Device for manufacturing rock core in axial compression mode and method for manufacturing indoor rock core in axial compression mode

Abstract

The invention provides a device for manufacturing a rock core in an axial compression mode and a method for manufacturing an indoor rock core in an axial compression mode, the device for manufacturing the rock core in the axial compression mode is characterized in that a frame assembly is provided with a containing space and at least two pushing holes, and the two pushing holes are coaxially formed in the two opposite sides of the containing space; the mold assembly is detachably arranged in the containing space, the mold assembly is provided with a pressing deformation groove, and the pressing deformation groove is filled with a rock core raw material; the pressing oil cylinder is arranged on the frame assembly and located in the containing space, at least one part of the pressing oil cylinder abuts against the mold assembly, and the volume of the pressing deformation groove is changed in the stretching and retracting process of the pressing oil cylinder so that the rock core raw materials can be pressed into rock cores; the coring device is arranged on the frame assembly, at least one part of the coring device is telescopically arranged in one pushing hole, and the coring device can stretch into the pressing deformation groove and push the rock core out of the other pushing hole. The problems that in the prior art, an artificial rock core is large in manufacturing difficulty and high in manufacturing cost are solved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum drilling experimental equipment, in particular to an axial pressure core making device and an axial pressure core making method for indoor rock cores. Background Art

[0002] Core physical simulation experiment is the basic theory of oil and gas reservoir evaluation and development. A large number of cores are needed for repetitive experiments in physical simulation. However, due to the difficulty of coring formations, small quantity, high cost and limited specifications, it is difficult to meet the needs of experimental research. Therefore, it is necessary to find a model that can replace reservoir cores.

[0003] Artificial cores are usually used for simulation experiments in China. The control of the pore structure and manufacturing size of artificial cores is very important. At present, the main artificial core manufacturing processes in China generally have problems such as single structure and function, and difficulty in controlling the porosity of the manufactured cores.

[0004] Patent No. CN205665078U discloses an artificial core production mold and its mold flaps, which include at least two mold flaps arranged separately, adjacent mold flaps are connected to form an axis to extend the mold cavity in the up-down direction, and the cross section of each mold flap is a C-shaped structure. A first positioning structure is provided on the butt end face of one of the two mold flaps connected to each other, and a second positioning structure for concave-convex positioning matching with the first positioning structure is provided on the corresponding butt end face of the other mold flap. The first positioning structure and the second positioning structure that match each other in concave-convex manner ensure the position accuracy of the two mold flaps in the radial direction of the mold cavity when the two adjacent mold flaps are connected to each other. The cross section of each mold flap is a C-shaped structure, and the positioning structure is provided on the butt end face, so the positioning structure is located between the inner and outer peripheral surfaces of the mold flap, and the outward protruding connection ears are omitted on each mold flap. The structure is complex, the operation is cumbersome, the function is single, and only a single specification of core can be produced. If multiple specifications of cores are required, multiple specifications of artificial core production molds and mold flaps are required, and the production cost is extremely high.

[0005] That is to say, the artificial core in the prior art has the problems of great difficulty and high production cost. Summary of the invention

[0006] The main purpose of the present invention is to provide an axial pressure core making device and an axial pressure indoor core making method to solve the problems of great difficulty and high cost in making artificial cores in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an axial compression type core making device, comprising: a frame assembly, the frame assembly having a receiving space and at least two pushing holes connected to the receiving space, the two pushing holes being coaxially arranged on opposite sides of the receiving space; a mold assembly, the mold assembly being detachably arranged in the receiving space, the mold assembly having a pressing deformation groove, the pressing deformation groove being filled with core material; a pressing cylinder, the pressing cylinder being arranged on the frame assembly and located in the receiving space, at least a part of the pressing cylinder being in contact with the mold assembly, and the volume of the pressing deformation groove being changed during the extension and retraction of the pressing cylinder to press the core material into a core; a coring device, the coring device being arranged on the frame assembly and at least a part of the coring device being telescopically arranged in a pushing hole, the coring device being able to extend into the pressing deformation groove and push the core out through another pushing hole.

[0008] Furthermore, the frame assembly includes: a frame body, which has a central through hole on one side surface of the frame body, and the frame body also has at least two connecting holes connected to the central through hole; a supporting frame, which is arranged in the central through hole, and the supporting frame is arranged in close contact with the inner wall surface of the central through hole, and the supporting frame has a accommodating space and at least two connecting holes connected to the accommodating space, and the connecting hole and the connecting hole are coaxial to form a pushing hole.

[0009] Furthermore, the support frame includes: a mold mounting plate, which is arranged at the top of the central through hole, and the mold assembly is connected to the mold mounting plate; a cylinder mounting plate, which is arranged at the bottom of the central through hole, and the pressing cylinder is connected to the cylinder mounting plate; two side support plates, which are arranged at intervals, and the two ends of the side support plates are respectively connected to the mold mounting plate and the cylinder mounting plate to enclose a receiving space, and the side support plates have a connecting hole.

[0010] Furthermore, the mold assembly includes: a fixed mold, which is connected to the frame assembly, and the fixed mold has a receiving groove on the side facing the pressing cylinder, and the receiving groove runs through two opposite side surfaces of the fixed mold; a movable mold, which is movably arranged in the receiving groove, and the movable mold has a missing groove on the side facing the bottom surface of the receiving groove, and the missing groove and the receiving groove form a pressing deformation groove, and the pressing cylinder abuts against the movable mold to push the movable mold to move in the receiving groove, thereby changing the distance between the missing groove and the bottom surface of the receiving groove, and thereby pressing the core raw material into a core.

[0011] Furthermore, the mold assembly includes at least one bushing, which is detachably arranged in the pressing deformation groove, and the core material is arranged in the bushing. The pressing cylinder pushes the movable mold to push the bushing and then press the core material into a core.

[0012] Furthermore, there are multiple bushings, and the diameters of the multiple bushings are different.

[0013] Further, the diameter of the bushing is smaller than the diameter of the pushing hole.

[0014] Furthermore, the mold assembly also includes multiple adjusting bolts, and the surface of the fixed mold facing the pressing cylinder has multiple adjusting holes. The multiple adjusting bolts are arranged corresponding to the multiple adjusting holes, and at least a portion of the adjusting bolts is located on the inner side of the side wall of the accommodating groove to limit the movable mold.

[0015] Furthermore, the fixed mold also has at least two connecting protrusions, and the connecting protrusions extend outward from two side surfaces penetrated by the accommodating groove.

[0016] Furthermore, the axial pressure core making device also includes at least two baffles, which are detachably arranged between the frame assembly and the mold assembly to cover the push hole.

[0017] According to another aspect of the present invention, a method for making cores by axial compression is provided. The method for making cores by axial compression adopts the above-mentioned device for making cores by axial compression, and the method for making cores by axial compression includes: determining the material ratio required for the core to be made, and combining them as core raw materials; determining the size of the core to be made, and selecting a suitable bushing according to the size, and placing the bushing into a pressing deformation groove; determining the porosity of the core to be made, and adjusting the position of the adjusting bolt according to the size and porosity; filling the core raw material into the bushing, starting the pressing cylinder to push the bushing and form the core; after the pressing is completed, removing the baffles at both ends of the mold assembly, and starting the coring device to push the core out of the push hole.

[0018] By applying the technical solution of the present invention, an axially compressed core making device comprises a frame assembly, a mold assembly, a pressing cylinder and a coring device, wherein the frame assembly has a receiving space and at least two pushing holes connected to the receiving space, and the two pushing holes are coaxially arranged on opposite sides of the receiving space; the mold assembly is detachably arranged in the receiving space, and the mold assembly has a pressing deformation groove, and the pressing deformation groove is filled with core material; the pressing cylinder is arranged on the frame assembly and located in the receiving space, and at least a part of the pressing cylinder abuts against the mold assembly, and the volume of the pressing deformation groove is changed during the extension and retraction of the pressing cylinder to press the core material into a core; the coring device is arranged on the frame assembly and at least a part of the coring device is telescopically arranged in a pushing hole, and the coring device can extend into the pressing deformation groove and push the core out through another pushing hole.

[0019] The frame assembly is used to provide a placement space for the mold assembly, the pressing cylinder, and the coring device. The mold assembly is a mold for making cores. The output shaft of the pressing cylinder can be extended and retracted up and down during the working process. When the output shaft of the pressing cylinder is extended, the output shaft of the pressing cylinder gradually squeezes the mold assembly to apply an extrusion force to the core material in the pressing deformation groove. When the output shaft of the pressing cylinder retracts, the extrusion force on the mold assembly is gradually reduced. The core material is repeatedly pressed in this way, which is convenient for pressing the core material into a core. The size of the pressing deformation groove is variable, so that core materials of different capacities can be placed, and cores of different sizes can be pressed out, so that an axial pressing core making device can press out cores of different sizes, effectively reducing the production cost of artificial cores. In addition, by controlling the pressing stroke of the pressing cylinder, the pressing force of the pressing cylinder can be controlled, thereby controlling the porosity of the core. After the pressing cylinder has completed pressing the core, the coring device is controlled to work so that the coring device pushes the core out of the mold assembly without completely dismantling the axial pressure core making device, which is conducive to quickly taking out the core and reducing the difficulty of core making. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic structural diagram of an axial pressure core making device in an optional embodiment of the present invention is shown;

[0022] Figure 2 Shows Figure 1 A schematic diagram of the structure of the middle frame assembly;

[0023] Figure 3 A schematic diagram showing the positional relationship between the mold assembly and the baffle is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. Frame assembly; 11. Accommodating space; 12. Push hole; 13. Frame body; 14. Center through hole; 15. Connecting hole; 16. Support frame; 161. Mold mounting plate; 162. Cylinder mounting plate; 163. Side support plate; 17. Connecting hole; 20. Mold assembly; 21. Pressing deformation groove; 22. Fixed mold; 23. Accommodating groove; 24. Movable mold; 25. Missing groove; 26. Bushing; 27. Adjusting bolt; 28. Connecting convex edge; 30. Pressing cylinder; 40. Coring device; 50. Baffle. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0029] In order to solve the problems of great difficulty and high cost in manufacturing artificial cores in the prior art, the present invention provides an axial pressure core manufacturing device and an axial pressure core manufacturing method for indoor cores.

[0030] like Figures 1 to 3 As shown, the axial compression type core making device includes a frame assembly 10, a mold assembly 20, a pressing cylinder 30 and a coring device 40, the frame assembly 10 has a accommodating space 11 and at least two pushing holes 12 connected to the accommodating space 11, and the two pushing holes 12 are coaxially arranged on opposite sides of the accommodating space 11; the mold assembly 20 is detachably arranged in the accommodating space 11, and the mold assembly 20 has a pressing deformation groove 21, and the pressing deformation groove 21 is filled with core material; the pressing cylinder 30 is arranged on the frame assembly 10 and is located in the accommodating space 11, at least a part of the pressing cylinder 30 abuts against the mold assembly 20, and the volume of the pressing deformation groove 21 is changed during the extension and retraction of the pressing cylinder 30 to press the core material into a core; the coring device 40 is arranged on the frame assembly 10 and at least a part of the coring device 40 is telescopically arranged in one pushing hole 12, and the coring device 40 can extend into the pressing deformation groove 21 and push the core out through another pushing hole 12.

[0031] The frame assembly 10 is used to provide a placement space for the mold assembly 20, the pressing cylinder 30 and the coring device 40. The mold assembly 20 is a mold for making cores. The output shaft of the pressing cylinder 30 can be extended and retracted up and down during the working process. In the process of extending the output shaft of the pressing cylinder 30, the output shaft of the pressing cylinder 30 gradually squeezes the mold assembly 20 to apply an extrusion force to the core material in the pressing deformation groove 21. In the process of retracting the output shaft of the pressing cylinder 30, the extrusion force on the mold assembly 20 is gradually reduced. The core material is repeatedly pressed in this way, which is convenient for pressing the core material into a core. The size of the pressing deformation groove 21 is variable, so that core materials of different capacities can be placed, and then cores of different sizes can be pressed out, so that a shaft-pressing core making device can press out cores of different sizes, effectively reducing the production cost of artificial cores. In addition, by controlling the pressing stroke of the pressing cylinder 30, the pressing force of the pressing cylinder 30 can be controlled, and then the porosity of the core can be controlled. After the pressing cylinder 30 has completed pressing the core, the coring device 40 is controlled to work so that the coring device 40 pushes the core out of the mold assembly 20 without completely dismantling the axial pressure core making device, which is conducive to quickly taking out the core and reducing the difficulty of core making.

[0032] like Figure 1 and Figure 2 As shown, the frame assembly 10 includes a frame body 13 and a support frame 16. A central through hole 14 is provided on one side surface of the frame body 13. The frame body 13 also has at least two connecting holes 15 connected to the central through hole 14. The support frame 16 is arranged in the central through hole 14, and the support frame 16 is arranged in close contact with the inner wall surface of the central through hole 14. The support frame 16 has a receiving space 11 and at least two connecting holes 17 connected to the receiving space 11. The connecting holes 17 and the connecting holes 15 form a pushing hole 12 coaxially. The central through hole 14 is provided on the frame body 13 to facilitate the connection of the support frame 16 and the frame body 13 together, and at the same time, the receiving space 11 for accommodating the mold assembly 20 and the pressing cylinder 30 is enclosed. The support frame 16 is the basic structure of the frame assembly 10, which bears the stress generated by other components when pressing the core. The support frame 16 is used to strengthen the structural strength of the support frame 16 on the one hand, and provides an installation position for the mold assembly 20 and the pressing cylinder 30 on the other hand.

[0033] like Figure 1 and Figure 2As shown, the support frame 16 includes a mold mounting plate 161, a cylinder mounting plate 162 and two side support plates 163. The mold mounting plate 161 is arranged at the top of the central through hole 14, and the mold assembly 20 is connected to the mold mounting plate 161; the cylinder mounting plate 162 is arranged at the bottom of the central through hole 14, and the pressing cylinder 30 is connected to the cylinder mounting plate 162; the two side support plates 163 are arranged at intervals, and the two ends of the side support plates 163 are respectively connected to the mold mounting plate 161 and the cylinder mounting plate 162 to enclose the accommodating space 11, and the side support plates 163 have a connecting hole 17. The mold mounting plate 161 is used to mount the mold assembly 20, and the cylinder mounting plate 162 is used to mount the pressing cylinder 30. In addition, the mold mounting plate 161 is arranged at the top of the central through hole 14 so that the mold assembly 20 is located above. When the pressing cylinder 30 retracts, the movable part of the mold assembly 20 moves downward under the action of gravity to increase the size of the pressing deformation groove 21. When the pressing cylinder 30 extends, the pressing cylinder 30 pushes the movable part of the mold assembly 20. At this time, the size of the pressing deformation groove 21 becomes smaller to compress the core raw material. The size of the pressing deformation groove 21 changes repeatedly, which is conducive to the core pressing molding. The two side support plates 163 are mainly used to strengthen the structural strength of the frame body 13 and support the baffle 50 when pressing the core.

[0034] Optionally, the central through hole 14 is square, and the supporting frame 16 is also square. The mold mounting plate 161 , the cylinder mounting plate 162 and the two side support plates 163 are all flat plates, which is conducive to the installation of the mold assembly 20 and the pressing cylinder 30 .

[0035] like Figure 3 As shown, the mold assembly 20 includes a fixed mold 22 and a movable mold 24. The fixed mold 22 is connected to the frame assembly 10. The fixed mold 22 has a receiving groove 23 on the side facing the pressing cylinder 30, and the receiving groove 23 runs through two opposite side surfaces of the fixed mold 22; the movable mold 24 is movably arranged in the receiving groove 23, and the movable mold 24 has a missing groove 25 on the side facing the bottom surface of the receiving groove 23, and the missing groove 25 and the receiving groove 23 form a pressing deformation groove 21. The pressing cylinder 30 abuts against the movable mold 24 to push the movable mold 24 to move in the receiving groove 23, thereby changing the distance between the missing groove 25 and the bottom surface of the receiving groove 23, thereby pressing the core raw material into a core. The pressing cylinder 30 cooperates with the movable mold 24 to change the position of the movable mold 24 in the receiving groove 23, thereby changing the distance between the missing groove 25 and the bottom surface of the receiving groove 23, so that the volume of the pressed deformation groove 21 changes. The change in the volume of the pressed deformation groove 21 is conducive to pressing out cores with different diameters and porosities, effectively reducing the production cost of artificial cores.

[0036] like Figure 3As shown, the mold assembly 20 includes at least one bushing 26, which is detachably disposed in the compression deformation groove 21, and the core material is disposed in the bushing 26. The compression cylinder 30 pushes the movable mold 24 to push the bushing 26 and then compress the core material into a core. The arrangement of the bushing 26 confines the core material in a space, reduces the looseness of the core material, and improves the compression efficiency of the core.

[0037] Optionally, there are multiple bushings 26, and the diameters of the multiple bushings 26 are different. When making cores with different diameters, different bushings 26 can be used.

[0038] Specifically, the diameter of the bushing 26 is smaller than the diameter of the pushing hole 12. Setting the diameter of the bushing 26 smaller than the diameter of the pushing hole 12 is conducive to pushing out the bushing 26 and the core.

[0039] Specifically, one of the two pushing holes 12 is a push-in hole, at least a portion of the coring device 40 is telescopically disposed in one of the push-in holes, and the push-out hole is opposite to the push-in hole, and the diameter of the bushing 26 is at least smaller than the diameter of the push-out hole.

[0040] like Figure 3 As shown, the mold assembly 20 further includes a plurality of adjusting bolts 27. The fixed mold 22 has a plurality of adjusting holes on one side of the surface facing the pressing oil cylinder 30. The plurality of adjusting bolts 27 are arranged corresponding to the plurality of adjusting holes, and at least a portion of the adjusting bolts 27 is located on the inner side of the groove side wall of the accommodating groove 23 to limit the movable mold 24. By controlling the extension length of the adjusting bolts 27 relative to the adjusting holes, the maximum stroke of the movable mold 24 is limited, thereby producing cores with different diameters and porosities.

[0041] like Figure 3 As shown, the fixed mold 22 also has at least two connecting protrusions 28, and the connecting protrusions 28 extend outward from two side surfaces penetrated by the receiving groove 23. By providing the connecting protrusions 28 in the fixed mold 22, it is convenient to connect the fixed mold 22 with the frame assembly 10.

[0042] like Figure 1 and Figure 3 As shown, the axial pressure core making device also includes at least two baffles 50, which are detachably arranged between the frame assembly 10 and the mold assembly 20 to cover the push hole 12. The baffle 50 is used to cover the push hole 12 to form a closed space for pressing the core. When the core is taken out, the baffle 50 is removed to expose the push hole 12, so that the core is taken out by the coring device 40.

[0043] In addition, a connecting flange 28 is provided on the fixed mold 22 to provide an installation position for the baffle 50 , so as to facilitate the installation of the baffle 50 between the frame assembly 10 and the mold assembly 20 .

[0044] The method for making cores by axial compression adopts the above-mentioned device for making cores by axial compression, and the method for making cores by axial compression includes: determining the material ratio required for the cores to be made, and preparing the core raw materials; determining the size of the cores to be made, and selecting a suitable bushing 26 according to the size, and placing the bushing 26 into the compression deformation groove 21; determining the porosity of the cores to be made, and adjusting the position of the adjusting bolt 27 according to the size and porosity; filling the core raw materials into the bushing 26, starting the pressing oil cylinder 30 to push the bushing 26 and form the core; after the pressing is completed, removing the baffles 50 at both ends of the mold assembly 20, and starting the coring device 40 to push the core out of the pushing hole 12. The above-mentioned device for making cores by axial compression makes the method for making cores by axial compression simple to operate, and can produce artificial core samples of various specifications with different diameters and porosities, which can meet the use requirements of most core simulation experiments and can quickly prepare artificial core samples of various specifications.

[0045] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0046] 1. The axial pressure core making device in the present application has a simple and reliable structure. The movable mold 24 cooperates with the bushings 26 of different specifications to prepare artificial core samples with different diameters and porosities, which can replace reservoir cores for core physical simulation experiments. It has the advantages of simple operation and low production cost, and solves the problems of shortage, high cost and limited specifications of reservoir cores in indoor physical simulation experiments.

[0047] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An axial compression core making device, characterized in that: include: A frame assembly (10), the frame assembly (10) comprising a receiving space (11) and at least two pushing holes (12) communicating with the receiving space (11), wherein the two pushing holes (12) are coaxially arranged on two opposite sides of the receiving space (11); A mold assembly (20), wherein the mold assembly (20) is detachably disposed in the accommodating space (11), the mold assembly (20) having a compression deformation groove (21), and the compression deformation groove (21) is filled with core raw materials; a pressing cylinder (30), the pressing cylinder (30) being arranged on the frame assembly (10) and located in the accommodating space (11), at least a portion of the pressing cylinder (30) being in contact with the mold assembly (20), and the volume of the pressing deformation groove (21) being changed during the expansion and contraction of the pressing cylinder (30) so as to press the core material into a core; A coring device (40), wherein the coring device (40) is arranged on the frame assembly (10) and at least a portion of the coring device (40) is telescopically arranged in one of the pushing holes (12), and the coring device (40) can extend into the compression deformation groove (21) and push the core out through another of the pushing holes (12).

