Nickel powder were fed through Co-axial feeder. The substrate is pre cleaned with Nitric acid to remove grease and dust particles. In order to changing the power the bonding strength between the clad layer and substrate were increased. The laser cladding process were obtained over SS202 plate of size (160 x 120 x 5 mm) with variable travel speed, Laser power and powder feed rate to find the optimal parameter for quicker and effective laser cladding. The parameters and the levels are planned in
Ethylene and the catalyst promoter (HCl) are introduced into the reactor through sparges and effectively all ethylene is converted into ethylbenzene. Low ethylene and high benzene ratios are used in order to give desired yield of ethylbenzene. Most commercial plants operate at the ratio if 0.3-0.35 because as the ratio increased, more side reactions will occur such as transalkylation and isomeric rearrangement. Further alkylation of ethylbenzene will leads to formation of polyalkylbenzenes. The loss in net yield can be recovered by recycling the material to the alkylation
After the desired thickness is deposited the pattern with ceramic mold is allowed to dry in air to harden. • Removing pattern and metal pouring: The ceramic mold is heated to remove the wax pattern which melts and flows out at 150 degrees Celsius and the ceramic mold is further heated to 1000 degree Celsius to remove any impurities, moisture etc. that remains in the mold. When the mold still remains hot the metal is poured; which provides the following benefits – the dimensional accuracy is high as hot mold allows the liquid metal to flow easily allowing better dimensional accuracy and allows thin profiles to be
Then, toluene is added with continuous stirring before transferring the mixture to a separating funnel. The two immiscible layers formed within few minutes. The transfer of metal salts from the aqueous phase to toluene then completes where ethanol is found to be very important candidate without which metal ions would not be transferred to the organic phase by the direct mixing of an aqueous metal precursor solution with an organic solvent containing dodecyl amine. The fact that water and ethanol are miscible ensures the maximum contact between metal ions and dodecyl amine. A large number of commonly used popular methods, e.g., wet chemistry reduction, seed mediated growth, co-reduction, and solvothermal approaches could be adopted to produce metal or semiconductor nanoparticles after the transfer into the organic solvent.
This forces the molten plastic through a sprue into a moulding cavity. A good example of the leftovers of a sprue would be the bottom of a plastic bottle, where a small filed down dot will be visible. The mould is temporarily warmed by heaters while the plastic is injected into the mould, this is to prevent the plastic from prematurely hardening inside the mould, disallowing the mould to be completely filled, creating a defective
SELECTIVE LASER SINTERING Selective laser sintering is a power based rapid prototyping process where it involves method of sintering and building up powder particles heated with a carbon dioxide, (〖CO〗_2) laser beam. The sintering process is when a roller spread the fine powder uniformly on the machine bed and it scanned selectively by a laser of power 25-100W such that the surface tension of the grains is overcome and they are sintered together. First powder is pre-heated to temperature slightly below the sintering temperature of the material by infra-red heaters to minimize thermal distortion and to facilitate fusion to the previous layer. The laser beam then scans the cross-sectional area identified for the current slice, thus sintering of the powder takes place. A fresh layer of powder is deposited again across the part bed, and the process is repeated until the final part has been completed.
Difficult to erase tattoos can also be removed. It is effective for all parts of the body and all types of skin. The Picosure® laser also acts on pigmented spots and permanent makeup of the lips and eyebrows that can be easily removed (beware, transient eyebrow fading is possible). Technical The Picosure® laser delivers very short pulses of light, at the picosecond, which create an intense photo-mechanical impact. During this impact, the particles of the tattoo ink are destroyed in tiny fragments that will be easily removed by the
Mekanik It is a mechanical vaporizer which includes RTV (ready to vape) Telescoping System that enables instant vaping by creating a huge cloud of vapor after twisting of the lock and pushing of the fire button. It is made from stainless steel and includes atomizers for containing e-liquid and silver plated battery contact pins for fine tuning the voltage for customizing the vapor and tasting. 2. Titan It is a revolutionary vaporizer that allows voltage alteration due to its automatic battery, providing an extraordinary taste and vaping experience. It is made from stainless steel and includes special batteries that enable voltage adjustment according to the smoking needs of the user.
Dry-dot-printing – The resin is printed on to the fabric through engraved roller having micro grooves to retain the resin. 3. Paste coated – the net like structure is formed by heating the resin and then it is laminated on the fabric by applying heat and pressure. 8.1.4 Fusing machinery and equipment In spite of what kind of fusible and equipments are used, fusing is controlled by four processing elements, such as, pressure, temperature, time and cooling and these have to be precisely combined in order to achieve the desired results. 1.
Where the laser beam hits the powder, the affected particles fuse together (or sinter) (Figure 3). Another layer of powder is then deposited on top of the previous layer using a roller mechanism, and another slice of the part is sintered onto the sintered material in the previous slice. The unsintered material in each layer can act as a support structure for the part itself. When the part is complete, the unsintered material can simply be brushed off. 1.3.2 Advantages • No post-curing of the parts is needed, unless they are ceramic.