NL7711796A - Sliding sleeve insert pins for injection moulding undercut profiles - suitable for disengaging small diameter recesses - Google Patents

Sliding sleeve insert pins for injection moulding undercut profiles - suitable for disengaging small diameter recesses

Info

Publication number
NL7711796A
NL7711796A NL7711796A NL7711796A NL7711796A NL 7711796 A NL7711796 A NL 7711796A NL 7711796 A NL7711796 A NL 7711796A NL 7711796 A NL7711796 A NL 7711796A NL 7711796 A NL7711796 A NL 7711796A
Authority
NL
Netherlands
Prior art keywords
sleeves
core
small diameter
injection moulding
sliding sleeve
Prior art date
Application number
NL7711796A
Other languages
Dutch (nl)
Other versions
NL188626B (en
NL188626C (en
Original Assignee
Geyer & Co Fa
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 Geyer & Co Fa filed Critical Geyer & Co Fa
Priority to NL7711796A priority Critical patent/NL188626C/en
Publication of NL7711796A publication Critical patent/NL7711796A/en
Publication of NL188626B publication Critical patent/NL188626B/en
Application granted granted Critical
Publication of NL188626C publication Critical patent/NL188626C/en

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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores

Landscapes

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

Abstract

Cavity inserts comprise a stationary core having tapered faces supporting segmented sleeves which can slide along dovetailed beds on the core faces. Alternate beds lie at different angles to the core axis so that adjacent sliding sleeves converge radially at different rates. Adjacent sleeves have complementary arcuate and trapezoidal cross-sections with bevelled edges which mate so that the sleeves present a continuous surface when fully deployed radially. The trapezoidal sleeves ride the steeper core faces to make room for the overlapping arcuate sleeves to also converge, more slowly on the shallower slopes. Used for captive inserts to remain in an injection moulding tool and release ribbed or undercut recesses in the moulding. Simple and compact enough for automatic cycling and small diameter recesses.
NL7711796A 1977-10-27 1977-10-27 SPREADING CORE FOR THE MANUFACTURE OF NOZZLES. NL188626C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7711796A NL188626C (en) 1977-10-27 1977-10-27 SPREADING CORE FOR THE MANUFACTURE OF NOZZLES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7711796A NL188626C (en) 1977-10-27 1977-10-27 SPREADING CORE FOR THE MANUFACTURE OF NOZZLES.

Publications (3)

Publication Number Publication Date
NL7711796A true NL7711796A (en) 1979-05-02
NL188626B NL188626B (en) 1992-03-16
NL188626C NL188626C (en) 1992-08-17

Family

ID=19829421

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7711796A NL188626C (en) 1977-10-27 1977-10-27 SPREADING CORE FOR THE MANUFACTURE OF NOZZLES.

Country Status (1)

Country Link
NL (1) NL188626C (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR978063A (en) * 1948-11-15 1951-04-09 Advanced mold for the manufacture of hollow objects by injection of thermoplastic materials
NL6412871A (en) * 1963-11-12 1965-05-13
NL7003233A (en) * 1970-03-06 1971-09-08
US4021180A (en) * 1974-12-20 1977-05-03 Standard Oil Company (Indiana) Collapsible core

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR978063A (en) * 1948-11-15 1951-04-09 Advanced mold for the manufacture of hollow objects by injection of thermoplastic materials
NL6412871A (en) * 1963-11-12 1965-05-13
NL7003233A (en) * 1970-03-06 1971-09-08
US4021180A (en) * 1974-12-20 1977-05-03 Standard Oil Company (Indiana) Collapsible core

Also Published As

Publication number Publication date
NL188626B (en) 1992-03-16
NL188626C (en) 1992-08-17

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
A85 Still pending on 85-01-01
BB A search report has been drawn up
BC A request for examination has been filed
V1 Lapsed because of non-payment of the annual fee