GB1200522A - Improvements in or relating to a method for manufacturing articles from compactable materials - Google Patents

Improvements in or relating to a method for manufacturing articles from compactable materials

Info

Publication number
GB1200522A
GB1200522A GB3406168A GB3406168A GB1200522A GB 1200522 A GB1200522 A GB 1200522A GB 3406168 A GB3406168 A GB 3406168A GB 3406168 A GB3406168 A GB 3406168A GB 1200522 A GB1200522 A GB 1200522A
Authority
GB
United Kingdom
Prior art keywords
inserts
plate
mould
filling
ceramic
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
GB3406168A
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.)
Coors Porcelain Co
Original Assignee
Coors Porcelain Co
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 Coors Porcelain Co filed Critical Coors Porcelain Co
Publication of GB1200522A publication Critical patent/GB1200522A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/0068—Embedding lost cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B22F2005/103—Cavity made by removal of insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
    • B29C2043/3652—Elastic moulds or mould parts, e.g. cores or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Ceramic Engineering (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

1,200,522. Isotactic moulding. COORS PORCELAIN CO. 17 July, 1968 [19 July, 1967], No. 34061/68. Addition to 1,093,205. Heading B5A. Ceramic or metal powders, for sintering, are isostatically compressed within a tubular rubber mould 4 to the exterior whereof hydrostatic pressure is applied and within which is non- concentrically located one or more inserts 16 which are free to move with the powder upon the compressing thereof. In the production of a hexagonal section ceramic article incorporating a plurality of parallel cylindrical, triangular or square inserts 16, the inserts 16 are located within rubber mould 4 on pins 14, 10, respectively, provided in a filling cap 8, and in a filling base 6 and mould end plate 12, the cap 8 and plate 12 being provided with locating lugs 18, 20 ensuring correct alignment with the mould 4. The mould 4 is vibrated during filling through cap opening 24 with the powder which may contain organic binder. The filling cap 8 and the base 6 and plate 12, and the associated pins 14, 10, are then removed and replaced by plates 25, 26, or the base 6 may alternatively remain with the plate 12 being replaced by a plate provided with suitable plugs, whereby the inserts 16 are not supported against radial movement upon compression of the powder by oil or water within a pressure chamber 28, or alternatively, with the plates 25, 26 supported against inward axial movement, by complete immersion of the assembly within a pressure tank. The inserts may extend only partially through the article and may also be arranged at an angle to the longitudinal mould axis and may be curved. Instead of the filling cap and plate 8, 12, the inserts may be supported during filling by compressible end caps of plastics foam which may remain and permit movement of the cores during the moulding operation. Articles may be moulded having inserts of non-uniform crosssection containing undercuts, Fig. 6 (not shown). The filling cap 8 may also be of a similar two-part construction to that of the base 6 and plate 12, with the outer part thereof similarly only being replaced for the moulding operation. The inserts may be preformed and fired rods of porous ceramic, or unfired rods of ceramic and organic material providing a desired porosity upon subsequent firing. The ceramic inserts may also comprise a conductive mixture of alumina and iron oxide moulded into non-conductive alumina.
GB3406168A 1965-02-23 1968-07-17 Improvements in or relating to a method for manufacturing articles from compactable materials Expired GB1200522A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43438065A 1965-02-23 1965-02-23
US66055067A 1967-07-19 1967-07-19

Publications (1)

Publication Number Publication Date
GB1200522A true GB1200522A (en) 1970-07-29

Family

ID=27030163

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3406168A Expired GB1200522A (en) 1965-02-23 1968-07-17 Improvements in or relating to a method for manufacturing articles from compactable materials

Country Status (1)

Country Link
GB (1) GB1200522A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202218A (en) * 1987-02-19 1988-09-21 De Beers Ind Diamond Method of making an article from pyrophyllite
EP1377423A1 (en) * 2000-09-22 2004-01-07 Praxair Technology, Inc. Cold isopressing method and mold

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202218A (en) * 1987-02-19 1988-09-21 De Beers Ind Diamond Method of making an article from pyrophyllite
GB2202218B (en) * 1987-02-19 1991-02-06 De Beers Ind Diamond Method of making an article from pyrophyllite
EP1377423A1 (en) * 2000-09-22 2004-01-07 Praxair Technology, Inc. Cold isopressing method and mold
EP1377423A4 (en) * 2000-09-22 2004-03-31 Praxair Technology Inc Cold isopressing method and mold

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees