Cold Tire Retread Production Line Buffing Machine Tyre Retreading
Equipment
First, tyre body testing
The Prevulcanized retreading method is different from the
traditional heat retreading techniques; it has more strict
requirements on the tyre body. At first, the ring can not have
broken wire, tyre appearance must be intact; the second , the tyre
side face can not have too much broken scar, even broken thread. If
rubber surface is aging and burned heavily, it can not be renew,
the third, small pinhole surface can be renovated, but local
wearing depth can not exceed three layers. Radial tyre steel wire
should not broken, drawn wire or rust marks are not allowed.
Second: The tyre body drying process
Due to the long circulating time over market, there is much dust,
dirt and other debris on the old tyre body surface, in order to
improve the tyre appearance and enhance inspection result; we have
to clean them carefully before the drying process. The aim of
drying is to wipe off the water inside innerliner, so as to
avoiding the tread surface and inside
layers delaminating.
Third: The tyre body polishing process
A qualified tyre body, after the certain period of drying process,
it should meet the first turn polishing process by "pneumatic tyre
profile grinding machines", so as to clear the waste tyre body
surface. According to strict requests, the polishing action must
follow the tyre body's radian and depth direction. After this step,
different kinds of tyre matrix need further manual repair on the
hole and scar parts, to get a rough and clear surface.
Fourth: The tyre molding process
Put the polished tyre on the shelf spreading the pre-mixed glue on
the surface of tyre. In the meantime, put the prepared tyre outer
layer on clear board also spreading glue on it, waiting for two
layers become dryer, then gluing them together by tread pressed
machine to expel air inside and intensify the tyre body and tread
bonding strength.
Fifth: The installation of tyre accessories
Put the glued tyre in the package envelope disassembly machine to
finish the tyre outer packing, and then use the wheel changer,
special wheel rim and chuck to intensify the outer packing coat,
finally put the finished tyre into vulcanizing tank to get
vulcanization process.
Sixth: Tyre vulcanization process
Because this process is the pre-vulcanization(cold turn) retreading
tyre, so it has special requests towards the vulcanizing
temperature and vulcanizing time. Through tyre inflating, tank
inflating, and outer packet inner groove inflatable technique, and
under certain scientic and reasonable time and temperature
"physical" vulcanizing, the tyre surface and body part can glue
together tightly.
Seventh: Product testing
Make serious testing towards the vulcanized tyre, so as to avoiding
undetected bad products into the market,
resulting in unnecessary trouble and losses.
