JPH0654290B2 - Powder adhesion measuring method and powder adhesion measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a powder is compressed to form a test piece, and the test piece is pulled to produce a fracture surface. The present invention relates to an improvement of a powder adhesion measuring method and a powder adhesion measuring device for measuring the binding force of powder.

When granulating and molding the powder into pellets or granules, a binder is added to the powder to generate a binding force between the solid particles. In this case, the binder to be added is selected to be suitable for each product to be granulated / molded, and
The amount added is set so as to suit the properties of the product. From this, it becomes essential to measure what characteristics the binder-added powder is adjusted to. For this purpose, the powder prepared by adding a binder is filled into a divided cell for tensile test and compressed to form a test piece in which the outer peripheral surface adheres to the inner wall surface of the divided cell. Then, by pulling the divided cells with the divided surface as a boundary, a test for measuring the tensile force until a fracture surface is generated in the compressed / molded test piece is performed.

By the way, the powder adhesion measuring device used in this manner is formed separately as a conventional device so as to be separated vertically from the dividing surface 10 as shown in FIG. A cylindrical divided cell 1 in which an upper half portion 1a and a lower half portion 1b are joined to each other so as to be detachable from each other, a combination, a mounting table 2 on which this is mounted, and a partition mounted on the mounting table 2. A compression device A including a compression bar 3 that moves up and down with respect to the cell 1, and a set table 4 for holding the lower end side of the divided cell 1 and setting it on the table surface as shown in FIG. And a tensioning device B consisting of a clamp 5 which holds the upper end side of the divided cell 1 fixedly set on the setting table 4 and is operated to move up and down.

Then, in the powder tensile test, the powder to be inspected is filled in the inner cavities of the divided cells 1 set on the mounting table 2 of the compression device A, and the compression bar 3 is activated by the operation of the compression device A. Of the pressure sensor S1 attached to the compression bar 3
The test piece P is compressed until the pressure detected by the pressure reaches a predetermined pressure, whereby a rod-shaped test piece P whose outer peripheral surface is in close contact with the inner wall surface of the divided cell 1 is formed in the divided cell 1. , The divided cell 1 is removed from the mounting table 2, transferred to the upper surface of the setting table 4 of the tension device B, and set, and the clamp 5 of the tension device B is attached to the upper end side of the divided cell 1, and the clamp 5 Is increased by this
The tensile pressure until a fracture surface is generated on the test piece P is measured.

By the way, in the powder adhesion measurement test performed in this manner, the fracture surface generated in the molded test piece P must be
The test piece P, which has been tested once, is applied to the tension device B even if the test piece P is tested once because it occurs at a constant position continuous to the division surface 10 of the division cell 1. Then, the test piece P can tear from the fracture surface generated in the previous test, and by making the measured value inaccurate, one test piece P can perform only one test. From this, in order to collect a large number of data so that the measured value of the adjusted powder is accurate, after the test for one test piece P is completed, the divided cell 1 The powder is removed from the container, the powder is filled again, the powder is set in the compression device A, and a new test piece P is molded by compression.
It is necessary to repeat the work of applying this to the tension device B,
There is a problem that the work for forming the test piece P is troublesome.

The present invention has been made in order to solve this problem occurring in the conventional means, and is a powder test piece P that is filled in the divided cells 1 and compression-molded by the compression device A.
After performing a tensile test on the divided cell 1 together with the tension device B, the test piece P, which has undergone the tensile test, is compression-molded by the compression device A again in the divided cell 1 and the tensile test is performed again. At the same time, it is an object of the present invention to provide a new means by which a correct value based on the characteristics of the powder can be measured so that a tensile test with this test piece can be performed efficiently.

Further, in the present invention, as means for achieving this object, the powder is divided into a cylindrical shape which is divided into an upper half part and a lower half part from a dividing surface provided at an upper and lower intermediate position of the body part. Filled in the cell, molded by a compression device into a test piece in which the body circumference is in close contact with the inner peripheral surface of the divided cell, and this test piece is subjected to a tensile test by applying a tensioning device together with the divided cell, A test piece is raised by a predetermined stroke with respect to the divided cells by a push-up device, compressed again by a compression device, and a tensile test is performed again on a tension device. ,
As an apparatus for carrying out this method, a cylindrical divided cell which is divided into an upper half portion and a lower half portion by dividing surfaces provided at upper and lower intermediate positions of the body portion, and a mounting cell on which the divided cell is placed. The mounting table includes a mounting table, a compression device disposed above the mounting table, and a push-up device disposed below the mounting table, and the mounting table includes a divided cell mounted on the upper surface thereof. A powder adhesion measuring device characterized in that a through hole is formed in a portion of the bottom surface corresponding to the opening to allow a push-up rod that moves up and down of the push-up device to penetrate therethrough and project into the inner cavity of the divided cell. Is to be raised.

Next, embodiments will be described in detail with reference to the drawings. The same reference numerals are used for the constituent members having the same effects as those of the conventional means.

FIG. 3 is a schematic perspective view of the whole of the powder adhesion measuring device according to the present invention before the divided cells 1 are set, and FIG. In the figure, a is a machine body, b is a base board mounted on the machine body a, c is a support machine frame erected on the base board b, d is a mounting table for supporting the divided cells 1, and e is A lateral movement device for moving the mounting table d to the left and right, A is a compression device including a compression bar 3 that moves up and down and an elevating mechanism 6 that moves it up and down, and B is a clamp 5 that holds the upper end of the divided cell 1 and the clamp 5. A pulling device including a lifting mechanism 7 for lifting, C is a push-up device provided below the mounting table d.

By mounting the lower end side of the divided cell 1 on the upper surface of the mounting table d, the divided cell 1 is positioned so that the divided cell 1 occupies a predetermined position, and a fitting portion 80 for retaining the fixed position at that position is provided. A through hole 81 having a diameter into which the push-up rod 90 of the push-up device C is fitted is formed vertically through the center portion of the fitting portion 80.

The mounting table d is supported by guide members 82, which are provided on the upper surface of the platform b of the machine body a so as to freely slide in the left and right directions. The device of this embodiment is an example in which the compression device A and the tension device B are mounted in parallel on one machine body a, and when the compression device A and the tension device B are separately configured, The mounting table d is a fixed mounting table that is combined with the compression device A in the same manner as the mounting table 2 of the compression device A in the conventional means. In that case, the above-mentioned guide members 82, 82 for slidably supporting the mounting table d in the left-right direction are omitted, and the lateral moving device e for laterally moving the mounting table d is also omitted. Will be the one. However, even when the fixed mounting table d is used as described above, the fitting portion 80 for positioning the divided cell 1 and the push-up rod 90 of the push-up device C are vertically penetrated for fitting. The through hole 81 is equipped.

The lateral movement device e is for laterally moving the mounting table d along the guide member 82, is arranged on the base b in parallel with the guide member 82, and is axially supported by the shaft support members 83. The screw rod 84 is passed through the female screw portion provided on the mounting table d, and the screw rod 84 is transmitted to the output shaft of the motor M provided on the base b, so that the motor M1 can be rotated in the desired amount in the reverse direction. By rotating, the mounting table d is configured to move to the left or right along the guide member 82 by a desired amount.

As shown in FIG. 6, the lateral moving device e is provided with a motor M below the guide member 82 for guiding the mounting table d.
A chain belt 85 that is endlessly rotated in the left-right direction by driving 1 is stretched, and this chain belt 85 is connected to a mounting table d, and the motor M1 is driven in the forward and reverse directions to move the chain belt 85 in order. On the contrary, there is a case in which the mounting table d may be configured to be moved by a desired movement amount in the left-right direction by rotating the mounting table d, which may be configured appropriately.

