A powder sample pressing and molding device

Abstract

The present invention belongs to the technical field of powder sample molding equipment, and in particular, relates to a powder sample pressing and molding device, including a frame-type support seat, the upper surface of the frame-type support seat is fixedly connected to a first U-shaped frame, the upper surface of the first U-shaped frame is fixedly connected to a second U-shaped frame, the upper surface of the first U-shaped frame is provided with a through hole, and the hole wall of the through hole is movably connected to a powder barrel, and the top of the powder barrel is threadedly connected to a sealing cover. The present invention enables the powder sample pressing and molding device to not only have the functions of automatic weighing, automatic transportation and improving the density of the powder sample before pressing and molding, but also has the functions of convenient material removal and automatic application of separation liquid in the pressing and molding cylinder after the powder sample is pressed and molded, and ensures the accuracy of the test results after the powder sample is pressed and molded, which can not only improve the convenience and efficiency of the powder sample pressing and molding, but also reduce the labor intensity of the staff.

Description

Technical Field

[0001] The invention belongs to the technical field of powder sample molding equipment, and in particular relates to a powder sample pressing and molding device. Background Art

[0002] There are important purposes for pressing in the powder sample pressing and molding test. First, it is convenient for subsequent testing operations and can make the sample size specifications uniform, such as meeting the sample shape and size requirements of X-ray diffraction and hardness testing, and enhancing stability to avoid loose powder from scattering and deformation during the test process. Second, it improves the physical properties of the sample, increases the sample density, optimizes the performance of the powder sample, and helps to accurately reflect the mechanical behavior of the material in practical applications. For example, the patent authorization announcement number is CN219977933U, which discloses a powder sample pressing and molding device.

[0003] At present, there are the following problems in the process of powder sample pressing and molding:

[0004] It is necessary to weigh the rated amount of powder samples manually, and then manually transfer the weighed powder samples into the molding cavity of the pressing device. In addition, it is also necessary to manually pre-press the powder samples when they enter the molding cavity of the pressing device, so as to transfer all the loose powder samples into the molding cavity of the pressing device, and avoid that some powder samples are spilled outside the molding cavity of the pressing device, thereby causing the powder samples to be inaccurately weighed after being pressed and formed, which can easily affect the accuracy of the test results after the powder samples are pressed and formed. In addition, the manual operation amount of this process is large, which affects the convenience and efficiency of the pressing and forming of the powder samples.

[0005] Before transferring the weighed powder sample into the molding cavity, the staff needs to apply a release agent on the inner wall of the molding cavity to form an isolation layer inside the molding cavity to facilitate demolding of the powder sample after molding and prevent the sample from being damaged due to adhesion to the inner wall during demolding. However, this undoubtedly increases the labor intensity of the staff and also has a negative impact on the convenience and efficiency of powder sample pressing and molding.

[0006] To this end, we propose a powder sample pressing and molding device to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a powder sample pressing and molding device in view of the above problems.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a powder sample pressing and molding device, comprising a frame-type support seat, a first U-shaped frame is fixedly connected to the upper surface of the frame-type support seat, a second U-shaped frame is fixedly connected to the upper surface of the first U-shaped frame, a through hole is opened on the upper surface of the first U-shaped frame, and a powder barrel is movably connected to the hole wall of the through hole, a sealing cover is threadedly connected to the top end of the powder barrel, a first electric push rod is fixedly embedded in the top end of the second U-shaped frame, the bottom end of the first electric push rod is fixedly connected to the upper surface of the sealing cover, the bottom end of the powder barrel is fixedly connected to an electric butterfly valve, and the bottom end of the powder barrel is fixedly sleeved with a powder sample quantitative mechanism;

[0009] A through hole is formed on the upper surface of the frame-type support seat, and a material guide ring is fixedly connected to the hole wall of the through hole, a pressing and forming cylinder is fixedly connected to the bottom end of the material guide ring, and a density improvement mechanism is fixedly connected to the inner wall of the frame-type support seat;

[0010] The inner wall of the bottom end of the frame-type support seat is fixedly connected with a PLC controller.

[0011] In the above-mentioned powder sample pressing and molding device, the powder sample quantification mechanism includes a connecting ring fixedly sleeved with the outer wall of the bottom end of the powder barrel, the lower surface of the connecting ring is fixedly connected with a telescopic pressure sensor and a telescopic rod, the telescopic pressure sensor and the bottom end of the telescopic rod are jointly fixedly connected with a quantitative cylinder, the top inner wall of the quantitative cylinder is sealingly and movably sleeved with the bottom outer wall of the electric butterfly valve, the rod wall of the telescopic rod is sleeved with a spring, the two ends of the spring are respectively fixedly connected with the outer walls of the quantitative cylinder and the connecting ring, the outer wall of the quantitative cylinder is fixedly connected with an L-shaped plate, the bottom end of the L-shaped plate is fixedly embedded with a second electric push rod, the moving end of the second electric push rod is fixedly connected with an L-shaped gate plate, the top outer wall of the L-shaped gate plate is in contact with the bottom end of the quantitative cylinder, and the bottom end of the L-shaped gate plate is fixedly connected with an extrusion platform.

