CN115262081A - Production process and production line of high-strength continuous glass fiber fireproof insulation board - Google Patents
Production process and production line of high-strength continuous glass fiber fireproof insulation board Download PDFInfo
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- CN115262081A CN115262081A CN202210876308.7A CN202210876308A CN115262081A CN 115262081 A CN115262081 A CN 115262081A CN 202210876308 A CN202210876308 A CN 202210876308A CN 115262081 A CN115262081 A CN 115262081A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
- D04H1/488—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with bonding agents
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4218—Glass fibres
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, through researching and modifying the production process, the production efficiency is improved, the integral uniformity of the product is ensured, the continuous and efficient production of the heat-insulating plate with 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
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 heat insulation of the building wall body by the external wall heat insulation material is also an important factor influencing the energy saving of the building. At present, various auxiliaries such as curing agents need to be added to achieve a bonding effect and improve product performance when the insulation board is prepared, but the added auxiliaries are combustible, and the fireproof performance of the product is reduced. In the existing standard, the heat conductivity coefficient and the fireproof performance of the insulation board are concerned, however, the uniformity of glue content of the product is not paid attention, and the problem that the external glue dipping saturation of the glass fiber is easy to occur but the internal part of the glass fiber is not fully soaked due to long time consumption of the resin soaking process is solved; the traditional gum dipping process consumes long time; in the product with insufficient internal impregnation, the structure of the product can be damaged to cause fracture in extreme environments such as strong wind or earthquake due to poor adhesion effect.
In addition, in order to pursue high volume weight, the prior art provides various solutions, and a patent publication of 'a novel insulation board and a production process thereof' (publication No. CN 112142367A) provides an insulation board production line only containing inorganic glass fibers and water-soluble adhesives, wherein the insulation board product contains 100 parts of glass fibers and 2-15 parts of phenolic resin, and can realize that the heat conductivity coefficient is as low as 0.028-0.035W/(mK), and the volume weight is 150-380 kg/m3The process comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, glue extruding and curing 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 amount of the added glass fiber in a unit time in the spraying process is 15-20%, and the amount of the phenolic resin corresponding to 100g of glass fiber in the obtained product is 4-6 g; the process needs to evaporate a large amount of water, and the energy consumption is high; and the process of extruding the glue is needed, so that the waste material is wasted, the time and the 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 heat-insulating plate in the prior art, the invention provides a production line and a production process of different high-strength continuous glass fiber fireproof heat-insulating plates, so that the use of resin glue is reduced, the production efficiency is improved, the production cost is reduced, and the obtained product has better heat-insulating and protective properties. The invention provides a production process of a high-strength continuous glass fiber fireproof insulation board, which is characterized in that continuous glass fibers and water-soluble resin adhesive are used as raw materials, and a product is obtained through the steps of feeding, fluffing, finishing and screening, gluing, needling into a felt, curing and sizing; the production process comprises the following steps:
step 1, feeding, namely providing a continuous glass fiber raw material by using an automatic feeding system;
step 4, sizing and lapping, namely lapping the fiber mesh obtained in the step 3 and spraying water-soluble resin glue to obtain a fiber mesh layer;
and 7, sizing, namely transversely and longitudinally cutting the dried and cured product to produce the fireproof insulation board with a specific size specification.
Preferably, the flow rate of spraying the water-soluble resin glue in the step 4 is 20-60L/h.
Furthermore, in the step 4, the weight of the sprayed water-soluble resin glue solution is 75kg-150kg per ton of the 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 reversely needled from bottom to top through the needle machine to form the glue-containing needled felt blank felt.
Furthermore, in the step 5, the pre-needling compression ratio is 1-29%, and the barb compression ratio is 16-33%.
Further, before needling treatment in step 5, the fiber web layer obtained in step 4 is compressed to 0.1-0.3% of the original thickness.
Preferably, in step 6, a hot air circulation curing oven is used for heating, curing and molding or microwave curing equipment is used for molding.
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 gel content of the high-strength continuous glass fiber fireproof insulation board product is 3% -10%, and the optimal selection is 4%.
As a second aspect of the invention, the invention provides a production line of a high-strength continuous glass fiber fireproof insulation board, which is used for completing a production process of the high-strength continuous glass fiber fireproof insulation board, and the production line comprises a feeding device, a unpacking device, an opening device, a carding device, a spraying device, a lapping device, a pre-pricking device, a barb device, a drying and curing device and a cutting device which are connected in sequence; wherein, the spraying equipment is arranged 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 the steps of loop curtain type lapping or additive lapping;
the spraying equipment comprises a spraying pipe, a spray head on the spraying pipe and an air injection pipe arranged in parallel with the spraying pipe, wherein the spraying pipe and the air injection pipe are arranged below the lapping trolley, the spray head is horizontally arranged, and the fiber net is sprayed with water-soluble resin glue;
the fiber net output in the carding procedure reaches the net outlet curtain through the net inlet curtain, the net outlet curtain transmits the fiber net to the lapping trolley, and the lapping trolley reciprocates to lap the sprayed fiber net with specific moisture content on the bottom curtain to form a fiber net layer.
Preferably, the spraying equipment further comprises a storage tank, a multistage centrifugal pump, a flow distribution control device and a flow monitoring device which are connected through a pipeline, the water-soluble resin glue in the storage tank is conveyed to the flow distribution control device through the multistage centrifugal pump, and the water-soluble resin glue is conveyed to each spray head of the spraying pipe through the flow distribution control device in a flow distribution manner through the pipeline; and flow monitoring devices are installed at the shunting outlets of the shunting control device.
Compared with the prior art, the invention has the beneficial effects that:
1. the traditional glass fiber reinforced composite material generally adopts a process of firstly needling and then spraying or gumming, and because the needled embryo felt has large volume weight, is relatively compact and thick, the glue solution is not easy to soak and the uniformity is not easy to control. Therefore, the method has long impregnation time, or a large amount of resin glue solution needs to be applied in the spraying process to improve the impregnation effect, but the impregnation uniformity of the glue solution cannot be ensured; and a large amount of glue applying process needs to be assisted by a glue extruding process, and a large amount of water is introduced into a high-content glue solution, so that the subsequent curing process consumes long time and consumes high energy. The single-layer fiber web is firstly glued by a spraying process and then needled. The method has the advantages that the glue content of each layer of the fiber net can be accurately controlled, so that the uniformity of the whole glue content of the fireproof heat-insulation board is ensured.
2. According to the invention, pre-needling and needling are carried out after glue spraying, a passage in the vertical direction is formed on the fiber net layer, and in the curing process, heat is favorably transferred from the surface to the inside, so that the temperature difference between different layers is reduced, the curing time is shortened, and the production efficiency is improved.
3. The heat conductivity coefficient of the heat insulation board product provided by the invention is 0.025-0.035W/(mK), and the heat insulation effect is superior to that of rock wool and the heat insulation board made of the existing glass fiber composite material.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a flow chart of a production process of the high-strength continuous glass fiber fireproof insulation board of the invention;
FIG. 2 is a schematic diagram of a production line structure of the high-strength continuous glass fiber fireproof insulation board of the invention;
FIG. 3 is a schematic view of an unpacking process apparatus according to the present invention;
FIG. 4 is a schematic view of a carding process unit according to the invention;
FIG. 5 is a schematic view of the feed roll configuration of the carding process unit according to the invention;
FIG. 6 is a schematic view of a spray process apparatus according to the present invention;
FIG. 7 is a schematic view of a lapping process apparatus according to the present invention;
figure 8 is a schematic view of a pre-barbed process apparatus and a barbed process apparatus according to the present invention.
Description of reference numerals: 101 raw material placing frame, 102 storage bin, 103 raw material conveying device, 104 weighing device, 201 input curtain, 202 small flat curtain, 203 inclined curtain, 204 bale opening beater, 601 feeding roller, 602 chest cylinder, 603 transfer roller, 604 main cylinder, 605 working roller, 606 wool stripping roller, 607 doffer, 608 disordered roller, 609 cotton stripping roller, 701 storage tank, 702 multistage centrifugal pump, 703 spray pipe, 704 spray head, 705 jet pipe, 706 shunt control device, 707 flow monitoring device, 801 net inlet curtain, 802 net outlet curtain, 803 net laying trolley and 804 bottom curtain; 6011 feed roller, 6012 pressure spring, 6013 spindle nose guide block, 6014 carding machine frame.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. 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 invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As the textile sector, there are special structures, such as the cylinder, which are the main elements of the carding machine and which act to strip the fibers initially carded by the lickerin rollers and bring them into the working area of the cylinder cover for further fine carding, straightening and uniform mixing, and transfer of the fibers to the doffer.
Doffers, on a carding machine, are used to strip the fibers from the cylinder.
The disorder roller is a roller with card clothing and plays a role in disorder. Most of the fibers are in a single fiber state of straightening and parallel due to the carding action of carding units at all stages of the nonwoven carding machine, so that the difference of longitudinal and transverse properties of the fiber web is large, most of nonwoven materials require the fibers to be randomly arranged in the fiber web to form a disordered state, and the disordered roller can enable the fibers to tend to be in the disordered state under the action of air flow.
Example 1: production line of continuous fine fire prevention heated board of glass of high strength
As shown in fig. 2, the automatic cotton feeding, unpacking, coarse opening, large bin cotton mixing, fine opening, carding, net laying, pre-needling, barb, drying and curing and cutting processes are respectively realized by a feeding device 1, a unpacking 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 net laying device 8, a pre-needling device 9, a barb device 10, a drying and curing device 11 and a cutting device 12 which are connected in sequence.
As shown in fig. 2, the feeding device 1 realizes an automatic feeding function of a whole package of glass fiber raw materials. As shown in fig. 2, the process device comprises a raw material placing rack 101, a storage bin 102, a raw material conveying device 103 and a weighing device 104 which are connected in sequence. The whole package of glass fiber raw materials is placed on the raw material placing frame 101 through automatic logistics, the raw materials are poured into the storage bin 102 through the lifting and overturning functions of the raw material placing frame 101, the raw material conveying device 103 conveys the raw materials output from the outlet at the lower end of the storage bin to the weighing device 104, the weighing device 104 can accurately weigh the raw materials, and the weighed raw materials are conveyed to the bale opener.
As shown in fig. 2, the raw material placing rack 101, the storage bin 102 and the raw material conveying device 103 are respectively provided in two sets, and are arranged perpendicular to the weighing device 104 to supply the raw material to the weighing device 104. When the yield is larger, two sets of feeding devices are more convenient or when one set fails, the other set can continue to feed.
The weighing device 104 is specifically a weighing and conveying device or a re-conveying belt, and is used for weighing the conveyed glass fibers and then feeding the glass fibers into a bale opener in the next process, so that the feeding precision is ensured.
Further, be equipped with the ton package of glass fiber raw materials, the design of four angles of one of them side and four angles of bottom surface has solid fixed ring, and raw materials rack 101 design has the hasp, corresponds with the solid fixed ring of ton package, wraps the lock with ton on the raw materials rack. The raw materials rack design has elevating system, tilting mechanism, and elevating system adopts hydraulic system, promotes the raw materials to storage silo 102 upper end, and tilting mechanism adopts hydraulic system, overturns the raw materials rack to pour the raw materials into the storage silo.
Further, the storage bin 102 is of a reverse funnel structure, a strip-shaped discharge port is designed at the lower end of the storage bin, a beater is designed at the discharge port, the diameter of the beater is 400-500 mm, the beater adopts a nailing strip type, and raw materials are uniformly stirred from the storage bin to the raw material conveying device 103 below the storage bin.
Further, the raw material conveying device 103 includes a frame made of carbon steel and a conveying curtain. The conveying curtain is a PVC rubber curtain, the speed reducer is controlled by a frequency converter to carry out transmission, the speed range is 2.5 m/min to 20 m/min, and the raw materials are conveyed to the weighing device 104.
Further, the weighing device 104 includes a fixed frame, a conveying 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 carry out transmission. The accurate electronic scale is total 4, and the side is equipped with in the below of carrying the curtain, and the display screen can show weight in real time. When the set weight is reached, the weighing device 104 conveys the raw materials to the next procedure, so that the material blockage of the next procedure caused by continuous feeding is avoided.
The invention opens the glass fiber bales in various grades through the bale opening device and the opening device, which is convenient for uniformly spreading the glass fiber on the cotton mixing curtain according to the program control.
As shown in fig. 3, the unpacking device comprises an input curtain 201, a small flat curtain 202, a slant curtain 203 and an unpacking beater 204. The automatic feeding device in the previous process is characterized in that materials conveyed by the weighing conveyor belt freely fall onto the input curtain 201 for storage, the materials are conveyed to the small flat curtain 202 at the lower end of the inclined curtain 203 through transmission, the small flat curtain 202 at the lower end is conveyed to the inclined upper side by the inclined curtain 203, and the unpacking beater 204 rotates to take the materials and drives the grabbed materials into the next process.
Furthermore, the inclined curtain 203 is in a nail strip type, and an anti-static curtain is used as base cloth, so that the problem of raw material static in the conveying process of the inclined curtain is solved.
Furthermore, the diameter of the unpacking beater 204 is 400mm-500mm, and the beater adopts a nailing strip type, so that the raw materials are more uniformly stirred.
And the coarse opening equipment is used for opening the glass fibers conveyed by the unpacking equipment in an opening machine 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 frame and a strong magnet, and adopts a structure commonly used in the field.
Specifically, the rack is formed by laser cutting and welding of the rack, the wallboard is an iron plate with the thickness of 5mm-10mm, and a sheet metal part with the thickness of 2mm-5mm is fed; the input curtain is a PVC rubber curtain; the feeding roller is fed by adopting double licker-in rollers, and the diameter of the roller is 70mm-90mm; the diameter of the opening cylinder is 400mm-500mm, and the card clothing is wound on the opening cylinder at the rotating speed of 800-1000 r/min; the cotton feeding fan is controlled by a motor through independent frequency conversion, and the air quantity can be automatically adjusted according to the yield. And conveying the raw materials subjected to the coarse opening treatment to next large-bin cotton mixing equipment through a cotton conveying fan and a pipeline.
The large-bin cotton mixing equipment is used for fully mixing and storing the coarsely opened glass fibers in a cotton mixing large bin so as to achieve the effect of continuous production. The cotton blending 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 a PVC leather curtain as base cloth, the diameter of a curtain guide roller is 150mm, and the frequency conversion control is carried out; the diameter of the beater is 400mm-500mm, the diameter of the nails is 4mm, the nails are spaced at intervals of 50mm,3 rows are uniformly distributed, the opening is more uniform, the air quantity is effectively controlled, and flying and air flow are reduced; the photoelectric control system can effectively control the cotton quantity and the material level filling level in the cotton box, improve the operation efficiency and save energy.
Furthermore, 2 sets of condenser are arranged above the cotton box for large-bin cotton mixing, and dust collection interfaces are arranged on the condenser and the punching part and are connected to a central dust removal unit.
The tail end of the large bin is directly connected with fine opening equipment.
And the fine opening equipment is used for further opening the glass fibers fed from the large-bin cotton mixing machine in the opening machine and conveying the glass fibers to the next working procedure through the cotton conveying fan. The raw materials of the fine opening equipment are conveyed to a vibrating cotton box through a cotton conveying fan and a pipeline and conveyed to a carding machine through a belt weigher.
The carding equipment fully and uniformly mixes the opened glass fibers on a carding machine, outputs the mixed and disorderly fibers after doffer and condensation, and conveys the mixed and disorderly fibers to the next lapping process. As shown in FIG. 4, the carding machine includes a feed roll 601, a breast cylinder 602, a transfer roll 603, a main cylinder 604, a work roll 605, a stripping roll 606, a doffer 607, a dancer 608, and a doffer 609. In order to continuously, uniformly and accurately feed fiber flocks, a high-precision carding and feeding system is adopted, and firstly, uniform, quantitative and continuous fibers are conveyed to a chest cylinder through a feeding roller 601 for grabbing; the breast cylinder 602 is provided with a pair of working rollers 605 and a stripping roller 606, and the fibers are carded by a carding unit consisting of the breast cylinder 602, the working rollers 605 and the stripping roller 606, mixed to a transfer roller 603 and then conveyed to a main cylinder 604 by the transfer roller 603. The main cylinder 604 is provided with 5 pairs of working rollers 605 and a wool stripping roller 606 which are combined to form 5 carding points, fibers are carded by a carding unit consisting of the working rollers 605 and the wool stripping roller 606, then stripped by 2 groups of upper doffers 607 and lower doffers 607, stripped by a disorder roller 608 to a cotton stripping roller 609, and finally conveyed to the next procedure by an output curtain.
As shown in fig. 5, the feed roller 601 is composed of 4 feed rollers 6011, 2 each above and below. 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 a shaft head guide block 6013, a groove track is arranged on a carding machine frame 6014, a plurality of screw holes are formed in 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 are not contacted with the lower 2 rollers, the gap is 1mm-5mm, and the up-down 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 rotate reversely, and the metal is prevented from entering the equipment to damage card clothing.
The spraying equipment is provided with a uniform glue applying (spraying) device which is synchronously lapped on the bottom curtain together with the lapping machine, and the spraying equipment is arranged on a lapping trolley of the lapping machine and continuously and uniformly sprays glue 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 spray pipe 703, a spray head 704, a gas spray pipe 705, a flow distribution control device 706, a flow monitoring device 707 and pipelines. Putting water-soluble phenolic resin into a storage tank 701, conveying phenolic resin glue liquid to a flow distribution control device 706 through a multistage centrifugal pump, then distributing the phenolic resin glue liquid 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, mounting spray heads 704 on the spray pipe 703, horizontally arranging the spray heads 704, and spraying the water-soluble phenolic resin glue liquid onto a fiber net; the accuracy and uniformity of glue application (spraying) in the continuous production process are accurately 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 flow dividing control device, selecting the specification of the spray head 704 and the like.
Furthermore, the spraying pipe 703 is a stainless steel circular pipe, the outer diameter of the pipe is 20-50mm, the thickness of the pipe is 2-5mm, the pipe can be split into two parts, and a spray head conveying pipe can be conveniently arranged in the spraying pipe. Threaded holes are formed in the length direction of the spray pipe, the hole distance is 20-100mm, and the spray head 704 is convenient to mount and dismount.
Furthermore, the spraying process is designed by using a flow dividing control device 706, the flow dividing control device can divide the phenolic resin glue solution provided in the multistage centrifugal pump into a plurality of pipelines, the flow dividing amount of each pipeline can be controlled independently or in a linkage manner, and a flow monitoring device 707 is installed at each flow dividing outlet of the flow dividing control device, so that the monitored flow signal can be fed back in real time. During 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 a set range, a signal is fed back to the shunt control device, and the shunt control device automatically adjusts to reach a 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 flow rate is adaptively adjusted 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.
Furthermore, the pressure adjusting function of each shunt pipeline is designed on the shunt control device, so that the pressure at all the spray heads is 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 flow of the set pipelines is consistent, the pressure at the spray head is also different, so that the spraying range of the spray head can be changed, and the spraying uniformity is influenced. Therefore, the flow dividing control device is designed with a function of adjusting the pressure of each flow dividing pipeline, the conveying pressure of each pipeline of the flow control device is adjusted according to the actual spraying range of the spray head, and the uniform spraying is ensured.
Further, the gas injection pipe 705 is installed together with the shower pipe and below the shower pipe, the medium of the gas injection pipe is compressed air, and the pressure range is 0.2-0.8MPa. Round holes or long grooves are formed in the air jet pipes at equal intervals, the opening direction is consistent with the spraying direction of the spray heads and is perpendicular to the fiber net, and the phenomenon that the fiber net is bonded with the spray heads or the spray pipes due to the fact that the fiber net floats to the spray pipes due to inertia when the lapping trolley moves to the spraying direction is avoided.
And the lapping equipment is used for continuously laying the fiber net 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 comprises a net feeding curtain 801, a net discharging curtain 802, a net laying trolley 803 and a bottom curtain 804. The lapping method comprises loop curtain lapping or additive lapping. The fiber web output by the carding process reaches the net outlet curtain 802 through the net inlet curtain 801, the net outlet curtain transmits the fiber web to the lapping trolley 803, and the fiber web with the specific moisture content after being sprayed is lapped on the bottom curtain 804 through the reciprocating motion of the lapping trolley 803 to form a fiber web layer which is transmitted to the next process. The shower 703 is located below the lapping cart 803.
Further, the net inlet curtain 801 and the net outlet curtain 802 adopt inlet antistatic high-strength carbon curtains. The lapping trolley 803 is designed and provided with a spraying device, and the fiber net is firstly sprayed and then lapped on the bottom curtain. The bottom curtain 804 adopts a split-charging type structure and consists of curtain rods and anti-skid leather strips, and each curtain rod is provided with 5-15 anti-skid leather strips.
The lapping machine conveys the paved multilayer fiber mesh layer to the pre-needling machine through a feeding machine at the front section of the pre-needling machine.
Pre-needling apparatus and barb apparatus, as shown in FIG. 8, pre-needling compresses the web layer and needles it from top to bottom with needles to initially reinforce the web layer. The fiber mesh layer is needled reversely from bottom to top through the felting needles by the barbs, so that the strength of the mesh layer is further enhanced, and the glue-containing needled felt blank felt is formed. The felt output by the pre-needling machine enters the barb machine through the input curtain of the barb machine. The pre-needling equipment and the barb equipment comprise a front feeding machine, a pre-needling machine and a barb machine.
Furthermore, 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 have a certain angle and are adjustable in angle and in a horn mouth shape. The inlet distance is large, so that a thick fiber layer coming out of the bottom curtain of the lapping machine can smoothly enter. The outlet distance is automatically adjusted through the transmission of two pairs of gears and the pressurization of the air cylinder, and is changed along with the change of the thickness of the fiber layer, and the adjusting range is 5mm-100mm. In one embodiment, the thickness of the net layer output by the curtain of the lapping machine is about 35-105 cm, the curtain is fed through a horn mouth of a pre-needling machine, the net layer is initially compressed to 35mm, the net layer enters the pre-needling machine, the thickness of the net layer is 25-30mm after the net layer is needled by the pre-needling machine, and the final thickness of the product reaches 20-25 mm after the net layer is further needled and compressed by a barb machine.
The pre-pricking compression ratio can be 1-29%, and the barb compression ratio is about 16-33%. The compression ratio of each needling process can be adjusted according to the thickness of the product.
Furthermore, an upper feeding roller and a lower feeding roller with cotton strips are arranged at the pre-needling inlet, the cylinders are used for pressurizing, the power of the cylinders is transmitted by an upper feeding roller and a lower feeding roller of the feeding leather curtain of the feeding machine through chains, so that the gap between the roller rollers is changed along with the change of the product, and the thick fiber layer can smoothly enter the pre-needling machine after being further pressed.
Furthermore, the input ends of the screen supporting plate and the screen stripping plate in the pre-needling machine and the barb machine are in a chamfer folding mode, and a large enough adjustable distance is reserved between the upper screen plate and the lower screen plate so as to adapt to the fact that products with the thickness of 40mm-60mm can pass through smoothly.
The felt output by the barb machine reaches a drying and solidifying device through a conveying belt.
And drying and curing equipment, and carrying out felt curing molding on the rubber-containing blank by using a hot air circulation curing furnace. Furthermore, parameters such as the effective length of the hot air circulation curing furnace equipment, the production line speed, the group number and the power of the hot air circulation system, the power and the flow of each fan and the like can be calculated according to the specification parameters and the capacity requirements of the products, so that the technical requirements of the drying curing equipment can be determined.
Further, the speed adjusting range of the production line of the device is determined to be 0.2m-5m/min, the product width adapting range is 1000mm-2000mm, the product thickness adapting range is 10mm-100mm, and the product density adapting range is 80-200kg/m3The curing temperature is 150-250 ℃, and the yield can reach 600-2000 kg/h.
The heat 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 cured product to produce a finished product with a specific size and specification. The process equipment comprises longitudinal cutting, transverse cutting, edge breaking, length measuring and plate surface dust collection. The longitudinal cutting adopts a disc type alloy cutter, the cutter is controlled to move up and down through a cylinder, and a bottom knife roller is arranged under the longitudinal cutting cutter. During rip cutting, the fire prevention heated board passes through between rip cutting cutter and the end knife-roller, and cylinder control cutter pushes down and presses on the fire prevention heated board, cuts the product through the cutter passive rotation. The transverse cutting adopts a disc type alloy flying saw and is actively rotated through the transmission of a motor. The guide rail is arranged in the width direction, and the electric motor drives and controls the flying saw to reciprocate in the width direction. A transverse cutting bed knife groove is designed and installed under the cutter, and the flying saw can transversely cut the fireproof heat-insulation board along the groove.
According to the production line provided by the invention, the spraying equipment is arranged on the lapping equipment, so that the processes of spraying and lapping can be conveniently carried out at the same time. The glue applying device has the advantages that the glue can be continuously and uniformly applied to the single-layer fiber web, the whole process is controllable, the uniformity and controllability of the glue content of a product formed by the multi-layer fiber web are guaranteed, the requirement of the product on the glue content can be guaranteed, the glue solution can be saved, the water content of the product after glue application is lower, and a large amount of energy cost is saved for later 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 fiber subjected to short cutting and water-soluble resin glue as raw materials, as shown in figure 1, the production method comprises the steps of feeding, fluffing, finishing and screening, sizing, felting, curing and sizing, specifically, 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, net laying, pre-needling, barb, drying, curing and cutting.
As a typical example, the raw material used is alkali-free glass fiber as continuous glass fiber, and one or more glass fiber combinations selected from alkali-free glass fiber, medium alkali glass fiber, TCR glass fiber, high modulus glass fiber, and the like are all available from Taishan glass fiber Co. The chopped length is 30-100mm, and the fiber diameter is 6-17 μm.
The water-soluble resin glue as the raw material is water-soluble phenolic resin with the solid content of 35-70 percent;
the high-strength continuous glass fiber fireproof insulation board has the glue content ranging from 3% to 10%, preferably 5%, and when the glue content is low, the drawing strength of a finished product is low, and when the glue content is too large, the flame retardant property of the product is poor; the weight of the water-soluble resin glue solution is 75kg-150kg per ton of glass fiber raw material.
Specifically, in the automatic feeding process, ton packages of glass fiber raw materials are placed on a raw material placing frame of an automatic feeding system, and the automatic feeding of the raw materials is realized through the automatic feeding system; in the unpacking procedure, glass fibers are unpacked in various grades, and are uniformly spread on a cotton mixing curtain according to program control; in the coarse opening process, the glass fiber conveyed by opening the package is further opened and conveyed to the next process by a cotton conveying fan; in the large-bin cotton mixing process, the coarsely opened glass fibers are fully mixed and stored to achieve the effect of continuous production; in the fine opening process, the glass fiber conveyed in the previous process is further opened and conveyed to the next process through a cotton conveying fan; in the carding process, the opened glass fibers are fully and uniformly mixed, and are output to be parallel or messy after being subjected to doffer and coagulation messy, and then are conveyed to the next process; in the spraying process, a spraying device is designed and installed on a lapping trolley of a lapping machine to spray water-soluble resin glue on the glass fiber net, and the flow range in the spraying process can be 20-60L/h. In the lapping procedure, the fiber net sprayed with the water-soluble resin adhesive is continuously paved on the bottom curtain in multiple layers through the reciprocating motion of a lapping trolley; in the pre-needling process, the fiber mesh layer is compressed and needled from top to bottom through the felting needles, so that the strength of the fiber mesh layer is preliminarily enhanced; in the barb process, the fiber mesh layer is needled reversely from bottom to top through the felting needles to further strengthen the strength of the mesh layer and form the needled felt blank felt containing the rubber; 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 process, the dried and solidified product is cut transversely and longitudinally to produce the fireproof insulation board with specific size and specification.
The invention researches and designs related main production processes, belongs to independent research and design, particularly relates to a spraying process, sprays each layer of carded fiber net, and synchronously carries out lapping process with a lapping machine, and can accurately control the glue content of each layer of fiber net, thereby ensuring the uniformity of the whole glue content of the fireproof insulation board.
Please provide the detection result of the product, and please list the parameters showing the effect of the present invention. The parameters related to the uniformity of the colloid content, the capacity data of the embryo felt and the soaking effect of the colloid are also provided.
Detecting the uniformity of the colloid content according to the part 2 of the GB/T9914.2-2013 enhanced product test method: and (4) measuring the combustible content of the glass fiber according to the standard. And (3) sampling and detecting the lower layer, the middle layer and the upper layer along the thickness direction of the product, wherein the gel 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 superior to that of rock wool (the heat conductivity coefficient is generally higher than 0.035W/(mK)); dimensional tolerance: the length is +/-3 mm, the width is +/-2 mm, the thickness is +/-2 mm, the right angle deviation is +/-2 mm/m, and the flatness deviation is +/-2 mm; the tensile strength vertical to the surface is more than or equal to 100KPa; the compressive strength is more than or equal to 60KPa; the rebound rate is less than or equal to 10 percent; the combustion performance is A1 grade; the hydrophobicity result is as high as 99.9%, and the mildew and the material performance reduction caused by water absorption of the heat insulation layer are reduced; the product volume weight is 130kg/m3On the left and right sides, under the same heat preservation and energy conservation requirements, the product is lighter and thinner, and is beneficial to increasing the volume rate of buildings.
Summary table of product performance testing results
Example 8:
the patent publication of "a novel insulation board and a production process thereof" (publication number: CN 112142367A) provides a microwave curing device for implementing curing molding of a product.
In the embodiment, the same materials as in the embodiment 7 are adopted, and the curing process provided by the patent of 'a production line of insulation boards' is adopted, wherein the difference is that the one-time curing temperature is 110 +/-5 ℃,heating the secondary curing at 150 ℃ for 10min to obtain a product with the volume weight of 362kg/m3The heat conductivity coefficient is 0.0251W/(mK), the fireproof performance is A1 grade, the tensile strength is 533KPa, the compression strength is 180KPa, and the gel content is 4.1% (uniformity +/-1.5%), and the mechanical property of the product can be further greatly improved by adopting the microwave curing equipment.
In the invention, glue solution with solid content of 70% is used to produce the fireproof insulation board product with 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 needs to be evaporated for drying and curing. In other existing sizing methods, a felt needs to be soaked in diluted glue solution, a large amount of glue solution is applied to the felt firstly, then a part of the glue solution is extruded (glue extrusion) and then dried and solidified, and 928kg of water needs to be evaporated for example when 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, 290 yuan for drying and curing energy is saved, and the total cost is saved by 440 yuan.
The process method provided by the invention adopts a process of lapping and spraying simultaneously, so that the glue solution consumption is greatly reduced, the drying time and energy consumption are greatly reduced, the energy is greatly saved, and the production efficiency is improved. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A production process of a high-strength continuous glass fiber fireproof insulation board takes continuous glass fibers and water-soluble resin adhesive as raw materials, and is characterized by comprising the following steps:
step 1, feeding, namely providing a continuous glass fiber raw material by using an automatic feeding system;
step 2, fluffing, namely performing coarse opening on the continuous glass fiber, and then performing cotton mixing process and fine opening treatment;
step 3, finishing and discharging the net, and performing finishing and discharging treatment by using a carding machine to obtain a fiber net;
step 4, sizing and lapping, namely lapping the fiber mesh obtained in the step 3 and spraying water-soluble resin glue to obtain a fiber mesh layer;
step 5, needling to form a felt, and carrying out needling treatment on the fiber mesh layer obtained in the step 4 to obtain a glue-containing needled felt blank felt;
step 6, curing, namely heating, curing and forming the glue-containing needled felt blank felt 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 a specific size specification.
