GB2047621A - Improvement in or relating to conveyor belts - Google Patents
Improvement in or relating to conveyor belts Download PDFInfo
- Publication number
- GB2047621A GB2047621A GB8010507A GB8010507A GB2047621A GB 2047621 A GB2047621 A GB 2047621A GB 8010507 A GB8010507 A GB 8010507A GB 8010507 A GB8010507 A GB 8010507A GB 2047621 A GB2047621 A GB 2047621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cord
- belt
- cords
- elastomeric material
- bunches
- 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
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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
- B29C70/202—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres arranged in parallel planes or structures of fibres crossing at substantial angles, e.g. cross-moulding compound [XMC]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D29/00—Producing belts or bands
- B29D29/06—Conveyor belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
-
- 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
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
- B65G15/32—Belts or like endless load-carriers made of rubber or plastics
- B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric
- B65G15/36—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric the layers incorporating ropes, chains, or rolled steel sections
-
- 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
-
- 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
- B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
- B29L2031/7092—Conveyor belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2433/00—Closed loop articles
- B32B2433/02—Conveyor belts
-
- 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
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/06—Articles and bulk
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Belt Conveyors (AREA)
- Laminated Bodies (AREA)
Abstract
A conveyor belt (1) made of elastomeric material having embedded therein a longitudinally extending load carrying insert (2) and transversely extending cord bunches (3). The cord bunches (3) are spaced relative to one another in the longitudinal direction of the belt (1) and prevent any split in the belt (1) extending longitudinally along the length of the belt (1). Each cord (4) of a cord bunch (3) is formed from a plurality of twisted yarns (12) which are spaced apart to present an undulating surface thereby facilitating the penetration of the elastomeric material of the belt into the interstices between the yarns (12) and improving the anchorage of the cord (4) in the belt. The yarns (12) preferably have a high degree of twist so that the cords (4) are extensible to allow troughing of the belt (1) when carrying material. <IMAGE>
Description
SPECIFICATION
Improvement in or relating to conveyor belts
The present invention concerns improvements in or relating to conveyor belts and more particularly to a conveyor belt provided with means that prevent any accidental splitting of the conveyor belt extending longitudinally along the length of the belt.
Conveyor belts are known which are provided with means for preventing such splits from running longitudinally along the length of the belt.
The known conveyor belts of this type consist of a layer of elastomeric material in which is embedded a plurality of cords extending longitudinally of the belt to from a load carrying insert and plurality of cord bunches extending transversely of the belt and spaced intervals from each other in the longitudinal direction of the belt to prevent any split in the belt extending longitudinally along the length of the belt. The cords forming the load carrying insert are both parallel and coplanar to one another and the cords of each bunch are also parallel and coplanar to one another.
These known conveyor belts have numerous drawbacks. A first drawback is that the conveyor belts have an uneven distribution of the load-carrying insert due to the cords forming the insert not being perfectly parallel to one another, expecially in the regions of the belt ecdges.
Another drawback of the known conveyor belts is the problem of adapting them to the rollers for supporting the belt in the zone where the belt assumes a concave or troughed configuration in transverse cross-section when supporting the material to be transported.
A further drawback of the known conveyor belts is that of separation of the cords forming the cord bunches.
The above-described drawbacks result in an unsatisfactory service life of such known conveyor belts.
An object of the present invention is to reduce the above-described drawbacks so as to provide a conveyor belt that has an even distribution, at every point, of the cords forming the load-carrying insert, that is well adapted to the rollers for supporting the belt, and moreover, that does not present any separation of the cords forming the transverse cord bunches and which, as a consequence, has an improved service life.
According to the present invention a conveyor belt comprises a belt made of elastomeric material having embedded therein a loadcarrying insert comprising a plurality of parallel and coplanar cords extending in the longitudinal direction of the belt and a plurality of cord bunches extending transversely of the belt and spaced at intervals from each other in the longitudinal direction of the belt, the cords of each cord bunch having their axes parallel and coplanar to one another and each cord of cord bunch comprising a plurality of twisted yarns arranged so that the yarns are spaced apart and the cord presents an undulated surface.
