JP2000074559A - Centrifugal dewatering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a positive removal of moisture left in a bag-like recess of a work-piece by a simple and less-expensive facility. SOLUTION: There are provided a work-piece holding table 1 supported on a rotating shaft 4 and rotated by it and an air blow nozzle 8 for applying air blow against a work-piece A mounted on this work-piece holding table 1. A driving motor 7 for rotating the rotating shaft 4 is controlled by an inverter and at the same time a position setting sensor 9 and a stopper 10 are placed near the rotating shaft 4 and then the stopper 10 is removably engaged with the rotating shaft 4 in response to a signal attained from the position setting sensor 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, immersing a die-cast product in a cooling water tank for the purpose of cooling, or immersing it in a cleaning liquid for the purpose of cleaning after cutting or drilling. The present invention relates to a centrifugal dehydrator for removing and drying moisture from a product (work) having moisture on its surface.

[0002]

2. Description of the Related Art A centrifugal dewatering apparatus is known which removes moisture adhering to the surface of a work (hereinafter referred to as a work) by blowing air or hot air while rotating the work at a high speed to dry the work. . (For example, actual Kaihei 4
However, in such a conventional centrifugal dewatering apparatus, if a work has a bag-shaped concave portion such as a boss hole, the water that has entered the portion may remain without being completely removed. In order to remove moisture remaining in the bag-shaped recess, it is conceivable to intensively apply air blow to the bag-shaped recess to remove the water in the portion. It must be precisely facing the nozzle outlet.
However, in order for the bag-shaped concave portion of the work to accurately face the outlet of the air blow nozzle installed in a fixed state, the work that has been rotating at high speed must be accurately stopped at a fixed position. In this case, if an expensive AC servomotor or the like is used as a power source for rotating the work, it is relatively easy, but there is a problem that the apparatus becomes expensive.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and uses a simple and inexpensive equipment to accurately adjust a bag-shaped concave portion of a work with respect to an outlet of an air blow nozzle. It is an object of the present invention to provide a centrifugal dewatering device that can be stopped at a position, and as a result, can surely remove moisture remaining in a bag-shaped concave portion of a work.

[0004]

A centrifugal dehydrator according to the present invention that achieves the above object provides an air blow to a work holder supported by a rotating shaft and rotating and a work mounted on the work holder. A centrifugal dehydrator having an air blow nozzle for controlling a drive motor for rotating the rotary shaft with an inverter, and facing a positioning sensor and a stopper to the rotary shaft, and The above-mentioned stopper is configured to be detachably engaged with the rotary shaft by a signal.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. The work support table 1 is for mounting a work (a product to be dried) A thereon in a fixed manner, and a dehydration / drying chamber 3 formed on an upper part of the machine frame 2.
And is horizontally supported by a rotating shaft 4 arranged from the lower part of the machine frame 2 toward the dehydration / drying chamber 3.

The rotating shaft 4 is vertically rotatably mounted on the machine frame 2 supporting the dehydration / drying chamber 3, and its upper end is projected into the dehydration / drying chamber 3 so as to be connected to the work support table 1. The pulley 5 is attached to the middle part, and the transmission belt 6 is hung on the pulley 5 to be connected to the driving motor 7.

An inexpensive general-purpose motor such as an AC motor is used as a drive motor 7 for rotating the rotating shaft 4.
The rotation speed and the like are controlled by an inverter method.

Further, a positioning sensor 9 and a stopper 10 are provided on the rotating shaft 4 so that the bag-shaped recess A 'of the work A can be stopped at a precise position with respect to the outlet 8a of the air blow nozzle 8. The stopper 10 is detachably engaged with the rotating shaft 4 by a signal from the positioning sensor 9. Specifically, a position detecting / stopping member 11 formed in a substantially disk shape is attached to a halfway portion of the rotating shaft 4, and the positioning sensor 9 and the stopper 10 face the peripheral surface of the position detecting / stopping member 6. At the same time, on the peripheral surface portion of the position detecting / stopping member 6, an engagement recess 13 is formed in which the sensing portion 12 sensed by the positioning sensor 9 and the stopper 10 are detachably engaged. Stopper 1 by signal
Numeral 0 is configured to engage with the engaging concave portion 13 of the position detecting / stopping member 11 so as to be releasably engageable and stop the rotation of the rotating shaft 4.

At this time, for example, an inexpensive proximity sensor can be used as the positioning sensor 9, and the stopper 10 is compatible with the engaging recess 13 of the position detecting and stopping member 11 attached to the rotating shaft 4. For example, it is formed in a substantially wedge shape, and is attached to the tip of the rod 10a of the air or hydraulic cylinder 14 to move forward and backward.

The air blow nozzle 8 is mounted on the work holding table 1.
This is for giving an air blow to the work A loaded on the upper side, and its outlet 8a is arranged at a predetermined position in the dehydration / drying chamber 3 toward the work A mounted on the work holding table 1. You. At this time, the (air outlet 8a of) the air blow nozzle 8 may be fixedly installed with respect to the work A mounted on the work holding table 1, or may be installed so as to be able to move forward and backward.

To remove and dry the moisture from the work (dry product) A having moisture adhered to the surface, the work A is set on the work support table 1 in a fixed state. The drive motor 7 is operated to rotate the work A in the horizontal direction at a high speed, and at the same time, air or hot air is blown from the outlet 8 a of the air blow nozzle 8 toward the work A. Then, the water adhering to the surface of the work A is centrifugally separated and air-blown at the same time, and quickly dried.

However, in the case where moisture remains in the bag-shaped concave portion A 'of the work A, the positioning sensor 9 is set in advance so that the positioning sensor 9 operates when the rotating shaft 4 reaches a predetermined rotational speed. The drive motor 7 is controlled by an inverter to reduce the rotation of the rotating shaft 4. Thus, when the rotation shaft 4 is decelerated to a predetermined speed and the positioning sensor 9 operates, the air or hydraulic cylinder 14 operates according to a signal from the positioning sensor 9, and the stopper 10 moves into the engagement recess 13 of the position detection / stop member 11. The rotation of the rotating shaft 4 is stopped by the engagement. Then, the work support 1 stops at a predetermined position, and the work A mounted on the work support 1 is stopped.
The bag-shaped recess A ′ of the air blow nozzle 8 accurately faces the outlet 8 a at the determined position. In this state, the outlet 8 of the air blow nozzle 8
If air or hot air is blown from “a” toward the bag-shaped recess A ′ of the work A, moisture remaining in the bag-shaped recess A ′ of the work A is reliably removed.

[0013]

As described above, the centrifugal dehydrator according to the present invention controls the driving motor for rotating the rotating shaft by the inverter, and faces the positioning sensor and the stopper to the rotating shaft. Since the stopper is configured to be detachably engaged with the rotating shaft by a signal, without using an expensive servomotor,
With simple and inexpensive equipment, the bag-shaped recess of the work can be stopped at a precise position with respect to the outlet of the air blow nozzle, and as a result, moisture remaining in the bag-shaped recess of the work can be reduced. The removal can be performed in a timely and reliable manner. In other words, an inexpensive general-purpose motor such as an AC motor can be used as the driving motor, and the rotation speed of the rotating shaft is appropriately set according to the sensitivity of the positioning sensor by controlling the rotation of the driving motor with an inverter. As a result, the bag-shaped concave portion of the work can be stopped at a precise position with respect to the outlet of the air blow nozzle.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing one embodiment of the present invention.

FIG. 2 is a perspective view of a main part.

[Explanation of symbols]

A: Work A ': Bag-shaped recess 1: Work support base 2: Machine frame 3: Dehydration / drying chamber 4: Rotary shaft 5: Pulley 6: Transmission belt 7: Driving motor 8: Air blow nozzle 9: Positioning sensor 10: Stopper 11: Position detection / stop member 12: Sensing unit 13: Engaging unit 14: Air or hydraulic cylinder

Claims (1)

[Claims] 1. A centrifugal dehydrator having a work holder supported by a rotating shaft and rotating, and an air blow nozzle for applying air blow to a work mounted on the work holder, wherein the rotating shaft is rotated. A drive motor for controlling the rotation is controlled by an inverter, and a positioning sensor and a stopper face the rotating shaft, and the stopper is detachably engaged with the rotating shaft by a signal from the positioning sensor. A centrifugal dehydrator characterized by the following.