JPH039876Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a fugitive model for casting, a material that disappears due to the heat of molten metal, such as foamed synthetic resin such as so-called expanded polystyrene resin, and is used to create a predetermined shape. This relates to a device for forming a fugitive model (111/4° curved pipe) for vacuum casting.

``Prior art and its problems'' By the way, in order to form a fugitive model (hereinafter referred to simply as a model) of a 111/4° bent pipe for cast water pipes, conventionally a fixed mold device and a one-way moving mold were used. It is difficult to manufacture because it is combined with a molding device.

Moreover, in Utility Model Application No. 62-29842, filed by the present applicant, a device for forming a fugitive curved pipe model for casting is proposed, the gist of which is that the first It consists of a combination of a movable mold device, a second movable mold device that moves from an oblique direction, and a third movable mold device that moves with an approximately 45° arc trajectory facing the second movable mold device. It is a mechanism.

Although this mechanism is optimal for models where the bending angle of the bent pipe is large, it is unsuitable for models where the bending angle of the bent pipe is small.

Therefore, the work involved is to mold divided models, match the divided models after molding, and join the seams with adhesive tape or the like.

This is extremely troublesome and time-consuming, and the workability is extremely poor.

It also causes an increase in product costs.

There are other issues.

Additionally, adhesive tape residue remains on the cast product, causing quality deterioration. Further, post-processing of the adhesive tape pasting marks is required, which may also pose problems such as requiring time and manpower.

``Means for Solving the Problems'' Therefore, the present invention is to provide a device that can automatically take a 111/4° curved pipe model in one piece (a model without bonding).

The gist is a fixed one-sided mold in which a curved pipe installed at the bottom of a long frame is cut in half in the longitudinal direction, raw materials,
A fixed mold device equipped with high-pressure steam and cooling water supply pipes, and one side of the fixed mold device facing the mold, and extending in the front-rear direction along a guide rod provided on the frame via a cylinder. A support plate that can move back and forth and is provided with a movable mold on the other side, which is a curved pipe that is half-cut in the longitudinal direction and that merges with the mold on the one side at its advancement limit to form a union space, and this support plate. A first movable mold device comprising a stop means for controlling the stopping of the first movable mold device, a mold on the other side of the first movable mold device, and a mold on one side of the fixed mold device on an extension line of the combined position of the horizontal plane. For a movable expansion part that is arranged and moves diagonally along a guide rod provided diagonally on the frame via a cylinder, and is inserted into the expansion part in the combination space at its advancement limit. a second movable mold device comprising a movable support plate provided with a core and a stop means for stopping the support plate;
Disposed so as to face the expansion core of the movable mold device, and inserted into the combination space, and integrated with the expansion core, a fugitive material is placed in the combination space. A movable tube core that moves along an arcuate trajectory forming a model space, and a oscillation pivotably mounted on a pivot at the upper end of the frame on which the tube core is installed. A device for molding a fugitive curved pipe model for casting, which comprises a moving plate, a cylinder controlling the swinging of the swinging plate, and a third moving mold device comprising a stopping means controlling the stopping of the swinging plate. It is.

"Operation" Next, the operation of the present invention will be described. When the control device (not shown, the same applies hereinafter) is turned on, the cylinder of the first movable mold device is activated.

As a result, the first movable mold device advances sequentially (in Fig. 1, from the front toward the back, forward toward the back), and when it reaches its forward limit, it is combined with the fixed mold device, and It is stopped by the action of the limit switch.

Through this combined relationship, the mold on one side of the fixed mold device and the mold on the other side of the first movable mold device form the entire outer surface in the longitudinal direction of the curved tube, and a combined space is formed here. be done.

At this time, the cylinder of the second movable mold device is actuated by the action of a time switch (not shown, the same applies hereinafter), and its piston rod moves forward.

Through this advancement of the piston rod, the support plate and, accordingly, the core for the expansion portion move forward in sequence (from the right side to the left side in Fig. 1).
Then, it enters the expanded portion of the combined space.

When it reaches its forward limit, it is inserted into the expanded portion of the combined mold and stopped by the action of the limit switch.

Then, at this time, the cylinder of the third movable mold device is activated by the action of the time switch, and its piston rod moves forward.

Through the advancement of this piston rod, the rocking plate
The pivot point at the upper end of the frame is used as a fulcrum to swing (swing in an arcuate trajectory of 111/4 degrees, the same applies hereinafter), and the pipe core is attached to the swing of this swing plate. , sequentially move forward (in FIG. 1, move forward from the left side to the right side; the same applies hereinafter), and enter the pipe portion of the combined space.

