Automatic mixing and feeding device and method for cubic boron nitride raw materials

Abstract

The invention discloses an automatic cubic boron nitride raw material mixing and feeding device and method.The feeding device comprises a first support and a second support, a rotating shaft is arranged between the first support and the second support, a material barrel used for mixing materials is arranged on the rotating shaft, and a supporting platform is arranged above the material barrel; at least two feeding devices are arranged on the supporting platform, and a feeding port used for feeding materials into the charging barrel is formed in the supporting platform. The feeding method comprises the steps that S1, main material feeding preparation is conducted, and a feeding device for conveying main materials is moved to the position over a feeding opening; s2, the charging barrel is aligned, and the charging barrel rotates until the feeding port is located under the feeding port; compared with the prior art, the mixing device has the beneficial effects that different materials are added into the charging barrel through the feeding device, then the charging barrel rotates to drive the materials in the charging barrel to rotate to be uniformly mixed, automation of the feeding and mixing process is achieved, and the mixing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of production and manufacturing of cubic boron nitride, and in particular to an automatic mixing and feeding device and method for cubic boron nitride raw materials. Background Art

[0002] Cubic boron nitride (CBN) is a new type of artificial material, which is synthesized by hexagonal boron nitride and catalyst under high temperature and high pressure. It is another new product after the advent of artificial diamond. It has high hardness, thermal stability and chemical inertness. Its hardness is second only to diamond, but its thermal stability is much higher than diamond. It has high hardness and good wear resistance, and is widely used in the mechanical processing industry.

[0003] In the synthesis process of cubic boron nitride, the raw materials such as hexagonal boron nitride and catalyst need to be dried first, mixed in a certain proportion, pre-pressed into columns, and then assembled with pyrophyllite blocks, conductive rings, carbon tubes and other components, and synthesized at high temperature and high pressure in a six-sided press. The current mixing and feeding process is mostly manual, with a low degree of automation. In the middle of the mixing process, it is necessary to manually take materials and add them to the barrel of the two-dimensional mixer for mixing. Not only is the mixing output low and the operating efficiency low, but there is also a certain amount of dust pollution, which affects the health of workers.

[0004] The patent with publication number "CN211562834U" discloses "a system for automatically feeding and proportioning multiple powders". Although the device realizes automatic feeding of powders, multiple materials are added at the same time, and the mixing mechanism is fixed, which may cause uneven mixing. Summary of the invention

[0005] The object of the present invention is to provide a device and method for automatically mixing and feeding cubic boron nitride raw materials, which realizes the automatic feeding and subsequent mixing of raw materials, and the barrel itself can rotate, thereby improving the mixing efficiency.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A device for automatically mixing and feeding cubic boron nitride raw materials comprises a first support and a second support, a rotating shaft is arranged between the first support and the second support, a barrel for mixing materials is arranged on the rotating shaft, a supporting platform is arranged above the barrel, at least two feeding devices are arranged on the supporting platform, and a feeding port for feeding materials into the barrel is opened in the supporting platform.

[0007] Preferably, the feeding device comprises a feeder that can be moved above the feeding port, and the inlet of the feeder is connected to a storage box for storing raw materials.

[0008] Preferably, the feeding device further comprises a lead screw arranged on the supporting platform, a slider is arranged on the nut pair of the lead screw, and the slider is fixedly connected to the feeding machine.

[0009] Preferably, a baffle is provided on the side wall of the sliding block, and a first limit switch and a second limit switch for limiting the baffle are also provided on the supporting platform.

[0010] Preferably, a docking device is provided in the feeding port, the docking device comprises a first docking plate connected to the feeding device and a second docking plate connected to the barrel, and a flexible connecting device is provided between the first docking plate and the second docking plate.

[0011] Preferably, a fixed plate is formed in the feeding port, a first telescopic rod for driving the first docking plate to move is arranged on one side of the fixed plate, and a second telescopic rod for driving the second docking plate to move is arranged on the other side of the fixed plate.

[0012] Preferably, the inner wall of the feeding port is provided with a third limit switch for limiting the first telescopic rod and a fourth limit switch for limiting the second telescopic rod.

[0013] Preferably, a first butt joint sleeve is provided on a side of the first butt joint plate facing the second butt joint plate, a second butt joint sleeve is provided on a side of the second butt joint plate facing the first butt joint plate, and the connecting device is located between the first butt joint sleeve and the second butt joint sleeve.

[0014] Preferably, a receiving hopper is provided below the barrel, a first laser emitter is provided at the inlet of the barrel, a first laser reflector plate cooperating with the first laser emitter is provided below the supporting platform, a second laser emitter is provided at the outlet of the barrel, and a second laser reflector plate cooperating with the second laser emitter is provided above the receiving hopper.

[0015] Preferably, the present invention also provides a method for automatically mixing and feeding cubic boron nitride raw materials, using the aforementioned feeding device, comprising the following steps: S1. Prepare the main material feeding, and move the feeding device for conveying the main material to the top of the feeding port; S2. Align the barrel and rotate it until the feed port is directly below the feeding port; S3, upper and lower docking, the docking device extends to both sides and is connected to the feeding device and the barrel for conveying the main material respectively; S4, main material feeding, the feeding device for conveying the main material is started, and the material is fed into the barrel; S5, the docking device returns to its original position, the docking device retracts, and is disconnected from the feeding device and the barrel for conveying the main material; S6, the feeding device returns to its original position, the feeding device for conveying the main material returns to its original position, and the position directly above the feeding port is vacated; S7, auxiliary material feeding preparation, the feeding device for conveying auxiliary materials moves to the top of the feeding port; S8, the first mixing, the barrel rotates to prevent the main material inside from agglomerating; S9, the second feeding, repeating the process S2-S6, after the auxiliary material is added into the barrel, the feeding device for conveying the auxiliary material returns to its position; S10, the second mixing, the barrel rotates to fully mix the main material and the auxiliary material; S11, repeat S9-S10 until all the auxiliary materials are added into the barrel and the materials in the barrel are fully mixed.

[0016] The beneficial effects of the present invention are: 1. Different materials are added into the barrel through the feeding device, and then the barrel itself rotates, driving the materials inside to rotate and mix them evenly, realizing the automation of the feeding and mixing process and improving the mixing efficiency.

[0017] 2. The movement of the feeder is controlled by a screw nut pair, making its movement process precise and controllable. When feeding, it can accurately complete the sealed docking with the docking device to avoid the powdery material from floating and affecting the working environment.

[0018] 3. A hopper is provided under the barrel to store the mixed materials, so that the barrel can continue to work and improve the mixing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention; Figure 2 A top view of the present invention; Figure 3 for Figure 1 A partial enlarged view of I.

[0020] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings. Example

[0022] like Figure 1 — Figure 3As shown, an automatic mixing and feeding device for cubic boron nitride raw materials includes a first support 34 and a second support 36, a rotating shaft 37 is arranged between the first support 34 and the second support 36, a barrel 1 for mixing is arranged on the rotating shaft 37, a supporting platform 4 is arranged above the barrel 1, three feeding devices are arranged on the supporting platform 4 (the mixed material in this embodiment requires a main material and two auxiliary materials, and in other embodiments, the number of feeding devices can be flexibly set according to different formulas of the mixed material), and a feeding port 17 for feeding into the barrel 1 is opened in the supporting platform 4. A control cabinet (power box, control panel, display panel, etc.) and a motor for controlling the rotation of the rotating shaft 37 can also be arranged in the first support 34 and / or the second support 36.

[0023] The three feeding devices have the same structure, and include a feeder 8 that can be moved to the top of the feeding port 17. The inlet of the feeder 8 is connected to a storage box (not shown in the figure) for storing raw materials. When feeding, the feeder 8 moves to the top of the feeding port 17, and moves away after the feeding is completed, without affecting the normal addition of other materials.

[0024] The feeding device further includes a lead screw 46 disposed on the support platform 4, a slider 15 is disposed on the nut pair of the lead screw 46, and the slider 15 is fixedly connected to the feeder 8. The lead screw 46 is connected to the motor 5, and the motor rotates to drive the lead screw 46 to rotate, thereby moving the nut pair, the slider 15, and the feeder 8. In other embodiments, the slider 15 can also be driven by a device with a telescopic function such as a cylinder or a hydraulic cylinder.

[0025] The side wall of the slider 15 is provided with a baffle 16, and the support platform 4 is also provided with a first limit switch 13 and a second limit switch 14 for limiting the baffle 16. When the slider 15 and the baffle 16 move to the left, the baffle 16 contacts the first limit switch 13, indicating that the feeder 8 is located at the feeding position directly above the feeding port 17. When the slider 15 and the baffle 16 move to the right, the baffle 16 contacts the second limit switch 14, indicating that the feeder 8 will not interfere with other feeding devices.

[0026] A docking device is provided in the feeding port 17, and the docking device includes a first docking plate 44 connected to the feeding device and a second docking plate 45 connected to the barrel 1, and a flexible connecting device 32 is provided between the first docking plate 44 and the second docking plate 45. The connecting device 32 needs to have a certain degree of retractability, and a dust-free cloth can be used.

