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L’ancien dirigeant de la miroiterie Schultz président de la CPME 53

 

 

Raphaël Alexandre a été désigné président de la CPME 53, la confédération des petites et moyennes entreprises de la Mayenne, jeudi 9 janvier 2020. Ce n’est pas son premier mandat au sein de l’institution : il a déjà occupé les postes de vice-président à l’industrie et à l’artisanat.

Directeur de la miroiterie Schultz à Saint-Berthevin jusqu’en 2016, Raphaël Alexandre a créé en 2018 l’agence Cheval et Patrimoine spécialisée dans le tourisme équestre. « Nos adhérents se composent essentiellement d’artisans qui travaillent seuls, rappelle le nouveau président. Notre mission reste de les aider au quotidien. »

 

Acquisition of a mirror factory by Cevino glass in the Lyon region

 

The mirror of the North of France which has been operating since 2012 from the Dubrulle and Kap Glass mirrors has just bought the mirror of Ponchara, Tecni bombage from its manager Jean Mas. Tecni bombage is one of the major French players in the field of curved glass with around fifty employees and a turnover of around 8 million euros.

Cevino glass which bought in 2018 the mirror maker Nealtis operating in the Paris region now has 14 production sites in France

100 years for the Charles Costa mirror shop

 

 

 

For 100 years, each of the 4 generations has seen their father invest in the Charles Costa business, without counting his time, deploying a lot of effort and always with passion

 

We are happy to celebrate this year the extraordinary anniversary of our centenary.

 

Be sure that the satisfaction of our customers will always remain at the heart of our priorities as well as the respect of commitments with our partners.

 

I join with all my colleagues in presenting to you our best wishes for health, success and serenity for this new year 2020.

 

 

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Sarthe. L’entreprise Grav’Or ce week-end à l’Élysée

L’entreprise mancelle de gravure sur verre, fait partie des 100 entreprises sélectionnées pour l’exposition « Fabriqué en France » qui se déroule les 18 et 19 janvier 2020 à l’Elysée.

Les samedi 18 et dimanche 19 janvier 2020, 100 entreprises françaises – sélectionnées parmi 1 750 dossiers – présenteront le savoir-faire « Fabriqué en France » de 100 départements français, à l’Élysée. L’entreprise mancelle Grav’Or a été retenue pour représenter la Sarthe.

Nommée aux Talents de la Sarthe 2018 dans la catégorie « entreprise », la société de miroiterie et décoration sur verre présentera ce week-end un paravent avec gravure à la main, feuille d’or et laquage en églomisé précise le site de l’Élysée.

 

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Glass tempering furnaces

 

1/Introduction

There are to main reasons for glass tempering

To harden the glass surface

To prevent, in case of glass breaks, to have very dangerous big pieces of broken glasses

 

A/Different glass tempering

There are 2 different glass tempering but only one( the thermic one) reaches the 2 targets

Chemical tempering

Thermic tempering

 

1/The chemical tempering

The glass is dived inside heated salts bath. The bath chemical composition depends on the type of glass. The target is to introduce at the glass surface more important dimensions cations from the salt bath, to replace the smaller ones which are already inside the glass. This is possible thanks to the temperature increase (more than 400 degrees Celsius) which allows to the cations to move.

During the cooling the cations movement stops and the biggest are kept in a smaller space than the one they normally need. So they are going to take more space and to harden the glass surface.

Moreover the surface is going to be in compression and increase the glass resistance to break.

But if the glass breaks the big dangerous glass pieces remain.

The chemical tempering is used for glass less than 5 mm thickness.

 

2/The thermic tempering

The idea is the same, to put the glass surface in compression. But a thermic way is going to be used.

The glass is heated( more than 600 Celsius degrees) in an oven for a time depending the glass thickness (between 1 and 15 minutes). And quickly cooled down (with air under pressure).

The surface quickly cooled is going to be in compression and the internal part of the glass is going to be in extension

This way to temper has some advantages

The glass broke in small pieces (less than 1 cm²), so less dangerous for people

It is less expensive

It is possible to temper all kind of thicknesses

 

B/The machines for thermic tempering

-The tempering vertical ovens

The tempering oscillating horizontal ovens

The tempering continuous horizontal ovens

 

2/Oscillating horizontal tempering furnaces

There are 4 areas: loading, heating, tempering/cooling, unloading

In the loading area the operator prepares the batch and waits to introduce the glass inside the oven till the previous batch leaves the heating area.
In the heating area the glass moves continuously with oscillation on rolls to prevent deformations.

When the temperature required is reached the rolls exit quickly the glass from the heating area to the tempering area where under high pressure air is sent on the surface.

In the same time a new batch is introduced inside the heating area.

When the glass, in the tempering area, reaches the right temperature to be manually unloaded it is driven to the unloading area where operators unload the glass.