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Vacuum Infusion Process of Sandwiches 夹芯与真空导入工艺
Technical Service Alcan Airex AG, Sins June, 2006

7.2.2006 / MR / Infusion / 1 of 25

Content 内容
? ? ? ? ? ? ? Basic principles of vacuum infusion process 真空导入法的基本原理 Different methods 不同的方法 Core Infusion 夹芯导入 Applications 应用 Support of Technical Services 技术支持 DVD about VIP by André Cocquyt 树脂导入系统DVD

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Items to think about when talking about infusion 关于真空导入法的几个问题
? ? ? ? ? ? Why resin infusion process? Advantages – Disadvantages 为什么使用真空导入工艺导入树脂? 优点 及 缺点 Infusion method (SCRIMP, RTM light, RTM, VARTM, ...) 具体的导入方法(SCRIMP,RTM,轻质RTM, 真空辅助RTM,) Considerations for Infusion Process 做真空导入需要考虑的要点: ? Defining glass fabric, resin system/type, core material. ? 确认好所使用的玻纤及树脂类型和夹芯材料 ? Defining resin inlet points/paths and vacuum outlet points/paths. ? 确认好树脂导入口及真空导出口 ? Initiating sample infusions. 首先要做测试 ? Determination of infusion time. 确定树脂导流过程的时间 General recommendations / TIPS & TRICKS 推介方法/小窍门 Print-through of Glass Fibers, print-through of foam core grooves/holes. 玻纤纹印出, 泡沫夹芯开槽纹路印出 Investment and production cost calculations 投资及生产成本计算 Where can I get help? 从哪里可以得到真空树脂导入工艺的技术支持呢?
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? ? ? ? ?

Why Resin Infusion Processes? 为什么使用真空导入工艺
Advantages 优点 优点: ? Laminate quality and consistency 积层质量好且稳定性好 ? Clean working environment 工作环境洁净 ? Fulfilments of styrene emission regulations ? 满足欧洲的苯乙烯排放标准 Disadvantages 缺点 缺点: ? VIP does not necessarily decrease production time and cost 树脂导入系统不会减少生产时间和降低成本 Investment costs 投资成本 ? Consumables 材料消耗
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Basic set-up

? ? ? ?
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Suitable mould 合适的模具 Vacuum pump and system 真空泵体系 Vacuum consumables 真空耗材 Resin trap 树脂收集器

Infusion methods 导入方法

Vacuum for resin flow Vacuum infusion with flexible bag 使用真空袋膜 vacuum infusion with semi rigid mould 使用手糊模具 RTM (Resin Transfer Moulding) 0.5 – 1 bar 0.3 – 0.6 bar up to 1 bar

Pressure on resin 树脂压力 up to 1 bar 2 – 12 bar

Mould closing 合模 vacuum bag真空袋 vacuum/mechanical真空 合模/机器合模 Mechanical 机械合模

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Infusion methods: SCRIMP process
Vacuum bag 真空袋 Peel Ply 脱模布 Flow media 导流布

Fiber reinforcment 玻纤增强材料 Resin line 树脂管

玻璃 core 泡沫夹芯 Foam

Resin trap 树脂收集器

Vacuum pump 真空泵

Mould 模具

Patented process !!专利方法请浏览
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http://www.tpicomp.com

Infusion process with Flow promotion 带有助流材料的树脂导流工艺
Vacuum bag 真空袋 Resin line 树脂管 Peel Ply 脱模布 Fiber reinforcement + Flow media 玻纤增强材 料 及 导流布 foam core 泡沫夹芯 Resin trap 树脂收集器

Vacuum pump 真空泵

Mould 模具

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Infusion process: Core grooves 夹芯开槽
? ? ? § ¨ ?      
Vacuum bag

Perforation

? ¤

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Foam core

? ?

Peel Ply

Fiber reinforcement

Grooves

Theory: Driving force (Darcy’s law) 原理 动力 原理:

What influences the flow of resin 什么会影响树脂流动? ? Viscosity of resin (function of temperature) ? 树脂的粘度(与温度有关) ? Porosity / permeability of reinforcements 增强材料的孔隙/渗透性 ? Pressure difference 压力差异 ? Flow distance 流动距离

f ?η ? l t= 2?k ? p

t: f: κ: η: l: p:

Filling time 树脂导入时间 Porosity of reinforcements增强材料的孔隙 Permeability of reinforcements增强材料的渗透性 Viscosity of resin 树脂粘度 Flow distance 流动距离 Applied pressure difference 压力大小

