GB2176264A - Rollers - Google Patents
Rollers Download PDFInfo
- Publication number
- GB2176264A GB2176264A GB08524139A GB8524139A GB2176264A GB 2176264 A GB2176264 A GB 2176264A GB 08524139 A GB08524139 A GB 08524139A GB 8524139 A GB8524139 A GB 8524139A GB 2176264 A GB2176264 A GB 2176264A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roller
- annuli
- binder
- tube
- vermiculite
- 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
- 239000010455 vermiculite Substances 0.000 claims abstract description 21
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 21
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims description 16
- 239000010425 asbestos Substances 0.000 claims description 12
- 239000000047 product Substances 0.000 claims description 12
- 229910052895 riebeckite Inorganic materials 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000004111 Potassium silicate Substances 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000005357 flat glass Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005007 materials handling Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000704 physical effect Effects 0.000 claims description 2
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 2
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- 238000009747 press moulding Methods 0.000 claims description 2
- 238000006748 scratching Methods 0.000 claims description 2
- 230000002393 scratching effect Effects 0.000 claims description 2
- 150000004760 silicates Chemical class 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
- F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/02—Adaptations of individual rollers and supports therefor
- B65G39/04—Adaptations of individual rollers and supports therefor the rollers comprising a number of roller forming elements mounted on a single axle
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
- C03B35/181—Materials, coatings, loose coverings or sleeves thereof
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
- Tunnel Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The working surface of a roller primarily intended for the handling of sheet material at a relatively high temperature and/or wherein the surface finish may be easily damaged, is constituted by expanded vermiculite particles.
Description
SPECIFICATION
Improvements in and relating to- materials handling
Field of the invention
The invention relates to the handling of sheet materials. In particular, it is concerned with rollers for forwarding and/or handling sheet materials at elevated temperatures.
Prior art
Both sheet glass and sheet steel production processes are carried out at elevated temperatures. For example, sheet steel may emerge from an annealing furnace at up to 1000"C.
In addition to this, both glass and steel, such as highly polished stainless steel, are vulnerable to surface scratching, especially when hot. Accordingly, the surface properties and heat resistances of conveyor rollers are extremely important indeed.
It is common practice to make rolls for such use from an asbestos paper or board product, by cutting out a large number of annuli and assembling them side-by-side to make a tube.
This tube is then compressed axially whilst on a mandrel, prior to clamping up to form a roller with an asbestos surface. This latter is ground and/or polished to produce a finished roller.
Asbestos is a particularly preferred material for this because it has good thermal properties allied to a degree of softness such that little or no damage is caused to the sheet product passing over it.
It has been proposed to replace asbestos paper/board in this application by non-asbestos paper/board. It has also been proposed to use a roller with a ceramics surface. However, non asbestos papers/boards prove to have a limited life at the temperatures usually encountered. Ceramic fares very much better, but is too abrasive for most applications.
Disclosure of the invention
In its broadest aspect, the invention comprises a roller whose working surface is constituted by expanded (exfoliated) vermiculite particles. "Working surface" means all that part of the roller surface which sheet material may contact in passage over the roller.
It is particularly preferred that the roller should comprise a plurality of annuli moulded or formed from vermiculite and assembled together side-by-side to form a tube. This tube is preferably mounted on a supporting mandrel provided with clamping means for locating and retaining the annuli.
The annuli are preferably moulded or formed from expanded vermiculite particles, optionally in admixture with a binder.
The annuli may be made by press mouldings which facilitates good control of the product density and whilst the surface finish of press moulded products is good, it will usually be necessary to apply a light grinding treatment to the roller surface before use. This is in order to compensate for any dimensional and/or locational errors between the individual annuli when assembled as a tube.
Sufficient product integrity can usually be achieved simply by pressing vermiculite particles together. However, if even greater integrity is desired then the vermiculite can be mixed with a sodium silicate binder, the latter constituting about 5% by weight of the final product. However, other particle sizes and/or binder proportions may be used to meet the requirements of a particular end use.
