JPH05285622A - Parting agent supplying device of casting machine - Google Patents

Abstract

PURPOSE:To uniformly make a die release agent adhere on an inner surface of die, core, etc., to prevent scattering of a die release agent around die, and to prolong die-life. CONSTITUTION:The die release agent supplying device of casting machine, which supplies and applies the die release agent on these dies after cast products are taken out from the dies 4, 5, comprises of the tank 16 to store the die release agent and the pump 17, which supplies the die release agent to inside die after the intake port is connected to the tank and the discharge port to the sleeve 6, which supplies molten metal to die.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold release agent supply device for a casting machine.

[0002]

2. Description of the Related Art For example, a die casting method, that is, a casting method in which a molten alloy is press-fitted into a precision die at high temperature to mass-produce a casting with high precision and excellent casting surface in a short time, It is carried out by a casting machine 1 as shown in FIG. Casting machine 1
Is a mold 4 fixed on the fixed die plate 2, a mold 5 arranged on the movable die plate 3 so as to face the mold 4, and the molds 4 and 5 are closed. A mold release agent is injected into a sleeve 6 for supplying molten metal, for example, an Al alloy, into the formed mold, a piston 7 and molds 4 and 5 for press-fitting the molten metal supplied to the sleeve 6 into the mold, and air blowing is performed. It is composed of an automatic spraying device 8 and the like.

When casting a product by the casting machine 1, first, the molds 4 and 5 are closed (mold closed) to form a mold according to the procedure of FIG. 3, and the sprue 6 of the sleeve 6 is formed.
The Al alloy that is melted from a is supplied with hot water, and the hot water supplied
After the alloy is injected (press-fitted) into the mold by the piston 7 and cooled for a predetermined time (DT (die timer)), these molds 4 and 5 are opened (mold open). The product cast from the mold 4 is slightly extruded by the extruder (not shown).

Then, after the product is taken out by a product take-out machine (not shown), the extruder is returned to the original state, and when the core is used, the core is put in the mold 4 and the automatic spraying device is used. 8 from each nozzle 8a to each of these molds 4, 5
After spraying and applying a release agent to the mold, dry air is blown from these nozzles (not shown) for air blow to these molds 4, 5 and the core to dry the mold release agent (air blow), The molds 4 and 5 are closed (mold closed) to start casting the next product.

[0005]

However, in the above conventional casting machine, since the automatic spraying device 8 sprays the mold releasing agent on the high temperature molds 4 and 5, the mold releasing agent is instantly evaporated and scattered. , Not only the surroundings get dirty but the floor becomes slippery. Moreover, the scattered release agent interferes with the release agent sprayed from the nozzle 5a toward the molds 4 and 5, which makes it difficult to supply the release agent to the molds 4 and 5. Therefore, in order to apply a sufficient amount of release agent to the molds 4, 5 and the core, a large amount of release agent is required, which is uneconomical. Also, if a low-temperature (about 10 ° C) mold release agent is directly injected into the molds 4 and 5 that are in a high temperature (about 150 to 120 ° C) state immediately after the product is taken out, the temperature difference between the two is large, so The molds 4 and 5 are likely to be cracked and the life of the mold is shortened.

Further, since it is necessary to uniformly spray the mold release agent onto the molds 4 and 5, a large number of nozzles 8a are required, and the jetting direction of each nozzle 8a must be adjusted in an optimum direction according to the mold. Is necessary and it takes time to adjust. Moreover, since the nozzle 8a has corrosion resistance and is formed of a copper pipe so as to be easily bent, if the nozzle 8a is bent and the injection direction is adjusted according to the size of the mold, the shape of the inner surface, etc., the nozzle 8a becomes fatigued and damaged. It will be easier. Also, the automatic spray device 8
Since a large number of nozzles for ejecting the release agent are provided as well as nozzles for air blow, there is a problem that the device becomes large.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a mold release agent supply device for a casting machine, which can prevent the mold release agent from scattering and prolong the life of the mold. To aim.

[0008]

In order to achieve the above object, according to the present invention, a mold release of a casting machine for removing a cast product from a mold and then supplying a mold release agent to the mold to apply the product. In the agent supply device, a tank for storing the mold release agent, a suction port is connected to the tank, and a discharge port is connected to a sleeve for supplying molten metal to the mold, and a product is taken out from the mold and the mold is closed. And a pump that supplies the release agent into the mold after the above.

[0009]

After the cast product is taken out of the mold, if there is a core, the core is put into the mold and the mold is closed.
Next, the pump of the release agent supply device is driven to supply a predetermined amount of release agent from the tank into the sleeve. Next, the mold release agent is injected into the mold by a piston for injecting the molten metal, which is inserted into the sleeve and supplied with hot water, into the mold.
The mold after taking out the product is at a high temperature due to residual heat, and the mold release agent is heated and evaporated in the closed mold, and is evenly attached to the inner surface of the mold and the core. Is applied. This prevents the release agent from scattering around the die when the release agent is applied to the die and reduces the amount of the release agent used.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The same or corresponding members as those in FIG. 1 are designated by the same or corresponding reference numerals. In FIG. 2, the casting machine 1
Is arranged such that the fixed die plate 2 and the movable die plate 3 are opposed to each other with a space therebetween, one die 4 is fixed to a predetermined position of the fixed die plate 2, and the die 4 is fixed to the movable die plate 3. The other mold 5 is arranged in opposition. The movable die plate 3 can be moved back and forth with respect to the fixed die plate 2 by an actuator (not shown) such as a hydraulic cylinder, and the die 5 is brought into close contact with or separated from the die 4.

For example, positioning pins 4a and 5a and holes 4b and 5b are provided at four corners of the end faces of the molds 4 and 5 which face each other. The mold 4 has pins 4a on one diagonal line.
However, holes 4b are provided on the other diagonals respectively, and the mold 5 is
Pins 5a and holes 5b are provided at positions opposite to the mold 4, and the pins 4a of the mold 4 and the holes 5b of the mold 5 are
The holes 4b of the mold 4 and the pins 5a of the mold 5 can be fitted with each other.

The sleeve 6 penetrates the fixed die plate 2 in a substantially horizontal direction, and its tip is communicated with the lower part of the mold 4, and the upper part has a gate 6a for injecting a metal to be melted.
And a hole 6b for supplying a release agent slightly downstream of the gate 6a (on the side of the mold 4). And
A piston 7 is fitted in the sleeve 6. The piston 7 can be moved forward and backward by an actuator (not shown) such as a hydraulic cylinder. The piston 7 is located on the rear end side of the gate 6a when moving backward, and the hole 6b when moving forward.
It is located on the front side, that is, on the die 4 side.

The automatic spraying device 8'is disposed on the upper end of the fixed die plate 2, and the supporting column 9 has an arm 10,
Each one end of 11 is rotatably supported, and these arms 1
The other ends of 0 and 11 are rotatably supported by the bracket 12. Actuator, for example, air cylinder 13
The tip of the rod is rotatably supported on the upper end of the column 9, and the tip of the rod is rotatably connected to the arm 10. Air nozzles 14, 14 are provided at the lower end of the bracket 12.
Are erected vertically, and the respective tips can be opposed to the molds 4 and 5, respectively.

This automatic spray device 8'includes a cylinder 1
When 3 extends, the bracket 12 descends as shown by the solid line, the tips of the nozzles 14 and 14 oppose the molds 4 and 5, respectively, and when the cylinder 13 shortens, the bracket 12 rises as shown by the chain double-dashed line. , Each nozzle 14, 14 is a mold 4,
Separate from 5. Then, the cylinder 13 has the molds 4 and 5.
When the mold is closed by combining
4 and 14 are moved above these molds 4 and 5, and the mold 4
When the molds 5 and 5 are separated from each other and are opened, the nozzle 14 is extended and
14 is made to face these molds 4 and 5.

The release agent supply device 15 is composed of a tank 16 and a pump 17. The suction port of the pump 17 is connected to the tank 16 via a pipe 18, and the discharge port thereof is connected via a pipe 19. Is connected to the hole 6b of the sleeve 6. Further, a release agent is stored in the tank 16. Then, the pump 17 sucks the release agent from the tank 16 and supplies it to the sleeve 6.

The operation will be described below with reference to the procedure of FIG. First, the movable die plate 3 is moved forward, the die 5 is closely fitted to the die 4, and the die is closed.
The Al alloy to be melted is supplied from the above, and the heated Al alloy is injected into the closed mold (hereinafter simply referred to as “mold”) by the piston 7. Predetermined time (DT) after injection
After a lapse of time, the movable die plate 3 is retracted to separate the mold 5 from the mold 4, and if there is a core, the core is removed, and, for example, an extruder (not shown) provided in the mold 5 The product cast by is slightly extruded from the die 5, and the product is taken out by a product takeout machine (not shown).

After the product is taken out from the mold 5, the extruder is returned to the original position, the core is further inserted, and then the mold 5 is placed in the mold 4.
And then close the mold again. Next, the pump 17 of the release agent supply device 15 is operated to inject the release agent into the sleeve 6, the piston 7 is driven at a low speed, and the release agent is injected into the mold. The molds 4 and 5 and the sleeve 6 are still in a high temperature state. Therefore, the mold release agent supplied to the sleeve 6 is heated up to the inside of the mold and is injected into the mold at a considerably high temperature. Further, it is heated in the mold to evaporate and uniformly applied to the inner surface and core of the mold.

Since the mold release agent is injected into the closed mold, it does not scatter to the outside. Therefore, the amount of the mold release agent used is small, and the periphery of the mold and the floor surface are kept. It doesn't get dirty. Furthermore, since the mold release agent is already heated to a considerable temperature when it is heated by the residual heat of the sleeve and injected into the mold, the temperature difference between the mold release agent and the mold becomes small, and the mold release agents 4 and 5 have a small temperature difference. The occurrence of cracks is reduced, and the service lives of these molds 4 and 5 are extended.

Then, the mold 5 is separated from the mold 4 and the mold is opened to remove the core and the automatic spraying device 8 '.
The cylinder 13 is extended to lower the bracket 12 to the position indicated by the solid line, and dry air is jetted (air blow) from the nozzles 14 and 14 toward the molds 4 and 5 to dry the release agent. Cylinder 1 after air blow to dies 4 and 5
3 shortens and raises the bracket 12 to the position of the chain double-dashed line, and separates it from the molds 4 and 5. After that, the core is inserted into the molds 4 and 5, the mold 5 is fitted into the mold 4 and the mold is closed, and the next mold is cast.

[0020]

As described above, according to the present invention, since the release agent is injected into the closed mold and evaporated in the mold, the mold release agent is attached evenly to the inner surface of the mold and the core. Applied,
Moreover, the release agent does not scatter around the mold, and accordingly, the amount of the release agent used decreases, the stain around the casting machine decreases, and the floor surface is prevented from slipping. Further, the temperature difference between the mold release agent and the mold becomes small, the occurrence of cracks in the mold is reduced, and the mold life is extended. Furthermore, since there is no nozzle for injecting the release agent, adjustment of the release agent supply section is not required, work efficiency can be improved, and the spray device is only a nozzle for air blow, which is small and lightweight, and an air blow nozzle. Has an excellent effect such as improvement in durability.

[Brief description of drawings]

FIG. 1 is a schematic view in which a main part of a conventional casting machine is partially cut away.

FIG. 2 is a schematic view showing an embodiment of a mold release agent supply device for a casting machine according to the present invention.

FIG. 3 is a flow chart showing a procedure of casting by the casting machine of FIG.

FIG. 4 is a flowchart showing a casting procedure of a casting machine to which the present invention is applied.

[Explanation of symbols]

 1 Casting Machine 2 Fixed Die Plate 3 Movable Die Plate 4, 5 Mold 6 Sleeve 7 Piston 8'Automatic Spray Device 14 Air Nozzle 15 Release Agent Supply Device 16 Tank 17 Pump

Claims (1)

[Claims] 1. A mold release agent supply device for a casting machine, which removes a cast product from a mold and then supplies the mold release agent to the mold to apply the mold release agent, and a tank for storing the mold release agent and a suction port. Is connected to the tank, a discharge port is connected to a sleeve for supplying molten metal to the mold, and a pump for supplying the release agent into the mold after taking out a product from the mold and closing the mold. A mold release agent supply device for a casting machine, which is characterized by being provided.