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What is lost wax casting? Lost wax casting builds a mold around a sacrificial wax model. After the mold investment is set, the wax is melted out and forms a cavity where the metal or glass flows in. Using this method of casting captures fine details in both metal and glass. This ancient method has been used since 3000 B.C. to visually capture the stories of ancient cultures and religions throughout history. What is the lost wax process used for? Lost wax casting is a 6,000-year-old process...
The high-end hydraulic parts of China's construction machinery are dependent on imports for a long period of time, resulting in large profits of construction machinery being swallowed by imported parts. What is more serious is that these imported hydraulic components mainly rely on one or two foreign companies. This not only affects people, but also affects the independent innovation of the construction machinery industry and even the industrial safety of the construction machinery. It also...
In choosing the valve body material, should be based on different uses and different pressure levels, to determine the valve body material suitable for working conditions.
Are cast aluminum alloys and aluminum alloys the same? Strictly speaking it is not the same. Aluminum alloys include cast aluminum alloys and deformed aluminum alloys. Therefore, cast aluminum alloy is a kind of aluminum alloy. Cast aluminum alloy has good casting properties, and can be made into parts with complex shapes; it does not require huge additional equipment; it has the advantages of saving metal, saving costs, and reducing man-hours, and has been well used in the aviation industry...
China (Shanghai) International Foundry Exhibition, China (Shanghai) International Casting Products Exhibition” was founded in 2005 and has been successfully held for 16 sessions. The exhibition covers castings, casting molds, casting materials, casting equipment and casting accessories. ◆ Casting 1. Cast steel, cast iron, stainless steel castings, non-ferrous alloy castings, aluminum castings, copper castings, ductile castings, wear-resistant castings; (precision casting, sand casting,...
In the casting process, there will be more or less white mouth and gray mouth. How to solve it effectively? First of all, understanding the working principle of casting can effectively avoid unnecessary waste. White mouth: All the iron in cast iron exists in the form of infiltrated carbon body. Because the fracture is bright white, it is called white cast iron. Due to the large amount of hard and brittle fe3c, white cast iron has high hardness and brittleness and is difficult to process....
For those who like to collect Hainan rosewood, they must be troubled by the old materials and new materials of Hainan rosewood. The old materials and new materials of sea yellow have always been a more controversial concept. Industry standards, many times the new and old standards are different. Then, what is the characteristics of Hainan Huanghua Pear? Hainan huanghuali old material and new material difference? We together look The first criteria for the classification: whether the wood...
Slide switch accessories material. Slide switch raw material parts. Slide switch copper material selection. Slide switch raw material selection. Basic concept of slide switch. Slide switch know. Toggle switch overview - Kosta sliding switch factory BODONGKAIGUAN; NET "KSDKG" It has strong toughness, especially applied to the part of the toggle switch socket, which is not easy to be deformed. Even if the toggle switch is used for a long time, it can maintain a proper clamping force,...
Abstract On March 1st, the new material in the Changsha High-tech Zone is packing its own products. The newly built factory is still under renovation. The same product of a coiled cable tray is continuously shipped out of the temporary packaging workshop and sent to all parts of the country. The size of the hair is wrapped around the cable tray... On March 1st, the new material in the Changsha High-tech Zone is packing its own products. The newly built factory is still under renovation. The...
Now home decoration will use a lot of materials, many owners will choose to buy in advance, in fact, this is wrong, there are many materials in the process of decoration to see the specific model of the material, must communicate with the designer in advance Make good material standards to avoid causing the later materials to be inconsistent with the decoration style. Let's take a look at the selection of materials and the types of decoration materials. Material standard selection technique...
Renovating a house is a very big thing. It has a lot of materials that we need to know. The types of materials used to decorate a house are various, so we will master this knowledge in advance. Some materials are purchased differently. The material procurement and raw materials are not the same. The following is a small series of decoration home network to introduce to you, what are the differences between material procurement and raw materials , and what are the methods of its purchase? First,...
Hetian jade is a kind of nephrite, commonly known as true jade. The traditional concept refers specifically to the jade produced in the Hetian region of Xinjiang. Hetian jade is a high-end jadeite with a leading brand in China. The new national standard refers to the name of jade with a hardness between 6.0 and 6.5. . How do Xinjiang Hetian jade, Russian materials, Qinghai materials, and Korean materials differ? Hetian jade itself is not a geographical concept, not specifically the jade...
From March 26 to 29, 2014, the 22nd China International Fashion Fair will be held in Beijing China International Exhibition Center. Material Girl, the fashion brand, is about to debut. What is the brand of women's clothing that is full of dreams and confidence? Like a surprise, let us look forward to W3B10 booth to bring us the surprise! Material Girl (MG) Fashion Madonna is the goddess of fashion for her lover Laura Rolla fashion brand. 2010 Madonna with the world's second-largest...
Lift underwear , we will first think of bras and underwear, in fact, vests, T-shirts, T-shirts, shirts, shirts, cotton sweaters and other pants and skin contact with clothing can be called underwear. Underwear and health are closely related to different materials have different characteristics of underwear, underwear is best to choose natural fiber products. One of the more appropriate cotton products, it's hygroscopicity and good warmth, the price is moderate. Specifically, underwear...
Ge Lan Tina health underwear experts to give you the bra under the "content" Sponge cup: Mold cup bra sponge after molding, the traditional sponge contains chemical composition that affects human health, and easy to yellow, airtight, coupled with the steel ring may oppression of breast tissue, impede blood circulation, resulting in long-term use Chest deformation or even cancer. In addition, sponge bra washing process of sewage, dust and bacteria can not be completely drained net,...
Tianjin Jinmei Carbon Material Company, a research and development project of "lithium battery carbon anode material and its preparation method", which is listed as a major project of Tianjin Science and Technology Giant leading enterprise, has successfully developed and obtained national patent recently and won the patent of Tianjin Patent prize. Tianjin Jin Mei US carbon material to the market of artificial graphite lithium-ion battery anode material, divided into capacity and rate...
In choosing the valve body material, should be based on different uses and different pressure levels, to determine the valve body material suitable for working conditions. First, the valve by valve body material classification 1, metal valves: the valve body and other parts made of metal materials. Such as cast iron valves, carbon steel valves, alloy steel valves, copper alloy valves, aluminum valves, lead alloy valves, titanium valves, Monel valves. 2, non-metallic materials Valve: the body...
Modern industrial production process, the degree of automation is getting higher and higher, while the control valve as an automatic control system in the executive body, in the stable production, optimal control and so has an important role. With the long period of equipment, high load operation, the control valve jamming, corrosion, vibration, leakage and other issues continue to occur, resulting in shortened service life of the valve, reduce the reliability of the work, seriously affecting...
Steam traps selection principle ① If the pipeline equipment is required to have the fastest heating rate, heating temperature control strictly, and keep the heating equipment can not be stored in the condensate, you should choose a row of saturated water mechanical trap; ② If the heating equipment has a larger heating area, does not require heating as soon as possible, lax heating temperature requirements, and can require the accumulation of a certain amount of condensate, the choice of thermal...
In order to test the quality of construction products, to prevent run, run, drip, leakage caused by a variety of accidents, before construction, we will pressure test the valve, especially the high-pressure valve, have higher requirements. In this case, then the valve pressure test when there are any standard principles? Here is a small collection of some of the principles of pressure test valve standard, as follows: (1) Under normal circumstances, the valve does not make strength test, but the...
Four-way valve flow caused by the lack of possible causes: Air conditioner system leaks, resulting in the system refrigerant circulation is not enough. 2. When the weather is cold, the evaporator evaporation basin is not enough. 3. Four-way valve and the system to match the poor, that the selected four-way valve in the middle of large flow capacity and system capacity. 4. General system design for a certain period of time after the compressor down to four-way valve before commuting, when high...
01 Use a sharp blade to reduce the cutting force of a CNC milling machine. Clip blades are divided into coated and uncoated blades. Uncoated blades are usually sharper than coated blades because the blade must be passivated (ER) if it is to be coated. Because the sharp edge will affect the coating in the edge of the bond strength. 02 With a constant cut depth, the use of a small nose radius can undoubtedly reduce cutting forces, especially radial cutting forces, which are the main cause of...
When the purchase of visual valves, the surface should be no blisters; plating surface should be uniform, should pay attention to whether there is peeling, cracking, scorching, exposed, flaking, dark spots and obvious pitting and other defects; spray surface tissue should be fine, smooth Uniform, no sagging, exposed defects. First, understand the valve knowledge: Civil valves commonly used in ordinary households commonly used gate valve, ball valve, triangular valve and other forms, usually...
Any choice of valve is the need to pay attention to detail, with the gradual expansion of the scope of application of the control valve, this type of valve can play the role of performance and has gradually been known. Then the type of valve in the choice of what can not be ignored details? On the selection of electronic control valve first thing to consider is how wear resistance. If the media contains more abrasive or abrasive particles, then it will make it worn, in which case you need to...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.