JPH0360844A - Molding device - Google Patents

Abstract

PURPOSE:To constitute a molding device securing a feeder head under excellent heat holding condition by superposing the necessary number of annular molding members and further, mounting only one of plate-like molding member to constitute the feeder head forming space. CONSTITUTION:The molding device 1 having cavity 2 is constituted with a lower mold 11, middle mold 12, side mold 13, upper mold 14 and insert 121. To an insert hole 142 formed on upper face of center part in this upper mold 14, the annular molding members 81, 82, 83 are superposed in order through gap S and on these, the plate-like molding member 84 is mounted to constitute the feeder head forming space A. Then, the feeder head forming space A is communicated with gas venting holes B, 842, 831, 821, 811. By this method, in the molding part constituting the feeder head forming space A, heat conductivity is low to hold the feeder head under excellent heat holding condition.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a mold device having a feeder forming space.

[Prior art]

In conventional molding devices of this type, the riser forming space was integrally molded with the mold.

[Problem to be solved by the invention]

However, when the feeder forming space is integrally molded into the mold in this way, the heat conduction of the mold (the part that makes up the feeder forming space) is excellent, but this results in the disadvantage that the heat retention of the feeder is not in a desirable state. I had it.

[Means to solve the problem]

In order to achieve the above object, in a mold device according to the present invention, in a mold device equipped with a feeder forming space communicating with a cavity, in configuring the feeder forming space, a required number of annular mold members and a unique mold member are used. The required number of annular mold members are stacked and the disc-shaped mold member is placed on the upper surface of the annular mold member disposed at the upper end. It was placed there.

[Action of the invention]

Since the mold apparatus according to the present invention is constructed as described above, in order to construct the feeder forming space, a required number of annular mold members and only one disc-shaped mold member are used. Since the required number of annular mold members are stacked and the disc-shaped mold member is placed on the upper surface of the annular mold member disposed at the upper end, heat conduction is difficult in the mold part that constitutes the feeder forming space. Become.

[Explanation of Examples]

As an embodiment of the present invention, a molten metal filtration device for a mold for a vehicle wheel is employed, and will be described below based on the drawings.

In FIG. 1, reference numeral 1 denotes a mold device, which is constructed by combining a lower mold 11, a middle mold 12, a horizontal mold 13, an upper mold 14, and an upper auxiliary mold 141. Further, 2 is a cavity of the molding device 1, which has the shape of a vehicle wheel. Reference numeral 121 denotes a nest, which projects from the medium mold 12 and extends into the cavity 2. This insert 121 is for forming a shaft hole of a vehicle wheel. Next, 131 is a runner, which extends laterally in the horizontal mold 13. This runner 131 opens to the side of the cavity 2 (rim forming space) via the weir 3. The other end of this runner 131 has an opening 4 on the outer surface of the horizontal mold 13. Reference numeral 5 denotes an auxiliary mold, which is installed in close contact with the outside of the horizontal mold 13. A dome-shaped main space 51 is formed inside the auxiliary mold 5, and has an opening 511 on the lower surface of the auxiliary mold 5. Further, 52 is a connecting path, which is formed in the auxiliary mold 5 like the main space 51. This connecting path 52 has one end opened into the main space 51 and the other end opened 521 into the left side surface of the auxiliary mold 5 (in FIG. 1). And this connecting road 5
The outer frontage 521 of No. 2 faces the outer opening 4 of the runner 131. Therefore, the molten metal in the main space 51 can flow into the runner 131 after passing through the connection path 52 . A stalk auxiliary ring 61 is brought into contact with the peripheral edge of the lower opening 511 of the auxiliary mold 5.

Further, 62 is a stalk main body, and the stalk auxiliary ring 6
It is connected to the bottom of 1. This stalk main body 62 and the stalk auxiliary ring 61 together constitute a so-called "stoke". A flat filter 7 is held between the auxiliary mold 5 and the stalk auxiliary ring 61. This filter 7 has a mesh shape and filters the molten metal supplied to the channel changer 5 via the stalk 6.

Next, in FIG. 2, reference numeral 142 denotes a fitting hole, which is formed on the upper surface of the central portion of the upper mold 14. This insertion hole 142 communicates with the cavity 2. 81,
Reference numerals 82 and 83 designate annular mold members, which are fitted into the fitting hole 142 with a gap S therebetween, and are stacked one on top of the other.

Here, the inner diameter of the middle annular mold member 82 is larger than the inner diameter of the lower annular mold member 81, and the inner diameter of the upper annular mold member 83 is larger than the inner diameter of the middle annular mold member 82. In addition, the inner circumferential surfaces of these annular mold members 81, 82.83 are formed in a tapered shape whose diameter increases toward the lower end, and the continuous portions on the inner circumferential surfaces of each annular mold member 81, 82.83 are stepped. It constitutes the state. This is to prevent undercuts from occurring even if the annular mold members 81, 82, 83 move horizontally by the gap S within the insertion hole 142. Reference numeral 84 denotes a disk-shaped mold member, which is fitted into the fitting hole 142 with a gap S therebetween, similar to the annular mold members 81, 82, and 83. This disk-shaped mold member 84 is placed on the upper surface of the annular mold member 83, and the annular member 81
．． A riser forming space A is configured in the inner circumference of 82 and 83. Note that, similarly to the above, a stepped portion is formed in the continuous portion of the disk-shaped mold member 84 and the annular mold member 83 so that undercuts do not occur. Moreover, in the disk-shaped mold member 84, 841.841. ... is a gas vent hole, B, B,...
・ is a vent (see Figure 3). 842,83
Reference numerals 1.821 and 8.11 are gas vent grooves, which are formed on the lower surface of the disc-shaped mold member 84 or the annular mold member 81° 82.83 (see FIGS. 3 and 4). , FIG. 3 shows an annular mold member 85).

These grooves 842, 831, 821, 811 act as vents when stacked (see Figure 2).

〔Effect of the invention〕

A mold device according to the present invention is a mold device equipped with a feeder forming space communicating with a cavity, and includes a required number of annular mold members and a sole disc-shaped mold member in configuring the feeder forming space, Since the required number of annular mold members are stacked and the disc-shaped mold member is placed on the upper surface of the annular mold member disposed at the upper end, heat conduction becomes difficult in the mold portion where the riser forming space is II.

Therefore, by using this molding device, it is possible to ensure that the feeder has excellent heat retention properties.

In addition, in the mold apparatus of the present invention, the gaps between the contact surfaces between the annular mold members and the contact surfaces between the annular mold member and the disc-shaped mold member can be used for gas venting during pouring, and the gaps between the annular mold members and the disc-shaped mold member can be used as gas vents during pouring. Since the members can move independently, if they are made movable in the installed state, the hot water film can be easily destroyed by applying vibrations.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the molding device according to the present invention, Fig. 2 is an enlarged sectional view of the middle part in Fig. 1, Fig. 3 is a bottom view of the disk-shaped mold member in Fig. 2, and Fig. 4. 3 is a bottom view of the annular mold member in FIG. 2; FIG. 2... Cavity S... Feeder forming space disc-shaped mold member Fig. 2 Fig. 3

Claims (1)

[Claims] (1) In a mold device equipped with a feeder forming space communicating with a cavity, in configuring the feeder forming space, a required number of annular mold members and a sole disc-shaped mold member are provided, and the required number of A mold apparatus characterized in that annular mold members are stacked and the disc-shaped mold member is placed on the upper surface of the annular mold member disposed at the upper end.