A process for the production of a flame-retardant blended yarn

Abstract

The application discloses a production method of flame-retardant blended yarn, comprising the following steps: (1) fiber pretreatment; (2) blending into sliver; (3) blending into yarn. The patent is characterized in that: the polyethylene terephthalate fiber and the seaweed fiber are respectively grabbed by the initial grabbing cotton, the preliminary opening of the fibers is realized in the grabbing, the opened polyethylene terephthalate fiber and seaweed fiber are jointly conveyed to the pretreatment grabbing cotton machine, the layering is carried out by the layering pretreatment device in the pretreatment grabbing cotton machine, and the synchronous pretreatment is realized in the layering process, so that the pretreatment efficiency before the fiber mixing is effectively improved, then the grabbing cotton device is used for simultaneous grabbing, so that the mixing of the two pretreated fibers is realized in the grabbing, the mixed fibers after the grabbing are simply opened and cleaned for the mixing and opening again, so that the uniform mixing of the two fibers is realized, and then the development of the blended yarn with excellent flame-retardant performance and wearing performance is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new spinning technology, in particular to a production method of flame-retardant blended yarn. BACKGROUND

[0002] Both polyamide fibers and seaweed fibers are functional fibers with intrinsic flame retardance. The polyamide fiber is a dry-spun polyimide fiber independently developed by Jiangsu Aoshen New Material Co., Ltd., which is intrinsically flame-retardant, has an ultimate oxygen index of 38, does not melt and drip at high temperature, has extremely low combustion smoke and is non-toxic, and has many excellent properties such as mechanical properties, natural antibacterial properties and far infrared properties. The seaweed fiber is intrinsically flame-retardant, has an ultimate oxygen index of 40, does not melt and drip when burning, is environmentally friendly and degradable, is moisture-permeable and breathable, and has good skin friendliness, but has low strength and poor cohesion, and requires high spinning requirements. SUMMARY

[0003] The purpose of the present application is to provide a production method of flame-retardant blended yarn to solve the problems in the prior art.

[0004] The present application provides a production method of flame-retardant blended yarn, comprising the following steps:

[0005] (1) Fiber pretreatment: the selected polyethylene terephthalate fibers and seaweed fibers with the same average length and linear density are respectively initially grabbed and opened by a disc type initial grabbing machine, and then are collectively transported to a pretreatment grabbing machine, the pretreatment grabbing machine includes a ring-shaped workbench, a grabbing device and a layering pretreatment device are arranged in the slide of the workbench, and the grabbing device and the layering pretreatment device are arranged on different sides of the workbench respectively, the layering pretreatment device includes polyethylene terephthalate layering pretreatment devices and seaweed layering pretreatment devices which are the same in structure, the polyethylene terephthalate fibers and the seaweed fibers grabbed by the initial grabbing machine are transported to the polyethylene terephthalate layering pretreatment devices and the seaweed layering pretreatment devices through pipelines respectively, and under the action of the polyethylene terephthalate layering pretreatment devices and the seaweed layering pretreatment devices which reciprocate along the workbench, the polyethylene terephthalate fibers and the seaweed fibers are respectively layered on the weighing device below, the antistatic spraying device on the polyethylene terephthalate layering pretreatment device sprays the polyethylene terephthalate fibers with the antistatic agent mixed solution layer by layer during the layering process, the oil agent spraying device on the seaweed layering pretreatment device sprays the seaweed fibers with the cohesion enhancing oil agent layer by layer, and the weighing device below realizes the layering of the weights in the required mixing ratio of the two, so as to form the polyethylene terephthalate fiber layer and the seaweed fiber layer which are pretreated and have the same height and are in close contact with each other, after stacking for 24 hours, the grabbing device rotates to the side where the polyethylene terephthalate and seaweed fiber layering is completed through the arc-shaped side of the workbench, the polyethylene terephthalate fibers and the seaweed fibers are simultaneously grabbed according to the mixing ratio under the action of the grabbing device which reciprocates along the workbench, and at the same time, the layering pretreatment device rotates to the side where the polyethylene terephthalate and seaweed fiber grabbing is completed through the arc-shaped other side of the workbench, the polyethylene terephthalate fibers and the seaweed fibers on this side are pretreated and layered under the action of the polyethylene terephthalate layering pretreatment devices and the seaweed layering pretreatment devices which reciprocate along the workbench;

[0006] (2) Mixed sliver: the polyethylene terephthalate fibers and the seaweed fibers grabbed by the grabbing device are continuously fed into a carding machine provided with a feeding cotton box after automatic blending, the input mixed fibers are uniformly transported to the carding machine after being arranged by the feeding cotton box, in the carding machine, the mixed fibers are made into mixed fiber slivers through holding opening, free carding, coagulation into a web and convergence into a sliver;

[0007] (3) Spun yarn: the mixed fiber slivers are made into mixed slivers with reduced weight unevenness and improved fiber straightness through two-dose sliver arrangement, the mixed slivers are made into blended roving with a certain internal friction field, and the blended roving is made into the required flame-retardant blended yarn through spinning.

[0008] The production method of the flame-retardant blended yarn as described above, preferably, the workbench comprises a front workbench and a rear workbench, the front workbench and the rear workbench are identical in structure, the front workbench and the rear workbench are hollow cuboids, the front workbench and the rear workbench are arranged in parallel from front to back, the front workbench and the rear workbench are placed on the ground, a sliding track is arranged along the length direction of the upper side of the front workbench and the rear workbench, the sliding track comprises a first track and a second track arranged in parallel, a pipeline connecting seam is opened on the upper side of the front workbench and the rear workbench between the first track and the second track, the left sides of the front workbench and the rear workbench are naturally connected through a picking workbench, the picking workbench is hollow and has an arc structure protruding to the left, a picking pipeline connecting port is opened on the outer side of the picking workbench, a sliding track is arranged along the arc direction of the upper side of the picking workbench, the two ends of the sliding track of the picking workbench are naturally connected with the sliding tracks of the front workbench and the rear workbench, respectively, a pipeline connecting seam is opened on the upper side of the picking workbench between the first track and the second track of the sliding track, the two ends of the pipeline connecting seam of the picking workbench are naturally connected with the pipeline connecting seams of the front workbench and the rear workbench, respectively, the right sides of the front workbench and the rear workbench are naturally connected through a pretreatment workbench, the pretreatment workbench is hollow and has an arc structure protruding to the right, a sliding track is arranged along the arc direction of the upper side of the pretreatment workbench, the two ends of the sliding track of the pretreatment workbench are naturally connected with the sliding tracks of the front workbench and the rear workbench, respectively, a pipeline connecting seam is opened on the upper side of the pretreatment workbench between the first track and the second track of the sliding track, the two ends of the pipeline connecting seam of the pretreatment workbench are naturally connected with the pipeline connecting seams of the front workbench and the rear workbench, respectively, the sliding tracks of the front workbench, the picking workbench, the rear workbench and the pretreatment workbench are connected to form a complete workbench track, and the pipeline connecting seams of the front workbench, the picking workbench, the rear workbench and the pretreatment workbench are connected to form a complete workbench pipeline connecting seam.

[0009] The production method of the flame-retardant blended yarn as described above, preferably, a weighing device is arranged on the ground outside the front workbench and the rear workbench, respectively, the weighing device comprises first weighing platforms and second weighing platforms which are completely identical, and the first weighing platforms and the second weighing platforms are close to each other.

[0010] The production method of the flame-retardant blended yarn as described above, preferably, the laying-preprocessing device comprises the same structure of the aramid laying-preprocessing device and the seaweed laying-preprocessing device, the aramid laying-preprocessing device and the seaweed laying-preprocessing device comprise a preprocessing connecting bin, four corners of the lower side of the preprocessing connecting bin are respectively provided with preprocessing sliding rollers, a first pipeline input port is opened on the upper side of the preprocessing connecting bin, a liquid storage tank is arranged above the upper side of the preprocessing connecting bin, an output laying tower is arranged on the side of the preprocessing connecting bin facing away from the workbench, the inner side of the output laying tower is liftably connected with the side of the preprocessing connecting bin facing away from the workbench, the output laying tower is driven by the corresponding transmission structure to ascend or descend along the height direction of the side of the preprocessing connecting bin facing away from the workbench, a second pipeline connecting port is opened on the inner side of the output laying tower, and a fiber input pipe is arranged on the second pipeline connecting port.

[0011] The production method of the flame-retardant blended yarn as described above, preferably, the height and length of the outer side of the output laying tower are respectively smaller than the height and length of the inner side, a closing plate is arranged on the downward side of the output laying tower, the closing plate comprises the same structure of the left closing plate and the right closing plate, the left closing plate and the right closing plate are both right-angled triangular structures, the hypotenuse of the left closing plate is fixedly connected with the left side of the downward side of the output laying tower, the hypotenuse of the right closing plate is fixedly connected with the right side of the downward side of the output laying tower, a rectangular open laying port is formed on the downward side of the output laying tower, an output roller pair is arranged in the laying port of the lower side of the output laying tower, the output roller pair fully covers the lower side of the output laying tower, the output roller pair comprises the same structure of the first output roller and the second output roller, the first output roller and the second output roller are rotatably connected with the laying port, the first output roller and the second output roller are driven by the corresponding transmission mechanism to rotate at the same speed and in different directions, the first output roller on the left side rotates clockwise, the first output roller on the right side rotates counterclockwise, a left spraying pipe is arranged below the left closing plate, a right spraying pipe is arranged below the right closing plate, the left spraying pipe and the right spraying pipe are connected with the liquid storage tank through a liquid conveying pipe, and the outer side of the output laying tower is connected with the corresponding negative pressure system through a filter screen.

[0012] The production method of the flame-retardant blended yarn as described above, preferably, the preprocessing sliding rollers are rotatably connected with the lower side of the preprocessing connecting bin in the radial direction and the axial direction, and the preprocessing sliding rollers are driven by the corresponding transmission mechanism to slide along the workbench track.

[0013] The production method of the flame-retardant blended yarn as described above, wherein preferably, a liquid storage tank is arranged above the upper side of the pre-treatment connecting bin, an antistatic agent mixture is placed in the liquid storage tank of the aramid layer pre-treatment device, and a cohesion-enhancing oil agent is placed in the liquid storage tank of the seaweed layer pre-treatment device.

[0014] The production method of the flame-retardant blended yarn as described above, wherein preferably, the extended fiber input pipe of the aramid layer pre-treatment device is rotatably connected with the input pipe of the aramid fiber initial picker, the extended fiber input pipe of the seaweed layer pre-treatment device is rotatably connected with the input pipe of the seaweed fiber initial picker, and the rotatable connection is kept in a closed state.

[0015] The production method of the flame-retardant blended yarn as described above, wherein preferably, the picking device comprises a picking connecting bin and a picking tower, sliding rollers are arranged on the four corners of the lower side of the picking connecting bin, a picking tower is arranged on the side of the picking connecting bin facing away from the workbench, the inward side of the picking tower is liftably connected with the side of the picking connecting bin facing away from the workbench, a third pipe connecting port is opened on the inward side of the picking tower, a fiber output pipe is arranged on the third pipe connecting port, a picking beater is arranged in the picking tower, the picking beater comprises a first picking beater and a second picking beater which are identical in structure, the first picking beater and the second picking beater are kept at a certain distance apart, the first picking beater and the second picking beater are rotatably connected with the inner side of the picking tower, the first picking beater and the second picking beater are driven by corresponding transmission mechanisms to rotate at the same speed but in different directions, the first picking beater on the left side rotates counterclockwise, and the second picking beater on the right side rotates clockwise, fiber picking cloths are arranged along the outer circumferences of the first picking beater and the second picking beater.

[0016] The production method of the flame-retardant blended yarn as described above, wherein preferably, the picking tower is of a hollow structure, the outward side of the picking tower is a rectangle kept vertically, the downward side of the picking tower is an open rectangle kept horizontally, pressing strips are arranged on the downward side of the picking tower at equal intervals, the pressing strips are convex arc structures, the adjacent two pressing strips are kept at a certain distance apart, the inward side of the picking tower is a rectangle kept vertically, and the height of the outward side of the picking tower is less than the height of the inward side.

