GB1418034A - Moulding process - Google Patents

Moulding process

Info

Publication number
GB1418034A
GB1418034A GB5461972A GB5461972A GB1418034A GB 1418034 A GB1418034 A GB 1418034A GB 5461972 A GB5461972 A GB 5461972A GB 5461972 A GB5461972 A GB 5461972A GB 1418034 A GB1418034 A GB 1418034A
Authority
GB
United Kingdom
Prior art keywords
injection
moulding process
moulding
nov
foamed
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
GB5461972A
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.)
Demag Kunststofftechnik Zweigniederlassung der Demag AG
Original Assignee
Demag Kunststofftechnik Zweigniederlassung der Demag 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 Demag Kunststofftechnik Zweigniederlassung der Demag AG filed Critical Demag Kunststofftechnik Zweigniederlassung der Demag AG
Publication of GB1418034A publication Critical patent/GB1418034A/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
    • 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

1418034 Injection moulding DEMAG KUNSTSTOFFTECHNIK GmbH 27 Nov 1972 [29 Nov 1971] 54619/72 Heading B5A In an injection moulding process using a plurality of injection units connected to a common valved nozzle the injection of one component is commenced before the injection of the preceding component has finished. The invention may be applied to the so-called "sandwich" moulding using a foamed or non-foamed core material.
GB5461972A 1971-11-29 1972-11-27 Moulding process Expired GB1418034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712159089 DE2159089A1 (en) 1971-11-29 1971-11-29 PROCESS FOR PRODUCING MOLDED PARTS FROM MULTIPLE PLASTICS ON INJECTION MOLDING MACHINES

Publications (1)

Publication Number Publication Date
GB1418034A true GB1418034A (en) 1975-12-17

Family

ID=5826453

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5461972A Expired GB1418034A (en) 1971-11-29 1972-11-27 Moulding process

Country Status (9)

Country Link
JP (1) JPS4864143A (en)
AT (1) AT325843B (en)
BR (1) BR7208215D0 (en)
CH (1) CH538929A (en)
DE (1) DE2159089A1 (en)
FR (1) FR2162014B1 (en)
GB (1) GB1418034A (en)
IT (1) IT972265B (en)
NL (1) NL7216169A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735099A1 (en) * 1987-10-16 1989-04-27 Battenfeld Gmbh METHOD AND DEVICE FOR PRODUCING MULTILAYER MOLDED PARTS

Also Published As

Publication number Publication date
AT325843B (en) 1975-11-10
FR2162014B1 (en) 1975-05-30
BR7208215D0 (en) 1973-08-30
IT972265B (en) 1974-05-20
DE2159089A1 (en) 1973-05-30
FR2162014A1 (en) 1973-07-13
ATA965472A (en) 1975-01-15
JPS4864143A (en) 1973-09-05
CH538929A (en) 1973-07-15
NL7216169A (en) 1973-06-01

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414E Application relinquished (sect. 14/1949)
CSNS Application of which complete specification have been accepted and published, but patent is not sealed