JPS5814027Y2 - Mounting structure of sprue spool mold in mold making machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for a sprue spool mold for forming a molten metal injection port in a mold making machine.

In a mold making machine, for example, a segment type machine, as schematically shown in Fig. 1, upper and lower sets of models A and A are fixed to each other, and one model A is provided with a molten metal injection path (
A pattern plate C9C with a sprue rod B projecting thereon for forming a sprue (spool) is placed on the master plate D, and flasks E and E are set on this pattern plate C9C, respectively. Fill E with molding sand S.

After leveling the upper surface of the foundry sand S, the segment cylinders F, F, etc. are operated downward.
Segment hoods G and G attached to the lower end of this...
The molding sand S is pressed against the upper surface of the molding sand S, and the cylinder H connected to the lower surface of the master play D is applied upward to compress and mold the molding sand S. At this time, the upper end of the sprue rod B is pressed. Segment hood G, G with nearby foundry sand S
A spool mold 1 attached to a part of .

Conventionally, the current spool 1 has been integrally formed with a mounting plate 2 as shown in FIG. ...
・However, in this case, if the current model of the spool needs to be changed due to changes in production items, bolt 3
, 3, etc. must be removed, replaced with another spool model, and bolts 3, 3, etc. must be tightened again, which takes a long time to replace, resulting in a large production loss. Ta.

At this time, pattern play) C, C and flasks E, E
It is also necessary to replace the spool 1, but since various automatic replacement devices have been developed and this replacement can be done in a short time, replacing the spool 1 above is a major bottleneck in production. The current situation was that

In view of the above, this invention enables the replacement of the current spool type in a short time.
Moreover, it was devised to provide something that could be done reliably, and its gist was to form the spool mold and the mounting plate separately, and to make sure that the upper surface of the spool mold and the lower surface of the mounting plate were in contact with each other. The present invention provides a mounting structure for a sprue spool in a mold making machine, characterized in that both are configured so that they can be attached and detached at will.

This will be explained in detail based on the embodiments shown in FIG. 3 and below. 11 is a spool model, and 12 is a mounting plate, which are each formed separately, unlike conventional ones.

The upper surface of this spool model 11 and the lower surface of the mounting plate 12 are configured so that they can be attached and removed, but in the embodiment shown in FIG. 3, the thickness of the mounting plate 12 is made sufficiently thick. At the same time, a dovetail groove 12a is formed on the lower surface of the spool mold 11, and a protrusion 11a that can freely engage with the dovetail groove 12a is provided on the upper surface of the spool model 11 to achieve this. Fourth
As shown in Figure A, there is a dovetail groove 11 on the top surface of the spool mold 11.
b, and a protrusion 12b may be provided protruding from the lower surface of the mounting plate 12, and a protrusion 11C having a T-shaped cross section may be provided on the upper surface of the spool mold 11, as shown in the opening in the figure. The lower surface of the mounting plate 12 may be provided with locking pieces 12C and 12C facing each other, each having a hook-shaped cross section so as to be able to freely engage with the protrusion 11C. What is necessary is to engage the lower surface of 12 so that both can be attached and detached.

In addition, as shown in FIG.
A may be configured such that a plurality of rows (two rows in the illustration) are bored so that the retaining position of the spool mold 11 can be changed; Foundry sand S adheres to the inside of the unused dovetail groove 12a,
In order to prevent the spool mold 11 from becoming difficult to engage with this, a filler fitting 13 may be engaged in this.

Further, in the figure, since the lower surface of the mounting plate 12 can be made horizontal, many dovetail grooves 12a can be bored and the dovetail grooves 12a do not get in the way.

In addition, 14 is a hole bored at the rear end of the spool mold 11, and 15 is a hole bored at a corresponding position at the rear end of the mounting plate 12, in which the tip of the sprue rod B is positioned during mold making. ,
This is to prevent collision with the current spool 11.

Next, to explain how to use the present invention, first, the mounting plate 12
are attached to the segment hoods G, G, etc. using bolts 16, 16, etc.

Then, the spool mold 11 of any shape is engaged and fixed, and the mold making operation is performed in the same manner as described above.

At this time, even if there is play in the retaining portion due to machining errors, the molding sand S easily enters the gap during work, and this play can be eliminated.

When it is necessary to change the spool mold 11 due to changes in production items, etc., it can be easily removed by tapping the rear end of the spool mold 11 with a hammer or the like, and a different spool mold 11 can be used. This can be done in a short time by engaging.

Although the present invention has been described with respect to a segment type molding machine, it is of course applicable to any type of molding machine such as a flat plate type.

As mentioned above, the present invention includes the spool current model 11 and the mounting plate 1.
2 are formed separately from each other, and the upper surface of the spool mold 11 and the lower surface of the mounting plate 12 engage with each other so that both can be attached and detached, so that when the spool mold 11 needs to be changed, , it is only necessary to remove only the spool mold 11 from the mounting plate 12 and engage another spool mold 11 with the mounting plate 12, and the conventional work of removing and installing bolts is unnecessary, so it is a short process. It can be done in a timely manner and without requiring any skill.

Further, even if there is play in the securing portion between the two, the casting sand S can enter the gap during work and eliminate this play, thereby providing various effects such as making it possible to securely fix the two.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a segment casting machine, Fig. 2 is an exploded perspective view showing the mounting structure of a conventional spool model, Fig. 3 is a perspective view showing an embodiment of the present invention, Fig. 4 I9 The opening is a sectional view showing an example of how the current spool of each type is attached to the mounting plate. 11... Spool current type, 11 a, 11 C.
...Same protrusion, 11b...Same dovetail groove, 12.
...Mounting plate, 12 a...Dovetail groove, 12
b: Same protrusion, 12 C: Same locking piece, 13: Filling metal fitting.

Claims (4)

[Scope of utility model registration request] (1) A mold characterized in that the spool mold and the mounting plate are formed separately, and the upper surface of the spool mold and the lower surface of the mounting plate are engaged so that both can be attached and detached. Mounting structure of the existing sprue spool on the molding machine. (2) The scope of claims characterized in that a dovetail groove is bored on either the upper surface of the existing spool or the lower surface of the mounting plate, and a protrusion that can be freely engaged with the dovetail groove is provided on the other side. A mounting structure for the existing sprue spool in the mold making machine according to item 1. (3) A protrusion with a T-shaped cross section is formed on the upper surface of the current spool, and locking pieces with a hook-shaped cross section are provided facing each other on the lower surface of the mounting plate so that the protrusion can be freely engaged with the protrusion. A mounting structure for a sprue spool mold in a mold making machine according to claim 1. (4) A plurality of rows of engaging portions are formed on the lower surface of the mounting plate, and a filler metal fitting is engaged with an unused retaining portion. The mounting structure of the existing sprue spool in the mold making machine according to item 3.