Development of cylindrical laminated veneer lumber by use of helical-winding method.

采用螺旋缠绕法开发圆柱形单板层积材。

• 批准号: 07556042
• 负责人: KAWAI Shuichi
• 金额: $ 6.08万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07556042/
• 关键词: wood composite; laminated veneer lumber (LVL); cylindrical LVL; helical winding method; lumber composite product

This study deals with the production of hollow cylindrical laminated veneer lumber (LVL) with helical-winding method. The design and the manufacture of prototype machine on a trial basis and the production technology of cylindrical LVL were investigated. The results obtained were followings ;1.Rotary-cut veneers were successfully jointed into a long tape by sewing parallel to the length of the tape (across the grain of veneer).2.The effect of lamination with interlocked grain on the modules of elasticity of LVL was analyzed theoretically, and verified with experimental data.3.Mixed resole-type adhesive resin proved to shorten the pressing time dramatically to 5 sec at the temperature of 40 C on the adhesive layr.4.A helical winder with a fixed mandrel showed it principally possible to produce the cylindrical LVL in the continuous process.5.A prototype helical winder with a slide-shifter was designed and set up on a trial basis and cylindrical LVLs were successfully manufactured.6.The deformation behavior and the stress distribution due to shrinkage in cylindrical LVL with helical interlocked grain was clarified by a modeling approach with a two-dimensional finite element method.

这项研究介绍了使用螺旋带方法的空心圆柱板贴面木材（LVL）的生产。研究了原型机的设计和制造，并研究了圆柱LVL的生产技术。获得的结果是后面的； 1.通过平衡于胶带长度的缝制（横跨贴面的晶粒）。将贴合的贴面成功地连接到长胶带中。2。用锁紧纹理层压对LVL弹性模块的层压效果进行了理论上分析，并通过实验数据进行了验证。在粘合剂衬里的40 c温度下为5秒。4。一个带有固定曼德雷尔的螺旋悬挂器在连续过程中主要有可能产生圆柱形LVL。5.a设计并在试验的基础上设计并在试验的基础上设计并设置了具有幻灯片变速器的原型螺旋式悬挂器，并与cylindrical LVL合作。6。通过使用二维有限元法的建模方法来阐明螺旋互锁的晶粒。

项目成果

Yang, P., et. al.: "Analysis of Residual Stress Distribution of Cylindrical LVL with Herical Interlocks Grain" Proc. Third Pocific Rim Bio-Based Composites Symp.340-345 (1996)

杨，P.，等。

Sasaki,H,et.al.: "Cylindrical LVL for Structural Use Mode by Spiral Winding Method" Proc.Intern'l Wood Engineering Conf.'96. Vol.3. 538-540 (1996)

Sasaki,H,et.al.：“螺旋缠绕法结构使用模式的圆柱形 LVL”Proc.Internl Wood Engineering Conf.96。

Sasaki, H. ; Yamauchi, H. ; Miura, I. ; Koizumi, A.: "Manufacture and Properties of Hollow Cylindrical LVL" Proc.Third pacific Rim Bio-Based Composites Symposium. 335-339 (1996)

佐佐木，H.；

Sasaki,H.et.al.: "Manufacture and Properties of Hollow Cylindrical LVL" Proc.Third Pacific Rim Bio-Baced Composites Symp.335-339 (1996)

Sasaki,H.et.al.：“空心圆柱形 LVL 的制造和性能”Proc.Third Pacific Rim Bio-Baced Composites Symp.335-339 (1996)

Sasaki, H. ; Yamauchi, H. ; Koizumi, A. ; Iijima, Y. ; Tamura, Y. ; Sasaki, T. ; Kawai, S.: "Cylindrical LVL for structural Use Made by Spiral-Winding Method" Proc.International Wood Engineering Conf.'96. Vol.3. 538-540 (1996)

佐佐木，H.；