# US 12,759,209 B2 · Extrusion device and extrusion molding die used by same, monitoring device and program, strand manufacturing method, and strand diameter adjustment method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,209 B2 - Document ID: US12759209B2 - Status: Granted - Kind: B2 - Application number: 18/272,580 - Filed: 2021-11-15 - Published: 2024-03-07 - Granted: 2026-10-13 - Earliest claimed: 2021-03-03 - Assignees: The Japan Steel Works, Ltd. - Applicants: The Japan Steel Works, Ltd. - Inventors: Yohei Fukuzawa; Yusuke Fukushi; Tomoya Oda; Hideki Tomiyama - Web page: https://patentgrep.com/patent/US12759209B2 ## CPC - B29C 48/92: Measuring, controlling or regulating - B29C 48/302: {being adjustable, i.e. having adjustable exit sections} - B29C 48/345: Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising - B29C 2948/92123: Diameter or circumference - B29C 2948/92523: Force; Tension - B29C 2948/92619: Diameter or circumference - B29C 2948/92704: Temperature - B29C 2948/92904: Die; Nozzle zone - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) ## Abstract An extrusion device includes a cylinder, a raw material feed port, a screw incorporated in cylinder, a die disposed at one end of the cylinder, and adjustment mechanisms. Raw material feed port supplies raw materials including resin into cylinder. Screw is able to melt the raw materials through kneading. Die includes a plurality of through-holes for ejecting strands made of molten resin supplied from cylinder. Adjustment mechanisms individually adjust ejection amounts of the strands ejected from the plurality of through-holes. ## Claims ### Claim 1 An extrusion device comprising: a cylinder; a raw material feed port configured to supply raw materials including resin into the cylinder; a screw that is incorporated in the cylinder and kneads the raw materials, allowing the raw materials to be molten; a die that is disposed at one end of the cylinder and includes a plurality of through-holes to eject strands made of molten resin supplied from the cylinder; and an adjustor that adjusts individually an ejection amount of the strand ejected from each of the plurality of through-holes, wherein the adjustor includes, for each through-hole, a corresponding temperature adjustment unit to individually adjust a temperature of the strand ejected from a corresponding through-hole. ### Claim 2 (depends on 1) The extrusion device according to claim 1, wherein the adjustor includes a moving unit that is provided for each of the plurality of through-holes and is allowed to project into the corresponding through-hole, and the ejection amount of the strand ejected from the through-hole per unit time is adjusted by changing an amount of projection of the moving unit into the corresponding through-hole and thereby adjusting a sectional area of the through-hole. ### Claim 3 (depends on 2) The extrusion device according to claim 2, wherein the moving unit includes a screw mechanism that changes the amount of projection into the corresponding through-hole by the moving units rotating. ### Claim 4 (depends on 2) The extrusion device according to claim 2, wherein the adjustor further includes a driving unit to drive the moving unit. ### Claim 5 (depends on 4) The extrusion device according to claim 4, wherein the driving unit is any of a pneumatic type, a hydraulic type, or an electric type. ### Claim 6 (depends on 1) The extrusion device according to claim 1, wherein the adjustor includes a tension adjustment unit to adjust tension acting on the strand ejected from the through-hole. ### Claim 7 (depends on 1) The extrusion device according to claim 1, further comprising: a monitor that detects strand diameter of the strand ejected from the die. ### Claim 8 (depends on 7) The extrusion device according to claim 7, further comprising: a control device that controls the adjustor on a basis of the strand diameter detected by the monitor. ### Claim 9 (depends on 8) The extrusion device according to claim 8, wherein the control device controls the adjustor to reduce variations in detected strand diameter. ### Claim 10 (depends on 9) The extrusion device according to claim 9, wherein the control device calculates an average value of the detected strand diameters, and controls the adjustor such that a difference between each strand diameter and an average value falls within a predetermined range. ### Claim 11 An extrusion molding die comprising: a main body portion in which a flow-in port, a plurality of through-holes and a flow path portion are formed, kneaded molten resin being supplied to the flow-in port, strands of the supplied molten resin being ejected from the plurality of through-holes, the flow path portion extending in a flow path direction from the flow-in port to the plurality of through-holes; and an adjustor that is able to adjust individually an ejection amount of the strand ejected from each of the plurality of through-holes, wherein the adjustor includes, for each through-hole, a corresponding temperature adjustment unit to individually adjust a temperature of the strand ejected from a corresponding through-hole. ### Claim 12 An extrusion device comprising: a cylinder; a raw material feed port configured to supply raw materials including resin into the cylinder; a screw that is incorporated in the cylinder and kneads the raw materials, allowing the raw materials to be molten; a die that is disposed at one end of the cylinder and includes a plurality of through-holes to eject strands made of molten resin supplied from the cylinder; and an adjustor that adjusts individually an ejection amount of the strand ejected from each of the plurality of through-holes, wherein the adjustor includes, for each through-hole, a corresponding temperature adjustment unit to individually adjust a temperature of the strand ejected from a corresponding through-hole, and wherein the adjustor includes a tension adjustment unit to adjust tension acting on the strands ejected from the through-holes. ### Claim 13 An extrusion molding die comprising: a main body portion in which a flow-in port, a plurality of through-holes and a flow path portion are formed, kneaded molten resin being supplied to the flow-in port, strands of the supplied molten resin being ejected from the plurality of through-holes, the flow path portion extending in a flow path direction from the flow-in port to the plurality of through-holes; and an adjustor that is able to adjust individually an ejection amount of the strand ejected from each of the plurality of through-holes, wherein the adjustor includes, for each through-hole, a corresponding temperature adjustment unit to individually adjust a temperature of the strand ejected from a corresponding through-hole, and wherein the adjustor includes a tension adjustment unit to adjust tension acting on the strands ejected from the through-holes.