最新刊期

    期 0 , 2020
    • Hao Bingye Liu Zhengtian
      Issue 3, Pages: 2-7(1993) DOI: 10.19455/j.mcgy.1993.03.001
      摘要:The feasibility of manufacturing rice-straw particleboard was discussed when UF resin or the mixtures of UF resin and polymethylene diphenyldiisocyanate (PMDI) were used as binders. The results showed that it was very difficult to produce a board with rather high strength when only UF resin was applied as a binder. However, the adhesion of UF resin to the surface of rice-straw was enhanced obviously by modification with PMDI. Based of study, the optimum technical conditions for making rice-straw particleboard were proposed.  
      关键词:rice-straw;particleboard;UF;PMDI   
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      发布时间:2021-03-12
    • Zheng Pengxue
      Issue 3, Pages: 8-12(1993) DOI: 10.19455/j.mcgy.1993.03.002
      摘要:Temperature in core of mat(TCM) is always influenced by atmospheric temperature when particleboard production building has neither heating system nor heat-retaining measure. When atmospheric temperature is 38℃ TCM may be 40℃ and lower than 8℃ if atmospheric temperature is-7℃. Hot press time must be longer than the normal one if TCM is lower than 15℃, what is more, blow may occur at any moment. On the contrary, relative high TCM, for example, 25℃ is good for shortening press circle. To ensure that partieleboard production has high efficiency, TCM must be controlled. For this purpose heating the air that flows into mat forming machine is remarkable effective and economical. It is also feasible in technology.  
      关键词:particleboard;Atmospheric temperature;TCM;Mat   
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    • Wu Chunchu Song Xiaojing Xu Ruoxuan
      Issue 3, Pages: 13-17(1993) DOI: 10.19455/j.mcgy.1993.03.003
      摘要:In this paper, the approaches to manufacturing of glued-compressed wood for structural purposes with Chinese fir rod are dealt with, better technological parameters are offered; and approaches to the product properties affected by the parameters are also dealt with.  
      关键词:Chinese Fir;Chinese Fir thinnings;Glued-compressed wood   
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    • Lin Weiqi
      Issue 3, Pages: 18-22(1993) DOI: 10.19455/j.mcgy.1993.03.004
      摘要:In this paper, the structural characteristics of two overhead-fan kilns were described. Based on the data about velocity of air flowing through the stack, ratio of recirculating air, difference between ambient temperature and that of the kilns wall, advantages and defects of the two kilns were clarified. Finaly, a drying schedule for rubber wood was introduced and description about the autocontrol process was included.  
      关键词:Rubber wood;Overhead-fan kilns;Ratio of recirculating air;drying schedule   
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      发布时间:2021-03-12
    • Chai Xiuwu
      Issue 3, Pages: 22-27(1993) DOI: 10.19455/j.mcgy.1993.03.005
      摘要:In an experimental stand of intensive management in Zhizhong County, Sichuan Province, plants of Paulownia clone C020 and 5 Paulownia check plants were collected for the studies. Through experiments of many items, the results showed that the length of the wood fibre and the relative crystallization degree of cellulose and microfibrillar angle are better than those of the checks. But the holocellulose and alpha cellulose of its chemical components and the main indices of strength properties of wood are lower than those of the checks. Its yield rate of pulp-making is low When a comparison of the physical properties of its sheet pulp with those of 2 Acacia spp. is made, the result shows that the former is close to or better than the latter.  
      关键词:Paulownia clone;wood property;Chemical mechanical pulp (CMP)   
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      发布时间:2021-03-12
    • Wu Shudong
      Issue 3, Pages: 28-33(1993) DOI: 10.19455/j.mcgy.1993.03.006
      摘要:For the technical demands of low pressure short cycle decorative laminating process, high temperaure and high speed, main problems such as machine frame set, hot plate, oil cylinder and its layout, heating system, hydraulic system should be thought of carefully when the single daylight hot press was designed.  
      关键词:Low pressure short cycle decorative laminating process;Single daylight hot press.   
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    • Issue 3, Pages: 34-35(1993) DOI: 10.19455/j.mcgy.1993.03.007
      摘要:<正> 遵照林业部科技司标准处要求,国家标准《胶合板》(GB 9846.1~9846.12—88)负责起草单位中国林科院木材工业研究所于1993年初对15个使用单位的标准实施情况进行调查。先后收到松江胶合板厂、长春胶合板厂,扬子木材厂、吉林省大石头林业局贮木场、赣州木材厂、黑龙江省苇河林业局人  
        
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    • Issue 3, Pages: 36-38(1993) DOI: 10.19455/j.mcgy.1993.03.008
      摘要:<正> 早在70年代初,印尼的木材工业还是一个小小产业部门。当时,全国除一些简陋的制材厂和作坊式家具厂外,几乎没有任何现代化大型木材加工企业,仅有2个以生产茶叶箱为主的小型胶合板厂,年产盈不足万m~3。但是,在短短的近20年的时间里,印尼的木材工业取得了惊人的成就,不仅已发  
        
