Advanced Materials Research Vols. 230-232

Abstract: Green resins based from sustainable resources are a requirement nowadays to replace non environmental coatings. Low (VOC) content epoxy which competes with conventional well established coating and high price could be derived from oil. UV curable resin is typically low VOC systems and offer advantages of rapid ambient cross linking and more energy efficient. Epoxy resins must have fast curing and low shrinkage upon cure which will give advantages to devices performance but epoxy resins are expensive and hence renewable resources from vegetable or non food oil can be used as raw materials.

Abstract: Boundary separation Approaching Rapid Casting is present. In this method, the 3-D CAD model of casting mould is sliced with certain thickness, and the 2-D profile of every slice is converted into the NC code automatically by computer. For case study, taking coated sand as material, casting moulds of propeller was made rapidly by self-developed laser rapid prototyping system. The casting test showed that this method can produce good quality parts. Boundary separation Approaching Rapid Casting with the characteristics of high production efficiency can cast products with complex cured surfaces in multi-variety and small batch, and it is a great significance in reducing the cost and shortening the cycle of new products development.

Abstract: Mechanical and vulcanization behaviors of styrene-butadiene rubber(SBR)/N330 and SBR/N330/PBMCN nanocomposites were investigated via partial replacement of SBR with pyrophyllite based modified composite nanopowder(PBMCN), which were prepared by melt mixing procedure. Results show a fairly good dispersion of PBMCN in the SBR/N330/PBMCN composites characterized by field-emission scanning electron microscope (FESEM). Mechanical and vulcanization behaviors of the as-abtained pruducts were measured according to GB/T 528-2009 and GB/T 16584-1996, respectively. Near properties in tensile strength, elongation at break and vulcanization behaviors were observed in SBR/N330/PBMCN nanocomposites when SBR was partially replaced by PBMCN for 8% mass fraction. A possible reinforcement mechanism of PBMCN to SBR/N330/PBMCN nanocomposites is also dicussed based on the experiment.

Abstract: The arch gear pump is a new kind of gear pump. Based on the mesh characteristics of arch gears, the relations between the operating characteristic and the main parameters of arch gear are analyzed. The conclusion is drawn: the arch gear pump’s non-pocketed oil phenomena can be achieved with opting for the main parameters of arch gear; the pump can work smoothly and get high efficiency.

Abstract: For the interference problem between 3D dimension and solid model caused by model rotation, a self-adaptive algorithm was proposed in this paper. Firstly, three types of dimension interference in 3D model were analyzed. Secondly, the work flow of self-adaptive algorithm was investigated and the key technologies such as interference check, normal adjustment were described in detail. By adjusting the normal of each interfered 3D dimension to non-interference state, the interference problem in this paper can be solved. All the algorithms were realized in a dynamically module based on CAXASOLID. Case study showed that the strategies present are feasible. Finally, the trends and expectation of 3D dimension layout was summarized.

Abstract: For large-area slope turf nursing, existing self-propelled mower is unsuitable to operate on slope while hand-propelled or backpack mower works with intensive labor and low efficiency. The development of LD-1300 crawler mower resolves this problem: being supported with articulated suspension, the generator set is vertical automatically relying on gravitation, at this rate it is suitable to operate on any slope; crawler traveling mechinanics can work for a long distance and climb up abrupt slope; adjustable knife suits grass of different height; suspended knife can be upturned, for convenience of the mower to move and turn; knife protection cover and floating wheel can protect the knife and people and livestock around; retractable lever at both sides of the mower will protect the mower from side flip. Compared with backpack mower, the efficiency of crawler mower is 2.4 times higher and the cost is nearly half. While it can work in high quality and efficiency with low cost, the crawler mower is economical and can be extended in relevant field.

Abstract: Set out from the evolution of optical network to all optical transparent frame,this paper analyzes the major physical impairments in transparent optical network and their constraints on route selection. A novel impairment-aware routing and wavelength assignment algorithm based on flooding path information message is proposed.

Abstract: PEG1000 was used as template to prepare porous TiO₂ film by sol-gel method. The functions of applied potential and concentration of NaHCO₃ to the photoelectrocatalytic degradation of methyl orange on porous and smooth TiO₂ films were investigated. Methyl orange degradation rate has two optimal values at the applied potential of 0.8 V and 1.8 V. The addition of PEG may have negative effect on photoelectrocatalytic activity of TiO₂ film. The degradation rate increases with increasing NaHCO₃ concentration from 0 up to 0.05 mol/l, and then it declines after further increase of electrolyte concentration. After 100 min of reaction, the degradation rates on the films prepared without and with PEG addition are 63.78% and 65.22%, respectively.

Abstract: The amounts of ethanol, HCl and H₂O, and also calcination conditions during sol-gel process of preparing TiO₂ photocatalyst were investigated. Methyl orange adsorption on TiO₂ prepared using different sol compositions is not more than 4% by varying the amount of ethanol, HCl and H₂O. The photocatalytic degradation is related to sol composition, and the optimal composition is composed of 10 ml ethanol, 1.0 ml H₂O, and 0.1 ml HCl. Calcination temperature and time are also important in TiO₂ preparation. The TiO₂ particle prepared at 500 °C for 3 h has the optimal photocatalytic activity. In the irradiation time range up to 100 min, photocatalytic degradation rate constantly increases up to 94.2%.

Abstract: A design of Human-machine interaction system of embedded precision CNC internal grinder which based on touch screen is proposed. The master-slave two-stage control mode is used in the system. By developing interface software, the system achieves the integration interactive control for the internal grinding. The performance of Human-machine interaction is improved and the processing efficiency and communication capabilities are increased.