JP2552038Y2 - Measuring and mixing equipment for powders and granules - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] This invention is based on the principle that a main material occupying a large volume or weight such as a synthetic resin material and a small volume or a large amount such as a coloring material, an additive, or another type of synthetic resin material. The present invention relates to a measuring and mixing apparatus for measuring and mixing a sub-material occupying a weight, for example, a powder or granule.

[Prior art] Conventionally, as this kind of a metering and mixing apparatus, (a) Although not shown, dissimilar materials in a plurality of main and sub material hoppers are used.
It is sent out by a feeder such as a screw feeder or an electromagnetic feeder and supplied to a weighing hopper.The supplied material is weighed in a desired amount by a weighing device such as a load cell, and then supplied to a mixing tank equipped with stirring blades to be mixed and received. The mixing tank has a large capacity with the hopper-shaped container arranged in an upright state, and the number of rotations of the stirring blade is not good because the mixing degree in the vicinity of the inner bottom of the mixing tank is not good. It is known to rotate at a relatively low speed.

Further, (b) Japanese Patent Application Laid-Open No. 61-220724 and (c) Japanese Patent Application Laid-Open
As shown in JP-A-58-89937, each material is supplied from a plurality of material supply hoppers to one mixing tank, and the materials are stirred and mixed by a stirring means provided in the mixing tank. Some are weighed by a weighing device (weighing means) such as a load cell or a weight receiver provided in the tank.
Are known.

Further, as shown in (d) JP-A-62-126915, a mixing tank having a main material tank, an auxiliary material tank, and a stirring means for mixing the materials from the main material tank and the auxiliary material tank. There is also known a vacuum resin molding apparatus including a storage chamber for temporarily storing the material from the auxiliary material tank and then supplying the material by inversion to the mixing tank.

[Problems to be solved by the invention]

However, according to the conventional mixing device (a), it has been recognized that it is best to operate the mixing tank with a large capacity and the stirring blades at a low speed. As a result, the mixing time could not be reduced.

Multiple primary and secondary material hoppers, feeders, weighing hoppers,
Since the weighing device and the mixing tank are installed in the vertical direction, the installation height is high and it cannot be installed at any place.In addition, it is difficult to clean when changing colors or changing materials, and maintenance is troublesome. Was. In addition, since each of the above components is required, there is a problem that the installation space becomes large and the apparatus becomes large.

According to the metering / mixing apparatuses of the conventional examples (b) and (c), it is recognized that the mixing tank has a large capacity and cannot be stirred at a high speed in a small-volume batch according to the examples. However, the above disadvantages cannot be eliminated. However, these constitutions (b) and (c) can solve the above-mentioned drawbacks due to their constitution.

In each of the conventional examples (a), (b), and (c), the configuration in which a weighing hopper capable of reversing forward and reverse is connected to any material hopper of a small component (usually, often a secondary material) Although not shown, the discharge amount of a small component from a feeder such as a screw feeder connected to the outlet of the material hopper is time-controlled using a timer or the like to calculate the supply amount of the small component to the mixing tank. Therefore, there is a problem that the measurement accuracy of the material of the small component to be mixed varies.

In addition, in any of the conventional examples (a), (b), (c), and (d), the amount of discharge is particularly small at an outlet of any material hopper of a large component (usually, often a main material). No damper means or the like for adjustment is provided, and the amount of large components to be supplied to the mixing tank is calculated by time control as in the case of the material hopper for small components described above. However, there was a problem that the measurement accuracy of the material was varied.

This invention solves the above-mentioned problems (1) to (4) by precisely measuring the supply amount of the material supplied from the main material hopper and the sub-material hopper to the mixing tank, thereby improving the mixing accuracy of the material in the mixing tank. Is to improve.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention is directed to a plurality of main material hoppers and sub-material hoppers; a mixing tank for mixing the materials from these main and sub-material hoppers; A metering means connected between the material outlets of the number of material hoppers and the mixing tank, and a measuring hopper provided to be capable of reversing forward and backward by an actuator; the mixing tank being inclined at a predetermined angle; A mixing / mixing device for powder and granules, wherein the stirring blade is internally provided and supported by a measuring device, and the rotation speed of the stirring blade can be arbitrarily varied from a constant or low to high speed; A discharge control damper composed of a rotating disk and a fixed plate is provided at the lower part of the material hopper, and the opening cross-sectional area of the material conducting hole of the fixed plate is reduced by rotating the rotating disk. A discharge port that can be changed is formed.

The materials from the main and sub material hoppers may be supplied to the mixing tank after passing through the collecting hopper as shown in the examples,
Alternatively, it may be supplied directly to the mixing tank (except for the one passing through the measuring hopper).

As a weighing device (weighing means) supporting the mixing tank, a weight-type weighing machine such as a load cell is used.

A discharge control damper including a rotating disk and a fixed plate is provided below the arbitrary number of material hoppers. The rotary disk of the discharge amount control damper is provided with a discharge port that can change the opening cross-sectional area of the material conduction hole of the fixed plate by rotating the rotary disk. The change of the opening cross-sectional area of the material conduction hole may be continuous or intermittent, and is optional.

Further, in the above case, a suction air source is connected to an arbitrary number of the main material hopper and the auxiliary material hopper, and when the discharge amount control damper is closed, the suction hopper sucks the material and pneumatically transports the material to the hopper. It is preferable to discharge the pneumatically conveyed material with a capacity corresponding to the degree of restriction of the discharge control damper when the discharge control damper is opened.

When the material in the main and sub material hoppers is supplied to the mixing tank by a discharge control damper or feeder, the mixing tank is inclined at a small capacity, so that a small amount of mixed material can be spread over the entire range from low speed to high speed. Can be stirred or mixed with constant or variable over time,
In addition, since the bottom in the mixing tank can be sufficiently stirred, uniform mixing can be achieved.

Since the mixing tank is received by a weighing device, the weight of the mixed material is directly measured by the mixing tank itself without a weighing hopper, and mixing is performed with the weighing apparatus.

[Action]

Of the materials to be mixed, small component materials (sub-materials) such as additives and masterbatch materials are weighed by a weighing hopper by a measuring means such as a load cell before being supplied to the mixing tank. The entire amount of the material weighed by the weighing hopper can be discharged without being adhered by inverting the weighing hopper by the actuator. Therefore, weighing accuracy is improved.

Before the main component of the main component is supplied to the mixing tank, the rotating disk constituting the discharge control damper is rotated by rotating the rotating disk so that the discharge port of the rotating disk and the material conducting hole of the fixed plate are rotated. By finely adjusting the discharge amount of the material by displacing the opening cross-sectional area formed by the above, the measurement accuracy is improved.

As described above, both the main material and the sub-material are supplied into the mixing tank in a state where the measurement accuracy is improved, and the mixing is performed. In the mixing tank, the mixing tank is inclined at a predetermined angle, and the number of rotations of the stirring blade provided in the mixing tank can be changed arbitrarily. Uniform mixing is possible.

〔Example〕

One embodiment of the present invention will be described below with reference to FIGS.

(1) is a frame of a measuring and mixing device for powder and the like, and an upper horizontal frame (2) of the frame (1) is provided with a main material hopper (3) of the synthetic resin material A and a synthetic resin material B. A main material hopper (4), a crushed material hopper (6), a master batch material hopper (7), and an additive hopper (8) are fixed.
The crushed material hopper (6), the master batch material hopper (7) and the additive hopper (8) are the auxiliary material hopper (5).
Is composed. These hoppers can be appropriately combined.

At the material outlet of each of the material hoppers, a feeder such as a discharge control damper, a vibration feeder or a screw feeder, which will be described later, is provided. In this embodiment, the main material hoppers (3) and (4) are provided with a discharge control damper (9), and the crushed material hopper (6) and the master batch material hopper (7).
Is provided with a vibration feeder (10), and the additive hopper (8) is provided with a screw feeder (11). The material hoppers (3), (4), (6),
The materials in (7) and (8) are fed to the collecting hopper (12) connected downstream by the feeder as described above. However, the materials of the master batch material hopper (7) and the additive hopper (8) are supplied to a reversible weighing hopper (14) provided with a weight type weighing means (13) such as a load cell, and weighed. After that, the weighing hopper (14) is inverted by the actuator (15) to supply the weighed material to the collecting hopper (12).

Reference numeral (16) in FIG. 6 denotes an opening / closing valve such as a solenoid valve for connecting / disconnecting the supply of fluid for operating the actuator (15).

(3a), (4a), (6a), (7a), (8a) are level meters,
(17) is a motor, and (18) is a mounting plate of the vibration feeder (10).