[0027] A fixed plate 41 is formed in the feeding port 17. A first telescopic rod 42 for driving a first docking plate 44 is provided on one side of the fixed plate 41, and a second telescopic rod 43 for driving a second docking plate 45 is provided on the other side of the fixed plate 41. The first telescopic rod 42 and the second telescopic rod 43 are provided at two locations respectively.

[0028] The inner wall of the feeding port 17 is provided with a third limit switch 18 for limiting the first telescopic rod 42 and a fourth limit switch 19 for limiting the second telescopic rod 43. The third limit switch 18 and the fourth limit switch 19 correspond to the first telescopic rod 42 and the second telescopic rod 43 one by one and are respectively provided at two locations. The third limit switch 18 and the fourth limit switch 19 are both magnetic switches. The first telescopic rod 42 and the second telescopic rod 43 can both adopt cylinders, and a magnetic ring is installed in the cylinder. In the process of the first telescopic rod 42 moving up and the second telescopic rod 43 moving down, when the first telescopic rod 42 moves to the third limit switch 18, the magnetic ring magnetizes and closes the magnetic switch, and sends out a signal that the first telescopic rod 42 is in place. When the second telescopic rod 43 moves to the fourth limit switch 19, the magnetic ring magnetizes and closes the magnetic switch, and sends out a signal that the second telescopic rod 43 is in place. The signals of the two third limit switches 18 are electrically set to a series relationship. Only when all are in place can the docking task (docking with the feeder 8) be completed. The two fourth limit switches 19 are also in a series relationship. Only when all are in place can the docking with the barrel 1 be completed. After the docking is completed, the feeder 8 can be used to load materials into the barrel 1. The outward movement (extending to complete docking) and inward movement (retracting to disengage docking) of the first telescopic rod 42 and the second telescopic rod 43 can be controlled by a two-position five-way solenoid valve, and the valve core of the two-position five-way solenoid valve is reversed to achieve convenient changes in its movement. The reversal of the solenoid valve is an existing conventional technology and will not be described in detail in this embodiment.

[0029] A first docking sleeve 6 is provided on the side of the first docking plate 44 facing the second docking plate 45, and a second docking sleeve 7 is provided on the side of the second docking plate 45 facing the first docking plate 44. The connecting device 32 is located between the first docking sleeve 6 and the second docking sleeve 7 to avoid excessive deformation that may easily cause it to be pulled and damaged.

[0030] A receiving hopper 33 is provided below the barrel 1, a first laser emitter 2 is provided at the inlet of the barrel 1, a first laser reflector 3 cooperating with the first laser emitter 2 is provided below the support platform 4, a second laser emitter 28 is provided at the outlet of the barrel 1, and a second laser reflector 29 cooperating with the second laser emitter 28 is provided above the receiving hopper 33. The cooperation of the laser emitter and the laser reflector can detect the relative positions of the barrel 1 and the support platform 4, and the barrel 1 and the receiving hopper 33, to ensure that the materials can be smoothly transferred when discharging after loading or mixing.

[0031] In addition, this embodiment also discloses a method for automatically mixing and feeding cubic boron nitride raw materials, using the aforementioned feeding device to mix three materials (a main material and two auxiliary materials), including the following steps: S1, main material feeding preparation, the feeding device for conveying the main material moves to the top of the feeding port 17; S2, aligning the barrel. The barrel 1 rotates slowly counterclockwise from the inside to the outside at a set speed of 5-10 r / min. Through the cooperation of the first laser emitter 2 and the first laser reflection plate 3, the barrel 1 rotates until the feed port is located directly below the feeding port 17; S3, upper and lower docking, the docking device extends to both sides, respectively connected to the feeder 8 and the barrel 1 for conveying the main material, the upper end of the first docking plate 44 and the lower end of the second docking plate 45 are respectively provided with sealing pads, so that the docking is tightly sealed to prevent powder from overflowing; S4, main material feeding, the feeding device for conveying the main material is started, and the material is fed into the barrel 1; S5, the docking device returns to its original position. After the feeding is completed, the docking device retracts and is disconnected from the feeder 8 and the barrel 1 for conveying the main material; S6, the feeding device returns to its original position, the feeding device for conveying the main material returns to its original position, and the position directly above the feeding port is vacated; S7, the first auxiliary material is ready for loading, and the feeding device for conveying the first auxiliary material moves to the top of the feeding port; S8, the first mixing, the barrel starts to rotate at the set first mixing speed of 15-20r / min for 1-5 minutes, the purpose is to make the powder of the main material looser and prevent agglomeration. When the mixing time countdown is 5 seconds, the barrel rotates slowly at a speed of 5-10r / min under the control of the frequency converter, so that the barrel 1 rotates until the feed port is located directly below the feeding port 17; S9, the second feeding, repeating the process S2-S6, after the auxiliary material is added into the barrel, the feeding device for conveying the auxiliary material returns to its position; S10, the second mixing, the barrel starts to rotate at the set second mixing speed of 25-30r / min for 20-30 minutes to evenly mix the powders of the two materials. When the mixing time countdown is 5-10 seconds, the barrel is controlled by the inverter to rotate slowly at a speed of 5-10r / min, so that the barrel 1 rotates until the feed port is located directly below the feeding port 17; S11, add the second auxiliary material, then the barrel starts to rotate at the set third mixing speed of 30-50r / min for 3-5 hours to evenly mix the powders of the three materials. When the countdown of the third mixing time is 5-10 seconds, the barrel rotates slowly at a speed of 5-10r / min under the control of the frequency converter. Under the cooperation of the second laser emitter 28 and the second laser reflection plate 29, the barrel 1 stops rotating when it is directly above the receiving hopper 33, and starts to discharge materials into the receiving hopper 33. Then repeat the above process to realize a fully automatic and unmanned mixing technology.

[0032] The above embodiments do not impose any formal limitations on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0034] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic mixing and feeding device for cubic boron nitride raw materials, comprising a first support and a second support, characterized in that: A rotating shaft is arranged between the first support and the second support, a barrel for mixing materials is arranged on the rotating shaft, a supporting platform is arranged above the barrel, at least two feeding devices are arranged on the supporting platform, and a feeding port for feeding materials into the barrel is opened in the supporting platform.

2. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 1, characterized in that: The feeding device comprises a feeder which can be moved above the feeding port, and the inlet of the feeder is connected to a storage box for storing raw materials.

3. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 2, characterized in that: The feeding device also includes a lead screw arranged on the supporting platform, a slider is arranged on the nut pair of the lead screw, and the slider is fixedly connected to the feeding machine.

4. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 3, characterized in that: The side wall of the slider is provided with a blocking piece, and the support platform is also provided with a first limit switch and a second limit switch for limiting the blocking piece.

5. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 1, characterized in that: A docking device is arranged in the feeding port, and the docking device comprises a first docking plate connected to the feeding device and a second docking plate connected to the barrel, and a flexible connecting device is arranged between the first docking plate and the second docking plate.

6. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 5, characterized in that: A fixed plate is formed in the feeding port, a first telescopic rod for driving the first docking plate to move is arranged on one side of the fixed plate, and a second telescopic rod for driving the second docking plate to move is arranged on the other side of the fixed plate.

7. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 6, characterized in that: The inner wall of the feeding port is provided with a third limit switch for limiting the first telescopic rod and a fourth limit switch for limiting the second telescopic rod.

8. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 5, characterized in that: A first butt joint sleeve is arranged on one side of the first butt joint plate facing the second butt joint plate, a second butt joint sleeve is arranged on one side of the second butt joint plate facing the first butt joint plate, and the connecting device is located between the first butt joint sleeve and the second butt joint sleeve.

9. The automatic mixing and feeding device for cubic boron nitride raw materials according to claim 1, characterized in that: A receiving hopper is arranged below the barrel, a first laser emitter is arranged at the inlet of the barrel, a first laser reflector plate cooperating with the first laser emitter is arranged below the supporting platform, a second laser emitter is arranged at the outlet of the barrel, and a second laser reflector plate cooperating with the second laser emitter is arranged above the receiving hopper.

10. A method for automatically mixing and feeding cubic boron nitride raw materials, characterized in that: Using the feeding device according to claim 5 comprises the following steps: S1. Prepare the main material feeding, and move the feeding device for conveying the main material to the top of the feeding port; S2. Align the barrel and rotate it until the feed port is directly below the feeding port; S3, upper and lower docking, the docking device extends to both sides and is connected to the feeding device and the barrel for conveying the main material respectively; S4, main material feeding, the feeding device for conveying the main material is started, and the material is fed into the barrel; S5, the docking device returns to its original position, the docking device retracts, and is disconnected from the feeding device and the barrel for conveying the main material; S6, the feeding device returns to its original position, the feeding device for conveying the main material returns to its original position, and the position directly above the feeding port is vacated; S7, auxiliary material feeding preparation, the feeding device for conveying auxiliary materials moves to the top of the feeding port; S8, the first mixing, the barrel rotates to prevent the main material inside from agglomerating; S9, the second feeding, repeating the process S2-S6, after the auxiliary material is added into the barrel, the feeding device for conveying the auxiliary material returns to its position; S10, the second mixing, the barrel rotates to fully mix the main material and the auxiliary material; S11, repeat S9-S10 until all the auxiliary materials are added into the barrel and the materials in the barrel are fully mixed.

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