CN110591282A - Fireproof grating and preparation method thereof - Google Patents
Fireproof grating and preparation method thereof Download PDFInfo
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- CN110591282A CN110591282A CN201910258556.3A CN201910258556A CN110591282A CN 110591282 A CN110591282 A CN 110591282A CN 201910258556 A CN201910258556 A CN 201910258556A CN 110591282 A CN110591282 A CN 110591282A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K2003/026—Phosphorus
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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Abstract
The invention provides a fire-proof grating and a preparation method thereof, wherein the preparation method of the fire-proof grating comprises the steps of S1 preparation of low-viscosity phenolic resin; s2 preparing phenolic resin sizing material; s3 yarn guide; s4 dipping; s5 pultrusion, the fireproof grating and the preparation method thereof have the advantages of simple process, environmental protection, good continuity, stable production, high strength and good flame retardant property.
Description
Technical Field
The invention relates to the technical field of composite material product preparation, in particular to a fireproof grating and a preparation method thereof.
Background
The fireproof grating (plate) is a grating-shaped structure which is formed by connecting a plurality of grating bars together through penetrating rods, generally has the advantages of ventilation, lighting, heat dissipation, explosion prevention, good anti-skid property, acid-base corrosion resistance, high fire resistance and the like, and is widely used for building offshore oil platforms, pedestrian passageways, ship decks, subways, coal mines and other emergency escape passageways or life-saving places.
In the structural design process of the fireproof grating, from the angle of stress mechanics, the grating bars are designed into an I-shaped structure, so that the fireproof grating is more economical and practical; considering the wind pressure, certain intervals are reserved between the grid bars, but the intervals cannot be too wide, so that the high-heeled shoes of women are prevented from being clamped; in manufacturing, the "I" grid bars are typically secured together by tie-rods to form a fire grid.
At present, the grid bars are generally prepared by a pultrusion process using phenolic resins, which process has been found to have the following disadvantages during production:
firstly, the phenolic resin has high viscosity and poor fluidity, the storage life of phenolic resin sizing materials is short, and the permeability of glass fibers is poor, so that the phenolic resin sizing materials are difficult to be fully infiltrated by the phenolic resin, so that the continuity of the production process of phenolic resin composite material products is poor, and the long-time stable production is difficult.
Secondly, the gum dipping method in the production process of the existing fireproof grating is generally carried out by adopting an open type gum groove, toxic and harmful substances (a little moisture, free phenol and free aldehyde) are easily generated at the contact part of the gum material and the die opening and the heating part of the die, and the toxic and harmful substances are volatilized into the air and permeate into a workshop, thereby causing harm to the atmosphere and the health of workers.
Thirdly, due to the special application environment of the fire-proof grating, the fire-proof grating is generally required to have good performances of ventilation, strength, flame retardance, heat dissipation, explosion resistance, skid resistance, acid and alkali corrosion resistance and the like, and particularly the harsh requirements on the strength and the flame retardance of the fire-proof grating are main limiting factors in the production and application processes of the fire-proof grating. Fireproof grids produced by a plurality of manufacturers cannot meet the requirements due to poor flame retardant property and low strength.
Therefore, it is one of the technical problems to be solved by those skilled in the art to provide a fire-proof grille which can be continuously and stably produced, is safe and environment-friendly, and has good flame retardant property and mechanical strength, and a preparation method thereof.
Disclosure of Invention
In view of the above, the invention aims to provide a fireproof grating and a preparation method thereof, so as to solve the technical problems of poor continuity, no environmental protection, and poor flame retardance and strength performance of the existing fireproof grating production process.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a preparation method of a fireproof grating comprises the following steps
S1, preparation of low-viscosity phenolic resin: putting 70-110 parts of phenolic resin and 5-8 parts of acetone in parts by weight into a stirring kettle, and stirring at 50-55 ℃ for 0.5-1 hour to obtain low-viscosity phenolic resin;
s2, preparation of phenolic resin sizing material: putting 90-100 parts by weight of low-viscosity phenolic resin, 5-15 parts by weight of aluminum hydroxide filler, 7-10 parts by weight of flame retardant, 1-6 parts by weight of urotropine and 1-6 parts by weight of dialdehyde starch into a stirring kettle, and stirring for 0.5-1 hour at 50-55 ℃ to obtain a phenolic resin sizing material;
s3, yarn guide: leading the glass fiber into a glue injection box through a yarn guide device;
s4, dipping: injecting the phenolic resin sizing material into a glue injection box, so that the glass fiber material is impregnated in the phenolic resin sizing material;
s5, pultrusion: and (3) conveying the material in the glue injection box into an extrusion forming device for extrusion, curing and forming, finally pulling out, cooling and cutting to obtain the fireproof grating.
Furthermore, the yarn guide device comprises a plurality of first yarn guide strips capable of moving along the horizontal direction and a plurality of second yarn guide strips capable of moving along the vertical direction, and the first yarn guide strips and the second yarn guide strips are vertically arranged.
Furthermore, the glue injection box is a sealed hollow box body, the glue injection box is provided with glue injection holes, two ends of the glue injection box are respectively provided with an inlet and an outlet, phenolic resin glue materials are injected into the glue injection box through the glue injection holes, and the glass fibers are input or output to the glue injection box through the inlets and the outlets.
The glue injection box comprises an upper template and a lower template, wherein the glue injection holes are formed in the upper template and the lower template, and the upper template and the lower template jointly surround to form a closed glue injection cavity; the inlet and the outlet are respectively communicated with the glue injection cavity.
Furthermore, the peripheries of the glue injection box and the extrusion forming device are provided with a gas collecting device.
Furthermore, the gas collecting device comprises an air outlet device and a gas collecting device, the glue injection box and the extrusion forming device are located between the air outlet device and the gas collecting device, the air outlet device is located at the inlet end of the glue injection box, and the gas collecting device is located at the outlet end of the extrusion forming device.
Furthermore, the air-out device includes power device, gas transmission pipeline and air ducting, power device's air outlet pass through the gas transmission pipeline with air ducting is connected, air ducting is annular groove-shaped structure, and the open end in groove is located and is close to one side of annotating the gluey box.
Furthermore, the gas collection device comprises a gas collection port and an exhaust pipeline, the gas collection port is of a horn-shaped structure, and the cross sectional area of the gas collection port close to one end of the extrusion forming device is larger than the cross sectional area of the gas collection port far away from one end of the extrusion forming device.
A fireproof grating is prepared by the fireproof grating preparation method.
Compared with the prior art, the fireproof grating and the preparation method thereof have the advantages of simple process, environmental protection, good continuity, stable production, high strength and good flame retardant property.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method of making a fire protection grate in accordance with an embodiment of the present invention;
figure 2 is a schematic structural view of a yarn guide device according to an embodiment of the invention;
FIG. 3 is a schematic structural view of a guide rail on an outer frame in the yarn guiding device according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of the glue injection box according to the embodiment of the invention;
fig. 5 is another schematic structural diagram of the glue injection box according to the embodiment of the invention;
fig. 6 is a schematic structural diagram of a glue injection box according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a stirred tank according to an embodiment of the present invention;
FIG. 8 is a schematic sectional view of a stirred tank according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a gas collecting apparatus according to an embodiment of the present invention;
FIG. 10 is a schematic view of a gas collecting apparatus according to another aspect of the present invention;
fig. 11 is a schematic structural view of an air outlet device according to an embodiment of the present invention;
FIG. 12 is a schematic view of a first structure of a grid according to an embodiment of the present invention;
fig. 13 is a second structural diagram of the grid according to the embodiment of the invention;
FIG. 14 is a schematic view of a third structure of the grid according to the embodiment of the present invention;
FIG. 15 is a schematic structural view of a rod-passing connection hole according to an embodiment of the present invention;
FIG. 16 is a schematic view of the structure of a fire protection grate in accordance with an embodiment of the present invention;
fig. 17 is a fourth structural diagram of a grid according to an embodiment of the present invention.
Description of reference numerals:
1-a yarn guide device, 11-a first yarn guide strip, 12-a second yarn guide strip, 13-an outer frame, 131-a first edge, 132-a second edge, 14-a guide rail, 15-a limiting structure, 2-a glue injection box, 21-an upper template, 211-an upper template opening, 22-a lower template, 221-a lower template opening, 23-a glue injection hole, 24-a glue injection cavity, 24' -a glue injection sub-cavity, 25-a fastening bolt, 27-a middle template, 271-a middle template upper opening, 272-a middle template lower opening, 3-a stirring kettle, 31-a kettle body, 32-a first stirring device, 321-a first stirring blade, 322-a first driving shaft, 323-a first driving motor, 33-a second stirring device and 331-a second stirring blade, 332-a second driving shaft, 333-a second driving motor, 334-a water distribution cylinder, 335-a water passing hole, 336-a hollowed-out part, 4-an extrusion forming device, 5-a tractor head, 6-a gas collecting device, 61-an air outlet device, 611-a power device, 612-a gas pipeline, 613-an air guide device, 62-a gas collecting device, 621-a gas collecting port, 622-an exhaust hole, 623-a material output hole, 7-a waste gas treatment device, 8-a grid, 81-a first supporting part, 82-a second supporting part, 83-a connecting part, 84-a buffering part, 85-a reinforcing part, 86-a rod penetrating connecting hole, 861-a main hole, 862-a side hole, 87-a first reinforcing glass fiber bundle and 88-a second reinforcing glass fiber bundle, 89-third reinforcing glass fiber bundle, 9-penetrating rod, 91-penetrating rod body and 92-penetrating rod lug.
Detailed Description
In order to make the technical means, objectives and functions of the present invention easy to understand, embodiments of the present invention will be described in detail with reference to the specific drawings.
It should be noted that all terms used in the present invention for directional and positional indication, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "lateral", "longitudinal", "center", and the like are used only for explaining the relative positional relationship, the connection condition, and the like between the respective members in a certain state, and are only for convenience of describing the present invention, and do not require that the present invention must be constructed and operated in a certain orientation, and thus, should not be construed as limiting the present invention. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Specifically, the invention provides a preparation method of a fireproof grating, which comprises the following steps
S1, preparation of low-viscosity phenolic resin: putting 70-110 parts of phenolic resin and 5-8 parts of acetone in parts by weight into a stirring kettle, and stirring at 50-55 ℃ for 0.5-1 hour to obtain low-viscosity phenolic resin;
s2, preparation of phenolic resin sizing material: putting 90-100 parts by weight of low-viscosity phenolic resin, 5-15 parts by weight of aluminum hydroxide filler, 7-10 parts by weight of flame retardant, 1-6 parts by weight of urotropine and 1-6 parts by weight of dialdehyde starch into a stirring kettle, and stirring for 0.5-1 hour at 50-55 ℃ to obtain a phenolic resin sizing material;
s3, yarn guide: guiding the glass fiber into a glue injection box;
s4, dipping: injecting the phenolic resin sizing material into a glue injection box, so that the glass fiber material is impregnated in the phenolic resin sizing material;
s5, pultrusion: and (3) conveying the material in the glue injection box into an extrusion forming device for extrusion, curing and forming, finally pulling out, cooling and cutting to obtain the fireproof grating.
In step S1, adding a certain amount of acetone into the phenolic resin to reduce the viscosity of the phenolic resin, preferably, the acetone and the phenolic resin are mixed in an amount of 6 to 7 parts by weight: 100, and more preferably, the acetone and the phenolic resin are added according to the weight ratio of 6.5: 100 in proportion. Research shows that when the ratio of acetone to phenolic resin is 6-7: 100, the viscosity of the phenolic resin is low, and when the ratio of acetone to phenolic resin is 6.5: the viscosity number of the phenolic resin is lowest at 100.
Further, research finds that the use of acetone can reduce the viscosity of the phenolic resin and is beneficial to the full infiltration of the glass fibers, but in the later-stage pultrusion forming process, the curing time of the fireproof grating is prolonged from 2-3 hours to about 4 hours, and the improvement of the production efficiency is not facilitated. In order to solve the problem of increased curing time caused by reduced viscosity of the phenolic resin, the applicant researches and discovers that if urotropine and dialdehyde starch are added into a phenolic resin sizing material, the curing time in the pultrusion process of the fireproof grating can be effectively reduced.
Preferably, in step S2, when 1-6 parts of urotropin and 1-6 parts of dialdehyde starch are added into the phenolic resin sizing material, the curing time of the fire-proof grating can be reduced to 2.5 hours from about 4 hours before.
The research finds that: generally, as the amount of urotropin and dialdehyde starch added increases, the curing time of the fire barrier gradually decreases. The greater the amount of urotropin and dialdehyde starch added, the shorter the curing time of the fire barrier, but the poorer the surface quality of the finished product. The applicant has unexpectedly found that: when the ratio of the urotropine to the dialdehyde starch is 1:1, the surface quality of the fireproof grating is good, and the fireproof grating has smooth surface and no defects of burrs, pits and the like. The reason for this is that, at this ratio, when the fire-proof grille is fed into the temperature-controlled forming mold of the extrusion forming device from the glue injection box for curing forming, the phenolic resin has already generated a curing reaction at the stage a, and the phenolic resin forms a linear molecular structure, which is beneficial to maintaining good surface quality of the fire-proof grille. Wherein the A-stage refers to the A-stage of phenolic resin curing in Barkland theory.
Further, the flame retardant is prepared from a halogen-free flame retardant and a synergistic flame retardant according to a ratio of 15-20: 6-10, wherein the halogen-free flame retardant is red phosphorus master batch or micro-capsule red phosphorus prepared from a polyolefin resin matrix, and the synergistic flame retardant is prepared by mixing melamine, magnesium hydroxide, aluminum hydroxide and aluminum oxide according to a ratio of 1:2:1: 2.
