Method for manufacturing piano tuning peg plate

Abstract

The invention belongs to the technical field of piano manufacturing. A method for manufacturing piano tuning peg plate comprises the following steps: choosing a log, cutting off, steaming and cooking, rotary-cutting or saw-cutting a single plate, drying, applying glue, ageing, cold pressing, hot pressing, cutting edge, sanding, fragmenting, and acquiring the finished products, wherein the thickness of acquired tuning peg plate is 3.5-4.5cm; the thickness of the single plate is 2.7-6.0mm; the number of single plate layer in the plate blank is 7, 9 or 11; the density of the finished product tuning peg plate is 0.85-1.0g / cm3; and the moisture content is 6-10%. The acquired tuning peg plate has proper nail-holding force and can be used for conveniently tuning. After the tuning peg plate is used for a long time, the tuning peg plate still has better elasticity, toughness, and maintained nail-holding force, and the intonation stability of piano is ensured.

Description

technical field [0001] The invention relates to a method for manufacturing a piano pegboard, which belongs to the wood processing industry. Background technique [0002] The pegboard is used to stabilize the pegs and tension the strings, and plays a pivotal role in the piano. Most of the current pianos use hardwood veneers such as beech or colored wood, which are divided into about 20 layers and then hot-pressed to form the peg board. The 2.4mm veneer is divided into 15-26 layers for sizing and hot-pressing to form a composite board, and the hot-pressing parameters of a specific implementation method are disclosed in the specification: hot-pressing time 90s / mm, hot-pressing temperature 130℃~ 140°C, pressure 5.0MPa. [0003] The disadvantages of the prior art are: the number of veneer layers is large, resulting in a corresponding increase in the adhesive layer, and the adhesive layer itself is inelastic. Therefore, when the peg plate manufactured by the prior art is initial...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the prior art are: the number of veneer layers is large, resulting in a corresponding increase in the adhesive layer, and the adhesive layer itself is inelastic. Therefore, when the peg plate manufactured by the prior art is initially screwed into the peg, the torsion is relatively large. The screw-holding force is also relatively large, but during use, after multiple tunings, the screw-holding force will decrease, making it difficult to ensure the stability of pitch

Simultaneously, the peg board density produced according to the manufacturing method disclosed in the prior art is relatively large, and the elasticity and toughness of the wood fibers are reduced, which will also cause the above-mentioned defects.