MOLDING SYSTEM, ESPECIALLY FOR MOLDING CHEESE

Abstract

The invention relates to a cheese molding system (8) comprising upstream a tank (10) capable of containing a mixture of curd and whey, and downstream a cheese molder (12), the tank (10) and the molder (12) being connected by a transfer circuit (14) for the mixture, characterized in that the transfer circuit (14) for the mixture passes through a filtration device (18) for the mixture to extract part of the whey therefrom and to control the proportions of curd and whey in a filtered mixture transferred to the molder (12). (Fig. 2)

Description

Title of the invention: MOLDING SYSTEM, IN PARTICULAR FOR MOLDING CHEESE TECHNICAL FIELD OF THE INVENTION

[0001] The invention relates, in general, to the technical field of the food industry and relates in particular to the processing of dairy products, for example to the manufacture of cheese.

[0002] The invention relates more specifically to a molding system, in particular for molding cheese. STATE OF THE PRIOR ART

[0003] From milk to ripening, cheese production involves a large number of processing steps. One of the first operations to be carried out concerns the coagulation of the milk. This coagulation step can be obtained in different ways such as by the action of an enzyme, i.e. rennet, or by fermentation caused by lactic bacteria, or as is often the case, by a combination of the two previous methods. These methods are of course not exhaustive.

[0004] The coagulated milk is then drained. This produces the curd and the whey. The curd is the main element that will produce the cheese; the whey is reintroduced with the curd depending on the cheese desired, or more rarely, can also be used directly.

[0005] Finally, a molding operation is carried out consisting of molding the mixture of curd and whey in molds, which mixture is then refined under predetermined conditions depending on the desired cheese.

[0006] For the rest of this article, we will focus mainly on the molding process. This process is carried out by an industrial machine, commonly called a molder, after receiving the quantity of mixture required for molding. Such molders allow a variable number of cheeses to be molded in a single operation.

[0007] Before being transferred to the molding machine, the mixture is contained in a tank. It is known that the mixture contains several products that can settle. In order to avoid any heterogeneity, the tanks are continuously stirred, this making it possible to greatly reduce the heterogeneity.

[0008] Alternatively or in addition, it is known to proceed with the molding of a vat in a predetermined time in order to minimize, or even eliminate, any variation in dry extract between the first and last cheeses molded from said vat. Known molding systems thus include timing means to guarantee a molding rate sufficient to respond to this problem.

[0009] Furthermore, the standard deviation of the molders is an important profitability factor for manufacturers, who are constantly seeking to improve it to lower their cost price or increase their margin. Some cheeses are also sold by the piece, and not by weight. In this case, the cheeses must respect a minimum weight below which the cheeses cannot be sold. Consequently, molding precision is a determining factor in controlling the cheese manufacturing chain. Despite the efforts made by manufacturers to achieve molding precision, in practice, significant differences in molding weight are observed, particularly at the beginning and end of molding from the same vat and at each change of vat feeding the molder.

[0010] However, despite the mixing and / or the timing of the molders, the perfect homogeneity of the curd / whey mixture is not constant due to the evolution of the curd / whey proportions during the different molding operations, which leads to disparities in weight or consistency after molding. Statement of the invention

[0011] The invention aims to remedy the drawbacks of the state of the art and to propose a more precise molding system making it possible to control the standard deviation of the cheeses thus molded.

[0012] To do this, according to a first aspect of the invention, a molding system is proposed, for example for molding cheese, comprising upstream a tank containing a mixture of curd and serum, and downstream a molder, the tank and the molder being connected by a mixture transfer circuit, characterized in that the mixture transfer circuit passes through a mixture filtration device to extract part of the serum and control the proportions of curd and serum in a filtered mixture transferred to the molder.

[0013] Thanks to such a combination of characteristics, it is possible to filter the serum by the filtration device and make the curd / serum mixture uniform.

