A multi-calibration phantom and a device and a method for making the multi-calibration phantom

Abstract

The present invention relates to a multi-calibration phantom and equipment and a method for making the multi-calibration phantom, comprising a support frame and a first barrel, a second barrel and a third barrel placed on the support frame, a feeding assembly is arranged between the first barrel, the second barrel and the third barrel, the feeding assembly comprises a feeding tube fixedly arranged on the first barrel, the second barrel and the third barrel, a switching assembly is arranged on the feeding tube, the switching assembly comprises a valve body rotatably arranged on the feeding tube and a through opening on the valve body, a forming mold is arranged below the feeding tube, a driving assembly and a discharging assembly driven by the driving assembly are arranged on the forming mold, the discharging assembly comprises a screw rotatably arranged in the forming mold and a discharging plate arranged on the screw, three densities of materials are made by adjusting the ratio between the materials, and the three densities are used to more accurately calibrate the bone density value.

Description

Technical Field

[0001] The present invention relates to the technical field of medical testing instruments, and more particularly to a multi-calibration phantom and a device and a method for making the multi-calibration phantom. Background Art

[0002] CT imaging technology is currently widely used in many fields such as medical treatment and security inspection, and can non-destructively obtain three-dimensional image information of the internal structure of the measured object or person. Before scanning and imaging, it is usually necessary to calibrate the CT imaging system using a calibration phantom, and by continuously adjusting the geometric parameter values ​​in the imaging method, the optimal geometric parameter values ​​closest to the actual scanning system structure can be obtained.

[0003] At present, QCT bone density measurement generally uses a single calibration phantom to calibrate bone density. The manufacturing process of the single calibration phantom is simpler than that of the multi-calibration phantom. However, the density of the single calibration phantom is single, and the calibration bone density value data is inaccurate. The Chinese patent with publication number CN113683827A discloses a single calibration phantom and an apparatus and a manufacturing method for the single calibration phantom, including a support frame and a molding mold. A sealing cover is provided at one end of the molding mold, and a molding push plate is provided at the other end. A chute is provided at the center of the sealing cover, and a powder throwing column is provided in the chute. A powder cavity is provided at the front end of the powder throwing column, and a plurality of powder outlet holes are provided on the wall. The powder throwing column extends into the molding mold, and the space between the powder throwing column and the inner wall of the molding mold is The space between the mold and the patient is filled with polyethylene, and the powder throwing column rotates and withdraws outward to throw out the mixed powder inside and mix it with the polyethylene; a flame nozzle for heating the molding die is also provided on the outer side of the molding die, and the molding push plate extrude and molds the material in the molding die while heating it; the present invention combines a CT scanner, QCT degree and a single calibration phantom to scan in an asynchronous manner with the phantom and the patient separated, so that the measurement accuracy is higher, the measurement is more convenient, and the patient comfort is guaranteed. However, the single density of the single calibration phantom is inaccurate when calibrating the bone density value, and the different densities in the multi-calibration phantom can more accurately calibrate the bone density value. Therefore, multiple calibration phantoms with different densities are particularly important. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-calibration phantom manufacturing device to address the deficiencies of the prior art. By adjusting the ratio between materials, three densities of materials can be made, and the three densities can be used to more accurately calibrate the bone density value.

[0005] The technical solutions of the present invention are as follows:

[0006] A multi-calibration phantom manufacturing device comprises a support frame and a first barrel, a second barrel and a third barrel placed on the support frame, a feeding assembly is arranged between the first barrel, the second barrel and the third barrel, the feeding assembly comprises a feeding tube fixedly arranged on the first barrel, the second barrel and the third barrel, a switching assembly is arranged on the feeding tube, the switching assembly comprises a valve body rotatably arranged on the feeding tube and a through opening on the valve body, a forming mold is arranged below the feeding tube, a driving assembly and a discharging assembly driven by the driving assembly are arranged on the forming mold, the discharging assembly comprises a screw rotatably arranged in the forming mold and a discharging plate arranged on the screw, the The unloading component is used to convey the raw materials in the first barrel, the second barrel and the third barrel to the discharge plate, the driving component is used to drive the screw and the discharge plate to rise and fall and rotate at the same time, the switching component is used to drive the valve body to rotate twice during the rising process of the screw, and switch the connection relationship between the port and the first barrel, the second barrel and the third barrel. The discharge component is used to convey the raw materials in the first barrel, the second barrel and the third barrel from the discharge plate to the molding die in turn for heating and extrusion molding with the cooperation of the driving component, and the molding die body is composed of a first density zone, a second density zone and a third density zone, and the raw material ratios in the three are different.

[0007] Preferably, the first density zone comprises the following raw material components in weight proportions: 87-90 parts of polyethylene, 3-4 parts of tricalcium phosphate, and 6-8 parts of hydroxyapatite; the second density zone comprises the following raw material components in weight proportions: 35-50 parts of polyethylene, 3-4 parts of tricalcium phosphate, and 1-3 parts of hydroxyapatite; the third density zone comprises the following raw material components in weight proportions: 10-25 parts of polyethylene, 1-2 parts of tricalcium phosphate, and 6-8 parts of hydroxyapatite.

[0008] Preferably, the blanking assembly further comprises a plurality of limit plates fixedly arranged on the support frame, and the blanking pipe is fixedly arranged on the limit plates.

[0009] As a preference, the switching assembly also includes a fixed plate fixedly arranged on the support frame, a rotating tube rotatably arranged on the fixed plate, a first bevel tooth fixedly arranged on the rotating tube, a first gear rotatably arranged on the fixed plate, a second bevel tooth fixedly connected to the first gear, a slider slidably arranged on the rotating tube, a moving rod fixedly arranged on the slider, a first rack and a second rack fixedly arranged on the moving rod, the first rack and the second rack are both meshed with the first gear, the first bevel tooth is meshed with the second bevel tooth, the valve body is fixedly arranged on the rotating tube, the through port cooperates with the discharge tube, the inner wall of the screw is in contact with the outer wall of the rotating tube, and the number of teeth of the first gear is three times the number of teeth of the first rack and the second rack.

[0010] Preferably, the driving assembly includes a motor fixedly arranged on one side of the forming mold, a second gear fixedly arranged on the output shaft of the motor, a rotating plate rotatably arranged on the top surface of the forming mold, a ring gear fixedly arranged on the rotating plate, and a nut fixedly arranged on the rotating plate, the second gear is meshed with the ring gear, and the nut is threadedly connected to the screw.

[0011] As a preferred embodiment, the discharging assembly also includes a discharging hole opened on the discharging plate, a sliding plate fixedly arranged on the screw, a heating plate fixedly arranged on the sliding plate, a sliding block fixedly arranged on the sliding plate, a through groove opened on the discharging plate, and a protrusion fixedly arranged on the sliding plate, the protrusion cooperates with the discharging hole, the sliding block cooperates with the through groove, a clamping block is arranged on the sliding block, a clamping slot is arranged on the screw, and the clamping block cooperates with the clamping slot.

[0012] As a preference, a bottom plate is slidably provided on the bottom surface of the forming mold.

[0013] As a preferred embodiment, a moving block is provided on the discharge pipe, a moving groove is provided on the top surface of the valve body, and the moving block cooperates with the moving groove.

[0014] Another design objective of the present invention is to provide a method for making a multi-calibration phantom, comprising the following steps:

[0015] Step 1, loading process: After the through port is connected with the discharge pipe on the first barrel, the first raw material passes through the rotating pipe and falls into the discharge plate, and then the motor drives the second gear, the gear ring and the nut to rotate, driving the screw and the discharge plate to rise and rotate at the same time, and the discharge plate throws the first raw material out of the discharge hole while heating the first raw material;

[0016] Step 2, switching process 1: When the first raw material fills one third of the forming mold, the screw drives the second rack to mesh with the first gear, drives the valve body and the port to rotate 120 degrees to connect with the discharge pipe on the second barrel, and the second raw material falls into the discharge plate, and the discharge plate throws the second raw material out of the discharge hole to the top of the preliminarily solidified first raw material and heats it;

[0017] Step 3, switching process 2: When the second raw material fills two-thirds of the forming mold, the screw drives the first rack to mesh with the first gear, driving the valve body and the port to continue to rotate 120° to connect with the discharge pipe on the third barrel, and the third raw material falls into the discharge plate, and the discharge plate throws the third raw material out of the discharge hole to the top of the preliminarily solidified second raw material and heats it;

[0018] Step 4, molding process: When the third raw material fills the molding mold and initially solidifies, the motor drives the screw and the discharge plate to descend. The discharge plate extrude the third raw material and stops descending. At the same time, the screw drives the sliding plate to descend, driving the protrusion to get stuck in the discharge hole, thereby extruding the third raw material, the second raw material and the first raw material.

[0019] The beneficial effects of the present invention are:

[0020] The present invention is provided with a switching component, and the screw drives the discharge plate to drive the valve body to rotate twice during the process of rising and throwing out the material, switching the connection relationship between the port and the first barrel, the second barrel and the third barrel, so that three raw materials with different densities are transported to the forming mold in sequence. At the same time, the discharge plate can heat the raw materials to make the raw materials initially solidified.

[0021] The present invention is provided with a discharging assembly. When the three raw materials are initially solidified, the discharging plate descends to extrude the third raw material, so that the three raw materials are mutually opposed and adhered. When the third raw material stops moving, the discharging plate also stops descending. At this time, the screw drives the sliding plate to descend, driving the protrusion to be stuck in the discharging hole, and the third raw material, the second raw material and the first raw material are extruded into shape, thereby preventing the third raw material from squeezing into the discharging hole during extrusion.

[0022] In summary, the present invention has the advantages of simple manufacturing process and accurate calibration data, and is suitable for the technical field of medical test instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings:

[0024] Figure 1 A schematic diagram of the structure of a multi-calibration phantom production device;

[0025] Figure 2 It is a structural schematic diagram of the blanking component;

[0026] Figure 3 It is a schematic diagram of the structure of the switching component and the driving component;

[0027] Figure 4 It is a structural schematic diagram of the card block;

[0028] Figure 5 It is a schematic diagram of the structure of the discharging component;

[0029] Figure 6 is a schematic diagram of the structure of the sliding plate;

[0030] Figure 7 It is a schematic diagram of the state when the motor drives the nut to rotate;

[0031] Figure 8A schematic diagram of the state when the raw material in the first barrel fills one third of the forming mold and drives the opening to rotate 120 degrees to connect with the discharge pipe of the second barrel;

[0032] Fig. 9 for Figure 8 Enlarged view of point A in the middle;

[0033] Fig.10 for Figure 8 Enlarged view of point B in the middle;

[0034] Fig.11 for Figure 8 Enlarged view of point C in the middle;

[0035] Fig.12 It is a schematic diagram of the state when the port is rotating;

[0036] Fig.13 It is a schematic diagram of the state when the discharge plate extrude three kinds of raw materials into shape and the screw drives the protrusion to be stuck in the slot;

[0037] Fig.14 A flowchart of the method for making a multi-calibration phantom;

[0038] Fig.15 is a schematic diagram of the structure of the phantom body;

[0039] Figure numerals: 1 support frame, 2 first barrel, 3 second barrel, 4 third barrel, 5 unloading assembly, 51 unloading tube, 52 limit plate, 6 switching assembly, 61 valve body, 62 through port, 63 fixed plate, 64 rotating tube, 65 first bevel gear, 66 first gear, 67 second bevel gear, 69 slider, 610 moving rod, 611 first rack, 612 second rack, 7 molding die, 8 driving assembly, 81 motor, 82 second gear, 83 rotating plate, 84 ring gear, 85 nut, 9 discharging assembly, 91 screw, 92 discharging plate, 93 discharging hole, 94 sliding plate, 95 heating plate, 96 sliding block, 97 through groove, 98 protrusion, 10 bottom plate, 11 block, 12 slot, 13 moving block, 14 moving slot, 111 phantom body, 112 first density zone, 113 second density zone, 114 third density zone. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0041] Embodiment 1

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0043] like Figures 1 to 15 As shown, a multi-calibration phantom manufacturing device includes a support frame 1 and a first barrel 2, a second barrel 3 and a third barrel 4 placed on the support frame 1, a feeding assembly 5 is arranged between the first barrel 2, the second barrel 3 and the third barrel 4, the feeding assembly 5 includes a feeding tube 51 fixedly arranged on the first barrel 2, the second barrel 3 and the third barrel 4, the feeding tube 51 is provided with a switching assembly 6, the switching assembly 6 includes a valve body 61 rotatably arranged on the feeding tube 51 and a through port 62 opened on the valve body 61, a forming mold 7 is arranged below the feeding tube 51, the forming mold 7 is provided with a driving assembly 8 and a discharging assembly 9 driven by the driving assembly 8, the discharging assembly 9 includes a screw 91 rotatably arranged in the forming mold 7 and a discharging plate 92 arranged on the screw 91, and the feeding assembly Component 5 is used to convey the raw materials in the first barrel 2, the second barrel 3 and the third barrel 4 to the discharge plate 92, the driving component 8 is used to drive the screw 91 and the discharge plate 92 to rise and fall and rotate at the same time, the switching component 6 is used for the screw 92 to drive the valve body 61 to rotate twice during the rising process, and the connection relationship between the switching port 62 and the first barrel 2, the second barrel 3 and the third barrel 4 is switched. The discharge component 9 is used to convey the raw materials in the first barrel 2, the second barrel 3 and the third barrel 4 from the discharge plate 92 to the molding die 7 for heating and extrusion molding in turn with the cooperation of the driving component 8, and the molding die 7 forms a mold body 111, and the mold body 111 is composed of a first density zone 112, a second density zone 113, and a third density zone 114, and the raw material ratios in the three are different.

[0044] like Fig.15 As shown, the first density zone 112 contains the following raw material components in weight proportions: 87-90 parts of polyethylene, 3-4 parts of tricalcium phosphate, and 6-8 parts of hydroxyapatite; the second density zone 113 contains the following raw material components in weight proportions: 35-50 parts of polyethylene, 3-4 parts of tricalcium phosphate, and 1-3 parts of hydroxyapatite; the third density zone 114 contains the following raw material components in weight proportions: 10-25 parts of polyethylene, 1-2 parts of tricalcium phosphate, and 6-8 parts of hydroxyapatite.

[0045] like Figure 2 As shown, the material discharge assembly 5 further includes a plurality of limit plates 52 fixedly disposed on the support frame 1 , and the material discharge pipe 51 is fixedly disposed on the limit plates 52 .

[0046] like Figures 3 to 12As shown, the switching assembly 6 also includes a fixed plate 63 fixedly arranged on the support frame 1, a rotating tube 64 rotatably arranged on the fixed plate 63, a first bevel gear 65 fixedly arranged on the rotating tube 64, a first gear 66 rotatably arranged on the fixed plate 63, a second bevel gear 67 fixedly connected to the first gear 66, a slider 69 slidably arranged on the rotating tube 64, a moving rod 610 fixedly arranged on the slider 69, a first rack 611 and a second rack 612 fixedly arranged on the moving rod 610, and the first rack 611 and the second rack 612 are both connected to the first gear The first bevel gear 66 is meshed with the first bevel gear 65 and the second bevel gear 67, the valve body 61 is fixedly arranged on the rotating tube 64, the through port 62 cooperates with the discharge tube 51, the inner wall of the screw 91 is in contact with the outer wall of the rotating tube 64, the number of teeth of the first gear 66 is three times the number of teeth of the first rack 611 and the second rack 612, wherein the initial position of the through port 62 is connected with the discharge tube 51 of the first barrel 2, when in use, the raw material in the first barrel 2 passes through the discharge tube 51 and the rotating tube 64 and falls into the discharge plate 92, and then the motor 81 drives the second gear 82, the gear ring 84 and the nut 85 rotates, and the nut 85 drives the screw 91 and the discharge plate 92 to rise and rotate at the same time, and the discharge plate 92 throws the first raw material out of the discharge hole 93 while heating the first raw material. When the first raw material fills one-third of the forming mold 7, the screw 91 drives the second rack 612 to mesh with the first gear 66, drives the valve body 61 and the port 62 to rotate 120° to communicate with the discharge pipe 51 on the second barrel 3, and the second raw material falls into the discharge plate 92, and the discharge plate 92 throws the second raw material out of the discharge hole 93 until it is initially solidified. When the second raw material fills two-thirds of the forming mold 7, the screw 91 drives the first rack 611 to mesh with the first gear 66, driving the valve body 61 and the through port 62 to continue to rotate 120° to communicate with the discharge pipe 51 on the third barrel 4, and the third raw material falls into the discharge plate 92. The discharge plate 92 throws the third raw material out of the discharge hole 93 to the top of the preliminarily solidified second raw material and heats it. The body model is divided into three equal parts in the axial direction by three raw materials with different ratios, and each part has a different density. The three densities are used to calibrate the bone density value more accurately.

[0047] like Figure 3 As shown, the driving assembly 8 includes a motor 81 fixedly arranged on one side of the forming mold 7, a second gear 82 fixedly arranged on the output shaft of the motor 81, a rotating plate 83 rotatably arranged on the top surface of the forming mold 7, a ring gear 84 fixedly arranged on the rotating plate 83, and a nut 85 fixedly arranged on the rotating plate 83. The second gear 82 is meshed with the ring gear 84, and the nut 85 is threadedly connected to the screw 91.

[0048] like Fig.13As shown, the discharge assembly 9 also includes a discharge hole 93 provided on the discharge plate 92, a sliding plate 94 fixedly provided on the screw 91, a heating plate 95 fixedly provided on the sliding plate 94, a sliding block 96 fixedly provided on the sliding plate 94, a through groove 97 provided on the discharge plate 92, and a protrusion 98 fixedly provided on the sliding plate 94, wherein the protrusion 98 cooperates with the discharge hole 93, the sliding block 94 cooperates with the through groove 97, a clamping block 11 is provided on the slider 69, and a clamping groove 12 is provided on the screw 91. The card block 11 cooperates with the card slot 12. When the third raw material is initially solidified, the motor 81 drives the screw 91 and the discharge plate 92 to descend, and the discharge plate 92 extrude the third raw material. When the third raw material collides with the second raw material and the first raw material, the third raw material stops moving and the discharge plate 92 also stops descending. At this time, the screw 91 drives the sliding plate 94 to descend, driving the protrusion 98 to be stuck in the discharge hole 93, and the third raw material, the second raw material and the first raw material are extruded and formed to prevent the third raw material from squeezing into the discharge hole 93 during extrusion.

[0049] like Figure 3 As shown, a bottom plate 10 is slidably provided on the bottom surface of the forming die 7. After the first raw material, the second raw material and the third raw material are extruded and formed, the bottom plate 10 is removed from the forming die 7, and the discharge plate 92 descends to push the product down, so that the product can be discharged.

