| 摘要 |
Mixing apparatus for liquid plastics, such as polyesters, polyurethane elastomers and polyurethane foams, and liquid additives to same, for effecting certain reactions, characterized by a plurality of mixing rotors which may be optionally employed with basic drive mechanism and liquid supply conduits, common to all rotors, to thereby provide apparatus of variable utility, for the various plastics, by minimizing the number of operative parts required. For certain foaming plastics, air is aspirated into the rotor mixing chamber to provide the required air for initiating foaming by subsequent chemical reaction. For other plastics which require a high shearing action during mixing, alternative forms of rotors are employed which move the plastic in a tortuous path for effecting such action. All rotors are driven at the same speed by a direct drive motor which rotates at 1,700-1,800 r.p.m. (four pole motor) as distinguished from former required speeds of the order of 6,000 r.p.m. |
