EP0065792B1 - Envelope for covering, during the casting stage, male mould pieces composed of several adjacent parts for casting ceramic sanitary appliances - Google Patents
Envelope for covering, during the casting stage, male mould pieces composed of several adjacent parts for casting ceramic sanitary appliances Download PDFInfo
- Publication number
- EP0065792B1 EP0065792B1 EP82200498A EP82200498A EP0065792B1 EP 0065792 B1 EP0065792 B1 EP 0065792B1 EP 82200498 A EP82200498 A EP 82200498A EP 82200498 A EP82200498 A EP 82200498A EP 0065792 B1 EP0065792 B1 EP 0065792B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- envelope
- casting
- separate portions
- fit together
- mould piece
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/261—Moulds therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
- B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
- B28B7/002—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps using magnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/20—Moulds for making shaped articles with undercut recesses, e.g. dovetails
Definitions
- Sanitary appliances in general are known to be produced inside suitable casting moulds which comprise a set of component mould pieces constructed of plaster of Paris, which are arranged to define a moulding cavity into which a material in the form of an aqueous suspension (slip) is then fed.
- suitable casting moulds which comprise a set of component mould pieces constructed of plaster of Paris, which are arranged to define a moulding cavity into which a material in the form of an aqueous suspension (slip) is then fed.
- moulds are widely used at the present time which enable projecting or undercut parts to be produced on the corresponding sanitary appliances.
- Said projecting or undercut parts for example an integral rim as heretofore described, are produced by making the "male” part of the mould, commonly known as the “piston”, in the form of several adjacent portions which are dismantled to enable the casting to be withdrawn.
- the respective sanitary appliances, on stripping the mould comprise small ribs which are created at the inevitable small gaps existing between the various separate portions which fit together, and between these latter and the respective mould pieces.
- the main object of the present invention is to provide simple and rational means for obviating these drawbacks.
- the invention proposes to prevent raised Iine S ⁇ forming at the junction lines between adjacent portions of the mould, on sanitary appliances in general during the casting of these latter.
- a covering element in the form of a thin walled envelope of pocket or sleeve configuration constructed of water-permeable elastic fabric and provided with at least one opening such that it can be mounted over and perfectly adheres to the corresponding mould piece which is to be protected.
- the proposed envelope is in the form of a floppy sleeve 1 of frusto-conical shape, open at both ends.
- Said frusto-conical shape is determined by the particular use of the invention, which as stated is for the compound piston of a mould designed for casting water closets with an integral rim.
- said sleeve can assume any shape as dictated by the particular configuration of the mould pieces with separate portions which fit together, to be covered.
- it can comprise only one mouth or opening, in which case it assumes the shape of a pocket or stocking.
- the sleeve 1 comprises a thin water-permeable wall of constant thickness constituted by a suitable permeable elastic fabric.
- Said fabric can for example be a natural or synthetic elasticated fabric of very dense mesh, for example a mesh of synthetic elastic fibres such as nylon, helance or the like.
- Each mouth of the frusto-conical sleeve 1 is bounded by a reinforced edge 2 which is also elastic.
- the described sleeve can be used for a mould of the type shown in Figures 2, 3 and 4, designed for moulding water closets with an integral rim.
- Said mould of known type, comprises a lower mould piece 3, two side mould pieces 4 to be placed on the lower mould piece to define a casting cavity, and upper mould piece 5 arranged to upperly close said casting cavity, and a rear mould piece 6 lying between the upper mould piece 5 and side mould pieces 4.
- the upper mould piece 5 is constituted by a central core 7, of which the central part is surrounded by a collar 8 of known type comprising a set of separate portions which fit together.
- the collar 8 is intended to mould the integral rim of the relative water closet, and is locked to the upper mould piece 5 by usual magnetic devices 9.
- the sleeve 1 can be separated from the still soft cast article, and be used for a subsequent casting operation after suitable cleaning.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Producing Shaped Articles From Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Finishing Walls (AREA)
- Thermistors And Varistors (AREA)
- Ceramic Products (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Pens And Brushes (AREA)
- Ink Jet (AREA)
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
Abstract
Description
- Sanitary appliances in general are known to be produced inside suitable casting moulds which comprise a set of component mould pieces constructed of plaster of Paris, which are arranged to define a moulding cavity into which a material in the form of an aqueous suspension (slip) is then fed.
- It is also well known that moulds are widely used at the present time which enable projecting or undercut parts to be produced on the corresponding sanitary appliances.
- This is so for example in the case of water closets, bidets and urinals with an integral rim.
- Said projecting or undercut parts, for example an integral rim as heretofore described, are produced by making the "male" part of the mould, commonly known as the "piston", in the form of several adjacent portions which are dismantled to enable the casting to be withdrawn.
- Because of the presence of said separate portions which fit together, the respective sanitary appliances, on stripping the mould, comprise small ribs which are created at the inevitable small gaps existing between the various separate portions which fit together, and between these latter and the respective mould pieces.
- Because said small ribs are normally found on an exposed surface of the cast article, for example on the inner surface of the bowl in the case of a water closet with an integral rim, it is obviously necessary to manually correct said imperfections in order to make the exposed surfaces for glazing perfectly smooth.
- In order to carry out said finishing operation, highly specialised personnel must be used because the operation is very deilicate and also difficult to effect, as the work must be carried out inside said cast articles.
- Consequently such finishing operations are very long and complicated, they increase the casting time for the finished articles, and heavily affect the costs and thus the profitability of the firm.
- The main object of the present invention is to provide simple and rational means for obviating these drawbacks.
- Basically, the invention proposes to prevent raised IineSÍforming at the junction lines between adjacent portions of the mould, on sanitary appliances in general during the casting of these latter.
- According to the invention, this is attained by a covering element in the form of a thin walled envelope of pocket or sleeve configuration constructed of water-permeable elastic fabric and provided with at least one opening such that it can be mounted over and perfectly adheres to the corresponding mould piece which is to be protected.
- This re-establishes the continuity of the moulding surface of that mould piece comprising separate portions which fit together, so as to prevent the formation of the undesirable raised lines on the surfaces of cast articles.
- The merits and characteristics of the invention will be more apparent from the description given hereinafter with reference to the accompanying figures, which show by way of non-limiting example an embodiment thereof suitable for moulds for casting water closets with an integral rim.
- Figure 1 is a perspective view of the envelope according to the invention.
- Figures 2 and 3 are two mutually orthogonal vertical sections through a mould for casting water closets with an integral rim, in which the upper mould piece is covered by the invention.
- Figure 4 is a perspective view of the same upper mould piece, but inverted.
- From the accompanying Figure 1 it can be seen that the proposed envelope is in the form of a floppy sleeve 1 of frusto-conical shape, open at both ends.
- Said frusto-conical shape is determined by the particular use of the invention, which as stated is for the compound piston of a mould designed for casting water closets with an integral rim.
- However, it is obvious that said sleeve can assume any shape as dictated by the particular configuration of the mould pieces with separate portions which fit together, to be covered.
- For example, it can comprise only one mouth or opening, in which case it assumes the shape of a pocket or stocking.
- The sleeve 1 comprises a thin water-permeable wall of constant thickness constituted by a suitable permeable elastic fabric.
- Said fabric can for example be a natural or synthetic elasticated fabric of very dense mesh, for example a mesh of synthetic elastic fibres such as nylon, helance or the like.
- Each mouth of the frusto-conical sleeve 1 is bounded by a
reinforced edge 2 which is also elastic. - The described sleeve can be used for a mould of the type shown in Figures 2, 3 and 4, designed for moulding water closets with an integral rim.
- Said mould, of known type, comprises a
lower mould piece 3, twoside mould pieces 4 to be placed on the lower mould piece to define a casting cavity, andupper mould piece 5 arranged to upperly close said casting cavity, and arear mould piece 6 lying between theupper mould piece 5 andside mould pieces 4. - Furthermore, the
upper mould piece 5 is constituted by acentral core 7, of which the central part is surrounded by acollar 8 of known type comprising a set of separate portions which fit together. - As is known, the
collar 8 is intended to mould the integral rim of the relative water closet, and is locked to theupper mould piece 5 by usualmagnetic devices 9. - As is clearly shown in Figure 4, before mounting the
upper mould piece 5 on to the mould, the sleeve 1 is mounted over this latter mould piece, and as it is taut it adheres perfectly to the moulding surface of thecore 7 andcollar 8. - By means of its two reinforced
end edges 2, it also engages securely with the outer upper edge of thecollar 8 and the perimetral edge of the free end of thecore 7. - This ensures the correct operative positioning of the invention during the casting stage, and its use ensures continuity of the moulding surfaces of that mould piece constituted by the
separate portions 8, so as to obviate the formation of the undesirable raised lines on the cast article in positions corresponding with the mould joining lines. - No description will be given of the mould assembly, the casting of the ceramic material and the withdrawal of the cast articles from the mould as these are well known normal operations.
- It will merely be stated that after extracting the
upper mould piece 5 and the constituent parts of thecollar 8, the sleeve 1 can be separated from the still soft cast article, and be used for a subsequent casting operation after suitable cleaning.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82200498T ATE14854T1 (en) | 1981-05-18 | 1982-04-27 | ENVELOPE FOR COVERING, DURING THE CASTING PHASE, OF MALE MOLDINGS COMPOSED OF SEVERAL ADJACENT PARTS FOR CASTING CERAMIC SANITARY PRODUCTS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT46843/81A IT1150408B (en) | 1981-05-18 | 1981-05-18 | ENVELOPE FOR COATING DURING THE STAGE PHASES, OF MALE PRINTING ELEMENTS COMPRISED FROM MULTIPLE PARTS, FOR THE CASTING OF SANITARY EQUIPMENT INCERAMICS |
IT4684381 | 1981-05-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0065792A2 EP0065792A2 (en) | 1982-12-01 |
EP0065792A3 EP0065792A3 (en) | 1983-08-10 |
EP0065792B1 true EP0065792B1 (en) | 1985-08-14 |
Family
ID=11259554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82200498A Expired EP0065792B1 (en) | 1981-05-18 | 1982-04-27 | Envelope for covering, during the casting stage, male mould pieces composed of several adjacent parts for casting ceramic sanitary appliances |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0065792B1 (en) |
AT (1) | ATE14854T1 (en) |
DE (1) | DE3265370D1 (en) |
IT (1) | IT1150408B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800004440A1 (en) * | 2018-04-12 | 2019-10-12 | METHOD OF PRODUCTION AND MOLD FOR THE REALIZATION OF ANY CERAMIC OBJECT FROM THE INTERNAL CAVITY EXCEEDING THE SUB-FRAME AND OBJECT SO OBTAINED |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1396882A (en) * | 1971-04-14 | 1975-06-11 | Spiroll Corp Ltd | Machine for manufacturing hollow structures of settable material for example concrete |
GB2027634A (en) * | 1978-08-09 | 1980-02-27 | Ideal Standard | Casting ceramic material |
-
1981
- 1981-05-18 IT IT46843/81A patent/IT1150408B/en active
-
1982
- 1982-04-27 EP EP82200498A patent/EP0065792B1/en not_active Expired
- 1982-04-27 AT AT82200498T patent/ATE14854T1/en not_active IP Right Cessation
- 1982-04-27 DE DE8282200498T patent/DE3265370D1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0065792A2 (en) | 1982-12-01 |
EP0065792A3 (en) | 1983-08-10 |
ATE14854T1 (en) | 1985-08-15 |
IT1150408B (en) | 1986-12-10 |
IT8146843A0 (en) | 1981-05-18 |
DE3265370D1 (en) | 1985-09-19 |
IT8146843A1 (en) | 1982-11-18 |
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