Preparation Method and Special Tooling for Medical Parallel Fiber Grid Filter

Abstract

The present invention provides a preparation method and a special tooling for a medical parallel fiber grid-shaped filter screen, comprising the following steps: spirally winding filter fibers on the support rods of a circular winding disc in sequence. A plurality of detachable temporary support rods are arranged along the circumference of the winding disc, and two support rods that radially separate outward are further arranged at opposite positions on the circumference; after the filter fibers are wound for at least one layer, connecting a tension support rod to the end of the support rod; tensioning the tension support rod in a constant tension mode, and sequentially removing the temporary support rods; installing a support rod; and preparing a medical parallel fiber grid-shaped filter screen through the above steps. The present invention replaces the existing mesh structure with a grid-shaped structure, and can precisely control the filtration accuracy by controlling the gap between the filter fibers, can greatly reduce the preparation difficulty of the filter screen with such a grid-shaped structure, and precisely control the gap between the filter fibers. The special tooling can improve the preparation efficiency and reduce the preparation difficulty.

Description

Technical Field

[0001] The present invention relates to the field of air treatment in medical devices, and particularly to a preparation method and special tooling for a medical parallel fiber grid-shaped filter screen. Background Art

[0002] There are usually two structures for the filter screens used in medical device air treatment equipment. One is a filter screen with a disordered stacked fiber structure. As shown in Figure 11 , the filter screen is prepared through processes such as wire drawing, film stretching, or melt blowing. Most of the fibers in this filter screen show a disordered arranged and stacked structure. The problem is that it is difficult to control the pore size of the filter screen. Improving the filtration effect depends on the adsorption force generated by the applied static electricity, which makes the filtration effect unsatisfactory. Moreover, as the usage time increases, the static electricity will gradually be lost, further affecting the filtration effect. The other is a woven filter screen, and its microscopic structure is as shown in Figure 12 . It is usually woven with ultra-low diameter glass fibers. The pore size between the fibers constitutes the pore size for filtration. The problem with this structure is that limited by the minimum diameter of the fibers, it is difficult to further reduce the pore size of the fiber diameter. Currently, the thinnest industrial glass fiber diameter can only reach 0.02 mm. Moreover, the ratio of the pore area to the planar area of this structure is small, resulting in too high air resistance and low filtration efficiency. Chinese patent document CN 107715151 A records a medical air disinfection and purification device and its air disinfection and purification system, which records a filter screen with a composite structure and a scheme for filtering using a porous alumina membrane. However, the processing difficulty of forming controllable diameter pores is large, resulting in a very high manufacturing cost for this scheme. It is intended to produce a parallel fiber grid-shaped filter screen to improve the filtration accuracy and filtration effect. As shown in Figure 12 , the pore size between the fibers is affected by the weft. 1. It is difficult to further reduce the pore size. 2. The proportion of the pore area is too small. The structure of the parallel fiber grid-shaped filter screen can overcome this technical problem, but there are major difficulties in the production of this structure. When the inventor conducted tests and wound on a planar frame, during the winding process, the tension of the filter fibers was uneven, resulting in easy wire breakage, and the tension distribution was uneven, and the pore size distribution was also uneven. It should be noted that the background art is only a description of the technical problems for easy understanding and does not mean an admission of the prior art. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a preparation method for a medical parallel fiber grid-shaped filter screen, which can make the tension of the filter fibers uniform during the winding process, not easily cause wire breakage, and the pore size can also be evenly distributed, ensuring the quality of the medical parallel fiber grid-shaped filter screen.

[0004] Another technical problem to be solved by the present invention is to provide a special tooling for medical parallel fiber grid filter, which can ensure that the tension of the filter fiber is uniform during the winding process, and it is not easy to break the wire, and the pore size can be evenly distributed, and it can ensure that the tension and pore size will not change during the conversion from a circle to a plane, and will not affect the quality of the finished product. It can greatly improve the quality of medical parallel fiber grid filter.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for preparing a medical parallel fiber grid filter, comprising the following steps:

[0006] S1, spirally winding the filter fibers on the supporting rods of a circular winding disk in sequence, wherein a plurality of detachable temporary supporting rods are arranged on the winding disk along the circumference, and two supporting rods are also arranged at relative positions on the circumference and are detached radially outward;

[0007] S2. After the filter fiber is wound at least one layer, the tension support rod is connected to the end of the support rod;

[0008] S3, tensioning the tension support rod in a fixed tension mode, and taking out the temporary support rods in sequence;

[0009] S4, the tension rods stretch and tighten the support rods, and after all the temporary support rods are removed, the filter fibers are stretched into a plane;

[0010] S5, install the support rod;

[0011] The medical parallel fiber grid filter is prepared through the above steps.

[0012] In a preferred solution, there are two winding discs, which are arranged opposite to each other. The winding discs are provided with two opening grooves, which are used to accommodate the support rods. The opening grooves are located at the outer edge of the winding discs, are arranged opposite to each other in the radial direction, and the opening direction faces the outer wall of the winding discs.

[0013] The winding disc is also provided with a plurality of retreat grooves, which are oblong grooves and are roughly along the retreat direction of the filter fibers after being stretched out, and are used to accommodate temporary support rods.

[0014] In a preferred solution, the winding discs are respectively connected to a winding motor, and the two winding motors receive the same control signal for synchronously driving the two winding discs;

[0015] A yarn guide, a tensioner and a fiber reel are also provided on the upstream side of the winding drum.

[0016] In a preferred solution, each temporary supporting rod is connected to a spring so that the temporary supporting rod is supported toward the edge of the winding drum.

[0017] In a preferred solution, in step S3, a temporary limit block is further provided, and the temporary limit block is used to temporarily block the retreat groove to support the temporary support rod.

[0018] In the preferred scheme, in step S3, when taking out the temporary support rod, first remove the temporary limit block of the temporary support rod farthest from the support rod, so that the temporary support rod is supported by the spring, until the current temporary support rod retreats to other temporary support rods under the action of tension, and then remove the current temporary support rod.

[0019] In a preferred solution, in step S4, the temporary support rods are removed in sequence from the farthest position according to the distance from the support rods by the method of step S5.

[0020] In a preferred solution, the structure of the tension support rod is as follows: two sliding support rod heads are slidably connected to the two ends of the sliding sleeve, and a fork-shaped support head is provided at the free end of the sliding support rod head;

[0021] The sliding sleeve is provided with an axial sliding groove, and two sliding diagonal braces pass through the sliding groove and are respectively hinged to the sliding brace rod heads. The sliding diagonal braces are hinged through a support seat, the support seat is connected to a screw rod, the screw rod passes through the sliding groove and the sliding sleeve and is connected to a nut, the nut is connected to the output shaft of the through-core motor, the housing of the through-core motor is fixedly connected to the sliding sleeve, and the through-core motor is controlled with a constant torque.

[0022] In a preferred embodiment, in step S2, after winding a layer of filter fiber, glue is applied to the filter fiber at a position corresponding to the support rod, so that the filter fibers between the layers are bonded to each other;

[0023] The filter fibers are stacked and arranged in a staggered manner on the outer wall of the support rod;

[0024] The filter fibers are stacked in 2 to 5 layers;

[0025] In step S3, the tension struts open and tighten the support rods by controlling the preset tension;

[0026] In step S5, after the support rod is installed, the threaded sleeve is rotated to further expand the support rod, so that the tension support rod is unloaded, and then the tension support rod is removed;

[0027] The reinforcing fibers are bonded at intervals on the inner side and / or the outer side of the plane formed by the filter fibers in a bonding manner;

[0028] The antibacterial metal layer on the surface of the filter fiber is generated by coating, electroplating or vapor deposition.

[0029] A special tool for preparing a medical parallel fiber grid filter screen, wherein two winding discs are arranged opposite to each other, and two opening grooves are provided on the winding discs, and the opening grooves are used to accommodate support rods, and the opening grooves are located at the outer edge of the winding discs, and are arranged opposite to each other in a radial direction, and the opening direction faces the outer wall of the winding discs;

[0030] There are also a plurality of relief grooves provided on the winding disc. The relief grooves are oblong grooves, and the relief grooves generally extend along the relief direction after the filter fibers are expanded. The relief grooves are used to accommodate the temporary support rods;

[0031] Each temporary support rod is connected to a spring so that the temporary support rod is pushed towards the edge of the winding disc.

[0032] A preparation method and a special tooling for a medical parallel fiber grid-shaped filter screen provided by the present invention replace the existing mesh structure with a grid-shaped structure. By controlling the gap between the filter fibers, the filtration accuracy can be accurately controlled. That is, in the present application, filter fibers with a relatively thick diameter, such as filter fibers with a diameter of 0.035 mm, can also achieve a nano-level filtration pore diameter, and the pores are very uniform. Using filter fibers with a relatively thick diameter can also reduce the probability of hair filaments falling off the filter fibers. The grid-shaped structure can also reduce the wind resistance and increase the ratio of the filtration through-hole area to the overall planar area, which is convenient for miniaturizing the equipment. Compared with the filter screen with a disordered stacked fiber structure, it can significantly reduce the wind resistance, especially increase the ratio of the filtration through-hole area to the overall planar area, which is beneficial to the miniaturization of the equipment. The preparation method of the present invention can also significantly reduce the preparation difficulty of the filter screen with such a grid-shaped structure, accurately control the gap between the filter fibers, especially reduce the processing difficulty of setting the antibacterial coating. The special tooling provided by the present invention can improve the preparation efficiency and reduce the preparation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the drawings and embodiments:

[0034] Figure 1 It is a side view when preparing the grid-shaped filter screen by the preparation method of the present invention.

[0035] Figure 2 It is a side view schematic diagram of the winding disc of the present invention.

[0036] Figure 3 It is a front view of the filter screen prepared by the present invention.

[0037] Figure 4 It is a front view of the filter screen after being encapsulated by the present invention.

[0038] Figure 5 It is a schematic cross-sectional view of the support rod of the present invention.

[0039] Figure 6 is Figure 5 A-A cross-sectional view of.

[0040] Figure 7 It is a schematic structural diagram of the support rod of the present invention.

[0041] Figure 8 Structural schematic diagram of the tension strut of the present invention.

[0042] Figure 9 Schematic diagram of the winding device of the present invention.

[0043] Figure 10 Structural schematic diagram of the temporary limit block in the present invention.

[0044] Figure 11 Partial enlarged schematic diagram of the disordered stacked fiber structure filter screen in the prior art.

[0045] Figure 12 Partial enlarged schematic diagram of the mesh structure filter screen in the prior art.

[0046] In the figure: support rod 1, strut 2, filter fiber 3, reinforcing fiber 4, baffle 5, edge seal 6, limit thread groove 7, threaded sleeve 8, tension strut 9, sliding strut head 91, sliding sleeve 92, sliding diagonal brace 93, strut base 94, chute 95, through-hole motor 96, reducer 97, nut 98, screw rod 99, winding disc 10, relief groove 101, spring 102, flange 103, open slot 104, temporary support rod 11, temporary limit block 12, first winding motor 13, second winding motor 13', wire guide 14, wire guide motor 141, wire guide slider 142, wire guide screw rod 143, wire guide rail 144, tensioner 15, fiber reel 16. Detailed implementation manners

[0047] Example 1:

[0048] As Figure 1 、 9 in, a preparation method of a medical parallel fiber grid-shaped filter screen includes the following steps:

[0049] The material of the filter fiber 3 is glass fiber, stainless steel fiber, aluminum alloy fiber or plastic fiber;

[0050] An antibacterial metal layer is provided on the surface of the filter fiber 3, and the antibacterial metal layer includes one or a combination of more of silver, silver oxide, copper or copper oxide;

[0051] The antibacterial metal layer on the surface of the filter fiber 3 is formed by coating, electroplating or vapor deposition. Due to the grid-shaped structure, the arrangement of the surface antibacterial metal layer of the present invention is easier, because the grid-shaped structure is not easily blocked during the coating process.

[0052] The diameter of the filter fiber 3 is 0.01~0.1 mm;

[0053] S1. Wind the filter fiber 3 spirally around the support rods of the circular winding disc 10 in sequence. There are multiple detachable temporary support rods 11 arranged along the circumference of the winding disc 10, and there are also two support rods 1 that radially separate outward at opposite positions on the circumference.

[0054] The preferred solution is as Figure 2 , 9 In it, there are two winding discs 10, and the two winding discs 10 are arranged opposite to each other. There are two opening grooves 104 on the winding disc 10. The opening grooves 104 are used to accommodate the support rods 1. The opening grooves 104 are located at the outer edge of the winding disc 10, are arranged opposite to each other radially, and the opening directions face the outer wall of the winding disc 10.

[0055] There are also multiple relief grooves 101 on the winding disc 10. The relief grooves 101 are oblong grooves. The relief grooves 101 generally follow the relief direction after the filter fiber 3 is stretched. The relief grooves 101 are used to accommodate the temporary support rods 11.

[0056] As Figure 9 In it, the structure of the winding device is: there is also a wire guide 14, a tensioner 15 and a fiber reel 16 on the upstream side of the winding disc 10. The structure of the wire guide 14 is: the wire guide slider 142 is slidably connected to the wire guide rail 144. The wire guide slider 142 is provided with an internal thread. The wire guide slider 142 is also threadedly connected to the wire guide screw 143 through the internal thread. The wire guide screw 143 is connected to the wire guide motor 141 to drive the wire guide screw 143 to rotate. The wire guide motor 141 is a stepping motor or a servo motor. There is a wire guide groove on the wire guide slider 142. The wire guide slider 142 realizes the spiral winding of the filter fiber 3 on the support rods of the winding disc 10 through precise reciprocating motion.

[0057] The tensioner 15 adopts a hysteresis tensioner, a gravity tensioner or an electromagnetic tensioner.

[0058] In the preferred solution, there are multiple grooves on the outer wall of the support rod 1. The multiple grooves are arranged along the length direction of the support rod 1; the grooves are limit thread grooves 7 or annular grooves; the inner diameter of the inscribed circle of the grooves is the same as the diameter of the filter fiber 3. The size of the filter gap between the filter fibers 3 is controlled by the spacing between the grooves.

[0059] The preferred solution is as Figure 2 In it, each temporary support rod 11 is connected to a spring 102 to make the temporary support rod 11 push towards the edge of the winding disc 10. Preferably, the spring 102 adopts a gas spring.

[0060] The preferred solution is as Figure 9In it, the winding discs 10 are respectively connected to a winding motor, such as the first winding motor 13 and the second winding motor 13', and the two winding motors receive the same control signal for synchronously driving the two winding discs 10. Preferably, the two winding motors are also provided with braking devices. When the control signal stops, the braking ensures the synchronous rotation angles of the two winding discs 10. With this structure, it is convenient to remove the prepared finished filter mesh, further improving the processing efficiency.

[0061] S2. After the filter fiber 3 is wound for at least one layer, connect the tension support rod 9 to the end of the support rod 1.

[0062] In a preferred solution, the filter fibers 3 are arranged in a staggered and stacked manner on the outer wall of the support rod 1.

[0063] The filter fibers 3 are stacked in 2 to 5 layers; preferably 3 layers.

[0064] In a preferred solution, in step S2, after winding one layer of the filter fiber 3, glue is applied at the position corresponding to the support rod 1 on the filter fiber 3 so that the filter fibers 3 between the layers are bonded to each other.

[0065] On the inner side and / or the outer side of the plane formed by the filter fibers 3, the reinforcing fibers 4 are bonded at intervals to fix the distance between the filter fibers 3, that is, the size of the filtering gap.

[0066] S3. Tighten the tension support rod 9 in a constant-tension mode and sequentially remove the temporary support rods 11.

[0067] In step S3, the tension support rod 9 uses a control method with a preset tension value to expand and tighten the support rod 1.

[0068] A preferred solution is as Figure 1 、 8 In, the structure of the tension support rod 9 is: two sliding support rod heads 91 are slidably connected to both ends of the sliding sleeve 92, and a fork-shaped support head is provided at the free end of the sliding support rod head 91.

[0069] The sliding sleeve 92 is provided with an axial chute 95. Two sliding diagonal braces 93 pass through the chute 95 and are respectively hinged to the sliding support rod heads 91. The sliding diagonal braces 93 are hinged to each other through a support seat 94. The support seat 94 is connected to a screw rod 99. The screw rod 99 passes through the chute 95 and the sliding sleeve 92 and is connected to a nut 98. The nut 98 is connected to the output shaft of a through-hole motor 96. The housing of the through-hole motor 96 is fixedly connected to the sliding sleeve 92. The through-hole motor 96 is controlled by a constant torque to achieve a constant tension value, so that the tension of the filter fiber 3 remains consistent during the operation process.

[0070] In the preferred solutions such as 2 and 10, in step S3, a temporary limit block 12 is further provided. The temporary limit block 12 is used to temporarily block the retraction groove 101 to support the temporary support rod 11.

[0071] In the preferred solution such as Figure 1 In, in step S3, when removing the temporary support rod 11, first remove the temporary limit block 12 of the temporary support rod 11 that is farthest from the support rod 1, so that the temporary support rod 11 is supported by the spring 102. Until the current temporary support rod 11 retracts behind other temporary support rods 11 under the action of tension, then remove the current temporary support rod 11.

[0072] S4. The sliding support rod heads 91 at both ends of the tension support rod 9 push open and tension between the support rods 1. After all the temporary support rods 11 are removed, the filter fiber 3 is pushed open into a planar shape;

[0073] In the preferred solution, in step S4, according to the distance from the support rod 1, the temporary support rods 11 are sequentially removed from the farthest position by the method of step S5.

[0074] S5. Install the support rod 2; as Figure 7 In, the support rod 2 has a structure with adjustable length;

[0075] The support rod 2 is two screw rods, and the two screw rods are connected by a threaded sleeve. The thread directions at both ends of the threaded sleeve are opposite.

[0076] In step S5, after installing the support rod 2, rotate the threaded sleeve 8 to further push open the support rod 1. After the tension support rod 9 is unloaded, remove the tension support rod 9;

[0077] The medical parallel fiber grid-shaped filter screen is prepared through the above steps.

[0078] Example 2:

[0079] The tooling of the present invention can greatly improve the preparation efficiency and is also an equipment that can be sold independently. Such as Figure 2 , 7 ~9, a special tooling for preparing a medical parallel fiber grid-shaped filter screen, two winding disks 10 are arranged oppositely, and two opening grooves 104 are provided on the winding disk 10. The opening grooves 104 are used to accommodate the support rod 1. The opening grooves 104 are located at the outer edge of the winding disk 10 and are arranged oppositely along the radial direction, and the opening directions face the outer wall of the winding disk 10;

[0080] On the winding disk 10, a plurality of retraction grooves 101 are further provided. The retraction grooves 101 are oblong grooves, and the retraction grooves 101 generally follow the retraction direction after the filter fiber 3 is pushed open. The retraction grooves 101 are used to accommodate the temporary support rod 11;

[0081] Each temporary support rod 11 is connected to a spring 102 so that the temporary support rod 11 props against the edge of the winding disk 10.

[0082] The preferred solution is as Figure 8 shown, and further includes a tension support rod 9. The structure of the tension support rod 9 is as follows: two sliding support rod heads 91 are slidably connected to both ends of a sliding sleeve 92, and a fork-shaped support head is provided at the free end of the sliding support rod head 91;

[0083] A chute 95 is provided on the sliding sleeve 92 along the axial direction. Two sliding diagonal braces 93 pass through the chute 95 and are respectively hinged to the sliding support rod heads 91. The sliding diagonal braces 93 are hinged to each other through a support seat 94. The support seat 94 is connected to a screw rod 99. The screw rod 99 passes through the chute 95 and the sliding sleeve 92 and is connected to a nut 98. The nut 98 is connected to the output shaft of a through-hole motor 96. The housing of the through-hole motor 96 is fixedly connected to the sliding sleeve 92, and the through-hole motor 96 is controlled with a fixed torque;

[0084] The preferred solution is as Figure 10 shown, and further includes a temporary limit block 12. The temporary limit block 12 is used to temporarily block the yield groove 101 to support the temporary support rod 11.

[0085] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments and the features in the embodiments in this application can be arbitrarily combined with each other without conflict. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A preparation method of a medical parallel fiber grid-shaped filter screen, characterized in that The following steps are involved: S1, spirally winding the filter fiber (3) on the support rod (1) and the temporary support rod (11) of the circular winding disk (10) in sequence, wherein the winding disk (10) is provided with a plurality of detachable temporary support rods (11) along the circumference, and two support rods (1) are also provided at relative positions on the circumference and are detached radially outward; S2, after the filter fiber (3) is wound into at least one layer, the tension support rod (9) is connected to the end of the support rod (1); S3, tensioning the tension support rod (9) in a constant tension mode, and taking out the temporary support rods (11) in sequence; S4, the tension support rod (9) stretches and tightens the support rods (1), and after all the temporary support rods (11) are removed, the filter fibers (3) are stretched into a flat shape; S5, installing the support rod (2); The medical parallel fiber grid filter is prepared through the above steps.

2. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 1, characterized in that: There are two winding discs (10), the two winding discs (10) are arranged opposite to each other, two opening grooves (104) are provided on the winding disc (10), the opening grooves (104) are used to accommodate the support rod (1), the opening grooves (104) are located at the outer edge of the winding disc (10), are arranged opposite to each other in the radial direction, and the opening direction faces the outer wall of the winding disc (10); A plurality of retreat grooves (101) are also provided on the winding disk (10). The retreat grooves (101) are oblong grooves. The retreat grooves (101) are along the retreat direction of the filter fibers (3) after being stretched. The retreat grooves (101) are used to accommodate temporary support rods (11).

3. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 2, characterized in that: The winding discs (10) are respectively connected to a winding motor, and the two winding motors receive the same control signal for synchronously driving the two winding discs (10); A yarn guide (14), a tensioner (15) and a fiber reel (16) are also provided on the upstream side of the winding drum (10).

4. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 2, characterized in that: Each temporary support rod (11) is connected to a spring (102) so that the temporary support rod (11) is supported toward the edge of the winding drum (10).

5. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 4, characterized in that: in In step S3, a temporary limit block (12) is further provided, and the temporary limit block (12) is used to temporarily block the retreat groove (101) to support the temporary support rod (11).

6. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 4, characterized in that: at In step S3, when taking out the temporary support rod (11), first remove the temporary limit block (12) of the temporary support rod (11) farthest from the support rod (1), so that the temporary support rod (11) is supported by the spring (102), until the current temporary support rod (11) retreats to other temporary support rods (11) under the action of tension, and then remove the current temporary support rod (11).

7. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 6, characterized in that: In step S4, according to the distance from the support rod (1), the temporary support rods (11) are removed in sequence starting from the farthest position using the method of step S5.

8. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 1, characterized in that: The structure of the tension support rod (9) is as follows: two sliding support rod heads (91) are slidably connected to the two ends of the sliding sleeve (92), and a fork-shaped support head is provided at the free end of the sliding support rod head (91); The sliding sleeve (92) is provided with an axial chute (95). Two sliding struts (93) pass through the chute (95) and are respectively hinged to the sliding strut head (91). The sliding struts (93) are hinged to each other through a support seat (94). The support seat (94) is connected to a screw rod (99). The screw rod (99) passes through the chute (95) and the sliding sleeve (92) and is connected to a nut (98). The nut (98) is connected to the output shaft of a through-hole motor (96). The housing of the through-hole motor (96) is fixedly connected to the sliding sleeve (92). The through-hole motor (96) is controlled with a fixed torque.

9. The preparation method of a medical parallel fiber grid-shaped filter screen according to claim 1, characterized in that: at In step S2, after winding one layer of filter fiber (3), glue is applied at the position corresponding to the support rod (1) on the filter fiber (3) so that the filter fibers (3) between layers are bonded to each other. The filter fibers (3) are arranged in a staggered stack on the outer wall of the support rod (1). The filter fibers (3) are stacked in 2 to 5 layers. In step S3, the tension strut (9) uses a control method with a preset tension magnitude to expand and tension the support rod (1). In step S5, after installing the support rod (2), the threaded sleeve (8) is rotated to further expand the support rod (1). After the tension strut (9) is unloaded, the tension strut (9) is removed. Reinforcing fibers (4) are adhesively bonded at intervals on the inner side and / or the outer side of the plane formed by the filter fibers (3). The antibacterial metal layer on the surface of the filter fiber (3) is formed by coating, electroplating or vapor deposition.

10. A special tooling for preparing a medical parallel fiber grid-shaped filter net, characterized in that: Two winding disks (10) are arranged opposite to each other. The winding disks (10) are provided with two open slots (104). The open slots (104) are used to accommodate the support rod (1). The open slots (104) are located at the outer edge of the winding disks (10) and are arranged opposite to each other in the radial direction. The opening directions face the outer wall of the winding disks (10). The winding disks (10) are further provided with a plurality of relief slots (101). The relief slots (101) are oblong slots. The relief slots (101) are along the relief direction after the filter fiber (3) is expanded. The relief slots (101) are used to accommodate the temporary support rod (11). Each temporary support rod (11) is connected to a spring (102) so that the temporary support rod (11) prods towards the edge of the winding disk (10).

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