JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 64

KNOW-HOW
Induction
g…/… New process for high-temperature carbon fibre moulding

3iTech® as applied to different composite processes: differences, advantages and limits in comparison to a standard heating process
RTM moulding of parts
Differences with a standard process: it is possible to 1) achieve different temperature thresholds, 2) inject at low temperatures and cure at high temperatures to accelerate the cure cycle, and 3) remove the cooled part without need for cooling jig or cooling die. Advantages: considerably reduced cycle times (about 3 minutes for some epoxy or PU resins, improved part surface quality, significantly lower production costs. Limits: for very large parts (larger than 4-5 m²), it would be difficult to achieve a heating time of just a few seconds at only medium power.

Fig. 5: Iphone carbon shell Production cycle time: 3 mn; Energy consumption: 5 Kva for 60 sec. (temperature ramp up time from 60°C to 230°C)

case of plastic injection are lower, continuous control throughout the cycle is to be preferred. Another more efficient variant consists in circulating the water around the inductor in a cycle, based on whether it is in a cooling or a heating phase. To conclude, all types of cooling method (Fig. 6) can be integrated, with the temperature control circuit: - behind the heating network (standard configuration); - level with the heating network (configuration to optimize cooling effect); - in front of the heating network (to assist the cooling effect).

Production of thermoplastic and thermoset prepreg parts without sheet stamping
The 3iTech® process has major advantages due to its carbon-fibre moulding capabilities, including at high temperatures. For thermoplastics, it is possible to start directly from a flexible fabric without need for a pre-consolidated sheet. Differences with a standard process for thermosets: it is possible to achieve temperature thresholds and accelerate the cure phase. Differences with a standard process for thermoplastics: use of a flexible fabric and no need to preheat the material and transfer into cold mould. Advantages: significant reduction in cycle times and cost of parts. The aeronautical industry could perceive another advantage besides cost, since aeronautical equipment manufacturers use a large number of moulds. Because the moulds can be heated up almost instantly, the start-up time for the moulds and potential changes are determining factors. Limits: the technology is inadequate for very large parts, and the production volumes involved must be large enough to justify

Cooling network

Heating network
Fig. 6: Finite element analysis - 3iTech® RTM mould

Thermomechanical studies were carried out with all these combinations in mind to ensure optimized tooling design with respect to the thermal and mechanical stresses involved. Mould design will factor in heat expansion aspects that can lead to thermal fatigue, which can be controlled through actions such as targeted heating of the moulding area, a suitable choice of steel, or applying suitable coatings.
Fig. 7: Finite element analysis - 3iTech® thermocompression mould

64

jec composites magazine / No58 June-July 2010



JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010

Cover
Editorial
Market Place
Advertisers
Index
Contents
NEWS WORLDWIDE
- Companies
- Innovations
- Agenda of events
BUSINESS
- Market survey
- Trends
- Human Capital
FEATURE - AERONAUTICS
- Market
- Nano
- Simulation
- Fibre placement
- Assembling
- Thermoplastics
USERS' PLATFORM
- Composites in the world
- Successful Partners
- Civil Engineering
KNOW-HOW
- Reinforcement
- RTM
- Induction
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Cover
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 2
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Editorial
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Market Place
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Index
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - Contents
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 7
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Companies
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 9
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 10
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Innovations
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Market survey
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 15
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 16
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 17
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Trends
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 19
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Human Capital
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - FEATURE - AERONAUTICS
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Market
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 23
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 24
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 25
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 26
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 27
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Nano
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 29
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Simulation
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 31
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 32
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 33
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 34
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 35
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 36
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 37
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Fibre placement
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 39
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 40
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 41
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Assembling
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 43
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 44
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Thermoplastics
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 46
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 47
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 48
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 49
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 50
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - USERS' PLATFORM
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Composites in the world
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Successful Partners
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Civil Engineering
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 55
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 56
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Reinforcement
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 59
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - RTM
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 61
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - - Induction
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 63
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 64
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 65
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 66
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 67
JEC COMPOSITES MAGAZINE - Issue #58 - June - July 2010 - 68
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