DEVICE AND METHOD FOR MANUFACTURING AT LEAST ONE DRIVE BELT

Description

[0001] The invention relates to a device for producing at least one drive belt, comprising a tubular forming body with a first inner cavity extending in the longitudinal direction of the forming body over the entire or predominant length of the forming body and circumferentially surrounded by a wall of the forming body. The inner side of the wall of the forming body facing the first inner cavity has a forming surface for contacting and shaping the drive belt to be produced during the production process. The invention also relates to a method for producing at least one such drive belt using such a device.

[0002] Insofar as the device and method refer to the production of a drive belt or at least one drive belt, this naturally includes the simultaneous production of a plurality of drive belts using one and the same device and within one production process. In particular, the device and method according to the invention enable the simultaneous production of a plurality of drive belts with a correspondingly long molding body.

[0003] Such a drive belt is known, for example, from EP 3 822 399 A1. Such drive belts are used in various applications to transmit mechanical work between two or more rotating machine elements by kinematically coupling the rotary movements of these. The drive belt is usually guided over pulleys, which are coupled by the drive belt in the aforementioned sense. The drive belt rotates around the pulleys on their outer surfaces and transfers tangentially acting drive forces and output forces to the pulleys, which, due to the radial distance of the outer surface from the axis of rotation, lead to a torque acting on the pulley. Such drive belts are used in various variants, e.g. in the form of V-belts and V-ribbed belts. V-ribbed belts are V-belts with ribs on the side of the V-belt facing the pulley.

[0004] V-ribbed belts with small profiles allow pulley diameters of less than 50 mm and are therefore used in large quantities for material flow in logistics, e.g., for transferring the drive power of a motor from roller to roller to numerous conveyor rollers. Accordingly, short V-ribbed belts with lengths of less than 400 mm, and sometimes even less than 250 mm, are required.

[0005] For cost-effective production, coils with several hundred ribs are assembled and vulcanized in a "turned" position, then cut into 2- or 3-ribs and rolled back to their normal position. For assembly, first the backing, then the cord, and finally the core layer are applied to a steel drum. Various vulcanization processes are known.

[0006] A structured rubber hose is used specifically for short belts: This carries the rib negative inside and transfers it to the raw coil using external pressure. Temperature and mold evacuation first support the embossing, then the vulcanization. After cooling and the pressure is removed, the rubber hose separates from the finished coil, making it easy to demold even for short lengths (250-400 mm).

[0007] For longer lengths, the airbag process with a precisely formed V-ribbed profile is therefore common. Instead of remaining on the assembly drum, the raw coil – possibly in a kidney shape – is inserted into an external steel mold, which again carries the rib negative on the inside. This is followed by a smooth rubber hose, which then presses the raw coil into the steel mold and thus into the rib negative under internal pressure. Again, temperature and mold evacuation support embossing and vulcanization. The mostly elastic cords accommodate the stretching without problems, even for lengths down to 100 mm. After cooling and pressure release, the smooth hose can be easily pulled out, but the coil must be "peeled off" from the steel mold, folded into a kidney shape, and thus pulled out axially. Since with belt lengths under 400 mm, it is no longer possible to insert an arm into coils with an inner diameter of less than 125 mm, the coils can no longer be traditionally 600 mm, but only, for example,200 mm high - as far as your fingers can reach.

[0008] Since the heat is traditionally introduced by steam and the steel mold has to be designed as a double-walled pressure vessel, the airbag process requires not only the high personnel expenditure for the small winding heights but also a high investment expenditure for one pressure vessel per belt length.

[0009] GB 556 811 A discloses a method and apparatus for molding rubber and similar materials. GB 2 088 277 A discloses an apparatus for producing herringbone belts. DE 10 2015 221 168 A1 discloses a method and manufacturing apparatus for producing a double-toothed timing belt. DE 25 17 430 A1 discloses a mold for producing double-toothed timing belts. US 3,659,976 A discloses an apparatus for casting and vulcanizing annular rubber articles. US 4,984,976 A discloses a mold for producing annular polymer articles.

[0010] The invention is based on the object of providing an improved device and a method for producing at least one drive belt, in which the disadvantages mentioned are avoided.