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    • Issue 3, Pages: 39-42(1993) DOI: 10.19455/j.mcgy.1993.03.009
      摘要:<正> 在德国的工业中心汉诺威,每两年要举办一次大型国际木工机械展览会,这是世界林业和木材加工业重要的贸易展览会。在1991~1993年的第九、十两届“Ligna”展览会上,提出了今后世界木材加工机械制造业生产发展的几种主要趋势。本文针对我国国情,试图结合这几种趋势,具体探讨今后我国木材加工机械制造业的发展趋势。  
        
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    • Issue 3, Pages: 43-44(1993) DOI: 10.19455/j.mcgy.1993.03.010
      摘要:<正> 国外用亚麻屑生产碎料板已有40多年的历史。1973年欧洲亚麻屑碎料板生产量已达144万m~3。我国具有一定规模的亚麻屑碎料板生产起步于近十年,建成的几条生产线大大提高了亚麻屑板生产的技术水平,但也存在着一些问题,如亚麻屑细碎工序的生产技术。一些厂家由于对亚麻屑特性了解不够,采用木材碎料细碎的办法,用打磨机打磨,结果把亚麻屑打成粉末,还有一些厂家,亚麻屑不经  
        
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    • Issue 3, Pages: 44-45(1993) DOI: 10.19455/j.mcgy.1993.03.011
      摘要:<正> 层积纤维板是利用未裁边的纤维板经过备料、涂胶、组坯、热压胶合、裁边等工序而制成的一种人造板。层积纤维板采用中心对称结构,以避免产生应力和翘曲变形,其表面可以采用普通纤维板,也可以采用压花纤维板和饰面纤维板。厚度一般为5~30mm。层积纤维板的制造工艺、物理力学性能和使用情况如下。  
        
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    • Issue 3, Pages: 46(1993) DOI: 10.19455/j.mcgy.1993.03.012
      摘要:<正> 中林67~#脲醛胶的生产工艺简单、使用方便、价格低廉,因而在全国胶合板行业中广泛使用。我厂使用中林67~#胶已有20年的历史,发现该胶在胶合板生产以及胶粘剂制作中还存以下缺点:①胶合板的耐老化性能较差,②贮存一段时间后胶液底部沉淀分层,贮存期短,③胶的生产工艺有些不合理,  
        
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    • Issue 3, Pages: 47(1993) DOI: 10.19455/j.mcgy.1993.03.013
      摘要:<正> 湛江模压木制品厂是1987年引进原联邦德国华沙力迪装备公司先进模压技术和设备建设起来的,是中国第一家生产模压木制品的大型企业。投产后,从1989~1991年销售形势直线上升。1992年产品销售开始受阻。为了迎接这一挑战,除了在销售  
        
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    • Issue 3, Pages: 48-49(1993) DOI: 10.19455/j.mcgy.1993.03.014
      摘要:<正> 气力运输是木制品生产中的耗电大户之一。据西北太平洋地区35家木制品厂能耗情况的调查表明,气力运输系统的耗电量约为整个工厂能耗的6%~27%。寻求合理的气力运输能量转换方法已为人们关注。一家大型电力公司经过分析研究提出:一个典型木片厂节能效果颇为明显的原因主要是由于其  
        
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    • Issue 3, Pages: 49-50(1993) DOI: 10.19455/j.mcgy.1993.03.015
      摘要:<正> 在国民经济中纤维板的需要量很大,它们广泛用于住宅建筑、家具生产和机械制造业。1990年纤维板估计产量6.4亿m~2,只满足需要量的85%,1995年对纤维板的需要量估计达到8.25亿m~2,其中硬质纤维板7.75亿m~2。1990年前苏联纤维板实际生产能力6.59亿m~2,  
        
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    • Issue 3, Pages: 51-54(1993)
      摘要:<正> 回收废纸用于木质复合材料中城市固体垃圾中所占数量最大的要算是纸张了。尽管旧报纸、旧瓦楞纸包装箱、制浆材料及高档脱墨纸的收回量很大并且呈增加的趋势,但剩余下来的主要几大类纸张(混和等级)的回收率则不足15%,而这类纸张在整个城市固体垃圾占到1/3~1/2。回收率低的主要原因是没有能力进行通用纸的脱墨及必要的净化处理。  
        
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    • Issue 3, Pages: 54(1993) DOI: 10.19455/j.mcgy.1993.03.016
      摘要:<正> 随着我国建筑业的发展,人们对室内装修材料的要求亦不断提高,特别是对天然木质材料的需求量日趋增大。而我国木材资源严重短缺,加上纯天然木质材料易燃,难以满足建筑物的防火要求,因而阻碍了高档木质装饰材料的发展。然而,最近  
        
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