摘要:
A process of manufacturing a rubber compound is disclosed. The process comprises providing a multiple shaft extruder device; feeding the multiple shaft extruder device with at least one polymer raw material or with a mixture of at least two different polymer raw materials; feeding the multiple shaft extruder device with at least one further raw material; mixing the at least one polymer raw material or the mixture of the different polymer raw materials and the at least one further raw material in the multiple shaft extruder device to prepare a rubber compound; and extruding the rubber compound from the multiple shaft extruder device. A plurality of multiple shaft extruder devices may be used in parallel or in sequence.
摘要:
A mixing apparatus for manufacturing a rubber compound is disclosed. The mixing apparatus comprises a plurality of multiple shaft extruder devices, each comprising at least one inlet for receiving a plurality of materials to be fed into the extruder device and an outlet for discharging a mixed material extruded by the extruder device. The multiple shaft extruder devices are either arranged in such a way that operatively the extrudate of at least one of the plurality of multiple shaft extruder devices can be fed into the inlet of at least one other of plurality of multiple shaft extruder devices, or are arranged to operate in parallel in such a way that operatively the extrudates of the plurality of multiple shaft extruder devices can be fed together into the inlet of at least one further mixing device.
摘要:
A bead core-apex subassembly comprises an annular bead core, a flipper and an apex. The flipper is wrapped about the bead core such that it encloses the bead core. The apex is in contact with the flipper and comprises at least a first segment and a second segment, the first segment having a composition different from the composition of the second segment. A method comprises the steps of providing an annular bead core; wrapping a flipper about the annular bead core; positioning the bead core with the flipper on a rotatable support surface; providing a nozzle in fluid communication with a pumping or extrusion device; rotating the support surface about an axis; and discharging a rubber compound through the nozzle onto the rotating support surface and forming an apex from the discharged rubber compound, the apex being attached to the flipper.
摘要:
A method and apparatus for applying a blended rubber composition directly onto a tire building drum or core is described. A first extruder and a first gear pump for a first compound is provided. A second extruder and a second gear pump for a second compound is provided. The output of the second gear pump is fed into the main extruder. A third gear pump is provided for adding an accelerator mixture; mixing together said first compound and said second compound and said accelerator mixture.
摘要:
A gear pump for moving elastomeric material includes a housing, a first beveled gear, a second beveled gear, and a drive mechanism. The housing has first and second side plates, an internal gear chamber, a material inlet communicating with the chamber, and a material outlet communicating with the chamber. The first beveled gear is disposed within the chamber. The first beveled gear is rotatably mounted about a first axis of rotation to the housing. The second beveled gear is disposed within the chamber. The second beveled gear is rotatably mounted about a second axis of rotation to the housing. The second beveled gear engages the first beveled gear such that rotation of the first beveled gear in a first direction affects rotation of the second beveled gear in a second opposite direction. The first axis of rotation is parallel to the second axis of rotation. The drive mechanism directly drives rotation of the first beveled gear and simultaneously and indirectly drives rotation of the second beveled gear. The rotation of the first and second beveled gears transports the elastomeric material from the material inlet to the material outlet.
摘要:
An apparatus for applying a mixtures of a first compound and a second compound, the apparatus comprising: a first extruder and a first gear pump for a first compound; a second extruder and a second gear pump for a second compound, a third extruder and a third gear pump for an accelerator mixture; a mixing device for mixing together said first compound and said second compound and said accelerator mixture, wherein said mixing device is located downstream of said first, second and third extruders and said first, second and third gear pumps.
摘要:
A method and apparatus is provided for separating two or more annular members such as bead assemblies or bead and apex assemblies. First, a flexible member is inserted into the annulus of the annular members. Next, the flexible member is inflated until the outer surface of the flexible member contacts the inner diameter of the annular member. Then the flexible member is axially expanded until the annular members are separated. Then the flexible member is deflated so that the annular members can be removed.
摘要:
A method and device is provided for reducing the tension on an elastomeric feed strip. The method includes providing a device for engagement with the feed strip, pushing the feed strip forward by the device when the feed strip stops or when the tension exceeds a certain value, and then pushing the strip in the direction of travel.
摘要:
A screw nose for a rubber extruder screw has an upstream portion of increasing diameter providing working engagement of the rubber flowing from the screw with the extruder barrel and a downstream portion of decreasing diameter providing working engagement of the rubber with a converging tapered wall of a flow channel block for reducing the shrinkage and pressure drop at the discharge end of the screw and thereby prevent porosity and blisters in an extruded rubber component.
摘要:
A pneumatic radial ply runflat tire is described. The tire has a carcass structure having at least one radial carcass ply, two bead regions, two sidewalls, each sidewall having an upper sidewall portion that connects to the shoulders and being reinforced by an insert, a belt structure between the tread and the carcass, and an air impermeable inner liner formed of a butyl rubber located radially inward of the carcass structure wherein the air impermeable inner liner extends from a first shoulder region to a second shoulder underneath the crown portion of the tire, and does not extend from the shoulder to the bead portion of the tire.