Tool system, fluid module and dialysis machine

Abstract

A tooling system (72) for producing an injection-molded fluid plate (18) is specified, wherein the tooling system (72) comprises a first mold plate (74) and a second mold plate (76) forming an upper and lower part of an injection mold (70) and being movable along a main demolding direction, two base slides (78, 80) arranged on opposite sides of the injection mold (70) and movable in a direction transverse to the main demolding direction, and a set of at least two different first and second interchangeable slides (82, 84) that can be positioned on opposite sides of the injection mold (70) and that are movable in a direction transverse to the main demolding direction and transverse to the direction of travel of the base slides (78, 80).The first and second changeover valves (82, 84) have extensions for forming flow channels, with the different first changeover valves (82) and the different second changeover valves (84) differing in the number and / or length of these extensions. A fluid module (10) and a dialysis machine (40) are also specified.

Description

[0001] The invention relates to a tooling system for manufacturing an injection-molded fluid plate, a fluid module for use as an extracorporeal pressure monitoring system in a dialysis machine, and a dialysis machine.

[0002] Dialysis machines transport blood from a patient through a fluid line to a dialyzer and back to the patient. The dialysis machine measures pressure at specific points along the fluid line. Additionally, the fluid line contains chambers, called drip chambers, in which a fluid level can be set via pressure regulation using valves.

[0003] Depending on the level of development, different functionalities are implemented, which are reflected in the number of pressure sensors used and in the number of valves available for regulation.

[0004] To realize the different expansion stages, it is known to manufacture a fluid module that meets the requirements for a maximum expansion stage, whereby in less extensive expansion stages the unnecessary fluid channels and connections are closed, usually by pressing steel balls into the unnecessary channels to close them.

[0005] A disadvantage of this solution is that the installation is very complex. Furthermore, there is a risk that cracks will develop around the balls over time, leading to leaks in the system.

[0006] A reliable solution would be to manufacture different fluid modules for each expansion stage. However, this solution is very expensive, as a separate tool would be required for each expansion stage.

[0007] It is therefore an objective of the invention to enable different expansion stages of a dialysis machine in a process-reliable and cost-effective manner.

[0008] This problem is solved, firstly, according to the invention, by a tooling system for producing an injection-molded fluid plate.

[0009] The fluid plate has six faces and is, in particular, cuboid in shape. A first face has several valve ports for connecting valves, and a second face, opposite the first, has several connection ports for connecting fluid hoses. A main fluid channel extends transversely through the fluid plate from a third face to a fourth face. The third and fourth faces are, in particular, opposite each other. At least some of the valve ports and at least some of the connection ports are fluidically connected to the main fluid channel.

[0010] The tooling system comprises a first mold plate and a second mold plate, which form an upper and lower part of an injection mold and are movable along a main demolding direction, two base slides arranged on opposite sides of the injection mold and which are movable in a direction transverse to the main demolding direction, and a set of at least two different first and second interchangeable slides, which can be positioned on opposite sides of the injection mold and which are movable in a direction transverse to the main demolding direction and transverse to the direction of travel of the base slides.

[0011] The first and second mold plates depict the connection ports, and the base slides feature extensions for forming the main fluid channel. The first set of changeover slides have geometries for forming the valve seats and extensions for creating flow channels leading from the valve seats to the main fluid channel. The second set of changeover slides has extensions for creating flow channels extending from the connection ports. The different first and second set of changeover slides each differ in the number and / or length of their flow channel extensions.

[0012] The two mold plates, the two base slides and one first and one second interchangeable slide each form a complete tool for manufacturing a fluid plate.

[0013] Due to the modularity of the system, different expansion stages can be implemented in a simple and cost-effective manner, especially by replacing the interchangeable slides.

[0014] Since the geometries of the connection spigots are present in the form plates, which are not replaced, the connection spigots are always present in the maximum number corresponding to a maximum expansion stage.

[0015] However, the fluid channels can be individually configured using the interchangeable slides according to the desired expansion stage, i.e., some of the connection ports are essentially blind.

[0016] The same applies to the valve positions, i.e., fluid channels are only formed at those valve positions that are necessary in the respective desired expansion stages.

[0017] In this way, no subsequent sealing of the unused channels, for example by balling, is necessary, which significantly reduces assembly effort compared to known solutions and simultaneously improves process reliability. The fluid module produced using the tooling system according to the invention is therefore particularly cost-effective and has a long service life.

[0018] A fluid plate produced using the tool system according to the invention includes in particular all mechanical interfaces required for different expansion stages, while the fluidic interfaces can be individually formed for different expansion stages by means of the interchangeable slides.

[0019] The basic slides and / or the interchangeable slides are each, in particular, movable coaxially to each other.

[0020] In a preferred embodiment, the changeover slides have the same number of extensions, which, however, differ in length. For example, two different extension lengths are possible. The longer extensions are suitable for forming a continuous, functional flow channel. The shorter extensions are only suitable for forming a channel opening, which, however, is not continuous, in particular a blind hole. These channel openings serve only to prevent material accumulations that could lead to sink marks, especially in the area of ​​the connection nozzles.

[0021] According to one embodiment, the geometry of at least one additional valve position is represented in each of the two base slides. Thus, valves can be mounted not only on the first side surface, but also on the third and fourth side surfaces of the fluid plate. This allows the dimensions of the fluid plate to be reduced, while maintaining the same number of fluid positions, compared to a fluid plate with valve positions only on one side. This also has a beneficial effect on the material required for manufacturing the fluid plate.

[0022] Depending on the number of valve positions, extensions may be present in the base slide to form a flow channel from the valve position to a connection nozzle.

[0023] Starting from each fluidically connected valve position, at least two channels extend, forming an inlet and an outlet. In the case of a 3 / 2-way valve, three channels extend from the valve position.

[0024] According to one embodiment, one of the two mold plates has ports for connecting sensors. This makes it possible to attach sensors, especially pressure sensors, directly to the fluid plate.

[0025] The connections for attaching sensors are formed, for example, by an opening in front of which a flow channel extends, and a groove surrounding the opening for inserting a seal.

[0026] The mold plate, in which the connections for attaching sensors are formed, has projections that extend up to the level of the valve seats when the mold is closed. This means that whether a continuous flow channel to the valve seat is created depends on these projections in the slide valve.

[0027] The problem is further solved according to the invention by a fluid module for use as an extracorporeal pressure monitoring system in a dialysis machine, comprising a fluid plate, which is produced in particular using a tooling system according to the invention. The fluid plate has six side surfaces and is in particular cuboid-shaped, wherein several valve ports for connecting valves are provided on a first side surface and several connection ports for connecting fluid hoses are formed on a second side surface opposite the first side surface, and wherein a main fluid channel extends transversely through the fluid plate from a third side surface to a fourth side surface of the fluid plate. The third and fourth side surfaces are in particular opposite orientations.At least two valve positions of the fluid plate are occupied by a valve, wherein at least two valve positions occupied by a valve are flow-connected to the main fluid channel of the fluid plate, and wherein each occupied valve position is flow-connected to at least one connection port.

[0028] By having several valve positions on the fluid plate, at least two of which are occupied, a modular design of the fluid module is achieved, allowing for several expansion stages of the fluid module.

[0029] When the fluid plate is manufactured using the tooling system according to the invention, the modularity is also reflected in the number of connection ports. In particular, the number of connection ports corresponds to a maximum expansion stage of the fluid plate, although not all connection ports necessarily lead into a continuous fluid channel. This is only the case if the fluid channels were also manufactured according to a maximum expansion stage.

[0030] As already described in connection with the tooling system, an additional valve position can be located on both the third and fourth side surfaces. Each valve position houses a valve. The valves are connected to the main fluid channel via a connecting nozzle, for example. This results in a particularly compact design for the fluid module. The valves also seal the main fluid channel laterally, which further contributes to improved process reliability, as the valves provide a significantly more reliable seal than, for example, sealing the channel with a ball joint.

[0031] The fluid module can comprise a printed circuit board to which the fluid plate is attached. Connectors are arranged on the printed circuit board, which electrically contact the valves when they are positioned at the valve locations on the fluid plate. The printed circuit board thus serves as a carrier for both the fluid plate and the valves.

[0032] According to a further embodiment, connections for attaching pressure sensors are provided on a fifth side surface of the fluid plate, and at least one first pressure sensor is arranged on the circuit board, with one of the connections formed in the fluid plate being in contact with the first pressure sensor. Thus, a connection between a connection and the first pressure sensor is automatically established during assembly of the fluid module.

[0033] The pressure sensor, in particular a sensitive area of ​​the pressure sensor, is sealed axially to the outside, for example by a sealing ring which is arranged in a groove in the fluid plate.

[0034] In particular, a valve is arranged in the flow path between the first pressure sensor and the main fluid channel.

[0035] Starting from at least one connection port, a flow path leads, for example, to a valve location, in particular to a valve location equipped with a valve, and via the valve located at the valve location, the flow path continues from the valve location to the main fluid channel, with a flow channel branching off between the connection port and the valve location to the first pressure sensor. This means that the main fluid channel can be fluidically separated from or connected to the connection port by the valve.

[0036] Since the fluid module contains several such interconnected valves and pressure sensors, the main fluid channel can be flow-connected to one connection port and flow-separated from the remaining connection ports, depending on the valve position. This allows for the implementation of various operating modes.

[0037] The problem is further solved according to the invention by a dialysis machine with a fluid module according to the invention, wherein the dialysis machine has a venous blood chamber and an arterial blood chamber.

[0038] The venous blood chamber is fluidically connected to a connection port of the fluid plate via a line, wherein a flow path leads from the connection port via a valve arranged at a first valve location to the main fluid channel, and wherein a flow channel branches off between the connection port and the valve location to a first pressure sensor.

[0039] The arterial blood chamber is fluidically connected via a line to another connection port of the fluid plate, from which a flow path leads to a valve located at another valve position, with a flow channel branching off between the valve position and the connection port to another pressure sensor.

[0040] At two further valve positions, a 3 / 2-way valve is connected, each of which is connected to the main fluid channel via one connection, in particular an NC connection, and to a common connection port via another connection, in particular an NO connection, and to a separate connection port via a third connection, to which a pneumatic pump is connected.

[0041] With such a dialysis machine, depending on the switch position, air from the environment can be drawn into the main fluid channel or released from the main fluid channel into the environment in order to regulate the pressure in the venous blood chamber and / or the arterial blood chamber.

[0042] Further advantages and features of the invention will become apparent from the following description and from the accompanying drawings, to which reference is made. The drawings show: - Fig. 1 a fluid module according to a first development stage according to the invention, which has a fluid plate which was produced by means of a tool system according to the invention, - Fig. 2 a fluid diagram of a dialysis machine according to the invention with a fluid module according to the in Fig. 1. Development stage shown, - Fig. 3 a top view of the fluid module from Fig. 1, - Fig. 4 a sectional view along line AA in Fig. 3, - Fig. 5 a cross-section in the area of ​​a pressure sensor of the fluid module Fig. 1, - Fig. 6 a cross-section through an alternative fluid module in the area of ​​a pressure sensor, - Fig. 7 a cross-section through yet another alternative fluid module in the area of ​​a pressure sensor, - Fig. 8 a cut along line CC in Fig. 3, - Fig. 9 an electrical contacting of a valve, - Fig. 10 a side view of the fluid module in the area of ​​a laterally mounted valve, - Fig. 11 a cut along line DD in Fig. 10, - Fig. 12 a section along line EE in Fig. 10, - Fig. 13 a detailed view of area F in Fig. 12, - Fig. 14 a side view of the fluid module in the area of ​​a laterally mounted valve, - Fig. 15 a cut along line GG in Fig. 14, - Fig. 16 an alternative cut along line GG in Fig. 14 - Fig. 17 a tool system for manufacturing a fluid plate for the in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15 to Fig. 16 fluid modules shown, - Fig. 18 one by means of the tool system from Fig. 17 manufactured fluid plates, and - Fig. 19 the fluid plate from Fig. 18 in another view.

[0043] Fig. Figure 1 shows a fluid module 10 suitable for use as an extracorporeal pressure monitoring system in a dialysis machine.

