Title:
ROTARY FURNACE FLOOR HAVING RING SHAPED STRUCTURE FOR HEAT TREATMENT OF WORKS
Document Type and Number:
Japanese Patent JPS6141759
Kind Code:
A
Abstract:
In a furnace for heat-treating workpieces with a rotary annular hearth 4, the hearth 4 is driven stepwise with each step (h) being an integral fraction of the hearth circumference, and the annular space of the furnace is subdivided by a plurality of simultaneously movable partitions 9-12 spaced from one another by integral multiples of a step (h), whereby the furnace is provided with separate treatment zones 16-19 with different temperatures and atmospheres. The annular space is conveniently subdivided into a loading and unloading zone 16, a heating-up zone 17, a carburisation zone 18 and a diffusion annealing zone 19. The hearth 4 may be driven by a hydraulic cylinder 13 connected by a ratchet device to a ring gear on the hearth, and may be subdivided into segments provided at their joints with sealing means 23 for the partitions 9-12. Workpiece receiving shelves may be provided above the hearth, with slots for the passage of the partitions.
Inventors:
MANFUREETO PAURU
Application Number:
JP15035185A
Publication Date:
February 28, 1986
Filing Date:
July 10, 1985
Export Citation:
Assignee:
DAIMLER BENZ AG
International Classes:
C21D1/00; C21D9/00; C23C8/22; F27B9/04; F27B9/06; F27B9/16; F27B9/20; F27B9/38; (IPC1-7): C21D1/00; C23C8/20
Domestic Patent References:
| JPS5145607A | 1976-04-19 |
Attorney, Agent or Firm:
Osamu Nakahira
Previous Patent: The cartridge for infusion instruments, and infusion instruments
Next Patent: PRODUCTION OF BASE PAPER FOR FIBROUS CASING
Next Patent: PRODUCTION OF BASE PAPER FOR FIBROUS CASING