836 



THE INDIA RUBBER WORLD 



ArcusT 1, 1921 



Brushes in Tire Making and Rubber Manufacture 



RUBBER niamil'acluring includes many operations in which the 

 use of brushes, both ordinary and special, is quite indis- 

 pensable, as in cleaning, cementing, buffing, polishing and 

 painting, as well as for general purposes. 



The illustration shows some typical brushes of different forms 

 and material, each intended for some special use in the rubber 

 factory. Their purposes are briefly as follows : 



No. 1. Floor Sweep. China bristle floor brush for sweeping 

 smooth cement or wood floors. .Mapted for sweeping whiting 

 from mill-room floors and clean- 

 ing up around mills and calen- 

 ders. It is sometimes used in 

 the compound pan in the opera- 

 tion of mixing on account of its 

 convenience for reaching under 

 the mill rolls by reason of its 

 long handle. 



No. 2. Bristle Mill Duster 

 AND Bench Brush. This is 

 commonly used by the rubber 

 mixer for gathering compound 

 ingredients that fall in the pan 

 during mixing, and at the calen- 

 der when a rubber surface is to 

 be dusted with flour, starch, etc. 

 It is convenient for brushing out 

 mold cavities and removing mold 

 trim and other scrap from work 

 benches in the press room and 

 other departments. 



Nos. 3 AND 4. Naphtha and 

 Acid-Cure Brushes. These are 

 round and flat tools with bristles 

 set in vulcanized rubber to keep 

 them from coming out when 

 used in naphtha. They are 

 adapted for spreading rubber 

 cement and applying chloride of 

 sulphur in the acid cure of inner 

 tubes. 



Nos. S, 6 AND 7. Fine Wire 

 Hand Scratch Brushes. These 

 are used for cleaning soapstone 

 and sulphur incrustations from molds, cores, tube or hose poles. 

 When made of stout flat wire this style of brush is useful for 

 cleaning pole stains from inner tubes. If the work is done with 

 brush and rubber wet, the inner tube may be cleaned without 

 injury by scratching. 



No. 8. Cure-Room Broom. A detachable-head broom of 

 specially-dressed bass fiber, for sweeping wet floors. 



Nos. 9, 10 and 11. FowER Wire Wheels. These wheels are 

 made in any diameter and any width of face desired. Wire of 

 various gages and temper is used, according to the work for 

 which the brushes are intended. They are used in power-cleaning 

 tire molds, cores and tube poles, also for bufiing cured beads, 

 carcasses and tread Ijands of pneumatic tires. They arc generally 

 used in all tire-repair work, roughing inner tubes for splicing, 

 and cleaning steel bands for receiving the hard rubber base of 

 solid tires. 



No. 12. Wheel Hub. A type of hub for securing power 

 brushes to the spindle. 



No. 13. Bristle Brush of Swab Form. The shape of this 

 brush makes it convenient for cleaning hollow spaces such as the 

 inside of tire cases, tire and bead molds, and for applying liquid 

 dressing for whitening the inside of tire casings. 



Xo. 14. B.\LL00N Brush for cleaning dust from balloon and 

 glove forms. 



No. 15. Warehouse Broom made of mixed corn and Japanese 

 fiber for general sweeping where upright brooms are used. 



No. 16. Push Broom for heavy sweeping around yards and 

 shipping platforms. 



The 



STANDARDIZATION OF BR A K E- LI N I NGS 

 The Journal of the Society of Automotive Engineers in a recent 

 issue, makes the following state- 

 ments : "The lack of definite in- 

 formation and uniform practice 

 w-ith regard to the testing an4 

 operation of brake-linings clearly 

 indicates that the establishment 

 of standard tests which can be 

 followed by manufacturers and 

 users and form the basis for pur- 

 chase specifications will be an im- 

 portant accomplishment in this 

 branch of the industry. Such 

 standards when carefully planned 

 and executed should make pos- 

 sible greater uniformity of mate- 

 rials and establish a better under- 

 standing of the essentials in- 

 volved." 



With similar purposes in view 

 the Bureau of Standards, after a 

 joint meeting of the Truck Divi- 

 sion of the Standards Committee 

 and the Truck Committee of the 

 National Automobile Chamber of 

 Commerce, held April 21, 1919, 

 agreed to conduct certain tests 

 for the determination of brake- 

 lining specifications and coeffi- 

 cients of friction. The work was 

 to proceed under the general su- 

 pervision of a subdivision of the 

 Truck Division in cooperation 

 with the Bureau of Standards 

 and the Motor Transport Corps, 

 the latter body to furnish also the necessary apparatus. 



Two years later it was found advisable to add representatives 

 of four brake-lining manufacturers, who should construct test- 

 ing equipment similar to that installed by the Bureau of Stand- 

 ards, and conduct an independent series of tests. 



At a conference called at the Bureau of Standards on May 

 17 of the present year, and when practically all of the brake- 

 lining manufacturers of the country were represented, many 

 problems were discussed, while data of much importance ap- 

 peared to have been obtained. It was felt, however, that still 

 further tests would be necessary, and more investigations should 

 be made before a final decision could be reached. The com- 

 parative information gained by the methods mentioned will un- 

 doubtedly prove of much value to the industry. 



Oshorn Manufticturins Co. 



Typical Brushes Used in the Rubber Industry 



".\CID0TEX," a new coagulant RE.-iEMBLlXC "CoAGULATEX ," is 



prepared and sold in Penang. Its analysis, as reported by Le 



Caoutchouc et la Giitia Percha, is as follows: 



Density at 85° 1-445 



Sulphuric acid 59.3% 



Hydrochloric acid 4.2% 



Mineral residue 8.4% 



The latter item is equivalent to 122 grams per liter. 



