PT81361B - POLYSTYRENE MOLD EXPANDED FOR THE PRODUCTION OF PECAS WITH SOFT SURFACES AND PROCESS FOR FORMING AN EXPANDED PLASTIC PECKE - Google Patents
POLYSTYRENE MOLD EXPANDED FOR THE PRODUCTION OF PECAS WITH SOFT SURFACES AND PROCESS FOR FORMING AN EXPANDED PLASTIC PECKEInfo
- Publication number
- PT81361B PT81361B PT81361A PT8136185A PT81361B PT 81361 B PT81361 B PT 81361B PT 81361 A PT81361 A PT 81361A PT 8136185 A PT8136185 A PT 8136185A PT 81361 B PT81361 B PT 81361B
- Authority
- PT
- Portugal
- Prior art keywords
- chamber
- cavity
- expanded
- manifold
- pecke
- Prior art date
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
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Prefoamed resin beads are introduced into a mould cavity defined by separable wall portions of the mould. The mould has a chamber defined exteriorly of and associated with each wall portion with a heating medium introduced into the chamber to heat the corresponding wall portion, and a cooling medium introduced into the chamber to cool the wall portion when needed. Steam, condensate, and cooling water can be removed from the chamber. A number of nozzles are provided in at least one of the wall portions of the cavity with tubes connecting the nozzles to a manifold located in the chamber, each nozzle being flush with the inner wall of the cavity and so small as to prevent marking of the moulding produced in the cavity. Pressurised heating medium being introduced into the manifold for injection into the cavity to expand the prefoamed beads with the manifold having an arrangement to provide controlled discharge of steam or condensate from the manifold.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/667,067 US4627946A (en) | 1983-11-07 | 1984-11-01 | Method and molding apparatus for molding expanded polystyrene articles having smooth surfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PT81361A PT81361A (en) | 1985-11-01 |
| PT81361B true PT81361B (en) | 1987-09-18 |
Family
ID=24676664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PT81361A PT81361B (en) | 1984-11-01 | 1985-10-23 | POLYSTYRENE MOLD EXPANDED FOR THE PRODUCTION OF PECAS WITH SOFT SURFACES AND PROCESS FOR FORMING AN EXPANDED PLASTIC PECKE |
Country Status (8)
| Country | Link |
|---|---|
| KR (1) | KR900003736B1 (en) |
| AT (1) | ATE55944T1 (en) |
| BR (1) | BR8505332A (en) |
| DE (1) | DE3579411D1 (en) |
| ES (1) | ES8703764A1 (en) |
| IN (1) | IN164319B (en) |
| MX (1) | MX163967B (en) |
| PT (1) | PT81361B (en) |
-
1985
- 1985-10-08 AT AT85307193T patent/ATE55944T1/en not_active IP Right Cessation
- 1985-10-08 DE DE8585307193T patent/DE3579411D1/en not_active Expired - Lifetime
- 1985-10-10 IN IN845/DEL/85A patent/IN164319B/en unknown
- 1985-10-23 PT PT81361A patent/PT81361B/en not_active IP Right Cessation
- 1985-10-25 BR BR8505332A patent/BR8505332A/en not_active IP Right Cessation
- 1985-10-28 MX MX412A patent/MX163967B/en unknown
- 1985-10-31 KR KR1019850008118A patent/KR900003736B1/en not_active IP Right Cessation
- 1985-10-31 ES ES548444A patent/ES8703764A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IN164319B (en) | 1989-02-18 |
| KR900003736B1 (en) | 1990-05-30 |
| ATE55944T1 (en) | 1990-09-15 |
| BR8505332A (en) | 1986-08-05 |
| ES548444A0 (en) | 1987-03-01 |
| MX163967B (en) | 1992-07-07 |
| DE3579411D1 (en) | 1990-10-04 |
| PT81361A (en) | 1985-11-01 |
| ES8703764A1 (en) | 1987-03-01 |
| KR860003899A (en) | 1986-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC3A | Transfer or assignment |
Free format text: 931018 FOSECO INTERNATIONAL LTD. GB |
|
| TE3A | Change of address (patent) | ||
| MM3A | Annulment or lapse |
Free format text: LAPSE DUE TO NON-PAYMENT OF FEES Effective date: 19940731 |