# US 2018/0022011 A1 · Molding unit for containers, equipped with a boxing insert with air circulation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022011 A1 - Document ID: US20180022011A1 - Status: Published application - Kind: A1 - Application number: 15/655,156 - Filed: 2017-07-20 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: Sidel Participations - Applicants: Sidel Participations - Inventors: Mikael DERRIEN; Laurent PENET - Web page: https://patentgrep.com/patent/US20180022011A1 ## CPC - B29C 49/783: {blowing pressure} - B29C 49/4802: {with means for locally compressing part(s) of the parison in the main blowing cavity} - B29C 49/4815: {by means of movable mould parts} - B29C 49/4823: {with incorporated heating or cooling means} - B29C 49/06: Injection blow-moulding - B29C 49/4812: {and welding opposite wall parts of the parisons or preforms to each other} - B29C 2045/363: {using a movable core or core part} - B29C 2049/4807: {by movable mould parts in the mould halves} - B29C 2049/4825: {for cooling moulds or mould parts (B29C2049/5889 takes precedence)} - B29C 2049/483: {in different areas of the mould at different temperatures, e.g. neck, shoulder or bottom} - B29C 2049/4861: {Neck portions of bottle producing moulds} - B29C 2949/0715: the preform having one end closed - B29K 2067/003: {PET, i.e. poylethylene terephthalate} - B29L 2031/7158: {Bottles} - 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) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract Molding unit (1) for the forming of a container (2) provided with a hollow recess (3), comprising: a mold (5) provided with a lateral wall (6) defining a cavity (7) and provided with a pocket (9) that comes out into the cavity (7); a boxing device (11) comprising: an insert (12) mounted in translation in the pocket (9) relative to the lateral wall (6) and provided with at least one passage (81) opening out; an actuator (16) integral with the insert (12) and provided with a piston (17) mounted in a chamber (22) defined in the wall (6) of the mold (5), the piston (17) subdividing the chamber (22) into a rear half-chamber (22A) in communication with a primary fluid duct (46), and a front half-chamber (22B) in communication, on the one hand, with a secondary fluid duct (50) and, on the other hand, with the pocket (9). ## Claims ### Claim 1 Molding unit (1) for the forming of a container (2) provided with a hollow recess (3) toward the interior of the container (2), this forming unit (1) comprising: a mold (5) provided with a lateral wall (6) defining a cavity (7) having the impression of at least one portion of the container (2) and that extends along a main axis (X) defining a vertical direction, this lateral wall (6) being provided with a pocket (9) that comes out into the cavity (7); a boxing device (11) comprising: an insert (12) mounted in translation relative to the lateral wall (6) along a transverse axis (T) defining a radial direction, between a retracted position in which the insert (12) is at least partially retracted in the pocket (9), and a deployed position in which the insert (12) projects at least partially into the cavity (7) outside of the pocket (9), an actuator (16) integral with the insert (12) and provided with a piston (17) mounted in translation along the transverse axis (T): wherein: the insert (12) is provided with at least one passage (81) that extends from one rear end (82), by which it opens into the pocket (9), to a front end (83) by which it opens onto a front face (13) of the insert (12); the piston (17) is mounted in a chamber (22) defined in the wall (6) of the mold (5), the piston (17) subdividing the chamber (22) into a rear half-chamber (22A) in communication with a primary fluid duct (46), and a front half-chamber (22B), in communication with both a secondary fluid duct (50), as well as the pocket (9). ### Claim 2 (depends on 1) Molding unit (1) according to claim 1, wherein the (or each) passage (81) is drilled in the body of the insert (12). ### Claim 3 (depends on 1) Molding unit (1) according to claim 1, wherein: the lateral wall (6) of the mold (5) comprises a partition (42) that separates the chamber (22) from the pocket (9), this partition (42) being drilled with a hole (43); the actuator (16) comprises a rod (34) mounted in translation in this hole (43) and on which the insert (12) is fastened; a gap (85) is located between the rod (34) and the hole (43) to make possible the fluid communication between the front half-chamber (22B) and the pocket (9). ### Claim 4 (depends on 3) Molding unit (1) according to claim 3, wherein the rod (34) is grooved. ### Claim 5 (depends on 1) Molding unit (1) according to claim 1, wherein the insert (12) is provided with a plurality of passages (81). ### Claim 6 (depends on 1) Molding unit (1) according to claim 1, wherein the or each passage (81) opens, by its rear end (82), onto a rear face (37) of the insert (12). ### Claim 7 (depends on 1) Molding unit (1) according to claim 1, wherein the chamber (22) is formed by an added sleeve (14), mounted in a complementary recess (15) made in the lateral wall (6) and attached to it, and in which the piston (17) is mounted in translation. ### Claim 8 (depends on 1) Molding unit (1) according to claim 1, wherein the rear half-chamber (22A) is connected to a fluid source having a high pressure, and the front half-chamber (22B) to a fluid source having a comparatively lower pressure. ### Claim 9 (depends on 8) Molding unit (1) according to claim 8, wherein the high pressure is greater than 20 bars, and the lower pressure is less than or equal to 12 bars. ### Claim 10 (depends on 1) Method for using a molding unit (1) according to claim 1, which comprises the following operations: introduction of a blank into the mold (5) with the insert (12) in retracted position; injection, into the blank, of a pressurized fluid; injection of a fluid at high pressure into the rear half-chamber (22A) to move the insert toward its deployed position; after a time lag, injection of a fluid at relatively lower pressure into the front half-chamber (22B) while keeping the rear half-chamber (22A) pressurized; depressurization of the formed container (2); depressurization of the rear half-chamber (22A) while keeping the front half-chamber (22B) pressurized; depressurization of the front half-chamber (22B). ### Claim 11 (depends on 2) Molding unit (1) according to claim 2, wherein: the lateral wall (6) of the mold (5) comprises a partition (42) that separates the chamber (22) from the pocket (9), this partition (42) being drilled with a hole (43); the actuator (16) comprises a rod (34) mounted in translation in this hole (43) and on which the insert (12) is fastened; a gap (85) is located between the rod (34) and the hole (43) to make possible the fluid communication between the front half-chamber (22B) and the pocket (9). ### Claim 12 (depends on 2) Molding unit (1) according to claim 2, wherein the insert (12) is provided with a plurality of passages (81). ### Claim 13 (depends on 3) Molding unit (1) according to claim 3, wherein the insert (12) is provided with a plurality of passages (81). ### Claim 14 (depends on 4) Molding unit (1) according to claim 4, wherein the insert (12) is provided with a plurality of passages (81). ### Claim 15 (depends on 2) Molding unit (1) according to claim 2, wherein the or each passage (81) opens, by its rear end (82), onto a rear face (37) of the insert (12). ### Claim 16 (depends on 3) Molding unit (1) according to claim 3, wherein the or each passage (81) opens, by its rear end (82), onto a rear face (37) of the insert (12). ### Claim 17 (depends on 4) Molding unit (1) according to claim 4, wherein the or each passage (81) opens, by its rear end (82), onto a rear face (37) of the insert (12). ### Claim 18 (depends on 5) Molding unit (1) according to claim 5, wherein the or each passage (81) opens, by its rear end (82), onto a rear face (37) of the insert (12). ### Claim 19 (depends on 2) Molding unit (1) according to claim 2, wherein the chamber (22) is formed by an added sleeve (14), mounted in a complementary recess (15) made in the lateral wall (6) and attached to it, and in which the piston (17) is mounted in translation. ### Claim 20 (depends on 3) Molding unit (1) according to claim 3, wherein the chamber (22) is formed by an added sleeve (14), mounted in a complementary recess (15) made in the lateral wall (6) and attached to it, and in which the piston (17) is mounted in translation.