[0017] The patent realizes the initial opening of the fibers in the grabbing by grabbing the polyethylene fibers and the seaweed fibers respectively, the polyethylene fibers and the seaweed fibers after opening are transported to the pretreatment grabbing machine together, the fibers are laid and pretreated synchronously in the process of laying in the pretreatment laying device in the pretreatment grabbing machine, thereby effectively improving the pretreatment efficiency before the mixing of the fibers, then the fibers are grabbed simultaneously by the grabbing device, thereby realizing the mixing of the two pretreated fibers in the grabbing, the mixed fibers after the grabbing are mixed and opened again by the simple opening device, thereby realizing the uniform mixing of the two fibers, and the development of the blended yarn with excellent flame retardant performance and wearing performance is realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The patent is a schematic diagram of the structure of the pretreatment grabbing machine;

[0019] Figure 2 The patent is a schematic diagram of the cross-sectional structure of the output laying tower.

[0020] BRIEF DESCRIPTION OF DRAWINGS: 1- workbench, 2- rear workbench, 3- front workbench, 4- grabbing workbench, 5- pretreatment workbench, 6- first track, 7- second track, 8- pipeline connection joint, 9- first weighing platform, 10- second weighing platform, 11- grabbing device, 12- grabbing connection bin, 13- grabbing sliding roller, 14- grabbing tower, 15- first grabbing beater, 16- second grabbing beater, 17- fiber grabbing cloth, 18- fiber output pipe, 19- polyethylene laying pretreatment device, 20- seaweed laying pretreatment device, 21- pretreatment connection bin, 22- pretreatment sliding roller, 23- output laying tower, 24- first output roller, 25- second output roller, 26- left spraying pipe, 27- right spraying pipe, 28- filter screen, 29- liquid storage tank, 30- fiber input pipe, 31- left closing plate, 32- right closing plate. DETAILED DESCRIPTION

[0021] The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be explained as a limitation of the present application.

[0022] The application provides a production method of flame-retardant blended yarn, and the method comprises the following steps: selecting nylon fibers and seaweed fibers with the same average length and linear density, respectively using a disc type initial grabbing machine for initial grabbing and opening, and then conveying the fibers to a pretreatment grabbing machine, the pretreatment grabbing machine comprises a ring-shaped workbench 1, a grabbing device 11 and a layering pretreatment device are arranged in the slide of the workbench 1, and the grabbing device 11 and the layering pretreatment device are arranged on different sides of the workbench 1, the layering pretreatment device comprises nylon layering pretreatment devices 19 and seaweed layering pretreatment devices 20 which are the same in structure, the nylon fibers and the seaweed fibers grabbed by the initial grabbing machine are conveyed to the nylon layering pretreatment devices 19 and the seaweed layering pretreatment devices 20 through pipelines, and under the action of the nylon layering pretreatment devices 19 and the seaweed layering pretreatment devices 20 which reciprocate along the workbench 1, the nylon fibers and the seaweed fibers are layered on the lower weighing device, respectively, in the layering process, the antistatic spraying device on the nylon layering pretreatment device 19 sprays the nylon fibers with the antistatic agent mixture layer by layer, the oil agent spraying device on the seaweed layering pretreatment device 20 sprays the seaweed fibers with the cohesion-enhancing oil agent layer by layer, and the weighing device below realizes the layering of the weight of the two fibers in the required mixing ratio, so that the pretreated nylon fiber layer and the seaweed fiber layer which are highly consistent and closely contact each other are formed, after stacking for 24 hours, the grabbing device 11 rotates to the side where the layering of the nylon fibers and the seaweed fibers is completed through the arc-shaped side of the workbench 1, and under the action of the grabbing device 11 which reciprocates along the workbench 1, the nylon fibers and the seaweed fibers are grabbed according to the mixing ratio at the same time, meanwhile, the layering pretreatment device rotates to the side where the grabbing of the nylon fibers and the seaweed fibers is completed through the arc-shaped other side of the workbench 1, and under the action of the nylon layering pretreatment devices 19 and the seaweed layering pretreatment devices 20 which reciprocate along the workbench 1, the pretreatment and layering of the nylon fibers and the seaweed fibers on the side are completed, the nylon fibers and the seaweed fibers grabbed by the grabbing device 11 are continuously fed into a carding machine provided with a feeding cotton box after automatic blending, the input mixed fibers are evenly conveyed to the carding machine after arrangement of the feeding cotton box, in the carding machine, the mixed fibers are held and opened, freely combed, coagulated into a web, and converged into a sliver to obtain a mixed fiber sliver, the mixed fiber sliver is arranged through two drawing processes to obtain a mixed roving with reduced weight unevenness and improved fiber straightness, the mixed roving is arranged to obtain a blended roving with a certain internal friction field, and the blended roving is arranged to obtain the required flame-retardant blended yarn.

[0023] Specifically, the method comprises the following steps:

[0024] (1) Fiber pretreatment: selecting nylon fibers and seaweed fibers with the same average length and linear density as raw materials, and respectively using an initial grabbing machine for initial grabbing and opening, the initial grabbing machine is disc type, and the grabbed nylon fibers and seaweed fibers are conveyed to a pretreatment grabbing machine through a conveying pipeline.

