ES380370A1 - Method of forming foamed seal liners in container closures - Google Patents

Method of forming foamed seal liners in container closures

Info

Publication number
ES380370A1
ES380370A1 ES380370A ES380370A ES380370A1 ES 380370 A1 ES380370 A1 ES 380370A1 ES 380370 A ES380370 A ES 380370A ES 380370 A ES380370 A ES 380370A ES 380370 A1 ES380370 A1 ES 380370A1
Authority
ES
Spain
Prior art keywords
caps
charges
container closures
thermoplastic resin
forming 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
ES380370A
Other languages
Spanish (es)
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.)
Zapata Industries Inc
Original Assignee
Zapata Industries Inc
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 Zapata Industries Inc filed Critical Zapata Industries Inc
Publication of ES380370A1 publication Critical patent/ES380370A1/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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating 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
    • 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
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/461—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • 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
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Molding Of Porous Articles (AREA)
  • Laminated Bodies (AREA)

Abstract

Foamed liners are moulded in closure caps S by forming a dry mixture of a thermoplastic resin and a blowing agent, working the mixture into a fused foamed state in an extruder 12, dispensing, by means of knife 16, discrete charges C into caps carried by a rotatable conveyer 18, transferring the loaded caps to a position over an anvil 20, and finally moulding the charges to shape using a cooled tool 22. The caps may be heated prior to receiving the charges and the thermoplastic resin is preferably P.V.C. plasticized by two synergistic plasticizers.
ES380370A 1969-07-30 1970-06-03 Method of forming foamed seal liners in container closures Expired ES380370A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84602769A 1969-07-30 1969-07-30

Publications (1)

Publication Number Publication Date
ES380370A1 true ES380370A1 (en) 1972-12-01

Family

ID=25296740

Family Applications (1)

Application Number Title Priority Date Filing Date
ES380370A Expired ES380370A1 (en) 1969-07-30 1970-06-03 Method of forming foamed seal liners in container closures

Country Status (8)

Country Link
JP (1) JPS4819386B1 (en)
CA (1) CA921669A (en)
DE (1) DE2033064B2 (en)
DK (1) DK131278B (en)
ES (1) ES380370A1 (en)
FR (1) FR2055296A5 (en)
GB (1) GB1241409A (en)
NL (1) NL7009737A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127910A (en) * 1977-06-14 1978-12-05 Usm Corporation Process for stiffening flexible sheet material
JPS593141B2 (en) * 1978-08-28 1984-01-23 大阪永柳工業株式会社 Manufacturing equipment for bottle lids with packing
US4448738A (en) * 1980-05-14 1984-05-15 Synergistics Chemicals Ltd. Process for producing foamed plastic articles

Also Published As

Publication number Publication date
DE2033064B2 (en) 1977-08-11
DE2033064A1 (en) 1971-02-04
DK131278C (en) 1975-11-17
GB1241409A (en) 1971-08-04
DK131278B (en) 1975-06-23
CA921669A (en) 1973-02-27
NL7009737A (en) 1971-02-02
FR2055296A5 (en) 1971-05-07
JPS4819386B1 (en) 1973-06-13

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19920903