# US 12,759,201 B2 · Rotary multi-injection molding machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,201 B2 - Document ID: US12759201B2 - Status: Granted - Kind: B2 - Application number: 19/131,731 - Filed: 2024-02-22 - Published: 2026-04-23 - Granted: 2026-10-13 - Earliest claimed: 2024-02-22 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Gyuho Lee; Manin Baek; Sik Jeong; Bosung Lee; Jookwon Kim - Web page: https://patentgrep.com/patent/US12759201B2 ## CPC - B29C 45/062: {carrying mould halves co-operating with fixed mould halves} - B29C 45/1742: {Mounting of moulds; Mould supports (mounting of exchangeable mould inserts B29C45/2675)} - B29C 2045/1746: {using magnetic means} - 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 A rotary multi-injection molding machine includes a rotary station in which a rotational driving source is disposed; a rotary disposed above the rotary station and rotates by the rotational driving source; a plurality of molds disposed spaced apart from each other on the rotary, in which a cavity is formed at least one of a fixed mold and a movable mold, and in which an injection passage through which material passes is formed in the movable mold; an injection molding machine for molding and supplying a material; a guide having a guide passage formed therein for guiding the material supplied from the injection molding machine to the injection passage; a lifting and lowering mechanism for lifting and lowering the guide; in which the guide, when the guide is lowered by the lifting and lowering mechanism, may press the movable mold from above the movable mold. ## Claims ### Claim 1 A rotary multi-injection molding machine comprising: a rotary station in which a rotational driving source is disposed; a rotary disposed above the rotary station and rotates by the rotational driving source; a plurality of molds disposed spaced apart from each other on the rotary, in which a cavity is formed at least one of a fixed mold and a movable mold, and in which an injection passage through which material passes is formed in the movable mold; an injection molding machine for molding and supplying a material; a guide having a guide passage formed therein for guiding the material supplied from the injection molding machine to the injection passage; a lifting and lowering mechanism for lifting and lowering the guide; an extraction mechanism for lifting and lowering the movable mold of a mold located in an extraction region among the plurality of molds, and an advance and retreat mechanism for advancing the injection molding machine to the guide or for retreating the injection molding machine from the guide, wherein the guide, when the guide is lowered by the lifting and lowering mechanism, presses the movable mold from above the movable mold, wherein an upper surface of the rotary includes: an injection region in which one of the plurality of molds is located below the guide; a cooling region in which another of the plurality of molds is cooled; and the extraction region in which the other of the plurality of molds is located below the extraction mechanism, wherein the lifting and lowering mechanism maintains the guide at a second height while the rotary is rotating, wherein the lifting and lowering mechanism lowers the guide to a first height when any one of the plurality of molds is moved to the injection region, wherein the advance and retreat mechanism advances the injection molding machine to a first position to connect the injection molding machine to the guide after the guide is lowered by the lifting and lowering mechanism, and wherein the advance and retreat mechanism retreats the injection molding machine to a second position to separate the injection molding machine from the guide before the guide is raised by the lifting and lowering mechanism. ### Claim 2 (depends on 1) The rotary multi-injection molding machine of claim 1, wherein a number of the plurality of molds is three, and wherein the rotary driving source repeats a rotation mode that rotates the rotary by 120° and a stop mode that stops the rotary. ### Claim 3 (depends on 1) The rotary multi-injection molding machine of claim 1, wherein the fixed mold is fixed to an upper surface of the rotary, and wherein the movable mold is seated on an upper surface of the fixed mold. ### Claim 4 (depends on 1) The rotary multi-injection molding machine of claim 1, further comprising a shelf spaced apart from the rotary; and a height adjusting mechanism disposed on the shelf and supporting the injection molding machine and the advance and retreat mechanism. ### Claim 5 (depends on 1) The rotary multi-injection molding machine of claim 1, wherein the guide includes: an injection molding machine facing surface facing the injection molding machine, and a movable mold facing surface facing the movable mold, and wherein an inlet of the guide passage is formed on the injection molding machine facing surface, and wherein an outlet of the guide passage is formed on the movable mold facing surface. ### Claim 6 (depends on 5) The rotary multi-injection molding machine of claim 5, wherein an opening direction of the inlet and an opening direction of the outlet are different. ### Claim 7 (depends on 5) The rotary multi-injection molding machine of claim 5, wherein the guide includes a plurality of peripheral surfaces, a lower surface, and an upper surface, wherein the injection molding machine facing surface is one of the plurality of peripheral surfaces, and wherein the movable mold facing surface is the lower surface. ### Claim 8 (depends on 1) The rotary multi-injection molding machine of claim 1, wherein the guide has a guide heater installed to heat the guide passage. ### Claim 9 (depends on 1) The rotary multi-injection molding machine of claim 1, wherein the lifting and lowering mechanism includes: a lifting and lowering guide; an upper body installed on the lifting and lowering guide; a pressure cylinder installed on the upper body; and a guide holder lifted and lowered by the pressure cylinder, wherein the guide is disposed on the guide holder. ### Claim 10 (depends on 1) The rotary multi-injection molding machine of claim 1, wherein the injection molding machine includes: an injection molding machine body having an internal passage formed; a nozzle installed on the injection molding machine body; a main heater installed in the injection molding machine body; a screw rotatably accommodated in the internal passage; a shaft for rotating the screw; and a shaft supporter for supporting the shaft. ### Claim 11 (depends on 1) The rotary multi-injection molding machine of claim 1, wherein the extraction mechanism includes: a frame; an extraction cylinder supported on the frame; a lifting and lowering body lifted and lowered by the extraction cylinder; and a magnet disposed on the lifting and lowering body and magnetically attached to and detached from the movable mold. ### Claim 12 (depends on 11) The rotary multi-injection molding machine of claim 11, wherein the frame is disposed on the rotary station. ### Claim 13 (depends on 1) The rotary multi-injection molding machine of claim 1, further comprising: an outer slip ring rotating together with the rotary; and an inner slip ring disposed inside the outer slip ring, wherein a space is formed between the outer slip ring and the inner slip ring.