Open density test fixture
The test fixture with a sliding block and filter net structure addresses the issue of particle size control in powder density measurement, ensuring stable and accurate results by filtering out agglomerated or large particles.
Patent Information
- Application Number
- CN202422252425.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The prior art cannot effectively control the particle size of the powder, resulting in the agglomeration of the powder or the mixing of large particles affecting the stability of the loose density test.
A loose density test fixture is designed, including a base, slider, filter mesh, material holder and tray. The slider moves on the slide rail, so that the powder material falls into the tray through the filter mesh and leaking holes, filters the powder particles under the specified particle size, and tests of different particle sizes are achieved by replacing the filter mesh.
The loose density test of powders with specified particle sizes is realized, avoiding the influence of powder clumping or mixing with large particles, and it is convenient to replace filters with different particle sizes, improving the stability and convenience of testing.
Smart Images
Figure CN223107537U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of powder testing, in particular to a fixture for testing apparent density. Background Technique
[0002] The apparent density of powders is the bulk density measured after powders freely fill a standard container under specified conditions, that is, the mass per unit volume when powders are loosely filled, expressed in g / cm3, and it is a process property of powders. The apparent density is a comprehensive manifestation of various properties of powders, which is very important for the stability of the production process of powder metallurgy mechanical parts and the control of product quality, and is also the basis for mold design.
[0003] There are three methods for measuring the apparent density of powders: (1) funnel method; (2) Scott volumeter method; (3) vibrating funnel method. Among them, (1) in the funnel method, powders freely fall from the funnel hole at a certain height to fill the cup. (2) In the Scott volumeter method, powders are placed on the bracket of the upper combined funnel and flow into the cloth box freely or by external force, alternately passing through 4 glass plates with an inclination angle of 25° and a square funnel in the cloth box, and finally freely fall from the funnel hole at a certain height to fill the cup. (3) In the vibrating funnel method, powders are loaded into a funnel with a vibrating device and vibrated under certain conditions. With the help of vibration, powders freely fall from the funnel hole at a certain height to fill the cup. For powders that can flow freely under specific conditions, the funnel method is adopted; for non-free-flowing powders, the latter two methods are adopted.
[0004] The testing methods in the background technique can measure the density of powders with a fixed volume, but cannot control the particle size passing through the testing fixture. Powders with different particle sizes have great differences in apparent density, and there may be situations such as powder agglomeration or mixing with large-particle powders during transportation, which affect the stability of apparent density testing.
[0005] Therefore, a screening structure needs to be provided to test the apparent density of powders with a specified particle size. In view of this, a new technical solution is needed to solve the above technical problems. Content of the Utility Model
[0006] The purpose of the utility model is to provide a fixture for testing apparent density to solve the problems such as powder agglomeration or mixing with large-particle powders affecting the testing stability in the prior art.
[0007] To achieve the above purpose, the utility model adopts the following technical means:
[0008] A loose bulk density test fixture, comprising a base, a slider, a filter screen, a material holding member and a tray. The base is provided with a first material leakage hole and two parallel slide rails arranged on both sides of the first material leakage hole. The slider is installed on the slide rails and can move along the slide rails. The slider is provided with a second material leakage hole. The filter screen is arranged on the slider and is fixed to the slider through the material holding member. The material holding member and the filter screen jointly form a feeding bin for holding powder materials. The tray is arranged on the base and can be pulled out from the base. By moving the slider back and forth on the slide rails, the powder materials in the feeding bin fall into the tray after passing through the filter screen, the second material leakage hole and the first material leakage hole.
[0009] In the utility model, by moving the slider back and forth on the slide rails, powder agglomeration or large particle powder mixed in the transportation process may be left in the feeding bin, so that the powder particles under the specified particle size of the filter screen fall into the tray, thereby obtaining the loose bulk density of the particles under the corresponding particle size; by separating the material holding member from the slider, it is convenient to replace filter screens with different particle sizes, which is convenient and fast.
[0010] As a further improvement, a pulling slot is arranged below the base. The pulling slot is communicated with the first material leakage hole. At least two supporting members are installed below the base. The two supporting members are respectively arranged on both sides of the pulling slot and limit the tray. The tray is pushed and pulled in the space formed by the pulling slot and the two supporting members.
[0011] As a further improvement, a limiting member is arranged on one side of the base at the pulling slot. When the tray is inserted into the inside of the pulling slot, it abuts against the limiting member.
[0012] As a further improvement, the limiting member is a limiting screw.
[0013] As a further improvement, the base further includes an overflow area, and the slide rail extends to the overflow area.
[0014] As a further improvement, the material holding member is an annular frame or a rectangular frame, and an annular or rectangular convex portion is arranged below the material holding member; the slider is an annular frame or a rectangular frame, and an annular or rectangular groove is arranged above the slider; the convex portion is inserted into the groove, and the filter screen is arranged between the convex portion and the groove and is positioned by the convex portion and the groove.