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawing wherein:
Figure 1 is a plan view of part of a conveyor belt according to the present invention;
Figure 2 is a section, to an enlarged scale, along the line Il-Il of Fig. 1; and
Figure 3 is a cross-section of a cord of a transversely extending cord bunch.
The conveyor belt shown in the accompanying drawing comprises a belt 1 made of an elastomeric material having embedded therein a load-carrying insert comprising a plurality of flexible and inextensible cords 2 extending longitudinally of the belt. The cords are both parallel and coplanar to one another.
Also embedded in the elastomeric material of the belt are a plurality of cord bunches 3 extending transversely of the belt and spaced at intervals from each other in the longitudinal direction of the belt. The cords 4 forming each cord bunch 3 are parallel and coplanar to one another and extend transversely of the belt at an acute angle 5 with respect to the longitudinal direction of the belt.
Both the cords 2 and the cords 4 are preferably comprised of steel wires although other materials may be used as, for example, polyamides, polyesters, aromatic polyamides and the like.
As shown in transverse cross-section in Fig.
2 the belt 1 comprises a plurality of doubledup and closely joined together layers.
More particularly, starting from the upper surface 6 (which is the load carrying surface) the belt comprises a layer 7 of elastomeric material, a layer 8 of elastomeric material in which the cords 2 are embedded, i.e. the cords forming the load carrying insert, an interpositioning layer 9 of elastomeric material and a layer 10 of elastomeric material which incorporates on that face which contacts the layer 9 the cord bunches 3.
The elastomeric material forming the layer 7 is of a per se known composition capable of resisting the abrasions resulting from the mechanical action originated when transporting materials. The elastomeric material forming the layer 8 is of a per se known composition suitable for joining together the adjacent layers 7, 9 and also for embedding the cords 2.
The elastomeric material forming the layer 10 is also of a per se known composition capable of resisting the mechanical action exercised on the lower surface 11 of the belt by the support rollers.
The particular construction of the cords 4 forming the cord bunches 3 is shown in more detail in Fig. 3 from which it will be seen that each cord 4 comprises four twisted yarns 12.
Each cord 4 presents an external undulated surface due to the twisted yarns 12 forming the cord having their external surfaces spaced apart, i.e. not contracting one another. It will be understood that the number of twisted yarns forming the cords 4 may be varied and the invention is not restricted to cords comprising four twisted yarns.
Referring to Fig. 2 the ratio between the diameter 13 of the cords 2 and the diameter 14 of the cords 4 is comprised between 5 and 1.5. The ratio between the thickness 15 of the elastomeric material interposed between the cords 2 and the cords 4 and the diameter of the cords 4 is comprised between 0.8 and 1.
The cords having the above-described configurations ensure a correct distribution of the load-carrying insert - i.e. a perfect coplanarity and perfect parallelism of the cords 2.
The particular structure of the cords 4 is obtained by means of yarns having a high degree of twist so that the cords 4 have a considerable elasticity. As a result the presence of the cord bunches 3 ensures the conveyor belt has a deformability in the direction transverse to the longitudinal axis of the belt so as to allow the belt to assume the concave or troughed configuration as necessary and to rest properly upon the support rollers.
Moreover the particular configuration of the cords 4 enables the elastomeric material to penetrate easily into the interstices existing between the twisted yarns 12 forming each cord 4 so that the cords 4 are embedded securely in the elastomeric material. As a result any separation of the cord bunches from the conveyor belt is avoided.
It will be appreciated from the foregoing that the construction of the conveyor belt according to the present invention substantially reduces the afore-described drawbacks of the known conveyor belts with the result that the conveyor belt of the present invention has an improved service life as compared with the known belts.
Claims (7)
1. A conveyor belt comprising a belt made of elastomeric material having embedded therein a load carrying insert comprising a plurality of parallel and coplanar cords extending in the longitudinal direction of the belt and a plurality of cord bunches extending transversely of the belt and spaced at intervals from each other in the longitudinal direction of the belt, the cords of each cord bunch having their axes parallel and coplanar to one another and each cord of a cord bunch comprising a plurality of twisted yarns arranged so that the yarns are spaced apart and the cord presents an undulated surface.
