最新刊期
      期 0 ， 2020
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.011
        摘要：一种新型的木材数据处理机郁昊（南京林业大学南京２１００３７）１引言多少年来，木材的材积都是通过查表获得的，工作繁琐，易出错，效率低。随着电子计算机的发展，人们开始运用通用计算机来进行计算、管理。但是系统微机价格较高，并需要专门的技术人员，所以难以普及...  
          
        3
        |
        7
        |
        0
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351817 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.005
        摘要：he paper deals、with the wood dimensional stability of three spe-cies,Pinus massoniana,Quercus acutissima,and Aluns trabecu’osa,treated with polyethylene glycol(PEG).The optimum treatment conditions were found from tho experiment.The dimensional stability of、wood treated with PEG was satisfactory.After a period of natural storage,the antishrink efficiency of treated wood was more than 80%and the decay rcsistance of the wood was also proved.  
        关键词：Polyethylene glycols;dimensional stability;Antishrink efficiency   
        3
        |
        139
        |
        12
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351833 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.013
        摘要：中密度纤维板的市场趋势李华富译中密度纤维板（ＭＤＦ）在５０年代诞生于美国，在７０年代得到了飞跃的发展，到８０年代扩展到了世界各地。表１所示是１９８０年和１９９０年世界ＭＤＦ生产能力的增长情况。表中包括正在运行的老厂和在建的新厂，但并不能确切说明目前的...  
          
        3
        |
        27
        |
        0
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351845 false
        发布时间：2021-03-12
      • Issue 2, (1994)
        摘要：关于改善我国制材工业的建议全国第八次制材学术讨论会的代表认为：北方不少大中型制材企业面临停产、半停产，大幅度亏损的危困趋势，分析原因，寻求对策，建议如下：１．改革企业内部管理制材企业目前的管理水平还比较低，经营还比较粗放，企业多数设备还没有很好地利用...  
          
        2
        |
        73
        |
        0
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351852 false
        发布时间：2021-03-12
      • Shi Jianping
        Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.008
        摘要：In this paper,It、vas discussed and analyzed that the factors ofdetermining design properties of strength and elasticity for structural partic-Ieboard. According to the variation of properties of local particleboard pro-ducts, the value of strength safety factor and minimum property values were recommended.  
        关键词：particleboard;Allowable stresses;Variation;Safety factor   
        5
        |
        28
        |
        0
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351854 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.010
        摘要：人造板压机的电液伺服系统张群（中国林科院木材工业研究所北京１０００９１）人造板热压过程中需要控制的参数有压力、板厚、升压速度、闭合速度和温度等。这些参数除温度外，都能用电液伺服系统控制。根据热压过程对这些参数的控制要求而研制的电液伺服系统，就是人造板...  
          
        4
        |
        60
        |
        3
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351867 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.012
        摘要：防止马尾松木材蓝变的技术措施欧阳明八，何显进（中国林科院木材工业研究所北京１０００９１）（广西宁明木材厂宁明５３２５０１）马尾松边材色泽素白，纹理美观，强度适中，是我国南方主要用材树种，但马尾松木材在存放过程中易发生蓝变。刚采伐的松木，含水率达１００...  
          
        4
        |
        75
        |
        20
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351875 false
        发布时间：2021-03-12
      • Zheng Quanlian
        Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.007
        摘要：The main consideration on the design of laboratory hot press is de-scribed in regard of both the hydraulic and control system,Parameters,such aspressure,pressing speed,speed control and heating method,are discussed inthe design of hydraulic system. The emphasis in the design of control system is put on the PLC and the computer control technology.  
          
        6
        |
        100
        |
        4
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351885 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.006
        摘要：In this article,the technology of softening wood with chemicals was mainly discussed.By the experiments,2 species of wood and the relatedtreating process were selected.The treating effect、was further studies by de-termining the chemical compositions of untreated and treated wood as well asthe bending stability of treated wood.The resutls showed:①the concentrationof the chemical solution of 5%～6%,the temperature of 40℃ and the treatingtime of 20～24 hr.were suitable for softening wood; ②the dimension of treat─ed wood was unchanged under normal application conditions.  
          
        5
        |
        549
        |
        26
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351895 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.009
        摘要：木质纤维复合材料──一种有发展前景的复合材料王恺（中国林科院北京１０００９１）木质纤维复合材料（ｗｏｏｄｆｉｂｅｒｃｏｍｐｏｓｉｔｅｓ）指水质纤维与合成纤维施以一定数量的树脂和其它添加剂结合而成的一种新型材料。通称木质纤维板坯（ｗｏｏｄｆｉｂｅｒｍａ...  
          
        3
        |
        274
        |
        39
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351907 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.003
        摘要：In this article,the combined effect of the fiber-pulp- treatment and hot- pressing on the properties of hardboard were studied The relation of sizing methods to product quality were also examined There、was close rela-tionship between mat moisture content before resin sprcading and resin reten-tion,The solid content of resin used should bo controlled according to diffe-rent mat moisture content.  
        关键词：Hardboard;Fiber-pulp-treatment;Spreading method;Bendingstrengt;water absorption   
        3
        |
        29
        |
        5
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351913 false
        发布时间：2021-03-12
      • Chen Guangqi
        Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.001
        摘要：The microdistribution of UF resin plywood was determinated withscanning electron mieroscopy coupled with energy dispersive X-ray analysis(SEM-EDAX),and possibility of thiourea as the label was also discussed.The results showed that:the properties of UF resin in which part of urea had beensubstituted by thiourea were similar to those of commercial UF resin.The SEM-EDAX technique provided semi-quantitative information of UF resin mierodist-ribution with relatively high accuracy.  
        关键词：Mierodistribution of UF resin;Label;SEW-EDAX;Glueline;(P-B)/B ratios   
        4
        |
        54
        |
        3
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351785 false
        发布时间：2021-03-12
      • Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.002
        摘要：Heat conductivity, mass heat capacity and thermal conduction of fourkinds of wood chip,which were produced from poplar,birch,basswood,elmtrees,were measured and analysed by using DRM-1 Heat Conductivity Equip-ment.When moisture content changed(dry density of chip bed keeping unchan-ged) from 10% to 90%, the results got from the experimont were that: thevalues of heat conductivity of all kinds of ivood chip decreased significantlywith the decreasing of moisturx content and ranged from 0.17～0.28W/(m·K);the values of thermal conduction decreased with the increasing of moisture con-tent and ranged from 0.0012～0.0034￣2/h;the values of mass heat capacitydecreased with the decreasing of moisture content and ranged from 0.4 ～0.7kJ/(kg·K).The influence of the species of broad leaved trees chip on the thermo-physical parameters was not found.  
        关键词：Wood chip aggregates;moisture content;Heat conductivity;Ther-mal conduction;Mass heat capacity   
        3
        |
        56
        |
        1
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7352052 false
        发布时间：2021-03-12
      • Chen Zhilin
        Issue 2, (1994) DOI: 10.19455/j.mcgy.1994.02.004
        摘要：Parallel strand lumber(PSL)is a new kind of enginering material in the recent years.As raw material,poplar PSL was studied.The relationship between hot-pressing parameters of UF bond PSL and its properties was ana-lyzed. Optimum technological parameters were obtained as follows(the thick-ness of the final products、was 15 mm): hot-pressing temperature 145℃ hot-pressing time 20min; hot-pressing pressure 6.76MPa; final products density 0.60g/cm.  
        关键词：Poplar;Parallel strand lumber   
        3
        |
        126
        |
        13
        <HTML>
        <L-PDF>
        <引用本文> <批量引用> 7351803 false
        发布时间：2021-03-12
      0