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WO1999048601A1 - Melangeur/distributeur multicomposant - Google Patents

Melangeur/distributeur multicomposant Download PDF

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Publication number
WO1999048601A1
WO1999048601A1 PCT/EP1999/002032 EP9902032W WO9948601A1 WO 1999048601 A1 WO1999048601 A1 WO 1999048601A1 EP 9902032 W EP9902032 W EP 9902032W WO 9948601 A1 WO9948601 A1 WO 9948601A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
pump
dispensing
motor
mixing
Prior art date
Application number
PCT/EP1999/002032
Other languages
English (en)
Inventor
Remco Sijtze Schoppen
Gertjan Kroeze
Original Assignee
Remco Sijtze Schoppen
Gertjan Kroeze
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 Remco Sijtze Schoppen, Gertjan Kroeze filed Critical Remco Sijtze Schoppen
Priority to AU35992/99A priority Critical patent/AU3599299A/en
Publication of WO1999048601A1 publication Critical patent/WO1999048601A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7438—Mixing guns, i.e. hand-held mixing units having dispensing means
    • B29B7/7447—Mixing guns, i.e. hand-held mixing units having dispensing means including means for feeding the components
    • 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
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]

Definitions

  • the present invention relates to an apparatus for mixing two or more components and dispensing the mixed substance .
  • the invention is particularly, but not exclusively, concerned with mixing two or more components which, when combined, cure as a resin or adhesive or other curable substance.
  • 3M for example, have a two-component adhesive sold in twin syringes with plungers, when pressed down both cylinders dispense into static mixer. This system is also used for glues, in small industries, operated by hand or pneumatically.
  • One particular application is painting on glass, for example to form stained glass-effect window designs and signs, etc.
  • a continuous, constant flow of mixed resin must be dispensed in a precise pattern.
  • a two-component resin system comprising a viscous resin having a thick consistency, and a very thin, transparent resin.
  • the viscous resin is used to make an outline of a desired image which simulates the lead of stained glass.
  • This viscous resin is formed by mixing two components in equal proportions by hand.
  • the mixed resin is then transferred into a plastic squeeze bottle and is then squirted out, by applying pressure to the bottle, onto the glass sheet. Usually, a drawing of the desired image is placed underneath the glass.
  • the resin is formed of two components which, when mixed, cure reasonably quickly. Colour may then be applied to the glass within the outline. The colouring is done by mixing the components of the thin transparent resin in a ratio of 5:2 and adding one or more colour concentrates to obtain the desired colour. The fill-in colour may be applied using a pipette.
  • the present invention aims to provide a mixing and dispensing system for producing a continuous constant - 3 - flow of resin which can be dispensed in a very precise manner .
  • the invention comprises two or more fluid reservoirs each containing a fluid component; two or more pumps one pump associated with each reservoir; means for driving the pumps to convey the fluid components separately to a mixing head; means for mixing the fluids and means for dispensing the mixed fluid.
  • an apparatus for mixing and dispensing a fluid comprising a first fluid reservoir, a first fluid pump having an inlet port and an outlet port, said inlet port being in fluid communication with said first reservoir, a second fluid pump having an inlet port and an outlet port, said inlet port being in fluid communication with said second reservoir, means for driving said pumps, said means for drdiving being in the form of one or more motors; a mixing head, a first tube for fluid communication between the outlet port of the first pump and the mixing head, a second tube for fluid communication between the outlet port of the second pump and the mixing head, and a dispensing tip through which mixed fluid is dispensed; said apparatus further comprising means for switching said motor on and off, and means for causing said motor to reverse a small number of turns after being switched off.
  • an apparatus for mixing and dispensing of fluid comprising two or more fluid reservoirs and two or more pumps, one pump being associated with each reservoir, further comprising means for driving the pump to convey fluid from the reservoirs to a mixing and dispensing head; and wherein one or more of the reservoirs is in the form of a cylindrical collapsible container having a closed end and an open end, the cylindrical walls of the container having a concertina or bellows structure allowing the container to become - 4 - compressed in height as fluid is drawn from the container.
