JPS56161132A - Structure of burrless mold - Google Patents

Structure of burrless mold

Info

Publication number
JPS56161132A
JPS56161132A JP6490480A JP6490480A JPS56161132A JP S56161132 A JPS56161132 A JP S56161132A JP 6490480 A JP6490480 A JP 6490480A JP 6490480 A JP6490480 A JP 6490480A JP S56161132 A JPS56161132 A JP S56161132A
Authority
JP
Japan
Prior art keywords
resin
reserving hole
pressure
excessive quantity
retrogress
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
JP6490480A
Other languages
Japanese (ja)
Inventor
Suguru Hamano
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP6490480A priority Critical patent/JPS56161132A/en
Publication of JPS56161132A publication Critical patent/JPS56161132A/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
    • 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
    • B29C45/26—Moulds
    • B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities

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

PURPOSE:To allow excessive quantity of resin to flow into a reserving hole to prevent burrs from occurring by a method wherein an excessive quantity reserving hole is provided on a runner part and a pressure controlling pin which can retrogress by resin pressure is inserted into this reserving hole. CONSTITUTION:The excessive quantity reserving hole 7 is provided at some one of a sprue 2, a runner 3 and a gate 4 which constitute resin passages and a pressure controlling pin 8 which can retrogress by the resin pressure exceeding a given pressure is inserted into this reserving hole 7 and further, this pressure control pin 8 is projected and energized by an elastic substance 9 like rubber and a spring, etc. Excessive quantity of resin over one shot of quantity pushes and retrogresses the pressure control pin 8, is allowed to flow into the excessive quantity reserving hole 7, and therefore, the excessive quantity of resin flows into a parting surface 11 to prevent burrs from occurring. This method is applied to injection molding and transfer molding.
JP6490480A 1980-05-15 1980-05-15 Structure of burrless mold Pending JPS56161132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6490480A JPS56161132A (en) 1980-05-15 1980-05-15 Structure of burrless mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6490480A JPS56161132A (en) 1980-05-15 1980-05-15 Structure of burrless mold

Publications (1)

Publication Number Publication Date
JPS56161132A true JPS56161132A (en) 1981-12-11

Family

ID=13271509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6490480A Pending JPS56161132A (en) 1980-05-15 1980-05-15 Structure of burrless mold

Country Status (1)

Country Link
JP (1) JPS56161132A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6238125U (en) * 1985-08-26 1987-03-06
CN103737810A (en) * 2013-12-27 2014-04-23 中山市利群精密实业有限公司 Plastic mold dissolving wire structure
CN107520421A (en) * 2017-08-11 2017-12-29 江苏中伟业通讯设备有限公司 A kind of antenna holder base angle die-casting forming die
CN107570679A (en) * 2017-08-11 2018-01-12 江苏中伟业通讯设备有限公司 A kind of antenna holder hinge die casting

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6238125U (en) * 1985-08-26 1987-03-06
CN103737810A (en) * 2013-12-27 2014-04-23 中山市利群精密实业有限公司 Plastic mold dissolving wire structure
CN107520421A (en) * 2017-08-11 2017-12-29 江苏中伟业通讯设备有限公司 A kind of antenna holder base angle die-casting forming die
CN107570679A (en) * 2017-08-11 2018-01-12 江苏中伟业通讯设备有限公司 A kind of antenna holder hinge die casting

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