A mixing tank (30) in which a stirring blade (31) rotated by a driving source (32) faces is fixed to a lower portion of the gantry (1). That is, a bracket (20) is fixed to the bottom plate (19) of the gantry (1) by bolts or welding, and the head of the drive source (32) is fixed to the upper part of the bracket (20). The capacity of the mixing tank (30) is inclined at a predetermined angle, the rotation speed of the stirring blade (31) is constant, and the small capacity of the mixing tank (30) is inclined at a predetermined angle, the rotation of the stirring blade (31). The number is constant or can be arbitrarily varied from low speed to high speed. The inclination angle may be appropriately selected, such as 30 ° or 45 °. As shown in FIGS. 4 and 5, the drive shaft (33) of the drive source (32) is connected to the rotary shaft (31) of the stirring blade (31).
It is designed to be freely connected and disconnected from a). (43) is a bearing case, (35) is a bearing, (36) is a nut, (37) is a stopper, and this stopper (37)
The drive source (32) and the mixing source are mixed by contacting the stop bar (38), which is provided to be able to expand and contract, against the rest (39) fixed to the bottom plate (19) of the gantry (1) with bolts or welding. Prevent vibration of tank (30). In this embodiment, the stop rod (38) can be adjusted by a bolt, but may be an air cylinder or other lock mechanism instead.

The bracket (20) is provided with a weighing device (40) such as a load cell for weighing. The upper entrance (30a) of the mixing tank (30) is closed by a lid (30c) so that it can be opened and closed freely.
A communication hole (30d) formed in the lid (30c) and a chute (21)
The outlet (21b) of the collecting hopper (12) and the outlet (12a) of the collecting hopper (12) are connected to each other. In the mixing tank (30),
An outlet (30b) is formed in the lower side wall at the bottom, and this outlet (30b) is opened and closed by a discharge valve (42) operated by a hydraulic cylinder (41), and the material is discharged through a discharge port (43). After that, it is discharged to the receiving portion (44) as shown in FIG.

In FIG. 6, (22) is a reed switch, (45),
(46) is a level gauge provided in the receiving part (44), (47) is a limit switch, (48) is a solenoid valve, (50) is a fluid pressure cylinder operated by a solenoid valve (49), and a mixing tank ( Used to fix 30) at a predetermined angle.

Although the discharge control damper (9) shown in FIG. 6 can be arbitrarily selected, it is preferable to adopt the configuration shown in FIGS. 7 to 12.

That is, the discharge control damper (9) shown in FIGS. 7 to 12 is interposed between the upper and lower fixing plates (70) and (71) and the fixing plates (70) and (71). The rotating disk (60) is rotated by rotating the rotating disk (60) so that the material conducting holes (7) in the fixed plates (70) and (71) are formed.
2) and (73) are formed with a discharge port (61) capable of changing the cross-sectional area of the opening.

The upper fixing plate (70) and the lower fixing plate (71) are
As shown in FIG. 10 and FIG.
In the figure, the material conducting holes (72) and (73) are formed at the upper left side, and insertion holes (74) and (75) for inserting the pivot (62) are formed at the center. .

For example, the lower portions of the main material hoppers (3) and (4) to be connected are fitted into the material conducting holes (72) of the upper fixing plate (70), and the upper portion of the upper surface side of the material conducting holes (72) is fitted. Fixing plate (70)
Main material hopper (3), flange (3b) of (4),
(4b) is fixed with bolts (76). Also, a through hole (77) is formed in the upper fixed plate (70) at the center on the right side in FIG. 9, and a fixing pin (63) fixed in the through hole (77) to the rotating disk (60) is provided. The rotating disk (60) is rotated by rotating (up and down in FIG. 7) in a horizontal posture due to the expansion and contraction of the piston rod (81), and the material conducting holes (72) of both the fixed plates (70) and (71) are rotated. ) And (73) can be adjusted. Fixing pin (63) is cylinder mounting plate (82)
Through the piston rod (8) of the hydraulic cylinder (80)
1) and connected to the fluid cylinder (8
0) bolts (84) on both upper and lower fixing plates (70) and (71)
It is fixed to the stopped cylinder bracket (83) with bolts (85) and mounting pins (86). In FIG. 9, (76
a) and (87) are bolt holes.

The lower fixing plate (71) is different from the upper fixing plate (70) in that the through hole (77) is not formed, and other configurations are substantially the same.

As shown in FIGS. 11, 12, and 8, etc., the rotary disk (60) has an insertion hole (64) for inserting a pivot (62) at the center thereof, and the insertion hole (64) Bearing (6
In 5), the pivot (62) is rotatably supported. Further, the discharge port (61) is formed in, for example, a cocoon shape in which an opening cross-sectional area is large on one side and small on the other side. (66) is an insertion hole for inserting the fixing pin (63). (67) is an arc-shaped notch. The notch (67) elastically supports a claw (90a) of a stopper arm (90), which will be described later, to regulate the rotation of the rotating disk (60). As described above, the opening amounts of the material conducting holes (72) and (73) of the fixing plates (70) and (71) can be finely adjusted.

The stopper arm (90) is, as shown in FIGS. 7 and 8, a piston rod (91) of a fluid pressure cylinder (91) fixed to the upper end surface of the upper and lower fixing plates (70) and (71) in the drawing. 92) and a mounting plate (93).
That is, in the drawing of the fixing plates (70) and (71), the cylinder mounting plate (94) is bolted (95) to the upper end surface, and the cylinder head (94) of the fluid pressure cylinder (91) is fixed to the cylinder mounting plate (94). 91a) is connected with the connecting pin (96), the tip of the piston rod (92) is screwed into the mounting plate (93), and the base end of the stopper arm (90) is connected to the mounting plate (93) with the pin (97). Are combined. The approximate center of the stopper arm (90) is rotatably supported on the upper and lower fixing plates (70) and (71) by a pivot (98), and the piston rod (92) of the fluid pressure cylinder (91) is 7, the notch (67) of the rotating disk (60) is pressed and locked by the claw (90a) of the stopper arm (90) to advance the rotating disk (60). Prevent rotation. On the other hand, when the rotation of the rotating disk (60) is permitted, the claw (90a) of the stopper arm (90) is inserted by inserting the piston rod (92).
Is released (see the two-dot chain line in FIG. 7) so that the rotating disk (60) can be rotated. In FIG. 7, (99) indicates that the discharge port (61) is rotated counterclockwise (61).
A stopper that stops at the step (67a) of the notch (67) when it comes to the position (a) to prevent the rotation of the rotating disk (60).

The emission control damper (9) having the above structure
The configuration shown in the drawing can also be adopted. As can be seen from the figure, this material contains, for example, a main material hopper (3) containing a large-capacity main material, a main material hopper (4) containing a small-capacity main material, and a small-volume crushed material. At each outlet of the crushed material hopper (6),
0) and a discharge control damper (9) composed of a fixed plate (70), (71), etc., and the hoppers (3), (4),
(6) has a suction air source (10
0), and a transport pipe (101) connected to a transport source (not shown) is connected to the material inlet. When the discharge amount control damper (9) is closed, the hopper (3),
(4) The material is pneumatically transported through the transport pipe (101) through (6), and the pneumatically transported material is transferred according to the degree of restriction of the control damper (9) when the discharge control damper (9) is opened. The volume of material is discharged to the mixing tank (30) by its own weight.

With this configuration, when the material is supplied from the material hopper to the mixing tank (30) by the discharge amount control damper (9) and the suction air source (100), the large volume material and small Regardless of the capacity of the material, the degree of squeezing between the rotating disc (60) and the discharge port (61) between the fixed plates (70) and (71) and the material conduction holes (72) and (73) By performing the fine adjustment, a required amount of each material to be mixed can be reliably supplied without scattering dust and the like, and the measurement accuracy is improved.

FIG. 14 shows a time chart of the above embodiment,
Mixing was completed in 60 seconds per cycle from the time of material supply to the end of mixing.

In FIG. 1 to FIG. 3, (23) is a control panel for controlling the level meter, the feeder, the discharge control damper, the driving source of the mixing tank, the weighing hopper, and the like.

In the present invention, the collecting hopper (12) is omitted, and the material from each material hopper is directly mixed from each feeder (30).
Can also be supplied.

According to the above embodiment, by inclining the mixing tank (30) with a small volume, a small amount of mixed material can be agitated and mixed over the entire range from low speed to high speed while being constant or variable. Since the bottom in the parentheses) can be sufficiently stirred, uniform mixing can be achieved. In addition, the mixing time can be reduced.

In addition, since the mixing tank (30) is received by the measuring device (40), the weight of the mixed material is directly measured in the mixing tank (30) itself without using a measuring hopper as in the conventional example, and mixing is performed together therewith. be able to.

Further, according to the present embodiment, the material from any number of material hoppers of the small components is supplied to the weighing hopper to which the weighing means is connected and weighed, and the weighing hopper is provided so as to be reversible by the actuator. Therefore, before the material of the small component to be mixed is supplied to the mixing tank, the weighing unit is accurately and stably weighed by the weighing means, and even if the material easily adheres to the weighing hopper, the weighing hopper is inverted. As a result, the entire amount can be discharged, so that it is possible to supply the mixture to the mixing tank while performing accurate measurement.

[Effect of the invention]

According to the present invention, (1) a discharge control damper composed of a rotating disk and a fixed plate is provided below the material hopper, and the rotating disk is rotated on the rotating disk. In order to change the opening cross-sectional area of the material conduction hole of the fixed plate, the material of the fixed plate is rotated by the rotation of the rotating disk before the material to be mixed is supplied to the mixing tank. Since the discharge amount of the material can be finely adjusted by displacing the opening cross-sectional area of the conduction hole, the measurement accuracy is improved.

(2) With the configuration as described in claim (2), when the material is supplied from the material hopper to the mixing tank by suction of the suction air source, the discharge disk formed on the rotating disk and the amount fixing plate forming the discharge amount control damper. By finely adjusting the degree of squeezing between the outlet and the material passage hole, the required amount of each material to be mixed can be reliably supplied without scattering dust and the like, and the measurement accuracy is improved.

[Brief description of the drawings]

The figures each show an embodiment of the present invention. 1 is a front view, FIG. 2 is a right side view, FIG. 3 is a plan view,
FIG. 4 is an enlarged front view showing a part of the mixing tank and the vicinity of its driving source in a partially cutaway view, FIG. 5 is a left side view of FIG. 4, FIG. 6 is a process diagram, and FIG. 8 is a right side view of FIG. 7, FIG. 9 is a plan view of a fixed plate, FIG. 10 is a right side view of FIG. 9, and FIG. 11 is a view of a rotating disk. FIG. 12 is a plan view, FIG. 12 is a central sectional view of FIG. 11, FIG. 13 is a schematic diagram showing another example of assembling the discharge control damper, and FIG. 14 is a time chart. (3) ... Main material hopper, (4) ... Main material hopper, (5) ... Secondary material hopper, (6) ... Crushed material hopper, (7) ... Master batch material hopper, (8) ...
... additive hopper, (9) ... discharge control damper,
(12) ... Collecting hopper, (13) ... Measuring means, (14)
… Measuring hopper, (15) …… Actuator, (20)
Bracket, (30) Mixing tank, (31) Stirring blade, (32) Drive source, (40) Measuring device, (42)
... discharge valve, (43) discharge port), (60) ... rotating disk, (6
1) ... outlet, (62) ... pivot, (64) ... insertion hole,
(67) ... Notch, (70) ... Upper fixing plate, (71) ...
Lower fixing plate, (72), (73) ... Material conduction hole, (74),
(75) ... insertion hole, (90) ... stopper arm, (10
0)… suction air source, (101)… transport pipe.

Claims (2)

(57) [Scope of request for utility model registration] A plurality of main material hoppers and auxiliary material hoppers; a mixing tank for mixing materials from the main and sub material hoppers; and an optional number of material hoppers of small components among the main and sub material hoppers. Between the material outlet and the mixing tank,
A weighing hopper connected to a weighing means and provided in a reversible manner by an actuator; wherein the mixing tank is inclined at a predetermined angle and has a stirring blade therein, and is supported by a weighing device; In a mixing apparatus for a powder or the like configured to be able to arbitrarily change the rotation speed of the stirring blade from a constant or a low speed to a high speed, a discharge amount from a rotating disk and a fixed plate is provided below the material hopper. A control damper, wherein the rotary disk is formed with a discharge port capable of changing an opening cross-sectional area of a material conducting hole of the fixed plate by rotating the rotary disk; Weighing and mixing equipment. 2. A suction air source is connected to an arbitrary number of the main material hopper and the auxiliary material hopper, and when the discharge control damper is closed, the material is pneumatically transported to the hopper by suction of the suction air source. 3. The apparatus according to claim 1, wherein when the discharge control damper is opened, the conveyed material is discharged at a volume corresponding to the degree of squeezing of the discharge control damper.