WO2003016012A1 - Pompe a engrenage pour melanges caoutchouteux - Google Patents
Pompe a engrenage pour melanges caoutchouteux Download PDFInfo
- Publication number
- WO2003016012A1 WO2003016012A1 PCT/EP2002/008971 EP0208971W WO03016012A1 WO 2003016012 A1 WO2003016012 A1 WO 2003016012A1 EP 0208971 W EP0208971 W EP 0208971W WO 03016012 A1 WO03016012 A1 WO 03016012A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- booster
- toothed wheels
- screws
- pump according
- enclosure
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
- B29C48/37—Gear pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
Definitions
- the present invention relates to positive displacement pumps intended in particular for rubber mixtures and, more particularly, gear pumps.
- volumetric gear pumps for high viscosity plastic materials such as that described in publication US 5 120 206.
- a gear comprising a motorized toothed drive wheel, "driving wheel”, and a second wheel in engagement with the first and driven in rotation by the latter, as well as a booster screw which makes it possible to forcefully feed said pump of high viscosity plastic material.
- the rubber mixtures also have a very high viscosity which causes a very high resistive torque on the driving wheel.
- This resistant torque is all the more important when one seeks to achieve high flow rates by increasing the width of the toothed wheels.
- the subject of the invention is a reliable gear pump for rubber mixtures and a simplified embodiment of the mechanical control of the various organs of the pump, in particular when it is force-fed by a screw.
- the gear pump comprising an enclosure in which two toothed wheels rotate meshing with each other, comprising a feed chamber in which acts a force-feeding means for discharging the material towards said enclosure through '' a passage opening, is characterized by that each of the toothed wheels is driven by a motor torque acting on their axes.
- This arrangement allows the transmission of a motor torque to each toothed wheel of the gear making the pump more reliable while maintaining a forced supply necessary for use for rubber mixtures.
- FIG. 1 is a longitudinal section of the pump according to the invention along the line I-I shown in FIG. 2,
- FIG. 2 is a radial section of the pump according to the invention according to line II-II shown in FIG. 1,
- FIG. 3 is a partial longitudinal section of the pump according to the invention according to line III-III shown in FIG. 2.
- the gear pump 1 comprises a body 10 comprising an enclosure 12 carrying a gear whose function is to pump volumetrically.
- This gear itself comprises two toothed wheels 2 of the same diameter (FIG. 2), the two toothed wheels 2 meshing with each other but without contact between the teeth, that is to say without being engaged, so in particular to avoid driving one of the gears by the other.
- the body 10 carries a feeding means which essentially consists of two screws 3, rotating respectively in a supply chamber 4.
- a feeding means which essentially consists of two screws 3, rotating respectively in a supply chamber 4.
- the preferred mode described here presents a particularly advantageous solution for an application to rubber mixtures in order to avoid excessive heating of said mixtures, in particular by controlling the cooling of the screws more effectively.
- the axis of each of the toothed wheels is itself directly driven by one of the booster screws 3.
- the axis of rotation of the booster screws 3 and the axis of rotation of the gear wheels 2 are aligned.
- Each of the wheels 2 is mounted directly on one of the booster screws 3. As a result, the screws rotate in opposite directions to one another.
- the design of the rubber mixture drive threads is designed so that the two screws both contribute to the force-feeding of the gear. In this embodiment, the screws are not engaged but meshing, this characteristic not being limiting.
- the supply and pressurization chambers 4 have, on the side opposite the gear, a supply orifice 11 serving to supply the pump. At the other end of these supply chambers 4, is located a passage orifice 5 ensuring communication between the supply and pressurization chambers 4 and the enclosure 12 containing the gear as seen on Figure 3. Downstream of the gear wheels 2, the enclosure 12 opens onto an outlet orifice 9 of the mixture.
- the most advantageous arrangement consists in extending the shaft carrying the booster screw 3 beyond the supply chamber on the side of the orifice. supply 11. Indeed, at this location, the supply chamber 4 is not under pressure, therefore there is no problem of tightness to fear at the bearings supporting the booster screws.
- a gear 6 transmits and distributes the engine torque on each of the booster screws.
- One 7 of the shafts of this gear 6 is itself driven by a motor, not shown.
- an orifice 15 disposed in the enclosure 12 makes it possible to evacuate any overpressure at the level of the toothed wheels 2.
- a rubber mixture is introduced through the feed orifice 11, in a form which can be either a continuous strip or granules. The mixture is thus distributed over the two booster screws 3.
- the rubber mixture is discharged by being pressurized up to the passage orifice 5 which leads it into the enclosure 12 in the air gap of the two counter-rotating toothed wheels 2.
- the rubber mixture emerges through the outlet orifice 9 outside of the pump 1.
- the essential aspect of the present invention is to drive each of the toothed wheels 2 in rotation, by acting on each of the axes, and not to adopt the usual arrangement of driving wheel and driven wheel.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR01/10878 | 2001-08-16 | ||
FR0110878 | 2001-08-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003016012A1 true WO2003016012A1 (fr) | 2003-02-27 |
Family
ID=8866579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/008971 WO2003016012A1 (fr) | 2001-08-16 | 2002-08-09 | Pompe a engrenage pour melanges caoutchouteux |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2003016012A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018234711A1 (fr) * | 2017-06-22 | 2018-12-27 | Compagnie Generale Des Etablissements Michelin | Installation et procede de coextrusion |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58197034A (ja) * | 1982-05-12 | 1983-11-16 | Toshiba Mach Co Ltd | 2軸押出機 |
US4642040A (en) * | 1985-08-23 | 1987-02-10 | Normag Corporation | Extruder drivingly connected to gear pump |
US5120206A (en) * | 1991-04-08 | 1992-06-09 | Bridgestone/Firestone, Inc. | Gear metering pump for compounded elastomeric material |
EP0642913A1 (fr) * | 1993-09-15 | 1995-03-15 | Bayer Ag | Extrudeuse à vis unique avec pompe à engrenages |
JP2000033639A (ja) * | 1998-07-17 | 2000-02-02 | Daihan:Kk | 歯車ポンプ式押出機 |
WO2000023251A1 (fr) * | 1998-10-21 | 2000-04-27 | Natural Colour Kari Kirjavainen Oy | Procede d'extrusion, extrudeuse et produit ainsi obtenu |
WO2000053390A1 (fr) * | 1999-03-11 | 2000-09-14 | A-Z Formen-Und Maschinenbau Gmbh | Extrudeuses monorotor |
-
2002
- 2002-08-09 WO PCT/EP2002/008971 patent/WO2003016012A1/fr not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58197034A (ja) * | 1982-05-12 | 1983-11-16 | Toshiba Mach Co Ltd | 2軸押出機 |
US4642040A (en) * | 1985-08-23 | 1987-02-10 | Normag Corporation | Extruder drivingly connected to gear pump |
US5120206A (en) * | 1991-04-08 | 1992-06-09 | Bridgestone/Firestone, Inc. | Gear metering pump for compounded elastomeric material |
EP0642913A1 (fr) * | 1993-09-15 | 1995-03-15 | Bayer Ag | Extrudeuse à vis unique avec pompe à engrenages |
JP2000033639A (ja) * | 1998-07-17 | 2000-02-02 | Daihan:Kk | 歯車ポンプ式押出機 |
WO2000023251A1 (fr) * | 1998-10-21 | 2000-04-27 | Natural Colour Kari Kirjavainen Oy | Procede d'extrusion, extrudeuse et produit ainsi obtenu |
WO2000053390A1 (fr) * | 1999-03-11 | 2000-09-14 | A-Z Formen-Und Maschinenbau Gmbh | Extrudeuses monorotor |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch Week 200017, Derwent World Patents Index; Class A32, AN 2000-189654, XP002197264 * |
PATENT ABSTRACTS OF JAPAN vol. 008, no. 040 (M - 278) 21 February 1984 (1984-02-21) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018234711A1 (fr) * | 2017-06-22 | 2018-12-27 | Compagnie Generale Des Etablissements Michelin | Installation et procede de coextrusion |
FR3067963A1 (fr) * | 2017-06-22 | 2018-12-28 | Compagnie Generale Des Etablissements Michelin | Installation et procede de coextrusion |
CN110770000A (zh) * | 2017-06-22 | 2020-02-07 | 米其林集团总公司 | 用于共挤出的装置和方法 |
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