[0015] As a further improvement, the material holding member and the slider are fixed by screws.
[0016] As a further improvement, a handle is arranged at one end of the tray. Preferably, the tray is a pull screw.
[0017] Compared with the prior art, the utility model brings the following technical effects:
[0018] In the utility model, the slider moves back and forth on the slide rail, so that the powder agglomeration or large particle powder that may exist during transportation is left in the feeding bin, and the powder particles with a specified particle size under the filter screen fall into the tray, thereby obtaining the loose bulk density of the particles with the corresponding particle size; separating the material holding part from the slider facilitates the replacement of filter screens with different particle sizes, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0020] Figure 1 Shows the structural schematic diagram of the loose bulk density test fixture;
[0021] Figure 2 Shows the structural schematic diagram of another angle of the loose bulk density test fixture;
[0022] Figure 3 Shows Figure 1 The exploded structural schematic diagram of the loose bulk density test fixture;
[0023] Figure 4 Shows Figure 1 The sectional view of the loose bulk density test fixture;
[0024] Figure 5 Shows Figure 1 The sectional view of another angle of the loose bulk density test fixture.
[0025] MAIN SYMBOL DESCRIPTION OF ELEMENTS:
[0026] 1 - Base; 11 - First leakage hole; 12 - Slide rail; 13 - Pull-out groove; 14 - Overflow area; 2 - Slider; 21 - Second leakage hole; 22 - Groove; 3 - Filter screen; 4 - Material holding part; 41 - Convex part; 5 - Tray; 6 - Support part; 7 - Limiting part; 8 - Handle. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] The following will describe in detail the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.
[0028] A loose density test fixture, comprising a base, a slider, a filter screen, a material holding member and a tray. The base is provided with a first material leakage hole and two parallel slide rails arranged on both sides of the first material leakage hole. The slider is installed on the slide rails and can move along the slide rails. The slider is provided with a second material leakage hole. The filter screen is arranged on the slider and is fixed to the slider through the material holding member. The material holding member and the filter screen together form a material feeding bin for holding powder. The tray is arranged on the base and can be pulled out from the base. By moving the slider back and forth on the slide rails, the powder in the material feeding bin falls into the tray after passing through the filter screen, the second material leakage hole and the first material leakage hole.
[0029] In the utility model, by moving the slider back and forth on the slide rails, powder agglomeration or large particle powder mixed in the transportation process is left in the material feeding bin, so that the powder particles under the specified particle size of the filter screen fall into the tray, thereby obtaining the loose density of the particles under the corresponding particle size. By separating the material holding member from the slider, it is convenient to replace the filter screens with different particle sizes, which is convenient and fast.
[0030] Embodiment
[0031] Please refer to Figures 1 to 5 , the utility model provides a loose density test fixture, comprising a base 1, a slider 2, a filter screen 3, a material holding member 4 and a tray 5. The base 1 is provided with a first material leakage hole 11 and two parallel slide rails 12 arranged on both sides of the first material leakage hole 11. The slider 2 is installed on the slide rails 12 and can move along the slide rails 12. The slider 2 is provided with a second material leakage hole 21. The filter screen 3 is arranged on the slider 2 and is fixed to the slider 2 through the material holding member 4. The material holding member 4 and the filter screen 3 together form a material feeding bin for holding powder. The tray 5 is arranged on the base 1 and can be pulled out from the base 1. By moving the slider 2 back and forth on the slide rails 12, the powder in the material feeding bin falls into the tray 5 after passing through the filter screen 3, the second material leakage hole 21 and the first material leakage hole 11. Among them, the mesh number of the sieve mesh of the filter screen 3 is generally selected as 100 meshes, 150 meshes, 200 meshes and 300 meshes, and the filter screen 3 can select sieve holes under different particle sizes.
[0032] More specifically, please refer to Figure 2 , Figure 3 and Figure 5 , a pull-out groove 13 is arranged below the base 1, the pull-out groove 13 is communicated with the first material leakage hole 11, and three support members 6 are installed below the base 1. Among them, two support members 6 are respectively arranged on both sides of the pull-out groove 13 to limit the tray 5, and the tray 5 is pushed and pulled in the space formed by the pull-out groove 13 and the two support members 6. It can be understood that the support member 6 can also be integrally formed with the base 1, which is convenient for the insertion and extraction of the tray 5. Compared with the separated design, the cost of integral forming is higher.
[0033] More specifically, please refer to Figure 3 and Figure 5 , on one side of the drawing slot 13 of the base 1, a limiting member 7 is provided. When the tray 5 is inserted into the interior of the drawing slot 13, it abuts against the limiting member 7. The limiting member 7 can limit the movement of the tray 5 within the drawing slot 13 to prevent it from exceeding the other end of the drawing slot 13. It can be understood that the limiting member 7 can also be integrally formed with the base 1. Compared with the separate design, the cost of integral formation is higher. Preferably, the limiting member 7 is a limiting screw, and the limiting screw can be arranged in different limiting screw holes on the base 1 according to different needs, and the operation is simple and convenient.
[0034] More specifically, please refer to Figure 1 and Figure 3 , the base 1 further includes an overflow area 14, and the slide rail 12 extends to the overflow area 14. The overflow area 14 can carry the excess powder after the feeding bin is filled.
[0035] More specifically, please refer to Figure 3 , Figure 4 and Figure 5 , the material holding member 4 is an annular frame or a rectangular frame, and a convex portion 41 in an annular or square shape is provided below the material holding member 4; the slider 2 is an annular frame or a rectangular frame, and a groove 22 in an annular or square shape is provided above the slider 2; when the material holding member 4 and the slider 2 are assembled, first lay the filter screen 3 on the slider 2, and the filter screen 3 is located between the convex portion 41 and the groove 22. While the convex portion 41 is inserted into the groove 22, the filter screen 3 is embedded into the groove 22 for positioning.
[0036] More specifically, please refer to Figure 3 , Figure 4 and Figure 5 , the material holding member 4 and the slider 2 are fixed by screws. When it is necessary to replace the filter screen 3 with different pore diameters, only need to remove the screws between the material holding member 4 and the slider 2 to separate them, place a new filter screen 3 again and then place the material holding member 4 on the filter 3, and fix it with screws. The same test fixture can realize the test of the loose bulk density of powder particles with different particle sizes.
[0037] More specifically, please refer to Figure 1 , Figure 3 and Figure 5 , a handle 8 is provided at one end of the tray 5. It can be understood that the handle 8 can also be integrally formed with the tray 5. Compared with the separate design, the cost of integral formation is higher. Preferably, the handle 8 is a draw screw and is fixed to the tray 5 by means of threaded connection.
[0038] After the utility model screens out large-particle-size powder particles through the filter screen 3 and measures a certain volume of powder, the tray 5 is pulled out to take out the powder, which is collected in a container and weighed using an electronic balance. According to ρ = m / V, the bulk density of the particles under the corresponding particle size can be calculated.
[0039] In the utility model, the slider moves back and forth on the slide rail, leaving the powder agglomeration or large-particle powder that may exist during transportation in the feeding bin, so that the powder particles under the specified particle size of the filter screen fall into the tray, thereby obtaining the bulk density of the particles under the corresponding particle size; separating the material receiving part from the slider facilitates replacing the filter screens with different particle sizes, which is convenient and fast.
[0040] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0041] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the utility model.
Claims
1. A loose density test fixture, characterized in that: It includes a base, a slider, a filter screen, a material holding member and a tray. The base is provided with a first material leakage hole and two parallel slide rails arranged on both sides of the first material leakage hole. The slider is installed on the slide rails and can move along the slide rails. The slider is provided with a second material leakage hole. The filter screen is arranged on the slider and is fixed to the slider through the material holding member. The material holding member and the filter screen jointly form a feeding bin for holding powder materials. The tray is arranged on the base and can be pulled out from the base. By moving the slider back and forth on the slide rails, the powder materials in the feeding bin fall into the tray through the filter screen, the second material leakage hole and the first material leakage hole.
2. The loose density test fixture according to claim 1, wherein: A pull-out groove is provided below the base. The pull-out groove is communicated with the first material leakage hole. At least two support members are installed below the base. The two support members are respectively arranged on both sides of the pull-out groove and limit the tray. The tray is pushed and pulled within the space formed by the pull-out groove and the two support members.
3. The loose bulk density test fixture according to claim 2, wherein: A limiting member is arranged on one side of the base at the pull-out groove. When the tray is inserted into the interior of the pull-out groove, it abuts against the limiting member.
4. The loose bulk density test fixture according to claim 3, characterized in that: The limiting member is a limiting screw.
5. The loose bulk density test fixture according to claim 1, characterized in that: The base further includes an overflow area. The slide rails extend to the overflow area.
6. The loose bulk density test fixture according to claim 1, wherein: The material holding member is an annular frame or a rectangular frame. An annular or rectangular convex portion is provided below the material holding member. The slider is an annular frame or a rectangular frame. An annular or rectangular groove is provided above the slider. The convex portion is inserted into the groove. The filter screen is arranged between the convex portion and the groove and is positioned through the convex portion and the groove.
7. The loose density test fixture according to claim 1, characterized in that: The material holding member and the slider are fixed by screws.
8. The loose bulk density test fixture according to claim 1, characterized in that: A handle is provided at one end of the tray.