EP2864755A1 - Härtemesseinrichtung sowie ein härtemessverfahren - Google Patents
Härtemesseinrichtung sowie ein härtemessverfahrenInfo
- Publication number
- EP2864755A1 EP2864755A1 EP14717415.5A EP14717415A EP2864755A1 EP 2864755 A1 EP2864755 A1 EP 2864755A1 EP 14717415 A EP14717415 A EP 14717415A EP 2864755 A1 EP2864755 A1 EP 2864755A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jaw
- specimen
- hardness
- test
- hardness measuring
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/15—Medicinal preparations ; Physical properties thereof, e.g. dissolubility
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0087—Resistance to crushing
Definitions
- the invention relates to a hardness measuring device for measuring a hardness of a test specimen comprising a break chamber in which a jaw is provided, which is arranged opposite a movable pressing jaw and a hardness measuring method.
- Hardness measuring devices serve to DUTs, such as round
- These facilities have a fixed unit (fixed jaw) and a mobile unit
- the force that must be used to break the specimen is defined as a hardness value and is measured by a load cell with strain gauges.
- This power box is located either in the press jaw or the jaw.
- the elongated samples (for example oblongs) must be aligned in a specific axis. This is done via various measures, such as by placing the specimen on a longitudinal groove or by two mutually rotating rods that bring the specimen in longitudinal position. If the test object can also be brought into the transverse position, an additional measurement of the width by the
- Hardness measuring device possible. By means of a stepping motor integrated in the hardness measuring device, the measurement can take place relative to a zero point on the fixed jaw.
- the positioning of the specimen in transverse position is done with a star or with a folding mechanism.
- Hardness measuring devices with which the width of a test object can be measured, but are complex and therefore prone to failure.
- Loading jaw at least immediately before the sample break then calculates the retroactive force on the sample and / or from the
- the object of the present invention is therefore to provide a
- Hardness measuring device for measuring a hardness of a test object
- a hardness measuring device comprising a
- Rotary axis rotatable flat surface is formed and wherein a test piece can be arranged on the ground, and by a hardness measurement method for measuring a hardness of a test specimen in this fractional chamber, solved.
- the invention thus relates to a hardness measuring device comprising a break chamber, in which a jaw is provided, which is arranged opposite a movable pressing jaw. At least one stop bar is provided, which is arranged substantially at a right angle to the jaw, wherein a bottom of the break chamber is formed by a part of a rotatable in both directions about a rotation plane surface, wherein on the bottom of the break chamber a test piece can be arranged is.
- the rotatable surface can be rotated via a drive, for example via a stepper motor, wherein the speed is preferably infinitely variable.
- the specimen can be positioned exactly on the flat surface, wherein by rotation of the flat surface and by
- the plane rotatable surface may be a plate or a disk. It is advantageous that such a plate or disc is easy to clean or replace.
- the rotatable surface may include an ejector with which the broken specimen can be removed from the rotatable surfaces. So that the surface is completely cleaned of the remains of the broken specimen, above the surface a cleaning element, such as a rotating brush or the like, can be arranged, with the remains of the specimen can be removed. This cleaning element is advantageously arranged outside the fracture chamber.
- the rotatable flat surface may be circular. If the surface is circular, preferably only a quarter of the circular area forms the bottom of the fracture chamber. But it is also conceivable to make the bottom of the fracture chamber larger or smaller. For this purpose, it is only necessary to widen the angle of the stop bar to the fixed jaw (cc> 90 °) or to reduce it (cc ⁇ 90 °).
- the hardness measuring device may also include a second stop bar opposite the first stop bar and also in the
- the pressing jaw between the two stop strips in the direction attached to the casserole movable By changing the angle of the two stop bars with respect to the jaw, the bottom of the cracking chamber can be made larger or smaller.
- the first stop bar and the second stop bar may be part of a transport device, with which the test piece is movable into the fracture chamber. It is advantageous in this case that this transport device already identifies stop strips, so that additional stop strips do not have to be arranged in the break chamber.
