Cell screen forming mold and forming method thereof

Abstract

The invention discloses a medical instrument, and aims to provide a cell screen forming mold and a forming method thereof, which are simple to operate, high in processing efficiency, good in structural strength of a finished product and capable of automatically forming and processing a cell screen. Through the forming shell and the forming assembly, plastic in a molten state is injected into the cavity and formed by arranging the injection molding channel, the overall automation degree is high, manual intervention is not needed, the overall forming difficulty is reduced, and machining of the multiple cell screens can be completed at a time; the whole machining efficiency is high, a pressure maintaining link is arranged after injection molding is completed, the quality of finished products is optimized, and the method is suitable for the technical field of cell screen manufacturing.

Description

Technical Field

[0001] This invention relates to a medical device, and more specifically, to a cell sieve forming mold and its forming method. Background Technology

[0002] Cell sieves are physical filters that separate cells of different diameters based on their pore size. They are mainly used for experimental procedures such as cell culture, tissue cell isolation, and cell sorting.

[0003] Currently, the production method of cell sieves on the market usually involves assembling multiple components. The main method is to assemble a base for mounting the cell sieve, and then seal the sieve onto the base to complete the cell sieve manufacturing. However, the above method is complicated, and the sieve needs to be kept taut during the sealing process, which makes the overall processing difficult. After the sieve is installed, the overall structural strength is poor, and it is easy for it to detach and contaminate cells during use, affecting the accuracy of the experiment. Furthermore, the manufacturing of cell sieves requires assembling each component sequentially, resulting in low overall processing efficiency. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a cell sieve forming mold and its forming method that are simple to operate, have high processing efficiency, produce high structural strength of finished products, and can automatically perform cell sieve forming processing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cell sieve forming mold, comprising a forming shell, the forming shell comprising a forming base and a cover disposed above the forming base, the forming base having a plurality of forming grooves, each of the forming grooves being configured for mounting a forming component, the forming component comprising a support base, a forming block disposed outside the support base and a sealing cover disposed on the top of the forming block, and a channel for injection molding being provided between the forming component and the forming base.

[0006] The present invention is further configured such that: the molding block is provided with a groove, and the groove cooperates with the inner wall of the molding groove to form a cavity for injection molding.

[0007] The present invention is further configured such that: the cover body is provided with a plurality of through holes, and after the cover body is installed on the molding base, the position of the through holes matches the position of the molding groove.

[0008] Preferably, the through hole is further provided with an abutting step, the top of the sealing cover is provided with a protrusion that matches the abutting step, and after the sealing cover is installed in the cover body, the bottom of the sealing cover and the top of the support base form a gap for placing the screen.

[0009] Preferably, the cover body is further provided with an injection hole in the middle, the injection hole is connected to the channel, and an injection groove is provided between the channel and each of the molding grooves, through which the raw material in the channel enters the molding groove.

[0010] Preferably, the top of the cover is further provided with a sealing element, which is configured to seal each through hole of the cover and at least leave an inlet for injection molding.

[0011] This application also discloses a method for forming a cell sieve forming mold, including the following steps: S1, selecting the corresponding cell sieve forming mold based on the cell sieve to be formed;

[0012] S2. Install the molding block and support base inside the molding base, and place the screen on top of the support base. After the screen is placed, install the cover on the molding base, and place the sealing cover in each through hole of the cover. The sealing cover and the support base press the screen together.

[0013] S3. After the sealing cover is installed, install a sealing element on the top of the cover to seal the gap between the sealing cover and the cover.

[0014] S4. Connect the injection molding machine to the inlet of the seal and turn on the injection molding machine;

[0015] S5. The injection molding machine injects molten raw material into the channel. The raw material inside the channel is injected into the molding tank through the injection tank between the molding tank and the channel and fills the cavity between the molding block and the molding tank.

[0016] S6. After the raw material filling is completed, stop the injection of raw material and hold the mold under pressure for a time of T.

[0017] S7. After time period T, remove the seal and cover, and take out the completed cell sieve assembly;

[0018] S8. Process the cell sieve assembly, cut off excess material at the channel, and complete the forming of the cell sieve.

[0019] Preferably, step S6 further includes raw material filling detection, including the following steps: S61, setting the pressure threshold of the outlet to Pm, and detecting the pressure of the injection molding machine outlet during the injection of raw material, with the detection value being P;

[0020] S62. When injecting raw material, if P < Pm, it is determined that the current raw material has not filled the cavity in the molding die, and the injection molding machine continues to discharge material from the outlet. Conversely, if P ≥ Pm, it is determined that the current raw material has filled the cavity in the molding die, and the process jumps to S63 to perform pressure holding state detection.

[0021] S63. The injection molding machine stops discharging material and performs pressure holding for a time of T1. During the pressure holding process, the pressure at the injection molding machine outlet is continuously monitored, and the monitored value is P1.

[0022] S64. If P1 decreases during the T1 time period, it is determined that there is a leak in the molding die or that a cavity is not completely filled. After P1 stabilizes, discharge the material again and make P1 = 1.5Pm.

[0023] S65. Check P1 again. If P1 drops, it is determined that there is a leak in the current molding mold. The injection molding machine stops and the current mold is checked for leaks. Conversely, if P1 remains unchanged, it is determined that the cavity in the current mold is filled.

[0024] By adopting the above technical solution, the following beneficial effects are achieved: 1. This application enables the cell sieve to be formed at high speed and efficiency through injection molding in the molding mold. Specifically, this application uses a molding shell and molding components, and injects molten plastic into the cavity through an injection channel for molding. The overall automation level is high, requiring no manual intervention and reducing the overall molding difficulty. At the same time, this application has multiple cavities, which can complete the processing of multiple cell sieves at one time, resulting in high overall processing efficiency. After processing, the sieve part has high bonding strength, high product qualification rate, and the processed cell sieve is not easy to fall off. In addition, during the processing, a pressure holding stage is set after injection molding, which optimizes the quality of the finished product and realizes the fully automated processing from mold assembly to finished product demolding. The overall processing steps are simple and highly automated.

[0025] 2. Furthermore, the mold is formed by a slot and a forming groove. The slot and the inner wall of the forming groove cooperate to form a cavity. The cavity is automatically formed after the forming block is installed, simplifying the assembly process. During assembly, gaps are formed for installing the cell screen, ensuring accurate positioning of the screen during the pressing process and preventing screen displacement or loosening. This improves the consistency and structural integrity of the finished product. At the same time, during the assembly of the forming mold, each component of the forming mold is provided with positioning holes, eliminating the need for additional positioning during installation, reducing operator error, and preventing screen displacement. The shape of the cavity can be changed by altering the shape of the mold and forming block, making it suitable for the production of cell screens of different specifications, thus improving overall adaptability and practicality.

[0026] 3. Simultaneously, during the molding process of the cell sieve, channels are provided to connect various injection tanks and inject the raw material from the injection holes into the molding tank. The molten raw material can be quickly and evenly injected into the chambers of multiple molding tanks, realizing the one-time molding of multiple cell sieves, which greatly shortens the production cycle. Furthermore, the sealing of the molding mold is ensured during the injection molding process, so that the molten raw material can fully fill the space inside the molding tank, ensuring the integrity of the finished product and a high qualification rate.

[0027] 4. Furthermore, after the raw material injection is completed, a pressure-holding step is set up to detect the pressure value inside the molding die within a predetermined time. Specifically, if the raw material is completely filled, leaving no gaps in the cavity, the pressure value will change little after the injection stops. Conversely, if the raw material is not completely filled or the molding die leaks, the pressure value inside the die will drop. By detecting the pressure value, it can be ensured that the raw material completely fills the inside of the die, ensuring that the shape of the solidified raw material meets the requirements, and that the edges of the screen are completely sealed, avoiding the risk of cell contamination due to tiny gaps, and improving the accuracy of subsequent experimental processes. Attached Figure Description

[0028] Figure 1 This is an exploded view of an embodiment of a cell sieve forming mold and its forming method according to the present invention;

[0029] Figure 2 This is a cross-sectional view of an embodiment of a cell sieve forming mold and its forming method according to the present invention;

[0030] Figure 3 This is a cross-sectional view from another direction of an embodiment of a cell sieve forming mold and its forming method according to the present invention;

[0031] Figure 4 This is a flowchart illustrating the processing method of an embodiment of a cell sieve forming mold and its forming method according to the present invention.

