high quality crucibles

Certified ISO 9001 EN 13485

For centuries, refractory has been the sole material able to resist very high temperature

….. some thousand years later, nothing better has been found .

1- Accurate drawings Drawings are often determined with the assistance of the casting

machine manufacturer.

I. Imperative conditions to obtain high quality crucibles

2 – Precise mold requiredTo obtain a precise mold , different steps have to be achieved :

1 – Reference model – made from plaster -

2 – Master Mold – made from plaster -

3 – Mother Mold – made from very hard plaster -

4 – Working Molds – made from refractory -

from which 50/100 crucibles will be made

3 – Strict selection of raw materials

Fused silica and other elements have to be conformed to the physical and chemical characteristics which have been defined to meet with 3 criteria :

- thermal shock resistance

- refractarity

- resistance to metallic corrosion

With each delivery of raw material, the checking of the “granulometrie”

allows a good fluidity of the liquid paste

II. The work of craftsmen …Refracto crucibles are made by using the flowing method, called “barbotine” which

gives :

• Excellent respect of dimension

• Excellent texture homogeneity

1 – Manufacture of each lot of “barbotine”

The preparation of a lot follows a very precise operating procedure :

- Precise weighing of the elements

- Strict respect of the introduction order

II. The work of craftsmen …Refracto crucibles are made by using the flowing method, called “barbotine” which

gives :

• Excellent respect of dimension

• Excellent texture homogeneity

1 – Manufacture of each lot of “barbotine”

The preparation of a lot follows a very precise operating procedure :

- Precise weighing of the elements

- Strict respect of the introduction order

- Shaking and mixing

II. The work of craftsmen …Refracto crucibles are made by using the flowing method, called “barbotine” which

gives :

• Excellent respect of dimension

• Excellent texture homogeneity

1 – Manufacture of each lot of “barbotine”

The preparation of a lot follows a very precise operating procedure :

- Precise weighing of the elements

- Strict respect of the introduction order

- Shaking and mixing

- Time for settling

II. The work of craftsmen …Refracto crucibles are made by using the flowing method, called “barbotine” which

gives :

• Excellent respect of dimension

• Excellent texture homogeneity

1 – Manufacture of each lot of “barbotine”

The preparation of a lot follows a very precise operating procedure :

- Precise weighing of the elements

- Strict respect of the introduction order

- Shaking and mixing

- Time for settling

- Re-shaking

II. La fabrication : Un travail artisanalLes creusets Refracto sont fabriqués par la méthode du coulage en barbotine qui assure :

Une excellente fidélité dimensionnelle.

Une excellente homogénéité de texture.

1 - Préparation d’un lot de barbotine

- Pesée des constituants

- Agitation et mélange

- Respect des temps

de repos

- Réagitation

II. The work of craftsmen …Refracto crucibles are made by using the flowing method, called “barbotine” which

gives :

• Excellent respect of dimension

• Excellent texture homogeneity

1 – Manufacture of each lot of “barbotine”

The preparation of a lot follows a very precise operating procedure :

- Precise weighing of the elements

- Strict respect of the introduction order

- Shaking and mixing

- Time for settling

- Re-shaking

- Manufacture of test samples for

validation and tracking reference

2 – Flowing the “barbotine” into the working molds - Molds are filled ….

2 – Flowing the “barbotine” into the working molds - Molds are filled ….

-Then, emptied after a specific determined amount of time

2 – Flowing the “barbotine” into the working molds - Molds are filled ….

-Then, emptied after a specific determined amount of time

-Thickness is checked by caliper .

3 – Demold , bur removal, finishing …

(with specific tools manufactures with the mold )

The “R” is engraved … as pre-validation

4 – Drying

Crucibles have to be completely dry before placement in oven .

48 hours is requested

5 – Oven time

Temperatures are carefully ramped-up in stages

Systematically checked every firing

6 – Final tests

Before release of crucibles for sale, lot samples are carefully checked against strenuous conditions .

7 – Pack out

Crucibles are carefully packed in foam lined boxes

Ready to be sent to you ….100% satisfaction guarantee