Patent ID: 9028738
Filing Date: 2015-05-12
Classification: B29D

Abstract:
1. A tire vulcanizer, comprising: two sets of vulcanizing and patterning portions, each of which includes a lower mold, an upper mold openable and closable relative to said lower mold, and a center mechanism provided with a bladder to be installed in a green tire, said vulcanizing and patterning portions for squeezing the green tires with said lower molds and said upper molds after shaping of installing said bladders to the green tires, so as to perform vulcanization and patterning; a medium circulating passage for circulating a vulcanization gas; medium supplying passages respectively provided for said center mechanisms and connected to said medium circulating passage, said medium supplying passages for supplying the vulcanization gas circulated in said medium circulating passage to interiors of said bladders; medium returning passages respectively provided for said center mechanisms and connected to said medium circulating passage on the downstream side in a circulating direction of the vulcanization gas with respect to said medium supplying passages, said medium returning passages for recovering the vulcanization gas discharged from the interiors of said bladders to said medium circulating passage; a pump provided in said medium circulating passage, for pressurizing the vulcanization gas; supply switching valves respectively provided in said medium supplying passages, for opening and closing said medium supplying passages; exhaust switching valves respectively provided in said medium returning passages, for opening and closing said medium returning passages; bypass valves provided in said medium circulating passage and respectively arranged for said center mechanisms between a point where said medium supplying passages are connected to said medium circulating passage and a point where said medium returning passages are connected to said medium circulating passage, said bypass valves for opening and closing said medium circulating passage; a first heating device provided in said medium circulating passage and arranged on an upstream side with respect to a point where said medium supplying passage provided in said center mechanism which is placed on the upstream side in the circulating direction of the vulcanization gas is connected to said medium circulating passage; a first temperature sensor provided in an outlet of the first heating device, said first heating device for heating the vulcanization gas based on a temperature measured by the first temperature sensor; a second heating device provided in said medium circulating passage and arranged between a point where said medium returning passage provided in said center mechanism which is placed on the upstream side in the circulating direction of the vulcanization gas is connected to said medium circulating passage, and a point where said medium supplying passage provided in said center mechanism which is placed on a downstream side in the circulating direction of the vulcanization gas is connected to said medium circulating passage; and a second temperature sensor provided in an outlet of the second heating device, said second heating device for heating the vulcanization gas based on a temperature measured by the second temperature sensor.