US 7,588,719 B2Granted

Installation for the heat-treatment of parts

AssigneeLOI Thermprocess GmbH

InventorsHorst Becker, Friedhelm Kühn

Life of this patent

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Abstract

An installation for the heat-treatment of parts includes a rotary hearth that can be rotated in a timed manner and which has an outer and an inner wall limiting a furnace chamber that is divided up into a heating zone and at least one treatment zone by vertically movable doors. The outer wall in the heating zone is provided with a closable opening for charging or discharging the furnace. The installation further comprises a transport device for transporting the parts into or out of the rotary hearth furnace and a quenching device. In addition, a second closable opening is disposed in the outer wall of the rotary hearth furnace in the last treatment zone. A sluice is disposed adjacent to the second closable opening and a quenching device is designed as a quenching bath and connected to the rotary hearth furnace via the sluice.

Claims13

Dependent claims

An installation for the heat-treatment of parts comprising:

a rotary hearth furnace adapted to be rotated in a timed manner and comprising outer and inner walls for limiting a furnace chamber,
said furnace chamber having vertically movable doors adapted to divide up said furnace chamber into a heating zone and at least one treatment zone;
a first opening provided in said outer wall for charging said heating zone,
first means for closing said first opening,
a charging sluice disposed exterior to said furnace chamber and located adjacent said first opening;
a second opening provided in said outer wall for discharging from a downstream treatment zone,
second means for closing said second opening,
said installation further comprising:
transport means for transporting said parts into and out of the hearth furnace, quenching bath means for quenching said parts after treatment in said rotary hearth furnace;
and,
sluice means arranged to connect said second opening and said quenching bath means, wherein said sluice means and said charging sluice have at least one sluice door, each sluice door being disposed at about a right angle to the associated opening in said outer wall.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/508,735Filed 11 Mar 2003
Priority: DE 102 13 99127 Mar 2002
Published: US 2005/0161869 A128 Jul 2005
Granted: 15 Sep 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F27B 9/16
Characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment: the charge…
C21D 9/0037
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor: rotary furnaces with…
F27B 9/38
Details, accessories or equipment specially adapted for furnaces of these types: arrangements of devices for charging
F27B 9/39
Details, accessories or equipment specially adapted for furnaces of these types: arrangements of devices for discharging