Shredding machine, preferably shredder

Abstract

A comminution machine (1), preferably a shredder, comprising: - a rotor (2) together with rotor casing (3) for comminuting objects, preferably with a melting point or glass transition temperature between 50 °C and 200 °C, - a gearbox (4) for driving the rotor (2) and - a drive (5) for driving the gearbox (4), wherein the comminution machine (1) has at least one coolant circuit (6) for, preferably directly, cooling the gearbox (4) and at least one further coolant circuit (6), and the gearbox (4) is designed as a heat exchanger between the at least two coolant circuits (6).

Description

[0001] The present invention relates to a shredding machine, preferably a shredder, with a rotor including rotor casing for crushing objects, a gearbox for driving the rotor and a drive for driving the gearbox.

[0002] The invention further relates to a method for cooling a rotor casing of such a comminution machine and to the use of such a comminution machine.

[0003] In the prior art, shredding machines are known which have at least one driven rotor together with a rotor shell and shredding elements arranged on it for shredding objects.

[0004] The rotation of the rotor allows objects such as plastic products, metal products, or plastic-metal products—specifically, metal electrical cable waste with plastic sheathing—to be shredded using the shredding elements. The shredded parts can then be disposed of or reused accordingly.

[0005] By crushing such objects with the help of the crushing elements on the rotor shell, mechanical energy is not only used to crush the objects, but is also partially converted into heat energy, which heats the objects to be crushed or already crushed and the rotor, especially the rotor shell.

[0006] The problem is that at a certain temperature, objects can melt before, during, or after being shredded, and / or damage the shredding machine. This is particularly true for plastic objects, especially if their melting point or glass transition temperature is between 50 °C and 200 °C. Such temperatures can easily occur during the shredding process.

[0007] It is therefore disadvantageous if said items, parts thereof or the rotor, in particular the rotor shroud, itself during the crushing process, the objects or parts thereof are heated to a temperature at which they melt together, stick to the rotor shell through melting or plasticization, and / or damage the crushing machine, or at which increased material fatigue and / or susceptibility to malfunction of the crushing machine occurs.

[0008] While it is known to cool a shredding machine externally using air cooling, this is also disadvantageous because external air cooling is too inefficient. For example, melting cannot be reliably prevented at a certain throughput of materials using external air cooling.

[0009] The task is therefore to at least partially overcome the disadvantages of the prior art and to specify a comminution machine that is improved compared to the prior art, and which is characterized in particular by more efficient cooling of the rotor casing. The task further consists of specifying a process and an application using such an improved comminution machine.

[0010] This problem is solved by the features of claims 1, 13 and 15.

[0011] This problem is solved by means of a comminution machine according to claim 1, namely a comminution machine, preferably a shredder, with a rotor including rotor casing for crushing objects, preferably with a melting point or glass transition temperature between 50 °C and 200 °C, a gearbox for driving the rotor and a drive for driving the gearbox, wherein the comminution machine has at least one coolant circuit for, preferably directly, cooling the gearbox and at least one further coolant circuit, and the gearbox is designed as a heat exchanger between the at least two coolant circuits.

[0012] A coolant circuit can be a system used to cool an externally heated device and / or a self-heating device. A circulating coolant, such as water, can be carried along the heat source, heat up in the process, and then release the absorbed heat at another point.

[0013] Coolants can be fluids, gases, and / or liquids. For example, a coolant can be a water-glycol mixture, a mineral oil, or a silicone oil.

[0014] A coolant circuit can consist of a coolant loop with a pump, whereby the coolant is guided and conveyed along a pipe.

[0015] Alternatively, a coolant circuit can be a pump-free coolant circuit.

[0016] A pump-free coolant circuit can consist of a coolant reservoir that is thermally coupled to a heated device. Within the thermally coupled section of the coolant reservoir, the coolant is heated by the heated device. The heated coolant moves within the coolant reservoir due to heat convection and / or transfers heat within the coolant reservoir due to heat conduction, thus dissipating heat from the heated device. In other words, this is a coolant circuit based on the convection of a coolant and / or heat transfer within a coolant.

[0017] The term "thermally coupled" can be understood to mean that there is a connection between a heated device and a coolant circuit for heat transfer.

