FR2372009A1 - Prodn. of model for forming hollow moulds - by coating model with thin silicon layer, thick layer of silicon and HF sensitive material and filling with silicon and aluminium - Google Patents

Prodn. of model for forming hollow moulds - by coating model with thin silicon layer, thick layer of silicon and HF sensitive material and filling with silicon and aluminium

Info

Publication number
FR2372009A1
FR2372009A1 FR7635532A FR7635532A FR2372009A1 FR 2372009 A1 FR2372009 A1 FR 2372009A1 FR 7635532 A FR7635532 A FR 7635532A FR 7635532 A FR7635532 A FR 7635532A FR 2372009 A1 FR2372009 A1 FR 2372009A1
Authority
FR
France
Prior art keywords
silicon
layer
moulds
model
coating
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.)
Granted
Application number
FR7635532A
Other languages
French (fr)
Other versions
FR2372009B3 (en
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.)
SUCHET ALFORT STE IMMOB FINANC
Original Assignee
SUCHET ALFORT STE IMMOB FINANC
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 SUCHET ALFORT STE IMMOB FINANC filed Critical SUCHET ALFORT STE IMMOB FINANC
Priority to FR7635532A priority Critical patent/FR2372009A1/en
Publication of FR2372009A1 publication Critical patent/FR2372009A1/en
Application granted granted Critical
Publication of FR2372009B3 publication Critical patent/FR2372009B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/40—Plastics, e.g. foam or rubber
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0011—Moulds or cores; Details thereof or accessories therefor thin-walled moulds
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/08—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means for dielectric heating
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2883/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as mould material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0006—Dielectric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/50—Footwear, e.g. shoes or parts thereof
    • B29L2031/505—Uppers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Cavity moulds for compression moulding plastics materials fused by high frequency (HF) dielectric loss heating are made by coating a pattern a) with a thin (0.4-0.7 mm thick) layer of silicone resin deposited from solution (by e.g. spraying), covered with b) a thicker (1-3mm) layer of silicone resin extended with a material (such as polyvinyl acetate, PVC or epoxy resin) having a higher HF loss factor. The second coating compsns should be non-melting up to 200 degrees C. The bulk of the mould body is then cast using a conventional silicone resin/aluminium powder blend. Used esp. for moulds for shaping thin layers (1mm) of material such as flexible PVC coatings on supports for shoe uppers or other artificial leather work. Complementary heat generation at the cavity surface reduces mould cycle times, esp. when gelling thin layers of material relatively susceptible to heat loss to moulds or mould coatings not warmed up by the HF heating. Alternatively allows larger (>1200 cm2) mouldings to be formed using conventionally sized 15-20 kVA generators.
FR7635532A 1976-11-25 1976-11-25 Prodn. of model for forming hollow moulds - by coating model with thin silicon layer, thick layer of silicon and HF sensitive material and filling with silicon and aluminium Granted FR2372009A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7635532A FR2372009A1 (en) 1976-11-25 1976-11-25 Prodn. of model for forming hollow moulds - by coating model with thin silicon layer, thick layer of silicon and HF sensitive material and filling with silicon and aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7635532A FR2372009A1 (en) 1976-11-25 1976-11-25 Prodn. of model for forming hollow moulds - by coating model with thin silicon layer, thick layer of silicon and HF sensitive material and filling with silicon and aluminium

Publications (2)

Publication Number Publication Date
FR2372009A1 true FR2372009A1 (en) 1978-06-23
FR2372009B3 FR2372009B3 (en) 1980-10-10

Family

ID=9180306

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7635532A Granted FR2372009A1 (en) 1976-11-25 1976-11-25 Prodn. of model for forming hollow moulds - by coating model with thin silicon layer, thick layer of silicon and HF sensitive material and filling with silicon and aluminium

Country Status (1)

Country Link
FR (1) FR2372009A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011538A1 (en) * 1978-11-16 1980-05-28 Societe Immobiliere Et Financiere Suchet-Alfort (S.I.F.S.A.) Mould for producing plastics articles by high-frequency heating and method of making the same
US4952355A (en) * 1988-09-12 1990-08-28 Seward Thomas J Method for making a plastic tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011538A1 (en) * 1978-11-16 1980-05-28 Societe Immobiliere Et Financiere Suchet-Alfort (S.I.F.S.A.) Mould for producing plastics articles by high-frequency heating and method of making the same
US4952355A (en) * 1988-09-12 1990-08-28 Seward Thomas J Method for making a plastic tool

Also Published As

Publication number Publication date
FR2372009B3 (en) 1980-10-10

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Legal Events

Date Code Title Description
ST Notification of lapse