[0014] According to one embodiment, the filtration device comprises at least one filtration chamber configured to be crossed by the mixture of curd and serum, a filtrate chamber configured to recover a filtrate from the filtration chamber, and a filtering wall between the filtration chamber and the filtrate chamber. The filtrate is composed essentially of serum extracted from the curd / serum mixture.

[0015] According to one embodiment, the filter wall is screened and / or permeable. It can be composed of one or more elements, mobile or fixed, static or dynamic.

[0016] According to one embodiment, the filtrate chamber is connected to a discharge circuit to a discharge tank. This discharge tank makes it possible to recover the serum in order to treat it later.

[0017] According to one embodiment, the molding system comprises counter-pressure means configured to maintain a counter-pressure in the filtrate chamber so as not to clog the filter wall.

[0018] According to one embodiment, the discharge circuit comprises a siphon. This siphon is configured so as to maintain a counter-pressure in the filtrate chamber so as to ensure that the filter wall is not clogged.

[0019] According to one embodiment, the evacuation circuit comprises one or more vents, in particular at the high point of the siphon and / or at the top of the curd line so as not to trap air. Preferably, the vent(s) are collected by a pipe which falls back into a collecting tank, to allow the vents to be washed after use and the washing product to be returned to the collecting tank.

[0020] More generally, it is possible to provide a connection to a washing circuit capable of supplying the evacuation circuit with a washing liquid, this washing circuit being able to lead to a collection tank as described previously.

[0021] According to one embodiment, the cheese molding system comprises filtration regulation means capable of modulating: • a pressure difference between the filtration chamber and the filtrate chamber; and / or • permeability of the filter wall.

[0022] According to one embodiment, the filtration regulation means comprise at least one modulating valve. According to one embodiment, the modulating valve is capable of modulating a flow rate of filtrate discharged from the filtrate chamber via the discharge circuit, so as to control the pressure difference between the filtration chamber and the filtrate chamber.

[0023] According to one embodiment, the cheese molding system comprises at least one curd / whey proportion sensor making it possible to deliver a signal representative of the proportions of curd and whey downstream of the filtration device. The operating principle of the turbidimeter is indifferent here, and can implement, for example, optical measurements of diffuse reflection or light absorption, or electrical measurements.

[0024] According to one embodiment, the filtration regulation means are controlled as a function of the signal from the curd / serum proportion sensor.

[0025] According to one embodiment, the transfer circuit has at least one and preferably at least two control means, such as sights, placed upstream and / or downstream of the filtration device, making it possible to control the proportions of curd and serum in the mixture.

[0026] According to one embodiment, the cheese molding system comprises a vent circuit connected to the transfer circuit and / or the filtration device.

[0027] According to one embodiment, the cheese molding system comprises a circuit for cleaning all of the circuits in the system.

[0028] According to one embodiment, each circuit comprises at least one valve, manual or motorized, in order to compartmentalize the cheese molding system if necessary, during cleaning for example.

[0029] According to one embodiment, the filtration device has a filtration flow rate greater than or equal to 3 m3 / h, preferably greater than or equal to 6 m3 / h, and / or less than or equal to 15 m3 / h, preferably less than or equal to 12 m3 / h. More preferably, the filtration device is configured to ensure a filtration flow rate substantially equal to 9 m3 / h, the flow rate being able to vary by plus or minus 0.5 m3 / h.

[0030] According to one embodiment, the filtration device is completely removable, for inspection or cleaning for example.

[0031] According to one embodiment, the filtration device comprises interchangeable connecting parts, allowing adaptation to various architectures of the different cheese molding systems. BRIEF DESCRIPTION OF THE FIGURES

[0032] Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended figures, which illustrate: • [Fig.l]: a diagram of a cheese molding system including a filtration device; • [Fig.2]: a longitudinal sectional and isometric perspective view of a filtration device according to an embodiment used in the molding system of [Fig.l]; • [Fig.3]: a detailed view of [Fig.2]; • [Fig.4]: a rear isometric perspective view of the filtration device of [Fig.2].

