Method and device for blow molding a plastic tank with at least one connection element penetrating the tank wall
AssigneeVolkswagen Aktiengesellschaft
InventorsRalf Berlin, Claudia Mientkewitz
Life of this patent
Estimating the term…
Abstract
A method for blow molding a plastic tank from thermoplastic material, wherein the plastic tank is provided with at least one connection element penetrating the wall of the plastic tank while the plastic tank is being shaped within a blow molding tool. The connection element is fitted onto a blowing needle of the blow molding tool and is positioned in the wall by punching in the blowing needle. Also disclosed is a blow molding tool for use in the method having a blowing needle formed to fit a connection element.
Claims8
A blow molding tool for blow molding a plastic tank comprising:
- a plurality of tool parts enclosing a shaping cavity,
- wherein at least one of the plurality of tool parts includes at least one displaceable blowing needle, which is punched into a preform for the purpose of inflating the preform located in the cavity,
- wherein the blowing needle fits a connection element to position the connection element in the wall of the plastic tank to be produced by punching in the blowing needle, and
- wherein the blow molding tool further comprises a retaining portion for the connection element that is delimited by an axial stop and a head portion which projects beyond the fitted connection element and in which at least one blowing-air opening is located.
A method for blow molding a plastic tank from thermoplastic material, wherein the plastic tank includes at least one connection element penetrating the wall of the plastic tank while the plastic tank is being shaped within a blow molding tool, the method comprising:
- fitting the connection element onto a blowing needle of the blow molding tool;
- and
- positioning the connection element in the wall by punching in the blowing needle,
- wherein the blowing needle with the fitted connection element is moved at a speed of at least 0.50 m/s during the punching in operation.
Dependencies are inferred from the claim text.