Adjustable honeycomb configuration preform extrusion die and its molding method and application

Abstract

The application discloses a kind of adjustable honeycomb configuration preform extrusion die and its moulding method and application, belong to extrusion die technical field.The mould includes upper die, lower die, upper die fixed plate, lower die fixed plate, die core, extrusion mechanism, unloading mechanism, guide mechanism, cushion block cushion block, backing plate, upper die holder, lower die holder;Lower die holder is sequentially provided with cushion block, backing plate and lower die fixed plate from bottom to top, and lower die is pressed into lower die fixed plate from top to bottom by interference fit, and lower die is provided with honeycomb configuration preform cavity, through hole and threaded hole connected with die core;Upper die is pressed into lower die fixed plate from top to bottom by interference fit, and upper die is provided with pressing plate groove and pressing rod through hole;Upper die is located above lower die, and is relatively arranged by guide mechanism;Unloading mechanism is arranged between two cushion blocks;Extrusion mechanism is located above upper die.The application can obtain honeycomb configuration preform of different sizes, improve the preparation efficiency of honeycomb configuration preform, and play a key role in the research of honeycomb configuration preform.

Description

Technical Field

[0001] This invention belongs to the field of extrusion die technology, specifically relating to an adjustable honeycomb preform extrusion die, its manufacturing method, and its application. Background Technology

[0002] The cutterhead ring of a tunnel boring machine (TBM) plays a crucial role in rock-breaking and tunneling operations. It is characterized by high wear, high cost, and frequent replacement. Improving the service life of the cutterhead ring through research on its performance can fundamentally solve these problems. Using honeycomb precast structures as the three-dimensional structural reinforcement for the cutterhead ring, it is particularly important to study the performance of honeycomb precast structures of different sizes and densities, select the most suitable experimental data for cutterhead ring fabrication, and then investigate the wear resistance of the cutterhead ring. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention proposes an adjustable honeycomb preform extrusion mold, its molding method, and its application.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an adjustable honeycomb preform extrusion mold includes: an upper mold 6, a lower mold 9, a mold core 22, an upper mold fixing plate 8, a lower mold fixing plate 10, an extrusion mechanism, an unloading mechanism, a guiding mechanism, a pad block 12, a pad plate 11, an upper mold base 1, and a lower mold base 15;

[0005] The mold core 22 is fixed on the lower mold 9; two pads 12 are provided on the lower mold base 15; a material unloading mechanism is provided between the two pads 12; the lower mold base 15, pads 12, pads 11, and lower mold fixing plate 10 are connected from bottom to top; the lower mold 9 is provided with a honeycomb preform cavity 901 and a material unloading rod through hole 902 and a threaded hole 903 for fixing the mold core located in the honeycomb preform cavity 901, and is pressed into the lower mold fixing plate 10 from top to bottom through interference fit;

[0006] The upper die 6 is located above the lower die 9 and is positioned relative to it through a guide mechanism; the upper die 6 is pressed into the upper die fixing plate 8 from top to bottom through an interference fit; the extrusion mechanism is located above the upper die 6; the upper die base 1 is fixedly connected to the extrusion mechanism.

[0007] In a preferred embodiment of the present invention, the extrusion mechanism includes, from top to bottom, a die shank 26, a die shank guide sleeve 2, a push plate 24, a push plate guide 4, a push rod 5, and an extrusion plate 7; the push plate guide 4 is fixedly connected to the upper die base 1, the die shank guide sleeve 2 is interference-fitted with the through hole provided in the upper die base 1 to fix the die shank guide sleeve 2, the die shank 26 passes through the die shank guide sleeve 2 and is connected to the push plate 24, the groove 401 provided on the push plate guide 4 is provided with a push rod through hole 402 that is clearance-fitted with the push rod 5, the push plate 24 moves up and down in the groove provided in the push plate guide 4; the push plate 24 is connected to the push rod 5, and the push rod 5 passes through the through hole 402, the upper die 6 and the extrusion plate 7 in sequence and is fixedly connected.

[0008] The die handle 26 is connected to the push plate 24, which drives the extrusion mechanism to move up and down in the groove provided in the push plate guide plate 4.

[0009] In a preferred embodiment of the present invention, the push plate guide plate 4 and the upper mold base 1 are fixedly connected by hexagonal head screws 25.

[0010] In a preferred embodiment of the present invention, the unloading mechanism includes an unloading plate 14, an unloading rod fixing plate 21, a guide rod sleeve 20, an unloading rod 13, and a guide rod 19. The unloading plate 14 is connected to the unloading rod fixing plate 21, the guide rod sleeve 20 is fixed between the unloading plate 14 and the unloading rod fixing plate 21, and the guide rod 19 passes through the guide rod sleeve 20 and the through holes on the unloading plate 14 in sequence and is fixed on the lower mold base 15. The unloading rod 13 is interference-fitted with the stepped hole on the unloading rod fixing plate 21 and passes through the pad plate 11, the lower mold fixing plate 10, and the unloading rod through hole 902 provided on the lower mold, respectively.

[0011] In a preferred embodiment of the present invention, the guiding mechanism includes a guide post 18 and a guide sleeve 3. The guide post 18 is fixedly connected to the lower mold base 15 by an interference fit, and the guide sleeve 3 is fixedly connected to the upper mold base 1 by an interference fit, thereby guiding the mold opening and closing movements.

[0012] In a preferred embodiment of the present invention, the mold core 22 is fixed to the lower mold 9 through the threaded hole 903 provided in the lower mold cavity. The upper mold 6 and the lower mold 9 are closed. Under the action of the extrusion mechanism, the extrusion plate 7 moves downward to a certain position to form the honeycomb structure preform with the mold core 22. The density of the honeycomb structure preform is adjusted by the distance that the extrusion plate 7 moves downward in the honeycomb structure preform cavity 901.

[0013] As a preferred embodiment of the present invention, the number of mold cores 22 is six, depending on actual needs.

[0014] As a preferred embodiment of the present invention, the lower mold base 15 has a central through hole and four U-shaped grooves, which are located at the four corners of the lower mold base 15.

[0015] In a preferred embodiment of the present invention, the unloading rod 13 is clearance-fitted with the through hole 902 of the lower mold.

[0016] As a preferred embodiment of the present invention, the upper mold 6 and the lower mold 9 are designed as an integral embedded cavity, which is easy to disassemble. By changing the size of the upper mold 6, the lower mold 9, the mold core 22 and the extrusion plate 7, honeycomb preforms of different sizes can be obtained.

[0017] As a preferred embodiment of the present invention, the upper mold 6 is provided with a pressure plate groove 601 and a pressure rod through hole 602, and the push rod 5 passes through the through hole 402 and the pressure rod through hole 602 in sequence to be connected and fixed to the extrusion plate 7.

[0018] A method for manufacturing an adjustable honeycomb preform extrusion die includes the following steps:

[0019] (2) Before extrusion, first fix the lower die part: invert the lower die 9, and align the upper and lower die fixing plates 10, pads 11 and pads 12 in sequence; then pass the unloading rod 13 through the unloading rod fixing plate 21 and fix it; then fix the guide rod sleeve 20 on the unloading rod fixing plate 21; then fix the unloading rod fixing plate 21 and the unloading plate 14 through the guide rod 19 through the guide rod sleeve 20; then align the unloading mechanism composed of the unloading rod 13, the unloading rod fixing plate 21 and the unloading plate 14 through the unloading rod 13 through the pad 11. Through hole; then connect and fix the guide rod 19 to the lower mold base 15, invert the lower mold base 15 so that the guide rod 19 on the lower mold base 15 is aligned with the stripper plate 14; then fix the lower mold base 15, pad block 12, pad plate 11 and lower mold fixing plate 10 together, and then flip it over; then fix the guide post 18 to the lower mold base 15; then fix the six mold cores 22 together with the lower mold 9; then fix the lower mold 9 to the lower mold fixing plate 10 to form a complete lower mold part, and place the assembled lower mold part on the worktable;

[0020] Step 2: After assembling the lower mold, fix the upper mold 6 to the upper mold fixing plate 8; then fix the extrusion plate 7 to the push rod 5; fix the push plate guide plate 4 to the upper mold fixing plate 8; then place the push plate 24 in the push plate guide plate groove 401, and the push rod 5 passes through the upper mold 6 and the push plate guide plate 4 from bottom to top, and is fixedly connected to the push plate 24; then connect and fix the mold shank guide sleeve 2 and the guide post guide sleeve 3 to the upper mold base 1; fix the mold shank 26 through the mold shank guide sleeve 2 on the upper mold base to the push plate 24, and fix the upper mold base 1 to the push plate guide plate 4. Align the guide post guide sleeve 3 on the upper mold base with the guide post 18 on the lower mold base to close the upper mold and lower mold, forming a complete adjustable honeycomb preform extrusion mold; then place the mold on the hydraulic press worktable, and adjust the mold according to the fixed connection between the mold shank 26 and the press, and the fit between the hydraulic press push rod and the center through hole of the lower mold base.

[0021] Step 3: Adjust the position of the mold, raise the upper mold part to a certain height using the press to separate the upper mold part from the lower mold part, then fill the cavity of the honeycomb preform with material, then close the mold, control the hydraulic press to press downward, and control the compactness of the honeycomb preform by the distance the extrusion plate moves downward.

[0022] Step 4: After the extrusion plate has finished extruding, allow the mold to cool naturally. Once the mold has cooled and solidified, open the mold using a hydraulic press.

[0023] Step 5: During unloading, the hydraulic press pushes the unloading plate 14 and the unloading rod fixing plate 21 upward by pushing the cylinder ejector rod. The unloading rod fixing plate 21 drives the unloading rod 13 to push the mold upward, thus completing the mold manufacturing.

[0024] The present invention also claims protection for the application of the adjustable honeycomb preform extrusion die in the preparation of honeycomb preforms.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: Compared with the existing method of preparing honeycomb preforms by pouring a mixture of WC particles and water glass into a silicone mold, the present invention connects the mold handle to the press, the mold handle drives the push plate to move, the push plate is connected to one end of the push rod, and the other end of the push rod is connected to the extrusion plate. The thickness of the honeycomb preform is controlled by the distance the extrusion plate moves downward through the press, thereby obtaining finished parts with different densities. In addition, the present invention can obtain honeycomb preforms with different densities and different sizes without changing the extrusion mold, saving mold manufacturing costs and processing time, and improving mold making efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the upper mold of the present invention.

[0027] Figure 2 This is a bottom view of the upper mold structure of the present invention.

[0028] Figure 3 for Figure 2 A cross-sectional view along line AA.

[0029] Figure 4 This is a schematic diagram of the mold core structure of the present invention.

[0030] Figure 5 This is a schematic diagram of the lower mold of the present invention.

[0031] Figure 6 This is a top view of the lower mold structure of the present invention.

[0032] Figure 7 is Figure 6 A cross-sectional view along line BB.

[0033] Figure 8 is a schematic diagram of the extrusion plate of the present invention.

[0034] Figure 9 is a schematic diagram of the push rod guide plate of the present invention.

[0035] Figure 10 is a schematic diagram of the structure of the adjustable honeycomb preform extrusion die of the present invention.

[0036] Figure 11 is a front view of the adjustable honeycomb preform extrusion die of the present invention.

[0037] Figure 12 is a top view of the adjustable honeycomb preform extrusion die of the present invention.

[0038] Figure 13 is Figure 12 A sectional view along line CC.

[0039] Figure 14 is Figure 11 Sectional view along line DD.

[0040] Figure 15 is an exploded view of the adjustable honeycomb preform extrusion die structure of the present invention.

[0041] Figure 16 is a schematic diagram of the honeycomb preform of the present invention.

[0042] Explanation of reference numerals in the attached drawings: 1-Upper mold base, 2-Mold shank guide sleeve, 3-Guide post guide sleeve, 4-Push plate guide plate, 5-Push rod, 6-Upper mold, 7-Extrusion plate, 8-Upper mold fixing plate, 9-Lower mold, 10-Lower mold fixing plate, 11-Push plate, 12-Push block, 13-Ejector rod, 14-Ejector plate, 15-Lower mold base, 16-Hex socket head cap screw I, 17-Ordinary hex screw, 18-Guide post, 19- - Guide rod, 20 - Guide rod sleeve, 21 - Unloading rod fixing plate, 22 - Mold core, 23 - Socket head cap screw II, 24 - Push plate, 25 - Socket head cap screw III, 26 - Mold handle, 901 - Honeycomb structure precast cavity, 902 - Unloading rod through hole, 903 - Fixed mold core threaded hole, 601 - Pressure plate groove, 602 - Pressure plate through hole, 401 - Groove, 402 - Push rod through hole. Detailed Implementation

[0043] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0044] Example 1

[0045] like Figure 1-16 As shown, an adjustable honeycomb preform extrusion die includes: an upper die 6, a lower die 9, a die core 22, an upper die fixing plate 8, a lower die fixing plate 10, an extrusion mechanism, an unloading mechanism, a guiding mechanism, a pad block 12, a pad plate 11, an upper die base 1, and a lower die base 15.