[0033] For clarity, identical or similar elements are identified by identical reference signs throughout the figures. DETAILED description of embodiments

[0034] In [Fig.l] is illustrated a cheese molding system 8 comprising a tank 10 configured to contain a mixture of curd and whey, a molder 12 configured to mold the mixture of curd and whey in molds and a transfer circuit 14 connecting the tank 10 to the molder 12. During its operation during the molding operations, the mixture of curd and whey therefore circulates from the tank 10 located upstream of the transfer circuit 14 to the molder 12 located downstream of the transfer circuit 14, circulating via the transfer circuit 14.

[0035] According to the invention, the molding system 8 comprises a filtration device 18 placed on the path of the transfer circuit 14 so that the curd / whey mixture circulating in the transfer circuit 14 from the tank 10 to the molder 12 passes through the filtration device 18.

[0036] The molding system 8 comprises a transfer pump 16 configured to transfer the mixture of curd and whey from the tank 10 to the molder 12 via the transfer circuit 14. In this embodiment, the transfer pump 16 is located on the transfer circuit 14, directly downstream of the tank 10 and upstream of the filtration device 18.

[0037] The filtration device 18 makes it possible to reduce the quantity of serum in the mixture of curd and serum coming from the tank 10 if necessary, so that the predetermined proportions of curd and serum of the mixture transferred to the molder 12 are respected.

[0038] In order to measure the proportions of curd and serum in the curd / serum mixture, a curd / serum proportion sensor 22 is placed directly downstream of the filtration device 18, or more generally between an outlet of the filtration device 18 and the molder 12. In this embodiment, the curd / serum proportion sensor 22 comprises at least one turbidimeter.

[0039] The cheese molding system 8 comprises an evacuation circuit 20 comprising filtration regulation means 24. The evacuation circuit 20 makes it possible to create a pressure difference within the filtration device 18 and thus generate the extraction of the excess serum in the mixture within the filtration device 18 then to evacuate it towards an evacuation or recovery tank 25 located for example at the level of the molder 12.

[0040] The serum from cheese production is carefully recovered so that it can be recycled. This serum can be used, for example, to produce other cheeses such as whey cheeses. The whey industry has also grown considerably in recent decades, so that technological advances in the food industry have made it possible to resolve the problems of recycling whey by enabling the extraction of the proteins it contains. The serum can thus be used to produce whey powder, whey proteins, whey protein fractions, lactose such as pharmaceutical lactose, milk permeates or lactose derivatives.

[0041] The evacuation circuit 20 recovers the excess serum via a tapping 21 in the filtration device 18. This tapping 21 consists of a connection of a pipe of the evacuation circuit 20 in the filtration device 18, preferably at a vertically low point of the filtration device 18 forming a gravity evacuation of the liquid serum.

[0042] In this embodiment, it will be noted that there are three tapping interfaces located vertically under the filtration device 18, in particular under a cylindrical filtrate chamber 36. In this embodiment, a single tapping is made to connect it to the evacuation circuit 20. Such a configuration makes it possible to provide the possibility of providing several tappings or connections to the evacuation circuit 20 depending on the desired flow rate.

[0043] The molding system 8 is controlled by a control unit (not shown) or automaton to control in particular the filtration of the curd / whey mixture by the filtration device 18. In particular, the curd / whey proportion sensor 22 is connected to the filtration regulation means 24 and is capable of delivering a signal to the filtration regulation means 24 depending on the proportions of curd and whey in the filtered mixture. In general, the control unit is dedicated to controlling the molding system 8, which control unit is integrated and communicates with a control unit of the molder 12. In a preferred configuration, the control unit is configured to control at least at regular intervals, preferably continuously, the values ​​measured by the curd / whey proportion sensor 22 so as to adjust predetermined parameters of the molder 12 directly, that is to say immediately or without delay.These predetermined parameters may be, for example, the volume of the molding chamber in the molder, commonly called a "former", the rate and / or the flow rate of the filtration regulation means 24. In the case of the volume of the former, this may be controlled by means of a motorization such as a brushless motor or geared motor, called in Anglo-Saxon terms "brushless".

