JPS629744A - Method for sticking parting agent to metallic mold for casting - Google Patents

Abstract

PURPOSE:To prevent the penetration of a pouring metal to a mold splitting plane and to decrease the splash of a parting agent to the periphery by clamping metallic molds for casting having a split construction then blowing the parting agent under a high pressure to the metallic molds in the hermetic state. CONSTITUTION:The metallic molds for casting having the split construction consisting of a cope 2 having a pouring port 4 and a drag 3 inserted with a knock-out punch 5 are clamped on a press table 6. A nozzle 1a for spraying the parting agent is attached to the port 4 and is sealed by a plate-shaped jig 1 having a flange 1b to hermetically close the metallic molds. The parting agent consisting of graphite is thereafter blown from the nozzle 1a under about 7kg/cm<2> pressure and is stuck to the inside peripheral surface of the metallic molds. The penetration of the pouring metal to the splitting plane of the metallic molds is thereby prevented and the generation of a flash is prevented. The splashing of the parting agent to the periphery is thus decreased and the parting agent is hygienically stuck to the metallic molds with the smaller amt. of the parting agent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for applying a mold release agent to a casting mold, particularly to a mold having a split mold structure.

[Conventional technology]

In order to attach a mold release agent to a casting mold with a conventional 10% mold structure,
With the mold open, spray the mold release agent using a spray nozzle.
It is sprayed onto the inner peripheral surface of the mold at a spray pressure of ~5 kg/crl.

[Problem that the invention seeks to solve]

However, this method not only requires a large amount of mold release agent because the mold release agent is scattered around, but is also unsanitary. Furthermore, the mold release agent adheres to the split mold surface (joint) of the mold, and the poured metal is inserted into this split mold surface during casting, creating flash on the cast product, which is scraped off in the later process. There was a need.

This invention was made in order to solve such problems, and it prevents pouring metal from being inserted into the split surface of a casting mold, prevents the occurrence of mold spots, and The purpose is to hygienically attach a mold release agent to a mold using an unscrupulous mold release agent while reducing scattering.

[Means for solving problems]

A method of applying a mold release agent to a casting mold according to the present invention is as follows.

After clamping the split-structure casting mold, the mold is sealed by a plate-shaped jig to which a nozzle for spraying mold release agent is attached to the pouring spout, and the mold release agent is sprayed from the nozzle. The mold release agent is sprayed at high pressure to adhere to the inner peripheral surface of the mold.

[For production]

In this invention, a plate-shaped jig to which a spray nozzle is attached seals the spout of the casting mold after mold clamping, sealing the mold, and spraying the mold release agent in the sealed state. Not only can the scattering of the cooling agent to the surrounding area be prevented, but since the mold is clamped, there is no mold release agent adhering to the surface of the split mold, which prevents pouring metal from being inserted into the surface of the split mold and prevents the occurrence of casting defects. To prevent.

[Embodiments of the invention]

The drawing is a sectional view showing a method of spraying a mold release agent according to an embodiment of the present invention. In the figure, 11) is a plate-shaped jig to which a mold release agent spray nozzle is attached;
a) and 7 langes (1b) to which nozzles (1a) are attached. (2) is an upper mold that constitutes a casting mold with split mold structure, (3) is a lower mold, (4) is a spout, (5) is a knockout punch, (6) is a press table, (7)
) is the gas vent.

Clamped upper mold (2) and lower mold (31t-200~300
Preheat to 'C', insert the release agent spray nozzle [1a] into the mold hole from the pouring port (4), press the flange (1b) against the pouring port (4) to seal it, and then Seal it tightly. After that, the mold release agent was sprayed at a high pressure of r kg/all from the nozzle (1a) and was sprayed onto the inner surface of the mold to make it adhere. As the mold release agent, graphite with an average particle size of 1 μm was used, and the A paste made by dispersing it in water was used.

Since the mold was sealed and the mold release agent was injected, there was less scattering to the surrounding area, making the process more hygienic and requiring only a small amount of mold release agent.

Also, since it is sprayed at high pressure, it is possible to clean the gas vent and also check the ventilation. After spraying the mold release agent, the nozzle (1a) and 7 lunges (
Molten metal was injected through the spout (4) from which 1b) had been removed, and casting was performed normally.

The obtained casting was free of flash. This is because the release agent is injected and sprayed after tightening, so there is no release agent adhering to the hot surface on the 2nd side, and the upper mold (2) and lower mold (3) are in close contact with each other, and the mold release agent is sprayed onto the split mold surface. This is thought to be because the insertion of the pouring metal is obstructed.

〔Effect of the invention〕

As described above, according to the present invention, after clamping a casting mold having a 10-part structure, the pouring port is sealed with a plate-shaped jig equipped with a nozzle for spraying a mold release agent, and the mold is closed. By sealing the mold and spraying the mold release agent at high pressure from the nozzle to make the mold release agent adhere to the inner peripheral surface of the mold,
It is possible to prevent the pouring metal from being inserted into the split mold surface of the casting mold, thereby preventing the occurrence of casting defects, and it also reduces the scattering of the mold release agent to the surrounding area, allowing for hygienic molding with a small amount of mold release agent. A mold release agent can be attached to the mold.

[Brief explanation of drawings]

The drawing is a sectional view showing a method of spraying a mold release agent according to an embodiment of the present invention. In the figure, (l) is a plate-shaped jig attached with a nozzle for spraying a mold release agent, (21 is an upper mold that constitutes a casting mold with a split mold structure, (3) is a lower mold, (4) is the pouring spout.

Claims (2)

[Claims] (1) After clamping the split-structure casting mold, the pouring port is sealed with a plate-shaped jig equipped with a mold release agent spraying nozzle to seal the mold, and the mold is sealed using the nozzle. A method for attaching a mold release agent to a casting mold, comprising spraying the mold agent at high pressure to adhere the mold release agent to the inner peripheral surface of the mold. (2) The method for attaching a mold release agent to a casting mold according to claim 1, wherein the mold release agent is graphite.