[0044] However, the Fluid Module 10 is not limited to use in a dialysis machine. In principle, the Fluid Module 10 is suitable for pressure monitoring in various applications.

[0045] At the in Fig. The fluid module 10 shown in Figure 1 is one of several possible expansion stages, as will become clear in the course of the following description.

[0046] The in Fig. The variant shown in section 1 represents a basic variant.

[0047] The fluid module 10 has a circuit board 12, five valves 14-1, 14-2, 14-3, 14-4, 14-5, which are in particular solenoid valves, several pressure sensors 16-1, 16-2, 16-3, for example three pressure sensors, and a fluid plate 18, which was manufactured using a tooling system according to the invention. The tooling system will be described in more detail below with reference to the Fig. 17 described.

[0048] The pressure sensors 16-1, 16-2, 16-3 are attached to the circuit board 12, in particular soldered.

[0049] The fluid plate 18 is also attached to the circuit board 12, in particular by screws.

[0050] Valves 14-1, 14-2, 14-3, 14-4, 14-5 are each arranged at different valve positions 20 of the fluid plate.

[0051] The fluid plate 18 is essentially cuboid in shape and has six side surfaces 22, 24, 26, 28, 30, 32.

[0052] On a first side surface 22 there are several valve positions 20 (see Fig. 3) trained, of whom in Fig. 1 three are occupied by valves 14-1, 14-2, 14-4.

[0053] On a second side surface 24 opposite the first side surface 22, several connection ports 34-1, 34-2 and 34-4 to 34-9 are formed. A further connection 34-3 is directed downwards, that is, it is located on side surface 30.

[0054] A further valve position 20 is provided on a third side surface 26. A valve 14-3 is arranged at this valve position 20.

[0055] A valve position 20 is also provided on a fourth side surface 28, at which a valve 14-5 is arranged.

[0056] Connections 36 are located on the fifth side surface 30 of the fluid plate 18 (see Fig. 4) Connections are provided for the pressure sensors 16-1, 16-2, 16-3. The pressure sensors 16-1, 16-2, 16-3 are specifically connected to terminals 36.

[0057] Valves 14-1, 14-2, 14-3, 14-4, 14-5 are each flow-connected to one of the connection ports 34-1 to 34-9.

[0058] A main fluid channel 38 extends transversely through the fluid plate 18 from a third side surface 26 to a fourth side surface 28 of the fluid module 10 (see Fig. 4).

[0059] Valves 14-1, 14-2, 14-3, 14-4, and 14-5 are directly connected to the main fluid channel 38, as can also be seen from the diagram in Fig. 2 illustrated fluid diagram.

[0060] The two valves 14-3, 14-5 on the third and fourth side surfaces 26, 28 serve to close the main fluid channel 38.

[0061] Based on Fig. Figure 2, which shows a fluid diagram of a dialysis machine 40, clearly shows the structure or fluidic connection of the valve positions 20 with the pressure sensors 16-1, 16-2, 16-3 and the connection ports 34-1 to 34-9.

[0062] In the basic version, not all connection ports 34-1 to 34-9 are functionally involved in the assembly. Some of the connection ports 34-1 to 34-9 are, so to speak, blank ports. This is in Fig. 2 also illustrated by the interruption 15, which omits the unoccupied valve positions 20 and the corresponding connection nozzles.

[0063] The connection fitting 34-9 can optionally also be designed as a blanking plug.

[0064] The dialysis machine 40 includes, in addition to the fluid module 10, a pneumatic pump 42, a venous blood chamber 44, and an arterial blood chamber 46. These are specifically designed as drip chambers.

[0065] When using the fluid module 10 in a dialysis machine 40, the pneumatic pump 42 is connected to the connection ports 34-1, 34-2.

[0066] The valves 14-1, 14-5 are arranged in the flow direction between the connection nozzles 34-1, 34-2 and the main fluid channel 38.

[0067] Valves 14-1 and 14-5 are both 3 / 2-way valves.

[0068] These are connected to the main fluid channel 38, particularly via their NC connection.

[0069] The two valves 14-1, 14-5 are connected via a common connection 34-3 by means of a further connection, in particular the NO connection.

[0070] The valves 14-1, 14-5 are connected via a third connection to the connection ports 34-1, 34-2, to which the pneumatic pump 42 is connected.

[0071] Depending on the switching position of valves 14-1 and 14-5, air from the environment can be drawn into the main fluid channel 38 via the connection port 34-3, or released from the main fluid channel 38 into the environment. This serves to regulate the pressure in the venous blood chamber 44 or the arterial blood chamber 46.

[0072] In the exemplary embodiment, the blood chambers 44, 46 are connected to the connecting ports 34-8, 34-7, in particular via a line or a hose, which, however, is not shown in the figures for the sake of simplicity.

[0073] From the connection nozzle 34-8, a flow path runs via the valve 14-3 to the main fluid channel 38.

[0074] Between the connection port 34-8, to which the venous blood reservoir 44 is connected, and the valve location 20, to which the valve 14-3 is attached, a flow channel branches off to a first pressure sensor 16-1.

[0075] Via the valve 14-3, which is arranged in terms of flow between the connecting nozzle 34-4 and the main channel 38, the connecting nozzle 34-8 and thus also the venous blood chamber 44 attached to it can be flow-connected to or separated from the main fluid channel 38, depending on the switching position of the valve 14-3.

[0076] When the venous blood chamber 44 is fluidically connected to the main fluid channel 38, the level in the venous blood chamber 44 can be regulated via pressure control, in particular by using the pneumatic pump 42 to push air into or suck air out of the blood chamber 44.

[0077] The pressure sensor 16-1 detects a pressure in the associated blood chamber 44 and thus enables regulation of the pressure and therefore also of the level in the blood chamber 44.

[0078] The pressure sensor 16-2 detects the pressure in the associated arterial blood chamber 46.

[0079] Valves 14-1, 14-2, 14-4 are arranged at further valve positions 20, which are formed on the side surface 22.

[0080] The valve 14-2 is arranged in a flow path between the connection nozzle 34-6 and the main fluid channel 38.

[0081] The valve 14-4 is arranged in a flow path between the connection nozzle 34-7 and the main fluid channel 38.

[0082] Between the connection nozzle 34-7 and the valve position 20, where the valve 14-4 is located, a flow channel branches off to a further pressure sensor 16-2.

[0083] The additional pressure sensor 16-2 specifically monitors arterial pressure.

[0084] The arrangement of valves 14-1, 14-2, 14-3, 14-4, 14-5 is made up of Fig. 1 as well as from Fig. Figure 3 shows a top view of the fluid module 10.

[0085] Fig. Figure 4 shows a section through the fluid module 10 along line AA in Fig. 3.

[0086] In Fig. Figure 4 shows which valve positions 20 are fluidically connected to the main fluid channel 38 by means of the openings 48.

[0087] Furthermore, it can be seen that starting from the connections 36 for the pressure sensors 16-1, 16-2, 16-3, channels 50 extend up to the level of the valve positions 20. These channels 50 in turn lead into further channels that extend from the associated connection nozzles 34 to the valve positions 20.

[0088] The valve 14-5 is fluidically connected to the connection nozzle 34-3 by means of a channel 54 extending from the fourth side surface 28 parallel to the main fluid channel 38.

[0089] Fig. Figure 5 shows a cross-section through the fluid module 10 in the area of ​​a pressure sensor 16, in particular the pressure sensor 16-2, 16-3 connected to the valve 14-2 or 14-4. Fig. Figure 5 shows the sealing of the pressure sensor 16-2. Specifically, the pressure sensor 16-2 is sealed by an axial seal in the form of an O-ring 56.

[0090] The O-ring 56 is inserted into a recess 58 in the fluid plate 18.

[0091] The other pressure sensor 16-1 is sealed in the same way.

[0092] If additional valve positions are occupied, the pressure sensors assigned to the additional valves are sealed in the same way.

[0093] Fig. Figure 6 illustrates an alternative way of sealing the pressure sensors 16-1, 16-2, 16-3. In particular, extensions 60 are provided on the pressure sensor and on the fluid plate 18, which are fluidically connected to each other via a silicone tube 62.

