JPS56161132A - Structure of burrless mold - Google Patents
Structure of burrless moldInfo
- 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
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.
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)
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 |
-
1980
- 1980-05-15 JP JP6490480A patent/JPS56161132A/en active Pending
Cited By (4)
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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