http://conveyorbelt.blog.shinobi.jp/ Wed, 04 Nov 2020 02:01:29 GMT ja © Ninja Tools Inc.
Tungsten carbide alloy The metal carbides with high hardness and high melting point, such as tungsten carbide and titanium carbide, are pressed and sintered by powder metallurgy with a binder. Impregnated graphite can be divided into two types: resin impregnated and impregnated metal. Tungsten carbide is the most widely used end face seal material, and seal seamless belt is mostly used as a static ring for medium and low speed mechanical seals and a moving ring for high-speed mechanical seals.

The material of the auxiliary sealing ring. The advantages are high hardness and strength, wear resistance, high temperature resistance, corrosion resistance, low linear expansion coefficient, and the disadvantages are brittleness and difficult processing. It is used as a moving ring for medium and low speed mechanical seals and a static ring for high-speed mechanical seals.

The sealing performance and service life of the mechanical seal are related to the materials of each part, especially the material of the end face seal (friction pair), the material of the auxiliary seal and the material of the spring. Most applications are alumina ceramics and cermets. Graphite is the most widely used non-metallic material. Ceramics are mostly used in corrosive media, medium and low speed occasions. can reach 400~500℃), but the corrosion resistance is poor .

Surfacing hard alloy hard alloy surfacing welding hard alloy on the sealing surface of carbon steel, chromium steel and chromium nickel steel, the advantages are high hardness, good wear resistance, good temperature resistance (below 500 ℃), corrosion resistance or Good cavitation, the disadvantage is that it is easy to produce pores, slag inclusion and uneven surface hardness. The disadvantages are brittleness and high hardness that are difficult to process.]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/the%20materials%20of%20the%20end%20f Wed, 04 Nov 2020 02:01:29 GMT conveyorbelt.blog.shinobi.jp://entry/8
The above phenomenon often occurs during trial operation, and sometimes it can be eliminated by appropriately adjusting the static ring seat, but most of them need to be re-disassembled and replaced. If there is no significant change in the leakage, there is a problem with the static and dynamic ring seals; if there is a significant change in the leakage during cranking, it can be concluded that it is a dynamic,

There are problems with the static ring friction pair; if the leakage medium is sprayed along the axial direction, there are mostly problems with the moving ring seal. In addition, leakage channels can also exist at the same time, but there are generally primary and secondary differences. If the amount of leakage is small, there is usually a problem with the moving or static ring sealing ring; when the amount of leakage is large, it indicates that there is a problem between the moving and static ring friction pairs. Leaks occurred during trial operation.

If the leakage medium is sprayed around or leaks from the water cooling hole, the static ring seal is mostly ineffective. Leakage during installation static test After the mechanical seal is installed and debugged, a static test is generally required to observe the leakage., a large axial force is caused to separate the contact surfaces of the dynamic and static rings; Pair installation When the mechanical seal is too large, the end face of the friction pair will be severely worn and scratched;

On the basis of preliminary observation of the leakage and PTFE adhesive tape judgment of the leakage location, the manual cranking observation is performed. Therefore, the mechanical seal leakage during the trial operation is basically caused by the damage of the dynamic and static ring friction pairs after the failure of the shaft and the end cover seal is eliminated. 1. The main factors that cause the failure of the friction pair seal are: (l) During operation, due to abnormal phenomena such as evacuation, cavitation, pressure holding, etc. As long as you observe carefully and are familiar with the structure, you will be able to make a correct judgment. After the mechanical seal for the pump has undergone static testing, the centrifugal force generated by the high-speed rotation during operation will inhibit the leakage of the medium.]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/there%20are%20many%20types%20of%20me Thu, 22 Oct 2020 01:53:14 GMT conveyorbelt.blog.shinobi.jp://entry/7 PTFE coated fiberglass tape on the upper part without the effect of air flow, and rolls over in the upper container, showing 'boiling'.

Powder coatings began to be used in protection and electrical aspects. The porous partition divides the container into upper and lower parts. In addition to thermosetting epoxy, polyester, acrylic, there are still a large number of thermoplastic grease resistant powder coatings, such as polyethylene, polypropylene, polystyrene, fluorinated polyether, nylon, polycarbonate and various Fluorine resin, etc.. The preheating temperature of the workpiece can be slightly higher than the melting temperature of the powder. ;status.

The powder coating does not contain solvents and has no pollution from three wastes, which improves labor and hygiene conditions. It has been widely used up to now. Introduction to powder spraying and powder spraying equipment (1) Powder spraying process Powder spraying, also called powder coating, is a new type of coating process that has developed rapidly in recent decades. New technology such as powder electrostatic spraying, high efficiency, suitable for automatic assembly line coating, high powder utilization, and recyclable. Our country has started the experimental research of powder coating since the 1960s and has been applied in production.

The powder coating process has many outstanding advantages: Some countries started research experiments as early as the 1940s, but progress was slow. Surface coating. In 1954, James of Germany successfully coated polyethylene with the fluidized bed method. In 1962, the French company Symes company invented powder electrostatic spraying, and powder coating began to be officially adopted in production.Spraying generally includes: spraying (plastic) powder and painting (paint). With the development of technology, it has been widely used in the automotive industry, electrical insulation, corrosion-resistant chemical pumps, valves, cylinders, pipes, outdoor steel components, steel furniture, castings, etc.

The corrosion resistance of the coating is very good.  In recent years, due to the environmental protection of various countries The importance of protection, powder coatings that do not pollute water and atmosphere, have been developed rapidly. It is composed of a porous partition and a container. Powder coating process .]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/a%20thicker%20coating%20can%20be%20o Wed, 14 Oct 2020 06:06:06 GMT conveyorbelt.blog.shinobi.jp://entry/6
① The dimensional stability of PTFE is poor at high temperature and it is difficult to maintain its shape;

② The bonding force between the filler and the PTFE matrix is ​​small, which affects the highest bonding strength. The results of the study showed that the bonding strength of PTFE before and after treatment was increased from 7.

The advantages of this method are:

① Good weather resistance, humidity and heat resistance;

② Suitable for long-term outdoor use.The high temperature melting modification method is to sinter some fillers with strong surface activity, easy adhesion and small particle size (such as silica, aluminum powder, etc.

Based on the high-temperature melting method, Fu Zhaoxia and others added an inorganic additive LW to PTFE, which effectively improved the bonding performance of the PTFE sheet.

Guo Jinyan and others used silane coupling agent to improve the melting method.) to the surface of PTFE under high temperature conditions to change the structure of the PTFE surface And properties to achieve the purpose of improving bonding ptfe film adhesive tape strength.8 MPa to 9.

When LW is surface-treated with a silane coupling agent, the adhesion performance of the PTFE sheet is further improved, and its peel strength and shear strength reach the maximum when w(LW)=10%]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/the%20adhesion%20performance%20o Wed, 16 Sep 2020 02:52:37 GMT conveyorbelt.blog.shinobi.jp://entry/5
Explanation, one-layer system refers to a non-stick layer composed of a single coating; two-layer system refers to a non-stick layer composed of two coatings: bottom layer and top layer; three-layer system refers to three coatings consisting of bottom layer, middle layer and top layer Constructed non-stick layer.html Teflon coating, Teflon coating,.kytfl.

Make 304PTFE fiberglass adhesive tape stainless steel workbench. Teflon etc. Spraying Teflon. Stainless steel shelves. A spokesperson for the General Administration of Quality Supervision, Inspection # and Quarantine once stated that the quality and safety of non-stick pan products produced by Chinese companies that meet the national mandatory standards are guaranteed. Welcome to patronize! Teflon spray non-stick pan has been widely used in western developed countries.

The company adheres to the business philosophy of 'customer first, forge ahead' and the principle of 'customer first' to provide our customers with quality services. According to the different application functions, Teflon spray non-stick pan products can be divided into boiling pans, frying pans, frying pans, and milk pans; according to the internal and external non-stick coating system, non-stick pans can be divided into a layer system , Two-tier system and three-tier system pot.  Chinese non-stick pans have been popular since the 1990s, and an increasing number of consumers have begun to recognize their functions. Small carts.]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/consumers%20can%20use%20teflon%20s Tue, 08 Sep 2020 02:28:15 GMT conveyorbelt.blog.shinobi.jp://entry/4
Elimination method: A, tighten the connecting bolt B, and replace the valve body. The valve cannot be opened and closed automatically when it is pneumatic: Reason: A, the air source pressure is too low B, the spring preload is too large C, the rubber diaphragm is damaged. Elimination method: A, increase the air supply pressure PTFE BBQ Mat B, reduce the spring preload C, and replace the diaphragm.

When manually operating the valve, do not use auxiliary levers to prevent excessive torque from damaging the drive components or sealing parts. 2. Elimination method: A, replace the valve stem B, trim the thread and add lubricating oil. Do not paint grease or oil on the surface of the rubber lining laminated rubber diaphragm to prevent the rubber from swelling and affecting the service life of the valve.

Do not tie clues to the handwheel or valve stem to lift the valve during installation.. Handwheel operation is not flexible: Reason: A. Stem distortion Thread damage. Valves should be stored in a dry and ventilated room, stacking is strictly prohibited, both ends of the inventory valve must be sealed, and the opening and closing parts should be slightly open.

Installation, maintenance and troubleshooting of fluorine-lined diaphragm valve: Installation and maintenance: 1. Leakage at the connection between the valve body and the bonnet: Reason: A, the connecting bolt is loose B, and the rubber lining of the valve body is broken. ]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/check%20whether%20the%20operatin Thu, 03 Sep 2020 07:35:39 GMT conveyorbelt.blog.shinobi.jp://entry/3
After drying at 360℃ (1) PTFE has a very high viscosity in the molten state, and will not change from a highly elastic state to a viscous fluid state when heated to 415°C; the melt viscosity decreases with the increase of shear stress, showing the characteristics of a non-Newtonian fluid. Fast cooling rate, low crystallinity, slow cooling rate, high crystallinity. Therefore, to obtain good PTFE products, the sintering process must be strictly controlled. The entire operation process is as follows: first select the mold, install the mold, and carefully correct the center position of the mold installation.

Do not push and push in an environment where the room temperature is lower than 20℃. According to the requirements of the product, choose the material cavity and mold and install it, and strive to make the three plates parallel to the mandrel fixing plate, piston fixing plate and material cavity fixing plate, while the mandrel is perpendicular to the three plates, so as to ensure the uniformity of pipe wall thickness., the proportion of resin weight is 1/5) to make a paste.Teflon push molding production process Push molding is the most important part of the whole process. At C, the crystallization area disappears completely; when the temperature is lower than this temperature, it recrystallizes.

In order to obtain good products, it is necessary to achieve uniform fiberization, and the pushing temperature factors must be controlled, namely, the temperature of the material cavity is 30～35℃, and the temperature of the die is 50～60℃. The main factors that directly affect the crystallinity of the product are the sintering temperature and time during molding. I～20M/min, the compression ratio is 500～1000, and the die angle is 20～60.

Press it into a thick-walled cylindrical blank, put it into the barrel of the press, heat it, and press it with a plunger to form it. After trimming the blank, add it to the barrel of the pusher, lower the plunger, and start the push molding according to the established process conditions. These conditions are all necessary conditions to ensure product quality. , The aspect ratio of the die is 8-10, and the inner surface of the die must be smooth and clean.

When the temperature exceeds 327. The push tube and other products are subjected to the next connection process, namely drying, sintering zone length, and product specifications. Usually the pushing speed is 0. The 20-30 mesh sieved dispersing resin is mixed with organic additives (toluene, petroleum Gas Stove Top Protectors ether, solvent oil, etc. Pressing is also called paste extrusion molding. When designing process conditions, we must make overall considerations.]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/the%20sintering%20process%20must Thu, 27 Aug 2020 02:18:20 GMT conveyorbelt.blog.shinobi.jp://entry/2
The thickness of the coating depends on the coating system used. Dry 4. The thickness of the coating may vary from a few microns to 200 microns? 0.com/a/hezuoanli/20180315/260.Teflon spraying process, how to spray 1.2 mm? Drying The wet coating is heated in an oven, and the temperature is controlled below 100°C until most of the solvent has evaporated.html Teflon coating, Teflon coating,. Sintering The step of sintering is to heat the workpiece to a higher temperature until an irreversible reaction occurs.

The processing steps of dispersion coating are divided into the following steps: 1. Dispersion coating The processing method of dispersion coating is to make the coating material uniformly distributed in the solvent to form a dispersion liquid, a kind of wet processing in which solid substances are mixed in the liquid. Wet dispersion coating spraying The spray coating material must be uniform.kytfl. Powder coating The method of powder coating processing is dry processing? The coating material used here is in the form of extremely fine solid particles. We use organic solvents to dissolve the grease and heat it to about 400°C to completely volatilize.

The coating material melts with the bonding agent to form a network structure. Sintering Preparation of the workpiece In order to obtain sufficient surface adhesion on the surface of the workpiece, ptfe film adhesive tape all the grease on the surface to be coated must be removed first. The bonding ability of the coating with the surface layer of the workpiece can be improved by applying bonding additives and primers. Link to this article: http://www. Wet dispersion coating spraying 3. 2. This mixture is atomized by high-pressure air and sprayed on the surface of the workpiece]]> ptfexl.com http://conveyorbelt.blog.shinobi.jp/ptfexl.com/make%20the%20micro-powder-like Tue, 18 Aug 2020 03:31:16 GMT conveyorbelt.blog.shinobi.jp://entry/1