[0044] The filtration regulation means 24 comprise for example at least one modulating valve 26 which makes it possible, by its action, to control the quantity of serum evacuated by the evacuation circuit 20. In other words, thanks to the curd / serum proportion sensor 22, it is possible to control the modulating valve 26, here a membrane regulation valve, which makes it possible to exit from the filtration device 18, and more generally from the transfer circuit 14, a necessary flow of serum in order to have at the inlet of the molder 12 a homogeneous curd / serum mixture according to a setpoint entered in the associated automaton or control unit.

[0045] The evacuation circuit 20 comprises a siphon 23 located near the tapping 21. In particular, the pipe of the evacuation circuit 20 connected to the filtration device 18 locally has an inverted “U” shaped bend forming a siphon 23. The siphon 23 is located at a level vertically above the filtration device 18 corresponding to a predetermined height. Preferably, the height of the siphon 23 is adjustable. The siphon 23 makes it possible, in association with the filtration regulation means 24, to maintain a counter-pressure in the filtration device 18. filtration 18 so as to prevent the curd from clogging said filtration device 18. Preferably, the discharge circuit 20 is configured so that the height of the siphon 23 is variable. Indeed, several parameters external to the molding system 8 are likely to significantly modify the nature of the milk used. This is particularly the case depending on the seasons (outside temperature, humidity level, etc.). As a result, the milk can be of different natures, for example more or less dry or more or less sticky depending on the seasonality, the protein materials and the fats composing the milk. For example, the height of the siphon 23 could be at a low height when the environment is dry; or at a higher height depending on the seasonality.The height of the siphon 23 thus makes it possible to influence the filtration result because it allows a certain control of the clogging of the filter wall, and consequently makes it possible to vary the flow rate.

[0046] The pipe of the evacuation circuit 20 being, on the one hand, connected to the filtration device 18 at a vertically low point of the filtration device 18 forming a gravity evacuation of the liquid serum, and on the other hand having a siphon located at a level vertically above the filtration device 18, said pipe of the evacuation circuit 20 comprises a lower elbow 23' in the shape of a "U" located between said connection and the siphon 23. This lower elbow has a removable connection of two portions of pipes so as to allow easy disassembly, or even allow maintenance of the pipe in the event of residues which may remain locally blocked in this lower elbow 23'.

[0047] In the case where several tappings 21 are produced by the evacuation circuit 20 with the filtration device 18 and in particular with the filtrate chamber 36, each tapping 21 is connected to a siphon 23, common to the different tappings or distinct, mounted in this case in parallel, and each having characteristics similar to the siphon 23 described with reference to the figures.

[0048] The modulating valve 26 forming the filtration regulation means 24 is connected to the evacuation circuit pipe 20 connected to the filtration device 18 via the connection 21. The lower elbow 23' and the siphon 23 are located between the connection 21 and the filtration regulation means 24, in particular here the modulating valve 26. In other words, the modulating valve 26 is located at the outlet of the siphon 23 which is controlled by the turbidimeter 22. In this way, the flow rate of the serum is modulated so as to have a uniform mixture at the outlet of the filtration device 18.

[0049] In this embodiment, the cheese molding system 8 also comprises a ventilation and maintenance circuit 28. The ventilation and maintenance circuit 28 is configured to circulate a fluid such as a gas, for example air, within the filtration device 18 via vents 29. In particular here, the ventilation circuit 28 and maintenance circuit allows air to circulate also within the transfer circuit 14 and the evacuation circuit 20. Alternatively to air, other neutral gases compatible with food use could be used.

