NL7114168A - Moulded plastic book bindings - made by injection moulding - Google Patents

Moulded plastic book bindings - made by injection moulding

Info

Publication number
NL7114168A
NL7114168A NL7114168A NL7114168A NL7114168A NL 7114168 A NL7114168 A NL 7114168A NL 7114168 A NL7114168 A NL 7114168A NL 7114168 A NL7114168 A NL 7114168A NL 7114168 A NL7114168 A NL 7114168A
Authority
NL
Netherlands
Prior art keywords
mould
membrane
core
injection moulding
moulded plastic
Prior art date
Application number
NL7114168A
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 filed Critical
Priority to NL7114168A priority Critical patent/NL7114168A/en
Publication of NL7114168A publication Critical patent/NL7114168A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C7/00—Manufacturing bookbinding cases or covers of books or loose-leaf binders
    • 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
    • B29C45/5675—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 for making orifices in or through the moulded article
    • 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
    • B29L2031/22—Hinges, pivots

Landscapes

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

Abstract

In a process for fabricating a plastic article having two portions joined by a core or membrane of the same material, the article is injection moulded and the plastic material compressed in the neighbourhood of the core or membrane required at the time when the material is still in the mould. The difficulties of moulding such articles are overcome by compressing the membrane section to the required thickness after preforming in the mould. The core or membrane is compressed to shape by introducing a plate or sheet which enters the mould after injection and complete filling of the mould. The tool may be mounted on shafts operated by springs, the punch having an alternating motion.
NL7114168A 1971-10-14 1971-10-14 Moulded plastic book bindings - made by injection moulding NL7114168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7114168A NL7114168A (en) 1971-10-14 1971-10-14 Moulded plastic book bindings - made by injection moulding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7114168A NL7114168A (en) 1971-10-14 1971-10-14 Moulded plastic book bindings - made by injection moulding

Publications (1)

Publication Number Publication Date
NL7114168A true NL7114168A (en) 1973-04-17

Family

ID=19814265

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7114168A NL7114168A (en) 1971-10-14 1971-10-14 Moulded plastic book bindings - made by injection moulding

Country Status (1)

Country Link
NL (1) NL7114168A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1019320C2 (en) * 2001-11-07 2003-04-28 Novem Internat B V Formation of thin-walled products from plastic mold comprises introducing heated plastic in mold cavity while mold is partly open, and pressing away plastic in mold cavity by wall parts of mold cavity
NL1019235C2 (en) * 2001-10-25 2003-04-28 Novem Internat B V Formation of thin-walled products from plastic mold comprises introducing heated plastic in mold cavity while mold is partly open, and pressing away plastic in mold cavity by wall parts of mold cavity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1019235C2 (en) * 2001-10-25 2003-04-28 Novem Internat B V Formation of thin-walled products from plastic mold comprises introducing heated plastic in mold cavity while mold is partly open, and pressing away plastic in mold cavity by wall parts of mold cavity
NL1019320C2 (en) * 2001-11-07 2003-04-28 Novem Internat B V Formation of thin-walled products from plastic mold comprises introducing heated plastic in mold cavity while mold is partly open, and pressing away plastic in mold cavity by wall parts of mold cavity

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Legal Events

Date Code Title Description
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed