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The history of the rotary viscometer

The history of the rotary viscometer

The rotational viscosity measurement method pioneered by the Brookfield family in the United States uses its unique relationship between the shear and resistance generated by the rotor and the fluid to obtain a brand-new viscosity value, creating a precedent for the measurement of dynamic viscosity. The Brookfield family designed a dynamic viscosity measuring instrument in the world under the name of its own family, that is, a rotational viscosity measuring instrument, which is today's Brookfield viscometer. And Brinell is also a shorthand for the Brookfield family.

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Dyne pen test principle

Dyne pen test principle

Dyne pen test principle Using the surface tension test pen, it is easy to analyze the surface ability, hydrophilicity, wettability and other small changes of different solids. The analysis method is simple and effective, and the accurate result can be quickly known by only scratching a mark on the surface of the substrate. This is specially designed for production line testing and is carried out by trained operators in the factory. During the test, an intermediate value should be selected as the starting point, such as 38mN/m. During the test, if the test pen wets the surface of the substrate within 2 seconds, the surface tension of the substrate is greater than the selected value or just right, then you need to select A test pen with a larger value is used for the second test, and so on, until the test result is reduced to a water droplet (spherical) within 2 seconds, the previous value of this test is regarded as the surface energy of the substrate. And use this for comparative analysis.

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Common faults of punching machine

Common faults of punching machine

Common malfunctions 1. The punch can't come up after hitting it: 1. Adjust the air pressure to 4-5KG\GM 2. Adjust the punch of the punching machine to a suitable position, so that the punch of the punching machine is lowered. 2. There are burrs or can't be knocked out: 1. Grind the lower mold for about five or six minutes with a gold steel set, and then use a whetstone for two to three minutes. 3. The plastic bag will be broken when punching: 1. Check whether the air pressure is low 2. Check whether the punching signal system is normal 3. Check whether the punching machine and the cutter are synchronized 4. Whether the residence time of the punching machine is too long, intermittently unable to punch the hole or sometimes it is good and bad: 1. Check whether the air pressure is low 2. Is the air volume insufficient? 3. Check whether the solenoid valve has water or the muffler is blocked 4. Check whether the cylinder is leaking

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The working principle of pneumatic pump

The working principle of pneumatic pump

Pneumatic diaphragm pump is a positive displacement pump whose volume changes caused by the reciprocating deformation of the diaphragm. Its working principle is similar to that of a plunger pump. Due to the characteristics of the working principle of the diaphragm pump, the diaphragm pump has the following characteristics: (1) The pump will not overheat: Compressed air is used as power, and it is a process of expansion and heat absorption when exhausting. The temperature of the pneumatic pump is reduced when it is working, and no harmful gas is discharged.

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Features of high temperature cloth

Features of high temperature cloth

Features The high temperature cloth is used between low temperature -196℃ and high temperature 300℃, which has weather resistance and anti-aging. After practical application, if placed for 200 days under high temperature of 250℃, not only the strength will not decrease, but also the weight will not decrease; placed at 350℃ high temperature for 120 hours, the weight will only decrease about 0.6%; at -180℃ There will be no cracks in the ultra-low temperature, and the original softness will be maintained. 　With non-adhesiveness: it is not easy to adhere to any substance. It is easy to clean all kinds of oil stains, stains or other attachments attached to its surface; almost all adhesive substances such as paste, resin, paint, etc. can be easily removed; chemical corrosion resistance, strong acid, strong alkali, aqua regia and various organic solvents Corrosion. The friction coefficient is low (0.05-0.1), and it is the best choice for oil-free self-lubrication. The light transmittance is 6 to 13%. It has high insulation performance (small dielectric constant: 2.6, tangent below 0.0025), anti-ultraviolet, anti-static. Good dimensional stability (elongation coefficient less than 5‰) and high strength. Has good mechanical properties. Drug resistance and non-toxicity. It can withstand almost all pharmaceutical items.

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Features of ADM squeegee

Features of ADM squeegee

The ADM squeegee is specially made of German high-quality steel and Swiss high-precision technology to meet the various needs of customers. It is constantly updated to effectively prevent problems such as color tone, wire drawing, bleeding, streaks, and chrome layer wear. It is suitable for Medium and high-speed printing machines at home and abroad.

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Ruian Guangfa Printing Equipment Co., Ltd.

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