GB810008A - An improved process for shaping resinous materials - Google Patents
An improved process for shaping resinous materialsInfo
- Publication number
- GB810008A GB810008A GB1554556A GB1554556A GB810008A GB 810008 A GB810008 A GB 810008A GB 1554556 A GB1554556 A GB 1554556A GB 1554556 A GB1554556 A GB 1554556A GB 810008 A GB810008 A GB 810008A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slip
- cast
- mould
- sintered
- liquid
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3814—Porous moulds
-
- 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
- B29C41/16—Slip casting, i.e. applying a slip or slurry on a perforated or porous or absorbent surface with the liquid being drained away
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
Shaped articles are manufactured by pouring a fluid slip comprising or consisting essentially of a resin in liquid suspension into a porous mould which absorbs the liquid of the slip to leave a coherent cast which is then removed and sintered by heating. The slip preferably comprises an aqueous suspension of resin, e.g. polyvinyl chloride, polyethylene, or a polymerized hologenated ethylene, e.g. polytetrafluorethylene, containing a dispersing agent and a filler such as finely ground alumina or silica. If the suspension is rich in filler it may also contain a temporary binder, e.g. gum arabic, which is decomposed when the cast is sintered. The mould may be of plaster of Paris, and the absorption of liquid therein may be facilitated as by subjecting the slip to centrifugal force. The cast is preferably removed from the mould and dried before sintering it, and the mould surface may be coated with a release agent such as sodium alginate. A hollow cast of about 1/8 inch wall thickness and containing 30 per cent. by weight of polytetrafluorethylene and 70 per cent. of finely ground alumina may be sintered at 400 DEG C. for about 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1554556A GB810008A (en) | 1956-05-18 | 1956-05-18 | An improved process for shaping resinous materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1554556A GB810008A (en) | 1956-05-18 | 1956-05-18 | An improved process for shaping resinous materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB810008A true GB810008A (en) | 1959-03-04 |
Family
ID=10061039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1554556A Expired GB810008A (en) | 1956-05-18 | 1956-05-18 | An improved process for shaping resinous materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB810008A (en) |
-
1956
- 1956-05-18 GB GB1554556A patent/GB810008A/en not_active Expired
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