How big is the Ethereum plate

1. After nearly two years of bear market in the currency circle, the currency price of Ethereum has now dropped to more than 900 yuan, and the current downward trend continues. Short Ethereum is now a better trading strategy. At present, digital currency exchanges that can be short, such as coin an, fire coin, bitnet.

2.

I think the first reason why Ethereum has been setting new records is that it has a lot of capital

the second reason is that many ordinary people have paid attention to virtual currency . These ordinary people have strong purchasing power, and they may have been speculators in stocks or funds before. When they find that the virtual currency is rising well, they will bring a lot of money into the market. The admission of these ordinary people will increase more capital admission, because in the view of capital, these ordinary people are a crop of leeks

the third reason is e to the soaring price of bitcoin, bitcoin is now rising very rapidly, from $20000 a bitcoin in 2020 to $60000 a bitcoin now. It's terrible. For a lot of capital, they can't speculate on bitcoin. Because bitcoin's plate is too big, they have to go back and speculate on Ethereum

first, a large amount of capital has entered the market

at present, the global economy is not very good, there are not many things that can be invested, and the global currencies are devaluing and inflating for a lot of capital, their money will depreciate one day if they hold it in their hands. They need to invest their money. At this time, they find that the virtual currency can keep the value and will not inflate. At this time, there will be a lot of capital, with a lot of money to buy Ethereum. When a lot of people go to buy Ethereum, it is normal for Ethereum prices to rise

3. Calculation of cavity size: (1) determination of radial dimension of cavity: according to the average value, the average shrinkage s of plastic parts is 0.6%, and the maximum wear of the mold is 1 / 6 of the tolerance of plastic parts; The manufacturing tolerance of the die is ￡ z = △ / 3, taking x = 0.75. LM1 5.98O+0.48 →6.26O-0.48 LM1o+￡z=〔1+sLs1-X△〕o+￡z =〔1+0.006 × 0.26-0.75 × 0.48〕0+0.18 =5.930+0.16 ②LM2 48O+0.48 →5.28O-0.48 LM2o+￡z=〔(1+S) × 5.28-0.75 × 0.48〕o+￡z =4.950+0.16 ③LM3 5.15O+0.48 →5.63O-0.48 LM3o+￡z=〔(1+S) × 5.63-0.75 × 0.48〕o+￡z =5.300+0.16 ④LM4 1O+0.48 →1.38O-0.38 LM4o+￡z=〔(1+S) × 1.38-0.75 × 0.38〕o+￡z =1.100+0.12 ⑤LM5 18.89O+0.88→19.77O-0.88 LM5o+￡z=〔(1+S) × 19.77-0.75 × 0.88〕o+￡z =19.230+0.29 ⑥LM6 0.96O+0.38→1.34O-0.38 LM6o+￡z=〔(1+S) × 1.34-0.75 × 0.38〕o+￡z =1.060+0.12 ⑦LM7 ∮2O+0.38 →∮2.38O-0.38 LM7o+￡z=〔(1+S) × 2.38-0.75 × 0.38〕o+￡z =2.100+0.12 ⑧LM8 ∮6.1O+0.58 →∮6.68O-0.38 LM7o+￡z=〔(1+S) × 6.68-0.75 × 0.38〕o+￡z =6.290+0.19 ⑨LM9 ∮0.77→1.05 LM9 =〔(1+S)*1.05-0.75*0.38〕 =0.86 o+0.13 ⑩LM10 10.5 →11.18 LM10 =〔(1+S)*11.18-0.75*0.68〕 =10.74 2、 Core height: ① h 4.7 → 5.18 Hm1 = [(1 + s) * 5.18-0.75 * 0.48] = [(1 + 0.006) * 4.7 + 0.5 * 0.48] = 4.97; ② h 8.9 → 9.48 hm2 = [(1 + s) * 9.48-0.75 * 0.58] = [(1 + 0.006) * 8.9 + 0.5 * 0.58] = 9.25 (3), and Radial dimension of the core: ① LM1 = 5.98 → 5.98 LM1 = [(1 + s) * ls + X △] = [(1 + 0.006) * 5.98 + 0.75 * 0.48] = 6.37 ② LM2 = 2.12 → 2.12 LM2 = [(1 + s) * ls + X △] = [(1 + 0.006) * 2.12 + 0.75 * 0.38] = 2.42 (4),] Design and calculation of side core pulling mechanism of inclined guide pillar: ① hm10.77 → 1.15 Hm1 = [(1 + s) hs1-x] = [(1 + 0.006) * 1.15-0.5 * 0.38] = 0.97 hm2 10.5 → 11.18 Hm1 = [(1 + s) hs2-x] = [(1 + 0.006) * 11.18-0.5 * 0.68] = 10.9 Force (FC) FC = CHP (COS - Sin) = [2 * 3.14 * (3.1 + 1) / 2 * 10] * 3.5 * 10 * 1 * 10 * (0.15 * cos30 - sin30) = 60.38n ③: inclined guide column inclination angle () inclined guide column inclination angle is one of the main technical data of side core pulling mechanism, which is directly related to whether the plastic parts can be taken out smoothly after molding, pushing force and pushing distance. For the sake of safety, Choose = 22 30 taper angle () = 25 and the corresponding mold opening distance h = s * cot = 5.43 * cot 22.5 = 2.414mm, demoulding force (FT) ft = FC = 63.08n, bending force (FW) FW = ft / cos = 63.08 ／ cos22.5 = 68.57n, mold opening force (FK) FK = ft * Tan = 63.08 * tan22.5 = 26.13n, ④: Calculation of working length of inclined guide pillar (L) l = s * (COS ／ sin) = 5.43 * cos22.5 ／ sin22.5 = 29.5mm, six mold related parameters calibration Core (1) determination and check of die closing height 1. Determination of die closing height. According to the dimensions of each template of standard mold base and other dimensions of mold design: fixed mold base plate H = 16mm 2. Fixed mold plate H = 18mm moving mold plate h. = 23mm support plate H = 15mm cushion block? H pad = 40mm moving die base plate h dynamic = 16mm die closing height: H closed = h fixed + H + h. + H branch + H Pad + h dynamic = 16 + 18 + 23 + 15 + 40 + 16 = 128mm the overall dimension of the die is 160mm × 100 mm, the maximum installation size of xs-zs-22 injection molding machine template is 250 × 350, so it can meet the mold installation requirements. As the minimum thickness of the mold allowed by xs-zs-22 injection machine is 60mm and the maximum thickness is 180mm, it meets the requirements of mold installation. Due to the small plastic parts and the small center distance, the opening stroke check of the die meets the requirements The maximum opening and closing stroke of the injection machine is 160mm. The structure of the plastic injection mold is complex. There are various parts in the mold. The position and function of each part in the mold are different, so the performance requirements of the material are different. So choosing high quality and reasonable material is the guarantee of procing high quality mould. The requirements of materials for plastic mold are: good machining performance; It has enough surface hardness and wear resistance; It has enough strength and toughness; It has good polishing property; Good heat treatment ability; Good heat treatment ability; It has good corrosion resistance and surface processability. Here we check the manual to get the following table: the use of mold parts requires heat treatment of mold materials, which indicates that the formed parts have high strength, good wear resistance and small heat treatment deformation. Sometimes, it also requires corrosion resistance of 5grmnmo, 5grnimo, 3grw8v quenching, medium temperature tempering ≥ 46hrc. It is used for mold T8 with high forming temperature and high forming pressure T8A T10 T10A T12 quenching and low temperature tempering ≥ 55HRC is used for mould with simple shape and small size, 38GrMoALA molation and nitriding ≥ 55HRC is used for movable forming parts with high wear resistance and can prevent hot bite, 45,50,55,40gr, 42GrMo molation and surface quenching ≥ 55HRC is used for thermoplastic forming mould with 10,15,20,12grni2 carburizing, 45,50,55,40gr, 42GrMo molation and surface quenching ≥ 55HRC is used for mass proction of procts Quenching ≥ 55HRC, easy cutting or plastic processing method is used to make small mold. Beryllium copper has excellent thermal conctivity, good wear resistance, castable zinc base alloy and aluminum alloy. It can be used in trial proction or small and medium batch proction of formed parts. Nolar cast iron normalizing or annealing normalizing ≥ 200hbs is used for large mold sprue bushing with good wear resistance, and sometimes requires corrosion resistance of 40,50 55 surface quenching ≥ 55HRC push rod, draw bar, etc. certain strength and wear resistance T8A t8t10 quenching, low temperature tempering ≥ 55HRC guide post, guide sleeve surface wear resistance, toughness, bending resistance, not easy to break 20, 20mn2b carburizing, quenching ≥ 55HRC T8A & # 92; T10A surface quenching ≥ 55HRC 45 molation, surface quenching, low temperature tempering ≥ 55HRC brass H62 & # 92; Bronze alloy is used for forming parts of guide sleeve with high strength, good wear resistance, small heat treatment deformation, 9mn2v quenching and low temperature tempering ≥ 55HRC. It is used for mould gr12mov quenching and medium temperature tempering ≥ 55HRC with high strength and wear resistance requirements in mass proction. It is the same as above, but with small heat treatment deformation and good polishing property. All kinds of templates, push plates, fixed plates and mould bases have certain strength and rigidity of 45, 50, 45, 50, 45 40gr molation ≥ 200 HBS structural steel Q235 ctile iron is used for large mold HT200 is only used for the processing requirements and process of the main parts of the eight injection mold of the mold base 8.1 processing requirements of the main parts of the injection mold 8.1.1 blank forging technical requirements in order to save raw materials and processing hours, improve proction efficiency, the blank of the mold adopts the free forging method, at the same time, Through forging, the material structure is fine and dense, and the distribution of carbide and streamline is reasonable, so as to improve the heat treatment performance and increase the service life of the die. In addition, in order to ensure the forging hardness, eliminate the forging stress and soften the forging for future machining, the blank should also be molated (quenching + high temperature tempering) after forging forming. 8.1.2 plane processing plane processing is the processing of the end face and side of each part in the mold. The machining process is divided into rough machining, semi finish machining and finish machining. Because this mold belongs to small mold, rough machining can be planed or milled, and left rear can be finished by fine milling or fine grinding. 8.1.3 cavity processing cavity processing methods can be divided into three types according to processing conditions and process methods: general machine tool processing cavity (turning, milling, planing, grinding, drilling). Special machine tools (profiling milling, CNC machine tools, machining centers, etc.). The surface quality of this plastic part is required to be high, but the cavity of the part is not very complex. The cavity can be machined by general machine tool and numerical control machine tool. Considering the above situation, this mold cavity can be NC milling as the main processing method, using Cimatron E for programming post-processing

4. In order to avoid too much plastic stored in the hopper for a long time, it is necessary to calculate the feeding amount of the hopper when the injection molding machine and mold are used for injection molding
mold (M ú j ù， In instrial proction, various molds and tools are used for injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods to obtain the required procts. In short, a mold is a tool used to shape an object. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the formed material. Known as the "mother of instry"
under the action of external force, the blank can be turned into a tool with specific shape and size. It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and engineering plastics, rubber, ceramics and other procts pressing or injection molding. The die has a specific contour or inner cavity shape, and the blank can be separated (punched) according to the contour shape by using the contour shape with cutting edge. The corresponding solid shape can be obtained by using the inner cavity shape. The die generally includes two parts: moving die and fixed die (or punch and die). The parts are taken out when they are separated, and the blank is injected into the mold cavity to form when they are closed. Mold is a precision tool with complex shape, which bears the expanding force of blank. It has high requirements for structural strength, stiffness, surface hardness, surface roughness and machining accuracy. The development level of mold proction is one of the important symbols of the level of mechanical manufacturing.

5. The volume of the same principle to calculate, and then add trimming allowance on the line. Look for a Book of die, it has a very detailed introction. If the drawing coefficient is selected well, the die will be much more smooth.

6. Bitcoin entered China in 2013, and its price soared from $13 to $93 in two months. Although on the surface, this is not a very high price, but in fact, the increase of six times has been very exaggerated
bitcoin is now worth $4000, which is not the same as it was then. But behind the odd price, the risk of bubble collapse has never disappeared. The recent regulation shows that the myth of ICO becoming rich overnight is broken
although 85% of the transaction volume of bitcoin is in the United States, 70% of the newly mined bitcoin comes from China, which is something that many people have never heard of.

7. No.18 Chaowai Street is Fenglian square. To the east of Fenglian square is the life insurance building. To the south of the road on the east side of the life insurance building, you can see the outward men.
another way: know the money cabinet of Fanli (if you really don't know it, ask anyone on the road). To the east of the money cabinet is the intersection, and the outward men is diagonally opposite to the money cabinet

8. I know that. Behind Fenglian square, take the subway to Chaoyang Gate. You can find China Life Insurance Building, Fenglian square or Fanli building. The outward man is opposite Fanli... It's easy to find. Don't worry!