[0050] Vents 29 are mounted on each of the upstream and downstream flanges 27A, 27B of the filtration device 18, opening inside the filtrate chamber 36, at the top of the siphon 23 and downstream of the sensor 22 relative to the transfer circuit 14 so as not to trap air (see the ventilation circuit 28 in [Fig.l] connecting each of the vents 29). The vents 29 are collected by a pipe of the ventilation circuit 28 which opens towards a recovery tank of the molder 12, because these vents 29 must be washed after use and the return of the washing product is collected by the tank of the molder 12 which takes up washing products.

[0051] A washing circuit 30 also equips the molding system 8. The washing circuit 30 is connected to all or part of the transfer circuit(s) 14, filtration 20 and / or aeration 28 in order to circulate a washing liquid therein. Such a washing operation can be carried out at a predetermined frequency. In particular, the control unit of the molder 12 is configured so as to ensure a repeated washing phase at predefined intervals of the molder 12, preferably of the molder 12 and of the filtration device 18 concomitantly.

[0052] A washing line 31 of the washing circuit 30 dedicated to washing the filtration device 18 (see [Fig.l]) is positioned so as to be connected between, on the one hand, an existing washing line 31' of the molding machine 12, and on the other hand a line of the evacuation circuit 20. This cleaning system makes it possible to wash the filtration device 18 against the current.

[0053] Preferably, all or part of the transfer 14, filtration 20, aeration 28, and washing 30 circuits comprise manual valves 32 in order to allow an operator to intervene quickly and easily on the associated circuit.

[0054] Viewfinders 33 allow an operator to quickly check the appearance of the mixture of curd and whey upstream and / or downstream of the filtration device 18, or more generally along the path of the transfer circuit 14.

[0055] Referring to Figures 2 to 4, an exemplary embodiment of a filtration device 18 is illustrated.

[0056] The filtration device 18 comprises a filtration chamber 34 connected on either side to the transfer circuit 14 by connecting connectors 35, in particular an upstream connecting connector 35A and a downstream connecting connector 35B. When in use, the filtration chamber 34 is thus crossed by the mixture of curd and serum from an inlet located at the upstream connecting connector 35A where the mixture enters unfiltered to an outlet of the filtered mixture located at the downstream connecting connector 35B. The direction of circulation of the curd / serum mixture is illustrated by arrows F on [Fig.2].

[0057] The filtration chamber 34 is contained in a filtrate chamber 36 which surrounds said filtration chamber 34. The filtration chamber 34 extends from one side to the other of said filtrate chamber 36, passing through it. This filtration chamber 34 is here of cylindrical shape, and itself contained in the filtrate chamber 36, these two chambers 34, 36 extending coaxially. In practice, each of these chambers is delimited by a tubular body mounted concentrically and coaxially with respect to a longitudinal reference axis, each of these tubular bodies being connected at their upstream and downstream ends by an upstream flange 27A and a downstream flange 27B. In this way, the upstream flange 27A ensures a rigid connection between the two tubular bodies of the chambers 34, 36 and the downstream flange 27B ensures a rigid connection between the two tubular bodies of the chambers 34, 36.These two flanges 27A and 27B are connected together by clamping tie rods 27' extending parallel to the longitudinal reference axis distributed homogeneously around and outside the chambers 34, 36. These flanges also form supports at connection interfaces, such as vents 29 and upstream 35A and downstream 35B connection fittings.

[0058] The filtration chamber 34 and the filtrate chamber 36 are separated by a filter wall 38 delimiting the cylindrical surface of the filtration chamber 34. The filter wall 38 can be screened or permeable, and made of different materials.

[0059] The operation of the molding system 8 will be better understood upon reading the description below.

