Abstract: An apparatus for manufacturing a strip of rubber compounds comprises four extruders (2a, 2b, 2c, 2d) and a single extruder head (3). The extruder head (3) comprises an extruder die assembly (6) and a main body (4). The main body (4) is composed of a pair of laterally-spaced lateral blocks (11), a central block (10) disposed between the lateral blocks, and a pair of laterally-spaced sub blocks (13) disposed beneath the lateral blocks (11). The central block (10) has a pair of V-form side faces (15) extending in a V-shaped formation down to lateral ends of the bottom face (S1). The lateral blocks (11) are each provided with an upper mount face (21U) and a lower mount face (21L) on which two of the four extruders are respectively attached. An upper preforming channel (24Ua, 24Ub) extending from an extruder to the die assembly has a parting plane along the V-form side face (15). A lower preforming channel (24Lc, 24Ld) extending from an extruder to the die assembly also has a parting plane.

Abstract: 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.

Abstract: An apparatus for manufacturing a strip of rubber compounds comprises four extruders (2a, 2b, 2c, 2d) and a single extruder head (3). The extruder head (3) comprises an extruder die assembly (6) and a main body (4). The main body (4) is composed of a pair of laterally-spaced lateral blocks (11), a central block (10) disposed between the lateral blocks, and a pair of laterally-spaced sub blocks (13) disposed beneath the lateral blocks (11). The central block (10) has a pair of V-form side faces (15) extending in a V-shaped formation down to lateral ends of the bottom face (S1). The lateral blocks (11) are each provided with an upper mount face (21U) and a lower mount face (21L) on which two of the four extruders are respectively attached. An upper preforming channel (24Ua, 24Ub) extending from an extruder to the die assembly has a parting plane along the V-form side face (15). A lower preforming channel (24Lc, 24Ld) extending from an extruder to the die assembly also has a parting plane.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An apparatus for making a very thin unvulcanized rubber tape having a finished thickness T0 in a range of from 0.3 to 1.

Abstract: 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.

Abstract: 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.

Abstract: Derivatives of pyrazole represented by the general formula: ##STR1## wherein R.sup.1 represents an alkyl group of 7 to 11 carbon atoms and R.sup.2 represents a hydrogen atom or a lower alkyl group, have therapeutic activity with a very low mammalian toxicity, and in particular can be used in the treatment of hyperlipemia.