A silicon nitride ceramic microsphere production and processing equipment

Abstract

The present application relates to the field of silicon nitride ceramic processing, especially to a silicon nitride ceramic micro-bead production and processing equipment.The present application provides such a silicon nitride ceramic micro-bead production and processing equipment, which comprises a heating furnace and a hot melting cabin, etc.The sliding inner cabin and the annular cabin shell are in a closed state first, driving the silicon nitride ceramic micro-bead blank to immerse downward into the paraffin solution, then the sliding inner cabin and the annular cabin shell are in a separated state, driving the silicon nitride ceramic micro-bead blank to leave the paraffin solution, and the paraffin solution coated on the surface of the silicon nitride ceramic micro-bead blank is blown by hot air flow from the top to the bottom and then from the bottom to the top through the annular pipeline, so as to improve the uniformity and smooth continuity of the paraffin solution coated on the surface of the silicon nitride ceramic micro-bead blank.The technical problem that the paraffin solution will quickly solidify in an uneven form on the surface of the silicon nitride ceramic micro-bead blank when the silicon nitride ceramic micro-bead blank immersed in the paraffin solution is taken out upward is solved.

Description

Technical Field

[0001] This invention relates to the field of silicon nitride ceramic processing, and more particularly to a silicon nitride ceramic microsphere production and processing equipment. Background Technology

[0002] Silicon nitride ceramic materials are widely used in aerospace, chemical, and automotive industries due to their high hardness, wear resistance, and excellent impact resistance. Silicon nitride ceramic microspheres are available in centimeter and micrometer sizes, suitable for use as ball bearing components in various sizes. In the production process of silicon nitride ceramic microspheres, before the high-temperature sintering of the microsphere blank, the pre-formed microsphere blank needs to be immersed in a high-temperature mixed solution of paraffin wax and organic binder for coating. During this step, because the paraffin solution needs to be kept at a high temperature to maintain its fluid state, the paraffin solution coating the surface of the microsphere blank cools and solidifies rapidly the moment it is removed from the paraffin solution. This results in uneven thickness of the paraffin solution coating on different areas of the microsphere blank, leading to solidification. Therefore, a long-term polishing process is required on the solidified paraffin surface of the microsphere blank, affecting the overall production efficiency of the silicon nitride ceramic microspheres. Summary of the Invention

[0003] To overcome the drawback that the paraffin solution rapidly solidifies in an uneven manner on the surface of the silicon nitride ceramic microsphere blank when it is taken out of the paraffin solution, this invention provides a silicon nitride ceramic microsphere production and processing equipment.

[0004] Technical Solution: A silicon nitride ceramic microsphere production and processing equipment includes a heating furnace, a hot-melt chamber, an annular pipe, sliding rods, a sliding inner chamber, an annular shell, a bottom plug, and a carrier plate; the hot-melt chamber is installed inside the heating furnace; an annular cover is fixedly connected to the upper side of the hot-melt chamber; an annular pipe is fixedly connected to the middle of the annular cover; two air inlet pipes are connected to the annular pipe; a sliding rod is slidably connected to the left and right sides of the annular cover; a fixing frame is fixedly connected between the two sliding rods; an electric lifting push rod is installed in the heating furnace; the telescopic end of the electric lifting push rod... A fixed frame is attached; a connecting rod is fixed to the sliding rod; a sliding inner chamber is fixedly connected between the two connecting rods; an annular shell is slidably connected to the outside of the sliding inner chamber; a first spring is fixedly connected between the connecting rod and the annular shell; a liquid outlet groove structure is opened at the bottom of the sliding inner chamber; a bottom plug is fixedly connected to the bottom of the annular shell; a liquid inlet hole structure is opened on the upper side of the annular shell; a carrier plate is inserted inside the sliding inner chamber; a number of coarse holes are opened on the carrier plate, which are designed as a funnel-shaped structure that narrows from top to bottom, and the coarse holes are elliptical.

[0005] Preferably, the sliding inner compartment has a plurality of ventilation holes in the middle.

[0006] Preferably, the inner wall of the sliding inner compartment is provided with an annular guide vane structure.

[0007] Preferably, a support column is fixedly connected to the bottom of the sliding inner compartment; a second spring is fixedly connected to the upper side of the support column and the carrier plate.

[0008] Preferably, the surface of the carrier disk has an anti-slip texture.

[0009] Preferably, the upper side of the coarse hole is provided with anti-slip ridges.

[0010] Preferably, a fine mesh is fixed to the bottom of the coarse holes.

[0011] Preferably, a perforated plate is fixedly connected to the coarse hole; the perforated plate has a fine hole structure.

