Coating apparatus – With means to deform work
Patent
1986-05-13
1987-06-02
Beck, Shrive P.
Coating apparatus
With means to deform work
118305, 118316, 118318, 118320, B05B 1306
Patent
active
046694170
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Tires for passenger cars, trucks and the like are often recapped when the tread has worn off. If the tire carcass is basically sound, the worn tread portion is removed to provide a smooth crown portion of the tire to which a new tread may be applied. If a new, previously formed tread is to be attached to the tire crown, a recapping cement is applied to the crown to hold the gum rubber to the tire. If a new tread is to be applied by an extruding process, cement may be applied to the tire crown to hold the strip wound extrusion in place. Before the new tread is applied, it is also common practice to apply a liner spray to the interior of the tire to seal small holes, cracks, etc. in the tire which might permit air to leak through to the crown and cause partial separation of the new tread from the tire. The liner material is a liquid which is commercially available in spray form and is usually a synthetic rubber composition dissolved in a solvent so that it can be sprayed into the tire interior where it coagulates to provide the necessary seal.
Although these materials are usually applied manually, as by spraying or the like, attempts have been made to automate horizontally extending support means including a pair of spaced rollers which engaged the tire beads for rotating the tire. Also extending from the frame through the tire opening was a hold-down arm which engaged the lower portion of the tire beads to hold the tire against the rollers. A pair of tire spreading rollers were mounted on the hold-down arm. One was fixed on the arm and the other was mounted on a moveable, adjustable slider which permitted the distance between the rollers to be adjusted to accommodate different tire sizes. Two liner spray heads were also provided, one being mounted adjacent the fixed roller and the other being mounted on the adjustable slider, both being positioned to spray down into the tire interior. Although this machine was an improvement over prior manual operations, it did not apply the liner spray equally well to different size tires and it did not provide a means of automatically applying recapping cement.
SUMMARY OF THE INVENTION
Spraying apparatus is provided for tires having spaced beads surrounding a central opening, having a crown portion and having spaced side walls connecting the beads to the crown portion. A support frame has a tire supporting frame portion extending horizontally therefrom which includes a pair of spaced, tire bead engaging drive rollers for rotating a tire suspended thereon. A tire hold-down member, which is mounted on the support frame for vertical movements between a raised position and a lower, tire bead engaging position, extends from the support frame below the tire supporting frame portion to engage the tire beads to hold the tire against the drive rollers. Liner spray nozzle means are mounted between the drive rollers for spraying a liquid liner material upwardly into the tire interior. Tire bead spreading means extend upwardly from the tire supporting frame portion for spreading the side walls of a tire mounted thereon to hold the side walls apart while the tire is being rotated and sprayed.
In the preferred embodiment of the invention, the tire spraying apparatus also includes further spray nozzle means, and means mounting the further spray nozzle means generally above the tire for spraying a recapping cement on the tire crown as the tire is being rotated.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view in perspective of a tire spraying machine according to our invention;
FIG. 2 is a sectional view as seen generally from the line 2--2 of FIG. 1;
FIG. 3 is a sectional view as seen generally from the line 3--3 of FIG. 2, portions thereof being broken away;
FIG. 4 is a sectional view taken along line 4--4 of FIG. 2 on an enlarged scale;
FIG. 5 is a sectional view as seen generally from the line 5--5 of FIG. 2, portions thereof being broken away;
FIG. 6 is a horizontal sectional view as seen from line 6--6 of FIG. 2, portions thereof being broken aw
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Curtis Richard A.
Pederson Loren K.
Beck Shrive P.
Branick Industries, Inc.
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