JPS57199634A - Method of pre-foaming foamable thermoplastic resin particle - Google Patents
Method of pre-foaming foamable thermoplastic resin particleInfo
- Publication number
- JPS57199634A JPS57199634A JP56084109A JP8410981A JPS57199634A JP S57199634 A JPS57199634 A JP S57199634A JP 56084109 A JP56084109 A JP 56084109A JP 8410981 A JP8410981 A JP 8410981A JP S57199634 A JPS57199634 A JP S57199634A
- Authority
- JP
- Japan
- Prior art keywords
- foaming
- steam
- foaming tank
- blowing
- foamed
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3461—Making or treating expandable particles
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
PURPOSE:To produce highly foamed particles uniformly in a short period, by carrying out the blowing of a heating medium when pre-foaming is effected in such a way that an internal pressure is exerted in a foaming tank. CONSTITUTION:Foamable polystyrene resin particles containing 8% of butane as a foaming agent are introduced from a hopper 3 into the foaming tank 1. A low pressure steam is blown into the foaming tank 1, a discharge vavle 64 is closed, the blowing of steam is continued with the foaming tank 1 closed, and the resin particles are foamed with the internal pressure of the foaming tank 1 retained at 0.01-0.05kg/cm<2>. When the top surface of the foamed particle layer reaches a first detector 81, the blowing of steam is stopped, the discharge valve 64 is opened, and then blowing of steam is resumed with the foaming tank 1 being open to the atmosphere, and when the top surface in the foaming tank reaches a second detector 82, the supply of steam is stopped and the foamed particles are obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56084109A JPS57199634A (en) | 1981-06-01 | 1981-06-01 | Method of pre-foaming foamable thermoplastic resin particle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56084109A JPS57199634A (en) | 1981-06-01 | 1981-06-01 | Method of pre-foaming foamable thermoplastic resin particle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57199634A true JPS57199634A (en) | 1982-12-07 |
JPS6241442B2 JPS6241442B2 (en) | 1987-09-03 |
Family
ID=13821351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56084109A Granted JPS57199634A (en) | 1981-06-01 | 1981-06-01 | Method of pre-foaming foamable thermoplastic resin particle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57199634A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5865635A (en) * | 1981-10-14 | 1983-04-19 | Hitachi Chem Co Ltd | Manufacture of prefoamed styrene resin particle |
FR2632563A1 (en) * | 1988-06-13 | 1989-12-15 | Garacci Patrice | Pre-expander machine intended for expanding particles used especially in packaging, including a start-of-moulding detector and safety means |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS565176A (en) * | 1979-06-26 | 1981-01-20 | Multi Koken Kk | Separation and removal of oils |
-
1981
- 1981-06-01 JP JP56084109A patent/JPS57199634A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS565176A (en) * | 1979-06-26 | 1981-01-20 | Multi Koken Kk | Separation and removal of oils |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5865635A (en) * | 1981-10-14 | 1983-04-19 | Hitachi Chem Co Ltd | Manufacture of prefoamed styrene resin particle |
JPS6220221B2 (en) * | 1981-10-14 | 1987-05-06 | Hitachi Chemical Co Ltd | |
FR2632563A1 (en) * | 1988-06-13 | 1989-12-15 | Garacci Patrice | Pre-expander machine intended for expanding particles used especially in packaging, including a start-of-moulding detector and safety means |
Also Published As
Publication number | Publication date |
---|---|
JPS6241442B2 (en) | 1987-09-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5790027A (en) | Prefoamed polypropylene resin particle and its production | |
US3953558A (en) | Method of moulding foamed synthetic resin pellets of polyolefine | |
ES2139701T3 (en) | MOLDED PIECE OF PLASTIC CELL MATERIAL, AND METHOD AND APPARATUS FOR ITS MANUFACTURE. | |
JPS5712035A (en) | Production of polyolefin resin molded foam | |
GB935136A (en) | Improvements in or relating to packing cases | |
KR830007377A (en) | Artificial cork stopper and method and apparatus for manufacturing same | |
US4032609A (en) | Method for pre-expanding and molding expandable thermoplastic polymer particles | |
GB1141668A (en) | Method of producing plastics objects having smooth skin portions and foamed interior portions | |
DE3264767D1 (en) | Method of producing a composite body with a hard foam core and a skin of hard foam with a higher density | |
GB971726A (en) | Porous product and method of manufacturing | |
MY123819A (en) | Expandable polystyrene resin beads,process for the preparation of them, and foam made by using the same | |
JPS57199634A (en) | Method of pre-foaming foamable thermoplastic resin particle | |
CA2030754A1 (en) | Production method of prefoamed synthetic resin particles | |
AU563349B2 (en) | Treatment of foam | |
JPS634909A (en) | Prefoaming of thermoplastic resin particle | |
GB1063398A (en) | Method for making expandable thermoplastic resinous material | |
JPS57191029A (en) | Manufacture of bridged polyolefinic foamed material | |
JPS57199635A (en) | Method of pre-foaming foamable thermoplastic resin particle | |
JPS5729432A (en) | Manufacture of foamed particle of thermoplastic resin | |
US3590105A (en) | Method of manufacture of a foamed polystyrene body | |
JPS557500A (en) | In-mold particle forming method for formed polyolefin synthetic resin particle | |
JPS56146735A (en) | Manufacture of heat-insulating case | |
GB838100A (en) | Improvements in or relating to the production of porous shaped bodies of thermoplastic material | |
JPS574743A (en) | Method of molding foamed resin component | |
JPS56136332A (en) | Production of split body of cooler case |