Yonga levha üretim süreçlerinde pres süresinin enküçüklenmesi

Öz

Dünyada yonga levha üretiminde yaşanan yoğun rekabet, maliyetler üzerinde etkili önemli parametrelerden biri olan işlem sürelerinin enküçüklenmesini zorunlu kılmaktadır. Bu çalışmada, deney tasarımı tekniklerinden yaygın olarak kullanılan yanıt yüzey yöntemi (YYY)’nin matematiksel alt yapısı kullanılarak, üretim hızını arttırmak amacıyla pres süresinin enküçüklenmesi amaçlanmıştır. Bu amaçla yonga levhanın pres süresi üzerinde etkili değişkenlerden; yonga levhanın rutubeti, banyo jeli süresi, yonga levhanın altı için gravür jeli süresi, yonga levhanın üstü için gravür jeli süresi, akış, final ağırlığı, kağıdın rutubeti, üreformaldehit (UF) miktarı, melamin formaldehit (MF) miktarı, pres yoğunluğu, pres basıncı ve pres sıcaklığı girdilerinin optimum değerleri araştırılmıştır. Bu sayede pres süresi azaltılırken, üretim miktarı ve hattın verimliliğinin arttırılması amaçlanmıştır. Modelleme amacıyla, her biri 5 tekrarlı 56 tane gözlem değeri kullanılarak girdilerle pres süresi arasındaki matematiksel ilişki belirlenmiş ve ardından eniyileme yapılmıştır. Çalışmanın sonunda, hali hazırda seçilen ürün tipi için gözlenen en düşük pres süresi olan 13.57 sn. 11 sn. kadar düşürülmüştür.

Anahtar Kelimeler

• Yonga levha,Pres süresi,Eniyileme

Minimization of pres time at particleboard production

Abstract

The intense competition in the production of particleboard in the world requires minimization of process times which is one of the important parameters effective on costs. In this study, it is aimed to minimize the press time in order to increase the production speed by using the mathematical sub-structure of the response surface method (RSM) which is one of the well-known design of experiments techniques. For this purpose, optimum levels of the factors those have effect on press time namely humidity of the particleboard, bath gel time, gravure gel time for the bottom of the particleboard, gravure gel time for the top of the particleboard, flow, final weight, humidity of the paper, amount of urea-formaldehyde (UF), amount of melamine formaldehyde (MF), press density, press pressure and press temperature were investigated. In this case, It is aimed to increase the production amount and productivity of the line while decreasing the press time. For the purpose of modeling, the mathematical relationship between the factors and the press time was determined by using 56 observation values of 5 repetitions each and then optimization was performed. At the end of the study, the press time is reduced to 11 seconds from 13.57 seconds-which is the lowest press time observed for the currently selected item type.

Keywords

• Particleboard,Press time,Optimization

Kaynakça

1. Ashori A, Nourbakhsh A. “Effect of press cycle time and resin content on physical and mechanical properties of particleboard panels made from the underutilized low-quality raw materials”. Industrial Crops and Products, 28(2), 225-230, 2008.
2. Nemli G, Hiziroglu S. “Effect of press parameters on scratch and abrasion resistance of overlaid particleboard panels”. Journal of Composite Materials, 43(13), 1413-1420, 2009.
3. Akyuz KC, Nemli G, Baharoglu M, Zekovic E. “Effects of acidity of the particles and amount of hardener on the physical and mechanical properties of particleboard composite bonded with urea formaldehyde”. International Journal of Adhesion and Adhesives, 30(3), 166-169, 2010.
4. Tabarsa T, Jahanshahi S, Ashori A. “Mechanical and physical properties of wheat straw boards bonded with a tannin modified phenol-formaldehyde adhesive”. Composites Part B-Engineering, 42(2), 176-180, 2011.
5. Trianoski R, Iwakiri S, deMatos JLM, Prata JG. “Feasibility of using of Acrocarpus fraxinifolius in different proportion with Pinus taeda for production of particleboard”. Scientia Forestalis, 39(91), 343-350, 2011.
6. Iwakiri S, deMatos JLM, Trianoski R, Prata JG. “Production of homogeneous and multilayer particleboard from melia azedarach (cinamomo) and pinta taeda with different resin contents”. Cerne, 18(3), 465-470, 2012.
7. Taghiyari HR, Bibalan OF. “Effect of copper nanoparticles on permeability, physical, and mechanical properties of particleboard”. European Journal of Wood and Wood Products, 71(1), 69-77, 2013.
8. Sulaiman NS, Hashim R, Amini MHM, Sulaiman O, Hiziroglu S. “Evaluation of the properties of particleboard made using oil palm starch modified with epichlorohydrin”. Bioresources, 8(1), 283-301, 2013.

9. Kord B, Roohani M, Kord B. “Characterization and utilization of reed stem as a lignocellulosic resource for particleboard production”. Maderas-Ciencia Y Tecnologia, 17(3), 517-524, 2015.
10. Bavaneghi F, Ghorbani M. “Mechanical behavior and springback of acetylated particleboard made in different press times”. Wood Material Science & Engineering, 11(1), 57-61, 2016.
11. Box G, Wilson K. “On the experimental attainment of optimum conditions”. Journal of Royal Statistical Society Series B, 1(13), 1-38, 1951.
12. Montgomery DC. Design and Analysis of Experiments. 5th ed. New York, USA, John Wiley & Sons Inc., 2001.
13. Karaoglan AD, Celik N. “A New Painting Process for Vessel Radiators of Transformer: Wet-on-Wet (WOW)”. Journal of Applied Statistics, 43(2), 370-386, 2016.
14. Karaoglan AD. “Residual based flow time estimation algorithm for labor intensive project type production systems”. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi, 18(54), 580-595, 2016.