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Q. What do you mean by Compression moulding?
In compression molding, a material normally in power or perform shape , is loaded directly into the hot die cavity, pressure from 150 to 700 kg/cm2 is applied , held for a curing period and then the finished part is ejected. Press stays closed while the heat cures hardens and sets the plastic part. The time for curing depends upon the design, small thin-wall pieces require as little as 20 seconds. The curing temperature is to the order of 200 C. Compression molding is largely utilized for molding thermosetting materials.
A measured amount of power plastics is placed in the power female cavity continuously heated by steams or electricity. The movable bolster is raised so that the female mold portion contacts the male die which also is heated. The combined effect of temperature and pressure causes the plastic to flow into the mold cavity.
Spar k Ignition Engines (or S.I. Engine): It works on otto cycle. In Otto cycle, energy supply and rejection occur at the constant volume process and compression and expansio
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Q. Functional areas of geometric modeling? Drafting • Automatic planar cross-sectioning. • Automatic hidden lines and surface removal. • Automatic production of s
Consider a simple single machine system. It consists of workpieces that enter the system, wait their turn to be processed on a single machine, and then depart the system. The workp
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a.The closest point to discharge treated effluent is a lake, but the pipeline is extended so it discharges into the river draining the lake. This allows a conventional secondary tr
Q. How can you implement chemically coated sand? Chemically coated sand : Clean silica grains are sometimes coated with a non thermosetting hydrocarbon resin, which acts as a
Question: A 3-phase, 15 kV, 4-pole, cylindrical rotor synchronous generator is connected to infinite bus running at 50 Hz. The synchronous reactance of the machine is X s = 0.
we can use in proove of energy is a propertyof system we can use (E) instead of (dQ-dW)
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