Explain the purpose of a preplasticizing unit

What will be an ideal response?


In some operations, chiefly where the melting of the resin is the limiting factor in decreasing the cycle, a second barrel or chamber is added to the injection molding machine. This second chamber is the collection point for the melted resin as it exits from the screw or ram melting unit. The second chamber has a ram injector that can push the melt of resin into the mold even while material is being introduced from the melting unit. The combination of a continuous melting operation and an on-demand injection operation can speed molding significantly in some cases.

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Simplify the expression:  36 - (M3 + M) + (M3- 12).

Fill in the blank(s) with the appropriate word(s).

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____ branch circuits shall be protected at the motor nameplate current rating.

A. Transformer B. HVAC C. Torque motor D. Circuit breaker

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An ultra-capacitor is used to store _______

A) Protons B) Electrons C) Air pressure D) Hydrogen

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A tap is driven with:

A) Pliers B) An adjustable wrench C) A tap handle D) A combination wrench

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