The present application is further illustrated by the following specific examples.
Example 1
The preparation method of the fireproof grating comprises the following steps
S1, preparation of low-viscosity phenolic resin: putting 110 parts of phenolic resin and 8 parts of acetone in parts by weight into a stirring kettle, and stirring at 55 ℃ for 1 hour to obtain low-viscosity phenolic resin;
s2, preparation of phenolic resin sizing material: putting 100 parts of low-viscosity phenolic resin, 15 parts of aluminum hydroxide filler, 10 parts of flame retardant, 6 parts of urotropine and 6 parts of dialdehyde starch into a stirring kettle according to parts by weight, and stirring for 1 hour at 55 ℃ to obtain phenolic resin sizing material;
s3, yarn guide: guiding the glass fiber into a glue injection box;
s4, dipping: injecting the phenolic resin sizing material into a glue injection box, so that the glass fiber material is impregnated in the phenolic resin sizing material;
s5, pultrusion: and (3) conveying the material in the glue injection box into an extrusion forming device for extrusion, curing and forming, finally pulling out, cooling and cutting to obtain the fireproof grating.
Example 2
The preparation method of the fireproof grating comprises the following steps
S1, preparation of low-viscosity phenolic resin: putting 70 parts of phenolic resin and 5 parts of acetone into a stirring kettle according to the parts by weight, and stirring for 0.5 hour at 50 ℃ to obtain low-viscosity phenolic resin;
s2, preparation of phenolic resin sizing material: putting 90 parts by weight of low-viscosity phenolic resin, 5 parts by weight of aluminum hydroxide filler, 7 parts by weight of flame retardant, 1 part by weight of urotropine and 1 part by weight of dialdehyde starch into a stirring kettle, and stirring for 0.5 hour at 50 ℃ to obtain phenolic resin sizing material;
s3, yarn guide: guiding the glass fiber into a glue injection box;
s4, dipping: injecting the phenolic resin sizing material into a glue injection box, so that the glass fiber material is impregnated in the phenolic resin sizing material;
s5, pultrusion: and (3) conveying the material in the glue injection box into an extrusion forming device for extrusion, curing and forming, finally pulling out, cooling and cutting to obtain the fireproof grating.
Example 3
The preparation method of the fireproof grating comprises the following steps
S1, preparation of low-viscosity phenolic resin: putting 100 parts of phenolic resin and 6 parts of acetone into a stirring kettle according to the parts by weight, and stirring for 0.7 hour at 53 ℃ to obtain low-viscosity phenolic resin;
s2, preparation of phenolic resin sizing material: putting 100 parts of low-viscosity phenolic resin, 10 parts of aluminum hydroxide filler, 8 parts of flame retardant, 3 parts of urotropine and 3 parts of dialdehyde starch into a stirring kettle according to parts by weight, and stirring for 0.8 hour at 53 ℃ to obtain phenolic resin sizing material;
s3, yarn guide: guiding the glass fiber into a glue injection box;
s4, dipping: injecting the phenolic resin sizing material into a glue injection box, so that the glass fiber material is impregnated in the phenolic resin sizing material;
s5, pultrusion: and (3) conveying the material in the glue injection box into an extrusion forming device for extrusion, curing and forming, finally pulling out, cooling and cutting to obtain the fireproof grating.
Example 4
The invention also provides a yarn guide device 1 for preparing the fire-proof grating, in steps S3 and S4 of the preparation method of the fire-proof grating, the glass fiber is guided into the glue injection box 2 through the yarn guide device 1; as shown in fig. 1 to 3, the yarn guide device 1 includes a plurality of first yarn guide strips 11 capable of moving horizontally and left and right and a plurality of second yarn guide strips 12 capable of moving vertically and up and down, and the first yarn guide strips 11 and the second yarn guide strips 12 are vertically arranged. The position of the yarn guide strip can be adjusted along the horizontal direction or the vertical direction through the yarn guide device 1, and then the position of each strand of glass fiber is adjusted, so that the position of each strand of glass fiber is more accurate, especially, the glass fiber at the edge angle of the fireproof grating can be well filled, and the performance of finished products and the uniformity of the quality of the products are improved.
Furthermore, the yarn guiding device 1 further comprises an outer frame 13, the first yarn guiding strip 11 and the second yarn guiding strip 12 are located in the outer frame 13, the outer frame 13 comprises two first edges 131 arranged along the horizontal direction and two second edges 132 arranged along the vertical direction, and the first edges 131 and the second edges 132 are vertically connected to form a rectangular frame; the inner sides of the first edge 131 and the second edge 132 are provided with guide rails 14, the two end parts of the first yarn guide strip 11 are slidably clamped in the guide rails 14 on the first edge 131, the two end parts of the second yarn guide strip 12 are slidably clamped in the guide rails 14 on the second edge 132, and the guide rails 14 on the first edge 131 and the guide rails 14 on the second edge 132 are not in the same plane, so that the first yarn guide strip 11 and the second yarn guide strip 12 are not in the same plane.
Preferably, the guide rails 14 on the first edge 131 and the second edge 132 are provided with protruding limiting structures 15, the limiting structures 15 can clamp and fix the first yarn guiding strip 11 and the second yarn guiding strip 12 at specific positions so as to adjust and fix the position of the glass fiber, so that the glass fiber can be distributed according to the product design requirement, and more preferably, the limiting structures 15 are semicircular protrusions arranged in the guide rails 14, and the limiting structures 15 are semicircular protrusions, which is beneficial for the end portions of the first yarn guiding strip 11 and the second yarn guiding strip 12 to smoothly pass over the limiting structures 15.
Furthermore, sleeves are arranged on the first yarn guide strip 11 and the second yarn guide strip 12 and can be rotatably wrapped on the peripheries of the first yarn guide strip 11 and the second yarn guide strip 12, and in the yarn guide process, the sleeves can rotate along with the movement of the glass fibers, so that the glass fibers are prevented from being sanded by the yarn guide device 1, and the quality of finished products is prevented from being influenced.
Example 5
The invention also provides a glue injection box 2 for preparing the fireproof grating. Specifically, in steps S3 and S4 of the above fire-proof grille preparation method, glass fiber and phenolic resin sizing materials are respectively introduced into the glue injection box 2, as shown in fig. 4 to 5, the glue injection box 2 is a sealed hollow box body, glue injection holes 23 are formed in the glue injection box 2, the number of the glue injection holes 23 is adjusted according to the size of the glue injection box 2, generally, 3 to 5 glue injection holes 23 are arranged every 100cm along the axial direction of the glue injection box 2. The two ends of the glue injection box 2 are respectively provided with an inlet and an outlet, the phenolic resin glue stock is injected into the glue injection box 2 through the glue injection hole 23, the glass fiber is input into or output from the glue injection box 2 through the inlet and the outlet and is impregnated in the phenolic resin glue stock, and the phenolic resin glue stock with the glass fiber distributed inside and/or on the surface is sent out through the outlet. The airtight cylindrical glue injection box of structure about adopting, on the one hand, can reduce the toxic gas diffusion to the air in, on the other hand, can improve glass fiber impregnation effect.
Further, as shown in fig. 1, the number of the glue injection boxes 2 may be 1 or more, and a plurality of the glue injection boxes 2 are arranged in an up-and-down stacked manner, so that the glass fibers are impregnated and then collected.
Further, as shown in fig. 4 to 6, the glue injection box 2 includes an upper template 21 and a lower template 22, the glue injection holes 23 are disposed on the upper template 21 and the lower template 22, and the upper template 21 and the lower template 22 surround together to form a closed glue injection cavity 24; the inlet and the outlet are respectively communicated with the glue injection cavity 24. The upper template 21 and/or the lower template 22 are provided with a plurality of fastening bolt holes and fastening bolts 25. The upper template 21 and the lower template 22 are connected and fixed with each other through the fastening bolt holes and the fastening bolts 25.
Further, the shape of the glue injection box 2 is rectangular, cylindrical or elliptic cylindrical, and the shape of the glue injection cavity 24 in the glue injection box 2 is rectangular, cylindrical or elliptic cylindrical.
Example 6
In order to further optimize the structure of the glue injection box 2, on the basis of embodiment 5, the structure of the glue injection box 2 is further improved, specifically:
the shape of the glue injection box 2 is rectangular, and the shape of the glue injection cavity 24 is rectangular. The upper template 21 comprises a rectangular upper template top wall and upper template side walls arranged around the edge of the upper template top wall, and the lower template 22 comprises a rectangular lower template top wall and lower template side walls arranged around the edge of the lower template top wall.
Further, an upper template opening 211 is formed in the top wall of the upper template; a lower template opening 221 is formed in the top wall of the lower template; the upper template opening 211 and the lower template opening 221 are positioned to correspond to each other and together form the inlet.
Further, the glue injection holes 23 are distributed along the axial direction of the glue injection cavity 24 from one end of the inlet to one end of the outlet. Preferably, the glue injection holes 23 are located at four top corners of the rectangular glue injection cavity 24. Generally, in order to optimize the infiltration effect of the glass fibers, in the prior art, the glue injection hole is mostly arranged in the center of the glue injection box to shorten the infiltration distance of the phenolic resin in each direction, so that although the infiltration effect of the glass fibers can be improved to a certain extent, the infiltration effect of the glass fibers still does not reach a more ideal state, especially the glass fibers at the corners of the glue injection cavity are very difficult to be infiltrated, so that the sufficient infiltration of the glass fibers at the corners of the fire protection grid and near the outer surface is neglected as a key factor influencing the product quality in the production process of the fire protection grid, and if the glass fibers at the corners of the fire protection grid and near the outer surface are not fully infiltrated, the strength and the surface quality of the fire protection grid can be greatly reduced. According to the invention, firstly, the glue injection box 2 is set to be of a closed structure, and then the glue injection holes 23 are arranged at four top corners of the glue injection cavity 24, so that the short phenolic resin soaks the glass fiber from the corners of the glue injection cavity 24 to the center along opposite directions, and the good soakage of the glass fiber is realized: specifically, when short phenolic resin is injected from the periphery of the glue injection cavity 24, glass fibers located at the corners of the glue injection cavity 24 and the periphery of the glue injection cavity 24 are firstly soaked, then, the phenolic resin is continuously injected into the glue injection cavity 24 from the glue injection holes 23, and the glue injection box 2 is of a closed structure, so that the pressure in the glue injection cavity 24 is gradually increased along with the continuous injection of the phenolic resin, and the phenolic resin in each direction flows to the center of the glue injection cavity 24 under the action of external pressure, so that the glass fibers located in the center of the glue injection cavity 24 can also be fully soaked.
Furthermore, the glue injection box 2 further comprises an intermediate template 27, wherein the intermediate template 27 is arranged between the upper template 21 and the lower template 22, and divides the glue injection cavity 24 into a plurality of glue injection cavities 24'. The upper and lower ends of the middle formwork 27 are respectively provided with a middle formwork upper opening 271 and a middle formwork lower opening 272 for allowing the glass fiber material to pass through. And the upper template 21 and the lower template 22 are provided with glue injection holes 23 communicated with the vertex angles of the glue injection cavities 24'. The glass fibers are respectively input into different glue injection cavities 24' for impregnation, so that the impregnation of the glass fibers is more sufficient.
Example 7
In order to further optimize the structure of the glue injection box 2, on the basis of embodiment 5, the structure of the glue injection box 2 is further improved, specifically:
the shape of the glue injection box 2 is cylindrical, and the shape of the glue injection cavity 24 is cylindrical. The upper template 21 comprises a semi-cylindrical upper template top wall and upper template side walls arranged around the edge of the upper template top wall, and the lower template 22 comprises a semi-cylindrical lower template top wall and lower template side walls arranged around the edge of the lower template top wall.
Further, an upper template opening 211 is formed in the top wall of the upper template; a lower template opening 221 is formed in the top wall of the lower template; the upper template opening 211 and the lower template opening 221 are positioned to correspond to each other and together form the inlet.
Further, glue injection holes 23 are formed in the upper template 21 and the lower template 22, and from the inlet end to the outlet end of the glue injection box 2, the glue injection holes 23 are distributed along the axial direction of the glue injection cavity 24.
Preferably, along the axial direction of the glue injection cavity 24, the glue injection holes 23 are spirally distributed on the side wall of the glue injection cavity 24. The axial spiral distribution of the glue injection holes 23 can inject the phenolic resin glue stock into the glue injection cavity 24 from all directions, thereby being beneficial to the full impregnation of the glass fiber.
Example 8
In order to further optimize the structure of the glue injection box 2, on the basis of embodiment 7, the structure of the glue injection box 2 is further improved, specifically:
from the inlet end to the outlet end of the glue injection box 2, the cross-sectional area of the glue injection cavity 24 is gradually reduced on the cross section perpendicular to the axis of the glue injection box 2. Along with the reduction of the cross-sectional area of the glue injection cavity 24, the pressure in the glue injection cavity 24 is increased, and the pressure is increased, so that the glass fiber is further and fully impregnated.
Further, be equipped with on the lateral wall of injecting glue cavity 24 and press the structure, press the structure and follow the axial of injecting glue cavity 24 is the heliciform and distributes. The pressing structure is arranged on the side wall of the glue injection cavity 24 in a protruding mode, and the pressing structure is connected with the inner surface of the glue injection cavity 24 in a smooth transition mode. Preferably, the pressing structure is a semi-spherical protrusion. Near the area of the pressing structure, the pressure of the phenolic resin is high, so that the phenolic resin can be used for fully impregnating the glass fiber in the central part of the glue injection cavity 24 under the action of the pressing structure.
As some embodiments of this application, be equipped with the blind hole on the lateral wall of injecting glue cavity 24, the blind hole is close to the one end of 2 surfaces of injecting glue box is sealed, the blind hole is close to the one end of injecting glue cavity 24 is opened, be equipped with the spring in the blind hole, the spring quilt press the structure centre gripping to be in the blind hole, press the structure part to hold in the blind hole. Preferably, the pressing structure is a spherical structure, the blind hole is a round blind hole, and the diameter of the sphere of the pressing structure is larger than the radius of the blind hole, so that the pressing structure can be partially accommodated in the blind hole but cannot be completely pressed into the blind hole by the phenolic resin and the glass fiber in the glue injection cavity 24. More preferably, the blind hole is close to the uncovered department of injecting glue cavity 24 sets up the lag, press the structure parcel in the lag, the lag with uncovered department sealing connection of blind hole, the lag is soft material, the volume of lag is greater than press the total volume of structure, make the lag is not right press the motion of structure to produce the restriction. Due to the arrangement of the protective sleeve, phenolic resin can be prevented from entering the blind hole through the connecting gap between the blind hole and the pressing structure. The pressing structure can elastically stretch out and draw back in the blind hole along with the change of the internal pressure of the glue injection cavity 24, and dynamically press the phenolic resin sizing material or the glass fiber in the glue injection cavity 24, so that the phenolic resin sizing material is promoted to fully impregnate the glass fiber.
As some embodiments of the present application, be equipped with on cope match-plate pattern 21 and the lower bolster 22 with the through-hole that the injecting glue cavity 24 is linked together, be equipped with the spring in the through-hole, the spring is close to the one end of injecting glue cavity 24 is equipped with the press structure, press the structure part and hold in the through-hole. Preferably, the through-hole is circular through-hole, press the structure and be ball shape structure, press the ball diameter of structure and be greater than the radius of blind hole, the through-hole is close to the uncovered department of injecting glue cavity 24 sets up the lag, press the structure parcel in the lag, the lag with through-hole sealing connection, the lag is soft materials, the volume of lag is greater than press the total volume of structure, make the lag is not right press the motion of structure and produce the restriction. One end, far away from the glue injection cavity 24, of the spring is connected with an external driving structure, and the pressing structure can elastically stretch out and draw back in the through hole under the action of the external driving structure to dynamically press the phenolic resin sizing material or the glass fiber in the glue injection cavity 24, so that the pressing process of the pressing structure on the material in the glue injection cavity 24 becomes manually controllable.
Example 9
The present application also provides an extrusion forming apparatus 4. Specifically, in step S5 of the above fire-proof grille preparation method, the extrusion molding device 4 is used to perform extrusion and curing molding of the fire-proof grille, and the extrusion molding device 4 is a three-stage temperature control structure.
In the step S5, the temperatures of the three sections of the extrusion molding apparatus 4 are sequentially set to 160 ℃, 180 ℃, and 170 ℃ from the inlet to the outlet of the extrusion molding apparatus 4.
Example 10
The application also provides a stirred tank 3. Specifically, in step S1 and step S2 of the above fire-proof grille preparation method, a stirring tank 3 is adopted for stirring, the stirring tank 3 includes a tank body 31, a first stirring device 32 and a second stirring device 33, a cavity for accommodating materials is provided in the tank body 31, the first stirring device 32 is located at the bottom of the tank body 31, and the second stirring device 33 is located at the top of the tank body 31.
Further, the first stirring device 32 includes a first stirring blade 321, a first driving shaft 322 and a first driving motor 323, the first stirring blade 321 is located inside the bottom of the kettle body 31, the first driving shaft 322 passes through the center of the bottom of the kettle body 31, one end of the first driving shaft 322 is connected to the first stirring blade 321, the other end of the first driving shaft 322 is rotatably connected to the first driving motor 323, and the first stirring blade 321 can be driven by the first driving motor 323 to rotate.
Further, the second stirring device 33 includes a second stirring blade 331, a second driving shaft 332, a second driving motor 333 and a water diversion drum 334, the second stirring blade 331 is located inside the top of the kettle body 31, the second driving shaft 332 passes through the top center of the kettle body 31, one end of the second driving shaft 332 is connected with the second stirring blade 331, the other end of the second driving shaft 332 is connected with the second driving motor 333, and the second driving shaft 332 can reciprocate up and down under the driving of the second driving motor 333. The water diversion cylinder 334 is a cylindrical cylinder body covered on the periphery of the second stirring blade 331, a water through hole 335 is formed in the side wall of the water diversion cylinder 334, and the second stirring blade 331 can be driven by the second driving shaft 332 to reciprocate up and down in the water diversion cylinder 334. Preferably, the second stirring blade 331 has a disc-shaped structure.
On one hand, the stirring kettle 3 can enable the materials in the stirring kettle 3 to rotate, flow and mix along the horizontal direction through the first stirring device 32; on the other hand, the materials in the stirring tank 3 can be vertically flowed and mixed by the up-and-down reciprocating motion of the second stirring blade 331. Through the flow of the materials in the horizontal direction and the vertical direction, the components, the temperature, the density and the like of the materials in the stirring kettle 3 can quickly reach the state of high consistency, and the time required by uniform mixing of the materials is further shortened.
Specifically, when the second stirring blade 331 moves downward, the material located below the second stirring blade 331 is subjected to the pressure of the second stirring blade 331, and will flow outward from the inside of the water diversion cylinder 334, while a negative pressure will be generated above the second stirring blade 331, and under the action of the negative pressure, the upper liquid material located outside the water diversion cylinder 334 will flow into the water diversion cylinder 334; when the second stirring blade 331 moves upward, the liquid material located above the second stirring blade 331 is subjected to the thrust action of the second stirring blade 331, and flows outward from the inside of the water diversion cylinder 334, a negative pressure is generated below the second stirring blade 331, and under the action of the negative pressure, the liquid material located at the lower part outside the water diversion cylinder 334 flows into the water diversion cylinder 334, so that a water flow in the vertical direction is formed in the stirring kettle 3, particularly at the center.
Further, the outside of the cauldron body 31 is equipped with the heat preservation, the heat preservation with be equipped with heating structure between the cauldron body 31, through heating structure can be right the material in the cauldron body 31 heats.
Example 11
In order to further optimize the structure of the stirred tank 3, the structure of the stirred tank 3 was further optimized on the basis of example 10.
