Abstract:
Station de production (1) comprenant au moins deux premiers (11a, 11b) demi-moules, un deuxième demi-mode (21a, 21b), un dispositif de chauffage et une première matrice d'estampage (16), chacun des premiers demi-moules (11a, 11b) présentant une position d'estampage dans laquelle ledit premier moule coopère avec la première matrice d'estampage (16), de manière à pouvoir former par estampage d'une première plaque en matière thermoplastique une première partie de pièce dans le premier demi-mode 11a, 11b), chacun des premiers demi-moules (11a, 11b) étant déplaçable vers une position de soudure dans laquelle ledit premier demi-moule (11a, 11b) coopère avec le deuxième demi-moule (21a, 2.1 b), de manière à souder une première zone de soudure de la première partie de pièce à une première zone de soudure d'une deuxième partie de pièce reçue dans le deuxième demi-mode (21 a, 21 b), l'un des premiers demi-moules (11a, 11b) étant en position d'estampage pendant que l'autre est en position de soudure.
Abstract:
A forming apparatus for forming objects (32) by forming a sheet of thermoformable material (2), comprises a thermal conditioning station (5) including a kiln (6) for heating the material (2) to an operating temperature, and a heating station (8) positioned downstream of the thermal conditioning station (5) and including heating means (9) to heat set portions of the material (2) to a temperature near a softening temperature of the material (2). In order to reduce reject material (2) at the restart of the apparatus (1) following a machine downtime, the kiln (6) and the heating means (9) are positioned near one another in such a manner that a part (11) of the material (2) interposed between the thermal conditioning station (5) and the heating station (8) is heated by the heat generated by kiln (6) and/or by the heating means (9). A heating station and a method for heating set portions (23) are also disclosed.
Abstract:
Apparatus and methods of forming selected portions of integral sheets of material are disclosed. The apparatus (10) comprises a mould (14) from which plugs protrude, means for positioning a plastic material adjacent the mould (14), the plastic material defining integral first and second regions, and means (18) for selectively heating the first region to its forming temperature while maintaining the second region at less than its forming temperature when the plastic material is positioned adjacent the mould (14). The selective heating means (18) include a source of energy and an energy sink that has a depth and at least one cut-out extending through the depth. The mould (14) is evacuated and the selective heating means (18) thermoform the first region but not the second region following evacuation of the mould (14) so that unformed portions of the sheets may remain undistorted during the forming process, allowing them to contain text, art work, or other desired information without material risk of the information being degraded or becoming unintelligible during the forming process.
Abstract:
A method and a plant for twin-sheet thermoforming of fuel tanks; first and second sheets (SA, SB) of thermoformable plastic material, are separately fed along respective processing lines (10A, 10B). The sheets (SA, SB) are heated and gripped along their peripheral edges by a pneumatically actuate suction and vacuum holding device (15A, 15B), for supporting the heated sheets (SA, SB) in a substantially flat condition while they are moved towards a respective thermoforming station (16A, 16B). Both the molds (17A, 17B) are disposed side by side with their open cavity facing upwards. After thermoforming of the plastic sheets (SA, SB), one of the molds (17B) is turned upside down onto the other mold (17A), to overlap and weld superimposed sealing areas of the two thermoformed shells (GA, GB). Cooling of the molds and thermoformed tank may be performed on a side of the processing lines (10A, 10B).
Abstract:
A method and a plant for twin-sheet thermoforming of fuel tanks; first and second sheets (SA, SB) of thermoformable plastic material, are separately fed along respective processing lines (10A, 10B). The sheets (SA, SB) are heated and gripped along their peripheral edges by a pneumatically actuate suction and vacuum holding device (15A, 15B), for supporting the heated sheets (SA, SB) in a substantially flat condition while they are moved towards a respective thermoforming station (16A, 16B). Both the molds (17A, 17B) are disposed side by side with their open cavity facing upwards. After thermoforming of the plastic sheets (SA, SB), one of the molds (17B) is turned upside down onto the other mold (17A), to overlap and weld superimposed sealing areas of the two thermoformed shells (GA, GB). Cooling of the molds and thermoformed tank may be performed on a side of the processing lines (10A, 10B).
Abstract:
Plant and method for the production of polyurethane articles covered with a film. The plant comprises a molding apparatus (13) of the open-mold type and associated with press elements (29, 30) and a casting head (14) to cast the polyurethane. The plant further comprises a movable transport plane (28) suitable to pick up a segment of film and transfer it from a preparation and cutting position to a position wherein there is one molding apparatus (13), in order to position the segment of film in one of the elements of the mold, heating means able to heat the segment of film before it is inserted into the mold, and an automatically driven casting head (14) suitable to cast the polyurethane into the relative molding apparatus (13). The whole is arranged on a base (18) equipped with air suction means (42) cooperating with delivery means (39).
Abstract:
Es wird ein Formwerkzeug (20) genutzt, das eine stationär angeordnete Werkzeugwanne (60) und eine darauf zu absenkbare sowie davon weg anhebbare Druckglocke (50) hat. Es wird eine Anordnung geschaffen, in welcher ein ein- oder mehrlagiger, anfänglich ebener, flexibler Schichtstoff (10) den Wanneninnenraum (65) druckdicht vom Druckglocken-Innenraum (55) trennt. Innerhalb des Wanneninnenraums (65) nimmt ein Tisch (80), auf dem sich das zu kaschierende 3D-Substrat (3) befindet, eine abgesenkte Stellung ein; es besteht ein erheblicher, freier Zwischenraum (90) zwischen Schichtstoff (10) und 3D-Substrat (3). In diesen Zwischenraum (90) wird eine Heizstrahler-Anordnung (100) eingebracht, die einen Träger (1 12) hat, auf dessen Oberseite (114) aktivierbare Heizstrahler (115) angebracht sind, und an dessen Unterseite (117) aktivierbare Heizstrahler (118) angebracht sind. Durch Aktivierung der Heizstrahler (115) kann gezielt der Schichtstoff (10) angestrahlt und erwärmt werden, insbesondere auch ein an der Unterseite des Schichtstoffes (10) befindlicher Kleber aktiviert werden. Durch Aktivierung der Heizstrahler (118) kann gezielt das SD-Substrat (3) angestrahlt und erwärmt werden. Eine solche Erwärmung erfolgt zu einem Zeitpunkt, zu dem je der Druckmitteldruck im Wanneninnenraum (65) und im Druckglocken-lnnenraum (55) auf einen Wert kleiner/gleich 30 kPa abgesenkt ist. Nach Beendigung der Erwärmung wird die Heizstrahler-Anordnung (100) oder werden deren Teile (102, 104) in Rückzugsräume (67', 67") verfahren, die in je einem Kasten (66', 66") ausgebildet sind, die an gegenüberliegende Seitenwände (62', 62") der Werkzeugwanne (60) angesetzt sind. Typischerweise sind horizontal oder weitgehend horizontal ausgerichtete Rückzugsräume (67', 67") vorgesehen.