JPS648008A - Cast molding method - Google Patents
Cast molding methodInfo
- Publication number
- JPS648008A JPS648008A JP30691687A JP30691687A JPS648008A JP S648008 A JPS648008 A JP S648008A JP 30691687 A JP30691687 A JP 30691687A JP 30691687 A JP30691687 A JP 30691687A JP S648008 A JPS648008 A JP S648008A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- raw liquid
- casting
- frame
- low speed
- 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
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Polymerisation Methods In General (AREA)
Abstract
PURPOSE:To manufacture a superior molded product regarding the transmission and deflection of light without catching foams in by varying in two stages the casting speed of raw liquid into a frame. CONSTITUTION:Raw liquid mainly constituted of vinyl and/or vinylidene monomer containing or not containing a copolymer to be used is cast into a frame, and if necessary, the same is heated, pressed and polymerization cured. At that time, the speed of casting the raw liquid into the frame is at least varied in two stages. To put it concretely, the order of variation of casting speed should preferably be low speed - high speed. The casting line of the frame is adjusted to remain at low speed until the raw liquid is filled, and after that, the same is switched over to high speed when the raw liquid is started to come into a cavity section. In the case the shape of inside of the cavity is complicated, the variation of casting speed should preferably be further adjusted in an order of low speed - high speed - low speed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30691687A JP2503554B2 (en) | 1986-12-27 | 1987-12-03 | Cast molding method |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61-315206 | 1986-12-27 | ||
JP31520686 | 1986-12-27 | ||
JP30691687A JP2503554B2 (en) | 1986-12-27 | 1987-12-03 | Cast molding method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS648008A true JPS648008A (en) | 1989-01-12 |
JP2503554B2 JP2503554B2 (en) | 1996-06-05 |
Family
ID=26564910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30691687A Expired - Lifetime JP2503554B2 (en) | 1986-12-27 | 1987-12-03 | Cast molding method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2503554B2 (en) |
-
1987
- 1987-12-03 JP JP30691687A patent/JP2503554B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2503554B2 (en) | 1996-06-05 |
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