JP2567462B2 - Granular mixture divided take-out method and its mixing processing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of dividing and taking out a granular mixture for dividing and taking out a granular mixture mixed by a mixer without impairing its homogeneity. Regarding a processing device.

(Problems to be Solved by Conventional Techniques and Inventions) Conventionally, it has been required for various uses of the granular mixture that the particles are mixed in a mixer to have sufficient homogeneity after mixing.

For example, a granular mixture is a granular optical glass raw material (hereinafter,
In the case of (granular glass)), if the homogeneity of the granular glass after mixing is poor, striae occur in the glass molded product, and the optical performance such as the refractive index is deteriorated. Therefore, it is necessary to perform sufficient mixing so that the granular glass after mixing has complete homogeneity, and to adjust the mixing so that the refractive index of the granular glass after mixing becomes the target refractive index of the glass.

By the way, in order to take out a granular substance such as granular glass from a mixer, it has been conventionally performed to discharge it through an outlet provided in the lower part of the mixer. However, in this discharging operation, even if the granular materials are mixed so as to have sufficient homogeneity in the mixer, due to the difference in the particle size or the specific gravity of the granular materials, for example, the material having a large specific gravity is small. The phenomenon of so-called specific gravity separation occurs in which the substance flows out and is discharged before it.

 Here, an experimental example based on this phenomenon will be described.

The table below shows 100 kg of granular glass from the outlet at the bottom of the mixer.
It shows the deviation (Δn) from the reference value (target value) of the refractive index of the glass obtained by melting the sample discharged by 0 kg each.

From this table, it can be understood that the smaller the discharge order of the granular glass, the smaller the specific gravity, and as described above, the substance having the larger specific gravity is discharged first.

The refractive index of the granular glass after mixing is given by an average value detected from sampling of the granular glass. However, if the specific gravity separation occurs in the granular glass at the time of discharging as described above,
It becomes impossible to know the average value of the refractive index accurately.

The present invention has been made based on the above circumstances, in which a granular mixture homogenized by a mixer can be divided and taken out in a desired amount in a state where specific gravity separation does not occur, so that the divided portions are mutually separated. It is an object of the present invention to provide a method for dividing and taking out a granular mixture that ensures the same homogeneity, and a mixing processing apparatus therefor.

(Means for Solving the Problems) Therefore, in the present invention, a homogenized granular mixture is produced in the mixing container by introducing the granular mixture into the mixing container and rotating the mixing container. In the mixing process, after homogenization, the granular mixture is divided and taken out in a required amount from the upper layer side in the state of being accumulated in the mixing container.

Further, in the present invention, the granular mixture is put into a mixing container, and by rotating the mixing container, in a mixing process for producing a homogenized granular mixture in the mixing container,
After the homogenization, the granular mixture is divided into upper and lower layers or left and right layers in the state of being accumulated in the mixing container, and each divided layer is taken out.

Furthermore, in the present invention, in the mixing processing apparatus, the granular mixture is put into a mixing container, and the mixing container is rotated to generate a homogenized granular mixture in the mixing container. , A partition board insertion port is provided,
After the homogenization, the granular mixture, in the state of accumulation in the mixing container, a partition plate for dividing the granular mixture vertically or horizontally into a structure capable of being inserted into the mixing container from the partition plate insertion port. In addition, the mixing container is equipped with a discharge port corresponding to each divided region.

(Operation) According to such a dividing process, the granular mixture homogenized by the rotation of the mixing container is taken out in the accumulated state by means of, for example, a scoop or vacuum when the desired amount of divided mixture is taken out. Alternatively, after being divided into respective regions in the deposited state, they are respectively taken out, and the specific gravity separation that occurs in the mixing container when dividedly discharged by a desired amount by a flow as in the conventional case ( Since the drop from the one with a large specific gravity does not occur, each of the taken out parts obtained by the division has almost the same specific gravity (the average specific gravity of the total amount of the divided taken out parts, which is, for example, the refractive index of the optical glass. The specific gravity can be maintained.

(Example) Hereinafter, the Example of this invention is described, referring drawings.

FIG. 1 is a vertical sectional view of a mixer used in the first embodiment of the present invention.

FIG. 2 (a) is a vertical cross-sectional view of the mixer used in the second embodiment of the present invention in a state where the material to be mixed is not housed.

Fig. 2 (b) is a vertical cross-sectional view of only the container in a state where the material to be mixed of the mixer shown in Fig. 2 (a) is accommodated and the partition plate is attached.

FIG. 3 (a) is a vertical cross-sectional view of the mixer used in the third embodiment of the present invention in a state in which the material to be mixed is not housed.

FIG. 3 (b) is a vertical cross-sectional view of only the container in a state where the material to be mixed of the mixer shown in FIG. 3 (a) is accommodated and the partition plate is attached.

FIG. 4 (a) is a vertical cross-sectional view of the mixer used in the third embodiment of the present invention in a state in which the material to be mixed is not housed.

FIG. 4 (b) is a vertical cross-sectional view of the container of the mixer shown in FIG. 4 (a) in which the material to be mixed is accommodated and a partition plate is attached to bring the container upside down.

(First Embodiment) In FIG. 1, 10 is a W-type mixer, which comprises a sample inlet 12, a mixing container 11 having this inlet and an outlet 14 at a target position, and this container. An electric motor (not shown) for rotating the rotary shaft 13 is provided, and the switch 15 is used to start and stop the electric motor.

Using this mixer 10, for example, a granular optical glass raw material 19
For mixing, 100 kg of optical glass raw material 19 (about 40% of the filling amount in the mixing container 11) is charged from the charging port 12 of the mixer 10, and the charging port 12 is closed, and then the mixer 10 is turned on. about
Spin for 25 minutes to complete mixing.

Next, the charging port 12 is opened, and the glass raw materials 19 are sequentially taken out in layers in a predetermined amount from the top of the mixed glass raw materials using a scoop, a vacuum or the like (not shown).

According to such a take-out method, the mixed glass raw material 19 does not flow toward the discharge port 14 and specific gravity separation due to the flow of the granular mixture does not occur, so that the homogeneity of the glass raw material 19 after mixing is almost equal. Is kept constant. Therefore, the refractive index of the molded product of the glass raw material 19 taken out in layers for each predetermined amount can have a substantially constant value.

Further, according to the present example, since the homogeneity of the entire mixed glass raw material is not lost, for example, the refractive index of a molded product made by sampling a fixed amount from the uppermost layer is used as a representative value. Can be used as the average value of the refractive index of the glass raw material.

 By the way, the experimental results of this example will be described.

In the table below, 100 kg of glass raw materials were mixed, and 20 kg of each of these layers was taken out and each sample was sampled from an arbitrary position in the upper layer of each layer so that the total amount would be 1 kg. The numerical values (× 10 ⁻⁵ ) obtained by making glass molded products and comparing the refractive index obtained from each molded product with the target refractive index are shown.

From this table, it can be understood that the refractive indexes of the glass raw materials in each layer are substantially the same by the above method, and the homogeneity of the entire glass raw material is constant.

Further, the refractive indices obtained by sampling from the respective layers are substantially the same, and the refractive index obtained by sampling in the first layer, that is, the uppermost layer in the mixer can be used as the average value of the refractive indices in the entire mixing container.

(Second Embodiment) As shown in FIGS. 2 (a) and 2 (b), the mixer 20 shown in this embodiment has a mixing container 21, a sample inlet 22, an outlet 24, a rotary shaft 23, and a switch 25. The electric motor and the like (not shown) as a drive source have the same configuration as that of the first embodiment.

However, in the present embodiment, the mixing container 21 is provided with partition plate insertion openings 27 through which the partition plates 28 can be attached and detached in layers in the horizontal direction at a predetermined capacity (for example, 20 kg each). This insertion port 27 can be closed during mixing so as not to hinder the mixing of glass raw materials, and after mixing, a partition plate 28 may be inserted to partition the mixed glass raw materials 29 into layers as described above. it can.

In order to mix the granular optical glass raw material using this mixer 20, the optical glass raw material is supplied from the charging port 22 of the mixer 21 in the same manner as in the first embodiment without the partition plate 28 being attached to the insertion port 27. 29 is, for example, 100 kg (the filling amount in the mixing container 21 is 40
%), Close the input port 22 and then close the mixer 20
Spin for 25 minutes to complete mixing.

Next, the partition plate 28 is inserted into the insertion port 27, the mixed glass raw material 29 is divided into layers of 20 kg each, the charging port 22 is opened, and the uppermost glass raw material 29 is first scooped from the charging port. Is taken out using a vacuum or the like. After completely removing the glass material of the uppermost layer, the partition plate 28 of the uppermost layer is extracted, then the glass material of the next layer is extracted in the same manner as above, and then the partition plate 28 of the layer is extracted, and this operation is performed. For the lower layer. However, the lowermost glass raw material may be taken out through the outlet 24. In this example, each layer (divided region) of the glass raw material is fluidized and discharged separately, but when viewed as the total amount of itself, there is no difference in specific gravity between the layers,
Therefore, uniformity can be ensured in the refractive index of the optical glass for each divided portion, which is divided by the desired amount.

Also in this example, since no flow occurs when the glass raw material of each layer is taken out, and specific gravity separation does not occur, the glass raw material for each layer has a certain homogeneity. Therefore, as for the average value of the glass raw material, a highly reliable value is obtained by sampling from the uppermost layer. It should be noted that the glass raw material in this embodiment can be taken out more easily than in the first embodiment because each layer is partitioned by partition plates.

(Third Embodiment) As shown in FIGS. 3 (a) and 3 (b), the mixer 30 shown in this embodiment divides the mixed glass raw material 39 into layers in the longitudinal direction for each predetermined volume. Is configured. Therefore, unlike the second embodiment, the partition plate insertion port 37 is provided in the vertical direction for each layer, and the partition plate 37 can be attached to and detached from this insertion port. In addition to the discharge port 34, the mixing container 31 is provided with a discharge port 36 for each layer. Other configurations are similar to those of the second embodiment.

In order to mix the granular optical glass raw material using the mixer 30, as in the second embodiment, 100 kg of the optical glass raw material is fed from the charging port 32 of the mixer 30 without the partition plate 37. (The filling amount in the mixing container 31 is about 40%), the input port 32 is closed, and then the mixer 30 is rotated for about 25 minutes to complete the mixing.

Next, a partition plate 38 is inserted into each insertion port 37 to divide the mixed glass raw material 39 into layers. Since the partition plate 38 of the present embodiment is configured to be vertically attached to each insertion port 37 from below the mixing container 31, as much as 40% of the glass container 39 of the mixing container 31 is partitioned as described above. It can be inserted into the height. Then, the outlet 34 or 36 of each layer is sequentially opened, and the mixed glass raw material 39 is discharged from each layer.

In this embodiment, unlike the second embodiment, since the partition plate 38 is provided vertically, the glass raw material after mixing is
39 can be discharged from the discharge ports 34 or 36 for all the layers, and the use of scoops or vacuums is unnecessary, so that the extraction work can be performed easily. However, as described above, since the partition plate 38 of the present embodiment opens the upper side of each layer after insertion, the glass raw material 39 may be taken out from each layer using a vacuum from the charging port 32.

In this example, each layer (divided region) of the glass raw material is separately fluidized and discharged, but when viewed as the total amount of itself, there is no difference in the specific gravities between the layers, and therefore the optical glass The refractive index can ensure uniformity.

Fourth Embodiment The mixer 40 of this embodiment is similar to the second and third embodiments in that the partition plate 47 can be inserted horizontally as shown in FIGS. 4 (a) and 4 (b). However, the present embodiment is different from the above embodiment in that the entire mixing container 41 is configured to be upside down. That is, the mixing container 41 can be rotated by the rotating shaft 43 for mixing, and the rotating mechanism 50 can invert the mixing container 41. When the mixing container 41 is inverted, the partition plate 47 is also inverted, and the layers divided by this partition plate are vertically divided. Further, the discharge port 44 for each layer is provided so that the glass raw material 49 can be discharged for each layer when the mixing container 41 is inverted.
Is provided.

In this embodiment, the glass raw materials 49 can be charged and mixed in the same manner as in the second and third embodiments. However, when the glass raw materials after mixing are taken out, the partition plate 48 is attached to each insertion port and then the mixing container 41. The glass raw material 49 is discharged from the discharge port 46 of each layer.

According to this embodiment, the glass raw material 49 of each layer is a partition plate.
In addition to being completely partitioned by 48, all layers can be discharged from the discharge port 46 when the glass raw material 49 is taken out.

In each of the above embodiments, the W-type mixer is used as the mixer, but the present invention is not limited to this, and a V-type mixer can also be used.

(Effects of the Invention) As described above, according to the present invention, in treating the granular mixture mixed in the mixer, the granular mixture after mixing is divided into layers and taken out. It is possible to prevent the specific gravity from being separated due to the discharge of the granular mixture in the existing mixer, and to keep the homogeneity of the granular mixture after mixing constant.

Further, since the homogeneity of the whole granular mixture after mixing is maintained, the refractive index of the molded product obtained by sampling from the arbitrary position of the uppermost layer is used as a representative value and this value can be used as the average value of the entire mixture. Therefore, the average value of the granular mixture can be accurately and easily obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a mixer used in the first embodiment of the present invention. FIG. 2 (a) is a vertical cross-sectional view of the mixer used in the second embodiment of the present invention in a state where the material to be mixed is not housed. Fig. 2 (b) is a vertical cross-sectional view of only the container in a state where the material to be mixed of the mixer shown in Fig. 2 (a) is accommodated and the partition plate is attached. FIG. 3 (a) is a vertical cross-sectional view of the mixer used in the third embodiment of the present invention in a state in which the material to be mixed is not housed. FIG. 3 (b) is a vertical cross-sectional view of only the container in a state where the material to be mixed of the mixer shown in FIG. 3 (a) is accommodated and the partition plate is attached. FIG. 4 (a) is a vertical cross-sectional view of the mixer used in the third embodiment of the present invention in a state in which the material to be mixed is not housed. FIG. 4 (b) is a vertical cross-sectional view of the container of the mixer shown in FIG. 4 (a) in which the material to be mixed is accommodated and a partition plate is attached to bring the container upside down. 10, 20, 30, 40 …… Mixer 11, 21, 31, 41 …… Mixing container 12, 22, 32, 42 …… Input port 16, 26, 36, 46 …… Discharge port 17, 27, 37, 47 …… Insertion port 18,28,38,48 …… Partition plate 19,29,39,49 …… Glass material 50 …… Rotating mechanism

Claims (4)

(57) [Claims] 1. In a mixing process for producing a homogenized granular mixture in the mixing container by introducing the granular mixture into the mixing container and rotating the mixing container, the granular material is homogenized after the homogenization. A method for dividing and taking out a granular mixture, wherein a required amount of the mixture is taken out from the upper layer side while being kept in the state of being accumulated in the mixing container. 2. In a mixing process for producing a homogenized granular mixture in the mixing container by introducing the granular mixture into the mixing container and rotating the mixing container, the granular material is homogenized and then granulated. A method for dividing and taking out a granular mixture, characterized in that the mixture is divided into layers in the vertical and horizontal directions in the state of being accumulated in the mixing container, and taken out for each division. 3. A mixing treatment apparatus for producing a homogenized granular mixture in the mixing container by charging the granular mixture into the mixing container and rotating the mixing container. A partition plate insertion port is provided, and after homogenization, the granular mixture is kept in the state of being accumulated in the mixing container, and a partition plate for dividing into layers vertically or horizontally from the partition plate insertion port. A mixing processing apparatus for a granular mixture, characterized in that the mixing container is configured to be inserted into the mixing container, and the mixing container is provided with an outlet corresponding to each divided region. 4. A mixing treatment apparatus in which a homogenized granular mixture is divided into upper and lower layers by the partition plate so that the discharge port corresponding to each divided region of the mixing container is displaced downward. The apparatus for mixing a granular mixture according to claim 3, wherein the apparatus has an inverted structure.