Specifically, in the using process, the power output required by the second stirring blade 331 is too large, and particularly, the current is extremely large when the equipment is started and is 7-10 times as high as the rated current, so that hidden troubles are generated in the safe operation of a line. In order to solve this problem, a partial region of the second stirring blade 331 is hollowed out, and a hollowed-out portion 336 is provided in the second stirring blade 331. Due to the arrangement of the hollow part 336, on one hand, water flow in the vertical direction can be formed in the water distribution cylinder 334 at the same time, and the stirring effect of the stirring kettle 3 is further improved; on the other hand, the resistance and the loss of the driving device in the up-and-down movement of the second stirring blade 331 can be reduced, and the power consumption can be reduced. At the same time, a soft start of the second stirring device 33 is achieved.
Preferably, the area of the hollow portion 336 of the second stirring blade 331 accounts for 20% to 50% of the total area of the second stirring blade 331.
As some embodiments of the present application, the second stirring blade 331 is rotatably connected to the second driving shaft 332 by a bearing or the like. When the second stirring blade 331 reciprocates up and down under the action of the second driving shaft 332, the second stirring blade 331 can spontaneously and simultaneously rotate under the action of the liquid material, so that on one hand, a horizontal water flow can be formed in the water diversion cylinder 334 at the same time, and the stirring effect of the stirring kettle 3 is further improved; on the other hand, the resistance and the loss of the driving device in the up-and-down movement of the second stirring blade 331 can be reduced, and the power consumption can be reduced. At the same time, a soft start of the second stirring device 33 is achieved.
Example 12
The present application also provides a gas collection device 6. Specifically, in step S5 of the above fire-proof grille manufacturing method, the gas collection device 6 is used to collect toxic and harmful substances generated in the pultrusion process, as shown in fig. 9 to 11, the gas collection device 6 is disposed on the periphery of the glue injection box 2, the toxic and harmful substances generated in the dipping and pultrusion processes can be collected into the exhaust gas treatment device 7 through the gas collection device 6, and the toxic and harmful substances are treated through the exhaust gas treatment device 7. The gas collecting device 6 comprises an air outlet device 61 and a gas collecting device 62, the glue injection box 2 and the extrusion forming device 4 are located between the air outlet device 61 and the gas collecting device 62, the air outlet device 61 is located at the inlet end of the glue injection box 2, and the gas collecting device 62 is located at the outlet end of the extrusion forming device 4.
Further, the air outlet device 61 includes a power device 611, an air pipe 612 and an air guide device 613, and the power device 611 is a turbo fan. The air outlet of the power device 611 is connected to the air guiding device 613 through the air pipe 612. The air guide device 613 is an annular structure, the central area of the annular structure is hollow, an annular groove is formed in the annular structure, and the opening end of the groove is located on one side close to the glue injection box 2. The inner diameter of the annular structure of the air guide device 613 is larger than the maximum outer diameter of the glue injection box 2 and the extrusion forming device 4.
Further, the gas collecting device 62 includes gas collecting port 621 and exhaust pipe, the gas collecting port 621 is the horn structure, the gas collecting port 621 is close to the cross-sectional area of extrusion device 4 one end is greater than and keeps away from the cross-sectional area of extrusion device 4 one end, the gas collecting port 621 is close to the internal diameter of extrusion device 4 one end is greater than the biggest external diameter of notes gluey box 2 and extrusion device 4. One end of the air collecting port 621, which is far away from the extrusion forming device 4, is provided with an exhaust hole 622 and a material output hole 623, the exhaust hole 622 is connected with the exhaust gas treatment device 7 through the exhaust pipeline, and the material output hole 623 is used for pulling out materials output from the extrusion forming device 4, such as a fire-proof grating, through a tractor head 5.
Specifically, in the production process of the fire-proof grating, the power device 611 supplies air into the air guide device 613, after the air flow enters the air guide device 613, the air flow is discharged from the notch of the air guide device 613 under the action of the annular groove-shaped structure of the air guide device 613, that is, an annular air flow is formed on the peripheries of the glue injection box 2 and the extrusion forming device 4 through the air guide device 613, and the flow direction of the annular air flow is from the inlet end of the glue injection box 2 to the outlet end of the extrusion forming device 4. While the annular air flow flows along the peripheries of the glue injection box 2 and the extrusion molding device 4, the annular air flow can drive the air flow in the hollow area in the center of the air guide device 613 to flow in the same direction, and can drive the air flow on the periphery of the air guide device 613 to flow in the same direction, so that an accelerated air flow which is about 15 times of the output air volume of the power device 611 can be formed on the peripheries of the glue injection box 2 and the extrusion molding device 4. Under the action of the accelerated airflow, the air around the glue injection box 2 and the extrusion molding device 4 will flow to the air collecting device 62 in a directional manner, so that the toxic and harmful substances discharged from the glue injection box 2 and the extrusion molding device 4 also move to the air collecting device 62 in a directional manner, finally flow into the air collecting port 621, and then flow into the exhaust gas treatment device 7 through the exhaust hole 622 and the exhaust pipeline on the air collecting port 621, and the toxic and harmful substances are treated by the exhaust gas treatment device 7. In conclusion, it can be easily found that the toxic and harmful substances discharged from the glue injection box 2 and the extrusion molding device 4 are collected by the gas collecting device 6, so that the device has the advantages of energy conservation and high efficiency, and the gas collecting device 6 is simple in structure and convenient to popularize and apply.
Example 13
The application also provides a fireproof grating which is prepared by adopting the fireproof grating preparation method. The fire prevention grid includes bars 8 and poling 9, the cross section of bars 8 is I-shaped, bars 8 include first supporting part 81, second supporting part 82 and connecting portion 83, first supporting part 81 and second supporting part 82 parallel arrangement, connecting portion 83 sets up perpendicularly between first supporting part 81 and the second supporting part 82.
Further, as shown in fig. 12, when in use, the second supporting portion 82 is located at a lower side of the fire protection grate, that is, the fire protection grate is supported on a bottom surface or an installation bracket of the fire protection grate through the second supporting portion 82, and the first supporting portion 81 is located at an upper side of the fire protection grate, that is, the first supporting portion 81 is a tread surface for pedestrians to walk on. Preferably, the first supporting portion 81 is a plane structure, the second supporting portion 82 is a curved structure with a certain radian, and the second supporting portion 82 is curved to a side close to the first supporting portion 81. Through with the second supporting part 82 sets up to being close to the curved surface of one side hunch of first supporting part 81, on the one hand, is in as pedestrian or walking when the fire prevention grid is last, the second supporting part 82 can play the effect of damping for the pedestrian walks more comfortablely, and on the other hand, the curved surface can bear bigger gravity, does benefit to the improvement of fire prevention grid bearing strength.
Furthermore, the second supporting portion 82 is provided with a buffering portion 84 on the surface of one side away from the first supporting portion 81, the buffering portion 84 is a recessed portion arranged along the axial direction of the fire-proof grille, and the arrangement of the buffering portion 84 can further improve the bearing capacity and the vibration damping capacity of the second supporting portion 82.