When it reaches its forward limit and is stopped by the action of the limit switch, it is integrated with the expansion core inserted into the combined mold, and this pipe core and the expansion core are combined. , a sixth
A vanishing model space (hereinafter simply referred to as model space) shown in the figure is formed.

In this state, a predetermined amount of raw material is supplied into the model space through the supply pipe, and this model space is filled with the raw material. Thereafter, high-pressure steam is supplied into the model space through a supply pipe (not shown, the same applies hereinafter), a model is formed, and cooling water is radiated onto the formed model.

Through the above operations, a 111/4° curved pipe model is formed in the combined mold (model space).

Next, due to the action of the time switch, the cylinder of the third movable mold device operates, and through the contraction of the piston rod, the rocking plate swings in the opposite direction (from the right to the left in Figure 1). (the same applies hereafter), the core for the pipe section will move backward one by one,
When the retraction limit is reached, the limit switch will stop the movement.

Through a similar operation, the cylinder of the second movable mold device is actuated, and the support plate swings in the opposite direction (from the left to the right in Fig. 1) through the contraction of the piston rod. retreat, the same applies hereafter),
The expanding portion core gradually retreats, and when it reaches its retreat limit, it is stopped by the action of the limit switch.

After the cores integrated through the above operations are separated, they are each removed, and the model is held between the fixed mold device and the first movable mold device.

Thereafter, the cylinder of the first movable mold device operates, and the support plate swings in the opposite direction as described above through the contraction of the piston rod. The same applies hereafter), and the mold on the other side is sequentially retracted, and when it reaches the retraction limit, it is stopped by the action of the limit switch.

As a result, the joining space is opened and the molded model is held in the mold on one side of the fixed mold device, so in this example, the work is done manually.
Remove the curved pipe model at °.

By repeating the above operations and supplying raw materials and removing the models, the models are sequentially removed.
Shape automatically.

``Example'' The drawing shows an example of the present invention. In the drawing, 1 is a long frame made of steel,
A fixed mold device A is provided on one side of the lower part of the frame 1 (the upper side in FIG. 4, the same applies hereinafter). The entire mold provided on the support plate 2 is divided into 1/2, and a fixed one-sided mold 3 is formed by cutting a curved pipe of 111/4 degrees in half in the longitudinal direction.

One end of the raw material supply pipe 5 communicates with the hopper 4, and the other end of the raw material supply pipe 5 communicates with the fixed mold device A.

The fixed mold device A is connected to supply pipes for high pressure steam or cooling water through switching valves.

Further, on the other side of the frame 1 (the lower side facing in FIG. 4, the same applies hereinafter), a first movable mold device B is provided at a position facing the fixed mold device A.

This first movable mold device B includes four guide rods 6 extending between the inner surface on one side and the inner surface on the other side of the lower part of the frame 1, and is supported on the guide rods 6 and attached to the frame 1. A support plate 9 moves forward and backward along the guide rod 6 through the piston rod 8 of the cylinder 7 (in FIG.
and a movable other-side mold 10 which is a 111/4° curved tube cut in half in the longitudinal direction, which is obtained by dividing the entire mold provided on the support plate 9 into 1/2. In the figure, reference numeral 11 denotes a bar provided on the support plate 9. This bar 11 moves in conjunction with the support plate 9, and has a dog 12 fixed to its tip. The cylinder 7 is also provided with a forward limit limit switch LS1 and a backward limit limit switch LS2.

The bar 11, the dog 12, and the limit switches LS1 and LS2 constitute a stopping means.

Although not shown, a supply pipe for high-pressure steam or cooling water is connected to the first movable mold device B.

Further, on the right side of the frame 1 (the right side when facing in FIG. 1, the same applies hereinafter) and on the extension line H of the combined position of the horizontal plane of the fixed mold device A and the first movable mold device B, A second moving mold device C is provided.

This second movable mold device C is installed in parallel with a mounting frame 13 for mounting a guide bar provided on the right inclined portion 1a of the lower part of the frame 1, and the extension line H provided on this mounting frame 13. four guide rods 1
5 (however, it also serves as support for a mounting plate to be described later), a mounting plate 16 fixed to the upper end of this guide rod 15,
A support plate 19 that is inserted through the guide rod 15 and moves forward and backward diagonally along the guide rod 15 via the piston rod 18 of the cylinder 17 attached to the mounting plate 16, and the combination provided on the support plate 19. A combined space E formed by the mold 3 on one side of the fixed mold device A and the mold 10 on the other side of the first movable mold device B (forming the entire outer surface in the longitudinal direction of the curved pipe) The core 20 for the expanded portion is inserted into the expanded portion of the 111/4° curved pipe.

