摘要:
Les articles façonnés sont fabriqués à partir d'une fine bande (2) de matériau plastique orientable par estampage de la bande entre deux matrices (15, 33) ayant des profils complémentaires, lesdites matrices étant véhiculées par des plaques parallèles (6, 26) dont l'une au moins est mobile par rapport à l'autre, de sorte à comprimer la bande de plastique autour de la zone devant être estampée ou emboutie. Une (27) des plaques (6, 27) comprend une partie fixe (29, 30) à laquelle est fixée une (33) des matrices (15, 33) et qui sert de support élastique à une plaque mobile (47) s'associant avec une (6) des plaques (6, 27) pour comprimer la bande de plastique durant l'interpénétration des matrices (15, 33) qui déforment en permanence localement la bande de plastique.
摘要:
A thermoforming machine for forming articles from a thermoplastic sheet, comprising means defining a thermoforming zone, means for transporting a sheet of thermoplastic material into the thermoforming zone, means for heating the sheet of thermoplastic material to render it capable of being thermoformed in the thermoforming zone, the thermoforming zone comprising a forming surface (3, 4) corresponding to the shape of the article to be formed, means 23 for applying a differential pressure to opposite sides of the thermoplastic sheet material in the thermoforming zone to cause the sheetto conform to the shape of the moulding surface, and a die (7, 8) disposed around the moulding surface to sever the formed article from the thermoplastic sheet on completion of the moulding operation, characterized in that the moulding surface (3, 4), is formed in two parts, a first part including a die surface (7) of the said cutting die, and a second part (3) adapted to move relative to the first part to permit the formed article to be severed from the sheet without the formation of a peripheral lip, and without damage to the formed articles.
摘要:
Die Erfindung betrifft ein Tiefziehverfahren zur Herstellung geformter Kunstsoffelemente wie ausschäumbarer Kraftfahrzeug-Verkleidungen aus einer tiefziehbaren thermoplastischen Kunststoffolie, bei dem die von einem Spannrahmen gehaltene Folie bis auf die Warmformtemperatur erwärmt und in einer dem Formwerkzeug entsprechenden allgemeinen Kontur vorformend gewölbt wird, worauf das Formwerkzeug in die Wölbung der vorgeformten Folie eingefahren und diese durch Erzeugung eines Druckunterschiedes zwischen Folie und Oberfläche des Formwerkzeuges an diesem endverformt und nach Abkühlung von diesem abgenommen wird, wobei man vor dem Endverformen einen Dickenbereich der Folie an deren Rückseite durch Erhitzen mittels hoher Strahlungsintensität in den plastischen Temperaturbereich des Kunststoffes bringt.
摘要:
Eine Stapelstation (100) für eine Thermoformanlage (150) ist so ausgebildet, dass ein Drehwinkelversatz (102) zwischen aufeinanderzustapelnden Produkten (152A, 152B) erzeugt werden kann. Damit ist die Stapelung von ansonsten identischen Produkten, die etwa an identischen Positionen ausgebildete Abstandsnoppen (153A) haben, in effizienter Weise möglich.
摘要:
A process for thermoforming a plate-like element (10) of composite polymer material, in which a central region (11) and a peripheral region (12) are defined, comprising: - providing a mould (1) including a male member (3) and a female member (4) which may be displaced between an operating position in which they are pressed against one another, and a non-operating position in which they are spaced from one another, - disposing said plate-like element(10) on said mould such that its central region (11) is interposed between said male member and said female member and holding it at its peripheral region (12) while said male member (3) and said female member (4) are displaced towards the operating position in order to abut against and deform the plate-like element, - completing the displacement of the male member and the female member into the operating position and maintaining them in that position for a predetermined period of time, - displacing the male member and the female member into the non- operating position in order to remove the thermoformed plate-like element from the mould. The plate-like element(10) is held in its peripheral region (12) by a plurality of pins (7) having a free end associated with the mould and engaged in a corresponding plurality of holes (13) obtained in its peripheral region. The pins (7) are disposed on a mobile frame (6a) which may be removed from the mould(1) in order to move the plate-like element to and from the mould, while said plate-like element is held by the pins (7).
摘要:
A trim panel for a vehicle is formed with a pinch-sealed edge by compression molding. The mold is designed with one or more cutting surfaces that compress or pinch the trim panel material to the point of severing the trim panel to form a tightly compressed and cut edge.
摘要:
The containers are thermoformed in a thermoforming station (29) from pellets (16) cut from a strip of thermoplastic (10). Before the containers (29) are thermoformed, the pellet regions of the strip (10) are heated, the hot pellets (16) are cut out from the heated region and the hot pellets are conveyed to the thermoforming station (20).