As is well-known there are at least two ways of producing expanded vermiculite; these may be broadly described as the thermal method and the electrolytic method. The end products have very different physical properties and in the case of the latter method, the product exhibits better structural integrity in response to pressing in the absence of a binder.
If a binder is used, it is preferably capable of withstanding high temperatures. Water-soluble silicates are particular preferred; sodium silicate can be used to at least 8000C and potassium silicate at even higher temperatures.
Expanded vermiculite is available in several grades, good results have been achieved by use of a relatively course grade, with an average particle size of the order of 5-7 mm.
1. A roller having a working surface (as defined) constituted by expanded (exfoliated) vermiculite particles.
2. A roller according to Claim 1 comprising a pluralility of annuli of vermiculite assembled together side-by-side to form a tube.
3. A roller according to Claim 2 wherein the tube is mounted on a supporting mandrel provided with clamping means for locating and retaining the annuli.
4. A roller according to any preceding
Claim wherein the annuli are moulded or formed from a mix of expanded vermiculite particles and binder.
5. A roller according to any preceding
Claim wherein the binder is a water-soluble silicate.
6. A roller according to Claim 4 or Claim 5 wherein the binder constitutes up to about 10% by weight of the final product.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (6)
1. A roller having a working surface (as defined) constituted by expanded (exfoliated) vermiculite particles.
2. A roller according to Claim 1 comprising a pluralility of annuli of vermiculite assembled together side-by-side to form a tube.
3. A roller according to Claim 2 wherein the tube is mounted on a supporting mandrel provided with clamping means for locating and retaining the annuli.
4. A roller according to any preceding
Claim wherein the annuli are moulded or formed from a mix of expanded vermiculite particles and binder.
5. A roller according to any preceding
Claim wherein the binder is a water-soluble silicate.
6. A roller according to Claim 4 or Claim 5 wherein the binder constitutes up to about 10% by weight of the final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP86303808A EP0205263A1 (en) | 1985-06-08 | 1986-05-20 | Improvements in and relating to materials handling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB858514552A GB8514552D0 (en) | 1985-06-08 | 1985-06-08 | Materials handling |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8524139D0 GB8524139D0 (en) | 1985-11-06 |
| GB2176264A true GB2176264A (en) | 1986-12-17 |
| GB2176264B GB2176264B (en) | 1989-07-26 |
Family
ID=10580430
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB858514552A Pending GB8514552D0 (en) | 1985-06-08 | 1985-06-08 | Materials handling |
| GB08524139A Granted GB2176264A (en) | 1985-06-08 | 1985-10-01 | Rollers |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB858514552A Pending GB8514552D0 (en) | 1985-06-08 | 1985-06-08 | Materials handling |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS61295917A (en) |
| GB (2) | GB8514552D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5352863A (en) * | 1992-04-03 | 1994-10-04 | Minnesota Mining And Manufacturing Company | Flat bed thermophotographic film processor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484495B (en) * | 2020-11-30 | 2022-04-22 | 荆州斯米克新材料有限公司 | Vermiculite high-temperature expansion device and expansion method |
-
1985
- 1985-06-08 GB GB858514552A patent/GB8514552D0/en active Pending
- 1985-10-01 GB GB08524139A patent/GB2176264A/en active Granted
-
1986
- 1986-06-06 JP JP13046686A patent/JPS61295917A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5352863A (en) * | 1992-04-03 | 1994-10-04 | Minnesota Mining And Manufacturing Company | Flat bed thermophotographic film processor |
| US5665257A (en) * | 1992-04-03 | 1997-09-09 | Minnesota Mining And Manufacturing Company | Flat bed thermophotographic film processor |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2176264B (en) | 1989-07-26 |
| GB8524139D0 (en) | 1985-11-06 |
| JPS61295917A (en) | 1986-12-26 |
| GB8514552D0 (en) | 1985-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |