Cam pump for the production of alternating sequences of polymer flow pulses
AssigneeBASF SE
InventorJohn A. Hodan
Life of this patent
Estimating the term…
Abstract
Disclosed is a cam pump with two sets of driving and driven pump cams, which receive polymer melt from an extruder and exit the polymer melt through two exit channels in a sequence of 1/2 volume unit, followed by a 0 volume unit, followed by 1 volume unit for one exit channel and simultaneously in a sequence of 1/2 volume unit followed by a 1 volume unit, followed by 0 volume unit for the second exit channel. The cam pump is used in a apparatus for melt mixing and spinning synthetic polymers for the manufacture of yarns with a multiplicity of bundles of filaments, whereby the properties of all filaments in all bundles alternate along their length and the properties of the filaments of each bundle of adjacent bundles alternate between the adjacent bundles.
Claims10
A cam pump for the production of alternating sequences of polymer melt flow pulses, which comprises:
- a) a housing, comprising
- a1) a top plate, comprising a bore and a bearing;
- a2) a first cam plate, being adjacent to the top plate and comprising a first bore and a second bore, being adjacent to each other;
- a3) a first divider plate, being adjacent to the first cam plate and comprising a first bore and a second bore;
- a4) a second cam plate, being adjacent to the first divider plate and comprising a first bore and a second bore, being adjacent to each other
- a5) a second divider plate, being adjacent to the second cam plate and comprising a first bore and a second bore;
- a6) a gear plate, being adjacent to the second divider plate and comprising a first bore and a second bore, being adjacent to each other;
- a7) a bottom plate, being adjacent to the gear plate and comprising a first bearing and a second bearing;
- b) a driving arbor, being freely rotatable located within the bore of the top plate, the first bore of the first divider plate, within the first bore of the second divider plate and within the first bearing of the bottom plate;
- c) a driven arbor, being freely rotatable located in the bearing of the top plate, within the second bore of the first divider plate, within the second bore of the second divider plate and within the second bearing of the bottom plate;
- d) a first driving pump cam, being fixedly connected to the driving arbor and being freely rotatable located within the first bore of the first cam plate;
- e) a first driven pump cam, being fixedly connected to the driven arbor and being freely rotatable located within the second bore of the first cam plate, and being adjacent to the first driving pump cam;
- f) a second driving pump cam, being fixedly connected to the driving arbor and being freely rotatable located within the first bore of the second cam plate;
- g) a second driven pump cam, being fixedly connected to the driven arbor and being freely rotatable located within the second bore of the second cam plate and being adjacent to the second driving pump cam.
- h) means for transmitting a rotation of the driving arbor to the driven arbor, connected to the driving arbor and the driven arbor;
- i) a feeding channel, being connected to the second bore of the second cam plate;
- j) two exit channels which comprise
- j1) a first exit channel, being connected to the second bore of the first cam plate;
- j2) a second exit channel, being connected to the second bore of the second cam plate;
- the first driven pump cam and the second driven pump cam comprising means for receiving polymer melt from the feeding channel and exit polymer melt through the first exit channel in a sequence of a half volume unit, followed by zero volume unit, followed by one volume unit, and simultaneously through the second exit channel in a sequence of a half volume unit, followed by one volume unit followed by zero volume unit.
Dependencies are inferred from the claim text.