A BPMA sample making apparatus and method

Abstract

This invention discloses a BPMA sample preparation device and method, relating to the field of BPMA sample preparation technology. The BPMA sample preparation device includes a machine body, a rotating mold table, a lifting manipulator for gripping the molded sample, and a cap-removing demolding mechanism. The rotating mold table includes multiple circumferentially equidistantly distributed molding molds; each molding mold includes a mold cylinder and a detachable bottom cover; the cap-removing demolding mechanism includes an electrically operated telescopic push rod and an automatic locking mechanism. The demolding action of this invention relies on the cap-removing demolding mechanism pushing upwards at the bottom of the molding mold via the electrically operated telescopic push rod. An auxiliary core movable within the detachable bottom cover of the molding mold ejects the solidified sample. Simultaneously, the automatic locking mechanism engages with the detachable bottom cover, facilitating direct downward pulling of the detachable bottom cover during the retraction and reset of the electrically operated telescopic push rod. This achieves automatic removal of the detachable bottom cover during the demolding action, eliminating the need for separate bottom cover removal and improving sample preparation efficiency.

Description

Technical Field

[0001] This invention relates to the field of BPMA sample preparation technology, and in particular to a BPMA sample preparation device and method. Background Technology

[0002] BPMA samples are specially prepared for use in automated process mineralogy analyzers. To ensure the reliability and representativeness of the analysis results, multiple samples are generally prepared, and the samples must be highly consistent in size, shape, and surface finish.

[0003] Traditional BPMA sample preparation relies primarily on manual labor, requiring highly skilled operators. Human error during preparation can negatively impact sample quality and test results. Furthermore, the process is cumbersome, time-consuming, and inefficient. Therefore, automated equipment is now being used to continuously and automatically inject the required BPMA powder into the mold, heat and stir the powder within the mold, allow it to cool and solidify, perform demolding, polishing, and sample placement.

[0004] Current automated BPMA sample preparation equipment uses molds consisting of a mold body and a detachable bottom cover. After sample preparation, solidified media and mineral powder remain on the inner wall of the mold and the surface of the bottom cover. If the bottom cover is not separated from the mold body, these residues are difficult to completely remove, affecting the purity of the next sample. Furthermore, if the bottom cover is not separated from the mold body, the ejector pins located at the bottom cover position are prone to wear during the ejection process, making maintenance difficult. Therefore, the bottom cover and mold body are generally designed to be detachable. During the demolding process, the bottom cover must be removed first, and then the solidified sample is ejected from the mold. This requires two completely independent steps: removing the bottom cover at the first position, moving the mold to the next position, and finally ejecting the sample. This process reduces overall production efficiency, especially when preparing multiple samples consecutively, significantly impacting production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a BPMA sample preparation device and method to solve the technical problem in the prior art where the bottom cover removal action and the demolding ejection action are performed completely independently and sequentially during sample solidification and demolding in automated BPMA sample preparation equipment, which affects the sample preparation efficiency.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A BPMA sample preparation device includes a body, a rotating mold stage, a lifting robot for gripping the molded sample, and a cap removal and demolding mechanism. The rotating mold stage includes multiple circumferentially equidistantly distributed molding molds. The molding die includes a die cylinder and a detachable bottom cover inserted into the bottom of the die cylinder; an auxiliary top core is movably disposed at the center of the detachable bottom cover; The demolding mechanism includes an electric telescopic ejector rod and an automatic locking mechanism. The electric telescopic ejector rod is vertically fixed on the machine body. The telescopic end of the electric telescopic ejector rod is used to insert upward into the forming mold and cooperate with the auxiliary ejector core to eject the solid sample. The automatic locking mechanism locks with the detachable bottom cover during the upward ejection of the sample by the telescopic end of the electric telescopic ejector rod. During the retraction and reset of the electric telescopic ejector rod, the automatic locking mechanism pulls the locked detachable bottom cover out from the bottom of the mold cylinder.

[0007] Preferably, the rotary mold table further includes a rotary table and a positioning slot for fixing and holding the forming mold. The rotary table is rotatably mounted on the machine body. Multiple positioning slots are provided and are equidistantly opened at the edge of the rotary table. A first positioning protrusion is fixedly provided near the bottom of the mold cylinder. The first positioning protrusion is used to rest on the upper side of the positioning slot. The detachable bottom cover includes a second positioning protrusion that cooperates with the lower side of the positioning slot.

[0008] Preferably, the detachable bottom cover includes a plug-in cylinder and a conical convex ring, the plug-in cylinder being inserted into the bottom of the mold cylinder; the auxiliary top core is slidably disposed inside the plug-in cylinder, and the conical convex ring is fixedly connected to the bottom outer ring of the plug-in cylinder; the conical convex ring cooperates with an automatic snap-fit ​​mechanism.

[0009] Preferably, the cap removal and demolding mechanism further includes an elastic support member installed at the telescopic end of the electric telescopic push rod, and the automatic locking mechanism is provided in two sets, which are symmetrically distributed on both sides of the elastic support member.

[0010] Preferably, the elastic support includes a support collar and a compressible support spring. The support collar is sleeved on the top of the telescopic end of the electric telescopic rod, and the bottom of the support collar is also connected to the telescopic end of the electric telescopic rod through the support spring.

[0011] Preferably, each set of automatic snap-fit ​​mechanisms includes a pressing block and a connecting sleeve. The bottom of the pressing block is fixedly connected to a slide, the connecting sleeve is connected to an elastic support, the slide slides laterally through the connecting sleeve, and a limit spring is connected between the slide and the connecting sleeve. The pressing block is provided with a first pressing slope that cooperates with the conical convex ring on the side near the electric telescopic top rod.

[0012] Preferably, the auxiliary top core includes a top plate and an extension top rod. The top plate is fitted onto the top of the insertion tube. The extension top rod is vertically fixed to the bottom of the top plate, and a limiting guide sleeve is fixedly connected to the inner side of the insertion tube near the top. The extension top rod slides through the limiting guide sleeve.

[0013] Preferably, the top plate is an elastic metal plate, and elastic metal sheets are integrally fixed on both sides of the top plate, with the bottom of the elastic metal sheets protruding from the side of the insertion cylinder; a spherical protrusion that cooperates with the elastic metal sheet is fixedly connected to the upper side of the end of the extrusion block near the electric telescopic rod.

[0014] Preferably, each set of automatic snap-fit ​​mechanisms further includes a cap-removing and pushing mechanism. The cap-removing and pushing mechanism includes a rotating push plate, a gear, a rack, a limiting inclined block, and a receiving container. One side of the rotating push plate is rotatably connected to the extrusion block. The gear is coaxially fixedly connected to the side of the rotating push plate that is rotatably connected to the extrusion block. The rack meshes with one side of the gear and is fixedly connected to the connecting sleeve. A second extrusion inclined surface is provided below the end of the extrusion block away from the electric telescopic push rod. The limiting inclined block is positioned below the second extrusion inclined surface. The receiving container is used to receive the detachable bottom cover pushed down by the rotating push plate.

[0015] A method for preparing BPMA samples, the specific steps of which are as follows: Step 1: Place the molding mold containing mineral powder onto the rotating mold table; The second step involves feeding the medium powder used to assist in sample curing into the molding die at a predetermined position using a medium feeder. The third step involves using a stirrer to stir the powder inside the molding die after the medium powder has been added, and heating it simultaneously. Step 3: Let it cool and stand still; The fourth step involves using a demolding mechanism to eject the solidified sample from the cooled mold and then using a lifting robotic arm to pick it up. Step 5: By setting up grinding and polishing equipment, the solidified sample grasped by the lifting robot is finely ground, polished, and shaped to be tested.

[0016] The beneficial effects of this invention are: 1. During demolding, the present invention relies on the demolding mechanism to push the bottom of the forming mold upward through the electric telescopic ejector rod. The solidified sample is ejected by the auxiliary ejector core that is movable in the detachable bottom cover of the forming mold. At the same time, the automatic snap-fit ​​mechanism connects with the detachable bottom cover, so that the detachable bottom cover can be pulled downward directly during the retraction and reset of the electric telescopic ejector rod. This realizes the automatic removal of the detachable bottom cover during the demolding process, without the need for separate bottom cover removal, thus improving the sample production efficiency.

[0017] 2. During the lifting process of the electric telescopic rod of the present invention, the extrusion blocks distributed on both sides rely on the first extrusion inclined surface to perform inclined extrusion action with the conical convex ring on the detachable bottom cover, thereby facilitating the extrusion block separation. Then, the limit spring rebound force resets and blocks on the upper side of the conical convex ring. Thus, when the electric telescopic rod descends, the extrusion blocks distributed on both sides can push the conical convex ring, so that the plug-in cylinder of the detachable bottom cover can be pulled out from the bottom of the mold cylinder, realizing automatic cover removal during the demolding action reset process.

[0018] 3. In this invention, the extrusion blocks distributed on both sides of the telescopic end of the electric telescopic rod, after being extruded by the first extrusion inclined surface through the position of the conical convex ring, rebound and reset by the rebound force of the limiting spring. During this process, the extrusion blocks impact the distributed elastic metal sheets by the provided spherical protrusions, thereby causing the elastic metal sheets to vibrate and transmit the vibration to the top plate, which serves as an elastic metal plate. The top plate then vibrates, facilitating separation from the bonded cured sample and making it convenient for the subsequent lifting robot arm to remove the cured sample lifted by the top plate.

