JPH0222139Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for automatically cleaning a mold used for casting metal ingots such as zinc.

[Problems to be solved by conventional techniques and ideas]

Normally, in this type of casting, the casting molds are placed in rows at predetermined intervals on a conveyor, and are periodically removed from the conveyor, and their inner surfaces are cleaned during use to remove slag, etc. In other words, keren (here, keren refers to mechanically or chemically treating the surface of an object to be painted to improve the adhesion and rust prevention effect of the paint, making it suitable for painting. In other words, fabric preparation (JIS corrosion prevention term Z0103) is carried out.At that time, sandblasting or so-called jet chisels equipped with a bundle of hard steel wires that reciprocate at high speed are used. In the past, workers had to manually clean the molds.

However, when using an abrasive machine such as sandblasting, there are problems such as the injection nozzle is easily clogged, and the powder particles used for blasting leak out from the seal with the outside and are scattered around. There is an inconvenience that the cleaning process itself takes an extremely long time, and if a jet chisel is used, dust such as slag removed from the mold may get into the eyes of the worker, or the jet chisel may This was an occupational health problem, as the vibration caused by the operation of the machine could induce diseases. Furthermore, in any of the above cases, each mold is once removed from the conveyor and then reattached to the conveyor during cleaning, making the work complicated and making it impossible to improve work efficiency.

In view of these circumstances, the present invention aims to provide an apparatus that can automatically and continuously clean each mold while it is attached to a conveyor.

[Means and actions for solving problems]

The automatic cleaning device according to the present invention includes a switch that detects a mold at a predetermined position on a conveyor, and a switch that can move automatic chisel means in vertical, horizontal, and front-back directions with respect to the surface of the mold to be cleaned. first, second, and third drive means, the drive means being interrelated and each having its operation controlled so as to sequentially reciprocate the chisel means over the entire surface of the mold. . Therefore, the entire inner surface of the mold positioned at a predetermined position on the conveyor can be automatically cleaned by the chisel means, and such cleaning operations can be performed sequentially and continuously. .

〔Example〕

1 to 4 show an embodiment of the apparatus according to the present invention, and in the figures, 1 is the position where the mold m to be cleaned is shown (hereinafter referred to as the cleaning position P).
a pair of automatic chisel means 3 held on the first holder block 2 so as to be perpendicular to the inner surface of the bottom thereof when positioned at the bottom thereof; The screw shaft is rotatably supported by the second holder block 4 via bearings 5 and 5' so that its axial direction is vertical, and 6 is a rotary rotor for detecting the rotation speed of the screw shaft 3 encoder,
7 is fixed to the second holder block 4, and by rotating the screw shaft 3 via bevel gears 8, 8', the first holder block 2 is moved in the vertical direction (y direction) along the shaft 3. A first movable drive means 9 is fixed to a third holder block 10 and moves the second holder block 4 in the left-right direction (x) with respect to the inner surface of the mold m.
A second drive means, 11, consisting of a hydraulic cylinder or the like, capable of sliding in the direction) is fixed to the frame 12 and moves the third holder block 10 relative to the mold m along a guide shaft 13 constituting the frame 12. A third driving means is composed of a hydraulic cylinder or the like that can be slid in the front-rear direction (z direction), and 14 is a conveyor c that is driven intermittently to sequentially transport the molds m.
This detection switch is composed of a rotary switch or the like disposed at an appropriate position in connection with the mold m, and can send out a detection signal indicating that the mold m is at the cleaning position P. As shown in FIGS. 1 and 2, the second and third drive means 9 and 11 are connected to hydraulic valves 16 and 1 by hydraulic pipes 15 and 15'.
6' to the hydraulic unit 17, and
The hydraulic valves 16, 16', the limit switches 18, 18' and 19, 19' for detecting the forward and backward ends of the second and third driving means 9 and 11, and the supply of compressed air to the chisel means 1, 1. The automatic valve 20 for controlling the supply, the rotary encoder 6, the first drive means 7 and the detection switch 14 are connected to a control circuit 21, which controls the chisel means 1.
is capable of performing a predetermined moving operation on the inner surface of the mold m to be etchant.

The device according to the present invention is constructed as described above, and when the start switch of the device is first turned on, each holder block 2, 4, 10 is returned to its original position, thereby moving the chisel means 1 to the clean position. Origin point p ₀ for mold m at P (see Figure 4)
It is positioned in At this time, the position of the mold m stopped at the cleaning position P is detected by the detection switch 1.
4, the third drive means 11 drives the third holder block to the forward end, so the chisel means 1 is moved directly from the origin _p0 in the z direction (position p( _x0 , y ₀ ), this starts the cleaning operation of the mold m.
Next, by the second driving means 9, the chisel means 1 moves from the position p (x ₀ , y ₀ ) to x while continuing the scraping operation.
At the rear end of the second drive means 9, the movement in the x direction is stopped (position p(x ₁ , y ₀ )), and the first drive means 7 moves the first holder block 2 (position p(x ₁ ,
_y1 )). Furthermore, the chisel means 1 are again connected to the second drive means 9
The chisel means is moved in the x direction from the position p (x ₁ , y ₁ ), and one reciprocating movement is performed (position p ₁ (x ₀ , y ₁ ).Hereinafter, such chisel means will be described. The reciprocating operation of step 1 is repeated in sequence, and when the position _po (x ₀ , _yo ) is reached, the entire inner surface of the mold m is smeared, and the third drive means 11 is retracted and the second drive means 7 by raising the first holder block 2 in the y direction to the position p ₀ (FIG. 4)
The means 1 is again returned to the origin p ₀ via . The cleaned mold m is on the conveyor c
When the next mold to be cleaned is positioned at the position P, the same cleaning operation as above is applied to the mold, and each mold is successively Keren is being held. Also, while the chisel means 1 reaches the position p o (x ₀ , y _o ) from the position _p (x ₀ , y ₀ ),
Raised lines m ₁ and m ₂ on the inner surface of mold m (see Figure 4)
is formed, when the pulse signal generated from the rotary encoder 6 according to the rotation speed of the screw shaft 3 reaches a predetermined value corresponding to the raised shapes m ₁ and m ₂ , the third drive Since the chisel means 1 is retracted by an appropriate amount by the means 11, the chisel means 1 can follow the shape of the inner surface of the mold m having such ridges m ₁ and m ₂ very precisely. In addition, if the hard steel wire of the chisel means 1 is worn out, the position of the second drive means 11 attached to the frame body 12 can be adjusted in the z direction by a manual handle or the like, so even in such a case, the chisel can be easily removed. There is no problem in operation.

According to this device, the cleaning work is performed automatically without manual intervention, which eliminates the conventional occupational health problems and eliminates complicated work such as attaching and removing molds to and from the conveyor. This eliminates the need for quick and reliable cleaning work.

It should be noted that the chisel means in the above embodiments may be any suitable commercially available chisel means, and the chisel means to be attached to the first holder block 2 may be selected depending on the size, shape, etc. of the mold m. The number can be chosen freely. Furthermore, instead of a chisel, a rotating wire brush, sandpaper, or the like may be attached to the holder block 2 as an attachment to finish the surface.

[Effect of idea]

As mentioned above, the automatic cleaning device according to the present invention has the following features:
This has advantages such as safety in cleaning work can be ensured and productivity can be improved.

[Brief explanation of the drawing]

Figures 1 to 3 are a plan view, a side view, and a front view showing the overall structure of the device according to the present invention, and Figure 4 explains the trajectory of the sharpening motion of the chisel means attached to the device. It is a diagram. 1... chisel means, 2, 4, 10... holder block, 7, 9, 11... drive means, c... conveyor, m... mold.

Claims (1)

[Scope of utility model registration request] means for detecting the position of the mold; automatic chisel means supported by a first holder block; and a screw shaft for moving the chisel means up and down with respect to the surface of the mold to be cleaned. a first drive means for rotating the chisel means; and a second drive means for moving the chisel means in the left-right direction via a second holder block that supports the chisel means and the first drive means. , comprising a third drive means for moving the chisel means in the front and back direction via a third holder block supporting the second drive means, each drive means moving the chisel means in the forward and backward direction. Automatic cleaning devices that are interconnected and controlled by control circuits to sequentially reciprocate over the entire surface of a mold to be cleaned.