2. The production process of the high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the weight of the sprayed water-soluble resin glue solution is 75kg-150kg per ton of glass fiber raw material in the step 4.
3. The production process of 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, the fiber net layer obtained in the step 4 is needled from top to bottom through a needle machine, and then the fiber net layer is reverse needled from bottom to top through the needle machine to form the glue-containing needled felt embryonic felt.
4. The production process of the high-strength continuous glass fiber fireproof insulation board according to claim 3, wherein in the step 5, the pre-needling compression ratio is 1-29%, and the barb compression ratio is 16-33%.
5. The production process of the high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the fiber mesh layer obtained in the step 4 is compressed before needling in the step 5, and the compression ratio is 0.1-0.3% of the original thickness.
6. The production process of the high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein in the step 6, a hot air circulation curing oven is adopted for heating, curing and forming or microwave curing equipment is adopted for forming.
7. The production process of the high-strength continuous glass fiber fireproof insulation board according to claim 1, wherein the thermal conductivity coefficient of the obtained high-strength continuous glass fiber fireproof insulation board product is 0.025-0.035W/(mK); the gel content of the high-strength continuous glass fiber fireproof insulation board product is 3% -10%, and the optimal selection is 4%.
8. The production line of the high-strength continuous glass fiber fireproof insulation board 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 opening device, a carding device, a spraying device, a lapping device, a pre-pricking device, a barb device, a drying and curing device and a cutting device which are sequentially connected; wherein, the spraying equipment is arranged on the lapping equipment.
9. The production line of the high-strength continuous glass fiber fireproof insulation board according to claim 8, wherein the net laying equipment comprises a net inlet curtain, a net outlet curtain, a net laying trolley and a bottom curtain from top to bottom in sequence; the lapping method comprises the steps of loop curtain type lapping or additive lapping;
the spraying equipment comprises a spraying pipe, a spray head on the spraying pipe and an air injection pipe arranged in parallel with the spraying pipe, wherein the spraying pipe and the air injection pipe are arranged below the lapping trolley, the spray head is horizontally arranged, and the fiber net is sprayed with water-soluble resin glue;
the fiber net output in the carding procedure reaches the net outlet curtain through the net inlet curtain, the net outlet curtain transmits the fiber net to the lapping trolley, and the lapping trolley reciprocates to lap the sprayed fiber net with specific moisture content on the bottom curtain to form a fiber net layer.
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 shunt control device and a flow monitoring device which are connected through a pipeline, the water-soluble resin glue in the storage tank is conveyed to the shunt control device through the multistage centrifugal pump, and the water-soluble resin glue is conveyed to each spray head of the spraying pipe through the pipeline by the shunt control device; and flow monitoring devices are installed at the shunting outlets of the shunting control device.
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Cited By (1)
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| CN115925318A (en) * | 2022-11-23 | 2023-04-07 | 泰山玻璃纤维有限公司 | Fireproof insulation board added with ground glass and preparation method thereof |
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| CN115262081B8 (en) | 2023-06-27 |
| CN115262081B (en) | 2023-05-26 |
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Effective date of registration: 20230524 Address after: 271000 north of fiberglass South Road, Dawenkou Industrial Park, Daiyue district, Tai'an City, Shandong Province Applicant after: TAISHAN FIBERGLASS Inc. Applicant after: Mount Taishan Fiberglass (Taiyuan) Co.,Ltd. Address before: 271000 north of fiberglass South Road, Dawenkou Industrial Park, Daiyue district, Tai'an City, Shandong Province Applicant before: TAISHAN FIBERGLASS Inc. |
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Correction item: Patentee|Address|Patentee Correct: TAISHAN FIBERGLASS Inc.|271000 north of fiberglass South Road, Dawenkou Industrial Park, Daiyue district, Tai'an City, Shandong Province|Mount Taishan Fiberglass (Taiyuan) Co.,Ltd. False: TAISHAN FIBERGLASS Inc.|271000 north of fiberglass South Road, Dawenkou Industrial Park, Daiyue district, Tai'an City, Shandong Province Number: 21-02 Volume: 39 Correction item: Patentee|Address|Patentee Correct: TAISHAN FIBERGLASS Inc.|271000 north of fiberglass South Road, Dawenkou Industrial Park, Daiyue district, Tai'an City, Shandong Province|Mount Taishan Fiberglass (Taiyuan) Co.,Ltd. False: TAISHAN FIBERGLASS Inc.|271000 north of fiberglass South Road, Dawenkou Industrial Park, Daiyue district, Tai'an City, Shandong Province Number: 21-02 Page: The title page Volume: 39 |
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