GB667527A - Improvements in gear pumps for molten plastics - Google Patents

Improvements in gear pumps for molten plastics

Info

Publication number
GB667527A
GB667527A GB990450A GB990450A GB667527A GB 667527 A GB667527 A GB 667527A GB 990450 A GB990450 A GB 990450A GB 990450 A GB990450 A GB 990450A GB 667527 A GB667527 A GB 667527A
Authority
GB
United Kingdom
Prior art keywords
rotors
groove
pump
teeth
inlet
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
Application number
GB990450A
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to GB990450A priority Critical patent/GB667527A/en
Publication of GB667527A publication Critical patent/GB667527A/en
Expired legal-status Critical Current

Links

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
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C2/084—Toothed wheels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Rotary Pumps (AREA)

Abstract

667,527. Gear pumps. ABBEY, A. (Dow Chemical Co.). April 21, 1950. No. 9904/50. Class 110(ii). [Also in Group V] A pump has rotors 12 each formed of a number of toothed discs arranged as shown and is intended primarily for feeding molten organic plastic material from an inlet 13 to an outlet 14 between adjustable jaws 27. A filter 22 and strainer plate 23 are provided. Heating jackets 28, 29 are arranged as shown. The teeth may form a helix on the rotor or may be arranged in " herring-bone" " fashion. The material is fed in under pressure and may be supplied by a meshing-screw pump. A groove 16 extends for the whole length of the rotors which are thus supplied from the inlet and the delivery channels 26, 14 also extend for the full length of the rotors. There is little, if any, undercut in each groove between two teeth. External gears couple the rotors together. A spring-loaded relief valve allows a continuous, small discharge from the groove 16 to show that adequate pressure is being maintained on the supply. Extruded strips of other than rectangular crosssection may be produced at 14 by suitably designing the outlet shape. The rotors may also be heated, using electrical means. Bearings 30 are lubricated by the material being pumped, there being a flow under pressure from the pumping chamber. Dimensions of one pump, and its rotor speed, are given in the Specification.
GB990450A 1950-04-21 1950-04-21 Improvements in gear pumps for molten plastics Expired GB667527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB990450A GB667527A (en) 1950-04-21 1950-04-21 Improvements in gear pumps for molten plastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB990450A GB667527A (en) 1950-04-21 1950-04-21 Improvements in gear pumps for molten plastics

Publications (1)

Publication Number Publication Date
GB667527A true GB667527A (en) 1952-03-05

Family

ID=9880946

Family Applications (1)

Application Number Title Priority Date Filing Date
GB990450A Expired GB667527A (en) 1950-04-21 1950-04-21 Improvements in gear pumps for molten plastics

Country Status (1)

Country Link
GB (1) GB667527A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311334A (en) * 1996-03-21 1997-09-24 Ultra Hydraulics Ltd Gear pump with two out of phase gears on a common shaft.
WO2019148007A1 (en) * 2018-01-26 2019-08-01 Waterblasting, Llc Pump for melted thermoplastic materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311334A (en) * 1996-03-21 1997-09-24 Ultra Hydraulics Ltd Gear pump with two out of phase gears on a common shaft.
WO2019148007A1 (en) * 2018-01-26 2019-08-01 Waterblasting, Llc Pump for melted thermoplastic materials
US11174858B2 (en) 2018-01-26 2021-11-16 Waterblasting, Llc Pump for melted thermoplastic materials

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