JPH0137819Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an improvement of a device for spraying a mold release agent onto a mold in a die-casting machine.

[Conventional technology]

Conventionally, as a mold release agent spraying device as described above, one disclosed in Japanese Utility Model Publication No. 14474/1983 is known.

[The problem that the idea aims to solve]

The conventional mold release agent spraying device has three systems of passages: a mold release agent liquid supply passage, a spray air supply passage, and a blow air supply passage, but these three passages are completely independent, Since the spray air supply passage and the blow air supply passage are configured to be switched by a solenoid valve, multiple release agent spray pipes are installed in the spray head that moves back and forth between the molds. If the device structure is equipped with a blow air blower pipe, there is a problem of oil dripping due to the release agent remaining in the release agent spray pipe and the spray pipe distribution passage hole dripping after spraying, and air leakage to the mold surface. The blowing air is specified only to the blow air blow pipe, and it is not possible to clean the mold surface over the entire area by blowing out the blow air from all the pipes of the air blow pipe and the release agent spray pipe at the same time. Since the spraying of the mold release agent cannot be stopped by supplying blowing air, there is a time lag between the stop of spraying the mold release agent and the spraying of the blowing air, which lengthens the time for one cycle of spraying and cleaning. There are other problems.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention has a spray head 1 that moves back and forth between open molds of a die casting machine, and has multiple mold release agent spray pipes that spray mold release agent onto the mold surface with air. 10, a plurality of air blowing pipes 11 are installed for blowing blowing air onto the mold surface, and a releasing agent liquid feeding path O is installed in the spray head 1 to distribute the releasing agent to each spray pipe inner pipe 10a. , an air supply passage S that distributes release agent spray air to each spray tube outer tube 1, and an air supply passage B that distributes and supplies blowing air to each air blow tube 11.
The supply side passage hole o leading to the spray pipe distribution passage hole o2 of the mold release agent liquid feeding passage O
The mold release agent supply side passage hole o1 is normally shut off in one part, and when the spray air is partially introduced into the piston chamber 21a, the mold release agent supply side passage hole o1 is opened to spray the mold release agent. A piston valve 21 for opening and closing the liquid feeding passage is provided, and the air introduction passage hole C is opened in the middle of the air introduction passage hole C for introducing part of the spray air into the piston chamber 21a when the mold release agent is being sprayed. A piston valve 33 for cutting off introduced air is provided, which is operated to close so as to block the air introduction passage hole C by introducing a part of the blowing air when the blowing air is ejected, and the blow into the piston chamber 34 is closed. A gas-liquid passage passage hole E that conducts between a part of the air introduction passage hole D and the spray pipe distribution passage hole o2 of the mold release agent liquid feeding passage O is provided with a gas-liquid passage passage hole E that conducts between the part of the air introduction passage hole D and the spray pipe distribution passage hole o2 of the mold release agent liquid feeding passage O. The present invention is characterized by the provision of check valves 38, 38' which are operated to open so as to open the through hole E by introducing a portion of the blowing air when the blowing air is ejected.

〔Example〕

Embodiments of this invented device will be described below with reference to the drawings. Figure 1 is a system diagram schematically showing the release agent spraying device in the die-casting machine of this invention.
Figures 2 to 7 show specific structural diagrams of an embodiment of the device, and 1 in the figure indicates a sprayer that is moved forward and backward by a fluid pressure cylinder (not shown) between the open molds of a die-casting machine. The spray head 1 is attached to a fixed plate 3 attached to the piton rod 2 of the fluid pressure cylinder, and is fixed face-to-face with the lower side of the fixed plate 3 by bolts or other mounting means (not shown). A manifold 4, a pipe set board 5 which is surface-fitted to the lower side of the manifold 4 and fixed by a mounting means (not shown) such as a bolt, and a pipe set board 5 which is surface-fitted to one end of the manifold 4 and fixed by a mounting means (not shown) such as a bolt. (not shown), and the fixed platen 3 includes a mold release agent supply pipe 7 and a spray air supply pipe 8 which also serves as a lifting guide.
and a blowing air supply pipe 9 are attached to the pipe set board 5, and a plurality of mold release agent spray pipes 10 for spraying mold release agent onto the mold surface with air (these spray pipes are short inner pipes). 10a and a long outer tube 10b whose lower end is bent toward the mold direction); and a plurality of air blowing pipes 11 for blowing blowing air onto the mold surface. are installed as shown in Figures 3 and 4. In the case of the embodiment shown in the drawings from FIG. 2 onwards, the release agent spray pipes 10 are arranged on both the left and right sides of the pipe setting board 5, with a total of 12 on each side.
There are 24 blow air pipes 11, and five blow air pipes 11 are arranged in the center of the pipe set board 5 as shown in FIGS. 2 and 4, but this number is not particularly limited. It can be changed to any number.

The spray head 1 is provided with a mold release agent through each spray pipe 1.
0, an air supply passage S for distributing release agent spray air into the outer pipe 10b of each spray pipe 10, and an air supply passage S for distributing release agent spray air into the outer pipe 10b of each spray pipe 10; Three systems of air supply passages B for distributing and supplying air to each air blow tube 11 are formed as shown in FIG.

The mold release agent liquid feeding passage O consists of a mold release agent supply side passage hole o1 and a distribution passage hole o2 to each spray pipe 10, and the supply side passage hole o1 is connected to the mold release agent supply pipe 7. Vertical vertical hole 12 opened on the top surface of the fixed plate 3
and a vertical vertical hole 1 opened in the lower center of the fixed platen 3.
4, and a horizontal horizontal hole 12 between the vertical vertical holes 12 and 14.
a, 14a as shown in FIG. 3, and a vertical vertical hole 15 bored in the center of the manifold 4 so as to be connected to the vertical vertical hole 14, and The central horizontal vertical hole 16 in the longitudinal direction of the manifold communicates with the lower end of the vertical vertical hole 15
The distribution passage hole o2 is formed with the left and right horizontal vertical holes 17, 17' of the manifold 4, which communicate with the central horizontal vertical hole 16 of the mold release agent supply side passage hole o1 as shown in FIG. Distribution of a plurality of nozzles (in the case of the embodiment, 12 on each side) branched from the horizontal vertical holes 17 and 17' and communicated with the inner pipe connection nozzles 19 and 19' of the mold release agent spray pipe 10 as shown in FIG. It is formed from vertical vertical holes 18, 18'. Then, the amount of release agent discharged to each release agent spray pipe 10 is manually controlled at the branch communication portion between the left and right horizontal vertical holes 17, 17' of this distribution passage hole o2 and the distribution vertical vertical holes 18, 18'. A plurality of flow rate regulating valves 20, 20', which are screw needle valves that can be arbitrarily adjusted by
It is provided as shown in the figure, and the supply side passage hole o1 portion (the center horizontal vertical hole 16 of the manifold 4 and the left and right horizontal vertical holes 17, 17' When the supply of spray air is stopped, the release agent liquid passage O is blocked by the biasing force of the spring 22, and when the spray air is supplied, a part of the spray air is introduced to remove the release agent. A piston valve 2 for opening and closing the liquid feeding passage that operates to open the liquid feeding passage O and spray the mold release agent.
1 and 21 are provided as shown in FIGS. 3 and 4.

The air supply passage S for the spray air includes a vertical vertical hole 33 bent into a crank shape formed on the upper surface of the fixed plate 3 connected to the spray air supply pipe 8, and an opening at the lower end of the vertical vertical hole 23. An inverted T-shaped vertical vertical hole 24 is bored in the manifold 4 as shown in FIG. left and right horizontal vertical holes 25, 25' in the direction, and a plurality of holes branched from the left and right horizontal vertical holes 25, 25' and communicated with outer pipe communication openings 26, 26' of the mold release agent spray pipe 10 as shown in FIG. It is formed from distribution diagonal holes 27, 27' of the books (12 on the left and right in the case of the embodiment),
A part of the spray air entering the horizontal vertical hole 25' on one side of the spray air supply passage S flows through the air introduction passage hole C into the piston chambers of the piston valves 21, 21 for opening and closing the release agent liquid supply passage. The releasing agent liquid feeding passage O can be opened by pushing up the piston valves 21, 21 against the spring 22.

The blow air passage B has an inverted T-shaped vertical hole 28 as shown in FIG.
A vertical hole 29 bored in the manifold 4 as shown in FIG. 3 so as to be connected to the vertical hole 28,
A central horizontal vertical hole 30 in the longitudinal direction of the manifold communicates with the lower end of this vertical vertical hole 24, and a plurality of holes ( In the case of the example, 5 pieces)
It is formed from a distribution communication hole 31.

In addition, some of the spray air is transferred to the piston chamber 21.
The air introduction passage hole C to be introduced into the controller 6 is bored in the controller 6 as shown in FIGS. 1, 3, and 6 so as to communicate with the open end of the horizontal vertical hole 25' of the manifold 4. A ventilation hole C1,
A manifold ventilation hole C2 in a horizontal and vertical direction is formed in the manifold 4 so as to communicate with the open end C1' of this ventilation hole C1 as shown in FIG. 7, and a communication hole C3 between this vertical ventilation hole C2 and the piston chamber 21a. When spraying the mold release agent, the air introduction passage hole C is opened by the biasing force of the spring 32, and when the blowing air is ejected, the blowing air is A third piston valve 33 for shutting off introduced air is operated to shut off the air introducing passage hole C when a portion of the introduced air is introduced.
It is installed as shown in the figure.

D is a passage hole through which a part of the blowing air is introduced into the back of the piston chamber 34, and this air introduction passage hole D is connected to the open end of the manifold horizontal vertical hole 30 of the blowing air supply passage B and the piston. It is formed by an L-shaped passage hole bored in the controller 6 as shown in FIG. 3 so as to communicate with the chamber 34.

E is a gas-liquid passage connecting the blowing air introduction passage hole D and the spray pipe distribution passage hole o2 (opening ends of the left and right horizontal vertical holes 17, 17') of the mold release agent liquid feeding passage O. This gas-liquid passage communication hole E is opened on both the left and right sides of the blowing air introduction passage hole D and communicates with the controller horizontal holes 35 and 35', and the controller horizontal hole and the left and right horizontal vertical holes 1 of the manifold 4.
It consists of valve chambers 36, 36' which communicate with the opening ends of the holes 7, 17' as shown in FIG.
6, 36' contains a spring 37 when the mold release agent is ejected.
Check valves 38 and 38' are operated to block the gas-liquid passage through hole E by the biasing force of , and open the through hole E by introducing a portion of the blow air when blowing air is ejected, as shown in FIG. It is assembled as shown in FIG.

In order to smoothly open and close the piston valves 21 and 33 incorporated in the piston chambers 21a and 34, air holes 4 are provided that communicate with the outside from each piston chamber.
0 and 41 are provided as shown in FIGS. 4 and 6.

[Effect]

The mold release agent spraying device of the present invention configured as described above supplies the mold release agent from the mold release agent supply pipe 7 and the mold release agent spray from the spray air supply pipe 8 when the blowing air is stopped. When air is supplied, this spray air flows through the air supply passage S (vertical vertical hole 23 of fixed plate 3 → vertical vertical hole 24 of manifold 4 → left and right horizontal vertical holes 25, 25' → distribution diagonal hole 27 ,2
7') through the outer pipe 10b of each mold release agent spray pipe 10.
A part of this spray air flows through the air introduction passage hole C (controller ventilation hole C1).
→ Manifold ventilation hole C2 → Piston chamber communication hole C
3) enters the piston chamber 21a through the piston chamber 21a, and the piston valves 21, 21 for opening and closing the mold release agent feeding passage are operated backward to open the mold release agent liquid feeding passage O, so that the mold release agent is supplied from the mold release agent supply pipe 7. The released mold release agent flows through the mold release agent liquid feeding passage O (vertical vertical hole 12 of fixed plate 3 → horizontal vertical hole 13 →
Vertical vertical hole 14 → Vertical vertical hole 15 of manifold 4
→ Horizontal vertical hole 16 → Horizontal vertical hole 17, 17' → Flow rate adjustment valve 20, 20' → Distribution vertical vertical hole 18,
18') through the inner pipe 10 of each mold release agent spray pipe 10.
a, and is sprayed onto the mold surface from the tip of the mold release agent spray pipe 10 by spray air.

Furthermore, when blowing air is supplied from the air supply pipe 9 after the spraying of the mold release agent is finished, the blowing air is transferred from the air supply passage B (from the vertical vertical hole 28 of the fixed platen 3 to the vertical vertical hole 28 of the manifold 4). At the same time, a part of this blowing air passes through the air introduction passage hole D and enters the piston chamber 34. The piston valve 33 is moved forward to block the spray air introduction passage hole C. Therefore, the introduction of spray air into the valve chamber 21a of the piston valves 21, 21 for opening and closing the release agent liquid feeding passage is blocked, and the piston valves 21, 21 are moved forward by the biasing force of the spring 22. The mold release agent liquid feeding path O is now blocked. At the same time, a part of the blowing air that entered the blowing air introduction passage hole D of the controller 6 enters the gas-liquid passage passage hole E in the middle of the passage hole, opening the check valves 38 and 38'.
The blowing air passing through the check valve chambers 36, 36' flows through the distribution passage hole o2 of the release agent liquid feeding passage O (left and right horizontal vertical holes 17, 17' of the manifold 4 → the same distribution vertical vertical holes 18, 18'). The release agent remaining in the release agent distribution passage hole o2 and the release agent attached to the inner wall of each release agent spray pipe 10 are all discharged to the outside.

Note that the spraying of the mold release agent can be stopped by stopping the supply of spray air (in this case, by stopping the supply of spray air, the piston valves 21, 21 for opening and closing the mold release agent feeding passage are closed, and the mold release agent is stopped). (liquid feeding passage O is blocked), and a method for sending blowing air without stopping the spray air (in this case, a part of the blowing air enters the piston chamber 34 through the air introduction passage hole D, and the piston The valve 33 is operated forward to block the introduction passage hole C of the spray air, thereby blocking the introduction of the spray air into the valve chamber 21a of the piston valves 21, 21 for opening and closing the release agent liquid feeding passage. The piston valves 21, 21 are springs 22
In the latter case, the air for spraying and blowing flows through all of the release agent spray pipe 10 and air jet pipe 11. Since the air is ejected from the tubes at the same time, the mold surface can be well cleaned by powerful air blowing.

[Effect of idea]

The mold release agent spraying device for a die casting machine of this invention has three passages in the spray head 1: a mold release agent liquid supply passage O, a spray air supply passage S, and a blow air supply passage B. However, a piston valve 21 for opening and closing the liquid feeding passage is provided in the supply side passage hole o1 of the mold release agent liquid feeding passage O leading to the spray pipe distribution passage hole o2, In the middle of the air introduction passage hole C through which a part of the spray air is introduced into the piston chamber 21a, an air introduction passage hole C is opened when the mold release agent is being sprayed, and when blowing air is ejected, a part of the blow air is introduced. A piston valve 33 for shutting off introduced air is provided, which is operated to shut off the introduction passage hole C, and a part of the blowing air is introduced into the piston chamber 34 through the introduction passage hole D and the release agent liquid feeding passage O. Spray pipe distribution passage hole o2
A gas-liquid passage through hole E that communicates between the mold release agent and the mold release agent is configured such that the through hole E is shut off when the mold release agent is sprayed, and when the blowing air is ejected, the through hole E is opened by introducing a part of the blowing air. Since the passage is configured with check valves 38 and 38' that are opened, switching control using spray air and blow air is possible, and when blow air is ejected, blow air is partially introduced into the passage. By flowing into the spray pipe distribution passage hole o2 of the mold release agent liquid feeding passage O through the hole D and the gas-liquid passage passage hole E, the spray remaining in this distribution passage hole o2 and each mold release agent spray pipe 10 Residual mold release agent can be blown out,
Therefore, it is possible to solve the problem of oil dripping in which the mold release agent remaining in the mold release agent spray pipe and the spray pipe distribution passage hole drips after being sprayed.

In addition, air can be blown onto the mold surface by simultaneously blowing air not only from the blow air pipe 11 but also from the entire group of air pipes 11 and the mold release agent spray pipe 10. The entire mold surface can be thoroughly cleaned.

Furthermore, since the spraying of the mold release agent can be stopped by supplying blowing air, there is no time lag between stopping the spraying of the mold release agent and blowing out the blowing air, reducing the spraying and cleaning time per cycle. It can be shortened and has excellent practical effects such as speeding up spraying and cleaning operations.

[Brief explanation of the drawing]

Figure 1 is a system diagram schematically showing the release agent spraying device in the die-casting machine of this invention;
The figure is a front view showing an embodiment of the same device, FIG. 3 is a central longitudinal sectional view of the device, FIGS. 4 and 5 are sectional views taken along lines - and - in FIG. 3, and FIG. 7 is an end view of the controller seen from the manifold joint surface side, and FIG. 7 is a partial sectional view taken along the line - in FIG. 6. 1... Spray head, 2... Piston rod of fluid pressure cylinder, 3... Fixed plate, 4... Manifold,
5... Pipe set board, 6... Controller, 7... Mold release agent supply pipe, 8... Spray air supply pipe, 9... Blow air supply pipe, 10... Mold release agent spray pipe, 11...
Air blow pipe, O... Release agent liquid feeding passage, o1... Supply side passage hole, o2... Spray pipe distribution passage hole, 20, 20'
...Flow rate adjustment valve, 21...Piston valve for opening and closing the mold release agent feeding passage, 21a...Piston chamber, S...Air feeding passage for spray, B...Air feeding passage for blowing, C
...Spray air introduction passage hole, C1...Controller ventilation hole, C2...Manifold ventilation hole, C3...Piston chamber communication hole, 33...Piston valve for shutting off introduced air, 34...Piston chamber, D...Blow air introduction passage Hole, E...Air-liquid passage hole, 38, 38'...
Check valve.

Claims (1)

[Scope of utility model registration request] A spray head 1 that moves forward and backward between open molds of a die-casting machine has a plurality of mold release agent spray pipes 10 that spray a mold release agent onto the mold surface with air, and a plurality of mold release agent spray pipes 10 that spray blowing air onto the mold surface. Multiple air blow tubes attached 1
1 is attached to the mold release agent spraying device, the spray head 1 has a mold release agent liquid feeding path O that distributes the mold release agent to each spray pipe inner pipe 10a, and a mold release agent spraying passage O that supplies the mold release agent spray to each spray pipe. An air supply passage S that distributes and supplies blowing air to the outer tube 10b and each air blower pipe 11
Three systems of air supply passages B are formed to distribute and supply air to the spray pipe distribution passage hole o of the mold release agent liquid supply passage O.
The part of the supply side passage hole o1 leading to the mold release agent supply side passage hole o1 is normally closed, and when the spray air is partially introduced into the piston chamber 21a, the mold release agent supply side passage hole o1 is opened to release the mold. A piston valve 21 for opening/closing the liquid supply passage is provided to open and close the liquid supply passage so as to spray the mold release agent, and an air passage hole C is provided in the middle of the air introduction passage hole C for partly introducing the spray air into the piston chamber 21a. A piston valve 33 for shutting off the introduction air is provided, which is operated to close so as to cut off the air introduction passage hole C by introducing a part of the blowing air when the introduction passage hole C is opened and blowing air is ejected. A gas-liquid passage passage hole E that communicates between a passage hole D for partially introducing blowing air into the chamber 34 and a spray pipe distribution passage hole o2 of the mold release agent liquid feeding passage O;
Check valves 38 and 38' are provided which are operated to open so as to shut off the through hole E when the mold release agent is sprayed, and open the through hole E by introducing a portion of the blowing air when blowing air is ejected. A release agent spraying device for a die-casting machine, characterized by the following.