[0018] The heated coolant in the coolant circuit can transfer the heat, for example, to the environment, to another coolant circuit, to a heat sink and / or a heat exchanger.

[0019] The term "immediate" can mean "direct" and / or "without an intervening component".

[0020] A "coolant circuit for the direct cooling of X" can exist if the transfer of cooling power, i.e., the heat transfer, takes place directly and / or without a component located between the coolant circuit and X.

[0021] The term "indirect" here means "indirect" and / or "with at least one intermediate component".

[0022] A "coolant circuit for indirect cooling of X" exists when the transfer of cooling power, i.e., the heat transfer, takes place indirectly and / or with a component located between the coolant circuit and X.

[0023] By using at least one coolant circuit to cool the gearbox, heat can be dissipated from the gearbox, which in turn allows the gearbox to cool other parts of the shredder. At least one additional coolant circuit allows another part of the shredder to be cooled by dissipating heat energy from that part and absorbing it into the at least one additional coolant circuit. Due to the gearbox's multifunctionality—its gearbox, cooling, and heat exchanger functions—heat energy during the shredding process is efficiently dissipated from the rotor casing via the at least one additional coolant circuit, then through the gearbox, and finally through the at least one coolant circuit to cool the gearbox.

[0024] In a preferred embodiment of the comminution machine, it can be provided that the at least one coolant circuit for, preferably directly, cooling the gearbox is located outside the rotor, preferably the rotor shell, and / or that the at least one further coolant circuit is located inside the rotor, preferably the rotor shell.

[0025] A heat exchanger is a device that transfers thermal energy from one fluid stream to another. The two fluid streams can be coolant circuits.

[0026] By integrating the gearbox as a heat exchanger, it achieves multifunctionality, performing conventional gearbox functions, cooling functions, and heat exchanger functions. This multifunctionality allows for more efficient cooling, enabling higher rotor speeds and increased throughput of materials to be shredded. Consequently, the operation of the shredding machine becomes more efficient, productive, safer, and has a longer lifespan.

[0027] For the sake of completeness, it should be noted that in this disclosure, the numerical terms used, such as one, two, three, and the like, generally only describe the minimum quantity of a feature of the shredding machine. Individual features or components can, of course, be present in larger numbers. For example, shredding machines can have more than one gearbox, more than one drive, more than one coolant circuit, etc. In this sense, the numerical term "one" should be understood, where appropriate, as meaning "at least one," etc.

[0028] Further advantageous embodiments of the arrangement are defined in the dependent claims.

[0029] According to a preferred embodiment of the comminution machine, the gearbox can be designed as a bearing for the rotor.

[0030] Cooling the gearbox allows heat to be dissipated, which in turn enables the gearbox to cool other parts of the shredder. Since the gearbox also acts as a bearing for the rotor, it can transfer heat away from the rotor casing, thus cooling it. The gearbox's multifunctionality—its transmission, cooling, and bearing functions—efficiently dissipates heat energy during the shredding process from the rotor casing through the gearbox and then via at least one coolant circuit. This multifunctionality allows for more efficient cooling, enabling higher rotor speeds and increased throughput of materials. Consequently, the shredder operates more efficiently, with higher yields, greater safety, and a longer lifespan.

[0031] In a preferred embodiment of the comminution machine, it can be provided that the at least one coolant circuit for, preferably directly, cooling the gearbox is arranged outside the rotor, preferably the rotor shell.

[0032] According to a preferred embodiment of the shredding machine, it can be provided that the shredding machine comprising a first coolant circuit for, preferably directly, cooling the gearbox and at least a second coolant circuit for, preferably directly, cooling the rotor jacket.

[0033] In a preferred embodiment of the comminution machine, it can be provided that the first coolant circuit for, preferably directly, cooling the gearbox is located outside the rotor, preferably the rotor shell, and / or that at least one second coolant circuit for, preferably directly, cooling the rotor shell is located inside the rotor, preferably the rotor shell.

[0034] According to a preferred embodiment of the comminution machine, it can be provided that the at least one second coolant circuit is arranged inside the rotor shell, preferably designed to cool the inside of the rotor shell.

