Blow-molding unit for synthetic plastic materials
AssigneeBekum Maschinenfabrik GmbH
InventorsManfred Hedke, Uve-Volker Roos, Hermann Reuel
Life of this patent
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Abstract
The novel blow molding unit has mold sections movable toward and away from each other between open and closed positions. A motion-imparting arrangement is coupled with the mold sections for moving them between these positions. A clamping arrangement is located upwardly of the points where the motion-imparting arrangement is coupled with the mold sections and serves to bias the mold sections towards one another either when they are in the closed position or just before they reach the same.
Claims8
In a blow-molding unit for blow-molding synthetic plastic objects, a combination comprising a pair of assemblies, each including an upright mold section and a lower part below said mold section;
- guide means extending through at least one of said lower parts and being operative for guiding said assemblies in substantial parallelism toward and away from each other between a closed position in which said mold sections meet in an upright parting plane and confine a synthetic plastic object between themselves, and an open position in which said mold sections define between themselves a free space and in which free relative movement of said mold sections and of the object in a predetermined direction can occur so that the object is no longer confined between said mold sections;
- single motion-imparting means coupled with said assemblies located outside said free space above said guide means and operative for moving said assemblies between said open and cosed positions of said mold sections and for producing, when said mold sections are in said closed position thereof, the forces necessary for counteracting the pressure of a blowing medium during the blow-molding of the synthetic plastic object and for actuating clamping means located above said motion-imparting means and operative for biasing said mold sections towards one another when or slightly before said mold sections have arrived at said closed position, said clamping means comprising two cooperating clamping parts each provided on a different one of said assemblies and projecting from the same toward the respective other assembly by a distance which is small enough for said clamping parts not to interfere with said free space and with the relative movement of said mold sections and said object in said direction when said mold sections are in said open position thereof.
In a blow-molding unit for blow-molding synthetic plastic objects, a combination comprising a pair of assemblies, each including an upright mold section and a lower part below said mold section;
- guide means extending through at least one of said lower parts and being operative for guiding said assemblies in substantial parallelism toward and away from each other between a closed position in which said mold sections meet in an upright parting plane and confine a synthetic plastic object between themselves, and an open position in which said mold sections define between themselves a free space and in which free relative movement of said mold sections and of the object in a predetermined direction can occur so that the object is no longer confined between said mold sections;
- single motion-imparting means coupled with said assemblies located outside said free space above said guide means and operative for moving said assemblies between said open and closed positions of said mold sections and for producing, when said mold sections are in said closed position thereof, the forces necessary for counteracting the pressure of a blowing medium during the blow-molding of the synthetic plastic object and for actuating clamping means operative above said motion-imparting means for biasing said mold sections towards one another when or slightly before said mold sections have arrived at said closed position, said clamping means comprising an arresting portion provided on one of said assemblies and a pivotable member on a support coupled with said motion-imparting means and said one assembly, said member being pivotable from a locking position where said member is in arresting engagement with said arresting portion and extends wholly above said motion-imparting means and parallel to said guide means, and an open position where one end of said member is pivoted so as not to interfere with said free space and with the relative movement of said mold sections and said object in said direction when said mold sections are in said open position thereof, said arresting portion always being positioned outside said free space.
Dependencies are inferred from the claim text.