The installation is for producing a coextruded profiled element for tires that is made from rubber compounds of different compositions. The installation includes at least one first extruder having a screw with a longitudinal axis and at least one second extruder having a screw with a different longitudinal axis. An extrusion head is connected to each of the extruders by appropriate ducts. The feed inlet of each extruder is connected to the delivery orifice of a gear pump.

A method of forming multilayer polymer composite particles includes coextruding a multilayer polymer composite sheet having alternating first and second polymer layers. The multilayer polymer composite sheet is divided into a plurality of anisotropic multilayer polymer composite microparticles.

A method for applying a strip of elastomeric material to a surface is described. The method of forming a strip of elastomeric material includes the steps of: pumping an elastomeric material through a nozzle, positioning an opening of a nozzle in mating engagement with a rotatable roller, rotating the roller so that rotation of the roller pulls the elastomer material through the outlet of the nozzle, forming a strip.

A cable jacket extruder comprises a chamber, a feeding port disposed at one end of the chamber, an extruding screw disposed inside the chamber, a pathway connected to an outlet at another end of the chamber, wherein a vent is defined on the pathway, and a nozzle connected to the pathway. In another example, a tandem-type cable jacket extruder is provided. The tandem-type cable jacket extruder comprises a first chamber and a second chamber connected in tandem via a pathway, a vent disposed on the pathway, a feeding port disposed at one end of the first chamber, and an extruding screw disposed in each of the first and second chambers. A method for manufacturing cable jackets is also provided.

A multilayer film includes an extruded first polymer layer confined between extruded second polymer layers. The first polymer layer includes a high aspect ratio crystalline lamellae. The multilayer film is substantially impermeable to gas diffusion.

An additive manufacturing system may include an extruder. The extruder may include a barrel having a bore. Additionally, the extruder may include an extruder screw at least partially received within the bore of the barrel. The additive manufacturing system also may include a gear pump fluidly coupled to the bore of the barrel. The extruder screw may extend at least partially into the gear pump.

An additive manufacturing system may include an extruder. The extruder may include a barrel having a bore. Additionally, the extruder may include an extruder screw at least partially received within the bore of the barrel. The additive manufacturing system also may include a gear pump fluidly coupled to the bore of the barrel. The extruder screw may extend at least partially into the gear pump.

A twin-screw extruder is configured to produce rolls of plastic stretch film on a continuous basis, starting from the extrusion of granules of one or more polymers an using cast extrusion.

The present invention is directed to an apparatus for forming a multi-layer web formed from at least two polymeric film tubes in intimate contact with each other but not bonded to each other. The apparatus includes the use of a blown film extrusion die that extrudes two separate blown film polymeric tubes via two separate annular die lips. A fluid cooling system applies cooling fluid across a plurality of surfaces of the two blown film tubes. One of the die lips may be at a different height from the other die lip. The frost line of one blown film tube may be at a different height from the other blown film tube.

The disclosure relates to various measures for increasing the cooling effect on a planetary roller extruder section/module. Those measures include a choke being arranged at an outlet of the planetary roller extruder section or module, a distance between centerlines of adjacent planetary spindles being at least equal to an outer diameter of the planetary spindles, providing a pressurized melt supply, having a cooling section composed of several sections/modules, providing at least one section/module in which a flow, during melt supply is converse to the conveying direction of the extruder, and providing cooling tubes arranged within the central spindle.