2. The axial pressure core making device according to claim 1, characterized in that: The frame assembly (10) comprises: A frame body (13), wherein a central through hole (14) is provided on one side surface of the frame body (13), and the frame body (13) further comprises at least two connection holes (15) connected to the central through hole (14); A support frame (16), wherein the support frame (16) is arranged in the central through hole (14), and the support frame (16) is arranged in close contact with the inner wall surface of the central through hole (14), and the support frame (16) has the accommodating space (11) and at least two connecting holes (17) connected to the accommodating space (11), and the connecting hole (17) and the connecting hole (15) are coaxial to form the pushing hole (12).

3. The axial compression core making device according to claim 2, characterized in that: The support frame (16) comprises: A mold mounting plate (161), wherein the mold mounting plate (161) is arranged on the top of the central through hole (14), and the mold assembly (20) is connected to the mold mounting plate (161); A cylinder mounting plate (162), the cylinder mounting plate (162) being arranged at the bottom of the central through hole (14), and the pressing cylinder (30) being connected to the cylinder mounting plate (162); Two side support plates (163), the two side support plates (163) are arranged at intervals, the two ends of the side support plates (163) are respectively connected to the mold mounting plate (161) and the cylinder mounting plate (162) to enclose the accommodating space (11), and the side support plates (163) have the connecting holes (17).

4. The axial compression core making device according to claim 1, characterized in that: The mold assembly (20) comprises: A fixed mold (22), the fixed mold (22) being connected to the frame assembly (10), the fixed mold (22) having a receiving groove (23) on a side facing the pressing cylinder (30), the receiving groove (23) penetrating two opposite side surfaces of the fixed mold (22); A movable mold (24) is movably arranged in the receiving groove (23); the movable mold (24) has a notch (25) on one side of the groove bottom surface of the receiving groove (23); the notch (25) and the receiving groove (23) enclose the pressing deformation groove (21); the pressing cylinder (30) abuts against the movable mold (24) to push the movable mold (24) to move in the receiving groove (23), thereby changing the distance between the notch (25) and the groove bottom surface of the receiving groove (23), and further pressing the core raw material into a core.

5. The axial compression core making device according to claim 4, characterized in that: The mold assembly (20) includes at least one bushing (26), which is detachably disposed in the pressing deformation groove (21), and the core material is disposed in the bushing (26), and the pressing cylinder (30) pushes the movable mold (24) to push the bushing (26) and thereby press the core material into the core.

6. The axial compression core making device according to claim 5, characterized in that: There are a plurality of bushings (26), and the diameters of the bushings (26) are different.

7. The axial compression core making device according to claim 5, characterized in that: The diameter of the bushing (26) is smaller than the diameter of the pushing hole (12).

8. The axial compression core making device according to claim 4, characterized in that: The mold assembly (20) further includes a plurality of adjusting bolts (27), and a surface of the fixed mold (22) on one side facing the pressing cylinder (30) has a plurality of adjusting holes, and the plurality of adjusting bolts (27) are arranged corresponding to the plurality of adjusting holes, and at least a portion of the adjusting bolts (27) is located on the inner side of the groove side wall of the accommodating groove (23) to limit the movable mold (24).

9. The axial compression core making device according to claim 4, characterized in that: The fixed mold (22) also has at least two connecting protrusions (28), and the connecting protrusions (28) extend outward from two side surfaces that penetrate the accommodating groove (23).

10. The axial compression core making device according to any one of claims 1 to 9, characterized in that: The axial pressure core making device further comprises at least two baffles (50), wherein the baffles (50) are detachably arranged between the frame assembly (10) and the mold assembly (20) to cover the pushing hole (12).

11. A method for making a core by axial compression, characterized in that: The method for making a core by axial pressure adopts the device for making a core by axial pressure according to any one of claims 1 to 10, and the method for making a core by axial pressure comprises: Determine the material ratio required for the core to be made and mix them as the core raw material; Determine the size of the core to be produced, select a suitable bushing (26) according to the size, and place the bushing (26) into the compression deformation groove (21); Determining the porosity of the core to be produced, and adjusting the position of the adjusting bolt (27) according to the size and the porosity; Filling the core material into the bushing (26), starting the pressing cylinder (30) to push the bushing (26) and form the core; After the pressing is completed, the baffles (50) at both ends of the mold assembly (20) are removed, and the coring device (40) is started to push the core out of the pushing hole (12).

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