[0012] In the above-mentioned powder sample pressing and molding device, two symmetrically distributed push rods are fixedly connected to the lower surface of the connecting ring, a through hole is opened on the side wall of the L-shaped gate plate, and a guide rod is movably connected to the hole wall of the through hole, and the two ends of the guide rod are respectively fixedly connected to the outer wall of the L-shaped gate plate and the quantitative cylinder.

[0013] In the above-mentioned powder sample pressing and molding device, the density improvement mechanism includes a rotating rod, the top end of the rotating rod is connected to the top inner wall of the frame support seat through a sealed bearing, the bottom end of the rotating rod is fixedly connected to a turntable, the bottom end of the turntable is in sealing contact with the bottom end of the molding pressing cylinder, the top inner wall of the frame support seat is fixedly connected to a driving assembly, the upper surface of the turntable is provided with two symmetrically distributed circular holes and countersunk holes, and the hole wall of the circular hole is fixedly connected to a ceramic air-permeable plate, the hole wall of the countersunk hole is sealed and movably connected to a moving ring, and the moving ring The inner wall of the turntable is movably connected with a hollow disk, the side end of the hollow disk is fixedly connected with a plurality of liquid spray nozzles, the bottom end of the hollow disk is fixedly connected with a connecting pipe, the lower surface of the turntable is fixedly connected with an L-shaped fixing plate, the bottom end of the L-shaped fixing plate passes through and is fixedly connected with a third electric push rod, the top of the third electric push rod is fixedly connected to the bottom end of the connecting pipe, the bottom end of the movable ring is fixedly connected with two elastic ropes, the bottom end of the elastic rope is fixedly connected to the raised outer wall of the connecting pipe, and the lower surface of the turntable located at the ceramic air permeable plate is fixedly connected with a lubricant supply assembly.

[0014] In the above-mentioned powder sample pressing and molding device, the upper surfaces of the ceramic air permeable plate, the movable ring and the hollow disk are all on the same horizontal plane as the upper surface of the rotating disk.

[0015] In the above-mentioned powder sample pressing and molding device, the driving assembly includes a connecting frame fixedly connected to the inner wall of the frame support seat, a servo motor is fixedly embedded in the connecting frame, the output end of the servo motor is fixedly connected to the first gear, and the rod wall of the rotating rod is fixedly sleeved with a second gear meshing with the outer wall of the first gear.

[0016] In the above-mentioned powder sample pressing and molding device, the lubricant supply assembly includes a liquid storage cylinder fixedly connected to the lower surface of the turntable, the inner wall of the liquid storage cylinder is sealed and movably connected with a sealing ring, the inner wall of the sealing ring is fixedly connected with a support block, the upper surface of the support block is fixedly connected with a micro air pump, the suction end of the micro air pump is fixedly connected with a hose, the top of the hose is fixedly connected with an air intake check valve, the outer wall of the air intake check valve is fixedly sleeved with a partition, the side wall of the partition is fixedly connected to the inner wall of the liquid storage cylinder, the upper surface of the partition is in contact with the lower surface of the ceramic air permeable plate, an L-shaped conduit is provided below the center of the turntable, the side end of the L-shaped conduit is fixedly connected to the outer wall of the bottom end of the liquid storage cylinder, the top of the L-shaped conduit is fixedly connected with a normally closed solenoid valve, the liquid outlet end of the normally closed solenoid valve is fixedly connected with a delivery pipe, the liquid outlet end of the delivery pipe is fixedly connected to the pipe wall of the connecting pipe, and the bottom end of the L-shaped conduit is fixedly connected with a liquid replenishment check valve.

[0017] In the above-mentioned powder sample pressing and molding device, an exhaust hole for exhausting the micro air pump is opened on the top outer wall of the liquid storage cylinder, and an F-shaped limit rod is movably connected to the side end of the turntable, and the top end of the F-shaped limit rod is fixedly connected to the inner wall of the frame support seat.

[0018] Compared with the existing technology, the advantages of a powder sample pressing and molding device are:

[0019] 1. Through the set powder sample quantitative mechanism, when the powder sample needs to be pressed into a standard test sample, the powder sample in the powder barrel is first controlled by the powder sample quantitative mechanism to be injected into the quantitative cylinder, and is measured in real time by the telescopic pressure sensor. If the telescopic pressure sensor detects that the weight of the powder sample in the quantitative cylinder reaches the weight threshold required for the powder sample to be pressed and molded, the PLC controller promptly controls the electric butterfly valve to close, and automatically weighs the amount of powder sample required for pressing and molding. This mechanism enables the powder sample pressing and molding device to have the function of automatic weighing of powder samples, which can effectively reduce the labor intensity of the staff and improve the convenience and efficiency of powder sample pressing and molding.

[0020] 2. Through the density improvement mechanism, when the quantitative cylinder completes the quantitative weighing of the powder sample, the L-shaped gate at the bottom of the quantitative cylinder is opened, and the density improvement mechanism is started, and the micro air pump forms a negative pressure environment at the guide ring and the pressing cylinder. The negative pressure environment can not only prevent the powder sample being transported from drifting, but also improve the density of the powder sample in the pressing cylinder, and there is no need for the staff to manually pre-press the powder sample in the pressing cylinder, which saves time and effort. Finally, the first electric push rod pushes the extrusion table to extrude and shape the powder sample inside the pressing cylinder. This mechanism enables the powder sample pressing and molding device to have the ability to automatically transport and improve the density of the powder sample before pressing and molding, and ensures the accuracy of the test results after the powder sample is pressed and molded, which can effectively reduce the labor intensity of the staff and improve the convenience and efficiency of the powder sample pressing and molding.

[0021] 3. Through the provided liquid storage cylinder, normally closed solenoid valve, hollow disk and liquid spray nozzle, when the powder sample needs to be taken after being pressed and formed, first rotate the turntable 180 degrees, transfer the moving ring and the hollow disk to the bottom of the pressing and forming cylinder, and then push the hollow disk up through the third electric push rod and the connecting pipe, and the hollow disk pushes the formed powder sample to expose the formed powder sample for easy taking. Then, after the pressed and formed powder sample is taken out, the PLC controller controls the moving end of the third electric push rod to move downward, and the moving ring and the hollow disk are kept dislocated and moved downward through the elastic rope, and the PLC controller also controls the normally closed solenoid valve to open at this time, and the demolding liquid in the liquid storage cylinder can be evenly sprayed on the inner wall of the pressing and forming cylinder through the liquid spray nozzle, so that the demolding liquid can form a pressing isolation layer in the pressing and forming cylinder, and facilitate the pressed and formed powder sample to be conveniently, safely and stably separated from the pressing and forming cylinder, and ensure the accuracy of the detection result of the pressed and formed powder sample, which can not only improve the convenience and efficiency of the pressing and forming of the powder sample, but also reduce the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a powder sample pressing and molding device provided by the present invention;

[0023] Figure 2 It is a schematic structural diagram of a powder sample quantitative mechanism in a powder sample pressing and molding device provided by the present invention;

[0024] Figure 3 It is a structural schematic diagram of a density improvement mechanism in a powder sample pressing and molding device provided by the present invention;

[0025] Figure 4 It is a structural schematic diagram of a turntable part in a powder sample pressing and molding device provided by the present invention;

[0026] Figure 5 It is a schematic structural diagram of a supporting block part in a powder sample pressing and molding device provided by the present invention;

[0027] Figure 6 It is a schematic structural diagram of a hollow disk portion in a powder sample pressing and molding device provided by the present invention;

[0028] Figure 7 It is a structural schematic diagram of an extrusion platform part in a powder sample pressing and molding device provided by the present invention;

[0029] Figure 8 It is a structural schematic diagram of the first U-shaped frame part in a powder sample pressing and molding device provided by the present invention;

[0030] Fig. 9It is a structural schematic diagram of an elastic rope part in a powder sample pressing and molding device provided by the present invention.

