腹板固化后巴薩木與纖維布分離

ktking

引用第7樓滄海蛟龍于2010-08-17 02:18 PM發表的 :
是你們自己公司做的腹板吧 [s:2]

大家查一下國內哪家腹板用巴莎做芯材得就知道是誰做的了
滄海蛟龍CPC的？

風海無涯

引用第5樓李嶙于2010-08-16 09:29 PM發表的  :
Balsa 與玻纖布分離的第一大可能性, 是 Balsa 的含水率超高。在2004~2005年間發生過多次。最后試驗的結果是：當Balsa 的含水量在12% 以上時極易發生分層。但 Balsa 的含水量低于4%時，又不易于和樹脂的結合。因此應該控制 Balsa 的含水量在4~8% 左右為佳。

此外你看到的玻纖布上的白斑，是一個典型的現象：即芯材的含水量超標，在抽真空環境下，并模具加熱條件下，水會蒸發成水蒸氣，這會嚴重影響玻纖布與樹脂的浸潤。

我同意這個說法，還是balsa木的含水率過高導致的問題。

李嶙

這些年的風電行業爆發式增長，使得原材料的廠商大賺其錢。Balsa木的質量也下降很多。以前的木質均勻，在120公斤基重，即可保證強度。而今多用小樹拼成板子，木質不勻。非得150公斤的平均基重，方能保證整個的板子都能符合強度標準。

davidli

按樓主說的這么嚴重有可能巴薩木受潮或玻纖布受潮，也可能有漏氣沒及時發現處理，還可能與輔材的鋪設有關。

ktking

引用第12樓李嶙于2010-08-25 11:37 PM發表的 :
這些年的風電行業爆發式增長，使得原材料的廠商大賺其錢。Balsa木的質量也下降很多。以前的木質均勻，在120公斤基重，即可保證強度。而今多用小樹拼成板子，木質不勻。非得150公斤的平均基重，方能保證整個的板子都能符合強度標準。

I some situations balsa wood sheets with a very high average density have been discovered in regularly shipments of balsa wood. The high density gives the following disadvantages:



Increased weight of balsa set, - increased blade weight.

Increased resin absorption (high density balsa wood absorbs more resin than low density balsa wood, - I can not explain why it is so), - increased blade weight.

Due to higher resin absorption the exothermal temperature will also be increased. This can cause moisture in the wood to diffuse into the laminate, see picture 1.


file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/01/clip_image002.jpg


Picture 1: Damage in the laminate with high density balsa wood.



The high density balsa wood can be recognized by the increased weight of the sheet, by increased hardness of the wood and by a darker colour of the wood compared to normal densities, see picture 2.



file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/01/clip_image004.jpg
Picture 2: Two sheets of balsa wood side by side. At the left the light coloured standard density balsa wood is shown. At the right the dark coloured high density balsa wood is shown.



Until now only a relatively small amount of high density balsa wood sheets have been discovered. It will only be possible to find the high density sheets by a 100% inspection either at LM or at the balsa wood manufacturer. I do not believe than the cost of a 100% inspection will be cost effective in any of these situations. Anyway LM personnel and/or subcontractors making balsa kits to LM (can also be the balsa wood manufacturer) handle every single sheet by hand, one or more times during the cutting, ironing and moulding processes. Attention should therefore be shown during these processes in order to discard high density sheets. According to LM purchase specification PS-10008/A5 the average sheet density should be within 152±37 kg/m³. You should inform relevant persons at your business unit and at your subcontractors to be aware of this. Also you should write QCR notes for the discarded balsa wood. Then we have the opportunity to investigate how large this problem is.

chenenlin319

樓上圖片不可見。

redmaple

用酸酐固化的環氧樹脂灌注夾心（balsa）需要80c以上溫度才固化，加熱溫度高就可以很明顯看到白斑分層的

寶麗門

李總過來嗎, 專家級, 歡迎.

李嶙

17樓是哪位？

wuselvlang

水太多了吧，另外肯定真空都不過關，就是不用巴薩木也不會有氣泡吧！
還說剝離，肯定氣密性不好吧