JPS6469314A - Method for molding fresnel lens - Google Patents

Method for molding fresnel lens

Info

Publication number
JPS6469314A
JPS6469314A JP22609887A JP22609887A JPS6469314A JP S6469314 A JPS6469314 A JP S6469314A JP 22609887 A JP22609887 A JP 22609887A JP 22609887 A JP22609887 A JP 22609887A JP S6469314 A JPS6469314 A JP S6469314A
Authority
JP
Japan
Prior art keywords
workpiece
fresnel lens
fresnel
punches
lower punches
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.)
Pending
Application number
JP22609887A
Other languages
Japanese (ja)
Inventor
Naohito Orito
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.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP22609887A priority Critical patent/JPS6469314A/en
Publication of JPS6469314A publication Critical patent/JPS6469314A/en
Pending 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
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete 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
    • 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
    • B29C43/56—Compression moulding under special conditions, e.g. vacuum
    • 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
    • B29C2043/3272—Component parts, details or accessories; Auxiliary operations driving means
    • B29C2043/3283—Component parts, details or accessories; Auxiliary operations driving means for moving moulds or mould parts
    • 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
    • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
    • B29C2043/3615—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices
    • B29C2043/3618—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices plurality of counteracting elements
    • 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
    • B29L2011/005—Fresnel lenses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To uniformly obtain a good quality product with favorable flatness and transferability in a short time by a method wherein a workpiece is pinched between an upper and a lower punches, on one workpiece pinching surface of which a Fresnel surface is provided, and softened by vibrational heat so is to be pressed with the punches in order to mold a Fresnel lens with a flange on its peripheral edge and, after that, dwelled by an upper and a lower dies and finally the punch equipped with the Fresnel surface is released from a Fresnel lens body. CONSTITUTION:A workpiece 17 is charged between an upper and a lower dies 1 and 2 and an upper and a lower punches 3 and 4 so as to pinch the work piece 17 between the upper and the lower dies 1 and 2 and between the upper and the lower punches 3 and 4 in order to let the workpiece 17 generate heat by itself by vibrating the upper and the lower punches 3 and 4 through a vibratory frame 5 with a vibratory actuator 6. At the time when the work piece material 17 is sufficiently softened by said heat, the Fresnel surface off the upper punch 3 is pressed with a molding actuator 7 to the workpiece 17 in order to transfer the Fresnel surface to the workpiece 17. After transfer, under the state that the upper and the lower dies 1 and 2 and the upper and time lower punches 3 and 4 are kept immoble, a Fresnel lens body is cooled and hardened. Finally, a Fresnel lens is obtained by releasing it from the upper punch 3.
JP22609887A 1987-09-09 1987-09-09 Method for molding fresnel lens Pending JPS6469314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22609887A JPS6469314A (en) 1987-09-09 1987-09-09 Method for molding fresnel lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22609887A JPS6469314A (en) 1987-09-09 1987-09-09 Method for molding fresnel lens

Publications (1)

Publication Number Publication Date
JPS6469314A true JPS6469314A (en) 1989-03-15

Family

ID=16839794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22609887A Pending JPS6469314A (en) 1987-09-09 1987-09-09 Method for molding fresnel lens

Country Status (1)

Country Link
JP (1) JPS6469314A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6261105B1 (en) 1998-12-04 2001-07-17 Yazaki Corporation Electric connection box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6261105B1 (en) 1998-12-04 2001-07-17 Yazaki Corporation Electric connection box

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