Device for measuring air permeability of raw ceramic chip

Abstract

The utility model relates to the technical field of air permeability measuring instruments, and discloses a raw ceramic chip air permeability measuring device which comprises an objective table, a support, a vacuum pump, a flow sensor, a pressure sensor and a pressing assembly, the interior of the objective table is hollow, a first opening is formed in the upper end of the objective table, and the vacuum pump is located in the objective table; the first opening is communicated with an air inlet of the vacuum pump, an elastic supporting pad used for placing a substrate to be tested is embedded in the first opening, the flow sensor and the pressure sensor are arranged at the position, close to the first opening, in the objective table, the support is arranged on the objective table, and the vacuum pump is arranged on the support. The support is vertically provided with the pressing assembly, the pressing assembly is located right above the first opening, and the beneficial effects of the utility model are that the measuring difficulty is reduced, the detection efficiency is improved, and the mass production detection requirements of the ceramic green ceramic chips can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of air permeability measuring instruments, in particular to a substrate air permeability measuring device. Background Art

[0002] At present, HTCC, LTCC and other ceramic green sheets are generally made of multi-layer ceramic green sheets using a stacking process. During the stacking process, if air or impurities are not discharged, bubbles will be formed inside the ceramic green sheets, affecting the quality of the ceramic green sheets. The yield rate of ceramic green sheets is generally tested by the air permeability parameters of the ceramic green sheets, that is, a pressure difference is formed on the upper and lower sides of the ceramic green sheets, and the air permeability of the ceramic green sheets is evaluated by the flow rate of gas passing through the ceramic green sheets per unit time. In the prior art, the air permeability is generally tested manually, which has high labor costs, complicated operations, and low detection efficiency, and cannot meet the mass production detection needs of ceramic green sheets. Utility Model Content

[0003] The purpose of the utility model is to provide a ceramic green tile air permeability measuring device, which reduces the measurement difficulty, improves the detection efficiency, and can meet the mass production detection needs of ceramic green tiles.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a ceramic green tile air permeability measuring device, comprising a stage, a bracket, a vacuum pump, a flow sensor, a pressure sensor, and a clamping assembly, wherein the stage is hollow inside and has a first opening at the upper end, the vacuum pump is located inside the stage, the first opening is communicated with the air inlet of the vacuum pump, an elastic support pad for placing a substrate to be measured is embedded in the first opening, the flow sensor and the pressure sensor are arranged inside the stage near the first opening, the bracket is arranged on the stage, the clamping assembly is vertically mounted on the bracket, and the clamping assembly is located directly above the first opening;

[0005] Wherein, the substrate to be tested is placed horizontally on the elastic support pad and the first opening is closed, the output end of the clamping assembly is arranged against the upper end surface of the substrate to be tested, the vacuum pump draws a vacuum to form a negative pressure at the first opening, the flow sensor measures the air flow at the first opening, and the pressure sensor measures the air pressure at the first opening.

[0006] Furthermore, the clamping assembly includes a clamping cylinder, a connecting frame, a gasket and a dust filter. The clamping cylinder is vertically mounted on the bracket. The connecting frame is fixed to the output end of the clamping cylinder. The connecting frame is hollow inside and has a second opening at the lower end. The second opening is coaxially arranged with the first opening. The dust filter is embedded in the second opening. The gasket is fitted at the lower end of the connecting frame. The clamping cylinder drives the connecting frame to move in a vertical direction so that the gasket is against the upper end surface of the substrate to be tested.

[0007] Furthermore, the clamping assembly also includes a connecting plate, a T-shaped guide column and a spring. The output end of the clamping cylinder is fixed to the connecting plate, the T-shaped guide column is symmetrically fixed to the upper end of the connecting frame, the T-shaped guide column and the connecting plate are slidably connected through bearings, the spring is sleeved on the T-shaped guide column, one end of the spring is against the upper end surface of the connecting frame, and the other end is against the lower end surface of the connecting plate, and the spring has a tendency to push the connecting frame to move downward.

[0008] Furthermore, the bracket includes two vertical plates and a mounting plate, the two vertical plates are spaced apart at both ends of the loading platform along the length direction of the mounting plate, the mounting plate is used to connect the two vertical plates, and the clamping assembly is fixedly mounted on the mounting plate.

[0009] Furthermore, a foot pad is provided at the bottom of the loading platform.