[0035] According to a preferred embodiment of the comminution machine, it may be provided that the comminution machine has at least a third coolant circuit, preferably within the rotor casing and / or connected to the gearbox and / or in the form of a cooling balloon.

[0036] In a preferred embodiment of the comminution machine, it can be provided that the first coolant circuit has a temperature of 15 °C to 50 °C, preferably 15 °C to 25 °C, and / or the at least one second coolant circuit has a temperature of 15 °C to 140 °C, preferably 50 °C to 120 °C, and / or the at least one third coolant circuit has a temperature of 15 °C to 140 °C, preferably 50 °C to 120 °C.

[0037] One advantage of two, three, or more coolant circuits is that the heat generated on the outside of the rotor casing by the shredding of objects, and optionally heat from other heat sources such as friction between machine parts, ambient temperature, and others, can be controlled and dissipated in a targeted manner. The heat flow within the shredding machine and / or the cooling capacity can thus be controlled.

[0038] Another advantage of having two, three, or more coolant circuits is the ability to use different coolants. Depending on the location of the respective coolant circuit, a different coolant with different properties, such as heat capacity, thermal conductivity, thermal expansion, density, commercial availability, reactivity, and / or toxicity, may be preferred.

[0039] According to a preferred embodiment of the shredding machine, it may be provided that the rotor casing and / or a cooling balloon is designed as a heat exchanger between at least two coolant circuits and / or is designed for heat transfer to the environment and / or to at least one further coolant circuit and / or to the drive.

[0040] When using a cooling balloon, the cooling balloon itself can be a coolant circuit and simultaneously a heat exchanger between two other coolant circuits.

[0041] According to a preferred embodiment of the comminution machine, it can be provided that at least one, preferably at least two or at least three or all, of the coolant circuits are designed for heat transfer to the environment and / or to at least one further coolant circuit and / or to the drive.

[0042] In a preferred embodiment of the comminution machine, it can be provided that the first coolant circuit is designed for heat transfer to the environment and / or a heat sink and / or at least a second coolant circuit is designed for heat transfer to the transmission and / or at least a third coolant circuit and / or at least a third coolant circuit is designed for heat transfer to the transmission.

[0043] In a preferred embodiment, if heat is transferred from the rotor casing to a second coolant circuit, for example, a coolant mixture within the rotor casing, the heat can subsequently be transferred directly to the gearbox and / or to the third coolant circuit. The third coolant circuit, for example, in the form of a cooling balloon, can transfer heat to the gearbox particularly efficiently through a different coolant and thermal coupling to the gearbox, especially through a direct connection to the gearbox. The first coolant circuit can dissipate the heat absorbed by the gearbox and / or generated by itself, for example, by routing a cooling loop from the gearbox to the environment and / or a heat sink.

[0044] Through the interaction of two, three or more coolant circuits, the shredding machine can be cooled individually and in a targeted manner to enable ideal cooling tailored to the requirements of the shredding operation, such as speed, throughput, etc.

[0045] According to a preferred embodiment of the comminution machine, it can be provided that at least one, preferably at least two or at least three or all, of the coolant circuits have a cooling gas and / or a cooling liquid, preferably a water-glycol mixture or an oil, as a coolant.

[0046] Depending on the specific requirements, different coolants may be advantageous, as different properties such as heat capacity, thermal conductivity, thermal expansion, density, commercial availability, reactivity and / or toxicity can be utilized.

[0047] According to a preferred embodiment of the comminution machine, it can be provided that at least one, preferably at least two or at least three or all, of the coolant circuits has a pump for conveying a coolant or is a pump-free coolant circuit.

[0048] In a preferred embodiment of the comminution machine, it can be provided that the first coolant circuit has a pump for circulating a coolant and / or at least a second coolant circuit and / or at least a third coolant circuit is a pump-free coolant circuit.

[0049] A pump offers the advantage of allowing even greater control over the cooling process. By adjusting, controlling, or regulating the coolant flow rate, the cooling can be better adapted to the operational requirements such as speed, throughput, etc.

[0050] In its simplest form, a pump-free coolant circuit can consist of a coolant reservoir thermally coupled to a heated device. The advantage of a pump-free coolant circuit lies in its simple design. A pump and the system it uses to circulate coolant are significantly more complex to design and may be difficult or even impossible to implement.

[0051] According to a preferred embodiment of the comminution machine, the gearbox may be a planetary gearbox.

[0052] A planetary gear set can also be called an epicyclic gear set. Planetary gear sets include gear or friction wheel sets that, in addition to fixed shafts, also have axles that rotate on circular paths within the frame.

[0053] A particular advantage can be the use of a planetary gearbox, as this allows, for example, a small design volume, the use of a drive shaft coaxial with the axis of rotation of the rotor, the transmission of high torques and / or a low imbalance.

[0054] In a preferred embodiment of the comminution machine, the gearbox may have a drive shaft coaxial with the axis of rotation of the rotor.

[0055] For example, if a rotating rotor needs to be cooled with a coolant circuit during operation, a rotary coolant union can be used to cool the rotor's interior. In this configuration, the incoming and outgoing coolant hoses run coaxially with the rotor's axis of rotation. However, in this case, a planetary gearbox is no longer feasible, as a planetary gearbox also requires a coaxial drive shaft for the rotor. The rotary coolant union and the planetary gearbox would then mutually block each other.

[0056] However, the shredding machine revealed here makes it possible to use a planetary gearbox and still cool the gearbox using at least one coolant circuit.

[0057] According to a preferred embodiment of the comminution machine, it can be provided that at least a second gearbox and optionally at least a second drive is provided, wherein preferably the rotor is driven from two, particularly preferably opposite, sides.

[0058] According to a preferred embodiment of the comminution machine, it may be provided that an expansion volume is provided within the rotor shell to compensate for a temperature-dependent volume expansion of at least one coolant or at least one coolant circuit.

[0059] Such an expansion volume is advantageous because a temperature-dependent volume expansion of at least one coolant within the crushing machine, especially within the rotor, can lead to material fatigue and / or damage to the crushing machine.

[0060] Furthermore, protection is sought for a method for cooling a rotor casing of a shredding machine, wherein the shredding machine, preferably a shredder, a rotor including rotor casing for crushing objects, preferably with a melting point or glass transition temperature between 50 °C and 200 °C, a gearbox for driving the rotor, a drive for driving the gearbox and at least one coolant circuit for, preferably directly, cooling the gearbox exhibits, whereby heat is transferred from the rotor casing to the gearbox.

[0061] According to a preferred embodiment of the method, it can be provided that the heat of the rotor casing is transferred directly and / or indirectly, preferably via at least one coolant circuit or at least two coolant circuits, to the gearbox.

[0062] In a preferred embodiment of the method, it can be provided that the comminution machine comprising a first coolant circuit for, preferably directly, cooling the gearbox and at least a second coolant circuit for, preferably directly, cooling the rotor jacket and optionally at least a third coolant circuit, and the heat of the rotor jacket is transferred indirectly to the gearbox via the at least one second and optionally the at least one third coolant circuit.

[0063] Furthermore, protection is sought for the use of a disclosed crushing machine for crushing at least one of the following items: Article with a melting point or glass transition temperature above 50 °C, preferably between 50 °C and 200 °C, particularly preferably between 50 °C and 150 °C, article comprising plastic, article consisting of plastic, article comprising metal, article consisting of metal, waste product, cable waste, preferably cable waste with cable sheathing, particularly preferably with PVC cable sheathing.

[0064] Further details and advantages of preferred design examples are explained in more detail below with reference to the figure description and the drawings.

[0065] It shows: Fig. 1: a side view of a shredding machine; Fig. 2: a front view of the shredding machine made of Fig. 1 with partial section along AA; Fig. 2: another side view of the shredding machine made of Fig. 1 Fig. 4: another front view of the shredding machine made of Fig. 1with section along AA; Fig. 5: a detail view from Fig. 4 ; Fig. 6: a side view of the Fig. 5 with hidden drive; Fig. 7: a perspective view of a rotor of the shredding machine made of Figs. 1 to 6 ; Fig. 8: a perspective view of the rotor from Fig. 7 with a cut along AA.

[0066] Fig. 1 shows a side view of a shredding machine 1.

[0067] Fig. 2 shows a front view of the shredding machine 1 from Fig. 1 with partial cut along AA.

