A heat-insulating and fireproof door core material for security doors and a preparation method thereof

Abstract

The present application relates to the field of door core material preparation, and particularly relates to a heat-insulating and fireproof door core material for security doors and a preparation method thereof, comprising a protective layer, a heat-insulating layer and a core part, wherein the core part comprises a plurality of springs arranged at equal intervals and fixed plates arranged at both ends of the springs; the heat-insulating layer is arranged outside the fixed plates; and the protective layer is bonded to the outside of the heat-insulating layer and is a foamed aluminum plate, which is prepared as follows: S1, cutting the fixed plates and then welding spring fixing bases and fixing buckles; S2, arranging and fixing the springs; S3, weighing the component materials of the heat-insulating layer, adding water and mixing uniformly; S4, based on a core material preparation system, sequentially completing pouring, jarring, smoothing and heat-insulating drying of the two heat-insulating layers after setting; S5, preliminarily determining whether the preparation of the heat-insulating layer meets preset standards according to the measured compressive strength; and S6, bonding the protective layer. On the basis of ensuring the performance of the core material, the present application can also be applied to the door core of security doors with different thicknesses.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of door core material preparation, in particular to a heat-insulating and fireproof door core material for security doors and a preparation method thereof. BACKGROUND

[0002] The filling material of the door core board is the core material of the security door, and its quality and performance are particularly important. The filling material of the door core board traditionally uses rock wool, aluminum silicate cotton, mineral wool, perlite board, foamed magnesium oxychloride cement board, and foamed cement board.

[0003] The aluminum silicate cotton board, rock wool, slag wool, or glass wool fireproof door board has high energy consumption in the production process, produces pollution in the production process and use process, and is difficult to meet environmental protection requirements. The perlite security door core board has good fire resistance, and the board is formed using a strong alkaline adhesive such as water glass, which is corrosive and has poor strength and toughness, and is easily damaged when slicing is required.

[0004] Therefore, how to prepare a material that meets the standards of fireproof and heat-insulating performance and can be applied to security doors of various types and different thicknesses without slicing is an urgent problem to be solved. SUMMARY

[0005] Therefore, the present application provides a heat-insulating and fireproof door core material for security doors and a preparation method thereof to overcome the problems of the prior art, i.e., the security door core board is easily damaged during use, and the preparation process lacks necessary detection, resulting in unstable product performance.

[0006] In one aspect, the present application provides a heat-insulating and fireproof door core material for security doors, which is a composite material including a protective layer, a heat-insulating layer, and a core portion, wherein

[0007] The core portion includes a plurality of springs arranged at equal intervals, and fixed plates arranged at both ends of the springs, the inner side of the fixed plate being used to fix the spring, and the outer side of the fixed plate being provided with a heat-insulating layer fixing buckle;

[0008] The heat-insulating layer is arranged on the outer side of the fixed plate through the heat-insulating layer fixing buckle, and the material of the heat-insulating layer is composed of expanded perlite, bentonite, magnesium sulfate, calcium hydroxide, boron oxide, and plant fiber;

[0009] The protective layer is adhered to the outer side of the heat-insulating layer through fireproof glue, and the protective layer is a foamed aluminum plate with uniformly distributed air holes on the inner surface;

[0010] Further, the weight ratio of the material of the heat-insulating layer is as follows: expanded perlite 25-32 parts, bentonite 15-30 parts, magnesium sulfate 0.5-2 parts, calcium hydroxide 3-6 parts, boron oxide 1-1.5 parts, and plant fiber 1.5-2 parts.

[0011] Further, the composite material further comprises a pre-adhesion layer, which is arranged outside the protective layer.