[0031] In the figure: 1 frame support seat, 2 first U-shaped frame, 3 second U-shaped frame, 4 powder barrel, 5 sealing cover, 6 powder sample quantitative mechanism, 61 connecting ring, 62 telescopic pressure sensor, 63 telescopic rod, 64 quantitative barrel, 65 spring, 66 L-shaped plate, 67 second electric push rod, 68 L-shaped gate plate, 69 extrusion table, 7 density lifting mechanism, 71 rotating rod, 72 rotating disk, 73 ceramic breathable plate, 74 moving ring, 75 hollow disk, 76 liquid spray nozzle, 77 connecting pipe, 78 L-shaped fixed plate, 79 third electric push rod, 710 elastic rope, 8 driving assembly, 81 connecting frame, 82 servo motor, 83 first gear, 84 second gear, 9 lubricant supply assembly, 91 liquid storage cylinder, 92 sealing ring, 93 support block, 94 micro air pump, 95 hose, 96 air intake check valve, 97 partition, 98 L-shaped conduit, 99 normally closed solenoid valve, 910 delivery pipe, 911 liquid replenishment check valve, 10 first electric push rod, 11 electric butterfly valve, 12 guide ring, 13 pressing molding cylinder, 14 PLC controller, 15 push rod, 16 guide rod, 17 countersunk hole, 18 exhaust hole, 19 F-shaped limit rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-Figure 9As shown, a powder sample pressing and molding device comprises a frame-type support seat 1, a first U-shaped frame 2 is fixedly connected to the upper surface of the frame-type support seat 1, a second U-shaped frame 3 is fixedly connected to the upper surface of the first U-shaped frame 2, a through hole is opened on the upper surface of the first U-shaped frame 2, and a powder barrel 4 is movably connected to the hole wall of the through hole, a sealing cover 5 is threadedly connected to the top end of the powder barrel 4, a first electric push rod 10 is fixedly embedded in the top end of the second U-shaped frame 3, the bottom end of the first electric push rod 10 is fixedly connected to the upper surface of the sealing cover 5, the bottom end of the powder barrel 4 is fixedly connected to an electric butterfly valve 11, a powder sample quantitative mechanism 6 is fixedly sleeved at the bottom end of the powder barrel 4, the powder sample quantitative mechanism 6 comprises a connecting ring 61 fixedly sleeved to the outer wall of the bottom end of the powder barrel 4, a telescopic pressure sensor 62 and a telescopic rod 63 are fixedly connected to the lower surface of the connecting ring 61, a quantitative cylinder 64 is fixedly connected to the bottom ends of the telescopic pressure sensor 62 and the telescopic rod 63, and a quantitative cylinder 64 is fixedly connected to the inner wall of the top end of the quantitative cylinder 64 and the electric butterfly valve 11. The outer wall of the bottom end of the valve 11 is sealed and movably sleeved, and the rod wall of the telescopic rod 63 is sleeved with a spring 65. The two ends of the spring 65 are respectively fixedly connected to the outer walls of the quantitative cylinder 64 and the connecting ring 61. The outer wall of the quantitative cylinder 64 is fixedly connected with an L-shaped plate 66. The bottom end of the L-shaped plate 66 is fixedly embedded with a second electric push rod 67. The movable end of the second electric push rod 67 is fixedly connected with an L-shaped gate plate 68. The lower surface of the connecting ring 61 is fixedly connected with two symmetrically distributed push rods 15. The side wall of the L-shaped gate plate 68 is provided with a through hole, and the hole wall of the through hole is movably connected with a guide rod 16. The two ends of the guide rod 16 are respectively fixedly connected to the L-shaped gate plate 68 and the outer wall of the quantitative cylinder 64. The top outer wall of the L-shaped gate plate 68 contacts the bottom end of the quantitative cylinder 64. The bottom end of the L-shaped gate plate 68 is fixedly connected with an extrusion platform 69. This mechanism enables the powder sample pressing and molding device to have the function of automatic weighing of powder samples, which can effectively reduce the labor intensity of the staff and improve the convenience and efficiency of powder sample pressing and molding.

[0034] A PLC controller 14 is fixedly connected to the inner wall of the bottom end of the frame support seat 1, a through hole is opened on the upper surface of the frame support seat 1, and a guide ring 12 is fixedly connected to the hole wall of the through hole, and a pressing and forming cylinder 13 is fixedly connected to the bottom end of the guide ring 12, and a density improving mechanism 7 is fixedly connected to the inner wall of the frame support seat 1, and the density improving mechanism 7 includes a rotating rod 71, and the top of the rotating rod 71 is connected to the inner wall of the top end of the frame support seat 1 through a sealed bearing, and the bottom end of the rotating rod 71 is fixedly connected to a turntable 72, and the bottom end of the turntable 72 is in sealing contact with the bottom end of the forming and pressing cylinder, and a driving assembly 8 is fixedly connected to the inner wall of the top end of the frame support seat 1. The driving assembly 8 includes a connecting frame 81 fixedly connected to the inner wall of the frame support seat 1, and a servo motor 82 is fixedly embedded in the connecting frame 81, and the output end of the servo motor 82 is fixedly connected to a first gear 83, and the rod wall of the rotating rod 71 is fixedly sleeved with a second gear 84 meshing with the outer wall of the first gear 83.

[0035] The upper surface of the turntable 72 is provided with two symmetrically distributed circular holes and countersunk holes 17, and the hole walls of the circular holes are fixedly connected with ceramic air-permeable plates 73, the hole walls of the countersunk holes 17 are sealed and movably connected with movable rings 74, the inner wall of the movable ring 74 is movably connected with hollow disks 75, the upper surfaces of the ceramic air-permeable plates 73, movable rings 74 and hollow disks 75 are all in the same horizontal plane with the upper surface of the turntable 72, the side ends of the hollow disks 75 are fixedly connected with a plurality of liquid spray nozzles 76, the bottom end of the hollow disks 75 is fixedly connected with a connecting pipe 77, the lower surface of the turntable 72 is fixedly connected with an L-shaped fixing plate 78, the bottom end of the L-shaped fixing plate 78 is penetrated and fixedly connected with a third electric push rod 79, the top end of the third electric push rod 79 is fixedly connected to the bottom end of the connecting pipe 77, the bottom end of the movable ring 74 is fixedly connected with two elastic ropes 710, and the bottom ends of the elastic ropes 710 are fixedly connected to the raised outer wall of the connecting pipe 77.

