تأثیر جنس قلیف، نوع چسب و پیچ بر ظرفیت لنگر خمشی اتصال گوشه‌ای قاب ساخته‌شده با تخته ‌فیبر دانسیته متوسط (MDF) زیر بار کشش قطری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار گروه منابع طبیعی، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشجوی کارشناسی گروه منابع طبیعی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران

3 استادیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه زابل، زابل، ایران

چکیده

درِ کابینت MDF به‌طور معمول به‌صورت قاب با اتصال فارسی با دوبل، بیسکویت، کلیدهای پلاستیکی و قلیف با چسب ساخته می‌شود. به‌دلیل سرعت کار و گیرایی، اغلب از چسب سیانوآکریلات (CA) برای چسباندن آنها استفاده می‌شود، اما این روش غیراصولی است، زیرا به‌دلیل شکننده بودن، چسب بعد از مدتی از ناحیۀ اتصال جدا می‌شود. از این‌رو این تحقیق با هدف بررسی تأثیر جنس قلیف (تخته چندلا، تخته‌ فیبر و چوب صنوبر)، نوع چسب پلی‌اورتان (PU) و پلی‌وینیل استات (PVAc) و کاربرد پیچ به‌عنوان اتصال‌دهندۀ مکانیکی بر ظرفیت تحمل لنگر خمشی قاب MDF تحت بار کشش قطری انجام گرفت و نتایج با قاب کامل برش‌داده‌شده با CNC مقایسه شد. بارگذاری با دستگاه 0308 Hounsfield با سرعت بارگذاری 5 میلی‌متر بر دقیقه انجام گرفت. نتایج نشان داد که با تغییر جنس قلیف، نوع چسب و اتصال‌دهندۀ مکانیکی مقاومت اتصالات به‌ترتیب 2/79، 1/69 و 7/131 درصد تغییر کرد. کمترین لنگر خمشی مربوط به اتصال ساخته‌شده با قلیف تخته چندلا و چسب PVAc بدون پیچ (47/6 نیوتن متر) و بیشترین آن مربوط به دو اتصال ساخته‌شده با قلیف تخته ‌فیبر و صنوبر با چسب PU به‌همراه پیچ بود (به‌ترتیب83/50 و 68/48 نیوتن متر). لنگر خمشی نمونه‌های ساخته‌شده با قلیف تخته فیبر و صنوبر با چسب PU به‌همراه پیچ حتی از نمونه‌های قاب کامل بیشتر بود (به‌ترتیب4/12 و 6/7 درصد). از این‌رو برای کاهش دورریز ناشی از برش قاب کامل، باید هر سه قلیف بررسی‌شده با چسب PU به‌همراه پیچ برای ساخت قاب استفاده شود.

کلیدواژه‌ها

عنوان مقاله [English]

The effect of spline material, adhesive type, and screw on bending moment capacity of the mitered frame corner joints made of medium-density fiberboard (MDF) under diagonal tension

نویسندگان [English]

  • Akbar Rostampour Haftkhani 1
  • Farajolah Hajializadeh 2
  • Mohammad Arabi 3
1 Assoc., Prof., of Wood Science and Technology, Department of Natural Resources, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, I.R. Iran
2 BSc student of Wood Science and Technology, Department of Natural Resources, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili. Ardabil, Iran.
3 Assistant Professor, Department of Wood Science and Technology, Faculty of Natural Resources, University of Zabol, Zabol, Iran.
چکیده [English]

Cabinets doors are usually made of medium-density fiberboard (MDF) as mitered frames connected with wooden dowels, biscuits, spline, or plastic keys with adhesive. Because of its rapidly curing and working, cyanoacrylate adhesive is usually used to connect frame members, but they separate after a while due to its brittle fracture, which is an unusual joining method. Therefore, this study was aimed to investigate the effects of Spline material (plywood, fiberboard, and poplar wood), type of adhesive (polyurethane (PU), and Polyvinyl acetate (PVAc)) with and without a mechanical fastener such as screw on the bending moment capacity of the mitered frame corner joints under diagonal tensile, then compared with frames cut with CNC. Loading was applied with a Hounsfield 0308 testing machine with a loading rate of 5 mm/min. The results showed that the changing of the spline materials, adhesive types, and mechanical fastener resulted in 79.2%, 69.1%, and 131.7% change in the strength of the joints, respectively. The least bending moment was observed in joints made with plywood spline and PU adhesive without any screw; on the contrary, the highest bending moment was related to both joints made with fiberboard and poplar spline with PU adhesive and screws (50.83 and 48.48 N.m, respectively). Late two mentioned joints tolerated higher bending moments than the CNC cut MDF frames (12.4% and 7.6%, respectively). Therefore, all frames are necessary to use spline with PU adhesive as well as screws to make the frame, to reduce the MDF offcuts caused by CNC cutting.

کلیدواژه‌ها [English]

  • MDF frame
  • polyurethane adhesive
  • Polyvinyl acetate
  • screw
  • Spline

مراجع

[1]. Eckelman, C.A. (2003) Textbook of product engineering and strength design of furniture. Purdue University, West Lafayette, Indiana: 65-67.
[2]. Dalvand, M., Ebrahimi, G., Haftkhani, A.R., and Maleki, S. (2013) Analysis of factors affecting diagonal tension and compression capacity of corner joints in furniture frames fabricated with dovetail key. Journal of Forestry Research, 24 (1): 155-168.
[3]. Altun, S., Burdurlu, E., and Kılıç, M. (2010) Effect of adhesive type on the bending moment capacity of miter frame corner joints. BioResources, 5 (3): 1473-1483.
[4]. Maleki, S., Dalvand, M., Rostampour, H.A., and Faezipour, M. (2013) The effect of adhesive types and dovetail fitting height on stress carrying capacity of Miter Frame corner joints constructed of particle and Medium Density Fiberboard (MDF). Journal of forest and wood products (jfwp) (iranian journal of natural resources), 66 (2): 203-214.
[5]. Özkaya, K., Burdurlu, E., Ilce, A.C., and Ciiitcioghi, H. (2010) Diagonal tensile strength of an oriented strand-board (OSB) frame with dovetail corner joint. BioResources, 5 (4): 2690-2701.
[6]. Taghiyari, H.R., Ghofrani, M., and Arbabi Ghamsari, F. (2016) Study on the tensile and compression tension-carrying capacity of corner V-nails. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 31 (4): 621-633.
[7]. Derikvand, M., and Eckelman, C.A. (2015) Bending moment capacity of L-shaped mitered frame joints constructed of MDF and particleboard. BioResources, 10 (3): 5677-5690.
[8]. Derikvand, M., and Ebrahimi, G. (2014) Strength performance of mortise and loose-tenon furniture joints under uniaxial bending moment. Journal of Forestry Research, 25 (2): 483-486.
[9]. Omrani, P., Ebrahimi, G., and Kahvand, M. (2019) Investigating the stress carrying capacity of miter corner joints made with biscuit under diagonal tension and compression loading. Iranian Journal of Wood and Paper Industries, 10 (3): 323-336.
[10]. Omrani, P., Ebrahimi, G., and Kahvand, M. (2020) The investigation of the affecting factors on withdrawal resistance of the wooden biscuit joints. Iranian Journal of Wood and Paper Industries, 11 (1): 121-131.
[11]. Vassiliou, V., and Barboutis, I. Strength of furniture joints constructed with biscuits, pp. 1-6.
[12]. Derikvand, M., Ebrahimi, G., and Tajvidi, M. (2014) A feasibility study of using two-component polyurethane adhesive in constructing wooden structures. Journal of Forestry Research, 25 (2): 477-482.
[13]. Derikvand, M., and Pangh, H. (2016) A modified method for shear strength measurement of adhesive bonds in solid wood. BioResources, 11 (1): 354-364.
[14]. Konnerth, J., Gindl, W., Harm, M., and Müller, U. (2006) Comparing dry bond strength of spruce and beech wood glued with different adhesives by means of scarf-and lap joint testing method. Holz als Roh-und Werkstoff, 64 (4): 269-271.
[15]. Altinok, M., Huuml, H., and Sancak, E. (2009) Load carrying capacity of spline joints as affected by board and adhesives type. Scientific research and essays, 4 (5): 479-483.
[16]. Maleki, S., Haftkhani, A.R., Dalvand, M., Faezipour, M., and Tajvidi, M. (2012) Bending moment resistance of corner joints constructed with spline under diagonal tension and compression. Journal of Forestry Research, 23 (3): 481-490.
[17]. Tankut, A.N., and Tankut, N. (2009) Investigations the effects of fastener, glue, and composite material types on the strength of corner joints in case-type furniture construction. Materials & Design, 30 (10): 4175-4182.
[18]. BSI. (2020) BS EN 310: Wood-based panels. Determination of modulus of elasticity in bending and bending strength. Journal (Issue).
[19]. Qiao, L., and Easteal, A.J. (2001) Aspects of the performance of PVAc adhesives in wood joints. Pigment & Resin Technology, 30 (2): 79-87.
[20]. Moazami, V., Afsoni, F., Dadashi, S., and Dadashi, E. (2017) Evaluation the mechanical properties of medium density fiber board of domestic production and imported with help of vertical density profile, infrared rays, Spectroscopy and imagine analyses (case study of Arian Sina Co). IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 32 (1): 145-156.
[21]. Farajollahpour, M., Hatefnia, H., Dorieh, A., Valizadeh Kiamahalleh, M., and Afrouzi, Y.M. (2022) Research on Medium density fiberboard (MDF) behavior against screw axial withdrawal: Impact of density and operational variables. Structures, 39: 194-206.
نشریه جنگل و فرآورده های چوب
دوره 75، شماره 2
شهریور 1401
صفحه 169-184

فایل ها

هم رسانی

ارجاع به این مقاله

آمار