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Infusion strategies 导入方式
V A

Centre feeding 中心导入 Line feeding 线型导入

A

V

A V

Peripheral Feeding 外围导入 Multiple line feeding 多边导入

A1

A2

V

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General guidelines 指导
Infusion from bottom to top (air entrapments, bubbles)
由底部到顶部导入(避免存留空气,气泡产生)

Resin feed bucket below lowest point in mould (resin rich areas)

树脂桶至于最低点(易形成富树脂层)

Good fit of vacuum bag (avoid running tracks for resin, which may result in air entrapments)
将真空袋服贴至于模具上(避免树脂流痕,或 造成空气存留)
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Core grooves: groove pattern 芯材槽 槽的样式 芯材槽:槽的样式
Groove pattern: Enough to completely fill the laminate, not more than necessary to avoid excessive resin up-take 开槽的数量既要能使树脂充分流入积层,又不能过多,避免吸收多余的树脂 Optimum pattern depends on fibre reinforcement. 根据玻纤增强材料来选择最适宜的芯材开槽方式 ? Standard groove pattern optimised for typical large structural laminates 大型结构产品的积层最好选择标准芯材槽 ? Distance between grooves 20 mm 槽间距离20mm

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Core grooves芯材槽 芯材槽: 芯材槽 Flow speed / flow front 流动速度 流动形状 流动速度/流动形状
? ? ? ?
?

Ideal flow through grooves 树脂在沟槽中流动的理想状态 Narrow groove 狭窄的沟槽 Groove distance 20 mm
槽间距离20mm

? ? ? ?
?

Flow too fast along sawcut channels 在锯切槽中树脂流动过快 Grooves too wide 沟槽过宽 Groove distance 30 mm
槽间距离30mm

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Core grooves芯材槽 perforation 开孔 芯材槽: 芯材槽
Perforation: To assure an even flow on both sides of core 开孔: 要保证树脂在芯材两面的流动是均匀的。 Distance between holes approx. 50 mm, lines offset ? 孔间距离50mm

50 mm

50 mm

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Hole pattern 开孔样式
Bad configuration 不良样式 ? 100 mm distance 间距100mm ? 2 mm hole diameter 直径2mm ? Creating white spots ? 有白色斑点 Good configuration 优良样式 ? 50 mm distance间距50mm ? 2 mm hole diameter直径2mm ? Continuous fibre wet out ? 连续的纤维浸透

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Core grooves: Print through 沟槽纹路印出
? Narrow, deep grooves result in less print-through than wide and shallow grooves
? ? 狭窄且深的沟槽与又宽又浅的 沟槽相比不易有纹路印出

? Print through because of glass fibres

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Applications 应用
? Boat-building造船:
? Various boat-yards have converted to VIP ? 不同大小的船都转而使用树脂导入系统 ? More will follow 更多的造船商会使用此方法

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Applications 应用
? Windmill blade manufacturers:以下是使用真空树脂导入生产风机叶
片的制造商

? ? ? ?

LM Glassfiber GE wind Enercon Suzlon

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Applications 应用

? Road and Rail structure manufacturer 公路和铁路建造商 ? Alcan Airex Composites, Railway cabin 火车车头

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Support of Airex Technical Center Airex 技术中心
? Training in Airex laboratory, on infusion table with glass plate (possibility to monitor resin flow on both sides of sandwich) ? 使用玻璃板面的导入桌在Airex 实验室进行培训, ? Flow studies with various set-ups (reinforcements, resins etc.) 使用各种材料来测试物树脂的流动性能(增强材料,树脂等) ? Mechanical analysis of sandwich panels: Comparison of mechanical properties of sandwich samples. ? 夹芯板的力学性能分析:对不同的夹芯样本的力学性进行比较 ? Support at the customers facility, suggestions, discussions, hands-on etc. 给客户提供支持:建议,讨论, 现场操作

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Vacuum infusion table 真空导入桌

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Boat mould 船模

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DVD André Cocquyt
? ? ? ? Expert boat builder teaching vacuum infusion process 造船专家将在其中讲授真空导入工艺 www.GRPguru.com Has produced a DVD (length 3h 50‘) about the vacuum infusion process, together with光盘附带以下内容:
? ? ? ? Baltek (GPS core) Reichhold (Hydrex HF100 VE resin) Owens Corning (GF reinforcements) Airtech (Vacuum consumables)

? Film about resin infusion at Maverick Maverick的树脂导入影片
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