CN115262081B

CN115262081B - Production process and production line of high-strength continuous glass fiber fireproof insulation board

Info

Publication number: CN115262081B
Application number: CN202210876308.7A
Authority: CN
Inventors: 吴龙; 钱长城; 郑伟峰; 曹瑶瑶; 张琳; 杨雪
Original assignee: Taishan Fiberglass Inc
Current assignee: Mount Taishan Fiberglass Taiyuan Co ltd; Taishan Fiberglass Inc
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-05-26
Anticipated expiration: 2042-07-25
Also published as: CN115262081B8; CN115262081A

Abstract

The invention provides a production process and a production line of a high-strength continuous glass fiber fireproof insulation board. According to the invention, the production process is researched and modified, so that the production efficiency is improved, the overall uniformity of the product is ensured, and the continuous and efficient production of the heat-insulating plate with the advantages of fire resistance, water resistance, high tensile strength and good heat-insulating effect is realized, and particularly, the uniformity and controllability of the glue content of the product can be ensured.

Description

Production process and production line of high-strength continuous glass fiber fireproof insulation board

Technical Field

The invention relates to the technical field of fireproof insulation board production, in particular to a production process and a production line of a high-strength continuous glass fiber fireproof insulation board.

Background

In the building industry, the external wall heat insulation material is used for insulating the building wall body and is also an important factor influencing the energy conservation of the building. At present, when the heat-insulating board is prepared, various curing agents and other auxiliary agents are required to be added to achieve the bonding effect and improve the product performance, but the added auxiliary agents are combustible, so that the fireproof performance of the product is reduced. The heat conductivity coefficient and the fireproof performance of the heat-insulating board are concerned in the existing standard, however, the uniformity degree of glue contained in the product is not paid attention to, and the problem that the outer part of the glass fiber is saturated in glue dipping and the inner part is not fully immersed is easily caused because the resin immersing process takes longer time; the traditional gum dipping process consumes long time; products with insufficient internal gum dipping have poor bonding effect, and under extreme environments such as strong wind or earthquake, the structure of the products can be damaged to cause fracture.

In addition, in order to pursue high volume weight, the prior art provides various solutions, and the disclosure patent of a novel insulation board and a production process thereof (publication number: CN 11)2142367A) provides a production line of an insulation board only comprising inorganic glass fibers and water-soluble adhesives, wherein the insulation board product comprises 100 parts of glass fibers and 2-15 parts of phenolic resin, and can realize the heat conductivity coefficient as low as 0.028-0.035W/(mK) and the volume weight of 150-380 kg/m ³ The process comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, extruding glue and curing and forming. The drawing strength of the product is greatly improved through microwave curing. However, in the implementation process of the method, a large amount of adhesive is needed, the ratio of the amount of the sprayed water-soluble resin to the added amount of the glass fiber in unit time in the spraying process is 15-20%, and the amount of the phenolic resin corresponding to 100g of the glass fiber in the obtained product is 4-6 g; the process needs to evaporate a large amount of water, and has high energy consumption; and the glue extrusion process is needed, so that not only is waste materials needed, but also time and energy are consumed, the production cost is high, and the economic benefit is poor.

Disclosure of Invention

Aiming at the problems of poor glue content uniformity, high production cost and low efficiency of the insulation board in the prior art, the invention provides a production line and a production process of different high-strength continuous glass fiber fireproof insulation boards, reduces the use of resin glue, improves the production efficiency, reduces the production cost, and simultaneously obtains products with better heat preservation and protection performances. As a first aspect of the present invention, there is provided a process for producing a high-strength continuous glass fiber fireproof insulation board, wherein continuous glass fiber and water-soluble resin glue are used as raw materials, and the product is obtained by feeding, fluffing treatment, finishing, net-discharging, sizing, needle punching to form a felt, curing and sizing in sequence; the production process comprises the following steps:

step 1, feeding, namely providing continuous glass fiber raw materials by using an automatic feeding system;

step 2, fluffing, namely performing coarse opening on the continuous glass fibers, and performing fine opening through a cotton mixing process;

step 3, finishing and discharging the web, and finishing and discharging the web by adopting a carding machine to obtain a fiber web;

step 4, sizing and lapping, namely lapping the fiber web obtained in the step 3 and spraying water-soluble resin glue at the same time to obtain a fiber web layer;

step 5, needling to form a felt, and performing needling treatment on the fiber web layer obtained in the step 4 to obtain a felt embryo felt containing the glue needling;

step 6, solidifying, namely heating, solidifying and forming the needled felt embryo felt containing the glue, which is obtained in the step 5;

and 7, sizing, namely transversely and longitudinally cutting the dried and cured product to produce the fireproof insulation board with specific size specification.

Preferably, the flow rate of the spraying water-soluble resin adhesive in the step 4 is 20-60L/h.

Further, in the step 4, the weight of the spraying water-soluble resin glue solution is 75kg-150kg per ton of glass fiber raw material.

