Dosing device

• US 20040011569A1
• Filed: 04/04/2003
• Published: 01/22/2004
• Est. Priority Date: 06/14/2000
• Status: Active Grant

• Current Assignee: E.H. Klijn Beheer B.V.
• Original Assignee: E.H. Klijn Beheer B.V.
• Inventors: Klijn, Erik Hans
• Granted Patent: US 6,911,607 B2
• Time in Patent Office: Days
• US Class Current: 177/119
• CPC Class Codes: B01F 23/60 Mixing solids with solids
• CPC Class Codes: B01F 25/90 with moving or vibrating means, e.g. stirrers, for enhancing the mixing
• CPC Class Codes: B01F 35/714 for feeding predetermined amounts B01F35/88 takes precedence
• CPC Class Codes: B01F 35/7173 using gravity, e.g. from a hopper
• CPC Class Codes: B01F 35/71775 using helical screws
• CPC Class Codes: B01F 35/881 by weighing, e.g. with automatic discharge
• CPC Class Codes: B29B 7/38 rotary B29B7/52 takes precedence
• CPC Class Codes: B29B 7/60 for feeding, e.g. end guides for the incoming material B29B7/7615 takes precedence; feeding predetermined amounts for mixing in general B01F35/714
• CPC Class Codes: B29B 7/728 Measuring data of the driving system, e.g. torque, speed, power, vibration B29B7/724 takes precedence
• CPC Class Codes: B29B 7/88 Adding charges , i.e. additives
• CPC Class Codes: B29C 45/1816 Feeding auxiliary material, e.g. colouring material
• CPC Class Codes: B29C 48/03 characterised by the shape of the extruded material at extrusion
• CPC Class Codes: B29C 48/29 in liquid form
• CPC Class Codes: B29K 2105/0005 containing compounding ingredients releasing, lubricating or separating agents B29C33/56, fibers B29K2105/08, B29K2105/12; fillers B29K2105/16, recycled material B29K2105/26
• CPC Class Codes: G01G 19/343 involving digital counting

Abstract

The invention relates to a dosing device for mixing additive into a basic flow, comprising: a passage for the basic flow; an inlet for the additive in the passage; a container for the additive connected to the inlet via a dosing mechanism and having a controllable drive for discharge of the additive into the inlet; weighing means for determining the weight of at least the container with the additive; and a control for the drive which is connected to the weighting means for setting a dosed discharge, wherein the dosing mechanism is arranged on the inlet via the weighing means.

Claims

1. Dosing device for mixing additive into a basic flow, comprising:

a passage for the basic flow;

an inlet for the additive in the passage;

a container for the additive connected to the inlet via a dosing mechanism and having a controllable drive for discharge of the additive into the inlet;

weighing means for determining the weight of at least the container with the additive; and

a control for the drive which is connected to the weighing means for setting a dosed discharge, wherein the dosing mechanism is arranged on the inlet via the weighing means.

2. Device as claimed in claim 1, wherein the weighing means comprise a compensation for shifting the centre of gravity of the container with the additive therein.

3. Device as claimed in claim 1 or 2, wherein the weighing means comprise a load cell.

4. Device as claimed in claims 2 and 3, wherein the load cell is of the off-centre type.

5. Device as claimed in one or more than one of the foregoing claims, wherein the inlet comprises a neck part, through which the passage extends, and with an opening forming the inlet for loosely receiving therein an outlet of the dosing mechanism.

6. Device as claimed in one or more than one of the foregoing claims, wherein the dosing mechanism comprises a worm screw in a cylinder which is connected to the drive and forms a dosing cylinder, wherein the worm screw and the cylinder form a unit.

7. Device as claimed in claim 6, wherein the characteristic of the discharge in mass per unit of time relative to the rotation speed of the dosing cylinder is non-linear and the control is adapted to bring about with a corrective algorithm an adjustable dosed discharge by adjusting the rotation speed of the dosing cylinder caused by the drive on the basis of determinations of weight made by the weighing means.