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|Title:||TUBE EXTRUSION PRESS RUNOUT APPARATUS|
|Abstract:||Tube extrusion press runout apparatus to eliminate or minimize oxidation, to straighten and quench the extruded tube to drain the tube and blow moisture therefrom, to insert a plug and lubricant into one end of the tube, to point the end, and to feed the pointed end of the tube to a die for reduction.|
|Inventor(s):||Carraher; Delbert V. (Decatur, AL), Cunningham; James L. (Decatur, AL), Rieger; Klaus K. (Bloomfield Hills, MI)|
|Assignee:||Universal Oil Products Company (Des Plaines, IL)|
|Filing Date:||May 12, 1969|
|Claims:||1. A tube extrusion press runout and tube handling system comprising a relatively short stationary quench tube having an inlet end positioned directly adjacent an extrusion die to receive hot base tubes as they are extruded from the die, spray nozzles directed radially inwardly of said quench tube, an elongated enclosed runout guide tube or chamber having an open inlet end directly adjacent the outlet end of said quench tube, spray nozzles distributed along said guide tube, an elongated quench tank adjacent and parallel to said guide tube, and means for transferring tubes from said guide tube to said tank, a table extending along said tank, means for transferring quenched tubes from said tank to said table and transversely of said table, a feed trough at the side of said table toward which tubes are advanced, a tube blowout and pointing station between the sides of said table, and means associated with said feed trough for advancing the pointed ends of tubes into a draw die for connection to a bull block. |
2. A system as defined in claim 1 in which said runout guide tube or chamber is horizontal and has downwardly and inwardly inclined converging bottom walls effective to guide the extruded tubing into straight condition.
3. A system as defined in claim 2 in which the bottom walls are equally inclined from the vertical and have an included angle therebetween in excess of 90.degree..
4. A system as defined in claim 2 in which one of said bottom walls is hinged throughout its length to open throughout its length and to drop the straight tube as a unit into the quench tank.
5. A system as defined in claim 1 in which the quench tank is provided with a multiplicity of supports spaced longitudinally thereof in horizontal alignment to support the tubing in quenching water in straight condition.
6. A system as defined in claim 5, and in which the means for transferring the tubing from the quench tank to the table comprises crank arms having tube supports at the ends thereof, said arms being of progressively varying length mounted on pivot axes disposed along a line inclined from the horizontal to incline the tubing as it is lifted from the tank.
7. A system as defined in claim 6 comprising means for transferring the tubing from the crank arms to the table, said means comprising inclined pivotally mounted rails which pivot out of the way as the tubing is lifted past them but which retain the tubing as the tube supports on said crank arms move downwardly past said rails.
8. A system as defined in claim 1 in which the means for transferring tubes transversely of said table comprise separately operable systems to advance tubes at one side of the table toward the center of the table and to advance tubes at the other side of the table away from the center thereof.
9. A system as defined in claim 2 in which said feed trough is straight and includes an elongated pivoted straight end section which provides for guiding the pointed tube end toward a draw die station.
10. The method of treating tubing in a continuous process intermediate an extrusion die and a draw die which comprises
advancing the tubing immediately upon extrusion while at extrusion temperature through a high volume quenching spray while substantially preventing contact with air,
straightening the tubing by advancing the tubing further into a horizontal runout chamber having downwardly and inwardly converging bottom walls defining a straight line support which supports the tubing in straight condition,
releasing the tubing simultaneously throughout its length and providing for gravity movement thereof onto a multiplicity of longitudinally spaced tube supports in a body of water,
retaining the tubing in the quench water until quenching is completed,
lifting the tubing at a multiplicity of points to maintain the tube in straight condition, while inclining the tubing uniformly throughout its length to maintain its straight condition,
advancing the tubing laterally step-by-step while maintaining its inclined straight condition,
intermediate successive lateral advances applying air pressure to the elevated end of the tubing to expel water therefrom, inserting a floating mandrel and an internal tube lubricant, and pointing the end of the tubing,
depositing the tubing in a feed trough having a nonmetallic lining to prevent marring the tubing, and
advancing the tubing pointed end foremost to bring the pointed end into proximity to a draw die.
11. The method as defined in claim 10 which comprises spraying the tubing with water as it is advanced into the runout chamber.
12. The method as defined in claim 10 which comprises providing a gradual inclination of an elongated portion of the trough to align the pointed end of the tubing with the space occupied by a draw die.
13. The method as defined in claim 10 in which said tubing is supported on an inclined table intermediate the steps of lateral advancement.
14. The method as defined in claim 13 which comprises laterally advancing a multiplicity of sections of tubing simultaneously.
15. The method as defined in claim 14 which comprises laterally advancing a multiplicity of sections of tubing at one side of the table simultaneously toward the center of the table, and advancing a multiplicity of sections of tubing simultaneously away from the center of the table independently of the advancement of tubing toward the center of the table.