[0010] Furthermore, a touch screen is provided on the front side of the stage, and the touch screen is electrically connected to the flow sensor, the pressure sensor, the vacuum pump and the clamping assembly.

[0011] Furthermore, the loading platform is provided with a two-hand start button, a reset button and an emergency stop button.

[0012] Furthermore, handles are provided on the side walls at both ends of the loading platform.

[0013] Compared with the prior art, the invention discloses a device for measuring the air permeability of ceramic raw tiles, and its beneficial effects are as follows: an elastic support pad is embedded in the first opening, and when testing the substrate to be tested, the substrate to be tested is placed horizontally on the elastic support pad to close the first opening, and the output end of the clamping assembly is against the upper end surface of the substrate to be tested to ensure that the first opening is sealed, and the first opening is connected to the air inlet of the vacuum pump. When the vacuum pump starts to draw a vacuum, since the upper end of the substrate to be tested is at atmospheric pressure and the lower end is at vacuum, there is a pressure difference between the upper and lower end surfaces of the substrate to be tested, and a negative pressure can be formed at the first opening. The flow sensor measures the air flow at the first opening, and the pressure sensor measures the air pressure at the first opening, and the air permeability of the ceramic raw tile can be measured, which reduces the measurement difficulty, improves the detection efficiency, and can meet the mass production detection needs of ceramic raw tiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a device for measuring air permeability of ceramic green sheets according to an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the stage of the ceramic green tile air permeability measuring device according to the embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of a pressing assembly of a ceramic green tile air permeability measuring device according to an embodiment of the utility model;

[0017] Figure 4 It is an exploded view of the parts of the pressing assembly of the ceramic green tile air permeability measuring device according to the embodiment of the utility model.

[0018] In the figure, 1, the loading platform; 11, the first opening; 12, the elastic support pad; 2, the bracket; 21, the vertical plate; 22, the mounting plate; 3, the clamping assembly; 31, the clamping cylinder; 32, the connecting frame; 33, the gasket; 34, the dust filter; 321, the second opening; 35, the connecting plate; 36, the T-shaped guide column; 37, the spring; 4, the foot pad; 5, the touch screen; 6, the two-hand start button; 7, the reset button; 8, the emergency stop button; 9, the handle; 10, the handle; a, the substrate to be tested. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship 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 referred devices and elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0022] like Figure 1 As shown, a ceramic green tile air permeability measuring device according to a preferred embodiment of the utility model comprises a stage 1, a bracket 2, a vacuum pump, a flow sensor, a pressure sensor, and a clamping assembly 3, wherein, in order to facilitate the formation of a pressure difference between the upper and lower end surfaces of the substrate a to be tested, in this embodiment, the stage 1 is hollow inside and a first opening 11 is provided at the upper end, the vacuum pump is located inside the stage 1, and the first opening 11 is connected to the air inlet of the vacuum pump; further, in order to avoid the wear of the surface of the substrate a to be tested when the substrate a to be tested is placed, thereby affecting the detection effect, an elastic support pad 12 for placing the substrate a to be tested is embedded in the first opening 11, and the elastic support pad 12 can be made of rubber or silicone products, and a flow sensor and a pressure sensor are provided inside the stage 1 near the first opening 11, and since the vacuum pump, the flow sensor and the pressure sensor are all common components and are installed inside the stage 1, they are not shown in the figure. The bracket 2 is arranged on the stage 1. In order to seal the first opening 11 after the substrate a to be tested is placed on the elastic support pad 12, a clamping assembly 3 is vertically installed on the bracket 2, and the clamping assembly 3 is located directly above the first opening 11. In the actual measurement process, the substrate a to be tested is horizontally placed on the elastic support pad 12, and the first opening 11 is closed. The output end of the clamping assembly 3 is set against the upper end surface of the substrate a to be tested, and the vacuum pump is evacuated to form a negative pressure at the first opening 11. The flow sensor measures the air flow at the first opening 11, and the pressure sensor measures the air pressure at the first opening 11, so as to detect the air permeability of the ceramic green tile.

