Foboha Gmbh

Werner Bodmer

Rainer Armbruster

Udo Bodmer

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

Device for manufacturing articles made of plastic

In a method for the internal cooling of a rotating object ( ), liquid gas from at least one inlet channel ( ) in a fixed object ( ) is pressed into a ring-shaped groove ( ) located between the fixed object ( ) and the rotating object ( ). From the ring-shaped groove ( ) the liquid gas is pressed into at least one channel ( ) in the rotating object ( ) and brought to a part to be cooled ( ). 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 ( ) may be designed as an expansion chamber ( ). The method can be used to cool molded parts in injection molding machines with rotating molds ( ), thereby achieving shorter cycle times.

Internal cooling with liquid gas

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

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Haslach, Germany

Werner Bodmer