[0019] 4. In this invention, the electric telescopic rod, relying on the automatic locking mechanisms on both sides, lowers the detachable bottom cover to the corresponding position. The pressing blocks of the automatic locking mechanisms on both sides then generate a sloped pressing effect based on the second pressing slope and the limiting slope block. This facilitates the pressing blocks sliding away from the conical convex ring on the detachable bottom cover by relying on the sliding bracket relative to the connecting sleeve. At the same time, the laterally sliding pressing blocks drive the gear to roll along the set rack. The gear then drives the rotating push plate to rotate and approach the detachable bottom cover, thus facilitating the pushing of the detachable bottom cover into the receiving container. This makes it convenient to continue the cap removal and demolding action for the next molding mold, realizing continuous operation of multiple molding molds and effectively improving the overall production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 A magnified schematic diagram of the local structure at point A; Figure 3 This is a schematic diagram showing the relative positions of the cap removal and demolding mechanism, the feeder, and the agitator in this invention. Figure 4 yes Figure 3 A magnified schematic diagram of the local structure at point B; Figure 5 This is a schematic cross-sectional view of the molding die in this invention; Figure 6 This is a schematic cross-sectional view of the fitting arrangement of the plug-in tube and the top plate in this invention; Figure 7This is a schematic diagram showing the relative positions of the missing support ring, the molding die, and the cap removal and demolding mechanism in this invention. Figure 8 This is a schematic diagram of the structure of the receiving container in this invention, which uses a slanted rail frame and a cap removal and demolding mechanism in combination; Figure 9 This is a schematic diagram of the structure in which the support collar and the electric telescopic rod are connected in this invention; Figure 10 yes Figure 3 A magnified schematic diagram of the local structure at point C; Figure 11 This is a schematic diagram of the structure in which the rotating pusher plate and the extrusion block are connected in this invention; Figure 12 This is a schematic diagram of the distribution of the rotating push plate position after the extrusion block rises and disengages from the limiting inclined block in this invention; Figure 13 This is a schematic diagram of the structure when the extrusion block rises and contacts the conical convex ring through the first extrusion inclined surface in this invention; Figure 14 This is a schematic diagram of the structure in this invention where the extrusion block is extruded on the upper side of the conical convex ring; Figure 15 This is a schematic diagram of the structure of the present invention, in which the extrusion block descends and engages with the limiting inclined block through the second extrusion inclined surface; Figure 16 This is a schematic diagram of the structure of the receiving container in this invention, which uses a rhomboid box and a lid-removing and demolding mechanism.

[0021] Explanation of reference numerals in the attached figures: 1. Machine body; 2. Grinding and polishing equipment; 3. Lifting robot; 4. Main guide rail; 5. Sample stage; 6. Rotary mold stage; 61. Rotary table; 62. Forming mold; 621. Mold cylinder; 622. First positioning convex ring; 623. Second positioning convex ring; 624. Insertion cylinder; 625. Conical convex ring; 626. Top plate; 627. Extension ejector rod; 628. Elastic metal sheet; 63. Positioning slot; 64. Damaged support ring; 7. Media feeder; 71. First screw feeder; 72. Second screw feeder; 8. Pulling 81. Demolding mechanism; 82. Electric telescopic ejector rod; 83. Inclined rail frame; 84. Automatic locking mechanism; 85. Extrusion block; 86. Spherical protrusion; 87. First extrusion slope; 88. Second extrusion slope; 89. Limiting slope block; 80. Rotating push plate; 81. Gear; 82. Rack; 80. Slide; 81. Connecting square sleeve; 82. Limiting spring; 83. Support collar; 84. Support spring; 85. Support spring; 86. Inclined square box; 9. Agitator; 97. Rotary disc; 98. Electric lifting rod. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0023] like Figures 1-16 As shown, a BPMA sample preparation device is used for the automated preparation of solid samples for auxiliary detection of mineral powder. The device includes a body 1, a rotating mold stage 6, a lifting manipulator 3 for grasping and molding the sample, and a cap removal and demolding mechanism 8. The rotating mold stage 6 is installed on one side of the body 1 and includes multiple circumferentially equidistant molding molds 62. During preparation, the mineral powder to be tested is pre-quantitatively loaded into each molding mold 62 by a human operator. A media feeder 7 is also provided above the rotating mold stage 6. The media feeder 7 is used to add the powder media for solidifying the auxiliary sample into each molding mold 62 it passes through. The media feeder 7 specifically includes a fixed mounting base, a first screw feeder 71 fixedly mounted on the fixed mounting base, and a second screw feeder 72. When the media to be added is divided into media A and media B, the first screw feeder 71 is used to transport media B powder, and the second screw feeder 72 is used to transport media A powder. The discharge port of the first screw feeder 71 can be divided into two conveying pipes to transport media B powder in two separate streams. One conveying pipe of the first screw feeder 71 intersects with the conveying pipe of the second screw feeder 72 to mix and transport the two media (A and B) to a point where they have been processed. The first feeding position is within the forming mold 62; another conveying pipe of the first screw feeder 71 is used to separately convey B medium powder to the forming mold 62 passing through the second feeding position, and the separately conveyed B medium powder passes through a heater, which can heat the separately conveyed B medium; an agitator 9 is also distributed on the rotation trajectory of the rotating mold table 6, and the agitator 9 is located between the first feeding position and the second feeding position. The agitator 9 includes a rotating disk 91, an electric lifting rod 92, and a stirring component. The electric lifting rod 92 is used to drive the rotating disk 91 to rise and fall, and a stepper motor is installed on the telescopic end of the electric lifting rod 92. The rotating disk 91 is driven to rotate in a stepwise manner. Multiple stirring components are provided and are equidistantly distributed on the rotating disk 91. The stirring components are distributed correspondingly to the molding mold 62. Whenever a molding mold 62 rotates to the position of the stirrer 9, it is aligned with one of the stirring components. At this time, the electric lifting rod 92 drives the rotating disk 91 to descend, thereby causing the corresponding stirring component to descend and stir the powder in the molding mold 62 and the added A and B medium powders, so as to achieve uniform mixing. The stirring components are also equipped with electric heating elements for heating during the stirring process. After heating and stirring, the sample is allowed to cool for a period of time to facilitate solidification and molding.

[0024] After the sample is heated and stirred, it needs to be allowed to cool for a period of time. Since the heated B medium powder has been added again, it needs to be allowed to cool for a period of time before demolding. Therefore, the demolding mechanism 8 is used to push the molded sample out of the mold 62 to achieve demolding. Then, the set lifting robot 3 grabs the molded sample. The lifting robot 3 can move laterally along the set main guide rail 4 and pass through the grinding and polishing equipment 2. The grinding and polishing equipment 2 performs fine grinding, fine grinding and polishing on the bottom of the molded sample grabbed by the lifting robot 3 in sequence. In order to achieve multiple degrees of grinding, multiple grinding and polishing equipment 2 can be distributed laterally in sequence. Multiple lifting robots 3 can also be set to facilitate the fine grinding of the previous sample and the fine grinding of the next sample. A sample stage 5 is set on the other side of the machine body 1. The lifting robot 3 is used to place the molded sample after grinding and polishing on the sample stage 5. The bottom of the sample stage 5 is set with a secondary guide rail. The secondary guide rail can drive the sample stage 5 to move in a direction perpendicular to the driving direction of the main guide rail 4 to facilitate the placement of the sample.

[0025] To facilitate subsequent cleaning of the molding die 62 and improve demolding efficiency and overall production efficiency, the molding die 62 includes a die cylinder 621 and a detachable bottom cover inserted into the bottom of the die cylinder 621; an auxiliary top core is movably provided in the center of the detachable bottom cover; The demolding mechanism 8 includes an electric telescopic ejector rod 81 and an automatic locking mechanism 83. The electric telescopic ejector rod 81 is vertically fixed on the machine body 1, with its extension and retraction facing upwards and aligned below the rotation trajectory of the forming mold 62. The telescopic end of the electric telescopic ejector rod 81 is used to insert upwards into the forming mold 62 and cooperate with the auxiliary ejector core to eject the solid sample. The automatic locking mechanism 83 locks with the detachable bottom cover during the upward ejection of the sample by the telescopic end of the electric telescopic ejector rod 81. During the retraction and reset of the electric telescopic ejector rod 81, the automatic locking mechanism 83 pulls the locked detachable bottom cover out from the bottom of the mold cylinder 621. That is, the detachable bottom cover can be removed during the demolding action. The mold cylinder 621 with the detachable bottom cover removed and the detachable bottom cover can be cleaned separately and effectively.

[0026] A method for preparing BPMA samples, the specific steps of which are as follows: Step 1: Place the molding mold 62 containing mineral powder onto the rotating mold table 6; The second step is to use the medium feeder 7 to feed the medium powder used to assist in sample curing into the molding die 62 at the set position; The third step involves using a stirrer 9 to stir the powder inside the molding mold 62 after the medium powder has been added, and heating it simultaneously. The third step is to set the time for static cooling, and depending on the sample type, you can choose whether to continue adding the corresponding type of medium powder and heating. If heating is required, static cooling is required again. The fourth step is to eject the solidified sample from the mold 62 after it has been left to cool and stand by using the demolding mechanism 8, and then grab it by the lifting robot arm 3. Step 5: By setting up grinding and polishing equipment 2, the solidified sample grasped by the lifting robot arm 3 is finely ground, polished and refined to obtain the shaped sample to be tested; In some specific implementation schemes, refer to Figure 2 and Figure 4 As shown, the rotary mold table 6 also includes a rotary table 61 and positioning slots 63 for fixing and holding the forming mold 62. The rotary table 61 is rotatably mounted on the machine body 1, and the rotary table 61 is driven by a stepper motor to deflect intermittently at a fixed angle. Multiple positioning slots 63 are provided and are equidistantly opened at the edge of the rotary table 61. A first positioning protrusion ring 622 is fixedly provided near the bottom of the mold cylinder 621. The first positioning protrusion ring 622 is used to support the upper side of the positioning slot 63, that is, the diameter of the first positioning protrusion ring 622 is larger than the width of the positioning slot 63. The outer diameter of the mold cylinder 621 does not exceed the width of the positioning groove 63, which makes it easy for the mold cylinder 621 to be inserted into the positioning groove 63. The detachable bottom cover includes a second positioning protrusion 623 that cooperates with the lower side of the positioning groove 63, and the diameter of the second positioning protrusion 623 is greater than the width of the positioning groove 63. Thus, the first positioning protrusion 622 and the second positioning protrusion 623 are clamped on the upper and lower sides of the positioning groove 63, effectively preventing the entire molding mold 62 from moving longitudinally, thereby facilitating the demolding of the top mold and also making it easy for the operator to pick up and put down the molding mold 62.

[0027] In some specific implementation schemes, refer to Figures 4 to 6 As shown, the detachable bottom cover includes a connector 624 and a conical convex ring 625. The connector 624 is inserted into the bottom of the mold cylinder 621. The internal space of the mold cylinder 621 can be divided into two parts: a material cavity for storing powder and a docking cavity. The connector 624 is inserted into the docking cavity. To facilitate fixation, an anti-slip rubber ring can be fixedly installed on the outer wall of the connector 624. The outer diameter of the anti-slip rubber ring is slightly larger than the inner diameter of the docking cavity of the mold cylinder 621. The anti-slip effect is achieved by compression deformation. A rubber ring is inserted; alternatively, the insertion cylinder 624 can be made of magnetic metal material, with magnets installed on the inner wall of the mating cavity of the mold cylinder 621 for adsorption; the second positioning protrusion ring 623 can be fixedly set on the outer wall of the insertion cylinder 624; the auxiliary top core is slidably fitted inside the insertion cylinder 624, the insertion cylinder 624 is a through cylinder, and the conical protrusion ring 625 is fixedly connected to the bottom outer ring of the insertion cylinder 624, with the conical surface of the conical protrusion ring 625 facing downwards; the conical protrusion ring 625 cooperates with the automatic snap-fit ​​mechanism 83.

