WO2017185107A1 - Apparatus and method for dosing an additive into a metered flow of material - Google Patents
Apparatus and method for dosing an additive into a metered flow of material Download PDFInfo
- Publication number
- WO2017185107A1 WO2017185107A1 PCT/ZA2017/050024 ZA2017050024W WO2017185107A1 WO 2017185107 A1 WO2017185107 A1 WO 2017185107A1 ZA 2017050024 W ZA2017050024 W ZA 2017050024W WO 2017185107 A1 WO2017185107 A1 WO 2017185107A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- additive
- cartridge
- dosing
- formation
- flow
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
- B01F23/451—Mixing liquids with liquids; Emulsifying using flow mixing by injecting one liquid into another
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7174—Feed mechanisms characterised by the means for feeding the components to the mixer using pistons, plungers or syringes
Definitions
- THIS INVENTION relates, broadly, to both apparatus and an associated method for dosing an additive into a metered flow of material. More particularly, but not exclusively, the invention has application to liquid and paste additives, and to liquid, powder and granular materials.
- a commonly employed method of dosing liquid or paste additives into plastics materials involves the use of a reservoir-pump system - such as the type that is illustrated schematically in Figure 1.
- the solution comprise a dosing controller (to control a stepper motor), a reservoir (for storing the liquid or paste additive), and a positive displacement pump to dose the additive into a plastic injection or extrusion moulding application.
- That system is unnecessarily complicated, in that it requires pneumatic or hydraulic piping and associated fittings and couplings in order to connect the reservoir to the pump, and the pump to the injection or extrusion moulding machine.
- a number of problems are associated with this.
- the reservoirs will, necessarily, need to be replaced or refilled whenever the supply of additive is depleted - typically, this is a disruptive, messy process, especially given the large number of mechanical parts involved, and, as a result, an appreciable amount of additive tends to be wasted on refilling: this is highly undesirable. all the more so when dealing with caustic or volatile additives, as this also poses a health and safety risk.
- Object Of The Invention ft is an object of the present invention to provide both apparatus and also an associated method of mixing an additive to a materiai. that will overcome, at least partially, the disadvantages described above.
- an apparatus for dosing an additive into a metered flow of materiai comprising:
- the apparatus being connectable to a displacement regulator for regulating selectively the dispersal of additive into the dosing zone.
- the displacement regulator may comprise:
- a push rod being dimensioned and configured to abut the cartridge and. on actuation, to force the additive from the cartridge at a predetermined rate
- the cartridge includes a piston formation, alternatively a plug formation, that is dimensioned and configured complimentari!y to the push rod, to facilitate discharge of the additive from the cartridge on actuation.
- the actuator may be selected from the group consisting of: a lead screw, a hall screw, a linear guide, a linear actuator, a belt-pulley system, and a mechanical device that converts rotational motion into linear motion.
- the cartridge may further comprise a nozzle, the nozzle being dimensioned and configured to dispense additive at an optimal rate, alternatively in an optimal direction, into the dosing zone.
- a method for dosing an additive into a metered flow of material comprising:
- the additive may be a water-based liquid, alternatively a paste, having a viscosity in the range of 1 cP - 2,000,000 cP.
- the additive may be an oil-based liquid, alternatively a paste, having a viscosity in the range of 1 cP - 2,000,000 cP.
- Figure 1 is a schematic representation of a typical liquid / paste dosing system that is disclosed in the prior art
- Figure 2 is an isometric view from above of the dosing apparatus according to a first aspect of the invention
- Figure 3 is a plan view, from above, of the dosing apparatus, also depicting a reservoir of material, in use;
- Figure 4 is a right side view of the dosing apparatus depicted in Figure 2;
- Figure 5 is a transverse section of dosing apparatus depicted in Figure 4, along the line A-A; and is a front view depicting a series of cartridges that are envisaged for use within the apparatus, and in the method according to a second aspect of the invention.
- the guide (10) includes a frame 20, and within it. a slot 30, which acts as a receiving formation for the cartridge 40. that is described in further detail below.
- the apparatus (10) also includes a throat formation 50, and it is through this formation (50) that the feed of materials wi!i be fed during the dosing process, into a zone described as the "dosing zone" 90.
- the apparatus (10) also comprises a motor 70, the purpose of which is to turn actuator (60) - in the accompanying Figures, actuator (50) takes the form of a lead screw.
- a cartridge (40) is pre-packaged with a desired additive (100), having a predetermined concentration.
- the cartridge (40) is sealed hermetically at that point.
- the cartridge (40) has a peculiarly shaped nozzle (120). This is quite intentional: it will be appreciated that the shape and configuration of the nozzle (120) is designed to achieve particular rates of dispersal of the additive (100) from the cartridge (40).
- the cartridge (40) also includes a plug formation (130), that is dimensioned and configured complimentarily to the push rod (80).
- the cartridge (40) is loaded into the slot (30).
- the slot (30) orients the cartridge (40) such that its nozzle (120) is directed to open in the direction of the dosing zone (90).
- the next step in the method occurs in use. Specifically, a batch of material (110) is placed in a reservoir (140) (see, in particular: Figure 3). The material (110) is fed, at a predetermined rate and under gravity, to fail through the throat formation (50). and thence into the dosing zone.
- reservoir (140) has a hopper (not depicted) and is set-up to ensure that the release hatch of the hopper opens into an injection moulding machine (as seen, in part, in Figure 5). It is also conceivable, in other embodiments of the invention, that the hopper opens into an extrusion moulding machine (not depicted).
- the operation of the release hatch is controlled electronically via conventional software program that is hard-coded into the hopper. In this fashion, the feed-rate of the materia! (110) is controlled.
- the next step of the method entails the actuation of the actuator (60), which is turned by operation of the motor (70), causing it (the actuator (60)) to compel the push rod (80) toward the cartridge (40).
- the actuator (60) is turned by operation of the motor (70)
- the actuator (60) to compel the push rod (80) toward the cartridge (40).
- the operative end of the push rod (80) is dimensioned and configured complimentarily to the cartridge (40) (and - more specifically - to the plug formation (130) in the cartridge (40)).
- This causes the additive (110) to be forced towards and then dispersed from the nozzle (120), and into the dosing zone to meet the material (110) that is also being fed through that zone simultaneously.
- the rate of dispersal of the apparatus (10), of course, is proportional to the speed of the push rod (80) on actuation.
- the speed of the push rod (80) is also controlled through the use of a conventional software program that, in this example, is hard-coded into the controller (75), which controls motor (70).
- the controller (75) controls motor (70).
- the invention results in the full volume of additive (100) being dispensed into the dosing zone 90. with none being spilled beyond that region.
- the operator of the apparatus (10) need only remove the (now emptied) cartridge (40) from the slot (30), and replace it with another full cartridge (40), in order to commence the next dosing batch.
- the motor (70) depicted jn the Figures is a traditional stepper motor, the operation of which turns actuator (60) which in turn compels the push rod (80) to move in the direction of the cartridge (40).
- actuator (60) might be used including: a bail screw, a linear guide, a linear actuator, a belt-pulley system, and in fact. any other mechanical device that converts rotational motion into linear motion (none of these alternative embodiments is depicted here). In ail cases, the actuator (60) would be placed in mechanical contact with pushrod (80).
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA201602708 | 2016-04-20 | ||
ZA2016/02708 | 2016-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017185107A1 true WO2017185107A1 (en) | 2017-10-26 |
Family
ID=60116450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ZA2017/050024 WO2017185107A1 (en) | 2016-04-20 | 2017-04-19 | Apparatus and method for dosing an additive into a metered flow of material |
Country Status (1)
Country | Link |
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WO (1) | WO2017185107A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116371232A (en) * | 2023-06-02 | 2023-07-04 | 胜利油田渤海固井工程技术有限责任公司 | Toughening agent production device for well cementation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4881820A (en) * | 1985-01-24 | 1989-11-21 | Reinhardt Technik Gmbh & Co. | Method of and device for proportioning at least one viscous substance |
US20140092704A1 (en) * | 2006-12-15 | 2014-04-03 | 3M Innovative Properties Company | Mixing and dispensing curable multi-component materials |
US20140346251A1 (en) * | 2011-12-21 | 2014-11-27 | Sika Technology Ag | Drive device of a metering and mixing device |
-
2017
- 2017-04-19 WO PCT/ZA2017/050024 patent/WO2017185107A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4881820A (en) * | 1985-01-24 | 1989-11-21 | Reinhardt Technik Gmbh & Co. | Method of and device for proportioning at least one viscous substance |
US20140092704A1 (en) * | 2006-12-15 | 2014-04-03 | 3M Innovative Properties Company | Mixing and dispensing curable multi-component materials |
US20140346251A1 (en) * | 2011-12-21 | 2014-11-27 | Sika Technology Ag | Drive device of a metering and mixing device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116371232A (en) * | 2023-06-02 | 2023-07-04 | 胜利油田渤海固井工程技术有限责任公司 | Toughening agent production device for well cementation |
CN116371232B (en) * | 2023-06-02 | 2023-08-11 | 胜利油田渤海固井工程技术有限责任公司 | Toughening agent production device for well cementation |
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