CN114636640A - Device and method for testing density of high-viscosity adhesive - Google Patents

Abstract

The invention relates to a device and a method for testing the density of a high-viscosity adhesive, which relate to the field of adhesive testing and comprise a glue container assembly, a glue injection buffer assembly, a density testing assembly and a glue overflow removing assembly; the glue container assembly comprises a glue container, a glue outlet pipe and a propeller; the glue injection buffer assembly comprises a buffer tank, a first conical channel and a first platform; the inner wall of the buffer tank is connected with the outer wall of the glue outlet pipe; the first conical channel is arranged at the bottom of the buffer tank; the first platform is arranged at the bottom of the first conical channel; the density testing component comprises a measuring pipe, a second platform and a third platform; the second platform is arranged at the top of the measuring pipe; the third platform is arranged at the bottom of the measuring pipe; the overflow glue removing assembly comprises a fourth platform; the upper surface and the lower surface of the fourth platform are respectively provided with a fifth through hole and a sixth through hole; a second conical channel is arranged between the fifth through hole and the sixth through hole. The invention can solve the problems of incomplete filling of the adhesive, more bubbles and the like in the process of testing the specific gravity cup, thereby greatly improving the accuracy of the test.

Description

A kind of high-viscosity adhesive density testing device and method

technical field

The invention belongs to the field of adhesive testing, and in particular relates to a high-viscosity adhesive density testing device and method, which is suitable for adhesives with high viscosity or even ultra-high viscosity that cannot flow by themselves under testing conditions.

Background technique

As a property of matter, density is only related to the type and state of matter, and has nothing to do with the mass and volume of matter.

Density is one of the basic properties of a substance, and it is also a very important characteristic. Especially in the production process, a basic and quick judgment on the properties of a substance can be made through density detection. For example, in the production process of adhesives, inorganic fillers are sometimes added. The difference between the actual feeding weight and the theoretical feeding weight of the fillers can be judged by measuring the density of the adhesive after adding the fillers, and the quality control in the process is carried out. At the same time, the density can also be adjusted. The degree to which the various components of a reactive adhesive formulation are mixed uniformly.

At present, the test methods for the density of adhesives mainly include the pycnometer method and the density bottle method, but these two test methods are mainly aimed at liquid, self-flowing adhesives, and are not suitable for high-viscosity, non-self-flowing adhesives.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-viscosity adhesive density test device and method, which can be applied to the density test of high-viscosity, non-self-flowing adhesives, and the density test result is accurate.

In order to achieve the above purpose, the technical solution of the present invention provides a high-viscosity adhesive density testing device and method, including a glue container assembly, a glue injection buffer assembly, a density test assembly, and a glue overflow removal assembly connected in sequence;

The glue container assembly includes a glue container, a glue outlet pipe, and a propeller; the pusher is arranged on the inner circumference of the glue container; the glue outlet tube is arranged at the bottom of the glue container;

The glue injection buffer assembly includes a buffer tank, a first conical channel, and a first platform; the inner wall of the buffer tank is connected with the outer wall of the rubber outlet pipe; the first conical channel is arranged at the bottom of the buffer tank, and The inner diameter is tapered from top to bottom; the first platform is arranged at the bottom of the first conical channel;

The density testing assembly includes a measuring tube, a second platform, and a third platform; the second platform is set on the top of the measuring tube and is connected to the first platform; the third platform is set on the measuring tube bottom;

The glue overflow removal assembly includes a fourth platform; the fourth platform is connected with the third platform; the upper and lower surfaces of the fourth platform are respectively provided with concentric fifth through holes and sixth through holes; The diameter of the through hole is larger than the diameter of the sixth through hole, and a second conical channel whose inner diameter is tapered from top to bottom is disposed between the two.

Preferably, the top of the propeller is provided with an exhaust hole and a glue push rod; the exhaust hole is connected with an exhaust hole sealing rod.

Preferably, the glue container is cylindrical, and a sealing ring is provided between the outer circumference of the propeller and the inner circumference of the glue container.

Preferably, the length of the rubber outlet pipe is equal to the height of the buffer tank.

Preferably, the bottom of the buffer tank is annular and is provided with a first through hole; the wall thickness of the rubber outlet pipe is smaller than the difference between the inner diameter of the buffer tank and the inner diameter of the first through hole.

Preferably, the measuring tube is integrally connected with the second platform and the third platform; the diameter of the measuring tube is greater than or equal to 3 mm, and the length is greater than or equal to 5 cm;

Preferably, the first platform is provided with a second through hole communicating with the first conical channel; the second platform is provided with a third through hole communicating with the test tube;

The diameters of the second through hole, the third through hole, the fourth through hole and the fifth through hole are all equal;

The first platform and the second platform, and the third platform and the fourth platform are all connected by four screws.

Preferably, the measuring tube is made of a transparent material that is not easily deformed; the inner wall of the measuring tube is smooth.

Preferably, the inner wall of the buffer tank is threadedly connected to the outer wall of the rubber outlet pipe.

Preferably, it includes the following steps:

Measure the mass of the density test component to be m1;

connecting the first platform and the second platform;

A standard adhesive with a known density of ρ0 is placed into the glue container;

Apply pressure through the glue push rod to extrude the standard adhesive from the rubber outlet pipe;

Connect the glue container and the buffer tank; push the glue push rod at a constant speed; scrape the standard adhesive on the lower surface of the third platform;

Connect the density test assembly and the glue overflow removal assembly; push the glue push rod at a constant speed;

Stop the glue; disconnect the connection between the first platform and the second platform, between the third platform and the fourth platform; scrape the third through hole and the fourth through hole hole excess of said standard adhesive;

Weighing the mass of the density test assembly loaded with the standard adhesive is m2;

Calculate the standard volume V0=(m2-m1)/ρ0 of the density test assembly;

The standard adhesive is replaced with the adhesive to be tested, and the mass of the density test assembly containing the adhesive to be tested is measured according to the above steps as m3; the mass of the adhesive to be tested is Δm=(m3-m1 );

Calculate the density ρ1=Δm/V0 of the adhesive to be tested.

To sum up, the present invention includes the following beneficial technical effects:

It solves the problem that during the density test of high-viscosity adhesives, when the adhesive is filled into the pycnometer or other container, it cannot ensure that the corners are completely filled with the adhesive, and the adhesive is easily transferred to the pycnometer or other container. Density test inaccurate problem.

The invention is suitable for testing the density of high-viscosity one-component or multi-component adhesives.

In the present invention, after the adhesive is mixed and defoamed, there will be no secondary transfer, thereby avoiding the generation of air bubbles during the secondary transfer.

In the testing process of the present invention, the adhesive will not be in contact with other solvents or media, so that the reaction between the adhesive and the medium will not affect the test accuracy.

The testing method of the invention is convenient and quick, and can be applied to testing the density of the adhesive with very short operating time.

Description of drawings

Fig. 1 is the structural representation of the high-viscosity adhesive density testing device of the present invention;

Fig. 2 is the structural representation of the glue container assembly in the present invention;

3 is a schematic structural diagram of the glue injection buffer assembly in the present invention;

Fig. 4 is the structural representation of the density test assembly of the present invention;

FIG. 5 is a schematic view of the structure of the glue overflow removing component of the present invention.

Reference number:

1. Glue container assembly; 11. Glue container; 12, glue outlet; 13, propeller; 131, exhaust hole; 132, exhaust hole sealing rod; 133, push glue rod;

2. Glue injection buffer assembly; 21, buffer tank; 211, first through hole; 22, first platform; 221, second through hole;

3. Density test assembly; 31, second platform; 311, third through hole; 32, measuring tube; 33, third platform; 331, fourth through hole;

4. Glue overflow removal component; 41, fourth platform; 411, fifth through hole; 412, sixth through hole.

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawings 1 to 5 .

The embodiment of the present invention discloses a high-viscosity adhesive density testing device, which includes a glue container assembly 1 , a glue injection buffer assembly 2 , a density testing assembly 3 , and a glue overflow removal assembly 4 , which are connected in sequence.

The glue container assembly 1 includes a cylindrical glue container 11; the glue container 11 is provided with a glue outlet pipe 12 downward at the center of the bottom, and the outer wall of the glue outlet tube 12 is provided with external threads; the glue container 11 is provided with a The disc-shaped pusher 13 is wrapped with a sealing ring along the circumferential direction, and the sealing ring makes the disc-shaped pusher 13 closely fit with the inner wall of the glue container 11, and there will be no adhesive overflow from the gap. ;

The top of the propeller 13 is provided with an exhaust hole 131. When the propeller 13 is installed on the glue container 11, the air in the glue container 11 can be exhausted through the exhaust hole 131; the exhaust hole 131 can be screwed with The air vent sealing rod 132 can be used to seal the glue container 11 after the air is exhausted; a glue pushing rod 133 is also connected vertically at the top center of the propeller 13 .

The glue injection buffer assembly 2 includes a cylindrical buffer tank 21, the inner diameter of the buffer tank 21 is equal to the outer diameter of the rubber outlet pipe 12 of the glue container assembly 1, and the inner wall of the cylindrical buffer tank 21 is provided with the rubber outlet pipe 12. The internal concave thread matched with the external thread can be quickly installed and dismantled;

The length of the glue outlet pipe 12 of the glue container assembly 1 is equal to the height of the cylindrical buffer tank 21 of the glue injection buffer assembly 2, so that even under the condition of high pressure glue injection, the glue container assembly 1 and the glue injection buffer assembly 2 can be guaranteed. The connection is firm and will not loosen.

The bottom of the buffer tank 21 is annular, and a circular first through hole 211 is opened in the center position. The diameter of the first through hole 211 is smaller than the bottom diameter of the cylindrical buffer tank 21; at the same time, the glue container assembly 1 The wall thickness d of the glue outlet pipe 12 is smaller than the difference D between the inner diameter of the buffer tank 21 and the inner diameter of the first through hole 211 (that is, the wall thickness d of the glue outlet of the glue container assembly 1 is smaller than the difference between the inner and outer diameters of the annular bottom of the buffer tank 21 ) D), in this way, it is possible to prevent the glue container 11 and the glue easily generating air bubbles at the inner wall of the glue outlet tube 12 from entering the measuring tube 32 to the greatest extent.

The glue injection buffer assembly 2 also includes a first platform 22 located directly below the buffer tank 21; a second through hole 221 is formed in the center of the first platform 22, and the first through hole 211 and the second through hole 221 are connected through a channel; The diameter of the first through hole 211 is larger than that of the second through hole 221, so that a conical channel with a tapered inner diameter is formed between the first through hole 211 and the second through hole 221; in this way, the flow through hole of the adhesive changes from large to small, and the pressure of the adhesive increases. From small to large, the adhesive entering the test tube is more compact, and this pressurization process can squeeze out the adhesive without removing clean air bubbles.

The density test assembly 3 includes two second platforms 31 and 33 that are distributed up and down and are disc-shaped. The upper and lower surfaces of the second platform 31 and the third platform 33 are flat and smooth; the second platform 31 and the third platform 33 33 can be seamlessly fitted after being fastened by screws, and there will be no adhesive overflowing from the gap after connection.

