GB857109A - Improvements in or relating to the hardening of moulds and cores - Google Patents

Improvements in or relating to the hardening of moulds and cores

Info

Publication number
GB857109A
GB857109A GB2245958A GB2245958A GB857109A GB 857109 A GB857109 A GB 857109A GB 2245958 A GB2245958 A GB 2245958A GB 2245958 A GB2245958 A GB 2245958A GB 857109 A GB857109 A GB 857109A
Authority
GB
United Kingdom
Prior art keywords
temperature
vaporiser
gas
liquid
moulds
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
GB2245958A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Walther and Co AG
Original Assignee
Walther and Co AG
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 by Walther and Co AG filed Critical Walther and Co AG
Publication of GB857109A publication Critical patent/GB857109A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/162—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents use of a gaseous treating agent for hardening the binder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B22C9/123—Gas-hardening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K21/00—Fluid-delivery valves, e.g. self-closing valves
    • F16K21/04—Self-closing valves, i.e. closing automatically after operation
    • F16K21/06—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening
    • F16K21/10—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening with hydraulic brake cylinder acting on the closure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

857,109. Making moulds and mould cores. WALTER & CIE A.G. July 14, 1958 [July 16, 1957], No. 22459/58. Class 87(2). [Also in Group XXIX] Moulds and cores containing a medium such as water glass hardenable by CO 2 are hardened by applying CO 2 which has been first discharged in liquid form from pressure cylinders or storage containers and then passed through a vaporiser, the final temperature of the gaseous CO 2 being such as to produce rapid optimum hardening. The liquid CO 2 is stored in steel cylinders a, b, or a low pressure heat insulated container f maintained at a low temperature, and passes along a conduit c to a pipe coil inside vaporiser d, the temperature of which is maintained by an adjustable heating element e. From there the CO 2 gas passes through a reducing valve h and then at about 2 atmos. pressure into a discharge valve i. In the the case of water glass being used as binding medium, the temperature of the heat transferring liquid in the vaporiser d may, for example, be at about 85‹C. and the final temperature of the CO 2 will be about 35‹C. With high consumption of CO 2 and inadequately dimensioned heat transfer surfaces, the temperature of the gas may fall below the desired value and to avoid this a second pipe coil may be provided in the vaporiser which heats the cooled gas discharging through the reducing valve again to the desired temperature. So that the heat transfer liquid need be heated only slightly above the desired temperature, e.g. 35‹C., a small buffer vessel is arranged in the vaporiser and is constantly filled with a store of preheated CO 2 gas. The discharge valve is adjustable so as to control the amount of gas supplied to the mould or core.
GB2245958A 1957-07-16 1958-07-14 Improvements in or relating to the hardening of moulds and cores Expired GB857109A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0021502 1957-07-16

Publications (1)

Publication Number Publication Date
GB857109A true GB857109A (en) 1960-12-29

Family

ID=7597035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2245958A Expired GB857109A (en) 1957-07-16 1958-07-14 Improvements in or relating to the hardening of moulds and cores

Country Status (3)

Country Link
CH (1) CH364077A (en)
FR (1) FR1199899A (en)
GB (1) GB857109A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102632201A (en) * 2012-04-10 2012-08-15 武汉中精金属制品有限公司 Precision investment casting water glass binder shell CO2 gas hardening technology
WO2012138306A1 (en) * 2011-04-04 2012-10-11 Ipragaz Anonim Sirketi An embodiment that produces energy from lpg in liquid phase
RU2486987C2 (en) * 2010-12-29 2013-07-10 Виктор Наумович Ромашкин Method of combined moulds from liquid-glass self-hardening mixes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977209A (en) * 1987-12-24 1990-12-11 Foseco International Limited Production of articles of bonded particulate material and binder compositions for use therein from phenol-formaldehyde and oxyanion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2486987C2 (en) * 2010-12-29 2013-07-10 Виктор Наумович Ромашкин Method of combined moulds from liquid-glass self-hardening mixes
WO2012138306A1 (en) * 2011-04-04 2012-10-11 Ipragaz Anonim Sirketi An embodiment that produces energy from lpg in liquid phase
CN102632201A (en) * 2012-04-10 2012-08-15 武汉中精金属制品有限公司 Precision investment casting water glass binder shell CO2 gas hardening technology

Also Published As

Publication number Publication date
CH364077A (en) 1962-08-31
FR1199899A (en) 1959-12-16

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