GB1441347A - Method for manufacturing two-layer moulded articles of thermo- plastic synthetic material - Google Patents

Method for manufacturing two-layer moulded articles of thermo- plastic synthetic material

Info

Publication number
GB1441347A
GB1441347A GB3452474A GB3452474A GB1441347A GB 1441347 A GB1441347 A GB 1441347A GB 3452474 A GB3452474 A GB 3452474A GB 3452474 A GB3452474 A GB 3452474A GB 1441347 A GB1441347 A GB 1441347A
Authority
GB
United Kingdom
Prior art keywords
injected
unfoamed
layer
channel
synthetic material
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
GB3452474A
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 GB1441347A publication Critical patent/GB1441347A/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
    • B29C45/164—The moulding materials being injected simultaneously
    • 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

Landscapes

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

Abstract

1441347 Injection moulding SCHLOEMANN-SIEMAG AG 6 Aug 1974 [25 Aug 1973] 34524/74 Heading B5A In a method of making two-layer moulded articles, unfoamed synthetic material and synthetic material containing a blowing agent are injected simultaneously through separate injection passages one of which surrounds the other. In one example (Fig. 1) a sleeve 5 and nozzle needle 6 are withdrawn from the position shown so that foamable material is injected through a channel 8 and annular space 8 into a mould 3 at slightly lower speed than unfoamed material is being injected through a channel 11 and an annular space 9. The two materials may be injected at the same speed and at equal or different volumetric rates. The moulded article comprises a foamed core (13) and an unfoamed skin (12) at the side of the mould opposite the sprue channel 2. In another example (Figs. 5-8, not shown) the non-foamable material is injected through the annular passage and the foamable material is injected through the central passage. In this case the moulded article has a layer of unfoamed material adjacent the sprue channel and this layer may be completed by injecting further unfoamable material after stopping the flow of foamable material.
GB3452474A 1973-08-25 1974-08-06 Method for manufacturing two-layer moulded articles of thermo- plastic synthetic material Expired GB1441347A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732342957 DE2342957A1 (en) 1973-08-25 1973-08-25 PROCESS FOR THE DISCONTINUOUS MANUFACTURING OF MULTI-LAYER MOLDED PARTS FROM THERMOPLASTIC PLASTIC

Publications (1)

Publication Number Publication Date
GB1441347A true GB1441347A (en) 1976-06-30

Family

ID=5890693

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3452474A Expired GB1441347A (en) 1973-08-25 1974-08-06 Method for manufacturing two-layer moulded articles of thermo- plastic synthetic material

Country Status (8)

Country Link
JP (1) JPS5051166A (en)
CH (1) CH573301A5 (en)
DD (1) DD114032A5 (en)
DE (1) DE2342957A1 (en)
FR (1) FR2241397B3 (en)
GB (1) GB1441347A (en)
IT (1) IT1020072B (en)
SE (1) SE7410701L (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116902A (en) * 1982-03-15 1983-10-05 William Chester Witkowski Injection moulding plastics articles
EP1013386A1 (en) * 1998-12-22 2000-06-28 ELMA Chemicals S.r.l. Method and device for manufacturing products by utilizing waste materials of various kind, and product obtained therewith
US8753102B2 (en) 2010-09-21 2014-06-17 Mold-Masters (2007) Limited Coinjection hot runner injection molding system
US9073246B2 (en) 2011-09-21 2015-07-07 Mold-Masters (2007) Limited Coinjection hot runner injection molding system
US9498911B2 (en) 2010-09-21 2016-11-22 Mold-Masters (2007) Limited Coinjection hot runner injection molding system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174413A (en) * 1976-07-27 1979-11-13 Asahi-Dow Limited Multi-layered molded articles
DE3437553A1 (en) * 1983-10-14 1985-04-25 Rogers Corp., Rogers, Conn. Component for document feeding and process for the production thereof
DE3513863A1 (en) * 1985-04-17 1986-10-23 Dr. Alois Stankiewicz GmbH, 3101 Adelheidsdorf ACOUSTICALLY EFFECTIVE MATERIAL STRUCTURE
US7527490B2 (en) 2006-10-13 2009-05-05 Mold-Masters (2007) Limited Coinjection molding apparatus and related hot-runner nozzle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116902A (en) * 1982-03-15 1983-10-05 William Chester Witkowski Injection moulding plastics articles
EP1013386A1 (en) * 1998-12-22 2000-06-28 ELMA Chemicals S.r.l. Method and device for manufacturing products by utilizing waste materials of various kind, and product obtained therewith
NL1013868C2 (en) * 1998-12-22 2005-01-05 Elma Chemicals S R L Method and device for the manufacture of products by using waste materials of various kinds, as well as product obtained with the method.
US8753102B2 (en) 2010-09-21 2014-06-17 Mold-Masters (2007) Limited Coinjection hot runner injection molding system
US9498911B2 (en) 2010-09-21 2016-11-22 Mold-Masters (2007) Limited Coinjection hot runner injection molding system
US9073246B2 (en) 2011-09-21 2015-07-07 Mold-Masters (2007) Limited Coinjection hot runner injection molding system

Also Published As

Publication number Publication date
DE2342957A1 (en) 1975-03-13
JPS5051166A (en) 1975-05-07
CH573301A5 (en) 1976-03-15
IT1020072B (en) 1977-12-20
FR2241397A1 (en) 1975-03-21
FR2241397B3 (en) 1977-06-17
SE7410701L (en) 1975-02-26
DD114032A5 (en) 1975-07-12

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed