Piezoelectric ceramic piece green body powder mixing and sieving integrated device

Abstract

The utility model discloses a powder mixing and sieving integrated device for a piezoelectric ceramic piece green body, and belongs to a material mixing and sieving device. The utility model aims to provide a special device integrating powder mixing and sieving. The device comprises a sieving device, the screening device is composed of a guide pipe (5) vertically fixed to the machine frame, a sliding rod (4) penetrating through the guide pipe from bottom to top and perpendicularly and fixedly connected with the connecting rod (2), a sliding pin (3) penetrating through a sliding groove (15) in the connecting rod (2) and hinged to the rotary disc (1), a motor (14) driving the rotary disc (1) to rotate, a mesh screen fixed to the lower portion of the guide pipe (5) and a pull rope (6) connected between the bottom of the mesh screen and the sliding rod (4). According to the utility model, the production process can be effectively simplified, the product quality and the production efficiency can be improved, and the environmental pollution can be prevented. The mixing device is a special mixing device for preparing the piezoelectric ceramic piece.

Description

Technical Field

[0001] The utility model relates to a mixing and screening device, in particular to an integrated device for uniformly mixing piezoelectric ceramic sheet green bodies with insulating powder and screening out excess insulating powder. Background Art

[0002] Before sintering, the piezoelectric ceramic sheet needs to be fully mixed with the adhesive powder to avoid the piezoelectric ceramic sheets sticking to each other after sintering. During the powder mixing process, if the adhesive powder attached to the surface of the piezoelectric ceramic sheet is too little or uneven, the piezoelectric ceramic sheet will easily stick and be difficult to peel after sintering, resulting in an increase in the product failure rate; if the adhesive powder attached to the surface of the piezoelectric ceramic sheet is too much, impurities will appear on the surface of the sintered product, the surface will be uneven, and the appearance will be unqualified. Therefore, it is necessary not only to ensure that the piezoelectric ceramic sheet green body and the adhesive powder are fully mixed, but also to remove the excess adhesive powder.

[0003] In order to ensure that a thin layer of isolating powder can be evenly attached to the surface of the piezoelectric ceramic green body, the current powder mixing process is: put the piezoelectric ceramic green body into a box, add the isolating powder, and then stir and mix it manually. After the powder mixing is completed, transfer it to a vibrating screen to screen out excess isolating powder. This method has the following disadvantages:

[0004] 1) The manual stirring and mixing process is not only labor-intensive and inefficient, but also fingers are easily scratched by the thin and brittle piezoelectric ceramic green sheets, and it is easy to generate dust, which is harmful to the health of the operator.

[0005] 2) Manual stirring and mixing of powder is not only cumbersome, but also the mixing uniformity is easily affected by human factors such as the operator's proficiency and technical experience, resulting in unstable product quality.

[0006] 3) The vibration and impact of the screening machine can easily cause damage to the piezoelectric ceramic green sheet.

[0007] 4) No dust prevention device is set during the vibration screening process, and dust can easily pollute the surrounding environment. Utility Model Content

[0008] In view of the defects existing in the prior art, the utility model aims to provide an integrated device for mixing and screening green powder of piezoelectric ceramic sheets, which integrates mixing and screening.

[0009] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a screening device; the screening device is composed of a guide tube vertically fixed on the frame, a sliding rod passing through the guide tube from bottom to top and vertically fixed to the connecting rod, a sliding pin passing through a sliding groove on the connecting rod and hinged to the turntable, a motor driving the turntable to rotate, a mesh screen fixed under the guide tube, and a pull rope connected between the bottom of the mesh screen and the sliding rod.

[0010] The mesh screen is composed of an annular screen frame fixedly connected to the bottom of the guide tube through a hanger, and a flexible screen mesh having an inverted cone-shaped pocket structure fixedly connected to the screen frame. The lower end of the pull rope is fixedly connected to the center of the bottom of the flexible screen mesh.

[0011] A dust bag covering the mesh screen is fixed on the guide tube.

[0012] Compared with the prior art, the utility model adopts the above technical solution, and uses the pull rope to drive the bottom of the flexible screen with an inverted cone-shaped pocket structure to reciprocate up and down, which can not only simulate the two hands to repeatedly stir and mix the materials up and down to ensure uniform mixing, but also has the following advantages:

[0013] 1) It eliminates the defects of manual stirring and mixing of powder, such as high labor intensity, easy dust generation, and easy scratching of fingers by piezoelectric ceramic green sheets.

[0014] 2) It can not only avoid manual operation being easily affected by human factors such as operator proficiency and technical experience, and stabilize product quality, but also reduce labor and improve production efficiency.

[0015] 3) Combining the powder mixing process with the screening process can not only omit the operation process of transferring the piezoelectric ceramic green body to the vibrating screen machine and further improve productivity, but also because the bottom of the flexible screen moves up and down at a uniform speed, it can effectively eliminate the defect of the traditional screening machine that causes damage to the piezoelectric ceramic green body due to vibration impact.

[0016] 4) A dust bag is set up to cover the entire mesh screen, which can not only prevent dust pollution, but also collect the separation powder that falls through the screen to avoid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 A-direction partial view.

[0019] In the figure: turntable 1, connecting rod 2, sliding pin 3, sliding rod 4, guide tube 5, pull rope 6, screen frame 7, flexible screen 8, dust bag 9, base 10, stand 11, hanger 12, bracket 13, motor 14, slide chute 15. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figures 1-2As shown: a screening device is fixed on the frame. The frame is composed of a stand 11 fixed on a base 10. The screening device is composed of a guide tube 5 vertically welded to the side of the stand 11 through a bracket 13, a slide bar 4 passing through the guide tube from bottom to top, a connecting rod 2 vertically welded to the upper end of the slide bar to form a "T"-shaped structure, a sliding pin 3 passing through the slide slot 15 on the connecting rod and hinged to the turntable 1, a motor 14 fixed to the top of the stand 11 and driving the turntable 1 to rotate, a mesh screen located below the guide tube 5 and welded to the guide tube through a hanger 12, and a pull rope 6 connected between the bottom of the mesh screen and the slide bar 4.

[0022] In order to ensure uniform powder mixing and achieve a better powder mixing effect, the mesh screen is composed of a circular screen frame 7 welded to a hanger 12, a flexible screen 8 having an inverted cone-shaped pocket structure and fixedly connected to the screen frame, and the lower end of the pull rope 6 is fixedly connected to the center of the bottom of the flexible screen. The flexible screen 8 is woven from nylon wire.

[0023] In order to reduce dust pollution and collect the sieve-falling anti-sticking powder, a dust bag 9 covers the mesh screen from bottom to top, and the bag opening of the dust bag is fixed to the guide tube 5 by a strapping tape (not shown in the figure).

[0024] Working principle: Add the piezoelectric ceramic green sheets and the isolation powder into the mesh screen, and tie the bag mouth of the dust bag 9 to the guide tube 5. Turn on the power, the motor 14 drives the turntable 1 to rotate, and the sliding pin 3 drives the sliding rod 4 to make a uniform up and down reciprocating motion in the guide tube 5 through the connecting rod 2. The sliding rod 4 repeatedly lifts the bottom of the flexible screen 8 upward through the pull rope 6. Therefore, not only can the piezoelectric ceramic green sheets and the isolation powder be uniformly "stirred" and mixed from bottom to top and from inside to outside in the flexible screen 8, but the repeated "stirring" and mixing process is also the screening process. After the screening is completed, untie the bag mouth of the dust bag 9 and take the piezoelectric ceramic green sheets out of the mesh screen.

Claims

1. A piezoelectric ceramic sheet green body powder mixing and screening integrated device, comprising a screening device; characterized in that: The screening device comprises a guide tube (5) vertically fixed on a frame, a slide rod (4) passing through the guide tube from bottom to top and vertically fixedly connected to a connecting rod (2), a slide pin (3) passing through a slide groove (15) on the connecting rod (2) and hinged to a turntable (1), a motor (14) for driving the turntable (1) to rotate, a mesh screen fixed below the guide tube (5), and a pull rope (6) connected between the bottom of the mesh screen and the slide rod (4).

2. The integrated device for mixing powder and screening green body of piezoelectric ceramic sheets according to claim 1, characterized in that: The mesh screen is composed of a circular screen frame (7) fixedly connected to the bottom of the guide tube (5) through a hanger (12), a flexible screen (8) having an inverted cone-shaped pocket structure and fixedly connected to the screen frame, and the lower end of the pull rope (6) is fixedly connected to the center of the bottom of the flexible screen.

3. The integrated device for mixing powder and screening green body of piezoelectric ceramic sheets according to claim 1 or 2, characterized in that: A dust bag (9) covering the mesh screen is fixed on the guide tube (5).

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