[0036] The lower surface of the turntable 72 located at the ceramic air-permeable plate 73 is fixedly connected with a lubricant supply assembly 9, and the lubricant supply assembly 9 includes a liquid storage cylinder 91 fixedly connected to the lower surface of the turntable 72, and the outer wall of the top end of the liquid storage cylinder 91 is provided with an exhaust hole 18 for exhausting the air from the micro air pump 94, and the side end of the turntable 72 is movably connected with an F-shaped limit rod 19, and the top end of the F-shaped limit rod 19 is fixedly connected to the inner wall of the frame support seat 1, and the inner wall of the liquid storage cylinder 91 is sealed and movably connected with a sealing ring 92, and the inner wall of the sealing ring 92 is fixedly connected with a support block 93, and the upper surface of the support block 93 is fixedly connected with a micro air pump 94, and the suction end of the micro air pump 94 is fixedly connected with a hose 95, and the top end of the hose 95 is fixedly connected with an air intake check valve 96, and the outer wall of the air intake check valve 96 is fixedly sleeved with a partition plate 97, and the side wall of the partition plate 97 is connected to the liquid storage cylinder 91. The inner wall of the turntable 72 is fixedly connected, the upper surface of the partition 97 is in contact with the lower surface of the ceramic air permeable plate 73, and an L-shaped conduit 98 is provided below the center of the turntable 72. The side end of the L-shaped conduit 98 is fixedly connected to the outer wall of the bottom end of the liquid storage cylinder 91, and the top of the L-shaped conduit 98 is fixedly connected to a normally closed solenoid valve 99, and the liquid outlet end of the normally closed solenoid valve 99 is fixedly connected to a delivery pipe 910, and the liquid outlet end of the delivery pipe 910 is fixedly connected to the tube wall of the connecting pipe 77, and the bottom end of the L-shaped conduit 98 is fixedly connected to a liquid replenishment one-way valve 911. This mechanism enables the powder sample pressing and molding device to have the ability to automatically transport and improve the density of the powder sample before pressing and molding, and ensures the accuracy of the test results after the powder sample is pressed and molded, which can effectively reduce the labor intensity of the staff and improve the convenience and efficiency of the powder sample pressing and molding.

[0037] The telescopic pressure sensor 62 is electrically connected to the input end of the PLC controller 14 through a wire, and the second electric push rod 67, the third electric push rod 79, the servo motor 82, the micro air pump 94, the normally closed solenoid valve 99, the first electric push rod 10 and the electric butterfly valve 11 are all electrically connected to the output end of the PLC controller 14 through a wire. The above-mentioned power-on devices and electrical connections are all prior arts and are well known to those skilled in the art, and will not be repeated here.

[0038] The operating principle of the present invention is now described as follows: when the powder sample needs to be pressed into a standard test sample, the PLC controller 14 first rotates the hollow disk 75 on the turntable 72 to just below the pressing and forming cylinder 13 through the servo motor 82, and then the PLC controller 14 controls the moving end of the third electric push rod 79 to move upward. After the moving end of the third electric push rod 79 rises to the top, the PLC controller 14 controls the moving end of the third electric push rod 79 to move downward, and the moving end of the third electric push rod 79 drives the connecting tube 77 to move downward. The connecting tube 77 will pull the elastic rope 710 during the downward movement. The moving ring 74 can keep the displacement downward with the hollow disk 75 under the action of the restoring force of the elastic rope 710, and the PLC controller 14 also controls the normally closed electric push rod 79 at this time. The magnetic valve 99 is opened, and after the normally closed electromagnetic valve 99 is opened, the demoulding liquid in the liquid storage cylinder 91 enters the hollow disk 75 through the normally closed electromagnetic valve 99, the delivery pipe 910 and the connecting pipe 77 under the gravity extrusion of the micro air pump 94 and the support block 93, and finally the movable ring 74 and the hollow disk 75 are both retracted into the counterbore 17, and the hollow disk 75 can spray the demoulding liquid evenly on the inner wall of the pressing and molding cylinder 13 through the liquid spray nozzle 76, so that the demoulding liquid can form a thin pressing isolation layer in the pressing and molding cylinder 13, and facilitate the pressed powder sample to be conveniently, safely and stably separated from the pressing and molding cylinder 13, and finally the PLC controller 14 rotates the ceramic air permeable plate 73 on the turntable 72 to the bottom of the pressing and molding cylinder 13 for standby use through the servo motor 82;

[0039] Then, a sufficient amount of powder sample is poured into the powder barrel 4, and the powder barrel 4 is passed through the first U-shaped frame 2, and then the powder barrel 4 is screwed into the sealing cover 5 for connection, and then the PLC controller 14 controls the moving end of the second electric push rod 67 to fully extend within 1 second, so that the L-shaped gate plate 68 seals the bottom of the quantitative barrel 64, and after 1 second, the PLC controller 14 controls the electric butterfly valve 11 to open, so that the powder sample inside the powder barrel 4 automatically falls into the quantitative barrel 64 sealed by the L-shaped gate plate 68;

[0040] As the amount of powder sample in the quantitative cylinder 64 increases, the weight of the quantitative cylinder 64 increases accordingly, and the quantitative cylinder 64 moves downward accordingly, driving the telescopic pressure sensor 62, the telescopic rod 63 and the spring 65 to extend. The extension of the spring 65 generates a restoring force, which enables the quantitative cylinder 64 to rise and reset after the powder sample in the quantitative cylinder 64 is discharged. During the extension process of the telescopic pressure sensor 62 being pulled, the weight of the powder sample in the quantitative cylinder 64 is detected in real time, and then the weight of the powder sample is converted into an electrical signal and transmitted to the PLC controller 14. If the telescopic pressure sensor 62 detects that the weight of the powder sample in the quantitative cylinder 64 reaches the weight threshold preset by the PLC controller 14, the PLC controller 14 will 14 timely controls the electric butterfly valve 11 to close. The weight threshold preset by the PLC controller 14 is 95% of the powder sample amount required for the powder sample to be pressed and molded, and the remaining 5% of the required powder sample amount is compensated by the unweighed powder sample suspended at the top of the quantitative cylinder 64. The unweighed powder sample is located at the discharge port of the electric butterfly valve 11 when the electric butterfly valve 11 is closed, and has not accumulated in the quantitative cylinder 64. Finally, the weighed quantity of the powder sample in the quantitative cylinder 64 meets the error requirement, and the interference of the powder sample suspended at the bottom of the discharge port of the electric butterfly valve 11 on the weighing accuracy can be avoided, so that the automatic weighing of the required amount of the powder sample for pressing and molding can be completed, saving time and effort.

[0041] While the quantitative cylinder 64 completes the quantitative weighing of the powder sample, the PLC controller 14 also controls the micro air pump 94 and the second electric push rod 67 to work for 15 seconds. In the first second of the 15 seconds, the moving end of the second electric push rod 67 is completely retracted, and at the same time, the second electric push rod 67 drives the L-shaped gate plate 68 to move outward, so that the bottom discharge port of the quantitative cylinder 64 is exposed, and at the same time, the L-shaped gate plate 68 is in sealing contact with the quantitative cylinder 64. During the outward movement of the L-shaped gate plate 68, the powder sample attached to the surface of the L-shaped gate plate 68 is scraped off and retained by the inner wall of the bottom end of the quantitative cylinder 64, and enters the pressing and molding cylinder 13 together with the powder sample inside the quantitative cylinder 64. After that, within 14 seconds, the powder sample in the quantitative cylinder 64 can be conveniently dropped to the guide ring 12 and the pressing and molding cylinder 13. Within 15 seconds after the micro air pump 94 is powered on, the air is passed through the air inlet check valve 96, The ceramic air permeable plate 73, the partition plate 97 and the hose 95 suck the air inside the guide ring 12 and the pressing and forming cylinder 13. There are a number of tiny air holes on the ceramic air permeable plate 73, so that the ceramic air permeable plate 73 can be ventilated while preventing the powder sample from passing through the ceramic air permeable plate 73 and escaping from the pressing and forming cylinder 13, so that the weighed powder sample can be completely transferred to the inside of the pressing and forming cylinder 13, and at the same time, a negative pressure environment is formed in the guide ring 12 and the pressing and forming cylinder 13, and the negative pressure environment can guide the powder sample discharged from the quantitative cylinder 64 to prevent the powder sample from floating, and the continuous negative pressure environment can prevent large gaps between the powder samples entering the pressing and forming cylinder 13, so that the powder sample in the pressing and forming cylinder 13 is more compact, and there is no need for the staff to manually pre-press the powder sample in the pressing and forming cylinder 13, saving time and effort;

[0042] After 15 seconds, the PLC controller 14 controls the micro air pump 94 to cut off the power and stop pumping. At the same time, the PLC controller 14 also controls the first electric push rod 10 and the second electric push rod 67 to work. The moving end of the second electric push rod 67 pushes the L-shaped gate plate 68 to seal and close the bottom of the quantitative cylinder 64. At this time, the center of the L-shaped gate plate 68 is on the same vertical line as the center of the pressing and molding cylinder 13. When the moving end of the first electric push rod 10 extends, it will push the sealing cover 5, the powder barrel 4 and the extrusion platform 69 to move downward, and during the downward movement of the extrusion platform 69, the bottom end of the extrusion platform 69 is in active sealing contact with the inner wall of the pressing and molding cylinder 13. At the same time, the extrusion platform 69 can perform pressing and molding processing on the powder sample in the pressing and molding cylinder 13. This mechanism enables the powder sample pressing and molding device to not only have the function of automatic weighing of the powder sample, but also has the ability to automatically transport and improve the density of the powder sample before pressing and molding, and ensures the accuracy of the test results after the powder sample is pressed and molded, which can effectively reduce the labor intensity of the staff and improve the convenience and efficiency of the powder sample pressing and molding.

[0043] When the powder sample needs to be taken out after being pressed and formed, the PLC controller 14 first controls the output end of the servo motor 82 to rotate, and the output end of the servo motor 82 rotates the rotating rod 71 180 degrees through the first gear 83 and the second gear 84, and realizes the rotation of the turntable 72 180 degrees, and then the moving ring 74 and the hollow disk 75 are transported to the bottom of the pressing and forming cylinder 13, and the outer wall of the moving ring 74 and the inner wall of the pressing and forming cylinder 13 are in the same vertical annular surface, and then the PLC controller 14 controls the moving end of the third electric push rod 79 to move upward, and the third electric push rod The hollow disk 75 is pushed by the connecting tube 77, and the hollow disk 75 can push the powder sample formed in the pressing and molding cylinder 13 to move upward, and the moving ring 74 is pushed by the protrusion of the connecting ring 61 to move upward along the inner wall of the pressing and molding cylinder 13, so that the formed powder sample is exposed and convenient to take out. Moreover, after the powder sample is pressed and molded, due to the close combination between the powder sample particles and the formation of an overall structure, the powder sample is not easy to collapse when it is taken out after being pressed and molded. After the pressed and molded powder sample is taken out, the PLC controller 14 controls the moving end of the third electric push rod 79 to move downward, and the third electric push rod 79 moves downward. The movable end of the push rod 79 drives the connecting tube 77 to move downward, and the connecting tube 77 will pull the elastic rope 710 during the downward movement. The movable ring 74 can keep the offset downward movement with the hollow disk 75 under the action of the restoring force of the elastic rope 710, and the PLC controller 14 also controls the normally closed solenoid valve 99 to open at this time. After the normally closed solenoid valve 99 is opened, the demoulding liquid in the liquid storage cylinder 91 enters the hollow disk 75 through the normally closed solenoid valve 99, the delivery tube 910 and the connecting tube 77 under the gravity extrusion of the micro air pump 94 and the support block 93. Finally, the movable ring 74 and the hollow disk 75 are both retracted into the countersunk hole 17, and the hollow disk 75 is When the mold release liquid is pressed, the mold release liquid can be evenly sprayed on the inner wall of the pressing cylinder 13 through the liquid spray nozzle 76, so that the mold release liquid can form a pressing isolation layer in the pressing cylinder 13, and facilitate the pressed powder sample to be conveniently, safely and stably separated from the pressing cylinder 13, and ensure the accuracy of the detection results of the pressed powder sample. This mechanism enables the powder sample pressing and molding device to have the functions of convenient material collection after the powder sample is pressed and molded and automatic application of the release liquid in the pressing cylinder 13, which can not only improve the convenience and efficiency of the powder sample pressing and molding, but also reduce the labor intensity of the staff.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A powder sample pressing and molding device, comprising a frame-type support seat (1), characterized in that: The upper surface of the frame support seat (1) is fixedly connected to a first U-shaped frame (2), the upper surface of the first U-shaped frame (2) is fixedly connected to a second U-shaped frame (3), the upper surface of the first U-shaped frame (2) is provided with a through hole, and the hole wall of the through hole is movably connected to a powder barrel (4), the top end of the powder barrel (4) is threadedly connected to a sealing cover (5), the top end of the second U-shaped frame (3) is fixedly embedded with a first electric push rod (10), the bottom end of the first electric push rod (10) is fixedly connected to the upper surface of the sealing cover (5), the bottom end of the powder barrel (4) is fixedly connected to an electric butterfly valve (11), and the bottom end of the powder barrel (4) is fixedly sleeved with a powder sample quantitative mechanism (6); A through hole is formed on the upper surface of the frame-type support seat (1), and a material guide ring (12) is fixedly connected to the hole wall of the through hole, a pressing and forming cylinder (13) is fixedly connected to the bottom end of the material guide ring (12), and a density improving mechanism (7) is fixedly connected to the inner wall of the frame-type support seat (1); A PLC controller (14) is fixedly connected to the inner wall of the bottom end of the frame-type support seat (1); The powder sample quantitative mechanism (6) comprises a connecting ring (61) fixedly sleeved with the outer wall of the bottom end of the powder barrel (4); a telescopic pressure sensor (62) and a telescopic rod (63) are fixedly connected to the lower surface of the connecting ring (61); the bottom ends of the telescopic pressure sensor (62) and the telescopic rod (63) are fixedly connected to a quantitative barrel (64); the top inner wall of the quantitative barrel (64) is sealingly sleeved with the outer wall of the bottom end of the electric butterfly valve (11); and the rod wall of the telescopic rod (63) is sleeved with a spring (65). , the two ends of the spring (65) are respectively fixedly connected to the outer walls of the quantitative cylinder (64) and the connecting ring (61); the outer wall of the quantitative cylinder (64) is fixedly connected to an L-shaped plate (66); a second electric push rod (67) is fixedly embedded at the bottom end of the L-shaped plate (66); the movable end of the second electric push rod (67) is fixedly connected to an L-shaped gate plate (68); the outer wall of the top end of the L-shaped gate plate (68) contacts the bottom end of the quantitative cylinder (64); and the bottom end of the L-shaped gate plate (68) is fixedly connected to an extrusion platform (69); The density improving mechanism (7) comprises a rotating rod (71), the top end of the rotating rod (71) is connected to the top inner wall of the frame support seat (1) via a sealed bearing, the bottom end of the rotating rod (71) is fixedly connected to a rotating disk (72), the bottom end of the rotating disk (72) is in sealing contact with the bottom end of the forming pressing cylinder, the top inner wall of the frame support seat (1) is fixedly connected to a driving assembly (8), the upper surface of the rotating disk (72) is provided with two symmetrically distributed circular holes and a countersunk hole (17), and the hole wall of the circular hole is fixedly connected to a ceramic air permeable plate (73), the hole wall of the countersunk hole (17) is sealed and movably connected to a moving ring (74), and the inner wall of the moving ring (74) is movably connected to a hollow disk (75), The side end of the hollow disk (75) is fixedly connected to a plurality of liquid spray nozzles (76), the bottom end of the hollow disk (75) is fixedly connected to a connecting tube (77), the lower surface of the rotating disk (72) is fixedly connected to an L-shaped fixing plate (78), the bottom end of the L-shaped fixing plate (78) is penetrated and fixedly connected to a third electric push rod (79), the top end of the third electric push rod (79) is fixedly connected to the bottom end of the connecting tube (77), the bottom end of the moving ring (74) is fixedly connected to two elastic ropes (710), the bottom end of the elastic rope (710) is fixedly connected to the raised outer wall of the connecting tube (77), and the lower surface of the rotating disk (72) located at the ceramic air permeable plate (73) is fixedly connected to a lubricant supply assembly (9); The lubricant supply assembly (9) comprises a liquid storage cylinder (91) fixedly connected to the lower surface of the rotating disk (72); the inner wall of the liquid storage cylinder (91) is sealingly and movably connected to a sealing ring (92); the inner wall of the sealing ring (92) is fixedly connected to a support block (93); the upper surface of the support block (93) is fixedly connected to a micro air pump (94); the suction end of the micro air pump (94) is fixedly connected to a hose (95); the top end of the hose (95) is fixedly connected to an air intake check valve (96); the outer wall of the air intake check valve (96) is fixedly sleeved with a partition (97); the side wall of the partition (97) is connected to the liquid storage cylinder (91); 1), the upper surface of the partition (97) contacts the lower surface of the ceramic air permeable plate (73), an L-shaped conduit (98) is provided below the center of the turntable (72), the side end of the L-shaped conduit (98) is fixedly connected to the outer wall of the bottom end of the liquid storage cylinder (91), the top end of the L-shaped conduit (98) is fixedly connected to a normally closed solenoid valve (99), the liquid outlet end of the normally closed solenoid valve (99) is fixedly connected to a delivery pipe (910), the liquid outlet end of the delivery pipe (910) is fixedly connected to the pipe wall of the connecting pipe (77), and the bottom end of the L-shaped conduit (98) is fixedly connected to a liquid replenishment one-way valve (911).

