SE7410701L - - Google Patents

Info

Publication number
SE7410701L
SE7410701L SE7410701A SE7410701A SE7410701L SE 7410701 L SE7410701 L SE 7410701L SE 7410701 A SE7410701 A SE 7410701A SE 7410701 A SE7410701 A SE 7410701A SE 7410701 L SE7410701 L SE 7410701L
Authority
SE
Sweden
Prior art keywords
injected
unfoamed
channel
layer
foamable material
Prior art date
Application number
SE7410701A
Other languages
Unknown language ( )
Inventor
W Fillmann
H Eckardt
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 SE7410701L publication Critical patent/SE7410701L/

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.
SE7410701A 1973-08-25 1974-08-23 SE7410701L (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
SE7410701L true SE7410701L (en) 1975-02-26

Family

ID=5890693

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7410701A SE7410701L (en) 1973-08-25 1974-08-23

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)

Families Citing this family (9)

* 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
US4457511A (en) * 1982-03-15 1984-07-03 William Witkowski Plastic bowling pin and method of making the same
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
IT1303387B1 (en) * 1998-12-22 2000-11-06 Elma Chemicals S R L PROCESS AND DEVICE FOR THE MANUFACTURE OF PRODUCTS USING WASTE MATERIALS OF VARIOUS KINDS, AND THE PRODUCT SO OBTAINED.
US7527490B2 (en) 2006-10-13 2009-05-05 Mold-Masters (2007) Limited Coinjection molding apparatus and related hot-runner nozzle
CA2811247C (en) 2010-09-21 2018-01-02 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
JPS5051166A (en) 1975-05-07
GB1441347A (en) 1976-06-30
DE2342957A1 (en) 1975-03-13
FR2241397B3 (en) 1977-06-17
CH573301A5 (en) 1976-03-15
DD114032A5 (en) 1975-07-12
FR2241397A1 (en) 1975-03-21
IT1020072B (en) 1977-12-20

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