GB670051A - Improvements in the production of liners for centrifugal pumps - Google Patents
Improvements in the production of liners for centrifugal pumpsInfo
- Publication number
- GB670051A GB670051A GB2236549A GB2236549A GB670051A GB 670051 A GB670051 A GB 670051A GB 2236549 A GB2236549 A GB 2236549A GB 2236549 A GB2236549 A GB 2236549A GB 670051 A GB670051 A GB 670051A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- mould
- liner
- plate
- sections
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/049—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp
-
- 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
- B29K2021/00—Use of unspecified rubbers as moulding material
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
670,051. Moulding liners for centrifugal pumps. LOOI, G. E. Nov. 29, 1950 [Aug. 29, 1949], No. 22365/49. Class 87(ii) Apparatus for producing liners for centrifugal pumps comprises a collapsable core a upon which the liner is to be formed, means upon which the core is mounted, and a vulcanizing mould z<SP>1</SP>, z<SP>2</SP> within which the said means are supported so that the core is held in spaced relation to the inner surface of the mould, whereby pressure due to the weight of the core upon the liner during its vulcanization is avoided. In the embodiment described, the annular core is divided radially and tangentially into seven sections and each section comprises three parts, outer portions c, d which are hollow aluminium castings and an inner wedge portion e which is a solid aluminium casting. A neck portion is similar, comprising outer portions i, j, and an inner wedge portion k. The portions of each section are bolted together by bolts f, and the sections are then bolted together by bolts 8. The core is collapsed by unscrewing the bolts from inside the annulus and drawing the wedges inwards, their thick ends facing inwards to allow this. The rest of the sections, including those of, the neck portions can then be dismantled. The core is supported by being clamped between end-plates o, p mounted on a shaft s, the lower end-plate p resting on the shoulder of a head t on the shaft sand a nut w, with radiating arms w<SP>1</SP>, threaded on the shaft s, being tightened down on the upper end-plate o. End-plate p has a flange q which seats in a co-acting recess formed in the outer portions d of the core sections, whilst end-plate o has a shallow boss r fitting within the circular opening formed at the top of the core by the outer portions c of the core sections. The lower plate p has a boss u which seats in a recess in the vulcanizing mould and the upper plate o has a boss 14 which fits an opening 13 in the mould, in which the core is thus held so that it is spaced from the inner surface of the mould. The two halves z<SP>1</SP> and z<SP>2</SP> of the mould, upper and lower, are clamped together by long bolts 15 pivoted at 16 to the bottom half z<SP>2</SP>. Each half of the mould has a space 23 for the passage of steam. To form the liner, sheet rubber is applied around the core in layers, cemented by rubber gum and, including, optionally, intermediate layers of canvas. The end-plates o, p have shoulders x of depth corresponding to the thickness of liner required, that on the plate o being tapered to provide a conical seating for the door of the liner. A frame of wire or metal strip, to add rigidity, built up of concentric circles with radial spacers, may be covered with rubber and placed outside the liner after it has been built upon the core and before vulcanization. The core, with the unvulcanized liner y on it, is slung by means of the loop s' and lowered into the bottom half z<SP>2</SP> of the mould until the boss u seats in its recess. A flat base portion may be provided upon which the mould may stand in the vertical plane instead of lying flat.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2236549A GB670051A (en) | 1949-08-29 | 1949-08-29 | Improvements in the production of liners for centrifugal pumps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2236549A GB670051A (en) | 1949-08-29 | 1949-08-29 | Improvements in the production of liners for centrifugal pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB670051A true GB670051A (en) | 1952-04-09 |
Family
ID=10178200
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2236549A Expired GB670051A (en) | 1949-08-29 | 1949-08-29 | Improvements in the production of liners for centrifugal pumps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB670051A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113043547A (en) * | 2021-04-19 | 2021-06-29 | 安徽凯特泵业有限公司 | Forming die of pump body |
-
1949
- 1949-08-29 GB GB2236549A patent/GB670051A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113043547A (en) * | 2021-04-19 | 2021-06-29 | 安徽凯特泵业有限公司 | Forming die of pump body |
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