[0060] The mixture of curd and serum, stirred in the tank 10, is transferred from the tank 10 to the molder 12 by the transfer circuit 14 using the transfer pump 16. During the transfer of the mixture of curd and serum through the transfer circuit 14, the curd / serum mixture passes through the filtration device 18 and then passes through a portion of the transfer circuit 14 controlled by the curd / serum proportion sensor 22 placed at the outlet of the filtration device 18.

[0061] If the curd / serum proportion sensor 22 measures too high a proportion of serum in the filtered mixture at the outlet of the filtration device 18, it transmits an opening command to open, or open further, the modulating valve 26, which allows the discharge circuit 20 to discharge the filtrate formed from serum to the discharge tank 25, and to reduce the pressure in the discharge circuit 20 upstream of the modulating valve 26, and in the filtrate chamber 36. A pressure difference is established or increases between the filtration chamber 34 and the filtrate chamber 36, which establishes or increases the flow through the filter wall 38, and thus reduces the proportion of serum in the filtered mixture at the outlet of the filtration chamber 34 and the filtration device 18.

[0062] When the curd / serum proportion sensor 22 measures a proportion of whey below a predetermined threshold, the curd / whey proportion sensor 22 transmits a closing command to close the modulating valve 26, or close it further.

[0063] The cheese molding system 8 therefore makes it possible to modulate the flow rate of serum discharged so as to have a homogeneous filtered mixture at the outlet of the filtration device 18. In other words, thanks to the curd / serum proportion sensor 22 it is possible to control a modulating valve 26, here a membrane regulating valve, which makes it possible to output the necessary flow rate of serum in order to have at the inlet of the mixer 12 a homogeneous curd / serum mixture according to a setpoint entered into the automaton.

[0064] The curd / whey proportion sensor 22 located downstream of the filtration device 18 relative to the transfer circuit, this allows a control of the value of proportions predetermined by the control unit. Thanks to the operation of the molding system 8, the proportions of curd and whey of the filtered mixture are thus rebalanced around a predetermined value tending to obtain a homogeneous curd / whey mixture for molding.

[0065] As illustrated in [Fig.2], the filtration device 18 comprises vents 29 allowing it to be connected to the ventilation circuit 28.

[0066] According to a variant, the filtration device 18 comprises at least one tapping 21.

[0067] The filtration device 18 is of variable size according to requirements. Furthermore, the connecting connectors 35 forming the inlet and outlet of the filtration device 18 can be of standard, or even standardized, dimensions, so that said filtration device 18 is adaptable to most existing cheese molding systems 8.

[0068] The filtration device 18 has a filtration flow rate greater than or equal to 3m3 / h, preferably greater than or equal to 6 m3 / h, and / or less than or equal to 15 m3 / h, preferably less than or equal to 12 m3 / h. The dimensions of the filtration device 18 will preferably be chosen as a function of the targeted molding flow rate of the molding machine 12. For example, in this embodiment, a length of the filtration device 18, corresponding to an axial length of the filtration chamber 34 but also to an axial length of the filtrate chamber 36 and of the filtering wall 38, is equal to 950mm, for a molding flow rate of the molding machine 12 of 9m3 / h.

[0069] Naturally, the examples shown in the figures and discussed above are given for illustrative purposes only and are not limiting. It is explicitly provided that the different embodiments illustrated can be combined with each other to propose others.

[0070] According to a variant not illustrated, the cheese molding system 8 can inject a portion of the filtered serum into the transfer circuit 14 in order to rebalance the proportions of the curd / serum mixture if the curd is present in too large a proportion.

[0071] According to another variant, the filtration device 18 comprises a filtration chamber 34 crossed by the curd / serum mixture, a filtrate chamber 36 and a filter wall 38 with variable porosity interposed between the filtration chamber 34 and the filtrate chamber 36. The variation in porosity can be obtained, for example, by varying a relative positioning of two perforated grids so as to vary the alignment of the perforations of the two grids and, thus, the passage section through the filter wall 38. A control makes it possible to control the relative positioning of the two grids as a function of the measurements of the proportion of curd and serum of the mixture filtered by the curd / serum proportion sensor 22. This variant, however, requires specific arrangements to avoid clogging of the filter wall.

