最新刊期
      期 4 ， 2017
      • ZHONG Yong,REN Hai-qing,WU Guo-fang,ZHOU Hai-bin,ZHAO Rong-jun,XING Xin-ting
        Vol. 31, Issue 4, Pages: 5-9(2017) DOI: 10.19455/j.mcgy.20170401
        摘要：Bending strength（MOR） of Chinese larch（Larix gmelinii） dimension lumber（grades Ic, IIc, IIIc and IVc for 40 mm × 90 mm × 4 000 mm） was obtained by full-size bending tests. Optimal probability distribution model for the MOR was investigated by the least square method. According to reliability theory, design values for MOR of dimension lumber with different grades were then determined. The goals of this study were to improve determination method for design values of dimension lumber strength and to provide scientific basis for safety design and reasonable application in wood building structures.  
        关键词：Chinese larch;dimension lumber;full-size;bending strength;design value;reliability theory   
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        发布时间：2021-02-08
      • ZHU Jun,LIU Xin-yu,WU Jun-hong,MIAO Hu,QU Guo-fu,SHENG Zhen-xiang
        Vol. 31, Issue 4, Pages: 10-13(2017) DOI: 10.19455/j.mcgy.20170402
        摘要：The authors developed a real-time database based on an SQL Server to solve problems of poor real-time storage and ineffective utilization of data from a continuous press panel production line. Therefore, the data storage and query, storage and application of the process parameters as well as retrospective query of the fault data were all realized. Implementation plans for information interaction between the control systems and the management systems in wood-based panel companies were presented with the real-time database technology.  
        关键词：wood-based panels;continuous press;real-time database;InTouch;production management system   
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      • WEI Ya-nan,ZHANG Ya-hui,ZHANG Ya-mei,QI Yue,YU Wen-ji,LI Chang-gui
        Vol. 31, Issue 4, Pages: 35-38(2017) DOI: 10.19455/j.mcgy.20170408
        摘要：The authors made scrimber samples with impregnated poplar veneer at different moisture contents（8%,12%,16%,20%） to evaluate the effects of veneer moisture content on heat transfer and properties of the scrimber samples. The results showed that the maximum temperature in both surface and core layers, as well as heating rate of the scrimber with the same densities, all decreased when the moisture content increased. When the moisture content was around 12%, wettability, surface roughness, water resistance and bending strength of the scrimber samples reached the highest.  
        关键词：scrimber;veneer;moisture content;surface characteristics;mechanical properties   
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      • Vol. 31, Issue 4, Pages: 47-48(2017)
        摘要：<正>根据国家林业局林业行业标准制修订计划,2017年林业行业标准制修订项目计划共计有190项,中国林科院木材工业研究所承担14项。包括:1)人造板标准7项:其中《仿古木质地板》、《船用贴面刨花板》、《铁路客车用胶合板》等修订标准项目3项;《木质集成家居安装、验收和使用规范》、《木质集成家居部件制造通用技术要求》、《负离子功能人造板及其制品通用技术要求》制定标准项目3项;《木地板标准英文版》翻译1项;2)木材标准4项:《防腐木材产品标识》、《废  
          
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        发布时间：2021-02-08
      • Vol. 31, Issue 4, Pages: 48-49(2017)
        摘要：<正>由国家林业局林产规划设计院、宁波中科朝露新材料有限公司、福人集团有限责任公司共同组成专家团队,历时2年,对大豆胶黏剂制造刨花板的关键技术进行科技攻关,取得重大进展,实现大豆胶刨花板的规模化生产,产品批量投入市场。豆胶由宁波中科朝露新材料有限公司率先在国内产业化应用,现已被大规模应用于实木复合地板、胶合板、细木工板等产品的生产。但利用豆胶制造刨花板一直处于试验阶段,尚无产品问世。原因是刨花施胶后初黏性差、热压时间长,且在连续平压  
          
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      • Vol. 31, Issue 4, Pages: 49(2017)
        摘要：<正>作为人造板行业的火灾预防系统的市场领导者,格雷康携最新一代火花探测系统亮相2017德国汉诺威国际木工机械展览会（Ligna）。展示面积超过200 m2,展台设计以中纤板为主打结构。展会期间,现场设置了模拟管道、探头、喷水等装置,演示了火花进入管道后如何被快速探测和熄除的过程。新研发的多种火花和温度探测装置也引起了观众的广泛关注。同期,格雷康还重点推出了用于人造板等行业  
          
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      • Vol. 31, Issue 4, Pages: 51-52(2017)
        摘要：<正>"全国人造板工业发展研讨会"已连续成功举办了15届,成为最具规模与影响的标杆性行业年度盛会。"第十六届全国人造板工业发展研讨会"定于2017年9月21-23日在山东临沂举办,同期举办"第四届世界人造板大会"和"第八届中国临沂国际木业博览会"。临沂是中国最大的人造板产业集群地,被中国林产工业协会授予"中国板材之都"称号。本次会议将邀请相关部委及协会领导、国际组织代表、行业权威、专家学者和知名企业家共谋行业发展大计。现诚邀国内外人造板生产企业,人造板装备制造、胶黏剂与涂料生产、人造板二次加工及地板、木门、橱柜、家具制造等相关单位的业内人士莅临会议。  
          
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        Research & Development

