JPS6467315A - Injection molding method and its device - Google Patents
Injection molding method and its deviceInfo
- Publication number
- JPS6467315A JPS6467315A JP22424087A JP22424087A JPS6467315A JP S6467315 A JPS6467315 A JP S6467315A JP 22424087 A JP22424087 A JP 22424087A JP 22424087 A JP22424087 A JP 22424087A JP S6467315 A JPS6467315 A JP S6467315A
- Authority
- JP
- Japan
- Prior art keywords
- molding material
- cavity
- weir
- filled
- gate
- 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.)
- Granted
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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
-
- 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
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
- B29C2045/0049—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity the injected material flowing against a mould cavity protruding part
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 reduce generation of short shot defects of a thin wall section and make a device compact by filling a molding material in a first cavity divided from other sections by means of a movable weir surrounding sections hard to be filled with the molding material and a gate and then moving the weir to a retreated position. CONSTITUTION:A cyclic holding channel 15 is formed in a manner that a gate 4 and a thin wall section 26 are positioned inside the channel on the lower surface of a fixed mold 5, and a weir 8 is held in the holding channel 15. When a molding material is injected from a gate 4 in the state of disposing said weir 8 protrudingly in a dividing position to form a first cavity 9, the molding material is filled completely in the first cavity 9. Then the molding material is flowed into a space delta and the weir 8 is moved upwardly by the action of injection pressure of the molding material, filled in the whole of a cavity 2 to form a molded product 1. As the molding material is filled in the other parts of the cavity after being filled in the thin wall section and the like as above-mentioned, short shot defects can be reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22424087A JPS6467315A (en) | 1987-09-08 | 1987-09-08 | Injection molding method and its device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22424087A JPS6467315A (en) | 1987-09-08 | 1987-09-08 | Injection molding method and its device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6467315A true JPS6467315A (en) | 1989-03-14 |
JPH0528647B2 JPH0528647B2 (en) | 1993-04-27 |
Family
ID=16810688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22424087A Granted JPS6467315A (en) | 1987-09-08 | 1987-09-08 | Injection molding method and its device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6467315A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010088552A (en) * | 2008-10-06 | 2010-04-22 | Maxell Seiki Kk | Method of manufacturing thin cap, the thin cap, and dirt prevention cover provided with lens cap |
-
1987
- 1987-09-08 JP JP22424087A patent/JPS6467315A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010088552A (en) * | 2008-10-06 | 2010-04-22 | Maxell Seiki Kk | Method of manufacturing thin cap, the thin cap, and dirt prevention cover provided with lens cap |
Also Published As
Publication number | Publication date |
---|---|
JPH0528647B2 (en) | 1993-04-27 |
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