  • an apparatus for mixing and dispensing of fluid comprising two or more fluid reservoirs and two or more pumps, one pump being associated with each reservoir, further comprising means for driving the pump to convey fluid from the reservoirs to a mixing and dispensing head; and wherein the mixing and dispensing head is adapted to be driven by a program controlled XYZ plotter adapted to move the mixing and dispensing head in a predefined pattern according to a program.
  • an apparatus for mixing and dispensing of fluid comprising two or more fluid reservoirs each containing a fluid component: two or more pumps, one pump associated with each reservoir; means for driving the pumps to convey the fluid components separately to a mixing head; means for mixing the fluids and means for dispensing the fluid; wherein power is provided to the means for driving the pump by one or more batteries installed in a housing containing the two or more pumps and the means for driving the pump .
  • Fig. 1 shows a schematic view of a simple system according to the present invention.
  • Fig. 2 is a perspective view of one embodiment of the invention.
  • Fig. 3 is a schematic view of the pump and motor mechanism inside the housing of the embodiment shown in Fig. 2.
  • Fig. 4 is an exploded view showing the connection of a preferred type of container to the housing of an embodiment as shown in Fig . 2.
  • Figs. 5, 6 and 7 show alternative embodiments of a - 5 - system according to the present invention.
  • Fig. 1 shows a basic device separating according to the present invention.
  • the embodiment shown in Fig. 1 is for mixing two components and, therefore, comprises two containers 1 - one container for each component .
  • Each container 1 has an associated small gear wheel pump 2 connected to draw the component from the respective container 1.
  • Tubes 3 are connected to the output of the pumps 2.
  • the other end of each of the tubes 3 is connected to a mixing/dispensing head 4 to which is attached a standard static mixer 5 with a dispensing tip 6.
  • the pumps when operated, draw the resin components out of the containers and pump it to the mixing tip, via the respective tubes 3.
  • the two components are therefore kept separate until they are combined in the actual dispensing head.
  • the components are then mixed together in the static mixer just before they are dispensed onto the glass via the dispensing tip 6. This prevents the components mixing together and curing too soon which may lead to the system clogging up, if only a small amount of resin is required. In that case, the entire system would need to be cleaned or replaced.
  • the pump mechanisms and controls are arranged in a compact housing 7 and the containers 1 are mounted on top of the housing in fluid communication with the pumps 2 inside the housing 7.
  • One small gear wheel pump 2 is associated with each fluid container 1.
  • Each pump has an input port connected to the outlet of its associated container, and an output port, to which an outlet tube 3 is connected.
  • the pumps are operated by a motor 8 to draw fluid from the respective container 1 and to pump the fluid through a respective tube 3, in a continuous flow, to the mixing and dispensing head 4.
  • the pumps are, in the most simple embodiment, small pumps which require only a low wattage motor to run them. - 6 -
  • the two pumps 2 may be driven by a single motor 8.
  • the preferred motor is a small DC rotary motor which rotates a toothed gear wheel 9 which engages with a gear wheel 10 of each of the pumps 2 so as to rotate the respective pump gear wheels at the same speed to drive the pumps .
  • the pumps may be driven by a stepper motor, a servo motor or some form of feedback motor, all of which can be advantageous.
  • each pump can be driven by a separate motor, operating at different speed, such that the pumps are driven to pump the respective fluids at different speeds .
  • the two pumps 2 may be driven by the same motor but the pumps may be different sizes, or the gear wheel arrangement may be such that the gear ratio of the motor to one pump is different to that of the motor to the other pump.
  • the motor may be controlled in a simple on-off switch provided, for example, on the front of the pump housing 7 or on the mixing/dispensing head 4.
  • the motor may be controlled by means of a microprocessor and an electronic control circuit.
  • the microprocessor can be programmed with, for example, pre-set speeds and pumping amounts and/or times.
  • dials or knobs may be provided on the outside of the pump housing 7 to allow the pump speeds and/or time or quantity to be set and/or varied.
