WO2017029260A1 - Dispositif, système et procédé d'agitation/mélange de substance durcissable résineuse - Google Patents

Dispositif, système et procédé d'agitation/mélange de substance durcissable résineuse Download PDF

Info

Publication number
WO2017029260A1
WO2017029260A1 PCT/EP2016/069335 EP2016069335W WO2017029260A1 WO 2017029260 A1 WO2017029260 A1 WO 2017029260A1 EP 2016069335 W EP2016069335 W EP 2016069335W WO 2017029260 A1 WO2017029260 A1 WO 2017029260A1
Authority
WO
WIPO (PCT)
Prior art keywords
mixer
beaker
extension
engagement structure
engagement
Prior art date
Application number
PCT/EP2016/069335
Other languages
English (en)
Inventor
Thomas MATSCHOFSKY
Original Assignee
Struers ApS
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 Struers ApS filed Critical Struers ApS
Publication of WO2017029260A1 publication Critical patent/WO2017029260A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/053—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/211—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts characterised by the material of the shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/808—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers driven from the bottom of the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/88—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with a separate receptacle-stirrer unit that is adapted to be coupled to a drive mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0436—Operational information
    • B01F2215/0481—Numerical speed values

Definitions

  • the present invention relates to a device suitable in particular for stir- ring/mixing a hardenable substance, as well as to a method for stirring/mixing a resinous hardenable substance using, preferably, such a device.
  • specimens When analysing material specimens in the form of thin wafers such specimens are often provided with a peripheral structure formed from a mounting resin, which structure serves to facilitate the handling of the specimens, such as in a pretreatment step before optical or electron microscopy.
  • a peripheral structure formed from a mounting resin, which structure serves to facilitate the handling of the specimens, such as in a pretreatment step before optical or electron microscopy.
  • the specimen is often placed in a cup after which the mounting resin is poured into the cup to form, after curing, a ring-shaped structure extending around the specimen.
  • Epoxies have the lowest shrinkage of all cold mounting resins. The curing time is relatively long, but the adhesion to most materials is excellent. Epoxy resins polymerize through a chemical reaction after being mixed in the cor- rect proportions. Acrylics, on the other hand, are easy-to-use resins with short curing times and negligible shrinkage. They consist of self-polymerizing components which harden upon the addition of a catalyst.
  • a typical instruction to staff preparing the mounting resin is as follows:
  • the mixing beaker - which is normally of a plastics material - is typically discarded since any partial curing of the resin in the mixing beaker renders the latter useless for any subsequent uses.
  • the mixing is carried out by dipping a handheld mixer into the mixing beaker; however, this procedure involves the risk of air being sucked into the mixture from above the surface by a vortex-effect, which may occur when the handheld mixer is operated at a too high speed or held such that the mixer part of the handheld mixer is too close to the surface of the mixture.
  • the present inventor has found that the number of air bubbles in the mixture may be reduced significantly by maintaining the mixer part at the bottom of the mixing beaker, and preferably also by operating the mixer part at a relatively high speed, preferably - however - not exceeding 500 rpm, whereby mixing time can be reduced to about 30 seconds.
  • the inventor has also de- veloped a device and a system as claimed herein which may be manufactured at a low cost, taking into account that the device is to be discarded after use.
  • the device for preparing the aforementioned mixture is formed from two parts, namely a beaker part for containing the mixture and a mixer part, which parts are assembled in such a manner that the mixer part is located at the bottom of the beaker part and may be rotated relative to the beaker part through the engagement of an extension of the mixer part that extends to the outside of the beaker part with an external drive, such as a rotating shaft with a connector configured to couple with the aforementioned extension.
  • the inventive device comprises a beaker part with a central axis, for containing said substance to be mixed, and a mixer part rotatably mounted and arranged inside the beaker part, the beaker part having a bottom and an upstanding peripheral wall, the bottom having a through-going passage along the central axis, this passage receiving an extension of the mixer part.
  • the beaker part has an engagement structure which may be complementary with a first engagement structure of the extension, whereby a fluid tight engagement allows the mixer part together with the extension to rotate relative to the beaker part while restricting or - preferably - preventing removal of the mixer part from the beaker part, the extension including a second engagement structure configured for the aforementioned coupling with an external drive for bringing about the rotation.
  • the mixer part moreover preferably includes a base having plastic material mixer blades extending in opposite directions away from the central axis.
  • the mixer part may be manufactured as an integral element, including the aforementioned extension, in a plastic injection moulding procedure using a mould with side pull parts that are moved perpendicularly to the lengthwise direction of the extension.
  • the mixer part is then, using the engagement structures of the mixer part and the beaker part, respectively, snapped or pressed in place at the bottom of the mixer part, which step may be carried out either at the factory or by the end user.
  • the mixer part may be a composite structure of different materials, with engagement structures thereof cooperating with the beaker part being of a relatively more resilient material, such as of a rubber material BRIEF DESCRIPTION OF THE DRAWINGS
  • FIGs. 1 a and 1 b are cross-sectional and top views showing a device D of the invention
  • Figs. 2 and 3a-3b are perspective, cross-sectional and top views, respectively, of the beaker part of the device D of figs. 1 a and 1 b,
  • Fig. 4 is a perspective view of the mixer part of the device D of figs. 1 a and 1 b,
  • Fig. 5 is a perspective view of another mixer part for another embodiment of the device of the invention.
  • Fig. 6 is a side view of the mixer part of fig. 5,
  • Fig. 7 is a side view of the mixer part of fig. 5,
  • Fig. 8 is a top view of the mixer part of fig. 5
  • Fig. 9 is a perspective view of yet another embodiment of the mixer part of the invention
  • Fig. 10 is a view similar to fig. 3a, showing the beaker part for the mixer part of fig. 9, and
  • Fig. 1 1 is a view similar to fig. 1 a, with the mixer part of fig. 9.
  • the present device D for preparing the aforementioned mixture is formed from two parts 10, 30 shown in the cross-sectional and top views of fig. 1 a and 1 b, respectively, namely a beaker part 10 for containing the mixture and a mixer part 30, which two parts 10, 30 are assembled in such a manner that the mixer part 30 located at the bottom 2 of the beaker part 10 may be rotat- ed relative to the beaker part 10.
  • Imparting this rotation is through the engagement of an extension 35 of the mixer part 30 that extends to the outside of the beaker part 10 with an external drive (not shown), such as a rotating shaft having a connector or surface configuration configured to connect or mate with the aforementioned extension 35, which external drive preferably is part of a structure or tool with portions for supporting the beaker part 10 and for holding the latter against rotation.
  • an external drive such as a rotating shaft having a connector or surface configuration configured to connect or mate with the aforementioned extension 35, which external drive preferably is part of a structure or tool with portions for supporting the beaker part 10 and for holding the latter against rotation.
  • Fig. 3a shows by letter X a central axis of the device D/beaker part 10, which central axis X extends centrally through a through-going opening or passage 3 formed in the bottom 2 of the beaker part 10 and configured to receive the extension 35 of the mixer part 30; assembly of the two parts 10, 30 is by inserting the mixer part 30 through the upper open end (at the spout 10') of the beaker part 10 and passing the extension 35 into the passage 3 for engagement with the beaker part 10, such as by means of complementary engagement structures to be discussed below.
  • the aforementioned mixer part 30 is shown in greater details in fig. 4 and generally includes mixer blades 40, 40' arranged to extend in opposite directions away from the aforementioned central axis X when mounted inside the beaker part 10.
  • the mixer blades 40, 40' and the extension 35 are preferably integrally moulded, with ring-shaped protrusions 101 , 102 formed on the extension 35 exhibiting a certain resiliency (as a rubber-like material).
  • a lower protrusion 101 thereof may preferably have a resiliency allowing for it to deflect or be deformed as the extension 35 is inserted into the passage 3 and to then reassume its outward orientation shown in fig.
  • the extension 35 has a coupling portion 37, also referred to in the claims as a "second engagement structure", preferably with a polygonal, such as a hexagonal or octagonal, contour and adapted to be matingly received by a shaft of the aforementioned external drive, for engagement therewith for rotating the mixer part 30 about axis X relative to the beaker part 10.
  • the extension may have a hollow at its end, defined by a polygonal wall, for matingly receiving a shaft of the external drive.
  • Fig. 3a shows by numeral 5 the inside bottom face of the beaker part 10, as well as a curved transitional area 7 between the wall 8 and the bottom face 5.
  • Numeral 9 marks a peripheral bottom face of the beaker part 10, by which the device D may be placed on a flat surface.
  • the extension 35 of the mixer part 30 preferably does not extend beyond this face 9 such that the device D may be placed on a table.
  • the mixer part 30 in another embodiment is shown in figs. 5-8 and includes a base 38 having plastic material mixer blades 40, 40' arranged to extend in opposite directions away from the aforementioned central axis X (identified in fig. 7) when mounted inside the beaker part 10.
  • the mixer part 30 and the extension 35, shown here as a tubular structure, are preferably integrally moulded from a plastic material, without including any metal material compo- nent parts since no cutting effect is required.
  • the blades 40, 40' are designed to extend in their entirety perpendicularly away from the central axis X, with no raised portions thereof projecting along the axis X, so as to allow removal of the moulded mixer part 30 from a mould by moving side pull mould parts in opposite directions perpendicularly to the extension 35, along faces 45, 45' of the blades 40, 40'.
  • the blades 40, 40' generally preferably have faces 45, 45' that are flat and oriented to extend at an angle (a), preferably in the order of 20°-35°, to a plane (P) perpendicular to the central axis X; the faces 45, 45' may alternatively be curved in cross- section.
  • connection between the mixer part 30 and the beaker part 10 is preferably fluid tight, and is in this embodiment provided in that an engagement structure of the bottom 2 is configured for engaging a first engagement structure of the extension 35 of the mixer part 30, this first engagement structure comprising an O-ring (not shown) acting as a locking ring and received in an annular recess 32.
  • the engagement of the engagement structure at the bottom 2 with the first engagement structure (annular reccess 32/O-ring) of the mixer part 30 may be permanent after assembly of the beaker part 10 with the mixer part 30.
  • the beaker part 10 of figs. 2 and 3a-3b when used with the embodiment of the mixer part 30 shown in figs.
  • the engagement structure of the bottom 2 may be formed as a roundgoing recess (not shown) formed near position 4 shown in fig. 3a inside the passage 3, which recess receives the aforementioned O-ring acting as a locking ring and as a sealing gasket, and which in turn is received by the annular recess 32 in the extension 35.
  • Resiliency of the materials/structures preferably allow for the mixer part 30 to connect with the beaker part 10 via the locking ring.
  • 9-1 1 show an alternative embodiment wherein the extension 35 of the mixer part 30 has flexible legs 35' carrying at the end thereof ribs 32 defining the aforementioned first engagement structure and configured to lock the mixer part 30 to the beaker part 10 by snapping in place against the lower face LF of the bottom 2, as seen in fig. 1 1 .
  • the mixer part 30 On activation of the external drive the mixer part 30 is brought into rotation, preferably at speeds below 500 rpm, for about 30 seconds. By the mixer part 30 liquid in the beaker part 10 is mixed from the bottom, limiting air drawn into the mixture from the surface.
  • the material for the device D is preferably PA (poly- amide) or other acid resistant plastic material.
  • the plastic mixer part 30 is moulded with no components of any other material, i.e. it is 100% of plastic material. After a mixing operation the beaker part 10 and the mixer part 30 are preferably discarded, i.e. they are preferably formed to be for single-use.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

