Effects of factors on direct screw withdrawal resistance in medium density fiberboard and particleboard

Abstract

The effect of chipboard screw sizes on screw withdrawal strength was investigated using different screw insertion technique. Large diameter chipboard screw has a thicker screw thread depth than small size chipboard screw. If large chipboard screw tested on screw withdrawal test, then it will have significantly higher screw withdrawal strength than smaller chipboard screw because it will have better particle grip during screw insertion. The objective of this study is to determine screw withdrawal strength of three difference sizes chipboard screw using different types of screw insertion technique; self-drilling, pilot-hole and P+CSK insertion technique. Screw withdrawal strength of different sizes of chipboard screw was measured through its resistance after insertion to the particleboard panel using different style of screw insertion technique. Results obtained shows that the best practice for screw selection was based on screw insertion technique. Samples from three different screw sizes with self-drilling screw insertion technique have met the minimum requirement of screw withdrawal strength. Smaller chipboard screw which is 3.5M CS has the highest screw withdrawal strength when applied with self-drilling screw insertion technique. However, this small diameter of chipboard screw did not meet minimum standard requirement when applied with both screw insertion technique which used pilot-hole pre-drilling; pilot-hole and P+CSK screw insertion technique. The result shows only large chipboard screw applied with pilot-hole insertion technique has better screw withdrawal strength compared to small chipboard screw. There is no significant different of screw withdrawal strength for self-drilling screw insertion technique. This suggests that chipboard screw sizes or screw thread depth did not affect the screw withdrawal strength unless it was applied with pilot-hole pre-drilling.

Determination of the strength performance of table frames

“…They concluded that the screw withdrawal resistance value is linearly proportional with screw diameter. Similar conculsions was obtained by Yorur et al (2020). Regardells to type of material they have used (MDF and particle borards) they shoved that ratio between root of screws and predilled hole has significant influence on screw withdrawal strength.…”

“…According to obtained results, they concluded that beech wood had highest values of screw withdrawal resistance among five tree species, and that mositure content effects withdrawal resistance. Yorur et al (2020) analyse direct screw withdrawal force from various types od wood based panels. Among other things, they concluded that existance of pilot hole has significant influence on withdrawal strength.…”

Sertleştiricinin orta yoğunluklu lif levhanın bazı fiziksel ve mekanik özelliklerine etkisi

“…Because as Tor et al (2016) reported, the structural unity of a product is directly correlated to the connection ability or performance of the members. And, SHR is one of the performance indicators that is adversely affected by soaking to water (Yorur et al 2020).…”

The use of borax pentahydrate of inorganic filler in medium density fiberboard production

“…Wood fibers between 121,07-125,42 kp. Yorur et al (2020) have explained that the highest direct screw withdrawal resistance the test blocks with polyurethane and the lowest direct screw withdrawal resistance the test blocks without a pilot hole drilled in both materials. According to the results, medium density fiberboard was best measured direct screw withdrawal resistance than particleboards.…”