Automatic mixing method and device for soft magnetic ferrite pug

Abstract

The invention discloses an automatic mixing method and device for soft magnetic ferrite pug. The method comprises the following steps: step 1, putting an aged soft magnetic ferrite muddy mixture into an extrusion device; 2, the rotating speed of an extrusion device is set; thirdly, the cutting speed and the cutting frequency corresponding to a cutter of the cutting device are set in a matched mode; 4, after cutting is completed, blocky soft magnetic ferrite pug is conveyed to a pug feeding opening of the extrusion device through a conveying device to continue to be subjected to pug mixing; and 5, setting the pug mixing process time by using the pug mixing control system, and after the set process time is completed, sending out a command for stopping the extruder and the cutting tool by the pug mixing control system to complete the mixing process. According to the automatic mixing method and device for the soft magnetic ferrite pug, the plasticity, uniformity and stability of the soft magnetic ferrite pug can be guaranteed, so that the strength and density of a blank body are guaranteed, and meanwhile, the labor intensity of workers can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of soft ferrites, and in particular to an automatic mixing method and device for soft ferrite mud. Background Art

[0002] Soft ferrite materials are important basic components and materials for power electronics related industries, and are widely used in aerospace, biomedicine, renewable energy power generation, automation equipment, network communications and other industries and fields. With the continuous advancement of technology, equipment is developing in the direction of high frequency, low energy consumption, and integration. Soft ferrite materials are becoming an indispensable and irreplaceable type of electronic functional materials in all walks of life. At present, in the wet molding of soft ferrites, the quality of the mixing equipment plays a key role in the mixing uniformity and stability of the soft ferrite mud. The existing ferrite mixing mostly adopts extrusion mixing by extruder, manual cutting and extrusion of mud, manual handling of mud and pouring it into the extruder again, thereby realizing a long extrusion mixing step. The above steps are not only labor-intensive, but also some impurities are inevitably mixed in the process of manual participation, causing mud pollution and affecting the later performance and quality of soft ferrite.

[0003] Prior art, such as patent documents with publication numbers CN118416754A and CN102917855B, disclose a mixing device for ferrite core raw materials, which mainly focuses on the design of the mixing device body, including the design of parts such as a mixing bracket, a mixing barrel, and a mixing roller. The mixing effect of the core raw materials is achieved through the movement of a reciprocating drive assembly. The patent is mainly aimed at the design of the ferrite core raw material mixing device body, and only realizes the uniform mixing of the raw materials inside the mixing device, which is similar to a mixing device; Prior art, such as patent documents with publication number CN115816686A, discloses an automatic mixing equipment for blister materials. The equipment is mainly aimed at the automatic mixing of blister materials, and uses an electromagnetic valve and a flow meter to meter the blister materials and additives stored in the raw material bin into the inside of the dosing pipe in sequence, and then the blister materials and additives are mixed once and twice by rotating the shaft.

[0004] However, there is a lack of a method and device for mixing the soft ferrite mud. Summary of the invention

[0005] In order to solve the above technical problems, therefore, the purpose of the present invention is to provide an automated mixing method and device for soft ferrite clay, which can solve the problems of embryo strength and density caused by uneven mixing of soft ferrite clay in the prior art.

[0006] This application adopts the following technical solutions:

[0007] A method for automatically mixing soft ferrite clay comprises the following steps:

[0008] Step 1: Place the stale soft ferrite mud mixture into the extrusion device;

[0009] Step 2: Use the mud mixing control system to set the rotation speed of the extruder;

[0010] Step 3: Use the mud mixing control system to match the cutting speed and cutting frequency corresponding to the cutter of the cutting device;

[0011] Step 4: After the cutting is completed, the block-shaped soft ferrite mud material is transported to the mud material inlet of the extrusion device through the conveying device to continue the mud material mixing;

[0012] Step 5: Use the clay mixing control system to set the clay mixing process time. When the set process time is completed, the clay mixing control system issues a command to stop the extruder and cutting tool to complete the mixing process. Whether the clay is fully mixed is the basis for setting the mixing process time. Whether the clay contains coarse particles is judged to be fully mixed (generally, it takes about half an hour to fully mix 50kg of clay).

[0013] Among them, in step 2, the rotation speed of the extruder is set to gradually transition from low speed to medium-high speed until the mixing process is completed.

[0014] Among them, the rotation speed of the extrusion device is set to gradually transition from 1rad / s to 10rad / s, with time as a variable, first determine the mixing time, then set the starting time speed, set it to 10rad / s at 10min, and you can choose linear or nonlinear speed increase conditions to achieve from 1rad / s to 10rad / s. Generally, nonlinear speed increase conditions are selected because mud mixing is a nonlinear process. Until the mixing process is completed. Taking 50kg mud mixing as an example, the motor drives the extrusion device to rotate for mud mixing. The mud that has just been aged is put into the extrusion device. The extrusion device is subject to very large resistance, and it is necessary to use low speed and high torque conditions to complete the early mud mixing. When the mud is relatively fully mixed, its fluidity becomes stronger, and high speed and low torque conditions can be used to speed up the mixing speed.

[0015] Among them, step three uses the mud mixing control system to match and set the cutting speed and cutting frequency of the cutting tool, and sets the cutting speed and frequency in conjunction with the rotation speed of the extruder in step two to cut the extruded soft ferrite mud into cylindrical blocks of a certain height. The extruder speed is proportional to the speed at which the mud is extruded, and the cutting speed determines the length of time the cutting tool takes to complete a cut; when the cutting speed is low and the extrusion speed is fast, it is easy to cause the mud to be blocked and squeeze the tool, causing the tool to deform or be damaged. When the cutting speed is too fast and the extrusion speed is slow, it is also easy to cause tool damage problems. The cutting frequency determines the length of the mud to be cut, and the cutting frequency is determined by the extrusion speed and the length required to be cut. Only when the cutting speed and frequency match the extrusion speed can the automated mud refining performance be more efficiently exerted.

[0016] Among them, in step five, the mixing process time is set by a countdown method. When the countdown reaches zero, the host computer sends a stop command to the extruder controller and sends a zero pulse to the relay of the cutting tool to stop working.

[0017] A soft ferrite clay material automatic mixing device, comprising a clay material mixing control system, an extrusion device, a cutting device, and a conveying device which are interconnected; wherein the cutting device is located at the outlet of the extrusion device, and the conveying device is connected to the clay material inlet of the extrusion device;

[0018] The mud mixing control system is configured to control the extrusion speed of the device, the cutting speed and cutting frequency of the tool of the cutting device, and the mixing process time; the mud mixing control system sets the rotation speed of the extrusion device to gradually transition from low speed to medium and high speed; the mixing process time is the time required to fully mix the mud, and the total process time and time period required for mud refining are set in the upper computer control software, and the extruder speed, cutting frequency and cutting speed corresponding to each time period are set.

[0019] The extrusion device is configured to extrude the stale muddy soft ferrite muddy mixture to form a rod-shaped muddy material;

[0020] The cutting device is configured to cut the stick-shaped clay material;

[0021] The conveying device is configured to convey the cut mud material into the extruding device.

[0022] Wherein, the cutting tool of the cutting device is a U-shaped tool; and / or the blade of the tool is a thin molybdenum wire.

[0023] Wherein, the cutting tool size of the cutting device is larger than the size of the extruded rod-shaped mud material.

[0024] The cutting device further comprises a power device for a U-shaped tool which provides power for the cutting tool. The power device is a pneumatic strut which can realize reciprocating motion, and a relay is used to control its up and down reciprocating motion.

[0025] Wherein, the conveying device includes a collecting barrel and a conveyor belt. The collecting barrel is located below the cutting device. The collecting barrel is used to collect the cut mud material and send the cut mud material to the conveyor belt. The conveyor belt is connected to the mud material inlet of the extrusion device.

