最新刊期
期 0 ， 2020
- 摘要：Three groups of Dahurian larch（Larix gmelinii） dimension lumber with different dimensions of 40 mm × 65 mm × 4000 mm,40 mm × 90 mm× 4000 mm,and 40 mm × 140 mm× 4000 mm,were visually graded according to Chinese Standard GB 50005-2003.The main defect causes that degraded the lumber were identified for each group.The results showed that:1) different sizes of lumber differentiated in proportion to each grade of dimension lumber;2) knots,shake/checks and skips were the main defects that lowered the lumber grade.It was proposed that further study should be conducted toward optimizing processing and drying methods to improve the quality of dimension lumber.关键词：Dahurian larch;dimension lumber;visual grading;defect
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- 29
发布时间：2021-02-08
- 摘要：A chemical impregnation method was used to improve the surface hardness of plantation grown poplar.The impregnation solutions selected for this study were:A（mixture of methyl methacrylate,butyl acrylate,vinyl acetate）,B（mixture of styrene-acrylate emulsion and silica solution） and C（mixture of isocyanates and acetone）.Treated lumber chemical retention level was used to evaluate the modification effect.Optimized process conditions are identified and presented.关键词：poplar wood;impregnant;formula;one-factor experiment
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- 154
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- 0
发布时间：2021-02-08 - 摘要：A typical process for slicing oak veneer was recorded using a camera with a magnifier.The development and formation of back clearance were described,and observed and analyzed during slicing.We found that cutting thickness,inclination angle,and cutting speed were the major factors influencing veneer back clearance during slicing.关键词：longitudinal slicing;back clearance;veneer thickness
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- 146
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- 7
发布时间：2021-02-08 - 摘要：Characteristics of wood doors available in the Chinese domestic market were analyzed and classified according to their components such as materials,structure and parts.Based on these characteristics,the authors designed a coding method with twelve digits for identifying and differentiating wood doors.The detailed structure and rules of this method were explained.This specific coding system will help manufacturers to improve their production efficiency.关键词：wooden doors;coding;rules
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- 209
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- 3
发布时间：2021-02-08 - 摘要：The leachability of lumber treated with different inorganic boron solutions was determined according to the American Wood Protection Association standard AWPA E11-06.The results showed that the boron leaching rate of treated lumber were decreased significantly by using a two-step method;which means lumber is treated with borax and then calcium chloride or polyvinyl alcohol（PVA P1763）.The boron leaching rates of the treated lumber was between 39.6% and 61.4% after water immersion for 2-weeks.However,it was observed that the boron leaching rates of the lumber treated with either zinc/calcium chloride or borax/boric acid in one step method remained the same.关键词：borax;Boric acid;zinc/calcium chloride;alcohol compound;leachability
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- 119
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- 4
发布时间：2021-02-08
Research & Development
- 摘要：Based on the trend and background of low-carbon economy development in China,the authors discussed the important economic role of the wood product industry and the future direction of technology development.It is recognized that wood products led to significant reduction in atmosphere carbon by partially replacing the other high-carbon intensive materials,extending carbon storage period,and reducing energy and raw material consumptions.It is recommend that the key economic and technological strategies for the wood product industry should include reasonable utilization of forest and other bio-based raw materials,more applications of wood products in building construction,and explicit policy for managing carbon sequestration in waste wood resources.关键词：low-carbon economy;wood product industry;carbon reduction;technological and economic strategy
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- 468
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- 25
发布时间：2021-02-08 - 摘要：Populus deltoides lumber were dried using high temperature dehumidification and conventional methods under the same schedule.Energy consumption and drying quality during the two drying methods were monitored and compared.Results showed that the energy consumption was different during various drying stages.It was found that the most effective way to save energy was in the initial period and it could save up to 30.5%.The high-temperature dehumidification drying consumed 34.1% less energy than the conventional drying without compromising the drying quality.It was expected that high-temperature dehumidification would increase its popularity along with the conventional drying in the future.关键词：high temperature drying;Dehumidification drying;energy saving;Populus Deltoides
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- 284
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- 8
发布时间：2021-02-08 - 摘要：Implementing information technology and systems is an effective way for wood-based panel companies to improve their business management,increase resource utilization,reduce cost,and enhance overall competitiveness.An enterprise resource planning（ERP） system presented in this paper was designed for a Chinese medium-sized wood-based panel company.The ERP structure and the interaction of each module within the system were described.This study could provide an example for other wood-based panel companies to develop their information systems.关键词：wood-based panel;informationization;enterprise resource planning（ERP）system
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- 70
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- 1
发布时间：2021-02-08 - 摘要：This article illustrates the main equipment used in the wood floor manufacturing process.Lamella machines,press points,calibrating sanders,roller coating machines,and profiling machines are described and their performance and specifications are introduced.关键词：Parquet;processing;Key equipment
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- 329
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- 4
发布时间：2021-02-08 - 摘要：The objective is to compare the Chinese national standard and the Japanese agricultural standard for solid wood flooring.The differences between the two national standards in quality specifications are identified and analyzed.The result of this study could provide a reference for solid wood flooring production,trade,and standard revision.关键词：Solid wood flooring;standard;Chinese;Japanese
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- 230
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- 3
发布时间：2021-02-08
Discussion & Suggestion
- 摘要：After kerfing treatment along the longitudinal direction,boxed-heart larch lumbers was dried through a series of radio frequency vacuum drying schedules.We found that kerfing could considerably decrease surface checks and reduce the average length of surface check by 39%～50%.However,the kerfing treatment didn’t have any noticeable effects on the drying rate,moisture content distribution dryings or shrinkage.关键词：larch;radio frequency/vacuum drying;boxed-heart lumber;kerf treatment
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- 68
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- 4
发布时间：2021-02-08 - 摘要：High pressure water-jet cutting technique is increasingly visible in furniture and floor manufacturing process in China.In order to evaluate the surface quality and efficiency of extra-high pressure water-jet cutting,an orthogonal experiment was designed for three wood species to determine the effect of wood density,water pressure,feed-in speed,sand particle size,and cutting thickness on the surface quality.The test result would provide a useful reference to improve rare tropical wood flooring production.关键词：wood cutting;extra-high pressure;water-jet;roughness
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- 145
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- 4
发布时间：2021-02-08 - 摘要：Drying process is the key to improve the efficiency of utilizing expensive imported macaranduba wood for flooring products.An experiment was conducted to study the drying characteristics of macaranduba solid and their effect on the drying quality.A drying schedule for macaranduba wood was developed.The results showed that it took 28 days to dry 22 mm-thick macaranduba lumber from an average moisture content of 30.7 % to 12.3% to keep the qualified rate above 93%.
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- 85
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- 3
发布时间：2021-02-08 - 摘要：Circular saws are commonly used to process slabbed cant in China.However,most simple circular saws can not meet the demands for high recovery and processing precision.The authors designed a new numerically controlled double circular saw.The characteristic and performance of this saw were described in this article.关键词：conversion;double circular saw trimmer
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- 70
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- 2
发布时间：2021-02-08
Piactical Techniques
- Address：Box 29，Research Institute of Wood Industry, No. 1, Dongxiaofu, Haidian District, Beijing Postal code：100091
- Tel：010-62889419 Email：mckx@caf.ac.cn
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