Abstract: The invention relates to a device and a method for producing plastic moldings from at least two different sub-elements (15; 16) that includes first and second mold halves (3) and a rotatable center block (6) with center and third mold halves (8; 17) interposed therebetween. The center and third mold halves define first and second parting planes with the first and second mold halves. First cavities are defined in the first parting plane, into which a first plastic component is introduced to produce preforms (12). When the first parting plane is opened, the performs (12) remain on the center mold halves (8) and are brought into the second parting plane when the center block (6) is rotated, in which second parting plane second cavities are at least partially defined by the preforms (12), into which a second plastic component is introduced and first sub-elements (15) are produced. Second sub-elements (16) are produced in the additional cavities.

Abstract: The invention relates to a rotation device (1) for rotating the center part (2) in an injection-molding device. The rotation device comprises a column (3) which is non-rotatably mounted in the interior of the center part (2) and a sleeve (4) surrounding the same which is mounted such as to rotate with the center part (2), said sleeve (4) and said column (3) being operatively interconnected via a drive.

Abstract: The invention relates to a device and a method for producing plastic moldings from at least two different sub-elements (15; 16) that includes first and second mold halves (3) and a rotatable center block (6) with center and third mold halves (8; 17) interposed therebetween. The center and third mold halves define first and second parting planes with the first and second mold halves. First cavities are defined in the first parting plane, into which a first plastic component is introduced to produce preforms (12). When the first parting plane is opened, the performs (12) remain on the center mold halves (8) and are brought into the second parting plane when the center block (6) is rotated, in which second parting plane second cavities are at least partially defined by the preforms (12), into which a second plastic component is introduced and first sub-elements (15) are produced. Second sub-elements (16) are produced in the additional cavities.

Abstract: A device (1) and method for injection molding articles (25) with several plastic material components. The device (1) includes a fixed, first half mold (3), a second half-mold (6) that is movable relative to the first half-mold (3) for the purpose of opening and closing the device (1). The device also includes at least two further half-molds (10, 11), which are jointly movable relative to the first and second half-molds (3, 6), and which, in the closed position of the device (1), are situated between the first and the second half-molds (3, 6) such that cavities are formed in each of a first and a second parting plane (32, 33). The two further half-molds (10, 11), which are jointly movable, include a device (22), which in the case of an opened device (1) serves to transport the article (25) out of a first cavity (21.1) into a second cavity (21.2) so that the article (25) can be injection molded around with a further material component in the second cavity (21.2).

Abstract: In a method for the internal cooling of a rotating object (4), liquid gas from at least one inlet channel (61) in a fixed object (5) is pressed into a ring-shaped groove (62) located between the fixed object (5) and the rotating object (4). From the ring-shaped groove (62) the liquid gas is pressed into at least one channel (63, 64.1, 64.2) in the rotating object (4) and brought to a part to be cooled (15). The liquid gas, upon contact with the part, evaporates and expands while absorbing heat, thereby cooling the part. The area surrounding the part to be cooled (15) may be designed as an expansion chamber (65). The method can be used to cool molded parts in injection molding machines with rotating molds (1), thereby achieving shorter cycle times.

Abstract: A holding device (1) for injection molding mold halves (61.2) or their holders contains two displacement units (2.1, 2.2), on each of which a rotation unit (4.1, 4.2) is attached. On each rotation unit (4.1, 4.2) there are holders (5.1, 5.2). Into the space (d) between the two holders (5.1, 5.2) a die holder designed as a prism-shaped rotating block can be inserted. The die holder in the holding device (1) can be displaced in one direction (z) and can be rotated around a displaceable axis (42.1, 42.2), which is vertical to the one direction (z). The displacement units (2.1, 2.2) can be displaced relative to one another to permit rapid and easy changing of injection molding molds (62.1).

Abstract: A multilayer tube shoulder and method for manufacture wherein a first material component is injected into a cavity (22) and then removed from the cavity on a support (12) while in a partly-plastic state. Thereafter, following insertion of the first material component into a second cavity (23), a second material component is injected around the first material component, and thereby leads to a positive connection between the first and second material components.

Abstract: A method for manufacturing a multilayer tube shoulder wherein a first material component is injected into a cavity (22) and then removed from the cavity on a support (12) while in a partly-plastic state. Thereafter, following insertion of the first material component into a second cavity (23), a second material component is injected around the first material component, and thereby leads to a positive connection between the first and second material components.

Abstract: The invention is related to a device (1) and to a method for the injection molding of articles (25) with several plastic material components. This device (1) comprises a first half mold arranged as fixed (3), a second half-mold (6) arranged as movable relative to the first half-mold (3) for the purpose of opening and closing the device (1). In addition, the device (1) comprises at least two further half-molds (10, 11), which are arranged as jointly movable relative to the first and second half-molds (3, 6), and which in the closing position of the device (1) are situated between the first and the second half-molds (3, 6), so that in two parting planes (32, 33), namely in a first and in a second parting plane (32, 33), cavities (20, 21) are formed. The two further half-molds (10, 11) arranged as jointly movable comprise means (22), which in the case of an opened device (1) serve for the transportation of the article (25) out of a first cavity (21.1) into a second cavity (21.