[0046] The mold core 22 is fixed on the lower mold 9; two pads 12 are provided on the lower mold base 15; a material unloading mechanism is provided between the two pads 12; a pad plate 11 is provided on the pad 12, and a lower mold fixing plate 10 is provided on the pad plate 11. The lower mold 9 is pressed into the lower mold fixing plate 10 from top to bottom by interference fit. The lower mold base 15, pads 12, pad plate 11, and lower mold fixing plate 10 are connected from bottom to top; the lower mold 9 is provided with a honeycomb preform cavity 901 and a material unloading rod through hole 902 and a threaded hole 903 for fixing the mold core located in the honeycomb preform cavity 901.

[0047] The upper mold 6 and lower mold 9 mainly serve as supports and are used for opening and closing the mold when removing the molded part. Since the lower mold 9 and the lower mold fixing plate 10 are not integral, the lower mold 9 is subjected to downward pressure during extrusion. The pad plate 11 provides some support and also reduces the wear of the lower mold 9.

[0048] The extrusion mechanism includes, from top to bottom, a die shank 26, a die shank guide sleeve 2, a push plate 24, a push plate guide 4, a push rod 5, and an extrusion plate 7. The push plate guide 4 is fixedly connected to the upper die base 1 by a hexagonal head screw III 25. The upper die base 1 has a through hole for fixing the die shank guide sleeve 2. The die shank guide sleeve 2 is interference-fitted with the through hole of the upper die base 1. The die shank 26 passes through the die shank guide sleeve 2 and is connected to the push plate 24. The groove 401 on the push plate guide 4 has a push rod through hole 402 that is clearance-fitted with the push rod 5. The push plate 24 moves up and down in the groove on the push plate guide 4. The push plate 24 is connected to the push rod 5. The push rod 5 passes through the through hole 402, the upper die 6, and is connected and fixed to the extrusion plate 7 in sequence.

[0049] The upper die 6 is located above the lower die 9 and is positioned relative to it via a guide mechanism. The upper die 6 is pressed into the upper die fixing plate 8 from top to bottom via an interference fit. The extrusion mechanism is located above the upper die 6, and the upper die base 1 is fixedly connected to the extrusion mechanism. The upper die 6 is provided with a pressure plate groove 601 and a pressure rod through hole 602. The pressure rod through hole 602 is located in the pressure plate groove 601, and the push rod 5 passes through the through hole 402 and the pressure rod through hole 602 in sequence to be connected and fixed to the extrusion plate 7.

[0050] The lower mold base 15, the pad block 12, the backing plate 11, and the lower mold fixing plate 10 are connected and fixed together by the internal hex socket head cap screw I16.

[0051] The socket head cap screw II23 connects and fixes the push plate guide plate 4 and the upper mold fixing plate 8 together.

[0052] The unloading mechanism includes an unloading plate 14, an unloading rod fixing plate 21, a guide rod sleeve 20, an unloading rod 13, and a guide rod 19. The unloading plate 14 is connected and fixed to the unloading rod fixing plate 21 by hexagonal screws 17, and its main function is to fix the unloading rod 13 axially. The unloading plate 14 is located below the unloading rod fixing plate 21. The guide rod sleeve 20 is fixed between the unloading plate 14 and the unloading rod fixing plate 21. The guide rod 19 passes through the guide rod sleeve 20 and the through hole on the unloading plate 14 in sequence and is fixed on the lower mold base 15, which guides the unloading mechanism located at the lower end to move up and down between the two pads 12. The unloading rod 13 is interference-fitted with the stepped hole on the unloading rod fixing plate 21 and passes through the pad 11, the lower mold fixing plate 10, and the unloading rod through hole 902 provided on the lower mold. The unloading rod 13 and the unloading rod fixing plate 21 are axially fixed in one direction through the stepped hole. Then, the unloading plate 14 is connected and fixed to the unloading rod fixing plate 21 with ordinary hexagonal screws 17, so as to achieve axial fixation of the unloading rod 13 in two directions.

[0053] The unloading rod 13 is a stepped unloading rod at one end, requiring the cooperation of the unloading plate 14 and the unloading rod fixing plate 21 to achieve complete fixation of the unloading rod 13. This avoids the problem when directly using the unloading plate 14 for unloading, where the unloading plate 14 not only needs to have blind holes for fixing the unloading rod and through holes for the guide rod, but also has to be subjected to the thrust of the press, making the unloading plate 14 prone to deformation and reducing its service life.

[0054] The guiding mechanism includes a guide post 18 and a guide sleeve 3. The guide post 18 is fixedly connected to the lower mold base 15 by an interference fit, and the guide sleeve 3 is fixedly connected to the upper mold base 1 by an interference fit. The guide post 18 and the guide sleeve 3 work together to guide the mold opening and closing movements.

[0055] Six mold cores 22 are fixed to the lower mold 9 through threaded holes 903 in the lower mold cavity. The upper mold 6 and the lower mold 9 are closed. Under the action of the extrusion mechanism, the extrusion plate 7 moves downward to a certain position to form the honeycomb preform with the mold cores 22. The density of the honeycomb preform is adjusted by the distance the extrusion plate 7 moves downward in the honeycomb preform cavity 901. As a detachable movable mold core 22, it is convenient to process, saves production costs during mold manufacturing, and can be replaced in time when the mold core is worn.

[0056] The mold core 22 is designed as a regular hexagonal prism, which is in clearance fit with the regular hexagonal hole on the extrusion plate 7; the number of mold cores 22 is set as needed, and the number of mold cores 22 is the same as the number of regular hexagonal holes on the extrusion plate 7; the extrusion plate 7, the pressure plate groove 601 of the upper mold, and the honeycomb preform cavity 901 of the lower mold are all in clearance fit.

[0057] As a preferred embodiment of the present invention, the lower die base 15 has a central through hole and four U-shaped grooves, which are located at the four corners of the lower die base 15, for fixing the extrusion die on the hydraulic press.

[0058] The upper mold 6 and lower mold 9 are designed as an integral embedded cavity, which is easy to disassemble. By changing the size of the upper mold 6, lower mold 9, mold core 22 and extrusion plate 7, honeycomb preforms of different sizes can be obtained. When the cavity wears out, only the molding parts need to be replaced, which reduces costs to a certain extent.

[0059] Example 2

[0060] The method for molding using the adjustable honeycomb preform extrusion die of Example 1 includes the following steps:

[0061] Step 1: Before extrusion, first fix the lower die part: Invert the lower die 9, and align the upper and lower die fixing plates 10, pads 11, and pad blocks 12 in sequence; then pass the unloading rod 13 through the unloading rod fixing plate 21 and fix it; then fix the guide rod sleeve 20 on the unloading rod fixing plate 21; then fix the unloading rod fixing plate 21 and the unloading plate 14 by passing the guide rod 19 through the guide rod sleeve 20; then align the unloading mechanism composed of the unloading rod 13, the unloading rod fixing plate 21, and the unloading plate 14 through the unloading rod 13 passing through the pad 11. Through hole; then connect and fix the guide rod 19 to the lower mold base 15, invert the lower mold base 15 so that the guide rod 19 on the lower mold base 15 is aligned with the stripper plate 14; then fix the lower mold base 15, pad block 12, pad plate 11 and lower mold fixing plate 10 together, and then flip it over; then fix the guide post 18 to the lower mold base 15; then fix the six mold cores 22 together with the lower mold 9; then fix the lower mold 9 to the lower mold fixing plate 10 to form a complete lower mold part, and place the assembled lower mold part on the worktable.

[0062] Step 2: After assembling the lower mold, fix the upper mold 6 to the upper mold fixing plate 8; then fix the extrusion plate 7 to the push rod 5; fix the push plate guide plate 4 to the upper mold fixing plate 8; then place the push plate 24 in the push plate guide plate groove 401, and the push rod 5 passes through the upper mold 6 and the push plate guide plate 4 from bottom to top, and is fixedly connected to the push plate 24; then connect and fix the mold shank guide sleeve 2 and the guide post guide sleeve 3 to the upper mold base 1; fix the mold shank 26 through the mold shank guide sleeve 2 on the upper mold base to the push plate 24, and fix the upper mold base 1 to the push plate guide plate 4. Align the guide post guide sleeve 3 on the upper mold base with the guide post 18 on the lower mold base to close the upper mold and lower mold, forming a complete adjustable honeycomb preform extrusion mold; then place the mold on the hydraulic press worktable, and adjust the mold according to the fixed connection between the mold shank 26 and the press, and the fit between the hydraulic press push rod and the center through hole of the lower mold base.

