GB780039A - Improvements in or relating to the production of moulds and cores - Google Patents

Improvements in or relating to the production of moulds and cores

Info

Publication number
GB780039A
GB780039A GB3271754A GB3271754A GB780039A GB 780039 A GB780039 A GB 780039A GB 3271754 A GB3271754 A GB 3271754A GB 3271754 A GB3271754 A GB 3271754A GB 780039 A GB780039 A GB 780039A
Authority
GB
United Kingdom
Prior art keywords
valve
mould
sand
plate
orifice
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
GB3271754A
Inventor
Donald Horace Snelson
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.)
Foundry Services Ltd
Original Assignee
Foundry Services Ltd
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 Foundry Services Ltd filed Critical Foundry Services Ltd
Priority to GB3271754A priority Critical patent/GB780039A/en
Publication of GB780039A publication Critical patent/GB780039A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Abstract

780,039. Moulding-processes. FOUNDRY SERVICES, Ltd. Nov. 10, 1955 [Nov. 11, 1954], No. 32717/54. Class 83 (1). Moulds and cores are made by blowing a mixture of sand and gas-hardenable binder into a mould or core-box, and applying a gaseous hardening agent thereto as the mixture is entering the mould or core-box. The blow-plate 12 has an orifice 2c and a chamber 2e extending therearound, with vents between the chamber and the orifice. Mounted on the flow-plate is a sand container 14, which supports a blower 16 having a spring-loaded valve 17 in the bottom thereof, which valve may be operated by a lever 19. The interior of the blower is connected to a compressed-air line 22. CO 2 at a pressure of approximately 750 lb/in.<SP>2</SP>, in a bottle 24, may be fed through a reduction-valve 27, gas-reservoir 29 with relief-valve 30, and solenoid-valve 32 to the hollow blow-plate 12. Operation of the lever 19 to open the valve 17 to blow the sand into the box 10, operates a micro-switch 35 which energizes the valve 32 and allows CO 2 to pass into the plate 12 and mix with the sand as it passes through the orifice. The compressed air is at a pressure of approximately 100 lb/in.<SP>2</SP>, and this is connected to the reduction-valve 27 through a line 38, which valve provides a supply of CO 2 in the reservoir at approximately 80-100 lb/in.<SP>2</SP>. Generally, all the CO 2 is admitted before the mould is fully formed, but some may be admitted after the mould has been formed.
GB3271754A 1954-11-11 1954-11-11 Improvements in or relating to the production of moulds and cores Expired GB780039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3271754A GB780039A (en) 1954-11-11 1954-11-11 Improvements in or relating to the production of moulds and cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3271754A GB780039A (en) 1954-11-11 1954-11-11 Improvements in or relating to the production of moulds and cores

Publications (1)

Publication Number Publication Date
GB780039A true GB780039A (en) 1957-07-31

Family

ID=10342975

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3271754A Expired GB780039A (en) 1954-11-11 1954-11-11 Improvements in or relating to the production of moulds and cores

Country Status (1)

Country Link
GB (1) GB780039A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059294A (en) * 1959-05-04 1962-10-23 Gen Motors Corp Apparatus for making foundry cores and molds
US3253304A (en) * 1961-07-27 1966-05-31 Osborn Mfg Co Mold and core blowing machine and process
EP0259557A1 (en) * 1986-07-14 1988-03-16 ROBERTS SINTO CORPORATION (a Michigan Corporation) Forming apparatus having catalyst introduction simultaneous with sand injection
US4836269A (en) * 1986-07-14 1989-06-06 Roberts Corporation Forming apparatus having catalyst introduction simultaneous with sand injection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059294A (en) * 1959-05-04 1962-10-23 Gen Motors Corp Apparatus for making foundry cores and molds
US3253304A (en) * 1961-07-27 1966-05-31 Osborn Mfg Co Mold and core blowing machine and process
EP0259557A1 (en) * 1986-07-14 1988-03-16 ROBERTS SINTO CORPORATION (a Michigan Corporation) Forming apparatus having catalyst introduction simultaneous with sand injection
US4836269A (en) * 1986-07-14 1989-06-06 Roberts Corporation Forming apparatus having catalyst introduction simultaneous with sand injection

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