JPH05309467A - Sprue dividing type pressurized casting method - Google Patents

Abstract

PURPOSE:To shorten casting cycle time. CONSTITUTION:After supplying molten metal M into a die from a sprue part 13, a sprue closing block 14 is slided to a sprue closing position P2 to close the sprue part 13 and the operation is shifted to a pressurized solidifying stage to the molten metal M. During this, by using an operating hole 22, cleaning of a runner part 15, application of parting agent to the runner part 15 and fitting of a filter 28 to the runner part 15 are executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure casting method such as a die casting (pressure die casting) casting method or a molten metal forging method for casting an aluminum alloy casting. The present invention relates to a sprue-gate-type pressure casting method in which a slidable spout closing block having a sprue portion is used for opening and closing.

[0002]

2. Description of the Related Art For example, in a die casting method using a horizontal cold chamber type die casting machine, as shown in FIG. 5, a fixed die 2 provided on a fixed platen 1 and a movable die 4 provided on a movable platen 3. After clamping and
The molten metal M supplied to the sleeve 6 by the ladle 5 is
Basically, the pressurizing plunger 7 is moved forward to pressurize the product space R while filling it. In addition, 8 is a stationary platen, 9 is a mold clamping cylinder, 10
Is an extrusion pin.

On the other hand, when following the die-casting method as described above and attempting to supply hot water to the die by the gravity action of the molten metal itself, the casting machine is arranged with a vertical die as shown in FIG. At the same time, the hot water supply system will be located at the top of the machine.

That is, in the example shown in FIG. 6, a spout block 14 is provided on a fixed die 12 that forms a die together with a movable die 11 and is horizontally slidable in a direction orthogonal to the spout portion 13.
The sprue block block 14 is provided with a sprue part 15 that can communicate with the sprue part 13. The gate closing block 14 slides by the operation of the cylinder 16.

When hot water is supplied, the sprue block 14 is positioned at the sprue release position P1 as shown in the figure, the sprue part 13 and the sprue part 15 are communicated with each other, and the ladle 17 is provided.
The molten metal is supplied to the product space R through the sprue part 13 and the runner part 15.

After the hot water is supplied, the gate closing block 14 is slid to the gate closing position P2 as shown in FIG. 7, and the gate part 13 is closed by the gate closing block 14,
The pressurizing plunger 18 facing the product part space R is moved upward by the pressurizing cylinder 19 to pressurize the molten metal in the product part space R.

[0007]

In the casting method shown in FIGS. 6 and 7, in order to maintain the quality of the product, cleaning of the runner portion 15 for the purpose of removing slag of oxides, etc. 15
It is necessary to apply a release agent to the runner part 15 and to load a filter on the runner part 15 for each shot. Due to the structure of the sprue block block 14, these operations are performed as shown in FIG. It cannot be performed unless the gate closing block 14 is in the gate opening position P1.

Since the gate closing block 14 is returned to the gate opening position P1 in the casting cycle after the product is taken out, each work such as the cleaning of the runner portion 15 is substantially for supplying hot water. Must be done in advance. As a result, the time required for the cleaning or the like directly affects the cycle time of the casting cycle, and the cycle time becomes long, which is not preferable.

The present invention has been made by paying attention to the above-mentioned conventional problems, and it is possible to shorten the cycle time by preventing the time required for cleaning the runner portion from affecting the cycle time. The present invention aims to provide a casting method.

[0010]

According to a first aspect of the present invention, a mold having a sprue part is provided with a spout block which is slidable in a horizontal plane orthogonal to the spout part, and the spout block is provided with the sprue block. Inside the mold by forming a runner part that can communicate with the sprue part and sliding the sprue block to the sprue release position where the sprue part and the sprue part communicate with each other. While supplying molten metal to
After the hot water is supplied, the molten metal in the mold is pressurized while sliding the gate closing block to the gate closing position where the gate and the runner are not in communication and the gate is closed by the gate closing block. In the sprue-dividing pressure casting method in which casting is performed while simultaneously pressurizing the molten metal in the mold, cleaning work of the runner part of the sprue block at the spout closing position and a release agent It is characterized by performing coating work.

According to the invention of claim 2, in addition to the requirement of claim 1, the work of cleaning the runner of the sprue block and the application of the release agent, and the work of loading the filter on the runner are performed. It is characterized by

[0012]

According to the method of the present invention, the work of cleaning the runner portion of the sprue block, the work of applying the release agent to the runner portion, and the operation of loading the filter on the runner portion are performed by the pressure solidification process of the molten metal. By doing so in parallel, the time required for cleaning the runners, etc. does not affect the cycle time of the casting cycle.

[0013]

1 and 2 show the structure of the essential parts of a casting machine for carrying out the method of the present invention. The parts common to the structures of FIGS. 6 and 7 described above are designated by the same reference numerals. There is.

That is, as shown in FIGS. 1 and 2, a work hole 22 is formed in a fixed die 21 fixed to a fixed platen 20 so as to be adjacent to the sprue portion 13 in the sliding direction of the sprue block 14. Cage, these sprues 13
The distance between the shaft centers of the work hole 22 and the working hole 22 is the gate block 1
It is set to be equal to the slide stroke of 4. Therefore, in the state where the sprue block block 14 is at the spout block position P2 as shown in FIG. 1, the sprue part 15 opens into the working hole 22 and communicates therewith, while as shown in FIG. In the state in which the sprue is at the spout opening position P1, the runner portion 15 communicates with the sprue portion 13 as in the conventional case.

The fixed platen 20 has a sprue 13
While the corresponding space portions 23 and 24 are formed in the working hole 22, respectively, the air blow port 2 which faces upward in the lower part of the fixed mold 21 is directed toward the working hole 22.
The air blow port 25 is formed so that the air supplied from the air pressure source 26 through the conduit 27 is blown out from the air blow port 25.

Therefore, in this embodiment, if the molten metal M is supplied through the sprue portion 13 and the sprue portion 15 with the sprue block block 14 in the sprue opening position P1 as shown in FIG. As shown in FIG. 1, the gate closing block 14 is immediately slid to the gate closing position P2, and the gate part 13 is closed by the gate closing block 14. Then, as shown in FIG. 6, the pressurizing plunger 18 accelerates solidification while pressurizing the molten metal M in the product part space R.

On the other hand, when the gate closing block 14 is slid to the gate closing position P2 as described above, the runner portion 15 coincides with the working hole 22. In this state, air is blown out from the air blow port 25, and the air blowing action removes metal oxides and the like adhering to the runner part 15 for cleaning, and after cleaning the runner part 15, The release agent is applied to the passage 15 and the filter 28 is loaded. The filter 28 is used to remove foreign matters and the like contained in the molten metal M during hot water supply.

As described above, in the process of pressurizing and solidifying the molten metal M, by cleaning the runner portion 15 in parallel with this, the cycle time of the casting cycle can be greatly shortened, and the mold temperature can be shortened. It is possible to prevent deterioration of the water temperature and deterioration of the bathing area.

3 and 4 are views showing another embodiment of the present invention. In this embodiment, the gate closing position of the gate closing block 14 is a first gate closing position P21 and a second gate closing position P22. The gate closing block 14 is slid in two steps from the gate opening position P1 while cleaning the runner portion 15 and applying the release agent, and the filter 28.
It is designed so that loading and loading are performed separately.

That is, a storage area 29 for storing a plurality of filters 28 is provided at a position adjacent to the work hole 22, and the runner portion 15 and the work hole 22 are provided as shown in FIG. When the gate closing block 14 slides to the communicating first gate closing position P21, the molten metal M in the product space R is pressurized and its solidification proceeds. Then, in the pressurizing and solidifying process of the molten metal M, the runner portion 1 by air blow from the air blow port 25.
The cleaning of 5 and the application of the release agent are performed.

Thereafter, the mold is opened, the product is taken out, and at the stage where the mold release agent is applied to the product-shaped portion of the mold, the gate closing block 14 is moved to the second gate closing position P22 as shown in FIG.
Slide up to. At this time, the runner part 15 of the spout block block 14 and the opening part of the storage area 29 coincide with each other and communicate with each other. Therefore, under this condition, the pusher should be put in front of the previously stored filter 28. Push out by 30. As a result, the filter 28 in the front row of the storage area 29 falls by its own weight and is loaded in the runner part 15 of the spout block block 14.

Therefore, also in the case of this embodiment, a series of operations can be completed without affecting the cycle time of the casting cycle as in the first embodiment.

[0023]

As described above, according to the present invention, in the process of pressurizing and solidifying molten metal, in parallel with this, cleaning of the runner portion of the gate block and application of the release agent, and further the runner portion. By performing the filter loading work for the mold, the time required for cleaning the runner does not affect the cycle time of the casting cycle, and the cycle time of the casting cycle can be significantly shortened and the mold temperature This has the effect of preventing the occurrence of defective casting such as deterioration and deterioration of hot running property.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention and is a cross-sectional view of a mold when a gate is closed.

FIG. 2 is a view showing an embodiment of the present invention and is a cross-sectional view of the mold when the gate is opened.

FIG. 3 is a view showing another embodiment of the present invention, which is a cross-sectional view of the mold when the gate is closed.

FIG. 4 is a view showing another embodiment of the present invention and is a cross-sectional view of a mold when a filter is replaced.

FIG. 5 is an explanatory sectional view showing the structure of a conventional horizontal cold chamber type die-cass machine.

FIG. 6 is an explanatory sectional view showing the structure of a conventional vertical die pressure casting apparatus.

7 is an operation explanatory view of the pressure casting device shown in FIG.

[Explanation of symbols]

 11 ... Movable type 13 ... Gate part 14 ... Gate closing block 15 ... Gate part 18 ... Pressurizing plunger 20 ... Fixed platen 21 ... Fixed type 28 ... Filter M ... Molten metal P1 ... Gate opening position P2 ... Gate closing position P21 ... No. 1st gate closing position P22 ... 2nd gate closing position

Claims (2)

[Claims] 1. A mold having a sprue part is provided with a sprue block which is slidable in a horizontal plane orthogonal to the sprue part, and the spout block is provided with a spout part which can communicate with the sprue part. In the state where the gate closing block is slid to the gate opening position where the gate and the runner communicate with each other, while supplying the molten metal into the mold through the gate and the runner, after the hot water is supplied, Casting is performed while pressing the molten metal in the mold while sliding the gate closing block to the gate closing position where the gate and the runner are not in communication and the gate is closed by the gate closing block. In the spout-divided pressure casting method as described above, in parallel with pressurizing the molten metal in the mold, cleaning work of the runner part of the spout block block at the spout closing position and release agent application work are performed. To do A characteristic sprue mold pressure casting method. 2. The sprue part pressure-casting method according to claim 1, wherein a sprue part of the sprue block is cleaned and a mold release agent is applied, and a filter is loaded into the sprue part. ..