CN117002028A - Processing method of plastic filter element and plastic filter element - Google Patents

Abstract

A processing method of a plastic filter element and the plastic filter element, wherein the processing method comprises the following steps: heating and sintering a plurality of batches of plastic raw materials respectively to obtain a plurality of plastic matrixes; splicing the plurality of plastic substrates into a preset shape in a contact manner, and enabling the functional accessory to be at least partially contacted with at least one plastic substrate; and sintering and fixing the adjacent contacted plastic matrix and the functional accessory into a whole to obtain the plastic filter element. The plastic filter element has the advantages that the core body part of the plastic filter element is divided into the plurality of parts to be sintered and shaped to form the plurality of plastic matrixes, and then the functional accessories and the plastic core body are combined and sintered for fixation, so that the assembly and sintering difficulty of the component parts of the plastic filter element can be effectively reduced, the integral structural integrity and stability of the plastic filter element are improved, the structure of the used processing die is simpler, the production cost is reduced, and the production efficiency is improved.

Description

Processing method of plastic filter element and plastic filter element

Technical Field

The application relates to the technical field of filter elements, in particular to a processing method of a plastic filter element and the plastic filter element.

Background

The plastic filter element (such as an ultra-high molecular weight polyethylene filter element or a PE filter element) has good filtration and air permeability, certain toughness and strength, and is widely applied in the fields of biological medicine, clinical diagnosis, chemical analysis, sample treatment, precise filtration and the like. In some application fields, the plastic filter element needs to be combined and fixed with other materials/components so that the plastic filter element plays an additional role; for example, the plastic filter element is combined and fixed with the heating element, and the liquid stored in the plastic filter element can be atomized by utilizing the thermal effect of the heating element, so that the liquid mist is slowly released. However, due to the limitation of the existing processing technology and other factors, the plastic filter element and the part to be assembled are fixed with great difficulty, high production cost, low processing efficiency and yield and other problems.

Disclosure of Invention

The application mainly solves the technical problem of providing a processing method of a plastic filter element and the plastic filter element processed by the processing method so as to achieve the purpose of reducing processing difficulty and cost.

According to a first aspect, in one embodiment, a method for processing a plastic filter element is provided, including the steps of:

filling a first preset amount of plastic raw materials into a matrix forming die, and heating and sintering to obtain a first formed body; filling a second preset amount of plastic raw materials into the matrix forming die, and heating and sintering to obtain a second formed body; and the like, N plastic matrixes are obtained, wherein N is an integer greater than or equal to 2;

installing the functional accessory and the N plastic matrixes in a filter element forming die, enabling the N plastic matrixes to be in contact and spliced into a preset shape, and enabling at least one plastic matrix to be at least partially in contact with the functional accessory;

and sintering and fixing the plastic matrix and the functional accessory which are in adjacent contact into a whole in the filter element forming die, so as to obtain the plastic filter element.

In one embodiment, the matrix-forming mold comprises a first mold having a groove structure and a second mold having a raised structure opposite the groove structure; when the first die and the second die are matched, a first forming cavity can be formed between the groove structure and the protruding structure in a sealing mode; the first molding cavity is used for containing the plastic raw material.

In one embodiment, the raised structure is configured to: when the first die and the second die are assembled, two opposite end faces of the protruding structure in the length direction of the protruding structure are abutted against the groove wall of the groove structure, and the first molding cavity is formed between the side face of the protruding structure in the length direction of the protruding structure and the groove wall of the groove structure.

In one embodiment, the filter element forming mold comprises a third mold and a fourth mold, wherein the third mold is provided with a first groove for placing one part of the N plastic matrixes, and the fourth mold is provided with a second groove for placing another part of the N plastic matrixes;

when the third die and the fourth die are matched, a second molding cavity between the first groove and the second groove can be formed; the second molding cavity is used for accommodating the plastic substrates and enabling N plastic substrates to be in contact and spliced into a hollow cylindrical body.

In one embodiment, the cartridge molding die further comprises a fifth die for receiving the functional attachment; after the third die and the fourth die are matched, the fifth die stretches into the hollow cylindrical body, and the functional accessory is kept in contact with the inner peripheral surface of the hollow cylindrical body.

In one embodiment, the fifth mold has an insert and an extension; the embedded part is arranged at one end of the extension part and is used for placing the joint part of the functional accessory and enabling the joint part to keep contact with the inner peripheral surface of the hollow cylindrical body; the extension is used for placing a pin part of the functional accessory so that one end of the pin part, which is far away from the joint part, can be led out of the hollow cylindrical body.

In one embodiment, the extension part is provided with a containing groove, and the containing groove extends from one end of the extension part, which is close to the placement part, to one end, which is far away from the placement part; the accommodating groove is used for accommodating the pin part and enabling the joint part to be positioned and kept on the imbedding part in a winding mode.

In one embodiment, the plastic raw material is at least one of polyethylene, polypropylene and polyvinylidene fluoride; the functional accessory is made of electrothermal metal materials.

In one embodiment, the heating temperature for heating and sintering the plastic raw material is 240-270 ℃ and the heating time is 10-20min;

and/or sintering and fixing the plastic matrix and the functional accessory, wherein the heating temperature is 240-270 ℃ and the heating time is 10-20min.

According to a second aspect, an embodiment provides a plastic filter element, which is manufactured by the method for manufacturing a plastic filter element according to the first aspect.

The processing method of the plastic filter element according to the embodiment comprises the following steps: heating and sintering a plurality of batches of plastic raw materials respectively to obtain a plurality of plastic matrixes; splicing the plurality of plastic substrates into a preset shape in a contact manner, and enabling the functional accessory to be at least partially contacted with at least one plastic substrate; and sintering and fixing the adjacent contacted plastic matrix and the functional accessory into a whole to obtain the plastic filter element. The plastic filter element has the advantages that the core body part of the plastic filter element is divided into the plurality of parts to be sintered and shaped to form the plurality of plastic matrixes, and then the functional accessories and the plastic core body are combined and sintered for fixation, so that the assembly and sintering difficulty of the component parts of the plastic filter element can be effectively reduced, the integral structural integrity and stability of the plastic filter element are improved, the structure of the used processing die is simpler, the production cost is reduced, and the production efficiency is improved.

Drawings

FIG. 1 is a process flow diagram of a plastic filter cartridge according to one embodiment.

FIG. 2 is a schematic diagram illustrating an assembly process of a plastic substrate and a functional attachment in a processing method according to an embodiment.

Fig. 3 is a schematic exploded view of a matrix-forming mold according to an embodiment.

Fig. 4 is a schematic structural view of a fifth mold in the filter element forming mold according to an embodiment in an applied state.

Fig. 5 is a schematic perspective view of a plastic filter cartridge according to one embodiment.

In the figure:

10. a plastic core; 11. a plastic substrate; 20. a functional attachment; 21. a joint; 22. a lead portion; A. a matrix forming die; 30. a first mold; 31. a first die-bonding surface; 32. a groove structure; 40. a second mold; 41. a second die-bonding surface; 42. a bump structure; B. a filter element forming die; 50. a third mold; 51. a third die-bonding surface; 60. a fourth die; 61. a fourth die-bonding surface; 62. a second groove; 70. a fifth die; 71. an insertion part; 72. an extension part; 73. an accommodating groove.

Detailed Description

The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.

The processing method of the plastic filter element provided by the application adopts a secondary sintering process to realize the processing and shaping of the plastic filter element, namely: firstly, dividing a plastic core body of a target plastic filter element into a plurality of parts for sintering and shaping (namely, one-time sintering is carried out, so that distinguishing and description are facilitated, the plurality of parts for sintering and shaping are defined as plastic matrixes), and then, carrying out structural positioning and assembly on the plurality of plastic matrixes and functional accessories; and finally, sintering and fixing the functional accessory and the plastic matrix into a whole through secondary sintering, thereby obtaining the required plastic filter element.

On the one hand, the plastic core body part of the plastic filter element is divided into a plurality of parts for sintering, so that the sintering difficulty of the plastic core body can be reduced, the manufacturing efficiency of the plastic filter element can be improved, and the structural complexity and the configuration cost of a corresponding forming die can be reduced; on the other hand, after the functional accessories and the plastic matrixes are assembled, secondary sintering is carried out, so that the assembly and shaping of the plastic filter element can be conveniently and rapidly finished, conditions are created for improving the production efficiency, the combination of the functional accessories and the plastic core body is more stable, and the plastic filter element can be endowed with more abundant functions by means of the functional accessories.

