CN109437788B - Non-combustible composite expanded polystyrene insulation board and pressing method thereof - Google Patents
Non-combustible composite expanded polystyrene insulation board and pressing method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention relates to the field of building materials, and provides a non-combustible composite expanded polystyrene insulation board and a pressing method thereof. The pressing method of the non-combustible composite expanded polystyrene insulation board comprises the steps of uniformly mixing the raw materials, and performing mould pressing for at least three times to form a plate. The clearance between particles is reduced through multiple times of mould pressing, air is less, better negative pressure can be formed between the sucker and a finished product, and automatic production is facilitated. The prepared non-combustible composite expanded polystyrene insulation board has the advantages of good compression resistance, bending resistance and tensile property, good fireproof property and low heat conductivity coefficient, and better negative pressure can be formed between the sucking disc and a finished product, thereby being beneficial to automatic production.
Description
Technical Field
The invention relates to the field of building materials, in particular to a non-combustible composite expanded polystyrene insulation board and a pressing method thereof.
Background
The polystyrene heat-insulating board is a foam heat-insulating board taking polystyrene resin as a raw material. The composite board is mainly used for building walls, roof insulation, composite board insulation, refrigeration houses, air conditioners, vehicles and ships, floor heating, decoration carving and the like, and has wide application. Polystyrene insulation boards in the prior art are formed into block-shaped blanks through one-step compression molding. The blanks were placed in stacks at room temperature. When stacking, the blanks are separated by a parting strip for ventilation. After the blank is solidified, the blank has certain strength. However, the polystyrene heat-insulating board suction cup in the prior art cannot form good negative pressure with a finished product, only manual sorting can be performed, the suction cup cannot suck the cut board, and automation cannot be achieved.
Disclosure of Invention
The invention aims to provide a pressing method of a non-combustible composite expanded polystyrene insulation board, which has small gaps among particles and less air, and can form better negative pressure between a sucker and a finished product, thereby being beneficial to automatic production.
Another objective of the present invention is to provide a non-combustible composite expanded polystyrene thermal insulation board, which has good compression, bending and tensile properties, better fire resistance, and lower thermal conductivity, and a better negative pressure can be formed between the suction cup and the finished product, thereby facilitating automatic production.
The embodiment of the invention is realized by the following steps:
a pressing method for a non-combustible composite expanded polystyrene insulation board comprises the steps of uniformly mixing raw materials, and performing mould pressing for at least three times to form a plate shape.
The non-combustible composite expanded polystyrene insulation board is formed by pressing by adopting the pressing method of the non-combustible composite expanded polystyrene insulation board.
The embodiment of the invention has the following beneficial effects:
the pressing method of the non-combustible composite expanded polystyrene insulation board provided by the embodiment repeatedly extrudes gaps and air between particles of the raw material through multiple times of die pressing, so that the structure of the raw material is better and compact, the sucking disc can form better negative pressure with a finished product, and then the cut board is adsorbed, and automatic transportation or processing is realized. Meanwhile, the control is matched with specific interval time, and the pressing effect is further improved. In the first mould pressing process, the pressing amount is large, the interval time is short, and the rapid pressing and forming are facilitated, while in the subsequent second mould pressing process, the pressing amount is small, the interval time is properly prolonged, the transverse and longitudinal release amount of air can be improved, a large amount of air of the non-combustible composite expanded polystyrene heat-insulating board is discharged, the pores are small, the internal crystal water is less, the water absorption rate is reduced, and the heat-insulating effect is good. Meanwhile, in the curing process, no parting strip is needed during stacking, deformation caused by uneven pressure distribution is avoided, and the problem of ventilation is solved only by turning the blank in the middle time. In addition, the non-combustible composite expanded polystyrene insulation board provided in the embodiment has the advantages of good compression resistance, bending resistance and tensile property, better fireproof property and lower heat conductivity coefficient, and better negative pressure can be formed between the sucking disc and a finished product, so that the automatic production is facilitated.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The following describes a non-combustible composite expanded polystyrene insulation board and a pressing method thereof according to an embodiment of the present invention.
The embodiment provides a pressing method of a non-combustible composite expanded polystyrene insulation board, which comprises the steps of uniformly mixing raw materials, and carrying out mould pressing for at least three times to form a plate shape.
The raw materials in this embodiment may be raw materials of conventional styrene insulation boards, and may also be raw materials specific to this embodiment. Specifically, in this embodiment, the raw materials include a modified polystyrene material, first cement, and pretreated cement slurry, and the mass ratio of the modified polystyrene material, the first cement, and the pretreated cement slurry is 30 to 35: 19-21: 238-270.
The modified polystyrene material is prepared by mixing the following raw materials: 11-13 parts of polystyrene foam particles and 19-22 parts of emulsion type interface agent; wherein the solid content of the emulsion type interface agent is 18-21%. The pretreated cement slurry comprises, by weight, 150 parts of second cement 110-16 parts, 14-16 parts of coal ash, 4-6 parts of dispersible rubber powder and 95-105 parts of water.
Polystyrene foam particles are a light weight high molecular weight polymer. Polystyrene resin is added with foaming agent, and simultaneously heated for softening to generate gas, so that the foamed plastic with a hard closed-cell structure is formed. In this embodiment, the emulsion type interface agent is added thereto, and the solid content of the emulsion type interface agent is controlled, so that the polystyrene foam particles are modified to form the modified polystyrene material, and the modified polystyrene material is fully modified to have better performance.
The inventor discovers that when the polystyrene heat-insulating plate is subjected to compression molding in long-term work, the later-stage curing time is long, and when the polystyrene heat-insulating plate is cured, the parting strips are required to be adopted for separation, so that the ventilation in the curing process is uneven, the surface of a blank is denatured, and a plurality of leftover materials are added.
The inventor changes the cement in the original formula into a first cement and a second cement, wherein the first cement comprises 90-100% of special cement and 0-10% of ordinary cement by mass percent, and the second cement comprises 20-40% of special cement and 60-80% of ordinary cement by mass percent; the curing performance of the raw materials is enhanced by forming two kinds of cement with different proportions.
Wherein, the first cement has high content of special cement and low content of ordinary cement. The second cement has high content of ordinary cement and low content of special cement. When the raw materials of the non-combustible composite expanded polystyrene insulation board are mixed, the modified polystyrene material and the first cement are uniformly mixed, and then the modified polystyrene material and the pre-treated cement slurry are mixed. The pretreated cement paste is coated on the outer side of the mixture of the polystyrene material and the first cement, so that a structure with high content of outside common cement and low content of inside common cement is formed. In this embodiment, adopt high-content special cement as the inlayer, the very big limit shortened the curing time to can inlayer special cement content high, the ingenious design that outer ordinary cement content is high can guarantee that inside and outside curing time is comparatively homogeneous, not only can shorten curing time, promote production efficiency, can also promote the performance of incombustible type composite expanded polystyrene heated board simultaneously.
In this embodiment, the special cement includes one or more of aluminate cement, sulphoaluminate cement, and fluoroaluminate cement. The cement has high hardening speed and can release heat, and the curing speed can be further enhanced by the heat release in the inner layer with high special cement content.
Preferably, the first cement comprises 95-100% of special cement and 0-5% of ordinary cement by mass percent, and the second cement comprises 20-30% of special cement and 70-80% of ordinary cement by mass percent.
The raw materials are uniformly mixed, specifically, the modified polystyrene material and the first cement are uniformly mixed, then the mixture is uniformly mixed with the pretreated cement slurry, and then the uniformly mixed raw materials are molded in a mold.
In this embodiment, through mould pressing many times, extrude clearance and air between the granule of raw materials repeatedly for the better compactness of structure of raw materials, the sucking disc can form better negative pressure with the finished product, and then adsorbs the panel after the cutting, realizes automatic transportation or processing.
Specifically, in the present embodiment, the interval between any two adjacent press molds is 1 to 4 seconds in the intermittent press molding. The intermittent mould pressing can ensure that the moulded raw material has certain air release time, which is beneficial to ensuring the uniform distribution of the air in the raw material.
The at least three times of die pressing comprises that the first die pressing with the pressing amount of 80-120mm is pressed downwards and then retracted for at least one time, the second die pressing with the pressing amount of 30-70mm is continued to be pressed downwards and then retracted for at least two times to perform intermittent die pressing, and the plate is formed. In the embodiment, the pressing amount is controlled, so that the pressing degree of each time is controlled, when the raw material is initially pressed, the raw material is easy to press due to more air, and the air is discharged in the subsequent pressing process and is not easy to press.
