Title of Invention	AN APPARATUS FOR SPRAYING A PROCESSING LUBRICANT/SOLVENT ON THE INTERNAL SURFACE OF A GREEN TYRE
Abstract	An apparatus for spraying a processing lubricant / solvent on the internal surface of a green tyre, comprises a motor-spindle assembly, one end of the spindle being connected to a disc, the other end of the spindle being connected to the motor. A lid is disposed above the disc. Means are provided for lowering the disc into, and raising the same out of, the opening in a green tyre placed below the disc on a platform, the disc, during its downward pass into the tyre being rotatably driven by the motor. A tank containing the processing lubricant / solvent is provided along with means for providing a regulated delivery of the processing lubricant / solvent from the tank on to the upper surface of the rotating disc, only during its downward pass, to cause the processing lubricant / solvent to be sprayed around the internal surface of the tyre, the disc, thereafter, on its upward pass, exiting the tyre.

Title of Invention

AN APPARATUS FOR SPRAYING A PROCESSING LUBRICANT/SOLVENT ON THE INTERNAL SURFACE OF A GREEN TYRE

Abstract

An apparatus for spraying a processing lubricant / solvent on the internal surface of a green tyre, comprises a motor-spindle assembly, one end of the spindle being connected to a disc, the other end of the spindle being connected to the motor. A lid is disposed above the disc. Means are provided for lowering the disc into, and raising the same out of, the opening in a green tyre placed below the disc on a platform, the disc, during its downward pass into the tyre being rotatably driven by the motor. A tank containing the processing lubricant / solvent is provided along with means for providing a regulated delivery of the processing lubricant / solvent from the tank on to the upper surface of the rotating disc, only during its downward pass, to cause the processing lubricant / solvent to be sprayed around the internal surface of the tyre, the disc, thereafter, on its upward pass, exiting the tyre.

Full Text	This invention relates to an apparatus for spraying a processing lubricant / solvent on the internal surface of a green tyre. The spraying is done prior to vulcanisation and this is necessary to protect the integrity of the inside tyre surface during the shaping operation which takes place during the process of vulcanisation. According to the prior art, a spray gun is employed for the purpose of spraying the processing lubricant / solvent on the internal surface of a green tyre. The problems associated with a spray gun are : (I) clogging at the spray tip (II) enlargement of the tip of the spray gun over prolonged use (ill) maintaining air quality, which is a difficult task On the other hand the apparatus proposed herein is free from the above problems. Once the apparatus proposed herein is activated, the spraying operation is automatic. Various other features of this invention will be apparent from the further description thereof given hereunder. The apparatus for spraying a processing lubricant / solvent on the internal surface of a green tyre, according to this invention, comprises a motor-spindle assembly, one end of the spindle being connected to a disc, the other end of the spindle being connected to the motor; a lid disposed above the disc; means for •K lowering the disc into, and raising the same out of, L green tyre placed below the disc on a platform^ jihe j( disc, during its downward pass into the tyre /, being rotatably driven by the motor; a tank containing the processing lubricant / solvent; and means for providing a regulated delivery of the processing lubricant / solvent from the tank on to the upper surface of the rotating disc, only during Its downward pass, to cause the processing lubricant / solvent to be sprayed around the internal surface of the tyre, the disc, thereafter, on its upward pass, exitir^ the tyre. The apparatus proposed herein will now be described with reference to the accompanying drawings, the single Figure therein illustrating, by way of example, and not by way of limitation, one of various possible embodiments of this invention. The motor-spindle assembly is indicated by 2. A flange type motor 14 which is capable of rotating at a predetermined speed is used. One end of the spindle 13 is connected to a disc 6, the other end of the spindle being connected to the motor 14 through a flexible coup]ing. A 1 id 5 disposed above the disc is used to cover the green tyre 15 during the spraying operation, to contain the spray within the tyre. The tyre is placed below the disc on a platform 16. Guide shafts 4 guide the lid 5 during movement. Means are provided for lowering the disc into, and raising the same out of, the tyre opening, the disc, during its downward pass into the tyre being rotatably driven by the motor 14. In the embodiment illustrated such means comprise a pneumatic device 1 which, when activated, lowers the motor-spindle assembly to enable the disc to enter the tyre from the level of the upper bead 17 thereof right down to the level of the lower bead; and subsequently raises the said assembly to enable the disc to exit the tyre. A stirrer tank 9 contains the processing lubricant / solvent which Is ultimately to be sprayed on the Internal surface of the tyre. The tank Is fitted with a stirrer driven by a diaphragm motor for effectively maintaining the processing lubricant / solvent in stirred condition. Means are provided for regulated delivery of the processing lubricant / solvent from the tank on to the upper surface 18 of the disc, only during the downward pass of the disc 6 into the tyre opening (during which pass the disc is rotatably driven by the motor) to cause the processing lubricant / solvent to be sprayed around the internal surface of the tyre. On completion of this operation, the disc is caused to be raised, by the pneumatic device 1, to exit the tyre. One form of such means for regulated delivery of the processing lubricant / solvent from the tank 9 on to the upper surface 16 of the disc, comprises a do.$lng pump 6 provided with dosing valve 11 for pumping the processing lubricant / solvent from the tank to a midget cylinder assembly 12 which Is employed for the circulation and delivery of the processing lubricant / solvent. The processing lubricant / solvent Is pumped by the pump 8 through the sl.eilve«yl Ine 7a Into the midget cylinder assembly 12. The said processing lubricant / solvent Is then delivered on to the rotating disc 6 through line 7b by means of an automatic action of the midget cylinder assembly 12. The processing lubricant / solvent returns to the tank 9 through the return line 7c. As stated above, as the disc 6 is lowered and enters the tyre opening, the 1 id 5 is caused to seat itself on the upper bead of the tyre, to prevent the processing lubricant / solvent from splashing out, during the spraying operation. A foot valve 10 is provided for the processing lubricant / solvent circulation line. Guide shafts 3 are employed for the motor'splnd1e assembly for its smooth up and down movement. The terms and expressions in this specification are of description and not of limitation, there being no intention of excluding any equivalents of the features Illustrated and described, since various other embodiments of the apparatus proposed herein are possible without departing from the scope and ambit of this Invention. We Claim: 1. An apparatus for spraying a processing lubricant / solvent on the internal surface of a green tyre, comprising a motor-spindle assembly, one end of the spindle being connected to a disc, the other end of the spindle being connected to the motor; a lid disposed above the disc; means for lowering the disc into, and raising the same out of^ the opening in a green tyre placed below the disc on a platform, the j/ disc, during its downward pass Into the tyTml being rotatably driven by the motor; a tank containing the processing lubricant / solvent; and means for providing a regulated delivery of the processing lubricant / solvent from the tank on to the upper surface of the rotating disc, only during its downward pass, to cause the processing lubricant / solvent to be sprayed around the internal surface of the tyre, the disc, thereafter, on its upward pass, exiting the tyre. 2. An apparatus as claimed in Claim 1 wherein the motor is a flange type motor capable of being driven at a predetermined speed. 3. An apparatus as claimed in Claim i or 8 -€'lai-w 2 wherein guide shafts are provided for guiding the lid during movement. 4. An apparatus as claimed in any one of the preceding Claims wherein the means for lowering the disc into, and raising the same out of, the tyre opening, comprise a pneumatic device which, when activated, lowers the motor-spindle assembly to enable the disc to enter the tyre opening from the level of the upper bead thereof right down to the level of the lower bead; and subsequently raises the said assembly to enable the disc to exit the tyre. 5. An apparatus as claimed in any one of the preceding Claims wherein the tank is provided with a stirrer driven by a diaphragm motor, f-os—effect J we Hitiprer aotlon. 6. An apparatus as claimed In any one of the preceding Claims wherein the means for regulated delivery of the processing lubricant / solvent from the tank on to the upper surface of the disc, comprises a dosing pump provided with a doling valve for pumping the processing lubricant / solvent from the tank to a midget cylinder assembly which Is employed for the circulation and delivery of the processing lubricant / solvent. 7. An apparatus as claimed in any one of the preceding Claims wherein a foot valve Is provided for the processing lubricant / solvent circulation 1ine. 6. An apparatus as claimed In any one of the preceding Claims wherein guide shafts are employed for the motor-spindle assembly for its smooth up and down movement. 9. An apparatus as claimed in Claim i wherein the lid seats itself on the upper bead of the tyre during the downward pass of the disc into the tyre opening, the lid raising itself over the tyre during the upward pass of the disc. 10. An apparatus for spraying a processing lubricant / solvent on the Internal surface of a green tyre, substantially as herein described and illustrated with reference to the accompanying drawing .

Full Text

This invention relates to an apparatus for spraying a processing lubricant / solvent on the internal surface of a green tyre.
The spraying is done prior to vulcanisation and this is necessary to protect the integrity of the inside tyre surface during the shaping operation which takes place during the process of vulcanisation.
According to the prior art, a spray gun is employed for the purpose of spraying the processing lubricant / solvent on the internal surface of a green tyre.
The problems associated with a spray gun are :
(I) clogging at the spray tip
(II) enlargement of the tip of the spray gun over prolonged use
(ill) maintaining air quality, which is a difficult task
On the other hand the apparatus proposed herein is free from the above problems. Once the apparatus proposed herein is activated, the spraying operation is automatic.
Various other features of this invention will be apparent from the further description thereof given hereunder.
The apparatus for spraying a processing lubricant /
solvent on the internal surface of a green tyre,
according to this invention, comprises a motor-spindle
assembly, one end of the spindle being connected to a
disc, the other end of the spindle being connected to
the motor; a lid disposed above the disc; means for
•K lowering the disc into, and raising the same out of, L
green tyre placed below the disc on a platform^ jihe
j( disc, during its downward pass into the tyre /, being
rotatably driven by the motor; a tank containing the processing lubricant / solvent; and means for providing a regulated delivery of the processing lubricant / solvent from the tank on to the upper surface of the rotating disc, only during Its downward pass, to cause the processing lubricant / solvent to be

sprayed around the internal surface of the tyre, the disc, thereafter, on its upward pass, exitir^ the tyre.
The apparatus proposed herein will now be described with reference to the accompanying drawings, the single Figure therein illustrating, by way of example, and not by way of limitation, one of various possible embodiments of this invention.
The motor-spindle assembly is indicated by 2. A flange type motor 14 which is capable of rotating at a predetermined speed is used. One end of the spindle 13 is connected to a disc 6, the other end of the spindle being connected to the motor 14 through a flexible coup]ing.
A 1 id 5 disposed above the disc is used to cover the green tyre 15 during the spraying operation, to contain the spray within the tyre. The tyre is placed below the disc on a platform 16. Guide shafts 4 guide the lid 5 during movement.
Means are provided for lowering the disc into, and raising the same out of, the tyre opening, the disc, during its downward pass into the tyre being rotatably driven by the motor 14. In the embodiment illustrated

such means comprise a pneumatic device 1 which, when activated, lowers the motor-spindle assembly to enable the disc to enter the tyre from the level of the upper bead 17 thereof right down to the level of the lower bead; and subsequently raises the said assembly to enable the disc to exit the tyre.
A stirrer tank 9 contains the processing lubricant / solvent which Is ultimately to be sprayed on the Internal surface of the tyre. The tank Is fitted with a stirrer driven by a diaphragm motor for effectively maintaining the processing lubricant / solvent in stirred condition.
Means are provided for regulated delivery of the processing lubricant / solvent from the tank on to the upper surface 18 of the disc, only during the downward pass of the disc 6 into the tyre opening (during which pass the disc is rotatably driven by the motor) to cause the processing lubricant / solvent to be sprayed around the internal surface of the tyre. On completion of this operation, the disc is caused to be raised, by the pneumatic device 1, to exit the tyre.
One form of such means for regulated delivery of the

processing lubricant / solvent from the tank 9 on to the upper surface 16 of the disc, comprises a do.$lng pump 6 provided with dosing valve 11 for pumping the processing lubricant / solvent from the tank to a midget cylinder assembly 12 which Is employed for the circulation and delivery of the processing lubricant / solvent. The processing lubricant / solvent Is pumped by the pump 8 through the sl.eilve«yl Ine 7a Into the midget cylinder assembly 12. The said processing lubricant / solvent Is then delivered on to the rotating disc 6 through line 7b by means of an automatic action of the midget cylinder assembly 12. The processing lubricant / solvent returns to the tank 9 through the return line 7c.
As stated above, as the disc 6 is lowered and enters the tyre opening, the 1 id 5 is caused to seat itself on the upper bead of the tyre, to prevent the processing lubricant / solvent from splashing out, during the spraying operation.
A foot valve 10 is provided for the processing lubricant / solvent circulation line.
Guide shafts 3 are employed for the motor'splnd1e assembly for its smooth up and down movement.

The terms and expressions in this specification are of description and not of limitation, there being no intention of excluding any equivalents of the features Illustrated and described, since various other embodiments of the apparatus proposed herein are possible without departing from the scope and ambit of this Invention.

We Claim:
1. An apparatus for spraying a processing
lubricant / solvent on the internal surface of a green
tyre, comprising a motor-spindle assembly, one end of
the spindle being connected to a disc, the other end of
the spindle being connected to the motor; a lid
disposed above the disc; means for lowering the disc
into, and raising the same out of^ the opening in a
green tyre placed below the disc on a platform, the
j/ disc, during its downward pass Into the tyTml being rotatably driven by the motor; a tank containing the processing lubricant / solvent; and means for providing a regulated delivery of the processing lubricant / solvent from the tank on to the upper surface of the rotating disc, only during its downward pass, to cause the processing lubricant / solvent to be sprayed around the internal surface of the tyre, the disc, thereafter, on its upward pass, exiting the tyre.
2. An apparatus as claimed in Claim 1
wherein the motor is a flange type motor capable of
being driven at a predetermined speed.
3. An apparatus as claimed in Claim i or
8

-€'lai-w 2 wherein guide shafts are provided for guiding the lid during movement.
4. An apparatus as claimed in any one of
the preceding Claims wherein the means for lowering the
disc into, and raising the same out of, the tyre
opening, comprise a pneumatic device which, when
activated, lowers the motor-spindle assembly to enable
the disc to enter the tyre opening from the level of
the upper bead thereof right down to the level of the
lower bead; and subsequently raises the said assembly
to enable the disc to exit the tyre.
5. An apparatus as claimed in any one of the preceding Claims wherein the tank is provided with a stirrer driven by a diaphragm motor, f-os—effect J we Hitiprer aotlon.
6. An apparatus as claimed In any one of
the preceding Claims wherein the means for regulated
delivery of the processing lubricant / solvent from the
tank on to the upper surface of the disc, comprises a
dosing pump provided with a doling valve for pumping
the processing lubricant / solvent from the tank to a
midget cylinder assembly which Is employed for the circulation and delivery of the processing lubricant /

solvent.
7. An apparatus as claimed in any one of
the preceding Claims wherein a foot valve Is provided for the processing lubricant / solvent circulation 1ine.
6. An apparatus as claimed In any one of
the preceding Claims wherein guide shafts are employed
for the motor-spindle assembly for its smooth up and
down movement.
9. An apparatus as claimed in Claim i
wherein the lid seats itself on the upper bead of the
tyre during the downward pass of the disc into the
tyre opening, the lid raising itself over the tyre
during the upward pass of the disc.
10. An apparatus for spraying a processing
lubricant / solvent on the Internal surface of a green
tyre, substantially as herein described and illustrated
with reference to the accompanying drawing .

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Patent Number

252751

Indian Patent Application Number

518/MAS/2001

PG Journal Number

22/2012

Publication Date

01-Jun-2012

Grant Date

30-May-2012

Date of Filing

25-Jun-2001

Name of Patentee

MRF LIMITED

Applicant Address

124 GREAMS ROAD, CHENNAI 600 006.

Inventors:

#	Inventor's Name	Inventor's Address
1	KURIEN GEORGE	EXECUTIVE DIRECTOR: TECHNICAL AND MANUFACTURING, MRF LIMITED, 124 GREAMS ROAD, CHENNAI 600 006.

PCT International Classification Number

B05B7/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA