CN109822939B - Method for reinforcing composite material template panel - Google Patents
Method for reinforcing composite material template panel Download PDFInfo
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- CN109822939B CN109822939B CN201910184204.8A CN201910184204A CN109822939B CN 109822939 B CN109822939 B CN 109822939B CN 201910184204 A CN201910184204 A CN 201910184204A CN 109822939 B CN109822939 B CN 109822939B
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Abstract
The invention provides a method for reinforcing a composite material template panel, which comprises the following steps: firstly, placing a base material in a mould, and carrying out primary mould pressing to obtain a template bottom layer; secondly, opening the die for a short time, and placing the pre-cut fiber reinforced material layer on the base material layer at the bottom layer of the template; thirdly, placing a material block for molding the surface layer of the template on the fiber reinforced material layer; fourthly, carrying out secondary die pressing after die assembly to obtain a formed composite material template, wherein the composite material template comprises a template bottom layer, a fiber reinforced material layer and a template surface layer from bottom to top; and fifthly, carrying out post-treatment on the molded composite material template to obtain a final product. By adopting the method, the impact property and the bending property of the product are greatly improved, the surface shrinkage is controlled, the deformation surface quality of the product is improved, and the surface is smooth.
Description
Technical Field
The present invention relates to a method for reinforcing a composite formwork panel.
Background
At present, composite material templates are widely popularized in the industry with the advantages of light weight and high strength, but due to the performance limitation of plastic materials, the product panels often have the appearance defects of surface gluten streaks, cold scars and the like, the panel surface strength is insufficient and the like, the panel thickness is generally increased, the number of ribs is increased and the like, the cost is increased, the surface thickness is increased, the shrinkage rate is increased, the structure is changed, the overall shrinkage is inconsistent, the product size is shrunk and deformed, the improvement effect is not obvious, and the temporary solution and permanent solution are avoided.
The Chinese utility model with publication number of CN203373961U, published as 20140101, discloses a wear-resistant plastic building template, which is a plastic plate, wherein a polytetrafluoroethylene layer is sprayed or painted on one side surface of the building template; the plastic board is embedded with two layers of enhancement layers, and the two layers of enhancement layers are located 2 ~ 5mm degree of depth departments apart from the upper and lower surface of plastic board respectively. The reinforcing layer may be one or two of thin steel, aluminum plate, steel mesh, reinforcing fiber cloth and non-woven fabric. Compared with the prior art, the surface of the plastic building template is provided with the polytetrafluoroethylene layer with high wear resistance, so that the wear resistance is improved, the building template is not easy to scratch or wear, and the slime content after the template is removed is reduced. And the polytetrafluoroethylene layer is arranged on the surface of the plastic building template by using a painting or spraying technology, so that the surface of the building template has certain roughness, thereby being beneficial to the treatment of the later stage concrete wall surface and saving the using amount of the polytetrafluoroethylene. The building template has excellent comprehensive performance, the service life is prolonged by more than 3 times, and the practicability is strong. Although the reinforcing layer is adopted to improve the comprehensive performance of the building template, the reinforcing layer can not improve the surface quality of the building template, but improves the wear-resisting property of the surface by spraying or painting a polytetrafluoroethylene layer, and reduces the slime content after the template is removed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for reinforcing a composite material template panel, which greatly improves the impact property and the bending property of a product, controls the surface shrinkage, improves the deformation surface quality of the product and has a smooth surface by adopting a novel separated mould pressing process.
The invention is realized by the following steps: a method for composite form panel reinforcement, characterized by: the method comprises the following steps:
firstly, placing a base material in a mould, and carrying out primary mould pressing to obtain a template bottom layer;
secondly, opening the die for a short time, and placing the pre-cut fiber reinforced material layer on the base material layer at the bottom layer of the template;
thirdly, placing a material block for molding the surface layer of the template on the fiber reinforced material layer;
fourthly, carrying out secondary die pressing after die assembly to obtain a formed composite material template, wherein the composite material template comprises a template bottom layer, a fiber reinforced material layer and a template surface layer from bottom to top;
and fifthly, carrying out post-treatment on the molded composite material template to obtain a final product.
Further, the fiber reinforced material layer is a long fiber reinforced material layer or a continuous fiber reinforced material layer.
Further, the fiber reinforced material layer is a fiber layer which is preformed through at least one process of weaving, compounding and winding and has the thickness of 0.3-1.0 cm.
Further, the fiber reinforced material layer is glass fiber mesh cloth or a prepreg tape.
Further, the thickness of the surface layer of the molding board is preferably 0.5 to 2 cm.
Further, set up two stations simultaneously, share one set of manipulator, when No. 1 station carries out the mould pressing with the manipulator, No. 2 stations place the fibre reinforced plastic layer with another manipulator, otherwise, when No. 1 station places the fibre reinforced plastic layer with another manipulator, No. 2 stations carry out the mould pressing with the manipulator.
Further, the pressure is maintained for not less than 60s under 1500-1900 t pressure for the first die pressing and the second die pressing, and the die temperature is 30-60 ℃.
The invention has the following advantages: the invention adopts a novel separation mould pressing process to divide the production mould pressing process into two stages, and a fiber reinforced layer is added in the middle of the panel, so that the impact property and the bending property of the product are greatly improved. The common injection molding material has the impact performance of 15-20 kJ/square meter and the flexural modulus of 2000-3000 MPa; the impact performance of the composite material template obtained by the process is 30-40 kJ/square meter, and the flexural modulus is 6000-8000 MP; when the fiber reinforced layer is a long fiber reinforced material layer or a continuous fiber reinforced material layer, the impact performance is 60-100 kJ/square meter, and the flexural modulus is 8000-12000 MPa; the surface shrinkage of the composite material template is controlled, the deformation surface quality of a product is improved, the surface is smooth, a polytetrafluoroethylene layer is not required to be sprayed or painted to improve the surface quality, the original rib shrinkage mark is 0.3-0.4 mm, and the surface shrinkage mark is reduced to be below 0.1mm after the improvement.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic diagram of the product obtained by the method of the present invention.
Detailed Description
Referring to fig. 1, the method for reinforcing a composite form panel of the present invention includes the following steps:
firstly, placing a base material in a mould 1, and obtaining a template bottom layer 21 through first mould pressing; the first mould pressing is carried out under the pressure of 1500-1900 t for not less than 60s, and the mould temperature is 30-60 ℃.
Secondly, opening the die for a short time, and placing the pre-cut fiber reinforced material layer 22 on the base material layer 21 at the bottom layer of the template;
thirdly, a material block 232 for molding the template surface layer 23 is placed on the fiber reinforced material layer 22;
fourthly, performing secondary die pressing after die assembly, wherein the pressure maintaining is performed for not less than 60 seconds under the pressure of 1500-1900 t, the die temperature is 30-60 ℃, and the formed composite material template 2 is obtained, and as shown in figure 2, the composite material template 2 comprises a template bottom layer 21, a fiber reinforced material layer 22 and a template surface layer 23 from bottom to top;
fifthly, post-processing, such as trimming, perforating and the like, is carried out on the molded composite material template 2 to obtain a final product.
It is preferred when the layer of fibrous reinforcement 22 is a layer of long fiber reinforcement or a layer of continuous fiber reinforcement. Such as a glass fiber mesh or a prepreg tape.
The length of the chemical fiber is as follows: the length of the short fiber is generally 35-150 mm, and the short fiber also comprises a medium long fiber with the length of about 51-76 mm; the long fibers are longer than the short fibers, and some can reach several meters to thousands of meters.
Continuous fibers have a sufficiently large aspect ratio (typically greater than 1000) to enable uninterrupted reinforcement along the length.
The glass fiber gridding cloth is mainly woven by medium-alkali or alkali-free glass fiber yarns, and glass fiber gridding cloth series products coated by alkali-resistant high-molecular emulsion comprise alkali-resistant GRC glass fiber gridding cloth, alkali-resistant wall body reinforcement, mosaic special net sheets, stone and marble back-pasted gridding cloth.
Prepreg tape refers to Continuous Fiber Reinforced Thermoplastic Composites (CFRTP), Continuous fibers or fabrics impregnated with reinforcement (glass fibers, carbon fibers, etc.) and a resin matrix.
The fiber reinforced material layer 22 is a fiber layer which is preformed through at least one of weaving, compounding and winding and has a thickness of 0.3-1.0 cm.
In addition, the thickness of the surface layer 23 of the molding board is preferably 0.5-2cm, and the surface layer with the thickness can ensure that the distance between the fiber reinforced material layer 22 and the surface of the composite material molding board 2 reaches a reasonable range, can fully improve the surface quality, ensure that the surface is smooth, has obvious rib shrinkage marks and improves the surface shrinkage marks.
Furthermore, in order to improve production efficiency and save the repeated setting of the manipulator, because the manipulator of placing the fiber reinforced material layer is different from the manipulator of the moulding-die, so two stations can be set up simultaneously, share one set of manipulator, when the manipulator is used for moulding the No. 1 station, the fiber reinforced material layer is placed with another manipulator to No. 2 station, otherwise, when the fiber reinforced material layer is placed with another manipulator to No. 1 station, the manipulator is used for moulding the No. 2 station.
The invention adopts a novel separation mould pressing process to divide the production mould pressing process into two stages, and a fiber reinforced layer is added in the middle of the panel, so that the impact property and the bending property of the product are greatly improved. The common injection molding material has the impact performance of 15-20 kJ/square meter and the flexural modulus of 2000-3000 MPa; the composite material template obtained by the process has the impact performance of 25-35 kJ per square meter and the flexural modulus of 4000-6000 MP; when the fiber reinforced layer is glass fiber grid cloth or a glass fiber prepreg tape, the glass fiber (LFTD) reinforced surface layer material has the impact performance of 60-100 kJ/square meter and the flexural modulus of 8000-12000 MPa; the surface shrinkage of the composite material template is controlled, the deformation surface quality of a product is improved, the surface is smooth, the shrinkage mark of an original rib is 0.3-0.4 mm, and the surface shrinkage mark is reduced to be below 0.1mm after the surface shrinkage mark is improved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (4)
1. A method for composite form panel reinforcement, characterized by: the method comprises the following steps:
(1) placing the base material in a mold, and performing primary mold pressing to obtain a template bottom layer;
(2) opening the die for a short time, and placing the pre-cut fiber reinforced material layer on the base material layer at the bottom layer of the template;
the fiber reinforced material layer is a long fiber reinforced material layer or a continuous fiber reinforced material layer, is preformed by at least one of weaving, compounding and winding, and is 0.3-1.0 cm thick; the length of the long fibers in the long fiber reinforced material layer is more than 150mm, and the aspect ratio of the continuous fibers of the long fiber reinforced material layer is more than 1000;
(3) placing a material block for molding a template surface layer on the fiber reinforced material layer;
(4) carrying out secondary die pressing after die assembly to obtain a formed composite material template, wherein the composite material template comprises a template bottom layer, a fiber reinforced material layer and a template surface layer from bottom to top; the thickness of the surface layer of the molding template is 0.5-2 cm;
(5) and carrying out post-treatment on the molded composite material template to obtain a final product.
2. A method for composite form panel reinforcement according to claim 1, wherein: the fiber reinforced material layer is glass fiber gridding cloth or a prepreg tape.
3. A method for composite form panel reinforcement according to claim 1, wherein: set up two stations simultaneously, one set of manipulator of sharing, when No. 1 station carries out the mould pressing with the manipulator, No. 2 stations place the fibre reinforced material layer with another manipulator, otherwise, when No. 1 station places the fibre reinforced material layer with another manipulator, No. 2 stations carry out the mould pressing with the manipulator.
4. A method for composite form panel reinforcement according to claim 1, wherein: the pressure maintaining for the first mold pressing and the second mold pressing is not less than 60s at 1500-1900 t, and the mold temperature is 30-60 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184204.8A CN109822939B (en) | 2019-03-12 | 2019-03-12 | Method for reinforcing composite material template panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910184204.8A CN109822939B (en) | 2019-03-12 | 2019-03-12 | Method for reinforcing composite material template panel |
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| CN109822939A CN109822939A (en) | 2019-05-31 |
| CN109822939B true CN109822939B (en) | 2021-10-22 |
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| CN113320191A (en) * | 2021-06-01 | 2021-08-31 | 华东理工大学 | Pultrusion method of high-performance thermoplastic composite material I-beam |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294830A (en) * | 2011-09-02 | 2011-12-28 | 宁波华业材料科技有限公司 | Method for manufacturing thermoplastic fibre reinforced building template |
| CN103358627A (en) * | 2012-04-01 | 2013-10-23 | 上海杰事杰新材料(集团)股份有限公司 | High performance fiber layer composite board and preparation method thereof |
| CN207633746U (en) * | 2017-08-09 | 2018-07-20 | 福建海源新材料科技有限公司 | A kind of bilayer LFT-D building templates |
-
2019
- 2019-03-12 CN CN201910184204.8A patent/CN109822939B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294830A (en) * | 2011-09-02 | 2011-12-28 | 宁波华业材料科技有限公司 | Method for manufacturing thermoplastic fibre reinforced building template |
| CN103358627A (en) * | 2012-04-01 | 2013-10-23 | 上海杰事杰新材料(集团)股份有限公司 | High performance fiber layer composite board and preparation method thereof |
| CN207633746U (en) * | 2017-08-09 | 2018-07-20 | 福建海源新材料科技有限公司 | A kind of bilayer LFT-D building templates |
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Effective date of registration: 20220114 Address after: 350108 01, floor 11, building B, network communication center, block a, houting village, high tech Zone, Fuzhou City, Fujian Province Patentee after: FUJIAN EANTE NEW BUILDING MATEIRALS CO.,LTD. Address before: 354200 tf06, phase IV, Tongyou Industrial Park, Wuyi New District, Jianyang District, Nanping City, Fujian Province Patentee before: FUJIAN HAIYUAN NEW MATERIAL TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20220411 Address after: 350108 01, floor 11, building B, network communication center, block a, houting village, high tech Zone, Fuzhou City, Fujian Province Patentee after: FUJIAN EANTE NEW BUILDING MATEIRALS CO.,LTD. Patentee after: FUJIAN HAIYUAN NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: 350108 01, floor 11, building B, network communication center, block a, houting village, high tech Zone, Fuzhou City, Fujian Province Patentee before: FUJIAN EANTE NEW BUILDING MATEIRALS CO.,LTD. |
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Effective date of registration: 20230406 Address after: 350108 01, floor 11, building B, network communication center, block a, houting village, high tech Zone, Fuzhou City, Fujian Province Patentee after: FUJIAN EANTE NEW BUILDING MATEIRALS CO.,LTD. Address before: 350108 01, floor 11, building B, network communication center, block a, houting village, high tech Zone, Fuzhou City, Fujian Province Patentee before: FUJIAN EANTE NEW BUILDING MATEIRALS CO.,LTD. Patentee before: FUJIAN HAIYUAN NEW MATERIAL TECHNOLOGY Co.,Ltd. |