US3822737A - Apparatus for preparing foundry molds or cores from cold quick setting sand/binder/catalyst mixtures - Google Patents

Apparatus for preparing foundry molds or cores from cold quick setting sand/binder/catalyst mixtures Download PDF

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US3822737A
US3822737A US00237699A US23769972A US3822737A US 3822737 A US3822737 A US 3822737A US 00237699 A US00237699 A US 00237699A US 23769972 A US23769972 A US 23769972A US 3822737 A US3822737 A US 3822737A
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mixing chamber
chamber
mixing
outlet
blowing
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A Edwards
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Baker Perkins Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/0472—Parts; Accessories; Controlling; Feeding; Discharging; Proportioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles

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  • This invention relates to a method and apparatus for preparing foundry moulds or cores from a quick cold setting sand/binder/catalyst mixture.
  • the invention provides a method of preparing a foundry mould or core comprising supplying separate charges of sand and binder on the one hand and sand and catalyst on the other hand to a mixing chamber in which the separate charges are mechanically intermixed to produce a final sand/binder/catalyst mixture, passing the final mixture by gravity into a blowing chamber and moving the mixing chamber and the blowing chamber apart to allow the final mixture to be blown from the blowing chamber into a mould or core box and to allow the mixing. chamber to be cleaned by cleaning means.
  • metered quantities of said charges are supplied to the mixing chamber whilst an outlet of the mixing chamber is closed, said charges being mixed in the mixing chamber for a predetermined time period and the outlet then being opened to discharge the final mixture.
  • the invention may be carried into effect either by movement of the mixing chamber to a position in which it is cleaned by said cleaning means, or alternatively by movement of the blowing chamber to a position in which the final mixture is blown from the blowing chamber into the mould or core box.
  • the invention further provides apparatus for preparing foundry moulds or cores comprising a mixing chamber, supply means for providing the mixing chamber with separate charges of sand and binder on the one hand and sand and catalyst on the other hand, a mechanical mixing element in the mixing chamber, an outlet from the mixing.
  • the mixing chamber may be movable between a first position in which it is adapted to deliver the mixed material to the blowing chamber, and a second position in which the mixing chamber is adapted to be cleaned by said cleaning means, or alternatively the blowing chamber may be movable between a first position in which it is adapted to receive the final mixture from the mixingchamber, and a second position in which the final mixture can be discharged into the mould or core box.
  • the purging means comprises compressed gas.
  • FIG. 1 is a diagrammatic view of apparatus according to one embodiment of the invention.
  • FIGS.- 2 and 3 are diagrammatic view of modified FIG. 6 is a vertical section of a cylindrical mixing chamber showing the mixer.
  • FIG. 7 is a top view of FIG. 6.
  • a pair of screwtype combined mixer conveyor units for example units of the type described in our US. Patent Specification No. 1,051,651 are supplied with metered quanti ties of sand and resin (or any other binder) and'sand and catalyst respectively and discharge their respective mixtures into twin reservoirs 2.
  • a first slide valve 3 controlling communication between the reservoirs and a mixing chamber 4 is opened admitting the separate mixtures to the mixing chamber.
  • the second pair of blades 18 are fixedly attached to a cross member 20 which also serves to sweep the roof of the mixing chamber.
  • a conventional blowing chamber or core shooter 6 has an inlet 6a controlled by a third slide valve 7, the inlet 6av being formed in a top plate 6b.
  • a rotary mixing element having said pair of tangentially mounted angle iron members with ri gid blades attached thereto, comprising the first pair of blades, is used, the mixing chamber being used as a batch mixer wherein metered amounts of the two separate mixers are introduced into the mixing chamber and intermixed for a predetermined period of time and then discharged.
  • valve 7 can be open and valve 5 is closed.
  • valve 3 is closed, and after mixing, the mixing chamber is slid across the top plate 6b, valve 5 is opened and when the mixing chamber outlet communicates with inlet 6a (as shown dotted) the final mixture is transferred by gravity into the core shooter.
  • the core mixing chamber is connected to a source of com pressed air which enters the chamber through tangentially disposed ports in the cylindrical wall to purge any materialremaining in the chamber into a suitable receptacle.
