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8177413 |
Scientifically designed barrier screw
A novel barrier screw scientifically designed with new structural features that eliminate the shortcomings of the previous barrier screws and further improve their performance. The important new...
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8167478 |
Kneading screw and extruder
A kneading screw is disclosed which comprises a screw body, the screw body comprising a feed section and a kneading section, the feed section comprising screw segments for feeding a to-be-kneaded...
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8011823 |
Clay kneader
A clay kneader has a drum having a pressure raising section on a supply opening side, an extrusion section having an inner diameter smaller than that of the pressure raising section on side of an...
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7967905 |
Process for mixing modified bitumen by extrusion
Provided is a method of mixing a modified bitumen composition and feeding one or more polymeric materials to an extruder, together with asphalt fed at more than one location along a length of the...
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7785094 |
High capacity extrusion die assembly
High-capacity extrusion die assemblies (20, 90, 130, 140, 180, 252) each having a tubular section (44, 146, 162, 268) and an elongated, axially rotatable, helically flighted screw section (56, 56a,...
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7629435 |
Method for producing masticated rubber
A method for producing a masticated rubber, which comprises the steps of masticating rubber at a shear rate of from 500 to 4,500 (l/s); and obtaining masticated rubber having a weight-average...
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7494264 |
Method of injection molding or extruding a polymer composition using a low compression screw
A method of injection molding or extruding a polymer composition having a predetermined bulk density associated with particles, granules or pellets of the polymer composition and a predetermined...
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7464485 |
Apparatus and method for dehumidifying and drying resin pellets
A method for dehumidifying and drying resin pellets that can efficiently dry both non-crystallized resin pellets and crystallized resin pellets, the apparatus being adapted to downsizing. A control...
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7452508 |
Aspirating and mixing of liquids within a probe tip
Apparatus and a method for mixing a liquid within a disposable aspirating probe tip so that most of the liquid is forced to move past a transition zone between two different inside diameters to...
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7329037 |
Plasticating screw for an extruder or extrusion press, having a narrower land width in the transition region
A plasticating screw for an extruder or an extrusion press has a thread change, whereby the volume of the transporting cross-section does not change and thus a pressure increase in the region of...
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7156550 |
Apparatus for plasticating thermoplastic resin including polypropylene
Apparatus according to this invention for plasticating a resin polymer, especially polypropylene, includes a barrel having an inlet, outlet, and inner surface. A screw, located within and closely...
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7150615 |
Molding machine for injection foaming
A process for injection-foaming a thermoplastic resin by using an injection molding machine with a two-stage-compression screw, injecting a physical foaming agent into the cylinder of the machine...
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7101165 |
Extrusion molding apparatus for ceramic molded product
An extrusion molding apparatus comprises a shaping die for producing a ceramic molded product, and a screw extruder having built therein an extruding screw (40) for mixing while leading a ceramic...
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7101166 |
Apparatus for extruding ceramic molding
The extruding apparatus has the molding die to form the ceramic molding, the screw extruder containing the extrusion screw to knead and guide the ceramic material toward the molding die. The...
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7014353 |
Plasticating screw and apparatus
A rotatable screw for moving material in a plasticating process along an axis through a conduit from an inlet to an outlet. The screw having a feed section, barrier melting section, reorientation...
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6988821 |
Plastics screw with barrier members
A screw rotates in a containment barrel, and comprises a shaft having an upstream end and a downstream end At least one flight is secured to the surface of the shaft and extends helically in...
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6974243 |
Screw element for same-sense rotating multi-screw extruders
A screw element includes an outer radius Ra and a core radius Ri for multiscrew extruders with co-rotating and intermeshing screw shafts. The screw element has in axial cross section through its...
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6921191 |
Injection/extruder screw
The present invention concerns a screw for moving plastic through a barrel in a direction of flow from a drive to a tip. The screw has a shaft having opposing first and second ends, a drive located...
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6887062 |
Extruder screw tip and associated flow channel
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...
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6854873 |
Extruder for processing rubber mixtures
The invention relates to an extruder for the preparation of rubber mixtures for elastomeric products and comprises a cylinder, an endless screw rotatably mounted in the cylinder for uptake...
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6790025 |
Extrusion molding apparatus
An extrusion molding apparatus capable of improving the extrusion rate of the ceramic material without a major reconstruction of a drive system is disclosed. The extrusion molding apparatus...
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6752528 |
Plasticating screw for efficient melting and mixing of polymeric material
A new plasticity apparatus including a rotating and reciprocating screw having a hellcal flight that is wrapped around a core, disposed within and cooperting with the inner wall of a heated barrel...
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6726464 |
Mixing device for manufacturing molding
An apparatus for manufacturing moldings by which clear colors and patterns can be brought out without a remarkable lowering of strength. Immediately before delivery to a metal mold, outer resin...
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6705753 |
Extruder comprising blister mechanism
An extruder for polymer melts, with an extrusion space arranged in an extruder barrel and through which at least one extruder screw shank extends so that it can be rotated by a motor. The screw...
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6672752 |
Extrusion apparatus with winding socket
An extrusion apparatus is provided having an extrusion worm with a threaded exterior passage and rotatably driven by a drive shaft operatively couplable with a drive motor for driving rotation of...
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6672753 |
Apparatus for plasticating thermoplastics
A plasticating screw having a feed section, barrier melting section, reorientation section and metering section disposed sequentially downstream wherein solid material is moved from a trail side of...
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6652254 |
Molding apparatus including screw for molded articles of thermoplastic gas impregnated resin
The invention provides a molding apparatus adapted to use a screw having an overall length permitting the use of an existing molding machine cylinder as it is, and is capable of realizing a gas...
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6609819 |
Twin screw extruder with conical non-parallel converging screws
An improved twin screw extruder device (14) is provided which is capable of producing a wide variety of high quality extrudates having greatly varying final properties, without the need for...
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6607299 |
Apparatus for removing debris from thermoplastic materials
An apparatus for filtering thermoplastic synthetic plastic material has a screw (5) bearingly supported within a housing (1) for rotation around its longitudinal axis for the transport and...
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6599004 |
Extruder screw with improved energy efficient melting
An extruder screw includes an energy transfer section divided into successive barrier sections in which a channel formed by a first thread is divided into at least two sub-channels by a second...
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6513963 |
Multi-staged vented extrusion screw with dual channel depth pumping section
A vented, multi-staged rotary screw extruder is taught for extruding thermoplastic materials. The screw has a final pumping-section of the screw that includes two or more channel depths which...
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6454454 |
Polymer melting and extruding apparatus with linear downstream threads
An extruder screw mechanism has a barrel that is heated by heating coils, an internal screw, and a cylindrical melt sleeve having a plurality of circumferentially spaced, axially extending, radial...
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6345976 |
Injection apparatus
There is provided an injection apparatus comprised of a heating cylinder which is closed by a front end member having a nozzle. The apparatus is further comprised of a plasticating screw in the...
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6331069 |
Concrete extrusion machine and spiral conveyor therefor
A spiral conveyor for a concrete extrusion machine has a first spiral conveyor section with a first external diameter. There is a second spiral conveyor section having a second external diameter...
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6312148 |
Removal of gaseous phase from continuous mixing chamber for rubber compound
A continuous mixing apparatus and process for preparing a rubber compound in an elongated mixing chamber defined by the volume between a radially inner surface of a stator and a radially outer...
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6293690 |
Vented single stage barrier screw with a gas vent hole and axial bore in the screw for venting gases
A barrel contains an extruder conveying screw which has a drive end, a feed section, a melting section and a pumping section wherein the screw has a vent hole located from 0 to 2 screw diameters...
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6247836 |
Injection screw for injection molding a preform of a polyester resin
When a desired preform is to be molded from a molding material which is a polyester resin composed of a blend of PET and PEN by compressing and melting the molding material by the rotation of a...
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6234659 |
Surge suppressor for vented injection molding machine screw
A plasticating apparatus adapted to handle a wide variety of synthetic resinous materials without predrying. The plasticating apparatus includes a two-stage screw rotatably and reciprocably mounted...
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6227692 |
Double wave screw
A plasticating screw having improved mixing capability for polymer blends comprises a feed zone having a helical flight defining a solid material feed path, a compression zone for converting the...
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6179461 |
Extruder screw
An axially elongated extruder screw includes a screw body having an axially extending extruding portion defined by a feed section at an inlet end of the screw, a metering section at an outlet end...
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6176606 |
Extruder screw
An axially elongated extruder screw includes a screw body having an axially extending extruding portion defined by a feed section at an inlet end of the screw, a metering section at an outlet end...
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6139179 |
Extruder screw having multi-channeled barrier section
An axially elongated extruder screw includes a screw body having an axially extending extruding portion defined by a feed section at an inlet end of the screw, a metering section at an outlet end...
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6136246 |
Screw extruder with improved dispersive mixing elements
A screw extruder (10) having a barrel (18) which has a bore (26) defining an inner surface (44) and one or more extruder screws (28), positioned within the bore (26). The extruder screw or screws...
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6132075 |
Multichannel wave screw with a slush channel barrier section
A multichannel wave screw with a slush channel barrier section adapted to provide a consistent mixture of 50% solids and 50% melt to both channels of the double wave metering section. The screw...
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6129873 |
Process for removing moisture and volatiles from pellets in single screw extruders
In a process for extruding a thermoplastic resin in a single screw extruder, a barrel of a single screw extruder has a channel, a feed section and a first melt seal located after the feed section....
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6080346 |
Extrusion apparatus and method and extruded thermoplastic polymer
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6062719 |
High efficiency extruder
A corotating multiple-screw extruder comprising first and second intermeshing screws of more than one flight. The first screw comprises first and second segments paired with first and second...
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6056430 |
Plasticating apparatus having a multichannel wave screw with a cross channel solids transition
A multichannel wave plasticating screw having a feed section, barrier melting section, and metering section wherein solid material is transitioned from the trailing side of the primary flight to...
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5984517 |
Injection screw
An injection screw comprise a rear end to a front end of an effective length of the screw compartmented in the order of a feed zone, a compression zone and a metering zone, wherein the metering...
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5965173 |
Plasticating apparatus and screw therefor
Plasticating apparatus includes a barrel having an inlet for the introduction of resinous material and an outlet for the discharge of plasticated molten extrudate, along with a screw rotatably...
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