最新刊期
      期 0 ， 2020
      • JIANG Ze hui,FEI Ben hua,WANG Xi ming,ZHAO Rong jun,LIU Jun liang
        Issue 4, Pages: 3-6(2002) DOI: 10.19455/j.mcgy.2002.04.001
        摘要：This paper reviewed and analysed the drying properties and characteristics of Eucalyptus. It indicated that variations of density, moisture content and shrinkage of Eucalyptus were distinct. Collapse and checks were main defects in drying process. The pre freezing treatment and conditioning before and after drying could reduce wood collapse. Some suggestions for further research of drying schedule and two stage drying technology for various kinds of Eucalyptus lumbers in different sizes were put forward.  
        关键词：eucalyptus;Drying properties;Drying technology;Collapse   
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        发布时间：2021-02-08
      • CAO Zhong rong
        Issue 4, Pages: 7-9(2002) DOI: 10.19455/j.mcgy.2002.04.002
        摘要：This paper analyzed the difference between procurement standard for imported hardwood plywood in United State （IHPA） and national plywood standard in China concerning wood species, type, construction of panels, dimensions and tolerances, classification by surface appearance, physical and mechanical properties, formaldehyde emission content as well as marking and packaging. Meanwhile, some countermeasures were proposed briefly in order to help domestic enterprises to produce the plywood in accordance with plywood the export demand.  
        关键词：plywood;standard;difference   
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        发布时间：2021-02-08
      • XU Chang yan,HUA Yu kun
        Issue 4, Pages: 10-12(2002) DOI: 10.19455/j.mcgy.2002.04.003
        摘要：Phenol formaldehyde resin （PF） is used widely in water resistant wood based panel manufacturing in China, but its above 100 ℃ curing temperature and long pressing time result in low productivity. This study focused on Poplar flakeboards using aqueous phenol formaldehyde resin （PF） by steam injection vacuum pressing（SIVP） . Comparing the processing parameters and quality indexes of board by SIVP with that in conventional techniques, the results showed that by SIVP, the board pressing time could be shorten to 35% of that in conventional pressing; some physical and mechanical properties of the boards could be improved: the thickness swelling （ TS ） was decreased by 33%, the internal bond strength （ IB ） increased about 15%, formaldehyde emission of the board was reduced by 24%. But the bending property of board was reduced significantly. The board had higher core density with more uniform density profile.  
        关键词：Steam injection vacuum pressing （SIVP）;Phenol formaldehyde resin （PF）;Pressing time;Density profile   
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        发布时间：2021-02-08
      • HAN Jian
        Issue 4, Pages: 13-14(2002) DOI: 10.19455/j.mcgy.2002.04.004
        摘要：The effects of technical factors in different levels including adhesive temperature, stiring speed and time, as well as adhesive density on the stability of pigment in phenol formaldehyde resin were studied by single factor test method. Results showed that with the increase of the adhesive temperature, the mixing speed, the adhesive density and the mixing time, the stability of pigment in adhesive could be improved. The optimal factors were the temperature of 75～80 ℃, the mixing time for 40～50 min, the mixing speed of 100～110 r/min and the adhesive density of 1.1～1.2 g/cm 3.  
        关键词：Technical factors;Pigment;Adhesive   
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        发布时间：2021-02-08
      • LI Yu dong,WANG Jian jun,ZHOU Qin
        Issue 4, Pages: 15-17(2002) DOI: 10.19455/j.mcgy.2002.04.005
        摘要：The experiment was to find out an environment friendly preservative to protect the Rubberwood （Hevea brasiliensis） from blue stain and mould. Chemicals used to treat the Rubberwood were borax and boric acid, Parachem, Antiblu 20EC and Antiborer 10EC. Results showed that the permanence of the preservative of Antiblu 20EC could least four weeks regardless of the Rubberwood treated with or without borax and boric acid, and three months for the Parachem treated Rubberwood. The Rubberwood could be well protected by pressure treatment with the preservative of boride and half minute infusion treatment with Antiblu 20EC.  
        关键词：rubberwood;Blue stain and mould;Wood protection   
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        发布时间：2021-02-08
      • JIANG Ming liang,LIU Xiu ying
        Issue 4, Pages: 18-19(2002) DOI: 10.19455/j.mcgy.2002.04.006
        摘要：The experiment on the effect of fire retardant FR 1 on the hygroscopicity and natural durability of Pinus massoniana and Populus tomentosa was conducted. The hygroscopicity of FR 1 treated wood was less than 28% under high humidity condition, which indicated that anti hygroscopicity of Pinus massoniana treated by FR 1 was much better than that by ammonium phosphate and boron compounds at the different retention. But according to the test results of natural durability of the treated wood, FR 1 was less effective than the preservative CCA or ACQ B, therefore, the author suggested that FR 1 would be not suitable for exterior and ground contact wood.  
        关键词：FR 1;Fire retardant;Hygroscopicity;Natural durability   
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        发布时间：2021-02-08
      • MENG ling lian 1,CHEN Guang wei 2,HUA Jun 2
        Issue 4, Pages: 20-22(2002) DOI: 10.19455/j.mcgy.2002.04.007
        摘要：The several common types of hydraulic pressure sources of hydraulic system in hot press were analyzed. The influences of hydraulic pressure sources on performance of hot press and the qualities of board were also discussed in this paper.  
        关键词：Hot press;Hydraulic pressure system;Hydraulic pressure source   
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        发布时间：2021-02-08
      • LI Yan jun 1,GAO Jian min 2,JIN Yong ming 1,ZHANG Hui 3
        Issue 4, Pages: 23-25(2002) DOI: 10.19455/j.mcgy.2002.04.008
        摘要：Most of wood drying kilns in China are steam drying and furnace gas drying. This paper described classification and specialities of two typical wood drying methods respectively. In addition, how to make suitable choice of dryers and make reasonable collocation for drying equipment were analysed. And then some suggestions were provided.  
        关键词：wood drying;Drying equipment;application   
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        发布时间：2021-02-08
      • HAN Wei sheng,WANG Ying,SHI Xiao juan
        Issue 4, Pages: 26-28(2002) DOI: 10.19455/j.mcgy.2002.04.009
        摘要：Based on modern design theory,the key items of modern furniture drawings such as the drawing basic,function,content and demand of all kinds of furniture drawings,as well as the furniture symbol, code and standardization design were discussed.  
        关键词：Modern design;Furniture drawing;Component;Manufacture   
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        发布时间：2021-02-08
      • GE Hong
        Issue 4, Pages: 29-30(2002) DOI: 10.19455/j.mcgy.2002.04.010
        摘要：Regarding the imported wood flooring cants, the author suggested that the allowance of cants should be remained and determined in accordance with climate difference of destination and wood density of cants. Meanwhile, according to international institution, the author also proposed that the relevant taxation system should regard net wood volume as tax based volume to avoid different taxing standards burdening on the enterprises. The Custom General Bureau has paid much attention to the proposal and has authorized the State Forestry Administration to draft a related standard.  
        关键词：Wood flooring cants;Tax based volume;Allowance   
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        发布时间：2021-02-08
      • WU Yu
        Issue 4, Pages: 31-32(2002) DOI: 10.19455/j.mcgy.2002.04.011
        摘要：Some Lauan（ Shorea spp.）and Manchurian Ash（ Fraxinus mandshuria ） plywood were treated with fire retardant CU 60 and their properties were also tested. Results showed that the fire retardant property of the treated plywood could reach fire retardant grade B 1;the adherence of paint film grade could reach level 2; the bond strength decreased less than 10% according to the demands of related standards.  
        关键词：plywood;Fire retardant grade   
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        发布时间：2021-02-08
      • WANG Ze bin
        Issue 4, Pages: 33-35(2002) DOI: 10.19455/j.mcgy.2002.04.012
        摘要：In this paper, the author concluded some good practices of extending the service life of high speed bearing from experience.  
        关键词：Bearing;Service life   
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        发布时间：2021-02-08
      • CHEN De wang
        Issue 4, Pages: 34-35(2002) DOI: 10.19455/j.mcgy.2002.04.013
        摘要：According to the construction and working principle of MDF former, the author ana lysed the influencing factors on mat forming quality. With respects to examination method, the diagram of weight distribution of mat and manufacturing technology, some effective control methods for MDF mat forming were discussed  
        关键词：Medium density fiberboard（MDF）;Mat forming;quality   
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        发布时间：2021-02-08
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