JPS647008Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on the forming of a sprue mold in a casting mold,
In particular, it relates to a surface plate used for vibration modeling.

In upright molds such as roll casting molds, the overall length of the sprue is usually 2 to 12 m.
It is constructed by joining together many sprue molds of 0.5 to 2 m in length. A sprue is constructed by burying a sprue pipe in the center of each sprue mold, but if there is a misalignment due to misalignment of the sprue pipe at the connection part of the sprue mold, the molten metal will flow when it passes through the sprue pipe. This creates turbulent flow, gives extra impact to the sprue, accelerates melting and damage of the sprue, and lowers the quality of the casting due to the entrainment of slag, sand, gas, etc.

Multiple sprue molds are used for one mold, and if the sprue pipes were aligned for each sprue mold of a large number of molds during molding, it would take a lot of man-hours for molding, which would reduce productivity. I had a problem with it not rising.

The present invention is efficient in that when molding a sprue mold, a large number of sprue frames can be placed on the molding surface plate at the same time, and a sprue frame positioning tool that allows the core of the sprue pipe relative to the sprue frame to be set easily, accurately, and quickly. The present invention provides a surface plate for vibration modeling.

The present invention will be explained in detail based on the drawings. Figures 1 and 2 are a plan view and a side view of the positioning tool used in the present invention, and Figure 3 shows a sprue mold (only one is shown) on the surface plate of the present invention on which the positioning tool according to the present invention is attached. A plan view of the mounted state, and FIG. 4 is a longitudinal cross-sectional view taken along - in FIG. 3.

1 and 2, the positioning tool 1 used in the present invention has the shape of a truncated pyramid with a base 1' of k and a height of h. If this is placed on the molding surface plate 3, the outer circumferences of the lower flanges 2 and 2' of the sprue frame 6 will each touch the base 1' of the truncated pyramid, so that the spacing l between the flanges of adjacent sprue frames will be maintained. . Further, since it has the slope 1'', the sprue frame 6 suspended by a hoist or the like can be lowered onto the molding surface plate 3 and positioned and erected smoothly.

In the sprue mold molding surface plate of the present invention, as shown in the embodiments of FIGS. 3 and 4, a positioning tool 1 is placed on a molding surface plate 3 having a hole 4 provided for installing a sprue pipe 7. has been done. Reference numeral 5 denotes an alignment pin for installing the sprue pipe 7, and by standing the sprue pipe 7 on top of this, the sprue frame 6 and the sprue pipe 7 are automatically aligned. That is, so that the core of the sprue frame 6 is arranged to match the core of the sprue pipe 7, a truncated pyramid-shaped positioning tool 1 is placed on the molding surface plate 3 in a position corresponding to the outer circumferential position of the lower flange 2 of the sprue frame 6. By arranging the sprue frame 6 in advance, the sprue frame 6 can be placed accurately without causing misalignment. When molding a sprue mold, first, the sprue frame 6 suspended by a hoist or the like is lowered into a space surrounded by four positioning tools 1. In this case, even if it is not exactly above the four positioning tools 1 in the suspended state before being lowered, the positioning tools 1 have
Since the slope 1'' is provided, the outer periphery of the lower flange 2 of the sprue frame 6 is lowered along this slope 1'',
Finally, it comes to be placed in the area surrounded by the four positioning tools 1 mentioned above.

Next, the sprue pipe 7 is set upright on the centering pin 5, and its upper end is fixed at the center of the sprue frame 6 using another centering tool 8 at the upper flange 2''. Sand 9 is filled between the sprue pipe 7 and the sprue pipe 7.
The sprue mold is completed by vibration molding.

When trying to construct a sprue by adding these sprue molds, by aligning the cores on the outer surface of the sprue frame 6, the cores of the internal sprue pipe 7 can be aligned.
This means that there is no misalignment of cores at the joints of each sprue type. In addition, depending on the arrangement position, there are
Positioning tool 1 according to the present invention divided into two parts 1
By using 1b divided into 1a or 1b, alignment can be easily performed.

Positioning tools 1, 1a, 1 described in the above embodiments
b is of a type in which each side is in contact with the outer periphery of the lower flange 2 of the sprue frame 6, respectively. However, as shown in the embodiments of FIGS. 5 and 6, a positioning tool 1c having an inclined surface 1" disposed between the lower flanges 2 of two adjacent sprue frames 6 also has the same effect. In addition, in the above embodiments, a shape with a rectangular bottom was shown, but the same applies to other shapes based on pyramids or cones with sloped sides. That is clear.

As described above, by using the surface plate for molding sprue molds of the present invention, it is possible to greatly reduce the molding man-hours associated with centering the sprue pipes of sprue molds for casting molds, especially for a large number of upright molds, and, It has become possible to improve the accuracy of alignment without any special allowances.

[Brief explanation of the drawing]

Figures 1 and 2 are a plan view and a side view of the positioning tool used in the present invention, Figure 3 is a plan view of the sprue mold placed on the surface plate of the present invention, and Figure 4 is the
A vertical sectional view taken along the line - in the figure, and FIGS. 5 and 6 are a plan view and a side view showing examples of the shape and arrangement of other positioning tools according to the present invention. 1, 1a, 1b, 1c...positioning tool, 1'...
…bottom, 1″…slope, 2,2′…lower flange,
2″...Top flange, 3...Modeling surface plate, 4...
Hole, 5... Centering pin, 6... Sprue frame, 7... Sprue pipe.

Claims (1)

[Scope of utility model registration request] It is characterized by having a positioning tool installed at a position corresponding to the outer periphery of the annular flange on the lower end side of the sprue frame and having a sloped side surface, and a sprue pipe standing part surrounded by these positioning tools, and used for vibration molding. A surface plate for forming sprue molds.