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Optimum Design of Plastic Injection Mould Gate Based on MoldFlow Xifen LIU a, Yihua HU b,Weijian HUANG c Department of Mechanical Engineering,Guangxi University of Technology, Liuzhou,Guangxi,China,545006 aliuxifen2000@163.com, bhuyh2003@163.com, cgxgxyjxx@163.com Keywords: Injection Mould,Moldflow, Gate,Optimum Design Abstract.
The factors of mould structure, dimension of piece, filling capacity and mould strength and so on must be considered when gate quantity was determined.
Although this plastic piece was simple shape, low-mass and used for structure piece, the high mechanical properties where was in corner was required.
From the range of gate location analyzed as shown in Figure 3 and Figure 4, if two gates was set in this range, weld-line would appear on the corner, which affected connective strength.

Affects the overall result (e.g. damage to the cutting tool, roughness of the machined surface, failures, defects and changes to the mechanical properties of the work piece) of the machined surface on the component, 2.
For the experiments was applied technological system machine-tool-workpiece-fixture, shown in figure 2: CNC Chiron FZ12, helical drill with a diameter d=8.0 mm, high precision hydraulic clamping head, the workpiece fixture: mechanical vise.
The mechanism of wear means the synergistic effect of factors that create a change in matter, a change in volume, i.e., a change in cutting edge dimension [5].

Researchers are concerned about thermal comfort in outside conditions, as it is one of the most important factors for those who work in these conditions.
To obtain a binary eutectic, organic and inorganic PCMs are mixed in various combinations for acquiring optimum properties [9].
GO has comparable properties to graphene, and it can be synthesized easily.
Fig. 3 FTIR spectrum of GO The XRD analysis was employed to examine the crystalline properties of the as-synthesized GO.
Thermo-physical properties of paraffin-based composite phase change materials filled with carbon nanotubes.

Introduction Titanium has been widely used to fabricate dental implant due to superior biocompatibility, corrosion resistance, and mechanical strength.
The most important success factor of dental implants involves osseointegration at interface between titanium implants and jaw bone.
Alkali-based treatment is known to induce the formation of calcium phosphate in simulated body fluid and improve the bone-bonding ability due to micro-sized porosity and chemical properties of the surface [5, 6].
A particularly interesting strategy to improve bone volume surrounding implants involves the deposition of organic biomolecule coatings including extracellular matrix proteins, bone growth factors, and drugs.
The XRD pattern of titanium disks coated with gelatin was not affected by the application of a gelatin coating.

Fault Analysis of Journal Bearing Considering the Turbulent and Thermo-Hydrodynamic Effects Guohui Xu1,a, Jian Zhou2,b, Haipeng Geng1,c, Mingjian Lu1,d 1 State Key Laboratory for Strength and Vibration of Mechanical Structures (Xi’an Jiaotong University), Xi’an710049, Shanxi Province, China 2 Institute of Mechatronics and Information Systems, School of Mechanical Engineering, Xi’an Jiaotong University，Xi’an 710049, China a xuguohui1983@126.com, bpearl_516@126.com, cpear_516@163.com,d544089501@qq.com Keywords: journal bearing, turbulence, thermo-hydrodynamic effect, wear.
It is not only damage the bearing geometry, also affect the pressure distribution of the oil film, reducing the service life of the bearings [1].
Iwasawa and co-authors [3] studied experimentally the effects of surface conditions and mechanical properties of shaft and bearing on the wear amount of BE bearing.
Fig. 3 Calculate the flow chart Results and analysis The table 1 is the main parameters of the bearing and lubricating oil: Table 1: Bearing and lubricant parameters Items Value Shaft radius ,r/ mm 274.5 Bush inner radius ,R/ mm 275 Bush outer radius,Rb2 /mm 570 Supply temperature, Tin/°C 43 Ambient temperature,Tb2/°C 35 Viscosity,μin/ Pa.s 0.022 Bush thermal conductivity ,kb/W/mK 54 Oil thermal conductivity,kf/ W/m.K 0.13 Oil density,ρ/ kg/ 850 Oil heat capacity,c /J/kg.K 2100 Bearing capacity, W/ kN 285 The turbulent factor take constant value 12 according to the laminar flow theoretical calculation.
When in turbulent theory calculation, turbulent factor is changes with Reynolds number.

Thus, the aim of the work was to study the influence degree of individual mineral additives and their complex on increasing the strength of hardened cement paste and identifying factors affecting this process.
In order to analyze the effect of mineral additives on the mechanical strength of hardened cement paste, their elastic properties must be taken into account.
Jafarov, The effect of finely ground mineral additives on the concrete properties, Building materials. 3 (2019) 73–76
Sausages, Properties of cements with carbonate additives, Cement. 10 (1981) 10-12
Arinina, Influence of water retaining additives on some properties of self-compacting concrete.

Introduction Because of coal anisotropy of physical and mechanical properties, as well as the presence of cleat and fissures, the integrity of coal is undermined, and coal is easily broken.
This classification standard is not applicable for coal seam with depth of a few hundreds meters, thereby the distribution of coal fracture prediction results is affected.
Because coal classification method and standard are yet been established for the current domestic to guide coal seam fracture zones forecast, internal factors and external factors of coal fracture is not comprehensive enough, and the safety requirements can not be met for coal seam drilling.
Hoek-Brown criterion can be expressed as follow [8-9]: (2) Where, are the maximum and minimum principal stress; is the uniaxial compressive strength for intact rock; is rock constant;, are the coefficient of rock properties.
[2] ZANG Xiu-ping, RUAN Han-ting and LI Ping, “Status quo and trends analysis of factors considered in rock mass classification methods,” Rock and Soil Mechanics, vol. 28, pp. 2245-2248, October 2007

Soil seepage, which is the hydraulic conductivity of the soil and the pressure gradient, can be affected by a combination of factors that affect water seepage in both homogenous and non-homogeneous earth dams.
Artificial Neural Networks ANN is one of the artificial intelligence related technologies which have many properties such investigating seepage in the dam’s body.
It is easily seen that seepage increase is regularly related to the dam height (H) if all the other affecting parameters are constant.
It can be seen that Rk is the more affecting geometrical variable on leakage flow with 66.9 % while the tanθ ranked in the second position with 12.6%.
The results interpretation confirmed that Rk is the most important factor affecting the leakage flow, with a significant percentage of 66.9% compared to a low percentage of 12.6% of the upstream slope.

The central parts of the disks were further reduced to about 10μm by mechanical dimpling, followed by final polishing.
It showed that the influence of CaO only affect the reducing sintered samples within a certain range.
This is the reason why SiO2 containing sample hold oustanding anti-reducing property.
So, the outstanding anti-reducing peoperty of sample containing SiO2 can be thought from two factors: 1)protection layer of liquid phase covering on the grain surface and, 2) formation of BaTiO3-x with compact hexagonal structure.
This is the key reason why reducing atmosphere sintered sample hold the best anti-reducing property.

In such an arrangement, the crucial factor determining the weight of the pressurization system is the volume of the liquid helium tank.
To optimize the total mass of the pressurization system, we consider the three factors with respect to the change of the volume of the tank, and find the optimal tank size.
The heater design is an important factor to the overall design of the pressurization system, because the heater material and design influence the heater efficiency 3, which directly affects the choice of battery.
Analysis for Heater Design The efficiency of a heater affects the required mass of battery.
The properties of the materials significantly change due to even slight variation of the temperature near critical state.