CA1313581C - Belt release system - Google Patents
Belt release systemInfo
- Publication number
- CA1313581C CA1313581C CA000561628A CA561628A CA1313581C CA 1313581 C CA1313581 C CA 1313581C CA 000561628 A CA000561628 A CA 000561628A CA 561628 A CA561628 A CA 561628A CA 1313581 C CA1313581 C CA 1313581C
- Authority
- CA
- Canada
- Prior art keywords
- platens
- platen
- belt
- frame
- clamping
- 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 - Fee Related
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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/50—Removing moulded articles
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
ABSTRACT
A belt release system for an apparatus for vulcanizing conveyor belts with, clamp frames which comprise, an upper yoke, of which one is installed ahead of the vulcanizing platen press and the other following it, the press bed being vertically moveable and having (n) clamping platens. The clamp frames are connected to the press bed and can be raised and lowered with it, and the clamp frames have (n) clamping platens connected to piston/cylinder adjusting ram systems, of which some in the upper yoke of the clamp frame have fixed cylinders. The adjusting ram systems of the upper (n)th clamping platen being connected between the upper platen and the upper yoke; and the adjusting ram systems of the next downward (n-1)th and (n-2)th etc. clamping platen being respectively mounted to the next upwards, e.g., (nth) or (n-1)th etc.
clamping platen. The ram systems are hydraulically actuated to move the respective platens to contact the adjacent side of 8 belt being vulcanized in the apparatus and passing through the clamping frames to be moved in a vertical direction for release from the platen press.
A belt release system for an apparatus for vulcanizing conveyor belts with, clamp frames which comprise, an upper yoke, of which one is installed ahead of the vulcanizing platen press and the other following it, the press bed being vertically moveable and having (n) clamping platens. The clamp frames are connected to the press bed and can be raised and lowered with it, and the clamp frames have (n) clamping platens connected to piston/cylinder adjusting ram systems, of which some in the upper yoke of the clamp frame have fixed cylinders. The adjusting ram systems of the upper (n)th clamping platen being connected between the upper platen and the upper yoke; and the adjusting ram systems of the next downward (n-1)th and (n-2)th etc. clamping platen being respectively mounted to the next upwards, e.g., (nth) or (n-1)th etc.
clamping platen. The ram systems are hydraulically actuated to move the respective platens to contact the adjacent side of 8 belt being vulcanized in the apparatus and passing through the clamping frames to be moved in a vertical direction for release from the platen press.
Description
13135~1 The present invention relates to a belt release system for conveyor belt vulcanizing apparatus.
The preferred embodiment has two clamp frames each having an upper yoke, a lower yoke, and side elements between the yokes, one frame being installed ahead of the platen press of the apparatus and one installed after it. The platen press has a press bed which can be raised and lowered, and (n) press platens. Each clamp frame of the release system is connected to the press bed with which it can be raised and lowered, and the clamp frames each have (n) clamping platens driven by piston/cylinder ad~usting ram systems, that for the upper platen being mounted to the upper yoXe.
In the context of the present disclosure, vulcanization is used to describe purely w lcani~ing measures involvin~ rubber and other rubber-like materials, as well as polymerization processes and fusion processes, involved in the production of conveyor belts of synthetic materials. In general, in plants for vulcanizing conveyor belts, the platen presses are two- or three-stage presses. In a two-stage press, there are three press platens, and in a three-stage press four such platens. In two-stage presses, (n) = 3, (for (n) as defined above) and in three-stage presses (nj = 4. The belt release systems described can also be used as a stretching arrangement, for which, at least one of the clampin~ systems must be able to move back and forth on suitable rails or appropriately elongated guide rods, propelled by a suitable drive, e.g., in the form of a ram system. As belt release systems, it must be possible for the vulcanized conveyor belts to be separated from the ad~acent press platens during the pressing process. The ram systems associated with each frame and the respective clamping platens carry thls out.
In a known belt release system shown in DE 26 36 718, ram arrangements are used in which the actuatin~ cylinders are fixed in the upper or the lower run. In operation it must be possible to place ~roups of such ram systems not only in end positLons, but also in intermedLate positions under active control; this is not only extremely costly in control technology, but requlres individually specially set-up rams.
It is an ob~ect of the present inventlon to reduce the costs involved in a belt release system of kind, and to work with very simple adiustin~ ram systems.
` 1 31 ;~5~1 This disclosure teaches that the adjusting ram system for the upper (n)th clamping platen is mounted to the upper yoke; and that the ram system for the clamping platens beneath this, e.g., (n-1)st and (n-2)nd, are mounted to the previous upper platen, e.g., (n)th, or (n-1)st, respectively. This simplifies the control relationship and makes it possible to organize matters so that the ram systems have an operating path with only two set positions, one with the piston rods of the rams extended, the other with the rods retracted. The ram cylinders are connected to on/off valves, and can receive any suitable actuating hydraulic medium can be used, for instance, water.
Embodiments of the invention will now be described with reference to the accompanying drawings wherein:
Figure 1 is a view in partial section of a belt release system embodying the present invention, intended for w lcanizing conveyor belts with a two-stage platen press, and, Figure 2a to 2i and 2k show individual operational positions of the belt release system of Figure 1, in side view.
The belt release system shown in the drawings is intended for use in a w lcanization system for conveyor belts. The apparatus is equipped with two clamp frames 4, each of which comprises an upper yoke 1, a lower yoke 2, and side elements 3; only one of the frames is shown in Figure l. One clamp frame 4 is arranged ahead--in the direction of flow of the production process-- of the two-stage press bed illustrated, and the other is arranged after the press bed. The clamp frames 4 are connected to the press bed 5, and can be raised and lowered with it. To this end, massive horizontal rods are connected to the press bed 5; one of these 6 can be seen in Figure 1 and they are indicated in Figure 2 by the double-ended arrow 6. In the embodiment shown, the clamp frames 4 can be moved in a horizontal direction on rods 6, for example by suitable horizontally operating rams 7 to operate simultaneously as a tensioning device for a section of belt to be vulcanized. The clamp frames 4 have an upper, a middle, and a lower clamp plate 11, 12, 13 similar to the press platens 8, 9, and 10. These sre connected to adjusting rams 14, 15, 16.
The cylinders 17 of the adjusting rams 14 of the upper clsmping platen 11 are mounted to the upper yoke 1. Cylinders 18 of the adjusting rams 15 of the middle clamping platen 12 are secured to the upper clamping platen 11, and cylinders 19 of the ram systems 16 of the lower clamping platen 13 are mounted to the middle clamping platen 12. The adjusting ram systems 14, 15, 16 are commercially available assemblies and are selected so that for the required function it is sufficient that they travel between two positlons, on the one hand with the piston rods 20, 21, 22 extended, and on the other, with them retracted. They can thus be actuated by connection to very simple on/off switching valves.
The operation is explalned with reference to Figures 2a to 2k. When the respective ram systems 14 7 15, and 16 sre pressurized with a hydraulic medium, the cylinder chamber concerned is indicated by a P. The individual adjusting ram systems 14, 15, 16 are illustrated as rotated out of the plane of the clamp frame b for clarity. The connection 6 of the clamp frame with the press bed S is indicated in all the drawings.
