最新刊期

    期 0 , 2020
    • Fang Guizhen Liu Yixing Cui Yongzhi
      Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.006
      摘要:Methods to maximize wood hardness and dimensional stability includes chemical modification,compression and heating treatment.In this study,poplar wood( Populus ussuriensis )was treated with different concentrations of a melamine formaldehyde resin,which was low molecular weight and water soluble,and then compressed while being heated.The results showed 47 per cent of antishrink efficiency( ASE) .And the wood specimen were able to retain almost complete fixation when treated with 10 per cent of resin solution and then soaked in room temperature water and treated with 17 5 and 25 per cent of resin solution and then soaked in boiling water.  
      关键词:Melamine formaldehyde resin;Compregnated wood;Compression deformation;Poplar wood   
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      发布时间:2021-03-12
    • Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.009
      摘要:混凝土模板用胶合板的组坯新工艺及其实际效果分析胡国富(福建省尤溪禾盛木品有限公司尤溪县365100)1前言混凝土模板用胶合板的厚度有12、15、18mm,其中以18mm的为多。我厂生产18mm厚的松木混凝土模板,工艺上采用9层(单板厚度均为2.25m...  
        
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    • Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.004
      摘要:本文应用计算机辅助设计弯曲枕资下锯图,建立了辅助设计的数学模型,并编制了C语言程序,为合理加工弯曲枕资,提高出枕率、综合出材率和产品经济效益提供了理论依据  
      关键词:弯曲枕资;枕木;CAD;下锯图   
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    • Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.011
      摘要:定向结构板的特殊处理定向结构板系列讲座之四南京林业大学定向结构板工程研究中心1概述定向结构板以其特有的用途(比如建筑、车船制造和混凝土模板等)要求产品具有相应的特性,归纳起来有四,即阻燃特性、低甲醛释放特性、耐久性和尺寸稳定性。按照正常工艺制造的定向...  
        
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      发布时间:2021-03-12
    • Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.008
      摘要:胶合成材(续二)李黎9原料选配设备胶合成材生产工艺是用机械加工的方法,去除木材中固有的各种缺陷,将木材原料纵向接长后胶合拼宽、并层积至需要的厚度,是一种无缺陷规格材的加工工艺。因此,快捷、高效地去除木材原料中的缺陷,最大限度地减少木材的损失、提高木材...  
        
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      发布时间:2021-03-12
    • Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.010
      摘要:人造板车间除尘系统浅析范留芬(中国林科院木材工业研究所北京市100091)随着人造板生产的日益发展,工业粉尘的处理工作也随之剧增。为保护环境,国家对粉尘排放的规定亦愈来愈严格。工业“三废”排放试行标准GBJ4~73规定植物纤维性粉尘排放浓度为150m...  
        
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      发布时间:2021-03-12
    • Issue 4, (1996)
      摘要:我国中密度纤维板工业基本情况我国中密度纤维板自1982年第一条生产线建成投产以来,发展很快,对于大家共同关心的有关MDF产量、规模、引进状况等基本情况,至今缺少较完整的资料。中国林学会木材工业分会将于今年9、10月间在湖南长沙召开《中密度纤维板学术研...  
        
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    • Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.007
      摘要:木材胶粘剂用量的估算颜镇韩桐恩(中国林科院木材工业研究所北京100091)(中华人民共和国林业部北京100714)胶粘剂用量的多少,是衡量木材工业技术水平的标志之一,据1980年的统计数字,美国70%以上的木材经过胶接加工[1]。我国的木材胶粘剂用量...  
        
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      发布时间:2021-03-12
    • Issue 4, (1996)
      摘要:综合信息湿法硬质纤维板生产线改产干法无胶中纤板获得成功由深圳招商无胶人造板新技术有限公司承担的新疆石河子148团纤维板厂湿法硬质纤维板生产线改造项目已完成,改造后的生产线已投入运行,生产无胶干法两面光中纤板。该技术改造项目有如下特点:①完全解决了湿法...  
        
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      发布时间:2021-03-12
    • Jiang Zhihong Ye liangming Yu Youming
      Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.003
      摘要:Manchurian ash (Fraxinus mandshurica) is one of the most valuable hardwood species for making high quality wood interior decoration products in China,such as parquet floor.But it is usually difficult to control the drying quality and to improve the drying productivity by using conventional drying technology due to its drying characteristics.This paper described a patented technology for drying Manchurian ash parquet floor blank.The blank was dried in a fire tube drying kiln with continuously rising temperature schedule.The test results showed that the drying speed was quick,the dried blank′s quality was good and the drying schedule was easily operated.  
      关键词:Wood blank drying;Moisture content (MC );Fire tube drying kiln;Manchurian ash   
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      发布时间:2021-03-12
    • Yan Haopeng Cao Zhongrong Guo Wenli
      Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.001
      摘要:The paper studied the reaction mechanism of self bonding in dry process binderless fiberboard manufacture by investigating the chemical composition and conversion of wood.The results showed that:1 both cellulose and hemicellulose were partly hydrolyzed into monosaccharide and oligosaccharide during defiberizing and hot pressing process,and the resulted substances could be converted into furnan products.2 the degraded lignin by thermal conversion could bond with furnan products to form resins.  
      关键词:Dry process binderless fiberboard;Furnan products   
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      发布时间:2021-03-12
    • Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.005
      摘要:增加木材硬度和体积稳定性的方法主要包括化学改性、压缩处理和热处理。本研究使用不同浓度的水溶性低分子量三聚氰胺-甲醛(MF)树脂处理大青杨(Populususuriensis)木材,并在加热过程中作横纹方向的压缩处理。其实验结果表明:经低分子量MF树脂处理的木材试件,抗胀(缩)率(ASE)为47%,阻湿率(MEE)为36%;10%树脂浓度处理的试件在室温条件下浸水可完全保持其压缩变形;17.5%和25%树脂浓度处理的试件在沸水中也可保持其压缩变形  
      关键词:三聚氰胺-甲醛树脂;树脂浸渍压缩木;压缩变形;杨木   
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      发布时间:2021-03-12
    • Wang Ximing
      Issue 4, (1996) DOI: 10.19455/j.mcgy.1996.04.002
      摘要:This paper described technology of making sunflower stem particleboard and overlaid with low pressure melamine(LPM) impregnated paper on the board in home made production line.The results showed that properties of both the substrate particleboard and the overlaid one were able to meet the requirement of GB/T 4 897-92 and GB/T 15 102-94,respectively,when production technology was adjusted and UF resin and MF resin modified,accordingly.  
      关键词:Sunflower stem particleboard;Overlaid;LPM resin   
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