On July 27, 2017, Jining City signed strategic cooperation agreements with 27 state-owned enterprises such as China Construction, China Construction and State Grid, and signed 46 cooperation projects. The above projects include 4 new energy projects, of which the bus charging station project in Jining City covers bus and taxi, which is worthy of public expectation.
Jining City Bus Charging Station Project is jointly constructed by State Grid Electric Vehicle Service Co., Ltd. and Jining Bus Company with a total investment of 110 million yuan. It is a charging facility for electric buses and electric taxis in the city to meet the charging needs of the above electric vehicles. At the same time, the company invested in the deployment of time-sharing electric vehicles to meet the needs of government vehicles and official vehicles, and to build a 2 MW photovoltaic carport power generation project.
The other three new energy projects are Jiaxiang County Environmental Energy Power Generation Project, Lishui County Huaneng Biomass Cogeneration Project, and Wenshang County 1 million megawatt photovoltaic power generation project. Among them, China Everbright International Co., Ltd. cooperates with Jiaxiang County Garden and Environmental Protection Bureau. Jiaxiang County Environmental Protection Energy Power Generation Project, which treats 1,500 tons of domestic garbage per day, and treats 1,000 tons of domestic garbage in the first phase of the project. The project is expected to cover an area of ​​100 mu.
This time, Jining City signed 46 strategic cooperation projects with central enterprises, with a total investment of 77.348 billion yuan, including 19 infrastructure projects, 7 high-end equipment manufacturing projects, 7 cultural tourism projects, 4 new material projects, and 4 new energy projects. Two health care projects, one high-end chemical industry, modern agriculture and modern logistics projects.
Yu Yongsheng, member of the Standing Committee of the Jining Municipal Committee and executive deputy mayor, said that the central enterprises are strong, well-managed, advanced in technology and sufficient in talents, and they are an important pillar of the national economy. Jining will strengthen its service awareness and implement “one case, one discussion†and “one enterprise and one policy†for the enterprises and contracted projects in the central government to help enterprises solve the difficulties and problems they encounter, and truly enable central enterprises to enter, stabilize and develop. Well, to help Jining new and old kinetic energy conversion. We will deepen the reform of “distribution suitsâ€, create a business environment with the least government approval, the highest efficiency, and the best service development, and create a golden signboard for Jining’s policy, service, and investment.
Die Casting
The Die Castings that are created in this process can vary greatly in size and weight, ranging from a couple ounces to 100 pounds. One common application of die cast parts are housings - thin-walled enclosures, often requiring many ribs and bosses on the interior. Metal housings for a variety of appliances and equipment are often die cast. Several automobile components are also manufactured using die casting, including pistons, cylinder heads, and engine blocks. Other common die cast parts include propellers, gears, bushings, pumps, and Valves.
Die casting is a manufacturing process that can produce geometrically complex metal parts through the use of reusable molds, called dies. The die casting process involves the use of a furnace, metal, die casting machine, and die. The metal, typically a non-ferrous alloy such as aluminum or zinc, is melted in the furnace and then injected into the dies in the die casting machine. There are two main types of die casting machines - hot chamber machines (used for alloys with low melting temperatures, such as zinc) and cold chamber machines (used for alloys with high melting temperatures, such as aluminum). The differences between these machines will be detailed in the sections on equipment and tooling. However, in both machines, after the molten metal is injected into the dies, it rapidly cools and solidifies into the final part, called the casting. The steps in this process are described in greater detail in the next section.
Die cast parts can vary greatly in size and therefore require these measures to cover a very large range. As a result, die casting machines are designed to each accommodate a small range of this larger spectrum of values. Sample specifications for several different hot chamber and cold chamber die casting machines are given below.
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Type
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Clamp force (ton)
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Max. shot volume (oz.)
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Clamp stroke (in.)
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Min. mold thickness (in.)
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Platen size (in.)
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Hot chamber
|
100
|
74
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11.8
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5.9
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25 x 24
|
|
Hot chamber
|
200
|
116
|
15.8
|
9.8
|
29 x 29
|
|
Hot chamber
|
400
|
254
|
21.7
|
11.8
|
38 x 38
|
|
Cold chamber
|
100
|
35
|
11.8
|
5.9
|
23 x 23
|
|
Cold chamber
|
400
|
166
|
21.7
|
11.8
|
38 x 38
|
|
Cold chamber
|
800
|
395
|
30
|
15.8
|
55 x 55
|
|
Cold chamber
|
1600
|
1058
|
39.4
|
19.7
|
74 x 79
|
|
Cold chamber
|
2000
|
1517
|
51.2
|
25.6
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83 x 83
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The selection of a material for die casting is based upon several factors including the density, melting point, strength, corrosion resistance, and cost. The material may also affect the part design. For example, the use of zinc, which is a highly ductile metal, can allow for thinner walls and a better surface finish than many other alloys. The material not only determines the properties of the final casting, but also impacts the machine and tooling. Materials with low melting temperatures, such as zinc alloys, can be die cast in a hot chamber machine. However, materials with a higher melting temperature, such as aluminum and copper alloys, require the use of cold chamber machine. The melting temperature also affects the tooling, as a higher temperature will have a greater adverse effect on the life of the dies.
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Materials
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Properties
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Aluminum alloys
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·Low density
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·Good corrosion resistance
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·High thermal and electrical conductivity
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·High dimensional stability
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·Relatively easy to cast
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·Requires use of a cold chamber machine
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|
Copper alloys
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·High strength and toughness
|
|
·High corrosion and wear resistance
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·High dimensional stability
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·Highest cost
|
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·Low die life due to high melting temperature
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·Requires use of a cold chamber machine
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Zinc alloys
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·High density
|
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·High ductility
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·Good impact strength
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·Excellent surface smoothness allowing for painting or plating
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·Requires such coating due to susceptibility to corrosion
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·Easiest to cast
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·Can form very thin walls
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·Long die life due to low melting point
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·Use of a hot chamber machine
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Advantages:
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·Can produce large parts
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·Can form complex shapes
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·High strength parts
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·Very good surface finish and accuracy
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·High production rate
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·Low labor cost
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·Scrap can be recycled
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Die Casting,Aluminum Die Casting,Die Casting Parts,Zinc Die Casting
Ningbo City Yinzhou Ruican Machinery Co.,Ltd , https://www.cnruican.com