JPS6463122A - Injection molding - Google Patents
Injection moldingInfo
- Publication number
- JPS6463122A JPS6463122A JP22033387A JP22033387A JPS6463122A JP S6463122 A JPS6463122 A JP S6463122A JP 22033387 A JP22033387 A JP 22033387A JP 22033387 A JP22033387 A JP 22033387A JP S6463122 A JPS6463122 A JP S6463122A
- Authority
- JP
- Japan
- Prior art keywords
- mold cavity
- injection
- resin
- poured
- mold
- 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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
PURPOSE:To manufacture a molded item with neither sinking nor warping by a method wherein dwelling process is carried out by applying back pressure with pressurized gas fluid as medium after molten resin is poured in a mold cavity by injection. CONSTITUTION:Resin, which is melted and plasticized in an injection cylinder 2, is poured through a nozzle 5 in a mold cavity 10 by injection. After that, pressurized gas is poured through a nozzle 6 in the mold cavity. Forced pressurized gas fluid flows in the interior of the molten resin in the mold cavity so as to press the resin against the surface of the mold. After the resin in the mold cavity is fully cooled down, a molded item is taken out of the mold. Thus, an injection-molded item can be obtained, which has neither sinking at unevenly thick part due to volumetric shrinkage nor warpage due to molding strain, and has high molding accuracy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22033387A JPS6463122A (en) | 1987-09-04 | 1987-09-04 | Injection molding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22033387A JPS6463122A (en) | 1987-09-04 | 1987-09-04 | Injection molding |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6463122A true JPS6463122A (en) | 1989-03-09 |
Family
ID=16749503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22033387A Pending JPS6463122A (en) | 1987-09-04 | 1987-09-04 | Injection molding |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6463122A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5071756A (en) * | 1973-10-25 | 1975-06-13 | ||
JPS54123173A (en) * | 1978-03-18 | 1979-09-25 | Asahi Chem Ind Co Ltd | Method of monitoring molding process for hollow or foamed shapes |
JPS6024913A (en) * | 1983-05-11 | 1985-02-07 | ピールレス シンプレス リミティド | Injection molding method and device |
JPS63281813A (en) * | 1987-05-14 | 1988-11-18 | Matsushita Electric Ind Co Ltd | Injection mold assembly |
-
1987
- 1987-09-04 JP JP22033387A patent/JPS6463122A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5071756A (en) * | 1973-10-25 | 1975-06-13 | ||
JPS54123173A (en) * | 1978-03-18 | 1979-09-25 | Asahi Chem Ind Co Ltd | Method of monitoring molding process for hollow or foamed shapes |
JPS6024913A (en) * | 1983-05-11 | 1985-02-07 | ピールレス シンプレス リミティド | Injection molding method and device |
JPS63281813A (en) * | 1987-05-14 | 1988-11-18 | Matsushita Electric Ind Co Ltd | Injection mold assembly |
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