2. A powder sample pressing and molding device according to claim 1, characterized in that: The lower surface of the connecting ring (61) is fixedly connected to two symmetrically distributed push rods (15); a through hole is formed on the side wall of the L-shaped gate plate (68); a guide rod (16) is movably connected to the hole wall of the through hole; and two ends of the guide rod (16) are respectively fixedly connected to the outer wall of the L-shaped gate plate (68) and the metering cylinder (64).

3. A powder sample pressing and molding device according to claim 1, characterized in that: The upper surfaces of the ceramic air-permeable plate (73), the movable ring (74) and the hollow disk (75) are all located on the same horizontal plane as the upper surface of the rotating disk (72).

4. A powder sample pressing and molding device according to claim 1, characterized in that: The driving assembly (8) comprises a connecting frame (81) fixedly connected to the inner wall of the frame support seat (1), a servo motor (82) being fixedly embedded in the connecting frame (81), a first gear (83) being fixedly connected to the output end of the servo motor (82), and a second gear (84) being fixedly sleeved on the rod wall of the rotating rod (71) and meshing with the outer wall of the first gear (83).

5. The powder sample pressing and molding device according to claim 1, characterized in that: An exhaust hole (18) for exhausting air from a micro air pump (94) is provided on the top outer wall of the liquid storage cylinder (91), and an F-shaped limit rod (19) is movably connected to the side end of the turntable (72), and the top end of the F-shaped limit rod (19) is fixedly connected to the inner wall of the frame-type support seat (1).

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