Tool system, fluid module and dialysis machine

Abstract

The invention relates to a tool system (72) for producing an injection-molded fluid plate (18), said tool system (72) comprising: a first mold plate (74) and a second mold plate (76), which form an upper part and a lower part of an injection-molding tool (70) and can be moved in a main mold-releasing direction; two base slides (78, 80) which are arranged at opposite sides of the injection molding tool (70) and which can travel in a direction transverse to the main demolding direction; and a kit of at least two different first and second replacement slides (82, 84), each of which can be positioned at opposite sides of the injection molding tool (70) and can be advanced in a direction transverse to the main demolding direction and transverse to the direction of travel of the base slides (78, 80). Extensions for forming the flow channel are provided on the first and the second exchange slides (82, 84), wherein different first exchange slides (82) and different second exchange slides (84) differ in each case with respect to the number and / or length of their extensions for forming the flow channel. The invention further relates to a fluid module (10) and to a dialysis machine (40).

Description

Technical Field

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

[0002] The dialysis machine delivers blood from the patient to the dialyzer via a fluid line and then returns it to the patient. Pressure should be measured at specific points along the fluid line within the dialysis machine. Additionally, a chamber, known as the drip chamber, is located within the fluid line, where the fluid level can be adjusted via pressure regulation using a valve.

[0003] Different functions are implemented depending on the expansion level, which is reflected in the number of pressure sensors used and the number of valves available for regulation.

[0004] To achieve various expansion levels, it is known to manufacture fluid modules that meet the requirements of the maximum expansion level, where, in cases where the expansion level is not very broad, unnecessary fluid channels and joints are typically closed by pressing steel balls into the unnecessary channels to seal them off.

[0005] The disadvantages of this solution are that installation is very costly. Furthermore, there is a risk that cracks may form in the spherical area over time, leading to leaks in the system.

[0006] A reliable solution would be to manufacture different fluid modules for each expansion level. However, this solution would be very expensive because it would require separate tooling for each expansion stage. Summary of the Invention

[0007] Therefore, the object of this invention is to realize different expansion levels of dialysis machines in a reliable and cost-effective manner.

[0008] On the one hand, this objective is achieved according to the invention by a tool system for manufacturing injection-molded fluid plates.

[0009] The fluid plate has six sides, and is particularly cuboid in shape, with multiple valve positions for connecting valves located on a first side and multiple connecting pipes for connecting fluid hoses formed on a second side opposite to the first side. A main fluid passage extends laterally through the fluid plate, beginning on a third side and extending to a fourth side. The third and fourth sides are particularly opposite to each other. At least some of the valve positions and at least some of the connecting pipes are in fluid connection with the main fluid passage.

[0010] The tooling system includes: a first mold plate and a second mold plate, the first mold plate and the second mold plate forming an upper part and a lower part of an injection molding tool and capable of traveling along a main demolding direction; two base sliders arranged on opposite sides of the injection molding tool and capable of traveling in a direction transverse to the main demolding direction; and a kit consisting of at least two different first and second replaceable sliders, the first and second replaceable sliders being positioned on opposite sides of the injection molding tool and capable of traveling in a direction transverse to the main demolding direction and transverse to the traveling direction of the base sliders.

[0011] A connecting pipe is formed in the first mold plate and the second mold plate, and an extension for forming the main fluid channel is provided in the base slider. An extension for forming the geometry of the valve position and for forming a flow channel guiding from the valve position to the main fluid channel are provided at the first replacement slider. A flow channel originating from the connecting pipe is provided in the second replacement slider. Different first replacement sliders and different second replacement sliders differ in the number and / or length of their extensions for forming the flow channel.

[0012] Two mold plates, two base sliders, and first and second replacement sliders respectively form a complete tool for manufacturing fluid plates.

[0013] Due to the modularity of the system, different levels of expansion can be achieved in a simple and cost-effective manner, especially by replacing the slider.

[0014] Since the geometry of the connecting pipes exists in the mold plate and is not replaced, the connecting pipes always exist in the maximum number corresponding to the maximum expansion level.

[0015] However, fluid channels can be individually implemented according to the desired level of expansion by replacing the slider; that is, some connecting pipes can be considered dummy.

[0016] This also applies to valve positions, i.e., the fluid passage is only configured at the valve positions required in each desired expansion level.

