JPS57207031A - Extruder for thermoplastic resin highly foamed body - Google Patents
Extruder for thermoplastic resin highly foamed bodyInfo
- Publication number
- JPS57207031A JPS57207031A JP56092565A JP9256581A JPS57207031A JP S57207031 A JPS57207031 A JP S57207031A JP 56092565 A JP56092565 A JP 56092565A JP 9256581 A JP9256581 A JP 9256581A JP S57207031 A JPS57207031 A JP S57207031A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- foaming agent
- kneading section
- kneading
- facilitating
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Abstract
PURPOSE:To improve the mixing ability of a foaming agent into a resin and the back- flow phenomenon of the foaming agent, by providing a flight screw between a first kneading section for facilitating the kneading of a resin and a second kneading section for facilitating the mixing of a foaming agent into the resin. CONSTITUTION:The tapered flight screw 39 is arranged between the first kneading section 8 for facilitating the kneading of a resin and for preventing a foaming agent from flowing backward and the second kneading section 10 for facilitating the mixing of a foaming agent into the resin. As a result, the sectional area at the flight screw 39, through which the resin flows, diverges downstream to increase the volume of the resin passing there, and therefore the distribution of the extrusion pressure decreases adjacent to a foaming agent introducing port 11. Accordingly, the injection of the resin can be facilitated, and as the pressure at the kneading section 8 is high, the flow back of the foaming agent can be obviated. As the extrusion pressure of the injected foaming agent increases downstream of the screw 39, it beings to be dispersed into the resin, and since the foaming agent is dispersed uniformly into the resin when it passes the kneading section 10, after the extrusion a foamed body with fine and uniform bubbles can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56092565A JPS57207031A (en) | 1981-06-16 | 1981-06-16 | Extruder for thermoplastic resin highly foamed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56092565A JPS57207031A (en) | 1981-06-16 | 1981-06-16 | Extruder for thermoplastic resin highly foamed body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57207031A true JPS57207031A (en) | 1982-12-18 |
| JPS6127172B2 JPS6127172B2 (en) | 1986-06-24 |
Family
ID=14057940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56092565A Granted JPS57207031A (en) | 1981-06-16 | 1981-06-16 | Extruder for thermoplastic resin highly foamed body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57207031A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0167019U (en) * | 1987-10-24 | 1989-04-28 | ||
| JP2011083976A (en) * | 2009-10-16 | 2011-04-28 | Screw Seiki Kk | Screw for molding machine |
| JP2012218158A (en) * | 2011-04-04 | 2012-11-12 | Japan Steel Works Ltd:The | Screw piece structure |
-
1981
- 1981-06-16 JP JP56092565A patent/JPS57207031A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0167019U (en) * | 1987-10-24 | 1989-04-28 | ||
| JPH0620587Y2 (en) * | 1987-10-24 | 1994-06-01 | 株式会社石中鉄工所 | Rotary screw for kneading |
| JP2011083976A (en) * | 2009-10-16 | 2011-04-28 | Screw Seiki Kk | Screw for molding machine |
| JP2012218158A (en) * | 2011-04-04 | 2012-11-12 | Japan Steel Works Ltd:The | Screw piece structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127172B2 (en) | 1986-06-24 |
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