GB1296486A - - Google Patents

Info

Publication number
GB1296486A
GB1296486A GB1296486DA GB1296486A GB 1296486 A GB1296486 A GB 1296486A GB 1296486D A GB1296486D A GB 1296486DA GB 1296486 A GB1296486 A GB 1296486A
Authority
GB
United Kingdom
Prior art keywords
sand
chamber
level
motor
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1296486A publication Critical patent/GB1296486A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D22/00—Control of humidity
    • G05D22/02—Control of humidity characterised by the use of electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/82—Pan-type mixers, i.e. mixers in which the stirring elements move along the bottom of a pan-shaped receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • 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
    • B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

1296486 Cooling granular material NATIONAL ENG CO OF CANADA Ltd 7 April 1970 [10 April 1969] 16489/70 Heading F4U Hot foundry sand is passed through a chamber in which it is cooled by a supply of water which is automatically controlled according to the electrical resistance of the sand in the chamber. The resistance depends on the moisture content of the sand and therefore, approximately, on the temperature of the sand. As illustrated, sand passes from a conveyor 12, through a chute 16, into the chamber 20, The sand is moved through the chamber to an outlet, Fig. 4 (not shown), by two rotary stirring assemblies 18 and 50 driven by a common motor 70. The current drawn by the motor is sensed and the resulting signal is used to control the position of a door at the outlet from the chamber. The motor current depends on the load on the motor and therefore on the level of sand in the chamber, and the control system is such that the door operates to maintain a constant sand level. The chamber 20 is bounded by a rubber sidewall 30 having apertures 48, formed by crossed slits, through which air is passed from a blower 46. The air aids in the cooling of the sand by the evaporation of water which is added from a header 100. The supply of water is governed by a valve 110 which is controlled by a system responsive to both the electrical resistance of the sand and the level of the sand. The resistance is measured by passing current between at least one pair of electrodes 130 mounted in the rubber wall 30. An electrode is illustrated in detail in Fig. 2 (not shown) and comprises a conducting disc hold in place on the inner surface of the wall by a bolt which passes through the wall for connection to a lead wire. The valve 110 is opened at regular intervals to admit water unless the resistance of the sand is such as to indicate that no cooling is required. The valve control system is also responsive to the motor current so that if the sand level falls below the level of the electrodes the valve is rendered inoperative.
GB1296486D 1969-04-10 1970-04-07 Expired GB1296486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81500869A 1969-04-10 1969-04-10

Publications (1)

Publication Number Publication Date
GB1296486A true GB1296486A (en) 1972-11-15

Family

ID=25216601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296486D Expired GB1296486A (en) 1969-04-10 1970-04-07

Country Status (6)

Country Link
US (1) US3599649A (en)
CH (1) CH508430A (en)
DE (2) DE7011928U (en)
FR (1) FR2038371B1 (en)
GB (1) GB1296486A (en)
SE (1) SE368997B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112872290A (en) * 2021-02-23 2021-06-01 云南师范大学 Recovery unit of environmental protection molding sand

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098494A (en) * 1976-09-02 1978-07-04 National Engineering Company Method and apparatus for making battery paste
DE2908861C3 (en) * 1979-03-07 1981-12-17 Dossmann GmbH Eisengießerei und Maschinenfabrik, 6968 Walldürn Method and device for automatic water metering when operating a foundry cooling drum for the simultaneous cooling of molding and core sand and casting
WO2002074467A1 (en) * 2001-03-20 2002-09-26 Nv Engineering Gmbh Method and device for the cooling preparation of warm bulk materials
DE60110849T2 (en) * 2001-12-20 2006-02-23 Disa Industries A/S DEVICE FOR IMPROVING THE DELIVERY OF MOLDED MATERIAL MATERIAL TO THE HOPPER OF A CASTING MACHINE FOR THE MANUFACTURE OF MOLDING TOOLS
CN103736916A (en) * 2013-12-31 2014-04-23 常州市卓信机电设备制造有限公司 Automatic temperature and humidity detection control system of double-plate cooler
DE102015104340A1 (en) * 2015-03-23 2016-09-29 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Molding sand coolers
CN108213337A (en) * 2016-12-15 2018-06-29 杭州冠南精密铸造有限公司 A kind of sand temperature cooling system and its application method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824282A (en) * 1954-02-10 1958-02-18 Milton E Posey Electrode assembly
US2863191A (en) * 1956-10-01 1958-12-09 Harry W Dietert Company Sand conditioning equipment
US2954215A (en) * 1956-10-19 1960-09-27 Superlite Builders Supply Comp Moisture control apparatus
US3129928A (en) * 1961-06-16 1964-04-21 Butler Bin Company Water feed control system for concrete mixers
US3256573A (en) * 1963-05-08 1966-06-21 Pettibone Mulliken Corp Sand mulling apparatus
US3395834A (en) * 1966-05-04 1968-08-06 Nat Eng Co Automatically controlled mixer discharge system
US3456906A (en) * 1966-05-05 1969-07-22 Nat Eng Co Cooling and conditioning unit for granular material
FR1523579A (en) * 1966-05-05 1968-05-03 Nat Eng Co Apparatus for cooling and treating grain materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112872290A (en) * 2021-02-23 2021-06-01 云南师范大学 Recovery unit of environmental protection molding sand

Also Published As

Publication number Publication date
DE2015642B2 (en) 1972-05-25
DE2015642A1 (en) 1972-05-25
DE7011928U (en) 1970-10-01
US3599649A (en) 1971-08-17
FR2038371B1 (en) 1973-10-19
CH508430A (en) 1971-06-15
FR2038371A1 (en) 1971-01-08
SE368997B (en) 1974-07-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PE20 Patent expired after termination of 20 years