[0023] Furthermore, in order to prevent the lower end surface of the substrate a to be tested from being in hard contact with the upper end surface of the stage 1 after the pressing assembly 3 presses the substrate a to be tested, thereby causing damage to the substrate a to be tested, therefore, in this embodiment, refer to Figure 2The elastic support pad 12 is annular and is installed in the first opening 11. The upper end surface of the elastic support pad 12 is 1-2 mm higher than the upper end surface of the stage 1. That is, when the clamping assembly 3 presses the substrate a to be tested, the elastic support pad 12 can be deformed to a certain extent to always avoid contact between the substrate a to be tested and the stage 1.

[0024] Further, in order to facilitate the design of the pressing assembly 3, refer to Figure 3 The clamping assembly 3 includes a clamping cylinder 31, a connecting frame 32, a gasket 33 and a dust filter 34, wherein the clamping cylinder 31 is vertically mounted on the bracket 2, and a connecting frame 32 is fixed to the output end thereof. The connecting frame 32 is cylindrical in shape, hollow inside and provided with a second opening 321 at the lower end, and the second opening 321 is coaxially arranged with the first opening 11. In order to avoid the formation of negative pressure between the upper and lower end surfaces of the substrate a to be measured, impurities in the air are gathered above the substrate a to be measured due to the negative pressure, and attached to the substrate a to be measured, affecting the measurement effect of the substrate a to be measured, therefore, a dust filter 34 is embedded in the second opening 321. Furthermore, in order to avoid crushing the substrate a to be measured, a gasket 33 is fitted at the lower end of the connecting frame 32, and the clamping cylinder 31 drives the connecting frame 32 to move in the vertical direction, so that the gasket 33 is set against the upper end surface of the substrate a to be measured. The gasket 33 is made of a flexible material such as rubber or silicone and can be deformed to a certain extent. To facilitate replacement of the gasket 33 and connection between the connecting frame 32 and the gasket 33 , the gasket 33 and the connecting frame 32 can be fixed with an adhesive.

[0025] Furthermore, in order to prevent the force provided by the pressing cylinder 31 from directly acting on the substrate a to be tested and causing damage to the substrate a to be tested, therefore, referring to Figure 3 , Figure 4 The clamping assembly 3 also includes a connecting plate 35, a T-shaped guide post 36 and a spring 37. The output end of the clamping cylinder 31 is fixed to the connecting plate 35. The upper end of the connecting frame 32 is symmetrically fixed with a T-shaped guide post 36. The T-shaped guide post 36 and the connecting plate 35 are slidably connected through a bearing. A spring 37 is sleeved on the T-shaped guide post 36. One end of the spring 37 is against the upper end surface of the connecting frame 32, and the other end is against the lower end surface of the connecting plate 35. The spring 37 has a tendency to push the connecting frame 32 to move downward. That is, in the process of clamping the substrate a to be tested, the spring 37 can form a certain buffer force to avoid damage to the substrate a to be tested.

[0026] Furthermore, in order to facilitate the design of the bracket 2 and simplify the structure of the bracket 2, specifically, refer to Figure 1The bracket 2 includes two vertical plates 21 and a mounting plate 22, wherein the two vertical plates 21 are spaced apart at both ends of the stage 1 along the length direction of the mounting plate 22, the mounting plate 22 is used to connect the two vertical plates 21, and the clamping assembly 3 is fixedly mounted on the mounting plate 22. In order to facilitate the limiting of the installation of the vertical plates 21, a limiting groove is also provided on the stage 1.

[0027] In some embodiments, see Figure 1 , Figure 2 In order to facilitate the support of the stage 1, a foot pad 4 is provided at the bottom of the stage 1. At the same time, in order to facilitate the transportation of the entire device, handles 9 are provided on the side walls at both ends of the stage 1. In addition, a handle 10 is provided on the bracket 2, which makes the transportation more flexible. Further, in order to facilitate the setting of the measurement pressure, gas flow rate, vacuum pump, and clamping cylinder 31 of the substrate a to be tested, a touch screen 5 is provided on the front side of the stage 1. The touch screen 5 is electrically connected to the flow sensor, pressure sensor, vacuum pump, and clamping assembly 3. The setting can be performed by adjusting the corresponding parameters on the touch screen 5, which is convenient for device debugging. In addition, in order to facilitate the start-up operation of the device, a two-hand start button 6, a reset button 7, and an emergency stop button 8 are provided on the stage 1. When the substrate a to be tested needs to be tested, the substrate a to be tested is placed on the elastic support pad 12, and both hands are pressed at the same time. The two-hand start button 6 can be pressed when the device needs to be reset, and the reset button 7 can be pressed. When the device needs to be stopped urgently, the emergency stop button 8 can be pressed.

[0028] In summary, the embodiment of the utility model provides a device for measuring the air permeability of ceramic raw porcelain sheets, wherein an elastic support pad 12 is embedded in a first opening 11. When testing the substrate a to be tested, the substrate a to be tested is placed horizontally on the elastic support pad 12 to close the first opening 11. The output end of the clamping assembly 3 is against the upper end surface of the substrate a to be tested to ensure that the first opening 11 is sealed. The first opening 11 is connected to the air inlet of the vacuum pump. When the vacuum pump starts to evacuate, since the upper end of the substrate a to be tested is at atmospheric pressure and the lower end is at vacuum, there is a pressure difference between the upper and lower end surfaces of the substrate a to be tested, and a negative pressure can be formed at the first opening 11. The flow sensor measures the air flow at the first opening 11, and the pressure sensor measures the air pressure at the first opening 11, thereby measuring the air permeability of the ceramic raw porcelain sheet, thereby reducing the measurement difficulty, improving the detection efficiency, and meeting the mass production detection needs of ceramic raw porcelain sheets.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A device for measuring air permeability of ceramic green sheets, characterized in that: The device comprises a stage, a bracket, a vacuum pump, a flow sensor, a pressure sensor, and a clamping assembly. The stage is hollow inside and has a first opening at the upper end. The vacuum pump is located inside the stage. The first opening is communicated with an air inlet of the vacuum pump. An elastic support pad for placing a substrate to be tested is embedded in the first opening. The flow sensor and the pressure sensor are arranged inside the stage near the first opening. The bracket is arranged on the stage. The clamping assembly is vertically mounted on the bracket. The clamping assembly is located directly above the first opening. Wherein, the substrate to be tested is placed horizontally on the elastic support pad and the first opening is closed, the output end of the clamping assembly is arranged against the upper end surface of the substrate to be tested, the vacuum pump draws a vacuum to form a negative pressure at the first opening, the flow sensor measures the air flow at the first opening, and the pressure sensor measures the air pressure at the first opening.

2. The ceramic green sheet air permeability measuring device according to claim 1, characterized in that: The clamping assembly includes a clamping cylinder, a connecting frame, a gasket and a dust filter. The clamping cylinder is vertically installed on the bracket. The connecting frame is fixed to the output end of the clamping cylinder. The connecting frame is hollow inside and has a second opening at the lower end. The second opening is coaxially arranged with the first opening. The dust filter is embedded in the second opening. The gasket is fitted at the lower end of the connecting frame. The clamping cylinder drives the connecting frame to move in the vertical direction so that the gasket is against the upper end surface of the substrate to be tested.

3. The ceramic green sheet air permeability measuring device according to claim 2, characterized in that: The clamping assembly also includes a connecting plate, a T-shaped guide column and a spring. The output end of the clamping cylinder is fixed to the connecting plate. The T-shaped guide column is symmetrically fixed to the upper end of the connecting frame. The T-shaped guide column and the connecting plate are slidably connected through bearings. The spring is sleeved on the T-shaped guide column. One end of the spring is against the upper end surface of the connecting frame, and the other end is against the lower end surface of the connecting plate. The spring has a tendency to push the connecting frame to move downward.

4. The ceramic green sheet air permeability measuring device according to claim 1, characterized in that: The bracket includes two vertical plates and a mounting plate. The two vertical plates are spaced apart at both ends of the loading platform along the length direction of the mounting plate. The mounting plate is used to connect the two vertical plates. The clamping assembly is fixedly mounted on the mounting plate.

5. The ceramic green sheet air permeability measuring device according to claim 1, characterized in that: A foot pad is provided at the bottom of the loading platform.

6. The ceramic green sheet air permeability measuring device according to claim 1, characterized in that: A touch screen is provided on the front side of the stage, and the touch screen is electrically connected to the flow sensor, the pressure sensor, the vacuum pump and the pressing assembly.

7. The ceramic green sheet air permeability measuring device according to claim 1, characterized in that: The loading platform is provided with a two-hand start button, a reset button and an emergency stop button.

8. The ceramic green sheet air permeability measuring device according to claim 1, characterized in that: Handles are arranged on the side walls at both ends of the loading platform.

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