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REVERSE GLASS ROLLER COATER
We're In The News!
Union Tool's Reverse Roller Coaters
are featured in a spandrel glass coating article
in Ceramic Industry magazine
A roller coater especially designed to apply paint and other coatings
to glass plates and panels. While there are many applications for processing
glass sheets in this manner, this particular machine is used in the
creation of spandrel glass panels for buildings and architecture.
SYNONYMS
This may be called a glass coater, spandrel glass roller coater, glass
paint applicator, roll coater for glass, glass painter, and glass paint
coater.
ROLL CONFIGURATION
In the Model C-rev Single Reverse Action Top Coater
Roll Configuration, the liquid coating for the top surface is held
in the trough between the top coating roll and its companion doctor
roll. In this configuration, however, the top coating roll is rotating
against the direction of substrate movement; this is the "reverse
coating action" that results in a very smooth and even coating, which
is especially desired in coating glass and similar substrates. The
bottom roller simply drives the substrate through the
machine.
OPERATIONAL DESCRIPTION
The Union heavy duty Series #45, Model C, Reverse Glass
Roller Coater is specifically designed for the application of paint
to the top surface of glass substrates for the production of spandrel
glass.
Although roller coating glass is not new to The Union Tool Corporation,
the use of a roller coater to apply the paint for spandrel glass has
been refined by Union Tool and is making an impact on the architectural
glass industry. By utilizing our experience in designing and fabricating
roller coating equipment, we have designed a method of roller coating
glass that has many advantages over other methods of applying paint
to glass, such as spray, curtain coater, silk screen and even other
roller coaters.
The Reverse Glass Roller Coater incorporates an 8-3/4" diameter rubber-covered
coating roll, which works in conjunction with a 6-1/2" diameter chrome-plated
doctor roll and an 8-3/4" diameter rubbercovered backup roll. As with
all Union Roller Coaters, the doctor roll is adjustable in relationship
to the coating roll, thus regulating the amount of paint being applied
to the top surface of the glass. To ensure a smooth coating, reverse
coating is used. This reverse action is illustrated by the inset drawing.
Reverse roller coating as well as the durometer and grinding of the
coating roll are critical to this application.
Other features of this machine include the powered conveyors, which
transport the glass to and away from the coating assembly, explosion-proof
motor and electricals, variable speed drive, and precision control of
all roll adjustments.
Some of the advantages of the Union Reverse Glass Roller Coater are:
- Minimal amount of paint needed for start up of the Roller Coater
- Ability to leave the edges of the glass clean (both sides, leading
and back edge)
- Smoother coat with fewer striations
- A maximum of 15 minutes cleanup time
- Less waste of paint during operation and at cleanup time
- Ease of changeover from one color to another
- The speed of the Coater may be synchronized with the
corresponding curing ovens
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