[0028] In some specific implementations, the demolding mechanism 8 also includes an elastic support installed at the telescopic end of the electric telescopic push rod 81. Two sets of automatic locking mechanisms 83 are provided and symmetrically distributed on both sides of the elastic support. After the elastic support facilitates the automatic locking mechanism 83 to dock onto the detachable bottom cover, the telescopic end of the electric telescopic push rod 81 can still move upward to complete the demolding action of the top mold.

[0029] Among them, reference Figure 9 As shown, the elastic support includes a support collar 84 and a compressible support spring 85. The support collar 84 is sleeved on the top of the telescopic end of the electric telescopic rod 81, and the bottom of the support collar 84 is also connected to the telescopic end of the electric telescopic rod 81 through the support spring 85. The initial position of the electric telescopic rod 81 does not exceed the support collar 84.

[0030] In some specific implementation schemes, refer to Figure 9 and Figure 11 As shown, each automatic snap-fit ​​mechanism 83 includes a pressing block 831 and a connecting sleeve 838. A slide 837 is fixedly connected to the bottom of the pressing block 831, and the connecting sleeve 838 is connected to an elastic support member. Specifically, the connecting sleeve 838 is fixedly connected to the outer wall of the support ring 84 through a bracket. The slide 837 slides laterally through the connecting sleeve 838, and a compressible limiting spring 839 is also connected between the slide 837 and the connecting sleeve 838. The pressing block 831 is provided with a first pressing inclined surface 832 that cooperates with the conical convex ring 625 on the side near the electric telescopic top rod 81. It should be noted that when the limiting spring 839 is in its original uncompressed state, the first pressing inclined surface 832 is longitudinally aligned with the conical surface of the conical convex ring 625, and the position of the pressing block 831 is higher than the height of the support ring 84.

[0031] When the molding mold 62 containing the cured sample rotates to directly above the electric telescopic ejector rod 81, the electric telescopic ejector rod 81 is extended by the matching controller. The electric telescopic ejector rod 81, along with the automatic locking mechanisms 83 distributed on both sides, rises closer to the detachable bottom cover of the molding mold 62. When the extrusion blocks 831 of the automatic locking mechanisms 83 on both sides rise to the position of the conical convex ring 625 of the detachable bottom cover, the extrusion blocks 831 adhere to the conical surface of the conical convex ring 625 by means of the first extrusion inclined surface 832 provided at the end. At this time, the support collar 84 and the insertion cylinder 62... 4. The gap between the bottoms is greater than the thickness of the extrusion block 831; during the continuous upward movement of the electric telescopic rod 81, the first extrusion inclined surface 832 and the conical surface of the conical convex ring 625 exert an extrusion action. During this process, the specifications of the support spring 85 are much larger than those of the limit spring 839, so the support spring 85 does not undergo compression deformation. However, due to the extrusion action, the first extrusion inclined surface 832 is subjected to a lateral component force, causing the extrusion block 831, along with the slide 837, to slide laterally away from the telescopic end of the electric telescopic rod 81 relative to the connecting square sleeve 838, and compressing the limit spring 839. This achieves the extrusion block 831... 31. Laterally avoids the conical protruding ring 625. When the end of the extrusion block 831 with the first extrusion slope 832 completely passes the position of the conical protruding ring 625, the limiting spring 839 releases its rebound force, causing the slide 837 to drive the extrusion block 831 to return to its original position and block the upper layer of the conical protruding ring 625. At this time, the support collar 84 is exactly in contact with the bottom of the insertion cylinder 624. Then, as the electric telescopic push rod 81 continues to extend, its telescopic end rises relative to the support collar 84 and compresses the support spring 85. Then, the telescopic end of the electric telescopic push rod 81 inserts into the insertion cylinder 624 and pushes it. An auxiliary top core is used to lift the solid sample from the mold cylinder 621, and the sample is then picked up by the lifting robot arm 3. After the sample is removed, the electric telescopic top rod 81 begins to retract. During the retraction process, when its telescopic end returns to its relative position with the support collar 84, the support collar 84 drives the automatic locking mechanisms 83 on both sides to descend synchronously as the electric telescopic top rod 81 retracts. The automatic locking mechanisms 83 then push the conical convex ring 625 against the squeezing block 831 on the upper side of the conical convex ring 625, so that the insertion tube 624 is pulled out from the bottom of the mold cylinder 621, thus removing the cap.

[0032] In some specific implementation schemes, refer to Figure 5 and Figure 6As shown, the auxiliary core includes a top plate 626 and an extension rod 627. The top plate 626 is fitted on the top of the insertion cylinder 624 and is spliced ​​with the bottom of the material cavity inside the mold cylinder 621 to form a complete inner bottom surface. The outer diameter of the top plate 626 is equal to the outer diameter of the insertion cylinder 624. The extension rod 627 is vertically fixedly connected to the bottom of the top plate 626, and a limit guide sleeve is fixedly connected to the inner side of the insertion cylinder 624 near the top. The extension rod 627 slides through the limit guide sleeve. To prevent the extension rod 627 from disengaging from the limit guide sleeve from bottom to top, a stop block can be set at the bottom of the extension rod 627.

[0033] When the telescopic end of the electric telescopic ejector rod 81 is inserted into the plug tube 624, its telescopic end abuts against the bottom of the extension ejector rod 627. Then the extension ejector rod 627 drives the top plate 626 to rise, thereby relying on the top plate 626 to drive the solidified sample to rise from the mold tube 621, thus achieving demolding.

[0034] In some specific implementations, to assist in the effective separation of the cured sample from the surface of the top plate 626, a release agent can be sprayed onto the surface of the top plate 626. The top plate 626 can also be configured as an elastic metal plate, with elastic metal sheets 628 integrally fixed on both sides. The bottom of the elastic metal sheet 628 extends from the side of the insertion cylinder 624 and is positioned above the conical convex ring 625. Specifically, openings can be made on both sides of the insertion cylinder 624 so that the bottom of the elastic metal sheet 628 protrudes from the openings, and the size of the openings is larger than the width of the elastic metal sheet 628. A spherical protrusion 8311, which mates with the elastic metal sheet 628, is fixedly connected to the upper side of the extrusion block 831 near the electric telescopic rod 81. The distance between the bottom edge of the elastic metal sheet 628 and the upper surface of the conical convex ring 625 is greater than the thickness of the extrusion block 831.

[0035] When the extrusion block 831 passes through the position of the conical convex ring 625 due to the extrusion action of the first extrusion inclined surface 832 and the conical convex ring 625, the elastic force released by the limiting spring 839 causes the extrusion block 831 to rush towards the upper position of the conical convex ring 625. During this process, the spherical protrusion 8311 on the extrusion block 831 aligns with the bottom of the elastic metal sheet 628 on the corresponding side. The elastic force released by the limiting spring 839 can deform the elastic metal sheet 628. Therefore, the spherical protrusion 8311 impacts the bottom position of the elastic metal sheet 628, causing the elastic metal sheet 628 to bend and deform, and generate rebound vibration. The vibration can be transmitted to the top plate 626 along the elastic metal sheet 628, and the top plate 626 will vibrate accordingly, which facilitates the separation of the sample from the upper surface of the top plate 626 by vibration-assisted curing.

[0036] In some specific implementations, to facilitate the automatic transfer and storage of the removed removable bottom cover, and to allow for the continuous removal of multiple removable bottom covers from the molding die 62, see reference... Figure 10 and Figure 11 As shown, each automatic latching mechanism 83 also includes a cap-removing and pushing mechanism. The cap-removing and pushing mechanism includes a rotating push plate 836, a gear 8361, a rack 8362, a limiting inclined block 834, and a receiving container. One side of the rotating push plate 836 is rotatably connected to the pressing block 831 via a vertical rotating shaft. When the limiting spring 839 is in its original, uncompressed state, the rotating push plate 836 is positioned behind the pressing block 831, away from the electric telescopic push rod 81. This avoids obstructing the pressing block 831 from rising and interacting with the conical convex ring 625. The gear 8361... 61 is coaxially fixedly connected to one side of the rotating push plate 836 and rotatingly connected to the extrusion block 831. The rack 8362 meshes with one side of the gear 8361, and the sliding direction of the rack 8362 is parallel to that of the slide 837. The rack 8362 and the connecting square sleeve 838 are fixedly connected by a bracket. A second extrusion inclined surface 833 is provided below the end of the extrusion block 831 away from the electric telescopic push rod 81. The limiting inclined surface stop block 834 is located below the second extrusion inclined surface 833. The receiving container is used to receive the detachable bottom cover pushed down by the rotating push plate 836.

[0037] When the electric telescopic push rod 81 retracts, the extrusion blocks 831 distributed on both sides cooperate with the conical convex ring 625 to pull the entire detachable bottom cover out from the bottom of the mold cylinder 621 and lower it to the position of the limiting inclined block 834. At this time, the second extrusion inclined surface 833 on the extrusion block 831 contacts the inclined surface of the limiting inclined block 834 and generates an extrusion action. During this process, the second extrusion inclined surface 833 is pushed by the lateral component force, which causes the extrusion block 831 to slide away from the telescopic end of the electric telescopic push rod 81 by the slide 837 and compress the limiting spring 839. During this process, the gear 8361 connected to the rotating push plate 836 rolls along the rack 8362, which causes the rotating push plate 836 to deflect towards the detachable bottom cover at the top of the electric telescopic push rod 81. During this process, the extrusion block 831 moves laterally and disengages from the conical convex ring 625 of the detachable bottom cover. Finally, the rotating push plate 836 pushes the detachable bottom cover to the position of the receiving container to achieve automatic recycling and storage.

[0038] The receiving container can be a slanted rail frame 82, for reference. Figure 8 As shown, the inclined rail frame 82 includes two parallel guide rods. The distance between the two guide rods is between the dimensions of the second positioning protrusion ring 623 and the insertion cylinder 624. The higher end of the inclined rail frame 82 is aligned with the position where the rotating push plate 836 pushes the detachable bottom cover, and can just hold the second positioning protrusion ring 623.

[0039] In other solutions, the receiving container can also be a rhomboid box 86, see reference. Figure 16As shown, the cross-section of the rhomboid box 86 is U-shaped, which can directly receive the detachable bottom cover pushed down by the rotating push plate 836.

[0040] In some specific implementations, in order to prevent the detachable bottom cover of the molding mold 62 from accidentally falling off during the rotation of the rotary table 61, a defective support ring 64 fixedly connected to the machine body 1 is provided at the bottom edge of the rotary table 61. The defective support ring 64 provides support for the detachable bottom covers of all molding molds 62 except for the demolding position. The defective support ring 64 is provided with a notch at the demolding position to facilitate the normal demolding action of the cap removal mechanism 8.

[0041] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: When the mineral powder and mixed medium inside the molding die 62 have solidified into a solid sample, and the molding die 62 rotates with the rotary table 61 to reach above the demolding mechanism 8, the electric telescopic ejector rod 81 is extended by the matching controller. The electric telescopic ejector rod 81, along with the automatic locking mechanisms 83 distributed on both sides, rises closer to the detachable bottom cover of the molding die 62. When the extrusion blocks 831 of the automatic locking mechanisms 83 on both sides rise to the position of the conical convex ring 625 of the detachable bottom cover, the extrusion blocks 831 adhere to the conical surface of the conical convex ring 625 by relying on the first extrusion inclined surface 832 provided at the end. During the continuous rise of the electric telescopic ejector rod 81, the first extrusion inclined surface 832 and the conical surface of the conical convex ring 625 exert a squeezing effect. During the process, the specifications of the support spring 85 are much larger than those of the limit spring 839, so the support spring 85 does not undergo compression deformation. However, due to the compression action of the first extrusion inclined surface 832, it is subjected to a lateral component force, causing the extrusion block 831 to slide laterally away from the telescopic end of the electric telescopic top rod 81 relative to the connecting square sleeve 838, and compressing the limit spring 839. In this way, the extrusion block 831 can laterally avoid the conical convex ring 625. When the end of the extrusion block 831 with the first extrusion inclined surface 832 completely passes through the position of the conical convex ring 625, the limit spring 839 releases its rebound force, thereby causing the slide 837 to drive the extrusion block 831 to return to its original position and block the upper layer of the conical convex ring 625. At this time, the support sleeve 84 is exactly in contact with the bottom of the plug-in cylinder 624.

[0042] Furthermore, when the extrusion block 831 passes through the position of the conical convex ring 625 due to the extrusion action of the first extrusion inclined surface 832 and the conical convex ring 625, the rebound force released by the limiting spring 839 causes the extrusion block 831 to instantly rush towards the upper position of the conical convex ring 625. During this process, the spherical protrusion 8311 on the extrusion block 831 aligns with the bottom of the elastic metal sheet 628 on the corresponding side, and the elastic force released by the limiting spring 839 can deform the elastic metal sheet 628. Therefore, during this process, the spherical protrusion 8311 impacts the position of the bottom of the elastic metal sheet 628, thereby causing the elastic metal sheet 628 to bend and deform, and generate rebound vibration. The vibration can be transmitted to the top plate 626 along the elastic metal sheet 628, and the top plate 626 will vibrate accordingly, which facilitates the separation of the sample from the upper surface of the top plate 626 by means of vibration-assisted curing.

[0043] As the electric telescopic push rod 81 continues to extend, its telescopic end rises relative to the support collar 84 and compresses the support spring 85. Then, the telescopic end of the electric telescopic push rod 81 inserts into the insertion tube 624 and pushes the auxiliary core, thereby causing the auxiliary core to lift the solid sample from the mold cylinder 621. Finally, the lifting robot 3 grabs the sample. After the sample is removed, the electric telescopic push rod 81 begins to retract. During the retraction process, when its telescopic end returns to its relative position with the support collar 84, the support collar 84 drives the automatic locking mechanisms 83 on both sides to descend synchronously as the electric telescopic push rod 81 retracts. The automatic locking mechanisms 83 then push the conical convex ring 625 with the squeezing block 831 blocking the upper side of the conical convex ring 625, causing the insertion tube 624 to be pulled out from the bottom of the mold cylinder 621, thus removing the cap.

[0044] When the entire detachable bottom cover is pulled out from the bottom of the mold cylinder 621 and descends to the position of the limiting inclined block 834, the second extrusion inclined surface 833 on the extrusion block 831 contacts the inclined surface of the limiting inclined block 834 and generates an extrusion action. During this process, the second extrusion inclined surface 833 is pushed by the lateral component force, which causes the extrusion block 831 to slide away from the telescopic end of the electric telescopic push rod 81 by relying on the slide 837 and compress the limiting spring 839. During this process, the gear 8361 connected to the rotating push plate 836 rolls along the rack 8362, which causes the rotating push plate 836 to deflect towards the detachable bottom cover at the top of the electric telescopic push rod 81. During this process, the extrusion block 831 moves laterally away from the conical convex ring 625 of the detachable bottom cover. Finally, the rotating push plate 836 pushes the detachable bottom cover to the position of the receiving container to achieve automatic recycling and storage, which facilitates the direct removal of the cover from the next molding mold 62 and sample demolding.

[0045] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A BPMA sample preparation device, comprising a body (1), a rotating mold stage (6), a lifting manipulator (3) for gripping the molded sample, and a cap removal and demolding mechanism (8), wherein the rotating mold stage (6) comprises a plurality of circumferentially equidistantly distributed molding molds (62); characterized in that: The molding die (62) includes a die cylinder (621) and a detachable bottom cover inserted into the bottom of the die cylinder (621); an auxiliary top core is movably provided in the center of the detachable bottom cover; The demolding mechanism (8) includes an electric telescopic push rod (81) and an automatic snap-fit ​​mechanism (83). The electric telescopic push rod (81) is vertically fixed on the machine body (1). The telescopic end of the electric telescopic push rod (81) is used to insert upward into the molding mold (62) and cooperate with the auxiliary core to eject the solid sample. The automatic snap-fit ​​mechanism (83) snaps with the detachable bottom cover during the upward ejection of the sample by the telescopic end of the electric telescopic push rod (81). During the retraction and reset of the electric telescopic push rod (81), the automatic snap-fit ​​mechanism (83) pulls the snapped detachable bottom cover out from the bottom of the mold cylinder (621).

2. A BPMA sample making apparatus according to claim 1, wherein, The rotating mold table (6) also includes a rotating table (61) and a positioning slot (63) for fixing and holding the forming mold (62). The rotating table (61) is rotatably mounted on the machine body (1). Multiple positioning slots (63) are provided and are equidistantly opened at the edge of the rotating table (61). A first positioning protrusion (622) is fixedly provided near the bottom of the mold cylinder (621). The first positioning protrusion (622) is used to be mounted on the upper side of the positioning slot (63). The detachable bottom cover includes a second positioning protrusion (623) that cooperates with the lower side of the positioning slot (63).

3. A BPMA sample making apparatus according to claim 1, wherein, The detachable bottom cover includes a plug-in cylinder (624) and a conical convex ring (625). The plug-in cylinder (624) is inserted into the bottom of the mold cylinder (621). The auxiliary top core is slidably fitted inside the plug-in cylinder (624). The conical convex ring (625) is fixedly connected to the bottom outer ring of the plug-in cylinder (624). The conical convex ring (625) cooperates with the automatic snap-fit ​​mechanism (83).

4. A BPMA sample production apparatus according to claim 3, wherein, The cap removal and demolding mechanism (8) also includes an elastic support installed at the telescopic end of the electric telescopic push rod (81), and the automatic snap-fit ​​mechanism (83) is provided in two sets, which are symmetrically distributed on both sides of the elastic support.

5. A BPMA sample production apparatus according to claim 4, wherein, The elastic support includes a support collar (84) and a compressible support spring (85). The support collar (84) is sleeved on the top of the telescopic end of the electric telescopic rod (81), and the bottom of the support collar (84) is also connected to the telescopic end of the electric telescopic rod (81) through the support spring (85).

6. A BPMA sample production apparatus according to claim 4, wherein, Each of the automatic snap-fit ​​mechanisms (83) includes a pressing block (831) and a connecting sleeve (838). The bottom of the pressing block (831) is fixedly connected to a slide (837). The connecting sleeve (838) is connected to an elastic support. The slide (837) slides laterally through the connecting sleeve (838). A limit spring (839) is also connected between the slide (837) and the connecting sleeve (838). The pressing block (831) has a first pressing slope (832) that cooperates with the conical convex ring (625) on the side near the electric telescopic top rod (81).

7. A BPMA sample production apparatus according to claim 6, wherein, The auxiliary top core includes a top plate (626) and an extension top rod (627). The top plate (626) is fitted on the top of the plug tube (624). The extension top rod (627) is vertically fixed to the bottom of the top plate (626), and a limiting guide sleeve is fixedly connected to the inner side of the plug tube (624) near the top. The extension top rod (627) slides through the limiting guide sleeve.

8. A BPMA sample production apparatus according to claim 7, wherein, The top plate (626) is an elastic metal plate, and elastic metal sheets (628) are integrally fixed on both sides of the top plate (626). The bottom of the elastic metal sheet (628) extends out from the side of the plug-in cylinder (624). The upper side of the end of the extrusion block (831) near the electric telescopic rod (81) is fixedly connected to a spherical protrusion (8311) that cooperates with the elastic metal sheet (628).

9. A BPMA sample production apparatus according to claim 6, wherein, Each set of automatic snap-fit ​​mechanisms (83) further includes a cap-removing and pushing mechanism. The cap-removing and pushing mechanism includes a rotating push plate (836), a gear (8361), a rack (8362), a limiting inclined block (834), and a receiving container. The rotating push plate (836) is rotatably connected to the extrusion block (831) on one side. The gear (8361) is coaxially fixedly connected to the side of the rotating push plate (836) rotatably connected to the extrusion block (831). The rack (8362) meshes with one side of the gear (8361) and is fixedly connected to the connecting sleeve (838). A second extrusion inclined surface (833) is provided below the end of the extrusion block (831) away from the electric telescopic push rod (81). The limiting inclined block (834) is located below the second extrusion inclined surface (833). The receiving container is used to catch the detachable bottom cover pushed down by the rotating push plate (836).

10. A method for preparing a BPMA sample, implemented using a BPMA sample preparation apparatus according to any one of claims 1 to 9, characterized in that, The specific steps are as follows: Step 1: Place the molding mold (62) containing mineral powder on the rotating mold table (6); The second step is to use a media feeder (7) to feed the media powder used to assist in sample curing into the molding die (62) at the set position; The third step is to use a stirrer (9) to stir the powder inside the molding die (62) after the medium powder has been added, and to heat it simultaneously. Step 3: Let it cool and stand still; Fourth step: The solidified sample in the mold (62) after being cooled and left to stand is ejected by the demolding mechanism (8) and picked up by the lifting robot (3); The fifth step is to polish the solidified sample grabbed by the lifting manipulator (3) through setting the grinding and polishing device (2) to get the shaped sample to be measured.

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