JPS57191011A - Mold - Google Patents

Mold

Info

Publication number
JPS57191011A
JPS57191011A JP7653581A JP7653581A JPS57191011A JP S57191011 A JPS57191011 A JP S57191011A JP 7653581 A JP7653581 A JP 7653581A JP 7653581 A JP7653581 A JP 7653581A JP S57191011 A JPS57191011 A JP S57191011A
Authority
JP
Japan
Prior art keywords
mold
resin
header
closely
lead
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
JP7653581A
Other languages
Japanese (ja)
Inventor
Takashi Nakagawa
Tomoo Sakamoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7653581A priority Critical patent/JPS57191011A/en
Publication of JPS57191011A publication Critical patent/JPS57191011A/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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • B29C33/0044—Moulds or cores; Details thereof or accessories therefor with sealing means or the like for sealing off parts of inserts projecting into the mould cavity
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Abstract

PURPOSE:To prevent the occurrence of resin flash due to a dimensional tolerance of thickness between a lead and a header by a method wherein a resin mold in which the parts other than the space into which a resin is to be injected are closely narrowed by crushing the header by an acute-angled projection provided to a mold. CONSTITUTION:When clamping the upper mold 4 and the lower mold 5 of a mold device 3, a lead 1 is pressed by the upper mold 4 and the lower mold 5 and a header 2 is crushed by the projection 8 of the lower mold 5. The distance e between the tip of the projection 8 and the upper mold 4 is so designed that the lead can be closely narrowed even at a maximum thickness and also the header can be closely narrowed even at a minimum thicnkess. Under the condition, a resin is injected into an resin-injection space 9.
JP7653581A 1981-05-22 1981-05-22 Mold Pending JPS57191011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7653581A JPS57191011A (en) 1981-05-22 1981-05-22 Mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7653581A JPS57191011A (en) 1981-05-22 1981-05-22 Mold

Publications (1)

Publication Number Publication Date
JPS57191011A true JPS57191011A (en) 1982-11-24

Family

ID=13607961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7653581A Pending JPS57191011A (en) 1981-05-22 1981-05-22 Mold

Country Status (1)

Country Link
JP (1) JPS57191011A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5252052A (en) * 1990-12-28 1993-10-12 Sgs-Thomson Microelectronics S.R.L. Mold for manufacturing plastic integrated circuits incorporating a heat sink
US7849586B2 (en) 2003-07-16 2010-12-14 Marvell World Trade Ltd. Method of making a power inductor with reduced DC current saturation
US7868725B2 (en) 2003-07-16 2011-01-11 Marvell World Trade Ltd. Power inductor with reduced DC current saturation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5252052A (en) * 1990-12-28 1993-10-12 Sgs-Thomson Microelectronics S.R.L. Mold for manufacturing plastic integrated circuits incorporating a heat sink
US7849586B2 (en) 2003-07-16 2010-12-14 Marvell World Trade Ltd. Method of making a power inductor with reduced DC current saturation
US7868725B2 (en) 2003-07-16 2011-01-11 Marvell World Trade Ltd. Power inductor with reduced DC current saturation
US7882614B2 (en) 2003-07-16 2011-02-08 Marvell World Trade Ltd. Method for providing a power inductor
US7987580B2 (en) 2003-07-16 2011-08-02 Marvell World Trade Ltd. Method of fabricating conductor crossover structure for power inductor
US8028401B2 (en) 2003-07-16 2011-10-04 Marvell World Trade Ltd. Method of fabricating a conducting crossover structure for a power inductor

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