JPS56142047A - Method and device for molding of formed body - Google Patents
Method and device for molding of formed bodyInfo
- Publication number
- JPS56142047A JPS56142047A JP4648080A JP4648080A JPS56142047A JP S56142047 A JPS56142047 A JP S56142047A JP 4648080 A JP4648080 A JP 4648080A JP 4648080 A JP4648080 A JP 4648080A JP S56142047 A JPS56142047 A JP S56142047A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- pin
- piston
- molding
- scrap
- 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
- B29C45/46—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
- B29C45/5675—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 for making orifices in or through the moulded article
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
PURPOSE: To obtain a molding of excellent finish having a hole without generation of welds and subject to no boring process by driving a punching pin before a molten material filled in a cavity could become solid, and pulling out the said pin after solidification.
CONSTITUTION: First, a movable mold 3 is matched to a fixed mold 4 to form a cavity 5. Next, a molten resin from an injection cylinder 8 is injected into the cavity 5 through channels 6, 7. After this step, the second and third hydraulic pistons 12, 14 are actuated during the period until an injected resin becomes semisolid. Following this process, a punching pin 11 is driven into the cavity 5 and at the same time, a scrap pin 13 is moved back. After this step, a resin inside the cavity 5 is cooled and solidified as it is and then the punching pin 11 is lifted up by means of the piston 12. Later, the movable mold 4 is opened to actuate a hydraulic piston 10 and a molding is taken out with the help of a knockout pin 9. Finally, a scrap is ejected by means of the piston 14.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4648080A JPS56142047A (en) | 1980-04-09 | 1980-04-09 | Method and device for molding of formed body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4648080A JPS56142047A (en) | 1980-04-09 | 1980-04-09 | Method and device for molding of formed body |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56142047A true JPS56142047A (en) | 1981-11-06 |
Family
ID=12748359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4648080A Pending JPS56142047A (en) | 1980-04-09 | 1980-04-09 | Method and device for molding of formed body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56142047A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6022314U (en) * | 1983-07-22 | 1985-02-15 | 株式会社ケンウッド | injection mold |
JPS63197619A (en) * | 1987-02-13 | 1988-08-16 | Pijiyon Kk | Drilling method of injection molding and drilling device therefor |
JPH0241915U (en) * | 1988-09-17 | 1990-03-22 | ||
JPH0489314U (en) * | 1990-08-10 | 1992-08-04 | ||
JPH04290714A (en) * | 1991-03-20 | 1992-10-15 | Shin Kobe Electric Mach Co Ltd | Molding method of molded object with hole |
-
1980
- 1980-04-09 JP JP4648080A patent/JPS56142047A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6022314U (en) * | 1983-07-22 | 1985-02-15 | 株式会社ケンウッド | injection mold |
JPS63197619A (en) * | 1987-02-13 | 1988-08-16 | Pijiyon Kk | Drilling method of injection molding and drilling device therefor |
JPH0241915U (en) * | 1988-09-17 | 1990-03-22 | ||
JPH0489314U (en) * | 1990-08-10 | 1992-08-04 | ||
JPH04290714A (en) * | 1991-03-20 | 1992-10-15 | Shin Kobe Electric Mach Co Ltd | Molding method of molded object with hole |
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