Spiral flow guide filter element, manufacturing process, glue filling mold and molded parts

Abstract

The present application discloses a spiral flow guide filter element, a manufacturing process, a glue pouring mold, and a molded part. The glue pouring mold includes an inner core, an outer shell that is sleeved on the inner core, and a first positioning end cap and a second positioning end cap that are arranged at both ends of the inner core and fix the outer shell. A glue pouring space is provided between the surface of the inner core and the inner surface of the outer shell. The cross-sectional shape of the glue pouring space conforms to the cross-sectional shape of the spiral flow guide filter element. The first positioning end cap, the second positioning end cap, or the outer shell has at least one glue injection port, and the glue injection port is connected to the glue pouring space. The present application designs a corresponding glue pouring mold based on the surface structure of the spiral flow guide filter element to be formed, and performs glue pouring on the glue pouring mold to form a spiral flow guide filter element having at least one spiral rib or spiral flow guide groove. The manufacturing process of the present application is simple and can effectively reduce the manufacturing cost of the spiral flow guide filter element.

Description

Technical Field

[0001] The present invention relates to the technical field of filter element manufacturing for membrane oxygenators, and in particular to a spiral flow guide filter element for membrane oxygenators, a manufacturing process, a glue-pouring mold and a molded part. Background Art

[0002] An oxygenator (also known as an artificial lung) can replace the function of the human lungs for short or long periods during surgery. It is a surgical device that performs extracorporeal blood gas exchange. By regulating blood temperature and exchanging gases, the oxygenator converts venous blood drawn from the body into arterial blood, which is then pumped back into the body.

[0003] The key to achieving efficient temperature regulation and gas exchange in an oxygenator is ensuring even distribution of blood and sufficient contact with the corresponding hollow fibers. Chinese patent application number CN 201710817792.5 discloses the use of spiral flow guides to achieve uniform flow distribution. However, the molding process for this spiral flow guide structure is relatively difficult. If conventional horizontal or vertical molds are used, the demolding process becomes very complex, resulting in a very expensive finished mold. Summary of the Invention

[0004] The main purpose of the present application is to provide a spiral flow guide filter element, a manufacturing process, a glue pouring mold and a molded part for a membrane oxygenator, so as to solve the problems existing in the prior art such as the mold release structure requiring special restrictions, the high complexity of the mold and the high cost of the mold.

[0005] In order to solve the above problems, the present application provides a glue pouring mold for a spiral flow guide filter element, which includes an inner core, an outer shell sleeved on the inner core, and a first positioning end cover and a second positioning end cover arranged at both ends of the inner core and fixed to the outer shell. There is a glue pouring space between the surface of the inner core and the inner surface of the outer shell. The cross-sectional shape of the glue pouring space conforms to the cross-sectional shape of the spiral flow guide filter element. The first positioning end cover has at least one glue injection port, and the glue injection port is connected to the glue pouring space.

[0006] According to one embodiment of the present application, the surface of the inner core has at least one spiral guide groove, and the at least one spiral guide groove is located inside the outer shell.

[0007] According to one embodiment of the present application, the surface of the inner core has a plurality of hole positioning recesses, and the plurality of hole positioning recesses are spaced apart between the plurality of spiral guide grooves.

[0008] According to one embodiment of the present application, the surface of the inner core has a plurality of hole protrusions, and the plurality of hole protrusions are spaced apart between the plurality of spiral guide grooves and abut against the inner surface of the outer shell.

[0009] According to one embodiment of the present application, the inner surface of the shell has at least one spiral guide ridge, and the at least one spiral guide ridge is located in the glue pouring space.

[0010] According to one embodiment of the present application, the surface of the inner core or the inner surface of the outer shell has at least one through-groove protrusion, and the at least one through-groove protrusion is located on one side of at least one spiral guide protrusion.

[0011] According to one embodiment of the present application, the first positioning end cover has at least one exhaust hole, and the at least one exhaust hole is connected to the glue pouring space.

[0012] According to one embodiment of the present application, the inner core has a cooling channel.

[0013] According to one embodiment of the present application, the inner core has a plurality of micropores, and the plurality of micropores are connected to the cooling channel.

[0014] The present application provides another molded part made using the above-mentioned glue-filling mold, which includes a core body and at least one spiral rib arranged on the inner wall surface of the core body, and the at least one spiral rib corresponds to at least one spiral guide groove.

[0015] The present application provides another molded part made using the above-mentioned glue pouring mold, which includes a core body, at least one spiral rib arranged on the inner wall surface of the core body, and multiple hole positioning protrusions arranged on the inner wall surface of the core body and located between the at least one spiral rib, at least one spiral rib corresponds to at least one spiral guide groove, and the multiple hole positioning protrusions correspond to multiple hole positioning concave points.

[0016] The present application provides a spiral flow-guiding filter element made using the above-mentioned glue-filling mold, which includes a core body, at least one spiral rib arranged on the inner wall surface of the core body, and multiple flow-guiding through-holes arranged on the core body and located between the at least one spiral rib, at least one spiral rib corresponds to at least one spiral flow-guiding groove, and multiple flow-guiding through-holes correspond to multiple hole protrusions.

[0017] The present application provides a molded part made using the above-mentioned glue-filling mold, which includes a core body and at least one spiral guide groove arranged on the outer wall surface of the core body, and the at least one spiral guide groove corresponds to at least one spiral guide ridge.

[0018] The present application provides a spiral guide filter element made using the above-mentioned glue casting mold, which includes a core body, at least one spiral guide groove arranged on the outer wall surface of the core body, and at least one through groove arranged on the core body and located on one side of the at least one spiral guide groove, at least one spiral guide groove corresponds to at least one spiral guide ridge, and at least one through groove corresponds to at least one through groove ridge.

[0019] The present application provides a manufacturing process for a spiral flow guide filter element, which includes: providing the above-mentioned glue pouring mold; pouring a plastic solution into the glue pouring space of the glue pouring mold, filling the glue pouring space with the plastic solution; heating the glue pouring mold to solidify the plastic solution in the glue pouring space into a molded part; cooling the glue pouring mold; removing the molded part from the glue pouring mold; and drilling the molded part to form a spiral flow guide filter element.

[0020] The present application provides a manufacturing process for a spiral flow guide filter element, which includes: providing the above-mentioned glue pouring mold; pouring a plastic solution into the glue pouring space of the glue pouring mold, so that the plastic solution fills the glue pouring space; heating the glue pouring mold to solidify the plastic solution in the glue pouring space into a molded part; cooling the glue pouring mold; removing the molded part from the glue pouring mold, and forming a spiral flow guide filter element.

[0021] According to one embodiment of the present application, the heating temperature is between 180 degrees Celsius and 260 degrees Celsius.

[0022] According to one embodiment of the present application, the heating time is between 20 minutes and 40 minutes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a cross-sectional view of the spiral flow guide filter element of the first embodiment of the present application.

[0025] Figure 2 This is a flowchart for manufacturing the spiral flow guide filter element of the first embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the glue-filling mold of the first embodiment of the present application.

[0027] Figure 4 This is a schematic diagram of the molded part of the first embodiment of the present application

[0028] Figure 5 This is a schematic diagram of the glue-filling mold of the second embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of a molded part according to the second embodiment of the present application.

[0030] Figure 7 This is a schematic diagram of the glue-filling mold of the third embodiment of the present application.

[0031] Figure 8 It is a schematic diagram of the spiral flow guide filter element of the fourth embodiment of the present application.

[0032] Figure 9 This is a schematic diagram of the glue-filling mold of the fourth embodiment of the present application.

[0033] Figure 10 This is a schematic diagram of the glue-filling mold of the fifth embodiment of the present application.

[0034] Figure 11 This is a schematic diagram of the glue-filling mold of the sixth embodiment of the present application. DETAILED DESCRIPTION

[0035] The following diagrams illustrate various embodiments of the present application. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present application. In other words, in some embodiments of the present application, these practical details are not essential. Furthermore, to simplify the drawings, some conventional structures and components are depicted in a simplified schematic manner.

[0036] The terms "first", "second", etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit this application. They are merely used to distinguish components or operations described with the same technical terms.

[0037] See also Figure 1 , which is a cross-sectional view of the spiral flow guide filter element 1 of the first embodiment of the present application; as shown in the figure, this embodiment provides a spiral flow guide filter element 1, which is used for a membrane oxygenator. The spiral flow guide filter element 1 includes a core body 10, a plurality of spiral ribs 11 arranged on the inner wall surface of the core body 10, and a plurality of flow guide holes 12 passing through the core body 10 and located between the plurality of spiral ribs 11. The plurality of spiral ribs 11 form a plurality of spiral flow guide grooves 13 on the inner wall surface of the core body 10, and each spiral flow guide groove 13 is located between two adjacent spiral ribs 11. Please refer to Figure 2 、 Figure 3 and Figure 4, which is a manufacturing flow chart of the spiral guide filter element 1 of the first embodiment of the present application, a schematic diagram of the glue potting mold 2 and a schematic diagram of the molded part 3; as shown in the figure, this embodiment provides a manufacturing process of the spiral guide filter element 1, which first performs step S11 to provide a glue potting mold 2. The glue potting mold 2 of this embodiment includes an inner core 21, an outer shell 22, a first positioning end cover 23 and a second positioning end cover 24. The inner core 21 has a first end 21a and a second end 21b opposite to the first end 21a. The surface between the first end 21a and the second end 21b of the inner core 21 has a plurality of spiral guide grooves 211 arranged at intervals. The outer shell 22 is sleeved over the inner core 21 and positioned between the first end 21a and the second end 21b of the inner core 21. It also covers the multiple spiral flow guide grooves 211. A glue injection space is formed between the inner surface of the outer shell 22, the surface of the inner core 21, and the multiple spiral flow guide grooves 211. In other words, the cross-sectional shape of the glue injection space is determined by the surface structure of the inner core 21 and the inner surface structure of the outer shell 22, which must also conform to the cross-sectional shape of the spiral flow guide filter element 1. A first positioning end cap 23 is disposed at the first end 21a of the inner core 21, and a second positioning end cap 24 is disposed at the second end 21b of the inner core 21. The first positioning end cap 23 has at least one glue injection port 231, which communicates with the glue injection space. The at least one glue injection port 231 can be located on either the second positioning end cap 24 or the outer shell 22, as long as it communicates with the glue injection space.

[0038] Next, step S12 is performed to inject plastic solution into the glue filling space through at least one glue injection port 231 until the glue filling space is filled with plastic solution, at which point injection of the plastic solution into the glue filling space is stopped. Then, step S13 is performed to heat the glue filling mold 2, which has been filled with plastic solution, to solidify the plastic solution into a molded part 3. In this embodiment, the glue filling mold 2 is placed in a heating furnace for heating. This molded part 3 includes a core body 10 and a plurality of spiral ribs 11 formed on the inner wall surface of the core body 10 and corresponding to the plurality of spiral guide grooves 211. The heating temperature is controlled between 180°C and 260°C, and the heating time is between 20 minutes and 40 minutes.

[0039] Next, step S14 is performed to remove the potting mold 2 from the heating furnace and cool it, where the cooling process is air cooling, wind cooling, or water cooling. Next, step S15 is performed to remove the molded part 3 from the potting mold 2. This involves first removing the first and second positioning end caps 23 and 24, extracting the inner core 21 from the outer shell 22, and removing the molded part 3 from the inner core 21. Next, step S16 is performed to drill the molded part 3 to form a plurality of diversion holes 12 in the core body 10 of the molded part 3. The plurality of diversion holes 12 are located in the spiral diversion grooves 13 between two adjacent spiral ribs 11, thereby obtaining the spiral diversion filter element 1 of this embodiment.

[0040] Refer back Figure 3 In this embodiment, the second end 21b of the inner core 21 has a stop block 210. When the outer shell 22 is sleeved on the inner core 21, the outer shell 22 is inserted from the first end 21a of the inner core 21 and moves toward the second end 21b of the inner core 21. One end of the outer shell 22 abuts against the stop block 210 to position the outer shell 22 on the inner core 21, which facilitates the subsequent assembly of the first positioning end cover 23 and the second positioning end cover 24.

[0041] See also Figure 5 and Figure 6 , which is a schematic diagram of a potting mold 2 and a molded part 3 according to a second embodiment of the present application. As shown in the figure, the potting mold 2 of this embodiment differs from the potting mold of the above embodiment in that the surface of the inner core 21 of this embodiment has multiple hole positioning recesses 212, and the multiple hole positioning recesses 21 are spaced apart between multiple spiral guide grooves 211. When the potting mold 2 of this embodiment is used to manufacture a spiral guide filter element using the above-mentioned manufacturing process, the molded part 3 removed from the potting mold 2 has multiple hole positioning protrusions 31 corresponding to the multiple hole positioning recesses 212. The multiple hole positioning protrusions 31 form the inner wall surface of the core body 10 and are located between the multiple spiral ribs 11. The positions of the multiple hole positioning protrusions 31 correspond to the positions of the multiple guide holes of the spiral guide filter element to be manufactured. In other words, the formation of the multiple hole positioning protrusions 31 is mainly based on marking the positions of the multiple guide holes on the core body 10. Subsequently, the plurality of hole positioning protrusions 31 are drilled to form a plurality of flow-guiding through-holes of the spiral flow-guiding filter element, thereby ensuring that the plurality of flow-guiding through-holes are formed at the preset positions.

[0042] See also Figure 7 , which is a schematic diagram of the glue casting mold 2 of the third embodiment of the present application; as shown in the figure, the glue casting mold 2 of this embodiment is different from the glue casting mold of the above embodiment in that the surface of the inner core 21 of this embodiment has a plurality of hole protrusions 213, and the plurality of hole protrusions 213 are spaced apart and distributed between the plurality of spiral guide grooves 211. When the outer shell 22 is sleeved on the inner core 21, the plurality of hole protrusions 213 abut against the inner surface of the outer shell 22. When the glue casting mold 2 of this embodiment is applied to the manufacturing process of the first embodiment to manufacture a spiral guide filter element, the molded part taken out from the glue casting mold 2 has a plurality of guide perforations corresponding to the plurality of hole protrusions 213. In other words, the molded part taken out from the glue casting mold 2 is the spiral guide filter element of the first embodiment, and step S16 of the manufacturing process of the first embodiment is omitted.

[0043] See also Figure 8, which is a schematic diagram of a spiral flow guide filter element 1 according to the fourth embodiment of the present application; as shown in the figure, this embodiment provides a spiral flow guide filter element 1, which includes a core body 10, a plurality of spiral flow guide grooves 13 provided on the outer wall surface of the core body 10, and a plurality of through grooves 15 penetrating the core body 10 and located on one side of the plurality of spiral flow guide grooves 13. Please refer to Figure 9 , which is a schematic diagram of a fourth embodiment of a potting mold 2 of the present application. As shown in the figure, this embodiment differs from the first embodiment in that the inner core 21 of this embodiment does not have multiple spiral guide grooves. Instead, the inner surface of the outer shell 22, opposite the inner core 21, is provided with multiple spiral guide ridges 221. When the potting mold 2 of this embodiment is filled with a plastic solution, the mold 2 is heated, solidified, and cooled, and then a molded part is removed from the mold. The molded part includes a core body 10 and multiple spiral guide grooves 13 disposed on the outer wall of the core body 10. Finally, the core body 10 is drilled to form multiple through-grooves 15 on one side of the multiple spiral guide grooves 13. Alternatively, multiple through-grooves 221 can be provided on the inner core 21 or outer shell 22 of the potting mold 2. In this way, the multiple through-grooves 15 and the multiple spiral guide grooves 13 can be formed simultaneously, eliminating the need for subsequent drilling.

[0044] As can be seen from the above embodiments, a corresponding structure can be made on the surface of the inner core 21 or the inner surface of the outer shell 22 of the glue potting membrane 2 based on the structure of the spiral flow guide filter element 1. The cross-sectional shape of the glue potting space formed by the inner core surface and the inner surface of the outer shell 22 matches the cross-sectional shape of the spiral flow guide filter element 1, thereby forming a spiral flow guide filter element 1 that meets the requirements. The above embodiments are merely examples of implementations of this application. Of course, the number of spiral ribs 11 of the spiral flow guide filter element 1 of the first embodiment can be one, and the number of spiral guide grooves 13 of the fourth embodiment can also be one, which will not be repeated here.

[0045] See also Figure 10, which is a schematic diagram of a fifth embodiment of a potting mold 2 of the present application. As shown in the figure, this embodiment differs from the previous embodiments in that the inner core 21 of this embodiment has a cooling channel 214 extending therethrough. When the mold 2 is cooled, a cooling fluid is injected into the cooling channel 214 to improve cooling efficiency. The cooling fluid can be gas or liquid. The first positioning end cap 23 of the mold 2 of this embodiment has at least one vent 232. The at least one vent 232 communicates with the potting space. When plastic solution is introduced into the potting space, gas within the potting space can be discharged through the at least one vent 232. Furthermore, when the potting space is filled with plastic solution, the plastic solution fills the at least one vent 232. When the user observes that the plastic solution has filled the at least one vent 232, they can determine that the potting space is full of plastic solution and stop filling the space with plastic solution. The at least one exhaust hole 232 can also be selectively provided on the second positioning end cover 24 or the housing 22 , as long as it can communicate with the glue filling space.

[0046] See also Figure 11 , which is a schematic diagram of a sixth embodiment of the present application's potting mold 2. As shown in the figure, the potting mold 2 of this embodiment differs from the potting molds of the aforementioned embodiments in that the surface of the inner core 21 of this embodiment may further include a plurality of micropores 215. These micropores 215 are connected to the cooling channels 214. The micropores 215 are extremely small to prevent them from forming on the molded part. When the molded part is to be separated from the inner core 21, fluid is introduced into the cooling channels 214 and flows out of the micropores 215. The fluid pushes the molded part formed on the inner core 21, allowing the molded part to separate from the surface of the inner core 21, thereby allowing the molded part to be smoothly separated from the inner core 21.

[0047] To sum up, according to the technical solution of the present application, a corresponding glue pouring mold is designed according to the surface structure of the spiral guide filter element to be formed, and the glue pouring mold is subjected to glue pouring treatment to form a spiral guide filter element having at least one spiral rib or spiral guide groove. The manufacturing process of the present application is simple and can effectively reduce the manufacturing cost of the spiral guide filter element.

[0048] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A glue casting mold for a spiral flow guide filter element, characterized in that: The invention comprises an inner core, an outer shell sleeved on the inner core, and a first positioning end cap and a second positioning end cap provided at both ends of the inner core and fixing the outer shell. The inner core has a first end and a second end opposite to the first end. The second end of the inner core has a stop block. A glue pouring space is defined between the surface of the inner core and the inner surface of the outer shell. The cross-sectional shape of the glue pouring space conforms to the cross-sectional shape of the spiral flow guide filter element. The first positioning end cap, the second positioning end cap or the outer shell has at least one glue injection port, and the glue injection port is connected to the glue pouring space. The inner core has a penetrating cooling channel and a plurality of micropores, and the plurality of micropores are connected to the cooling channel; The molded part made by the glue casting mold of the spiral guide filter element includes a core body, the inner wall surface of the core body is provided with multiple spiral ribs, and the multiple spiral ribs form multiple spiral guide grooves on the inner wall surface of the core body, and each spiral guide groove is located between two adjacent spiral ribs.

2. The glue pouring mold of the spiral flow guide filter element according to claim 1, characterized in that: The outer surface of the inner core has at least one spiral guide groove, and the at least one spiral guide groove is located in the outer shell.

3. The glue pouring mold of the spiral flow guide filter element according to claim 2, characterized in that: The surface of the inner core is provided with a plurality of hole positioning recesses, and the plurality of hole positioning recesses are arranged at intervals between the plurality of spiral guide grooves.

4. The glue pouring mold of the spiral flow guide filter element according to claim 2, characterized in that: The surface of the inner core is provided with a plurality of hole protrusions, and the plurality of hole protrusions are arranged at intervals between the plurality of spiral guide grooves and abut against the inner surface of the outer shell.

5. The glue pouring mold of the spiral flow guide filter element according to claim 1, characterized in that: The inner surface of the shell is provided with at least one spiral guide ridge, and the at least one spiral guide ridge is located in the glue pouring space.

6. The glue pouring mold of the spiral flow guide filter element according to claim 5, characterized in that: The outer surface of the inner core or the inner surface of the outer shell has at least one through-groove protrusion, and the at least one through-groove protrusion is located on one side of the at least one spiral guide protrusion.

7. A spiral flow-guiding filter element manufactured using the glue-potting mold according to claim 4, comprising a core body, at least one spiral rib arranged on the inner wall surface of the core body, and a plurality of flow-guiding through-holes arranged in the core body and located between the plurality of spiral ribs, wherein the at least one spiral rib corresponds to the at least one spiral flow-guiding groove, and the plurality of flow-guiding through-holes correspond to the plurality of hole protrusions.

8. A process for manufacturing a spiral flow guide filter element, characterized in that: include: Providing a glue-filling mold according to any one of claims 1 to 3 and 5; Pouring a plastic solution into the glue pouring space of the glue pouring mold, until the plastic solution fills the glue pouring space; Heating the glue-filling mold to solidify the plastic solution in the glue-filling space into a molded part; Cooling the glue-filling mold; Taking out the molded part from the glue-filling mold; as well as The molded part is drilled to form the spiral flow guide filter element.

9. A manufacturing process for a spiral flow guide filter element, characterized in that: include: Providing a glue-filling mold according to any one of claims 1, 4, and 6; Pouring a plastic solution into the glue pouring space of the glue pouring mold, until the plastic solution fills the glue pouring space; Heating the glue-filling mold to solidify the plastic solution in the glue-filling space into a molded part; Cooling the glue-filling mold; as well as The molded part is taken out from the glue-filling mold to form the spiral flow guide filter element.

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