L'invention concerne une partie de bécher (1) avec un axe central (X), pour contenir ladite substance, et une partie de mélangeur (30) montée de façon rotative et disposée à l'intérieur de ladite partie de bécher (1), la partie de bécher (1) ayant un fond (2) et une paroi périphérique verticale (8), le fond (2) ayant un passage traversant (3) le long dudit axe central (X), le passage (3) recevant une extension (35) de ladite partie de mélangeur (30), le fond (2) ayant une structure de prise (4) complémentaire avec une première structure de prise (32) de ladite extension (35), la prise de la structure de prise (4) du fond (2) avec la première structure de prise (32) permettant à la partie de mélangeur (30) conjointement avec l'extension (35) de tourner par rapport à la partie de bécher (1) tout en empêchant ou limitant le retrait de la partie de mélangeur (30) à partir de ladite partie de bécher (1), l'extension (35) comprenant une seconde structure de prise (37) conçue pour s'accoupler à un entraînement externe pour ladite rotation, et la partie de mélangeur (30) comprenant une base (38) ayant des lames de mélangeur en matière plastique (40, 40') s'étendant dans des directions opposées s'éloignant dudit axe central (X).
PCT/EP2016/069335 2015-08-17 2016-08-15 Dispositif, système et procédé d'agitation/mélange de substance durcissable résineuse WO2017029260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201570530 2015-08-17
DKPA201570530 2015-08-17

Publications (1)

Publication Number Publication Date
WO2017029260A1 true WO2017029260A1 (fr) 2017-02-23

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Application Number Title Priority Date Filing Date
PCT/EP2016/069335 WO2017029260A1 (fr) 2015-08-17 2016-08-15 Dispositif, système et procédé d'agitation/mélange de substance durcissable résineuse

Country Status (1)

Country Link
WO (1) WO2017029260A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08112521A (ja) * 1994-10-18 1996-05-07 Shiseido Co Ltd 粉末用攪拌混合装置
WO2010108444A1 (fr) * 2009-03-27 2010-09-30 Shun Pui Andrew Chiu Ensemble d'essai de taille réduite pour pot de peinture
EP2889080A2 (fr) * 2013-12-03 2015-07-01 Pall Corporation Agitateur mécanique avec ensemble de boîtier de joint

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08112521A (ja) * 1994-10-18 1996-05-07 Shiseido Co Ltd 粉末用攪拌混合装置
WO2010108444A1 (fr) * 2009-03-27 2010-09-30 Shun Pui Andrew Chiu Ensemble d'essai de taille réduite pour pot de peinture
EP2889080A2 (fr) * 2013-12-03 2015-07-01 Pall Corporation Agitateur mécanique avec ensemble de boîtier de joint

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