- This transport device may be a transport star or a linear transport device, such as a
- the flat surface becomes throughout
- Hardness measurement method turned so that the test specimen does not rotate away and thus also during the measurements is held in the desired position. This is done by means of a drive, with which the
- the invention further relates to a hardness measuring method for measuring a hardness of a test specimen, in particular a Oblongs, in a fracture chamber, wherein the fracture chamber has a jaw and a movable pressing jaw opposite thereto.
- the hardness measurement method comprises the following sequential steps: a) a test specimen is introduced into the fracture chamber, the test specimen being placed on the floor of the fracture chamber, the floor being formed by a portion of a flat surface rotatable in both directions about a rotation axis can be rotated in a first and a second direction, b) it rotates the rotatable surface at least as long in a second direction until the specimen rests with a longitudinal side of a stop bar, wherein the stop bar is arranged substantially at a right angle to the jaw, c) it is the pressing jaw in the direction of Fixed jaw moves, whereby the test object is also moved by the pressing jaw in the direction of the jaw until the test piece with its narrow side in contact with the jaw and d) it is performed the breaking test,
- the force required to break the specimen is determined by means of a load cell.
- This load cell can be arranged either in the press jaw or in the jaw.
- the width of the specimen can be determined, measuring the width between steps a) and b).
- the measurement of the width comprises the following successive steps: a1) the rotatable surface is turned into a first one at least as long
- the candidate by a above the Bodens arranged opening are introduced into the fracture chamber.
- the test specimen can be moved by means of a transport device in the fracture chamber.
- a transport device is advantageous that the specimen already between two stop bars of
- Transporting device is arranged, which are arranged substantially at a right angle to the jaw. Arranging additional
- the rotatable flat surface is cleaned of remnants of the broken specimen.
- the rotatable surface may have an ejection option with which the break is removed from the rotatable surface.
- a cleaning element such as a rotating brush or the like, may be placed above the surface to clean the surface.
- Cleaning element may be arranged outside the fracture chamber.
- the length of the test piece can be measured in addition, so that the test piece can be completely measured. This length measurement can take place either between steps a) and a1) or between steps c) and d).
- the rotatable surface is at least as long in the second direction
- test piece rests with its long side against the stop bar. 2. Subsequently, the test specimen is moved by means of the pressing jaw as long as in the direction of the jaw until the specimen is in contact with its narrow side with the jaw, and it is determined the length of the specimen.
- test specimen is always optimally positioned in the fracture chamber. This is especially important in the fracture test because the specimen may not turn away during the fracture test, otherwise the measurement will be falsified.
- Figure 1 a is a schematic representation of a detail of a first variant of a hardness measuring device
- Figure 1 b is a schematic representation of a detail of a second variant of a hardness measuring device
- Figure 1 c is a schematic representation of a detail of a third variant of a hardness measuring device
- Figure 2a is a section A-A through that shown in Figure 1 a
- FIG. 2b shows a further view of that shown in FIG. 2a
- FIG. 2c shows a further view of that shown in FIG. 2a
- Figures 3a to 3g a first variant of a hardness measurement method
- FIGS. 4a to 4g show a second variant of a hardness measuring method.
- FIG. 1 a shows a schematic representation of a section of a first variant of a hardness measuring device 1.
- This hardness measuring device 1 has a break chamber 2 into which a test object 3 is introduced.
- This specimen 3 is preferably a tablet, in particular an oblong tablet (oblong), as shown in FIG. 1 a.
- the break chamber 2 comprises a fixed jaw 4, opposite which a movable pressing jaw 5 is arranged.
- the pressing jaw 5 can be moved in the direction of the jaw 4 or moved away from it, which is indicated by the double arrow 6.
- a stop bar 7 is provided, which is arranged substantially at a right angle to the jaw 4. Also with respect to the pressing jaw 5, the stop bar 7 is arranged substantially at right angles.
- the hardness measuring device 1 further comprises a rotatable about a rotation axis 8 flat surface 9, wherein a part of this surface 9 forms a bottom 10 of the fracture chamber 2.
- the flat surface 9 can be rotated in a first and a second direction, which is indicated by the double arrow 1 1. Since the specimen 3 is disposed on this flat surface 9, the specimen 3 is also moved in the direction in which the flat surface 9 is moved. The specimen 3 can thus be accurately positioned on the flat surface 9, wherein by rotation of the flat surface 9 and by movement of the pressing jaw 5 of the specimen 3 can be brought into the fracture chamber 2 in any desired position.
- the flat surface 9 is thereby rotated by means of a drive about the axis of rotation 8, wherein the drive is arranged below the flat surface 9, so that the drive in Figure 1 a is not visible.
- Drive may be, for example, a stepper motor.
- Speed of the rotational movement of the surface 9 is preferably infinitely variable.
- the surface 9 is preferably polished. Since a flat surface 9 is provided, no groove is required in which the specimen must be placed in order to perform a compliant standard hardness measurement can.
- the hardness measurement on a test specimen can thus be carried out according to the European or the US Pharmacopoeia, according to which a flat surface must be provided on which the specimen must be arranged during the fracture test.
- the rotatable flat surface 9 is cleaned of remnants of the broken specimen 3.
- the rotatable surface 9 may have an ejection option (not shown) with which the break is removed from the rotatable surface 9.
- Ejection possibility may be attached to a surface 9
- Actuate flap that opens after the fracture test has been performed. So that the surface 9 is completely cleaned of residues of the broken specimen 3, above the surface a cleaning element (not shown), for example a rotating brush or the like, can be arranged, with which the surface 9 of residues of the specimen 3 is cleaned.
- the cleaning element is placed on the rotatable surface 9, while the flat surface 9 rotates further about its axis of rotation 8.
- Cleaning element may be arranged outside the fracture chamber 2. Further, it is possible to wash off the rotatable flat surface 9, for example, with water or other cleaning agent after a breakage test series has been performed.
- the flat surface 9 is a plate or a disc.
- the flat surface 9 is preferably circular. It is understood that the flat surface 9 may also have a different geometry in.
- the rotatable surface 9 may be formed as a square plate. However, this is not shown in this figure.
- FIG. 1 b shows a schematic illustration of a section of a second variant of a hardness measuring device 12 with a break chamber 13.
- a clamping jaw 14 is arranged, against which a movable pressing jaw 15 is attached.
- the pressing jaw 15 can be moved in the direction of the jaw 14 or moved away from this, which is indicated by the double arrow 16. Further, two
- Stop strips 17 and 18 are provided, which are arranged substantially at a right angle to the jaw 14.
- the hardness measuring device 12 has - as well as the hardness measuring device 1 - a rotatable about a rotation axis 19 flat surface 20, wherein a portion of this surface 20 forms a bottom 21 of the fracture chamber 13.
- the flat surface 20 can be rotated in a first and a second direction, which is indicated by the double arrow 27.
- this flat surface 20 may be formed as a circular plate or circular disc, as shown in Figure 1 b.
- the hardness measuring device 12 thus differs from the
- Hardness measuring device 1 only in that the hardness measuring device 12 has two stop strips 17, 18.
- FIG. 1 c shows a schematic illustration of a detail of a third variant of a hardness measuring device 22.
- This hardness measuring device 22 also has a breakage chamber 23, in which a clamping jaw 24 and a movable pressing jaw 25 are provided. Also, the pressing jaw 25 can in Direction of the jaw 24 or be moved away from this (see double arrow 26).
- the hardness measuring device 22 likewise comprises a flat surface 28 which can be rotated around a rotation axis 29 in a first and a second direction (cf. double-headed arrow 30). The surface 28 is
- a test specimen (not shown) inserted into the fracture chamber 23 can be easily and quickly positioned.
- the star wheel 31 has a plurality of star edges 32, 33, 34, wherein two star edges 33, 34 stop strips 33, 34 represent, between which the specimen in the fracture chamber 23 can be arranged and positioned.
- Stop strips 33, 34 are arranged substantially at a right angle to the jaw 24.
- the hardness measuring device 22 thus differs from the
- Hardness measuring device 12 characterized in that the two stop strips 33, 34 are part of a transport star 31. It is advantageous that the two stop strips 33, 34 are part of a transport star 31. It is advantageous that the two stop strips 33, 34 are part of a transport star 31.
- Transport star 31 already identifies stop strips, so that additional stop bars do not have to be arranged in the cracking chamber 23.
- a linear transport device for example a transport rake, can be provided, which introduces the test object into the rupture chamber.
- a linear transport device two stop bars would also be provided in the fracture chamber.
- Figure 2a is a section A-A through that shown in Figure 1 a
- Hardness measuring device 1 shown in the fracture chamber 2, a specimen 39 has been introduced, which is arranged with a narrow side, ie with an edge on the floor 10. However, a hardness measurement according to the European or the US Pharmacopoeia, the specimen 39 must lie with a long side on the bottom 10 of the fracture chamber 2. To overturn the specimen 39 can at the
- Stop bar 7 a projection or a nose 40 may be provided. If the flat surface 9 is moved about the axis of rotation 8 in the direction of the arrow 35, the specimen 39 is also transported in this direction. If the test object 39 now hits the projection or the nose 40 of the stop bar 7 (FIG. 2b), the test object 39 is overturned so that the test object 39 rests with its longitudinal side against the bottom 10 of the break chamber 2 (FIG. 2c). However, the attachment of such a nose or projection 40 is optional.
- test specimen 3 has already been introduced into the fracture chamber 2.
- the specimen 3 is with its long side on the bottom 10 of the fracture chamber 2 ( Figure 3a).
- Fractional chamber 2 Fractional chamber 2 has been introduced, the rotatable surface 9 is rotated so long around the axis of rotation 8 in a first direction (arrow 35) until the test specimen
- the pressing jaw 5 After measuring the length of the specimen 3, the pressing jaw 5 is moved back to the starting position (arrow 37) and the flat surface 9 in the second Direction (arrow 38) is rotated until the DUT 3 rests with its long side on the jaw 4 ( Figure 3d). The pressing jaw 5 is then returned to
- the force that is required to break the specimen 3 determined by means of a load cell.
- This load cell (not shown) can be arranged either in the press jaw 3 or in the jaw 4. About the determined width and the length of the specimen 3 can be determined whether the specimen 3 has the desired shape and size. After the breakage test has been carried out, the pressing jaw 5 is returned to the
- the hardness measurement without the measurement of the width can be carried out with the measurement of the length.
- the steps according to FIGS. 3c to 3e could be dispensed with.
- the pressing jaw 5 would go back shortly after the length measurement, in order subsequently to carry out the breaking test.
- FIGS. 4a to 4g show a second variant of a hardness measuring method.
- the flat surface 9 is moved in a first direction (arrow 38) until the specimen 3 with its one longitudinal side is arranged on the clamp 4.
- the pressing jaw 5 is brought to the test specimen 3 and the width of the specimen 3 is measured ( Figure 4c).
- the pressing jaw 5 is moved back to the starting position (arrow 37) and the direction of rotation of the surface 9 changed.
- the test piece 3 is moved in the direction of the arrow 35 until the test piece 3 rests with its longitudinal side on the stop bar 7 (FIG. 4d).
- the length of the test piece 3 is measured by the pressing jaw 5 leads the test piece 3 to the jaw 4 until the test piece 3 is clamped between the jaw 4 and the pressing jaw 5 ( Figure 4e).
- the measurement of the width and the length of the specimen 3 can be carried out by means of a sensor, not shown.
- the pressing jaw 5 is retracted (arrow 37) and shortly thereafter moved again in the direction of the clamping jaw 4 (FIG. 4f). In this case, the flat surface 9 is moved further in the direction of the arrow 35. As soon as the pressing jaw 5 has come into contact with the test piece 3, the breaking test is carried out (FIG. 4g). Subsequently, the
- Pressing jaw 5 is moved back by movement in the direction of arrow 37 back to the starting position and the broken specimen 3 is removed from the fracture chamber 2. It can then be another specimen in the
- Fraction chamber 2 are introduced, which is then measured.
- Movement direction according to arrow 35 can be referred to as both the second and as a first direction, depending on which direction the rotatable surface is moved for the first time in the process.
- the hardness measuring method would only comprise the following steps: a) in a first step, a test piece is placed in the fracture chamber, the test piece being placed on the bottom of the fracture chamber, the bottom being separated from one part in both directions by one
- the rotatable surface is rotated in a second direction at least until the device under test with a longitudinal side a stop bar is applied, wherein the stop bar is arranged substantially at a right angle to the jaw, c) in a third step, the pressing jaw is moved in the direction of the jaw, whereby the test object is also moved by the pressing jaw in the direction of the jaw until the DUT with a narrow side with the caking in contact, d) in a fourth step, the fracture test is performed, the
- the flat surface rotates about its axis of rotation during the entire hardness measurement process, since this ensures that the test object does not turn away but always remains in the desired position. In this way, exact measured values for the hardness of the test object can be obtained.
- the hardness measuring method comprises the following successive steps: a) a test piece is introduced into the breaker chamber, the test piece being placed on the bottom of the breaker box, the bottom being part of one in both Directions about a rotation axis rotatable level
- Area is formed, which can be rotated in a first and a second direction, a1) it is the rotatable surface at least as long in a first
- DUT is also moved in the direction of the jaw by the pressing jaw until the test piece with its narrow side is in contact with the jaw, d) finally the breaking test is carried out, the pressing jaw pressing the test piece against the jaw until the test piece breaks.
- the surface is rotated about its axis of rotation during the entire process, so that the specimens can not turn away.
- the hardness and the width of the specimens can be determined exactly.
- the length of the test object can additionally be measured, the measurement of the length taking place either between the steps a) and a1) or between the steps c) and d).
- the rotatable surface is at least as long in the second direction
- the specimen is moved by means of the pressing jaw as long as in the direction of the jaw until the specimen with its narrow side with the Fixed jaw is in contact, so that the length of the test piece can be measured.
- the flat surface rotates about its axis of rotation during the entire method so that it is ensured during the measurements that the test object does not rotate away but always stays in the desired position. In this way, exact values for the hardness, the width as well as the length of the test object to be measured can be obtained.
- stop bar Star edge 33 star edge, stop bar Star edge, stop bar arrow
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Pharmacology & Pharmacy (AREA)
- Molecular Biology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2014/055010 WO2015039767A1 (de) | 2014-03-13 | 2014-03-13 | Härtemesseinrichtung sowie ein härtemessverfahren |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2864755A1 true EP2864755A1 (de) | 2015-04-29 |
Family
ID=50486887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14717415.5A Ceased EP2864755A1 (de) | 2014-03-13 | 2014-03-13 | Härtemesseinrichtung sowie ein härtemessverfahren |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2864755A1 (de) |
WO (1) | WO2015039767A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2711912T3 (es) * | 2015-04-16 | 2019-05-08 | Thilo Kraemer | Dispositivo de ensayo para la ejecución de mediciones de dureza |
DE202015009582U1 (de) * | 2015-09-01 | 2018-05-29 | Erweka Gmbh | Vorrichtung zur Prüfung von Tabletten |
CN108020141A (zh) * | 2017-12-21 | 2018-05-11 | 无锡昌至盛机械制造有限公司 | 一种用于阶梯零件检测的装置 |
CN111595683A (zh) * | 2020-04-25 | 2020-08-28 | 南通科创建设工程检测有限公司 | 一种建筑材料成型检测器具 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3931884A (en) * | 1973-09-24 | 1976-01-13 | R. W. Hartnett Company | Apparatus for transporting and orienting capsules |
GB2013637A (en) * | 1977-11-24 | 1979-08-15 | Hermetite Products Ltd | Can Unscrambler |
US4236413A (en) * | 1978-03-21 | 1980-12-02 | Boehringer Ingelheim Gmbh | Testing apparatus for tablet-shaped specimens |
CH672844A5 (de) | 1984-03-21 | 1989-12-29 | Strausak Ag | |
GB8518305D0 (en) * | 1985-07-19 | 1985-08-29 | Microspan Process Controls | Testing apparatus |
US9038816B2 (en) * | 2010-12-09 | 2015-05-26 | Yuyama Mfg. Co., Ltd. | Medicine feeding device, and medicine counting device |
-
2014
- 2014-03-13 EP EP14717415.5A patent/EP2864755A1/de not_active Ceased
- 2014-03-13 WO PCT/EP2014/055010 patent/WO2015039767A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2015039767A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2015039767A1 (de) | 2015-03-26 |
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