Ejector device
AssigneeAplicator System AB
InventorKjell Sand
Life of this patent
Estimating the term…
Abstract
An ejection nozzle for transport of fiber thread pieces by means of compressed air, e.g. reinforcement material for manufacturing fibre reinforced plastic products, from a cutter to a moulding cavity. The nozzle is provided with a common flow duct for the compressed air and the fibre thread pieces. The flow duct runs past at least one reflector surface (15) for the air flow, and at least one opening (16) for evacuation of air to the surroundings is located along the flow duct.
Claims8
An ejection nozzle for transport of fiber thread pieces by compressed air, the ejection nozzle comprising:
- a flow duct comprised of a series of damper units, each damper unit including a first tube on the inlet side of the damper unit and having a larger cross section, a second tube on the outside of the damper unit and having a smaller cross section, and a damper unit body between the first and second tubes, the body having a tapering cross section in the flow duct such that each damper unit has a greater cross section for air flow from the inlet side upstream and a smaller cross section for air flow from the outlet side and toward downstream;
- the damper units being arranged in series with the second tube of each unit extending into the first tube of the adjacent unit downstream, the second tubes being so supported and positioned on the respective ones of the first tubes as to permit airflow to exit the duct as the junction between one of the second tubes and the respective one of the first tubes into which the second tube extends, and to permit the air to flow upstream out of the duct past the then upstream damper unit.
An ejection nozzle for transporting fiber thread pieces by means of compressed air comprising a plurality of composite ducts arranged in series coaxially, each composite duct comprising:
- a first cylindrical duct, having an inlet end and an outlet end and a first diameter,
- a second cylindrical duct, having an inlet end and an outlet end and a second diameter smaller than the first diameter, and
- a conical transition duct connecting the outlet end of said first cylindrical duct with the inlet end of said second cylindrical duct,
- wherein, for each of the serially arranged composite ducts except for the composite duct at the end of the series, the outlet end of said second cylindrical duct extends into the inlet end of said first cylindrical duct of the composite duct immediately downstream thereof;
- wherein the last said second cylindrical duct in the direction of flow is of smaller diameter than said second cylindrical duct immediately upstream thereof;
- and
- wherein the ejection nozzle is provided with at least one opening for evacuating air.
An ejection nozzle for transporting fiber thread pieces by means of compressed air comprising a plurality of composite ducts arranged in series coaxially, each composite duct comprising:
- a first cylindrical duct, having an inlet end and an outlet end and a first diameter,
- a second cylindrical duct, having an inlet end and an outlet end and a second diameter smaller than the first diameter, and
- a conical transition duct connecting the outlet end of said first cylindrical duct with the inlet end of said second cylindrical duct;
- wherein, for each of the serially arranged composite ducts except for the composite duct at the end of the series, the outlet end of each said second cylindrical duct extends into the inlet end of said first cylindrical duct of the composite duct immediately downstream thereof;
- wherein the ejection nozzle is provided with at least one opening for evacuating air;
- and
- wherein the diameter of said second cylindrical ducts varies between said composite ducts so that the last said second cylindrical duct in the direction of flow has a reduced diameter.
Dependencies are inferred from the claim text.