US 12,491,671 B2
Method of manufacturing a two-wheeler frame
Umut Cakmak, Mödling (AT); and Christian Wolfsberger, Ottensheim (AT)
Assigned to PLASTIC INNOVATION GMBH, Ottensheim (AT)
Appl. No. 17/909,736
Filed by Plastic Innovation GmbH, Ottensheim (AT)
PCT Filed Aug. 25, 2021, PCT No. PCT/EP2021/073474
§ 371(c)(1), (2) Date Sep. 6, 2022,
PCT Pub. No. WO2022/122194, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 102020133019.7 (DE), filed on Dec. 10, 2020.
Prior Publication US 2023/0302694 A1, Sep. 28, 2023
Int. Cl. B29C 45/00 (2006.01); B29C 45/14 (2006.01); B29C 45/17 (2006.01); B29L 31/30 (2006.01)
CPC B29C 45/0046 (2013.01) [B29C 45/14598 (2013.01); B29C 45/14631 (2013.01); B29C 45/1711 (2013.01); B29C 2045/1707 (2013.01); B29C 2045/1713 (2013.01); B29C 2045/1728 (2013.01); B29C 2045/173 (2013.01); B29L 2031/3091 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of manufacturing a two-wheeler frame having tubular frame components comprising at least a steering tube, a down tube, and chain stays, the method comprising:
injecting a plastic melt of a thermoplastic into a cavity of an injection molding tool through at least one plastic injection point; and
subsequently injecting a fluid into the cavity through at least two different fluid injection points disposed in different regions of the cavity corresponding to different tubular frame components to displace a portion of the plastic melt from the cavity and urge the portion of the plastic melt that is displaced out of the cavity through at least one outlet of the cavity, to form an inner hollow space of the tubular frame components;
wherein each of the at least two different fluid injection points is disposed at the injection molding tool below the at least one outlet and a shape of the cavity, a position of the at least one outlet, and a position of each of the at least two different fluid injection points are such that the fluid flows only in an upward direction in the cavity from each of the at least two different fluid injection points to the at least one outlet.