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For decades, the wooden base plate for containers and its manufacturing process have been reciprocating under full load due to the technical indicators of physical and mechanical properties as stipulated by strict national standards and the strict rolling shear strength test during the process of building. The sampling procedure of 7260kg load trolley test under load and stamping is carried out to test the maximum deformation and permanent deformation of the bottom plate under the impact of instantaneous fatigue strength. Due to its strict technical requirements, the wooden floor board has always relied on cold hardwood and hardwood hardwood sheet manufacturing. . In order to save wood and reduce costs, with the development of the plywood industry in the 1960s, the use of these trees to produce multi-layer plywood has begun. Due to the long growth cycle of these species, large-scale harvesting has dried up these hardwood resources, resulting in container wood floors. The contradiction between supply and demand of raw materials and high prices. With the development of China's container manufacturing industry, since the 1980s, 85% of the world's container manufacturing industry has concentrated on production in China, with a maximum output of 1.6 million TU. Therefore, it is imperative to make rational use of domestic wood instead of imported wood for wood flooring.
During the "Eighth Five-Year Plan" period, the State Planning Commission and the Ministry of Science and Technology issued a research project on the manufacture of container wood floors made of domestically produced materials, and issued them to the National Science and Technology Commission's Wood-based Panel Formwork Research and Promotion Center----Ruida Formwork Corporation, and listed it in the country. The "Eighth Five-Year Plan" project and the "National Science and Technology Achievements Key Promotion Plan". After nearly eight years of material selection and research, the research and manufacturing process of bamboo floor and the research and manufacturing process of bamboo and wood composite floor and bamboo and fiber composite floor have been carried out. Due to their unstable technical performance and immature processes, these substrates have not been recognized by the market and are used in large quantities. With the renewal of materials in China's construction industry, the wooden doors and windows and scaffolds that were originally used in construction projects were replaced by steel or aluminum alloys, thus alleviating the contradiction between supply and demand of domestic timber, and the available domestic timber supply and Varieties have changed, and the price of domestic timber has decreased. Therefore, it is more mature to study the use of domestically harvestable wood that has not been used to manufacture container wood floors. In order to accelerate the research and development of domestic timber manufacturing container wood floor, in 1999, Beijing Huaxia Railway Container Technology Development Co., Ltd. and Shanghai Zoton Company jointly carried out the research and development process of this subject, "Huatie" registered trademark of domestic wood made of wood After two years of research, the trial production and mass production have been tested by French BV, American ABS, French Lloyd's and China CCS Classification Society. 20 batches of load tests were carried out on 20-foot, 40-foot container wood floors, all of which passed product certification and obtained 20 product certifications. By July 2001, a total of 8,000 TU of wood floor slabs were used in various box types.
After two years of practical use, the manufacturing process of domestic wood-made container wood floor is relatively mature. The physical and mechanical properties of the bottom plate can be completely controlled to meet the requirements of international standards, and the strength can fully meet the requirements of use, but due to the domestic wood itself Defects, there is a big gap between the appearance quality of the bottom plate and the imported wood floor. At the same time, the production equipment is backward, the management level is low, the quality assurance system has not yet been established, and the core plate is formed in the outer dimensions, processing defects and material defects. There is a gap between the seam and the lamination compared with the imported wood base. According to the mass production and actual use, the process manufacturing method for manufacturing container wood floor with domestic wood has been mature and stable. The existing defects, in addition to the material of the domestic wood itself, the remaining processing quality defects, as long as the strict establishment of a sound quality assurance system, the implementation of process indicators, most of the defects can be overcome.
Plywood structure, dimensional tolerance, physical and mechanical properties and surface processing defects, material defects of domestic wood manufacturing container wood floor, plywood structure, dimensional tolerance, physical and mechanical properties and processing defects of "Huatie" brand wooden floor made of domestic wood The material defects are determined according to the international wooden floor standard and the national standard for the quality standards of the domestic wood hardwood and softwood surface. In order to compare with the imported clone and the Abidin wood floor standard, the Japanese PAIKEN is also listed in Table 1. , France BV, Cambodia KINGWOOD, Indonesia STUD and China (Shenzhen) Everbright five quality standards for comparison and reference.
According to the domestic wood made by the wood listed in Table 1, the indicators of the plywood structure, dimensional tolerances, physical and mechanical properties, etc. are completely the same as the international standard wooden baseboard, and can be fully realized in the actual product. In the processing defects and material defects are in accordance with the national standards of the People's Republic of China (GB9846.5-88) domestic wood hardwood, coniferous surface surface defects allowed, the preparation of domestic timber national standard is in accordance with the domestic wood itself defects allowed tolerance Compared with the allowable defects stipulated by international standards, the gaps are more obvious due to the different materials used in the development of standards, especially cracks, chromatic aberrations, knots, wormholes, joints and other defects. Since these defects are defects in the domestic wood itself, the use of domestic wood cannot be changed. Therefore, when the "Huatie" base plate is formulated with material surface defect standards, it is formulated in accordance with national standards. These defects are allowed in the national standards of the domestically produced materials. Since the container industry has always used the imported quality clones with the surface quality and the Abbott wood bottom plate, the container industry has a large contrast compared with the domestic materials. Therefore, most of the quality problems that occur in mass production are mostly due to the contradiction between the standards of domestically produced materials that cannot be compared with imported materials and the different standards that exist between them. Wood made wood floors cannot be overcome and solved.
Due to the backward processing methods, the production management and quality assurance system have not been established and improved, and the processing defects occurred: the defects such as penetration, sand penetration, patchwork repair, and seam lamination are rectified in the process management of the factory, and the quality assurance system is strictly established. It should be said that it can fully meet the requirements of international standards.
Company Name: Shenzhen Yilongbang Information Development Co., Ltd.
Address: Room D, 13th Floor, West Block, Ai Di Building, Binhe Road, Shenzhen
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Project Name: Domestic wood manufacturing container wood floor patent number.9 Application time: August 15, 2000 Patent introduction