[0094] Fig. Figure 7 shows an alternative way to seal the pressure sensors 16-1, 16-2, 16-3. In the case of the Fig. In the illustrated embodiment 7, a radial seal is provided. For this purpose, a projection 59 is provided on the pressure sensor, onto which an O-ring 56 is placed.

[0095] Fig. Figure 8 shows a section along line CC in Fig. 3.

[0096] This cut extends through a valve position 20, which is not occupied in the basic configuration. Therefore, channel 64, which runs from valve position 20 towards the main fluid channel 38, ends before the main fluid channel 38.

[0097] Channel 66, which also extends from the valve location, ends without any connection to another channel. If channel 66 were to continue, it would be fluidically connected to pressure sensor 16-1.

[0098] Fig. Figure 9 shows an electrical contacting of the valves 14-1 to 14-5 by means of a connector 67 which is attached to the circuit board 12, in particular soldered.

[0099] The Fig. 10, Fig. 11, Fig. 12 to Fig. Figure 13 illustrates a filter 68 arranged at connection 34-3. This filter serves to filter the fluid drawn in by the pneumatic pump 42. The filter 68 is, for example, a piece of felt or a sieve.

[0100] As shown in the detailed view in Fig. As can be seen in Figure 13, there is a recess 69 on one end face of the connection 34-3, into which the filter 68 is inserted.

[0101] A sealing element 71, in particular an O-ring, is arranged between the filter 68 and the circuit board 12. The sealing element 71 holds the filter 68 in contact with the connection 34-3 when the fluid module 10 is mounted, thus ensuring that the aspirated fluid flows completely through the filter 68.

[0102] The connector 34-3 is located directly on the circuit board 12.

[0103] The sealing element 71 also rests against the circuit board 12. Thus, the filter 68 and the sealing element 71 are held by the circuit board 12 at connection 34-3.

[0104] Circuit board 12 has a recess 73 which overlaps with the terminal 34-3. Terminal 34-3 is therefore accessible through circuit board 12.

[0105] The Fig. 14, Fig. 15 to Fig. Figure 16 illustrates two different expansion stages of the fluid module 10. In the case of the Fig. The variant shown in Figure 15 is the basic variant, in which the connecting nozzle 34-9 is designed as a blind nozzle and is therefore not fluidically connected to the main fluid channel 38.

[0106] In the Fig. In the illustrated variant 16, the claim port 34-9 is fluidically connected.

[0107] Additional sensors, measuring points or a compensation volume can be connected to the connection port 34-9, for example.

[0108] The preceding description makes it clear that the Fluid Module 10 is modular. This means that additional valves and pressure sensors can be connected to the basic version.

[0109] A particular advantage of the fluid module 10 is that the outer contours of the fluid plate 18 are constant and only the fluid channels need to be designed accordingly, depending on the desired function.

[0110] In Fig. Figure 17 illustrates an injection mold 70 for the production of a fluid plate 18. The injection mold 70 is composed of various parts of a tool system 72.

[0111] The tooling system 72 is designed in such a way that the fluid plate 18 can be manufactured in different variants in a simple and cost-effective manner in order to meet the requirements associated with the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13 to Fig. to enable the 14 different expansion stages described.

[0112] Specifically, the tool system 72 has a first mold plate 74 and a second mold plate 76, which form an upper and a lower part of an injection mold 70 and are movable along a main demolding direction. Fig. 17 the main demolding direction runs in the drawing plane, so that only the outlines of the first mold plate 74 and the second mold plate 76 are visible.

[0113] Furthermore, the tool system 72 has two base slides 78, 80, which are arranged on opposite sides of the injection molding tool 70 and which can be moved in a direction transverse to the main demolding direction.

[0114] In addition, the tool system 72 has a set of at least two different first and second change slides 82, 84, which can be positioned on opposite sides of the injection molding tool 70 and which can be moved in a direction transverse to the main demolding direction and transverse to the travel direction of the basic slides 78, 80.

[0115] The first mold plate 74 and the second mold plate 76 show the connection nozzles 34-1, 34-2 and 34-4 to 34-9.

[0116] The connection 34-3 is formed in the second mold plate 76, which forms the lower part of the tool mold.

[0117] In the basic valves 78, 80 there are extensions 86, 88 for forming the main fluid channel 38.

