Polyimide scattered filament short cutting device

Abstract

The utility model relates to the technical field of polyimide fibers, in particular to a polyimide scattered filament chopping device. The utility model relates to a polyimide scattered filament short-cut cutting device which comprises a conveying belt, a steam heat box, a pressing piece, a setting agent spraying piece, a licker-in with a brush, a pair of to-be-clamped feeding rollers and a cut-off machine. The steam heat box is arranged at the conveying starting end of the conveying belt, the conveying belt penetrates through the steam heat box, the pressing piece and the setting agent spraying piece to be sequentially arranged above the conveying belt in the conveying direction of the conveying belt, the licker-in with the brush is arranged at the conveying tail end of the conveying belt, and the cut-off machines are arranged at the conveying tail end of the conveying belt at intervals. And the pair of to-be-clamped feeding rollers is arranged between the licker-in with the brush and the cut-off machine. The problems that disordered fibers are difficult to comb, the cutting length is not easy to control and the like can be effectively solved, the chopped fibers can be cut within 10 mm, and the requirements of high-performance composite materials and other fields with the high requirement for the specific length of the chopped fibers are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyimide fiber technical field especially relates to a polyimide disordered filament short cut cutting device. BACKGROUND

[0002] The production efficiency of polyimide short cut fiber production equipment in the prior art is low, and the short cutting work of large denier fiber cannot be completed; usually, the cutting of fiber is realized by cutter, hob or extrusion, the length of short fiber that can be normally cut in the prior art is generally in the range of 10 millimeters and above, the size length of the produced short cut fiber is unstable, the continuous production of fiber bundling and short cutting cannot be realized, and a large amount of time and labor cost are wasted.

[0003] In the field of polyimide fiber processing technology, due to the large rigidity of polyimide fiber, how to efficiently pretreat the disordered polyimide fiber and realize accurate cutting to meet the needs of different industrial applications has always been a key problem. UTILITY MODEL CONTENTS

[0004] The utility model relates to polyimide fiber technical field especially relates to a polyimide disordered filament short cut cutting device.

[0005] The utility model discloses a polyimide disordered filament short cut cutting device, including conveyer belt, steam hot box, pressure tight piece, setting agent spraying spare, with brush thorn roller, a pair of clamping and feeding roller and cutting machine, steam hot box sets up in the transmission beginning of conveyer belt, the conveyer belt passes through steam hot box, pressure tight piece and setting agent spraying spare are sequentially arranged on conveyer belt top along the conveyer belt delivery direction, with brush thorn roller sets up in the transmission end of conveyer belt, cutting machine is set apart in the transmission end of conveyer belt, a pair of clamping and feeding roller are set between with brush thorn roller and cutting machine.

[0006] Further, the pressure tight piece includes a pneumatic leather pressing roller.

[0007] Further, it further includes the first air knife arranged on one side of the pneumatic leather pressing roller.

[0008] Further, it further includes the second air knife arranged on one side of the brush thorn roller.

[0009] Further, it further includes the feeding platform arranged at the transmission beginning of the conveyer belt.

[0010] Further, one end of the feeding platform is arranged above the transmission beginning of the conveyer belt in a downward inclination.

[0011] Further, the cutting machine includes a blade and a driving member, and the driving member drives the blade to move up and down.

[0012] Further, a fiber containing barrel is arranged directly below the blade.

[0013] The present utility model makes the disordered fibers pass through the conveyor belt and be transported into the steam heat box, preheats the fibers through the steam heat box, makes the fibers further soft, is convenient for carding, makes the fiber bundle compact through the compacting piece, enters the brush barb roller, the brush and the barb on the brush barb roller hook the fibers, straightens the fibers, then the setting agent is evenly sprayed on the straightened fiber bundle through the setting agent spraying, after passing through the brush barb roller, enters the clamping feeding roller, and enters the cutting machine more neatly, and the cutting length of the short cut fiber is within 10mm.

[0014] The steam heat box, the compacting piece, the brush barb roller, the spraying device, the clamping feeding roller and the cutting machine are cooperated, the efficient pretreatment and the accurate cutting of the polyimide disordered fiber filament are realized. The steam heat box preheats the fibers, improves the carding property, the compacting piece compacts the fiber bundle, guarantees the processing stability, the brush barb roller straightens the fibers, improves the fiber property, the high speed airflow of the air knife peels off the entangled fibers from the fiber bundle and blows away, the setting spraying part applies the setting agent, improves the subsequent processing property of the fibers, the clamping feeding roller and the cutting machine are cooperated, and the accurate control of the short cut fiber is realized. The whole process can effectively reduce the error and the instability caused by manual intervention, and improves the product quality and the production efficiency.

[0015] The present utility model can effectively solve the problems of the carding difficulty of the disordered fibers and the cutting length difficult to control, realizes the cutting within 10mm of the short cut fiber, and meets the demand of the field such as the high performance composite material and the like for the short cut fiber with high specific length requirement. DRAWINGS

[0016] Figure 1 It is a structure schematic view of the polyimide disordered filament short cut cutting device.

[0017] 1, conveyor belt;2, steam heat box;3, compacting piece;31, pneumatic leather compression roller;4, setting agent spraying part;5, brush barb roller;6, clamping feeding roller;7, cutting machine;71, blade;8, first air knife;9, second air knife;10, feeding platform;20, fiber containing barrel. DETAILED DESCRIPTION

[0018] The following is the specific embodiment of the present utility model and the technical scheme of the present utility model is further described in combination with the drawings, but the present utility model is not limited to these embodiments.

[0019] Embodiment 1

[0020] As Figure 1As shown, the polyimide disordered long filament short cutting device, including conveying belt 1, steam hot box 2, compression part 3, setting agent spraying part 4, with brush thorn roller 5, a pair of clamping feeding roller 6 and cutting machine 7 7;Steam hot box 2 is arranged at the transmission beginning end of conveying belt 1, conveying belt 1 passes through steam hot box 2, compression part 3 and setting agent spraying part 4 are sequentially arranged above conveying belt 1 along the conveying direction of conveying belt 1, with brush thorn roller 5 is arranged at the transmission end of conveying belt 1, cutting machine 7 is arranged at the transmission end of conveying belt 1 with interval, a pair of clamping feeding roller 6 is arranged between brush thorn roller 5 and cutting machine 7.

[0021] The utility model discloses let the fiber of disorder pass through conveying belt 1, is transported to steam hot box 2, preheats fiber through steam hot box 2, makes fiber further soft, and it is convenient to card, makes the bundle compaction through compression part 3, enters with brush thorn roller 5, the brush on brush thorn roller and thorn hook the fiber, make fiber straight, then setting agent spraying evenly sprays setting agent on the bundle that is straightened, after brush thorn roller, enter clamping feeding roller 6, relatively neat enter cutting machine 7, can realize the cutting of short cutting fiber 10mm within.

[0022] Steam hot box 2 is the product that can be bought in prior art, adopts steam hot box 2 as the first link of fiber pretreatment.The steam temperature in steam hot box 2 is accurately set and stably controlled at 100 degrees Celsius.When fiber enters steam hot box 2, under the heat action of steam, the thermal motion of fiber molecule intensifies, the physical property of fiber changes, and its internal structure gradually relaxes, thereby becoming further soft.This softening effect makes fiber more easily handled in the subsequent carding process, reduces the entanglement and friction resistance between fibers, and lays a good foundation for subsequent processing procedures.

[0023] The compacted bundle then enters the brush thorn roller 5. The brushes and spikes on the surface of the brush thorn roller play a crucial role. When the bundle comes into contact with the brush thorn roller, the soft bristles of the brush first come into contact with the fibers, providing a preliminary carding and guiding effect on the fibers, reducing fiber bending and entanglement. The spikes on the thorn roller, on the other hand, can penetrate deep into the bundle, hooking each fiber and, under the rotation of the thorn roller, exerting a stretching force on the fibers, gradually straightening fibers that may have been bent or curled. This process is very important for improving the orientation and straightness of the fibers, and can significantly improve the performance of the fibers, such as improving the mechanical properties of fiber-reinforced composites. For example, in the field of aerospace, the straightness of the fibers directly affects the strength and stiffness of the material, and fibers treated by the brush thorn roller can better meet these high-performance requirements.

[0024] When the fibers are straightened by the brush roller, the sizing agent is sprayed onto the fiber bundle by the sizing spray 4. The sizing spray ensures that the sizing agent is evenly applied to the surface of each fiber in the fiber bundle. The sizing agent (a commercially available polyester sizing agent) forms a protective film on the surface of the fibers or changes the surface chemistry of the fibers, thereby fixing the straightened state of the fibers and preventing the fibers from curling or deforming in subsequent processes. At the same time, the sizing agent can improve the interfacial bonding properties of the fibers with other materials, such as the resin matrix in a composite material.

[0025] The fiber bundle that has been treated by the brush roller and sprayed with the sizing agent enters the clamping feed roller 6. The function of the clamping feed roller 6 is to further arrange the fiber bundle and transport it to the cutting machine 7 in a more orderly state. The clamping feed roller 6 controls the tension and straightness of the fiber bundle by adjusting the roller spacing and rotating speed, so that the fiber bundle enters the cutting machine 7. The cutting machine 7 uses advanced cutting technology to accurately cut the fiber bundle according to the set parameters, and the fiber is cut into chopped fibers with a length of less than 10 mm. The cut fibers fall into the fiber container 20 under the action of gravity, and the design of the fiber container 20 can easily collect and store the chopped fibers, which is convenient for subsequent packaging, transportation and use. For example, the chopped fiber reinforced material used in the manufacture of automobile parts requires precise length control to ensure uniform distribution and good performance in the parts. The clamping feed roller 6 and the cutting machine 7 work together to meet this demand.

[0026] The utility model discloses a steam heating box 2, pressing piece 3, brush roller, spray device, clamping feed roller 6 and cutting machine 7 etc. the synergies of multiple links, realize the efficient pretreatment and accurate cutting of polyimide disordered fiber filament. The steam heating box 2 preheats the fiber to improve the combability, and the pressing piece 3 compacts the fiber bundle to ensure the processing stability, and the brush roller straightens the fiber to improve the fiber performance, and the high-speed airflow of the air knife peels off the entangled fiber from the fiber bundle and blows it away, and the sizing spray applies the sizing agent to improve the subsequent processing performance of the fiber, and the clamping feed roller 6 and the cutting machine 7 work together to realize the accurate control of the chopped fiber. The whole process can effectively reduce the error and instability caused by manual intervention, and improve the product quality and production efficiency.

[0027] The utility model discloses can effectively solve the problem of disordered fiber combing difficulty, the length of cutting is not easy to control and so on, realizes the cutting of chopped fiber less than 10mm, to satisfy such as high-performance composite material etc. the demand of the field of higher length requirement of chopped fiber.

[0028] Example 2

[0029] The compacting member 3 can include a pneumatic skin press roller 31. The fibers from the steam heat box 2 form a fiber bundle, which then enters the pneumatic skin press roller 31 unit. The pneumatic skin press roller 31 uses the pressure provided by compressed air to compact the fiber bundle. By adjusting the size of the pneumatic pressure, the degree of compaction of the fiber bundle can be accurately controlled. The compacted fiber bundle has a more compact structure and the arrangement between the fibers is more regular, which not only facilitates uniform stress on the fibers in subsequent processes, but also reduces fiber loss and confusion in subsequent processing, improving the stability and reliability of the entire process.

[0030] Embodiment 3

[0031] The polyimide disordered filament short cutting device also includes a first air knife 8 that can be arranged on one side of the pneumatic skin press roller 31. It can also include a second air knife 9 arranged on one side of the brush spike roller 5.

[0032] The air knife plays a crucial role in the fiber processing process. Its working principle is based on compressed air technology. When compressed air with a certain pressure and flow rate is delivered to the inside of the air knife, it will quickly flow and accumulate energy in the special structure channel of the air knife. Once it reaches the outlet of the air knife, due to the special design of the outlet, such as a narrow gap or a specific flow guide shape, the compressed air is accelerated and forms a strong pressure air flow. This strong pressure air flow has the characteristics of high speed, high pressure and high momentum, and can accurately and effectively act on the tangled fiber part when facing the tangled fiber problem in the fiber production process. Its strong impact force can overcome the adhesion and friction between the tangled fiber and the surrounding fibers or equipment parts, and can strip and blow away the tangled fiber from the fiber bundle.

[0033] Embodiment 4

[0034] It also includes a feeding platform 10 arranged at the transmission start end of the conveyor belt 1. One end of the feeding platform 10 is inclined downward and arranged above the transmission start end of the conveyor belt 1, so that the disordered fibers are evenly laid on the feeding platform 10, and then conveyed to the steam heat box 2 through the conveyor belt 1.

[0035] The cutting machine 7 includes a blade 71 and a driving member that drives the blade 71 to move up and down. A fiber containing barrel 20 is arranged directly below the blade 71. The cut fibers fall into the fiber containing barrel 20.

[0036] Embodiment 5

[0037] The present utility model makes the disordered fibers evenly lay on the feeding platform 10, through the conveyor belt 1, is transported to the steam hot box 2, through the steam hot box 2 preheats the fiber, and the steam temperature is controlled at 100 degrees Celsius, makes the fiber further soft, is convenient for carding, through the pneumatic leather pressure roller 31 makes the tow compact, enters the band brush thorn roller 5, the brush and the thorn on the brush thorn roller hook the fiber, makes the fiber straight, then the setting agent is evenly sprayed on the straightened tow through the spraying device, after passing through the brush thorn roller, enters the clamping and feeding roller 6, enters the cutting machine 7 more neatly, can realize the cutting of short fiber 10mm within, the fiber after cutting falls into the silk bucket 20.

[0038] The above not involved, applicable to the prior art.

[0039] Although some specific embodiments of the present utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the present utility model, and those skilled in the art in the technical field to which the present utility model belongs can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, but will not deviate from the direction of the present utility model or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modification, equivalent replacement, improvement, etc. made according to the technical essence of the present utility model to the above embodiments should be included in the protection scope of the present utility model.

Claims

1. A polyimide bulked filament staple cutting apparatus characterized by: It includes a conveyor belt (1), a steam heat box (2), a pressing element (3), a setting agent spraying element (4), a brush roller (5), a pair of clamping feeding rollers (6) and a cutting machine (7); the steam heat box (2) is arranged at the transmission start end of the conveyor belt (1), the conveyor belt (1) passes through the steam heat box (2), the pressing element (3) and the setting agent spraying element (4) are sequentially arranged above the conveyor belt (1) along the conveying direction of the conveyor belt (1), the brush roller (5) is arranged at the transmission end of the conveyor belt (1), the cutting machine (7) is arranged at the transmission end of the conveyor belt (1) at intervals, and the pair of clamping feeding rollers (6) are arranged between the brush roller (5) and the cutting machine (7).

2. A polyimide bulk filament staple cutting apparatus as defined in claim 1, wherein: The pressing element (3) comprises a pneumatic leather pressing roller (31).

3. A polyimide bulk filament staple cutting apparatus as defined in claim 2, wherein: A first air knife (8) is further arranged on one side of the pneumatic leather pressing roller (31).

4. A polyimide bulk filament staple cutting apparatus as defined in claim 2, wherein: A second air knife (9) is further arranged on one side of the brush roller (5).

5. A polyimide bulk filament staple cutting apparatus as defined in claim 2, wherein: A feeding platform (10) is further arranged at the transmission start end of the conveyor belt (1).

6. A polyimide bulk filament staple cutting apparatus as defined in claim 5, wherein: One end of the feeding platform (10) is arranged above the transmission start end of the conveyor belt (1) in a downward inclined manner.

7. A polyimide bulk filament staple cutting apparatus as defined in claim 1, wherein: The cutting machine (7) comprises a blade (71) and a driving element, and the driving element drives the blade (71) to move up and down.

8. A polyimide bulk filament staple cutting apparatus as defined in claim 7, wherein: A silk containing barrel (20) is arranged directly below the blade (71).

Images