  • valve 7 is opened and the apparatus is ready for the preparation of a further mould or core.
  • the apparatus shown in FIG. 2 is similar to that shown in FIG. 1 and like references are used to refer to like parts.
  • the reservoirs 2 and valve 3 are eliminated and the separate mixtures are supplied to the mixing chamber by operation of the combined mixer conveyor units 1 for a period sufficient to provide the required amount of materials for a core or mould being prepared.
  • the final mixture is transferred directly by gravity into the core shooter by opening valves 5 and 7.
  • these valves are closed, the mixture is shot, and the mixing chamber is moved to one side (shown dotted) for purging by opening of valve 5. After purging the mixing chamber is returned to its initial position for the next cycle.
  • the apparatus shown in FIG. 3 is similar in construction and operation to the apparatus shown in FIG. 2 except that the outlet slide valve 5 of the mixing chamber is eliminated and the materials received from units 1 are intermixed by the rotary mixing element as they are passed substantially straight through the mixing chamber and into the core shooter.
  • FIG. 4 shows apparatus according to another embodiment of the invention in a mixing and charging position
  • FIG. 5 shows the apparatus in a position in which the core shooter or blowing chamber has been moved to a position for blowing the core or mould and for cleaning the mixing chamber.
  • the core or mould is shot by applying compressed air to the top and/or side of the core shooter and at the same time the mixing chamber 4 is purged with compressed gas into a suitable container.
  • the core or mould is removed and valve 5 is closed ready for the chamber 4 to receive further ingredients for a fresh mix.
  • the core shooter 6 is returned to its original position shown in FIG. 4 for the next cycle.
  • the core shooter or blowing head can be constructed to move on rollers running in tracks, slides or the like and driven by gears or pulleys from an electric motor.
  • the driving force can be a pneumatic or hydraulic piston and cylinder assembly and the core shooter or blowing head can be mounted for pivotal movement through a gear quadrant or the like.
  • FIGS. 1, 2, .3 and 4 can operate with mixing chamber constructions different to that described above and it is to be understood that the core shooters used with the equipment of the invention namely the supply means and movable mixing chamber, are in each case of a quite conventional known type.
  • Apparatus for preparing foundry moulds or cores from cold quick-setting sand/binder/catalyst mixtures comprising a mixing chamber, supply means for providing the mixing chamber with separate charges of sand and binder on the one hand and sand and catalyst on the other hand, a mechanical mixing element in the mixing chamber, an outlet from the mixing chamber for passing material by gravity from the mixing chamber into a blowing chamber, means for moving the mixing chamber and the blowing chamber apart to allow the final mixture to be discharged from the blowing chamber into a mould or core box and to allow the mixing chamber to be purged and purging means for the mixing chamber.
  • the mixing chamber is movable between a first position in which it is adapted to deliver the mixed material to the blowing chamber, and a second position in which the mixing chamber is adapted to be purged by said purging means.
  • blow ing chamber is movable between a first position in which it is adapted to receive the final mixture from the mixing chamber, and a second position in which the final mixture can be discharged into the mould or core box.
  • said purging means comprises means for supplying gas to the chamber.
  • the mixing chamber comprises a vertical cylindrical wall, a base wall with an outlet therein and a vertical axis rotary mixing element in the chamber, the element comprising a pair of angle iron members tangentially mounted to said'axis and having rigid blades attached thereto adapted to sweep the base wall and a pair of spring steel blades angularly offset from said pair of angle iron members adapted to sweep the vertical wall.
  • outlet of the mixing chamber is provided with a time controlled outlet valve adapted to close the outlet during a mixing operation and to open the outlet after a predetermined time interval for discharging the final mixture into the blowing chamber.
  • Apparatus according to claim 8 wherein metered amounts of said separate charges are intermixed in the mixing chamber in separate batches for a time interval of 10 seconds.
  • the mixing chamber comprises a vertical cylindrical wall, a base wall with an outlet therein and a vertical axis rotary mixing element in the chamber, the outlet comprising a pair of angle iron members tangentially mounted to said axis and having rigid blades attached thereto adapted to sweep the base wall and a pair of 11.
  • Apparatus according to claim 10 wherein the totary mixing element is rotated at a speed of RPM.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

A method and apparatus for preparing foundry moulds or cores wherein separate charges of sand and binder on the one hand and sand and catalyst on the other hand are supplied to a mixing chamber in which the separate charges are mechanically intermixed to produce a final sand/binder/catalyst mixture. The final mixture is then passed by gravity into a blowing chamber and the mixing chamber and the blowing chamber are moved apart to allow the final mixture to be blown from the blowing chamber into a mould or core box and further to allow the mixing chamber to be cleaned by suitable cleaning means.

Description

United States Patent [191 Edwards [451 July 9, 1974 [54] APPARATUS FOR PREPARING FOUNDRY 3,439,733 4/1969 Miller et a1. 164/21 X MOLDS 0 CORES FROM COLD QUICK 3,494,412 2/1970 Abraham 259/8 X 3,580,326 5/1971 Edwards 164/21 UX if? g BINDER/ CATALYST 3,662,812 5/1972 Godding 164/21 x [75] Inventor: Albert Edwards, Peterborough, FOREIGN PATENTS OR APPLICATIONS England 784,525 10/1957 Great Britain 259/8 [73] Assignee: Baker Perkins Limited,
Pet rsb r h, E l d Primary Exammer--R. Spencer'Annear [2 F ed Mar 4 1972 Attorney, Agent, or Firm-Larson, Taylor and Hinds 21 A l. N 237,699 1 pp 57 ABSTRACT 30 Foreign Application p i D A method and apparatus for preparing foundry Mar 29 1971 Great Britain 8094/7] moulds or cores wherein separate charges of sand and 197] Great Britain 41 m binder on the one hand and sand and catalyst on the v other hand are supplied to a mixing chamber in which the separate charges are mechanically intermixed to 2] US. Cl 164/158, 164/22, 1642/28/08, produce a fin a1 sandlbinder/catalyst mixture. The final [51] Int Cl B22C 15/22 mixture is then passed by gravity into ablowing cham- [58] Fieid T l64/2O 22 her and the mixing chamber and the blowing chamber 259/7 8 are moved apart to allow the final mixture to be blown from the blowing chamber into a mould or core box 56] References Cited and further to allow the mixing chamber to be cleaned UNITED STATES PATENTS by suitable cleaning means.
2,223,018 11/1940 Christensen 259/7 12 Claims, 7 Drawing Figures PATENTED JUL 91974 SHEET PATENTEU JUL 91974 SHEET 3 BF 3 FlGb.
APPARATUS FOR PREPARING FOUNDRY MOLDS OR CORES FROM COLD QUICK SETTING SAND/BINDER/CATALYST MIXTURES This invention relates to a method and apparatus for preparing foundry moulds or cores from a quick cold setting sand/binder/catalyst mixture.
The invention provides a method of preparing a foundry mould or core comprising supplying separate charges of sand and binder on the one hand and sand and catalyst on the other hand to a mixing chamber in which the separate charges are mechanically intermixed to produce a final sand/binder/catalyst mixture, passing the final mixture by gravity into a blowing chamber and moving the mixing chamber and the blowing chamber apart to allow the final mixture to be blown from the blowing chamber into a mould or core box and to allow the mixing. chamber to be cleaned by cleaning means.
.Preferably, metered quantities of said charges are supplied to the mixing chamber whilst an outlet of the mixing chamber is closed, said charges being mixed in the mixing chamber for a predetermined time period and the outlet then being opened to discharge the final mixture.
The invention may be carried into effect either by movement of the mixing chamber to a position in which it is cleaned by said cleaning means, or alternatively by movement of the blowing chamber to a position in which the final mixture is blown from the blowing chamber into the mould or core box. The invention further provides apparatus for preparing foundry moulds or cores comprising a mixing chamber, supply means for providing the mixing chamber with separate charges of sand and binder on the one hand and sand and catalyst on the other hand, a mechanical mixing element in the mixing chamber, an outlet from the mixing. chamber for passing material by gravity from the mixing chamber into a blowing chamber, means for moving the mixing chamber and the blowing chamber apart to allow the final mixture to be discharged from the blowing chamber into a mould or core box and to allow the mixing chamber to be cleane'dby cleaning means..-
y The mixing chamber may be movable between a first position in which it is adapted to deliver the mixed material to the blowing chamber, and a second position in which the mixing chamber is adapted to be cleaned by said cleaning means, or alternatively the blowing chamber may be movable between a first position in which it is adapted to receive the final mixture from the mixingchamber, and a second position in which the final mixture can be discharged into the mould or core box. Preferably, the purging means comprises compressed gas.
The invention will now be described, by way of example, with reference to the accompanying drawings in which:
FIG. 1 is a diagrammatic view of apparatus according to one embodiment of the invention, and
