JP2573716B2 - Powder supply unit - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powdery and granular material supply apparatus provided with a spirally-driven spiral body in a cylindrical body.

2. Description of the Related Art Conventionally, as a powder and granular material supply device, a rotationally driven helical body is arranged in a longitudinal direction in a cylindrical body, and the spiral state is rotated to supply the powder to the base end of the cylindrical body. A spring feeder which conveys the powdered material toward its tip is well known.

For example, as shown in FIG. 2, when pouring a molten metal into a rotating metal frame of a centrifugal casting apparatus, such an inoculant supply apparatus for adding an inoculant such as ferrosilicon to the molten metal also has such a configuration. A spring feeder is used.

In FIG. 2, reference numeral 11 denotes a supply device for an inoculant, which is inserted into a rotating metal frame 10 together with a pouring gutter (not shown) at the time of pouring the molten metal. 13 is arranged in the longitudinal direction, and a supply port 14 is formed in the lower part of the peripheral surface of the distal end portion of the cylindrical body 12.

In such a case, when an inoculum is supplied to the base end portion of the cylinder 12 and the spiral state 13 is driven to rotate, the inoculum is
Of the rotating metal frame 10 from the supply port 14.
The inoculant can be added to the molten metal that is supplied by being dropped into the inside of the mold and poured into the inner surface of the rotating metal frame 10. Pouring gutter and cylinder 12
Performs pouring and supply of the inoculant while integrally moving backward after being inserted to the back side of the rotating metal frame 10. As a result, the molten metal to which the inoculant is evenly added is poured over the entire inner surface of the rotating metal frame 10, and the tube 20 is cast.

However, in the configuration of the conventional inoculant supply device 11 as described above, the inoculum conveyed toward the distal end of the cylindrical body 12 is supplied to the supply port 14 at the distal end of the cylindrical body. , The inoculum cannot be supplied to the tip of the cylindrical body 12 or to the front thereof. Therefore, the inoculant cannot be sufficiently added to the molten metal supplied for the receiving portion 21 formed on the inner side of the rotating metal frame 10 in the tubular body 20, which may cause a casting defect. There is a point.

Therefore, an object of the present invention is to solve such a problem and to be able to supply the granular material to the front end portion of the cylindrical body or to the front thereof.

Means for Solving the Problems The present invention for achieving the above object provides a rotary-driven powder or granular material inside a cylindrical body having a supply port formed on a peripheral surface of a distal end portion, from a base end portion to a distal end portion. A helical body for conveyance is arranged, an air pipe is arranged along the cylindrical body, and the air pipe is opened toward the tip side of the cylindrical body near the supply port in the cylindrical body, At the tip of the cylindrical body, an inclined guide surface for guiding the air flow from the opening of the air pipe obliquely downward from the tip of the supply port is provided, and the powder and granules are blown out by the gas ejected from the opening. It is configured so that it can be sprayed toward the lower side in front of the supply port.

According to such a configuration, the spiral body is rotationally driven while supplying the granular material to the base end of the cylindrical body, thereby conveying the granular material toward the distal end of the cylindrical body to supply the granular material to the supply port. Can be fed down from below. Also, when supplying the granular material to the front end portion or forward of the cylindrical body, the gas conveyed to the vicinity of the supply port is blown downward from the supply port by ejecting gas from the air pipe. It can be supplied by spraying diagonally.

