Production process of gypsum board with high nail-holding power
阅读说明：本技术 一种高握钉力石膏板的生产工艺 (Production process of gypsum board with high nail-holding power ) 是由 孙瑞海 方祥文 张奇 谢晖奕 李自强 于 2019-10-22 设计创作，主要内容包括：本发明实施例公开了一种高握钉力石膏板的生产工艺,包括以下步骤：S100、制备发泡水待用；S200、将熟石膏粉和无机类纤维利用分级干拌机构干拌混合后加水在混合机混合均匀,制备初混浆料；S300、将有机粘结剂、减水剂、纳米二氧化硅、超细生石膏粉和初混浆料进行混合,形成再混浆料；S400、发泡水发泡进入混合机中和再混浆料进行混合形成板芯浆料；S500、将混合好的板芯浆料浇筑在模具内,待石膏凝固后脱模,形成石膏板,本发明石膏板通过改进石膏板板芯配方,使石膏板具有更高的握钉力；在原有玻璃纤维的长度范围内再进一步细分,然后分别将细分后的玻璃纤维分别均匀的混合在熟石膏粉中,以提高不同长度玻璃纤维分布的均匀程度,改善石膏板的性能。(The embodiment of the invention discloses a production process of a gypsum board with high nail-holding power, which comprises the following steps: s100, preparing foaming water for later use; s200, dry-mixing the gypsum powder and the inorganic fibers by using a grading dry-mixing mechanism, adding water, and uniformly mixing in a mixer to prepare a primary mixed slurry; s300, mixing an organic binder, a water reducing agent, nano silicon dioxide, superfine gypsum powder and the primary mixed slurry to form secondary mixed slurry; s400, foaming water is foamed and enters a mixing machine to be mixed with the remixed slurry to form board core slurry; s500, pouring the mixed core slurry into a mold, and demolding after the gypsum is solidified to form the gypsum board; the gypsum powder is further subdivided within the length range of the original glass fiber, and then the subdivided glass fibers are respectively and uniformly mixed in the calcined gypsum powder so as to improve the uniformity of the distribution of the glass fibers with different lengths and improve the performance of the gypsum board.)
1. A production process of a gypsum board with high nail-holding power is characterized by comprising the following steps:
s100, injecting a foaming agent into a foaming mold for foaming to form foaming water for later use;
s200, dry-mixing the gypsum powder and the inorganic fibers by using a grading dry-mixing mechanism, adding water, and uniformly mixing in a mixer to prepare a primary mixed slurry;
s300, mixing an organic binder, a water reducing agent, nano silicon dioxide, superfine gypsum powder and the primary mixed slurry to form secondary mixed slurry;
s400, foaming water is foamed into a mixing machine by adopting a dynamic foaming device and then mixed with slurry to form board core slurry;
and S500, pouring the mixed board core slurry into a mold, and demolding after the gypsum is solidified to form the gypsum board.
2. The production process of the gypsum board with high nail-holding power according to claim 1, wherein: the inorganic fiber is glass fiber, the length of the glass fiber is 5-10 mm, and the addition amount of the glass fiber is 2% of that of the calcined gypsum powder.
3. The production process of the gypsum board with high nail-holding power according to claim 1, wherein: the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent, and the addition amount of the water reducing agent is 0.2-0.6% of that of the calcined gypsum powder.
4. The production process of the gypsum board with high nail-holding power according to claim 1, wherein: the addition amount of the nano silicon dioxide is 1-5% of that of the calcined gypsum powder.
5. The production process of the gypsum board with high nail-holding power according to claim 1, wherein: the organic binder is one or a combination of any more of gelatinized starch, PVA powder or hydroxypropyl starch, and the addition amount of the organic binder is 0.2-1% of that of the calcined gypsum powder.
6. The production process of the gypsum board with high nail-holding power according to claim 5, wherein: the PVA powder is high-polymerization powder, and the addition amount of the high-polymerization powder is 0.5-1% of that of the calcined gypsum powder.
7. The production process of the gypsum board with high nail-holding power according to claim 5, wherein: the PVA powder is added in a dry adding mode.
8. The production process of the gypsum board with high nail-holding power according to claim 1, wherein: hierarchical dry mixing mechanism includes raw material bucket (1), the below of raw material bucket (1) is provided with by power device drive and along sieve (3) are crossed in grades of symmetry axle (2) upset from top to bottom, be provided with a plurality of filter sieves (4) that are used for sieving different diameter materials that link up from top to bottom on sieve (3) are crossed in grades the below of filter sieve (4) all is provided with corresponding filtration and holds feed cylinder (5), every material in the filtration and hold feed cylinder (5) all carries out the homogeneous mixing with the calcined gypsum powder.
9. The process for producing a gypsum board with high nail-holding power according to claim 8, wherein: two adjacent filter material-bearing barrels (5) are connected in a separated mode through partition plates (6), and the upper ends of the partition plates (6) are connected with the bottom surfaces of the graded sieve plates (3) through elastic partition cloth (7).
10. The process for producing a gypsum board with high nail-holding power according to claim 8, wherein: the sieve plate screening device is characterized in that blocking plates (8) are arranged on the peripheral side walls of the sieve plates (3) in a grading mode, cover plates (9) are arranged above the blocking plates (8), feeding openings (10) corresponding to discharging openings (11) of the raw material barrels (1) are formed in the cover plates (9), and the discharging openings (11) and the feeding openings (10) are connected through canvas soft (12).
Technical Field
The embodiment of the invention relates to the technical field of gypsum board production processes, in particular to a production process of a gypsum board with high nail-holding power.
Background
The gypsum board is a material prepared by taking building gypsum as a main raw material. The building material has the advantages of light weight, high strength, small thickness, convenient processing, sound insulation, heat insulation, fire prevention and other good performances, and is one of the currently-developed novel light boards. Gypsum boards have been widely used for interior partition walls, wall covering panels (instead of wall plasters), ceilings, sound absorbing panels, floor base boards, and various decorative boards in various buildings such as houses, office buildings, shops, hotels, and industrial plants, and are not suitable for being installed in bathrooms or kitchens. In traditional cognition, the shrouding of gypsum board mainly used furred ceiling, along with the development of technology and design, the range of application of gypsum board is more and more wide, and important links such as wall body, wall can both see the application of gypsum board, and the quantity demand of whole fitment to the gypsum board is more and more.
However, the existing gypsum board has poor formulation, limited strength and impact resistance of the core, poor nail holding power of the surface of the gypsum board for decoration, and difficult to bear common decoration operations such as punching, drilling and nailing, and therefore, the development of a high nail holding power gypsum board capable of partially replacing the decoration and decoration is urgently needed.
Disclosure of Invention
Therefore, the embodiment of the invention provides a production process of a gypsum board with high nail-holding power, which aims to solve the problem of low nail-holding power of the gypsum board in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a production process of a gypsum board with high nail-holding power comprises the following steps:
s100, injecting a foaming agent into a foaming mold for foaming to form foaming water for later use;
s200, dry-mixing the gypsum powder and the inorganic fibers by using a grading dry-mixing mechanism, adding water, and uniformly mixing in a mixer to prepare a primary mixed slurry;
s300, mixing an organic binder, a water reducing agent, nano silicon dioxide, superfine gypsum powder and the primary mixed slurry to form secondary mixed slurry;
s400, foaming water is foamed into a mixing machine by adopting a dynamic foaming device and then mixed with slurry to form board core slurry;
and S500, pouring the mixed board core slurry into a mold, and demolding after the gypsum is solidified to form the gypsum board.
The embodiment of the invention is further characterized in that the inorganic fiber is glass fiber, the length of the glass fiber is 5-10 mm, and the addition amount of the glass fiber is 2% of the addition amount of the calcined gypsum powder.
The embodiment of the invention is also characterized in that the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent, and the addition amount of the water reducing agent is 0.2-0.6% of the addition amount of the calcined gypsum powder.
The embodiment of the invention is also characterized in that the addition amount of the nano silicon dioxide is 1-5% of the addition amount of the calcined gypsum powder.
The embodiment of the invention is also characterized in that the organic binder is one or the combination of any more of gelatinized starch, PVA powder or hydroxypropyl starch, and the addition amount of the organic binder is 0.2-1% of that of the calcined gypsum powder.
The embodiment of the present invention is characterized in that the PVA powder is a high-polymerization powder, and the addition amount of the high-polymerization powder is 0.5 to 1% of the addition amount of the plaster powder.
The embodiment of the invention is also characterized in that the PVA powder is added by adopting a dry adding mode.
The embodiment of the invention is further characterized in that the grading dry-mixing mechanism comprises a raw material barrel, a grading sieve plate which is driven by a power device and overturns up and down along a symmetry axis is arranged below the raw material barrel, a plurality of filter sieves which are communicated up and down and used for sieving materials with different diameters are arranged on the grading sieve plate, a corresponding filtering material-bearing barrel is arranged below each filter sieve, and the materials in each filtering material-bearing barrel are uniformly stirred with calcined gypsum powder.
The embodiment of the invention is also characterized in that the adjacent two filter material-bearing barrels are connected in a separating way through a separating plate, and the upper end of the separating plate is connected with the bottom surface of the grading sieve plate through elastic separating cloth.
The embodiment of the invention is further characterized in that the side walls of the periphery of the grading sieve plate are provided with the blocking plates, the cover plate is arranged above the blocking plates, the cover plate is provided with a feeding port corresponding to the discharging port of the raw material barrel, and the discharging port and the feeding port are in flexible connection through canvas.
The embodiment of the invention has the following advantages:
(1) according to the gypsum board, the formula of the core of the gypsum board is improved, and the raw materials such as inorganic fibers, nano silicon dioxide, ultrafine gypsum powder and the like are added into the calcined gypsum powder, so that the tensile strength and the fracture toughness of the gypsum board are improved, and the gypsum board has higher nail-holding power;
(2) the invention further subdivides the original glass fiber within the length range, and then respectively and uniformly mixes the subdivided glass fibers in the plaster powder so as to improve the uniformity of the distribution of the glass fibers with different lengths and improve the performance of the gypsum board.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic structural diagram of a staged dry mixing mechanism of the present invention.
In the figure:
1-a raw material barrel; 2-axis of symmetry; 3-grading and screening the sieve plate; 4-a filter sieve; 5-a filtering material-bearing cylinder; 6-a partition plate; 7-elastic dividing cloth; 8-a barrier plate; 9-cover plate; 10-a feeding port; 11-a discharge hole; 12-the canvas is soft.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the invention provides a production process of a gypsum board with high nail-holding power, which comprises the following steps:
s100, injecting a foaming agent into a foaming mold for foaming to form foaming water for later use;
s200, dry-mixing the gypsum powder and the inorganic fibers by using a grading dry-mixing mechanism, adding water, and uniformly mixing in a mixer to prepare a primary mixed slurry;
the inorganic fiber is used for improving the strength of the product. Preferably, the inorganic fibers are glass fibers, the length of the glass fibers is 5-10 mm, and the addition amount of the glass fibers is 2% of the addition amount of the gypsum powder.
The fiber has strong tensile strength and fracture toughness, and when the fiber reinforced gypsum-based composite material is stressed, the fiber in the gypsum composite material can absorb larger energy, so that the microcrack expansion of a gypsum matrix is inhibited, and the strength is improved.
The reinforcing mechanism of the glass fiber and the addition of the glass fiber can effectively block the development of cracks, relieve the stress concentration phenomenon at the tips of the cracks, reduce the number of crack sources and improve the performance of the composite material.
In the preparation process, the plaster powder and the inorganic fibers are dry-mixed, water is added, and a wet-mixing method is adopted, so that the glass fibers are strongly dispersed in the dry-mixing process of the plaster powder, the glass fibers are uniformly distributed in a monofilament shape, good dispersion can be realized, the possibility of adhesion and agglomeration among the fibers is low, and the fibers can play a reinforcing role in the plaster powder to the maximum extent.
The length of the selected glass fiber is 5-10 mm, but the glass fiber with the same length range is difficult to be uniformly distributed in the calcined gypsum powder, and the higher performance of the glass fiber cannot be exerted. It is therefore contemplated to subdivide the glass fibers further within the range of the length of the original glass fibers. Then, the subdivided glass fibers are respectively and uniformly mixed in the calcined gypsum powder so as to improve the uniformity of the distribution of the glass fibers with different lengths. Specifically, the method comprises the following steps:
the grading dry mixing mechanism comprises a raw material barrel 1, and a
Preferably, the side walls of the periphery of the graded
In addition, adjacent two filter and hold the
When the glass fiber grading sieve plate is used, glass fibers with a certain length in the raw material barrel 1 firstly enter the
S300, mixing an organic binder, a water reducing agent, nano silicon dioxide, superfine gypsum powder and the primary mixed slurry to form secondary mixed slurry;
the organic binder is one or a combination of any more of gelatinized starch, PVA powder or hydroxypropyl starch, and the addition amount of the organic binder is 0.2-1% of that of the calcined gypsum powder. The gelatinized starch is selected, and the addition amount is preferably 0.5%.
The PVA powder is high-polymerization powder to reduce the influence on the viscosity of the gypsum slurry in the mixing process, and the addition amount of the high-polymerization powder is 0.5-1% of that of the calcined gypsum powder. Preferably, the PVA powder is added by a dry addition method, and the addition amount is preferably 0.8%.
The water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent, and the addition amount of the water reducing agent is 0.2-0.6% of that of the calcined gypsum powder. The water reducing agent is used for reducing the water-paste ratio of the slurry from common 80% to about 67% so as to reduce the evaporation of water in the drying process of the product, and the larger the water-paste ratio is, the greater the influence on the strength of the product is.
The addition amount of the nano silicon dioxide is 1-5% of that of the calcined gypsum powder, and the product performance is further improved.
The superfine gypsum powder is used as a filler to reduce the water-paste ratio required by the slurry and improve the product performance.
S400, foaming water is foamed into a mixing machine by adopting a dynamic foaming device and then mixed with slurry to form board core slurry;
and S500, pouring the mixed board core slurry into a mold, and demolding after the gypsum is solidified to form the gypsum board.
The nail holding power of the gypsum board core manufactured by the method is improved by about 80 percent and is improved to more than 750N compared with that of a common gypsum board product.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
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