Heat exchanger apparatus for extruding thermoplastic compositions
US4621678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1984 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Mar 2, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2009/226
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is heat exchange apparatus for controlling the temperature of a resin after leaving an extruder and prior to extrusion through a die in an extrusion process, comprising a heat exchanger having an inlet and outlet for an extruded heat-plastified resin and an inlet and an outlet for a heat exchange medium to be circulated in heat exchanging relationship with the extruded resin; a selective heater for receiving the heat exchange medium from the heat exchanger, the heater heating the heat exchange medium to a predetermined temperature during a start-up phase of the heat exchange device; a cooler adapted for receiving a portion of the heat exchange medium from the heater, the cooler including an inlet and an outlet for the heat exchange medium and an inlet and an outlet for a cooling medium to be circulated in heat exchanging relationship with the heat exchange medium; control means interposed between the heater and the cooler for selectively directing a portion of the heat exchange medium to said cooler in response to a sensed temperature condition and for directing the balance of the heat exchange medium to the heat exchanger; and a pump for circulating the heat exchange med…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.