In the figure, reference numeral 21 denotes a bar provided on the support plate 19. This bar 21 moves in conjunction with the support plate 19, and has a dog 22 fixed to its tip. In addition, cylinder 17 has a limit switch LS at the forward limit.
3 and a reverse limit switch LS4 are provided.

The bar 21, the dog 22, and the limit switches LS3 and LS4 constitute a stopping means.

Although not shown, this second movable mold device C is connected to a supply pipe for high-pressure steam or cooling water.

Further, a third movable mold device D is provided on the left side of the frame 1 (the left side when facing in FIG. 1, the same applies hereinafter) at a position facing the second movable mold device C.

This third movable mold device D includes a pivot shaft 25 extending between the upper end 1b of the protruding central portion of the frame 1 and between the one side surface and the other side surface, and a pivot shaft 25 connected to the pivot shaft 25 via a bracket 24. a swinging plate 28 that swings about its pivot 25a as a fulcrum through a piston rod 27 of a cylinder 26 attached to the left end 1c of the frame 1; A so-called 111/ It is composed of a pipe core 29 that constitutes the inside of the pipe part of the 4° bent pipe.

In the figure, 30 is the clevis deviation 2 of the piston rod 27.
This rod 30 moves in the same way as the swing plate 28 via the piston rod 27, and has a dog 31 fixed to its rear end. In addition, the cylinder 26 has a forward limit limit switch LS5 and a reverse limit limit switch LS.
6 is provided.

The bar 21, the dog 22, and the limit switches LS5 and LS6 constitute a stopping means.

Although not shown, this third movable mold device D is connected to a supply pipe for high-pressure steam or cooling water.

Next, the operation of the present invention will be explained with reference to the schematic diagram in FIG. 5. In the state shown in FIG. When the device is turned on, the other side mold 10 is moved forward by the cylinder 7, and at the same time, the bar 11 is moved forward, so that its dog 12 comes into contact with the limit switch LS1 at the forward limit.

As a result, the other side mold 10 stops at the forward limit (this is the so-called combined position), and the other side mold 10 is combined with the one side mold 3 of the fixed mold device A.
The state shown in FIG. 3B is reached, where a combined space E is formed.

At this time, due to the action of the time switch, the second movable mold device C moves diagonally downward by the cylinder 17, and at the same time, the bar 21 moves forward, so that the dog 22 reaches its forward limit. Close to limit switch LS3.

As a result, the second movable mold device C stops at the forward limit, and the expanded portion core 20 of the second movable mold device C is inserted into the expanded portion in the longitudinal direction of the combined space E from a slightly oblique direction. Then, the protrusion 19a of the support plate 19 is combined with the right end surface of the mold 3 on one side of the fixed mold device A and the mold 10 on the other side of the first movable mold device B, which are in the combined relationship. . As a result, the right side of the combined space E is closed, resulting in the state shown in FIG.

At this time, due to the action of the time switch, the swing plate 28 of the third movable mold device D moves the pivot portion 25a at the upper end 1b of the elongated frame 1 through the extension of the piston rod 27 of the cylinder 26. As a fulcrum, it moves forward with an arcuate trajectory of 111/4 degrees.

As a result, the pipe core 29 attached to the rocking plate 28 moves forward in sequence, and at the same time, the bar 30 moves forward, so that the dog 31
touches limit switch LS5 at the forward limit.

As a result, the third movable mold device D stops at the forward limit, and the tube core 29 of the third movable mold device D is inserted into the tube portion in the longitudinal direction of the combination space E from a slightly oblique direction.
The protrusion 28a of the swing plate 28 is inserted into the left end surface of the mold 3 on one side of the fixed mold device A and the mold 10 on the other side of the first movable mold device B, which are in the combined relationship. are combined.

As a result, both sides of the right and left sides of the combined space E are closed, and the model space F is formed here, resulting in the state shown in Fig. 2 (Fig. 1 to 4, and Fig. 6) ).

Then, the raw material of the hopper 4 is supplied to this model space F via the supply pipe 5, and this model space F is filled with the raw material.

Then, high pressure steam is supplied to heat and foam the raw material.

Thereafter, the supply of high-pressure steam is stopped, and cooling water is radiated onto the molded model to cool the molded model.

Then, due to the action of the time switch, the piston rod 27 of the cylinder 26 contracts (retreats, the same applies hereinafter), and the pipe core 29 moves backward along the aforementioned 111/4° arcuate trajectory, thereby moving away from the molding model. The pipe core 29 is removed. At the same time, the bar 30 moves backward, so that the dog 31 comes into contact with the backward limit switch LS6.

As a result, the pipe core 29 that has been in the insertion relationship is released, and is brought to the state shown in FIG.

Then, by the action of the time switch, cylinder 1
By the contraction of the piston rod 18 of No. 7, the expanding portion core 20 is moved diagonally upward and backward, whereby the expanding portion core 20 is removed from the molding model. At the same time, the bar 21 moves backward, so the dog 22 switches the limit switch for backward movement.
Touches LS4.

As a result, the expanded portion core 20 that was in the insertion relationship is released and is brought into the state shown in the figure, which is located at the retraction limit.

Next, due to the action of the time switch, the piston rod 8 of the cylinder 7 contracts, causing the mold 1 on the other side to
0 moves back and forth in the horizontal direction, the curved pipe and other side mold 10 is removed from the molding model. At the same time, the bar 11 moves backwards, so the dog 12 switches the limit switch LS2 for moving backwards.
be in contact with

As a result, the other side mold 10 that was in the above-mentioned union relationship is removed from the mold, and the other side of the curved pipe is opened, and the pipe is brought into the initial state shown in FIG.

In this way, the mold is opened and the molded model is removed from the mold 3 on one side of the fixed mold device A.

The operations detailed above are sequentially repeated to form models one after another.

``Effect of the invention'' As detailed above, the present invention divides the mold that constitutes the outer part of the curved pipe into two parts, and when the two divided molds are combined, the expanded part of the mold is divided into two parts. A model space is formed by inserting a core for the expansion part into the core and a core for the pipe part into the pipe part, and raw materials, high pressure steam, etc. are supplied to this model space to perform molding and cooling. , after which it is demolded and separated.

Therefore, this type of model can be assembled in one piece, which was previously considered impossible, and this also eliminates the work of pasting adhesive tape, improves workability, and reduces product costs. It has practical effects, such as being useful for people, and is useful for improving quality.

In addition, the present invention is characterized in that the support plate provided with the tube core moves back and forth along the guide rod, and the rocking plate provided with the tube core oscillates around a pivot provided in the frame. The supporting plate and the rocking plate are configured to move at a set position via a stopping means.

As a result, the expansion part core and the tube part core to be inserted into the combined space can be inserted reliably and smoothly, and both the cores can be stopped at the set positions. This has the effect of forming a completed core with integrated set dimensions, and ultimately it can be expected that both cores will be inserted smoothly, and that the dimensional accuracy of the model will be consistent and the same accuracy will be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view, Fig. 2 is a left side view, Fig. 3 is a right side view, and Fig. 4 is a sectional view taken along the line X-X of Fig. 1. , FIGS. 5A to 5F are schematic diagrams showing the operating state, and FIG. 6 is an enlarged plan view showing the relationship between the mold and the core. 1: Frame, 2, 9, 19: Support plate, 3: One side mold, 4: Hopper, 6, 15: Guide rod,
7, 17, 26: cylinder, 8, 18, 27:
Piston rod, 10: Other side mold, 11, 2
1, 30: Bar, 12, 22, 31: Dog, 1
3: Mounting frame, 16: Mounting plate, 19a, 28a: Projection, 20: Core for expansion part, 25: Pivot, 25
a: Pivot joint, 29: Pipe core, LS1 to LS6:
Limit switch, A: Fixed mold device, B: 1st
Moving mold device, C: Second moving mold device, D: Third
Moving mold device, E: Combination space, F: Model space.

Claims (1)

[Scope of utility model registration request] A fixed one-sided mold in which a curved pipe provided at the bottom of a long frame is cut in half in the longitudinal direction, and raw materials.
A fixed mold device equipped with high-pressure steam and cooling water supply pipes, and one side of the fixed mold device facing the mold, and extending in the front-rear direction along a guide rod provided on the frame via a cylinder. A support plate that can move back and forth and is provided with a movable mold on the other side, which is a curved pipe that is half-cut in the longitudinal direction and that merges with the mold on the one side at its advancement limit to form a union space, and this support plate. A first movable mold device comprising a stop means for controlling the stopping of the first movable mold device, a mold on the other side of the first movable mold device, and a mold on one side of the fixed mold device on an extension line of the combined position of the horizontal plane. For a movable expansion part that is arranged and moves diagonally along a guide rod provided diagonally on the frame via a cylinder, and is inserted into the expansion part in the combination space at its advancement limit. a second movable mold device comprising a movable support plate provided with a core and a stop means for stopping the support plate;
Disposed so as to face the expansion core of the movable mold device, and inserted into the combination space, and integrated with the expansion core, a fugitive material is placed in the combination space. A movable tube core that moves along an arcuate trajectory forming a model space, and a oscillation pivotably mounted on a pivot at the upper end of the frame on which the tube core is installed. A device for molding a fugitive curved pipe model for casting, which comprises a moving plate, a cylinder controlling the swinging of the swinging plate, and a third moving mold device comprising a stopping means controlling the stopping of the swinging plate. .