  • a keypad may be provided on the housing to change and store pre-defined - 7 - pump speeds and/or amounts.
  • a display may also be provided on the outside of the housing 7 to display the selected settings.
  • microprocessor control system allows the system to be expanded by the addition of various extra options, if necessary.
  • the power for the system may be provided by an internal power supply, a power adaptor for use with a mains power supply or even by the use of batteries fitted into the housing.
  • the system may also have an optionally enabled serial communication port for connecting with a computer for saving/restoring various design configurations and control functions.
  • an optionally enabled serial communication port for connecting with a computer for saving/restoring various design configurations and control functions.
  • the present system is particularly useful for relatively small, precise jobs, in particular for copying stained glass designs. In such designs, it is important to be able to control the flow of mixed resin or fluid to avoid resin being dispensed in places other than those required.
  • the width of the line of - 8 - resin dispensed onto the glass, etc. will not be uniform.
  • Another possibility is to provide a valve in the dispensing/mixing head which would close the dispensing/mixing head and, at the same time, decrease the dispensing tip volume to immediately stop dispensing.
  • This solution would, however, have the disadvantage of making the overall system bigger and heavier and the valve would require cleaning after using the system.
  • this problem is solved by controlling the motor to reverse a few turns at the end of the bead or line of resin to stop the flow of resin by pumping back.
  • the system may be primed again by pumping a few fast turns.
  • the separate fluids or components are pumped by the pumps from the respective containers 1 to the mixing/dispensing head 4, via separate tubes 3.
  • Each tube 3 is connected at one end to a respective pump 2, and at the other end to dispensing/mixing head.
  • the tubes are 2 metre long flexible tubes each of only 4 mm diameter.
  • the fluids are pumped along the length of the tube and are finally combined in the dispensing/mixing head 4.
  • the dispensing/mixing head 4 is a small hand-held unit incorporating a standard static mixer 5.
  • the mixer 5 is detachably attached to a connector part of the dispensing/mixing head 4 provided at the end of the tubes 3.
  • the mixer 5, which is a small plastic, inexpensive disposable component, can, therefore, be easily detached from the system and replaced. As the two components are kept separate throughout the rest of . the system, they do not cure other than in the static mixer, the system can easily be cleaned between - 9 - applications, and the static mixer can merely be replaced by a new mixer.
  • the static mixer is preferably in the form of a spiral mixer having a series of left-hand and right-hand helical elements which progressively divide and recombine the pumped fluids to provide a uniformly mixed output .
  • Such a mixer is capable of thoroughly mixing materials of very different viscosities without introducing any air. This eliminates the need for de- gassing allowing immediate dispensing and greatly improving material flow.
  • a purpose-designed mixer may be used.
  • Switches and/or sensors to start/stop the pump, regulate the pump speed, the amount of pumping back and/or the mixed liquid to be dispensed, may be provided on the mixing head connector part.
  • the mixing head may include valves to close off the unmixed liquid supply in such a way that the pressure inside the mixing chamber is released immediately.
  • the dispensing end of the static mixer may be formed as a dispensing tip.
  • the end of the mixer may be provided with a connector arrangement or luer lock fitting to allow dispensing tips or nozzles of various sizes to be attached.
  • a switch e.g. a small on/off button 12 may be provided near the dispensing tip. This allows the user to hold the mixer/dispensing tip arrangement by hand, like holding a pen, and to switch the motor on and off by pressing the button. Thus, the outline of the design etc., can be formed by pressing the button and "drawing" the pattern using the dispenser like a pen. This is a lot easier than squeezing bottles, as in the prior art, but is a lot less expensive than using a computerised plotter. The arrangement also provides a uniform, correctly mixed resin.
  • the dispensing head may be provided with a pressure - 10 - sensor (not shown) enabling a continuous adjustment of the pumping speed.
  • This arrangement is particularly useful for forming the outlines of stained glass type designs which simulate the lead of leaded windows.
  • the mixed fluid may be dispensed into cups or containers.
  • This arrangement may be used for forming the thinner, coloured resins used in stained glass design.
  • a mixed resin can be mixed with colour concentrates, using a pipette, in the cup or container, the mixed resins then may be used to fill outlines made with the above- described system.
  • the microprocessor can be programmed to flush the static mixer and dispensing tip before it becomes blocked by cured resin and the operator is not actually using the system but wants the system on standby.
  • the containers or reservoirs 1 for the different components may be of any readily available type.
  • the containers may be open at the top and filled up from tins containing the various components.
  • One problem with such containers is that the solvents from the components may evaporate producing unpleasant, or possibly even toxic fumes. Some resins can oxidise or react with vapours in the air and, when topping up the containers, air may become trapped in the resin, creating inconsistences in start and stop positions.
  • the preferred embodiment of the invention uses a novel type of container, specially developed for use with the present invention.
  • the containers are in the form of a plastic "bellows" type bottle.
  • the bottle is closed at one end and has a neck, with an opening, at the other end.
  • the - walls of the containers have a concertina or bellows form.
  • the neck part of the bottle is attached to the - 11 - top of the pump housing 7, such that fluid may flow from the container 1, through a hole in the top of the pump housing 7, through the pump.
  • Fig. 4 is an exploded view of the preferred "bellows" type container and its attachment to the pump housing 7.
  • a hole is provided in the top of the housing 7 which communicates with the input port of the pump 2.
  • a hollow shaft having an inner screw thread extends through the hole in the top of the housing 7 into the pump 2 and the end of the shaft protruding from the top of the housing is provided with a nut that abuts against the surface of the housing 7.
  • a sealing member in the form of a metal disk 13 having a shaft extending from each face is provided.
  • the disk 13 is dimensioned and shaped to fit in a sealing manner against the open neck of the container 1.
  • a communicating hole is provided in the middle of the disk 13.
  • a conduit shaft extends from this communicating hole from one face of the disk, such that, when assembled, the shaft extends into the interior of the container 1 and provides a conduit for passage of the fluid from that container.
  • the shaft extending from the other face of the disk 13 has an outer thread adapted to engage with the inner thread of the hollow shaft extending through the pump housing 7.
  • the neck of the container 1 is provided with an outer thread.
  • a retaining collar 14, provided with an inner thread matching the outer thread of the neck of the container 1, is provided to detachably attach the neck of the container to the top of the pump housing 7 by screwing, as shown.
  • This arrangement provides a secure mounting of the containers 1 onto the pump housing but allows them to be - 12 - easily removed and replaced.
  • the fluid As the fluid is pumped from the containers 1, they will be contracted or drawn down until they are empty, the height of the container being compressed according to the amount of fluid remaining in the container 1.
  • Partially used bottles can thus stay in place and, like the pumps and tubes to the dispensing head, these will not need cleaning or flushing with solvents as they are filled with only one component. Only the standard disposable mixer is filled with resin that will cure and needs to be replaced or cleaned.
  • a system according to the preferred embodiment of the invention using small pumps and relatively small bellows type containers can have a total size of around 250 x 180 x 100 mm, with two bottles on top. This clearly provides a very compact and portable system which is easy to use. Whilst the above description relates to a preferred, most simple embodiment of the present invention, a number of variations are also possible, within the scope of the invention.
  • the system may be used in combination with an XYZ plotter, wherein the movement of the dispensing head over the glass or other surface is controlled by a programmed plotter in accordance with a pre-programmed pattern.
  • the small, compact and light system of the present invention is particularly useful with XYZ tables, since most existing XYZ tables run on a stepper motor which - 13 - cannot start and stop quickly if the plotting head is too heavy. If the head is too heavy, the plotter will slow down but overshoot the planned stop position because of the inertia of the mass of the plotting head, thus creating inaccurate designs.
