JP4951019B2 - Powder cleaning equipment - Google Patents

Description

  The present invention relates to a powder cleaning apparatus for removing dust from a mixture of powder and dust.

When molding a resin, usually, a resin particle as a raw material is melted and molded by a method such as injection molding or extrusion molding.
Examples of the resin particles include those processed into a shape such as powder and pellets by a method such as pulverization. In such a granular material, fine powder generated by pulverization or the like, and dust such as impurities mixed when the granular material is transported are mixed. These dusts affect the finished product.

  Therefore, as an apparatus for removing dust, for example, a first air cleaning deck, a vertical venturi region, and a second air cleaning deck are sequentially provided from the upstream side toward the downstream side in the transportation direction of the particulate matter. And the dust remover in which the introduction side ventilation hole and the discharge side ventilation hole are provided so that the 2nd air washing deck may be pinched | interposed is proposed (for example, refer patent document 1).

According to this dust remover, first, in the first air cleaning deck, the particulate matter passes through the holes (holes and slots) of the first air cleaning deck from the introduction side ventilation holes, and flows through the discharge side ventilation holes. Purified.
Thereafter, when the vertical venturi area is dropped, the air is further purified by the air flow blowing up the vertical venturi area.

  Finally, in the second air cleaning deck, as in the case of the first air cleaning deck, purification is performed by the airflow that passes through the holes of the second air cleaning deck from the introduction side ventilation holes and blows through to the discharge side ventilation holes.

US Pat. No. 5,033,331

However, in the dust remover described in Patent Document 1 described above, two types of holes (hole and slot) are mixed in the first air cleaning deck and the second air cleaning deck.
The hole generates an air flow that separates dust from the granular material, and the slot generates an air flow that accelerates the granular material toward the deflecting plate. That is, the holes and the slots generate airflows in different directions.

Therefore, in the first air cleaning deck and the second air cleaning deck, airflows in different directions may interfere with each other and turbulence may occur. In that case, the dust once separated from the particulate matter is attached to the particulate matter again by turbulent flow, and there is a problem that the dust cannot be removed efficiently.
Then, this invention is providing the granular material washing | cleaning apparatus which can remove dust efficiently from the mixture of a granular material and dust.

In order to solve the above-mentioned problem, the invention described in claim 1 is a granular material cleaning apparatus that removes the dust from the mixture while transporting the mixture of the granular material and the dust, and transporting the mixture is inclined such transport direction downstream side end portion of the mixture with respect to the upstream side end portion is disposed below the first guide member for guiding the transportation of said mixture, said mixture of said first guide member Continuing downstream of the transport direction of the mixture, the transport direction downstream end is provided so as to be disposed below the transport direction upstream end of the mixture, and guides the transport of the mixture. a second guide member disposed opposite to the first guide member at the lower end, and a collision member that the mixture is a collision, placed on the opposite side of the collision member against the first guide member The first guide member and the second guide portion A first blower hand stage for generating an air flow towards the at the opposite side of the first blowing means with respect to the second guide member is disposed opposite an exhaust portion for discharging the airflow from the first blower unit to the outside A housing that houses the first guide member, the second guide member, the first air blowing means, and the exhaust part , wherein the first guide member causes an air flow from the first air blowing means to the collision. A first air flow control unit that controls the air flow toward the member, and the second guide member includes a second air flow control unit that controls the air flow of the first air blowing unit toward the exhaust unit. It is characterized by.

According to such a structure, the airflow which goes to a 1st guide member from a 1st ventilation means is controlled to go to a collision member by the 1st airflow control part of a 1st guide member. Moreover, the airflow which goes to a 2nd guide member from a 1st ventilation means is controlled so that it may go to an exhaust part by the 2nd airflow control part of a 2nd guide member.
That is, when the first air blowing means generates an air flow, only the air flow toward the collision member is generated in the first guide member, and only the air flow toward the exhaust portion is generated in the second guide member. ing.

Therefore, first, the mixture is guided to the first guide member and is collided with the collision member by the air flow toward the collision member. Thereby, the dust adhering to the granular material is physically peeled off.
Next, the mixture transported from the first guide member to the second guide member is guided by the second guide member and exposed to the airflow toward the exhaust section. Thereby, it isolate | separates into a comparatively light dust and a comparatively heavy granular material, and only dust is conveyed toward an exhaust part by an airflow.

As a result, the dust can be efficiently removed from the mixture of the granular material and the dust.
According to a second aspect of the present invention, in the first aspect of the present invention, the second guide member is inclined with a smaller inclination than the first guide member.

According to such a configuration, in the first guide member, if the collision member is provided so as to face the downstream end portion in the transport direction, the granular material is accelerated by the airflow and the inclination toward the collision member. It is possible to make it collide with the collision member with certainty.
Further, in the second guide member, the granular material can be exposed to the air flow toward the exhaust portion for a relatively long time while being transported relatively slowly due to the inclination with a smaller inclination than the first guide member. .