Further, as shown in fig. 13, a reinforcing portion 85 is disposed on the connecting portion 83, the reinforcing portion 85 is a protrusion disposed on two sides of the connecting portion 83 along the axial direction of the fire protection grate, when the fire protection grate is used, the connecting portion 83 is easily damaged due to its small thickness, small stress area and large pressure, and the strength of the connecting portion 83 can be improved due to the disposition of the reinforcing portion 85.
Preferably, the reinforcing part 85 is located in the middle of the two side surfaces of the connecting part 83, and the reinforcing part 85 is smoothly transitionally connected with the two sides of the connecting part 83.
Example 14
To further increase the strength of the fire protection grate, the structure of the fire protection grate was further optimized on the basis of example 13.
Specifically, as shown in fig. 14 to 15, the grid bars 8 are provided with rod penetrating connection holes 86, the rod penetrating connection holes 86 are used for the rod penetrating 9 to penetrate through so as to connect the plurality of grid bars 8, and the rod penetrating connection holes 86 are through holes formed in the connection portion 83. Preferably, the rod-through connecting hole 86 penetrates through the reinforcing part 85 and the connecting part 83, the rod-through connecting hole 86 comprises a main hole 861 and side holes 862, the side holes 862 are through holes located at two sides of the main hole 861, and the side holes 862 are communicated with the main hole 861. The radius of the side hole 862 is smaller than that of the main hole 861.
Correspondingly, as shown in fig. 16, the penetrating rod 9 includes a penetrating rod main body 91 and penetrating rod lugs 92 located at two sides of the penetrating rod main body 91, the penetrating rod main body 91 is of a cylindrical structure, and the penetrating rod lugs 92 are located at a semi-cylindrical structure where the penetrating rod main bodies 91 intersect. The radius of the feed-through body 91 is equal to the radius of the main hole 861, and the radius of the feed-through lug 92 is equal to the radius of the side hole 862. When the penetrating rod 9 is inserted into the penetrating rod connecting hole 86, the penetrating rod lug 92 and the side hole 862 are connected to each other, so that the penetrating rod lug 92 and the reinforcing part 85 are engaged with each other, the reinforcing effect of the reinforcing part 85 on the connecting part 83 can be greatly improved, and meanwhile, the binding force between the grid 8 and the penetrating rod 9 is larger, and the binding is tighter.
Example 14
To further increase the strength of the fire protection grate, the structure of the fire protection grate was further optimized on the basis of example 13.
Further, as shown in fig. 17, by analyzing the stress of the fire-proof grille, on the cross section of the grille 8, the joint of the first supporting portion 81 and the connecting portion 83, the joint of the second supporting portion 82 and the connecting portion 83, and the connecting portion 83 are the portions of the fire-proof grille with smaller strength but larger stress, so that the above positions are reinforced. Specifically, a third reinforcing glass fiber bundle 89 is provided at the joint between the first support part 81 and the connection part 83, a second reinforcing glass fiber bundle 88 is provided at the joint between the second support part 82 and the connection part 83, a first reinforcing glass fiber bundle 87 is provided inside the connection part 83, and the third reinforcing glass fiber bundle 89, the second reinforcing glass fiber bundle 88 and the first reinforcing glass fiber bundle 87 are high-strength glass fiber bundles. The positions of the third reinforcing glass fiber bundles 89, the second reinforcing glass fiber bundles 88 and the first reinforcing glass fiber bundles 87 are accurately positioned by the yarn guide device 1.
Comparative example 1
The fire-protection grid a shown in fig. 12 is prepared by the method for preparing the fire-protection grid described in example 3;
in step 1, a fire-proof grating b shown in fig. 12 was prepared according to the method for preparing a fire-proof grating described in example 3, except that acetone was not added;
in step 2, 2 parts of urotropine and 4 parts of dialdehyde starch are added according to the proportion of 1:2, and besides, the fire-proof grille c shown in fig. 12 is prepared according to the preparation method of the fire-proof grille described in the embodiment 3;
in step 2, 4 parts of urotropine and 2 parts of dialdehyde starch are added according to the ratio of 2:1, and besides, the fire-proof grille d shown in fig. 12 is prepared according to the preparation method of the fire-proof grille described in the embodiment 3;
preparing a fire-proof grid e according to the structure of a phenolic resin pultrusion fire-proof grid produced by Fibergate company by adopting the preparation method of the fire-proof grid in the embodiment 3;
the fire-barrier grate f shown in fig. 16 was prepared by the method for preparing the fire-barrier grate described in example 3.
The fire-proof grating a, the fire-proof grating b, the fire-proof grating c, the fire-proof grating d, the fire-proof grating e and the fire-proof grating f are respectively subjected to bending strength, compression strength and combustion grade detection, and the detection results are shown in the following table 1:
wherein, the bending strength is tested according to the bending performance test method of the fiber reinforced plastics (GB 1449-; the compressive strength is tested according to a test method for the compressive performance of the fiber reinforced plastics (GB 1448-.
TABLE 1 Performance test results for fire protection grilles
In table 1, comparing fire-proof grating a and fire-proof grating b, it can be seen that the addition of acetone is beneficial to improving the bending strength of the fire-proof grating; comparing the fire-proof grating a with the fire-proof gratings c and d, it can be seen that under the condition that the total adding amount of the urotropine and the dialdehyde starch is not changed, when the ratio of the urotropine to the dialdehyde starch is 1:1, the bending strength and the compression strength of the fire-proof grating can be improved; comparing the fire-proof grating a with the fire-proof grating e, it can be seen that the bending strength and the compression strength of the fire-proof grating can be improved by improving the structure of the fire-proof grating; comparing the fire-proof grating a and the fire-proof grating f, it can be seen that the bending strength and the compression strength of the fire-proof grating can be greatly improved by further improving the structure of the fire-proof grating, such as the optimization of the structure of the through rod connecting holes 86 and the through rods 9. All fire-proof grids all have A2 grade combustion rating, and fire behaviour is excellent.
Comparative example 2
While the fire-proof grating is prepared by the method for preparing the fire-proof grating in embodiment 3, the gas collecting device 6 is adopted to collect toxic and harmful substances on the periphery of the glue injection box 2 and the extrusion forming device 4. Firstly, the gas collection device 6 is closed, after the fireproof grating is continuously prepared for 4 hours, the content of toxic and harmful substances on the peripheries of the glue injection box 2 and the extrusion forming device 4 is measured, and the measuring points comprise: the measuring point 1-the entrance of the glue injection box 2, the measuring point 2-the 10cm away from the outer surface of the middle part of the glue injection box 2, the measuring point 3-the exit of the glue injection box 2, the measuring point 4-the entrance of the extrusion forming device 4, the measuring point 5-the 10cm away from the outer surface of the middle part of the extrusion forming device 4, the measuring point 6-the exit of the extrusion forming device 4, and the measuring point 7-outdoor (blank group). And then starting the gas collecting device 6, continuously preparing the fireproof grating for 4 hours, and measuring the content of toxic and harmful substances on the peripheries of the glue injection box 2 and the extrusion forming device 4, wherein the measuring points are the same as the above.
The detection of the toxic and harmful substances comprises content detection of free phenol and free aldehyde in the air at a measuring point, the content detection of the free phenol and the free aldehyde is carried out by adopting a gas chromatography, and the detection results are shown in the following table 2:
TABLE 2 detection results of the content of free phenol and free aldehyde
The content of free phenol and free aldehyde in the air near the glue injection box 2 and the extrusion forming device 4 can be reduced through the gas collecting device 6, so that the content of free phenol and free aldehyde in the air near the glue injection box 2 and the extrusion forming device 4 can be kept in a safe range, and the air at the periphery of the glue injection box 2 and the extrusion forming device 4 can be effectively purified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The preparation method of the fireproof grating is characterized by comprising the following steps
S1, preparation of low-viscosity phenolic resin: putting 70-110 parts of phenolic resin and 5-8 parts of acetone in parts by weight into a stirring kettle, and stirring at 50-55 ℃ for 0.5-1 hour to obtain low-viscosity phenolic resin;
s2, preparation of phenolic resin sizing material: putting 90-100 parts by weight of low-viscosity phenolic resin, 5-15 parts by weight of aluminum hydroxide filler, 7-10 parts by weight of flame retardant, 1-6 parts by weight of urotropine and 1-6 parts by weight of dialdehyde starch into a stirring kettle, and stirring for 0.5-1 hour at 50-55 ℃ to obtain a phenolic resin sizing material;
s3, yarn guide: leading the glass fiber into a glue injection box through a yarn guide device (1);
s4, dipping: injecting the phenolic resin sizing material into a glue injection box (2) so that the glass fiber material is impregnated in the phenolic resin sizing material;
s5, pultrusion: and (3) conveying the material in the glue injection box into an extrusion forming device (4) for extrusion, curing and forming, finally pulling out, cooling and cutting to obtain the fireproof grating.
2. A method for the production of a fire protection grate according to claim 1, characterized in that the yarn guiding means (1) comprises a plurality of first yarn guiding strips (11) movable in a horizontal direction and a plurality of second yarn guiding strips (12) movable in a vertical direction, the first yarn guiding strips (11) and the second yarn guiding strips (12) being arranged vertically.
3. The method for preparing the fire-proof grid according to claim 1, wherein the glue injection box (2) is a sealed hollow box body, the glue injection box (2) is provided with a glue injection hole (23), the two ends of the glue injection box (2) are respectively provided with an inlet and an outlet, the phenolic resin glue is injected into the glue injection box (2) through the glue injection hole (23), and the glass fiber is input into or output from the glue injection box (2) through the inlet and the outlet.
4. The method for preparing the fire-proof grid according to claim 3, wherein the glue injection box (2) comprises an upper template (21) and a lower template (22), the glue injection holes (23) are arranged on the upper template (21) and the lower template (22), and the upper template (21) and the lower template (22) jointly surround to form a closed glue injection cavity (24); the inlet and the outlet are respectively communicated with the glue injection cavity (24).
5. A method for the production of a fire protection grate according to claim 1, characterized in that the glue injection boxes (2) and the extrusion forming devices (4) are provided with gas collecting means (6) at their periphery.
6. A method for producing a fire protection grate according to claim 5, characterized in that the gas collecting device (6) comprises an air outlet device (61) and an air collecting device (62), the glue injection box (2) and the extrusion forming device (4) are located between the air outlet device (61) and the air collecting device (62), the air outlet device (61) is located at the inlet end of the glue injection box (2), and the air collecting device (62) is located at the outlet end of the extrusion forming device (4).
7. The method for preparing the fire protection grid according to claim 6, wherein the air outlet device (61) comprises a power device (611), an air conveying pipeline (612) and an air guiding device (613), an air outlet of the power device (611) is connected with the air guiding device (613) through the air conveying pipeline (612), the air guiding device (613) is in an annular groove-shaped structure, and an open end of the groove is located at one side close to the glue injection box (2).
8. A method for producing a fire protection grate according to claim 6, characterized in that the gas collecting device (62) comprises a gas collecting opening (621) and a gas exhaust line, the gas collecting opening (621) is of a trumpet-shaped structure, and the cross-sectional area of the end of the gas collecting opening (621) close to the extrusion forming device (4) is larger than the cross-sectional area of the end far away from the extrusion forming device (4).
9. A fire-proof grating, characterized in that the fire-proof grating is prepared by the method for preparing the fire-proof grating according to the claims 1-8.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104890262A (en) * | 2015-05-29 | 2015-09-09 | 南通澳兰德复合材料有限公司 | Method for manufacturing corrosion-resistant and flame-retardant glass steel grid through pultrusion profile production system |
| CN105109070A (en) * | 2015-08-24 | 2015-12-02 | 西安永兴科技发展有限公司 | Manufacturing device and manufacturing method for environmental-protection phenolic composite metro evacuation platform |
| CN105255101A (en) * | 2015-10-16 | 2016-01-20 | 航天材料及工艺研究所 | Impact-resistant and fireproof glass fiber reinforced phenolic aldehyde board and preparation method thereof |
| CN106750060A (en) * | 2016-12-15 | 2017-05-31 | 西南林业大学 | A kind of biomass accelerate phenolic resin curing and preparation method of phenolic resin |
| CN109501322A (en) * | 2017-09-14 | 2019-03-22 | 洛阳双瑞橡塑科技有限公司 | A kind of fiber reinforcement composite sleeper and preparation method thereof |
-
2019
- 2019-04-01 CN CN201910258556.3A patent/CN110591282A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104890262A (en) * | 2015-05-29 | 2015-09-09 | 南通澳兰德复合材料有限公司 | Method for manufacturing corrosion-resistant and flame-retardant glass steel grid through pultrusion profile production system |
| CN105109070A (en) * | 2015-08-24 | 2015-12-02 | 西安永兴科技发展有限公司 | Manufacturing device and manufacturing method for environmental-protection phenolic composite metro evacuation platform |
| CN105255101A (en) * | 2015-10-16 | 2016-01-20 | 航天材料及工艺研究所 | Impact-resistant and fireproof glass fiber reinforced phenolic aldehyde board and preparation method thereof |
| CN106750060A (en) * | 2016-12-15 | 2017-05-31 | 西南林业大学 | A kind of biomass accelerate phenolic resin curing and preparation method of phenolic resin |
| CN109501322A (en) * | 2017-09-14 | 2019-03-22 | 洛阳双瑞橡塑科技有限公司 | A kind of fiber reinforcement composite sleeper and preparation method thereof |
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