      • YUAN Quan-ping,LIANG Shan-qing,FU Feng
        Vol. 31, Issue 4, Pages: 14-18(2017) DOI: 10.19455/j.mcgy.20170403
        摘要：The authors developed an electric heating composite with carbon fiber paper as the electric heating material and fiberboard as the substrate glued with melamine modified urea-formaldehyde adhesive. Influences of hot-pressing pressure and glue spread on the composite properties, including drop rate of resistance（DRR）, micro conductive structure and internal bonding strength, were evaluated. Results showed as the glue spread increased, lap interfaces between carbon fiber in electric heating layers were affected with a linear decline relationship and DRR from 24% to 40%. Considering internal bonding strength of the composite, optimum parameters were determined to be 0.8 MPa pressure and 130 g/m2 double-faced glue spread.  
        关键词：carbon fiber;electric heating;fiberboard;drop rate of resistance（DRR）;internal bonding strength   
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        发布时间：2021-02-08
      • XIAO Rui-chong,CHEN Yu-he,BAO Yong-jie,HUANG Cheng-jian
        Vol. 31, Issue 4, Pages: 19-23(2017) DOI: 10.19455/j.mcgy.20170404
        摘要：Four kinds of adhesives were selected to prepare bamboo-wood thermoelectric composites. Electrifying tests for the composite samples were conducted under electric power 160 W/m2 for 12 weeks while the aging performances of the samples were evaluated every two weeks. The results showed that: 1) when electrifying testing time increased, electrical resistance of the four kinds of composite samples declined with decreased weight and gloss as well as increased total color difference; 2) dimensional stability and longitude warp met with relevant standard requirements. Immersion performance of the composite samples met with relevant standard requirements except the one glued with aqueous isocyanate adhesive. Electric resistance of the composites glued with phenolic resin adhesive declined the least with good time-temperature effect.  
        关键词：bamboo-wood thermoelectric composite materials;electrifying;aging performance;stability   
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        Discussion & Suggestion

      • YANG Xue-bing
        Vol. 31, Issue 4, Pages: 24-27(2017) DOI: 10.19455/j.mcgy.20170405
        摘要：The author introduced current status of multi-storey and high rise timber structures in both foreign countries and China. He also explained the main technical contents of the Chinese National Standard GB/T 51226 for multi-storey timber structures.  
        关键词：multi-storey and high rise timber structures;Chinese National Standard   
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      • FU He-long,WANG Zhong-min,MA Wen-jun,LIAO Shi-rong
        Vol. 31, Issue 4, Pages: 28-31(2017) DOI: 10.19455/j.mcgy.20170406
        摘要：Wood structure has been developing rapidly in China. Based on the CNKI database, research papers on wood structure published in China in the last 20 years were collected and analyzed using the bibliometric method. The analysis focused on annual publishing amount, source periodicals, authors/institutions, fund sources, keywords and highly-cited papers. This analysis resulted in revealing wood structure research development procedures, main source periodicals,main research institutions, main experts, main fund sources and main research hot points, to provide reference for further research and development of wood structure in China.  
        关键词：CNKI;wood structure;literature research;bibliometrics   
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      • GAO Xing,LI Min,GAN Xue-fei,HENG Li-chen,SHEN Wei-ping,GAO Ming-ming
        Vol. 31, Issue 4, Pages: 32-34(2017) DOI: 10.19455/j.mcgy.20170407
        摘要：To investigate effects of moisture content in medium density fiberboard（MDF） on mechanical properties, six groups of MDF samples with different moisture content were prepared and mechanical properties of the boards were then tested. The results showed that moisture content could influence internal bond strength, MOR, MOE and surface bond strength of the boards. When moisture content was 6%, the mechanical properties reached the maximum.  
        关键词：MDF;moisture content;mechanical properties;effects   
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        Piactical Techniques

      • PENG Xiao-rui,ZHANG Zhan-kuan
        Vol. 31, Issue 4, Pages: 39-42(2017) DOI: 10.19455/j.mcgy.20170409
        摘要：The authors prepared red oak veneer reinforced with low density polyethylene films as a face material to be overlaid on high density fiberboard（HDF）. Response Surface Method was used to optimize the finishing process. The results showed that surface bond strength of the overlaid HDF samples was significantly affected by not only hot pressing temperature and pressure, but also interaction effects between hot-pressing time and pressure as well as jointed effects between hot-pressing temperature and time. Under the optimized process conditions, such as 1 MPa hot-pressing pressure and 130 ℃temperature under 3 minutes duration, the surface bond strength of the overlaid HDF samples reached 1.60 MPa, which met the requirement of the National Standard GB/T 15104-2006 "Decorative Veneered Wood-based Panels".  
        关键词：low density polyethylene film;reinforced decorative veneer;high density fiberboard（HDF）;overlay;Response Surface Methodology（RSM）;surface bond strength   
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      • TANG Wen-xiu,LIU Kai-wei,SUN Li-ping,WANG Hai-gang
        Vol. 31, Issue 4, Pages: 43-46(2017) DOI: 10.19455/j.mcgy.20170410
        摘要：Parameters of a proportion-integral-derivative（PID） controller were adjusted online with fuzzy inference and a particle swarm optimization（PSO） algorithm were applied to the fuzzy PID controller to adjust the inertia weight coefficient and optimize quantitative factors and controller parameters. Then the fuzzy PID controller, optimized by the PSO algorithm, was applied to the barrel temperature control of the extruders for wood-plastic composites（WPC）. Results showed that the optimized fuzzy PID controller could increase heating rate, reduce overshoot, shorten adjustment time, enhance anti-jamming capability and effectively improve control effects of the barrel temperature. Tensile strength and production efficiency of the WPC panels were improved significantly.  
        关键词：wood-plastic composites;extruder;barrel temperature;particle swarm optimization;fuzzy PID;performance   
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