最新刊期
期 0 ， 2020
- 摘要：After reviewing the current status of the wood industry in China, the author stresses that it is critical for the Chinese wood processing companies to build their own raw material bases and to adjust production towards economic scales. He also suggests that the Chinese wood （products） manufacturers use information technology to develop diversified products, adopt modern （management） skills and establish brand names, so as to expand both domestic and international markets and to attain a sustainable and sound industry.关键词：wood industry;development;Raw material;Management;Brand
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发布时间：2021-02-08 - 摘要：Specimens of Poplar （Populus xeuramericana Guinier CI.’San Martino’ and P. Deltoides Bartr CI.’Lux’） and Chinese Fir （Cunninghamia lanceolata） were measured and weighed. They were then impregnated with PF resin, surface compressed and then again measured and weighed. The results showed that with the increase in resin concentration, the weight percent gain （WPG）, anti-shrink efficiency （ASE） and moisture excluding efficiency （MEE） of the treated wood increased proportionally, while its tangential and radial shrinking ratio decreased. When the resin concentration was lower, the changes of all the above indexes appeared more pronounced and tended to be stable until a certain level. The compression deformation recovery rate of the treated wood was slight when the resin concentration exceeded 10%, which meant that the compressive （deformation） was almost constant for wood.关键词：Phenol-formaldehyde （PF） resin;Surface-compressive wood;dimensional stability;Compressive deformation
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发布时间：2021-02-08 - 摘要：This paper introduces a new processing method for hardwood log veneer based on a computed tomography （CT） image. The process mainly involves log CT scanning, CT image （processing,） 3-D reconstruction of the log on a computer, simulated flitch slicing, and a virtual （display） of veneer. The application of the process and the benefits of the method are described. It （also） （analyzes） the possibility of applying a CT machine to the wood processing industry. Results showed that the method could be an efficient way to help operators with decisions on log sawing and flitch （slicing.）关键词：Log;Computerized tomography（CT） scanning;Image processing;3-D reconstruction;Simulation;Flitch slicing;optimization
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发布时间：2021-02-08 - 摘要：The deformation of a hydraulic-clamping-sleeve wall was analyzed in this paper by （applying） the theory of "Thick-walled Cylinder" and "Thin-walled Cylinder". A formula was derived to calculate the thickness of the hydraulic clamping sleeve. Three different specifications for it were designed and tested. By measuring deformation and load, it was indicated that the hydraulic （clamping） sleeves could meet the designed requirement. The formula was able to be utilized in （designing） the hydraulic clamping sleeves.关键词：Woodworking tooling;Hydraulic clamping sleeve;Wall deformation
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发布时间：2021-02-08 - 摘要：The preparation of an adhesive is a lengthy, nonlinear and time-varying process with big inertia and pure delay. The author designed an intelligent control system by combining Smith pre-estimate control with fuzzy logic to help understand and develop better control of the process. The theory of Smith pre-estimate control, its structure and application, are presented in this paper. The simulation results indicate this control system is efficient and can be adopted in an adhesive preparation process.关键词：adhesive;Fuzzy algorithm;Smith pre-estimate control
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发布时间：2021-02-08 - 摘要：For expanding a new way to use wheat straw, the authors conducted an orthogonal （experiment） in order to determine the feasibility of making wheat straw-plastic composites. In this （paper,） the hot-reaction characteristics of wheat straw, plastics （PE, PVC, EVA） and three kinds of wheat straw-plastic composites were examined by Differential Scanning Calorimetry method （DSC）. DSC curves of the monomer and composite materials revealed the distinctions between them, which indicated that some chemical reactions had happened between the wheat straw and the plastic. The paper further analyzed the effects of experimental factors, such as the plastic types, size of wheat straw powder and the ratio of wheat straw to plastic, on the tensile strength of the composite. These results provided references for researching technology for wheat straw-plastic composites.关键词：wheat straw;Plastic;Hot reaction;Composite technology
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- 113
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发布时间：2021-02-08 - 摘要：Five typical timber drying kilns, including two end-fan kilns, two side-fan kilns and one short-axle kiln, were selected to test their circulation velocities. The results showed that the circulation property for the medium velocity in the short-axle kiln was best. Reversible （circulation） was necessary to improve the uniformity for timber drying.关键词：Timber drying kiln;Circulation Velocity;Reversible circulation
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发布时间：2021-02-08 - 摘要：The effects of the number, length and width of the slots on the thermal deformation of a circular sawblade were investigated in this paper. Results found that under the same condition, a circular sawblade with 5 slots showed the best thermal stability. It was also found that increasing the length of the slots tended to make the sawblade more stable, whereas increasing the width of slots resulted in increased thermal deformation.关键词：Circular sawblade;Slot;Thermal deformation
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发布时间：2021-02-08 - 摘要：Domestically manufactured wood-based panel equipment has played an important role in the （wood-based） panel industry in China. This paper first briefly reviewed the progress in the wood-based panel equipment manufacturing industry in China. Then, it analyzed China’s current （manufacturing） industry for plywood, particleboard and medium density fiberboard equipment, （respectively,） in comparison with other advanced countries. Finally, taking the SUFOMA Company as an example, whose technology level and products are taking the first place in China, the paper summarized its achievements and concluded by suggesting some ways to make further improvements for the Chinese manufacturers.关键词：Wood-based panels （WBP）;Domestic production lines;Current situation
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发布时间：2021-02-08 - 摘要：Methods for measuring African Padauk logs, according to the ATIBT （Association Technique Internationale des Bois Tropicaux） Standard and the Chinese National Standard, are （described） in this paper. Due to the differences between the two standards, the calculated volumes of African Padauk logs, when based on the Chinese National Standard, are bigger than when calculated on the ATIBT Standard. The reasons that cause the increase in volume are discussed. Further analysis was focused on the relation between the diameter of one log and its increasing volume with the two standards. Results found that the rate of the increase in volume decreased as the diameter of the log increased. Thus, using the diameter of a log and the regression method, an exponential function, the increasing volume is able to be calculated. The authors suggests that it could be used to predict the volume difference of logs between ATIBT and the Chinese National Standards.关键词：African Padauk log;ATIBT Standard;Chinese National Standard;Volume of log
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发布时间：2021-02-08 - 摘要：A new kind of parquet, overlaid with alumina faced paper, was presented in this paper. The paper was impregnated with melamine resin. While some nanometer crystalline titania and nano-inorganic silver antimicrobial compound was added into the melamine resin, it was found that the parquet overlaid with the impregnated paper showed good resistances to staphylococcus, （Escherichia） coli and aspergillus niger. Its wear resistance was also better than the common （solid-wood） flooring and laminated wood floorings.关键词：Antibiosis;Wear resistance;Nanometer crystalline titania;Nano-inorganic silver (antimicrobial;) Alumina faced paper
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发布时间：2021-02-08 - 摘要：Requirements for drying high quality wood for use in musical instruments are very strict. With Chinese Fir （Picea asperata） lumber, which is to be used as the surface material for （violins,） a series of drying tests were conducted, with a small-sized dehumidification kiln made by the Kilnshine Co., at CRIWI, Chinese Academy of Forestry. Results showed that no surface or （internal） checks occurred in the dried lumber and the moisture content difference within stack was low. However, a moisture content gradient occurred along the thickness direction but could be （balanced） after about a week. The drying cost was around 100 yuan/m3. The dried wood retained its original color and sound property, and so could be used to make musical instruments. It was （concluded） that with a reasonable drying schedule and stacking method, the dehumidification kiln was applicable and could be used to dry different sizes of instrumental wood materials together.关键词：Dehumidification drying;Wood materials for musical instrument use;Small-sized （dehumidification） kiln
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发布时间：2021-02-08
- 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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