GB1501747A - Process and apparatus for moulding articles - Google Patents

Process and apparatus for moulding articles

Info

Publication number
GB1501747A
GB1501747A GB4242475A GB4242475A GB1501747A GB 1501747 A GB1501747 A GB 1501747A GB 4242475 A GB4242475 A GB 4242475A GB 4242475 A GB4242475 A GB 4242475A GB 1501747 A GB1501747 A GB 1501747A
Authority
GB
United Kingdom
Prior art keywords
cylinder
sleeve
injection
nozzle
skin
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
GB4242475A
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.)
SMS Siemag AG
Original Assignee
Schloemann Siemag AG
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 Schloemann Siemag AG filed Critical Schloemann Siemag AG
Publication of GB1501747A publication Critical patent/GB1501747A/en
Expired 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
    • 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
    • B29C44/0461—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 by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
    • 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
    • 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
    • B29C45/1603—Multi-way nozzles specially adapted therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

1501747 Injection moulding integral skin foam articles SCHLOEMANN-SIEMAG AG 16 Oct 1975 [19 Oct 1974] 42424/75 Heading B5A Integral skin foam articles are injection moulded by injecting unfoamed material containing blowing agent into a closed mould to fill the mould cavity, causing or allowing an unfoamed skin to form, transferring a portion of the material within the skin to a storage chamber to thereby allow the transferred material and the remaining core material to foam, compacting the transferred material in the storage chamber, and in the next cycle injecting the compacted material with a further charge of unfoamed material so that the compacted material is completely encased by the fresh material. Plasticized material is fed past a non-return valve 3 into an injection cylinder 1 from which it is injected by a ram 4 through an outer nozzle 12. A control member 11 in the nozzle 12 contains a sleeve 14 which is slidable to close the nozzle after injection by means of cylinder 16 acting through a transverse slide 15. A cranked rod 18 is moved within the slide 15 by a cylinder 19 to retract a closure needle 17 within the sleeve 14 after formation of the skin to allow material to flow out through the sleeve into storage chamber 24. A piston 25 is displaced by the incoming material against a fluid pressure in a second chamber 28. After closing the sleeve 14 the piston 25 is used to compact the material in the chamber 24 ready for injection simultaneously with the material from cylinder 1 in the next cycle, the sleeve 14 acting as an inner nozzle to confine the compacted material within the fresh material. Alternatively the compacted material may be injected between two injection stages of the fresh material. In another embodiment (Fig. 6, not shown) an injection cylinder (1a) and a storage cylinder (23a) are arranged in parallel on either side of the nozzle axis, and the end of the sleeve is connected directly to a coaxial operating cylinder (16a).
GB4242475A 1974-10-19 1975-10-16 Process and apparatus for moulding articles Expired GB1501747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742449758 DE2449758A1 (en) 1974-10-19 1974-10-19 METHOD AND DEVICE FOR MANUFACTURING PLASTIC MOLDED PARTS WITH A FOAMED CORE AND AN UNFOAMED OUTER SKIN

Publications (1)

Publication Number Publication Date
GB1501747A true GB1501747A (en) 1978-02-22

Family

ID=5928674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4242475A Expired GB1501747A (en) 1974-10-19 1975-10-16 Process and apparatus for moulding articles

Country Status (3)

Country Link
JP (1) JPS5165175A (en)
DE (1) DE2449758A1 (en)
GB (1) GB1501747A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132932A (en) * 1983-01-03 1984-07-18 Hoover Universal Injection moulding plastic articles having solid exterior surfaces and porous interior cores

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190409A (en) * 1977-10-14 1980-02-26 Karl Hehl Apparatus for injecting confluent streams of plastic
DE3025597C2 (en) * 1980-07-05 1984-06-14 Battenfeld Maschinenfabriken Gmbh, 5882 Meinerzhagen Injection head for injection molding of multi-layer molded parts made of two different plastics that can be introduced from two separate injection cylinders
JPS5967029A (en) * 1982-10-08 1984-04-16 Meiki Co Ltd Multilayer injection molding device
US4657496A (en) * 1984-06-04 1987-04-14 Gifu Husky Co., Ltd. Hot-runner mold for injection molding
DE3632185A1 (en) * 1986-09-23 1988-03-31 Battenfeld Maschfab DEVICE FOR PRODUCING PLASTIC MOLDED BODIES
DE3912426A1 (en) * 1989-04-12 1990-10-18 Mannesmann Ag METHOD AND DEVICE FOR PRODUCING MULTI-COMPONENT INJECTION MOLDING PARTS
DE4340990C2 (en) * 1993-11-05 1996-09-19 Battenfeld Gmbh Method and device for injection molding multi-layer objects
DE19640662C1 (en) * 1996-10-02 1998-03-05 Krupp Ag Hoesch Krupp Injection moulding of bottle preforms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132932A (en) * 1983-01-03 1984-07-18 Hoover Universal Injection moulding plastic articles having solid exterior surfaces and porous interior cores

Also Published As

Publication number Publication date
JPS5165175A (en) 1976-06-05
DE2449758A1 (en) 1976-04-29

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee