GB1505286A - Polyisocyanate foam having isotropic cells and method and apparatus therefor - Google Patents
Polyisocyanate foam having isotropic cells and method and apparatus thereforInfo
- Publication number
- GB1505286A GB1505286A GB43901/75A GB4390175A GB1505286A GB 1505286 A GB1505286 A GB 1505286A GB 43901/75 A GB43901/75 A GB 43901/75A GB 4390175 A GB4390175 A GB 4390175A GB 1505286 A GB1505286 A GB 1505286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- walls
- foam
- mould
- opened out
- isotropic
- 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.)
- Expired
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
- B29C44/58—Moulds
- B29C44/586—Moulds with a cavity increasing in size during foaming
-
- 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
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/10—Applying counter-pressure during expanding
Landscapes
- Polyurethanes Or Polyureas (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
1505286 Moulding isotropic foams NIHON SOFLAN CHEMICAL & ENG CO Ltd 24 Oct 1975 [12 Sept 1975] 43901/75 Heading B5A A process for forming a polyisocyanate foam having an isotropic cell structure comprises allowing the foaming composition to rise freely and to spread out in at least one direction perpendicular to the free rising direction Z. The foam may be formed in a mould provided with walls which can be opened out to allow the foam to spread, e.g. hinged metal or plywood walls 3, as shown in Figs. 8, 9, walls having folds at the corners (Fig. 15, not shown), or throughout in a bellows construction (Figs. 13, 14, not shown). During foaming the walls may be opened out by a screw- or hydraulically operated arm 12 mounted on an outer frame or container 1. The latter may be provided with rollers 2 to facilitate mould removal. The mould may comprise a base-plate 4 having a wall spacer 5 and supported on cushioning material 9. Metal fittings 8 allow the walls 3 to be separated from one another. The walls 3 may be opened out in dependence upon the foaming height and/or velocity in the free rising direction Z. A pivotable or vertically movable contact detector 11 may be employed to initiate movement of the arm(s) 12. The foam may be formed as a plate, cube, or arcuate in cross-section and may comprise a polyurethane, a polyisocyanurate, a polycarbodiimide or a mixture of two or more thereof. Paper, plastics sheets, plywood, asbestos and metal laminates may be incorporated in the foam.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50111453A JPS5848338B2 (en) | 1975-09-12 | 1975-09-12 | Polyisocyanate Polyisocyanate Narabini Sonosouchi |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1505286A true GB1505286A (en) | 1978-03-30 |
Family
ID=14561594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB43901/75A Expired GB1505286A (en) | 1975-09-12 | 1975-10-24 | Polyisocyanate foam having isotropic cells and method and apparatus therefor |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5848338B2 (en) |
CA (1) | CA1048699A (en) |
DE (1) | DE2547549C3 (en) |
FR (1) | FR2323518A1 (en) |
GB (1) | GB1505286A (en) |
IT (1) | IT1043738B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4104346A (en) * | 1976-07-29 | 1978-08-01 | The Upjohn Company | Process for molding a substantially isotropic isocyanate-based polymer foam bun |
DE2929165C2 (en) * | 1979-07-19 | 1981-12-24 | Röhm GmbH, 6100 Darmstadt | Process for the production of a foam board |
JPS63160809A (en) * | 1986-12-25 | 1988-07-04 | Human Ind Corp | Batch type forming equipment for urethane foam slab |
DE102008007078B3 (en) * | 2008-01-31 | 2009-05-28 | Bayer Materialscience Ag | Method for discontinuously producing a block foam material e.g. polyurethane foam material, comprises introducing a container on a base of a molding box, and filling the container with reaction components and then removing the container |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5250060A (en) * | 1975-10-20 | 1977-04-21 | Kyowa Shinku Gijutsu Kk | Vacuum defreezing process for freezed substance and its apparatus |
-
1975
- 1975-09-12 JP JP50111453A patent/JPS5848338B2/en not_active Expired
- 1975-10-23 DE DE2547549A patent/DE2547549C3/en not_active Expired
- 1975-10-24 GB GB43901/75A patent/GB1505286A/en not_active Expired
- 1975-10-24 CA CA75238253A patent/CA1048699A/en not_active Expired
- 1975-10-28 FR FR7532971A patent/FR2323518A1/en active Granted
- 1975-10-29 IT IT28796/75A patent/IT1043738B/en active
Also Published As
Publication number | Publication date |
---|---|
JPS5848338B2 (en) | 1983-10-27 |
AU8596475A (en) | 1977-05-19 |
DE2547549A1 (en) | 1977-03-24 |
FR2323518B1 (en) | 1979-04-06 |
CA1048699A (en) | 1979-02-13 |
IT1043738B (en) | 1980-02-29 |
JPS5235296A (en) | 1977-03-17 |
DE2547549B2 (en) | 1978-09-21 |
FR2323518A1 (en) | 1977-04-08 |
DE2547549C3 (en) | 1979-05-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |