JP4275779B2 - Filling and packing machine for powder and granule with a small amount of addition equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a powder filling and packaging machine having a minute amount addition device for adding a trace amount of additive to the powder, and in particular, filling the powder in a powder filling and packaging machine. The present invention relates to a powder filling and packaging machine having a trace addition device that operates in conjunction with the rotation of a screw feeder that is transferred to the mouth and uniformly adds a trace amount of additives to the powder.
[0002]
[Prior art]
In general, powder, especially milled wheat flour, etc. is automatically weighed when filling a packaging bag, and a predetermined amount of powder is packaged and supplied to the market as a product. Is done.
Some of these granular materials such as wheat flour are supplied to the market after adjusting the quality by adding a small amount of additives depending on the application and demands of customers. For example, flour for school lunches is supplemented with several tens of ppm to several hundreds of ppm of a nutrient substance with respect to 25 kg of large flour.
[0003]
When producing a granular material containing such a small amount of additive, conventionally, after adding a predetermined amount of additive to the granular material, the mixture is sufficiently stirred and mixed. In order to make the content of the additive contained in the granular material uniform, a predetermined amount is added to the granular material. After adding the additive, a plurality of stirring and mixing are performed to prepare the powder containing the additive, and the powder containing the adjusted additive is put into a filling and packaging machine and weighed. Packing into a packaging bag by a predetermined amount has been performed.
[0004]
However, in this conventional method, at least a step of adding a predetermined amount of additive to the powder and performing a plurality of stirring and mixing to adjust to a powder containing the additive, and addition after adjustment When a powdered product containing a product is put into a filling and packaging machine, weighed and packed into a packaging bag by a predetermined amount, and when this is performed with a series of automatic mixing devices and filling and packaging machines, multiple stages are required. Using a stirring / conveying device such as a screw conveyor, a packaging bag is packed through a long conveying path.
[0005]
For this reason, after manufacturing a granule to which an additive has been added, when manufacturing a granule to which no additive is added using the same automatic mixing device or filling and packaging machine, the granule to which the additive has been added during product switching It was necessary to clean the inside of the apparatus of the whole process that the body passed, and to perform a very complicated and time-consuming work. When this cleaning is performed by washing together, dozens of contaminated semi-finished products are to be manufactured.
In addition, if the amount of one lot is increased in order to avoid repeating this complicated and time-consuming work, the remaining product has to be stocked.
[0006]
For this reason, as shown in Japanese Patent Laid-Open No. 5-31349, the present applicant arranges the trace additive supply port of the trace addition apparatus between the blows of the fixed-quantity bagging apparatus that puts the granular material into the packaging bag. , A small amount of powder into the granular material to be blown and dispersed in the granular material together with air at a pressure almost equal to or higher than the pressure of the mixed flow of granular material and air by the blowing tube of the quantitative bagging device Invented additive supply device.
[0007]
[Problems to be solved by the invention]
In this trace additive supply device, the amount of the additive added to one packaging bag is constant, and the device that must be cleaned as the device through which the granular material added with the additive has passed is a quantitative bag. Although only the blowing pipe of the filling device has been solved, the problems of the prior art are almost solved, but the additive is not sufficiently mixed with the powder and the powder is unevenly distributed at the outer edge in one packaging bag. It became clear to have a tendency.
The present invention solves this remaining problem, and even in a single packaging bag, the additive is uniformly dispersed and packaged, and the amount of equipment that needs to be cleaned when switching is minimized. An object of the present invention is to provide a powder filling and packaging machine having an addition device.
[0008]
[Means for Solving the Problems]
In order to solve this problem, the present invention is supplied from a powder storage unit having a hopper , powder stirring means and a screw conveyor disposed below the stirring means, and the powder storage part. A powder feeder having a screw feeder for transferring a granular material and a filling port for filling the granular material into a packaging bag, and a transfer bagging portion disposed below the granular material storage unit. A filling and packaging machine having a trace addition device in which an additive supply port is arranged at a connecting portion between the granular material storage unit and the transfer bagging unit, and a trace amount of additive in the trace addition device It is intended to provide a powder filling and packaging machine having a micro-adding device characterized in that the powder and granule to which is added is stirred by the screw feeder and supplied to the filling port.
[0009]
And it is desirable for the said trace addition apparatus to operate | move in conjunction with the said screw feeder, and to add the quantity of the additive corresponding to the supply amount of the granular material by the said screw feeder of the said transfer bagging part.
In addition, it is preferable that the trace amount adding device conveys the additive by an air flow and supplies the additive to the additive supply port of the connecting portion.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a powder filling and packaging machine having the micro-adding device of the present invention will be described with reference to the drawings. FIG. 1 shows a powder filling and packaging machine having a trace addition device according to the present invention. A quantitative bagging device, which is a powder filling and packaging machine, is shown on the left side, and a trace addition device is shown on the right side. ing. FIG. 2 is a detailed view showing the tip of the micro-adder, and FIG. 3 is a view taken along the line AA of FIG. 2 showing an example of the shape of the dispersion blade.
[0011]
The fixed-quantity bagging apparatus 10 shown in FIG. 1 is provided with a powder storage unit 11 that stocks and sequentially supplies flour that is powder, and is supplied from the powder storage unit 11 to the lower part thereof. A transfer bag filling unit 12 is provided for transferring a certain amount of wheat flour and filling the packaging bag. The granular material storage unit 11 and the transfer bag filling unit 12 are connected to each other by a connecting unit 13 and are leg portions 14. It is placed on the top.
[0012]
The powder body storage unit 11 is provided with a hopper 20 that stocks flour at the top, and a plurality of stirring blades 21 are installed below the hopper 20 to stir the flour and prevent the occurrence of bridges. A stirring shaft 22 is disposed, and a screw conveyor 23 for supplying flour to the transfer bagging unit 12 is provided further below the stirring shaft 22. The stirring shaft 22 and the screw conveyor 23 are connected to each other by a conduction means 24 such as a V-belt, and are rotationally driven via a conduction means 26 by a drive motor 25 provided at the lower end of the leg portion 14.
[0013]
On the other hand, a screw feeder 30 is provided in the transfer bagging unit 12 provided below the granular material storage unit 11 and connected by the connecting unit 13, and the flour is filled into the filling port 31 by the rotation of the screw feeder 30. A predetermined amount (for example, 25 kg) of flour is filled in the packaging bag 33 which is transferred toward the container and pushed out from the filling port 31 and placed on the weighing device 32.
[0014]
The screw feeder 30 is rotated at a high speed for a large amount of filling the packaging bag 33 with a large amount of flour in a short time, and at a low speed for a small amount of filling while controlling the filling amount of the flour. After filling most of the flour filled in the packaging bag 33 with a large volume, the weight of the filled flour is weighed with the weighing device 32 and filled with the shortage with a small amount, and the total weight is about 25 seconds in about 10 seconds. Is accurately measured and filled into the packaging bag 33.
[0015]
The screw feeder 30 is rotationally driven via a conducting means 35 by a variable speed motor 34 provided inside the leg portion 14 and capable of controlling the rotational speed, and the rotational speed is detected by a detecting means 36 so that the screw feeder 30 is predetermined. It is automatically controlled to rotate at a rotation speed of.
[0016]
Here, in this embodiment, the screw conveyor 23 provided in the granular material storage unit 11 is configured to rotate only when the screw feeder 30 of the transfer bagging unit 12 rotates at a high speed. In addition, when dispensing, it is stopped so that excessive flour is not supplied to the transfer bagging unit 12, but the rotational speed of the drive motor 25 that drives the screw conveyor 23 is changed to a variable speed motor 34 that drives the screw feeder 30. It is also possible to supply the flour from the granular material storage unit 11 to the transfer bagging unit 12 according to the amount of flour transferred by the screw feeder 30 by making it variable in synchronization with the above.
[0017]
The trace addition device 40 is a pressure vessel as a whole, and is provided with an additive reservoir 41 provided with an airtight hopper 42 at the upper end and a stirring shaft 44 with a plurality of stirring blades 43 attached to the lower part thereof. An additive transfer unit 45 having a screw feeder 46 is provided below the additive storage unit 41. Then, the additive such as vitamin powder such as vitamin powder transferred by the screw feeder 46 fills the space between the terminal end of the screw feeder 46 and the dispersion blade 47 as shown in FIG. The mixture is pushed out from the gap between the dispersion blades 47 by the additive transferred in the above and delivered to the dispersion chamber 48.
[0018]
Here, as shown in FIG. 3, the dispersion blade 47 is a disc in which gaps are formed radially, and the additive filled in the space between the terminal end of the screw feeder 46 and the dispersion blade 47 is further Since it is gradually pushed out from the gap of the dispersion blade 47 by the pressure of the subsequent additive transferred by the screw feeder 46, the pulsating supply of the screw feeder is prevented, and the additive is stably pushed out in a constant amount. 48.