[0026] The beneficial effects of the present invention are as follows:

[0027] (1) The existing equipment requires two or even more people to complete the mixing, which requires a lot of manpower and has high labor intensity. The automatic mixing method and device of soft ferrite clay of the present invention can ensure the plasticity, uniformity and stability of soft ferrite clay, thereby ensuring the strength and density of the embryo, and can effectively reduce the labor intensity of the staff.

[0028] (2) The automatic mixing method for soft ferrite mud of the present invention sets the extrusion speed of the extruder to a curve speed, thereby ensuring the smooth progress of the mixing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an overall schematic diagram of the automatic mixing method of soft ferrite clay of the present invention;

[0030] Figure 2 It is an overall schematic diagram of the automatic mixing device for soft ferrite mud of the present invention.

[0031] Figure numerals: 100 - mud mixing control system, 200 - extrusion device, 300 - cutting device, 400 - conveying device, 500 - emergency braking device, 110 - extrusion control unit, 120 - cutting control unit, 130 - conveying control unit, 140 - time control unit. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Since the uniformity of ferrite mud mixing is directly related to the performance of ferrite, the mud is squeezed and mixed by an extrusion device, so that the different components in the mud can be fully mixed to ensure its uniformity, providing strong support for the later ferrite embryo production, embryo firing and molding procedures. Since the weight of a mud mixture is about 1 ton, the labor intensity of simple manual operation such as feeding, extruding mud cutting, etc. is very high. At the same time, manual operation will inevitably cause some pollution to the mud and affect the quality of the mud. Based on the above reasons, the present invention introduces an automated mixing method and device, which can reduce the labor intensity of workers on the one hand, and ensure the quality of the mud on the other hand.

[0035] A method for automatically mixing soft ferrite clay comprises the following steps:

[0036] Step 1: Put the stale soft ferrite mud mixture into an extrusion device; the extrusion device can be an extruder;

[0037] Step 2: Use the mud mixing control system to set the rotation speed of the extruder;

[0038] Step 3: Use the mud mixing control system to match the cutting speed and cutting frequency corresponding to the cutter of the cutting device;

[0039] Step 4: After the cutting is completed, the block-shaped soft ferrite mud material is transported to the mud material inlet of the extrusion device through the conveying device to continue the mud material mixing;

[0040] Step 5: Use the clay mixing control system to set the clay mixing process time. When the set process time is completed, the clay mixing control system issues a command to stop the extruder and the cutting tool to complete the mixing process.

[0041] See also Figure 1 The specific process flow of the automatic mixing method of soft ferrite clay of the present invention is as follows: the stale clay enters the feed port of the extruder and is extruded and mixed in the extruder; the continuous rod-shaped clay is extruded from the outlet of the extruder, and the cutting device cuts the extruded rod-shaped clay into short cylinders; the short cylindrical clay falls into the conveyor belt under the action of gravity and returns to the feed port of the extruder through the conveyor belt; when the preset mixing time is reached, the clay mixing control system stops the mixing operation.

[0042] The mixing process of the present invention is specifically an extrusion-cutting-re-extrusion-re-cutting cyclic process, in which the soft ferrite mud mixture is extruded and mixed in an extrusion device and then extruded to form a continuous rod-shaped mud material, which is cut into short cylindrical shapes by a cutting device, and a conveying device conveys the short cylindrical mud material into the extrusion device; that is, the soft ferrite mud mixture undergoes multiple extrusion-cutting steps during the entire mixing process, and finally achieves the purpose of uniform mixing.

[0043] Preferably, in step 2, the rotation speed of the extruder is set to gradually transition from low speed to medium and high speed until the mixing process is completed. More preferably, the rotation speed of the extruder is set to gradually transition from 1rad / s to 10rad / s until the mixing process is completed. In the early stage of mixing, the resistance of the stale mud is large, and the extruder needs to use low speed and high torque to ensure that the mud is mixed normally without clogging. In the later stage, the resistance of the mud gradually decreases, so the host computer sets the speed curve to control the extruder to gradually transition from 1rad / s to 10rad / s until the mixing process is completed.

[0044] Preferably, in step 3, the upper computer software is used to match and set the cutting speed and cutting frequency of the cutting tool, and the cutting speed and frequency are set in conjunction with the rotation speed of the extruder in step 2, so as to cut the extruded soft ferrite mud into cylindrical blocks of a certain height. The certain height in the present invention is 13mm~20mm; this size not only ensures that the cut blocks are not easy to block the extrusion device, ensures the uniformity of the mixing, but also ensures that the cutting tool can easily achieve cutting.

[0045] Preferably, in step five, a countdown method is used to set the mixing process time. When the countdown reaches zero, the host computer sends a stop command to the extruder controller and simultaneously sends a zero pulse to the relay of the cutting tool to stop working.

[0046] Accordingly, see Figure 2 The present invention also provides an automatic mixing device for soft ferrite clay, which includes a clay mixing control system 100, an extrusion device 200, a cutting device 300, and a conveying device 400 that are interconnected; wherein the cutting device is located at the exit position of the extrusion device, and the conveying device is connected to the clay inlet of the extrusion device; wherein the clay mixing control system is configured to control the extrusion speed of the device, the cutting speed and cutting frequency of the tool of the cutting device, and the mixing process time; the extrusion device is configured to extrude the stale clay-like soft ferrite clay mixture to form a rod-like clay; the cutting device is configured to cut the rod-like clay; and the conveying device is configured to convey the cut clay into the extrusion device. The clay mixing control system sets the rotation speed of the extrusion device to gradually transition from low speed to medium and high speed.

[0047] The cutting tool of the cutting device is a U-shaped tool; and / or the blade of the tool is a fine molybdenum wire. The cutting tool is designed as a U-shaped tool, and the blade is a fine molybdenum wire, which can complete the smooth and fast cutting of soft ferrite mud.

[0048] Preferably, the cutting tool of the cutting device is larger than the size of the extruded rod-shaped clay. The U-shaped tool is larger than the extruded mixed clay, and can complete the upper and lower cutting of the mixed clay without affecting the normal operation of the extruder.

[0049] Preferably, the cutting device also includes a power device for the U-shaped tool that provides power for the cutting tool. The power device is a pneumatic support rod that can achieve reciprocating motion, and a relay is used to control its up and down reciprocating motion to achieve reciprocating motion of the U-shaped tool.

[0050] Preferably, as an embodiment, the conveying device includes a conveyor belt, which is arranged below the outlet of the extrusion device, and the cut mud material directly falls onto the conveyor belt.

[0051] Preferably, the conveying device includes a collecting barrel and a conveyor belt. The collecting barrel is located below the cutting device. The collecting barrel is used to collect the cut mud and send the cut mud to the conveyor belt. The conveyor belt is connected to the mud inlet of the extruder. The cut cylindrical block falls into the collecting barrel at the bottom of the pulley due to gravity. The mud control system controls the collection barrel to rotate and send the mud into the conveyor belt. The mud control system controls the operation of the conveyor belt to send the mud into the extruder again to complete the mud mixing process within the specified time. A protective cover is set on the conveyor belt to prevent the mud composition from being affected by the external environment during the transmission of the conveyor belt.

[0052] The mud mixing control system includes an extrusion control unit 110, a cutting control unit 120, a conveying control unit 130 and a time control unit 140, wherein the extrusion setting unit is used to control the extrusion speed of the extrusion device, the cutting setting unit is used to control the cutting speed and frequency of the cutting device, the conveying control unit is used to control the rotation of the collecting barrel and the movement of the conveyor belt, and the time control unit is used to control the start and stop of the entire mixing process.

[0053] The automatic mixing device for soft ferrite mud of the present invention is also provided with an emergency brake device 500. When any emergency situation is found during the operation of the device, the device can be stopped urgently to ensure the safety of the workers.

[0054] It will be easily understood by those skilled in the art that 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0055] The above embodiments are provided only for the purpose of describing the present invention, and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims. Various equivalent substitutions and modifications made without departing from the spirit and principle of the present invention should be included within the scope of the present invention.

Claims

1. A method for automatically mixing soft ferrite clay, characterized in that: The following steps are involved: Step 1: Place the stale soft ferrite mud mixture into the extrusion device; Step 2: Use the mud mixing control system to set the rotation speed of the extruder; Step 3: Use the mud mixing control system to match the cutting speed and cutting frequency corresponding to the cutter of the cutting device; Step 4: After the cutting is completed, the block-shaped soft ferrite mud material is transported to the mud material inlet of the extrusion device through the conveying device to continue the mud material mixing; Step 5: Use the clay mixing control system to set the clay mixing process time. When the set process time is completed, the clay mixing control system issues a command to stop the extruder and the cutting tool to complete the mixing process.

2. The method for automatically mixing soft ferrite clay according to claim 1, characterized in that: In step 2, the rotation speed of the extruder is set to gradually transition from a low speed to a medium-high speed until the mixing process is completed.

3. The method for automatically mixing soft ferrite clay according to claim 2, characterized in that: The rotation speed of the extruder is set to gradually transition from 1 rad / s to 10 rad / s until the mixing process is completed.

4. The method for automatically mixing soft ferrite clay according to claim 1, characterized in that: Step three: use the clay mixing control system to match and set the cutting speed and cutting frequency of the cutting tool, and set the cutting speed and frequency in conjunction with the extruder rotation speed in step two to cut the extruded soft ferrite clay into cylindrical blocks of a certain height.

5. The method for automatically mixing soft ferrite clay according to claim 1, characterized in that: In step 5, the mixing process time is set by countdown. When the countdown reaches zero, the host computer sends a stop command to the extruder controller and sends a zero pulse to the relay of the cutting tool to stop working.

6. An automatic mixing device for soft ferrite slurry, characterized in that: It includes a clay mixing control system, an extrusion device, a cutting device, and a conveying device which are interconnected; wherein the cutting device is located at the outlet of the extrusion device, and the conveying device is connected to the clay inlet of the extrusion device; The clay material mixing control system is configured to control the extrusion speed of the device, the cutting speed and cutting frequency of the cutter of the cutting device, and the mixing process time; the clay material mixing control system sets the rotation speed of the extrusion device to gradually transition from low speed to medium and high speed; The extrusion device is configured to extrude the stale muddy soft ferrite muddy mixture to form a rod-shaped muddy material; The cutting device is configured to cut the stick-shaped clay material; The conveying device is configured to convey the cut mud material into the extruding device.

7. The automatic mixing device for soft ferrite slurry according to claim 6, characterized in that: The cutting tool of the cutting device is a U-shaped tool; and / or the blade of the tool is a thin molybdenum wire.

8. The automatic mixing device for soft ferrite slurry according to claim 6, characterized in that: The cutting tool size of the cutting device is larger than the size of the extruded rod-shaped mud material.

9. The automatic mixing device for soft ferrite slurry according to claim 6, characterized in that: The cutting device also includes a power device for the U-shaped tool that provides power for the cutting tool. The power device is a pneumatic support rod that can realize reciprocating motion, and a relay is used to control its up and down reciprocating motion.

10. The automatic mixing device for soft ferrite slurry according to claim 6, characterized in that: The conveying device includes a collecting barrel and a conveyor belt. The collecting barrel is located below the cutting device. The collecting barrel is used to collect the cut mud material and convey the cut mud material to the conveyor belt. The conveyor belt is connected to the mud material inlet of the extrusion device.

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