Figure 2a shows a platen press in the starting position, before closing. The press platens 8, 9, and 10 have been separated, as have the clamping platens 11, 12, and 13. Only the adjusting ram system 14 is pressurized in the lower cylinder chamber under pressure P. In Figure 2b the press bed 5 with the lower press platen 10 has been raised to tensioning position. Here, the ad~usting ram system 16 has pressure P in the lower chamber of cylinder 19. At the same time the upper chamber of ram 14 ls pressurized until the clamping position shown in Figure 2c is reached. In this position, the ram 14 has pressure P in the upper chamber, and the rams 15 and 16 hsve pressure P in their lower chambers. The two conveyor belts to be vulcanized are held between the clamping platens 11, 12, and 13. The clamp frame 4 can be moved in the direction of the arrow 23 by the ram system 7 on the rods 6 to stretch the belts. Figure 2d shows the press bed 5 moved up into the vulcani~ing pos~tion. When this is done, ths belt release system with clamping platens 11, 12, and 13 is also moved by the clamp frame 4. When the vulcanizing process is complete, the press bed 5 and the clamp frame 4 are moved into an intarmediate position as shown in Figure 2e. ~ecause the belt release system and clamping platens 11, 12, and 13 are in the clamp position, as described, if a conveyor belt adheres to the upper press platen 8 it can be released by the following procedure. As seen in Figure ~f, the ram system 14 is depressurized and the upper clamping platen 11 thus raised by a minimum of one stage. Only the ram 16 is pressurized at pressure P in the lower chamber. If the press bed 5 with its press platen 10 now moves into its open 1 31 35~1 position, the downwards movement of the clamp frame 4 will remove the conveyor belt stuck under the middle pross platen 9. This effect is lllustrated in Figure 2g. If 8 belt should stick on the lower press platen lO, the clamping platens 12 and 13 can be raised by pressurizin~ the lower chamber of ram 14.
- T~is will result in the conveyor belt being released from the lower press platen 10. If such a step is not necessary, the ram systems 15 and 16 are depressurized and the clamping platen 12 moved into middle position. Figure 2h shows the steps to be taken if a belt sticXs to the middle press platen 9.
Here, the clamping platen 11 is lowered onto the clamping platen 12 and the conveyor belt clamped into position by pressurizing the lower chamber of ram system 15. Next, the lower chamber of the ram 14 is pressurized and this raises the platens 11 and 12 and the conveyor belt becomes released from the surface of the middle press platen 9 (Fi~ure 2i). The platens 11 and 12 are then released, as is shown in Fi~ure 2k. The release effect on the belt can be enhanced in all instances by also operating the ram 7 (Fi~ure 1).
. . .
The preferred embodiment has two clamp frames each having an upper yoke, a lower yoke, and side elements between the yokes, one frame being installed ahead of the platen press of the apparatus and one installed after it. The platen press has a press bed which can be raised and lowered, and (n) press platens. Each clamp frame of the release system is connected to the press bed with which it can be raised and lowered, and the clamp frames each have (n) clamping platens driven by piston/cylinder ad~usting ram systems, that for the upper platen being mounted to the upper yoXe.
In the context of the present disclosure, vulcanization is used to describe purely w lcani~ing measures involvin~ rubber and other rubber-like materials, as well as polymerization processes and fusion processes, involved in the production of conveyor belts of synthetic materials. In general, in plants for vulcanizing conveyor belts, the platen presses are two- or three-stage presses. In a two-stage press, there are three press platens, and in a three-stage press four such platens. In two-stage presses, (n) = 3, (for (n) as defined above) and in three-stage presses (nj = 4. The belt release systems described can also be used as a stretching arrangement, for which, at least one of the clampin~ systems must be able to move back and forth on suitable rails or appropriately elongated guide rods, propelled by a suitable drive, e.g., in the form of a ram system. As belt release systems, it must be possible for the vulcanized conveyor belts to be separated from the ad~acent press platens during the pressing process. The ram systems associated with each frame and the respective clamping platens carry thls out.
In a known belt release system shown in DE 26 36 718, ram arrangements are used in which the actuatin~ cylinders are fixed in the upper or the lower run. In operation it must be possible to place ~roups of such ram systems not only in end positLons, but also in intermedLate positions under active control; this is not only extremely costly in control technology, but requlres individually specially set-up rams.
It is an ob~ect of the present inventlon to reduce the costs involved in a belt release system of kind, and to work with very simple adiustin~ ram systems.
` 1 31 ;~5~1 This disclosure teaches that the adjusting ram system for the upper (n)th clamping platen is mounted to the upper yoke; and that the ram system for the clamping platens beneath this, e.g., (n-1)st and (n-2)nd, are mounted to the previous upper platen, e.g., (n)th, or (n-1)st, respectively. This simplifies the control relationship and makes it possible to organize matters so that the ram systems have an operating path with only two set positions, one with the piston rods of the rams extended, the other with the rods retracted. The ram cylinders are connected to on/off valves, and can receive any suitable actuating hydraulic medium can be used, for instance, water.
Embodiments of the invention will now be described with reference to the accompanying drawings wherein:
Figure 1 is a view in partial section of a belt release system embodying the present invention, intended for w lcanizing conveyor belts with a two-stage platen press, and, Figure 2a to 2i and 2k show individual operational positions of the belt release system of Figure 1, in side view.
The belt release system shown in the drawings is intended for use in a w lcanization system for conveyor belts. The apparatus is equipped with two clamp frames 4, each of which comprises an upper yoke 1, a lower yoke 2, and side elements 3; only one of the frames is shown in Figure l. One clamp frame 4 is arranged ahead--in the direction of flow of the production process-- of the two-stage press bed illustrated, and the other is arranged after the press bed. The clamp frames 4 are connected to the press bed 5, and can be raised and lowered with it. To this end, massive horizontal rods are connected to the press bed 5; one of these 6 can be seen in Figure 1 and they are indicated in Figure 2 by the double-ended arrow 6. In the embodiment shown, the clamp frames 4 can be moved in a horizontal direction on rods 6, for example by suitable horizontally operating rams 7 to operate simultaneously as a tensioning device for a section of belt to be vulcanized. The clamp frames 4 have an upper, a middle, and a lower clamp plate 11, 12, 13 similar to the press platens 8, 9, and 10. These sre connected to adjusting rams 14, 15, 16.
The cylinders 17 of the adjusting rams 14 of the upper clsmping platen 11 are mounted to the upper yoke 1. Cylinders 18 of the adjusting rams 15 of the middle clamping platen 12 are secured to the upper clamping platen 11, and cylinders 19 of the ram systems 16 of the lower clamping platen 13 are mounted to the middle clamping platen 12. The adjusting ram systems 14, 15, 16 are commercially available assemblies and are selected so that for the required function it is sufficient that they travel between two positlons, on the one hand with the piston rods 20, 21, 22 extended, and on the other, with them retracted. They can thus be actuated by connection to very simple on/off switching valves.
The operation is explalned with reference to Figures 2a to 2k. When the respective ram systems 14 7 15, and 16 sre pressurized with a hydraulic medium, the cylinder chamber concerned is indicated by a P. The individual adjusting ram systems 14, 15, 16 are illustrated as rotated out of the plane of the clamp frame b for clarity. The connection 6 of the clamp frame with the press bed S is indicated in all the drawings.
Figure 2a shows a platen press in the starting position, before closing. The press platens 8, 9, and 10 have been separated, as have the clamping platens 11, 12, and 13. Only the adjusting ram system 14 is pressurized in the lower cylinder chamber under pressure P. In Figure 2b the press bed 5 with the lower press platen 10 has been raised to tensioning position. Here, the ad~usting ram system 16 has pressure P in the lower chamber of cylinder 19. At the same time the upper chamber of ram 14 ls pressurized until the clamping position shown in Figure 2c is reached. In this position, the ram 14 has pressure P in the upper chamber, and the rams 15 and 16 hsve pressure P in their lower chambers. The two conveyor belts to be vulcanized are held between the clamping platens 11, 12, and 13. The clamp frame 4 can be moved in the direction of the arrow 23 by the ram system 7 on the rods 6 to stretch the belts. Figure 2d shows the press bed 5 moved up into the vulcani~ing pos~tion. When this is done, ths belt release system with clamping platens 11, 12, and 13 is also moved by the clamp frame 4. When the vulcanizing process is complete, the press bed 5 and the clamp frame 4 are moved into an intarmediate position as shown in Figure 2e. ~ecause the belt release system and clamping platens 11, 12, and 13 are in the clamp position, as described, if a conveyor belt adheres to the upper press platen 8 it can be released by the following procedure. As seen in Figure ~f, the ram system 14 is depressurized and the upper clamping platen 11 thus raised by a minimum of one stage. Only the ram 16 is pressurized at pressure P in the lower chamber. If the press bed 5 with its press platen 10 now moves into its open 1 31 35~1 position, the downwards movement of the clamp frame 4 will remove the conveyor belt stuck under the middle pross platen 9. This effect is lllustrated in Figure 2g. If 8 belt should stick on the lower press platen lO, the clamping platens 12 and 13 can be raised by pressurizin~ the lower chamber of ram 14.
- T~is will result in the conveyor belt being released from the lower press platen 10. If such a step is not necessary, the ram systems 15 and 16 are depressurized and the clamping platen 12 moved into middle position. Figure 2h shows the steps to be taken if a belt sticXs to the middle press platen 9.
Here, the clamping platen 11 is lowered onto the clamping platen 12 and the conveyor belt clamped into position by pressurizing the lower chamber of ram system 15. Next, the lower chamber of the ram 14 is pressurized and this raises the platens 11 and 12 and the conveyor belt becomes released from the surface of the middle press platen 9 (Fi~ure 2i). The platens 11 and 12 are then released, as is shown in Fi~ure 2k. The release effect on the belt can be enhanced in all instances by also operating the ram 7 (Fi~ure 1).
. . .
Claims (5)
1. In a conveyor belt vulcanizing apparatus comprising a generally horizontal press bed on which a belt can be vulcanized, a belt release system which comprises:
at least one clamp frame through which the belt being vulcanized is passed, the frame comprising an upper yoke, means connecting the frame to the press bed for simultaneous vertical movement therewith, at least a pair of clamping platens mounted one above the next in said frame for engagement with a respective upper and a lower side of the belt being vulcanized, a respective piston/cylinder ram system for moving each of said platens in a vertical direction, the ram system for the upper of said platens being connected between the upper yoke and said upper platen and the ram system for the next of said platens being connected between its preceding platen and said next platen, and means for activating said ram systems independently for moving said platens with respect to said frame.
at least one clamp frame through which the belt being vulcanized is passed, the frame comprising an upper yoke, means connecting the frame to the press bed for simultaneous vertical movement therewith, at least a pair of clamping platens mounted one above the next in said frame for engagement with a respective upper and a lower side of the belt being vulcanized, a respective piston/cylinder ram system for moving each of said platens in a vertical direction, the ram system for the upper of said platens being connected between the upper yoke and said upper platen and the ram system for the next of said platens being connected between its preceding platen and said next platen, and means for activating said ram systems independently for moving said platens with respect to said frame.
2. A belt release system as defined in claim 1, the ram systems having an operating path with two set locations, a first in extended position and the second in retracted position.
3. A belt release system as defined in claim 1, on/off valves for operating said rams in said systems by feeding pressurized hydraulic fluid to and releasing hydraulic fluid from one or other sides of the respective cylinder.
4. A frame as defined in claim 1, three platens in said frame, a Lower side of the middle of said platens and the lowest of said platens contacting respectively upper and lower sides of a second belt being vulcanized in said apparatus and passing through said frame.
5. Apparatus as defined in claim 1, including means for moving said frame horizontally towards and away from said press bed in the direction of horizontal extension of said press bed,
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873709204 DE3709204C1 (en) | 1987-03-20 | 1987-03-20 | Belt release device for a system for the vulcanisation of conveyor belts |
| DEP3709204.9-16 | 1987-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1313581C true CA1313581C (en) | 1993-02-16 |
Family
ID=6323599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000561628A Expired - Fee Related CA1313581C (en) | 1987-03-20 | 1988-03-16 | Belt release system |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1313581C (en) |
| DE (1) | DE3709204C1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111469313B (en) * | 2020-04-16 | 2021-09-07 | 元创科技股份有限公司 | Rubber track vulcanization processing system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2636718C2 (en) * | 1976-08-14 | 1978-04-27 | G. Siempelkamp Gmbh & Co, 4150 Krefeld | Device for pressing and vulcanizing conveyor belts |
-
1987
- 1987-03-20 DE DE19873709204 patent/DE3709204C1/en not_active Expired
-
1988
- 1988-03-16 CA CA000561628A patent/CA1313581C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3709204C1 (en) | 1988-05-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |