ShapeTex用短纖維SMC成功覆蓋預制體
日期：2018-08-01
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Shape集團成功地將連續碳纖維預制體與采用壓縮成型的環氧薄板模塑復合材料結合在一起
Shape Group(Witney，UK)已經成功地將短纖維板料(SMC)組合在優化的連續碳纖維ShapeTex預制件上的批零件進行了壓縮成型。這個過程通常被稱為
過模
。通常情況下，模具是注射成型的化合物，但是在這種情況下ShapeTex使用的是壓縮成型的SMC。
ShapeTex
預制體使用連續的碳纖維束，使完成的部分具有顯著的強度，包括徑向和軸向增強。短纖維SMC采用環氧樹脂。成品厚4.5毫米。
公司不能宣布這一示范的客戶。“但這是一個令人興奮的發展，”Shape的董事總經理彼得·麥庫爾(Peter McCool)說。“我們使用ShapeTex預制體的連續纖維作為結構支撐，我們在上面加固一個短纖維層壓板，它可以更容易地流動和填充模具型腔。”
“這項技術的潛力相當大，”McCool繼續說。“我們已經對這一組合進行了很長一段時間的研究，并認為現在是將其推向市場的時候了。”我們有幾個客戶，他們喜歡SMC的美觀外觀，喜歡用管道、肋拱和固定滾筒按壓和修復部件的能力，這意味著我們可以將特性合并到一個復合部件中，否則需要多個操作和部件。這一工藝是用環氧樹脂熱固性樹脂開發的，并使用經批準的樹脂系統提供了強度優化的封閉模塑件。“
雖然這些試驗是在一個扁平的模式下進行的，但是這個過程同樣適用于復雜的和雙曲率的零件。Shape的目標是在汽車和體育器材市場上大量應用這一過程。
原文如下：
Shape Group (Witney, UK) has successfully compression molded the first batch of parts that combine short fiber sheet molding compound (SMC) over an optimized, continuous carbon fiber ShapeTex preform. This process is commonly referred to as
overmolding
. Typically, the overmold is an injection molded compound, but in this case ShapeTex used a compression molded SMC.
The
ShapeTex
preform uses a continuous tow of carbon fiber that gives significant strength to the finished part, including both radial and axial reinforcement. The short fiber SMC uses epoxy resin. The finished part is 4.5mm thick.
The company cannot announce the customer for this demonstration. “But it’s an exciting development,” says Shape’s Managing Director, Peter McCool. “We use the continuous fiber of the ShapeTex preform as the structural backing on to which we consolidate a short fiber laminate that can flow and fill the mold cavity more easily.”
“The potential of this technology is quite significant,” McCool continues. “We have been working on this combination for quite a while and feel that now is the time to bring it to market. We have several customers that like the aesthetic look of the SMC and the ability to press and cure parts with channels, ribs and fixing bosses means that we can incorporate features into a single composite part that would otherwise require multiple operations and parts. This process has been developed using epoxy thermoset resins and offers closed molded parts with optimized strength using approved resin systems.”
Although these trials were conducted in a flat mold the process lends itself equally to complex and double curvature parts. Shape is targeting high volume applications in the automotive and sports equipment market with this process.