Referring to fig. 1 to 3 in combination with fig. 5, an embodiment provides a processing method and a processing mold for a plastic filter element, which can process and manufacture a plastic filter element formed by sintering and fixing a plastic core 10 and a functional accessory 20 into a whole; the processing mold comprises a matrix forming mold A used in the processing and manufacturing process of the plastic matrix 11 (namely, a primary sintering process) and a filter element forming mold B used in the combining and fixing process of the plastic matrix 11 and the functional accessory 20 (comprising a secondary sintering process).

In order to more clearly describe the processing method of the plastic filter element and the processing mold used in the processing process, the processing method mainly uses the plastic filter element with the overall outline of a hollow cylindrical structure as an example, and the flow steps of the processing method and the structure of the processing mold are described below. However, it should be noted that the machining method is also applicable to machining plastic filter elements having other structural forms of the functional attachment 20, and the machining die is also required to be correspondingly adjusted or designed.

In one embodiment, referring to fig. 2 and 3, the matrix forming mold a includes a first mold 30 and a second mold 40, where the first mold 30 and the second mold 40 cooperate with each other to complete filling of the plastic raw material and sintering shaping of the plastic matrix 11; the filter element forming die B comprises a third die 50 and a fourth die 60, and the third die 50 and the fourth die are matched with each other, so that the assembly and the fixation of the functional accessory 20 and the plastic matrix 11 and the sintering and shaping of the plastic filter element can be realized.

The first mold 30 has a first die-bonding surface 31 and a groove structure 32 recessed in the first die-bonding surface 31; correspondingly, the second die 40 is provided with a second die-bonding surface 41 and a convex structure 42 protruding from the second die-bonding surface 41; when the first mold 30 and the second mold 40 are closed (i.e. the first die-closing surface 31 and the second die-closing surface 41 are in sealing fit), the protruding structure 42 is inserted into the groove structure 32 in an aligned manner, so that a first molding cavity for accommodating or filling plastic raw materials is formed between the protruding structure 42 and the groove structure 32 in a sealing manner.

In particular embodiments, the raised structures 42 may be configured to: when the protrusion structure 42 is aligned and inserted into the groove structure 32, two opposite end surfaces of the protrusion structure 42 in the length direction can abut against the groove wall of the groove structure 32, and a preset gap is formed between the side wall of the protrusion structure 42 in the length direction and the groove wall of the groove structure 32; thus, the curved or folded sheet-like plastic substrate 11 having a semicircular sectional shape, an arc-shaped sectional shape, or the like can be manufactured by the substrate molding die a.

The third die 50 has a third die surface 51 and a first groove (not shown) recessed in the third die surface 51; the fourth die 60 has a fourth die-bonding surface 61 and a second groove 62 recessed in the fourth die-bonding surface 61; when the third mold 50 and the fourth mold 60 are closed (i.e., the third die-bonding surface 51 and the fourth die-bonding surface 61 are in sealing contact), a second molding cavity capable of accommodating the plastic substrate 11 and the functional accessories 20 can be enclosed between the third groove and the second groove 62.

The processing method includes steps 100 to 300, which are specifically described below.

Step 100, filling a first preset amount of plastic raw material into a first molding cavity, and heating and sintering to obtain a first molding body; filling a second preset amount of plastic raw material into the first molding cavity, and heating and sintering to obtain a second molding body; and so on, N independent plastic substrates 11 are obtained; wherein N is an integer greater than or equal to 2.

Specifically, referring to fig. 3, according to the material of the plastic filter element (specifically, the plastic core 10) that is required to be processed and manufactured, a mixture of one or more of a predetermined amount of polyethylene, polypropylene, and polyvinylidene fluoride may be filled into the groove structure 32 of the first mold 30, and the plastic raw material is defined in the first molding cavity by closing the first mold 30 and the second mold 40; subsequently, the matrix-forming die a filled with the plastic raw material is put into a sintering device (e.g., a sintering furnace) to be heated, so that the plastic raw material is melted, expanded, extruded and bonded in a limited first forming cavity; wherein the heating temperature can be controlled at 240-270 ℃ and the heating time can be controlled at 10-20min; after the heating and sintering process is completed, the matrix forming die A is moved out of the sintering device to be cooled, and then the matrix forming die A is removed to obtain the plastic matrix 11 with a fixed shape.

The above matrix forming mold a is recycled to sinter the plastic raw material, or a plurality of matrix forming molds a are used simultaneously, so as to finally obtain a plurality of plastic matrixes 11 with the same structural shape, such as two, three or more.

The structural shapes of the groove structures 32 and the protrusion structures 42 (i.e., the shape of the first molding cavity) are determined by the shape of the plastic substrate 11 to be manufactured, for example, the plastic substrate 11 is in a sheet shape as a whole, and the cut-off surface of the plastic substrate 11 is in a semicircular shape or other geometric shape. That is, when the shapes and sizes of the plastic substrates 11 to be manufactured are different, it is also necessary to provide the corresponding substrate molding dies a and adjust the amounts of the plastic raw materials of the plastic substrates 11.

Step 200, the functional attachment 20 and the N plastic substrates 11 are installed in the filter element forming mold B, such that the N plastic substrates 11 are contact-spliced into a preset shape, and such that the functional attachment 20 is kept at least partially in contact with the at least one plastic substrate 11.

Specifically, referring to fig. 2, a part of N plastic substrates 11 is mounted in a first groove of the third mold 50, another part of N plastic substrates 11 is mounted in a second groove 62 of the fourth mold 60, and then the functional attachment 20 is mounted on the plastic substrate 11 located in the first groove or the second groove 62; subsequently, by closing the third mold 50 and the fourth mold 60, the N plastic substrates 11 are contact-spliced into a hollow cylindrical body, and the functional attachment 20 is arranged inside the hollow cylindrical body in a fixed contact. Thus, the functional attachment 20 and the plastic base 11 are spliced and combined according to the shape of the plastic filter element after shaping.

For example, two plastic substrates 11 having semicircular sectional shapes and the same size can be manufactured by sintering with the substrate molding die a, and the sectional shapes of the first groove and the second groove 62 are set to be semicircular correspondingly; after the two plastic substrates 11 are respectively placed in the first groove and the second groove 62, when the third die 50 and the fourth die 60 are matched, the two plastic substrates 11 can be contacted and spliced into a hollow cylindrical body in a circular cylinder shape; in this case, the functional attachment 20 may take a sleeve-type or cylinder-type structure capable of maintaining close contact with the inner peripheral surface of the hollow cylindrical body.

And 300, sintering and fixing the adjacent contacted plastic matrix 11 and the functional accessory 20 into a whole in a filter element forming die B, thereby obtaining the required plastic filter element.

Specifically, after the functional accessory 20 and the plastic substrate 11 are combined and fixed in the filter element forming die B, the filter element forming die B is placed into a sintering device to be heated, the heating temperature can be controlled to be 240-270 ℃, and the heating time can be controlled to be 10-20min; so that the parts of the plastic base 11 that are in contact with each other and the parts that are in contact with the functional attachment 20 are bonded by melting; after the heating and sintering process is completed, the filter element forming die B is moved out of the sintering device to be cooled, and then the filter element forming die B is removed to obtain the plastic filter element (please refer to FIG. 5) with the functional accessory 20 and the plastic matrix 11 sintered and fixed into a whole; wherein the plastic cartridge is understood to be plastic cartridge 10 except for functional attachment 20; the plastic core 10 retains the basic functions of filtering, extracting, separating and the like of the plastic filter core.

Based on this, through dividing into a plurality of parts with the main part of plastics filter core and sintering design respectively, and later with function annex 20 and a plurality of plastics base member 11 combination carry out the secondary sintering design, not only can effectively reduce the degree of difficulty of plastics filter core part equipment and sintering design, improve the structural integrity and the stability of plastics filter core, the structure of the mold processing that uses is simpler moreover, use more nimble, is favorable to improving production efficiency, reduction mould configuration cost.

In one embodiment, referring to fig. 2 and 4, the filter element forming mold B further includes a fifth mold 70 that is used in cooperation with the third mold 50 and the fourth mold 60, and during the process of combining and splicing the functional accessory 20 and the plastic substrate 11 and during the process of secondary sintering, the functional accessory 20 may be fixed by using the fifth mold 70, or the inner side of a hollow cylindrical body formed by splicing the plurality of plastic substrates 11 in contact by using the fifth mold 70 may be used to provide structural support for the functional accessory 20 and the plastic substrate 11, so as to ensure that the functional accessory 20 is kept in contact with the plastic substrate 11 or the inner peripheral surface of the hollow cylindrical body, and avoid the functional accessory 20 and the plastic substrate 11 from being shifted in position in the second forming cavity.