[0012] In another aspect, the application also provides a preparation method of a heat-insulating fireproof door core material for security doors, comprising:

[0013] Step S1, cutting a fixed plate, welding a spring fixing base on the inner side of the fixed plate, and welding the fixed buckle on the outer side of the fixed plate;

[0014] Step S2, arranging and fixing the connecting spring based on the spring fixing base;

[0015] Step S3, weighing the component materials of the heat-insulating layer according to the weight ratio, and then mixing them with water uniformly;

[0016] Step S4, completing the pouring, tamping, leveling, and setting of the two heat-insulating layers in sequence based on a core material preparation system, and then heat-insulating drying to complete the preparation of the heat-insulating layer;

[0017] Step S5, detecting the compressive strength of the heat-insulating layer, and preliminarily determining whether the preparation of the heat-insulating layer meets the preset standard according to the detected compressive strength, and when the preparation does not meet the preset standard, determining the reason for not meeting the preset standard based on the density of the heat-insulating layer, or increasing the drying time for the preparation of the next batch of heat-insulating layer;

[0018] Step S6, bonding the protective layer and the pre-adhesion layer on the outer side of the heat-insulating layer that meets the preset standard to complete the preparation of the heat-insulating fireproof door core material.

[0019] Further, in the step S5, when the preparation of the heat-insulating layer preliminarily meets the preset standard according to the compressive strength, the preparation of the heat-insulating layer is secondarily determined based on the thermal conductivity whether it meets the preset standard.

[0020] Further, when the preparation of the heat-insulating layer secondarily does not meet the preset standard based on the thermal conductivity, the drying temperature for the preparation of the next batch of heat-insulating layer is increased according to the difference between the thermal conductivity and the preset thermal conductivity threshold.

[0021] Further, the increase range of the drying temperature for the preparation of the heat-insulating layer is positively correlated with the thermal conductivity difference, and the thermal conductivity difference is the difference between the thermal conductivity and the preset thermal conductivity threshold.

[0022] Further, in the step S5, the process of preliminarily determining that the preparation of the heat-insulating layer does not meet the preset standard comprises,

[0023] comparing the compressive strength with a first preset compressive strength threshold and a second preset compressive strength threshold, respectively,

[0024] If the compressive strength is less than the first preset compressive strength threshold, determining the reason for not meeting the preset standard based on the density of the thermal insulation layer;

[0025] If the compressive strength is greater than or equal to the first preset compressive strength threshold and less than the second preset compressive strength threshold, increasing the drying time of the thermal insulation layer prepared for the next batch.

[0026] Further, the reason for not meeting the preset standard based on the density of the thermal insulation layer includes that the tamping of the thermal insulation layer does not meet the standard and the tamping time for the next batch of the thermal insulation layer is increased, or the combination of the fixing buckle and the thermal insulation layer does not meet the standard and the layout density of the fixing buckle on the fixing plate for the next batch is increased.

[0027] Further, the layout spacing and spring parameters of the spring are determined based on the design thickness of the core of the security door, and the spring parameters include the free height and compression ratio of the spring.

[0028] Compared with the prior art, the core of the present application is provided in the form of a spring and a fixing plate, and the thermal insulation layer and the protective layer are arranged outside the core. The design of the composite material in a compressible form ensures that the door core material can be used for security doors of different thicknesses.

[0029] Further, the preparation method of the present application detects the compressive strength of the thermal insulation layer and preliminarily determines whether the preparation of the thermal insulation layer meets the preset standard according to the measured compressive strength, and adjusts the preparation process accordingly when it does not meet the preset standard, thereby ensuring the stability of the door core material preparation.

[0030] Further, when it is preliminarily determined that the preparation of the thermal insulation layer meets the preset standard, the preparation of the thermal insulation layer is secondarily determined based on the thermal conductivity whether it meets the preset standard. Thus, the thermal insulation performance of the door core material is more accurately ensured.

[0031] Further, the present application adjusts and corrects the drying temperature of the thermal insulation layer preparation, thereby obtaining a thermal insulation layer with performance meeting the standard.

[0032] Further, the present application determines the reason for not meeting the preset standard by detecting the density of the thermal insulation layer, thereby adjusting the tamping time and the layout density of the fixing buckle accordingly, thereby adjusting the production process of the next batch of material accordingly, thereby ensuring the stability of the material preparation.

[0033] Further, the present application further comprises a pre-adhesion layer arranged outside the protective layer, so that the door core material and the door plate can be quickly assembled when producing the security door. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 Structure diagram of the heat-preservation and fireproof door core material for security doors according to an embodiment of the present application;

[0035] Figure 2 Flow chart of the preparation method of the heat-preservation and fireproof door core material for security doors according to an embodiment of the present application;

[0036] Figure 3 Structure diagram of the core material preparation system according to an embodiment of the present application;

[0037] Figure 4 Flow chart of the preliminary determination of whether the preparation of the heat-preservation layer meets the preset standard according to an embodiment of the present application;

[0038] Figure 5 Fixed plate cross-section diagram according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the objects and advantages of the present application clearer, the present application will be further described below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0040] It should be noted that the data in the present embodiment are obtained by comprehensive analysis and evaluation of historical detection data and corresponding historical detection results of the past three months before the present production by the process determination unit of the present application. Those skilled in the art can understand that the determination method of the present application for a single parameter can be to select the value with the highest proportion as the preset standard parameter according to data distribution, to use weighted summation to obtain the value as the preset standard parameter, to substitute each historical data into a specific formula and to obtain the value by the formula as the preset standard parameter, or other selection methods, as long as the present application can clearly define different specific situations in the single determination process by the obtained value.

[0041] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not used to limit the protection scope of the present application.

[0042] Please refer to Figures 1 to 5 respectively, which are a structure diagram of the heat-preservation and fireproof door core material for security doors according to an embodiment of the present application, a flow chart of the preparation method of the heat-preservation and fireproof door core material for security doors according to an embodiment of the present application, a structure diagram of the core material preparation system according to an embodiment of the present application, a flow chart of the preliminary determination of whether the preparation of the heat-preservation layer meets the preset standard according to an embodiment of the present application, and a fixed plate cross-section diagram according to an embodiment of the present application.

[0043] On the one hand, please refer to Figure 1 and Figure 5The application discloses a heat-preservation fireproof door core material for a security door,

[0044] The door core material is a composite material, comprising a protective layer 1, a heat-preservation layer 2 and a core part 3.

[0045] The core part comprises a plurality of equidistantly arranged springs 31 and fixing plates 32 arranged at both ends of the springs, the inner side of the fixing plate is used for fixing the spring, and the outer side of the fixing plate is provided with a heat-preservation layer fixing buckle 321; the inner side of the fixing plate is fixed with a spring fixing base 322.

[0046] The heat-preservation layer 2 is arranged outside the fixing plate 32 through the heat-preservation layer fixing buckle 321, and the material of the heat-preservation layer is composed of expanded perlite, bentonite, magnesium sulfate, calcium hydroxide, boron oxide and plant fibers.

[0047] The protective layer 1 is adhered to the outer side of the heat-preservation layer through fireproof adhesive, and the protective layer is a foamed aluminum plate with uniformly distributed air holes on the inner surface.

[0048] Specifically, the composite material further comprises a pre-adhesion layer 4 arranged outside the protective layer 1.

[0049] On the other hand, referring to Figure 2 The application discloses a preparation method of a heat-preservation fireproof door core material.

[0050] Step S1, cutting the fixing plate, welding the spring fixing base on the inner side of the fixing plate and welding the fixing buckle on the outer side of the fixing plate;

[0051] Step S2, arranging and fixing the connecting spring based on the spring fixing base;

[0052] Step S3, weighing the heat-preservation layer component materials according to the weight ratio, and then mixing the materials uniformly after adding water;

[0053] Step S4, completing pouring, jolting, leveling and shaping of the heat-preservation layer on both sides based on a core material preparation system, and then performing heat-preservation drying to complete preparation of the heat-preservation layer;

[0054] Step S5, detecting the compressive strength of the heat-preservation layer, preliminarily determining whether the preparation of the heat-preservation layer meets the preset standard according to the detected compressive strength, and when the preset standard is not met, determining the reason for not meeting the preset standard based on the density of the heat-preservation layer, or increasing the time length of heat-preservation drying for preparation of the next batch of heat-preservation layer;

[0055] Step S6, adhering the protective layer and the pre-adhesion layer to the outer side of the heat-preservation layer meeting the preset standard to complete preparation of the heat-preservation fireproof door core material.

[0056] Please refer toFigure 3 Specifically, the core material preparation system comprises a pouring unit for pouring the thermal insulation layer material, a vibrating unit arranged at the output end of the pouring unit for vibrating the poured thermal insulation layer, a drying unit arranged at the output end of the vibrating unit for drying and shaping the thermal insulation layer, a detection unit connected with the drying unit for detecting the parameters of the thermal insulation layer, and a process determination unit connected with the pouring unit, the vibrating unit, the drying unit and the detection unit respectively for adjusting the operation parameters of the system when the preparation of the thermal insulation layer is determined to be inconsistent with the preset standard according to the detected parameters of the thermal insulation layer. The pouring unit comprises a feeding port and a pouring mold, and the parameters of the thermal insulation layer include compressive strength, thermal conductivity and density.

[0057] Specifically, in the step S5, it is preliminarily determined whether the preparation of the thermal insulation layer is consistent with the preset standard according to the compressive strength, wherein,

[0058] If the compressive strength is less than the first preset compressive strength threshold, it is preliminarily determined that the preparation of the thermal insulation layer is inconsistent with the preset standard, and the reason for the inconsistency is determined based on the density of the thermal insulation layer, and the first preset compressive strength threshold is set to 0.32 MPa.

[0059] If the compressive strength is greater than or equal to the first preset compressive strength threshold and less than the second preset compressive strength threshold, it is preliminarily determined that the preparation of the thermal insulation layer is inconsistent with the preset standard, and the drying time of the thermal insulation layer for the next batch is increased, and the second preset compressive strength threshold is set to 0.40 MPa.

[0060] If the compressive strength is greater than or equal to the second preset compressive strength threshold, it is preliminarily determined that the preparation of the thermal insulation layer is consistent with the preset standard, and it is secondarily determined whether the preparation of the thermal insulation layer is consistent with the preset standard based on the thermal conductivity.

[0061] Specifically, the process of secondarily determining that the preparation of the thermal insulation layer is inconsistent with the preset standard based on the thermal conductivity is,

[0062] The thermal conductivity is compared with a preset thermal conductivity threshold, and the preset thermal conductivity threshold is set to 0.106 W / m·K.

[0063] If the thermal conductivity is greater than the preset thermal conductivity threshold, the drying temperature of the drying unit for the next batch of the preparation of the thermal insulation layer is increased according to the difference between the thermal conductivity and the preset thermal conductivity threshold.

[0064] Specifically, the increase amplitude of the drying temperature of the drying unit for the preparation of the next batch of the thermal insulation layer is positively correlated with a thermal conductivity difference value, the thermal conductivity difference value being a difference value between the thermal conductivity and a preset thermal conductivity threshold value, that is, the greater the thermal conductivity difference value, the greater the increase amplitude of the drying temperature.

[0065] Specifically, under a first preset condition, a difference value between a preset modulus of rupture threshold value and the modulus of rupture of the thermal insulation layer is calculated and recorded as a correction difference value, and a correction manner for the increase amplitude of the drying temperature is determined based on the correction difference value, wherein,

[0066] The first correction manner is to correct the increase amplitude of the drying temperature by multiplication using a first preset correction coefficient 0.997; the first correction manner satisfies that the correction difference value is less than a first preset correction difference value 0.02 MPa;

[0067] The second correction manner is to correct the increase amplitude of the drying temperature by multiplication using a second preset correction coefficient 0.992; the second correction manner satisfies that the correction difference value is greater than or equal to the first preset correction difference value and less than a second preset correction difference value 0.05 MPa;

[0068] The third correction manner is to correct the increase amplitude of the drying temperature by multiplication using a third preset correction coefficient 0.986; the third correction manner satisfies that the correction difference value is greater than or equal to the second preset correction difference value;

[0069] The first preset condition is that the drying unit completes the increase of the drying temperature and the modulus of rupture of the prepared thermal insulation layer is lower than a preset modulus of rupture threshold value, and the preset modulus of rupture threshold value is set to 0.25 MPa.

[0070] Specifically, the reason for not meeting the preset standard is determined based on the density of the thermal insulation layer, wherein,

[0071] The first reason determination is that the compaction of the thermal insulation layer is substandard and the compaction time of the vibration unit for the preparation of the next batch of the thermal insulation layer is increased; the first reason determination satisfies that the density of the thermal insulation layer is less than a preset density, and the preset density is set to 265 kg / m 3 ;

[0072] The second reason determination is that the combination of the fixing buckle and the thermal insulation layer is substandard and the arrangement density of the fixing buckle on the fixing plate for the next batch is increased; the second reason determination satisfies that the density of the thermal insulation layer is greater than or equal to the preset density.

[0073] Specifically, the heat preservation layer material is compounded according to the weight ratio of 25-32 parts of expanded perlite, 15-30 parts of bentonite, 0.5-2 parts of magnesium sulfate, 3-6 parts of calcium hydroxide, 1-1.5 parts of boron oxide and 1.5-2 parts of plant fiber. For example, 28 parts of expanded perlite, 30 parts of bentonite, 1.5 parts of magnesium sulfate, 3.2 parts of calcium hydroxide, 1.2 parts of boron oxide and 1.8 parts of plant fiber.

[0074] Specifically, the arrangement interval of the spring and the spring parameters are determined based on the design thickness of the inner core of the security door, the spring parameters including the free height of the spring and the compression ratio, the compression ratio being the ratio of the compressed height of the spring to the free height of the spring. For example, the design thickness of the inner core of the security door is 5 cm, the thickness of the protective layer on both sides of the core is 0.5 cm and the thickness of the heat preservation layer is 1 cm, so the core size reserved is 2 cm, the thickness of the fixed plate is 0.2 cm, the initial arrangement interval of the spring is 20 cm and the compressed height of the spring is 1.6 cm, so the free height of the spring is 2 cm and the compression ratio is 80%.

[0075] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

[0076] The above description is only the preferred embodiments of the present application and is not used to limit the present application; for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A preparation method of a heat-insulating fireproof door core material for a security door, characterized in that, the door core material is a composite material comprising a protective layer, a heat-insulating layer and a core part, wherein, the core part comprises a plurality of springs arranged at equal intervals, and fixing plates arranged at both ends of the springs, the inner side of the fixing plates being used to fix the springs, and the outer side of the fixing plates being provided with heat-insulating layer fixing buckles; the heat-insulating layer is arranged on the outer side of the fixing plates through the heat-insulating layer fixing buckles, and the material of the heat-insulating layer is composed of expanded perlite, bentonite, magnesium sulfate, calcium hydroxide, boron oxide and plant fiber; the protective layer is adhered to the outer side of the heat-insulating layer through fireproof adhesive, and the protective layer is a foamed aluminum plate with uniformly distributed air holes on the inner surface; the weight ratio of the materials of the heat-insulating layer is: expanded perlite 25-32 parts, bentonite 15-30 parts, magnesium sulfate 0.5-2 parts, calcium hydroxide 3-6 parts, boron oxide 1-1.5 parts, and plant fiber 1.5-2 parts; the composite material further comprises a pre-adhesion layer arranged on the outer side of the protective layer; the preparation of the door core material comprises the following steps: Step S1, cutting the fixing plates, welding the spring fixing bases on the inner side of the fixing plates and welding the fixing buckles on the outer side of the fixing plates; Step S2, arranging and fixing the springs based on the spring fixing bases; Step S3, weighing the materials of the heat-insulating layer according to the weight ratio, and then mixing them uniformly with water; Step S4, completing the preparation of the heat-insulating layer by sequentially pouring, vibrating, leveling and heat-insulating drying of the heat-insulating layer on both sides based on a core material preparation system; Step S5, detecting the compressive strength of the heat-insulating layer, and preliminarily determining whether the preparation of the heat-insulating layer meets the preset standard according to the detected compressive strength, and if not, determining the reason for not meeting the preset standard based on the density of the heat-insulating layer, or increasing the drying time for the preparation of the next batch of heat-insulating layer; Step S6, adhering the protective layer and the pre-adhesion layer to the outer side of the heat-insulating layer that meets the preset standard to complete the preparation of the heat-insulating fireproof door core material.

2. The method for preparing the heat-insulating and fireproof door core material for security doors according to claim 1, characterized in that, In the step S5, when it is preliminarily determined that the preparation of the heat-insulating layer meets the preset standard according to the compressive strength, it is further determined whether the preparation of the heat-insulating layer meets the preset standard based on the thermal conductivity.

3. The method for preparing the heat-insulating and fireproof door core material for security doors according to claim 2, characterized in that, When it is further determined that the preparation of the heat-insulating layer does not meet the preset standard based on the thermal conductivity, the drying temperature for the preparation of the next batch of heat-insulating layer is increased according to the difference between the thermal conductivity and the preset thermal conductivity threshold.

4. The method of claim 3, wherein the fireproof door core material for security doors is prepared by mixing 100 parts by weight of the fireproof door core material for security doors of claim 1 with 0.1 to 10 parts by weight of a foaming agent. The increase in the drying temperature for the preparation of the heat-insulating layer is positively correlated with the difference in thermal conductivity, which is the difference between the thermal conductivity and the preset thermal conductivity threshold.

5. The method of claim 4, wherein the fireproof door core material for security doors is prepared by mixing 100 parts by weight of the fireproof door core material for security doors of claim 1 with 0.1 to 10 parts by weight of a foaming agent. In the step S5, the process of preliminarily determining that the preparation of the heat-insulating layer does not meet the preset standard comprises, comparing the compressive strength with a first preset compressive strength threshold and a second preset compressive strength threshold, respectively, if the compressive strength is less than the first preset compressive strength threshold, determining the reason for not meeting the preset standard based on the density of the heat-insulating layer, or If the compressive strength is greater than or equal to the first preset compressive strength threshold and less than the second preset compressive strength threshold, the length of the heat preservation drying prepared for the next batch of the heat preservation layer is increased.

6. The method of claim 5, wherein the fireproof door core material for security doors is prepared by mixing 100 parts by weight of the fireproof door core material for security doors of claim 1 with 0.1 to 10 parts by weight of a foaming agent. The reason for determining that the density of the heat preservation layer does not meet the preset standard includes that the tamping of the heat preservation layer does not meet the standard, and the length of tamping prepared for the next batch of the heat preservation layer is increased, or the combination of the fixing buckle and the heat preservation layer does not meet the standard, and the arrangement density of the fixing buckle on the fixing plate for the next batch is increased.

7. The method of claim 6, wherein the fireproof door core material for security doors is prepared by mixing 100 parts by weight of the fireproof door core material for security doors of claim 1 with 0.1 to 10 parts by weight of a foaming agent. The arrangement spacing and spring parameters of the spring are determined based on the design thickness of the inner core of the security door, and the spring parameters include the free height and compression ratio of the spring.

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