[0011] This object is achieved with a device according to claim 1. In a first variant of the invention, this involves the shaping body being divided longitudinally into at least two individual parts, which form respective sectors of the shaping body. The sectors can extend over the entire length of the shaping body or part of this length. The shaping body can, for example, have a substantially hollow cylindrical shape, whereby the shape on the outside can also be designed differently from the cylindrical shape, for example, with one or more flattened areas. The term "sector" is to be understood in the mathematical sense.

[0012] Advantageously, the device according to the invention allows demolding of the produced drive belt in a particularly simple and gentle manner by separating the sectors of the molding body from one another after the individual production steps have been carried out, in particular by moving the sectors away from one another in the radial direction. Advantageously, the device according to the invention is suitable for carrying out already tried and tested production steps, in particular for carrying out the known airbag vulcanization, without the disadvantages occurring with known devices, such as the high cost of demolding and the risk of damage during demolding. The device according to the invention is suitable for all common lengths of drive belts, e.g.For lengths ranging from 180 to 700 mm, the molds can be temperature-controlled with just one, or at most four, different heating and cooling devices. This minimizes investment costs and setup time. Furthermore, a very uniform temperature distribution can be achieved across the circumference and length of the mold body, especially with temperature differences of less than 10°C.

[0013] According to an advantageous embodiment of the invention, the device has a locking device by means of which the sectors are locked against movement in the axial direction, at least when assembled to form the forming body. As a result, the sectors of the forming body are fixed to one another in a defined manner, so that no undesired displacements can occur between the sectors during the production process of the drive belt. The sectors are locked at least in the axial direction by the locking device. In addition, the sectors can also be locked in the radial direction by the same locking device or a further locking device. The locking device can be implemented, for example, by pins and / or feather keys and corresponding recesses on the respective other part of the sectors of the forming body to be joined.The device can also have, for example, a lid and a base, which cover the forming body at the axial end faces. In this case, the locking device can, for example, have a stop for the individual sectors of the forming body on the lid and / or the base.

[0014] According to a further variant of the invention, which can also be advantageously combined with the first-mentioned variant, the device has an outer tube designed as a tubular body with a second inner cavity configured to receive the tubular shaping body, e.g., the sectors assembled to form the shaping body or a shaping body not divided into sectors. Alternatively, the device can have another outer part arranged outside the tubular shaping body, wherein the outer part and the shaping body form two radially interlocking components of the device.

[0015] The outer tube can be designed as a hollow cylindrical tube, for example. The outer tube makes it possible to securely hold the sectors combined to form the shaped body in the radial direction, even under high internal pressures, as occur in the airbag process, by inserting the shaped body, i.e. its interconnected sectors, into the outer tube. The further manufacturing steps for producing the drive belt are then carried out in this state. Before the produced drive belt is demolded, the shaped body is removed from the outer tube again. The outer tube can advantageously be designed as a one-piece tube at least in the circumferential direction, so that it can absorb high radial forces. In the axial direction, the outer tube can be designed in one piece or in multiple parts, for example in the form of several outer tube sections.

[0016] In the case of a forming body that is not divided into sectors, the device design described, i.e. a component arranged outside the forming body, namely the outer tube or the outer part, achieves the advantage that the various dimensionally variable forming bodies can be designed simply and only a few complex outer tubes or outer parts, for example with steam tempering, are required.

[0017] According to an advantageous embodiment of the invention, the outer tube or outer part is configured to control the temperature of the tubular molding body through heat transfer. For example, the outer tube or outer part can be heated by one of the heating devices explained below, thereby indirectly heating the molding body.

[0018] According to an advantageous embodiment of the invention, the inner diameter of the second inner cavity and the outer diameter of the forming body form a clearance fit at a temperature below 30°C. This has the advantage that the forming body, with its assembled sectors, can be inserted into the outer tube without great effort and removed again after completion of the manufacturing process. This avoids excessive friction between the outer tube and the forming body, and accordingly, wear between these parts is minimized. The same advantages also apply to a forming body that is not divided into sectors.

[0019] According to an advantageous embodiment of the invention, the inner diameter of the second inner cavity and the outer diameter of the molding body form a press fit at a temperature above 80°C. This has the advantage that the individual sectors of the molding body are securely held in the outer tube in this state, even without additional fixing elements. A further advantage is that a uniform, good heat transfer is established between the outer tube and the molding body, which makes it possible to heat the entire device by means of a heating device that transfers the heat to the outer tube, for example, a heating device arranged outside the outer tube. The heat is then transferred from the outer tube to the molding body without significant losses. The same advantages also apply to a molding body that is not divided into sectors.

[0020] According to the invention, the shaping body or its sectors are made of a material that has a higher thermal expansion coefficient than the material of the outer tube or the outer part. This makes it easy to achieve the aforementioned press fit between the outer tube and the shaping body at higher temperatures. For example, the outer tube or outer part can be made of a ferromagnetic material, e.g., steel. Aluminum, for example, is a suitable material for the shaping body. In general, materials that have good thermal conductivity are particularly suitable for the shaping body, as this compensates for any temperature differences on the shaping body and keeps the temperature differences below the maximum desired temperature difference of 10°C.

[0021] According to an advantageous embodiment of the invention, the device includes a heating device configured to heat the outer tube or the outer part to a temperature sufficient to carry out a manufacturing process for the drive belt. In this way, the manufacturing process for the drive belt can be carried out reliably, energy-efficiently, and quickly. The forming body is then heated indirectly via the heat transferred from the outer tube or outer part to it by heat transfer.

[0022] Due to the advantageous design of the shaping body and optionally of the outer tube, the heating device can be designed as, for example, an induction heater, a conduction heater and / or a heating device in which a heated gaseous medium is passed through heating channels of the heating device. The heating device can also be a combination of the aforementioned variants. With induction heating, the heat in the device is generated inductively, e.g. by means of an induction coil arranged around the shaping body or around the outer tube. With conduction heating, the heat is generated conductively, i.e. by resistance heating, e.g. by passing an electric current through the shaping body and / or the outer tube. With heating by a gaseous medium, at least part of the device has gas guide channels through which the gaseous medium is passed, e.g. in the form of steam heating.

[0023] According to an advantageous embodiment of the invention, the device comprises a flexible and / or elastic pressure bellows, particularly in the form of rubber pants, which has a smooth or textured outer surface for receiving the raw material for producing the drive belt. Such an elastic pressure bellows, which can be designed similarly to an airbag, for example, is simply inserted into the interior of the forming body for the manufacturing process once the raw coil has already been inserted there. By applying pressure to the pressure bellows, it then presses the raw coil against the forming surface of the forming body.

[0024] According to an advantageous embodiment of the invention, the pressure bellows has an outer diameter that, at atmospheric pressure within the pressure bellows, is smaller than the inner diameter of the first inner cavity by at least the thickness of the raw material arranged between the forming body and the pressure bellows for producing the drive belt. This allows for simple and rapid insertion of the pressure bellows into the first inner cavity, at least as long as the pressure bellows is not yet subjected to a significant overpressure. The raw material for producing the drive belt has sufficient space in the space between the pressure bellows and the forming body and thus does not hinder the insertion of the pressure bellows.

[0025] According to an advantageous embodiment of the invention, the device is designed to produce at least one drive belt with a ribbed structure, in particular to produce at least one V-ribbed belt, wherein the shaping surface of the shaping body has a surface structuring that is designed as a negative mold of the ribs of the drive belt to be produced, i.e., as a rib negative. This enables, in particular, particularly simple demolding of a structured drive belt, i.e., a drive belt with a ribbed structure, by the device according to the invention, i.e., by the separable sectors of the shaping body.

[0026] The object mentioned at the outset is also achieved by a method for producing a drive belt using a device of the type described above, comprising the following steps: A) Providing a raw coil from a raw material of the drive belt, B) Inserting the raw coil into the sectors of the forming body that are not yet connected to one another or, in the case of a forming body that is not divided into sectors, into the forming body, C) In the case of a forming body that is divided into sectors, connecting the sectors of the forming body to one another so that a closed inner cavity is created in which the raw coil is arranged, D) Inserting an elastic pressure bellows into the interior of the raw coil, E) Heating the forming body to a first temperature, F) Pressurizing an interior of the pressure bellows to carry out a pressing process of the raw coil against the forming surface of the first inner cavity, G) Demolding the produced drive belt from the forming body, wherein, in the case of a forming body that is divided into sectors, the sectors of the forming body are separated from one another.

[0027] This also allows the previously discussed advantages to be realized. By initially heating the forming body to a first temperature and applying pressure to the pressure bellows, the desired basic shape is imprinted on the raw coil. Accordingly, the first temperature can be the embossing temperature for such a manufacturing process.

