CN115748105A - Auxiliary alumina chopped strand mat forming air-laid device and method - Google Patents
Auxiliary alumina chopped strand mat forming air-laid device and method Download PDFInfo
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- CN115748105A CN115748105A CN202211603836.1A CN202211603836A CN115748105A CN 115748105 A CN115748105 A CN 115748105A CN 202211603836 A CN202211603836 A CN 202211603836A CN 115748105 A CN115748105 A CN 115748105A
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Abstract
The invention discloses an auxiliary alumina chopped strand mat forming air-laid device and method, and belongs to the technical field of textile accessories. The device is including feeding the cotton dolly, it is connected with the comber to feed the cotton dolly, the comber has high hopper through fan pipe connection, the below of high hopper is provided with the corridor device, be provided with the multirow needle roller group of constituteing by a plurality of needle roller in the corridor device, the below of corridor device is provided with the negative pressure suction fan, be provided with conveyor between negative pressure suction fan and the corridor device, the exit of corridor device is provided with the compression roller. The method avoids the damage of the traditional carding net to the fiber, so as to meet the needling condition of a needle machine and the requirement of high-thickness net formation, and further ensure high-quality and stable preparation of the alumina chopped strand mat; the problem that the alumina fiber is broken and extruded into powder in the web forming process can be effectively reduced, and the production efficiency and the production quality of the alumina chopped strand mat can be effectively improved.
Description
Technical Field
The invention relates to an auxiliary alumina chopped strand mat forming air-laid device and method, and belongs to the technical field of textile accessories.
Background
The alumina fiber has the advantages of light weight, high temperature resistance (the use temperature is 1300-1700 ℃), good thermal stability and the like, and the prepared alumina fiber felt can be used as a heat-resistant material to be applied to heat insulation and bonding parts in a high-temperature furnace and a high-temperature pipeline. The traditional preparation method of the alumina fiber felt is a high-temperature sintering method, however, the alumina fiber can shrink by more than 30% in the high-temperature heating process, so that the problems that the fiber is cut off in the manufacturing process, the thickness/volume density is not uniform, the strength is not enough, the fiber is easy to wind and knot and the like are caused.
In order to avoid adverse effects caused by high-temperature sintering in the preparation process of the alumina fiber felt, a method for preparing the alumina fiber felt by preparing alumina fibers into a net and then needling can be adopted. However, because the alumina fiber has the characteristic of high brittleness, the fiber is easy to break and comb into powder in the carding process of the traditional carding and web-forming method, and the surface density is 100-800g/m 2 Within the range, the requirements of subsequent needling conditions and high-thickness web formation cannot be met.
Disclosure of Invention
[ problem ] to
The alumina fiber has large brittleness and high-temperature heating shrinkage, the fiber is easy to break and is combed into powder in the carding process of the traditional carding and web forming method, and the surface density is 100-800g/m 2 Within the range, the subsequent needling condition cannot be met, and the requirement of high-thickness web formation cannot be met, so that the traditional alumina fiber felt preparation method can cause raw material waste, more defects of the final product and unstable performance.
[ solution ]
In order to solve the problems, the invention provides an auxiliary alumina chopped strand mat forming air-laid device and method, on the premise of less damage to fibers and wide applicable raw materials of the air-laid method, the invention avoids the damage to the fibers caused by the traditional carding and laying by introducing the air-laid method, so as to meet the needling condition and the requirement of high-thickness laying of a needle machine and further ensure the high-quality and stable preparation of the alumina chopped strand mat. The invention can effectively improve the production efficiency and the production quality of the alumina chopped strand mat.
The invention provides an auxiliary alumina chopped strand mat forming air-laid device which comprises a cotton feeding trolley, wherein the cotton feeding trolley is connected with a comber, the comber is connected with a high cotton box through a fan pipeline, a channel device is arranged below the high cotton box, a multi-row needle roller set consisting of a plurality of needle rollers is arranged in the channel device, a negative pressure suction fan is arranged below the channel device, a conveying device is arranged between the negative pressure suction fan and the channel device, a pressing roller is arranged at an outlet of the channel device, and a needling machine is arranged at one side of the conveying device.
In one embodiment of the present invention, the conveying device is a belt drive, the belt drive comprises a conveying belt, the conveying belt is a mesh belt, and a plurality of mesh holes are arranged on the conveying belt.
In one embodiment of the invention, the cotton feeding trolley is provided with a precise weighing mechanism and comprises a cotton feeding bin and a cotton feeding roller, the cotton feeding bin of the cotton feeding trolley is connected with a combing machine, and the alumina chopped yarns are fed into the combing machine through the cotton feeding roller of the cotton feeding trolley.
In one embodiment of the invention, a bell mouth of the combing machine is connected with a fan pipeline, and the alumina chopped yarns combed by the combing machine are conveyed to a high cotton box; the compression roller is arranged at the outlet of the channel device and above the conveying device, and the conveying device is connected with the inlet of the needling machine.
In one embodiment of the invention, the rotation directions of two adjacent needle rollers in the duct device are opposite.
In one embodiment of the invention, the needle roller comprises a roller shaft, a roller barrel and needle pricks, the roller shaft penetrates through the roller barrel, and a plurality of needle pricks are uniformly arranged on the outer surface of the roller barrel.
The second purpose of the invention is to provide a method for assisting the forming of the alumina chopped strand mat, which adopts the auxiliary alumina chopped strand mat forming air-laid device and comprises the following steps:
(1) The alumina short cut yarn is precisely weighed by a cotton feeding trolley and sent to a combing machine for combing;
(2) Sending the carded yarns to a high cotton box through a fan pipeline;
(3) Then dispersed in a channel device through a plurality of groups of needle rollers and sucked by a negative pressure suction fan to fall to a bottom mesh belt for forming a net;
(4) And after the sizing by the compression roller, conveying the alumina chopped fiber felt to a needling machine by a conveying device for needling forming to obtain the alumina chopped fiber felt.
In one embodiment of the invention, the rotation speed of the needle roller in the step (3) is 200-600r/min; the speed of conveying the alumina chopped fiber web by the conveying device in the step (4) is 10mm/min.
In one embodiment of the invention, the frequency of the negative pressure suction fan in the step (3) is 5-20Hz, and the length of the alumina chopped yarn in the step (1) is 10-90mm.
In one embodiment of the invention, the alumina chopped strand mat in the step (4) has a thickness of 8-23mm and an areal density of 800-1800g/m 2 The surface density fluctuation value is 1-3%.
Advantageous effects
(1) On the premise of less fiber damage and wide applicable raw materials based on an air-laid method, a negative pressure suction fan is arranged below a channel device, a conveying device is arranged between the negative pressure suction fan and the channel device, the conveying device is in belt transmission, a conveying belt is a mesh belt, a plurality of meshes are arranged on the conveying belt, and the negative pressure suction fan can suck air in the channel device through the mesh belt, so that alumina chopped yarns in the channel device fall onto the mesh belt to form a web; the method avoids the damage of the traditional carding net to the fiber by introducing the air-laid method, so as to meet the needling condition of a needle machine and the requirement of high-thickness net formation, and further ensure the high-quality and stable preparation of the alumina chopped strand mat.
(2) The alumina chopped fiber can effectively reduce the problem that alumina fiber is broken and extruded into powder in the process of forming the net through the needle roller set and the negative pressure air suction net belt, and solves the difficulty of forming the net through the alumina fiber.
(3) The auxiliary alumina chopped strand mat forming air-laid device and method provided by the invention can effectively improve the production efficiency and the production quality of the alumina chopped strand mat, and are better than those of the alumina chopped strand matThe traditional preparation method can improve the production efficiency by 10-20 percent, and the product areal density can reach 1800g/m at most 2 And the uniformity and the stability of the product are obviously improved.
Drawings
FIG. 1 is a schematic structural view of an auxiliary alumina chopped strand mat forming air-laid device of the present invention;
FIG. 2 is a perspective view of the airlaid device of the present invention (with the feed hopper, combing machine, blower duct and needling machine removed);
fig. 3 is a perspective view of the needle roller according to the present invention.
Fig. 4 is a flow diagram of an auxiliary alumina chopped strand mat forming process of the present invention.
Wherein: 1. a cotton feeding trolley; 2. a combing machine; 3. a fan duct; 4. a high cotton box; 5. a needle roller; 51. a roll shaft; 52. a roller; 53. needling; 6. a corridor device; 7. pressing rollers; 8. a conveying device; 9. a negative pressure suction fan; 10. a needle machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, releasably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
Example 1
As shown in fig. 1-3, this embodiment provides an air-laid device for assisting forming of alumina chopped strand mat, including cotton feeding trolley 1, cotton feeding trolley 1 is connected with comber 2, comber 2 is connected with high hopper 4 through fan pipeline 3, the below of high hopper 4 is provided with channel device 6, be provided with many rows of needle roller sets of constituteing by a plurality of needle roller 5 in channel device 6, the below of channel device 6 is provided with negative pressure suction fan 9, be provided with conveyor 8 between negative pressure suction fan 9 and channel device 6, the exit of channel device 6 is provided with compression roller 7, one side of conveyor 8 sets up needling machine 10.
Further, conveyor 8 is belt drive, belt drive includes the conveyer belt, the conveyer belt is the guipure, has seted up a plurality of mesh on it, and negative pressure suction fan 9 can see through the guipure is induced drafted in to channel device 6, makes the interior short yarn whereabouts of alumina in channel device 6 become the net on the guipure.
Optionally, the cotton feeding trolley 1 is equipped with an accurate weighing mechanism, the cotton feeding trolley 1 comprises a cotton feeding bin (not shown in the figure) and a cotton feeding roller (not shown in the figure), the cotton feeding bin of the cotton feeding trolley 1 is connected with the combing machine 2, and the alumina chopped yarns are fed into the combing machine 2 through the cotton feeding roller of the cotton feeding trolley 1.
Optionally, the bell mouth of the combing machine 2 is connected with a fan duct 3, and the alumina chopped yarns combed by the combing machine 2 are conveyed to a high cotton box 4.
Optionally, the press roller 7 is disposed at the outlet of the duct device 6 and above the conveyor device 8, and the conveyor device 8 is connected to the inlet of the needling machine 10.
Optionally, the rotation directions of two adjacent needle rollers 5 in the duct device 6 are opposite, specifically, the rotation directions of two adjacent needle rollers 5 in the horizontal direction in the duct device 6 are opposite, and the rotation directions of two adjacent needle rollers 5 in the vertical direction are also opposite, optionally, the rotation speed of the needle rollers 5 is 200-600r/min, preferably 300-400r/min.
Optionally, there are four rows of needle roller sets consisting of several needle rollers 5 in the shaft means 6.
Optionally, the needle roller 5 comprises a roller shaft 51, a roller 52 and needle pricks 53, the roller shaft 51 penetrates through the roller 52, and a plurality of needle pricks 53 are uniformly arranged on the outer surface of the roller 52.
Optionally, the alumina chopped yarn length is 10-90mm, preferably 30-60mm; the raw material is domestic F72, C82 or M99 alumina fiber, preferably F72 and C82 domestic alumina fiber.
The working principle of the embodiment is as follows: the alumina chopped strand is precisely weighed by a cotton feeding trolley 1 and sent to a combing machine 2 for combing, the combed yarn is sent to a high cotton box 4 through a fan pipeline 3, then dispersed and dropped in a channel device 6 through a plurality of groups of needle rollers 5 to a bottom mesh belt 9 for forming a mesh, and an outlet of the mesh belt is shaped by a compression roller 7 and then sent to a needling machine 11 for needling forming through a conveying device 8 to obtain the alumina chopped strand mat.
Example 2
As shown in fig. 4, this embodiment provides an auxiliary alumina chopped strand mat forming method, which uses the auxiliary alumina chopped strand mat forming air-laid device provided in embodiment 1, and includes the following steps:
(1) The alumina short cut yarn is precisely weighed by a cotton feeding trolley and sent to a combing machine for combing;
(2) The carded yarn is sent to a high cotton box through a fan pipeline,
(3) Then the mixture is dispersed in a channel device through a plurality of groups of needle rollers and is sucked by a negative pressure suction fan to fall to a bottom mesh belt for forming a net;
(4) And after being shaped by a compression roller, the shaped alumina chopped strand mat is conveyed to a needle machine by a conveying device to be formed by needle punching to obtain the alumina chopped strand mat.
The auxiliary alumina chopped strand mat forming air-laid device and method provided by the invention realize the preparation of the heavy and heavy alumina chopped strand mat and improve the uniformity and stability in the preparation process of the alumina chopped strand mat.
Example 3
A process flow for preparing an alumina chopped strand mat comprises the following steps:
specifically, 50kg of domestic F72 alumina fiber (linear density 85 Tex) was taken out and fed into a cotton feeding cart at intervals of 20s at a feeding amount of 300. + -.1 g/time and a feeding accuracy of. + -.1 g/time. Further, the length of the chopped fiber sent to the high cotton box through the pipeline of the fan is 50mm, the rotating speed of the needle roller set is 400r/min, the frequency of the negative pressure fan is 20Hz, and the forward movement speed of the mesh belt is 10mm/min. Further, the speed of conveying the alumina chopped fiber web by the conveying device is 10mm/min, the alumina chopped fiber web is shaped by a press roll, sent to a needle machine for shaping and then wound, and the alumina chopped fiber felt of the embodiment 3 is obtained.
Comparative example 1
A process flow for preparing an alumina chopped strand mat comprises the following steps:
specifically, 50kg of domestic F72 alumina fiber (linear density 85 Tex) was taken out and fed into a cotton feeding cart at intervals of 20s at a feeding amount of 300. + -.1 g/time and a feeding accuracy of. + -.1 g/time. Further, the length of the chopped fiber sent to the high cotton box through the pipeline of the fan is 80mm, the rotating speed of the needle roller set is 400r/min, the frequency of the negative pressure fan is 20Hz, and the forward movement speed of the mesh belt is 10mm/min. Further, the alumina chopped fiber web conveyed by the conveying device at a speed of 10mm/min is shaped by a press roll, conveyed to a needle punching machine for shaping and then wound, so that the alumina chopped fiber felt of the comparative example 1 is obtained.
Comparative example 2
A process flow for preparing an alumina chopped strand mat comprises the following steps:
specifically, 50kg of domestic F72 alumina fiber (linear density 85 Tex) was taken out and fed into a cotton feeding cart at intervals of 25s at a feed rate of 200. + -.1 g/time and a feed accuracy of. + -.1 g/time. Further, the length of the chopped fiber sent to the high cotton box through the pipeline of the fan is 50mm, the rotating speed of the needle roller set is 200r/min, the frequency of the negative pressure fan is 20Hz, and the forward movement speed of the mesh belt is 10mm/min. Further, the speed of conveying the alumina chopped fiber web by the conveying device is 10mm/min, the alumina chopped fiber web is shaped by a press roll, conveyed to a needle punching shape and then wound, and the alumina chopped fiber felt of the comparative example 2 is obtained.
Comparative example 3
A process flow for preparing an alumina chopped strand mat comprises the following steps:
specifically, 50kg of domestic F72 alumina fiber (linear density 85 Tex) was taken out and fed into a cotton feeding cart at intervals of 20s at a feed rate of 200. + -.1 g/time and a feed accuracy of. + -.1 g/time. Further, the length of the chopped fiber sent to the high cotton box through the pipeline of the fan is 80mm, the rotating speed of the needle roller set is 200r/min, the frequency of the negative pressure fan is 20Hz, and the forward movement speed of the mesh belt is 10mm/min. Further, the speed of conveying the alumina chopped fiber web by the conveying device is 10mm/min, the alumina chopped fiber web is shaped by a press roll, conveyed to a needle punching shape and then wound, and the alumina chopped fiber felt of the comparative example 3 is obtained.
Example 4
A process flow for preparing an alumina chopped strand mat comprises the following steps:
specifically, 30kg of domestic C82 alumina fiber (linear density 120 Tex) was taken out and fed into a cotton feeding cart at 30s intervals at a feeding amount of 100. + -.1 g/time and a feeding accuracy of. + -.1 g/time. Further, the length of the chopped fiber conveyed to the high cotton box through a fan pipeline is 30mm, the rotating speed of the needle roller set is 600r/min, the frequency of the negative pressure fan is 20Hz, and the forward movement speed of the mesh belt is 20mm/min. Further, the speed of conveying the alumina chopped fiber web by the conveying device is 20mm/min, and the alumina chopped fiber web is shaped by a press roll, conveyed to a needle punching machine for shaping and then wound, so that the alumina chopped fiber felt of the embodiment 4 is obtained.
Comparative example 4
A process flow for preparing an alumina chopped strand mat comprises the following steps:
specifically, 30kg of domestic C82 alumina fiber (linear density 120 Tex) was taken out and fed into a cotton feeding cart at 30s intervals at a feeding amount of 100. + -.1 g/time and a feeding accuracy of. + -.1 g/time. Further, the length of the chopped fiber sent to the high cotton box through the pipeline of the fan is 60mm, the rotating speed of the needle roller set is 400r/min, the frequency of the negative pressure fan is 20Hz, and the forward movement speed of the mesh belt is 10mm/min. Further, the alumina chopped fiber web conveyed by the conveying device at a speed of 10mm/min is shaped by a press roll, conveyed to a needle punching machine for shaping and then wound, so that the alumina chopped fiber felt of the comparative example 4 is obtained.
Comparative example 5
A process flow for preparing an alumina chopped strand mat comprises the following steps:
specifically, 30kg of domestic C82 alumina fiber (linear density 120 Tex) was taken out and fed into a cotton feeding cart at an interval of 20 seconds at a feed rate of 200. + -.1 g/time and a feed accuracy of. + -.1 g/time. Further, the length of the chopped fiber sent to the high cotton box through the pipeline of the fan is 60mm, the rotating speed of the needle roller set is 400r/min, the frequency of the negative pressure fan is 20Hz, and the forward movement speed of the mesh belt is 10mm/min. Further, the speed of conveying the alumina chopped fiber web by the conveying device is 10mm/min, the alumina chopped fiber web is shaped by a press roll, conveyed to a needle punching shape and then wound, and the alumina chopped fiber felt of the comparative example 5 is obtained.
The alumina chopped strand mats obtained in examples 3 to 4 and comparative examples 1 to 5 were sampled at 50cm from the head and tail of the mat and at 25cm from the middle, and were divided into test groups 1 to 5, with reference to national standards of the people's republic of china GB/T9914.3-2013/ISO 3374:2000 "reinforced article test method part 3: determination of mass per unit area, the areal density test was conducted under the same conditions and the thickness thereof was measured with a thickness meter, and the results of the test are shown in the following table 1:
TABLE 1 test results of examples 3-4 and comparative examples 1-5
As can be seen from Table 1, the auxiliary alumina chopped strand mat forming air-laid device and method can be used for preparing alumina chopped strands with different surface densities and thicknesses through raw material selection and process parameter adjustmentThe surface density and the thickness of the chopped aluminum oxide fiber felt prepared by the invention break through 800g/m prepared by the traditional method 2 And 12mm, the preparation of the large-thickness and heavy-weight alumina chopped strand mat is realized, and the surface density fluctuation value (CV value) is far lower than that of the prior art, which shows that the preparation method provided by the invention improves the uniformity and stability of the net mat.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides an auxiliary alumina chopped strand mat air-laid device that takes shape, its characterized in that, including feeding the cotton dolly, it is connected with the comber to feed the cotton dolly, the comber has high hopper through fan pipe connection, the below of high hopper is provided with the corridor device, be provided with the multirow needle roller group of constituteing by a plurality of needle roller in the corridor device, the below of corridor device is provided with the negative pressure suction fan, be provided with conveyor between negative pressure suction fan and the corridor device, the exit of corridor device is provided with the compression roller, one side of conveyor sets up the needle loom.
2. The auxiliary alumina chopped strand mat forming air-laying device as claimed in claim 1, wherein said conveying device is a belt drive, said belt drive comprises a conveyor belt, said conveyor belt is a mesh belt, and a plurality of mesh holes are opened on said conveyor belt.
3. The auxiliary alumina chopped strand mat forming air-laying device as claimed in claim 2, wherein the cotton feeding trolley is provided with a precise weighing mechanism and comprises a cotton feeding bin and a cotton feeding roller, the cotton feeding bin of the cotton feeding trolley is connected with the combing machine, and alumina chopped yarns are fed into the combing machine through the cotton feeding roller of the cotton feeding trolley.
4. The auxiliary alumina chopped strand mat forming air-laying device of claim 3, wherein the bell mouth of the comber is connected with a fan pipeline to convey the alumina chopped yarns combed by the comber to a high cotton box; the compression roller is arranged at the outlet of the channel device and above the conveying device, and the conveying device is connected with the inlet of the needling machine.
5. The auxiliary alumina chopped strand mat forming air-laying device of claim 4, wherein the rotation directions of two adjacent needle rolls in said shaft device are opposite.
6. The auxiliary alumina chopped strand mat forming air-laid device as claimed in claim 5, wherein the needle rollers comprise roller shafts, rollers and needle prickings, the roller shafts penetrate through the rollers, and a plurality of needle prickings are uniformly arranged on the outer surface of the rollers.
7. A method of assisting in the formation of an alumina chopped strand mat, wherein the method employs the apparatus of any of claims 1-6 for assisting in the formation of an air-laid web of alumina chopped strand mat, comprising the steps of:
(1) The alumina short cut yarn is precisely weighed by a cotton feeding trolley and sent to a combing machine for combing;
(2) Sending the carded yarns to a high cotton box through a fan pipeline;
(3) Then the mixture is dispersed in a channel device through a plurality of groups of needle rollers and is sucked by a negative pressure suction fan to fall to a bottom mesh belt for forming a net;
(4) And after the sizing by the compression roller, conveying the alumina chopped fiber felt to a needling machine by a conveying device for needling forming to obtain the alumina chopped fiber felt.
8. The method of assisting in forming an alumina chopped strand mat according to claim 7, wherein the rotation speed of the needle roller of step (3) is 200-600r/min; the speed of conveying the alumina chopped fiber web by the conveying device in the step (4) is 10mm/min.
9. The method for assisting in forming an alumina chopped strand mat according to claim 7, wherein the frequency of the negative pressure suction fan of step (3) is 5-20Hz, and the length of the alumina chopped strands of step (1) is 10-90mm.
10. The method as claimed in claim 7, wherein the alumina chopped strand mat in the step (4) has a thickness of 8-23mm and an areal density of 800-1800g/m 2 The surface density fluctuation value is 1-3%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116288945A (en) * | 2023-05-04 | 2023-06-23 | 河北恒永滤材科技有限公司 | Nonwoven air-laid device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116288945A (en) * | 2023-05-04 | 2023-06-23 | 河北恒永滤材科技有限公司 | Nonwoven air-laid device |
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