[0012] Preferably, the surface of the perforated plate has an anti-slip texture.

[0013] Preferably, a handle is fixed to the surface of the carrier disk.

[0014] The beneficial effects of this invention are as follows: The silicon nitride ceramic microsphere production and processing equipment described in this invention includes a hot melt chamber installed inside the heating furnace. A sliding inner chamber and an annular shell are connected inside the hot melt chamber via a sliding rod. A carrier tray is placed on the sliding inner chamber. Initially, the sliding inner chamber and the annular shell are in a closed state, causing the silicon nitride ceramic microsphere blank in the carrier tray to be immersed downwards into the paraffin solution and shaken up and down repeatedly, allowing the paraffin solution to completely coat the surface of the silicon nitride ceramic microsphere blank. Then, the sliding inner chamber and the annular shell are in a separated state, causing the silicon nitride ceramic microsphere blank in the carrier tray to be lifted upwards out of the paraffin solution and shaken up and down repeatedly, allowing excess paraffin on the surface of the silicon nitride ceramic microsphere blank to fall downwards. Hot airflow is then blown from top to bottom and then from bottom to top through an annular pipe onto the paraffin solution coating the surface of the silicon nitride ceramic microsphere blank. This slows down the solidification rate of the paraffin solution on the surface of the silicon nitride ceramic microsphere blank while improving the uniformity and smoothness of the paraffin solution coating on the surface of the silicon nitride ceramic microsphere blank.

[0015] This invention solves the technical problem that when a silicon nitride ceramic microsphere blank immersed in paraffin solution is removed from the surface of the blank, the paraffin solution will quickly solidify in an uneven manner on the surface of the silicon nitride ceramic microsphere blank. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram illustrating the present invention according to an embodiment;

[0017] Figure 2 This is a cross-sectional view of the hot melt chamber of the present invention, according to an embodiment.

[0018] Figure 3 This is a three-dimensional structural diagram of the connecting rod according to an embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional view of the annular cabin of the present invention according to an embodiment;

[0020] Figure 5 This is a first-view cross-sectional view illustrating the sliding inner cabin and annular hull of the present invention according to an embodiment;

[0021] Figure 6 This is a second perspective cross-sectional view illustrating the sliding inner cabin and annular hull of the present invention according to an embodiment;

[0022] Figure 7 This is a cross-sectional view of the carrier disk used to describe the present invention according to an embodiment.

[0023] The markings in the attached diagram are as follows: 1-Heating furnace, 2-Hot melting chamber, 21-Annular cover, 22-Annular pipe, 220-Air inlet pipe, 31-Sliding rod, 32-Fixed frame, 33-Electric lifting push rod, 34-Connecting rod, 35-First spring, 41-Sliding inner chamber, 4101-Liquid outlet tank, 4102-Ventilation hole, 4103-Annular guide plate, 42-Annular shell, 4201-Liquid inlet hole, 43-Bottom plug, 44-Support column, 45-Second spring, 5-Carrier plate, 501-Coarse hole, 51-Anti-slip ridge, 52-Fine mesh, 53-Perforated plate, 5301-Fine hole, 54-Handle. Detailed Implementation

[0024] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. Example 1

[0025] A silicon nitride ceramic microsphere production and processing equipment, such as Figures 1-7As shown, the system includes a heating furnace 1, a hot-melt chamber 2, an annular pipe 22, sliding rods 31, a sliding inner chamber 41, an annular shell 42, a bottom plug 43, and a carrier plate 5. The hot-melt chamber 2 is installed inside the heating furnace 1. An annular cover 21 is fixedly connected to the upper side of the hot-melt chamber 2. An annular pipe 22 is fixedly connected to the middle of the annular cover 21. Two air inlets 220 are connected to the annular pipe 22. A sliding rod 31 is slidably connected to the left and right sides of the annular cover 21. A fixing frame 32 is fixedly connected between the upper ends of the two sliding rods 31. An electric lifting push rod 33 is installed at the rear of the heating furnace 1. The telescopic end of the electric lifting push rod 33 is fixedly connected to the fixing frame 32. A connecting rod 34 is welded to the lower end of each of the two sliding rods 31. The two connecting rods 34 are bolted together. A sliding inner chamber 41 is connected; an annular shell 42 is slidably connected to the outer side of the sliding inner chamber 41; a first spring 35 is fixed between each of the two connecting rods 34 and the annular shell 42; two liquid outlet grooves 4101 are opened at the bottom of the sliding inner chamber 41; two bottom plugs 43 adapted to the liquid outlet grooves 4101 are fixed at the bottom of the annular shell 42; a liquid inlet hole 4201 is opened on the upper side of the annular shell 42; a carrier plate 5 is inserted inside the sliding inner chamber 41; several coarse holes 501 are opened on the carrier plate 5, which are set as a bucket-shaped structure that shrinks from top to bottom, and the coarse holes 501 are elliptical structures. When ceramic microbeads are stuck in the coarse holes 501, a gap is still left between the ceramic microbeads and the coarse holes 501.

[0026] like Figure 6 As shown, the sliding inner chamber 41 has several ventilation holes 4102 in the middle. The ventilation holes 4102 are located on the lower side of the carrier plate 5 and are set as an inclined structure with the inner side higher than the outer side. The inner wall of the sliding inner chamber 41 is provided with an annular guide plate 4103. The annular guide plate 4103 is set as a conical funnel-shaped structure that shrinks upward from the lower side of the ventilation holes 4102. The annular guide plate 4103 blocks the ventilation holes 4102 to prevent the paraffin solution splashed downward from the coarse hole 501 from splashing into the ventilation holes 4102.

[0027] like Figure 5 As shown, several handles 54 are fixed to the surface of the carrier tray 5. After the operator pulls the carrier tray 5 upward from the sliding inner chamber 41 using the handles 54, the carrier tray 5 can be flipped over to pour out the ceramic microspheres that have completed the soaking treatment.

[0028] The hot melt chamber 2 is filled with paraffin solution. The heating furnace 1 heats the paraffin solution in the hot melt chamber 2 to keep the paraffin solution in a high-temperature fluid state. The air inlet pipe 220 of the annular pipe 22 is connected to a hot air delivery device. The first spring 35 is initially stretched upward. The annular chamber shell 42 is blocked by the annular cover 21 and cannot move upward under the tension of the first spring 35. This allows the liquid outlet groove 4101 at the bottom of the sliding inner chamber 41 to initially move away from the bottom plug 43 of the annular chamber shell 42. At this time, the gas in the hot melt chamber 2 will be heated to a high temperature state along with the paraffin solution. The high-temperature gas in the hot melt chamber 2 will preheat the carrier plate 5 upward through the liquid outlet groove 4101 at the bottom of the sliding inner chamber 41. This prevents a layer of paraffin from solidifying on the surface of the carrier plate 5 when it is directly immersed downward in the paraffin solution in the hot melt chamber 2 at a low temperature.

[0029] First, the silicon nitride ceramic microsphere blanks of this silicon nitride ceramic microsphere production and processing equipment are immersed in paraffin solution. After the workers pour the silicon nitride ceramic microsphere blanks into the carrier plate 5 in the sliding inner chamber 41, the telescopic end of the electric lifting push rod 33 drives the sliding rod 31 to move downward through the fixed frame 32. The sliding rod 31 drives the sliding inner chamber 41 and the annular chamber shell 42 to move downward together. At the same time, the stretched first spring 35 pulls the annular chamber shell 42 towards the sliding inner chamber 41 through the tension, so that the bottom plug 43 of the annular chamber shell 42 is inserted into the liquid outlet groove 4101 at the bottom of the sliding inner chamber 41. At this time, the sliding inner chamber 41 and the annular chamber shell 42 form a bottom-closed chamber structure.

[0030] After the electric lifting push rod 33 drives the sliding rod 31 to immerse the closed sliding inner chamber 41 and the annular shell 42 downward into the paraffin solution in the hot melt chamber 2, the paraffin solution in the hot melt chamber 2 is poured from top to bottom into the closed chamber composed of the sliding inner chamber 41 and the annular shell 42 through the liquid inlet hole 4201. The paraffin solution that is poured down from top to bottom pushes the silicon nitride ceramic microsphere blank in the carrier plate 5 to roll in all directions, so that all areas of the surface of the silicon nitride ceramic microsphere blank can be coated with paraffin solution. When the silicon nitride ceramic microsphere blank rolling on the carrier plate 5 moves to the position of the coarse hole 501, the silicon nitride ceramic microsphere blank is stuck in the coarse hole 501. After the silicon nitride ceramic microsphere blank immersed in the paraffin solution is coated with paraffin, it is evenly distributed in each coarse hole 501. The paraffin solution will flow down along each coarse hole 501 of the carrier plate 5 to the inner bottom of the sliding inner chamber 41.

[0031] Afterwards, the paraffin solution of the silicon nitride ceramic microsphere blank in this silicon nitride ceramic microsphere production and processing equipment is slowly solidified. After the paraffin coating treatment of the silicon nitride ceramic microsphere blank is completed, the electric lifting push rod 33 drives the sliding rod 31 and its connected sliding inner chamber 41 and annular chamber shell 42 to be lifted upward from the paraffin solution in the hot melt chamber 2. When the annular chamber shell 42 is blocked by the annular cover 21, the liquid outlet groove 4101 at the bottom of the sliding inner chamber 41, which continues to move upward, will separate from the bottom plug 43 at the bottom of the annular chamber shell 42. The excess paraffin solution in the sliding inner chamber 41 flows back downward into the hot melt chamber 2 through the liquid outlet groove 4101.

[0032] Subsequently, the telescopic end of the electric lifting push rod 33 drives the sliding rod 31 to move downward again until the bottom plug 43 at the bottom of the annular chamber 42 is inserted into the liquid outlet groove 4101 at the bottom of the sliding inner chamber 41, so that the sliding inner chamber 41 and the annular chamber 42 form a bottom-closed chamber structure. At the same time, the external hot air delivery equipment delivers hot air to the annular pipe 22 through the air inlet pipe 220. The hot air is sprayed from the jet nozzles in all directions of the annular pipe 22 onto the surface of the carrier plate 5, so that the hot air blows away the paraffin solution covering the surface of the silicon nitride ceramic microsphere blank from top to bottom. This not only slows down the solidification rate of the paraffin solution covering the surface of the silicon nitride ceramic microsphere blank, but also blows away the excess paraffin solution covering the surface of the silicon nitride ceramic microsphere blank downward as the hot air flows continuously from top to bottom along the surface of the silicon nitride ceramic microsphere blank, so that the paraffin solution covers the surface of the silicon nitride ceramic microsphere blank in a continuous, smooth, thin layer.

[0033] Finally, the electric lifting push rod 33 drives the sliding rod 31 and its connected sliding inner chamber 41 and annular shell 42 to move upward. The annular shell 42 is again blocked by the annular cover 21, causing the bottom plug 43 to separate from the liquid outlet 4101 at the bottom of the sliding inner chamber 41. The sliding inner chamber 41 continues to drive the surface of the carrier plate 5 to move upward until the vent 4102 of the sliding inner chamber 41 aligns with the jet nozzle of the annular pipe 22. Hot air is ejected from the jet nozzles in all directions of the annular pipe 22, and the ejected hot air flows along the vent. The hot air flows from hole 4102 to each coarse hole 501 of the carrier disk 5. As the hot air flows from bottom to top through the coarse holes 501, it can blow the paraffin solution coating the surface of the silicon nitride ceramic microsphere blank evenly, so that the paraffin solution coating the surface of the silicon nitride ceramic microsphere blank is solidified in a uniform state. This reduces the time required for uniform polishing of the paraffin coating the surface of the silicon nitride ceramic microsphere blank in the later stage, or even eliminates the need for uniform polishing of the paraffin coating the surface of the silicon nitride ceramic microsphere blank in the later stage. Example 2

[0034] like Figures 1-7As shown, based on Embodiment 1, the inner bottom of the sliding inner compartment 41 in this embodiment is bolted with a support column 44; the upper side of the support column 44 and the carrier plate 5 are jointly fixed with a second spring 45; the surface of the carrier plate 5 is provided with an anti-slip texture; each of the coarse holes 501 of the carrier plate 5 is provided with several anti-slip ridges 51 on the upper side; and each of the coarse holes 501 of the carrier plate 5 is fixed with a fine mesh 52 at the bottom.

[0035] During the paraffin solution immersion process of the silicon nitride ceramic microsphere blanks in this silicon nitride ceramic microsphere production and processing equipment, if the size of the silicon nitride ceramic microsphere blanks is large, the paraffin solution cascading down from top to bottom cannot smoothly push the silicon nitride ceramic microsphere blanks in the carrier plate 5 to roll in all directions. At this time, the electric lifting push rod 33 needs to drive the sliding rod 31 and its connected sliding inner chamber 41 and annular shell 42 to move back and forth in the up and down direction. This allows the carrier plate 5, which moves back and forth in the up and down direction with the sliding inner chamber 41, to work with the elastic force of the second spring 45 to oscillate irregularly up and down in the sliding inner chamber 41. This allows the carrier plate 5 to drive the silicon nitride ceramic microsphere blanks to roll in all directions through oscillation. This process achieves the effect of coating all areas of the silicon nitride ceramic microsphere blank with paraffin solution, while also ensuring that the silicon nitride ceramic microsphere blank is evenly distributed in each coarse hole 501 after the paraffin coating treatment. The anti-slip structure texture on the surface of the carrier disk 5 and the anti-slip protrusions 51 on the coarse holes 501 can slow down the rolling speed of the silicon nitride ceramic microsphere blank on the surface of the carrier disk 5, avoiding violent collisions between adjacent silicon nitride ceramic microsphere blanks. In addition, the fine mesh 52 in the coarse holes 501 can block the downward flow of paraffin solution, slow down the speed at which the paraffin solution flows down through the coarse holes 501, and prolong the soaking time of the silicon nitride ceramic microsphere blank in the paraffin solution. Example 3

[0036] like Figures 1-7 As shown, based on Embodiment 1, each of the coarse holes 501 of the carrier disk 5 in this embodiment is fixed with a perforated plate 53; each perforated plate 53 is provided with a plurality of fine holes 5301; and the surface of each perforated plate 53 is provided with an anti-slip texture.

[0037] In the above embodiment, the coarse holes 501 of the carrier plate 5 are suitable for holding silicon nitride ceramic microsphere blanks with a size of centimeters. When the size of the silicon nitride ceramic microsphere blank is in the millimeter range, it needs to be held in place by the fine holes 5301 of the perforated plate 53. The anti-slip texture on the surface of the perforated plate 53 can slow down the rolling speed of the silicon nitride ceramic microsphere blank on the surface of the perforated plate 53 and avoid violent collisions between adjacent silicon nitride ceramic microsphere blanks.

[0038] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the invention without departing from the principles and spirit of the invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for illustrative purposes only and is not intended to limit the invention; rather, the scope of protection is defined by the content of the claims.

Claims

1. A silicon nitride ceramic microsphere production and processing equipment, comprising: a heating furnace (1); A hot melt chamber (2) is installed inside the heating furnace (1); an annular cover (21) is fixed to the upper side of the hot melt chamber (2); Its features are, It also includes a ring-shaped pipe (22); An annular pipe (22) is fixedly connected to the middle of the annular cover (21); two air inlets (220) are connected to the annular pipe (22); a sliding rod (31) is slidably connected to the left and right sides of the annular cover (21); a fixed frame (32) is fixedly connected between the two sliding rods (31); an electric lifting push rod (33) is installed in the heating furnace (1); the telescopic end of the electric lifting push rod (33) is fixedly connected to the fixed frame (32); a connecting rod (34) is fixedly connected to the sliding rod (31); a sliding inner chamber (41) is fixedly connected between the two connecting rods (34); the outer side of the sliding inner chamber (41) slides... The annular chamber (42) is dynamically connected; a first spring (35) is fixed between the connecting rod (34) and the annular chamber (42); a liquid outlet groove (4101) structure is provided at the bottom of the sliding inner chamber (41); a bottom plug (43) is fixed at the bottom of the annular chamber (42); a liquid inlet hole (4201) structure is provided on the upper side of the annular chamber (42); a carrier plate (5) is inserted inside the sliding inner chamber (41); a number of coarse holes (501) structure that penetrate vertically are opened on the carrier plate (5), the coarse holes (501) are set as a bucket-shaped structure that contracts from top to bottom, and the coarse holes (501) are elliptical structures.

2. The silicon nitride ceramic microsphere production and processing equipment according to claim 1, characterized in that, The sliding inner compartment (41) has several ventilation holes (4102) in the middle.

3. The silicon nitride ceramic microsphere production and processing equipment according to claim 2, characterized in that, The inner wall of the sliding inner compartment (41) is provided with an annular guide vane (4103) structure.

4. The silicon nitride ceramic microsphere production and processing equipment according to claim 1, characterized in that, A support column (44) is fixed to the bottom of the sliding inner compartment (41); a second spring (45) is fixed to the upper side of the support column (44) and the carrier plate (5).

5. The silicon nitride ceramic microsphere production and processing equipment according to claim 1, characterized in that, The surface of the carrier disk (5) is provided with an anti-slip texture.

6. The silicon nitride ceramic microsphere production and processing equipment according to claim 1, characterized in that, The upper side of the coarse hole (501) is provided with anti-slip ridges (51).

7. The silicon nitride ceramic microsphere production and processing equipment according to claim 1, characterized in that, A fine mesh (52) is fixed to the bottom of the coarse hole (501).

8. The silicon nitride ceramic microsphere production and processing equipment according to claim 1, characterized in that, A perforated plate (53) is fixed in the coarse hole (501); a fine hole (5301) structure is formed on the perforated plate (53).

9. The silicon nitride ceramic microsphere production and processing equipment according to claim 8, characterized in that, The surface of the perforated plate (53) is provided with an anti-slip texture.

10. A silicon nitride ceramic microsphere production and processing equipment according to any one of claims 1-9, characterized in that, A handle (54) is fixed to the surface of the carrier (5).

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