JPS6490731A - Foam molding method for thermoplastic resin - Google Patents
Foam molding method for thermoplastic resinInfo
- Publication number
- JPS6490731A JPS6490731A JP62248119A JP24811987A JPS6490731A JP S6490731 A JPS6490731 A JP S6490731A JP 62248119 A JP62248119 A JP 62248119A JP 24811987 A JP24811987 A JP 24811987A JP S6490731 A JPS6490731 A JP S6490731A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- valve
- pressure
- mold
- air
- 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
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
PURPOSE:To enable the title method to perform safe and stable foam molding operation by shortening a steam feed period of time, by a method wherein heating steam is fed by giving a pulsation to the feed steam by a regulator while pressure control of a male and female molds are being performed separately. CONSTITUTION:A molding mold is constituted of a male and female molds 1, 2 possessing inner plate with a vent hole and chambers 11, 21 as a pair. Steam feed pipes 3 feeding heating steam through a heating steam source S to the chamber parts 11, 21 are provided and valves 5 having pressure control parts 4 connecting with an air source P are provided into the steam feed pipes 3 as interposition. The operation of the valve 5 is performed at a pressure control part 4 of a diaphragm 13 through a variation of balance among air pressure of regulated air for opening and closing of the valve from a pressure reducing valve 10 and solenoid valve 9 for the opening and closing, secondary side steam connected with the mold and pressure control air. Regulators 24 are arranged to each piping 7 so that steam pressure of the male mold 1 and female mold 2 can be controlled separately and pulsation is given to steam feed through control of the opening and closing by the valve 5 through control of the regulator 24 by the command of a computer 25.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62248119A JP2519478B2 (en) | 1987-10-02 | 1987-10-02 | Foam molding method for thermoplastic resin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62248119A JP2519478B2 (en) | 1987-10-02 | 1987-10-02 | Foam molding method for thermoplastic resin |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6490731A true JPS6490731A (en) | 1989-04-07 |
JP2519478B2 JP2519478B2 (en) | 1996-07-31 |
Family
ID=17173512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62248119A Expired - Lifetime JP2519478B2 (en) | 1987-10-02 | 1987-10-02 | Foam molding method for thermoplastic resin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2519478B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62216734A (en) * | 1986-03-19 | 1987-09-24 | Yoshihiko Seki | Process for foam molding of thermoplastic resin |
-
1987
- 1987-10-02 JP JP62248119A patent/JP2519478B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62216734A (en) * | 1986-03-19 | 1987-09-24 | Yoshihiko Seki | Process for foam molding of thermoplastic resin |
Also Published As
Publication number | Publication date |
---|---|
JP2519478B2 (en) | 1996-07-31 |
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