JPS5496562A - Low-pressure transfer molding machine - Google Patents
Low-pressure transfer molding machineInfo
- Publication number
- JPS5496562A JPS5496562A JP329178A JP329178A JPS5496562A JP S5496562 A JPS5496562 A JP S5496562A JP 329178 A JP329178 A JP 329178A JP 329178 A JP329178 A JP 329178A JP S5496562 A JPS5496562 A JP S5496562A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- heated
- resin
- plunger
- cull
- 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
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
PURPOSE:Heaters are distributed and embedded directly in the mold or in upper and lower bolsters supporting the mold and a guide block guiding plunger, thereby preventing the occurrence of uncuring and unloading even when the molding cycle is shortened. CONSTITUTION:Upper and lower halves 20, 32 of the mold are always heated to a uniform temperature by heaters 26, 34 which are embedded in upper and lower bolsters 19, 31. Further, plunger 24 also is heated by heater 27 in guide block 22 even when it stays above during except polymer extrusion. Resultingly, when molding is effected by putting down plunger 24 to extrude the resin that begins to melt on cull 35 through main and sub-runners 36, 37 and gate 38 into the cavity of the mold, the resin is sufficiently heated so that each resin in the cavity, runners, cull and oters attains a specified hardness during heated after a prescribed time because each half of the mold is uniformly heated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP329178A JPS5496562A (en) | 1978-01-18 | 1978-01-18 | Low-pressure transfer molding machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP329178A JPS5496562A (en) | 1978-01-18 | 1978-01-18 | Low-pressure transfer molding machine |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP790186A Division JPS61171316A (en) | 1986-01-20 | 1986-01-20 | Transfer molding machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5496562A true JPS5496562A (en) | 1979-07-31 |
JPS6258294B2 JPS6258294B2 (en) | 1987-12-04 |
Family
ID=11553280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP329178A Granted JPS5496562A (en) | 1978-01-18 | 1978-01-18 | Low-pressure transfer molding machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5496562A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57156322U (en) * | 1981-03-27 | 1982-10-01 | ||
JPH0231130U (en) * | 1988-08-22 | 1990-02-27 |
-
1978
- 1978-01-18 JP JP329178A patent/JPS5496562A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57156322U (en) * | 1981-03-27 | 1982-10-01 | ||
JPH0231130U (en) * | 1988-08-22 | 1990-02-27 |
Also Published As
Publication number | Publication date |
---|---|
JPS6258294B2 (en) | 1987-12-04 |
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