More specifically, the functional attachment 20 may be fixedly placed on the fifth mold 70 in advance, and then the functional attachment 20 is placed on the plastic base 11 located in the first recess or the second recess 62 by means of the fifth mold 70; after the third mold 50 and the fourth mold 60 are closed, the fifth mold 70 and the functional accessory 20 extend into the hollow cylindrical body, so as to provide structural support for fixing the relative position between the functional accessory 20 and the plastic substrate 11, and further effectively avoid the influence on the final shape or structural stability of the plastic filter element due to the position deviation of the functional accessory 20 or the plastic substrate 11 in the secondary sintering process.

In one embodiment, referring to fig. 2 and 4, the fifth mold 70 has a generally cylindrical structure as a whole, and has an insertion portion 71 and an extension portion 72, wherein the insertion portion 71 is disposed at one end of the extension portion 72; suitably, the functional accessory 20 then has an engagement portion 21 and a pin portion 22; wherein, the imbedding part 71 can be set to be approximately the same as the shape of the inner space of the hollow cylinder, and the joint part 21 can be wrapped and placed outside the imbedding part 71 by adopting a curled structure; while the pins 22 of the functional attachment 20 are fixedly mounted on the extensions 72.

Thus, after the third mold 40 and the fourth mold 50 are clamped, the joint portion 21 corresponding to the insertion portion 71 together with the functional attachment 20 is inserted into the hollow cylindrical body, the joint portion 21 is held in contact with the inner peripheral surface of the hollow cylindrical body by the insertion portion 71, and structural support is provided for fixing the relative positions of the joint portion 21 and the plastic base 11; the extension 72 can lead the lead portion 22 out of the hollow cylindrical body, thereby preventing the lead portion 22 from contacting the plastic base 11 and maintaining the final molded structure of the plastic filter element.

In the final-molded plastic filter element, the leg portion 22 corresponds to a portion protruding from the plastic core 10, and when the plastic filter element is used, the plastic filter element and the relevant functional members may be connected to each other by the leg portion 22, for example, the leg portion 22 may be connected to a power source, and a power supply circuit may be formed in the joint portion 21, so that the joint portion 21 is caused to heat the liquid medium stored in the plastic filter element by heat generation, and the plastic filter element may be used as an atomization core.

In one embodiment, referring to fig. 4, the extension portion 72 is provided with a receiving groove 73, and the receiving groove 73 extends from one end of the extension portion 72 near the placement portion 71 toward one end far from the placement portion 71; by means of the receiving groove 72, a receiving space can be provided for the pin part 22, so that the pin part 22 can be fixedly arranged on the extension part 72 in a clamping-like manner, thereby positioning and retaining the joint part 21 on the insertion part 71 in a winding-like manner, and providing structural conditions for realizing rapid and accurate arrangement and fixing of the functional accessory 20 on the fifth die 70. In addition, the insertion portion 71 may be abutted against the wall of the second molding cavity to define a position where the joint portion 21 extends into the hollow cylindrical body.

Referring to fig. 5, the embodiment of the present application further provides a plastic filter element, which is manufactured by the processing method of the above embodiment, and includes a plastic core 10 and a functional accessory 20; wherein the plastic core 10 is a porous material body or porous structure body made of one or more materials such as polyethylene, polypropylene, polyvinylidene fluoride, etc., the plastic core 10 can be understood as a structural part of the plastic filter core which retains the basic functions of the filter core (such as separation, extraction, filtration, etc.); the functional attachment 20 is integrally secured to the plastic core 10 to impart additional other functions to the plastic filter element.

For example, the functional attachment 20 may be a structure of electrically heated metal material, and by supplying power to the functional attachment 20, the thermal effect of the functional attachment 20 may be used to heat the liquid medium stored in the atomized plastic core 10, thereby allowing the plastic filter element to be used as an atomized core.

For another example, the functional accessory 20 may be other suitable materials, and the plastic core 10 or the plastic filter element may be stably assembled on experimental equipment such as a filter element suction head, a pipette, or other application devices by utilizing the structural characteristics that the functional accessory 20 and the plastic core 10 are fixedly combined into a whole.

In one embodiment, referring to fig. 5, the plastic core 10 is generally a hollow cylindrical structure, such as a hollow circular cylinder structure; the functional accessory 20 is of an integrated structure and is provided with a joint part 21 and a pin part 22; wherein, the joint part 21 is fixed on the inner peripheral surface of the plastic core 10 in a contact fitting or embedding structure, and in the specific implementation, the joint part 21 adopts a sleeve type structure body with a mesh structure, so as to increase the contact fitting or embedding range area of the joint part 21 and the inner peripheral surface of the plastic core 10 and improve the combined and fixed structural strength of the functional accessory 20 and the plastic core 10. The lead part 22 is led out from the inside of the plastic core 10 to the outside so as to establish a structural connection relationship with other functional components when the plastic filter element is applied; for example, the plastic filter element is used as an atomizing core, and the pin portion 22 can be connected with a power supply, so that the joint portion 21 heats and atomizes the liquid medium stored in the plastic core 10 due to heat generation, and the plastic filter element is caused to slowly release the liquid mist.

In other embodiments, the respective structural forms and the combined fixing forms of the plastic core 10 and the functional accessory 20 can also be selected according to the actual application requirements or structural design conditions of the plastic filter element; for example, the plastic core 10 may be a solid cylinder structure or a block structure commonly used in the prior art, and at least part of the functional accessory 20 may be fixed inside the plastic core 10 in an inserting manner or fixed outside the plastic core 10 in a contact fitting manner; in this case, the details are not described here.

The foregoing description of the application has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the application pertains, based on the idea of the application.

Claims (10)

1. The processing method of the plastic filter element is characterized by comprising the following steps:

filling a first preset amount of plastic raw materials into a matrix forming die, and heating and sintering to obtain a first formed body; filling a second preset amount of plastic raw materials into the matrix forming die, and heating and sintering to obtain a second formed body; and the like, N plastic matrixes are obtained, wherein N is an integer greater than or equal to 2;

installing the functional accessory and the N plastic matrixes in a filter element forming die, enabling the N plastic matrixes to be in contact and spliced into a preset shape, and enabling at least one plastic matrix to be at least partially in contact with the functional accessory;

and sintering and fixing the plastic matrix and the functional accessory which are in adjacent contact into a whole in the filter element forming die, so as to obtain the plastic filter element.

2. The method of processing of claim 1, wherein the matrix-forming mold comprises a first mold having a groove structure and a second mold having a raised structure opposite the groove structure; when the first die and the second die are matched, a first forming cavity can be formed between the groove structure and the protruding structure in a sealing mode; the first molding cavity is used for containing the plastic raw material.

3. The method of processing of claim 2, wherein the raised structure is configured to: when the first die and the second die are assembled, two opposite end faces of the protruding structure in the length direction of the protruding structure are abutted against the groove wall of the groove structure, and the first molding cavity is formed between the side face of the protruding structure in the length direction of the protruding structure and the groove wall of the groove structure.

4. The method of processing of claim 1 wherein said cartridge forming die comprises a third die and a fourth die, said third die having a first recess for receiving one of N said plastic substrates and said fourth die having a second recess for receiving another of N said plastic substrates;

when the third die and the fourth die are matched, a second molding cavity between the first groove and the second groove can be formed; the second molding cavity is used for accommodating the plastic substrates and enabling N plastic substrates to be in contact and spliced into a hollow cylindrical body.

5. The method of processing of claim 4, wherein the cartridge forming die further comprises a fifth die for receiving the functional attachment; after the third die and the fourth die are matched, the fifth die stretches into the hollow cylindrical body, and the functional accessory is kept in contact with the inner peripheral surface of the hollow cylindrical body.

6. The method of processing according to claim 5, wherein the fifth die has an insert portion and an extension portion; the embedded part is arranged at one end of the extension part and is used for placing the joint part of the functional accessory and enabling the joint part to keep contact with the inner peripheral surface of the hollow cylindrical body; the extension is used for placing a pin part of the functional accessory so that one end of the pin part, which is far away from the joint part, can be led out of the hollow cylindrical body.

7. The method of claim 6, wherein the extension portion is provided with a receiving groove extending from an end of the extension portion near the insertion portion toward an end far from the insertion portion; the accommodating groove is used for accommodating the pin part and enabling the joint part to be positioned and kept on the imbedding part in a winding mode.

8. The processing method according to any one of claims 1 to 7, wherein the plastic raw material is at least one of polyethylene, polypropylene and polyvinylidene fluoride; the functional accessory is made of electrothermal metal materials.

9. The processing method according to claim 8, wherein the heating temperature for heating and sintering the plastic raw material is 240-270 ℃ for 10-20min;

and/or sintering and fixing the plastic matrix and the functional accessory, wherein the heating temperature is 240-270 ℃ and the heating time is 10-20min.

10. A plastic filter cartridge, characterized in that it is manufactured by a method according to any one of claims 1-9.