[0063] Step 3: Adjust the position of the mold, raise the upper mold part to a certain height using a press to separate the upper mold part from the lower mold part, then fill the cavity of the honeycomb preform with the mixture of WC ceramic particles and water glass, then close the mold, control the hydraulic press to press downward, and control the compactness of the honeycomb preform by the distance the extrusion plate moves downward.

[0064] Step 4: After the extrusion plate has finished extruding, allow the mold to cool naturally. Once the mold has cooled and set, open the mold using a hydraulic press.

[0065] Step 5: During unloading, the hydraulic press pushes the unloading plate 14 and the unloading rod fixing plate 21 upward by pushing the cylinder ejector rod. The unloading rod fixing plate 21 drives the unloading rod 13 to push the mold upward, thus completing the mold manufacturing.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An adjustable honeycomb preform extrusion die, characterized in that, include: Includes upper mold (6), lower mold (9), mold core (22), upper mold fixing plate (8), lower mold fixing plate (10), extrusion mechanism, unloading mechanism, guiding mechanism, pad block (12), pad plate (11), upper mold base (1), and lower mold base (15); The mold core (22) is fixed on the lower mold (9); two pads (12) are provided on the lower mold base (15); a material unloading mechanism is provided between the two pads (12); the lower mold base (15), pads (12), pad plate (11), and lower mold fixing plate (10) are connected from bottom to top; the lower mold (9) is provided with a honeycomb preform cavity (901) and a material unloading rod through hole (902) and a threaded hole (903) for fixing the mold core located in the honeycomb preform cavity (901), which are pressed into the lower mold fixing plate (10) from top to bottom through interference fit; The upper die (6) is located above the lower die (9) and is positioned relative to it through a guide mechanism; the upper die (6) is pressed into the upper die fixing plate (8) from top to bottom through an interference fit; the extrusion mechanism is located above the upper die (6); the upper die base (1) is fixedly connected to the extrusion mechanism; The extrusion mechanism includes, from top to bottom, a die handle (26), a die handle guide sleeve (2), a push plate (24), a push plate guide plate (4), a push rod (5), and an extrusion plate (7); the push plate guide plate (4) is fixedly connected to the upper die base (1), the die handle guide sleeve (2) is interference-fitted with the through hole provided on the upper die base (1) to fix the die handle guide sleeve (2), the die handle (26) passes through the die handle guide sleeve (2) and is connected to the push plate (24), the groove (401) provided on the push plate guide plate (4) is provided with a push rod through hole (402) that is clearance-fitted with the push rod (5), the push plate (24) moves up and down in the groove provided on the push plate guide plate (4); the push plate (24) is connected to the push rod (5), the push rod (5) passes through the through hole (402) and the upper die (6) in sequence and is connected and fixed to the extrusion plate (7); The mold core (22) is fixed on the lower mold (9) through the threaded hole (903) in the lower mold cavity. The upper mold (6) and the lower mold (9) are closed. Under the action of the extrusion mechanism, the extrusion plate (7) moves downward to a certain position and forms a honeycomb preform with the mold core (22). The density of the honeycomb preform is adjusted by the distance that the extrusion plate (7) moves downward in the honeycomb preform cavity (901).

2. The adjustable honeycomb preform extrusion die as described in claim 1, characterized in that, The unloading mechanism includes an unloading plate (14), an unloading rod fixing plate (21), a guide rod sleeve (20), an unloading rod (13), and a guide rod (19). The unloading plate (14) is connected to the unloading rod fixing plate (21) located below it. The guide rod sleeve (20) is fixed between the unloading plate (14) and the unloading rod fixing plate (21). The guide rod (19) passes through the guide rod sleeve (20) and the through hole on the unloading plate (14) in sequence and is fixed on the lower mold base (15). The unloading rod (13) is interference-fitted with the stepped hole on the unloading rod fixing plate (21) and passes through the pad plate (11), the lower mold fixing plate (10), and the unloading rod through hole (902) provided on the lower mold, respectively.

3. The adjustable honeycomb preform extrusion die as described in claim 1, characterized in that, The guiding mechanism includes a guide post (18) and a guide sleeve (3). The guide post (18) is fixedly connected to the lower mold base (15) by an interference fit, and the guide sleeve (3) is fixedly connected to the upper mold base (1) by an interference fit, which guides the mold opening and closing movements.

4. The adjustable honeycomb preform extrusion die as described in claim 1, characterized in that, The lower mold base (15) has a central through hole and four U-shaped grooves, which are located at the four corners of the lower mold base (15).

5. The adjustable honeycomb preform extrusion die as described in claim 1, characterized in that, The upper mold (6) and lower mold (9) are designed as an integral embedded cavity, which is easy to disassemble. By changing the size of the upper mold (6), lower mold (9), mold core (22) and extrusion plate (7), honeycomb structure preforms of different sizes can be obtained.

6. The adjustable honeycomb preform extrusion die as described in claim 2, characterized in that, The upper mold (6) is provided with a pressure plate groove (601) and a pressure rod through hole (602). The push rod (5) passes through the through hole (402) and the pressure rod through hole (602) in sequence and is connected and fixed to the extrusion plate (7).

7. The application of the adjustable honeycomb preform extrusion die according to any one of claims 1-6 in the preparation of honeycomb preforms.

8. A method for making an adjustable honeycomb preform extrusion die, comprising the following steps: (1) Before extrusion, fix the lower die part: invert the lower die (9), and align the upper and lower die fixing plates (10), pads (11), and pad blocks (12) in sequence; then pass the unloading rod (13) through the unloading rod fixing plate (21) and fix it; then fix the guide rod sleeve (20) on the unloading rod fixing plate (21); then fix the unloading rod fixing plate (21) and unloading plate (14) by passing the guide rod (19) through the guide rod sleeve (20); then fix the unloading mechanism composed of the unloading rod (13), unloading rod fixing plate (21), and unloading plate (14) by aligning the unloading rod (13) through the pad (11). The through hole; then connect and fix the guide rod (19) to the lower mold base (15), invert the lower mold base (15) so that the guide rod (19) on the lower mold base (15) is aligned with the stripper plate (14); then fix the lower mold base (15), pad (12), pad plate (11) and lower mold fixing plate (10) together as a whole, and then flip it over; then fix the guide post (18) to the lower mold base (15); then fix the six mold cores (22) to the lower mold (9) together; then fix the lower mold (9) to the lower mold fixing plate (10) to form a complete lower mold part, and place the assembled lower mold part on the worktable; Step 2: After assembling the lower mold, fix the upper mold (6) to the upper mold fixing plate (8); then fix the extrusion plate (7) to the push rod (5); fix the push plate guide plate (4) to the upper mold fixing plate (8); then place the push plate (24) in the push plate guide plate groove (401), and the push rod (5) passes through the upper mold (6) and the push plate guide plate (4) from bottom to top, and is fixedly connected to the push plate (24); then connect and fix the mold shank guide sleeve (2) and the guide post guide sleeve (3) to the upper mold base (1); The mold shank (26) passes through the mold shank guide sleeve (2) on the upper mold base and is fixedly connected to the push plate (24). The upper mold base (1) is fixedly connected to the push plate guide plate (4). According to the alignment of the guide post guide sleeve (3) on the upper mold base and the guide post (18) on the lower mold base, the upper mold part and the lower mold part are closed to form a complete adjustable honeycomb structure preform extrusion mold. Then the mold is placed on the hydraulic press workbench, and the mold is adjusted according to the fixed connection between the mold shank (26) and the press, the cooperation between the hydraulic press push rod and the central through hole of the lower mold base. Step 3: Adjust the position of the mold, raise the upper mold part to a certain height using the press to separate the upper mold part from the lower mold part, then fill the cavity of the honeycomb preform with material, then close the mold, control the hydraulic press to press downward, and control the compactness of the honeycomb preform by the distance the extrusion plate moves downward. Step 4: After the extrusion plate has finished extruding, allow the mold to cool naturally. Once the mold has cooled and solidified, open the mold using a hydraulic press. Step 5: During unloading, the hydraulic press pushes the unloading plate (14) and the unloading rod fixing plate (21) upward by pushing the cylinder ejector rod. The unloading rod fixing plate (21) drives the unloading rod (13) to push the mold upward, thus completing the mold manufacturing.

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