FIGS.- 2 and 3 are diagrammatic view of modified FIG. 6 is a vertical section of a cylindrical mixing chamber showing the mixer.
FIG. 7 is a top view of FIG. 6.
In the arrangement shown in FIG. 1, a pair of screwtype combined mixer conveyor units 1, for example units of the type described in our US. Patent Specification No. 1,051,651 are supplied with metered quanti ties of sand and resin (or any other binder) and'sand and catalyst respectively and discharge their respective mixtures into twin reservoirs 2. When material is required to prepare a mould or core, a first slide valve 3 controlling communication between the reservoirs and a mixing chamber 4 is opened admitting the separate mixtures to the mixing chamber.
The mixing chamber may be of the type disclosed in our co-pending Patent Application No. 8095/71 which has been cognated'with our other 'co-pending Application No. 55725/71, i.e., of the type shownin FIGS. 6 and 7 comprising a vertical cylindrical wall 8, a base wall with an outlet 10 therein and a vertical=axis rotary mixing element 12 in the chamber, the element comtached thereto, or diametrically opposed spring steel blades adapted to sweep the base wall and a further pair of spring steel blades 18 angularly offset from the first pair adapted to sweep the vertical wall. The second pair of blades 18 are fixedly attached to a cross member 20 which also serves to sweep the roof of the mixing chamber. With this construction, if 'a mixing element, having diametrically opposed spring steel blades, is rotated at about RPM, it has been found that the materials can be intermixed as they fall through the mixing chamber in about three quarters of a revolution of the mixing element. Accordingly, the outlet from the mixing chamber, controlled by a second slide valve 5 is suitably angularly offset from the inlet. A conventional blowing chamber or core shooter 6 has an inlet 6a controlled by a third slide valve 7, the inlet 6av being formed in a top plate 6b. j
Preferably, a rotary mixing element having said pair of tangentially mounted angle iron members with ri gid blades attached thereto, comprising the first pair of blades, is used, the mixing chamber being used as a batch mixer wherein metered amounts of the two separate mixers are introduced into the mixing chamber and intermixed for a predetermined period of time and then discharged.
During mixing, valve 7 can be open and valve 5 is closed. When sufficient material for a core or mould being prepared has been delivered to the mixing chamber, valve 3 is closed, and after mixing, the mixing chamber is slid across the top plate 6b, valve 5 is opened and when the mixing chamber outlet communicates with inlet 6a (as shown dotted) the final mixture is transferred by gravity into the core shooter. The core mixing chamber is connected to a source of com pressed air which enters the chamber through tangentially disposed ports in the cylindrical wall to purge any materialremaining in the chamber into a suitable receptacle.
After purging, valve is again closed, valve 7 is opened and the apparatus is ready for the preparation of a further mould or core.
The apparatus shown in FIG. 2 is similar to that shown in FIG. 1 and like references are used to refer to like parts. The reservoirs 2 and valve 3 are eliminated and the separate mixtures are supplied to the mixing chamber by operation of the combined mixer conveyor units 1 for a period sufficient to provide the required amount of materials for a core or mould being prepared. In this case, after mixing, the final mixture is transferred directly by gravity into the core shooter by opening valves 5 and 7. Then these valves are closed, the mixture is shot, and the mixing chamber is moved to one side (shown dotted) for purging by opening of valve 5. After purging the mixing chamber is returned to its initial position for the next cycle.
The apparatus shown in FIG. 3 is similar in construction and operation to the apparatus shown in FIG. 2 except that the outlet slide valve 5 of the mixing chamber is eliminated and the materials received from units 1 are intermixed by the rotary mixing element as they are passed substantially straight through the mixing chamber and into the core shooter.
FIG. 4 shows apparatus according to another embodiment of the invention in a mixing and charging position and FIG. 5 shows the apparatus in a position in which the core shooter or blowing chamber has been moved to a position for blowing the core or mould and for cleaning the mixing chamber.