Therefore, in the 1st guide member, dust can be peeled off from a granular material more efficiently, and in a 2nd guide member, dust and a granular material can be separated more efficiently.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the invention is provided on the downstream side in the transport direction continuously to the second guide member in the casing, It is characterized by comprising a self-weight drop part that allows a fall, and a second air blower that is provided in the housing and generates an airflow in a direction opposite to the self-weight drop direction of the granular material.

According to such a structure, in the dead weight falling part, the granular material is exposed to the airflow which goes to the direction which opposes the dead weight fall direction generate | occur | produced by the 2nd ventilation means, falling with dead weight.
Therefore, the direction in which the granular material falls and the direction in which the removed dust is carried are opposite to each other.
As a result, the dust that could not be removed by the second guide member and the granular material can be further separated.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the dead weight dropping portion is slidably provided in a direction perpendicular to the dead weight falling direction, and an opening cross-sectional area of the dead weight falling portion is determined. It is characterized by having a movable wall that changes uniformly.
According to such a configuration, by sliding the movable wall, the opening cross-sectional area of the dead weight dropping portion can be changed uniformly.

Therefore, the air volume per unit cross-sectional area of the airflow passing through the opening cross-sectional area can be uniformly changed over the entire weight falling part by simply sliding the movable wall without changing the air volume from the second air blowing means. it can.
As a result, more efficient separation can be achieved.
According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the airflow from the second blower means is partially provided between the casing and the movable wall. And a first seal member that controls to pass between the movable wall and the movable wall.
According to such a structure, the clearance gap which allows the airflow from a 2nd ventilation means to pass between the housing | casing and a movable wall is formed, and a 1st seal member is partially provided in the clearance gap. ing.
Therefore, it is possible to control the airflow passing through the gap between the movable wall and the housing, and to prevent the accumulation of powder and dust in the gap.
As a result, dust can be removed more efficiently.
Further, the invention according to claim 6 is the invention according to any one of claims 3 to 5, wherein the first air blowing means and the second air blowing means are independently controlled in air flow rate. It is characterized by that.
According to such a configuration, the air flow can be easily controlled according to the type of the granular material or dust.
The invention described in Claim 7 is the invention according to any one of claims 1 to 6, wherein the exhaust unit, an exhaust port, an exhaust duct is provided so as to surround the periphery of the exhaust port, And it is provided in the said exhaust duct, While providing the passage of the said dust, it has the control member which controls the passage of the said granular material, It is characterized by the above-mentioned.

According to such a configuration, the exhaust port is surrounded by the exhaust duct, and the restricting member is provided in the exhaust duct.
Therefore, the dust separated from the granular material passes through the regulating member and is carried from the exhaust duct to the exhaust port by the airflow toward the exhaust section.
On the other hand, even if the granular material is carried toward the exhaust part by the air flow toward the exhaust part, the restricting member is restricted from entering the exhaust duct and the exhaust port.

As a result, it is possible to remove only dust from the exhaust part while leaving the powder particles.
The invention according to claim 8 is the invention according to claim 7, wherein the exhaust duct is provided between the exhaust duct and the casing so as to cover the exhaust outlet from below, and the exhaust duct and the casing are provided. It is characterized by comprising a second seal member that cuts off the airflow that passes between the body and toward the exhaust port.
According to such a configuration, for example, when the second air blowing means is disposed adjacent to the lower side of the exhaust duct, the air flows from the second air blowing means to the exhaust duct through the gap between the exhaust duct and the housing. The airflow can be blocked by the second seal member.
The invention described in Claim 9 is the invention according to any one of claims 1 to 8, with respect to the first guide member and / or the second guide member, it is disposed opposite from the top And a static eliminator for removing static electricity from the mixture.
According to such a structure, when a granular material and dust are tinged with static electricity, static electricity of a granular material and dust can be removed.

Therefore, even if where the powdery grains and dust are attracted to each other by static electricity, dust, Ru can be easily peeled off from the particulate material.

The invention of claim 10 is the invention according to any one of claims 1 stomach Shi 9, between the first guide member and the housing, and / or, said housing Partially provided between the second guide member and the air flow from the first air blowing means between the housing and the first guide member and between the housing and the second guide member. It is characterized by including a third seal member that controls to pass between the two .

According to such a configuration, a housing, between the first guide member and the second guide member has a gap for passing the first blower hand stage or these airflow is formed, the gap, partially third seal member that has been kicked set.

Therefore, it is possible to prevent the first guide member and the second guide member, and controls the air flow through the gap between the housing and the powder or granular material or dust will accumulate in the gap.

  As a result, dust can be removed more efficiently.

As described above, according to the first aspect, the dust can be efficiently removed from the mixture of the granular material and the dust.
Further, according to claim 2, in the first guide member, the dust can be more efficiently peeled off from the granular material, and in the second guide member, the dust and the granular material can be more efficiently separated. Can be separated.

