GB581197A - Improvements in the manufacture of lenses - Google Patents

Improvements in the manufacture of lenses

Info

Publication number
GB581197A
GB581197A GB1201344A GB1201344A GB581197A GB 581197 A GB581197 A GB 581197A GB 1201344 A GB1201344 A GB 1201344A GB 1201344 A GB1201344 A GB 1201344A GB 581197 A GB581197 A GB 581197A
Authority
GB
United Kingdom
Prior art keywords
dies
lenses
sockets
group
die
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
GB1201344A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1201344A priority Critical patent/GB581197A/en
Publication of GB581197A publication Critical patent/GB581197A/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • 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
    • B29C45/4005—Ejector constructions; Ejector operating mechanisms
    • 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
    • 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
    • B29C2045/563—Enlarging the mould cavity 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
    • 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
    • B29C2045/5635—Mould integrated compression drive means
    • 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
    • B29C2045/5645—Resilient compression means
    • 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
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses

Landscapes

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

Abstract

581,197. Moulding lenses from polystyrene &c. JOHNSON, J. June 23, 1944, No. 12013. [Class 87 (ii)] A lens mould for an injection-moulding apparatus comprises a fixed platen 16 carrying two or more dies 12, 13, and a movable platen 25 carrying complementary dies 21, 22. When the platens have been brought together, plastic material is forced into the die spaces and pushes back the dies 12, 13, against springs 17, until the dies abut the bases of the die sockets 14, 15. The springs maintain pressure on the dies 12, 13 during cooling and shrinking of the lens. In order to determine with precision the thickness of the lenses, the movement of the dies in their sockets may be limited by adjustable stops. Specifications 416,398, [Group XX], 544,472, 556,743, [Group XI], 560,881, 564,257 and 572,748 are referred to.
GB1201344A 1944-06-23 1944-06-23 Improvements in the manufacture of lenses Expired GB581197A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1201344A GB581197A (en) 1944-06-23 1944-06-23 Improvements in the manufacture of lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1201344A GB581197A (en) 1944-06-23 1944-06-23 Improvements in the manufacture of lenses

Publications (1)

Publication Number Publication Date
GB581197A true GB581197A (en) 1946-10-03

Family

ID=9996838

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1201344A Expired GB581197A (en) 1944-06-23 1944-06-23 Improvements in the manufacture of lenses

Country Status (1)

Country Link
GB (1) GB581197A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2321886A1 (en) * 1972-05-02 1973-11-15 Polaroid Corp PROCESS FOR THE MANUFACTURING OF LIGHT-POLARIZING PLASTIC LENSES AND A SUITABLE FORM
EP0144622A1 (en) * 1983-10-11 1985-06-19 American Optical Corporation Apparatus and method for injection molding lenses
EP0673746A1 (en) * 1994-03-11 1995-09-27 MASCHINENFABRIK HENNECKE GmbH Method and apparatus for manufacturing moulded articles from multi-component plastic materials
WO2002030651A1 (en) * 2000-10-02 2002-04-18 Krauss-Maffei Kunststofftechnik Gmbh Method and device for producing thick-walled moulded parts

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2321886A1 (en) * 1972-05-02 1973-11-15 Polaroid Corp PROCESS FOR THE MANUFACTURING OF LIGHT-POLARIZING PLASTIC LENSES AND A SUITABLE FORM
EP0144622A1 (en) * 1983-10-11 1985-06-19 American Optical Corporation Apparatus and method for injection molding lenses
EP0673746A1 (en) * 1994-03-11 1995-09-27 MASCHINENFABRIK HENNECKE GmbH Method and apparatus for manufacturing moulded articles from multi-component plastic materials
WO2002030651A1 (en) * 2000-10-02 2002-04-18 Krauss-Maffei Kunststofftechnik Gmbh Method and device for producing thick-walled moulded parts
EP1533099A2 (en) * 2000-10-02 2005-05-25 Krauss-Maffei Kunststofftechnik GmbH Method and device for producing thick-walled moulded parts
EP1533099A3 (en) * 2000-10-02 2005-08-31 Krauss-Maffei Kunststofftechnik GmbH Method and device for producing thick-walled moulded parts
DE10066272B4 (en) * 2000-10-02 2009-01-29 Kraussmaffei Technologies Gmbh Method and device for producing thick-walled molded parts

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