  • system may be used in combination with a plotter table normally used for vinyl cutting and routing but incorporating a dispensing tip as described above instead of a knife or router, to create a bead of viscous resin to form copies of stained glass, etc.
  • the system is essentially the same as described above, but in addition, an extra controlled pump system may be provided to keep the bellows-type containers always filled from larger containers which can be refilled while running the system.
  • the machine may be adapted to switch on and off and to control the speed.
  • the machine will be adapted to control the pump systems such that the pumps will run at a speed proportional to that of the plotter head.
  • the pump system can continuously adjust the pump speed to the movement speed of the dispenser tip, thus guaranteeing a constant bead width.
  • a further embodiment of the invention may allow one or more two-component resins to be mixed with one or more concentrated colours. This would make it unnecessary to clean the pump system or to use the second system for applying different colour outlines.
  • the pump system would then require containers and pumps for each component of the resin and for each concentrated colour. Again the pump may be controlled by an XYZ plotting machine.
  • the system may be used for mixing a two or three component resin and injecting this- between two or more sheets of glass and/or other material e.g. acrylic or polycarbonate material.
  • This - 14 - system can be used to produce laminated sheets by mixing the necessary components and colours using a static mixer and filling the cavity using a purpose built or standard tip.
  • the sheets are taped together on the edges with a double-sided tape of constant thickness, or sealed at the sides using spacers to separate the sheets.
  • the resin components will be provided in relatively large drums or bottles and, from these, will be tubed to a pump for each component. Pumps will then be tubed to the dispensing/mixing head with static mixer attached as attached above.
  • the dispensing tip is inserted into the double-sided tape so that the resin can be pumped into the space between the glass sheet.
  • the pump will preferably be controlled by a microprocessor and will have a display and keypad to enter glass sizes, etc. to calculate the amount of resin to be dispensed.
  • One of the sheets may be in the form of a mould so as to produce a 3D surface laminated onto the other sheet.
  • the pump When laminating, one of the components is a relatively aggressive acid. Therefore, the pump must be specially suited to such application.
  • the pump may be for example, a stainless steel internal gear pump or, perhaps a cylinder or syringe.
  • electronic circuitry and sensors may be provided to control mixing ratios, fill levels, pump speeds and directions, pumped quantities, valves etc. and also to keep a log of the system usage, if necessary.
  • This circuitry may also be used to provide an interface to other systems e.g. microcomputers and PCs, for continuous control and/or logging of the functions of the pump system and saving/adjusting configuration data.
  • the material used for the pumps may be selected according to the type of resin used.
  • the pumps may be made of, e.g., stainless steel, brass, plastic, ceramic - 15 - or other suitable material.
  • the pumps can be made from stainless steel and provided with Teflon ® seals, or, in certain circumstances, cylinder pumps or syringes may be used for such resins.
  • the present invention provides a dispensing pump which can produce a continuous flow of resin whilst preventing pre-mixing of the resin by keeping the components separate until they reach the actual dispensing head.
  • the system is small, compact and light, making it portable and suitable for hand-held use as well as for automatic XYZ plotter use.
  • the system can be precisely controlled allowing accurate and uniform pattern to be produced of different resin types .
  • the system works on relatively low pressure, there will be no resin bypass inside the pump and the pumps can be used to dispense precise amounts and mixed in precise ratios.
  • the precision of the dispensing system can be improved using a minimum of parts.
  • the present invention is particularly useful as a small, compact system it can be adapted for larger scale use and still provides advantages over existing systems in that it has fewer parts, requires almost no cleaning and can produce very accurate "shots" of resin by using the microprocessor to stop the pumps after the given amount of steps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating Apparatus (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Accessories For Mixers (AREA)

Abstract

L'invention porte sur un mélangeur/distributeur d'un fluide à deux composants comprenant deux réservoirs de fluide (1) ou plus contenant chacun un fluide, deux pompes (2) ou plus associées chacune à un réservoir, une tête mélangeuse (5), des moyens de commande des pompes en vue du transfert séparé des fluides à la tête mélangeuse, un moyen de mélange des fluides, et un moyen de distribution des fluides mélangés.
PCT/EP1999/002032 1998-03-25 1999-03-25 Melangeur/distributeur multicomposant WO1999048601A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU35992/99A AU3599299A (en) 1998-03-25 1999-03-25 Multi-component mixing and dispensing apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9806399.3A GB9806399D0 (en) 1998-03-25 1998-03-25 Multi-component mixing and dispensing apparatus
GB9806399.3 1998-03-25

Publications (1)

Publication Number Publication Date
WO1999048601A1 true WO1999048601A1 (fr) 1999-09-30

Family

ID=10829240

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/002032 WO1999048601A1 (fr) 1998-03-25 1999-03-25 Melangeur/distributeur multicomposant

Country Status (3)

Country Link
AU (1) AU3599299A (fr)
GB (2) GB9806399D0 (fr)
WO (1) WO1999048601A1 (fr)

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WO2013074364A1 (fr) * 2011-11-18 2013-05-23 Allergan, Inc. Système d'injection modulaire et procédé de dilution d'un fluide injectable
GB2502584A (en) * 2012-05-31 2013-12-04 Stratec Biomedical Ag Mixing pump
US8603028B2 (en) 2011-11-18 2013-12-10 Allergan, Inc. Injection device having an angled tip portion
US8801659B2 (en) 2008-05-30 2014-08-12 Allergan, Inc. Injection device for soft-tissue augmentation fillers, bioactive agents and other biocompatible materials in liquid or gel form
US8888751B2 (en) 2009-12-07 2014-11-18 Allergan, Inc. Slotted syringe
US8992481B2 (en) 2010-05-19 2015-03-31 Allergan, Inc. Modular injection device
US9095654B2 (en) 2012-08-14 2015-08-04 Allergan, Inc. Syringe for mixing and dispensing adipose tissue
CN107930511A (zh) * 2017-12-20 2018-04-20 安徽农业大学 一种自动配料和灌注装置
US10226585B2 (en) 2014-10-01 2019-03-12 Allergan, Inc. Devices for injection and dosing
US10232129B2 (en) 2008-12-02 2019-03-19 Allergan, Inc. Injection device
US10265477B2 (en) 2013-05-23 2019-04-23 Allergan, Inc. Mechanical syringe accessory
US10433928B2 (en) 2015-03-10 2019-10-08 Allergan Pharmaceuticals Holdings (Ireland) Unlimited Company Multiple needle injector
USD865950S1 (en) 2017-03-24 2019-11-05 Allergan, Inc. Syringe device
US10596321B2 (en) 2016-04-08 2020-03-24 Allergan, Inc. Aspiration and injection device
US10792427B2 (en) 2014-05-13 2020-10-06 Allergan, Inc. High force injection devices
CN112007581A (zh) * 2020-09-15 2020-12-01 米铁山 一种工业废水处理用中和液体混入装置
CN112171932A (zh) * 2020-09-10 2021-01-05 常州市晟茂塑料制品有限公司 一种用于制备色母粒的拌料机
US11684719B2 (en) 2013-05-23 2023-06-27 Allergan, Inc. Methods of treatment using a syringe extrusion accessory

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GB9905677D0 (en) * 1999-03-13 1999-05-05 Rsg Systems Ltd Pump
CN109303696B (zh) * 2018-11-23 2021-05-14 秦艳 一种临床麻醉辅助配药装置

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