GB2193905A - Filter sleeves - Google Patents
Filter sleeves Download PDFInfo
- Publication number
- GB2193905A GB2193905A GB08619997A GB8619997A GB2193905A GB 2193905 A GB2193905 A GB 2193905A GB 08619997 A GB08619997 A GB 08619997A GB 8619997 A GB8619997 A GB 8619997A GB 2193905 A GB2193905 A GB 2193905A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- filter
- sleeve
- cloth
- bonding agent
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000007767 bonding agent Substances 0.000 claims abstract description 14
- 239000004744 fabric Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000006698 induction Effects 0.000 claims abstract description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 4
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 229920003051 synthetic elastomer Polymers 0.000 claims description 2
- 239000005061 synthetic rubber Substances 0.000 claims description 2
- 239000012815 thermoplastic material Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002889 sympathetic effect Effects 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
- B29C65/3608—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
- B29C65/3612—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—Making filtering elements
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
- B29C66/612—Making circumferential joints
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
- B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
- B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2012/00—Frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/737—Articles provided with holes, e.g. grids, sieves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A filter sleeve of cloth is attached to an end ring, which is made of a thermoplastic, by a layer of bonding agent interposed between the cloth and ring and comprising a mixture of thermoplastic material and a ferrous metal powder which is fused to bond by induction heating, so that the heating is concentrated in the metal powder and this avoids risk of damage to the cloth or ring. The cloth can be located in a groove in the ring or on a flange thereof. The sleeve serves as a component in a tube filter press.
Description
SPECIFICATION
Filter sleeves
This invention relates to filter sleeves of the kind comprising a relatively rigid ring which is for attachment to an inlet or outlet tubular component of a filter press or the like, with a filter cloth in the form of a tube or sleeve, fixed to the ring and extending axially therefrom.
The problem is to get a satisfactory connection between the filter cloth and the ring.
Known methods include wrapping the cloth around the ring and relatively complex sewing operations.
According to the invention, the ring and filter cloth are bonded together with a thermoplastic bonding agent located between the two, the agent being mixed with a ferrous metal powder, and induction heating being used to fuse the agent to the components.
The ring may be made of moulded rubber, synthetic rubber or plastics material, including the possibility of using a thermoplastic which can be effectively welded by the induction heating process, without risk of damage, because the heating effect is confined to the bonding agent where the metal powder acts as a susceptor.
By the term induction heating is meant the use of (primarily) radio-frequencies which act to heat the metal powder.
The ferrous metal powder may be for example iron oxide or a stainless steel powder. The particle size will be between 10's mesh and 400's mesh. The particle size is chosen accordng to the frequency range of the induction heater. The higher is the frequency, the smaller the particles need to be.
The proportions of metal powder used will be between 1% and 50% by volume of the bonding agent.
The bonding agent is essentially one sympathetic to the components. Conveniently it is of the same material as the filter cloth, where possible. For example where a polypropylene filter cloth is employed, the bonding agent may itself be polypropylene, and so on.
The bonding agent may be a sheet, or foil or strand with the metal powder distributed therein made for example by hot rolling an extruded mixture or extruding the thermopiastic or metal powder.
Matched dies are unnecessary with the invention to effect the bonding operation, because the heating effect originates in the bonding agent rather than being by conduction from the dies. The bonding agent can cool naturally when the induction heater is switched off, and high pressure is unnecessary to hold the parts together.
The invention is particularly convenient in enabling thermoplastic rubbers to be used as
preformed mouldings. By the use of the invention sewing can be completely eliminated, thus leaving stronger and more accurately assembled filter sleeves with substantial elimination of the possibility of leakage around the connection between the ring and sleeve.
In one possibility, the ring is made with a flange to extend a short distance into the sleeve and filter cloth, a length of tape-like bonding agent is wound about the flange, and the wound flange is inserted into the end of the tubular sleeve and filter cloth.
In another possibility, the ring is provided with an axially extending annular slot, the sleeve is inserted into that slot, and the bonding agent in the form of a mixture of fine particles of the thermoplastic material with the ferrous metal powder is packed into the slot.
In either case, the induction heating effect can be provided by a ring-like heater into which the assembly is located, or by a mandrel-like heater which is inserted through the ring. In either case a complementary metal reflector may be employed: where the ring-like heater is used, the reflector will be in the form of a mandrel inserted into the ring, and where the heater is in the form of a mandrel, the reflector may be in the form of a metal ring through which the assembly is inserted.
The rubber or plastics (for example) ring may be provided with a snap ring in the form of a stainless steel or the like, which may be assembled to the rubber or plastics component after the induction heating step. Alternatively, such a metal snap ring may be axially spaced from the portion of the rubber or plastics ring which is to be attached to the filter sleeve, relying upon the localised induction heating effect to avoid risk of damage to the rubber or plastics component due to the assembled snap ring.
Claims (6)
1. A filter sleeve comprising a relatively rigid ring and a tube or sleeve of filter cloth which are bonded together with a thermoplastic bonding agent located between the two, the agent being mixed with a ferrous metal powder, and induction heating being used to fuse the agent to the components.
2. A filter as claimed in claim 1 wherein the ring is made of moulded rubber, synthetic rubber or plastics material.
3. A filter as claimed in claim 1 or 2 wherein the bonding agent is a sheet, foil or strand with the metal powder distributed therein.
4. A filter as claimed in any of claims 1-3 wherein the ring has a flange extending a
short distance into the sleeve of cloth.
5. A filter as claimed in claim 1 or 2 wherein the ring as an axially extending slot, the sleeve extends into the slot, and the
bonding agent is in the form of a mixture of
particles packed into the slot.
6. A filter sleeve constructed and made by the methods substantially as described in the accompanying specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8619997A GB2193905B (en) | 1986-08-16 | 1986-08-16 | Filter sleeves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8619997A GB2193905B (en) | 1986-08-16 | 1986-08-16 | Filter sleeves |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8619997D0 GB8619997D0 (en) | 1986-09-24 |
| GB2193905A true GB2193905A (en) | 1988-02-24 |
| GB2193905B GB2193905B (en) | 1990-08-08 |
Family
ID=10602822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8619997A Expired - Lifetime GB2193905B (en) | 1986-08-16 | 1986-08-16 | Filter sleeves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2193905B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2698286A1 (en) * | 1992-11-11 | 1994-05-27 | Pall Corp | Filter element, its manufacturing process and apparatus for implementing this process. |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB741918A (en) * | 1951-11-19 | |||
| GB879781A (en) * | 1957-07-01 | 1961-10-11 | Electrolux Ltd | Improved dust filter bag for vacuum cleaners |
| GB966235A (en) * | 1961-06-22 | 1964-08-06 | Dust Control Equipment Ltd | Improvements in and relating to gas filtering apparatus |
| GB1201841A (en) * | 1967-01-06 | 1970-08-12 | Philips Nv | Vacuum-cleaner |
| GB1319459A (en) * | 1970-01-21 | 1973-06-06 | Grace W R & Co | Production of filter elements |
| GB1331417A (en) * | 1971-01-29 | 1973-09-26 | Air Filters Inc | Coupling for a dust collecting filter bag employed in air filters |
| GB2152399A (en) * | 1984-01-03 | 1985-08-07 | Hr Textron Inc | Filter element |
-
1986
- 1986-08-16 GB GB8619997A patent/GB2193905B/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB741918A (en) * | 1951-11-19 | |||
| GB879781A (en) * | 1957-07-01 | 1961-10-11 | Electrolux Ltd | Improved dust filter bag for vacuum cleaners |
| GB966235A (en) * | 1961-06-22 | 1964-08-06 | Dust Control Equipment Ltd | Improvements in and relating to gas filtering apparatus |
| GB1201841A (en) * | 1967-01-06 | 1970-08-12 | Philips Nv | Vacuum-cleaner |
| GB1319459A (en) * | 1970-01-21 | 1973-06-06 | Grace W R & Co | Production of filter elements |
| GB1331417A (en) * | 1971-01-29 | 1973-09-26 | Air Filters Inc | Coupling for a dust collecting filter bag employed in air filters |
| GB2152399A (en) * | 1984-01-03 | 1985-08-07 | Hr Textron Inc | Filter element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2698286A1 (en) * | 1992-11-11 | 1994-05-27 | Pall Corp | Filter element, its manufacturing process and apparatus for implementing this process. |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2193905B (en) | 1990-08-08 |
| GB8619997D0 (en) | 1986-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |