JPS5751434A - Gate structure in metallic mold - Google Patents
Gate structure in metallic moldInfo
- Publication number
- JPS5751434A JPS5751434A JP12777180A JP12777180A JPS5751434A JP S5751434 A JPS5751434 A JP S5751434A JP 12777180 A JP12777180 A JP 12777180A JP 12777180 A JP12777180 A JP 12777180A JP S5751434 A JPS5751434 A JP S5751434A
- Authority
- JP
- Japan
- Prior art keywords
- runner
- resin
- tunnel gate
- mold
- cavity
- 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
- 239000011347 resin Substances 0.000 abstract 6
- 229920005989 resin Polymers 0.000 abstract 6
- 230000005489 elastic deformation Effects 0.000 abstract 1
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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
PURPOSE:To prevent breaks of resin on a tunnel gate part from extending to the molded part when said resin is cut off from the molded part by a method wherein the tunnel gate is provided to connect a runner to a cavity and pins are arranged at one end of the runner to reduce thickness of the runner. CONSTITUTION:A runner 3, a cavity 4 and a tunnel gate 5 are provided in a mold A and a pin 14 is arranged at one end of a runner 3 connected to the tunnel gate in the mold A. When resin is injected in the mold, the thickness of resin reduces at one end of the runner into which the pin 14 of filled resin projects. When the molded part and the runner part of filled resin are projected by ejector pins 8, 12, 13 and the mold part is cut off at the opening part to the cavity of the tunnel gate, the thin thickness part of the runner is subjected to elastic deformation and overload is prevented from being given to the opening part to the cavity of the tunnel gate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12777180A JPS5751434A (en) | 1980-09-13 | 1980-09-13 | Gate structure in metallic mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12777180A JPS5751434A (en) | 1980-09-13 | 1980-09-13 | Gate structure in metallic mold |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5751434A true JPS5751434A (en) | 1982-03-26 |
Family
ID=14968281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12777180A Pending JPS5751434A (en) | 1980-09-13 | 1980-09-13 | Gate structure in metallic mold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5751434A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7374419B2 (en) | 2005-06-24 | 2008-05-20 | Hon Hai Precision Industry Co., Ltd. | Gating structure for mold |
-
1980
- 1980-09-13 JP JP12777180A patent/JPS5751434A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7374419B2 (en) | 2005-06-24 | 2008-05-20 | Hon Hai Precision Industry Co., Ltd. | Gating structure for mold |
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