JPH0349655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blow plate cleaning device for a mold making machine.

[Conventional technology]

Residual sand in mold making work using self-hardening sand such as self-hardening sand or cold box sand will harden if left for a long time, and especially the remaining sand in the blow head and blow nozzle will become hard when the work is completed. It is necessary to clean and remove it as soon as possible.
Currently, residual sand accumulated on the blow plate removed from the blow head is removed and cleaned using a shovel, broom, air duster, etc.

[Problem to be solved by the invention]

However, it is impossible to remove and clean the residual sand inside the blow nozzle without using an air duster.
If there are multiple blow nozzles, blow nozzle 1
Cleaning each item with a duster gun is complicated and time consuming, and results in scattering of sand.

[Means to solve the problem]

In order to solve the various deficiencies of the conventional method as described above, the present inventor has succeeded in developing the automatic blow plate cleaning device for a mold making machine of the present invention as a result of various studies and experiments, and the gist of the present invention and The lifting frame 3 is equipped with a lifting cylinder 9, and the lifting frame 3 is equipped with a lifting cylinder 9.
A blow plate inverting frame 2 that is inverted about a fulcrum 2' provided at one end of the blow plate is mounted above the lifting frame 3, and a blow plate holding hook 10 is disposed on the blow plate inverting frame 2. A blow plate cleaning device for a mold making machine, comprising a reversing sand removal device and a blow nozzle automatic cleaning device equipped with a horizontally movable compressed air injection mechanism disposed opposite to the fulcrum 2' side. With this configuration, the remaining sand on the blow plate can be collected into the sand box below in a short time without any effort, and the blow plate cleaning plate surface can be used for cleaning a large number of blow nozzles. The present invention provides a blow plate cleaning device that can completely remove residual sand in one operation by using cleaning nozzles, etc. arranged corresponding to the blow nozzle installation position, and reduces the time required for cleaning the residual sand. This succeeded in shortening the time, improving the working environment, and saving labor.

FIG. 9 is a front view showing the arrangement position of an automatic blow plate cleaning device, which is a characteristic feature of the present invention, in a mold making machine.

As shown in FIG. 9, the blow plate reversing sand evacuation device is attached to a fixed frame 4 attached outside the machine frame below the standby position of the sand magazine 30. Further, the blow nozzle cleaning device is disposed opposite to the fulcrum 2' side of the reversing sand removal device. In FIG. 9, the main members of the mold making machine are all known mechanisms for this type of machine, and are as follows: 31 is a traversing truck, 32 is a sand replenishing device, 33 is a sand hopper, and 34 35 is a crimping cylinder, 35 is a blowing valve, 36 is an air tank for sand blowing, 37 is a cylinder for traversing the trolley, 38 is a gushing head, 39
is an extrusion/forming plate, 40 is an upper mold mounting cylinder,
41 is a lower mold mounting cylinder, 42 is a clamp cylinder, 43 is an upper mold, and 44 is a lower mold.

The characteristic configuration of the present invention will be explained in more detail based on the accompanying drawings.

1, 2, and 4 to 6 are partially sectional front views showing an example of the device of the present invention, and FIG. 3 is a side view thereof, and FIGS. 1 to 6 show its operating mode. They are illustrated in order.

In these drawings, reference numeral 1 denotes a blow plate, which is replaceably attached to the blow head 24 in a known manner.

〔Example〕

As shown in the figure, the blow plate reversing sand removal device of the present invention includes an inverting frame 2, an elevating frame 3, a fixed frame 4, an inverting cylinder 5, an elevating guide rod 6, and an elevating cylinder 9.
and a hook 10.

The reversing frame 2 is raised and lowered by the operation of the lifting cylinder 3, and the reversing frame 2 is moved up and down by the operation of the reversing cylinder 5, with the center being a fulcrum 2' provided at one end of the lifting frame 3 (on the side of the compressed air injection mechanism to be described later). The blow plate is pivoted so that it is rotated at an angle greater than the angle at which the sand on the blow plate falls, for example, 60° to 90°. Although the illustrated device shows an example in which the reversing cylinder 5 is attached to the connecting plate 6' of the elevating guide rod 6, the mounting position of the reversing cylinder is not limited to the above-mentioned position and may be placed in any desired position. can do.

The blow nozzle automatic cleaning device of the present invention mainly includes a blow plate cleaning plate 12, the cleaning plate extrusion cylinder 13, an air intake pipe 17, and a cleaning nozzle 1.
It consists of 8.

In the blow plate cleaning plate 2, a plurality of cleaning nozzles 18 corresponding to the blow nozzles 16 provided on the blow plate 2 are provided vertically on the blow plate cleaning plate 12, and in the illustrated example, the cleaning nozzles 18
A tip rubber 15 is fitted to the tip end of each.
The blow plate cleaning plate 12 is attached to the fixed frame 4'
The blow plate cleaning plate is fixed to the tip of the cylinder rod of the extrusion cylinder 13, and the guide rod 14 is
The mechanism is such that the blow plate cleaning plate 12 is moved forward and backward by sliding.

Further, in the drawing, 7 is a sand removal sheet provided on the fixed frame extension, and is provided directly below the inversion position of the inversion frame 2, and 8 is a sand removal box.

The automatic sand removal operation of the blow plate and the automatic cleaning of the blow nozzle by the apparatus of the present invention will be described below.

When cleaning the residual sand in the blow head 24, the blow plate 1 attached to the blow head 24 of the molding machine is used as shown in FIGS. 1 and 9.
In order to remove it from the molding machine, use the lifting cylinder 9.
is operated to raise the elevating frame 3 and the reversing frame 2, and bringing the reversing frame 2 into close contact with the lower surface of the blow plate 1. Next, the blow plate 1 is removed from the blow head 24 of the molding machine, placed on the reversing frame 2, and the blow plate presser hook cylinder 11 is activated.
The blow plate 1 is held by the reversing frame 2 using the blow plate holding hook 10.

From the state shown in Figure 1, the lifting cylinder 9 (third
(shown in the figure) and lowers the blow plate 1 to the blow plate cleaning position (shown in the second figure).
That is, as shown in FIG. 2, the remaining sand in the blow head 24 is placed on the upper surface of the blow plate 1 and taken out to the cleaning position. Next, when the reversing cylinder 5 is activated, the blow plate 1 held by the reversing frame 2 is reversed by 90 degrees as shown in FIG.
falls and is contained.

If only the sand on the blow plate is to be discharged, the sand can be sufficiently discharged even if the above-mentioned inversion is approximately 60 degrees.

Although the residual sand on the blow plate 1 is cleaned by the operation as described above, the cleaning of the residual sand in the blow nozzles 16 (usually plural) provided on the blow plate 1 is incomplete. Therefore, in the device of the present invention, the residual sand in the blow nozzle 16 is completely cleaned by the operation of the horizontally movable blow nozzle automatic cleaning device disposed opposite to the inverted blow plate 1. The aspect will be explained below.

When the blow plate cleaning plate extrusion cylinder 13 is operated from the state shown in FIG. 4 and compressed air is injected from the cleaning nozzle 18 (on which the tip rubber 15 is attached) while gradually advancing the cleaning plate 12, A small amount of residual sand adhering to one surface of the blow plate is also cleaned more completely by the jetted air. The cleaning plate 12 is further advanced to the state shown in FIG. 5, that is,
When the tip rubber 15 of the cleaning nozzle 18 is brought into close contact with each blow nozzle 16 of the blow plate 1 and jetting of compressed air is continued, the remaining sand in the blow nozzle 16 is quickly and quickly removed, as shown in the partially detailed sectional view of FIG. The sand is completely cleaned and removed and collected in the sand removal box 8.
In addition, in the case of a blow plate in which the position of the blow nozzle 16 is slightly different in this device, the cleaning nozzle mounting bolt hole 23 should be replaced with a long hole H as shown in FIG.
By doing this, the cleaning nozzle 18 can be slightly displaced to match the blow nozzle 16.

FIG. 7 is a partial sectional view showing another embodiment of the present invention in which a cleaning plate jacket 21 and a flexible plate 20 such as a rubber plate are attached to the contact surface with the blow plate instead of the cleaning nozzle as described above. Yes, 8th
The figure is a detailed partial cross-sectional view of FIG. 7. A cleaning plate jacket 21 communicating with the air intake pipe 17 is provided with an air dust hole 22 at the same position as the rubber plate 20. The operating method in this mode is the same as in the previous case, but with this configuration, even if the blow nozzle position is different, if the air dust hole 22 is additionally drilled, the position can be adjusted with bolts etc. as in the above-mentioned specific example. It is not necessary and can be used in common even in the case of blow plates with different arrangement (plurality) of blow nozzles 16.

Although not shown, the air circuit supplied to the cleaning nozzle 18 may be divided into a plurality of systems to sequentially clean the remaining sand in each section of the blow nozzle. That is, when there are a large number of blow nozzles 16, a large amount of air is required at the same time in order to simultaneously blow away the remaining sand in the nozzles 16. Therefore, the air pressure decreases greatly and the air jetting force becomes weak. Therefore, by sequentially supplying air to each section, efficient cleaning can be performed without weakening the jetting force.

〔Effect of the invention〕

Since the device of the present invention has the configuration as described in detail above, it is possible to completely clean the residual sand in the blow head and the blow nozzle automatically and in a short time, and there is no scattering of residual sand, so it is possible to completely clean the residual sand in the blow head and the blow nozzle. In terms of environmental improvement and labor saving, it is possible to achieve remarkable functions and effects that cannot be obtained with conventional methods.Furthermore, with the device of the present invention, it is possible to efficiently and quickly replace the blow plate associated with the replacement of the mold. It has the effect of

[Brief explanation of drawings]

1, 2, and 4 are partially sectional front views showing the order of removing sand on the blow plate in the device of the present invention, FIG. 3 is a side view of the state in FIG. 2, and FIGS. Figure 7 is a front view showing the blow nozzle being cleaned, Figure 6 is a detailed sectional view of the cleaning nozzle, Figure 8 is a detailed sectional view of the cleaning plate jacket, and Figure 9 is a front view showing the entire mold making machine. In the figure: 1 is a blow plate, 2 is an inversion frame, 3 is an elevating frame, 4 is a fixed frame, 5 is an inversion cylinder, 6
1 is a lifting guide rod, 7 is a sand removal chute, 8 is a sand removal box, 9 is a lifting cylinder, 10 is a blow plate presser hook, 11 is a cylinder for the presser hook,
12 is a blow plate cleaning plate, 13 is an extrusion cylinder for the cleaning plate, 14 is a guide rod, 15 is a tip rubber, 16 is a blow nozzle, 17 is an air intake pipe,
18 is a cleaning nozzle, 20 is a rubber plate, 21 is a cleaning plate jacket, and 22 is an air dust hole.

Claims (1)

[Scope of Claims] 1. A lift frame 3 equipped with a lift cylinder 9, and a blow plate reversing frame 2 that is inverted around a fulcrum 2' provided at one end of the lift frame 3, mounted above the lift frame 3. The blow plate reversing sand removal device has a blow plate holding hook 10 disposed on the blow plate reversing frame 2, and a horizontally movable compressed air injection mechanism disposed opposite to the fulcrum 2' side. A blow plate cleaning device for a mold making machine, characterized by having a blow nozzle automatic cleaning device. 2. Claim 1 in which the compressed air injection mechanism comprises a blow plate cleaning plate 12 in which one or more cleaning nozzles 18 each having a tip rubber 15 are vertically installed, and a cylinder 13 for driving the cleaning plate. A blow plate cleaning device for a mold making machine as described in 2. 3. The compressed air injection mechanism comprises a cleaning plate jacket 21 having a flexible member 20 on the air injection surface and having an air dust hole 22, and a cylinder 13 for driving the cleaning plate jacket. Blow plate cleaning device for mold making machines. 4. The blow plate cleaning device for a mold making machine according to claim 1, wherein the circuit for supplying air to the cleaning nozzle 18 is divided into a plurality of systems.