RAPIIT Co., Ltd.

Molding Development of CFRTP wheels by stamping molding

Technical Classification:
[ Molding ]
[ Products / Processed Products ]
[ continuous fiber reinforced material moldingtechnology ] [ Integrated molding ] [ reduction of the number of parts ] [ weight reduction ]

Point of the Proposed Technology

・Use of thermoplastic composite fiber reinforced materials enables a substantial weight reduction compared to use of high-tension steel sheets or aluminum materials                 
・Stampable molding has enabled change in thickness, formation of ribs, etc. according to a required shape, thus realizing integrated molding.             
・Enhancement of strength by the technology for flowing continuous fiber materials into every corner of a mold
・Insert molding of metal fittings or the like is also possible


・Weight reduction by 30 to 45% in comparison with cast aluminum wheels
・Significant shortening of molding time in comparison with carbon fiber reinforced thermoplastic composite (CFRP ) wheels
・It is possible to make an integrated structure from a bonded structure with more parts in comparison with a CFRP wheel (by reduction of the number of parts and reduction/elimination of the bonding process, etc.)     

Conventional Technology

New Technology

☆It has realized integrated molding, at a shot, of a CFRTP (carbon fiber reinforced thermoplastic composite) carbon wheel by stamping molding.
☆Weight reduction by 37% has been achieved in addition to high mechanical strength that passes the aluminum wheel standards (the JWL standard).

Technology Deployment and Cooperation

Development Stage
Development Stage (to be completed in 2018/10; progress: 90%)
Intellectual Property Right
Joint Researchers (their role)
Example of Application
Automobiles, aircrafts, medical devices, general industrial parts, etc.
Technical Problems
・Using thermoplastic composite fiber materials, high-strength and lightweight members are realized, which was impossible by injection molding.
・Since it allows the consideration of molding parts not in units of sub-parts but in units of welded and assembled products, a substantial weight reduction and reduction of the number of parts can be expected.
Collaborator needed to Improve
Universities and businesses having knowledge about composite fiber flowing technologies or material technologies
Public institutions and research organizations including universities having strength assessment technologies andequipment
Technical WEB page


Personnel / Department
/ Representative director, Takuro Shigetomo
50-19 Osegi, Akaiwa-shi, Okayama, 709-0717 Japan
Inquiry Form

Outline of Company and Organization

50-19 Osegi, Akaiwa-shi, Okayama, 709-0717 Japan
Capital / No. of Employees
10,000,000 yen / 28 employees
Product Line
Trial production of automobile sheet metal parts, trial production of composite material molding
Major Customers
Fiber or resin manufacturers, automobile parts manufacturers
Overseas Base(s)
Company/Organization WEB page

Update date: 2020/2/26

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