1.Glass cutting
First, the manufacturer will
purchase thin glass from the supplier of glass for cutting. (The size
of large glass is: 1100*900, 480*380, etc.); the thickness of glass
currently has the following thicknesses (unit: MM). 0.4MM, 0.33MM,
0.20MM, 0.15MM and so on. According to recent market observations,
0.33mm thickness tempered glass is more popular in the market.
2.CNC machining
The
rectangular small-sized glass processed by the first cutting process is
processed by the CNC engraving and milling machine according to the
shape and size of different mobile phone models, and processed into a
cell phone glass screen protector with accurated hole.
3.Polishing or flat grinding
After
CNC machining, due to the operation during processing or other reasons,
as well as the market demand for the curvature of the edge of the
tempered glass screen protector, it is necessary to carry out the
processing of polishing process, which can effectively remove the
scratches on the surface of the glass protector and increasing the
curvature and brightness of the edges of the glass protector to achieve a
beautiful and durable function.
4.Ultrasonic cleaning
After the sweeping of the
tempered glass screen film,
it is necessary to clean the pulverized powder, and divide it into 5
different levels of cleaning tanks. After cleaning, put it into the oven
for drying.
After drying, enter the quality inspection process, check the defective products (the products are directly invalidated)
5.Tempering Glass to make its stronger
The
principle of tempering: the glass product is treated in a KNO3 melt at
about 400 °C for several hours to exchange K+ and Na+ to form a
compressive stress layer on the surface of the glass. When the glass
product is subjected to an external force, the external force is
suppressed and the expansion of the micro crack is suppressed. To
improve the mechanical strength, the normal glass screen protector needs
to be tempered in a 400-degree potassium nitrate tempering furnace for
about 4 hours, so as to ensure the surface hardness and explosion-proof
of the glass.
6.Ultrasonic pure water cleaning
This
process is related to the cleanliness of the finished product,if the
water is not pure as request or didn't clean well at this step then the
glass screen protectors will have dots or dust inside of the glass.
7.AB Glue
To
make the AB glue and glass paste together ,all of this steps have to be
made in the dust-free workshop and every worker have to wear the
dust-free cloth ;before going inside there is one door with the machine
that will remove the all dust for the people.
8.Oil-Coating
In
order to prevent the tempered glass screen guard from being
contaminated, the tempered glass protective film produced in the
industry is now oiled. Generally, the anti-fingerprint oil is applied to
achieve the effect of preventing oil stains. The oiling process is now
available in three ways: A: hand coating, B: spraying, C: plating. The
processing effect is increasing in turn. Of course, the related
processing costs will increase.
9.Packaging
After the quality of the products processed through the above processes, the final process - packaging.
