# US 9,434,099 B2 · Extrusion machine with improved temperature control system

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- Number: US 9,434,099 B2
- Document ID: US9434099B2
- Status: Granted
- Kind: B2
- Application number: 14/360,278
- Filed: 2012-11-19
- Published: 2014-10-30
- Granted: 2016-09-06
- Earliest claimed: 2011-11-23
- Assignees: Semplice S.P.A.
- Applicants: Semplice S.P.A.
- Inventors: Stefano Paoletti
- Web page: https://patentgrep.com/patent/US9434099B2

## CPC

- B29C 48/83: {Heating or cooling the cylinders}
- B29C 48/03: characterised by the shape of the extruded material at extrusion
- B29C 48/65: neighbouring threads or channels having different configurations, e.g. one thread being lower than its neighbouring thread
- B29C 48/655: having three or more threads
- B29C 48/68: Barrels or cylinders
- B29C 48/832: {Heating}
- B29C 48/834: {Cooling}
- B29C 48/92: Measuring, controlling or regulating
- B29C 48/6801: {characterised by the material or their manufacturing process}
- B29C 2948/92209: Temperature
- B29C 2948/924: Barrel or housing
- B29C 2948/92704: Temperature
- B29C 2948/92895: Barrel or housing
- 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)

## Abstract

An extrusion machine with improved structure, comprising an internally hollow extrusion cylinder, at least one heating element associated with the extrusion cylinder, at least one cooling fan which engages the outer surface of the extrusion cylinder, and at least one temperature probe which is inserted in the extrusion cylinder, the temperature probe facing the cavity of the extrusion cylinder and the temperature probe being adapted to be in direct contact with the extrusion material contained in the cavity of the extrusion cylinder.

## Claims

### Claim 1

An extrusion machine with improved structure, comprising an internally hollow extrusion cylinder, at least one heating element associated with said extrusion cylinder, at least one cooling fan which engages an outer surface of said extrusion cylinder, and at least one temperature probe which is inserted in said extrusion cylinder, wherein said temperature probe faces a cavity of said extrusion cylinder, said temperature probe being adapted to be in direct contact with the extrusion material contained in said cavity of said extrusion cylinder;
wherein said at least one temperature probe comprises at least one casing which is removably inserted in said extrusion cylinder and at least one thermocouple which is removably inserted in said at least one casing, said at least one casing being made of a thermally conductive and mechanically strong material adapted to withstand high temperatures in an order of 400° C. and high pressures up to 1000 bars; and
wherein said extrusion cylinder comprises cooling fins which are arranged on an outer lateral surface thereof, said cooling fins having a thickness that can vary longitudinally with respect to an axis of said extrusion cylinder, and said cooling fins having a plurality of helical cuts which extend longitudinally with respect to the axis of said extrusion cylinder.

### Claim 2 (depends on 1)

The extrusion machine according to claim 1, wherein said at least one casing is made of beryllium bronze.

### Claim 3 (depends on 1)

The extrusion machine according to claim 1, wherein said at least one casing has an elongated shape which is adapted to withstand high pressures.

### Claim 4 (depends on 1)

The extrusion machine according to claim 1, wherein said at least one casing is adapted to be screwed and unscrewed with respect to said extrusion cylinder for replacement.

### Claim 5 (depends on 1)

The extrusion machine according to claim 1, wherein said extrusion cylinder and said cooling fins are provided in one piece.

### Claim 6 (depends on 1)

The extrusion machine according to claim 1, further comprising a plurality of cooling fans, which are arranged longitudinally with respect to an axis of said extrusion cylinder discontinuously and alternately, said cooling fans each comprising an outlet which affects various portions of a lateral surface of said extrusion cylinder.

### Claim 7 (depends on 1)

The extrusion machine according to claim 1 wherein said thermally conductive and mechanically strong material is adapted to withstand high temperatures.

### Claim 8 (depends on 1)

The extrusion machine according to claim 1, wherein said cooling fins comprise a smaller thickness proximate to an initial part of said extrusion cylinder and a greater thickness proximate to an outlet of said extrusion cylinder.

### Claim 9 (depends on 8)

The extrusion machine according to claim 8, wherein said cooling fins comprise a region transition from a configuration having said cooling fins with the smaller thickness to a configuration having said cooling fins with the greater thickness.

### Claim 10 (depends on 1)

The extrusion machine according to claim 1, wherein said temperature probe faces said cavity that is internal to said extrusion cylinder and external to an extrusion screw.