RTM shapes technology

RTM shapes technical fundamental is will fibre glass or other enhance data shop to put the modular pitch that shuts a model inside, with pressure (or vacuum assist a ruler in governing a country) write colophony glue fluid modular speech, permeate enhance a data, next solidify, drawing of patterns shapes finished product. RTM shapes the technology is from wet lay up and 1 kind of when the technology that note model evolves and come new complex materials shape technology. RTM technology is applied commonly enhance data method to have short cut fiber felt, successional fiber felt, three-dimensional fabric or tailor-made compound felt to wait, the breed that enhances a data has fiber of fibre glass, fragrant black silk ribbon, carbon fiber to wait. The RTM that chooses colophony of not saturated polyester to be matrix shapes the technology already got applied extensively now, to colophony system, enhance a data to spread Fu, stream change design of character, mould is made, finished product is tectonic the respect such as design, special device has a system to deepen delibrate.

And phenolic aldehyde colophony is used at RTM technology to just appear in last few years in home. Does RTM produce does the technology request colophony to give or take an injection commonly is the viscosity below temperature 250-500 Mpa about? S, in order to make fiber can be permeated immediately, prevent lay up or fabric construction to be destroyed. Colophony solidify process should be done not have or cut down young member to happen as far as possible, in order to cut down finished product defect, progress all sorts of functions. Because traditional phenolic aldehyde colophony passes condensation solidify, there is young member to give off in solidify process, form finished product defect simply, so technology of not quite appropriate RTM shapes.

Home shapes to phenolic aldehyde and RTM of colophony of other tall function now technical need is principal come from commodity of for military use. But because of colophony of phenolic aldehyde of lack appropriative RTM, the phenolic aldehyde resin that can use a convention only undertakes giving or take an injection, pressurization way still is chosen when solidify, already developed a lot of finished product now now, obtained better function. RTM already became aerospace to precede complex material shapes basically now one of technologies. A surname of 3 rivers group averages the person such as the river, use RTM shapes technical measure, use resin of ammoniac phenolic aldehyde compound excel in fibre glass is three-dimensional weave system, take leave of made test piece of ablation of acetylene of tensile strength test piece, labyrinthian intensity test piece, oxygen, the fiber bulk content of test piece is 55% . The function checks achievement to be: Tensile strength is 744MPa, drawing model quantity is 40.6GPa, craze meet an emergency 2.07% , labyrinthian intensity is 456.4MPa, labyrinthian model measures 31.8GPa, its are mechanical the function is close to Yu Gang, ablation function is greatly good mix at mould pressing surround complex material. The person such as Feng Zhihai also was made in this respect deepen delibrate, in applying at commodity to produce. Outside dividing traditional ammoniac phenolic aldehyde, the colophony of tall carbon phenolic aldehyde that Huadongli is versed in the university is developed also is the colophony of modified ammonia phenolic aldehyde that develops to RTM technology, its have higher carbolic content, wider technology operates platform. But the condensation solidify way that still chooses a tradition, have young member release, need to choose pressurization to shape.

To be used to the need of special type good, colophony of phenolic aldehyde of development RTM special modified becomes delibrate popular. The phenolic aldehyde of modified of cyanic acid ester that courtyard of steel of Bo of the phenolic aldehyde of Xi propyl modified of delibrate of place of chemistry of Chinese Academy of Sciences and colophony of double horse copolymerization, Beijing develops (phenolic 3 Qin) , the open loop phenolic aldehyde of Sichuan university delibrate (benzene is evil Qin) all represent for its. Domestic other unit also did a lot of works on the development of afore-mentioned breed, obtained wonderful action. But to system of phenolic aldehyde colophony give or take an injection technology, shed the delibrate that becomes characteristic to wait for a respect, had not deepened undertake.

Breed of finished product of phenolic aldehyde RTM is very much, for instance missile nose awl, wildcat is in charge of piston and car to use a part, the measure that can develop phenolic aldehyde finished product adequately is smooth and steady, fight creep, flame retardant and high temperature is mechanical the function is good wait for an advantage. Foreign WES plastic company uses RTM technology, made goods of a lot of war industry.

A lot of companies undertook ameliorative to RTM equipment now, so that use,will produce finished product of phenolic aldehyde glass reinforced plastics.




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