JPS6141625B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a release agent spraying device for applying a release agent to a mold so that a casting can be easily removed from a casting mold in a die casting machine or the like.

Conventionally, this type of mold release agent spraying equipment required one mold release agent hose and one air hose for each nozzle, making it complicated and requiring a great deal of effort when replacing the nozzle. . Also, recently, there has been known a structure in which a hose and a nozzle are made into a block and attached to a distribution stand, as in Japanese Utility Model Publication No. 49-23233. However, even with this, it is necessary to replace each nozzle one by one, and each requires an independent air conduit and a release agent conduit, and the configuration of the spray machine that serves as the nozzle is complicated and large. This makes it difficult to uniformly coat molds with complex shapes or large molds.

There are also some that reduce the number of conduits and make the nozzles themselves removable, such as Utility Model Application No. 54-7213, but since there are usually a large number of nozzles, replacing all the nozzles is troublesome and time-consuming. However, the above-mentioned drawbacks cannot be overcome.

Furthermore, in the conventional method, after spraying, the mold release agent remains inside the nozzle or in its supply conduit, which causes the remaining mold release agent to fall from the nozzle and clog the conduit, making it impossible to use the next spraying smoothly. It was hot.

Therefore, the present invention can eliminate the above-mentioned drawbacks and problems, and the illustrated embodiments will be described below.

In the apparatus of this example shown in FIGS. 1 to 4, 1
A fixed leg is installed on a fixed die plate, and a rotary cylinder 2 is attached to the fixed leg 1 so as to be movable up and down. 3 is a mechanism for moving the base 4 back and forth, and is operated by rotating its handle 3a.
5 is a cylinder for raising and lowering the nozzle mounting base 6; 7 is a supply pipe for mold release agent fed from a pressure pump; 8 is a blowing air pipe for supplying compressed air from a compressor; 9
10 is a blow-off air pipe that supplies compressed air from the compressor via a switching valve, and 10 is a residue discharge pipe.
A mold release agent supply pipe 7 and a blowing air pipe 9 are connected to one side of the nozzle mount 6, and a mold release agent supply passage 6a communicates with these pipes 7 and 9 via a solenoid valve 11.
is formed (see Figure 3). Also, on the other side of the nozzle mount, there is a blowing air pipe 8 and a residual agent discharge pipe 10.
A blowing air passage 6b is connected to and communicates with them.
and a residual agent discharge path 6c are formed (see FIG. 4). Note that these passages 6a, 6b, and 6c are all opened in the mounting surface of the nozzle holder Sa of the nozzle unit S. The nozzle unit S consists of a nozzle holder Sa and multiple nozzles Sb, and the nozzle holder Sa has a mold release agent guide path Sc that connects the mold release agent supply path 6a and the residual agent discharge path 6c in the mounting base 6.
At the same time, an air guide path Sd communicating with the blowing air passage 6b is formed on the outer periphery of the guide path Sc.
Further, copper pipe conduits Se and Sn, which branch from the respective conduits Sc and Sd, are fixed to the lower part of the holder Sa to form a nozzle Sb (see Fig. 4). Then, a dovetail-shaped engagement groove 6d is formed in the lower part of the mounting surface of the nozzle mounting base 6, and a presser member 12 is fixed to the mounting base 6 with a bolt 14 through a washer 13 above the engagement groove 6d. There is. The presser member 12 is engaged with the mounting base 6 so as to move back and forth depending on the tightening state of the bolt 14, and a sloped surface 12a as shown in FIG. The engagement portion 6e has a shape. Therefore, the rear part of the holder Sa is formed into an inclined engagement mounting part Sm so that the holder Sa can be inserted along the engagement groove 6d and the engagement part 6e (see FIG. 3). Note that 15 is fixed to the mounting base 6 by a rod fixing joint of the cylinder 5. Reference numeral 16 denotes an O-ring that communicates the passage of the mounting base 6 with the passage of the holder Sa in a sealed state. 7 is a guide member equipped with a limit switch, and 18 is a limit switch for positioning up and down.

When using this example configured in this way, first loosen the bolt 14 to increase the distance between the engaging parts 6e, and then insert the mounting part Sm of the nozzle holder Sa into the engaging groove 6d and the engaging part 6e. After inserting the material along the same direction (see the imaginary line in Figure 2), tighten the bolt 14 and remove the holding member 1.
2, press the mounting part Sm. This ensures that the holder Sa is held as shown in Figure 2 and will not come off. In this state, as shown in Fig. 4, the mold release agent supply passage 6a and the mold release agent passage Se are electrically connected, and the blowing air passage 6b and the air passage Sd are electrically connected, so that the mold release agent and compressed air are supplied. The mold release agent is sprayed from the nozzle tip by the drive of the compressor. At this time, the residual agent discharge pipe 10 and the blow-off air pipe 9
The on-off valve shall be closed.

The features of this example configured in this way are as follows. First of all, since the nozzles are an integrated unit, all the nozzles can be replaced simply by replacing the holder Sa with a cartridge system.

In particular, since a large number of nozzles can be replaced at once, it is less time-consuming compared to the conventional method, which involves removing piping one by one.

Second, air hose for each nozzle,
Since a mold release agent hose is not required, a large number of nozzles can be arranged in parallel at narrow intervals, and even large molds can be uniformly coated with mold release agent. Also, since each hose is not required, the appearance can be maintained in a good condition.

Thirdly, when spraying onto the casting mold K, each nozzle Sb can be bent to suit the spraying surface, making it easy to apply the mold release agent to molds with complex shapes (Fig. 5). reference). For this reason, the length of the nozzle Sb is made long. Note that the material of the nozzle pipe does not matter as long as it can be deformed.
Therefore, if the nozzle of the exchangeable nozzle unit is bent in advance according to the mold, a nozzle that matches the mold can be obtained by simply exchanging the nozzle.

Fourthly, after the spraying is finished, the switching valve is used to open the residual agent discharge pipe 10, and with the mold release agent supply pipe 7 closed, the blow-off air pipe 9 is opened to supply compressed air to the mold release agent supply passage 6a, Supplied to mold release agent channel Sc. As a result, the mold release agent remaining in the pipes, passages, and conduits is removed from the residual agent discharge path 6.
Since the release agent is returned to the mold release agent tank from the discharge pipe 10 through c, there is no loss of the mold release agent and it can be used efficiently (see the imaginary line in FIG. 4). Furthermore, since the mold release agent in the nozzle Sb is also sprayed from the nozzle and emptied, the mold release agent does not fall from the nozzle when not in use.

Although this example is configured as described above, the present invention is not limited to this. For example, the shapes and mounting means of the nozzle mounting base and nozzle holder do not matter.
Further, the number of nozzles is arbitrary, as long as there are two or more, and the locations where the nozzles are arranged are not limited. Furthermore, the shapes of the release agent and compressed air supply channels formed inside the nozzle holder are also appropriate. In this example, the release agent supply passage and the blowing air passage were formed in the nozzle mount and communicated with the respective channels in the nozzle holder, but after the nozzle holder was attached to the nozzle holder, A structure may also be adopted in which the molding material supply pipe, the blowing air supply pipe, and the residual material discharge pipe are directly attached and communicated with the respective conduits of the nozzle holder. In short, the present invention provides a release agent supply pipe communicating with a release agent supply device, a blowing air pipe communicating with an air supply device, and means for displacing the position of a nozzle, in which a nozzle mounting base provided on a machine body is provided. and a mold release agent conduit and an air conduit that can be detachably attached to the nozzle mount and communicate with the supply pipes for the mold release agent and the blown air, or with the supply passages formed inside the nozzle mount. A nozzle holder having a mold release agent formed therein, and a number of nozzles that are connected to and branch from each of the channels in the holder, and further comprising means for supplying compressed air to one end of the release agent channel in the holder. This is a mold release agent spraying device characterized in that the other end of the mold release agent conduit in the holder is connected to a residual agent discharge pipe having an on-off valve.

Therefore, according to the present invention, a large number of nozzles can be easily replaced at the same time by simply replacing the nozzle holder, so replacing them does not take much time and effort as in the past, and it is possible to release the mold for each nozzle one by one. Because there is no need for agent or air hoses or piping, a large number of nozzles can be lined up at close intervals, making it possible to uniformly apply mold release agent to the entire mold even if the mold has a complex shape or large mold. After finishing, the release agent remaining in the mold release agent channel in the holder and in the nozzle can be discharged, making the next spraying smoother and preventing the residual agent from falling from the nozzle when not in use. It is highly effective, has a simple structure, is easy to handle, and can be manufactured at low cost.
There are advantages such as a good appearance.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is an enlarged front view of the main part, Fig. 3 is an enlarged longitudinal sectional side view of the main part, and Fig. 4 is an enlarged longitudinal sectional front view of the main part.
FIG. 5 is a side view of the spraying state with the nozzle bent. 6: Nozzle mounting base, 6a: Release agent supply passage, 6
b: Blowing air passage, 6c: Residue discharge passage, 7: Release agent supply pipe, 8: Blowing air pipe, 9: Blowing air pipe,
10: Residue discharge pipe, 12: Holding material, 14: Bolt, S: Nozzle unit, Sa: Nozzle holder, Sb: Nozzle, Sm: Mounting part.

Claims (1)

[Scope of Claims] 1. A mold release agent supply pipe communicating with a mold release agent supply device;
A device including a blowing air pipe communicating with an air supply device and a moving means for displacing the nozzle, which includes a nozzle mounting base provided on the machine body, a nozzle mounting base provided on the machine body, the mold release agent and A nozzle holder having a release agent conduit and an air conduit that can communicate with each of the supply pipes for blown air or the supply passages formed inside the nozzle mounting base, and a nozzle holder that is connected to each of the conduits in the holder. and a large number of nozzles branching out, and further provided with a means for supplying compressed air to one end of the mold release agent channel in the holder, and an on-off valve connected to the other end of the mold release agent channel in the holder. 1. A mold release agent spraying device, characterized in that the mold release agent spraying device is connected to a residual agent discharge pipe. 2. The mold release agent spraying device according to claim 1, wherein the nozzle is made of a flexible material.