IT1021486B - PROCEDURE AND PLANT FOR THE PREPARATION OF PLASTIC BODIES CONSISTING OF A LAYER OF EXTERNAL COATING MATERIAL AND OF A CORE OF INTERNAL MATERIAL - Google Patents

PROCEDURE AND PLANT FOR THE PREPARATION OF PLASTIC BODIES CONSISTING OF A LAYER OF EXTERNAL COATING MATERIAL AND OF A CORE OF INTERNAL MATERIAL

Info

Publication number
IT1021486B
IT1021486B IT2741374A IT2741374A IT1021486B IT 1021486 B IT1021486 B IT 1021486B IT 2741374 A IT2741374 A IT 2741374A IT 2741374 A IT2741374 A IT 2741374A IT 1021486 B IT1021486 B IT 1021486B
Authority
IT
Italy
Prior art keywords
plant
core
procedure
preparation
layer
Prior art date
Application number
IT2741374A
Other languages
Italian (it)
Original Assignee
Lo Sfruttamento Di Brevetti 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
Priority claimed from CH1347973A external-priority patent/CH570258A5/en
Priority claimed from CH233474A external-priority patent/CH575284A5/en
Priority claimed from CH581274A external-priority patent/CH576856A5/en
Application filed by Lo Sfruttamento Di Brevetti Sa filed Critical Lo Sfruttamento Di Brevetti Sa
Application granted granted Critical
Publication of IT1021486B publication Critical patent/IT1021486B/en

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0492—Devices for feeding the different materials
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Molding Of Porous Articles (AREA)
IT2741374A 1973-09-19 1974-09-18 PROCEDURE AND PLANT FOR THE PREPARATION OF PLASTIC BODIES CONSISTING OF A LAYER OF EXTERNAL COATING MATERIAL AND OF A CORE OF INTERNAL MATERIAL IT1021486B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1347973A CH570258A5 (en) 1973-09-19 1973-09-19 Foam core articles with outer skin - are injection moulded with large bubbles in core produced by gas
CH233474A CH575284A5 (en) 1974-02-20 1974-02-20 Foamed plastics injection moulded articles - with skin and core latter of which is formed by inhibiting foaming before injection nozzle
CH581274A CH576856A5 (en) 1974-04-29 1974-04-29 Foamed plastics injection moulded articles - with skin and core latter of which is formed by inhibiting foaming before injection nozzle

Publications (1)

Publication Number Publication Date
IT1021486B true IT1021486B (en) 1978-01-30

Family

ID=27173631

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2741374A IT1021486B (en) 1973-09-19 1974-09-18 PROCEDURE AND PLANT FOR THE PREPARATION OF PLASTIC BODIES CONSISTING OF A LAYER OF EXTERNAL COATING MATERIAL AND OF A CORE OF INTERNAL MATERIAL

Country Status (6)

Country Link
JP (3) JPS5094078A (en)
BR (1) BR7407799A (en)
CA (1) CA1037665A (en)
FR (1) FR2243799B1 (en)
GB (1) GB1459882A (en)
IT (1) IT1021486B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798799A (en) * 1980-12-10 1982-06-19 Mitsubishi Heavy Ind Ltd Chemical cleaning method for combined boiler
US4457511A (en) * 1982-03-15 1984-07-03 William Witkowski Plastic bowling pin and method of making the same
JPS5960103A (en) * 1982-09-29 1984-04-06 バブコツク日立株式会社 Boiler device
JP2010036563A (en) * 2008-08-08 2010-02-18 Kasai Kogyo Co Ltd Resin molded article and molding method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH566207A5 (en) * 1972-12-07 1975-09-15 Siemag Siegener Masch Bau

Also Published As

Publication number Publication date
GB1459882A (en) 1976-12-31
JPS5415968A (en) 1979-02-06
JPS5415969A (en) 1979-02-06
FR2243799B1 (en) 1978-12-29
BR7407799A (en) 1975-10-14
CA1037665A (en) 1978-09-05
FR2243799A1 (en) 1975-04-11
JPS5094078A (en) 1975-07-26

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