[0032] Figure 5 This is a flowchart of the pressure holding method in an embodiment of a cell sieve forming mold and its forming method according to the present invention;

[0033] The reference numerals in the figure are as follows: 1. Molded shell; 2. Molded base; 3. Cover; 31. Through hole; 32. Contact step; 4. Molded groove; 5. Molded component; 51. Support base; 52. Molded block; 521. Slot; 522. Chamber; 53. Sealing cover; 54. Protrusion; 6. Channel; 7. Seal. Detailed Implementation

[0034] Reference Figures 1 to 5 The embodiments of the cell sieve forming mold and its forming method of the present invention are further described below.

[0035] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0037] A cell sieve forming mold includes a forming shell 1, the forming shell 1 including a forming base 2 and a cover 3 disposed above the forming base 2, the forming base 2 having a plurality of forming grooves 4, each forming groove 4 being configured to install a forming component 5, the forming component 5 including a support base 51, a forming block 52 disposed outside the support base 51 and a sealing cover 53 disposed on the top of the forming block 52, and a channel 6 for injection molding being provided between the forming component 5 and the forming base 2.

[0038] The molding block 52 is provided with a slot 521, which cooperates with the inner wall of the molding tank 4 to form a cavity 522 for injection molding.

[0039] The cover 3 is provided with several through holes 31. After the cover 3 is installed on the molding base 2, the position of the through holes 31 matches the position of the molding groove 4.

[0040] Preferably, the through hole 31 is further provided with an abutment step 32, and the top of the sealing cover 53 is provided with a protrusion 54 that matches the abutment step 32. After the sealing cover 53 is installed in the cover body 3, the bottom of the sealing cover 53 and the top of the support base 51 form a gap for placing the screen.

[0041] Preferably, the cover 3 is further provided with an injection hole in the middle, the injection hole is connected to the channel 6, and an injection groove is provided between the channel 6 and each of the molding grooves 4, the raw material in the channel 6 enters the molding groove 4 through the injection groove.

[0042] Preferably, the top of the cover 3 is further provided with a sealing element 7, which is configured to seal each through hole 31 of the cover 3 and at least leave an inlet for injection molding.

[0043] This application also discloses a method for forming a cell sieve forming mold, including the following steps: S1, selecting the corresponding cell sieve forming mold based on the cell sieve to be formed;

[0044] S2. Install the molding block and support base inside the molding base, and place the screen on top of the support base. After the screen is placed, install the cover on the molding base, and place the sealing cover in each through hole of the cover. The sealing cover and the support base press the screen together.

[0045] S3. After the sealing cover is installed, install a sealing element on the top of the cover to seal the gap between the sealing cover and the cover.

[0046] S4. Connect the injection molding machine to the inlet of the seal and turn on the injection molding machine;

[0047] S5. The injection molding machine injects molten raw material into the channel. The raw material inside the channel is injected into the molding tank through the injection tank between the molding tank and the channel and fills the cavity between the molding block and the molding tank.

[0048] S6. After the raw material filling is completed, stop the injection of raw material and hold the mold under pressure for a time of T.

[0049] S7. After time period T, remove the seal and cover, and take out the completed cell sieve assembly;

[0050] S8. Process the cell sieve assembly, cut off excess material at the channel, and complete the forming of the cell sieve.

[0051] Preferably, step S6 further includes raw material filling detection, including the following steps: S61, setting the pressure threshold of the outlet to Pm, and detecting the pressure of the injection molding machine outlet during the injection of raw material, with the detection value being P;

[0052] S62. When injecting raw material, if P < Pm, it is determined that the current raw material has not filled the cavity in the molding die, and the injection molding machine continues to discharge material from the outlet. Conversely, if P ≥ Pm, it is determined that the current raw material has filled the cavity in the molding die, and the process jumps to S63 to perform pressure holding state detection.

[0053] S63. The injection molding machine stops discharging material and performs pressure holding for a time of T1. During the pressure holding process, the pressure at the injection molding machine outlet is continuously monitored, and the monitored value is P1.

[0054] S64. If P1 decreases during the T1 time period, it is determined that there is a leak in the molding die or that a cavity is not completely filled. After P1 stabilizes, discharge the material again and make P1 = 1.5Pm.

[0055] S65. Check P1 again. If P1 drops, it is determined that there is a leak in the current molding mold. The injection molding machine stops and the current mold is checked for leaks. Conversely, if P1 remains unchanged, it is determined that the cavity in the current mold is filled.

[0056] This application enables high-speed and efficient molding of cell sieves through injection molding within a molding die. Specifically, this application uses a molding shell 1 and molding components 5, and injects molten plastic into a chamber 522 via an injection channel 6 for molding. The overall automation level is high, requiring no manual intervention and reducing the overall molding difficulty. Furthermore, this application has multiple chambers 522, allowing for the simultaneous processing of multiple cell sieves, resulting in high overall processing efficiency. The sieves exhibit high bonding strength after processing, leading to a high product qualification rate and preventing the cell sieves from detaching. Additionally, a pressure-holding stage is incorporated after injection molding to optimize the quality of the finished product. This achieves fully automated processing from mold assembly to product demolding, with simple overall processing steps and a high degree of automation.

[0057] Furthermore, the mold is formed by a slot 521 and a forming groove 4. The slot 521 and the inner wall of the forming groove 4 cooperate to form a cavity 522. The cavity 522 is automatically formed after the forming block 52 is installed, simplifying the assembly process. During assembly, gaps are formed for installing the cell screen, ensuring accurate positioning of the screen during the pressing process and preventing screen displacement or loosening, thereby improving the consistency and structural integrity of the finished product. At the same time, during the assembly of the forming mold, each component of the forming mold is provided with positioning holes, so that no additional positioning is required during installation, reducing operator error and preventing screen offset. The shape of the cavity 522 can be changed by changing the shape of the mold and the forming block 52, making it suitable for the production of cell screens of different specifications, improving the overall adaptability and practicality.

[0058] Meanwhile, during the molding process of the cell sieve, the channel 6 connects each injection tank and injects the raw material in the injection hole into the molding tank 4. The molten raw material can be injected quickly and evenly into the chambers 522 of multiple molding tanks 4, realizing the molding of multiple cell sieves at one time, which greatly shortens the production cycle. In addition, the sealing of the molding mold is ensured during the injection molding process, so that the raw material in the molten state can fully fill the space inside the molding tank 4, ensuring the integrity of the finished product and the high qualification rate of the finished product.

[0059] Furthermore, after the raw material injection is completed, a pressure-holding step is set up to detect the pressure value inside the molding die within a predetermined time. Specifically, if the raw material is completely filled, so that there are no gaps in the chamber 522, the pressure value changes little after the injection of raw material stops. Conversely, if the raw material is not completely filled or the molding die leaks, the pressure value inside the die will drop. By detecting the pressure value, it can be ensured that the raw material completely fills the inside of the die, ensuring that the shape of the raw material after curing meets the requirements, so that the edge of the screen is completely sealed, avoiding the risk of cell contamination due to tiny gaps, and improving the accuracy of subsequent experimental processes.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A cell screen forming mold comprising a forming housing (1), characterized in that, The shaped shell (1) comprises a shaped base (2) and a cover (3) arranged above the shaped base (2), the shaped base (2) is provided with a plurality of shaped grooves (4), each shaped groove (4) is configured to install a shaped component (5), the shaped component (5) comprises a support base (51), a shaped block (52) arranged outside the support base (51), and a sealing cover (53) arranged on the top of the shaped block (52), and a channel (6) for injection molding is arranged between the shaped component (5) and the shaped base (2).

2. A cell screen forming die according to claim 1, wherein, The shaped block (52) is provided with a slot (521), and the slot (521) cooperates with the inner wall of the shaped groove (4) to form a cavity (522) for injection molding.

3. The cell screen forming die of claim 1, wherein, The cover (3) is provided with a plurality of through holes (31), and the positions of the through holes (31) match the positions of the shaped grooves (4) after the cover (3) is installed on the shaped base (2).

4. A cell screen forming die according to claim 3, wherein The through hole (31) is also provided with a resisting step (32), the top of the sealing cover (53) is provided with a protrusion (54) matched with the resisting step (32), and the bottom of the sealing cover (53) forms a gap with the top of the support base (51) for placing the screen after the sealing cover (53) is installed in the cover (3).

5. A cell screen forming die according to claim 4, wherein, The middle of the cover (3) is also provided with an injection hole, the injection hole is communicated with the channel (6), and an injection groove is further arranged between the channel (6) and each shaped groove (4), and the raw material in the channel (6) enters the shaped groove (4) through the injection groove.

6. A cell screen forming die according to claim 5, wherein, The top of the cover (3) is also provided with a sealing element (7), which is configured to seal each through hole (31) of the cover (3) and leave at least an inlet for injection.

7. A method of forming a cell screen forming mold suitable for use in any one of claims 1-6, comprising the steps of: The steps include: S1, based on the cell screen to be shaped, select the corresponding cell screen shaping mold; S2, install the shaped block and the support base in the shaped base, and place the screen on the top of the support base, install the cover on the shaped base after the screen is placed, and place the sealing cover in each through hole of the cover, and the sealing cover and the support base press the screen; S3, after the sealing cover is installed, install the sealing element on the top of the cover, and seal the gap between the sealing cover and the cover; S4, connect the inlet of the injection molding machine with the sealing element, and start the injection molding machine; S5, the injection molding machine injects the raw material in a molten state into the channel, and the raw material in the channel enters the shaped groove through the injection groove between the shaped groove and the channel, and fills the cavity between the shaped block and the shaped groove; S6, after the raw material is filled, stop injecting the raw material, and keep the pressure of the shaped mold for T time; S7, after T time, remove the sealing element and the cover, and take out the shaped cell screen combination; S8, process the cell screen combination, cut off the excess raw material at the channel, and complete the shaping of the cell screen.

8. The forming method of a cell sieve forming mold according to claim 7, characterized in that, The step S6 further includes raw material filling detection, including the following steps: S61, set the pressure threshold of the discharge port as Pm, detect the pressure of the discharge port of the injection molding machine during the injection of the raw material, and the detection value is P. S62, when injecting raw materials, if P < Pm, it is judged that the current raw materials are not filled in the cavity of the molding mold, and the discharge port of the injection molding machine continues to discharge, otherwise, if P ≥ Pm, it is judged that the current raw materials are filled in the cavity of the molding mold, and it is jumped to S63 for pressure maintaining state detection; S63, the injection molding machine stops discharging and performs pressure maintaining, and the pressure maintaining time is T1, and in the process of pressure maintaining, the pressure of the discharge port of the injection molding machine is continuously detected, and the detection value is P1; S64, in the T1 time period, if P1 decreases, it is judged that leakage occurs in the molding mold or the cavity is not completely filled, after P1 is stable, discharging is performed again, and P1 = 1.5Pm; S65, P1 is detected again, if P1 decreases, it is judged that the current molding mold leaks, the injection molding machine stops and the current mold is detected for leakage, otherwise, if P1 remains unchanged, it is judged that the cavity in the current mold is filled.

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