The present disclosure relates to a facility for forming a wood plastic composite by mixing and extruding wood powder and a polymer resin. According to a facility of the present disclosure, in a process of forming a wood plastic composite, gas and water vapor contained in wood powder and polymer resin are efficiently removed, and thus, a coupling force between wood powder and polymer resin increases, and also, wood powder is uniformly dispersed inside polymer resin, and thus, physical properties of a wood plastic composite to be formed is not degraded, and in addition, since there is no stagnant section while molten liquid of wood powder and polymer resin passes through each apparatus in the facility, wood powder is prevented from carbonizing or polymer resin is prevented from solidifying, and thus, physical properties of the wood plastic composite to be formed are maintained constant.

The present disclosure relates to a facility for forming one of a graphene-polymer resin composite and a carbon material-polymer resin composite. According to the facility of the present disclosure, in a process of forming the composite, gas and water vapor contained in graphene, a carbon material, and a polymer resin are effectively removed resulting in an increase in coupling force between the polymer resin and one of the graphene and the carbon material, and the graphene and the carbon material is uniformly dispersed inside the polymer resin resulting in no degradation of physical properties of the composite, and also, the polymer resin may be prevented from carbonizing and solidifying because there is no stagnant section while molten liquid of the polymer resin and one of the graphene and the carbon material passes through each apparatus in the facility, and thus, physical properties of the composite are maintained constant.

An extruder screw includes a screw main body, conveyance portions, barrier portions, and paths. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in an opposite direction to a conveyance direction of the conveyance portions. The exit is opened in the outer circumferential surface of the screw main body at a position on an upstream side in the conveyance direction in the conveyance portions in which the entrance is opened.

An extruder screw includes a screw main body, conveyance portions, barrier portions, and paths. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in an opposite direction to a conveyance direction of the conveyance portions. The exit is opened in the outer circumferential surface of the screw main body at a position on an upstream side in the conveyance direction in the conveyance portions in which the entrance is opened.

The invention relates to an extruder (30) comprising a housing (31), a first material inlet (32) for a mixture (46) at least consisting of a solvent and a dissolved medium, a material outlet (33), a screw (35), a screw drive (34), and at least one distillation region (36a-d) between the inlet (32) and the outlet (33), which allows an outflow of solvent, and a discharge line (43-45) for the solvent.

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 sealing device for sealing a venting port of an extrusion apparatus. The sealing device includes a saddle having a saddle counter bore and a seal ring positioned in the saddle counter bore of the saddle. The sealing device also includes a barrel counter bore provided in a barrel of the extrusion apparatus. The saddle counter bore and the barrel counter bore are dimensioned to receive the seal ring, wherein when the seal ring is positioned in the saddle counter bore and the barrel counter bore, a seal is formed between the seal ring in all range of processing temperatures, the saddle and the barrel to prevent the unwanted leakage of high pressure melt.

An extruder including a housing, a first material inlet for a mixture at least consisting of a solvent and a dissolved medium, a material outlet, a screw, a screw drive, and at least one distillation region between the inlet and the outlet, which allows an outflow of solvent, and a discharge line for the solvent.

A method of recovering lactide which includes introducing a molten resin composition that contains a polylactic acid, a depolymerization catalyst and a carrier resin into a vent chamber (3) that is maintained under a reduced pressure using a first screw conveyer passage (11) that extends in the vent chamber (3), gasifying the lactide contained in the molten resin composition, and recovering a gaseous lactide from the vent chamber, wherein a second screw conveyer passage (60) is provided under the first screw conveyer passage (11) in the vent chamber (3) to recover the carrier resin.

A method of recovering lactide which includes introducing a molten resin composition that contains a polylactic acid, a depolymerization catalyst and a carrier resin into a vent chamber (3) that is maintained under a reduced pressure using a first screw conveyer passage (11) that extends in the vent chamber (3), gasifying the lactide contained in the molten resin composition, and recovering a gaseous lactide from the vent chamber, wherein a second screw conveyer passage (60) is provided under the first screw conveyer passage (11) in the vent chamber (3) to recover the carrier resin.