The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2002
Filed:
Sep. 13, 2000
Hiroshi Ikegami, Osaka, JP;
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Abstract
With the same screw diameter as in conventional screw extruders, the screw length is reduced, whereby the material residue is reduced, the throughput is increased, the screw motive power is reduced, the temperature control is facilitated to prevent rubber scorching, and extrusion molding of a vulcanizalbe rubber composition is made possible at a lower temperature. In a composite extruding apparatus of rubber, a gear pump is connected to a tip end of a screw extruder via a screen mesh having a breaker plate , and a die head is connected to an ejecting side of the gear pump , wherein the screw extruder plasticizes a fed rubber composition G mainly by friction with an inner surface of a barrel and by heating from outside and extrudes the rubber composition G from the screen mesh to a space on an inlet side of the gear pump ; the screen mesh rectifies the rubber composition G passing through the screen mesh towards the gear pump while stirring and plasticizing the rubber composition G by friction and shear; and the gear pump further stirs and platicizes the ruber composition G, which is fed to the space on the inlet side, by shear and compression, and gives a forcing pressure to the die head