# US 10,369,619 B2 · Method of dressing a forge die in the implementation of parts obtained by two successive operations of foundry casting followed by forging

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- Number: US 10,369,619 B2
- Document ID: US10369619B2
- Status: Granted
- Kind: B2
- Application number: 14/369,371
- Filed: 2012-12-05
- Published: 2014-12-25
- Granted: 2019-08-06
- Earliest claimed: 2011-12-29
- Assignees: Saint Jean Industries
- Applicants: Saint Jean Industries
- Inventors: Emile Di Serio; Fabien Soubras
- Web page: https://patentgrep.com/patent/US10369619B2

## CPC

- B21J 3/00: Lubricating during forging or pressing (lubricating in general F16N)
- B05B 5/00: Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B21J 1/06: Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations {(B21J5/063 takes precedence)}
- B21J 5/002: {Hybrid process, e.g. forging following casting}
- B22C 9/12: Treating moulds or cores, e.g. drying, hardening
- B21J: FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B)

## Abstract

A method includes creating, in a foundry, a preform to the desired shape and size, in transferring this preform from the foundry to a tunnel oven, then preheating it to a temperature of around 500° C., transferring the preheated foundry preform into a die forge with a substantially smaller size and shape, and performing the die punching operation at a pressure of between 600 and 700 MPA, before the transfer of the preheated foundry preform to the forge die, the forge die and pins for positioning the preform are put through a powder-spraying operation on the entire inner surface of the forge die which is liable to receive the preheated foundry preform and the pins.

## Claims

### Claim 1

A method of casting and forging, the method comprising:
creating, in a foundry, a preform of a first shape and size;
transferring the preform from the foundry to a tunnel oven;
preheating the preform to a temperature of 500° C.;
transferring the preheated foundry preform into a die forge with a second shape and size that is substantially smaller than the first size and shape;
performing a die punching operation at a pressure of between 600 and 700 MPA; and
prior to transferring the preheated foundry preform to the forge die, powder-spraying a surface of the forge die and one or more pins for positioning the preform.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising:
spraying the powder by electrostatic depositing.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the powder contains particles.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the particles are graphite particles.

### Claim 5 (depends on 3)

The method according to claim 3 wherein the particles constitute less than 10% of the powder by weight.

### Claim 6 (depends on 4)

The method according to claim 4 wherein the particles constitute less than 10% of the powder by weight.

### Claim 7 (depends on 2)

The method according to claim 2 wherein the powder contains a wax.

### Claim 8 (depends on 7)

The method according to claim 7 wherein the wax melts at 100° C.