Moreover, according to Claim 3, the dust which was not able to be removed in the 2nd guide member, and a granular material can be isolate | separated more.
Further, according to the fourth aspect, more efficient separation can be achieved.
Further, according to the fifth aspect, it is possible to prevent dust and dust from accumulating in the gap between the movable wall and the housing, and to remove dust more efficiently.
Moreover, according to Claim 6, according to the kind of granular material or dust, an airflow can be controlled easily.
According to the seventh aspect, only the dust can be removed from the exhaust part while the granular material remains.
According to the eighth aspect, the air current flowing through the gap between the exhaust duct and the housing can be blocked by the second seal member.

According to the ninth aspect, even when the powder and dust are adsorbed to each other by static electricity, the dust can be easily peeled off from the powder.
According to the tenth aspect , it is possible to prevent dust and dust from accumulating in the gap between the first guide member and the second guide member and the housing, and to remove dust more efficiently. .

It is a front sectional view showing a washing machine as an example of the granular material washing apparatus of the present invention. It is the side view which looked at the 1st deck shown in FIG. 1 from the A direction. It is the side view which looked at the 2nd deck shown in FIG. 1 from the B direction.

FIG. 1 is a front sectional view showing a cleaning machine as an example of the granular material cleaning apparatus of the present invention. FIG. 2 is a side view of the first deck shown in FIG. 1 as viewed from the A direction. FIG. 3 is a side view of the second deck shown in FIG. 1 as viewed from the B direction. 1 to 3, when referring to the direction, the direction arrow shown in each figure is used as a reference.
As shown in FIG. 1, the cleaning machine 1 is a device that removes dust from a mixture while transporting a mixture of powder and dust from above to below, and a casing 2 as an example of a housing, The material introduction member 3 for introducing the mixture into the casing 2 and the material discharge member 4 for receiving the granular material from which the dust has been removed are provided.

The casing 2 is formed in a substantially box shape whose lower side is opened, and a material supply port 15 and three static elimination needle insertion holes 16 are formed through the upper wall of the casing 2.
The material supply port 15 is formed in a substantially circular shape in plan view on the left side of the casing 2.
The static elimination needle insertion holes 16 are arranged at an interval of about 120 ° from each other so as to surround the periphery of the material supply port 15 in a plan view.

Further, in the casing 2, a transport member 5 for guiding the transport of the mixture, a first air introduction port 8 as an example of the first air blowing means, a collision member 6, an exhaust part 10, a movable wall 7, and a second air blowing means. A second air introduction port 9 as an example and a static elimination needle 41 as an example of three static elimination devices are provided.
The transport member 5 is disposed on the left side in the casing 2 and is formed in a substantially U shape with the left side open. The upper end portion of the transport member 5 is screwed to the left inner surface of the casing 2, and the lower end portion of the transport member 5 is screwed to the left inner surface of the material discharge member 4. Further, the length of the transport member 5 in the front-rear direction is substantially the same as the length in the front-rear direction of the inner space of the casing 2, and the rear end of the transport member 5 contacts the rear inner surface of the casing 2 and the material discharge member 4. The front end is in contact with the casing 2 and the front inner surface of the material discharge member 4.

The transport member 5 includes a first deck 11 as an example of a first guide member, a second deck 12 as an example of a second guide member, a vertical portion 13, and a fixing portion 14.
The first deck 11 is provided at an upper end portion of the transport member 5 so as to be inclined so that the right end portion is disposed below the left end portion.
Further, as shown in FIG. 2, the first deck 11 is formed in a substantially rectangular flat plate shape, a plurality of punch holes 20 are formed in the upper end portion thereof, and a first ventilation port 21 is formed in the lower end portion thereof. Is formed.

Each punch hole 20 is a round hole, and is arranged in parallel at intervals in the front-rear direction and the up-down direction.
The first ventilation port 21 is formed in a substantially rectangular shape over substantially the entire front-rear direction of the first deck 11. Further, a pair of front and rear support plates 23 and three airflow deflecting plates 22 as an example of the first airflow control unit are provided in the first ventilation port 21.

Both the support plates 23 are formed in a substantially rectangular shape in side view extending continuously downward from the first deck 11 at both front and rear end edges of the first ventilation port 21.
Each airflow deflecting plate 22 is formed to have a length in the front-rear direction that is substantially the same as the length in the front-rear direction of the first ventilation port 21.
Each airflow deflecting plate 22 includes a substantially rectangular deflecting portion 24 extending in the front-rear direction and a supported portion 25 having a substantially rectangular shape in side view extending downward from both front and rear edges of the deflecting portion 24. I have.

In addition, each airflow deflecting plate 22 is fixed to the first deck 11 so that the supported portion 25 is screwed to the supporting plate 23 and is inclined downward as it goes rightward. (See FIG. 1).
Accordingly, the airflow deflecting plates 22 are arranged in parallel at intervals in the vertical direction so that the deflecting portions 24 are substantially parallel to each other. Specifically, each airflow deflecting plate 22 has an upper end portion (upstream end portion in the transport direction) closing the first ventilation port 21 and a lower end portion (downstream end portion in the transport direction) opening the first ventilation port 21. Are arranged in an inclined manner. In addition, each airflow deflecting plate 22 completely covers the first ventilation port 21 when projected from above.

Each airflow deflecting plate 22 is always screwed in such a way that it cannot rotate relative to the first deck 11. However, the airflow deflecting plate 22 can be swung with respect to the first deck 11 by loosening the screw, thereby Can be adjusted.
As shown in FIG. 1, the second deck 12 is arranged below the first deck 11 continuously from the lower end of the first deck 11, and has a smaller inclination (with respect to the horizontal direction) than the first deck 11. And an acute angle side inclination angle) so that the right end portion is disposed below the left end portion.

The second deck 12 is formed in a substantially rectangular flat plate shape as shown in FIG. The second deck 12 has a second ventilation hole 26 formed therein.
The second ventilation opening 26 is formed in a substantially rectangular shape over substantially the entire front-rear direction of the second deck 12. A punching metal 27 as an example of a second airflow control unit is provided in the second ventilation opening 26.

The punching metal 27 is formed in a substantially rectangular flat plate shape in which both end portions in the front-rear direction are bent upward. In addition, the length in the front-rear direction and the length in the up-down direction of the punching metal 27 are formed to be approximately the same as the length in the front-rear direction and the length in the vertical direction of the second vent hole 26.
The punching metal 27 is formed with an infinite number of substantially regular hexagonal punch holes 28.

Each punch hole 28 is formed in a size such that the powder particles do not pass through it, and are arranged in a staggered manner at intervals.
And the punching metal 27 is being fixed to the 2nd deck 12 so that the 2nd ventilation port 26 may be coat | covered by screwing the both ends of the front-back direction.
As shown in FIG. 1, the vertical portion 13 is disposed below the second deck 12 continuously from the lower end portion of the second deck 12, and is provided along the vertical direction (vertical direction). The vertical portion 13 is formed in a flat plate shape without an opening.

The fixing part 14 is arranged below the vertical part 13 continuously from the lower end part of the vertical part 13, and is inclined so that the left end part is arranged below the right end part. Further, the left end portion of the fixing portion 14 is screwed to the left inner surface of the material discharge member 4.
The first air inlet 8 is disposed in a region defined by the transport member 5, the left wall of the casing 2, and the left wall of the material discharge member 4 in a front view. That is, the first air introduction port 8 is disposed obliquely to the left of the first deck 11 and the second deck 12. Further, the first air introduction port 8 is formed in a circular shape in front view so as to penetrate the rear wall of the casing 2. A blower (not shown) for sending air into the casing 2 is connected to the first air introduction port 8.

The collision member 6 is a flat plate extending obliquely downward to the left, and is disposed above the transport member 5 so as to face the first deck 11 with an interval.
The upper end portion of the collision member 6 is fixed to the upper wall of the casing 2 below the right end edge of the material supply port 15. Further, the lower end portion of the collision member 6 is bent obliquely downward to the right, and is disposed to face the first ventilation port 21 of the first deck 11 in the left-right direction.

The exhaust unit 10 is disposed on the upper right side of the casing 2 so as to be opposed to the second deck 12 with a space therebetween.
The exhaust unit 10 includes an exhaust port 31, an exhaust duct 32, and fins 33 as an example of a plurality of regulating members.
The exhaust port 31 is formed in a circular shape in front view so as to penetrate the rear wall of the casing 2 at the upper right side of the casing 2. A dust collecting member (not shown) is connected to the exhaust port 31 via an exhaust pipe (not shown).

The exhaust duct 32 is formed in a substantially L shape in sectional view. Specifically, the exhaust duct 32 includes a vertical portion extending along the vertical direction, an inclined portion extending continuously downward to the right continuously from the lower end portion of the vertical portion, and rightward continuously from the lower end portion of the inclined portion. It is formed from a horizontal portion that extends toward it.
The upper end portion of the exhaust duct 32 is screwed to the upper inner surface of the casing 2, and the right end portion of the exhaust duct 32 is screwed to the right inner surface of the casing 2. Accordingly, the exhaust duct 32 is provided so as to surround the exhaust port 31 together with the upper wall of the casing 2 and the right wall of the casing 2.

Further, the length of the exhaust duct 32 in the front-rear direction is formed to be approximately the same as the length of the inner space of the casing 2 in the front-rear direction. A third ventilation port 34 is formed in the vertical portion and the inclined portion of the exhaust duct 32.
The third ventilation port 34 is formed through the vertical portion and the inclined portion of the exhaust duct 32 in such a size as to cover almost all of the front-rear direction and the vertical direction.

The fins 33 are bent plates extending along the front-rear direction, and are formed in a substantially bowl shape in cross-section with the left end bent upward.
Further, the fins 33 are provided at the left end portion of the exhaust duct 32 so as to be arranged in parallel in the vertical direction with a space therebetween. The right end portion of each fin 33 is fixed to the left end portion of the exhaust duct 32. The left end portion of each fin 33 is located between the second ventilation port 26 and the third ventilation port 34 so as to cover almost all of the third ventilation port 34 in the direction from the second ventilation port 26 to the third ventilation port 34. Is arranged.

The movable wall 7 includes a wall member 35 and a pair of upper and lower support shafts 36.
The wall member 35 is a flat plate extending from the lower end portion of the exhaust duct 32 to the upper end portion of the material discharge member 4 along the vertical direction. The wall member 35 faces the vertical portion 13 of the transport member 5 in the left-right direction. The upper end portion of the wall member 35 is slidably in contact with the lower end portion of the exhaust duct 32. The wall member 35 together with the vertical portion 13 of the transport member 5 constitutes a dead weight dropping portion that allows the dead weight fall of the granular material.

The support shaft 36 has a thread formed on the outer peripheral surface thereof, and extends along the left-right direction. The left end portion of the support shaft 36 is fixed to the right end surface of the wall member 35 with a nut 38 via a washer 37. Further, the right end portion of the support shaft 36 is fixed to the right wall of the casing 2 with a nut 39 so as to penetrate the right wall of the casing 2.
As a result, the movable wall 7 is always fixed to the casing 2 and the wall member 35 can be slid in the left-right direction by loosening the nut 39 that fixes the right end of the support shaft 36. it can. The wall member 35 slides while maintaining the posture along the vertical direction, thereby uniformly changing the opening cross-sectional area of the weight dropping portion formed between the wall member 35 and the vertical portion 13.

Note that the wall member 35 of the movable wall 7 slides in a range on the left side of the left end edge of the second air introduction port 9 and on the right side of the right end edge of the vertical portion 13 in the front view.
The second air introduction port 9 has a substantially circular shape when viewed from the front, on the rear inner surface of the casing 2 so as to be disposed below the exhaust duct 32 and to the right of the wall member 35 of the movable wall 7 when viewed from the front. Is formed through. A blower (not shown) for sending air into the casing 2 is connected to the second air inlet 9 separately from the blower (not shown) of the first air inlet 8. Each blower (not shown) is controlled independently of each other. Thereby, the air volume from the 2nd air inlet 9 and the air volume from the 1st air inlet 8 are controlled mutually independently.

  Each static elimination needle 41 is formed in a needle shape from a conductive material such as metal, and is inserted through each static elimination needle insertion hole 16. Further, the tip of the left static elimination needle 41 is opposed to the upper end of the first deck 11 with a slight gap, and the tip of the right static elimination needle 41 is slightly spaced above the second deck 12. Oppositely arranged apart. Note that ion wind may be blown in place of the static elimination needle 41.

The material introduction member 3 is formed in a substantially cylindrical shape extending upward from the peripheral edge of the material supply port 15. A mixture of powder and dust is pneumatically transported to the material introduction member 3.
The material discharge member 4 is provided so as to continuously cover the lower part of the casing 2 continuously from the lower end of the casing 2. Further, the material discharge member 4 is formed in a substantially trapezoidal shape when viewed from the front, and the left and right side walls thereof are inclined so that the opening cross-sectional area decreases as it goes downward.

Hereinafter, the operation of the cleaning machine 1 will be described.
First, in order to clean the granular material using the cleaning machine 1, air is sent into the casing 2 from the first air introduction port 8 and the second air introduction port 9 to generate an air flow in the casing 2.
The air sent from the first air inlet 8 is in a space defined by the transport member 5, the left wall of the casing 2, the front wall of the casing 2, the rear wall of the casing 2, and the left wall of the material discharge member 4. It is introduced and blows out from the first ventilation port 21 and the second ventilation port 26. That is, the first air introduction port 8 generates an air flow toward the first ventilation port 21 and the second ventilation port 26.

  The air blown out from the first vent 21 is deflected downward by the airflow deflector 22 as it goes rightward. Since the lower end portion of the collision member 6 is disposed on the right side of the first ventilation port 21, the air blown from the first ventilation port 21 interferes with the lower end portion of the collision member 6. That is, the airflow deflecting plate 22 controls the airflow from the first ventilation port 21 toward the collision member 6.

On the other hand, the air blown out from the second vent 26 passes through the punch hole 28 of the punching metal 27 and blows up toward the exhaust part 10 obliquely to the upper right. That is, the punching metal 27 is controlled so that the airflow from the second ventilation opening 26 is directed to the exhaust unit 10.
The air sent from the second air inlet 9 is a space defined by the wall member 35, the horizontal portion of the exhaust duct 32, the right wall of the casing 2, the front wall of the casing 2, and the rear wall of the casing 2. In this case, it passes under the wall member 35 and passes between the vertical portion 13 and the wall member 35 from below. That is, the second air introduction port 9 generates an air flow that blows upward from below between the vertical portion 13 and the wall member 35.

The air blown out from the second ventilation port 26 and the air sent from the second air introduction port 9 are blown into the exhaust duct 32 from between the fins 33 and are exhausted to the outside through the exhaust port 31. That is, the exhaust unit 10 discharges the airflow from the first air introduction port 8 to the outside.
The air flow generated in the casing 2 is an air flow from the first vent 21 toward the collision member 6, an air flow from the second vent 26 to the exhaust unit 10, and between the vertical portion 13 and the wall member 35 from below. The airflow is roughly divided into three airflows that pass upward and flow toward the exhaust section 10.

Next, a mixture of powder and dust is introduced into the casing 2 through the material introduction member 3.
The mixture introduced into the casing 2 is first guided to the upper end of the first deck 11 by the collision member 6.
Then, the mixture is collided with the lower end portion of the collision member 6 while being accelerated obliquely downward to the right by the inclination of the first deck 11 and the airflow directed from the first ventilation port 21 toward the collision member 6. Thereby, the dust adhering to the granular material is physically peeled off.

Then, the mixture collided with the collision member 6 is guided to the upper end portion of the second deck 12.
Then, the mixture is exposed to the airflow from the second ventilation port 26 toward the exhaust unit 10. Thereby, it isolate | separates into a comparatively light dust and a comparatively heavy granular material.
At this time, when the weight of the granular material is exceptionally heavy with respect to the weight of the dust, only the dust is wound up by the air flow, carried toward the exhaust unit 10, and discharged to the outside.

On the other hand, if the weight of the powder is heavier than the weight of the dust, but the difference between the weight of the dust and the weight of the powder is relatively small, the powder and the powder are also rolled up by the air current. May end up.
In this case, relatively lighter dust follows the airflow than relatively heavy particles. Therefore, the dust flows from above the fins 33 together with the airflow, enters the exhaust duct 32, and is discharged to the outside from the exhaust port 31. On the other hand, since the granular material has low followability with respect to the airflow, it cannot enter the exhaust duct 32 around the fins 33 like dust, but collides with the fins 33 and falls downward. . That is, the fin 33 allows passage of dust into the exhaust duct 32 and restricts passage of particulate matter into the exhaust duct 32.

The mixture passing through the first deck 11 and the second deck 12 contacts the tip of the static elimination needle 41 during the passage. Thereby, when a granular material and dust are tinged with static electricity, static electricity of a granular material and dust is removed.
And the granular material isolate | separated from the dust in the 2nd deck 12 falls between the vertical part 13 and the movable wall 7 by dead weight toward the downward direction from upper direction.

At this time, the granular material passes between the vertical portion 13 and the wall member 35 from the lower side to the upper side and is exposed to the airflow toward the exhaust unit 10. That is, in the gravity drop part, the transport direction of the granular material and the airflow face each other.
Thereby, the dust which could not be removed in the second deck 12 and the granular material are separated, and the cleaning of the granular material is completed.

The cleaned granular material is collected by the material discharge member 4 and stored in a material tank (not shown). After that, the washed granular material is used for molding.
In the above-described embodiment, a gap is formed between the transport member 5, the exhaust duct 32 and the movable wall 7, and the front wall or the rear wall of the casing 2. At the position, a seal member S that restricts the passage of airflow is provided.

The seal member S is formed from a thin metal plate, for example. The sealing member S includes a horizontal portion of the exhaust duct 32, an upper end portion (upstream end portion in the transport direction) of the second deck 12, a lower end portion of the vertical portion 13 (downstream end portion in the transport direction), and left and right sides of the fixing portion 14. It is provided at the center in the direction and at the lower end of the wall member 35.
The seal member S (second seal member) provided in the horizontal portion of the exhaust duct 32 is arranged so that the right end portion thereof overlaps the right end portion of the exhaust duct 32 in a front view so as to cover the exhaust port 31 from below. The left end of the exhaust duct 32 is disposed so as to overlap the left end of the exhaust port 31 when projected in the vertical direction, and is provided at both ends in the front-rear direction of the horizontal portion of the exhaust duct 32.

The airflow from the second air inlet 9 is blocked by the seal member S provided in the horizontal portion of the exhaust duct 32.
The sealing member S (third sealing member) provided at the upper end of the second deck 12 is formed in a substantially rectangular shape in front view along the thickness direction of the second deck 12 (the direction toward the right as it goes upward) It is provided at both ends of the second deck 12 in the front-rear direction.

The seal member S provided at the lower end portion of the vertical portion 13 is formed in a substantially rectangular shape in front view along the thickness direction (left-right direction) of the vertical portion 13, and is provided at both ends in the front-rear direction of the vertical portion 13.
The sealing member S provided at substantially the center in the left-right direction of the fixed portion 14 is formed in a substantially rectangular shape in front view along the thickness direction of the fixed portion 14 (the direction toward the right as it goes downward). It is provided at both ends.

Part of the airflow from the first air introduction port 8 is caused by the sealing member S provided at the upper end portion of the second deck 12, the lower end portion of the vertical portion 13, and the substantially central portion of the fixing portion 14 in the left-right direction. It is controlled so as to pass uniformly between the front wall or the rear wall and the transport member 5.
The sealing member S (first sealing member) provided at the lower end of the wall member 35 is formed in a substantially rectangular shape in front view extending along the thickness direction (left-right direction) of the wall member 35, and both ends of the wall member 35 in the front-rear direction. Provided in the department.

A part of the airflow from the second air inlet 9 passes uniformly between the front wall or the rear wall of the casing 2 and the wall member 35 by the seal member S provided at the lower end of the wall member 35. Controlled.
In addition to the above, the seal member S is also provided between the left end portion of the first deck 11 and the left wall of the casing 2, and between the upper end portion of the wall member 35 and the lower end portion of the exhaust duct 32. It has been. Similar to the sealing member S described above, these sealing members S also control the airflow passing through the gap.

According to the cleaning machine 1, the airflow from the first air introduction port 8 toward the first deck 11 is controlled to be directed toward the collision member 6 by the airflow deflecting plate 22 of the first deck 11. Further, the airflow from the first air introduction port 8 toward the second deck 12 is controlled by the punching metal 27 of the second deck 12 so as to go to the exhaust unit 10.
That is, when the first air introduction port 8 generates an air flow, only the air flow directed toward the collision member 6 is generated in the first deck 11, and the air flow directed toward the exhaust unit 10 is generated in the second deck 12. Only has occurred.

Therefore, first, the mixture is guided to the first deck 11 and is collided with the collision member 6 by the airflow toward the collision member 6. Thereby, the dust adhering to the granular material is physically peeled off.
Next, the mixture transported from the first deck 11 to the second deck 12 is guided to the second deck 12 and exposed to the airflow toward the exhaust unit 10. Thereby, it isolate | separates into a comparatively light dust and a comparatively heavy granular material, and only dust is conveyed toward the exhaust part 10 by an airflow.

As a result, the dust can be efficiently removed from the mixture of the granular material and the dust.
Further, according to the washing machine 1, the collision member 6 is provided in the first deck 11 so as to face the first ventilation port 21. Therefore, the granular material can be accelerated by the airflow toward the collision member 6 and the inclination of the first deck 11, and can be reliably collided with the collision member 6.

In addition, the second deck 12 can be exposed to the airflow toward the exhaust section 10 for a relatively long time while transporting the granular material relatively slowly due to the inclination with a smaller inclination than the first deck 11. it can.
Therefore, in the 1st deck 11, dust can be peeled off from a granular material more efficiently, and in the 2nd deck 12, dust and a granular material can be isolate | separated more efficiently.

Moreover, according to this washing machine 1, in the dead weight fall part (the vertical part 13 of the transport member 5, the wall member 35 of the movable wall 7, and between them), while the granular material falls under its own weight, It is exposed to the airflow from below to above.
Therefore, the direction in which the granular material falls and the direction in which the removed dust is carried are opposite to each other.

As a result, the dust that could not be removed in the second deck 12 and the granular material can be further separated.
Moreover, according to this washing machine 1, by sliding the movable wall 7, it is possible to uniformly change the opening cross-sectional area of the dead weight dropping portion.
Therefore, by simply sliding the movable wall 7 without changing the air volume from the second deck 12, the air volume per unit cross-sectional area of the airflow passing through the opening cross-sectional area can be uniformly changed over the entire weight falling part. Can do.

As a result, more efficient separation can be achieved.
Further, according to the cleaning machine 1, the exhaust port 31 is surrounded by the exhaust duct 32, and the exhaust duct 32 is provided with a plurality of fins 33.
For this reason, the dust separated from the granular material is conveyed from the exhaust duct 32 to the exhaust port 31 by going around the fins 33 from above and entering the exhaust duct 32 by the air flow toward the exhaust unit 10.

On the other hand, even if the granular material is transported toward the exhaust unit 10 by the air flow toward the exhaust unit 10, it is restricted from entering the exhaust duct 32 and the exhaust port 31 by colliding with the fins 33.
As a result, it is possible to remove only the dust from the exhaust part 10 while leaving the powder particles.

Moreover, according to this washing machine 1, since the static elimination needle 41 is provided so as to oppose the first deck 11 and the second deck 12, when the granular material and the dust are charged with static electricity, The static electricity of the particles and dust can be removed.
Therefore, even if the powder and dust are adsorbed to each other by static electricity, the dust can be easily peeled off from the powder.

Moreover, according to this washing machine 1, the first air introduction port 8 and the second air introduction port 9 are independently controlled in the amount of blown air.
Therefore, the airflow can be easily controlled according to the type of the granular material or dust.
Further, according to the cleaning machine 1, the first air is provided between the front wall or the rear wall of the casing 2 and the first deck 11, the second deck 12, the exhaust duct 32, the vertical portion 13, and the wall member 35. A gap for allowing airflow from the inlet 8 and the second air inlet 9 to pass therethrough is formed, and the first deck 11, the second deck 12, the exhaust duct 32, the vertical portion 13, and the wall member 35 are arranged in the gap. A sealing member S is provided.

The seal member S controls the air flow from the first air introduction port 8 and the second air introduction port 9 toward the gap.
Therefore, the airflow flowing through the gap from the second air inlet 9 to the exhaust duct 32 can be blocked by the seal member S between the casing 2 and the exhaust duct 32.
Further, in the first deck 11, the second deck 12, the vertical portion 13 and the wall member 35, there is a space between the first deck 11, the second deck 12, the vertical portion 13 and the wall member 35 and the casing 2. Since the sealing member S is provided, the airflow passing through the gap between the first deck 11, the second deck 12, the vertical portion 13 and the wall member 35 and the casing 2 is controlled, and the casing in the vicinity of the gap and the gap. It is possible to prevent accumulation of powder and dust on the inner surface of 2 and the corners formed by the respective members in the vicinity of the gap.

In particular, in the dead weight falling portion, the dust falling by the dead weight between the vertical portion 13 and the wall member 35 enters the corner constituted by the vertical portion 13 and the wall member 35 and the front wall or the rear wall of the casing 2. There is a case. Since the dust that has entered the corner is difficult to ride on the airflow that blows upward between the vertical portion 13 and the wall member 35 from below, the dust may fall together with the granular material.
However, the air current passing through the gap between the vertical portion 13 and the wall member 35 and the casing 2 prevents the dust from entering the corner, so that the dust is passed between the vertical portion 13 and the wall member 35 from below. It can be put on an airflow that blows upward, and dust can be efficiently removed.

DESCRIPTION OF SYMBOLS 1 Washing machine 2 Casing 6 Colliding member 7 Movable wall 8 1st air introduction port 9 2nd air introduction port 10 Exhaust part 11 1st deck 12 2nd deck 13 Vertical part 22 Airflow deflector plate 27 Punching metal 31 Exhaust port 32 Exhaust duct 33 Fin 41 Static elimination needle S Seal member

Claims (10)

A granular material cleaning device for removing the dust from the mixture while transporting a mixture of the granular material and the dust,
The transport direction downstream side end portion of the mixture with respect to the transport direction upstream side end portion of the mixture is inclined so as to be disposed below a first guide member for guiding the transportation of the mixture,
Continuing downstream of the first guide member in the transport direction of the mixture, the first guide member is provided so as to be inclined so that the transport direction downstream end is disposed below the transport direction upstream end of the mixture. a second guide member for guiding the transportation of the mixture,
Disposed opposite to the first guide member at the lower end, and a collision member that the mixture is a collision,
They are placed on opposite sides of the collision member against the first guide member, a first blower hand stage for generating an air flow toward the first guide member and said second guide member,
An exhaust section that is disposed opposite to the second air guide member on the opposite side of the first air blowing means, and discharges the airflow from the first air blowing means to the outside ;
A housing for accommodating the first guide member, the second guide member, the first air blowing means, and the exhaust part ;
The first guide member includes a first airflow control unit that controls the airflow from the first air blowing unit so as to go to the collision member;
The granular material cleaning apparatus, wherein the second guide member includes a second air flow control unit that controls an air flow of the first air blowing unit toward the exhaust unit. The granular material cleaning apparatus according to claim 1, wherein the second guide member is inclined with a smaller inclination than the first guide member. A self-weight fall part that is provided downstream in the transport direction continuously to the second guide member in the housing, and allows the self-weight fall of the granular material, and
The granular material washing | cleaning apparatus of Claim 1 or 2 provided with the 2nd ventilation means provided in the said housing | casing and generating the airflow which goes to the direction facing the gravity fall direction of the said granular material.   The said self-weight fall part is provided slidably in the direction orthogonal to the self-weight fall direction, and is provided with the movable wall which changes the opening cross-sectional area of the self-weight fall part uniformly. Powder cleaning equipment. A first seal member is provided partially between the housing and the movable wall, and controls the airflow from the second air blowing means so as to pass between the housing and the movable wall. The granular material washing | cleaning apparatus of Claim 4 characterized by the above-mentioned. Wherein the first blowing means and second blowing means are each independently, characterized in that it is controlled blast volume, granular material cleaning device according to any one of claims 3 stomach Shi 5 . The exhaust part is
exhaust port,
An exhaust duct provided to surround the exhaust port, and
Wherein provided in the exhaust duct, while permitting passage of the dust, characterized in that it comprises a regulating member for regulating the passage of the powder or granular material, powder of any one of claims 1 to 6 Granule cleaning device. A second seal provided between the exhaust duct and the casing so as to cover the exhaust outlet from below, and blocking an airflow that passes between the exhaust duct and the casing and travels toward the exhaust outlet. The granular material washing | cleaning apparatus of Claim 7 provided with a member. With respect to the first guide member and / or the second guide member, is opposed from above, characterized in that it comprises a static eliminator for removing static electricity of said mixture, any one of claims 1 to 8 The granular material washing | cleaning apparatus as described in a term . The air flow from the first air blowing means is partially provided between the housing and the first guide member and / or between the housing and the second guide member. The third seal member that is controlled so as to pass between the first guide member and between the housing and the second guide member is provided. The granular material washing | cleaning apparatus as described in any one.

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