Some printing parameters affecting the screw withdrawal strength of materials used in joints developed in 3D printers for furniture

Öz

This study examined to benchmark the screw withdrawal strength (SWS) of the 3D-printed PLA materials considering various infill patterns and ratios. SWS is one of the critical material properties for furniture joints. For this purpose, dimensions of 10 × 50 × 50 mm specimens made of PLA+ were printed according to ASTM D 6117-18. Three infill patterns (line, grid, and concentric) and four infill ratios (25%, 50%, 75%, and 100%) were used as printing parameters to construct a complete 3 × 4 factorial experiment. According to the results, line infill patterns had the highest density compared to the grid and concentric patterns for all infill ratios. Concentric infill patterns with an infill ratio of 100% (108.41 MPa) had the greatest SWS. Grid infill patterns provided higher strength at the lower infill ratios than line and concentric infill patterns. Here, diffusion for interfaces of strands affected the SWSs of the 3D-printed materials. This study would provide insight into the 3D-printed joints in the field of furniture mechanics.

Anahtar Kelimeler

• 3D printing
• Screw withdrawal strength
• Polylactic acid

Mobilyalar için 3B yazıcılarda geliştirilen birleştirmelerde kullanılan malzemenin vida tutma kapasitesini etkileyen bazı baskı parametreleri

Öz

Bu çalışma, çeşitli dolgu desenleri ve oranları dikkate alınarak 3D baskı ile üretilen PLA malzemelerinin vida çekme dayanımını (VÇD) karşılaştırılmasını incelemiştir. VÇD mobilya birleştirmeleri için önemli bir malzeme özelliğidir. Bu amaçla, ASTM D 6117-18 standardına göre 10 × 50 × 50 mm boyutlarında numuneler basılmıştır. 3 × 4 faktörel deney için üretim parametreleri olarak üç dolgu deseni (çizgi, ızgara ve konsantrik) ve dört dolgu oranı (%25, %50, %75 ve %100) kullanılmıştır. Çalışma sonuçlara göre, çizgi dolgu desenleri, tüm dolgu oranlarında ızgara ve konsantrik desenlere kıyasla en yüksek yoğunluğa sahip olmuştur. %100 dolgu oranına sahip konsantrik dolgu desen en yüksek VCD’na sahiptir (108,01 MPa). Düşük dolgu oranlarında ise ızgara dolgu desenleri, çizgi ve konsantrik dolgu desenlerine göre daha yüksek dayanım sağlamıştır. Burada, ipliklerin arayüzleri için oluşan difüzyon 3B baskılanan malzemelerin VDÇ’lerini etkilemektedir. Bu çalışma, mobilya mekaniği alanında 3B baskı ile üretilen birleştirmelere dair öngörüler sunacaktır.

Anahtar Kelimeler

• 3B baskılama
• Vida tutma kapasitesi
• Polilaktik asit

Kaynakça

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