[0118] Furthermore, the geometry of a valve position 20 is depicted in each of the base slides 78 and 80. This geometry on the base slides 78 and 80 is shown in Fig. 17 is not directly visible, but it can be inferred indirectly from the previous figures, which show a fluid plate 18 produced by means of the injection molding tool 70.

[0119] Additionally, further extensions for forming additional channels may be present on the basic slide valves 78, 80.

[0120] The first changeover valves 82 have geometries for forming the valve positions 20 and extensions for forming flow channels leading from the valve positions 20 to the main fluid channel 38. These geometries are in Fig. 17 are not directly visible, however, these originate from Fig. 18, which shows one side of the fluid plate 18, which was formed by means of a first change slide 82.

[0121] At each valve location, 20 channel openings 94 can be seen. The first changeover valves 82 have extensions at the corresponding locations to form the corresponding flow channels.

[0122] Depending on the desired expansion stage of the fluid module 10, not all valve positions 20 are always fluidically connected.

[0123] To accommodate the various configurations, the different first interchangeable slides 82 of the tool system vary in the number and / or length of their extensions for forming flow channels. The appropriate first interchangeable slide 82 is selected depending on the desired configuration.

[0124] The same applies to the second changeover valves 84. Specifically, the second changeover valves 84 have extensions for forming flow channels that originate from the connecting nozzles 34.

[0125] The different second change slides 84 also differ in their number and / or length of extensions.

[0126] The positions of the extensions of the second change-type slide 84 are derived indirectly from Fig. 19 stand out and correspond to the position of the connecting stubs 34.

[0127] In Fig.18 also shows the connections 36 for connecting sensors, in particular the pressure sensors 16.

[0128] The corresponding geometries for forming the connections 36 are formed in one of the two mold plates 74.

[0129] The mold plate 74, in which the connections 36 for connecting the sensors are shown, has extensions that, when the mold is closed, extend up to the level of the valve positions 20. This forms the channels leading to the pressure sensors 16 in the fluid plate 18.

[0130] In addition, screw bosses 98 are provided on the fluid plate 18 on the same side as the connections 36, which serve to screw the fluid plate 18 to the circuit board 12.

[0131] The corresponding geometries for forming the screw bosses 98 are formed in the mold plate 74, which also contains the geometry for forming the connections 36.

[0132] The screw bosses 98 are located in close proximity to the terminals 36. This ensures that when the fluid plate 18 is attached to the circuit board 12, a sufficiently high pressure is exerted on the pressure sensors 16 to achieve a reliable seal.

