| 摘要 |
<p>Apparatus is disclosed for conducting relatively hot molten thermoplastic material from a furnace and delivering the material at a desired homogeneity to a remote location. The apparatus includes a conduit means having an inlet adapted to receive the material at one end from the furnace and an outlet for delivering same to the remote location. There may also be provided a flow control device in flow communication with the outlet of the conduit means for regulating the flow of the thermoplastic material from the furnace at a controlled rate and head. A refractory structure located in spaced relation about the conduit means and flow control device defines a space thereabout for the introduction of thermoplastic material. Means is provided for blocking or preventing flow communication between the furnace and the remote location exterior of the conduit means thereby preventing flow of thermoplastic material in bypassing relation with the conduit means. The conduit means, flow control device and blocking means are preferably fabricated of an oxidizable refractory metal and are maintained immersed in thermoplastic material when exposed to temperatures above an oxidation temperature thereof. Heat exchange may be provided for temperature control of the glass. A method is described for conveying and conditioning the thermoplastic material and blocking flow communication of the material exterior of the flow path between the inlet and the outlet end thereof.</p> |
