FR2047967A1 - Injection moulding foamed plastic bodies - Google Patents

Injection moulding foamed plastic bodies

Info

Publication number
FR2047967A1
FR2047967A1 FR7023858A FR7023858A FR2047967A1 FR 2047967 A1 FR2047967 A1 FR 2047967A1 FR 7023858 A FR7023858 A FR 7023858A FR 7023858 A FR7023858 A FR 7023858A FR 2047967 A1 FR2047967 A1 FR 2047967A1
Authority
FR
France
Prior art keywords
temp
injection moulding
foamed plastic
transfer cylinder
plastic bodies
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.)
Withdrawn
Application number
FR7023858A
Other languages
French (fr)
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.)
Siemag Siegener Maschinenbau GmbH
Original Assignee
Siemag Siegener Maschinenbau GmbH
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 Siemag Siegener Maschinenbau GmbH filed Critical Siemag Siegener Maschinenbau GmbH
Publication of FR2047967A1 publication Critical patent/FR2047967A1/en
Withdrawn legal-status Critical Current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
    • 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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • B29C44/421—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum by plastizising the material into a shot cavity and injecting using a plunger
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
    • 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
    • B29C45/72—Heating or cooling
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices

Abstract

Foamed thermoplastic bodies are produced by a process which avoids gas leaks as well as critical adjustments to the temp. gradient along the extruder axis. The thermoplastic material to which the foaming agent has been added is plasticised below the reaction temp. of the agent and is fed continuously to a transfer cylinder. It is then sprayed from the transfer cylinder into the mould at a temp. above the reaction temp. The increase in temp. is effected in the transfer conduit between the plasticising device and the transfer cylinder.
FR7023858A 1969-06-26 1970-06-26 Injection moulding foamed plastic bodies Withdrawn FR2047967A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691932437 DE1932437A1 (en) 1969-06-26 1969-06-26 Method and device for the production of plastic foam bodies in injection molds

Publications (1)

Publication Number Publication Date
FR2047967A1 true FR2047967A1 (en) 1971-03-19

Family

ID=5738080

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7023858A Withdrawn FR2047967A1 (en) 1969-06-26 1970-06-26 Injection moulding foamed plastic bodies

Country Status (2)

Country Link
DE (1) DE1932437A1 (en)
FR (1) FR2047967A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2190595A1 (en) * 1972-06-27 1974-02-01 Erlhoff Herbert Injection moulding head - i which melt is fed to injection nozzle from seve-ral ducts in which feed screws are located

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW259748B (en) * 1994-03-18 1995-10-11 Nissei Zyushi Kogyo Kk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2190595A1 (en) * 1972-06-27 1974-02-01 Erlhoff Herbert Injection moulding head - i which melt is fed to injection nozzle from seve-ral ducts in which feed screws are located

Also Published As

Publication number Publication date
DE1932437A1 (en) 1971-01-07

Similar Documents

Publication Publication Date Title
FR1350565A (en) Process and mold for molding plastic foams
GB1408829A (en) Structural foam article and process therefor
ES348184A1 (en) Method for the manufacture of pvc bottles
GB1043040A (en) Process for the production of foam plastics from polycondensates
GB1305224A (en)
FR2047967A1 (en) Injection moulding foamed plastic bodies
FR1602792A (en) Combined extrusion and injection moulding equipment for
GB1317439A (en) Moulding apparatus
JPS56133142A (en) Manufacture of mold for molding plastic foaming product
ES438075A1 (en) Method and apparatus for manufacturing a hollow plastics article
FR2021652A1 (en) Injection moulding of porous articles
JPS51134752A (en) Method of extrusion molding resin molded article with different thicknesses
FR1335219A (en) Process for the production of shaped articles by compression molding of plastics
GB1226129A (en)
GB795158A (en) Improvements in the production of large shaped articles from thermoplastic plastics by injection pressing
ES377540A1 (en) Injection moulding apparatus with dynamic impact injection assist means and control therefor
GB974263A (en) A process and an apparatus for the manufacture of moulded articles from synthetic thermoplastic materials containing blowing agents
FR2121409A1 (en) Expanded plastic mouldings - formed by expansion before injection
NL7002188A (en) Blow moulded plastic containers prodn
GB1182104A (en) Production of Moulded Articles from Polyurethane
BE786847Q (en) Injection mould of foam plastics
ES295270A1 (en) A procedure for the manufacture of bottles of plastic material by extrusion and insufficient (Machine-translation by Google Translate, not legally binding)
GB1409418A (en) Method of manufacturing moulded cellular plastics articles
FR2039908A5 (en) Explosion assisted injection moulding of - plastics
GB964688A (en) Improvements in the manufacture of orthopaedic foot supports

Legal Events

Date Code Title Description
ST Notification of lapse