FR1604824A - Rotational casting of two thermoplastic polymers into - hollow mouldings - Google Patents
Rotational casting of two thermoplastic polymers into - hollow mouldingsInfo
- Publication number
- FR1604824A FR1604824A FR1604824DA FR1604824A FR 1604824 A FR1604824 A FR 1604824A FR 1604824D A FR1604824D A FR 1604824DA FR 1604824 A FR1604824 A FR 1604824A
- Authority
- FR
- France
- Prior art keywords
- mould
- polymers
- pvc
- nylon
- effected
- 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
- 238000000465 moulding Methods 0.000 title 1
- 238000010106 rotational casting Methods 0.000 title 1
- 229920001169 thermoplastic Polymers 0.000 title 1
- 229920000642 polymer Polymers 0.000 abstract 5
- -1 polypropylene Polymers 0.000 abstract 3
- 239000004677 Nylon Substances 0.000 abstract 2
- 239000004698 Polyethylene Substances 0.000 abstract 2
- 230000008018 melting Effects 0.000 abstract 2
- 238000002844 melting Methods 0.000 abstract 2
- 229920001778 nylon Polymers 0.000 abstract 2
- 229920000573 polyethylene Polymers 0.000 abstract 2
- 238000005245 sintering Methods 0.000 abstract 2
- 229920002292 Nylon 6 Polymers 0.000 abstract 1
- 239000004743 Polypropylene Substances 0.000 abstract 1
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229920000098 polyolefin Polymers 0.000 abstract 1
- 229920001155 polypropylene Polymers 0.000 abstract 1
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The two polymers have different m.pts. and they are charged as powders or granules into a rotational mould which is rotated and held at a temperature above the m.pt. of one of the polymers but below the m.pt. of the other to form an outer continuous skin of the lower melting polymer. The mould is then raised to a temperature above the m.pt. of the higher melting polymer for a time sufficient to complete the sintering of the polymers a reservoir of unsintered particles being held at the lowest point of the mould until complete sintering is effected. Heating of the mould is pref. effected by an oil jacket or by spraying a hot liquid, e.g. a molten salt, on to it. Suitable thermoplasts include polyolefins e.g. polypropylene, nylon, e.g. nylon 6, polyvinyl compounds and cellulose acetate butyrate and suitable combinations are (1) polyethylene and polyaminoundecanoamide, (iii) PVC and PVOH, (III) PVC and nylon, and (iv) PVC and polyethylene.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5496466A GB1190379A (en) | 1966-12-08 | 1966-12-08 | Moulding Plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1604824A true FR1604824A (en) | 1972-04-17 |
Family
ID=10472584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1604824D Expired FR1604824A (en) | 1966-12-08 | 1967-12-07 | Rotational casting of two thermoplastic polymers into - hollow mouldings |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1604824A (en) |
| GB (1) | GB1190379A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0477478U (en) * | 1990-11-19 | 1992-07-07 | ||
| FR2813232A1 (en) * | 2000-08-30 | 2002-03-01 | Commissariat Energie Atomique | PROCESS FOR PRODUCING A ROTOMOLDING REVOLUTION PIECE AND PART OBTAINED |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPN928196A0 (en) * | 1996-04-16 | 1996-05-09 | Linpac Polycast Pty Ltd | Rotational moulding process |
| US6180203B1 (en) | 1997-04-09 | 2001-01-30 | Peter J. Unkles | Rotational moulding process |
| ATE554924T1 (en) * | 2002-11-21 | 2012-05-15 | Total Petrochemicals Res Feluy | MULTI-LAYER ROTARY MOLDING |
-
1966
- 1966-12-08 GB GB5496466A patent/GB1190379A/en not_active Expired
-
1967
- 1967-12-07 FR FR1604824D patent/FR1604824A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0477478U (en) * | 1990-11-19 | 1992-07-07 | ||
| FR2813232A1 (en) * | 2000-08-30 | 2002-03-01 | Commissariat Energie Atomique | PROCESS FOR PRODUCING A ROTOMOLDING REVOLUTION PIECE AND PART OBTAINED |
| WO2002018117A1 (en) * | 2000-08-30 | 2002-03-07 | Commissariat A L'energie Atomique | Method for making a part with clearance volume by rotational moulding and resulting part |
| US7247268B2 (en) | 2000-08-30 | 2007-07-24 | Commissariat A L'energie Atomique | Method for making a part with clearance volume by rotational moulding and resulting part |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1190379A (en) | 1970-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |