公开(公告)号：JPH05104541A

公开(公告)日：1993-04-27

申请号：JP29521591

申请日：1991-10-15

Applicant: BRIDGESTONE CORP

Inventor： HASHIRA MASASHI ,  HIRAI NOBUYUKI ,  MURAKAMI KAZUYASU

IPC: B29C35/04 ,  B29D30/06 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00

Abstract: PURPOSE:To simplify an apparatus and to enhance the efficiency of vulcanizing work by vulcanizing a green tire using the radiant heat from the heater arranged in a bladder. CONSTITUTION:The heater 25 arranged in a bladder 19 is operated to generate radiant heat which is, in turn, transmitted to a green tire 12 through the bladder 19 to rapidly vulcanize the green tire 12. Since radiant heat is transmitted without interposing a substance, it is unnecessary to fill the bladder 19 with inert gas and steam and working efficiency is enhanced. Further, since it is unnecessary to circulate inert gas, a fan is dispensed with and a structure becomes simple.

公开(公告)号：JPH05104542A

公开(公告)日：1993-04-27

申请号：JP29483491

申请日：1991-10-16

Applicant: BRIDGESTONE CORP

Inventor： HASHIRA MASASHI ,  HIRAI NOBUYUKI ,  MURAKAMI KAZUYASU

IPC: B29C33/04 ,  B29C33/10 ,  B29C35/04 ,  B29D30/06 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00

Abstract: PURPOSE:To shorten the vulcanizing time of a tire. CONSTITUTION:In vulcanizing a tire by heating inert gas by the heater 5 arranged to the central part of a vulcanizing apparatus and circulating the heated inert gas to a bladder 3 by a fan 7 to transmit heat to a tire T through the bladder 3, the inert gas of high temp. in the vulcanizing apparatus is discharged and, at the same time, the inert gas of low temp. is blown in the inert gas of high temp. to control temp. so as to lower the temp. in the bladder by gas exchange.

公开(公告)号：JPH05104540A

公开(公告)日：1993-04-27

申请号：JP29521491

申请日：1991-10-15

Applicant: BRIDGESTONE CORP

Inventor： HASHIRA MASASHI ,  MURAKAMI KAZUYASU ,  HIRAI NOBUYUKI

IPC: B29C35/04 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00

Abstract: PURPOSE:To shorten a vulcanizing time by reducing the temp. difference in a bladder at the time of vulcanization, that is, the temp. difference between the respective parts of a green tire. CONSTITUTION:A bladder is successively filled with steam and inert gas at the time of vulcanization but, when the density of steam is different from that of inert gas, the mixing of steam and inert gas in the bladder 32 becomes inferior. Therefore, the inert gas is heated to predetermined temp., for example, 300-500 deg.C to allow the density of the inert gas to approach that of steam and the mixing of steam and the inert gas is improved to reduce the temp. difference in the bladder 32.

公开(公告)号：JPH0524045A

公开(公告)日：1993-02-02

申请号：JP20367991

申请日：1991-07-19

Applicant: BRIDGESTONE CORP

Inventor： HASHIRA MASASHI ,  MURAKAMI KAZUYASU ,  HIRAI NOBUYUKI ,  IWATA TOSHIRO

IPC: B29C33/04 ,  B29C35/04 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00

Abstract: PURPOSE:To provide a vulcanizing device excellent in thermal efficiency to be able to manufacture a high quality tire by means of uniform degree of vulcanization. CONSTITUTION:A tire vulcanizing device for clamping, heating and vulcanizing a green tire T by means of molds 1 and 2 in which ring spaces are formed and bladders 3 disposed in tension in said ring spaces is provided with a fan 7 for circulating gas in the bladders 3, a heater 5 for heating said gas disposed at the center of ring molds 1 and 2 and a steam generating means 21 for generating steam by spraying the given amount of water to the heater 5.