GB1304990A - Moulds for moulding non-ferrous metals and alloys - Google Patents

Moulds for moulding non-ferrous metals and alloys

Info

Publication number
GB1304990A
GB1304990A GB3449271A GB3449271A GB1304990A GB 1304990 A GB1304990 A GB 1304990A GB 3449271 A GB3449271 A GB 3449271A GB 3449271 A GB3449271 A GB 3449271A GB 1304990 A GB1304990 A GB 1304990A
Authority
GB
United Kingdom
Prior art keywords
per cent
sheets
viscosity
disc
july
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
GB3449271A
Inventor
Henri Daudin
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.)
Rhone Poulenc SA
Original Assignee
Rhone Poulenc SA
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 Rhone Poulenc SA filed Critical Rhone Poulenc SA
Publication of GB1304990A publication Critical patent/GB1304990A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B22D13/101—Moulds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica

Abstract

1304990 Foundry moulds RHONE-POULENC SA 22 July 1971 [22 July 1970] 34492/71 Heading B3F [Also in Division C3] A flexible mould for casting metals is made of a vulcanized elastomer having a Shore hardness between 30 and 60, a tensile strength of 40-90 kg./cm.<SP>2</SP> and elongation at break of 200-600%, obtained from a composition comprising (i) a polydiorganosiloxane in which the organo groups are methyl, phenyl or vinyl radicals and there is on average one vinyl radical per 250- 1000 Si atoms, of viscosity 20,000-30,000,000 cp./25‹ C., (ii) an anti-structure agent, (iii) 20-50 wt. per cent of silica, relative to (i), and (iv) 0À1-10 wt. per cent of a heat resistance adjuvant. In the example a composition comprising (i) a trimethylsiloxy-terminated polydimethylsiloxane containing 0À23 wt. per cent methylvinylsiloxane units, of viscosity 25 Î 10<SP>6</SP> cp./25‹ C., (ii) a polydimethylsiloxane diol, of viscosity 40 cp./25‹ C., containing 13 wt. per cent OH groups, (iii) a pyrogenic silica treated with [Me 2 SiO] 4 and (iv) Fe and Mn octoates, is mixed with 2 : 4-dichlorobenzoyl peroxide paste (in silicone oil), and formed into disc-shaped sheets. The disc-shaped sheets are rubbed with talc to render them non-tacky and a pattern of 3 buckles is placed between a pair of sheets, a pouring orifice being provided at the centre of one disc. The sheets are vulcanized in a press at 70 bars pressure at 160‹ C. for 30 mins. then heated for 4 hours at 150‹ C. and 8 hours at 200‹ C. After cooling, runners are cut in the mould and zinc-aluminium-magnesium alloy melting at 435‹ C. may be centrifugally cast therein.
GB3449271A 1970-07-22 1971-07-22 Moulds for moulding non-ferrous metals and alloys Expired GB1304990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7027039A FR2098629A5 (en) 1970-07-22 1970-07-22 MOLDS FOR MOLDING NON-FERROUS METALS AND ALLOYS

Publications (1)

Publication Number Publication Date
GB1304990A true GB1304990A (en) 1973-01-31

Family

ID=9059050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3449271A Expired GB1304990A (en) 1970-07-22 1971-07-22 Moulds for moulding non-ferrous metals and alloys

Country Status (3)

Country Link
BE (1) BE770289A (en)
FR (1) FR2098629A5 (en)
GB (1) GB1304990A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726412A (en) * 1984-11-07 1988-02-23 Rhone-Poulenc Specialites Chimiques Production of high melting point metallic molds
EP3511145A4 (en) * 2016-09-06 2020-04-08 Comercial Nicem-Exinte, S.A. - Coniex Device for injecting low-melting-point alloys or metals into an elastomer polymer mould, elastomer polymer mould used and method for operating the assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726412A (en) * 1984-11-07 1988-02-23 Rhone-Poulenc Specialites Chimiques Production of high melting point metallic molds
EP3511145A4 (en) * 2016-09-06 2020-04-08 Comercial Nicem-Exinte, S.A. - Coniex Device for injecting low-melting-point alloys or metals into an elastomer polymer mould, elastomer polymer mould used and method for operating the assembly

Also Published As

Publication number Publication date
BE770289A (en) 1972-01-20
FR2098629A5 (en) 1972-03-10

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414B Case decided by the comptroller ** grants allowed (sect. 14/1949)
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee