JP4922598B2 - Powder discharging device - Google Patents

Description

  The present invention relates to a granular material discharging apparatus capable of smoothly measuring and discharging granular materials such as synthetic resin raw materials while maintaining a vacuum state.

  Conventionally, a so-called rotary vane feeder has been known as a weighing / discharging device for weighing powder particles such as synthetic resin raw materials. This rotary vane feeder is a powder by rotating a rotating body having radial vanes. Since particles were weighed and discharged, the motor for rotating the rotating body had to be expensive so that the rotation angle of the output shaft could be controlled with high accuracy, and there was a disadvantage of high cost. . In addition, during the period from the inlet to the outlet of the casing, the granular material always stays (exists) between the vanes, and the granular material remaining in the rotary vane feeder must be discharged (cleaned). However, there was a drawback that the work was troublesome.

  Therefore, in order to eliminate such drawbacks, the present applicant has already filed an application for a slide-type weighing device for weighing and discharging powder particles such as synthetic resin raw materials, and an outline thereof is shown in FIG. 5 (for example, , See Patent Document 1).

  This granular material measuring device 100 has a substrate 101 having an inlet 111 and an outlet 121 penetrating in the vertical direction, and a through-hole 112 penetrating in the vertical direction provided on the lower surface of the substrate 101 so as to be horizontally movable. The slide plate 102 and the weighing container 103 having the edge of the upper end opening 113 fixed to the edge of the through hole 112 are provided.

  Here, the measuring container 103 is provided with a porous body 113 whose internal capacity can be varied and allows only the passage of gas, and the slide plate 102 has a position where the through-hole 112 is overlapped with the inlet 111 and an outlet 121. The inlet 111 is closed with the through-hole 112 overlapped with the outlet 121 while being movable between the overlapping positions.

  Then, when the through hole 112 of the slide plate 102 is overlapped with the inlet 111, the granular material P naturally falls from the upper hopper H, and the inside of the measuring container 103 is filled with the granular material P.

  Next, the slide plate 102 is slid by the driving means 104, and the through hole 112 is overlaid on the outlet 121 of the substrate 101.

  By this operation, the inlet 111 is closed, and at the same time, the powder P up to the upper end of the through hole 112 of the slide plate 102 is measured by the measuring container 103 and moved to the outlet 121 side.

Then, if air flows in from the porous body 113 and a flow of air toward a molding machine or the like (not shown) provided in front of the outlet 121 is generated, the granular material P in the measuring container 103 is discharged from the outlet 121. It rides on the flow of air and is pneumatically transported to the molding machine or the like (not shown), and then moves to a position where the through hole 113 of the slide plate 102 overlaps the inlet 111, and this is repeated thereafter.
Japanese Patent Application No. 2000-338504

  The slide-type powder particle measuring device 100 is excellent in that the powder particle P can be measured at a low cost, but when the powder particle P is measured, the hopper H and the measuring container 103 are in a vacuum state. However, it is desired to carry out weighing work.

  Here, the vacuum state means a state in which the inside of the measuring container 103 is evacuated by sucking air inside the hopper H and the measuring container 103 with a pump or the like.

  However, in this slide-type powder particle measuring apparatus 100, even if the powder P is supplied into the measurement container 103 with the hopper H in a vacuum state, the powder P in the measurement container 103 is discharged from the outlet. When pneumatically transporting from 121 to a molding machine or the like (not shown), the inside of the measuring container 103 is returned to the atmospheric state, and the weighing operation in a state where the vacuum state in the measuring container 103 is maintained is not performed. could not.

  In addition, the slide-type granular material measuring device 100 drops the granular material P from the hopper H into the measuring container 103 and then slides the slide plate 102 toward the outlet 121. The powder P remaining at the inlet 111 of the substrate 101 is caught in the upper end edge of the through hole 112 of the slide plate 102, and the slide plate 102 is moved while pulverizing the bite P. If the sliding operation is performed, a large load is applied to the driving unit 104 and a smooth sliding operation cannot be performed.

  The present invention aims to solve such a problem, and can measure and discharge the granular material while maintaining a vacuum state, and further prevents the granular material from being bitten and smoothly slides. Disclosed is a powder discharging apparatus capable of operation.

To achieve the above objective,
According to a first aspect of the present invention, there is provided a discharge device for a granular material, a vacuum hopper capable of storing and sealing the granular material, a material inlet communicating with a discharge outlet at a lower end of the vacuum hopper, and a predetermined horizontal direction from the material inlet. A substrate having a material outlet opened at intervals, a slide plate in which a lower surface of the substrate is slidable in a horizontal direction, and a through-hole penetrating in a vertical direction is formed, and a through-hole of the slide plate The upper end opening is fixed, a slide container that is horizontally moved in conjunction with the slide plate, and provided at the lower end of the slide container. and possible lid sealing the slide container, can exhaust the gas in the slide container communicates with the lid, and the air conditioning unit capable of intake or purge gas in the slide container, the slide plate Hole is provided with a driving means for horizontally moving the sliding plate between a position which polymerize position and the material outlet which polymerize said material inlet of said substrate, the material inlet and material outlet of said substrate The predetermined interval between the two is characterized in that the through hole of the slide plate is closed by the substrate .

  Here, the predetermined interval means a length at which the through hole of the slide plate is completely closed by the substrate.

Discharge device of the granular material is in accordance with claim 2, in claim 1, the material inlet of the substrate, it forms a discharge space in the opening edge below the material outlet side, said drive means, the discharge The slide plate can be positioned at a position where an angle of repose is formed at which the granular material does not flow into the through hole of the slide plate through the space.

The discharge device for granular material according to claim 3, in any one of claims 1 or 2, wherein the slide container, and characterized in that there is a adjustable structure the capacity for storing the granular material To do.

The present invention has the following effects.
According to the powder particle discharging apparatus according to claim 1, since the predetermined interval is provided without connecting the material inlet and the material outlet, the slide container is temporarily stopped at the position of the predetermined interval, and the slide container It is possible to communicate with the material inlet after the inside is evacuated.

  Therefore, while maintaining the vacuum state in the slide container, the powder particles from the vacuum hopper can be thrown into the slide container, and the powder particles in the vacuum hopper do not touch the atmosphere. It is possible to prevent oxidation of powder particles.

  In addition, since the powder particles in the vacuum hopper do not come into contact with the air, it is possible to prevent condensation on the surface of the powder particles due to temperature change or humidity change. It is also possible to prevent a measurement error due to moisture absorption.

  According to the powder particle discharging apparatus according to the second aspect, in addition to the effect of the first aspect, the substrate further forms a discharge space portion, and the slide plate is temporarily stopped at a position where the repose angle is generated. Therefore, it is possible to move the slide plate horizontally after reliably dropping the powder particles remaining in the discharge space into the through hole or the slide container.

  Therefore, it is possible to reliably prevent the powder particles from being caught between the through hole of the slide plate and the material inlet of the substrate, and the slide plate can be smoothly moved.

  According to the powder particle discharging apparatus according to the third aspect, since the capacity of the slide container is adjustable, the capacity of the slide container that can be measured can be easily adjusted according to the shape, amount, etc. of the powder particles to be measured. Can be adjusted.

  Hereinafter, the discharge apparatus of the granular material which concerns on this invention is demonstrated with drawing.

  Fig.1 (a) shows the general | schematic general view which looked at one Example of the discharge apparatus A of the granular material based on this invention from the front, FIG.1 (b) shows the use condition of Fig.1 (a) side. FIG. 2 is an enlarged cross-sectional view showing a main part of the present invention surrounded by a dotted line frame in FIG. 1.

  Here, the same number is attached | subjected to a common site | part, and the overlapping description is abbreviate | omitted.

  The granular material discharging apparatus A according to the present invention includes a vacuum hopper H that can store and seal the granular material P, a material inlet 11 that communicates with a discharge port H1 at the lower end of the vacuum hopper H, and a material inlet 11. A slide plate 2 having a substrate 1 having a material outlet 12 opened at a predetermined interval L in the horizontal direction and a bottom surface of the substrate 1 being slidable in the horizontal direction and having a through hole 21 penetrating in the vertical direction. And a slide container 3 having an upper end opening 3a fixed to the through hole 21 of the slide plate 2 and horizontally moved in conjunction with the slide plate 2, and at the lower end of the slide container 3, P includes a porous body 31 that can pass only gas without passing through, and a lid portion 32 that can seal the slide container 3, a pump that is connected to the lid portion 32 and can suck the gas in the slide container 3, and the like The air conditioning means 5 is provided.

  Hereinafter, each member will be described in detail.

  The vacuum hopper H includes a cylindrical container body H2 provided with a discharge port H1 narrowed toward the lower end, and an openable / closable lid H3 that seals the upper end of the container body H2. A window portion H4 shielded with glass or the like is provided at an appropriate place so that the internal state can be confirmed.

  At the lower end of the discharge port H1 of the vacuum hopper H, a substrate 1 having a material inlet 11 communicating with the discharge port H1 is provided.

  The substrate 1 is formed with a material outlet 12 having the same shape in the horizontal direction from the material inlet 11, and the material inlet 11 and the material outlet 12 form a predetermined interval L.

  Here, the predetermined interval L means a length by which the through hole 21 of the slide plate 2 is completely closed.

  Further, a side plate 13 extending downward is formed at both ends of the substrate 1, and a rail portion 14 that is recessed in the longitudinal direction is formed on the lower end inner surface of the side plate 13. The upper end of the slide container 3 is locked to the slide container 3 so that the slide container 3 can slide.

  A discharge pipe 12a connected to the material outlet 12 is connected to the material outlet 12, and the powder P is sucked from the material outlet 12 by a suction pump 12b provided in the discharge pipe 12a. The granular material P can be fed to a front resin molding machine (not shown) through 12a.

  Next, on the lower inner side of the substrate 1, there is provided a slide plate 2 in which the lower surface of the substrate 1 is slidable in the horizontal direction and a through hole 21 is formed through the vertical direction. The slide plate 2 is sandwiched between the lower surface of the substrate 1 and the upper end of the rail portion 14 so as to be slidable in the longitudinal direction of the substrate 1.

  The through hole 21 of the slide plate 2 is formed in substantially the same shape that can communicate with the material inlet 11 and the material outlet 12, and an existing drive means 4 is connected to the base end of the slide plate 2, and the drive means The sliding plate 2 can be moved in the longitudinal direction of the substrate 1 by the expansion and contraction operation 4.

  And the upper end opening 3a of the bottomed cylindrical slide container 3 whose upper side is opened is communicated and fixed to the through hole 21 of the slide plate 2, and the slide container 3 has a rail portion as described above. 14, the slide plate 2 is interlocked with the slide plate 2 so that it can move horizontally.

  At the lower end of the slide container 3 is provided with a porous body 31 that can pass only gas without passing the powder particles P, and is provided with a lid portion 32 that can seal the bottom of the slide container 3.

  In addition, a vent hole 33 is formed in the lid portion 32 and communicates with the vent hole 33 and is connected to an air adjusting means 5 capable of sucking or exhausting gas in the slide container 3.

  It should be noted that a sensor 34 that senses the storage amount of the granular material P stored in the slide container 3 is provided at an appropriate position of the slide container 3.

  Moreover, although the slide container 3 shown in the present embodiment shows a fixed capacity, for example, the upper end opening 3a of the slide container 3 and the through hole 21 of the slide plate 2 are screwed together, The slide lightweight container 3 is formed to be replaceable, or a connecting structure capable of expanding and contracting is provided in the middle of the slide container 3, and the capacity of the slide container 3 is set according to the shape, capacity, etc. of the granular material P to be weighed. An adjustable structure may be used.

  The granular material discharge | emission apparatus A based on this invention comprised as mentioned above acts as follows.

  3 (a) to 3 (c) are operation diagrams schematically showing the main part of the granular material discharging apparatus A according to the present invention.

  Here, FIG. 3A shows a supply position where the powder P is supplied from the vacuum hopper H to the slide container 3, and FIG. 3B shows the powder P discharged from the slide container 3. FIG. 3C shows a position where the through hole 21 of the slide plate 2 interlocked with the slide container 3 is completely closed and the inside of the slide container 3 is in a vacuum state.

  For convenience of drawing, only necessary portions are numbered, but other portions are the same as those in FIGS. 1 and 2 and are omitted.

  First, the lid body H3 of the vacuum hopper H is opened, and the granular material P is stored in the container body H2. Then, the lid body H3 is sealed, and the air in the vacuum hopper H is removed from the existing air conditioning means (not used). Degassed in the diagram) to create a vacuum.

  The vacuum hopper H may be a sealed simple container. In this case, the powder P may be stored in the sealed container using an existing vacuum transportation means.

  Next, when the slide plate 2 is moved and the through hole 21 is superposed on the material inlet 11 and the gas in the slide container 3 is exhausted by the air adjusting means 5, the lower end of the vacuum hopper H maintained in a vacuum state. From the discharge port H1 through the material inlet 11 and the through-hole 21, the granular material P in the vacuum hopper H falls, and the granular material P is sequentially stored in the slide container 3 (see FIG. 3A). ].

  When a predetermined amount of powder P is stored in the slide container 3, the sensor 34 detects this and moves the slide plate 2 toward the discharge outlet 12.

  Here, the sensor 34 only needs to be able to measure a predetermined amount of the granular material P, and uses an existing sensor or weight sensor.

  Even when the slide container 3 is moved for the first time, the powder P is stored in the slide container 3, and the sensor 34 measures a predetermined amount after adding the amount of the powder P. ing.

  Then, the movement of the slide plate 2 is stopped at the position where the through hole 21 of the slide plate 2 and the material outlet 12 overlap, and the air adjustment means 5 sucks the gas into the slide container 3 and operates the suction pump 12b. Then, a predetermined amount of the granular material P stored in the slide container 3 is all fed to the front resin molding machine (not shown) or the like through the discharge pipe 12a [see FIG. 3 (b). ].

  The suction pump 12b is required when the powder P is discharged. However, if the time (timing) until the next discharge is short, it may be operated at all times.

  Thus, after discharging the weighed granular material P in the slide container 3, the upper end opening 3 a of the slide container 3 is not communicated with the material inlet 11 of the substrate 1, in other words, the slide plate 2. If the through-hole 21 is horizontally moved to a position where it is completely closed within the predetermined interval L and temporarily stopped, and the air in the slide container 3 is exhausted by the air adjusting means 5, the inside of the slide container 3 is evacuated into the vacuum hopper H. The vacuum can be made in the same environment as the inside [see FIG. 3 (c). ].

  Then, after the inside of the slide container 3 is evacuated, the through hole 21 of the slide plate 2 is polymerized at the material inlet 11, and the granular material P is sequentially stored in the slide container 3 from the vacuum hopper H as described above. The process is repeated repeatedly until a necessary amount is fed to a resin molding machine (not shown) or the like [see FIG. ].

  In addition, when the upper end opening 3a of the slide container 3 reaches the material inlet 11, the inside of the slide container 3 moves horizontally at a speed that can be in a vacuum state under the same environment as the vacuum hopper H, or If the volume of the sealable slide container 3 is smaller than the volume of the vacuum hopper H, and the slide container 3 is at atmospheric pressure or directly connected to the vacuum hopper H, the pressure fluctuation hardly occurs. The slide container 3 may be horizontally moved continuously within the interval L without being temporarily stopped.

  As described above, according to the granular material discharging apparatus A according to the present invention, the predetermined interval L is formed without connecting the material inlet 11 and the material outlet 12, so that the slide container is formed at the position of the interval L. 3 is temporarily stopped, and the inside of the slide container 3 is brought into the same environment as the inside of the vacuum hopper H, and then can be communicated with the material inlet 11.

  Therefore, the powder container P from the vacuum hopper H can be put into the slide container 3 while keeping the vacuum state in the same environment as the inside of the vacuum hopper H at all times. Since the granular material P in the vacuum hopper H is not exposed to the atmosphere, the oxidation of the granular material P can be prevented.

  In addition, since the granular material P in the vacuum hopper H does not come into contact with the atmosphere, it is possible to prevent the surface of the granular material P from being dewed due to temperature change or humidity change. It is also possible to prevent measurement error due to moisture absorption.

  4 (a) to 4 (d) are operation diagrams schematically showing the main part of another embodiment of the granular material discharging apparatus A according to the present invention.

  Here, FIGS. 4 (a) and 3 (a), FIG. 4 (c) and FIG. 3 (b), FIG. 4 (d) and FIG. Is omitted.

  FIG. 4C shows an operation state that is a feature of the present embodiment, and shows a discharge position where the granular material P is discharged from the slide container 3. FIG. 3C shows a discharge space portion of the substrate 1. 6 shows an operation diagram at a position where an angle of repose θ where the granular material P does not flow is formed.

  In addition, the same number is attached | subjected to the site | part which is common in FIGS. 1-3, the description is abbreviate | omitted and it explains in full detail only about the characteristic of a present Example.

  As shown in FIG. 2, the powder particle discharging apparatus A has a discharge space portion 6 that is stepped down from the material inlet 11 of the substrate 1 below the opening edge on the material outlet 12 side (left side in the figure). And a predetermined amount of the granular material P is vacuum-stored in the slide container 3, and then the slide container 3 is horizontally moved toward the material outlet 12, and the powder is discharged into the discharge space 6. It is characterized in that it temporarily stops at a position where the angle of repose θ where the particles P do not flow is formed.

  Here, only the substantially lower half of the opening edge on the material outlet 12 side in the material inlet 11 is expanded to form a stepped portion, thereby forming the discharge space portion 6.

  If such a discharge space portion 6 is formed, after a predetermined amount of the powder P is vacuum-stored in the slide container 3 shown in FIG. 4A, the slide container 3 is directed toward the material outlet 12 side. When horizontally moved, as shown in the enlarged view surrounded by the dotted line in FIG. 4B, the granular material P penetrates at a position before the through hole 21 of the slide plate 2 is completely closed by the substrate 1. A position where a repose angle θ that does not flow into the hole 21 is formed occurs.

  In this embodiment, the slide plate 2 is temporarily stopped at the position where the repose angle θ is formed, and after a few seconds, the slide plate 2 is moved toward the material outlet 12 side.

  Therefore, when the slide plate 2 is temporarily stopped, the powder P in the middle of dropping remaining in the discharge space portion 6 is all dropped into the through-hole 21 through the discharge space portion 6. 2 is moved toward the discharge outlet 12, the movement can reliably prevent the powder P from being caught between the discharge space 6 of the substrate 1 and the through hole 21 of the slide plate 2. .

  The slide plate 2 is smoothly moved to the discharge outlet 12 without biting the powder P, and the powder P in the slide container 3 is discharged through the discharge outlet 12 in the manner described above. It is.

  Thus, according to the powder particle discharging apparatus A according to the present invention, the discharge space portion 6 is formed and the slide plate 2 is temporarily stopped at the position where the repose angle θ is generated. The slide plate 2 can be moved horizontally after the remaining powder P is reliably dropped into the through hole 2 or the slide container 3.

  Therefore, the inside of the slide container 3 can always be kept in a vacuum state, and the powder body can be reliably prevented from being caught between the through hole 21 of the slide plate 2 and the material inlet 11 of the substrate 1. The smooth movement of the slide plate 2 can also be executed.

  The structure in which the discharge space 6 described in the present embodiment is formed and the slide plate 2 is temporarily stopped at the position where the angle of repose θ is formed to prevent the powder P from being bitten is a slide container. It is also possible to apply to a conventional apparatus in which the inside of 3 is not maintained in a vacuum state.

The schematic whole view which looked at one Example of the discharge apparatus A of the granular material which concerns on this invention from the front is shown, FIG.1 (b) is the schematic whole view which looked at the use condition of Fig.1 (a) from the side. is there. It is the expanded sectional view which showed the principal part of this invention enclosed with the dotted-line frame of FIG. (A)-(c) is the operation | movement figure which outlined the principal part of the discharge apparatus A of the granular material which concerns on this invention. (A)-(d) is the operation | movement figure which outlined the principal part which shows the other Example of the discharge apparatus A of the granular material which concerns on this invention. It is the expanded sectional view which showed the principal part of the conventional measuring device by a slide type.

Explanation of symbols

A A granular material discharging device H A vacuum hopper H1 A discharge port L A predetermined interval P A granular material 1 A substrate 11 A material inlet 12 A material outlet 2 A slide plate 21 A through hole 3 A slide container 3a An upper end opening 31 A porous body 32 A lid portion 5 An air adjusting means 6 discharge space

Claims (3)

A vacuum hopper capable of storing and sealing powder particles;
A substrate having a material inlet communicated with a discharge port at the lower end of the vacuum hopper, and a material outlet opened at a predetermined interval in the horizontal direction from the material inlet;
A slide plate in which a lower surface of the substrate is slidable in a horizontal direction and a through hole penetrating in a vertical direction is opened;
An upper end opening is fixed to the through hole of the slide plate, and a slide container that is horizontally moved in conjunction with the slide plate;
A lid that is provided at the lower end of the slide container, and includes a porous body that allows only gas to flow without passing through the powder particles, and can seal the slide container;
An air adjusting means communicated with the lid portion and capable of exhausting the gas in the slide container and capable of sucking or purging the gas into the slide container ;
Drive means for horizontally moving the slide plate between a position where the through hole of the slide plate overlaps the material inlet of the substrate and a position where the through hole overlaps the material outlet;
Equipped with a,
The granular material discharging apparatus according to claim 1, wherein the predetermined interval between the material inlet and the material outlet of the substrate is an interval at which the through hole of the slide plate is closed by the substrate . In claim 1,
In the material inlet of the substrate, a discharge space is formed below the opening edge on the material outlet side,
The drive means is capable of positioning the slide plate at a position where an angle of repose where the powder does not flow into the through hole of the slide plate through the discharge space is formed. Discharge device. In any one of claims 1 or 2,
The slide container has a structure capable of adjusting a capacity for storing powder particles, and the discharge device for powder particles.

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