[0068] The exemplary embodiment of the Figures 1 and 2 shows an embodiment of a comminution machine 1, preferably a shredder, with a rotor 2 together with rotor casing 3 for crushing objects, preferably with a melting point or glass transition temperature between 50 °C and 200 °C, a gearbox 4 for driving the rotor 2 and a drive 5 for driving the gearbox 4, wherein the comminution machine 1 has at least one coolant circuit 6 for, preferably directly, cooling the gearbox 4 and the gearbox 4 is designed as a bearing for the rotor 2.

[0069] The exemplary embodiment of the Figures 1 and 2 shows an embodiment of a comminution machine 1, preferably a shredder, with a rotor 2 together with rotor casing 3 for crushing objects, preferably with a melting point or glass transition temperature between 50 °C and 200 °C, a gearbox 4 for driving the rotor 2 and a drive 5 for driving the gearbox 4, wherein the comminution machine 1 has at least one coolant circuit 6 for, preferably directly, cooling the gearbox 4 and at least one further coolant circuit 6 and the gearbox 4 is designed as a heat exchanger between the at least two coolant circuits 6.

[0070] In Figs. 1 and 2 A single rotor 2 is shown. In another embodiment, a shredding machine 1 can have two or more rotors 2.

[0071] In this embodiment, two drives 5 and two gearboxes 4 are provided on each side of the shredding machine 1 to rotate the rotor 2, in particular the rotor casing 3. Alternatively, in another embodiment, either only one gearbox 4 and one drive 5 or more than two gearboxes and two drives 5 may be provided.

[0072] According to a preferred embodiment of the comminution machine, it can be provided that at least a second gearbox 4 and optionally at least a second drive 5 is provided, wherein preferably the rotor 2 is driven from two, particularly preferably opposite, sides.

[0073] In Fig. 2 A partial section is shown, which runs through the frame 12 and the rotor 2 of the crushing machine 1 along AA, so that the gears 4 and the expansion volume 12 are visible.

[0074] The at least one, preferably first, coolant circuit 6.7 in Figs. 1 and 2 has a coolant connection 13, a coolant hose 14 and a coolant loop 15.

[0075] It is conceivable that two separate coolant circuits 6, 7 are provided, each on either side of the shredding machine 1 and each having at least one coolant connection 13, one coolant hose 14 and one coolant loop 15. Alternatively, it is also possible to connect several coolant connections 13, coolant hoses 14 and coolant loops 15 to form a single coolant circuit 6, 7.

[0076] Instead of a coolant hose, other means such as coolant pipes or the like can also be used.

[0077] The at least one, preferably first, coolant circuit 6.7 in Figs. 1 and 2 In a preferred embodiment, heat can be exchanged with the environment, a further coolant circuit 6, a heat sink and / or a heat exchanger.

[0078] The at least one, preferably first, coolant circuit 6.7 in Figs. 1 and 2It may have a pump for circulating the coolant.

[0079] As in Figs. 1 and 2 As shown, it can preferably be provided that the at least one, preferably first, coolant circuit 6, 7 is arranged outside the rotor 2 on the gearbox 4. In this way, heat can be transferred from the rotor 2, in particular from the rotor casing 3, to the gearbox and dissipated by the cooling capacity of the at least one, preferably first, coolant circuit 6, 7.

[0080] Fig. 3 shows another side view of the shredding machine from Fig. 1 , wherein the course of a coolant through the at least one, preferably first, coolant circuit 6,7 outside the rotor 2 along the gearbox 4 is shown with a thick black line.

[0081] In a preferred embodiment of the comminution machine, a coolant is introduced into the at least one, preferably first, coolant circuit 6, 7 via a coolant connection 13, is then guided via a coolant hose 14 into a coolant loop 14, is subsequently discharged from the coolant loop 14 via another coolant hose 14, and is discharged from the at least one, preferably first, coolant circuit 6, 7 via another coolant connection 13. Such a flow path can preferably be represented by the thick black line in Fig. 3 follow or be trained differently.

[0082] Fig. 4 shows another front view of the shredding machine 1 from Fig. 1 with cut along AA.

[0083] As opposed to Fig 2 are in Fig. 4The two gearboxes 4, the two drives 5 and the two cooling balloons 10 were also cut along AA.

[0084] According to a preferred embodiment of the shredding machine, it can be provided that the shredding machine 1 comprising a first coolant circuit 6,7 for, preferably directly, cooling the gearbox 4 and at least a second coolant circuit 6,8 for, preferably directly, cooling the rotor jacket 3.

[0085] According to a preferred embodiment of the comminution machine, it can be provided that the at least one second coolant circuit 6,8 is arranged inside the rotor shell 3, preferably designed to cool the inside of the rotor shell 3.

[0086] As in Fig. 4As shown, the rotor 2 can be filled with a coolant, for example a water-glycol mixture, which thus constitutes a second coolant circuit 6,8. The heat transferred by the rotor 2 to its rotor shell 3 during the crushing of objects can therefore be dissipated very efficiently, since the inner surface of the rotor shell 3, and thus the contact area with the second coolant circuit 6,8, is very large.

[0087] In one embodiment of the shredding machine 1, the rotor 2 can be sealed to the outside so that no coolant can escape. For this purpose, suitable joining techniques such as welding metal parts and / or common sealing techniques such as sealing rings can be used.

[0088] As in Fig. 4 As shown, a third coolant circuit 6,9 in the form of a cooling balloon 10 can be provided within the rotor casing 3.

[0089] According to a preferred embodiment of the comminution machine, it can be provided that the comminution machine 1 has at least a third coolant circuit 6,9, preferably within the rotor casing 3 and / or connected to the gearbox 4 and / or in the form of a cooling balloon 10.

[0090] The cooling balloon 10 can contain a different coolant than the second coolant circuit 6,8, for example a cooling oil.

[0091] By combining the second coolant circuit 6,8 and the third coolant circuit 6,9, heat can be transferred and dissipated from the rotor jacket 3 to the gearbox 4 or gearboxes 4 particularly efficiently.

[0092] In a preferred embodiment, it can be provided that the at least one third coolant circuit 6,9,10 is an integral part of the gearbox 4 or is a separate device thermally coupled to the gearbox 4.

[0093] In Fig. 4 Two third coolant circuits 6, 9, 10 are shown. It can therefore be provided that each of the existing gearboxes 4 is connected to a cooling balloon 6, 9, 10, either as an integrated component of the respective gearbox 4 or connected via a thermal coupling.

[0094] As in Fig. 4 As shown, an expansion volume 11 can be provided within the rotor jacket 3, preferably between the cooling balloons 6, 9, 10, to compensate for temperature-dependent volume expansion.

[0095] According to a preferred embodiment of the comminution machine, an expansion volume 11 may be provided within the rotor shell 3 to compensate for a temperature-dependent volume expansion of at least one coolant or at least one coolant circuit 6.

[0096] Fig. 5 shows a detailed view from Fig. 4 .

[0097] In Fig. 5It can be seen that the gearbox 4 is connected to the rotor 2 and thus, in addition to transmitting power from the drive 5, also serves as a bearing for the rotor shell.

[0098] The connection of the gearbox 4 with the rotor 2 can, for example, be shown in Fig. 5 It can be seen that they are made via screw connections.

[0099] Fig. 6 shows a side view of the Fig. 5 with hidden drive 5.

[0100] In Fig. 6 The cooling loop 15 of the first coolant circuit 6,7 is particularly clearly visible.

[0101] Fig. 7 shows a perspective view of a rotor 2 of the shredding machine 1. Figs. 1 to 6 .

[0102] In Fig. 7 The rotor 2 together with rotor casing 3 and the crushing elements 16 arranged on it for crushing objects can be seen.

[0103] Fig. 8shows a perspective view of rotor 2 from Fig. 7 with a cut along AA.

[0104] In Fig. 8 The inside of the cut rotor 2 can be seen.

[0105] Although the preceding description has been written with a certain degree of detail, it should be noted that many changes can be made to the details of the design and the arrangement of its components without deviating from the basic concept and scope of this disclosure. It is understood that the invention is not limited to the embodiments presented here for illustrative purposes.

[0106] All described embodiments can be combined with each other, if technically possible, and / or supplemented by individual features of other embodiments.

Claims

1. Comminution machine (1), preferably shredder, comprising - a rotor (2) together with rotor casing (3) for comminuting objects, preferably with a melting point or glass transition temperature between 50 °C and 200 °C, - a gearbox (4) for driving the rotor (2) and - a drive (5) for driving the gearbox (4), characterized by the fact that the comminution machine (1) has at least one coolant circuit (6) for, preferably directly, cooling the gearbox (4) and at least one further coolant circuit (6) and the gearbox (4) is designed as a heat exchanger between the at least two coolant circuits (6).

2. Comminution machine (1) according to claim 1, wherein the gearbox (4) is designed as a bearing for the rotor (2).

3. Comminution machine (1) according to claim 1 or 2, wherein the comminution machine (1) has - a first coolant circuit (6,7) for, preferably directly, cooling the gearbox (4) and - at least a second coolant circuit (6,8) for, preferably directly, cooling the rotor jacket (3).

4. Comminution machine (1) according to the preceding claim, wherein the at least one second coolant circuit (6, 8) is arranged inside the rotor shell (3), preferably designed to cool the inside of the rotor shell (3).

5. Comminution machine (1) according to one of the preceding claims, wherein the comminution machine (1) has at least a third coolant circuit (6, 9), preferably within the rotor shell (3) and / or connected to the gearbox (4) and / or in the form of a cooling balloon (10).

6. Comminution machine (1) according to one of the preceding claims, preferably according to the preceding claim, wherein the rotor jacket (3) and / or a cooling balloon (10) is designed as a heat exchanger between at least two coolant circuits (6) and / or is designed for heat transfer to the environment and / or to at least one further coolant circuit (6) and / or to the drive (5).

7. Comminution machine (1) according to one of the preceding claims, wherein at least one, preferably at least two or at least three or all, of the coolant circuits (6) is designed for heat transfer to the environment and / or to at least one further coolant circuit (6) and / or to the drive (5).

8. Comminution machine (1) according to one of the preceding claims, wherein at least one, preferably at least two or at least three or all, of the coolant circuits (6) comprise a cooling gas and / or a cooling liquid, preferably a water-glycol mixture or an oil, as the coolant.

9. Comminution machine (1) according to one of the preceding claims, wherein at least one, preferably at least two or at least three or all, of the coolant circuits (6) has a pump for conveying a coolant or is a pump-free coolant circuit (6).

10. Comminution machine (1) according to one of the preceding claims, wherein the gearbox (4) is a planetary gearbox.

11. Comminution machine (1) according to one of the preceding claims, wherein at least a second gearbox (4) and optionally at least a second drive (5) is provided, wherein preferably the rotor (2) is driven from two, particularly preferably opposite, sides.

12. Comminution machine (1) according to one of the preceding claims, wherein an expansion volume (11) is provided within the rotor shell (3) to compensate for a temperature-dependent volume expansion of at least one coolant or at least one coolant circuit (6).

13. Method for cooling a rotor casing (3) of a comminution machine (1), wherein the comminution machine (1), preferably a shredder, comprises: - a rotor (2) together with a rotor casing (3) for comminution of objects, preferably with a melting point or glass transition temperature between 50 °C and 200 °C, - a gearbox (4) for driving the rotor (2), - a drive (5) for driving the gearbox (4) and - at least one coolant circuit (6) for, preferably directly, cooling the gearbox (4), preferably according to one of claims 1 to 12, wherein heat is transferred from the rotor casing (3) to the gearbox (4).

14. Method according to claim 13, wherein the heat of the rotor casing (3) is transferred directly and / or indirectly, preferably via at least one coolant circuit (6) or at least two coolant circuits (6), to the gearbox (4).

15. Use of a shredding machine (1) according to one of claims 1 to 12 for shredding at least one of the following objects: - object with a melting point or glass transition temperature above 50 °C, preferably between 50 °C and 200 °C, particularly preferably between 50 °C and 150 °C, - object comprising plastic, - object consisting of plastic, - object comprising metal, - object consisting of metal, - waste product, - cable waste, preferably cable waste with cable sheathing, particularly preferably with PVC cable sheathing.

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