EP0694126B1 - Spinnpumpe für polyamide - Google Patents

Spinnpumpe für polyamide Download PDF

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Publication number
EP0694126B1
EP0694126B1 EP95906876A EP95906876A EP0694126B1 EP 0694126 B1 EP0694126 B1 EP 0694126B1 EP 95906876 A EP95906876 A EP 95906876A EP 95906876 A EP95906876 A EP 95906876A EP 0694126 B1 EP0694126 B1 EP 0694126B1
Authority
EP
European Patent Office
Prior art keywords
bores
plate
spinning
central plate
spinning pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95906876A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0694126A1 (de
Inventor
Luzius Berger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExNex AG
Original Assignee
Rhone Poulenc Filtec AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhone Poulenc Filtec AG filed Critical Rhone Poulenc Filtec AG
Publication of EP0694126A1 publication Critical patent/EP0694126A1/de
Application granted granted Critical
Publication of EP0694126B1 publication Critical patent/EP0694126B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet

Definitions

  • the invention relates to a spinning pump for melt spinning of polyamides consisting of a front plate, one Back plate, a middle plate with a hole with Partial circular cross section for the supply of the melt and a hole with a circular cross section for the removal of the melt and a pair of gears.
  • melt spinning polyamide 6.6 can be in one continuous operation after a certain term decrease the quality of the filaments produced.
  • the cause was in the melt part of the plant and in Starting polymer wanted. It has now been found that Deposits of cracked polyamide 6.6 in the Spinning pumps one of the causes of reduced quality, which is also noticeable in high fluff numbers can.
  • Gear pumps for melt spinning polymer melts are known (EP-A2-0 447 766).
  • the well-known spinning pumps are connected to a spinning pump block, which as Connection between an extruder and the spinnerets serves.
  • the channels of the spinning pump block are directly with connected to the drilling channels of the spinning pump.
  • the object of the invention is a dead zone free Spinning pump for melt spinning polyamide 6.6 for To make available, that one to ensure an incrustation-free operation to achieve improved quality.
  • Another task is to increase productivity the continuous melt spinning process of polyamide 6.6.
  • the object is achieved in that the holes with the part-circular cross-sections the front of the center plate are designed that the cross-sectional area of the holes against the Back of the middle plate is reduced and the Centers of the part-circular holes against which Back of the middle plate has a parabolic profile consequences.
  • the parabolic profile enables a dead zone free continuous operation.
  • the profile of the Pitch circle centers of the holes on the back of the Middle plate ends in such a way that the free pitch area of the Holes is as small as possible, but preferably against Zero strives.
  • the free cross-sectional area according to the invention understand which is a circle minus the imaginary two circular subareas, which are rotated by one Tooth of the two gears from the cross-sectional area is cut off.
  • reference numeral 1 is a spinning block designated. One does not run in the spinning block 1 with one shown extruder connected channel 2 and one with a not shown spinneret connected channel 3. With the Spinning block 1 is the spinning pump via a Pump protection plate 4 firmly connected.
  • the essential Parts consist of a front plate 5 and one Middle plate 6.
  • the end against an engine M forms a back plate 7.
  • the back plate 7 closes in the Usually a base plate.
  • Fig. 2 shows a section A-A of FIG. 1 through the front part of the middle plate 6 of a gear pump.
  • the gears are designated 8.8 '. They are in Bores 9,9 'arranged.
  • a hole 10 with Partial circular cross section is with channel 2 connected and a bore 10 'with the channel 3rd connected.
  • the diameters of channels 2 and 3 are the same like the diameter of the holes 10, 10 'of the middle plate 6 to the front plate 5.
  • the running direction of the gears is indicated by arrows.
  • Fig. 3 the middle plate is shown in profile. Of the Section shows a front 6 'and a back 6 " the middle plate 6. On the front 6 'are the cylindrical bores 9 and 9 'for receiving the Gears 8,8 'shown. An edge 12a and an edge 12b of the bore 10 collide at a point 11; the edges 12a 'and 12b' of the bore 10 'meet in one Point 11 'together.
  • Fig. 4 is a section B-B of Fig. 2. From the Front 6 'of the middle plate 6 run an edge 13, and an edge 13 'and meet at point 11' together. The lines 13a, 13a 'describe the profiles of the center points.
  • a melt is used Extruder pressure pressed through the channel 2 of the bore 10. Due to the opposite rotation of the gears 8 and 8 ' the melt from the bore 10 into the bore 10 ' promoted. From the bore 10 'the melt is with increased pressure through channel 3 of a not shown Spinneret fed.
  • the spinning pump according to the invention enables one Dead zone-free funding and an increase in productivity by more than 10%. Deposits of cracked PA 6.6 are practically prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Rotary Pumps (AREA)
EP95906876A 1994-02-14 1995-02-07 Spinnpumpe für polyamide Expired - Lifetime EP0694126B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH427/94 1994-02-14
CH42794 1994-02-14
PCT/CH1995/000029 WO1995022002A1 (de) 1994-02-14 1995-02-07 Spinnpumpe für polyamide

Publications (2)

Publication Number Publication Date
EP0694126A1 EP0694126A1 (de) 1996-01-31
EP0694126B1 true EP0694126B1 (de) 1998-06-03

Family

ID=4186779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95906876A Expired - Lifetime EP0694126B1 (de) 1994-02-14 1995-02-07 Spinnpumpe für polyamide

Country Status (7)

Country Link
US (1) US5618172A (ja)
EP (1) EP0694126B1 (ja)
JP (1) JP2961119B2 (ja)
CN (1) CN1062645C (ja)
DE (1) DE59502392D1 (ja)
ES (1) ES2121344T3 (ja)
WO (1) WO1995022002A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2195661T3 (es) * 1998-10-01 2003-12-01 Dow Global Technologies Inc Bomba de engranajes para bombear fluidos de alta viscosidad.
DE102009029522A1 (de) * 2009-09-17 2011-03-24 Robert Bosch Gmbh Zahnradpumpe mit zwei rotierenden Pumpelementen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE518993C (de) * 1931-02-21 Barmag Barmer Maschf Einrichtung zum Druckausgleich fuer Kunstseide-Spinnpumpen
US2460649A (en) * 1942-03-07 1949-02-01 Geza W Muiler Gear pump with flow cushioning means
FR948868A (fr) * 1947-06-24 1949-08-12 Perfectionnement aux pompes à engrenages
DE1553125A1 (de) * 1965-02-20 1970-04-30 Maschf Augsburg Nuernberg Ag Zahnradpumpe
US3817668A (en) * 1969-05-28 1974-06-18 K Mayer Gear wheel pump with feed passage of constant hydraulic cross section
GB2169350B (en) * 1985-01-05 1989-06-21 Hepworth Plastics Ltd Gear pumps
JP2552857B2 (ja) * 1987-04-06 1996-11-13 カヤバ工業株式会社 ギヤポンプ
DE4007858C1 (en) * 1990-03-13 1991-08-14 Rhone-Poulenc Rhodia Ag, 7800 Freiburg, De Rotary liquid pump - has pump coupled to block by symmetrically placed fastening screws

Also Published As

Publication number Publication date
JP2961119B2 (ja) 1999-10-12
JPH08510529A (ja) 1996-11-05
CN1123049A (zh) 1996-05-22
ES2121344T3 (es) 1998-11-16
DE59502392D1 (de) 1998-07-09
EP0694126A1 (de) 1996-01-31
WO1995022002A1 (de) 1995-08-17
CN1062645C (zh) 2001-02-28
US5618172A (en) 1997-04-08

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