Thermoformed component with integral attachment structure...

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 19/24 (2006.01) B21D 5/06 (2006.01) B60R 19/18 (2006.01)

Patent

CA 2725422

A thermoforming process capable of coining and flowing material is provided, such as for making a thermoformed energy absorber for self-attachment to a vehicle bumper beam. The energy absorber includes a thermoplastic sheet with first thickness shaped by a thermoforming process to include a base and lobes configured to absorb energy. The sheet further has integrally formed attachments with solid heads formed from material flowed from adjacent areas into the attachment during the thermoforming process. Many other structures can be formed, such as ringed ridges, thinned regions, snap-attachments, hooks, living hinges, bosses, and the like. The present invention further includes an apparatus and a method for accomplishing the above, such as a heater for heating the sheet, and a die for stretching and shaping the sheet, where heated material is flowed by opposing coining die components to form selectively-shaped 3D structures.

La présente invention concerne un procédé de thermoformage pouvant estamper et faire s'écouler un matériau, notamment pour fabriquer un absorbeur d'énergie thermoformé pour une fixation automatique à une poutre de pare-chocs de véhicule. L'absorbeur d'énergie comprend une feuille thermoplastique ayant une première épaisseur formée par un procédé de thermoformage pour inclure une base et des lobes conçus pour absorber l'énergie. La feuille comprend en outre des fixations intégrées dotées de têtes solides formées à partir du matériau s'écoulant à partir des zones adjacentes dans la fixation lors du procédé de thermoformage. De nombreuses autres structures peuvent être formées, telles que des nervures annulaires, des régions amincies, des fixations à bouton-pression, des crochets, des charnières mobiles, des bossages et analogues. La présente invention comprend en outre un appareil et un procédé pour accomplir ce qui précède, notamment un élément chauffant pour chauffer la feuille et une matrice pour étirer et mettre en forme la feuille, le matériau chauffé s'écoulant par des composants de matrice d'estampage opposés afin de former des structures en 3D à forme sélective.

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