最新刊期
      期 3 ， 2019

        Research & Development

      • ZHAN Man-jun,CHEN Zhi-lin,CHU Fu-xiang
        Vol. 33, Issue 3, Pages: 1-4(2019) DOI: 10.19455/j.mcgy.20190301
        摘要：Ultra-low density flame-retardant fiberboard samples were manufactured with isocyanate（PMDI） resin and P-N-B flame-retardants. Effects of hot pressing temperature, pressing time, PMDI dosage and flame-retardant dosage on properties of the fiberboards were investigated.Test results showed that mechanical properties of the samples were enhanced with increase of pressing temperature and time as well PMDI dosage, while 24 h thickness swelling（TS） of the samples presented a decrease trend with unchanged oxygen index（OI）. But the mechanical properties of the samples were getting poor with increase of flame-retardant dosage, while oxygen index of the samples enhanced.Mechanical properties and flame-retardant properties of the samples made with optimized manufacturing technology could meet the requirement of LY/T 1718-2017 standard and B1-C grade requirement of GB8624-2012 standard, respectively.  
        关键词：ultra-low density fiberboard;flame-retardant;isocyanate resin;property;oxygen index（OI）   
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        发布时间：2021-02-07
      • ZHU Jing-yang,GUO Xu-jian,WANG Ning,SUN Hong-yu,YUAN Na-xin
        Vol. 33, Issue 3, Pages: 5(2019) DOI: 10.19455/j.mcgy.20190302
        摘要：<正>PressMAN人造板热压监控系统,由加拿大PressMAN技术有限公司研发。用途:1)监测中/高密度纤维板、刨花板、定向刨花板和非木质人造板板坯的芯层温度和气体压力动态变化;2)观测热压板/钢带长度/宽度方向的温度分布;3)观测木材干燥过程温度和蒸汽压的动态变化。优势:1)科学制定和优化热压工艺参数,提高生产率,降低生产成本;2)合理设定闭合和卸压时间,以实现预定剖面密度,减少或消除鼓泡和分层等质量缺陷;3)量化工艺参数对热压过程的影响,优化工艺,减少温室气体排放,节能减排;4)连续  
        关键词：cassava straw powder;polypropylene carbonate(PPC);composites;mechanical properties;powder size   
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        发布时间：2021-02-07
      • SHI Yuan,LU Wen-hua,WANG Xue-yu
        Vol. 33, Issue 3, Pages: 9-13(2019) DOI: 10.19455/j.mcgy.20190303
        摘要：A compound composed of urea-formaldehyde resin（MUF） and red acid G dyeing solutions were developed and used to treat Chinese Fir（Cunninghamia lanceolate） wood samples, aiming to improve both mechanical and decorative properties of the wood. Color, bending strength and machining performances of the modified wood samples were tested and evaluated.Results showed that the wood samples had uniform and saturated color with good fastness. Density,modulus of elasticity, bending strength and compressive strength of the wood samples increased by 60.7%,48.5%, 95.7% and 83.2%, respectively, compared with the controls. All machining performances including planning, sanding, drilling, milling, mortising and turning were improved significantly. Comprehensive evaluation value of the wood samples reached excellent grade.  
        关键词：Chinese fir wood;modification;reinforcement by resin impregnation;dyeing;performance   
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        发布时间：2021-02-07
      • LIU Bo,WU Rui-dong,LU Yun,ZHANG Mao-mao,JIANG Xiao-mei,YIN Ya-fang
        Vol. 33, Issue 3, Pages: 14-17(2019) DOI: 10.19455/j.mcgy.20190304
        摘要：To assist rapid and accurate identification of Pterocarpus species, interspecies differences and differences between heartwood and sapwood in wood fluorescence properties of 6 Pterocarpus species were studied.Results showed that the interspecies differences and differences between heartwood and sapwood of wood fluorescence properties of Pterocarpus species were significant. Through fluorescence spectrum detection,the quantitative indexes such as fluorescence intensity and the qualitative indexes such as fluorescence color are comprehensively considered. P. santalinus and P. tincrorius could be accurately determined. At the same time, P. angolensis could be discriminated from P. marsupium, P. erinaceus and P. soyauxii.Qualitative and quantitative standardization detection of wood fluorescence properties could be an assistant method to improve identification level of Pterocarpus species.  
        关键词：Pterocarpus species;wood fluorescence properties;detection;interspecies differences;heartwood and sapwood   
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        发布时间：2021-02-07
      • GUO Hui,SHENG Zhen-xiang,WANG Xiao,LIU Chuan-ze,ZHOU Yu-cheng,YUE Qun-fei
        Vol. 33, Issue 3, Pages: 18-22(2019) DOI: 10.19455/j.mcgy.20190305
        摘要：An automatic system based on machine vision technology was developed for detecting surface defects of particleboard. The system was mainly composed of an industrial camera which was used for acquiring panel images and a defect detection algorithm which was implemented by C++, OpenCV,JAI SDK class library and MFC multithreading technology. The system communicated with production line control systems through computer serial ports. Test results showed that the system operated stably with a high accuracy in locating surface defects and was flexible in parameters configurations. Both of defect detection effects and operation speed of the system could meet requirements of on-line inspection for continuous press production lines.  
        关键词：surface defect;detection;machine vision;multithreading;continuous press production line   
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        发布时间：2021-02-07

        Discussion & Suggestion

      • XIANG Qin,BAI Xiu-ping
        Vol. 33, Issue 3, Pages: 23-27(2019) DOI: 10.19455/j.mcgy.20190306
        摘要：The authors introduced main changes in production scale and raw materials supply aspects recently happened in sawn timber, plywood, glulam and wood chip industries in Japan. In the 21 st century,wood industry in Japan presented an up-grading trend with unexpected growth of domestic forest resources,which greatly promoted raw material supply transition from imported timber to domestic timber from plantation forests in Japan.  
        关键词：Japan;wood industry;sawn timber;plywood;glulam;material composition;transformation   
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        发布时间：2021-02-07
      • YU Hua-qiang
        Vol. 33, Issue 3, Pages: 28-31(2019) DOI: 10.19455/j.mcgy.20190307
        摘要：China national standards on testing methods of wood physical and mechanical properties were compared with relevant standards issued by the International Organization for Standardization（ISO）.Differences between the two series of standards in composition and technical requirements were analyzed to provide a reference for China national standard revision.  
        关键词：Chinese national standard;ISO standard;physical and mechanical properties;testing method   
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        发布时间：2021-02-07
      • HAN Jing,WU Zhi-hui
        Vol. 33, Issue 3, Pages: 32-35(2019) DOI: 10.19455/j.mcgy.20190308
        摘要：In order to improve uncertainty, constraint and precision of production planning and scheduling for customized panel furniture companies, the authors proposed a solution of process level real-time scheduling and workshop level order distribution control. Based on an analysis of process load and equipment capacity, a real-time scheduling algorithm was developed to adjust relationship between the capacity and the load in time. The order allocation control algorithm was used to calculate the load of producing orders and granted orders and to decide whether new orders, urgent insertion orders and extra orders were needed. Application of the production planning and scheduling in a panel furniture production line showed significant improvement in production flexibility and efficiency.  
        关键词：customized panel furniture;manufacturing execution system（MES）;production planning and scheduling;real-time scheduling;order releasing control;algorithm   
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        发布时间：2021-02-07
      • LU Wen-lei,HE Tian-xiao,GENG Xiao-jie
        Vol. 33, Issue 3, Pages: 36-40(2019) DOI: 10.19455/j.mcgy.20190309
        摘要：Application of virtual reality and eye tracking technology in product design were summarized and analyzed with respective advantages and disadvantages of the two methods. Necessity and feasibility of combinating these two technologies into furniture design were discussed by introducing characteristics,categories and utilization of the combination to provide new ideas and technical support for furture furniture design.  
        关键词：furniture design;virtal reality technology;eye tracking technology   
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        发布时间：2021-02-07
      • ZHOU Yong-dong,GAO Xin,FU Zong-ying,ZHOU Fan,DOU Qing-qing
        Vol. 33, Issue 3, Pages: 41-44(2019) DOI: 10.19455/j.mcgy.20190310
        摘要：A series of drying experiments of imported Mahogany lumber in 25 mm thickness were conducted according to a conventional schedule in a company. Then the conventional schedule was optimized based on analyses of drying rate and drying quality of the lumber tested.Comparison between the optimized and conventional schedule showed that not only the drying time was shortened from 12 days to 6 days, but also quality grade of the dried lumber was improved from the 3rd to the 2nd according to China national standard GB/T 6491-2012, which could meet the requirements for making solid wood furniture and solid wood flooring et al.  
        关键词：imported Mahogany lumber;conventional drying;drying quality;drying efficiency;optimization   
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      • ZHOU Yong-dong,GAO Xin,FU Zong-ying,ZHOU Fan,HOU Jun-feng,WENG Xiang
        Vol. 33, Issue 3, Pages: 45-48(2019) DOI: 10.19455/j.mcgy.20190311
        摘要：Based on technical investigation and analysis of drying practices in a few lumber drying companies, an optimized conventional drying schedule and a high temperature drying schedule were developed for 50 mm thick imported radiata pine lumber to improve drying quality and efficiency.The results showed that drying time was significantly shortened by using the optimized conventional schedules, and quality of the kiln dried lumber met the 2nd grade requirements of China national standard GB/T 6491. The drying time was shortened from 10.75 days with conventional drying schedules to 6.20 days with the optimized conventional drying schedule, and was further decreased to 3.69 days with a high temperature drying schedule, resulting in significantly improved drying efficiency. The high temperature drying schedule was recommended for high temperature drying kilns so as to further improve drying efficiency.  
        关键词：imported lumber;radiata pine;conventional drying;high temperature drying;drying schedule;efficiency   
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        发布时间：2021-02-07
      • DING Ding-cheng,LIU Kun-jian,LI Pei,LIU Jun-huai,YUAN Jian,LIU Ke-fei,WU Qing-ding
        Vol. 33, Issue 3, Pages: 57-58(2019) DOI: 10.19455/j.mcgy.20190314
        摘要：采用温压成形原理与技术,制备竹粉-超高分子量聚乙烯（UHMWPE）复合滑动轴承,并分析其制备关键技术与创新点。结果表明,制备的竹粉-超高分子量聚乙烯复合滑动轴承压溃强度高、摩擦系数小、自润滑效果好,可替代烧结青铜滑动轴承用于机械设备,也可替代木材层积塑料或天然铁梨木滑动轴承,用于船舶艉管或水轮机系统。  
        关键词：竹粉;超高分子量聚乙烯;复合滑动轴承   
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      • Vol. 33, Issue 3, Pages: 59-60(2019)
        摘要：<正>由中国林产工业协会、中国林科院木材工业研究所、广东省林科院、北京林业大学联合主办的"2019年全国木材保护与改性产业发展论坛",2019年4月在北京成功召开。本届会议以"聚势谋远创新发展"为主题,汇聚了全国木材保护与改性相关行业的产、学、研代表到会。来自国家林业和草原局调查规划设计院、中国林科院科信所、中国林科院木材工业研究所、东北林业大学、北京林业大学、广东省林业科学研究院、香港中文大学、北京盛大华源科技有限公司、广东  
          
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        Piactical Techniques

      • TANG Qi-heng,CHANG Liang,WANG Shuang-yong,GUO Wen-jing
        Vol. 33, Issue 3, Pages: 49-52(2019) DOI: 10.19455/j.mcgy.20190312
        摘要：High density fiberboard samples（HDF） made of Eucalyptus wood were manufactured using isocyanate resins. Influences of panel densities on mechanical properties and thickness swelling of the HDF were analyzed. The results showed that main properties of the HDF were improved significantly with increase of panel densities, which would greatly benefit to development of high performance fiberboard products.  
        关键词：fiberboard;high density;mechanical properties;thickness swelling   
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      • HUANG Yu-xiang,LIN Qiu-qin,ZHANG Ya-hui,LI Xing-de,YU Wen-ji
        Vol. 33, Issue 3, Pages: 53-56(2019) DOI: 10.19455/j.mcgy.20190313
        摘要：Bending properties of bamboo laminates composed of two layers of unjointed bamboo strips and one layer of lengthwise jointed bamboo strips with 3 kinds of joint types under lateral pressing were tested. Then properties of bamboo laminates composed of different layers unjointed bamboo strips and one layer of lengthened bamboo strips with hook joints were further determined.The results showed that the bending strength of the bamboo laminates with jointed bamboo strips was slightly reduced without significant difference among joint types. When the jointed bamboo strip was laid in the middle of the bamboo laminates composed of more than 3 layers of bamboo strips, layer number of bamboo strips had little effects on bending properties of the bamboo laminates.  
        关键词：bamboo laminates;joint types;lateral pressing;bending properties;laminated bamboo lumber   
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