JPH0843177A - Measuring and blending method - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object to provide a metering and blending method capable of obtaining a rapid and accurate blending result. [Structure] When the raw materials A and B are metered and blended, a plurality of raw materials are simultaneously supplied to the blending container by the first and second feeders at the same time by the emission control method in # 1, and in the first and second feeders in # 2. Stop the feeding of the feeder of No. 3 and weigh the total weight of the raw materials put in the blending container in # 3. From the difference between the total weight of the raw materials put in the blending container and the target weight, the required remaining amount for each raw material In step # 4, the required remaining amount of raw material A is supplied to the mixing container in a small amount by the feed rate control method while measuring the mixing container. A small amount is supplied by the supply amount control method to measure and mix.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a metering and blending method.

[0002]

2. Description of the Related Art When a plurality of raw materials are mixed in a prescribed ratio, the supply amount is controlled by a supply amount control method or a discharge amount control method.

The supply amount control method is carried out as shown in FIG. Here, the raw material A and the raw material B are defined by a prescribed ratio "A:
When blending with B = a: b ″ to obtain a blended raw material having a total amount of C, the raw material A is loaded into the hopper 1a. The raw material B is loaded into the hopper 1b.

While weighing the blending container 2 with the platform scale 3c, the motor 4a is operated to operate the feeder 5a for cutting out the raw material A from the hopper 1a. The feeder 5a is operated until the net weight of the platform scale 3c becomes "C. (a / a + b)".

Next, while the blending container 2 is weighed by the platform scale 3c, the motor 4b is operated to operate the feeder 5b for cutting out the raw material B from the hopper 1b. The feeder 5b is operated until the net weight of the platform scale 3c becomes "C".

Alternatively, if the actual amount of the raw material A to be dispensed is Wa, the required amount of the raw material B is "b.Wa / a = Wb", so the net weight of the platform scale 3c is "Wa + Wb".
The feeder 5b is operated until it becomes "".

The emission control method is carried out as shown in FIG. The hopper 1a and the feeder 5a are supported by the platform scale 3a. The hopper 1b and the feeder 5b are supported by the platform scale 3b.

The feeders 5a and 5b are operated at the same time.
When the initial weight values of the platform scales 3a and 3b are wa and wb, respectively, the controller 6a operates the feeder 5a until the platform scale 3a has a weight value of "wa-C. (A / a + b)".

The control section 6b operates the feeder 5b until the weight value of the platform scale 3b becomes "wb-C. (B / a + b)".

[0010]

[Problems to be Solved by the Invention] In the supply amount control method,
Although it can be accurately blended, platform 3 for each raw material A and raw material B
There is a problem that it takes too much time because the measurements are sequentially performed at c.

In the discharge amount control method, since the raw materials A and B can be charged into the blending container 2 at the same time, a short processing time is required, but on the other hand, the weight of each discharge mechanism (feeders 5a and 5b) is measured by the platform scales 3a and 3b. There is a problem in that accurate metering and blending cannot be performed due to factors such as vibration of the discharge mechanism, because the end time of dispensing is measured and controlled.

As described above, conventionally, it has been compelled to sacrifice one of accuracy and processing time, and when accurate metering and blending is required in the conventional metering and blending, a supply amount control method is adopted to speed up the process. Emission control methods are used when various treatments are required.

An object of the present invention is to provide a metering and blending method capable of obtaining a rapid and accurate blending result.

[0014]

[Means for Solving the Problems] In the metering and blending method of the present invention, when metering and blending a plurality of raw materials, a plurality of raw materials are simultaneously supplied to a blending container by separate feeders, and the dispensing of the feeder is stopped. Weigh the total weight of the raw materials put in the blending container, calculate the required residual amount for each raw material from the difference weight between the total weight of the raw materials put in the blending container and the target weight, and calculate the required residual amount for each raw material. It is characterized in that the amount is sequentially dispensed to the blending container.

[0015]

According to this structure, a plurality of raw materials are simultaneously charged into the blending container until just before the target total amount of the blended raw material is placed in the blending container, and thereafter, the required residual amount of each raw material is sequentially discharged to obtain the target total amount. Get closer to.

[0016]

EXAMPLES The metering and blending method of the present invention will be described below with reference to specific examples shown in FIGS. The same parts as those shown in FIGS. 3 and 4 showing the conventional example will be described with the same reference numerals.

As shown in FIG. 2, the hopper 1a and the feeder 5a for cutting the raw material A from the hopper 1a are supported by a platform scale 3a. The hopper 1b and the feeder 5b for cutting the raw material B from the hopper 1b are the platform scales 3
supported by b. Mixing container 2 arranged at a position for receiving the raw materials dispensed from feeders 5a, 5b
Are supported by the platform scale 3c.

The main controller 6c controls the operation of the feeder 5a via the controller 6a based on the weight value of the platform scale 3c,
It also controls the operation of the feeder 5b via the control unit 6b. The main controller 6c has a mixing ratio of the raw material A and the raw material B “
A: B = a: b "and the total amount C are set, and the main control unit 6c instructs the control units 6a and 6b to supply the large supply amount.

"C. (a / a + b) .K = wa" is instructed to the control unit 6a, and "C. (b / a + b) .K = wb" is instructed to the control unit 6b. Here, K is a coefficient less than “1”.

The control units 6a and 6b instruct # 1 shown in FIG. 1 to the feeders 5a and 5b [first and second feeders] at the same time to start the operation and start large supply. Feeders 5a, 5b
Assuming that the weight values of the platform scales 3a and 3b immediately before starting the operation of No. 3 are Wa and Wb, respectively, in # 2, the controller 6a causes the platform 3
When it is detected that the weight value of a has become "Wa-wa", the motor 4a is temporarily stopped.
The control unit 6b detects that the weight value of the platform scale 3b has become "Wb-wb" and temporarily stops the motor 4b.

In # 3, the main controller 6c reads the weight value Wc of the platform scale 3c at this time, and (C-Wc) (a / a + b) = w
a '(C-Wc) (b / a + b) = w
From the calculation of b ′, the required remaining amounts wa ′ and wb ′ of the raw materials A and B are calculated.

In # 4, the main control section 6c repeatedly reads the weight value of the platform scale 3c and instructs the control section 6a to supply a small amount to perform static weighing, and the necessary residual amount wa 'is added to the blending container 2. When it is detected, the controller 6a is instructed to stop the feeder 5a. At this time, the feeder 6b is stopped.

In # 5, the main control unit 6c repeatedly reads the weight value of the platform scale 3c and instructs the control unit 6b to supply a small amount to perform static weighing, and the required remaining amount wb 'is added to the blending container 2. When it is detected, the controller 6b is instructed to stop the feeder 5b. At this time, the feeder 5a is stopped.

In this way, the total amount C of the compounding raw material having the compounding ratio "A: B = a: b" is obtained in the compounding container 2. In the above-mentioned mixing operation, since the feeders 5a and 5b simultaneously supply a large amount to the mixing container 2 by the discharge control method based on the weight value of the platform scales 3a and 3b, the mixing processing time can be shortened and the mixing container 2 When the amount of the raw material put into the container is before the fixed amount, the required residual amount for each raw material is sequentially supplied in small amounts based on the weight value of the platform scale 3c, and precisely delivered to the blending container 2 by the supply amount control method. Accurate compounding and weighing can be realized.

In the above embodiment, two kinds of raw materials were metered and blended, but the same applies to the case of three or more kinds of metered blends. Before the quantitative determination, the required residual amount of each raw material is precisely dispensed to the blending container 2 in a small supply.

[0026]

As described above, according to the present invention, when a plurality of raw materials are metered and blended, the plurality of raw materials are simultaneously supplied to the blending container by different feeders, the feeding of the feeder is stopped, and the blending container is mixed. Weigh the total weight of the raw materials put in, calculate the required remaining amount for each raw material from the difference weight between the total weight of the raw materials put into the blending container and the target weight,
Since the required residual amount for each raw material is sequentially paid out to the blending container, a plurality of raw materials are put into the blending container at the same time until just before the target total amount of the blending raw material is put into the blending container. By dispensing the amounts in sequence, quick and accurate blending results can be obtained.

[Brief description of drawings]

FIG. 1 is a flow chart of the metering and blending method of the present invention.

FIG. 2 is a configuration diagram of a specific example of the weighing and blending method of the present invention.

FIG. 3 is an explanatory diagram of a conventional supply amount control method.

FIG. 4 is an explanatory diagram of a conventional emission control method.

[Explanation of symbols]

 1a, 1b hopper 2 compounding container 3a, 3b, 3c stand scale 5a, 5b feeder 6a, 6b control unit 6c main control unit

Claims (2)

[Claims] 1. When weighing and blending a plurality of raw materials, the plurality of raw materials are simultaneously supplied to a blending container by different feeders, the feeding of the feeder is stopped, and the total weight of the raw materials put in the blending container Weighing and blending method to calculate the required remaining amount of each raw material from the difference weight between the total weight of the raw materials and the target weight put into the blending container, and sequentially paying the required remaining amount for each raw material to the blending container . 2. When metering and blending a plurality of raw materials, the plurality of raw materials are simultaneously fed to the blending container by separate feeders by a discharge control method, the feeding of the feeder is stopped, and the raw materials are fed to the blending container. Weigh the total weight of the raw materials and calculate the required residual amount for each raw material from the difference between the total weight of the raw materials put in the blending container and the target weight. A metering and blending method in which the amount is sequentially dispensed to the blending container by a supply amount control system.