654 



THE INDIA RUBBER WORLD 



June 1, 1921 



sizes, namely: 3;.- to 4-inch and 4!i-inch up. These forms may 

 be attached to section molds, retreadcrs or to a separate steam 

 line. 



THE HAYWOOD VULCANIZERS 

 Haywood giant truck-tire molds arc made in 6, 7, 8, 9 and 

 10-inch sizes, with an absolutely smooth curing surface and ample 

 steam space, and are supplied with clamps and bead plates. Either 

 steam or air-bags may be used in making the cure. The molds 

 are constructed with three separate steam chests so that it is 

 possible to confine the heat to that portion of the tire being cured. 



H.wwood's Mold and Generator 



These molds are made for flat or round tread and can be attached 

 to any steam line or mounted on individual stands. 



THE BROWN VULCANIZERS 



The Brown pneumatic truck-tire sectional vulcanizer is made 

 in two styles, one for the round tread and one for the flat tread, 

 the round tread being made in 6, 7, 8 and 9-inch sizes, and the 



flat tread in 6, 7 and 8- 

 inch sizes. These molds 

 are particularly useful 

 for curing retread bands 

 where it is not desirable 

 to use the old method of 

 curing in steam kettles. 

 One pair of bead molds 

 is furnished with each 

 mold. Each tread style 

 and size is made in four 

 types : complete with gas 

 burners to generate its 

 own steam ; complete 

 less burners, to be con- 

 nected direct to steam ; 

 complete with gasoline 

 burner to generate its 

 own steam ; or complete 

 with kerosene burner to 

 generate its own steam. 

 The round tread 6 and 

 7-incIi sizes are full one- 

 quarter circle, while the 

 8-inch is almost one-third circle, being 42 inches in longitudinal 

 length at the bottom of the mold; the same is true of the 9-inch 

 size. The 8-inch size is used for retreading or vulcanizing retread 

 bands, as flanges are cast on the sides of the molds and heavy 

 steel clamps can be furnished for this work. Retreading can be 

 done in four cures. One pair of bead molds is furnished with 

 each mold. The 9-inch mold has no flanges on the sides and is 



Brown's Vulcanizer 



used for sectional and band curing. The flat tread molds are full 

 one-quarter circle, and one pair of bead molds is furnished with 

 each mold. 



LOWELL VULCANIZER 



The Lowell truck-tire equipment for vulcanizing pneumatic 

 truck tires is in four. full quarter-circle sectional molds. Models 

 26, 27 and 28 handle, respectively, 6, 7 and 8-inch tires of the 



flat tread type, while 



Model 21, equipped 



with reducing shells. 



handles sizes 6, 7 and 



8-inch tires of the round 



tread type. This latter 



model also, with the 



use of negative pads, 



handles flat tread tires. 



Model 21 is equipped 



with two pairs of bead 



molds, inside curing 



core and core clamp in 



addition to the reducing 



shells. This model can 



be used as a self-con- Lo^'^I-l Mold-Model 21 



tained unit, generating its steam by means of electricity, gas, 

 gasoline or kerosene. It can also be attached to a separate steam 

 supply. The other models are designed for attachment to a sep- 

 arate steam supply only. They are furnished with bead molds, 

 two pressure blocks, air-valve and wrench. 



The 

 round 



THE BACON VULCANIZERS 



"K" combination retread and sectional mold is for flat or 

 tread. Matrices in "Royal Cord," ".\II-Weather" or rib 



type treads can be fur- 

 nished. Provision is 

 made that the steam-bag 

 employed in doing sec- 

 tional work may be filled 

 with steam from the 

 mold. Tlie 6 and 7-inch 

 molds are equipped with 

 an automatic gas regula- 

 tor, radius rod, sand-bag, 

 wrench, clamps, etc., as 

 are the 8 and 9-inch 

 molds. Where the cures 

 lap, the tire is only semi- 

 cured on the first heat, 

 due to the arrangement 

 nf the cooling flange and 

 matri.K extension, and 

 when the tire is turned 

 for the next cure this 

 portion is thoroughly 

 cured. Bead molds are 

 not included in the equip- 

 ment of these molds. The 

 sides of the central portion of the cavity are raised so that per- 

 fect results are obtained when using the mold for sectional work. 

 The weight of the mold is 500 pounds. 



Bacon's Combination Mold 



Wobbly wheels, besides wearing bearings and otherwise 

 racking the machine, have an equally destructive effect on tire 

 treads. A slight wobble of only one degree actually drags the tire 

 sideways 920 feet in each tliousand miles. This rasping increases 

 with the seriousness of the trouble. Such a condition is easily 

 corrected and saves not only tires but the car from excessive 

 strain. — ^fiI!er Neifs Service. 