Preferably, the needling treatment in the step 5 comprises pre-needling and barb, the fiber web layer obtained in the step 4 is needled from top to bottom through a needle machine, and then the fiber web layer is needled reversely from bottom to top through the needle machine, so as to form the needled felt embryo felt containing glue.

Further, in the step 5, the compression ratio of the pre-needling is 1% -29%, and the compression ratio of the barbs is 16% -33%.

Further, the fiber web layer obtained in the step 4 is compressed before the needling treatment in the step 5, and the compression ratio is 0.1-0.3% of the original thickness.

Preferably, in the step 6, a hot air circulation curing furnace is adopted for heating, curing and forming or microwave curing equipment is adopted for forming.

In the embodiment provided by the invention, the heat conductivity coefficient of the obtained high-strength continuous glass fiber fireproof heat insulation board product is 0.025-0.035W/(mK); the glue content of the obtained high-strength continuous glass fiber fireproof insulation board product is 3% -10%, preferably 4%.

As a second aspect of the present invention, there is provided a production line of a high-strength continuous glass fiber fireproof insulation board for completing a production process of the high-strength continuous glass fiber fireproof insulation board, the production line comprising a feeding device, a unpacking device, an opening device, a carding device, a spraying device, a lapping device, a pre-needling device, a barb device, a drying and curing device and a cutting device which are sequentially connected; wherein, spray equipment sets up on the lapping equipment.

Preferably, the lapping device comprises a net inlet curtain, a net outlet curtain, a lapping trolley and a bottom curtain from top to bottom in sequence; the lapping method comprises ring curtain lapping or additive lapping;

the spraying equipment comprises a spraying pipe, a spray head on the spraying pipe and an air spraying pipe which is arranged in parallel with the spraying pipe, wherein the spraying pipe and the air spraying pipe are arranged below the lapping trolley, the spray head is horizontally arranged, and water-soluble resin glue is sprayed on the fiber web;

the fiber net output by the carding process reaches a net outlet curtain through a net inlet curtain, the net outlet curtain conveys the fiber net to a net-laying trolley, and the fiber net with specific moisture content after spraying is laid on a bottom curtain by the reciprocating motion of the net-laying trolley to form a fiber net layer.

Preferably, the spraying equipment further comprises a storage tank, a multistage centrifugal pump, a diversion control device and a flow monitoring device which are connected through pipelines, wherein the water-soluble resin glue in the storage tank is conveyed to the diversion control device through the multistage centrifugal pump, and the diversion control device is used for diverting and conveying the water-soluble resin glue to each spray head of the spraying pipe through the pipelines; and a flow monitoring device is arranged at each shunt outlet of the shunt control device.

Compared with the prior art, the invention has the beneficial effects that:

1. the traditional glass fiber reinforced composite material is generally produced by adopting a process of needling and then spraying or dipping, because the needled embryo felt has larger volume weight, is compact, has thicker thickness, is not easy to be soaked by glue solution and is not easy to control uniformity. Therefore, the gum dipping time is longer, or a large amount of resin gum solution is required to be applied in the spraying process to improve the dipping effect, but the dipping uniformity of the gum solution can not be ensured; and a large amount of glue-extruding technology is needed to be assisted in the subsequent glue-extruding process, and a large amount of water is introduced into the high-content glue solution, so that the subsequent curing process is long in time and high in energy consumption. The invention is to glue the single-layer fiber net by spraying technology, and then to needle. The method has the advantages that the glue content of each layer of fiber net can be accurately controlled, so that the uniformity of the whole glue content of the fireproof insulation board is ensured.

2. According to the invention, the pre-needling and the needling are carried out after the glue spraying, so that a passage in the vertical direction is formed in the fiber net layer, and in the curing process, heat is transmitted from the surface to the inside, the temperature difference between different layers is reduced, the curing time is shortened, and the production efficiency is improved.

3. The heat-insulating board product provided by the invention has the heat conductivity coefficient of 0.025-0.035W/(mK), and the heat-insulating effect is superior to that of rock wool and the heat-insulating board made of the existing glass fiber composite material.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

FIG. 1 is a flow chart of a production process of a high-strength continuous glass fiber fireproof insulation board;

FIG. 2 is a schematic diagram of a production line structure of a high-strength continuous glass fiber fireproof insulation board according to the invention;

FIG. 3 is a schematic diagram of an unpacking process device according to the present invention;

FIG. 4 is a schematic view of a carding process unit according to the present invention;

FIG. 5 is a schematic view of the structure of a feed roll in a carding process unit according to the present invention;

FIG. 6 is a schematic view of a spray process apparatus according to the present invention;

FIG. 7 is a schematic diagram of a lapping process apparatus according to the present invention;

fig. 8 is a schematic view of a pre-needling process apparatus and barb process apparatus in accordance with the present invention.

Reference numerals illustrate: 101 raw material placing racks, 102 storage bins, 103 raw material conveying devices, 104 weighing devices, 201 input curtains, 202 small flat curtains, 203 inclined curtains, 204 unpacking beater bars, 601 feeding rollers, 602 chest cylinders, 603 transfer rollers, 604 main cylinders, 605 working rollers, 606 stripping rollers, 607 doffers, 608 disorder rollers, 609 stripping rollers, 701 storage tanks, 702 multistage centrifugal pumps, 703 spray pipes, 704 spray heads, 705 air pipes, 706 shunt control devices, 707 flow monitoring devices, 801 net feeding curtains, 802 net discharging curtains, 803 net laying trolleys and 804 bottom curtains; 6011 feed roller, 6012 pressure spring, 6013 spindle head guide block, 6014 carding machine frame.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As textile sector there are various special constructions, such as cylinders, which are the main elements of the carding machine, the function of which is to strip and bring the initially carded fibres of the licker-in into the working area of the cylinder cover for further fine carding, straightening and uniform mixing, and to transfer the fibres to the doffer.

Doffer, on a carding machine, for stripping fibers from a cylinder.

The cluttering roller is one with card clothing and has cluttering effect. Most fibers are in a state of straightened and parallel single fibers due to carding action of each level of carding units of the non-woven carding machine, so that the difference of longitudinal and transverse properties of the fiber web is large, and most non-woven materials require that the fibers are randomly arranged in the fiber web to form a disordered state, and the disordered rollers can enable the fibers to trend to a disordered state under the action of air flow.

Example 1: production line of high-strength continuous glass fiber fireproof insulation board

As shown in fig. 2, the automatic cotton carding machine comprises a feeding device 1, a bag opening device 2, a coarse opening device 3, a large-bin cotton mixing device 4, a fine opening device 5, a carding device 6, a spraying device 7, a lapping device 8, a pre-needling device 9, a barb device 10, a drying and curing device 11 and a cutting device 12 which are sequentially connected, and respectively realizes the procedures of automatic feeding, bag opening, coarse opening, large-bin cotton mixing, fine opening, carding, spraying, lapping, pre-needling, barb, drying and curing and cutting.

As shown in fig. 2, the feeding device 1 realizes an automatic feeding function of the whole glass fiber raw material. As shown in fig. 2, the process device comprises a raw material placing frame 101, a storage bin 102, a raw material conveying device 103 and a weighing device 104 which are connected in sequence. The whole package glass fiber raw materials is placed on raw materials rack 101 through automatic commodity circulation, pours the raw materials into storage silo 102 through the lift and the upset function of raw materials rack 101, and raw materials that raw materials conveyor 103 will export from the storage silo lower extreme export is carried weighing device 104, and weighing device 104 can accurately weigh the raw materials to carry the bale opener with the raw materials after weighing.

As shown in fig. 2, the raw material placing frame 101, the storage bin 102 and the raw material conveying device 103 are respectively two sets, and are arranged perpendicular to the weighing device 104, so as to provide raw materials to the weighing device 104. When the yield is larger, the two sets of feeding devices are more convenient, or when one set of feeding devices fails, the other set of feeding devices can also continue to feed.

The weighing device 104 is specifically a weighing conveying device or a weighing conveying belt, and weighs the conveyed glass fibers, and then feeds the glass fibers into a bale opener in the next process, so that the feeding accuracy is ensured.

Further, the ton package that is equipped with glass fiber raw materials, and four angles of one of them side and four angles of bottom surface are designed with solid fixed ring, and raw materials rack 101 designs has the hasp, corresponds with ton package solid fixed ring, locks ton package on the raw materials rack. The raw material placing frame is provided with a lifting mechanism and a turnover mechanism, the lifting mechanism adopts a hydraulic system to lift raw materials to the upper end of the storage bin 102, and the turnover mechanism adopts the hydraulic system to turn over the raw material placing frame, so that the raw materials are poured into the storage bin.

Further, the storage bin 102 is of an inverted funnel structure, a strip-shaped discharge hole is formed in the lower end of the storage bin, a beater is arranged at the position of the discharge hole, the diameter of the beater is 400-500 mm, and the beater adopts nailing strips to uniformly stir raw materials from the storage bin to a raw material conveying device 103 below.

Further, the raw material conveying device 103 comprises a carbon steel frame and a conveying curtain. The conveying curtain is a PVC rubber curtain, the speed reducer is controlled by the frequency converter to drive, the speed range is 2.5 meters-20 meters/min, and raw materials are conveyed to the weighing device 104.

Further, the weighing device 104 includes a stationary frame, a conveyor curtain, a precision electronic scale, and a display screen. Wherein the conveying curtain is a PVC rubber curtain, and the speed reducer is controlled by the frequency converter to drive. The number of the precise electronic scales is 4, the precise electronic scales are arranged below the conveying curtain, and the display screen can display the weight in real time. When the set weight is reached, the weighing device 104 conveys the raw materials to the next process, and the continuous feeding is avoided to cause the blockage of the next process.

According to the invention, the bale breaking equipment and the opening equipment are used for opening the glass fibers in various grades, so that the glass fibers can be uniformly paved on the cotton mixing curtain under program control.

As shown in fig. 3, the unpacking device includes an input curtain 201, a small flat curtain 202, an inclined curtain 203, and an unpacking beater 204. The automatic feeding device for the previous process is characterized in that materials conveyed by a weighing conveyor belt freely fall onto an input curtain 201 to be stored, raw materials are conveyed onto a small flat curtain 202 at the lower end of an inclined curtain 203 through transmission, the inclined curtain 203 conveys the raw materials of the lower end small flat curtain 202 obliquely upwards, a bale opening beater 204 rotates to take materials, and the grabbed raw materials are driven into the next process.

Further, the inclined curtain 203 is a nailing strip type, and an antistatic curtain is adopted as base cloth, so that the problem of raw material static in the transportation process of the inclined curtain is solved.

Further, the diameter of the unpacking beater 204 is 400-500 mm, the beater adopts nailing strips, and raw materials are more evenly extracted.

And the coarse opening equipment is used for opening the glass fibers conveyed by the opening equipment in an opener and conveying the glass fibers to the next working procedure through a cotton conveying fan. The process equipment comprises a frame, an input curtain, a feeding roller, an opening cylinder, a cotton feeding fan, a bridge and a strong magnet, and adopts a structure commonly used in the field.

Specifically, the frame is formed by laser cutting and welding of the frame, the wallboard is an iron plate with the thickness of 5-10 mm, and the sheet metal part with the thickness of 2-5mm is fed; the input curtain is a PVC rubber curtain; the feeding roller is fed by double licker-in, and the diameter of the roller is 70-90 mm; the diameter of the opening cylinder is 400mm-500mm, the clothing is wound on the opening cylinder, and the rotating speed is 800-1000 revolutions per minute; the cotton feeding fan is independently controlled by a motor in a variable frequency mode, and the air quantity can be automatically adjusted according to the output. And conveying the raw materials subjected to the rough opening treatment to large-bin cotton mixing equipment in the next step through a cotton conveying fan and a pipeline.

And the large-bin cotton mixing equipment is used for fully mixing and storing the coarsely opened glass fibers in the cotton mixing large bin so as to achieve the effect of continuous production. The cotton mixing large bin is common equipment in the field and comprises a cotton box, a conveying curtain, an inclined nail curtain, a beater, a condenser and a photoelectric control system.

Specifically, the parameters adopted in the invention are that the conveying curtain is a PVC curtain; the inclined nail curtain adopts PVC leather curtain as base cloth, the diameter of a curtain guiding roller is 150mm, and the frequency conversion is controlled; the diameter of the beater is 400-500 mm, the diameter of the beater is 4mm by adopting nailing strips, each nailing strip is evenly distributed at 50mm intervals, 3 rows of nails are evenly distributed, the beater is more evenly opened, the air quantity is effectively controlled, and flying and air flow are reduced; the photoelectric control system can effectively control cotton amount and material level filling level in the cotton box, and improves operation efficiency and saves energy.

Further, a set of condenser is arranged above the cotton box of the large-bin cotton blend, dust collection interfaces are arranged on the condenser and the punching part, and the condenser and the punching part are connected to a central dust collection unit.

The tail end of the large bin is directly connected with the fine opening equipment.

And the fine opening equipment is used for further opening the glass fibers sent by the large-bin cotton blend in an opening machine and conveying the glass fibers to the next working procedure through a cotton conveying fan. Raw materials of the fine opening device are conveyed to a vibrating cotton box through a cotton conveying fan and a pipeline and conveyed to a carding machine through a belt scale.

The carding equipment fully and uniformly mixes the glass fibers subjected to opening treatment on a carding machine, and outputs parallel or disordered fibers after doffer and coagulation disorder to be conveyed to a next lapping process. As shown in fig. 4, the carding apparatus includes a feed roller 601, a chest cylinder 602, a transfer roller 603, a main cylinder 604, a work roller 605, a stripper roller 606, a doffer 607, a document roller 608, and a stripper roller 609. In order to continuously, uniformly and accurately feed the fiber batting, a high-precision carding and feeding system is adopted, and firstly, fibers which are uniformly, quantitatively, continuously and continuously are conveyed to a chest cylinder for grabbing through a feeding roller 601; the chest cylinder 602 is provided with a pair of working rolls 605 and a dehairing roll 606, and fibers are combed by a carding unit consisting of the chest cylinder 602, the working rolls 605 and the dehairing roll 606, mixed into a transfer roll 603 and then conveyed to a main cylinder 604 by the transfer roll 603. The main cylinder 604 is provided with 5 pairs of working rolls 605 and stripping rolls 606 to form 5 carding points, fibers are carded by carding units consisting of the working rolls 605 and the stripping rolls 606, stripped by 2 groups of upper doffers 607, stripped by the disordered rolls 608 to the stripping rolls 609, and finally conveyed to the next working procedure by an output curtain.

As shown in fig. 5, the feed roller 601 is composed of 4

feed rollers

6011, 2 each. The lower 2 feeding rollers are fixed, the upper 2 feeding rollers are fixed through a pressure spring 6012, and the height of the upper feeding roller can be automatically adjusted up and down according to the thickness of the raw materials; the contact position of the lower end feeding roller and the pressure spring 6012 is fixed to the spindle head guide block 6013, a groove track is arranged on the carding machine frame 6014, a plurality of screw holes are arranged on the groove track, and the position of the upper end feeding roller is adjusted and fixed through a pin shaft penetrating through the screw holes. The upper 2 rollers and the lower 2 rollers are not contacted, the existing clearance is 1mm-5mm, and the adjustable range is 1mm-30mm. The upper roller and the lower roller are connected to a metal detection alarm device, when metal passes through the upper roller and the lower roller, the metal detection alarm device works, the equipment is stopped, the feeding roller is controlled to be reversed, and the metal is prevented from entering the equipment to damage card clothing.

The spraying equipment is designed with a uniform sizing (spraying) device, and is synchronously carried out on the bottom curtain with the lapping machine, and is arranged on a lapping trolley of the lapping machine, and continuous and uniform glue spraying is carried out on the fiber web along with the reciprocating motion of the lapping trolley. As shown in fig. 6, the apparatus includes: a storage tank 701, a multistage centrifugal pump 702, a shower 703, a shower nozzle 704, a gas jet 705, a shunt control device 706, a flow monitoring device 707, and a pipe. Placing water-soluble phenolic resin into a storage tank 701, conveying phenolic resin glue solution to a diversion control device 706 through a multistage centrifugal pump, then diverting the phenolic resin glue solution into conveying pipes of all spray heads, arranging spray head conveying pipes according to the number of the spray heads in a spray pipe 703, installing spray heads 704 on the spray pipe 703, horizontally arranging the spray heads 704, and spraying the water-soluble phenolic resin glue solution on a fiber web; the accuracy and uniformity of sizing (spraying) in the continuous production process is precisely controlled by adjusting the concentration of the water-soluble phenolic resin glue solution, setting the pressure and flow of the multistage centrifugal pump 702, setting the parameters of the diversion control device, selecting the specification of the spray nozzle 704 and the like.

Further, the spray pipe 703 is a stainless steel round pipe, the outer diameter of the pipe is 20-50mm, the thickness is 2-5mm, and the spray pipe can be split into two parts, so that a spray head conveying pipe is conveniently arranged inside the spray pipe. Threaded holes are formed in the length direction of the spray pipe, the hole distance is 20-100mm, and the spray nozzle 704 is convenient to install and detach.

Further, the spraying process design uses a diversion control device 706, the diversion control device can divert phenolic resin glue solution provided in the multistage centrifugal pump into a plurality of pipelines, the diversion quantity of each pipeline can be controlled independently or in a linkage manner, and a flow monitoring device 707 is arranged at each diversion outlet of the diversion control device, so that the monitored flow signals can be fed back in real time. When spraying, the spraying flow of each spraying pipeline is set, the flow monitoring device monitors the spraying flow of each spray head in real time, and when a certain spraying pipeline is monitored to detect that the flow deviates from the set range, a signal is fed back to the diversion control device, and the diversion control device automatically adjusts to reach the set value. As a typical example, a glue solution with a solid content of 75% is selected, 4 spray heads are used, the frequency of a centrifugal pump is 30HZ, the pressure is 3 kg, the flow rate is 40L/h, the adaptability adjustment is carried out according to the solid content of the glue solution and the glue content of a product, and the flow rate range can be 20-60L/h.

Further, the diversion control device is designed with a function of adjusting the pressure of each diversion pipeline, so that the pressures at all the spray heads are consistent, and the consistency of the spraying range is ensured. In the spraying process, the lengths of the conveying pipelines are inconsistent, the pressure of fluid changes along with the change of the conveying lengths, and even if the set flow rates of the pipelines are consistent, the pressure at the spray head is different, so that the spraying range of the spray head can change, and the spraying uniformity is affected. Therefore, the diversion control device is designed with the function of adjusting the pressure of each diversion pipeline, and the conveying pressure of each pipeline of the flow control device is adjusted according to the actual spraying range of the spray head, so that the uniform spraying is ensured.

Further, the gas jet tube 705 is installed together with the spray tube and below the spray tube, and the medium of the gas jet tube is compressed air with the pressure ranging from 0.2 to 0.8MPa. The air spraying pipes are provided with round holes or long grooves at equal intervals, the opening direction is consistent with the spraying direction of the spray heads and is perpendicular to the fiber net, so that the fiber net is prevented from drifting towards the spray pipes due to inertia when the lapping trolley moves towards the spraying direction, and the fiber net is prevented from being bonded with the spray heads or the spray pipes.

And the lapping equipment is used for continuously laying the fiber web sprayed with the water-soluble resin adhesive on the bottom curtain in multiple layers through the reciprocating motion of the lapping trolley. As shown in fig. 7, the process equipment includes a screen inlet 801, a screen outlet 802, a lapping cart 803, and a bottom curtain 804. The lapping method comprises ring curtain lapping or additive lapping. The fiber web output in the carding process reaches a web outlet curtain 802 through a web inlet curtain 801, the web outlet curtain conveys the fiber web to a lapping trolley 803, and the fiber web with a specific moisture content after spraying is lapped on a bottom curtain 804 through the reciprocating motion of the lapping trolley 803 to form a fiber web layer, and the fiber web layer is conveyed to the next process. The shower 703 is located below the lapping trolley 803.

Further, the inlet and

outlet curtains

801 and 802 employ inlet antistatic high strength carbon curtains. The lapping trolley 803 is designed and provided with spraying equipment, sprays the fiber web firstly, and then performs lapping on the bottom curtain. The bottom curtain 804 adopts a split-charging structure and consists of curtain rods and anti-slip leather strips, wherein 5-15 anti-slip leather strips are arranged on each curtain rod.

The laid multi-layer fiber net layer is conveyed to the pre-needling machine by the lapping machine through a feeding machine at the front section of the pre-needling machine.

The pre-needling apparatus and barb apparatus, as shown in fig. 8, pre-needling compresses the web layer and needling from top to bottom through needles, initially reinforcing the web layer strength. The fiber net layer is reversely needled from bottom to top through the needles by the barbs, so that the strength of the net layer is further enhanced, and the needled felt embryo felt containing the glue is formed. The felt output by the pre-needling machine enters the barb machine through the input curtain of the barb machine. The technological equipment of the pre-needling equipment and the barb equipment comprises a front feeding machine, a pre-needling machine and a barb machine.

Further, the pre-needling front section is provided with a feeding machine, the feeding machine consists of an upper feeding curtain and a lower feeding curtain, and the two feeding curtains are provided with a certain angle and are adjustable in angle and are in a horn mouth shape. The inlet distance is large, so that the thick fiber layer coming out of the bottom curtain of the lapping machine smoothly enters. The outlet distance is automatically regulated by two pairs of gear transmission and cylinder pressurization, and is changed along with the change of the thickness of the fiber layer, and the regulating range is 5mm-100mm. In one embodiment, the thickness of the net layer output by the bottom curtain of the lapping machine is about 35-105 cm, the curtain is fed through a bell mouth of a pre-needling machine, the net layer is preliminarily compressed to be 35mm thick and enters the pre-needling machine, the net layer is 25-30mm thick after being needled by the pre-needling machine, and the final thickness of the product reaches 20-25 mm after being further needled and compressed by a barb machine.

The pre-needling compression ratio is 1-29%, and the barb compression ratio is about 16-33%. The compression ratio of each needling procedure can be adjusted according to the thickness of the product.

Further, the upper and lower feeding rollers with cotton guide strips are arranged at the pre-penetration openings, the air cylinders are used for pressurizing, the power of the upper and lower feeding rollers is respectively transmitted by the upper and lower feeding rollers of the feeding roller, and the gaps between the rollers are changed along with the change of products through chain transmission, so that the thick fiber layers can be smoothly fed into the pre-penetration machine after being further pressed.

Furthermore, the input ends of the net supporting plate and the net stripping plate in the pre-needling machine and the barb machine are in chamfer edge folding mode, and an adjustable distance which is large enough is arranged between the upper net plate and the lower net plate so as to adapt to the smooth passing of products with the thickness of 40mm-60 mm.

The felt output by the barb machine is transported to a drying and curing device.

And the drying and curing equipment is used for carrying out felt curing molding on the rubber-containing blank by using a hot air circulation curing furnace. Further, according to the specification parameters and the productivity requirements of the products, parameters such as the effective length of the hot air circulation curing furnace equipment, the production line speed, the number and the power of a hot air circulation system, the power and the flow of each fan and the like can be calculated, so that the technical requirements of the drying curing equipment are determined.

Further, the speed adjusting range of the production line of the equipment is determined to be 0.2m-5m/min, the product width adaptation range is 1000mm-2000mm, the product thickness adaptation range is 10mm-100mm, and the product density adaptation range is 80-200kg/m ³ The curing temperature is 150-250 ℃, and the yield can reach 600-2000 kg/hour.

And the insulation board output by the drying and curing device reaches the fixed-length cutting device through the conveying belt.

And the cutting equipment is used for transversely and longitudinally cutting the dried and solidified product to produce a finished product with a specific size specification. The process equipment comprises slitting, transverse cutting, edge breaking, length measurement and dust collection on the board surface. The slitting adopts a disc alloy cutter, the cutter is controlled to move up and down through an air cylinder, and a bottom cutter roller is designed and installed right below the slitting cutter. During slitting, the fireproof heat-insulating plate passes through between the slitting cutter and the bottom cutter roller, the air cylinder controls the cutter to press down on the fireproof heat-insulating plate, and the product is cut through passive rotation of the cutter. The transverse cutting adopts a disc type alloy flying saw, and the disc type alloy flying saw actively rotates through motor transmission. The guide rail is arranged in the width direction, and the power machine is used for controlling the fly saw to reciprocate in the width direction. And a transverse cutting bed knife groove is designed and arranged right below the cutter, and the flying saw can transversely cut the fireproof insulation board along the groove.

The production line provided by the invention has the advantages that the spraying equipment is arranged on the lapping equipment, so that spraying and lapping processes can be conveniently carried out at the same time. The method has the advantages that the single-layer fiber net can be continuously and uniformly sized, the whole process is controllable, the uniformity and the controllability of the glue content of the product formed by the multi-layer fiber net are ensured, in addition, the requirement of the product on the glue content can be ensured, the glue solution can be saved, the water content in the sized product is lower, and a large amount of energy cost is saved for subsequent drying and curing.

Example 2: production process of high-strength continuous glass fiber fireproof insulation board

The high-strength continuous glass fiber fireproof insulation board provided by the invention is produced by taking continuous glass fibers as raw materials through short cutting and water-soluble resin glue, and comprises the steps of feeding, fluffing treatment, finishing and screening, sizing, felt forming, curing and sizing, and concretely, the production line provided by the embodiment 1 is adopted, and the process flow sequentially comprises automatic feeding, unpacking, coarse opening, large-bin cotton mixing, fine opening, carding, spraying, lapping, pre-needling, barb forming, drying, curing and cutting.

As a typical example, alkali-free glass fibers are used as the continuous glass fibers in the raw materials, and one or more of alkali-free glass fibers, medium alkali glass fibers, TCR glass fibers, high modulus glass fibers and the like can be used in combination, and are all commercially available from Taishan glass fiber Inc. The short cut length is 30-100mm, and the fiber diameter is 6-17 μm.

The water-soluble resin glue used as a raw material is water-soluble phenolic resin with the solid content of 35-70 percent;

the prepared high-strength continuous glass fiber fireproof insulation board has the glue content ranging from 3% to 10%, preferably 5%, when the glue content is low, the drawing strength of the finished product is low, and when the glue content is too high, the flame retardant property of the product is poor; the weight of the water-soluble resin glue solution added to each ton of glass fiber raw material is 75kg-150kg.

Specifically, in the automatic feeding process, a glass fiber raw material ton bag is placed on a raw material placing rack of an automatic feeding system, and automatic feeding of raw materials is realized through the automatic feeding system; in the unpacking process, unpacking the glass fibers of various grades, and uniformly spreading the glass fibers on a cotton mixing curtain according to program control; in the rough opening process, the glass fiber conveyed by the opening bag is further opened and conveyed to the next process through a cotton conveying fan; in the large-bin cotton mixing process, fully mixing and storing the coarse opened glass fibers to achieve the effect of continuous production; in the fine opening process, the glass fibers conveyed in the previous process are further opened and conveyed to the next process through a cotton conveying fan; in the carding process, fully and uniformly mixing the glass fibers subjected to opening treatment, and outputting parallel or disordered fibers after doffer and coagulation disorder to the next process; in the spraying procedure, a spraying device is designed and installed on a lapping trolley of a lapping machine, water-soluble resin glue is sprayed on the glass fiber net, and the flow range in the spraying process can be 20-60L/h. In the lapping process, the fiber web sprayed with the water-soluble resin glue is continuously laid on the bottom curtain in multiple layers through the reciprocating motion of a lapping trolley; in the pre-needling process, the fiber net layer is compressed and needled from top to bottom through a needling needle, so that the strength of the fiber net layer is primarily enhanced; in the barb process, the fiber net layer is reversely needled from bottom to top through a needling needle, so that the strength of the net layer is further enhanced, and a needled felt embryo felt containing glue is formed; in the drying and curing process, a hot air circulation curing furnace is used for curing and forming, the curing temperature is 150-250 ℃, and the curing time is 15-30 minutes. In the cutting procedure, the dried and solidified product is transversely and longitudinally cut, and the fireproof heat-insulating board with specific size specification is produced.

The invention researches and designs the related main production process, belongs to independent research and design, and particularly relates to a spraying process, wherein each layer of carded fiber net is sprayed and is synchronously carried out with a lapping process of a lapping machine, so that the glue content of each layer of fiber net can be accurately controlled, and the uniformity of the whole glue content of the fireproof insulation board is ensured.

Please provide the detection result of the product, the parameters showing the effects of the technology of the present invention are listed. Parameters related to the uniformity of the gel content, embryo felt capacity data, and the glue soaking effect are also provided.

The uniformity of the colloid content is detected according to the section 2 of the test method of the reinforced product of GB/T9914.2-2013: and (5) detecting the standard of the content of the combustible matters of the glass fiber. And along the thickness direction of the product, sampling and detecting the lower layer, the middle layer and the upper layer, wherein the glue content of each layer is about 5%, and the deviation is less than 2%.

The heat conductivity coefficient of the product is 0.025-0.035W/(mK), and the heat preservation effect is better than that of rock wool (the heat conductivity coefficient is generally higher than 0.035W/(mK)); dimensional tolerance: length + -3 mm, width + -2 mm, thickness + -2 mm, right angle deviation + -2 mm/m, flatness deviation + -2 mm; the tensile strength perpendicular to the surface is more than or equal to 100KPa; the compression strength is more than or equal to 60KPa; the rebound rate is less than or equal to 10 percent; combustion performance class A1; the hydrophobicity result is as high as 99.9%, so that mildew and material performance reduction caused by water absorption of the heat preservation layer are reduced; the volume weight of the product is 130kg/m ³ On the left and right sides, under the same heat preservation and energy saving requirements, the product is lighter and thinner, and is beneficial to increasing the volume rate of the building.

Product performance test result summary table

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Example 8:

the publication patent document "a novel insulation board and a production process thereof" (publication number: CN 112142367A) provides a microwave curing device for curing and molding products.

In the embodiment, the same materials as in the embodiment 7 are adopted, and a curing process provided by a patent 'an insulation board production line' is adopted, wherein the difference is that the primary curing temperature is 110+/-5 ℃, the secondary curing is carried out at 150 ℃ for 10min, the volume weight of the obtained product is 362kg/m3, the heat conductivity coefficient is 0.0251W/(mK), the fireproof performance is A1 grade, the tensile strength is 533KPa, the compressive strength is 180KPa, the glue content is 4.1% (uniformity+/-1.5%), and the mechanical performance of the product can be further greatly improved by adopting the microwave curing equipment.

In the invention, glue solution with the solid content of 70% is used for producing the fireproof insulation board product with the glue content of 5%, only 52.5kg of glue solution is needed for each ton of glass fiber raw material, and only 22.5kg of water is needed for drying and curing. In other existing sizing methods, felt needs to be soaked in diluted glue solution, a large amount of glue solution is firstly applied, then a part of glue solution is extruded (glue extrusion) and then dried and solidified, and 928kg of water needs to be evaporated in case that 72kg of glue solution is applied to each ton of glass fiber. Therefore, the cost of glue solution can be saved by 150 yuan per ton of glass fiber raw material, the drying and curing energy can be saved by 290 yuan, and the total cost is saved by 440 yuan.

The process method provided by the invention adopts a lapping and spraying process, so that the glue solution consumption is greatly reduced, the drying time and energy consumption are greatly reduced, the energy conservation is facilitated, and the production efficiency is improved. The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The production process of the high-strength continuous glass fiber fireproof insulation board takes continuous glass fiber and water-soluble resin glue as raw materials, and is characterized by comprising the following steps:

2. The process for producing the high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the weight of the spraying water-soluble resin glue solution is 75kg-150kg per ton of glass fiber raw material in the step 4.

3. The process for producing the high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the needling treatment in the step 5 comprises pre-needling and barb needling, the fiber web layer obtained in the step 4 is needled from top to bottom through a needle machine, and then the fiber web layer is needled from bottom to top through the needle machine in a reverse direction to form a needled felt embryo felt containing glue.

4. The process for producing the high-strength continuous glass fiber fireproof insulation board according to claim 3, wherein the pre-needling compression ratio in the step 5 is 1% -29% and the barb compression ratio is 16% -33%.

5. The process for producing a high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the fiber web layer obtained in the step 4 is compressed before needling treatment in the step 5, and the compression ratio is 0.1-0.3% of the original thickness.

6. The process for producing the high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the step 6 is formed by adopting a hot air circulation curing furnace for heating curing or a microwave curing device for curing.

7. The process for producing a high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the heat conductivity coefficient of the obtained high-strength continuous glass fiber fireproof insulation board product is 0.025-0.035W/(mK); the glue content of the obtained high-strength continuous glass fiber fireproof insulation board product is 3-10%.

8. A production line of a high-strength continuous glass fiber fireproof insulation board, which is used for completing the production process of the high-strength continuous glass fiber fireproof insulation board according to any one of claims 1 to 6, and is characterized by comprising a feeding device, a unpacking device, an unpacking device, a carding device, a spraying device, a lapping device, a pre-needling device, a barb device, a drying and curing device and a cutting device which are connected in sequence; wherein, spray equipment sets up on the lapping equipment.

9. The production line of the high-strength continuous glass fiber fireproof insulation board, as claimed in claim 8, wherein the lapping equipment comprises a net inlet curtain, a net outlet curtain, a lapping trolley and a bottom curtain from top to bottom in sequence; the lapping method comprises ring curtain lapping or additive lapping;

10. The production line of the high-strength continuous glass fiber fireproof insulation board according to claim 9, wherein the spraying equipment further comprises a storage tank, a multistage centrifugal pump, a diversion control device and a flow monitoring device which are connected through pipelines, wherein water-soluble resin glue in the storage tank is conveyed to the diversion control device through the multistage centrifugal pump, and is conveyed to each spray head of the spraying pipe through pipeline diversion by the diversion control device; and a flow monitoring device is arranged at each shunt outlet of the shunt control device.