Patent GB-1468314-A (GB)
Title: Tyre vulcanizing apparatus
IPC: B29D30/06
Filed: 1975-03-05
Abstract: 1468314 Moulding tyres VSES NI INST REZINOTEKHNICHE MASHINOSTR and NI INST SHIN PROMYSHLEN 5 March 1975 9056/75 Heading B5A A row of tyre vulcanizing presses 5, Fig. 2, is associated with a structure 2 reciprocable on rails therealong which contains means for retaining it over each press, for loading green tyres into the bottom mould section 7 of each press, for locking the top and bottom mould sections 6, 7 together by bayonet lock 8, Figs. 17, 18, for forming the bladder 9 of each press into a well 10 when the tyre has cured, and for clamping the top bead of a cured tyre by radially movable segments 19 to the upper mould section prior to withdrawing the cured tyre from the bottom mould section; each bladder includes a valve 66, Fig. 16, which is contacted by the lower end of a plunger 55 whereby the bladder is forced into the well, such valve sealing against an aperture 65 when in its uppermost position. Two adjacent presses are treated simultaneously at each position of the structure which includes a frame 29, Fig. 3, carrying a beam 32 which can be raised, lowered and moved laterally by crank mechanism along guideways whereby the top mould sections are conveyed. The beam carries two wrenches 33 for effecting mould locking and two plunger mechanisms for contacting the bladders; the structure also includes two mechanisms 51 for loading green tyres into the moulds. On completion of tyre curing the structure is driven to a pair of moulds, the wrenches are lowered and rotated to unlock the moulds whereupon each plunger 55 is driven downwards by a rack and pinion transmission 57 operated from an hydraulic cylinder. The segments 19 are pushed downwardly and on continued lowering of the plunger the bladder is forced into the well and the segments moved outwardly by arms 23 actuated by a frusto-conical part of the plunger whereby a cured tyre is retained in the upper mould section. The beam 32 is then raised and moved sideways to convey the tyres to an unloading position; the green tyre loading mechanisms 51 are operated to load fresh tyres into the lower mould sections and steam is fed into the wells to force the bladders into the tyres. Simultaneously the cured tyres are unloaded from the top mould sections by mechanisms 77, Fig. 18, in which rods 76 and hubs 89 are driven upwardly by rack and pinion transmissions causing rollerways 109 pivoted at 105 and supported by arms (106), Fig. 14 (not shown), to fall to horizontal positions; the plungers 55 are driven to their uppermost positions and the segments withdrawn from the cured tyre beads. Continued upward movement of the rods 76 produces the abutment of carriages 91 thereon with bases 20, Fig. 18, of the segments and, since the carriages are spring-mounted on the rods, the latter continue to move upwardly to spread clamps 90 outwardly via linkages 92, and allow springs 100, Fig. 13, to swing catches 94 clockwise to bring grooves 95 into alignment with finger 93 on the carriages. Subsequent downward movement of the rods causes the clamps 90 to engage the bottom beads of the tyres and remove them from the top mould sections and bring them to rest on the rims 101. At the lowermost position of the rods the catches 94 are rotated by abutments 97 to release the fingers 93 allowing the carriages 91 to rise and retract the clamps 90. The rings 101 engage followers of arms (106) supporting the ends of the rollerways, causing them to swing upwardly about pivots 105 and lift the cured tyres clear of the carriages 91 whereby they roll to a delivery conveyer. The beam 32 is then returned to the position above the re-filled moulds, the upper mould sections lowered and secured and a further moulding effected. The structure moves to the next pair of moulds and the process is repeated.