2. A conveyor belt according to claim 1 wherein the ratio between the diameter of the cors forming the load carrying insert and the diameter of the cords of the cord bunches is comprised between 5 and 1.5.
3. A conveyor belt according to claim 1 or claim 2 wherein the ratio between the thickness of the elastomeric material between the cords of the load carrying insert and the cords of the cord bunches and the diameter of the cords of the cord bunches is comprised between 0.8 and 1.
4. A conveyor belt according to any one of the preceding claims wherein the belt is formed by a plurality of layers of elastomeric material.
5. A conveyor belt according to claim 4 wherein the layer which in use provides the load bearing surface is made of abrasion resistant elastomeric material.
6. A conveyor belt according to any one of the preceding claims wherein each cord of a cord bunch is formed by four twisted yarns.
7. A conveyor belt substantially as hereinbefore described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT22095/79A IT1165042B (en) | 1979-04-24 | 1979-04-24 | CONVEYOR BELT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2047621A true GB2047621A (en) | 1980-12-03 |
| GB2047621B GB2047621B (en) | 1983-05-18 |
Family
ID=11191417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8010507A Expired GB2047621B (en) | 1979-04-24 | 1980-03-28 | Conveyor belts |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS55159974A (en) |
| AR (1) | AR222868A1 (en) |
| DE (1) | DE3015656A1 (en) |
| ES (1) | ES491452A0 (en) |
| FR (1) | FR2454984B1 (en) |
| GB (1) | GB2047621B (en) |
| HU (1) | HU180344B (en) |
| IT (1) | IT1165042B (en) |
| RO (1) | RO82090A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5978004A (en) * | 1982-10-25 | 1984-05-04 | Bando Chem Ind Ltd | Nonviscous steel cord conveyor belt |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR69330E (en) * | 1956-03-26 | 1958-10-23 | Kleber Colombes | Improvements to bands in reinforced elastic material |
| FR1299990A (en) * | 1961-09-11 | 1962-07-27 | Continental Gummi Werke Ag | Conveyor belt |
| GB1240123A (en) * | 1967-11-15 | 1971-07-21 | Btr Industries Ltd | Improvements in conveyor belting |
| FR1603133A (en) * | 1968-07-08 | 1971-03-22 | ||
| BE792782A (en) * | 1971-12-17 | 1973-03-30 | Pirelli | CONVEYOR TAPE |
| DE2557025A1 (en) * | 1975-12-18 | 1977-06-23 | Continental Gummi Werke Ag | CONVEYOR BELT |
-
1979
- 1979-04-24 IT IT22095/79A patent/IT1165042B/en active
-
1980
- 1980-03-28 GB GB8010507A patent/GB2047621B/en not_active Expired
- 1980-04-21 FR FR8008869A patent/FR2454984B1/en not_active Expired
- 1980-04-23 HU HU80801011A patent/HU180344B/en unknown
- 1980-04-23 DE DE19803015656 patent/DE3015656A1/en not_active Withdrawn
- 1980-04-24 RO RO80100941A patent/RO82090A/en unknown
- 1980-04-24 ES ES491452A patent/ES491452A0/en active Granted
- 1980-04-24 JP JP5482580A patent/JPS55159974A/en active Pending
- 1980-04-24 AR AR280789A patent/AR222868A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE3015656A1 (en) | 1980-11-06 |
| IT1165042B (en) | 1987-04-22 |
| AR222868A1 (en) | 1981-06-30 |
| RO82090A (en) | 1983-07-07 |
| RO82090B (en) | 1983-06-30 |
| ES8102905A1 (en) | 1981-02-16 |
| FR2454984A1 (en) | 1980-11-21 |
| ES491452A0 (en) | 1981-02-16 |
| IT7922095A0 (en) | 1979-04-24 |
| GB2047621B (en) | 1983-05-18 |
| HU180344B (en) | 1983-02-28 |
| FR2454984B1 (en) | 1986-12-12 |
| JPS55159974A (en) | 1980-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950328 |