FR2279535A1 - Moulding thin walled containers by intrusion and injection - increasing shot volume by fifty to sixty percent - Google Patents

Moulding thin walled containers by intrusion and injection - increasing shot volume by fifty to sixty percent

Info

Publication number
FR2279535A1
FR2279535A1 FR7523274A FR7523274A FR2279535A1 FR 2279535 A1 FR2279535 A1 FR 2279535A1 FR 7523274 A FR7523274 A FR 7523274A FR 7523274 A FR7523274 A FR 7523274A FR 2279535 A1 FR2279535 A1 FR 2279535A1
Authority
FR
France
Prior art keywords
volume
articles
injection
mould
thermoplastic
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.)
Granted
Application number
FR7523274A
Other languages
French (fr)
Other versions
FR2279535B3 (en
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.)
LEADER MACHINERY
Original Assignee
LEADER MACHINERY
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
Priority claimed from GB33147/74A external-priority patent/GB1513375A/en
Application filed by LEADER MACHINERY filed Critical LEADER MACHINERY
Publication of FR2279535A1 publication Critical patent/FR2279535A1/en
Application granted granted Critical
Publication of FR2279535B3 publication Critical patent/FR2279535B3/fr
Granted 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
    • B29C44/02—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
    • B29C45/16—Making multilayered or multicoloured articles
    • 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
    • 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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5833—Measuring, controlling or regulating movement of moulds or mould parts, e.g. opening or closing, actuating
    • B29C2043/5841—Measuring, controlling or regulating movement of moulds or mould parts, e.g. opening or closing, actuating for accommodating variation in mould spacing or cavity volume during moulding
    • 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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • B29C2045/565—Closing of the mould during injection
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—Wall thickness
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/42—Moulds for making articles of definite length, i.e. discrete articles for undercut articles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous

Landscapes

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

Abstract

Articles of high and low density polyethylene, etc., are produced on injection moulders with single or dual plasticising cylinders and nozzles, by a technique incorporating the following steps- 1) a mass of thermoplastic material is introduced into an extended mould cavity having a larger volume than that of the product, 2) a further quantity of thermoplastic material is fed in, 3) either before, at the start of or during the feeding of the second thermoplastic material, the volume of the moulding cavity is reduced to correspond to the dimensions of the finished article, and 4) a further mass of the first thermoplastic is injected so as to fill the mould inlet funnel. In the first step, the material is intruded with the plasticising screw held at a predetermined point. In the second the material is injected into the mould. The first material may form the skin whilst the second forms the core of a composite product. Makes it possible to produce articles with good surface characteristics, with the thinnest possible walls, e.g. 2 to 4mm, and with a flow/wall thickness ratio of >=30. The products have a volume, normally 50-60% more than the nominal size of the shot. With articles of a suitable profile and the right material, the excess may be raised to 100%.
FR7523274A 1974-07-26 1975-07-25 Moulding thin walled containers by intrusion and injection - increasing shot volume by fifty to sixty percent Granted FR2279535A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB33147/74A GB1513375A (en) 1974-07-26 1974-07-26 Moulding process
GB3344074 1974-07-29
GB4763474 1974-11-04
GB1267575 1975-03-26

Publications (2)

Publication Number Publication Date
FR2279535A1 true FR2279535A1 (en) 1976-02-20
FR2279535B3 FR2279535B3 (en) 1977-08-19

Family

ID=27448157

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7523274A Granted FR2279535A1 (en) 1974-07-26 1975-07-25 Moulding thin walled containers by intrusion and injection - increasing shot volume by fifty to sixty percent

Country Status (2)

Country Link
DE (1) DE2533338B2 (en)
FR (1) FR2279535A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282885A2 (en) * 1987-03-19 1988-09-21 BASF Aktiengesellschaft Method and apparatus for producing moulded foam articles having a solidified outer skin
EP0755763A1 (en) * 1994-03-28 1997-01-29 Sumitomo Chemical Company Limited Method of manufacturing multi-layered moldings

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011052015A1 (en) * 2010-11-26 2012-05-31 Reluma Gmbh Intrusion method for producing e.g. lamp posts, involves determining required amount of polyethylene and required portion of plastic molding mass to be mixed into another molding mass, and mixing portion of former mass with latter mass
DE102013015800A1 (en) * 2013-09-24 2015-03-26 Wittmann Battenfeld Gmbh injection molding machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282885A2 (en) * 1987-03-19 1988-09-21 BASF Aktiengesellschaft Method and apparatus for producing moulded foam articles having a solidified outer skin
EP0282885A3 (en) * 1987-03-19 1991-08-28 BASF Aktiengesellschaft Method and apparatus for producing moulded foam articles having a solidified outer skin
EP0755763A1 (en) * 1994-03-28 1997-01-29 Sumitomo Chemical Company Limited Method of manufacturing multi-layered moldings
EP0755763A4 (en) * 1994-03-28 1998-07-29 Sumitomo Chemical Co Method of manufacturing multi-layered moldings
US6231798B1 (en) 1994-03-28 2001-05-15 Sumitomo Chemical Company, Ltd. Process for producing multi-layer molded product

Also Published As

Publication number Publication date
FR2279535B3 (en) 1977-08-19
DE2533338A1 (en) 1976-02-05
DE2533338B2 (en) 1979-09-20

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