[0028] In an advantageous embodiment of the invention, the previously specified steps A) to G) can be carried out in the specified order. Step F) can be performed before or after step E), or at a time that overlaps with step E). The simultaneous or at least temporally overlapping application of pressure during heating results in a positive fit, which offers advantages in terms of temperature distribution.

[0029] In the case of producing a drive belt with a rib structure, step F) can be carried out as follows: F) Pressurizing an interior of the pressure bellows to carry out an embossing process of the raw winding on the surface structuring of the first inner cavity.

[0030] In this way, the desired ribs of the drive belt are created during the embossing process.

[0031] According to an advantageous embodiment of the invention, after step F) and before step G), the molded body is further heated to a vulcanization temperature above the first temperature. Once the vulcanization temperature is reached, a vulcanization isolation phase is carried out. This converts the rubber mixture used for the drive belt into a vulcanizate.

[0032] According to an advantageous embodiment of the invention, after step C) and before step D), the molding body is introduced into an outer tube of the device, and before demolding the produced drive belt in step G), the molding body is removed from the outer tube of the device. This has the advantage that the multi-part molding body is held and stabilized by the outer tube during the manufacturing process. Furthermore, the device can be heated indirectly by heating the outer tube. This, in turn, has the advantage that the device does not require a heating device integrated into the molding body.

[0033] According to an advantageous embodiment of the invention, the heating of the molding body is carried out by means of induction heating, conduction heating, and / or a heated gaseous medium, in particular by means of steam heating. In the case of heating by a gaseous medium, for example, the outer tube can be designed as a double-walled pressure vessel through which the aforementioned gaseous medium is passed, for example, steam in the case of steam heating.

[0034] According to an advantageous embodiment of the invention, in step G), in the case of a molding body divided into sectors, the sectors of the molding body are moved away from each other in a radial direction during demolding of the produced drive belt from the molding body. This enables reliable demolding of the drive belt without risk of damage.

[0035] The device can additionally have a cooling device with which the parts of the device previously heated by the heating device can be quickly cooled again. The heating device, together with the cooling device, can form a tempering device for tempering the molding body and, if applicable, its outer tube.

[0036] In summary, the following advantages can be achieved with the invention.

[0037] Overcoming the disadvantages of the state of the art mentioned at the beginning Length restrictions, low rib quality, low winding height and thus high personnel costs as well as the avoidance of steam vessels and thus high article-specific investment costs. Another advantage is the use of standard industrial inductive heating devices instead of steam, the resulting reduced infrastructure and low space requirements, which enables globally distributed production according to customer locations and avoids the transport of many cubic meters of air due to the low packing density of the micro V-ribbed belts. Due to the relatively low molding costs, the economical production of special items such as curve belts

[0038] The invention is explained in more detail below using exemplary embodiments and drawings.

[0039] Show Figure 1 shows a device for producing a drive belt in cross-sectional view, Figure 2 shows the device according to Figure 1in longitudinal section.

[0040] The Figure 1 The device 1 shown has a multi-part shaping body 2, 3, which in this case is divided into two individual parts that form a sector 2 and a sector 3 of the shaping body 2, 3. It can be seen that the shaping body 2, 3 has an essentially hollow cylindrical shape. The shaping body 2, 3 has a shaping surface 6 on the inside for the contact of the drive belt 7 to be produced. Inside the drive belt 7, or before the manufacturing process inside the raw coil, there is a pressure bellows 8, which can be subjected to increased internal pressure in order to press the raw coil or the drive belt 7 against the shaping surface 6. The space between the shaping surface 6 and the outside of the pressure bellows 8 can additionally be evacuated by means of an evacuation device.

[0041] In the illustrated assembled state, the sectors 2, 3 are locked against movement in the axial direction by means of a locking device, e.g., by means of a cover 4, i.e., they cannot move relative to one another in the axial direction. The shaping body 2, 3 is arranged within an outer tube 5. The device also has a heating device 9 configured to transfer heat to the outer tube 5. The outer tube 5 transfers the heat to the shaping body 2, 3, which has a high thermal conductivity, so that the heat is distributed evenly throughout the shaping body 2, 3.

[0042] As the Figure 2As illustrated, the device 1 has a cover 4, 10 on each end face, which longitudinally seals the forming body 2, 3 and the outer tube 5. At least one of the covers 4, 10 can serve as a locking device for securing the sectors of the forming body 2, 3 in the axial direction. To carry out the manufacturing process of the drive belt 7, the interior 11 of the pressure bellows 8 is pressurized to a pressure greater than atmospheric pressure.

[0043] The outer tube 5 can be designed as a ferromagnetic outer tube, for example, made of steel. The outer tube 5 has an outer diameter ADA, an inner diameter IDA, and a height (or length) HA.

[0044] The forming body 2, 3 forms a split inner tube of the device, e.g., with a fixed outer diameter ADI, an inner diameter IDI, and a fixed height (or length) Hl. The splitting plane of the forming body 2, 3 can run through the tube's central axis. The sectors 2, 3 can be made of a material with a higher thermal expansion coefficient than the outer tube 5 and good thermal conductivity, which also compensates for temperature differences within the mold. The material is preferably aluminum. The inner surface of the tube has the negative shape of the fins to be produced; the average inner diameter IDI is therefore variably adapted to the belt length to be produced.

[0045] IDA and ADI can be matched to each other so that a clearance fit is present at room temperature (e.g., 30°C) and a press fit at 80°C at the latest. This allows the inner tube halves to be pushed into the outer tube at room temperature; at 80°C, the lowest flow temperature of the wound blanks, the gap between the inner tube halves is closed.

[0046] HI and HA can be matched so that they are higher than the raw coil at room temperature and HI < HA at the highest vulcanization temperature. Due to the cylindrical shape of the outer and inner tubes, the inner tube partially slides on the outer tube during heating and cooling due to the higher thermal expansion coefficient.

[0047] The sectors can be connected, for example, by pins or keys and / or a stop of the sectors on the cover or base, which prevent axial displacement of the sectors relative to each other.

[0048] The pressure bellows 8 can be designed as a smooth rubber hose with an outer diameter ADH such that, at atmospheric pressure within the pressure bellows 8 and with ADH < the inner diameter of the raw coil, the raw coil can be easily inserted and removed. At an industrially typical internal pressure, the rubber hose can press the raw coil into the negative rib of the inner tube. The hose height HH can be dimensioned with HH > HA such that the rubber hose seals off the internal pressure via the cover and base. A seal to the outer tube 5, e.g., with O-rings, can advantageously be arranged close to the outer diameter so that any cooling water residues can be easily and completely sucked away.

[0049] The lid and base can be designed with seals and sealing surfaces to the outer tube 5 and the pressure bellows 8, as well as to supply connections for the internal pressure of the hose and for the mold evacuation. If the lid and base are stepped at the contact points, the above-mentioned lengths must be adapted accordingly.

[0050] It is also advantageous to treat or coat the outer and / or inner surface of the inner tube, or parts thereof, so that these parts are more resistant to wear or damage and exhibit low adhesion to the coil and / or outer tube. The former is achieved, for example, by anodizing, while the latter is achieved, for example, by applying a release agent—also common in steel molds. If the release agent is water-based, it is advantageous to evaporate the water, for example, by heating, before contact with the coil blank to prevent steam damage to the coil.

[0051] The heat-introducing part of the tempering device, ie the heating device 9, can consist of an induction heating device, e.g. a commercially available one for joining rolling bearings, with an induction coil with an inner diameter IDS, so that an air gap L = ½ (IDS-ADA) is created for easy insertion and removal of the mold, which may also be reinforced with a cooling jacket. The turns of this coil vary in their pitch so that during heating the different heat requirements for the middle, lid and bottom areas with their different heat capacities and convection conditions (e.g. chimney effect) are met so that the temperature distribution is sufficiently even. For this purpose the induction coil advantageously extends beyond the mold height in the edge areas and the coil pitch is smaller here than in the middle. And / or the design of the outer tube as a double-walled pressure vessel, again traditionally for heating with steam, whereby the multiple use of the outer tube for many belt lengths keeps the investment costs within limits.Additionally, both heating variants can incorporate variable thermal insulation of the lid, base, and / or outer tube, which reduces heat losses from the mold and thus energy consumption and adapts to changes in zone heat requirements. These arise because maintaining the temperature plateau only compensates for heat losses, and not, as with heating, the heat capacities. Different heat zone requirements also arise when inner mold halves with different wall thicknesses are used for a different belt length, thus resulting in a different heat capacity in the center region and the same heat capacity in the edge zones.

