Sumitomo Rubber Industries Limited

Masahiko Ohki

Naohiko Kikuchi

Yuichi Saito

Norio Taniguchi

Shuichi Yamamori

Isao Ohiwa

Takeshi Toyoshima

An apparatus for manufacturing a strip of rubber compounds comprises four extruders () and a single extruder head (). The extruder head () comprises an extruder die assembly () and a main body (). The main body () is composed of a pair of laterally-spaced lateral blocks (), a central block () disposed between the lateral blocks, and a pair of laterally-spaced sub blocks () disposed beneath the lateral blocks (). The central block () has a pair of V-form side faces () extending in a V-shaped formation down to lateral ends of the bottom face (S). The lateral blocks () are each provided with an upper mount face (U) and a lower mount face (L) on which two of the four extruders are respectively attached. An upper preforming channel (Ua,Ub) extending from an extruder to the die assembly has a parting plane along the V-form side face (). A lower preforming channel (Lc,Ld) extending from an extruder to the die assembly also has a parting plane.

Apparatus for manufacturing rubber strip

An apparatus for making strips of fiber-containing rubber is disclosed, wherein the short fibers in each of the strips are oriented in the widthwise direction of the strip. The apparatus comprises: a screw section for pushing out a fluid mixture of unvulcanized rubber and short fibers as fiber-containing rubber; an orienting section comprising a radially extending path provided with an inlet in the center thereof and a looped nozzle on the periphery thereof so that the fiber-containing rubber is expanded circumferentially while flowing radially from the center towards the periphery; and a dividing section comprising a plurality of cutters arranged around the looped nozzle so that the fiber-containing rubber extruded from the looped nozzle is circumferentially divide into a plurality of strips.

Apparatus for making fiber-containing rubber strips

Increase or decrease in rubber extruding rate can be freely adjusted while keeping a sectional shape of a rubber extruded intermediate constant. A discharge port of a rubber flow path of a die plate is of a flat shape with a lower section and a higher section and with a height varying along a width direction. An extruding speed from the discharge port of the die plate is made uniform at positions along the width direction of said rubber extruded intermediate.

Method and apparatus for rubber extruding

An apparatus is provided for making an unvulcanized rubber tape having a finished thickness TO in a range of from 0.3 to 1.5 mm, comprising an extruder which includes a passage for unvulcanized rubber defining an outlet for the extruded unvulcanized rubber, and a pair of calendar rollers disposed near the outlet for adjusting the thickness of the extruded unvulcanized rubber passing therebetween, wherein the passage is comprised of a transforming part having an inlet for the unvulcanized rubber at its upstream-side end, and a thinning part on the downstream side thereof defining the outlet at its downstream-side end, with the transforming part gradually changing in the cross sectional shape from a circle to a flat shape in the lower course of the passage, and the thinning part having a flat cross sectional shape and gradually decreasing in thickness in the lower course of the passage.

Apparatus for making unvulcanized rubber tape

An apparatus for making rubber component parts such as tire rubber parts comprises: a tape maker for making an unvulcanized rubber tape which comprises an extruder for extruding unvulcanized rubber; a winding drum around which the unvulcanized rubber tape is wound into a rubber component part; a conveyor for conveying the unvulcanized rubber tape toward the winding drum which comprises a conveyor belt winding around rollers and having a right side on which the unvulcanized rubber tape is put; and a traverser for moving the conveyor belt in the axial direction of the winding drum.

Apparatus for making rubber component parts with conveyor for unvulcanized rubber tape

An elastomeric extruding apparatus having a head, to which a plurality of extruders are coupled, and a rotatable, driven roller disposed at the front end of the head so as to form an extruding space between the roller and the head. The head is provided with a passage arrangement, through which the elastomeric materials pass, eventually opening into the extruding space. The extruding space has a uniform chamber extending from the opening of the passage arrangement and a finishing chamber communicating with the uniform chamber for shaping the elastomer into its final sectional shape.

Elastomeric extruding apparatus

A multi-extrusion die assembly for use in a multi-extrusion arrangement for thermoplastic materials in which undesirable oozing out or exuding of thermoplastic material through mating surfaces between a die box and a preformer or deformation of extruded material at a second introducing passage, etc. are prevented through improvements on the disposition of extruders and constructions of the die box and preformer, while attaching and detaching of a block and a lower box with respect to the die box are facilitated for efficient extrusion.

Growing community of inventors

Kobe, Japan

Masahiko Ohki