[0072] The molding system 8 according to the invention provided with such a filtration device 18 therefore offers a large number of advantages, and in particular allows: • to standardize a curd / whey mixture upstream of the molder 12 carrying out the molding operations; • for the molder 12 to always have the same curd / whey ratio to be processed; • to significantly reduce the standard deviation on molded cheeses because the molder 12 always treats the same curd / whey ratio; • for the cheesemaker, to refine the weight of his cheese very precisely and regularly and thus limit the loss linked to excessive weight of the cheese; • to standardize the dry extract of the cheese (standardization of cheeses) in terms of texture; • to be able to adapt such a filtration device 18 to existing equipment and therefore to be able to adapt the invention to existing molding lines, allowing a retrofit without major modification; • to offer a self-washing solution; • be fully removable and dismantled to easily carry out inspection, maintenance and / or cleaning operations; • to be easily short-circuited if necessary.

[0073] It is emphasized that all features, as they emerge for a person skilled in the art from the present description, the drawings and the attached claims, even if they have been specifically described only in relation to other determined features, both individually and in any combinations, may be combined with other features or groups of features disclosed herein, provided that this has not been expressly excluded or that technical circumstances make such combinations impossible or devoid of sense.

Claims

Claims

1. Molding system (8), for example for molding cheese, comprising upstream a tank (10) capable of containing a mixture of curd and serum, and downstream a molder (12), the tank (10) and the molder (12) being connected by a transfer circuit (14) for the mixture, characterized in that the transfer circuit (14) for the mixture passes through a filtration device (18) for the mixture to extract part of the serum and control the proportions of curd and serum in a filtered mixture transferred to the molder (12).

2. Molding system (8) according to claim 1, characterized in that the filtration device (18) comprises at least one filtration chamber (34) configured to be crossed by the mixture of curd and serum, a filtrate chamber (36) configured to recover a filtrate from the filtration chamber (34), and a filter wall (38) between the filtration chamber (34) and the filtrate chamber (36).

3. Molding system (8) according to claim 2, characterized in that the filter wall (38) is screened and / or permeable.

4. Molding system (8) according to any one of claims 2 to 3, characterized in that the filtrate chamber (36) is connected to an evacuation circuit (20) to an evacuation tank.

5. Molding system (8) according to claim 4, characterized in that the evacuation circuit (20) comprises - a siphon (23); and / or - at least one vent (29); and / or - a connection to a washing circuit (30) capable of supplying the evacuation circuit (20) with a washing liquid.

6. Molding system (8) any one of claims 2 to 4, characterized in that it comprises filtration regulation means (24) configured to modulate: - a pressure difference between the filtration chamber (34) and the filtrate chamber (36); and / or - a permeability of the filter wall (38).

7. Molding system (8) according to claim 6, characterized in that the filtration regulation means (24) comprise at least one modulating valve (26).

8. A molding system according to claim 7 in combination with claim 4, characterized in that the modulating valve (26) is configured to modulate a flow rate of filtrate discharged from the filtrate chamber (36) through the discharge circuit (20).

9. Molding system (8) according to any one of the preceding claims, characterized in that it comprises at least one curd / serum proportion sensor (22), preferably comprising a turbidimeter, making it possible to deliver a signal representative of the proportions of curd and serum downstream of the filtration device (18).

10. Molding system (8) according to claim 9 in combination with any one of claims 6 to 8, characterized in that the filtration regulation means (24) are controlled as a function of the signal from the curd / whey proportion sensor (22).

11. Molding system (8) according to any one of the preceding claims, characterized in that it comprises an aeration circuit (28) connected to the transfer circuit (14) and / or to the filtration device (18) by at least one vent (29).

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