Sinoptix introduces various processes for your technical glass projects.
Glass is a relatively difficult material to work due to the risk of breakage and its hardness. There are two main categories of glass working:
– Hot work (allow complex shapes)
–Cold work. (Easier to perform, but needs more time so the cost may increase).
1/ HOT WORK
Glass blowing :
Artisanally the blowing of the glass is always carried out using a cane, on which the blower will come deposit a mass of molten glass
(Gob). This mass is then worked during cooling to give the desired shape to the part. However, this technique is used very little for the industry whose requirements of form and tolerances are more stringent, and often reserved for artists.
The industry uses other processes such as blow molding. This process is used in most non-flat glasses, such as food containers or any other so-called hollow glass. Several methods can then follow one another to produce a part.
The glass can be pressed : The molten glass falls into a mold and then a punch goes down to give shape to the piece. This process is limited to simple shapes. Then it is possible to add a blowing step to reach the desired final shape. This is pressing-blowing , which allows the production of more complex shapes when a product with a larger volume is sought.
It is also possible to rotate the mold during blowing. This is press-blow-rotate . This guarantees a glass with thin and uniform walls, a process used in laboratory glassware for example.