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US 6,203,747 B1Granted
Resonating injection molding machine and process for its operation
AssigneeMannesmann Aktiengesellschaft
InventorOtto Grunitz
Life of this patent
Estimating the term…
Abstract
An injection molding machine includes an injection molding cylinder with a material supply at one end and an injection nozzle at the other end and a material conveyance unit attached to a drive and movable in the injection molding cylinder. The injection molding machine also includes a vibration element for inducing a flow of melt within the injection molding cylinder for homogenizing the melt.
Claims18
An injection molding machine for homogenizing a melt and injecting the melt into a mold, comprising:
- an injection molding cylinder having a foot end and a head end with a funnel-shaped material supply at said foot end and an injection nozzle connectable with the mold at said head end;
- a material conveyance unit attached to a drive and movable in the interior of the injection molding cylinder for urging the melt through said injection nozzle;
- a vibration element connected to said injection molding cylinder for producing a relative movement between said injection molding cylinder and said material conveyance unit for generating a flow of the melt in said injection molding cylinder for homogenizing the melt;
- a frequency generator operatively connected to said vibration element for adjusting a frequency of vibration of said vibration element such that said injection molding cylinder connected to said vibration element is movable in a resonance vibration;
- said injection molding cylinder being vibrationally decoupled from the mold while said injection nozzle is connected with the mold.
2 more elements
A process for guiding a melt in an injection molding machine, comprising the steps of:
- introducing a melt into an injection molding cylinder via a material supply between an injection nozzle of the injection molding cylinder and a material conveyance unit attached to a drive and movable within the injection molding cylinder;
- operating a vibration element mounted on the injection molding cylinder at a frequency within an ultrasound range for exerting a transversal relative movement between the injection molding cylinder and the material conveyance unit for creating a force that excites the flow of the melt and homogenizes the melt in the injection molding cylinder;
- vibrationally decoupling the injection cylinder from a mold:
- and while operating the material conveyance unit for urging the mixed melt into the mold.
1 more element
Dependencies are inferred from the claim text.