Claims

Tool system (72) for producing an injection-molded fluid plate (18), wherein the fluid plate (18) has six side surfaces (22, 24, 26, 28, 30, 32) and is particularly cuboid in shape, wherein several valve positions (20) for connecting valves (14) are provided on a first side surface (22) and several connection nozzles (34) for connecting fluid hoses are formed on a second side surface (24) opposite the first side surface (22), and wherein a main fluid channel (38) extends transversely through the fluid plate (18) from a third side surface (26) to a fourth side surface (28) of the fluid plate (18) and at least some of the valve positions (20) and at least some of the connection nozzles (34) are fluidically connected to the main fluid channel (38), wherein the tool system (72) comprises a first mold plate (74) and a second mold plate (76),which form an upper and a lower part of an injection mold (70) and are movable along a main demolding direction, two base slides (78, 80) which are arranged on opposite sides of the injection mold (70) and which are movable in a direction transverse to the main demolding direction, and a set of at least two different first and second interchangeable slides (82, 84) which can be positioned on opposite sides of the injection mold (70) and which are movable in a direction transverse to the main demolding direction and transverse to the direction of travel of the base slides (78, 80), wherein the connecting nozzles (34) are depicted in the first mold plate (74) and the second mold plate (76), and wherein extensions (86, 88) for forming the main fluid channel (38) are provided in the base slides (78, 80), and wherein geometries for forming the main fluid channel (38) are provided on the first interchangeable slides (82). Shaping of the valve seats (20) and extensions for forming flow channels,which lead from the valve positions (20) to the main fluid channel (38), and wherein the second changeover valves (82) have extensions for forming flow channels extending from the connection nozzles (34), wherein the different first changeover valves (82) and the different second changeover valves (84) each differ in their number and / or length of the extensions for forming flow channels. Tool system (72) according to claim 1, characterized in that the geometry of at least one further valve position (20) is depicted in each of the two basic slides (78, 80). Tool system (72) according to one of the preceding claims, characterized in that connections (36) for connecting sensors are formed in one of the two mold plates (74, 76). Tool system (72) according to claim 3, characterized in that the mold plate (74, 76), in which the connections (36) for connecting sensors are formed, has extensions which extend to the level of the valve seats (20) when the tool is closed. Fluid module (10) for use as an extracorporeal pressure monitoring system in a dialysis machine (40), comprising a fluid plate (18), which is manufactured in particular with a tooling system (72) according to one of the preceding claims, wherein the fluid plate (18) has six side surfaces (22, 24, 26, 28, 30) and is in particular cuboid-shaped, wherein several valve positions (20) for connecting valves (14) are provided on a first side surface (22) and several connection ports (34) for connecting fluid hoses are formed on a second side surface (24) opposite the first side surface (22), and wherein a main fluid channel (38) extends transversely through the fluid plate (18) from a third side surface to a fourth side surface of the fluid plate (18), wherein at least two valve positions (20) of the fluid plate (18) are occupied by a valve (14),wherein at least two valve positions (20) equipped with a valve (14) are flow-connected to the main fluid channel (38) of the fluid plate (18), and wherein each occupied valve position (20) is flow-connected to at least one connection nozzle (34). Fluid module (10) according to claim 5, characterized in that a further valve position (20) is provided on the third side surface (26) and on the fourth side surface (28), wherein a valve (14) is arranged on each of the valve positions (20), and the valves (14-3, 14-5) are each connected to a connecting nozzle (34) and to the main fluid channel (38) in a flow-connected manner. Fluid module (10) according to claim 5 or 6, characterized in that the fluid module (10) comprises a printed circuit board (12) to which the fluid plate (18) is attached, wherein connectors (67) are arranged on the printed circuit board (12) which electrically contact the valves (14) when these are arranged at the valve locations (20) of the fluid plate (18). Fluid module (10) according to one of claims 5 to 7, characterized in that connections (36) for connecting pressure sensors (16) are provided on a fifth side surface (30) of the fluid plate (18) and at least one first pressure sensor (16-1) is arranged on the circuit board (12), wherein one of the connections (36) formed in the fluid plate (18) is in contact with the first pressure sensor (16-1). Fluid module (10) according to claim 8, characterized in that a valve (14-3) is arranged in the flow path between the first pressure sensor (16-1) and the main fluid channel (38). Fluid module (10) according to claim 8 or 9, characterized in that a flow path leads from at least one connection nozzle (34-8) to a valve location (20) and via the valve (14-3) arranged at the valve location (20) from the valve location (20) to the main fluid channel (38), wherein a flow channel to the first pressure sensor (16-1) branches off between the connection nozzle (34-8) and the valve location (20). Dialysis machine (40) with a fluid module (10) according to any one of claims 5 to 10, wherein the dialysis machine (40) has a venous blood chamber (44) and an arterial blood chamber (46), wherein the venous blood chamber (44) is fluidically connected via a line to a connection port (34-8) of the fluid plate (18), wherein a flow path leads from the connection port (34-8) via a valve (14-3) arranged at a first valve location (20) to the main fluid channel (38), wherein a flow channel branches off between the connection port (34-8) and the valve location (20) to a first pressure sensor (16-1), and wherein the arterial blood chamber (46) is fluidically connected via a line to a further connection port (34-7) of the fluid plate (18), from which a flow path leads to a valve arranged at a further valve location (20). Valve (14-4) leadswherein a flow channel branches off between the connection port (34-7) and the valve (14-4) to a further pressure sensor (16-2), and wherein a 3 / 2-way valve (14-1, 14-5) is connected to each of two further valve positions (20), each of which is connected to the main fluid channel (38) via one port, to a common connection port (34-3) via another port, and to a separate connection port (34-1, 34-2) via a third port, to which a pneumatic pump (42) is connected.

Images