# US 2019/0168291 A1 · Flaskless molding machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168291 A1 - Document ID: US20190168291A1 - Status: Published application - Kind: A1 - Application number: 16/301,824 - Filed: 2017-05-12 - Published: 2019-06-06 - Earliest claimed: 2016-05-17 - Assignees: Sintokogio, Ltd. - Applicants: Sintokogio, Ltd. - Inventors: Koichi SAKAGUCHI; Tokiya TERABE; Tatsumi FUJITA - Web page: https://patentgrep.com/patent/US20190168291A1 ## CPC - B22C 11/10: with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed - B22C 9/02: Sand moulds or like moulds for shaped castings - B22C 15/24: involving blowing devices in which the mould material is supplied in the form of loose particles - B22C 15/28: Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing - B22D 33/04: Bringing together or separating moulds - B22C 19/04: Controlling devices specially designed for moulding machines - B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B) - B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22) ## Abstract A flaskless molding machine includes: an upper sand tank storing the mold sand to be supplied to the upper molding space; a first lower sand tank storing the mold sand to be supplied to the lower molding space, and having a first communication port for discharging the stored mold sand; a second lower sand tank having a second communication port capable of communicating with the first communication port of the first lower sand tank, and storing the mold sand supplied from the first lower sand tank and to be supplied to the lower molding space; at least one first guide member extending in a vertical direction, and guiding the upper flask, the lower flask and the second lower sand tank in the vertical direction; and a second guide member extending in the vertical direction, and guiding the first lower sand tank in the vertical direction. ## Claims ### Claim at position 1 1: A flaskless molding machine forming a flaskless upper mold and lower mold by filling, with mold sand, an upper molding space formed using an upper flask and a lower molding space formed using a lower flask, and by pressurizing the mold sand filled in the upper molding space and the lower molding space, comprising: an upper sand tank storing the mold sand to be supplied to the upper molding space; a first lower sand tank storing the mold sand to be supplied to the lower molding space, and having a first communication port for discharging the stored mold sand; a second lower sand tank having a second communication port capable of communicating with the first communication port of the first lower sand tank, and storing the mold sand supplied from the first lower sand tank and to be supplied to the lower molding space; at least one first guide member extending in a vertical direction, and guiding the upper flask, the lower flask and the second lower sand tank in the vertical direction; and a second guide member extending in the vertical direction, and guiding the first lower sand tank in the vertical direction. ### Claim at position 2 (depends on 1) 2: The flaskless molding machine according to claim 1, further comprising: a drive unit configured to move the second lower sand tank in the vertical direction; and an adjustment drive unit configured to move the first lower sand tank in the vertical direction. ### Claim at position 3 (depends on 1) 3: The flaskless molding machine according to claim 1, wherein the at least one first guide member includes four first guide members, and the upper flask, the lower flask and the second lower sand tank are movably attached to the four first guide members. ### Claim at position 4 (depends on 3) 4: The flaskless molding machine according to claim 3, wherein the four first guide members are disposed in such a way to form a quadrangle with vertices residing at respective centers of the four first guide members, the quadrangle encircling the upper molding space and the lower molding space, when being viewed in the vertical direction, and the four first guide members guide the upper flask, the lower flask and the second lower sand tank in the vertical direction at a sand filling time, a squeezing time and a mold-stripping time. ### Claim at position 5 (depends on 1) 5: The flaskless molding machine according to claim 1, wherein the upper sand tank and the first lower sand tank are provided with permeation members each having a plurality of pores on an inner surface thereof, the pores allowing compressed air to flow. ### Claim at position 6 (depends on 1) 6: The flaskless molding machine according to claim 1, wherein a CB of the mold sand filled in the upper molding space and the lower molding space ranges from 30% to 42%. ### Claim at position 7 (depends on 1) 7: The flaskless molding machine according to claim 1, wherein a compressive strength of the mold sand filled in the upper molding space and the lower molding space ranges from 8 to 15 N/cm2. ### Claim at position 8 (depends on 2) 8: The flaskless molding machine according to claim 2, wherein the at least one first guide member includes four first guide members, and the upper flask, the lower flask and the second lower sand tank are movably attached to the four first guide members. ### Claim at position 9 (depends on 2) 9: The flaskless molding machine according to claim 2, wherein the upper sand tank and the first lower sand tank are provided with permeation members each having a plurality of pores on an inner surface thereof, the pores allowing compressed air to flow. ### Claim at position 10 (depends on 3) 10: The flaskless molding machine according to claim 3, wherein the upper sand tank and the first lower sand tank are provided with permeation members each having a plurality of pores on an inner surface thereof, the pores allowing compressed air to flow. ### Claim at position 11 (depends on 4) 11: The flaskless molding machine according to claim 4, wherein the upper sand tank and the first lower sand tank are provided with permeation members each having a plurality of pores on an inner surface thereof, the pores allowing compressed air to flow. ### Claim at position 12 (depends on 2) 12: The flaskless molding machine according to claim 2, wherein a CB of the mold sand filled in the upper molding space and the lower molding space ranges from 30% to 42%. ### Claim at position 13 (depends on 3) 13: The flaskless molding machine according to claim 3, wherein a CB of the mold sand filled in the upper molding space and the lower molding space ranges from 30% to 42%. ### Claim at position 14 (depends on 4) 14: The flaskless molding machine according to claim 4, wherein a CB of the mold sand filled in the upper molding space and the lower molding space ranges from 30% to 42%. ### Claim at position 15 (depends on 5) 15: The flaskless molding machine according to claim 5, wherein a CB of the mold sand filled in the upper molding space and the lower molding space ranges from 30% to 42%. ### Claim at position 16 (depends on 2) 16: The flaskless molding machine according to claim 2, wherein a compressive strength of the mold sand filled in the upper molding space and the lower molding space ranges from 8 to 15 N/cm2. ### Claim at position 17 (depends on 3) 17: The flaskless molding machine according to claim 3, wherein a compressive strength of the mold sand filled in the upper molding space and the lower molding space ranges from 8 to 15 N/cm2. ### Claim at position 18 (depends on 4) 18: The flaskless molding machine according to claim 4, wherein a compressive strength of the mold sand filled in the upper molding space and the lower molding space ranges from 8 to 15 N/cm2. ### Claim at position 19 (depends on 5) 19: The flaskless molding machine according to claim 5, wherein a compressive strength of the mold sand filled in the upper molding space and the lower molding space ranges from 8 to 15 N/cm2.