[0052] The cooling part of the tempering device can consist with inductive heating o from a water bath into which the entire forming body 2, 3 with the outer tube 5 is immersed. The water bath has the advantage that the inductive heater can already be charged with the next mold. or o or from a cooling jacket made of a material that cannot be heated inductively, such as a glass-filled plastic. The cooling jacket is located in the air gap L between the coil and the outer tube. It forms a hollow space to the outer tube which is flooded with cooling water for cooling. An inflow / inflows at the bottom and an outflow / outflows at the top are advantageous so that the hollow space is completely filled with cooling water and the water vapor initially produced can escape unhindered through the outflows. Due to the unhindered outflow, the outer tube and cooling jacket do not need to be designed as pressure vessels. The cooling jacket has the advantage that water droplets do not have to be laboriously sucked off the mold.In steam heating, it traditionally consists of a double-walled pressure vessel outer pipe and diverters in the steam inlet and outlet, which stop the steam flow and direct cooling water into the hollow space of the double-walled outer pipe.

[0053] The process for producing drive belts using such a device can be as follows: 1. Apply release agent to the forming surface 6 of the forming body 2, 3 and to the outside of the pressure bellows 8 2. Assemble the raw coil in an inverted structure, but on a dismantable assembly drum (e.g. wedge connection), and remove the raw coil from the assembly drum 3. Insert the raw coil into the opened sectors of the forming body 2, 3, then join the sectors together with axial displacement protection 4. Insert the forming body 2, 3 and the raw coil into the outer tube 5 until it stops at the bottom 5. Insert the pressure bellows 8 right inside 6. Close the mold formed in this way with a lid including internal pressure and mold evacuation connection 7. If necessary, insert the mold into the induction coil 8. Heat up to embossing temperature, evacuate the mold 9. Internal pressure build-up and embossing phase 10. Heat up to vulcanization temperature and Vulcanization phase 11. Switch off vacuum, cool to near room temperature, switch off internal pressure 12. If necessary.Remove the mold from the induction coil and suck out the water droplets 13. Remove the lid, remove the pressure bellows 8 and the forming body 2, 3 including the winding or drive belt 14. Open the forming body 2, 3 and "peel out" the winding or drive belt from the forming surface 6 15. Repeat with a new winding from step 2 or, if the release agent is used up, from step 1. .

[0054] An alternative process with stop / fastening of the sectors of the forming body 2, 3 to the lid can be carried out as follows and is particularly suitable for cooling with a cooling jacket / double-walled outer tube, where the outer tube, base and cooling device may remain in the induction coil: 1. Apply release agent to the forming surface 6 of the forming body 2, 3 and to the outside of the pressure bellows 8 (as above) 2. Assemble the raw coil in an inverted structure, but on a dismantable assembly drum (e.g. wedge connection), and remove the raw coil from the assembly drum (as above) 3. Insert the raw coil into the opened sectors of the forming body 2, 3 as above, insert the pressure bellows 8 right inside, close the sectors of the forming body 2, 3 and stop / fasten to the cover 4. Insert the forming body 2, 3 / raw coil / cover into the outer tube 5 / base, 5. Close the mold thus formed including internal pressure and mold evacuation connection 6. Heat up to embossing temperature, evacuate the mold (as above) 7. Internal pressure build-up and embossing phase (as above) 8. Heat up to vulcanization temperature and Vulcanization phase (as above) 9. Switch off vacuum, cool to near room temperature, switch off internal pressure (as above) 10.Removing the assembly cover / forming body 2, 3 / coil / pressure bellows 8, removing the cover and the pressure bellows 8 11. Opening the forming body 2, 3 and "peeling out" the coil or the drive belt from the forming surface 6 (as above) 12. Repeat with a new coil from step 2 or, if the release agent is used up, from step 1 (as above).

Claims

1. Device (1) for producing at least one drive belt (7), having a tubular shaping body with a first inner cavity which extends in the longitudinal direction of the shaping body over the entire or predominant length of the shaping body and is surrounded on the circumferential side by a wall of the shaping body, wherein the inner side of the wall of the shaping body facing the first inner cavity has a shaping surface (6) for contacting and shaping the drive belt (7) to be produced during the manufacturing process, with one or both of the following features i), ii): i) the shaping body is divided longitudinally into at least two individual parts, which form respective sectors (2, 3) of the shaping body, ii) the device (1) has - an outer tube (5) which is designed as a tubular body with a second inner cavity which is arranged to receive the tubular shaping body, or - another outer part arranged outside the tubular shaping body, the outer part and the shaping body forming two radially interlocking components of the device, characterized in that the shaping body or its sectors (2, 3) consist of a material which has a higher coefficient of thermal expansion than the material of the outer tube (5) or the outer part.

2. Device according to claim 1, characterized in that the device (1) has a locking device by means of which the sectors (2, 3) are locked against movement in the axial direction at least in the state assembled to form the shaping body.

3. Device according to one of the preceding claims, characterized in that the outer tube (5) or the outer part is set up for tempering the tubular shaping body by heat transfer.

4. Device according to claim 3, characterized in that the inner diameter (IDI) of the second inner cavity and the outer diameter of the shaping body form a clearance fit at a temperature below 30 °C.

5. Device according to claim 3 or 4, characterized in that the inner diameter (IDI) of the second inner cavity and the outer diameter of the shaping body form an interference fit at a temperature above 80 °C.

6. Device according to any one of the preceding claims, characterized in that the device (1) has a heating device (9) which is arranged to heat the outer tube (5) or the outer part to a temperature sufficient for carrying out a manufacturing process of the drive belt (7).

7. Device according to one of the preceding claims, characterized in that the device (1) has a flexible and / or elastic pressure bellows (8), in particular in the form of a rubber trouser, which has a smooth or structured outer surface for receiving the raw material for producing the drive belt (7).

8. Device according to one of the preceding claims, characterized in that the pressure bellows (8) has an outer diameter which, at atmospheric pressure inside the pressure bellows (8), is smaller than the inner diameter (IDI) of the first inner cavity by at least the thickness of the raw material arranged between the shaping body and the pressure bellows (8) for producing the drive belt (7).

9. Device according to one of the preceding claims, characterized in that the device (1) is set up for producing at least one drive belt (7) with a ribbed structure, in particular for producing at least one ribbed V-belt, the shaping surface (6) of the shaping body having a surface structuring which is designed as a negative shape of the ribs of the drive belt (7) to be produced.

10. Method for manufacturing at least one drive belt (7) by means of an apparatus according to one of the preceding claims, comprising the following steps: A) Preparation of a raw winding from a raw material of the drive belt (7), B) Inserting the raw winding into the sectors (2, 3) of the shaping body that are not yet connected to each other or, in the case of a shaping body that is not divided into sectors, into the shaping body, C) in the case of a shaping body divided into sectors, connecting the sectors (2, 3) of the shaping body to each other so that a closed inner cavity is formed in which the raw winding is arranged, D) Insertion of an elastic pressure bellows (8) into the interior (11) of the raw winding, E) Heating the shaping body to a first temperature, F) pressurizing an inner space (11) of the pressure bellows (8) for carrying out a pressing operation of the raw winding against the shaping surface (6) of the first inner cavity, wherein step f) can be carried out before, after or overlapping in time with step E), G) demolding the manufactured drive belt (7) from the shaping body, whereby in the case of a shaping body divided into sectors, the sectors (2, 3) of the shaping body are separated from one another.

11. Method according to claim 10, characterized in that after step F) and before step G), the shaping body is heated further to a vulcanization temperature (HI) above the first temperature and, when the vulcanization temperature (HI) is reached, a vulcanization phase is carried out.

12. Method according to one of claims 10 to 11, characterized in that after step C) and before step D) the shaping body is introduced into an outer tube (5) of the device (1) and before demolding of the manufactured drive belt (7) in step G) the shaping body is removed from the outer tube (5) of the device (1).

13. Method according to claim 12, characterized in that the heating of the shaping body is carried out indirectly by heating the outer tube (5).

14. Method according to one of claims 10 to 13, characterized in that the heating of the shaping body is carried out by means of an induction heater, a conduction heater and / or by a heated gaseous medium, in particular by means of a steam heater.

15. Method according to one of claims 10 to 14, characterized in that in step G), in the case of a shaping body divided into sectors, the sectors (2, 3) of the shaping body are moved away from one another in the radial direction during demoulding of the manufactured drive belt (7) from the shaping body.