The interval time between any two adjacent first embossing is 1-2s, and the interval time between any two adjacent second embossing is 3-4 s. Meanwhile, the control is matched with specific interval time, and the pressing effect is further improved. In the first mould pressing process, the pressing amount is large, the interval time is short, and the rapid pressing and forming are facilitated, while in the subsequent second mould pressing process, the pressing amount is small, the interval time is properly prolonged, the transverse and longitudinal release amount of air can be improved, and the uniformity of gas distribution in the plate is further improved.
Specifically, the number of times of die pressing is five, the initial thickness of the non-combustible composite expanded polystyrene insulation board is 890-910mm, the thickness is sequentially changed into 790-810mm, 740-760mm, 690-710mm, 640-660mm and 600-610mm through five times of die pressing, and then the self-locking device for limiting 620mm is used for locking in a reverse mode to achieve 620 mm. Preferably, the die pressing times are five times, the initial thickness of the non-combustible composite expanded polystyrene insulation board is 900mm, the thicknesses of the non-combustible composite expanded polystyrene insulation board are sequentially changed into 800mm, 750mm, 700mm, 650mm and 600mm through five die pressing, and then the non-combustible composite expanded polystyrene insulation board is reversely locked to 620mm by using a self-locking device with a limiting position of 620 mm. In this embodiment, the thickness of the non-combustible composite expanded polystyrene insulation board after the pressing is controlled, so that the air removal effect in the non-combustible composite expanded polystyrene insulation board can be ensured to the maximum extent. Wherein, when the last pressing is performed, the pressing is required to be performed to be less than 620mm, and if the former pressing amount is smaller, the pressing amount from the last pressing to be less than 620mm may not be within the range of 30-70 mm.
In this embodiment, the preset value of the self-locking device is 620mm, when the pressing amount is over 620mm, the self-locking is not started, and when the final pressing thickness is pressed to be less than 620mm and about 610mm, the self-locking is started, and the self-locking device self-locks four edges of the top surface of the plate, so that the final thickness of the plate can be effectively controlled.
The non-combustible composite expanded polystyrene insulation board is prepared by the pressing process of multiple times of die pressing, air of the non-combustible composite expanded polystyrene insulation board is discharged in a large quantity, pores are small, internal crystal water is less, water absorption is reduced, and the insulation effect is good. Meanwhile, in the curing process, no parting strip is needed during stacking, deformation caused by uneven pressure distribution is avoided, and the problem of ventilation is solved only by turning the blank in the middle time.
Stacking the plate-shaped blanks, curing and cutting, crushing leftover materials generated by cutting to form saw powder, and adding the saw powder into the raw materials, wherein the mass ratio of the saw powder to the raw materials is 1.1-1.3: 1. The saw powder is obtained by crushing leftover materials formed by cutting the plate after die pressing, and in the embodiment, the saw powder is used as the filler, so that the problem of waste is solved. So that the whole production line does not discharge solid waste, and the environmental cost of enterprises is greatly reduced.
In addition, the embodiment provides a non-combustible composite expanded polystyrene insulation board, which is obtained by pressing the non-combustible composite expanded polystyrene insulation board by the pressing method, and the non-combustible composite expanded polystyrene insulation board has the advantages of good compression resistance, bending resistance and tensile strength, good fireproof performance and low heat conductivity coefficient, and can form good negative pressure between a sucker and a finished product, thereby being beneficial to automatic production.
The non-combustible composite expanded polystyrene insulation board and the pressing method thereof are further explained by combining with the embodiment.
Example 1
The embodiment provides a pressing method of a non-combustible composite expanded polystyrene insulation board, which comprises the following steps:
the modified polystyrene cement mortar comprises 32kg of modified polystyrene material, 20kg of first cement and 265kg of pre-treated cement paste, wherein the modified polystyrene material is obtained by mixing the following raw materials: 12 parts of polystyrene foam particles and 20 parts of emulsion type interface agent; the emulsion-type interface agent has a solid content of 20%. The first cement comprises 100 percent of special cement by mass percent; the pretreated cement slurry comprises 130 parts by weight of second cement, 15 parts by weight of saw powder, 15 parts by weight of coal ash, 5 parts by weight of dispersible rubber powder and 100 parts by weight of water; wherein the second cement comprises 25% of special cement and 75% of ordinary cement in percentage by mass.
The modified polystyrene material is mixed with the first cement, then mixed with the pretreated cement slurry, uniformly mixed and placed in a mould pressing device, the initial thickness of the raw material is 900mm, and then the raw material is subjected to mould pressing forming for five times, and the thicknesses of the raw material are sequentially changed into 800mm, 750mm, 700mm, 650mm and 600 mm. The interval time is 1s, 2s, 3s and 4s in sequence. And then, reversely locking by using a self-locking device for limiting 620mm, reversely locking to 620mm, standing for 12h, demoulding, stacking and placing the plate-shaped blank without a parting slip during stacking, and cutting after curing to form the non-combustible composite expanded polystyrene insulation board.
Examples 2 to 5
Embodiments 2 to 5 provide a pressing method of a non-combustible composite expanded polystyrene insulation board, which has the same components as those of embodiment 1 except that:
in example 2, the starting thickness of the raw material was 890mm by the three-time die pressing, and the thicknesses were 770mm, 700mm and 610mm in this order by the three-time die pressing. The interval time is 1s and 3s in sequence, then the locking is carried out by using a self-locking device for limiting 620mm, the locking is carried out to 620mm, and the demoulding is carried out after the standing is carried out for 16 h.
In example 3, the initial thickness of the raw material was 910mm by four times of molding, and the thicknesses were changed to 790mm, 720mm, 670mm and 600mm by three times of molding in this order. The interval time is 2s, 3s and 3s in sequence, then the locking is carried out by using a self-locking device for limiting 620mm, the locking is carried out to 620mm, and the demoulding is carried out after the standing for 14 h.
In example 4, the starting thickness of the raw material was 900mm by five times of molding, and the thicknesses were 810mm, 760mm, 710mm, 660mm and 610mm in this order by five times of molding. The interval time is 1s, 2s, 3s and 4s in sequence, then the locking is performed by a self-locking device with the limitation of 620mm, the locking is performed to 620mm, and the demoulding is performed after the standing is performed for 12 h.
In example 5, the starting thickness of the raw material was 900mm by five times of molding, and the thicknesses were changed to 790mm, 740mm, 690mm, 640mm and 605mm in this order by five times of molding. The interval time is 1s, 2s, 3s and 4s in sequence, then the locking is performed by a self-locking device with the limitation of 620mm, the locking is performed to 620mm, and the demoulding is performed after the standing is performed for 12 h.
Examples 6 to 7
The pressing method of the non-combustible composite expanded polystyrene insulation board provided by the embodiment 6-7 is the same as that of the embodiment 1, and the difference is that: the components are different;
in example 6, the conventional polystyrene insulation board in the prior art comprises the following components: 260Kg of ordinary Portland cement, 15Kg of heavy calcium powder, 20Kg of coal ash, 1Kg of early strength agent, 10Kg of redispersible rubber powder, 25Kg of polystyrene foam particles and 210Kg of water.
In example 7, saw dust was added to the composition of example 1 in an amount of 1.2 times the mass of the starting material.
In example 8, the raw materials include a first raw material (saw dust) and a second raw material, the mass ratio of the first raw material to the second raw material is 1.1:1, and the second raw material includes a modified polystyrene material 31kg, a first cement 20kg and a pretreated cement slurry 240kg, wherein the modified polystyrene material is obtained by mixing the following raw materials: 13 parts of polystyrene foam particles and 20 parts of emulsion type interface agent; the emulsion-type interface agent has a solid content of 20%. The first cement comprises 96% of special cement and 4% of ordinary cement in percentage by mass; the pretreated cement slurry comprises 120 parts of second cement, 14.5 parts of coal ash, 4.5 parts of dispersible rubber powder and 101 parts of water in parts by weight; wherein the second cement comprises 30% of special cement and 70% of ordinary cement by mass percent.
In example 9, the raw materials include a first raw material (saw dust) and a second raw material, the mass ratio of the first raw material to the second raw material is 1.3:1, the second raw material includes a modified polystyrene material 34kg, a first cement 20.5kg and a pretreated cement slurry 258kg, wherein the modified polystyrene material is obtained by mixing the following raw materials: 12 parts of polystyrene foam particles and 21 parts of emulsion type interface agent; the emulsion-type interface agent had a solid content of 19%. The first cement comprises 98% of special cement and 2% of ordinary cement in percentage by mass; the pretreated cement slurry comprises 140 parts of second cement, 15 parts of coal ash, 5 parts of dispersible rubber powder and 98 parts of water in parts by weight; wherein the second cement comprises 35% of special cement and 65% of ordinary cement by mass percent.
Comparative example 1
Changing the mould pressing times in the embodiment 1 into 1 time, directly pressing the raw material with the initial thickness of 900mm to 600mm at one time, then reversely locking to 620mm by utilizing a self-locking device with the limiting function of 620mm, standing for 12h, and then demoulding.
Comparative example 2
The interval time in the compression molding process in example 1 was replaced with 8 s.
Comparative example 3
The components of the prior art conventional polystyrene insulation board of example 6 were subjected to a conventional one-time press-fit, from 900mm directly to 600mm, and then back-locked to 620 mm.
Experimental example 1
Sampling the non-combustible composite expanded polystyrene insulation board obtained in the embodiment 1, and sending the sampled insulation board to a quality detection center of construction engineering in Sichuan province for detection, wherein the detection items and the detection results are as follows:
(1) the method comprises the following steps of (1) detecting the dry density, the compressive strength and the heat conductivity coefficient of a sample of the non-combustible composite expanded polystyrene insulation board, wherein the detection result is as follows:
(2) the method comprises the following steps of detecting the combustion performance grade of a non-combustible composite expanded polystyrene insulation board sample, wherein the detection result is as follows:
(3) the performance of the external wall external thermal insulation system of the non-combustible composite expanded polystyrene thermal insulation board sample is detected, and the detection result is as follows:
(4) the weather resistance of the non-combustible composite expanded polystyrene insulation board sample is tested, and the detection result is as follows:
wherein, the specific detection results for the tensile viscosity strength test of the table are as follows: and 11, 29 days in 2018, 11 months, and testing the tensile bonding strength of the system test piece after the weather resistance test by using a Laba tester. The average value of the tensile bonding strength of the plastering layer and the heat-insulating layer tested at this time is 0.10MPa (the fracture is cut to the surface of the heat-insulating layer), the damaged part is on the heat-insulating layer, and the test result is as follows:
experimental example 2
The performances of the non-combustible composite expanded polystyrene insulation boards obtained in the examples 1 to 9 and the comparative examples 1 to 3 are detected, and the detection standard refers to the above, and the detection results are as follows:
as can be seen from the above table, the comprehensive performance of the embodiments 1 to 5 and 7 to 9 is significantly better than that of the comparative examples 1 to 2, wherein the thermal conductivity coefficient of the embodiment 6 is too high, and is already over 0.065W/(mk), because the embodiment 6 uses the components of the conventional polystyrene insulation board in the prior art, the thermal conductivity coefficient is poor, and the insulation performance is poor, and the thermal conductivity coefficient is increased and the compressive strength is reduced by three times of mold pressing compared with five times of mold pressing of the embodiment 1 in the embodiment 2, so the mold pressing times have a greater influence on the performance of the product. In addition, the comparative example 1 adopts one-time die pressing, and has small compressive strength, less than 0.1 tensile strength and poor effect. In comparative example 2, the time per molding was increased, which resulted in cement solidification, difficulty in molding, and finally poor product performance. In the comparative example 3, the multi-time pressing of the example 6 is changed into the one-time pressing, so that the heat conductivity coefficient and the water absorption capacity are obviously increased, the heat conductivity coefficient of the example 6 does not reach the standard, which is based on the raw materials, and the effect of the example 6 is better than that of the comparative example 3.
In summary, the pressing method for the non-combustible composite expanded polystyrene insulation board provided by the embodiment repeatedly extrudes gaps and air between particles of the raw material through multiple times of die pressing, so that the structure of the raw material is better and compact, the suction disc and a finished product can form better negative pressure, and then the cut board is adsorbed, and automatic transportation or processing is realized. Meanwhile, the control is matched with specific interval time, and the pressing effect is further improved. In the first mould pressing process, the pressing amount is large, the interval time is short, and the rapid pressing and forming are facilitated, while in the subsequent second mould pressing process, the pressing amount is small, the interval time is properly prolonged, the transverse and longitudinal release amount of air can be improved, a large amount of air of the non-combustible composite expanded polystyrene heat-insulating board is discharged, the pores are small, the internal crystal water is less, the water absorption rate is reduced, and the heat-insulating effect is good. Meanwhile, in the curing process, no parting strip is needed during stacking, deformation caused by uneven pressure distribution is avoided, and the problem of ventilation is solved only by turning the blank in the middle time. In addition, the non-combustible composite expanded polystyrene insulation board provided in the embodiment has the advantages of good compression resistance, bending resistance and tensile property, better fireproof property and lower heat conductivity coefficient, and better negative pressure can be formed between the sucking disc and a finished product, so that the automatic production is facilitated.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (4)
1. A pressing method of a non-combustible composite expanded polystyrene insulation board is characterized by comprising the steps of uniformly mixing raw materials, and performing mould pressing for at least three times to form a plate shape;
the raw materials comprise, by mass, 30-35: 19-21: 238-270, the pretreatment cement slurry comprises, by weight, 110-150 parts of second cement, 14-16 parts of coal ash, 4-6 parts of dispersible rubber powder and 95-105 parts of water, and when the raw materials are mixed, the modified polystyrene material is mixed with the first cement and then is mixed with the pretreatment cement slurry;
the first cement comprises 90-100% of special cement and 0-10% of ordinary cement by mass percent, and the second cement comprises 20-40% of special cement and 60-80% of ordinary cement by mass percent; the special cement comprises one or more of aluminate cement, sulphoaluminate cement and fluoroaluminate cement;
the mould pressing times are five times, the initial thickness of the non-combustible composite expanded polystyrene insulation board is 890-910mm, the thickness is sequentially changed into 790-810mm, 740-760mm, 690-710mm, 640-660mm and 600-610mm through five mould pressing, and then the non-combustible composite expanded polystyrene insulation board is reversely locked to 620mm by using a self-locking device with the limiting position of 620 mm; the interval time of the five times of the die pressing is 1s, 2s, 3s and 4s in sequence.
2. The pressing method of the incombustible composite expanded polystyrene heat-insulating board according to claim 1, wherein the number of the press-molding is five, the initial thickness of the incombustible composite expanded polystyrene heat-insulating board is 900mm, the thickness is sequentially changed to 800mm, 750mm, 700mm, 650mm and 600mm through the five press-molding, and then the incombustible composite expanded polystyrene heat-insulating board is reversely locked to 620mm by using a self-locking device for limiting 620 mm.
3. The pressing method of the incombustible composite expanded polystyrene heat-insulating board according to claim 1, wherein the plate-shaped blanks are stacked, cured and cut, scraps produced by cutting are crushed to form saw powder, and the saw powder is added to the raw material, wherein the mass ratio of the saw powder to the raw material is 1.1-1.3: 1.
4. A non-combustible composite expanded polystyrene insulation board, which is characterized by being formed by pressing according to the pressing method of the non-combustible composite expanded polystyrene insulation board of any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811653224.7A CN109437788B (en) | 2018-12-29 | 2018-12-29 | Non-combustible composite expanded polystyrene insulation board and pressing method thereof |
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| AUPP970099A0 (en) * | 1999-04-09 | 1999-05-06 | James Hardie International Finance B.V. | Concrete formulation |
| CN1181955C (en) * | 2002-12-31 | 2004-12-29 | 北京太空板业股份有限公司 | Foamed cement composite slab and its production method |
| CN101328047B (en) * | 2008-07-29 | 2013-03-13 | 中国建筑材料科学研究总院 | Adhesive polystyrene granule insulating mortar for exterior wall external insulation and preparation thereof |
| CN102952288B (en) * | 2012-11-09 | 2014-09-10 | 大连申达建筑保温材料有限公司 | Preparation method of secondary medium-temperature soaking highly difficult burning molding polystyrene insulation board |
| CN105884393B (en) * | 2016-04-19 | 2018-05-25 | 天贺控股有限公司 | A kind of energy-conserving thermal insulation board of high fire-retardance and preparation method thereof |
| CN106007588A (en) * | 2016-05-17 | 2016-10-12 | 孟祥闻 | Heat preservation integrated wallboard material and heat preservation wallboard manufacturing method |
| CN108752772A (en) * | 2018-05-25 | 2018-11-06 | 成都固迪建材有限公司 | Modified polystyrene material and preparation method thereof and thermoset foam material and preparation method thereof and thermosetting composite polyphenylene plate |
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Effective date of registration: 20220608 Address after: 610400 No.2 Xingchuan Road, Chengdu ABA Industrial Development Zone, huaikou Town, Jintang County, Chengdu City, Sichuan Province Patentee after: Chengdu goody new building materials Co.,Ltd. Address before: 610000 Haowang Road, East District, Chengdu cross strait science and Technology Development Park, Wenjiang District, Chengdu City, Sichuan Province Patentee before: CHENGDU GUDI BUILDING MATERIALS Co.,Ltd. |