瑞士研究人員開發出碳纖維小號

位于瑞士Rapperswil的拉珀斯維爾技術學院（HSR）材料技術和塑料加工研究所（IWK）通過在樹脂傳遞成型中使用熔芯技術，成功地為Da Carbo AG公司開發出一種碳纖維小號。



　　IWK利用一種兩部分組成的模具來生產這種碳纖維小號。每一部分都帶有一個鋁制末端片和一個壓鑄鉍錫合金內芯，并加入一個帶有多個編織軟管的預成型件用于樹脂浸漬和固化。在拿掉最終硬化的小號號身后，再將熔芯放入熱水槽中使之融化供再使用，鋁制末端片也可重復利用。

　　這種碳纖維小號在2011年德國塑料展（FAKUMA）上展出，且不會出現黃銅小號經常發生的冷凝水點蝕現象。IWK介紹說，該產品還更結實，重量更輕，在演奏前也不需要做太多的調整。

　　該研究所的負責人Frank Ehrig告訴《歐洲塑料新聞》說，這種塑料小號還更易于演奏，因為所需的空氣壓力較小。他補充說，經過蘇黎世市政廳管弦樂團的小號演奏家們的使用，未在演奏中發現與黃銅小號在音質上有任何差別。 內容來自123456

　　這種小號是IWK與Carbo Horns Swiss公司（即DaCarbo公司的前身）合作開發的，這家位于瑞士Lachen的公司在2009年創建，創始人是曾供職于MusikSpiri公司并在小號制造方面有30年豐富經驗的Werner Spiri和瑞士蘇黎世聯邦理工學院的材料科學家Andreas Keller。

　　Keller說，Da Carbo小號能夠發出柔和而又醇厚的聲音，因為其所用的材料相比黃銅能更好地抑制能耗較大的壁震動。

The IWK materials and plastics processing institute at HSR university in Rapperswil, Switzerland, has developed a Carbon fiber reinforced polymer (CFRP) trumpet for DaCarbo by using lost core technology in resin transfer moulding (RTM).

To make the trumpet, IWK used a two part-mould. Each part has an aluminium end-piece and a diecast bismuth-tin alloy core, and receives a preform consisting of several braided hoses for resin impregnation and curing. The finished cured trumpet body is removed then the lost cores are melted in a hot water bath for re-use, along with the aluminium end-pieces. 123456


The trumpet, exhibited at Fakuma 2011, has no condensed water pitting corrosion, which often happens with brass trumpets. It is also more robust, weighs less and needs fewer adjustments before playing, says IWK.


The institute's head, Frank Ehrig, told European Plastics News the trumpet is also easier to play because it requires less air pressure. Trumpet players at the Zurich Tonhalle orchestra have not detected differences in tone quality over a brass trumpet, he adds.


IWK developed the trumpet with CarboHorns Swiss, now DaCarbo, founded in 2009 by Werner Spiri, who has 30 years experience in making trumpets at his Musik Spiri company, and Andreas Keller, a material scientist at the ETH university in Zurich.


Keller says the DaCarbo trumpet produces a warm, full-bodied sound, as it suppresses energy-consuming wall vibrations better than brass.