Embodiment 1 In FIG. 1, reference numeral 1 denotes an apparatus for supplying a granular material such as an inoculant, which rotates together with a pouring gutter (not shown) when pouring a molten metal into an inner surface of a rotating metal frame 10 of a centrifugal casting apparatus. It is inserted into the metal frame 10. Inside the cylindrical body 2, a rotationally driven hollow coil-shaped helical body 3 is arranged from the base end to the distal end. A supply port 4 is opened in a lower part of the peripheral surface of the distal end portion of the cylindrical body 2. An air pipe 5 is provided at the axial center of the cylindrical body 2 from the base end to the distal end by utilizing the internal space of the spiral body 3 having a hollow coil shape. An opening 5a is provided at the tip of the air pipe 5 at a position near the supply port 4.
Is formed, and the base end of the air pipe 5 is connected to a high-pressure air source or an inert gas source (not shown). The distal end of the cylindrical body 2 is closed by a closing member 6. The closing member 6 has an inclined guide surface for guiding air particles from the opening 5 a of the air pipe 5 obliquely downward from the leading end of the supply port 4. 6a is formed.

In such a configuration, when the inoculant is supplied at the base end of the cylinder 2 and the spiral body 3 is driven to rotate, the inoculant is
Of the rotating metal frame 10 from the supply port 4.
It is supplied to the inside of the container. When supplying the inoculant to a position ahead of the supply port 4 of the cylindrical body 2, high-pressure air is supplied to the air pipe 5 and ejected from the opening 5 a. Then, the inoculum conveyed to the vicinity of the supply port 4 is scattered and supplied forward.

The pouring operation will be described in detail. After the pouring gutter and the supply device 1 for the granular material are inserted to the inner side of the rotating metal frame 10, the pouring is performed while the pouring gutter and the cylinder 2 are retracted. And supply of inoculants. At this time, generally, the receiving portion 21 of the tubular body 20 is formed at the back of the rotating metal frame 10, but the tubular body 2 of the supply device 1 of the granular material can be inserted deeper than a certain position. Since the supply of the inoculant from the supply port 4 by the spiral 3 is further impossible, the inoculant is added to the molten metal forming the receptacle 21 only by the operation of the spiral 3 Can not do it.

Therefore, by injecting air from the opening 5a of the air pipe 5, the inoculant can be added to the receiving portion 21 without fail. When the pouring into the receiving portion 21 is completed, the air supply to the air pipe 5 is stopped thereafter, and the inoculant is dropped and supplied from the supply port 4 only by the rotation in the spiral state 3, so that the influence of the air flow is eliminated.

By the supply operation of the inoculant described above, even at the time of pouring into the receiving portion 21 of the pipe 20 to be cast, the inoculant can be reliably added to the molten metal poured into the inner surface of the rotating metal frame 10, The inoculant can be uniformly added to the molten metal over the entire length of the tube 20, and the tube 20 without casting defects can be obtained.

Advantageous Effects of the Invention As described above, according to the present invention, by supplying the granular material to the base end portion of the cylindrical body and rotating and driving the spiral state,
The powder can be conveyed to the tip of the cylinder and supplied downward from the supply port, and when supplying the powder to the tip of the cylinder or ahead of it, gas is supplied from the air pipe. By pressure feeding, the powder and granules conveyed in the vicinity of the supply port can be supplied obliquely from the supply port toward the lower front side by the action of the inclined guide surface. By the ejection, the granules can be sprayed over a relatively wide front lower area, and the sprinkled granules can be prevented from being aggregated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a granular material supply apparatus according to one embodiment of the present invention, and FIG. 2 is a sectional view of a conventional granular material supply apparatus. 1 ... powder and granular material supply device, 2 ... cylindrical body, 3 ... spiral body, 4 ... supply port, 5 ... air piping.

Claims (1)

(57) [Claims] A helical body for rotating and driving powder and granular material is disposed from a base portion to a front end portion of a cylindrical body having a supply port formed in a peripheral surface of the front end portion. An air pipe is disposed along the air pipe, and the air pipe is opened toward the distal end of the cylindrical body in the vicinity of the supply port in the cylindrical body, and the distal end of the cylindrical body is opened from the opening of the air pipe. An inclined guide surface that guides the air flow obliquely downward from the tip of the supply port is provided so that the powder fluid can be sprayed toward the lower side in front of the supply port by gas ejected from the opening. A powder fluid supply device, characterized in that: