Title:
車両用タイヤのトレッドバンドを製造する押出し成形方法及びその押出し成形装置
Document Type and Number:
Japanese Patent JP4430141
Kind Code:
B2
Abstract:
A tread band for vehicle tyres is manufactured by conveying a primary elastomer material (4) through an extrusion path (11, 15) defined by a preforming channel (15) followed by an extrusion outlet (11) formed in a die (10). The preforming channel (15) is defined in a preforming device (9) comprising a drawer (12) operatively engaging a preformer (13). Formed in the drawer (12) is an auxiliary channel (17) the end length (17b) of which opens at right angles into the extrusion path (11, 15), close to the extrusion outlet (11). An auxiliary elastomer material (5) conveyed to the auxiliary feeding channel (17) is homogeneously distributed by a coating effect under the lower surface of the tread band (4a) crossing the extrusion outlet (11).
Inventors:
Vincenzo Benatti
Application Number:
JP9175598A
Publication Date:
March 10, 2010
Filing Date:
April 03, 1998
Export Citation:
Assignee:
Pirelli, Tire, Sochieta, Per, Azioni
International Classes:
B29D30/52; B29C48/07; B60C11/00; B29C48/12; B29C48/305; B29D30/00
Domestic Patent References:
| JP8164552A | ||||
| JP2098431A |
Attorney, Agent or Firm:
Kazuo Shamoto
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Shigeru Sakuma
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Shigeru Sakuma