[0050] like Fig. 9 As shown, a moving block 13 is provided on the feed pipe 51, and a moving groove 14 is provided on the top surface of the valve body 61. The moving block 13 cooperates with the moving groove 14, so that the valve body 61 rotates more smoothly.

[0051] Embodiment 2

[0052] A method for manufacturing a multi-calibration phantom manufacturing device comprises the following steps:

[0053] Step 1, loading process: when the through port 62 is connected with the discharge pipe 51 on the first barrel 2, the first raw material falls into the discharge plate 92 through the rotating tube 64, and then the motor 81 drives the second gear 82, the gear ring 84 and the nut 85 to rotate, driving the screw 91 and the discharge plate 92 to rise and rotate at the same time, and the discharge plate 92 throws the first raw material out of the discharge hole 93 while heating the first raw material;

[0054] Step 2, switching process 1: When the first raw material fills one third of the forming mold 7, the screw 91 drives the second rack 612 to mesh with the first gear 66, driving the valve body 61 and the through port 62 to rotate 120° to communicate with the discharge pipe 51 on the second barrel 3, and the second raw material falls into the discharge plate 92, and the discharge plate 92 throws the second raw material out of the discharge hole 93 to the top of the preliminarily solidified first raw material and heats it;

[0055] Step 3, switching process 2: when the second raw material fills two-thirds of the forming mold 7, the screw 91 drives the first rack 611 to mesh with the first gear 66, driving the valve body 61 and the port 62 to continue to rotate 120° to communicate with the discharge pipe 51 on the third barrel 4, and the third raw material falls into the discharge plate 92, and the discharge plate 92 throws the third raw material out of the discharge hole 93 to the top of the preliminarily solidified second raw material and heats it;

[0056] Step 4, molding process: When the third raw material fills the molding die 7 and is initially solidified, the motor 81 drives the screw 91 and the discharge plate 92 to descend. The discharge plate 92 extrude the third raw material and stops descending. At the same time, the screw 91 drives the sliding plate 94 to descend, driving the protrusion 98 to get stuck in the discharge hole 93, thereby extruding the third raw material, the second raw material and the first raw material.

[0057] Working process:

[0058] The raw material in the first barrel 2 passes through the discharge pipe 51 and the rotating tube 64 and falls into the discharge plate 92. Then the motor 81 drives the second gear 82, the ring gear 84 and the nut 85 to rotate. The nut 85 drives the screw 91 and the discharge plate 92 to rise and rotate at the same time. The discharge plate 92 throws the first raw material out of the discharge hole 93 and heats the first raw material. When the first raw material fills one-third of the forming mold 7, the screw 91 drives the second rack 612 to mesh with the first gear 66, driving the valve body 61 and the through port 62 to rotate 120° and connect with the discharge pipe 51 on the second barrel 3. The second raw material falls into the discharge plate 92. The discharge plate 92 throws the second raw material out of the discharge hole 93 to the top of the preliminarily solidified first raw material and heats it. When the second raw material fills two-thirds of the forming mold 7, the screw 91 drives the first rack 611 and the first gear 6 6 is meshed, driving the valve body 61 and the through port 62 to continue to rotate 120° and communicate with the discharge pipe 51 on the third barrel 4, and the third raw material falls into the discharge plate 92, and the discharge plate 92 throws the third raw material out from the discharge hole 93 to the top of the preliminarily solidified second raw material and heats it. When the third raw material is preliminarily solidified, the motor 81 drives the screw 91 and the discharge plate 92 to descend, and the discharge plate 92 squeezes the third raw material. When the third raw material conflicts with the second raw material and the first raw material, the third raw material stops moving, and the discharge plate 92 also stops descending. At this time, the screw 91 drives the sliding plate 94 to descend, driving the protrusion 98 to be stuck in the discharge hole 93, and the third raw material, the second raw material and the first raw material are extruded and formed to prevent the third raw material from squeezing into the discharge hole 93 during extrusion. The body model is divided into three equal parts in the axial direction by three raw materials with different proportions, and each part has a different density. The three densities are used to calibrate the bone density value more accurately.

[0059] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front and back", "left and right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the invention.

[0060] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0061] The above description in conjunction with the accompanying drawings is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment. It should be pointed out that for those skilled in the art, various modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the scope of protection of the present invention and will not affect the effect and practicality of the implementation of the present invention.

Claims

1. A multi-calibration phantom manufacturing device, comprising a phantom body (111), wherein the phantom body (111) is composed of a first density area (112), a second density area (113), and a third density area (114), and the raw material ratios in the three areas are different, characterized in that: The invention comprises a support frame (1) and a first material barrel (2), a second material barrel (3) and a third material barrel (4) placed on the support frame (1); a material discharge assembly (5) is arranged between the first material barrel (2), the second material barrel (3) and the third material barrel (4); the material discharge assembly (5) comprises a material discharge pipe (51) fixedly arranged on the first material barrel (2), the second material barrel (3) and the third material barrel (4); the material discharge pipe (51) is provided with a switching assembly (6); the switching assembly (6) comprises a valve body (61) rotatably arranged on the material discharge pipe (51) and a through opening (62) opened on the valve body (61); a valve body (61) fixedly arranged on the support frame ( 1), a fixed plate (63) rotatably arranged on the fixed plate (63), a rotating tube (64) slidably arranged on the rotating tube (64), a forming die (7) is arranged below the discharge tube (51), a driving assembly (8) and a discharge assembly (9) driven by the driving assembly (8) are arranged on the forming die (7), the discharge assembly (9) comprises a screw (91) rotatably arranged in the forming die (7) and a discharge plate (92) arranged on the screw (91), the discharge assembly (9) further comprises a discharge hole (93) opened on the discharge plate (92), a sliding block (69) fixedly arranged on the screw (91) and a discharge hole (93) formed on the discharge plate (92), a sliding block (69) fixedly arranged on the screw (91) and a discharge hole (93) formed on the discharge plate (92). A plate (94), a heating plate (95) fixedly arranged on the sliding plate (94), a sliding block (96) fixedly arranged on the sliding plate (94), a through groove (97) opened on the discharge plate (92), and a protrusion (98) fixedly arranged on the sliding plate (94), wherein the protrusion (98) cooperates with the discharge hole (93), the sliding block (96) cooperates with the through groove (97), a clamping block (11) is arranged on the slider (69), a clamping groove (12) is arranged on the screw rod (91), the clamping block (11) cooperates with the clamping groove (12), and the unloading assembly (5) is used to load the first barrel (2) and the second barrel (3) and the raw materials in the third barrel (4) are transported to the discharge plate (92); the driving component (8) is used to drive the screw (91) and the discharge plate (92) to rise and fall while rotating; the switching component (6) is used to drive the valve body (61) to rotate twice during the rising process of the screw (91), and switch the connection relationship between the port (62) and the first barrel (2), the second barrel (3) and the third barrel (4); the discharge component (9) is used to transport the raw materials in the first barrel (2), the second barrel (3) and the third barrel (4) from the discharge plate (92) to the molding die (7) in sequence with the cooperation of the driving component (8).

2. The multi-calibration phantom manufacturing device according to claim 1, characterized in that: The first density zone (112) comprises the following raw material components in weight proportions: 87-90 parts of polyethylene, 3-4 parts of tricalcium phosphate, and 6-8 parts of hydroxyapatite; the second density zone (113) comprises the following raw material components in weight proportions: 35-50 parts of polyethylene, 3-4 parts of tricalcium phosphate, and 1-3 parts of hydroxyapatite; the third density zone (114) comprises the following raw material components in weight proportions: 10-25 parts of polyethylene, 1-2 parts of tricalcium phosphate, and 6-8 parts of hydroxyapatite.

3. The multi-calibration phantom manufacturing device according to claim 1, characterized in that: The material discharge assembly (5) further comprises a plurality of limit plates (52) fixedly arranged on the support frame (1), and the material discharge pipe (51) is fixedly arranged on the limit plates (52).

4. The multi-calibration phantom manufacturing device according to claim 1, characterized in that: The switching assembly (6) further comprises a first bevel gear (65) fixedly arranged on the rotating tube (64), a first gear (66) rotatably arranged on the fixed plate (63), a second bevel gear (67) fixedly connected to the first gear (66), a moving rod (610) fixedly arranged on the slider (69), a first rack (611) and a second rack (612) fixedly arranged on the moving rod (610), the first rack (611) and the second rack (612) both being meshed with the first gear (66), the first bevel gear (65) being meshed with the second bevel gear (67), the valve body (61) being fixedly arranged on the rotating tube (64), the through port (62) being matched with the discharge tube (51), the inner wall of the screw rod (91) being in contact with the outer wall of the rotating tube (64), and the number of teeth of the first gear (66) being three times the number of teeth of the first rack (611) and the second rack (612).

5. The multi-calibration phantom manufacturing device according to claim 1, characterized in that: The driving assembly (8) comprises a motor (81) fixedly arranged on one side of the forming die (7), a second gear (82) fixedly arranged on the output shaft of the motor (81), a rotating plate (83) rotatably arranged on the top surface of the forming die (7), a gear ring (84) fixedly arranged on the rotating plate (83), and a nut (85) fixedly arranged on the rotating plate (83), wherein the second gear (82) meshes with the gear ring (84), and the nut (85) is threadedly connected to the screw rod (91).

6. The multi-calibration phantom manufacturing device according to claim 1, characterized in that: A bottom plate (10) is slidably disposed on the bottom surface of the forming die (7).

7. The multi-calibration phantom manufacturing device according to claim 1, characterized in that: The feed tube (51) is provided with a moving block (13), the top surface of the valve body (61) is provided with a moving groove (14), and the moving block (13) cooperates with the moving groove (14).

8. A method for manufacturing a multi-calibration phantom manufacturing device, using the multi-calibration phantom manufacturing device according to claim 1, comprising the following steps: Step 1, loading process: when the through port (62) is connected to the discharge pipe (51) on the first barrel (2), the first raw material falls into the discharge plate (92) through the rotating tube (64), and then the motor (81) drives the second gear (82), the ring gear (84) and the nut (85) to rotate, driving the screw (91) and the discharge plate (92) to rise and rotate at the same time, and the discharge plate (92) throws the first raw material out of the discharge hole (93) and heats the first raw material at the same time; Step 2, switching process 1: when the first raw material fills one third of the forming mold (7), the screw (91) drives the second rack (612) to mesh with the first gear (66), driving the valve body (61) and the port (62) to rotate 120 degrees to connect with the discharge pipe (51) on the second barrel (3), and the second raw material falls into the discharge plate (92). The discharge plate (92) throws the second raw material out of the discharge hole (93) to the top of the preliminarily solidified first raw material and heats it; Step 3, switching to process 2: when the second raw material fills two-thirds of the forming mold (7), the screw (91) drives the first rack (611) to mesh with the first gear (66), driving the valve body (61) and the port (62) to rotate 120 degrees again to connect with the discharge pipe (51) on the third barrel (4), and the third raw material falls into the discharge plate (92). The discharge plate (92) throws the third raw material out of the discharge hole (93) to the top of the preliminarily solidified second raw material and heats it; Step 4, molding process: When the third raw material fills the molding die (7) and initially solidifies, the motor (81) drives the screw (91) and the discharge plate (92) to descend. The discharge plate (92) extrude the third raw material and stops descending. At the same time, the screw (91) drives the sliding plate (94) to descend, driving the protrusion (98) to be stuck in the discharge hole (93), thereby extruding and molding the third raw material, the second raw material, and the first raw material.

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