodiment of the present invention.

FIG. 10 is a schematic view of a beam splitter of a single-sided automatic reversing continuous in-line glass fiber chopping machine according to an embodiment of the present invention.

FIG. 11 is a first schematic view of a single-side automatic reversing continuous on-line glass fiber chopping machine according to an embodiment of the present invention: and (5) drawing and winding.

FIG. 12 is a second schematic diagram of the operation of the single-side automatic reversing continuous on-line glass fiber chopping machine in one embodiment of the present invention: the yarn pressing wheel pushes down the yarn pressing.

FIG. 13 is a third schematic diagram of the operation of the single-side automatic reversing continuous on-line glass fiber chopping machine in one embodiment of the present invention: and (5) normally running.

FIG. 14 is a fourth schematic view of the operation of the single-side automatic reversing continuous on-line glass fiber chopping machine in one embodiment of the present invention: the commutation process proceeds to 90 °.

FIG. 15 is a fifth schematic view of the operation of the single-side automatic reversing continuous on-line glass fiber chopping machine in one embodiment of the present invention: the commutation process proceeds to 135 °.

FIG. 16 is a sixth schematic view of a single-side automatic reversing continuous on-line glass fiber chopping machine in an embodiment of the present invention: the commutation process proceeds to 180 °.

FIG. 17 is a seventh schematic diagram of the operation of the single-side automatic reversing continuous on-line glass fiber chopping machine in one embodiment of the present invention: the yarn pressing wheel pushes down the yarn pressing.

FIG. 18 is a diagram illustrating an operating principle of a single-side automatic reversing continuous on-line glass fiber chopping machine according to an embodiment of the present invention: and (5) finishing reversing and normally operating.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

The aim of this embodiment is to provide a continuous online glass fiber chopping machine of unilateral automatic switch-over, include: the rotary reversing system 1 comprises two groups of chopping systems 2 which are oppositely fixed on the rotary reversing system 1 in 180 degrees, a beam splitter 5 at the front end of each chopping system 2, a first godet wheel 4, a starting wheel 3, a yarn pressing wheel 6 and a control device.

The rotary reversing system 1 comprises a main shaft 1-1, rotary supporting disks 1-3, a driving fluted disc 1-2, the tail ends of the main shaft 1-1 are connected and fixed on a portal frame through bearings, a servo driving motor 1-5 is connected with the driving fluted disc 1-2 through gears, a plurality of connecting rods 1-6 are arranged between the driving fluted disc 1-2 and the rotary supporting disks 1-3, and a conductive slip ring 1-7 and a compressed air slip ring 1-8 which are positioned at the tail end of the main shaft 1-1 are used for providing power for the two groups of short cutting systems 2.

Specifically, the chopping system 2 comprises a driving wheel rubber roller 2-1, a knife roller 2-2 and a second wire guide wheel 2-3 which are positioned on a rotating arm 2-4 and are relatively fixed with the driving wheel rubber roller 2-1, and a tensioning cylinder 2-9 for tensioning the knife roller 2-2, wherein a variable frequency driving motor 2-7 is directly connected with the driving wheel rubber roller 2-1 through a long shaft, a servo driving motor 2-6 is fixed on a shaft sleeve 2-11, the servo driving motor 2-6 is connected with a fluted disc on the rotating arm 2-4 through a gear, the rotating arm 2-4 is sleeved outside the shaft sleeve 2-11 through a bearing connection and can rotate 360 degrees around the shaft sleeve 2-11, one end of the rotating arm 2-4 is provided with a rocker arm 2-5, and two ends of the tensioning cylinder 2-9 are respectively fixed on the rotating arm 2-4 and the rocker arm 2-5, the opening and closing of the knife roller 2-2 and the driving wheel rubber roller 2-1 are controlled, and the tensioning cylinder 2-9 is provided with a pressure sensor which can monitor and control the meshing force of the knife roller 2-2 and the driving wheel rubber roller 2-1.

Further, an air cylinder 2-8 is arranged on the other side of the rotating arm 2-4, and the second godet wheel 2-3 extends and retracts along the axial direction of the air cylinder under the driving of the air cylinder. And a compressed air slip ring 2-12 is arranged on the shaft sleeve 2-11 and used for providing power for the air cylinders 2-8 and 2-9.

Furthermore, the starting wheel 3 is directly connected with a variable-frequency driving motor 3-1, and the driving motor 3-1 is fixedly arranged on the main frame of the equipment. The yarn pressing wheel 6 is fixed at one end of the air cylinder, and the air cylinder is fixed above the main frame of the equipment. In addition, the rear end of the beam splitter 5 is nested on the two slip rings 5-2 and can slide along the axial direction, the beam splitter 5 and the lead screw sliding block 5-1 are relatively fixed, and the sliding block 5-1 drives the beam splitter 5 to reciprocate along the axial direction under the driving of the lead screw motor 5-3.

It should be noted that the first godet 4 and the standby godet 4-1 are oppositely mounted on a rotating disk 4-2, the rear end of the rotating disk 4-2 is fixed to a bearing block 4-3 by a bearing, and the rotating disk 4-2 can be manually rotated to switch the first godet 4 and the standby godet 4-1.

Example one

The embodiment provides a single-side automatic reversing continuous online glass fiber chopping machine, which comprises a rotary reversing system 1, a chopping system 2, a starting wheel 3, a first godet wheel 4, a beam splitter 5 and a yarn pressing wheel 6, wherein the yarn pressing wheel 6 is fixed at one end of an air cylinder which is fixed above a main frame of the equipment, and the chopping system is shown in the attached drawings 1 to 3.

As shown in the attached figure 4, the rotary reversing system comprises a main shaft 1-1, a rotary supporting disc 1-3, a driving fluted disc 1-2, wherein the tail end of the main shaft 1-1 is fixedly connected with a portal frame through a bearing, a servo driving motor 1-5 is connected with the driving fluted disc 1-2 through a gear, a plurality of connecting rods 1-6 are arranged between the driving fluted disc 1-2 and the rotary supporting disc 1-3, and a conductive sliding ring 1-7 and a compressed air sliding ring 1-8 which are positioned at the tail end of the main shaft 1-1 are used for providing power for two groups of short cutting systems 2.

As shown in figure 5, the rotary supporting disk 1-3 is clamped in the circular arc-shaped groove of the supporting base 1-4, the supporting base 1-4 is provided with a plurality of oil filling holes, and gaps among the oil filling holes are lubricated by high-pressure oil injection.

As shown in attached figures 6 and 7, the chopping system 2 comprises a driving wheel rubber roller 2-1, a knife roller 2-2 and a second wire guide wheel 2-3 which are positioned on a rotating arm 2-4 and are relatively fixed with the driving wheel, and a tensioning cylinder 2-9 for tensioning the knife roller, wherein a variable frequency driving motor 2-7 is directly connected with the driving wheel rubber roller 2-1 through a long shaft, a servo driving motor 2-6 is fixed on a shaft sleeve 2-11 and is connected with a fluted disc on the rotating arm 2-4 through a gear, the rotating arm 2-4 is sleeved outside the shaft sleeve 2-11 through a bearing connection and can rotate 360 degrees around the shaft sleeve 2-11, one end of the rotating arm 2-4 is provided with a rocker arm 2-5, and two ends of the tensioning cylinder 2-9 are respectively fixed on the rotating arm 2-4 and the rocker arm 2-5, the opening and closing of the knife roller 2-2 and the driving wheel rubber roller 2-1 can be controlled, and the tensioning cylinder 2-9 is provided with a pressure sensor which can monitor and control the engagement force of the knife roller 2-2 and the driving wheel rubber roller 2-1.

It is worth mentioning that the other side of the rotating arm 2-4 is provided with an air cylinder 2-8, and the second godet wheel 2-3 can extend and retract along the axial direction under the driving of the air cylinder 2-8. And a compressed air slip ring 2-12 is arranged on the shaft sleeve 2-11 and used for providing power for the air cylinders 2-8 and 2-9.

As shown in figure 8, the starting wheel is directly connected with a variable-frequency driving motor 3-1, and the driving motor 3-1 is fixedly arranged on a main frame of the equipment.

As shown in fig. 9, the first godet wheel 4 and the standby godet wheel 4-1 are installed opposite to each other on a rotating disk 4-2, the rear end of which is fixed to a bearing housing 4-3 through a bearing, and the rotating disk 4-2 can be manually rotated to switch the first godet wheel 4 and the standby godet wheel 4-1.

As shown in the attached drawing 10, the rear end of the beam splitter 5 is nested on two slip rings 5-2 and can slide along the axial direction, the beam splitter 5 and the lead screw slide block 5-1 are relatively fixed, and the slide block 5-1 drives the beam splitter 5 to reciprocate along the axial direction under the drive of the lead screw motor 5-3.

The working process of the unilateral automatic reversing continuous online glass fiber chopping machine in the embodiment is as follows:

as shown in fig. 11, when the starting device is ready, the head a starts to operate, the starting wheel operates, the glass fiber tows are manually led in from the left side, pass through the beam splitter 5, the first godet wheel 4 and the driving wheel glue roller 2-1, and then are wound on the starting wheel 3, and the linear speeds of the starting wheel 3 and the driving wheel glue roller 2-1 are the same in the process.

As shown in figure 12, the air cylinder pushes the yarn pressing wheel 6 to press downwards, the glass fiber tows are pressed for a certain angle, meanwhile, the starting wheel 3 is started to decelerate, the glass fiber tows are brought between the driving wheel rubber roller 2-1 and the knife roller 2-2 by the driving wheel rubber roller 2-1 to begin to be chopped, and the machine head A normally operates as shown in figure 13.

After the driving wheel rubber roller wheel 2-1 and the knife roller wheel 2-2 are used for a period of time, reversing maintenance is needed, the driving motor of the rotary reversing system 1 drives the reversing system to rotate clockwise, and meanwhile, the driving motor of the rotating arm 2-4 drives the rotating arm 2-4 to rotate anticlockwise, so that the relative positions of the driving wheel rubber roller wheel 2-1 and the knife roller wheel 2-2 are guaranteed to be unchanged.

The rotating speeds of the machine head B and the machine head A are the same in the reversing process, the second godet wheel 2-3 of the machine head B retracts into the panel of the equipment, and the reversing process is shown in attached figures 14-16.

As shown in figure 17, after the machine heads A and B are switched, the cylinder pushes the yarn pressing wheel 6 to press downwards, the glass fiber tows are pressed down for a certain angle, meanwhile, the machine head A is decelerated, the glass fiber tows are driven into the space between the driving wheel rubber roller wheel 2-1 and the knife roller wheel 2-2 by the machine head rubber roller wheel B to start to be chopped, and the machine head B operates normally, as shown in figure 18, the operation is repeated.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.