In operation, separate mixtures of sand and binder on the one hand and sand and catalyst on the other hand are supplied from twin mixer conveyor type units 1 through a divided hopper 2 into a mixing chamber 4. Mechanical mixing means of the type as described above is operative in the mixing chamber, the duration of mix being dependent on the amount of ingredients present in the chamber and the chamber can be of the type disclosed in Application No. 8095/71 cognated with No. 55725/71. It has been found preferable that the duration of mix should be of the order of about seconds. After mixing, the final mixture is transferred directly by gravity into the core shooter or blowing chamber 6 by opening valves 5 and 7. Valve 7 is then closed and the core shooter 6 is moved across to a posi tion as shown in FIG. 5 for the shooting operation. The core or mould is shot by applying compressed air to the top and/or side of the core shooter and at the same time the mixing chamber 4 is purged with compressed gas into a suitable container. The core or mould is removed and valve 5 is closed ready for the chamber 4 to receive further ingredients for a fresh mix. The core shooter 6 is returned to its original position shown in FIG. 4 for the next cycle.
The core shooter or blowing head can be constructed to move on rollers running in tracks, slides or the like and driven by gears or pulleys from an electric motor. Alternatively, the driving force can be a pneumatic or hydraulic piston and cylinder assembly and the core shooter or blowing head can be mounted for pivotal movement through a gear quadrant or the like.
It is envisaged that the arrangements shown in FIGS. 1, 2, .3 and 4 can operate with mixing chamber constructions different to that described above and it is to be understood that the core shooters used with the equipment of the invention namely the supply means and movable mixing chamber, are in each case of a quite conventional known type.
I claim:
1. Apparatus for preparing foundry moulds or cores from cold quick-setting sand/binder/catalyst mixtures comprising a mixing chamber, supply means for providing the mixing chamber with separate charges of sand and binder on the one hand and sand and catalyst on the other hand, a mechanical mixing element in the mixing chamber, an outlet from the mixing chamber for passing material by gravity from the mixing chamber into a blowing chamber, means for moving the mixing chamber and the blowing chamber apart to allow the final mixture to be discharged from the blowing chamber into a mould or core box and to allow the mixing chamber to be purged and purging means for the mixing chamber. 1
2. Apparatus according to claim 1 wherein the mixing chamber is movable between a first position in which it is adapted to deliver the mixed material to the blowing chamber, and a second position in which the mixing chamber is adapted to be purged by said purging means.
3. Apparatus according to claim 1 wherein the blow ing chamber is movable between a first position in which it is adapted to receive the final mixture from the mixing chamber, and a second position in which the final mixture can be discharged into the mould or core box.
4. Apparatus according to claim 1 wherein said purging means comprises means for supplying gas to the chamber.
5. Apparatus according to claim 1 wherein the mixing chamber comprises a vertical cylindrical wall, a base wall with an outlet therein and a vertical axis rotary mixing element in the chamber, the element comprising a pair of angle iron members tangentially mounted to said'axis and having rigid blades attached thereto adapted to sweep the base wall and a pair of spring steel blades angularly offset from said pair of angle iron members adapted to sweep the vertical wall.
6. Apparatus according to claim 5 wherein said second pair of blades are fixedly attached to a cross member which also serves to sweep a roof of the mixing chamber.
7. Apparatus according to claim 6 wherein the outlet of the mixing chamber is offset from an inlet of the mixing chamber through 270 in a direction of rotation of the rotary mixing element.
8. Apparatus according to claim 7 wherein the outlet of the mixing chamber is provided with a time controlled outlet valve adapted to close the outlet during a mixing operation and to open the outlet after a predetermined time interval for discharging the final mixture into the blowing chamber.
9. Apparatus according to claim 8 wherein metered amounts of said separate charges are intermixed in the mixing chamber in separate batches for a time interval of 10 seconds.
10. Apparatus according to claim 1 wherein the mixing chamber comprises a vertical cylindrical wall, a base wall with an outlet therein and a vertical axis rotary mixing element in the chamber, the outlet comprising a pair of angle iron members tangentially mounted to said axis and having rigid blades attached thereto adapted to sweep the base wall and a pair of 11. Apparatus according to claim 10 wherein the totary mixing element is rotated at a speed of RPM.
12. Apparatus according to claim 1 wherein the mixing chamber comprises a vertical cylindrical wall which is provided with tangentially disposed ports for connec tion to a source of said cleaning means to purge any material remaining in the mixing chamber, after discharge of the final mixture, into a suitable receptacle. =k =l