Four screws are evenly distributed around the circular periphery of the second platform 31, and the screws correspond to the four screw holes of the first platform 22 of the glue injection buffer assembly 2. The glue injection buffer assembly 2 and the density test assembly can be connected by screws. 3 connection; at the same time, these four screws also play a positioning role, so that the third through hole 311 in the center of the second platform 31 of the density test assembly 3 is connected to the second through hole 311 in the center of the first platform 22 of the glue injection buffer assembly 2. The through holes 221 are aligned, and the diameters of the second through holes 221 and the third through holes 311 are equal; the third through hole 311 is connected to a cylindrical measuring tube 32, the lower end of the measuring tube 32 is connected to the third platform 33, and the third platform 33 is directly connected to the third platform 33. There is also a circle with the same size as the diameter of the measuring tube 32 in the center, and the second platform 31 , the third platform 33 and the measuring tube 32 are integrated.

The diameter of the measuring tube 32 should be greater than or equal to 3mm, and the length of the measuring tube 32 should be greater than or equal to 5cm, so as to ensure that the amount of glue used in one test will not be too small, resulting in a large deviation, and at the same time, it will not waste a lot of samples due to the need to consume a lot of samples for one test. and environmental pollution; the inner wall of the measuring tube 32 should be smooth to reduce the friction force with the adhesive, avoid frictional heat generation, affect the adhesive test temperature, and thus affect the test results.

The glue overflow removal assembly 4 includes a cylindrical fourth platform 41, and the upper and lower surfaces of the fourth platform 41 are respectively provided with concentric fifth through holes 411 and sixth through holes 412; the diameter of the fifth through hole 411 is larger than that of the sixth through hole 412, so that a conical channel with a tapered inner diameter is formed between the fifth through hole 411 and the sixth through hole 412, so that the flow through hole of the adhesive changes from large to small, and the pressure of the adhesive changes from small to large, this pressurization process can squeeze No clean air bubbles were removed from the adhesive.

Similarly, there are 4 bolts evenly distributed on the fourth platform 41 in this area. These 4 bolts correspond to the positions of the 4 screw holes on the third platform 33 of the density test assembly 3. The density test assembly 3 can be connected to the overflow by screws. The glue exclusion component 4 is seamlessly connected; at the same time, these four screws also play a positioning role, so that the fifth through hole 411 in the center of the fourth platform 41 of the glue overflow exclusion component 4 is connected to the third platform 33 of the density test component 3 The fourth through holes 331 in the center are aligned, and the diameters of the fourth through holes 331 and the fifth through holes 411 are equal.

The main key points of the high-viscosity adhesive density testing device in the present invention are as follows:

1. The glue container 11 is cylindrical, and the material is not easily deformed. There is a glue outlet pipe 12 connected to the center of the bottom of the cylindrical container. The glue container 11 can be directly placed in a centrifuge to face the adhesive for mixing and defoaming treatment;

2. The measuring tube 32 is cylindrical, the material has a certain strength, and is not easily deformed under common test conditions, preferably glass, polymethyl methacrylate and other transparent materials, other metals and plastics are also acceptable if they meet the requirements;

3. The inner diameter of the measuring tube 32 should not be less than 3mm, and the length should not be less than 5cm;

4. The sealing ring of the glue container 11 is preferably made of silicone material, and other materials with lower hardness such as polyurethane can also be used;

5. The wall thickness of the hose 12 should be smaller than the difference between the outer diameter of the bottom of the buffer tank 21 and the inner diameter of the first through hole 211;

6. The diameter of the first through hole 211 is smaller than the outer diameter of the bottom surface of the buffer tank 21;

7. The diameter of the second through hole 221 is smaller than the diameter of the first through hole 211;

8. The diameter of the sixth through hole 412 is smaller than the diameter of the fifth through hole 411;

9. The diameters of the second through hole 221, the third through hole 311, the fourth through hole 331, and the fifth through hole 411 are all equal;

10. The size and shape of the first platform 22, the second platform 31 and the third platform 33 are identical;

11. The thickness of the fourth platform 41 is greater than that of the first platform 22, the second platform 31 and the third platform 33;

12. The first platform 22, the second platform 31, the third platform 33 and the fourth platform 41 are all circular, the circular surface is flat and smooth, and can be seamlessly connected by screws, and there will be no glue overflow after connection.

The using method of the high-viscosity adhesive density testing device in the present invention is as follows:

Step 1: Calibration

1. In the required test environment, first use a balance to weigh out the mass of the density test component 3 as m1, and then lock the first platform 22 and the second platform 31 with 4 bolts, so that the first platform 22 and the second platform 31 are locked by four bolts. The two discs of the platform 31 fit seamlessly;

2. Then mix and defoaming the high-viscosity standard adhesive with known density (density ρ0) according to the recommended ratio. In this process, the cylindrical glue container 11 is directly used for centrifugal mixing and defoaming, so as to avoid the secondary transfer of the adhesive to generate air bubbles ( If for one-component adhesives, no mixing is required);

3. After the mixing and defoaming are completed, apply a certain pressure through the glue push rod 133 of the glue container 11 to slowly extrude the adhesive from the rubber outlet pipe 12, and discard the adhesive that was not mixed evenly at the beginning;

4. After the color of the adhesive to be extruded is uniform, connect the adhesive container 11 and the cylindrical buffer tank 21 by threading, push the adhesive push rod 133 at a constant speed, and wait for the adhesive to flow out from the fourth through hole 331, and then make it out of the glue For a period of time, until the adhesive extruded from the fourth through hole 331 has a stable glue type, uniform color and no bubbles, stop the glue, and use a plastic scraper to scrape the adhesive along the lower surface of the third platform 33;

5. Then connect the density test component 3 and the glue overflow removal component 4 with screws, continue to push the glue push rod 133 at a constant speed, and discharge the glue for a period of time, and wait for the adhesive extruded from the sixth through hole 412 to have a stable glue type, a uniform color, and no Bubble, stop the glue;

6. Remove all the screws between the first platform 22 and the second platform 31, the third platform 33 and the fourth platform 41, and use a plastic scraper to cut the third through holes 311 and the fourth through holes 331 along the surface of the circular platform. The adhesive is scraped flat, and its mass m2 is weighed to obtain the standard volume of the test tube V0=(m2-m1)/ρ0.

Step 2: Test

The high-viscosity adhesive to be tested is tested according to the method in the first step, and the mass difference Δm is obtained, and the density ρ1=Δm/V0 of the high-viscosity adhesive can be calculated.

The principle of the present invention to test the density of the adhesive is to use the basic formula of density: ρ=m/v, that is, in a container with a certain volume V, completely fill the adhesive, weigh the mass m of the filled adhesive, and then use the formula to calculate, you can get The density of the adhesive being measured. Its principle is the same as the density of the pycnometer.

The above are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be included in the protection scope of the present invention. Inside.

Claims (10)

1. The utility model provides a high viscosity adhesive density testing arrangement which characterized in that: comprises a glue container assembly (1), a glue injection buffer assembly (2), a density testing assembly (3) and a glue overflow removing assembly (4) which are connected in sequence;

the glue container assembly (1) comprises a glue container (11), a glue outlet pipe (12) and a propeller (13); the propeller (13) is arranged on the inner periphery of the glue container (11); the rubber outlet pipe (12) is arranged at the bottom of the rubber container (11);

the glue injection buffer assembly (2) comprises a buffer tank (21), a first conical channel and a first platform (22); the inner wall of the buffer tank (21) is connected with the outer wall of the rubber outlet pipe (12); the first conical channel is arranged at the bottom of the buffer tank (21), and the inner diameter of the first conical channel is gradually reduced from top to bottom; the first platform (22) is arranged at the bottom of the first conical channel;

the density testing assembly (3) comprises a measuring tube (32), a second platform (31) and a third platform (33); the second platform (31) is arranged at the top of the measuring pipe (32) and is connected with the first platform (22); the third platform (33) is arranged at the bottom of the measuring pipe (32);

the flash removal assembly (4) comprises a fourth platform (41); the fourth platform (41) is connected with the third platform (33); the upper surface and the lower surface of the fourth platform (41) are respectively provided with a fifth through hole (411) and a sixth through hole (412) which are concentric; the diameter of the fifth through hole (411) is larger than that of the sixth through hole (412), and a second conical channel with the inner diameter gradually reduced from top to bottom is arranged between the fifth through hole and the sixth through hole.

2. A high viscosity adhesive density testing device according to claim 1, wherein: the top of the propeller (13) is provided with an exhaust hole (131) and a glue pushing rod (133); an exhaust hole sealing rod (132) is connected in the exhaust hole (131).

3. A high viscosity adhesive density testing device according to claim 2, wherein: the glue container (11) is cylindrical; and a sealing ring is arranged between the periphery of the propeller (13) and the inner periphery of the glue container (11).

4. A high viscosity adhesive density testing device according to claim 3, wherein: the length of the rubber outlet pipe (12) is equal to the height of the buffer tank (21).

5. A high viscosity adhesive density testing device according to claim 4, wherein: the bottom of the buffer tank (21) is annular and is provided with a first through hole (211); the wall thickness of the rubber outlet pipe (12) is smaller than the difference value between the inner diameter of the buffer tank (21) and the inner diameter of the first through hole (211).

6. A high viscosity adhesive density testing device according to claim 5, wherein: the measuring tube (32) being integrally connected to the second platform (31) and the third platform (33); the diameter of the measuring tube (32) is more than or equal to 3mm, and the length is more than or equal to 5 cm; .

7. A high viscosity adhesive density testing apparatus according to claim 6, wherein: the first platform (22) is provided with a second through hole (221) communicated with the first conical channel; the second platform (31) is provided with a third through hole (311) communicated with the test tube;

the diameters of the second through hole (221), the third through hole (311), the fourth through hole (331) and the fifth through hole (411) are all equal;

the first platform (22) is connected with the second platform (31), and the third platform (33) is connected with the fourth platform (41) through four screws.

8. The high viscosity adhesive density testing device of claim 7, wherein: the measuring tube (32) is made of a non-deformable transparent material; the measuring tube (32) has a smooth inner wall.

9. A high viscosity adhesive density testing apparatus according to claim 8, wherein: the inner wall of the buffer tank (21) is in threaded connection with the outer wall of the rubber outlet pipe (12).

10. A method of using the high viscosity adhesive density testing apparatus of claim 9, wherein: the method comprises the following steps:

measuring the mass of the density test component (3) as m 1;

-connecting the first platform (22) and the second platform (31);

placing a standard adhesive with known density rho 0 into the glue container (11);

applying pressure through the glue pushing rod (133) to extrude the standard adhesive out of the glue outlet pipe (12);

connecting the glue container (11) with the buffer tank (21); pushing the glue pushing rod (133) at a constant speed; -screeding the standard adhesive on the lower surface of the third platform (33);

-connecting the density testing assembly (3) and the flash removal assembly (4); the glue pushing rod (133) is pushed at a constant speed;

stopping glue discharging; -disconnecting the first platform (22) and the second platform (31), and the third platform (33) and the fourth platform (41); scraping off the redundant standard adhesive of the third through hole (311) and the fourth through hole (331);

weighing the density test assembly (3) loaded with the standard adhesive to a mass m 2;

calculating the standard volume V0 ═ (m2-m1)/ρ 0 of the density test component (3);

replacing the standard adhesive with an adhesive to be tested, and measuring according to the steps to obtain the mass m3 of the density test component (3) filled with the adhesive to be tested; obtaining the mass of the adhesive to be tested as delta m (m3-m 1);

and calculating the density rho 1 of the adhesive to be measured as delta m/V0.

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