最新刊期
      期 0 ， 2020
      • JIANG Zehui,WANG Zhaohui,FEI Benhua
        Issue 6, Pages: 3-5(2002) DOI: 10.19455/j.mcgy.2002.06.001
        摘要：This paper discusses the significance, design parameters and content for establishing new product standards for bamboo utilization in China. It also analyzes the status of the current standards and the need for international standardization, especially where bamboo products are used in construction. An experiment has been designed and completed which was developed around the National Bamboo Standards for both China and India. The results showed that the mechanical properties of bamboo were affected significantly by loading speed. Furthermore, the confusion of multiple bamboo standards is discussed and suggestions for future standard modification were made.  
        关键词：Bamboo utilization standards;International standardization   
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        发布时间：2021-02-08
      • JIANG Zehui1,LIU Junliang1,QIN Daochun1,YANG Xia2
        Issue 6, Pages: 6-9(2002) DOI: 10.19455/j.mcgy.2002.06.002
        摘要：Acacia, a fast growing tree species having good adaptability, is being widely used as a plantation crop in Southern China. Based on an analysis of its anatomical characteristics, natural durability, drying, pulping and woodbased panel properties, results indicate that Acacia wood is a suitable resource for papermaking, woodbased panels and solid wood furniture.  
        关键词：Acacia species;Wood properties;wood utilization   
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        发布时间：2021-02-08
      • XU Yonglan,HUA Yukun 
        Issue 6, Pages: 10-12(2002) DOI: 10.19455/j.mcgy.2002.06.003
        摘要：The effects of compression ratio, assembly type and reinforcement method on mechanical properties of Poplar laminated veneer lumber （LVL） were investigated. Among all the factors, the compression ratio was the most effective. Higher compression ratio resulted in higher modulus of rupture （MOR）, modulus of elasticity （MOE） and shear strength but less deflection related to creep. LVL assembled using thinner veneer on the face and thicker veneer in the core layers, as well as LVL made by resin impregnated veneer showed better mechanical properties. LVL with fiberglass reinforcement had less effective influence. The creep behavior of LVL was similar to that of wood. However, the instantaneous recovery of LVL specimens, measured after load removal, was less than the instantaneous deflection. Some assembly types mentioned in this paper could benefit LVL by increasing MOR and MOE as well as modifying creep behavior.  
        关键词：Laminated veneer lumber （LVL）;Compression ratio;Creep behavior;MOR;MOE   
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        发布时间：2021-02-08
      • BAO Fucheng1,ZHANG Shuangbao2,ZHAO Li2,CHEN Yongping2,GAO Li2 
        Issue 6, Pages: 13-15(2002) DOI: 10.19455/j.mcgy.2002.06.004
        摘要：Three different types of composite panels, representing different uses, were made using Poplar （Populus tomentosa Carr. triploid clone） and fiberglass as the primary raw materials and PF resin as the adhesive. Compared with common particleboard made with Poplar and PF resin, the physical and mechanical properties results indicated that the density （ρ）, modulus of rupture （MOR）, and modulus of elasticity （MOE） of the panels all improved. However, moisture content （MC） and internal bond （IB） strength both dropped slightly, while thickness swell （TS） was mixed with some specimens having results above the standard and others below.  
        关键词：Populus tomentosa;Wood-fiberglass panel;physical and mechanical properties;Composite effect   
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        发布时间：2021-02-08
      • WANG Ximing,XUE Zhenghua,SHI Lihui,ZHANG Weihua
        Issue 6, Pages: 16-19(2002) DOI: 10.19455/j.mcgy.2002.06.005
        摘要：Canada Poplar （Populus canadensis） and Manchurian Ash （Fraxinus mandshurica） wood were modified by microwave heating for various treating times. They were then dried together with similar untreated wood under the same drying conditions. Experimental results were based on electron microscope scans as well as data collected on drying speed and shrinkage measurements from modified and unmodified wood. The results showed, 1) some pit membranes of the treated wood were destroyed and some tylose were redistributed, or separated out after the microwave modification process, 2) the modified wood revealed better properties than the unmodified wood, especially the hardwood. The treated wood was found to have lower density, a larger shrinkage ratio, a higher water absorbing characteristic and a faster drying speed.  
        关键词：Microwave;wood modification   
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        发布时间：2021-02-08
      • ZHAO Dong1,CHEN Yuanchun2,GUO kangquan3
        Issue 6, Pages: 20-21(2002) DOI: 10.19455/j.mcgy.2002.06.006
        摘要：This experiment studied the influence of mold design on molding a cuppy product from maize stalk powder. The results showed that increasing the conical angle of the mold improved flowing and molding performance of the maize stalk powder. It was also found that a mold with a plane bottom and a round edge was more helpful than a mold without a round edge.  
        关键词：Maize stalk;Mould structure;Molding   
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        发布时间：2021-02-08
      • MA Xiaojun1,WANG Wenning2,YANG Cuixia2
        Issue 6, Pages: 22-24(2002) DOI: 10.19455/j.mcgy.2002.06.007
        摘要：This paper discusses the use of the woodworking relieving integratedformed milling cutter computer aided design （WRIFCAD） program to design a cutter for a milling machine that would be used for woodworking applications. The cutter has an integrated relief designed into it. The WRIFCAD system is based on the woodworking cutter design theory and was developed with the use of computer graphics. Detail is presented for each block of the system and the design process.  
        关键词：Woodworking;Formed milling cutter;CAD   
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        发布时间：2021-02-08
      • CAI Jiabin1,SUN Zhaobin2,LU Ruixin1
        Issue 6, Pages: 25-27(2002) DOI: 10.19455/j.mcgy.2002.06.008
        摘要：The drying characteristics of Rich Acaica（Acacia confusa） wood was investigated following the procedure described in the 100℃ test method. The drying rate was 0.32%/h and the drying duration lasted for 228 hours （9.5 days）. Performance test results showed that Rich Acaica belongs to the wood drying classification of "difficult to dry", yet this study demonstrated that the quality was capable of reaching the Chinese National Standard second grade level for sawn lumber drying.   
        关键词：Rich Acaica;100℃ test method wood;Drying characteristic;Drying technology   
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        发布时间：2021-02-08
      • LI Niancun,PENG Wanxi
        Issue 6, Pages: 28-30(2002) DOI: 10.19455/j.mcgy.2002.06.009
        摘要：A new kind of acidderesination agent was developed to treat Masson’s Pine （Pinus massoniana） boards （500 mm×200 mm×55 mm ）, a fast growing plantation species. The boards were treated under a low temperature and low wood to solution ratio. Compared with untreated board, the results showed that treated boards retained their original color. However, there was a small decrease in other physical and mechanical properties of boards. The treated wood is suitable as furnishing and furniture materials.  
        关键词：Plantation forest;Pinus massoniana;Acid deresination   
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        发布时间：2021-02-08
      • LU Wenhua,ZHAO Guangjie
        Issue 6, Pages: 31-34(2002) DOI: 10.19455/j.mcgy.2002.06.010
        摘要：The current status of fireretardant treated wood and wood composites, both domestic and imported, are reviewed in this paper. The types of fireretardant and their characteristics, as well as application, treating technology and testing methods for fireretardant products, are also presented. Finally, the development trends of fireretardant treated wood and wood composites are discussed.  
        关键词：Wood composites;Fire-retardant;Treatment technology;development trend   
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        发布时间：2021-02-08
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