JP2005320075A - Screw type material supplying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correctly supply a particulate material by evenly supplying/discharging the particulate material from a supply port and preventing dripping of the particulate material from the supply port when rotation of a screw rotating/driving shaft is stopped. <P>SOLUTION: The screw type material supplying device comprises the screw rotating/driving shaft 3 equipped with a spiral material pay-out blade 4 and housed in a material supplying cylinder 5. A plurality of material separating blades 6 are provided at a distal end of the screw rotating/driving shaft 3 to project from the screw rotating/driving shaft 3 in the radial direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a screw-type material supply device such as a powder material such as a screw feeder, and more specifically, supplies a powder material or the like stored in a hopper to the next process such as a molding machine. The present invention relates to a screw-type material supply device.

  2. Description of the Related Art Conventionally, a screw-type material supply device is disposed at a lower end portion of a hopper for storing powder material and the like, a rod-shaped screw rotation drive shaft connected to a drive means, and a spiral projecting from the screw rotation drive shaft And a cylindrical material supply cylinder in which these are housed.

  When using the screw-type material supply device, if the screw rotation drive shaft is rotated, the granular material stored in the lower end of the hopper is advanced from the base end side of the material supply cylinder by the material feeding blade. The material is transferred to the side and eventually supplied from the supply port at the tip of the material supply cylinder to the next process such as a molding machine (see, for example, Patent Document 1).

On the other hand, if the rotation of the screw rotation drive shaft is stopped, the supply of the granular material is stopped.
JP 2002-308445 A

  However, when the powder material is supplied, that is, when the screw rotation drive shaft is rotating, the spiral material feeding blade is swirling the powder material in the circumferential direction of the material supply cylinder. The granular material is transferred to the tip side, but in the material supply cylinder, the powdered granular material becomes a lump after being positioned above the material supply cylinder. It is dropped and transported to the tip side while being swept up again in the circumferential direction, and then discharged and supplied from the supply port.

  Therefore, the granular material supplied and discharged from the supply port is discharged from the supply port in a so-called pulsated state, and there is a problem that the granular material cannot be supplied uniformly.

  On the other hand, when the supply of the granular material is stopped, that is, when the rotation of the screw rotation drive shaft is stopped, the powder fed immediately before being supplied is placed near the supply port of the material supply cylinder. The granular material is waiting in a state of being agglomerated at the tip of the material feeding blade.

  Therefore, if a slight vibration or the like occurs, the lump near the supply port collapses, and the collapsed powder material falls down from the supply port to a molding machine etc. There was a problem that the body material could not be supplied.

  In particular, the amount of the particulate material that hangs down is proportional to the diameter of the supply port of the material supply cylinder, and the larger the diameter, the more amount of sag.

  An object of the present invention is to solve such a problem. The powder material can be uniformly supplied and discharged from the supply port, and even if the rotation of the screw rotation drive shaft is stopped, the powder material is supplied from the supply port. Provided is a screw-type material supply device capable of preventing material from dripping and accurately supplying a granular material.

To achieve the above objective,
A screw-type material supply device according to claim 1 is a screw-type material supply device in which a screw rotation drive shaft provided with spiral material feeding blades is housed in a material supply cylinder, and a tip portion of the screw rotation drive shaft Further, the present invention is characterized in that a plurality of material dividing blades are projected in the radial direction from the screw rotation drive shaft.

  In this case, since the material dividing blade co-rotates with the screw rotation drive shaft, it does not become an obstacle at the time of supply and discharge of the granular material fed along with the rotation of the screw rotation drive shaft. Then, the supply port of the material supply cylinder is divided into small spaces that are partitioned.

  Therefore, since the granular material material fed to the tip of the material supply cylinder is divided into small spaces formed by these sections and discharged from the supply port, it can be supplied substantially uniformly without pulsation.

  In addition, when the rotation of the screw rotation drive shaft is stopped, since the granular material material fed near the supply port is divided and held for each small space, it is possible to reduce dripping as a lump. , Can supply an accurate amount of granular material.

  A screw-type material supply device according to a second aspect is the structure according to the first aspect, wherein the material supply tube is inclined and protruded so that a supply port formed at a tip is positioned upward.

  In this case, the material supply cylinder is inclined so that the supply port at the tip is positioned above the base end, so that the powder that has not been supplied from the supply port even when the rotation of the screw rotation drive shaft is stopped. It is possible to further prevent the granular material from falling down.

  A screw-type material supply device according to a third aspect of the present invention is the screw-type material supply device according to the first or second aspect, wherein the material dividing blade has a different number of blades and can be replaced with the screw rotation drive shaft.

  In this case, depending on the type of the granular material to be supplied, the supply amount per hour, etc., the material dividing blades having different numbers of blades can be replaced and used.

The present invention has the following effects.
According to the screw-type material supply device according to claim 1, the granular material material fed to the tip of the material supply cylinder is discharged from the supply port after being divided for each of the small spaces formed by these sections. It can be supplied almost uniformly without pulsation.

  In addition, when the rotation of the screw rotation drive shaft is stopped, since the granular material material fed out near the supply port is divided and held for each small space, drastically reducing dripping as a lump, An accurate amount of granular material can be supplied.

  According to the screw-type material supply device of the second aspect, the material supply cylinder is inclined so that the supply port at the distal end is positioned above the base end, so that the rotation of the screw rotation drive shaft is stopped. In addition, it is possible to further prevent the powder material not supplied from spilling from the supply port.

  According to the screw-type material supply device according to claim 3, the material dividing blades having different numbers of blades can be used in accordance with the type of the granular material to be supplied, the supply amount per hour, and the like.

  Hereinafter, the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic overall perspective view showing an embodiment of a screw-type material supply apparatus A according to the present invention, and FIG. 2 is a schematic longitudinal sectional view of FIG. 1 viewed from the side. FIG. 3 is a schematic cross-sectional view in which the main part of the present invention shown in FIGS. 1 and 2 is partially enlarged. FIG. 3 (a) is a tip portion of a screw rotation drive shaft provided with spiral material feeding blades. FIG. 3B is a partial cross-sectional view showing a tip portion in a state where the screw rotation drive shaft of FIG. 3A is accommodated in the material supply cylinder, and FIG. FIG. 3 is a front view of FIG. 3B viewed from the direction of the supply port.

  The screw-type material supply device A is disposed at the lower end portion of the hopper 1 that stores the powder material Z, and is connected to the drive means 2 and has a rod-shaped screw rotation drive shaft 3 that projects into the screw rotation drive shaft 3. It comprises a spiral material feed blade 4 provided and a cylindrical material supply cylinder 5 in which these are housed.

  Here, the particulate material Z means a powder, a granule, a fine thin piece, a short fiber piece, etc., and any material can be used as long as it can be supplied by the apparatus A. Then, the granular material for resin is used. Note that the powder material Z may be cement, lime, powder or granular food or food material such as food material Z.

  The hopper 1 includes various structures such as silos and storage tanks that can accommodate the granular material Z. The hopper 1 here has a cylindrical main body 12 with a material inlet 11 formed in the upper part. Are formed so that the granular material Z is accumulated at the lower end.

  In addition, as shown in FIG. 1 and FIG. 2, an openable / closable lid portion 13 for appropriately discharging the particulate material Z may be provided at the lower end of the hopper 1.

  A cylindrical material supply cylinder 5 communicated with the hopper 1 is integrally formed and protruded at an appropriate position at the lower end of the hopper 1, and a driving means 2 such as a rotary motor is installed at the base end thereof. On the other hand, the tip forms an open supply port 51.

  Here, the material supply cylinder 5 has a structure in which a supply port 51 formed at the distal end is inclined and protruded so as to be positioned above the base end, as shown in FIG.

  In the material supply cylinder 5 having such a structure, the screw rotation drive shaft 3 provided with the material feeding blade 4 is inserted.

  The screw rotation drive shaft 3 has a base end connected to a driving means 2 such as a rotary motor, extends in the longitudinal direction through the center of the material supply cylinder 5, and has a distal end extended to the vicinity of the supply port 51. It is rod-shaped and can be rotated as the driving means 2 rotates.

  Further, as shown in FIG. 3A, the screw rotation drive shaft 3 is provided with a material feeding blade 4 continuously formed in a spiral shape from the base end side toward the tip end side.

  As shown in FIG. 3 (b), the material feeding blade 4 is projected so as to slide on the inner wall surface of the material supply cylinder 5 and block the granular material material Z. Rotates with rotation.

  Therefore, when the screw rotation drive shaft 3 is rotated, the material feed blade 4 is also rotated along with this, and the powder fluid material Z disposed on the base end side of the material feed blade 4 is It is pushed out to the tip side by rotation, and is supplied and discharged from the supply port 51 at the tip.

  A plurality of material dividing blades 6 which are features of the present invention are provided at the tip of the screw rotation drive shaft 3 having such a structure.

  Specifically, as shown in FIG. 3C, the material dividing blade 6 has a radial direction around the screw rotation drive shaft 3 positioned at the tip of the screw rotation drive shaft 3, that is, a material supply. Projecting in the radial direction of the tube 5.

  Here, the material dividing blade 6 is exemplified by six plate members arranged at equal intervals in the circumferential direction. However, the material dividing blade 6 may be two or more.

  In addition, the material dividing blade 6 is illustrated in which the front and rear positions of the material dividing blade 6 are arranged in parallel and in the same direction as the screw rotation drive shaft 3, but the front and rear positions of the root are driven by screw rotation. It is also possible to provide it in parallel to the axis 3 and inclining in a different direction.

  Further, the blade shape of the material dividing blade 6 is not limited to a simple rectangular flat plate as shown in the figure, and may be formed in, for example, a trapezoidal shape or a semicircular shape.

  Furthermore, it is also conceivable that the material dividing blade 6 can be attached to and detached from the screw rotation drive shaft 3 so that a different number of blades can be replaced with the screw rotation drive shaft 3. It is also possible to replace and use the material dividing blades 6 having different numbers of blades according to the type, the supply amount per hour, and the like.

  As shown in FIG. 3C, the material dividing blade 6 formed in this way can partition and form the supply port 51 at the tip of the material supply cylinder 5 into six small spaces (R1 to R6). The granular material material Z fed out to the supply port 51 is held in a state of being divided for each of the small spaces (R1 to R6) in which these sections are formed.

  Specifically, the granular material material Z fed to the front end side of the material supply cylinder 5 is retained immediately before the material dividing blade 6 and is stirred by the rotating material dividing blade 6 while being agitated by a small space (R1). To R6) and is discharged from the supply port 51.

  Therefore, the particulate material Z discharged from the supply port 51 can be supplied uniformly without pulsation.

  Note that, by the stirring action of the material dividing blade 6, for example, even if the powder material Z is a mixed material of two or more kinds, the mixed material can be uniformly divided into the small spaces (R1 to R6).

  In addition, the granular material Z in the small spaces (R1 to R6) has increased contact surfaces due to the material dividing blades 6 and the inner walls of the material supply cylinder 5 and thus increases resistance. Therefore, when the rotation of the screw rotation drive shaft 3 is stopped, the granular material material Z fed out near the supply port 51 is prevented from dripping as a lump, and as a result, these small spaces (R1) The total amount of the granular material Z dripping from ~ R6) is drastically reduced compared to the amount of dripping when the material dividing blade 6 is not provided, so that an accurate amount of the granular material Z can be supplied. .

  As described above, according to the present invention, since the material dividing blade 6 rotates together with the screw rotation drive shaft 3, it is an obstacle at the time of supply and discharge of the granular material Z that is fed out as the screw rotation drive shaft 3 rotates. Further, the material dividing blade 6 is divided into small spaces (R1 to R6) in which the supply ports 51 of the material supply cylinder 5 are defined.

  Therefore, since the granular material material Z drawn out to the tip of the material supply cylinder 5 is divided into the small spaces (R1 to R6) formed by these sections and discharged from the supply port 51, it pulsates. And can be supplied substantially uniformly.

  Further, when the rotation of the screw rotation drive shaft 3 is stopped, the granular material material Z fed out in the vicinity of the supply port 51 is divided and held for each of the small spaces (R1 to R6), so that it becomes a lump. Therefore, the amount of powder material Z can be supplied in an accurate amount.

  INDUSTRIAL APPLICABILITY The present invention can be effectively used as a screw-type material supply device that can accurately supply a granular material.

BRIEF DESCRIPTION OF THE DRAWINGS It is the general | schematic whole perspective view which showed one Example of the screw type material supply apparatus A which concerns on this invention. It is a schematic longitudinal cross-sectional view of the state which looked at FIG. 1 from the side. FIG. 3 is a schematic cross-sectional view in which a main part of the present invention shown in FIGS. 1 and 2 is partially enlarged, and FIG. 3A is a portion showing a tip portion of a screw rotation drive shaft provided with a spiral material feeding blade. FIG. 3B is a perspective view, FIG. 3B is a partial cross-sectional view showing a tip portion of the state where the screw rotation drive shaft of FIG. 3A is accommodated in the material supply cylinder, and FIG. It is the front view which looked at b) from the direction of the supply port.

Explanation of symbols

A screw type material supply device Z powder material 1 hopper 2 drive means 3 screw rotation drive shaft 4 material feed blade 5 material supply cylinder 51 supply port 6 material dividing blade

Claims (3)

In the screw-type material supply device in which the screw rotation drive shaft provided with the spiral material feeding blade is accommodated in the material supply cylinder,
A screw-type material supply device, wherein a plurality of material dividing blades are projected from a distal end portion of the screw rotation drive shaft in a radial direction from the screw rotation drive shaft. In claim 1,
The material supply cylinder is a screw-type material supply device having a structure in which the supply port formed at the tip is inclined and protruded so as to be positioned above. In either claim 1 or 2,
A screw-type material supply device in which the material dividing blade is different in number of blades from the screw rotation drive shaft.

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