# US 4,395,210 A · Apparatus for manufacture of turbulence member made of synthetic resin

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- Number: US 4,395,210 A
- Document ID: US4395210A
- Status: Granted
- Kind: A
- Application number: 06/323,704
- Filed: 1981-11-20
- Granted: 1983-07-26
- Earliest claimed: 1980-11-21
- Assignees: Mihama Manufacturing Co., Ltd.; Kato Hatsujo Kaisha, Ltd.
- Inventors: Mamoru Hama
- Web page: https://patentgrep.com/patent/US4395210A

## CPC

- B29C 53/14: Twisting {(for textile fibres D01H)}
- B29C 48/12: Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
- B29C 48/13: Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
- B29C 48/301: {having reciprocating, oscillating or rotating parts}
- F28F 13/12: by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F13/08 takes precedence)
- B29C 48/0022: {combined with cutting}
- B29L 2031/18: Heat-exchangers or parts thereof
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

Turbulence members made of a synthetic resin are manufactured by a method which comprises melting a synthetic resin and causing the molten resin to be rotated around its axis and at the same time extruded in a state wherein the molten resin is spirally twisted by use of an extruding means provided with a rotary nozzle having a slit, passing the extruded molten resin under water in a cooling means thereby cooling and solidifying the extruded resin and drawing the resultant resin with a drawing means. The cooling means is provided with a relatively narrow and relatively wide chamber to facilitate uniformity and efficiency of production.

## Claims

### Claim 1

In an apparatus for the manufacture of turbulence members made of a synthetic resin, which comprises:
(a) an extruding machine provided with an extrusion outlet for melting therein a synthetic resin by heat and extruding the molten resin out of said extrusion outlet,
(b) a rotary nozzle rotatably attached to the leading end of said extrusion outlet and provided with a slit for allowing the molten resin to be rotated around its axis and simultaneously extruded from said slit in the horizontal direction,
(c) a water vessel filled with water and tightly closed on the upper portion thereof for cooling and solidifying therein the molten resin extruded from said slit, and
(d) a drawing device for drawing the resin cooled and solidified in said water vessel,
the improvement wherein said water vessel is divided by a partition wall into a first relatively narrow cooling chamber and a second relatively wide cooling chamber,
the lateral wall of said first narrow cooling chamber on the rotary nozzle side, said partition wall and the lateral wall of said second wide cooling chamber on the drawing device side each being provided with an aperture of a diameter slightly larger than the outside diameter of the resin extruded from said slit so as to be aligned with one another,
said first narrow cooling chamber being connected to a water-supplying means, and
said second wide cooling chamber being connected to a suction pipe having the upper end thereof opening to the interior of said water vessel so as to be positioned at a higher level than the level of said apertures and having the lower end thereof connected to a suction pump.