[0025] Referring to Figure 1 As shown in the figure, the pre-treatment picker includes a workbench 1, the workbench 1 is of a ring structure, the workbench 1 includes a front workbench 3 and a rear workbench 2, the front workbench 3 and the rear workbench 2 are of the same structure, the front workbench 3 and the rear workbench 2 are hollow cuboids, the front workbench 3 and the rear workbench 2 are arranged in parallel from front to back, the front workbench 3 and the rear workbench 2 are placed on the ground, a sliding track is arranged along the length direction of the upper side of the front workbench 3 and the rear workbench 2, the sliding track includes a first track 6 and a second track 7 arranged in parallel, a pipeline connecting seam 8 is opened on the upper side of the front workbench 3 and the rear workbench 2 between the first track 6 and the second track 7, a weighing device is arranged on the ground outside the front workbench 3 and the rear workbench 2 respectively, the weighing device includes a first weighing platform 9 and a second weighing platform 10 which are completely the same, the first weighing platform 9 and the second weighing platform 10 are in close contact, the left side of the front workbench 3 and the rear workbench 2 are naturally connected through a picking workbench 4, the picking workbench 4 is of a hollow and left convex arc structure, a picking pipeline connecting port is opened on the outer side of the picking workbench 4, a sliding track is arranged along the arc direction of the upper side of the picking workbench 4, the two ends of the sliding track of the picking workbench 4 are naturally connected with the sliding tracks of the front workbench 3 and the rear workbench 2 respectively, a pipeline connecting seam 8 is opened on the upper side of the picking workbench 4 between the first track 6 and the second track 7, the two ends of the pipeline connecting seam 8 of the picking workbench 4 are naturally connected with the pipeline connecting seams 8 of the front workbench 3 and the rear workbench 2 respectively, the right side of the front workbench 3 and the rear workbench 2 is naturally connected through a pre-treatment workbench 51, the pre-treatment workbench 51 is of a hollow and right convex arc structure, a sliding track is arranged along the arc direction of the upper side of the pre-treatment workbench 51, the two ends of the sliding track of the pre-treatment workbench 51 are naturally connected with the sliding tracks of the front workbench 3 and the rear workbench 2 respectively, a pipeline connecting seam 8 is opened on the upper side of the pre-treatment workbench 51 between the first track 6 and the second track 7, the two ends of the pipeline connecting seam 8 of the pre-treatment workbench 51 are naturally connected with the pipeline connecting seams 8 of the front workbench 3 and the rear workbench 2 respectively, the sliding tracks of the front workbench 3, the picking workbench 4, the rear workbench 2 and the pre-treatment workbench 51 are connected to form a complete workbench 1 track, the pipeline connecting seams 8 of the front workbench 3, the picking workbench 4, the rear workbench 2 and the pre-treatment workbench 51 are connected to form a complete workbench 1 pipeline connecting seam 8, a picking device 11 and a layer pre-treatment device are arranged on the workbench 1 track of the workbench 1.

[0026] The layer pre-treatment device includes a nylon layer pre-treatment device 19 and a seaweed layer pre-treatment device 20 which are structurally identical, and the nylon layer pre-treatment device 19 and the seaweed layer pre-treatment device 20 include a pre-treatment connecting bin 21 and an output layer tower 23, the pre-treatment connecting bin 21 is a hollow cuboid, the side of the pre-treatment connecting bin 21 facing outside the workbench 1 is open, four corners of the lower side of the pre-treatment connecting bin 21 are respectively provided with pre-treatment sliding rollers 22, the pre-treatment sliding rollers 22 and the lower side of the pre-treatment connecting bin 21 are connected and can simultaneously rotate radially and axially, the pre-treatment sliding rollers 22 are driven by the corresponding transmission mechanism to slide along the track of the workbench 1, a first pipeline input port is opened on the upper side of the pre-treatment connecting bin 21, a liquid storage tank 29 is arranged above the upper side of the pre-treatment connecting bin 21, an antistatic agent mixture is placed in the liquid storage tank 29 of the nylon layer pre-treatment device 19, and a cohesion-enhancing oil agent is placed in the liquid storage tank 29 of the seaweed layer pre-treatment device 20, the output layer tower 23 is arranged on the side of the pre-treatment connecting bin 21 facing outside the workbench 1, the output layer tower 23 is a hollow structure, the outward side of the output layer tower 23 is a long rectangle which is kept vertical and open, the downward side of the output layer tower 23 is kept horizontal and open, the inward side of the output layer tower 23 is a long rectangle which is kept vertical, the inward side of the output layer tower 23 and the side of the pre-treatment connecting bin 21 facing outside the workbench 1 are connected and can be lifted, the output layer tower 23 is driven by the corresponding transmission structure to rise or fall along the height direction of the side of the pre-treatment connecting bin 21 facing outside the workbench 1, a second pipeline connecting port is opened on the inward side of the output layer tower 23, a fiber input pipe 30 is arranged on the second pipeline connecting port, the fiber input pipe 30 is a flexible hose, the fiber input pipe 30 extends out after passing through the first pipeline input port, the fiber input pipe 30 of the nylon layer pre-treatment device 19 and the input pipeline of the nylon fiber initial grabbing machine are connected and can rotate, the fiber input pipe 30 of the seaweed layer pre-treatment device 20 and the input pipeline of the seaweed fiber initial grabbing machine are connected and can rotate, and the rotatable connection is kept in a closed state, the height and length of the outward side of the output layer tower 23 are respectively less than the height and length of the inward side.

[0027] Referring to Figure 2As shown, the downward side of the output layering tower 23 is provided with a closing plate, which includes a left closing plate 31 and a right closing plate 32 of the same structure, both of which are of right triangle structure, the hypotenuse of the left closing plate 31 is fixedly connected with the left side of the downward side of the output layering tower 23, and the hypotenuse of the right closing plate 32 is fixedly connected with the right side of the downward side of the output layering tower 23, so as to form an open layering port of rectangle on the downward side of the output layering tower 23, and an output roller pair is arranged in the layering port of the lower side of the output layering tower 23, which fully covers the lower side of the output layering tower 23, and the output roller pair includes a first output roller 24 and a second output roller 25 of the same structure, which are rotatably connected with the layering port, and are driven by corresponding transmission mechanisms to rotate at the same speed and in different directions, the first output roller 24 on the left side rotates clockwise, and the first output roller 24 on the right side rotates counterclockwise, a left spraying pipe 26 is arranged below the left closing plate 31, and a right spraying pipe 27 is arranged below the right closing plate 32, the left spraying pipe 26 and the right spraying pipe 27 are connected with the liquid storage tank 29 through a liquid conveying pipe, and the outward side of the output layering tower 23 is connected with a corresponding negative pressure system through a filter screen 28.

[0028] The cotton grabbing device 11 comprises a cotton grabbing connecting bin 12 and a cotton grabbing tower 14. The cotton grabbing connecting bin 12 is a hollow cuboid, and the side of the cotton grabbing connecting bin 12 facing out of the workbench 1 is open. Four corners of the lower side of the cotton grabbing connecting bin 12 are respectively provided with cotton grabbing sliding rollers 13, which are connected with the lower side of the cotton grabbing connecting bin 12 and can rotate radially and axially at the same time. The cotton grabbing sliding rollers 13 are driven by the corresponding transmission mechanism to slide along the track of the workbench 1. The cotton grabbing tower 14 is arranged on the side of the cotton grabbing connecting bin 12 facing out of the workbench 1. The cotton grabbing tower 14 is a hollow structure. The outer side of the cotton grabbing tower 14 is a rectangle and remains vertical. The downward side of the cotton grabbing tower 14 remains horizontal and is an open rectangle. Pressing strips are arranged at equal intervals on the downward side of the cotton grabbing tower 14. The pressing strips are downward convex arc structures, and a certain interval is maintained between two adjacent pressing strips to form a fiber extension space. The inner side of the cotton grabbing tower 14 is a rectangle and remains vertical. The inner side of the cotton grabbing tower 14 is connected with the side of the cotton grabbing connecting bin 12 facing out of the workbench 1 in a lifting manner. The cotton grabbing tower 14 is driven by the corresponding transmission structure to ascend or descend along the height direction of the side of the cotton grabbing connecting bin 12 facing out of the workbench 1. A third pipeline connecting port is arranged on the inner side of the cotton grabbing tower 14. A fiber output pipe 18 is arranged on the third pipeline connecting port. The fiber output pipe 18 is a flexible pipe with an extendable structure. The fiber output pipe 18 extends out of the workbench 1 after passing through the cotton grabbing pipe connecting port of the cotton grabbing workbench 4. The fiber output pipe 18 extending out of the workbench 1 is connected with the front machine table. The height of the outer side of the cotton grabbing tower 14 is less than the height of the inner side. A cotton grabbing beater is arranged in the cotton grabbing tower 14. The cotton grabbing beater comprises a first cotton grabbing beater 15 and a second cotton grabbing beater 16 which are the same in structure. A certain interval is maintained between the first cotton grabbing beater 15 and the second cotton grabbing beater 16. The first cotton grabbing beater 15 and the second cotton grabbing beater 16 are rotatably connected with the inner side of the cotton grabbing tower 14. The first cotton grabbing beater 15 and the second cotton grabbing beater 16 are driven by the corresponding transmission mechanism to rotate at the same speed and in different directions. The first cotton grabbing beater 15 located on the left side rotates counterclockwise, and the second cotton grabbing beater 16 located on the right side rotates clockwise. Cotton grabbing card clothing 17 is arranged along the outer circumferences of the first cotton grabbing beater 15 and the second cotton grabbing beater 16.

[0029] In use, initially, the cotton grabbing device 11 is arranged at the front workbench 3 or the rear workbench 2 of the workbench 1 and is in a stopped working state, and the aramid fiber layer pretreatment device 19 and the seaweed fiber layer pretreatment device 20 are arranged at the rear workbench 2 or the front workbench 3 of the workbench 1 and keep a certain distance between the aramid fiber layer pretreatment device 19 and the seaweed fiber layer pretreatment device 20, according to the required mixing ratio of aramid fibers and seaweed fibers and the height of the required layer, the required weights of aramid fibers and seaweed fibers for each layer are arranged on the first weighing platform 9 and the second weighing platform 10 respectively, and at this time, the output layer tower 23 of the aramid fiber layer pretreatment device 19 is located directly above the first weighing platform 9, the output layer tower 23 of the seaweed fiber layer pretreatment device 20 is located directly above the second weighing platform 10, the aramid fibers grabbed by the initial cotton grabbing machine are adsorbed by the negative pressure in the negative pressure system of the output layer tower 23 of the aramid fiber layer pretreatment device 19 and enter the output layer tower 23 of the aramid fiber layer pretreatment device 19 through the fiber input pipe 30, the seaweed fibers grabbed by the initial cotton grabbing machine are adsorbed by the negative pressure in the negative pressure system of the output layer tower 23 of the seaweed fiber layer pretreatment device 20 and enter the output layer tower 23 of the seaweed fiber layer pretreatment device 20 through the fiber input pipe 30, the aramid fibers or seaweed fibers entering the output layer tower 23 are output under the driving of the output roller pair, due to the structural design of the output layer tower 23, the aramid fibers or seaweed fibers are more uniformly distributed along the length direction of the output roller pair, in the output process of the aramid fibers or seaweed fibers, the pretreatment sliding roller 22 is driven by the corresponding transmission mechanism to slide back and forth along the track of the rear workbench 2 or the front workbench 3, thereby driving the aramid fiber layer pretreatment device 19 and the seaweed fiber layer pretreatment device 20 to slide correspondingly, and at this time, the rightmost side of the aramid fiber layer pretreatment device 19 or the seaweed fiber layer pretreatment device 20 arranged on the left side moves closely with the leftmost side of the seaweed fiber layer pretreatment device 20 or the aramid fiber layer pretreatment device 19 arranged on the right side, and the distance ratio of each reciprocating movement of the aramid fiber layer pretreatment device 19 and the seaweed fiber layer pretreatment device 20 is equal to the required mixing ratio of aramid fibers and seaweed fibers, in the movement process, the aramid fibers are laid flat on the first weighing platform 9, and the seaweed fibers are laid flat on the second weighing platform 10, in the process of one-time movement of the aramid fiber layer pretreatment device 19, a layer of aramid fibers is formed on the first weighing platform 9, and the left spray pipe 26 and the right spray pipe 27 of the aramid fiber layer pretreatment device 19 spray the antistatic agent mixture in the liquid storage tank 29 on the formed layer of aramid fibers, in the process of one-time movement of the seaweed fiber layer pretreatment device 20, a layer of seaweed fibers is formed on the second weighing platform 10, and the left spray pipe 26 and the right spray pipe 27 of the seaweed fiber layer pretreatment device 20 spray the cohesion enhancer oil in the liquid storage tank 29 on the formed layer of seaweed fibers,The output layer tower 23 of the polyethylene terephthalate layer pretreatment device 19 and the seaweed layer pretreatment device 20 is driven to rise by the corresponding transmission structure, and when the polyethylene terephthalate fiber layer reaches the required weight, the polyethylene terephthalate layer pretreatment device 19 and the initial grabbing machine of the polyethylene terephthalate fiber stop working at the same time, and when the seaweed fiber layer reaches the required weight, the seaweed layer pretreatment device 20 and the initial grabbing machine of the seaweed fiber stop working at the same time, so as to finally form the pretreated polyethylene terephthalate fiber layer and the pretreated seaweed fiber layer which have the same height and are close to each other.

[0030] After the layering is completed, the polyethylene terephthalate layer pretreatment device 19 and the seaweed layer pretreatment device 20 are moved to the front workbench 3 or the rear workbench 2 along the pretreatment workbench 51, and at the same time, the grabbing device 11 is moved to the rear workbench 2 or the front workbench 3 along the grabbing workbench 4, so as to complete the transfer of the layering pretreatment device and the grabbing device 11. After the transfer of the grabbing device 11, the pretreated polyethylene terephthalate fiber layer and the pretreated seaweed fiber layer formed at the workbench 1 are stacked for 24 hours, and then the grabbing device 11 starts to perform the grabbing work. At this time, the grabbing tower 14 of the grabbing device 11 is driven to descend by the corresponding transmission structure until the pressed strip is in close contact with the lower pretreated polyethylene terephthalate fiber layer or the pretreated seaweed fiber layer. The fibers on the upper layer of the pressed pretreated polyethylene terephthalate fiber layer or the pretreated seaweed fiber layer extend into the grabbing tower 14 through the fiber extension space. The extended fibers are grabbed by the grabbing cloth 17 of the rotating first grabbing beater 15 and the second grabbing beater 16. The negative pressure generated by the negative pressure device in the front machine table enters the grabbing tower 14 through the fiber output pipe 18. Under the action of the negative pressure, the grabbed mixed fibers of polyethylene terephthalate and seaweed are transported to the front machine table through the fiber output pipe 18. In the process of outputting the polyethylene terephthalate fiber or the seaweed fiber, the grabbing sliding roller 13 is driven to reciprocate along the length direction of the close pretreated polyethylene terephthalate fiber layer or the pretreated seaweed fiber layer by the corresponding transmission mechanism, thereby driving the grabbing device 11 to reciprocate correspondingly. In the process of reciprocation, the grabbing device 11 completes the grabbing of the polyethylene terephthalate fiber and the seaweed fiber along the length direction of the pretreated polyethylene terephthalate fiber layer or the pretreated seaweed fiber layer. The grabbing tower 14 of the grabbing device 11 is driven to descend by the corresponding transmission structure, and the grabbing of the polyethylene terephthalate fiber and the seaweed fiber along the thickness direction of the pretreated polyethylene terephthalate fiber layer or the pretreated seaweed fiber layer is completed, until the fibers of the pretreated polyethylene terephthalate fiber layer or the pretreated seaweed fiber layer are completely grabbed.

[0031] (2) Mixed into sliver: the mixed fibers grabbed by the pretreatment grabber are mixed and opened by automatic blending, in the automatic blending, the mixed fibers conveyed are sent into the cotton box, and after a certain height is formed in the cotton box, the mixed fibers are output through the swing hopper, so as to form a mixed fiber layer with a certain height, the mixed fiber layer is grabbed along the thickness direction by the angle nail curtain, and the mixing of the two fibers is realized in the grabbing process, the grabbed mixed fibers are uniformly arranged by the presser bar and the even roller in turn, and the mixed fibers after the arrangement are freely opened by the first beater and the second beater, and the impurities in the fibers are removed in the opening process, the opened mixed fibers flow into the carding machine provided with the feeding cotton box through the corresponding pipeline, and the input mixed fibers are uniformly conveyed to the carding machine after the arrangement of the feeding cotton box, in the carding machine, the mixed fibers are made into sliver through holding opening, free carding, web condensation and convergence.

[0032] (3) Blended into yarn: the mixed fiber sliver prepared in step (2) is arranged into mixed slubbing with reduced weight unevenness and improved fiber straightness after two drawing arrangements, in the first drawing arrangement, six mixed fiber slivers are fed together, and large gauge and large back zone draft are adopted to prepare mixed semi-slubbing with mainly improved fiber straightness and auxiliary improved weight unevenness, in the second drawing arrangement, six mixed semi-slubbing are fed together, and small gauge and small back zone draft are adopted to prepare mixed slubbing with mainly improved weight unevenness and auxiliary improved fiber straightness; the mixed slubbing is prepared into blended roving with a certain internal friction field, in the roving, heavy weight, small draft is adopted to prepare blended roving with large twist coefficient and weight of more than 9 g / 10 m; the blended roving is prepared into the required flame-retardant blended yarn through spinning, in the spinning, small back zone draft and large front zone draft are adopted to prepare the required flame-retardant blended yarn.

[0033] Embodiment

[0034] Taking the production of 18.5 tex and 70% aramid / 30% seaweed fiber flame-retardant blended yarn as an example, the aramid fiber and seaweed fiber are pretreated and mixed by the pretreatment grabber of the application respectively.

[0035] (1) Raw material selection:

[0036]

[0037] (2) Process flow:

[0038] The antistatic agent mixed solution is mixed in a proportion of non-ionic antistatic agent: deionized water = 1:100, and the cohesion enhancer oil agent is mixed in a proportion of anionic spinning oil agent: deionized water = 1:50.

[0039] Manual mixing:

[0040] Polyethylene fiber and seaweed fiber simple mixing → JJKS-1000 opener → A006B cotton mixer → FA201B carding machine → FA311 drawing frame (two) → FA402B roving machine → FA506 spinning machine → No. 21C automatic winder.

[0041] The present application:

[0042] Polyethylene fiber: FA002A disc type automatic bale plucker

[0043] Seaweed fiber: FA002A disc type automatic bale plucker

[0044] Pre-treatment bale plucker → A006B cotton mixer → FA201B carding machine → FA311 drawing frame (two) → FA402B roving machine → FA506 spinning machine → No. 21C automatic winder

[0045] (3) Process parameter design

[0046] Disc type automatic bale plucker:

[0047]

[0048] Pre-treatment bale plucker:

[0049]

[0050] Cotton mixer:

[0051]

[0052] Carding:

[0053]

[0054] Drawing:

[0055]

[0056] Roving:

[0057]

[0058] Spinning:

[0059]

[0060] Winding:

[0061]

[0062] (4) Quality of tube yarn:

[0063]

[0064] It is obvious from the test results that the use of the pretreatment picker of the present application for mixing aramid fibers and seaweed fibers not only significantly improves the mixing efficiency, but also increases the production speed of the subsequent processes including blending, carding, drawing, roving and spinning, while ensuring yarn quality comparable to that of traditional manual mixing.

[0065] The above detailed description of the embodiments shown in the drawings explains the structure, features and effects of the present application. The above description is only the preferred embodiments of the present application, but the present application is not limited to the embodiments shown in the drawings. Any changes or modifications made in accordance with the concept of the present application, or equivalent embodiments with equivalent changes, are still within the scope of the present application.

Claims

1. A method for producing flame-retardant blended yarn, characterized in that, Includes the following steps: (1) Fiber pretreatment: Methyl cellulose fibers and seaweed fibers with the same average length and linear density are initially grasped and opened by a disc-type initial grasping machine, and then conveyed together to a pretreatment grasping machine. The pretreatment grasping machine includes a ring-shaped worktable. A grasping device and a layup pretreatment device are set in the slide of the worktable. The grasping device and the layup pretreatment device are respectively set on different sides of the worktable. The layup pretreatment device includes a methyl cellulose layup pretreatment device and a seaweed layup pretreatment device with the same structure. The methyl cellulose fibers and seaweed fibers grasped by the initial grasping machine are respectively conveyed to the methyl cellulose layup pretreatment device and the seaweed layup pretreatment device through pipelines. Under the action of the methyl cellulose layup pretreatment device and the seaweed layup pretreatment device moving back and forth along the worktable, the methyl cellulose fibers and seaweed fibers are laid up on the weighing device below. During the layup process, the antistatic spray on the methyl cellulose layup pretreatment device is sprayed with antistatic agent. The spraying device sprays a mixture of antistatic agents onto the methylene fiber layer by layer, while the oil spraying device on the seaweed layup pretreatment device sprays a cohesion-enhancing oil onto the seaweed fiber layer by layer. The weighing device below ensures the required weight of both fibers at the desired mixing ratio, thus forming a pretreated methylene fiber layer and a seaweed fiber layer with consistent height and close contact with each other. After being stacked for 24 hours, the cotton-grabbing device rotates along one side of the worktable to the side where the methylene fiber and seaweed fiber layup is completed. Under the action of the cotton-grabbing device moving back and forth along the worktable, the methylene fiber and seaweed fiber are simultaneously grabbed according to the mixing ratio. At the same time, the layup pretreatment device rotates along the other side of the worktable to the side where the methylene fiber and seaweed fiber are grabbed. Under the action of the methylene fiber layup pretreatment device and the seaweed layup pretreatment device moving back and forth along the worktable, the pretreatment and layup of the methylene fiber and seaweed fiber on that side are completed. (2) Mixing into strips: The nylon fiber and seaweed fiber grabbed by the cotton grabbing device are automatically mixed and continuously fed into the carding machine equipped with a feeding cotton box. The mixed fiber is evenly transported to the carding machine after being sorted by the feeding cotton box. In the carding machine, the mixed fiber is grasped, loosened, freely combed, condensed into a web, and gathered into strips to obtain mixed fiber strips. (3) Blended yarn: After two drawing and finishing processes, the blended fiber sliver is made into a blended sliver with reduced weight unevenness and increased fiber straightness. The blended sliver is then roving to make a blended roving with a certain internal friction field. The blended roving is then spun into the desired flame-retardant blended yarn. The pre-treatment device includes a methyl methacrylate (MMA) pre-treatment device and a seaweed pre-treatment device with identical structures. Both the MMA pre-treatment device and the seaweed pre-treatment device include a pre-treatment connecting chamber and an output pre-treatment tower. Pre-treatment sliding rollers are respectively provided at the four corners of the lower side of the pre-treatment connecting chamber. A first pipeline inlet is opened on the upper side of the pre-treatment connecting chamber. A liquid storage tank is provided above the upper side of the pre-treatment connecting chamber. An output pre-treatment tower is provided on the side of the pre-treatment connecting chamber facing outward from the workbench. The inward side of the output pre-treatment tower is vertically connected to the side of the pre-treatment connecting chamber facing outward from the workbench. The output pre-treatment tower is driven by a corresponding transmission structure to rise or fall along the height direction of the side of the pre-treatment connecting chamber facing outward from the workbench. A second pipeline connection is opened on the inward side of the output pre-treatment tower. A fiber input pipe is provided at the second pipeline connection. The height and length of the outward-facing side of the output layup tower are both smaller than the height and length of the inward-facing side. A sealing plate is provided on the downward-facing side of the output layup tower. The sealing plate includes a left sealing plate and a right sealing plate with identical structures. Both the left and right sealing plates are right-angled triangles. The hypotenuse of the left sealing plate is fixedly connected to the left side of the downward-facing side of the output layup tower, and the hypotenuse of the right sealing plate is fixedly connected to the right side of the downward-facing side of the output layup tower. A rectangular open layup opening is formed on the downward-facing side of the output layup tower. An output roller pair is provided within the layup opening on the lower side of the output layup tower. The output roller pair delivers the output layup... The lower side of the tower is fully covered. The output roller pair includes a first output roller and a second output roller with identical structures. The first output roller and the second output roller are rotatably connected to the layup port. The first output roller and the second output roller are driven by corresponding transmission mechanisms to rotate at the same speed but in different directions. The first output roller on the left rotates clockwise and the first output roller on the right rotates counterclockwise. A left spray pipe is provided below the left sealing plate and a right spray pipe is provided below the right sealing plate. The left spray pipe and the right spray pipe are connected to the liquid storage tank through liquid delivery pipes. The outward-facing side of the output layup tower is interconnected with the corresponding negative pressure system through a filter screen.

2. The method for producing flame-retardant blended yarn according to claim 1, characterized in that, The workbench includes a front workbench and a rear workbench, both with identical structures. Both are hollow cuboids and arranged in parallel front-to-back configurations. The workbench and rear workbench are placed on the ground. Sliding rails are provided along the length of the upper surfaces of both workbench and rear workbench. These sliding rails include a first rail and a second rail arranged in parallel. The upper surfaces of the front workbench and the rear workbench are positioned between the first rail and the second rail. The upper part has a pipe connection seam. The left sides of the front worktable and the rear worktable are naturally connected by a cotton-grabbing worktable. The cotton-grabbing worktable is a hollow, left-convex arc-shaped structure. A cotton-grabbing pipe connection port is opened on the outer side of the cotton-grabbing worktable. A sliding rail is arranged along the arc direction of the upper side of the cotton-grabbing worktable. The two ends of the sliding rail of the cotton-grabbing worktable are naturally connected to the sliding rails of the front worktable and the rear worktable, respectively. The upper side of the sliding rail between the first rail and the second rail of the cotton-grabbing worktable is... The upper part has a pipe connection seam. The two ends of the pipe connection seam of the cotton-grabbing workbench are naturally connected to the pipe connection seams of the front workbench and the rear workbench, respectively. The right sides of the front workbench and the rear workbench are naturally connected via a pretreatment workbench. The pretreatment workbench is a hollow, right-convex arc-shaped structure. A sliding rail is provided along the arc direction of the upper side of the pretreatment workbench. The two ends of the sliding rail of the pretreatment workbench are naturally connected to the sliding rails of the front workbench and the rear workbench, respectively. A pipe connection seam is opened on the upper side of the sliding track between the first track and the second track of the pretreatment workbench. The two ends of the pipe connection seam of the pretreatment workbench are naturally connected to the pipe connection seams of the front workbench and the rear workbench, respectively. The sliding tracks of the front workbench, the cotton-grabbing workbench, the rear workbench, and the pretreatment workbench are interconnected to form a complete workbench track. The pipe connection seams of the front workbench, the cotton-grabbing workbench, the rear workbench, and the pretreatment workbench are interconnected to form a complete workbench pipe connection seam.

3. The method for producing flame-retardant blended yarn according to claim 2, characterized in that, Weighing devices are respectively installed on the ground facing outwards from the front workbench and the rear workbench. The weighing devices include an identical first weighing platform and a second weighing platform, which are close together.

4. The method for producing flame-retardant blended yarn according to claim 1, characterized in that, The pretreatment sliding roller is connected to the lower side of the pretreatment connecting chamber in a way that allows it to rotate radially and axially simultaneously. The pretreatment sliding roller is driven by a corresponding transmission mechanism to slide along the workbench track.

5. The method for producing flame-retardant blended yarn according to claim 1, characterized in that, A liquid storage tank is provided above the upper side of the pretreatment connecting chamber. An antistatic agent mixture is placed in the liquid storage tank of the methylene layer pretreatment device, and a cohesion enhancing oil is placed in the liquid storage tank of the seaweed layer pretreatment device.

6. The method for producing flame-retardant blended yarn according to claim 1, characterized in that, The fiber input pipe extending from the methylene fiber pretreatment device is rotatably interconnected with the input pipe of the methylene fiber initial cotton grabber, and the fiber input pipe extending from the seaweed pretreatment device is rotatably interconnected with the input pipe of the seaweed fiber initial cotton grabber, while keeping the rotatable connection in a closed state.

7. The method for producing flame-retardant blended yarn according to claim 1, characterized in that, The cotton-grabbing device includes a cotton-grabbing connecting bin and a cotton-grabbing tower. Cotton-grabbing sliding rollers are respectively installed at the four corners of the lower side of the cotton-grabbing connecting bin. A cotton-grabbing tower is installed on the side of the cotton-grabbing connecting bin facing outwards from the worktable. The inward-facing side of the cotton-grabbing tower is vertically connected to the inward-facing side of the cotton-grabbing connecting bin. A third pipe connection port is opened on the inward-facing side of the cotton-grabbing tower, and a fiber output pipe is installed at the third pipe connection port. A cotton-grabbing beater is installed inside the cotton-grabbing tower, and the cotton-grabbing beater includes a first cotton-grabbing beater with the same structure. The first and second cotton-grabbing beaters are spaced at a certain distance from each other. The first and second cotton-grabbing beaters are rotatably connected to the inner side of the cotton-grabbing tower. The first and second cotton-grabbing beaters are driven by corresponding transmission mechanisms to rotate at the same speed but in different directions. The first cotton-grabbing beater on the left rotates counterclockwise, and the second cotton-grabbing beater on the right rotates clockwise. Fiber-grabbing needle cloth is provided along the outer circumference of the first and second cotton-grabbing beaters.

8. The method for producing flame-retardant blended yarn according to claim 7, characterized in that, The cotton-grabbing tower has a hollow structure. The outward-facing side of the cotton-grabbing tower is rectangular and vertical, while the downward-facing side is a horizontal and open rectangle. Pressing strips are evenly spaced on the downward-facing side of the cotton-grabbing tower. The pressing strips are convex arc-shaped structures, and there is a certain distance between adjacent pressing strips. The inward-facing side of the cotton-grabbing tower is a vertical rectangle, and the height of the outward-facing side of the cotton-grabbing tower is less than the height of the inward-facing side.

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