[0019]
Additives generated by the compressor 56 and supplied through the pipe 50 and sent to the dispersion chamber 48 by the airflow of compressed air flowing from the top to the bottom as indicated by the arrows shown in FIG. Is added to the flour in the connecting portion 13 from the additive supply port 52 provided in the connecting portion 13 of the fixed-quantity bagging apparatus 10 through the pipe 51 together with the airflow.
[0020]
Here, the piping 50 sends compressed air from the compressor 56 to the dispersion chamber 48 and the airtight hopper 42, and the piping 51 adds a mixed air flow of compressed air and additive from the dispersion chamber 48 to the connecting portion 13. This is a pipeline that leads to the product supply port 52. Moreover, P in the figure is a pressure gauge.
In the illustrated example, the balance between the pressure in the airtight hopper 42 and the pressure in the dispersion chamber 48 is maintained by the pressure reducing valves 50 a and 50 b provided in the branched pipe 50. The internal pressures of the airtight hopper 42 and the dispersion chamber 48 are preferably the same or slightly higher in the airtight hopper 42 in order to prevent the backflow of the additive.
[0021]
The screw feeder 46 is rotated at the same timing as the screw feeder 30 of the fixed-quantity bagging apparatus 10 . Thereby, the additive of the quantity proportional to the supply quantity of flour can be added to the flour of the connection part 13 from the additive supply port 52. FIG.
The additive added to the flour of the connecting portion 13 is added only to the flour at the mouth of the additive supply port 52. Thereafter, the flour is stirred and mixed by the screw feeder 30 and uniformly mixed to be packed in a transfer bag. Since the packaging bag 33 is filled from the filling port 31 of the part 12, wheat flour in which the additive is uniformly mixed in all parts of the packaging bag 33 can be obtained.
Of course, in the present invention, as in the prior art, the filling port 31 may be blown with air to fill the packaging bag 33 with flour.
[0022]
In addition, the supply direction of the additive from the additive supply port 52 to the connecting portion 13 may be the same direction as the conveying direction of the flour or the like by the screw feeder 30 and the screw conveyor 23 or may be transverse to the conveying direction. Although it may be from the direction, the direction from the lateral direction is preferred.
Moreover, in order to raise the swallowing efficiency of a granular material in the fixed quantity bagging apparatus 10, normally, although the rotation of the screw feeder 30 and the screw conveyor 23 is made into the mutually opposite direction, when supplying an additive from the said horizontal direction, It is preferable to supply the additive from the opposite direction (the direction against the rotation) with respect to the rotational direction of both.
[0023]
The trace addition device 40 is entirely mounted on the weighing device 55, and continuously measures the weight of the additive consumed as a decrease in the weight of the trace addition device 40 as a whole, and determines the amount of additive added to the flour. Monitoring. Each time the packaging bag 33 is filled with flour, the amount of additive added to the flour in the packaging bag is recorded and output to the printer as necessary. In order to control the supplied amount of the attachment, it is easiest to increase or decrease the number of rotations of the screw feeder 46 of the trace addition device 40.
[0024]
【Example】
[Example 1]
Using the powder filling and packing machine shown in FIG. 1, wheat powder to which nutrient substance powder was added was filled in the packaging bag 33.
The packaging amount is 25 kg, and the amount of nutrient powder added is 8 g to 9 g. The filling time is 8 seconds and the dispensing time is 2 seconds for a total of 10 seconds. went. Moreover, the rotation directions of the screw feeder 30 and the screw conveyor 23 were opposite to each other.
[0025]
In addition, the addition of the nutrient substance powder to the wheat flour, that is, the supply of the nutrient substance powder to the connecting portion 13 is performed as shown in FIG. 4 (A). Additive supply ports 52a and 52b are provided in the lateral direction with respect to the direction, and supply of nutrient substance powder from the opposite direction to the rotational direction of the screw feeder 30 or the like using the additive supply port 52a 1), and supply of nutrient substance powder from the same forward direction using the additive supply port 52b (Invention Example 2).
[0026]
For comparison, the filling port 31 is provided with a nozzle for supplying an additive in the direction shown by the arrow in FIG. 4B, and as shown in a and b, the edge of the filling port 31 (Comparative Example 1). ) And the center (Comparative Example 2) except that the nutritional substance powder was supplied, the packaging bag 33 was filled with the wheat flour to which the nutritional substance powder was added in exactly the same manner as in the inventive example.
[0027]
As described above, after filling the packaging bag 33 with the flour containing the nutrient substance powder, the obtained packaging bag 33 is opened, and both sides (one side and two sides) of the packaging bag 33 on the large area side. , And the dispersion state of the nutrient substance powder in the cross section in the short direction.
As a result, as shown in FIG. 5, in Comparative Example 1 and Comparative Example 2, a large amount of nutrient substance powder is present on both sides of the packaging bag 33 and is not dispersed therein, and Even on the surface, there was a difference in the amount of nutrient powder.
On the other hand, in Invention Examples 1 and 2, in Invention Example 2, there is a little more nutrient powder in the bottom portion on the two sides of the packaging bag 33, but the nutrient powder is well dispersed as a whole. It was.
In FIG. 5, the rectangles at the corners shown on the first and second surfaces are the filler inlets in the packaging bag 33.
[0028]
[Example 2]
In accordance with Invention Example 1 of Example 1, the amount added per bag when 7.5 g of nutrient substance powder is added to 25 kg of wheat flour is shown in a graph in FIG. 6.
As shown in the figure, an average of 7.59 g and a standard deviation of 0.28 g were obtained, and good results could be obtained that greatly exceeded the required allowable range of 5 to 10 g per bag. In addition, as a result of standing the filled packaging bag, dividing it into several areas and testing it with a reagent using the Pecker test method, the uneven distribution of the nutrient substance powder was not recognized.
[0029]
【The invention's effect】
Since the present invention is configured as described above, the amount of the additive added to one packaging bag is constant, the additive is not sufficiently mixed with the granular material, and is not unevenly distributed, and When switching products, the part that must be cleaned as a device through which the powder added with additives has passed is only after the connecting part between the powder storage part and the transfer bagging part of the quantitative bagging device, It is sufficient to clean only the connecting part and the transfer bagging part, which facilitates cleaning, and about 25 kg large bags are sufficient for co-washing.
[0030]
In addition, since the additive is gradually pushed out and supplied from the gaps of the dispersion blades in which gaps are radially formed in the disk, the pulsating supply is prevented and the additive is stably and quantitatively delivered to the granular material. Can be added. Furthermore, the powder and granule to which the additive has been added are stirred and mixed by a screw feeder, uniformly mixed, and filled into the packaging bag from the filling port, so that the additive is uniformly mixed in all parts of the packaging bag. The
[Brief description of the drawings]
FIG. 1 shows a powder filling and packaging machine having a trace addition device of the present invention.
FIG. 2 is a detailed view showing a tip portion of the trace addition device.
FIG. 3 is a view taken along the line AA in FIG. 2 showing an example of the shape of the dispersion blade.
FIGS. 4A and 4B are schematic diagrams for explaining an example. FIGS.
FIG. 5 is a table for explaining the effects of the present invention.
FIG. 6 is a graph showing the amount of addition for each bag when using a powder filling and packaging machine having a trace addition device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fixed-quantity bagging apparatus 11 Powder storage part 12 Transfer bag packing part 13 Connection part 14 Leg part 20 Hopper 21 Stirring blade 22 Stirring shaft 23 Screw conveyor 24,26 Conducting means 25 Drive motor 30 Screw feeder 31 Filling port 32 Metering apparatus 33 Packaging bag 34 Variable speed motor 35 Conducting means 36 Detection means 40 Trace addition device 41 Additive storage section 42 Airtight hopper 43 Stirring blade 44 Stirring shaft 45 Additive transfer section 46 Screw feeder 47 Dispersion blade 48 Dispersion chamber 50, 51 Piping 50a 50b Pressure reducing valve 52 Additive supply port 55 Metering device 56 Compressor

Claims (3)

A hopper , a powder particle agitation unit and a powder particle storage unit having a screw conveyor disposed below the agitation unit, a screw feeder for transferring the particle material supplied from the particle particle storage unit, and the powder A powder filling and packaging machine having a filling port for filling a packing bag with granules, and a transfer bagging part disposed below the powder storage part,
A granular material having a trace addition device in which an additive supply port is arranged at a connecting portion between the granular material storage unit and the transfer bagging unit, and a trace amount of additive is added by the trace addition device A powder filling and packaging machine having a micro-adding device, wherein the powder feeder is stirred with the screw feeder and supplied to the filling port. The trace addition according to claim 1 , wherein the trace addition device operates in conjunction with the screw feeder and adds an amount of additive corresponding to the amount of powder supplied by the screw feeder in the transfer bagging portion. Filling and packaging machine for powder and granular materials. The powder filling package having a micro-adder according to claim 1 or 2 , wherein the micro-adder conveys the additive by an air flow and supplies the additive to the additive supply port of the connecting portion. Machine.

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