[0017] In this way, there is no need to subsequently seal unwanted channels, such as with ball plugs, which significantly reduces installation costs compared to known solutions and simultaneously improves process safety. Therefore, fluid modules manufactured using the tool system according to the invention are particularly cost-effective and have a long service life.

[0018] The fluid plate manufactured by means of the tool system according to the invention specifically includes all the mechanical interfaces required for different expansion levels, and the fluid interfaces can be formed individually for different expansion levels by means of changing the slider.

[0019] The base slider and / or replacement slider can travel coaxially with each other, respectively.

[0020] In a preferred embodiment, the slider is replaced with the same number of extensions, however, the lengths of these extensions differ. For example, two different lengths of extensions are feasible. The longer extensions are suitable for forming continuous, functional flow channels. The shorter extensions are only suitable for forming discontinuous channel openings, particularly blind holes. The channel openings are only used to prevent material buildup that could lead to recesses, especially in the area of ​​connecting pipes.

[0021] According to one embodiment, the geometry of at least one additional valve position is mapped into each of the two base sliders. Therefore, valves can be attached not only to the first side of the fluid plate, but also to the third and fourth sides. Consequently, compared to a fluid plate with valve positions only on one side, the size of the fluid plate can be reduced while maintaining the same number of fluid positions, which also has an advantageous effect on the materials used to manufacture the fluid plate.

[0022] Depending on the number of valve positions, an extension may be present in the base slider to form a fluid passage from the valve position to the connecting pipe.

[0023] At least two channels forming the inlet and outlet extend from the valve position for each fluid connection. In the case of a 3 / 2-way valve, three channels extend from the valve position.

[0024] According to one embodiment, a connector for connecting the sensor is formed in one of two mold plates. This allows for the direct attachment of the sensor, particularly a pressure sensor, to the fluid plate.

[0025] The connector for connecting the sensor is formed, for example, by an opening and a groove surrounding the opening for inserting a seal, wherein a flow channel continues prior to the opening.

[0026] In particular, there is an extension in the mold plate in which a connector for connecting the sensor is formed, which extends to the height of the valve position when the tool is closed. That is to say, whether a continuous flow path to the valve position is established is related to the extension in the change slider.

[0027] According to the invention, this object is also achieved by a fluid module for use as an extracorporeal pressure monitoring system in a dialysis machine, the fluid module having a fluid plate, which is manufactured particularly by means of a tool system according to the invention. The fluid plate has six sides and is particularly cuboid in shape, wherein a plurality of valve positions for connecting valves are present on a first side and a plurality of connecting pipes for connecting fluid hoses are formed on a second side opposite to the first side, and wherein a main fluid channel extends laterally through the fluid plate from a third side to a fourth side. The third and fourth sides are particularly aligned oppositely. At least two valve positions of the fluid plate are occupied by valves, wherein the at least two valve positions occupied by valves are fluidly connected to the main fluid channel of the fluid plate, and wherein each occupied valve position is fluidly connected to at least one connecting pipe.

[0028] Because the fluid plate has multiple valve positions, at least two of which are occupied, the modular structure of the fluid module makes it possible to implement multiple expansion levels of the fluid module.

[0029] If the fluid plate is manufactured using the tooling system according to the invention, modularity is also reflected in the number of connecting pipes implemented. Specifically, the existing number of connecting pipes corresponds to the maximum expansion level of the fluid plate; however, not all connecting pipes must lead into continuous fluid channels. This is only the case when the fluid channels are manufactured according to the maximum expansion level.

[0030] As already described in the description of the combined tool system, another valve position can be present on the third side and the fourth side, respectively. Valves are arranged at each valve position. The valves are, for example, fluidly connected to a connecting pipe and to the main fluid channel, respectively. This achieves a particularly compact structure for the fluid module. Furthermore, the valves laterally close the main fluid channel, which also contributes to improved process safety, as sealing via valves is significantly more reliable than, for example, a ball plug through a channel.

[0031] The fluid module may include a circuit board, with a fluid plate fixed thereon, wherein a plug connector is disposed on the circuit board, the plug connector electrically contacting the valve when the valve is positioned at the valve location on the fluid plate. Thus, the circuit board serves as a carrier for both the fluid plate and the valve.

[0032] According to another embodiment, a connector for connecting a pressure sensor is provided on the fifth side of the fluid plate, and at least one first pressure sensor is arranged on the circuit board, wherein one of the connectors constituting the fluid plate abuts against the first pressure sensor. Therefore, a connection is automatically established between the connector and the first pressure sensor during the assembly of the fluid module.

[0033] Pressure sensors, especially the sensitive surfaces of pressure sensors, are sealed axially outward, particularly by means of sealing rings arranged in grooves in the fluid plate.

[0034] Specifically, the valve is positioned in the flow path between the first pressure sensor and the main fluid channel.

[0035] For example, a flow path begins at least one connecting pipe and extends to a valve position, specifically to a valve position occupied by a valve, and this flow path extends from the valve position to the main fluid passage via a valve arranged at the valve position, wherein a flow passage branches between the connecting pipe and the valve position to a first pressure sensor. This means that the main fluid passage can be fluidly separated from or connected to the connecting pipe via a valve.

[0036] Because the fluid module contains multiple interconnected valves and pressure sensors, the main fluid passage can be fluidly connected to and disconnected from the other connecting pipes depending on the valve positions. This allows for different operating modes.

[0037] The fluid plate is, for example, composed of a single piece, or more precisely, a single injection-molded part.

[0038] According to the invention, this objective is also achieved by a dialysis machine having a fluid module according to the invention, wherein the dialysis machine has a venous blood chamber and an arterial blood chamber.

[0039] The venous blood chamber is fluidly connected to the fluid plate via a connecting pipe, wherein the flow path begins at the connecting pipe and is guided to the main fluid channel via a valve located at the first valve position, and wherein a flow channel to the first pressure sensor branches between the connecting pipe and the valve position.

[0040] The arterial blood chamber is fluidly connected to another connecting pipe of the fluid plate via a pipeline. A flow path begins at the connecting pipe and is guided to a valve located at another valve position, wherein a flow channel branches off to another pressure sensor between the valve position and the connecting pipe.

[0041] A 3 / 2-way valve is connected to two other valve positions. The 3 / 2-way valve is fluidly connected to the main fluid channel via a connector, particularly the NC connector, and fluidly connected to a common connecting pipe via another connector, particularly the NO connector, and fluidly connected to individual connecting pipes via a third connector. A pneumatic pump is connected to the connecting pipe.

[0042] In this type of dialysis machine, depending on the switching position, air can be drawn from the environment into the main fluid channel or discharged from the main fluid channel into the environment in order to regulate the pressure in the venous blood chamber and / or arterial blood chamber. Attached Figure Description

[0043] Further advantages and features of the invention will become apparent from the following description and the accompanying, referenced drawings. The drawings show:

[0044] - Figure 1 This illustrates a fluid module according to the invention at a first extended level, the fluid module having a fluid plate manufactured by means of a tool system according to the invention.

[0045] - Figure 2 Showing according to Figure 1 The fluid planning diagram of the extended-level fluid module of the dialysis machine according to the present invention is shown.

[0046] - Figure 3 Show Figure 1 A top view of the fluid module in the middle.

[0047] - Figure 4 Show along Figure 3 A cross-sectional view of line AA in the diagram.

[0048] - Figure 5 Show Figure 1 The cross-section of the pressure sensor region in the fluid module.

[0049] - Figure 6 A cross-section of an alternative fluid module is shown throughout the pressure sensor region.

[0050] - Figure 7 This shows a cross-section of another alternative fluid module that runs through the pressure sensor region.

[0051] - Figure 8 Show along Figure 3 The cross section of line CC in the middle,

[0052] - Figure 9 The electrical contacts of the valve are shown.

[0053] - Figure 10 A side view of the fluid module in the valve area arranged on the side is shown.

[0054] - Figure 11 Show along Figure 10 The cross section of line DD in the middle.

[0055] - Figure 12 Show along Figure 10 The cross section of line EE in the middle,

[0056] - Figure 13 Show Figure 12 Detailed view of region F in the image.

[0057] - Figure 14A side view of the fluid module in the valve area arranged on the side is shown.

[0058] - Figure 15 Show along Figure 14 The cross section of line GG in the middle,

[0059] - Figure 16 Show along Figure 14 The alternative cross section of line GG in the middle,

[0060] - Figure 17 Showing the manufacturing process for Figures 1 to 16 The tool system of the fluid plate of the fluid module shown.

[0061] - Figure 18 Showing by means of Figure 17 Fluid plates manufactured using the tool system in the middle, and

[0062] - Figure 19 Show Figure 18 Another view of the fluid plate in the image. Detailed Implementation

[0063] Figure 1 A fluid module 10 suitable for use as an extracorporeal pressure monitoring system in a dialysis machine is shown.

[0064] However, the fluid module 10 is not limited to applications in dialysis machines. In principle, the fluid module 10 is suitable for pressure monitoring in a variety of applications.

[0065] Figure 1 The fluid module 10 shown is one of several possible expansion levels, which will become clearer in the following description.

[0066] Figure 1 The variant shown is the basic variant.

[0067] The fluid module 10 has a circuit board 12, five valves 14-1, 14-2, 14-3, 14-4, 14-5 (the valves being, in particular, solenoid valves), multiple pressure sensors 16-1, 16-2, 16-3 (e.g., three pressure sensors), and a fluid plate 18, which is manufactured using a tool system according to the invention. The following is based on... Figure 17 The tool system will be described further.

[0068] The fluid plate 18 is composed of a single piece, or more precisely, it is composed of a single injection molded part.

[0069] Pressure sensors 16-1, 16-2, and 16-3 are fixed to circuit board 12, and are specifically soldered to circuit board 12.

[0070] The fluid plate 18 is also fixed to the circuit board 12, especially screwed onto the circuit board.

[0071] Valves 14-1, 14-2, 14-3, 14-4, and 14-5 are respectively arranged at different valve positions 20 on the fluid plate. Specifically, valves 14-1, 14-2, 14-3, 14-4, and 14-5 are directly arranged at valve positions 20, meaning that there are no other components, especially no pipelines, between valves 14-1, 14-2, 14-3, 14-4, and 14-5 and their respective valve positions 20.

[0072] The fluid plate 18 is basically cuboid in shape and has six sides 22, 24, 26, 28, 30, 32.

[0073] Multiple valve positions 20 are formed at the first side 22 (see Figure 3 ),exist Figure 1 The three valve positions described are occupied by valves 14-1, 14-2, and 14-4.

[0074] Multiple connecting pipes 34-1, 34-2, and 34-4 to 34-9 are formed on a second side 24 opposite to the first side 22. Another connector 34-3 is oriented downwards, i.e., it is located on side 30.

[0075] There is another valve position 20 at the third side 26. A valve 14-3 is arranged at this valve position 20.

[0076] A valve position 20 is also present at the fourth side 28, where valves 14-5 are arranged.

[0077] A connector 36 for connecting pressure sensors 16-1, 16-2, and 16-3 is located at the fifth side 30 of the fluid plate 18 (see [link]). Figure 4 Pressure sensors 16-1, 16-2, and 16-3 are particularly close to connector 36.

[0078] Valves 14-1, 14-2, 14-3, 14-4, and 14-5 are respectively fluidly connected to one of the connecting pipes 34-1 to 34-9.

[0079] The main fluid channel 38 begins at the third side 26 of the fluid module 10, extends laterally through the fluid plate 18, and reaches the fourth side 28 (see...). Figure 4 ).

[0080] Valves 14-1, 14-2, 14-3, 14-4, and 14-5 are directly connected to the main fluid channel 38, which can also be accessed from... Figure 2 As can be seen from the fluid planning diagram shown.

[0081] The two valves 14-3 and 14-5 at the third and fourth sides 26 and 28 are used to close the main fluid passage 38.

[0082] According to the fluid planning diagram shown for dialysis machine 40 Figure 2 The structural or fluid connections of valve position 20 with pressure sensors 16-1, 16-2, 16-3 and connecting pipes 34-1 to 34-9 become clear.

[0083] In the basic variant, not all connecting pipes 34-1 to 34-9 functionally participate in the structure. Some of connecting pipes 34-1 to 34-9 can be considered dummy pipes. Figure 2 This is further illustrated by interrupt 15, which omits the unoccupied valve position 20 and the corresponding connecting pipe.

[0084] Connector 34-9 can also be optionally designed as a dummy connector.

[0085] In addition to the fluid module 10, the dialysis machine 40 also includes a pneumatic pump 42, a venous blood chamber 44, and an arterial blood chamber 46. The venous blood chamber and the arterial blood chamber are specifically configured as infusion chambers.

[0086] When the fluid module 10 is used in the dialysis machine 40, the pneumatic pump 42 is connected to the connecting pipes 34-1 and 34-2.

[0087] In terms of flow, valves 14-1 and 14-5 are arranged between connecting pipes 34-1 and 34-2 and the main fluid passage 38.

[0088] Valves 14-1 and 14-5 are 3 / 2-way valves, respectively.

[0089] The valve is particularly fluidly connected to the main fluid channel 38 via its NC connector.

[0090] The two valves 14-1 and 14-5 are fluidly connected to a common connecting pipe 34-3 via another fitting, especially via a NO fitting.

[0091] Valves 14-1 and 14-5 are fluidly connected to connecting pipes 34-1 and 34-2 via a third connector, and pneumatic pump 42 is connected to the connecting pipe.

[0092] Depending on the switching positions of valves 14-1 and 14-5, air can be drawn from the environment into the main fluid channel 38 via connecting pipe 34-3 or discharged from the main fluid channel 38 into the environment. This is used to regulate the pressure in the venous blood chamber 44 or the arterial blood chamber 46.

[0093] Blood chambers 44 and 46 are connected to connecting pipes 34-8 and 34-7 in particular via lines or hoses in the embodiments; however, for simplicity, the hoses or lines are not shown in the drawings.

[0094] The flow path extends from the connecting pipe 34-8 through valve 14-3 to the main fluid passage 38.

[0095] Between the connecting pipe 34-8, which is connected to the venous blood chamber 44, and the valve position 20, which is attached to the valve 14-3, the flow path branches to the first pressure sensor 16-1.

[0096] Therefore, depending on the switching position of valve 14-3, the connecting pipe 34-8, and thus the venous blood chamber 44 connected thereto, can be fluidly connected to or disconnected from the main fluid channel 38 via valve 14-3, which is arranged between the connecting pipe 34-4 and the main channel 38 in terms of flow.

[0097] If the venous blood chamber 44 is fluidly connected to the main fluid channel 38, the liquid level in the venous blood chamber 44 can be regulated by a pressure regulating device, in particular by pressing air into the blood chamber 44 by means of a pneumatic pump 42 or by drawing air out of the blood chamber.

[0098] Pressure sensor 16-1 detects the pressure in the associated blood chamber 44, thereby regulating the pressure in the blood chamber 44 and thus regulating the liquid level.

[0099] Pressure sensor 16-2 detects the pressure in the associated arterial blood chamber 46.

[0100] Valves 14-1, 14-2, and 14-4 are arranged at other valve positions 20 formed on the side 22.

[0101] Valve 14-2 is arranged in the flow path between connecting pipe 34-6 and main fluid passage 38.

[0102] Valve 14-4 is arranged in the flow path between connecting pipe 34-7 and main fluid passage 38.

[0103] Between the connecting pipe 34-7 and the valve position 20 where the valve 14-4 is located, the flow passage branches to another pressure sensor 16-2.

[0104] The additional pressure sensor 16-2 specifically monitors arterial pressure.

[0105] The arrangement of valves 14-1, 14-2, 14-3, 14-4, and 14-5 is as follows: Figure 1 as well as Figure 3 As can be seen, Figure 3 A top view of the fluid module 10 is shown.

[0106] Figure 4 Show along Figure 3 Line AA passes through the cross section of fluid module 10.

[0107] exist Figure 4 In the middle, it can be seen from the nozzle 48 that the valve position 20 is fluidly connected to the main fluid channel 38.

[0108] Additionally, it can be identified that: starting from connector 36 for pressure sensors 16-1, 16-2, and 16-3, channel 50 extends to the height of valve position 20. Channel 50 then leads into other channels, which begin from associated connecting pipe 34 and extend to valve position 20.

[0109] Valve 14-5 is fluidly connected to connecting pipe 34-3 via a channel 54 extending parallel to the main fluid channel 38 from the fourth side 28.

[0110] Figure 5 The diagram shows a cross-section through the fluid module 10 in the region of pressure sensor 16, particularly pressure sensors 16-2 and 16-3 connected to valves 14-2 or 14-4. The pressure sensor 16-2 is sealed within... Figure 5 As shown in the diagram. Specifically, the pressure sensor 16-2 is sealed by an axial seal in the form of an O-ring 56.

[0111] O-ring 56 is inserted into recess 58 in fluid plate 18.

[0112] Other pressure sensors 16-1 are sealed in the same way.

[0113] If other valve positions are occupied, the pressure sensors corresponding to those other valves are sealed in the same manner.

[0114] Figure 6 The possibility of replacing the sealed pressure sensors 16-1, 16-2, and 16-3 is shown. In particular, there are extensions 60 at the pressure sensors and at the fluid plate 18, which are fluidly connected to each other via silicone hoses 62.

[0115] Figure 7 Another design for the sealed pressure sensors 16-1, 16-2, and 16-3 is shown. Figure 7 The embodiment shown employs a radial seal. For this purpose, an extension 59 is present on the pressure sensor, and an O-ring 56 is fitted onto the extension.

[0116] Figure 8 Showing along Figure 3 The cross section of line CC in the middle.

[0117] The cross-section extends through valve position 20, which is unoccupied in the basic extension level. Therefore, channel 64, extending from valve position 20 in the direction toward main fluid passage 38, terminates before main fluid passage 38.

[0118] Another channel 66, which begins at the valve position, also ends without connecting to another channel. If channel 66 continues, then the channel is fluidly connected to pressure sensor 16-1.

[0119] Figure 9 Valves 14-1 to 14-5 are shown to be electrically contacted by means of a plug connector 67, which is fixed, in particular, soldered to the circuit board 12.

[0120] Figures 10 to 13 A filter 68 is shown arranged on connector 34-3. This filter is used to filter the fluid drawn in by pneumatic pump 42. Filter 68 can be, for example, a felt sheet or a screen.

[0121] like Figure 13 As shown in the detailed view, there is a recess 69 at the end face of connector 34-3, in which filter 68 is embedded.

[0122] A sealing element 71, specifically an O-ring, is arranged between the filter 68 and the circuit board 12. With the fluid module 10 installed, the sealing element 71 holds the filter 68 against the connector 34-3 to ensure that the intake fluid flows completely through the filter 68.

[0123] Connector 34-3 is located directly on circuit board 12.

[0124] The sealing element 71 is also located on the circuit board 12. Therefore, the filter 68 and the sealing element 71 are held at the connector 34-3 by the circuit board 12.

[0125] There is a recess 73 in the circuit board 12 that overlaps with the connector 34-3. Therefore, the connector 34-3 can be reached through the circuit board 12.

[0126] Figures 14 to 16 Two different expansion levels of the fluid module 10 are shown. Figure 15 The variant shown is the basic variant, in which the connecting pipe 34-9 is designed as a dummy pipe and therefore is not fluidly connected to the main fluid channel 38.

[0127] exist Figure 16 In the variant shown, the fluid connection is made to the connecting pipe 34-9.

[0128] For example, other sensors, measuring points, or compensation volumes can be connected at connection pipe 34-9.

[0129] It has become clear from the preceding description that the fluid module 10 is modular. This means that, based on the basic variant, other valves and pressure sensors can be connected.

[0130] A particular advantage of the fluid module 10 is that the outer contour of the fluid plate 18 is consistent, and the fluid channels are configured accordingly based on the desired function.

[0131] exist Figure 17 The description refers to the injection molding tool 70 used to manufacture the fluid plate 18. The injection molding tool 70 is composed of various components of the tool system 72.

[0132] Tool system 72 is configured to enable the fluid plate 18 to be manufactured in various variations in a simple and cost-effective manner, so as to achieve bonding. Figures 1 to 14 The different levels of extension described.

[0133] Specifically, the tooling system 72 has a first mold plate 74 and a second mold plate 76, which form the upper and lower portions of the injection molding tool 70 and are capable of traveling along the main demolding direction. Figure 17 In the drawing plane, the main demolding direction extends so that only the outlines of the first mold plate 74 and the second mold plate 76 are visible.

[0134] In addition, the tooling system 72 has two base sliders 78 and 80, which are arranged on opposite sides of the injection molding tool 70 and can travel in a direction transverse to the main demolding direction.

[0135] Additionally, the tooling system 72 has a kit consisting of at least two different first changeable sliders 82 and second changeable sliders 84, which can be positioned on opposite sides of the injection molding tool 70 and can travel in a direction transverse to the main demolding direction and transverse to the travel direction of the base sliders 78, 80.

[0136] Connecting pipes 34-1, 34-2, and 34-4 to 34-9 are formed in the first mold plate 74 and the second mold plate 76.

[0137] The connector 34-3 is formed in the second mold plate 76, which constitutes the lower part of the mold.

[0138] Extensions 86 and 88 for forming the main fluid channel 38 exist in the base sliders 78 and 80.

[0139] Additionally, a valve position 20 geometry is mapped onto each of the base sliders 78 and 80. The geometry at the base sliders 78 and 80 is... Figure 17It is not directly visible, but it can be indirectly derived from the preceding figures, which show a fluid plate 18 manufactured by means of an injection molding tool 70.

[0140] Additionally, additional extensions for forming additional channels may exist at the base sliders 78 and 80.

[0141] At the first replacement slider 82, there is a geometry for forming the valve position 20 and an extension for forming a flow channel guiding from the valve position 20 to the main fluid channel 38. The geometry is... Figure 17 It is not directly visible in the middle, but can be seen from Figure 18 From this, we can conclude that Figure 18 This shows one side of the fluid plate 18 that has been shaped by means of the first replacement slider 82.

[0142] A passageway 94 is visible at each valve position 20. The first replacement slider 82 has an extension at the corresponding location to form the corresponding fluid passage.

[0143] Depending on the required expansion level of the fluid module 10, not all valve positions 20 are fluidly connected.

[0144] To enable different variations, the different first replacement sliders 82 of the tooling system differ in the number and / or length of the extensions used to form the flow channel. The appropriate first replacement slider 82 is selected based on the desired level of extension.

[0145] Similar provisions apply to the second replacement slider 84. Specifically, the second replacement slider 84 contains an extension that forms a flow channel originating from the connecting pipe 34.

[0146] Different second replacement sliders 84 also differ in the number and / or length of their extensions.

[0147] from Figure 19 The position of the extension of the second replacement slider 84 is indirectly obtained, and it corresponds to the orientation of the connecting pipe 34.

[0148] exist Figure 18 Also visible is a connector 36 for connecting sensors, particularly pressure sensor 16.

[0149] The corresponding geometry used to form the connector 36 is formed in one of the two mold plates 74.

[0150] An extension exists in the mold plate 74, in which a connector 36 for connecting the sensor is formed, extending to the height of the valve position 20 when the tool is closed. This creates a channel in the fluid plate 18 leading to the pressure sensor 16.

[0151] Additionally, a threaded dome 98 is present on the same side of the fluid plate 18 that also forms the connector 36, the threaded dome being used to screw the fluid plate 18 onto the circuit board 12.

[0152] The corresponding geometry for forming the spiral dome 98 is formed in the mold plate 74, which also contains the geometry for forming the joint 36.

[0153] The spiral dome 98 is spatially close to the connector 36. Thus, when the fluid plate 18 is fixed to the circuit board 12, sufficient pressure is applied to the pressure sensor 16 to achieve a reliable seal.

Claims

1. A tool system (72) for manufacturing injection-molded fluid plates (18). The fluid plate (18) has six sides (22, 24, 26, 28, 30, 32) and is particularly cuboid in shape, wherein a plurality of valve positions (20) for connecting valves (14) are present on a first side (22) and a plurality of connecting pipes (34) for connecting fluid hoses are formed on a second side (24) opposite to the first side (22), and wherein a main fluid channel (38) extends laterally through the fluid plate (18) from a third side (26) to a fourth side (28), and at least some of the valve positions (20) and at least some of the connecting pipes (34) are fluidly connected to the main fluid channel (38). The tool system (72) includes: a first mold plate (74) and a second mold plate (76), the first mold plate and the second mold plate forming an upper part and a lower part of an injection molding tool (70) and capable of traveling along a main demolding direction; two base sliders (78, 80), the base sliders being arranged on opposite sides of the injection molding tool (70) and the base sliders being capable of traveling in a direction transverse to the main demolding direction; and a kit consisting of at least two different first and second replacement sliders (82, 84), the first and second replacement sliders being positioned on opposite sides of the injection molding tool (70) and capable of traveling in a direction transverse to the main demolding direction and transverse to the traveling direction of the base sliders (78, 80); The connecting pipe (34) is formed in the first mold plate (74) and the second mold plate (76), and the base sliders (78, 80) have extensions (86, 88) for forming the main fluid channel (38), the first replacement slider (82) has a geometry for forming the valve position (20) and an extension for forming a flow channel from the valve position (20) to the main fluid channel (38), and the second replacement slider (84) has an extension for forming a flow channel originating from the connecting pipe (34). The different first replacement sliders (82) and the different second replacement sliders (84) differ in the number and / or length of the extensions used to form the flow channel.

2. The tool system (72) according to claim 1, characterized in that, The geometry of at least one additional valve position (20) is mapped in each of the two base sliders (78, 80).

3. The tool system (72) according to any one of the preceding claims, characterized in that, The connector (36) for connecting the sensor is formed in one of the two mold plates (74, 76).

4. The tool system (72) according to claim 3, characterized in that, An extension is present in the mold plate (74, 76) in which the connector (36) for connecting the sensor is formed, the extension extending to the height of the valve position (20) when the tool is closed.

5. A fluid module (10) for use as an extracorporeal pressure monitoring system in a dialysis machine (40), the fluid module having a fluid plate (18), the fluid plate being manufactured particularly by means of a tool system (72) according to any one of the preceding claims. The fluid plate (18) has six sides (22, 24, 26, 28, 30) and is particularly cuboid in shape, wherein a plurality of valve positions (20) for connecting valves (14) are present on a first side (22) and a plurality of connecting fittings (34) for connecting fluid hoses are formed on a second side (24) opposite to the first side (22), and wherein a main fluid channel (38) extends laterally through the fluid plate (18) from a third side of the fluid plate (18) to a fourth side. At least two valve positions (20) of the fluid plate (18) are occupied by valves (14), wherein the at least two valve positions (20) occupied by valves (14) are fluidly connected to the main fluid passage (38) of the fluid plate (18), and Each of the valve positions (20) is fluidly connected to at least one connecting pipe (34).

6. The fluid module (10) according to claim 5, characterized in that, Another valve position (20) is present at the third side (26) and at the fourth side (28), wherein a valve (14) is arranged at the valve position (20), and the valves (14-3, 14-5) are fluidly connected to the connecting pipe (34) and the main fluid channel (38).

7. The fluid module (10) according to claim 5 or 6, characterized in that, The fluid module (10) includes a circuit board (12) and a fluid plate (18) fixed thereon. A plug connector (67) is disposed thereon and makes electrical contact with the valve (14) when the valve (14) is disposed at the valve position (20) on the fluid plate (18).

8. The fluid module (10) according to any one of claims 5 to 7, characterized in that, A connector (36) for connecting a pressure sensor (16) is provided on the fifth side (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 connectors (36) constituting the fluid plate (18) is attached to the first pressure sensor (16-1).

9. The fluid module (10) according to claim 8, characterized in that, The valve (14-3) is arranged in the flow path between the first pressure sensor (16-1) and the main fluid channel (38).

10. The fluid module (10) according to claim 8 or 9, characterized in that, The flow path begins at at least one connecting pipe (34-8) and extends to the valve position (20) and extends to the main fluid passage (38) via a valve (14-3) arranged at the valve position (20), wherein a flow passage to the first pressure sensor (16-1) branches between the connecting pipe (34-8) and the valve position (20).

11. A dialysis machine (40) having 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). The venous blood chamber (44) is fluidly connected to the fluid plate (18) via a connecting pipe (34-8), wherein the flow path begins at the connecting pipe (34-8) and is guided to the main fluid channel (38) via a valve (14-3) located at the first valve position (20), wherein a flow channel branches between the connecting pipe (34-8) and the valve position (20) to the first pressure sensor (16-1), and The arterial blood chamber (46) is fluidly connected to another connecting pipe (34-7) of the fluid plate (18) via a conduit. A flow path begins at the connecting pipe and leads to a valve (14-4) located at another valve position (20), wherein a flow channel branches between the connecting pipe (34-7) and the valve (14-4) to another pressure sensor (16-2). Furthermore, a 3 / 2-way valve (14-1, 14-5) is connected to two other valve positions (20), the other 3 / 2-way valves are fluidly connected to the main fluid passage (38) via a connector, fluidly connected to a common connecting pipe (34-3) via another connector, and fluidly connected to individual connecting pipes (34-1, 34-2) via a third connector, and a pneumatic pump (42) is connected to the third connecting pipe.

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