The compression device A is a normal device including a compression bar 3 that moves up and down and an elevating mechanism 6 that moves the compression bar 3 up and down. The compression bar 3 is a pair of right and left provided on the front side of the support frame c. A sliding member 31 is supported on the guide members 30 in the up-and-down direction so as to freely slide up and down, and on the lower surface side thereof,
The lower end side of the compression bar 3 is supported so as to project downward, and the support is a support via a pressure sensor S1 (load sensor) so that the pressure applied to the compression bar 3 can be detected. And around the compression bar 3,
When the compression bar 3 compresses the powder filled in the inside of the divided cell 1, the ring-shaped pressing member 32 for pressing the divided cell 1 from above and pressing it against the mounting table d is arranged. An annular mounting member 34, which is supported by a stay 33 hanging from the lower surface of the sliding member 31, is supported via a spring 35 so as to be able to move up and down.

The elevating mechanism 6 arranges a screw rod 60 parallel to the upper and lower guide members 30, 30 on the front surface of the support machine frame c, and rotatably supports a stay 61 provided on the support machine frame c. The female screw 62 is threadedly engaged with the female screw 62 and the lower end side of the screw rod 60 is integrally connected to the upper surface of the central portion of the sliding member 31 described above. 63 is integrally fixed and attached, and the transmission pulley 63 is conducted via the conduction belt 64 to the output shaft of the motor M2 mounted on the rear surface side of the supporting machine frame c, and the motor M
By rotating 2 in the forward or reverse direction, the female screw 62
On the contrary, the compression bar 3 is moved up and down by rotating the screw rod 60 up and down together with the sliding member 31.

The compression device A thus configured has a mounting table d that is moved laterally by the lateral movement device e described above when the mounting table d is located on the right end side in FIGS. 3 and 4.
It is arranged so as to be located above.

The tension device B is composed of a clamp 5 that holds the upper end side of the divided cell 1 and an elevating mechanism 7 that elevates and lowers it.
As shown in FIG. 4, the clamp 5 of the clamp 5 has an engaging flange portion 11 provided on the upper end side of the divided cell 1 in a side view.
Is formed in the shape of a dovetail that fits with each other, and is arranged on the front side of the support machine frame c above the mounting table d in a state where the guide members 82 are moved to the left end side by the lateral movement device e. Then, this is suspended and supported by a sliding member 51 which is slidably supported by a vertical guide member 50 provided on a supporting machine frame via springs 52 and 52.

Further, the elevating mechanism 7 of the pulling device B has the above-mentioned supporting machine frame c.
The screw rod 60 of the lifting mechanism 6 of the compression device A is provided on the rear surface side.
The screw rod 70 formed in the same manner as above is arranged in the vertical direction,
A female screw 72 rotatably supported by stays 71 provided on the support frame c is threadedly penetrated, and the lower end of the screw rod 70 is integrally connected to the upper surface of the sliding member 51. A conductive pulley 73 is integrally or integrally provided on the outer periphery of the above-mentioned female screw 72, and the conductive pulley 73 is connected to the conductive belt 7.
By transmitting to the output shaft of the motor M3 mounted on the rear surface side of the supporting machine frame c via 4, the motor M3 is rotated in the forward and reverse directions, the female screw 72 is rotated, and the screw rod 70 is moved up and down. The sliding member 51 and the clamp 5
Is designed to move up and down (Fig. 6).

Then, the tensile pressure is detected by a laser type displacement detecting the amount of upward displacement of the upper half 1a of the divided cell 1 which emits a laser beam L and is supported by the clamp 5 above the sliding member 51 that moves up and down. A total of S2 is provided so that the detection can be performed. This laser displacement meter S2 is the sixth
As in the embodiment shown in the drawing, a pressure sensor S3 for detecting a load in the pulling direction is provided on the lower surface side of the sliding member 51, a suspension rod 53 is connected thereto, and the spring 52 is attached to the suspension rod 53.
There are cases where the clamp 5 is hung via 52 and the pulling pressure is detected by the pressure sensor S3.

Further, as shown in FIG. 5, the divided cell 1 has an upper half portion 1a and a lower half portion 1b which are divided into upper and lower parts from a dividing surface 10 provided at an upper and lower intermediate portion of the body. Although formed separately, the lower half 1b is made of heavy stainless steel, and the upper half 1a is made of a light synthetic resin material. Then, on the upper end side of the upper half portion 1a thereof, an engaging flange portion 11 which is fitted into the above-mentioned clamp 5 is formed.
Is formed on the inner peripheral surface of the lower half 1b, and the upper half 1a
An inner cylinder 12 formed of a synthetic resin material that forms the is fitted. Further, a bottom lid 13 is provided at the bottom of the inner cavity of the lower half portion 1b.
It is vertically slidably dropped and locked to a step portion 14 provided at the bottom of the lower half portion 1b, and after the powder is filled, a drop lid 15 is placed on the upper surface of the powder. It is designed to be slidably inserted.

As shown in FIG. 10, the push-up device C moves from the bottom surface of the divided cell 1 mounted on the mounting table d to the inner cavity thereof through the through hole 81 formed in the mounting table d. The push-up rod 90 to be fitted, the elevating mechanism 91 for raising and lowering the push-up rod 90, and the motor M for driving the elevating mechanism 91.
4 includes a screw rod 910 which is vertically movably supported on a machine casing 92 in which a motor M4 is assembled, and bearing support members 93, 93 provided in the machine casing 92.
A female screw 911 rotatably rotatably supported on the outer periphery of the screw rod 90, and a transmission pulley provided on the outer periphery of the female screw 911 is transmitted to the output shaft of the motor M to rotate the female screw 911. It is in the form of an ordinary screw jack configured with a transmission belt 912, and by rotating the motor M4 in the normal direction or in the reverse direction to rotate the female screw in the forward or reverse direction, the screw rod 910 moves up and down, and The push-up rod 90 provided on the upper end side is moved up and down.

Then, in the push-up device C, the operation of the lateral movement device e causes the mounting table d to reach the end of the lateral movement stroke to the right (right in FIGS. 3 and 4), and the compression device In a state in which it occupies a predetermined position below A, it is arranged so as to be positioned below the mounting table d and supported on the machine body a, whereby the motor M4 is actuated to push up the pushing rod as described above. When the 90 is raised, the push-up rod 90 is fitted into the inner cavity of the divided cell 1 mounted on the mounting table d through the through hole 81 formed in the mounting table d. There is. When the mounting table d is fixed and mounted on the machine body a, the push-up device C is naturally disposed below the mounting table d. It may be assembled and supported integrally on the side. In addition, when the mounting table d is integrally assembled to the lower surface side of the mounting table d, the mounting table d is moved together with the guide member 82 when it is movably supported in the lateral direction. You can

The embodiment apparatus configured as described above operates as follows.

To measure the adhesive force of the adjusted powder, a predetermined amount of the powder is filled into the inner cavity of the divided cell 1 in which the upper half 1a is superposed on the lower half 1b and assembled. . And
The divided cell 1 in this state is fitted into the fitting portion 80 provided on the upper surface of the mounting table d.

Thereby, the divided cell 1 is held on the upper surface of the mounting table d by the weight of the lower half portion 1b thereof.

At this time, the mounting table d is operated by operating the switch SW1 provided on the control panel on the front of the machine body a,
It is located at the stroke end on the right side of the moving range of the lateral moving device e due to the control operation of the control device incorporated in. That is, it is in the position shown in the state of FIG.

Next, from this state, the compression device A provided on the machine body a
The switch SW2 for starting is operated. This allows
The motor M1 rotates normally, the elevating mechanism 6 operates downward, and the compression bar 3 compresses the powder as shown in FIG. As a result, when the pressure sensor S1 detects a predetermined pressure, the rotation of the motor M1 is stopped, and then the motor M1 is rotated in the reverse direction to raise and lower the lifting mechanism 6, returning to the state of FIG. A test piece pressed into a predetermined compression density is molded in the cell 1.

Next, when this state is reached, the lateral movement device e is operated to move the mounting table d supporting the divided cell 1 to the left. The operation of the lateral movement device e may be automatically performed in association with the control operation of the motor M1 by the pressure sensor S1. By the lateral movement of the mounting table d, the divided cell 1 containing the molded test piece P of powder moves toward the clamp 5 of the tension device B. Since the clamp 5 is formed in the shape of a dovetail groove that fits into the engagement flange portion 11 on the upper end side of the divided cell 1, when the lateral movement device e completes the lateral movement operation to the left. , The state is automatically engaged with the clamp 5 of the tension device B (Fig. 8).

Next, when the operation of the lateral movement device e is completed, the switch SW3 for operating the tension device B is operated. The operation of the pulling device B may be controlled so as to be automatically performed in association with the control of the operation of the lateral movement device e.

As a result, the pulling device B is moved up and down as shown in FIG.
The clamp 5 pulls up the upper half 1a of the divided cell 1 by the ascending operation of the divided cell 1 and the test piece P adhered to the inner peripheral surface of the divided cell 1 adheres to the upper half 1a of the divided cell 1. Upper half of the test piece P and the lower half 1 of the divided cell 1
The lower half side of the test piece P adhering to b is torn up and down to cause breakage, and the tensile pressure at this time is
The measurement is performed by detecting the movement of the upper half 1a of the divided cell 1 by the laser displacement meter S2 or by detecting the load by the pressure sensor S3.

Next, when the measurement of the tension pressure is completed, the elevating mechanism 7 of the tension device B is lowered to return to the state of FIG.
The lateral movement device e is operated in the opposite direction to return to the state shown in FIG.

Next, from this state, the compression device A is operated again. As a result, the fracture surfaces of the powder test pieces P, which have undergone the tensile test in the divided cells 1, are brought into contact with each other to be in the state of FIG.

Next, from this state, the push-up device C is operated by operating the switch SW4. Then, the rising push-up rod 90 moves to the first
As shown in FIG. 1, the lower surface of the bottom lid 13 of the divided cell 1 on the mounting table d is brought into contact with and pushed up as shown in FIG. At this time, the compression device A raises the lifting mechanism 6 within a range in which the holding member 32 retains the action of holding the divided cell 1 by the spring pressure of the spring 35.

As a result, the test piece P in the divided cell 1 is
As shown in the figure, it is pushed up against the divided cell 1 and comes to face a new portion of the body peripheral surface of the test piece P with respect to the divided surface 10 of the divided cell 1. Then, in this state, the push-up device C is fixed, the compression device A is caused to perform compression operation until the pressure detected by the pressure sensor S1 reaches a predetermined value, and again the tension device as shown in FIG. 8 and FIG. If the tensile test is performed over B, the test piece P will be
The new fracture surface at the position facing the dividing surface 10 is broken, and the tensile pressure at this time is detected.

At this time, the stroke 1 for pushing up the test piece P by the push-up device C is a length l'from the upper end surface of the test piece P to the position facing the dividing surface 10 in the first tensile test.
If the setting is made to correspond to, the second tensile test can be performed under the same conditions as the first tensile test. Therefore, each time the tensile test is finished, the test piece P in the divided cell 1 is pushed up by the push-up device C against the divided cell 1 by a predetermined stroke,
It becomes possible to repeat the tensile test a plurality of times with one test piece P.

As described above, according to the method of the present invention, in the cylindrical divided cell 1 in which the powder is separated into the upper half 1a and the lower half 1b from the dividing surface 10 provided at the upper and lower intermediate positions of the body. The test piece P is filled into the test piece P and is compressed by the compression device A to form a test piece P in which the body peripheral surface is in close contact with the inner peripheral surface of the divided cell 1.
After performing a tensile test on the divided cell 1 together with the tension device B, the push-up device C raises the test piece P with respect to the divided cell 1 by a predetermined stroke l, compresses it again with the compression device A, and pulls again. Since the tensile test is performed on the device B, it is possible to perform the tensile test a plurality of times with one test piece P, and the divided cell 1 is newly filled with the powder for each test. Then, the data measurement can be repeatedly performed without the need for the operation of molding the test piece P.

Further, in the powder adhesion measuring device according to the present invention, the push-up device C is arranged below the mounting table d on which the divisional cell 1 is mounted, and thereby the dividing unit mounted on the mounting table d is divided. Since the test piece P in the cell 1 can be pushed up to the divided cell 1 by a predetermined stroke l,
With the simple operation of operating the push-up device C, the test piece P that has been subjected to the tensile test can be repeatedly subjected to the tensile test with which accurate measurement can be obtained while the test piece P remains in the divided cell 1.

[Brief description of drawings]

1 and 2 show the conventional means, FIG. 1 is a partially cutaway front view of the main part of the compression device, and FIG. 2 is a partially cutaway front view of the main part of the tension device. 3 to 12 show an apparatus according to an embodiment of the present invention.
Figure is a schematic perspective view of the whole, Figure 4 is a perspective view of the main part of the same,
FIG. 5 is a partially cutaway perspective view of a divided cell, FIG. 6 is a partially cutaway front view of a main portion of another embodiment, FIGS. 7 and 8
FIG. 9 and FIG. 10, FIG. 10 and FIG. 11 and FIG. Description of reference symbols A ... compression device, B ... tension device C ... push-up device, P ... test piece M1, M2, M3, M4 ... motor S1 ... pressure sensor, S2 ... laser displacement meter S3 ...... Pressure sensor, l ... Stroke a ... Machine, b ... Platform c ... Supporting machine frame, d ... Standing platform e ... Transverse device, 1 ... Division cell 1a ... Upper half, 1b ... Lower half 10 ... Dividing surface, 11 ... Engaging flange 12 ... Inner cylinder, 13 ... Bottom lid 14 ... Step, 15 ... Dropping lid 2 ... Mounting table, 3 ... Compression Bar 30 ... Guide member, 31 ... Sliding member 32 ... Pressing member, 33 ... Stay 34 ... Mounting member, 35 ... Spring 4 ... Set base, 5 ... Clamp 50 ... Guide member, 51 ...... Sliding member 52 ...... Spring, 53 ...... Suspension rod 6 ...... Elevating mechanism, 60 ...... Screw rod 61 ...... Stay 62 ... Female screw 63 ... Conductive pulley, 64 ... Conductive belt 7 ... Lifting mechanism, 70 ... Screw rod 71 ... Stay, 72 ... Female screw 73 ... Conductive pulley, 74 ... Conductive belt 80 ... Fitting Joint part, 81 ... Through hole 82 ... Guide member, 83 ... Shaft supporting member 84 ... Screw rod, 85 ... Chain belt 90 ... Push-up rod, 91 ... Lifting mechanism 92 ... Machine casing, 93 ... ... Bearing support member 910 ... Screw rod, 911 ... Female screw 912 ... Conductive belt L ... Laser beam SW1, SW2, SW3, SW4 ... Switch

Claims (2)

[Claims] 1. A powder is filled in a cylindrical divided cell 1 which is divided into an upper half portion 1a and a lower half portion 1b from a dividing surface 10 provided at an upper and lower intermediate position of a body portion and compressed. The test piece P is compressed by the device A to form a test piece P in which the body circumferential surface is in close contact with the inner peripheral surface of the divided cell 1, and the test piece P is subjected to a tensile test by the tension device B together with the divided cell 1, and then the push-up device. C
The test piece P is raised by a predetermined stroke 1 with respect to the divided cell 1, compressed again by the compression device A, and again applied to the tension device B to carry out a tensile test, and a powder adhesion measuring method is characterized. 2. A dividing surface 10 provided at an upper and lower intermediate position of a body portion.
A cylindrical divided cell 1 which is divided into an upper half portion 1a and a lower half portion 1b, a mounting table d on which the divided cell 1 is mounted, and a compression device A disposed above the mounting table d. And a push-up device C disposed below the mounting table d, and the mounting table d is pushed up to a portion corresponding to the opening of the bottom surface of the divided cell 1 mounted on the upper surface thereof. A powder adhesion measuring device characterized in that a through hole (81) through which a push-up rod (90) for vertically moving the device (C) is penetrated to penetrate into the inner cavity of the divided cell (1) is formed.