Claims (12)

1. Apparatus for preparing foundry moulds or cores from cold quick-setting sand/binder/catalyst mixtures comprising a mixing chamber, supply means for providing the mixing chamber with separate charges of sand and binder on the one hand and sand and catalyst on the other hand, a mechanical mixing element in the mixing chamber, an outlet from the mixing chamber for passing material by gravity from the mixing chamber into a blowing chamber, means for moving the mixing chamber and the blowing chamber apart to allow the final mixture to be discharged from the blowing chamber into a mould or core box and to allow the mixing chamber to be purged and purging means for the mixing chamber.
2. Apparatus according to claim 1 wherein the mixing chamber is movable between a first position in which it is adapted to deliver the mixed material to the blowing chamber, and a second position in which the mixing chamber is adapted to be purged by said purging means.
3. Apparatus according to claim 1 wherein the blowing chamber is movable between a first position in which it is adapted to receive the final mixture from the mixing chamber, and a second position in which the final mixture can be discharged into the mould or core box.
4. Apparatus according to claim 1 wherein said purging means comprises means for supplying gas to the chamber.
5. Apparatus according to claim 1 wherein the mixing chamber comprises a vertical cylindrical wall, a base wall with an outlet therein and a vertical axis rotary mixing element in the chamber, the element comprising a pair of angle iron members tangentially mounted to said axis and having rigid blades attached thereto adapted to sweep the base wall and a pair of spring steel blades angularly offset from said pair of angle iron members adapted to sweep the vertical wall.
6. Apparatus according to claim 5 wherein said second pair of blades are fixedly attached to a cross member which also serves to sweep a roof of the mixing chamber.
7. Apparatus according to claim 6 wherein the outlet of the mixing chamber is offset from an inlet of the mixing chamber through 270* in a direction of rotation of the rotary mixing element.
8. Apparatus according to claim 7 wherein the outlet of the mixing chamber is provided with a time controlled outlet valve adapted to close the outlet during a mixing operation and to open the outlet after a predetermined time interval for discharging the final mixture into the blowing chamber.
9. Apparatus according to claim 8 wherein metered amounts of said separate charges are intermixed in the mixing chamber in separate batches for a time interval of 10 seconds.
10. Apparatus according to claim 1 wherein the mixing chamber comprises a vertical cylindrical wall, a base wall with an outlet therein and a vertical axis rotary mixing element in the chamber, the outlet comprising a pair of angle iron members tangentially mounted to said axis and having rigid blades attached thereto adapted to sweep the base wall and a pair of spring steel blades angularly offset from said pair of angle iron members adapted to sweep the vertical wall, the mixing chamber having an inlet, the outlet of the mixing chamber being offset from the inlet through 270* in a direction of rotation of the rotary mixing element and wherein the outlet of the mixing chamber is permanently open so that the material in the mixing chamber is intermixed by the rotary mixing element as said material is passed substantially straight through the mixing chamber and into the blowing chamber.
11. Apparatus according to claim 10 wherein the rotary mixing element is rotated at a speed of 120 RPM.
12. Apparatus according to claim 1 wherein the mixing chamber comprises a vertical cylindrical wall which is provided with tangentially disposed ports for connection to a source of said cleaning means to purge any material remaining in the mixing chamber, after discharge of the final mixture, into a suitable receptacle.
US00237699A 1971-03-29 1972-03-24 Apparatus for preparing foundry molds or cores from cold quick setting sand/binder/catalyst mixtures Expired - Lifetime US3822737A (en)

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GB809471A GB1369445A (en) 1971-03-29 1971-12-22 Method and apparatus for preparing foundry moulds and cores

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946796A (en) * 1973-06-28 1976-03-30 British Cast Iron Research Association Apparatus for making sand-resin molds
US4056259A (en) * 1975-03-03 1977-11-01 Societe D'applications De Procedes Industriels Et Chimiques S.A.P.I.C. Process and apparatus for the continuous preparation of a mixture for foundry molds or the like, with formation of a premix
US4135569A (en) * 1977-07-13 1979-01-23 Acme-Cleveland Corporation Molding machine clean out
US4174906A (en) * 1975-03-03 1979-11-20 Societe D'applications De Procedes Industriels Et Chimiques S.A.P.I.C. Process and apparatus for the continuous preparation of a mixture for foundry molds or the like, with formation of a premix
US4175866A (en) * 1975-11-26 1979-11-27 Baker Perkins Holdings Limited Method of operating a foundry sand mixing machine
US4329063A (en) * 1975-11-26 1982-05-11 Baker Perkins Holdings Ltd. Foundry sand mixing machine
US4491418A (en) * 1981-11-17 1985-01-01 Maillefer S.A. Plastics extruder
US4616936A (en) * 1984-09-10 1986-10-14 Ber Fong Huang Construction of a foaming machine
US4798471A (en) * 1986-05-20 1989-01-17 Joachim Laempe Apparatus for making molding sand
WO2019127800A1 (en) * 2017-12-27 2019-07-04 苏州明志科技有限公司 Sand mixing process for improving comprehensive property of resin sand
US11666964B2 (en) * 2016-05-17 2023-06-06 Sintokogio, Ltd. Flaskless molding machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54110183A (en) * 1978-02-16 1979-08-29 Toyobo Co Ltd Membrane separator
JPH0341818Y2 (en) * 1984-11-30 1991-09-02
DE4020933A1 (en) * 1990-06-06 1991-12-12 Rheinische Maschinenfabrik & E Core of mould box filler - has sand firing container linked to compressed air supply through a firing valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223018A (en) * 1937-05-03 1940-11-26 Herbert S Simpson Apparatus for mixing molding sand
GB784525A (en) * 1954-12-08 1957-10-09 Powlings Patent Processes Ltd Apparatus for mixing cereals and the like
US3439733A (en) * 1965-12-27 1969-04-22 Sherwin Williams Co Foundry molding machine
US3494412A (en) * 1967-03-29 1970-02-10 Sherwin Williams Co Foundry mold blowing machine with multi-stage mixer
US3580326A (en) * 1968-03-27 1971-05-25 British Cast Iron Res Ass Apparatus for making foundry cores and moulds
US3662812A (en) * 1966-05-14 1972-05-16 British Cast Iron Res Ass Apparatus for mixing sand/resin/catalyst and blower-forming foundry cores

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1200507A (en) * 1968-02-16 1970-07-29 British Motor Corp Ltd Production of foundry cores
GB1237106A (en) * 1968-11-30 1971-06-30 British Motor Corp Ltd Production of foundry cores

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223018A (en) * 1937-05-03 1940-11-26 Herbert S Simpson Apparatus for mixing molding sand
GB784525A (en) * 1954-12-08 1957-10-09 Powlings Patent Processes Ltd Apparatus for mixing cereals and the like
US3439733A (en) * 1965-12-27 1969-04-22 Sherwin Williams Co Foundry molding machine
US3662812A (en) * 1966-05-14 1972-05-16 British Cast Iron Res Ass Apparatus for mixing sand/resin/catalyst and blower-forming foundry cores
US3494412A (en) * 1967-03-29 1970-02-10 Sherwin Williams Co Foundry mold blowing machine with multi-stage mixer
US3580326A (en) * 1968-03-27 1971-05-25 British Cast Iron Res Ass Apparatus for making foundry cores and moulds

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946796A (en) * 1973-06-28 1976-03-30 British Cast Iron Research Association Apparatus for making sand-resin molds
US4056259A (en) * 1975-03-03 1977-11-01 Societe D'applications De Procedes Industriels Et Chimiques S.A.P.I.C. Process and apparatus for the continuous preparation of a mixture for foundry molds or the like, with formation of a premix
US4174906A (en) * 1975-03-03 1979-11-20 Societe D'applications De Procedes Industriels Et Chimiques S.A.P.I.C. Process and apparatus for the continuous preparation of a mixture for foundry molds or the like, with formation of a premix
US4175866A (en) * 1975-11-26 1979-11-27 Baker Perkins Holdings Limited Method of operating a foundry sand mixing machine
US4329063A (en) * 1975-11-26 1982-05-11 Baker Perkins Holdings Ltd. Foundry sand mixing machine
US4135569A (en) * 1977-07-13 1979-01-23 Acme-Cleveland Corporation Molding machine clean out
US4491418A (en) * 1981-11-17 1985-01-01 Maillefer S.A. Plastics extruder
US4616936A (en) * 1984-09-10 1986-10-14 Ber Fong Huang Construction of a foaming machine
US4798471A (en) * 1986-05-20 1989-01-17 Joachim Laempe Apparatus for making molding sand
US11666964B2 (en) * 2016-05-17 2023-06-06 Sintokogio, Ltd. Flaskless molding machine
WO2019127800A1 (en) * 2017-12-27 2019-07-04 苏州明志科技有限公司 Sand mixing process for improving comprehensive property of resin sand

Also Published As

Publication number Publication date
JPS4944851B1 (en) 1974-11-30
GB1369445A (en) 1974-10-09
DE2215887C3 (en) 1974-05-16
FR2132148A1 (en) 1972-11-17
DE2215887A1 (en) 1972-11-23
IT951825B (en) 1973-07-10
FR2132148B1 (en) 1974-12-20
DE2215887B2 (en) 1973-10-18

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