JPS59125263A - Die releasing device - Google Patents

Abstract

PURPOSE:To separate a casting mold in a short time without damaging the product part from the product produced by multiple-piece casting by hammering a runner and transmitting many impact oscillations to the product part. CONSTITUTION:As a cam 9 rotates, an arm 5 and an impact hammer 4 are gradually forced upward, and gravity energy and the compressive energy of a coil spring 15 are accumulated. When a roller 8 is disengaged from a step part 9b, the accumulated energy is converted to the kinetic energy of the arm 5 and the hammer 4. Even if the supply of the energy from the spring 15 ends, the arm 5 and hammer 4 continue to move against a spring 11C until finally the hammer 4 strikes a casting 1 via a cap 3. The hammer 4 is escaped to provide a clearance C1 between the cap 3 and the hammer 4 by a lifting unit 11, so that the oscillation generated in the casting by the blow is not absorbed by the hammer 4. When the similar hammering operation is continued, the casting mold of a product part 1d is separated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for separating a mold from a cast product, and in particular to a device for separating a product from a ceramic shell or plaster mold for precision casting of a small and complex shape.

Conventional methods for breaking molds of castings include (1) a pneumatic hammer method that uses a large number of strikes but uses a relatively small carrier, and (2) a striking method that uses strong impact force.

In the pneumatic hammer method (1), the energy per impact is small, so it is necessary to apply the pneumatic hammer to the part to be demolded.

In the case of multi-cavity castings, it is difficult to arrange pneumatic hammers according to each product part because of the large number of parts. On the other hand, the striking method (2) has the advantage that a strong striking force is applied to the casting, so that the demolding time is short. When the casting is fixed to a stand, the vibration energy generated in the casting is quickly absorbed by the stand, and in the case of a product with a complex shape, the mold cannot be removed sufficiently from the product. In addition, the first
As shown in the figure, water is sprayed onto the cap placed over the runner 1b of the casting 1 even after the impact. By hitting the yudoju instead of the product part, more impact vibration is transmitted to the product part. In particular, the object of the present invention is to provide a demolding device that can quickly demold precision cast products of small, complex shapes and many molds.

The purpose of this is to use a batting line that hits a cast runner held on a work stand, an arm that has the batting line at its tip and is rotatably attached to a frame, and a device that periodically drives the arm. This is achieved by a mold disassembly device 1 characterized in that it has a hammer moving body generation source attached to a frame frame, and an elastic member that acts on the batted ball line and separates the batted ball line from the casting immediately after hitting. Ru.

Hereinafter, embodiments based on the present invention will be described in detail with reference to the drawings.

FIG. 2 shows a first embodiment. 1 is a casting with a mold. The casting 1 is placed with the sprue la facing down.

On top of that, there are many hot water weirs I around runner 1%b and 9 runner 1b.
A sprue 1a is formed on the runner 1b from C and the product part 1d.
A cap selected according to the length of the runner 1b is placed on the sprue 1b, and is held by a work stand 2 which supports the sprue 1a and the capper with a clearance from the outer periphery thereof.

A ball hitting line 4 that hits the tm path 1b of the casting 1 in the axial direction through the cap is provided at the tip of an arm 5 rotatably attached to the frame 6.

A bracket 7 is provided at the lower center of the arm 5 and has a roller 8 attached thereto so as to be rotatable once. Below the roller 8, a cam 9 rotated by an electric motor with a speed reducer (not shown) is rotatably attached to the frame 6.

On the outer circumference 9a of the cam 9, the cam height increases uniformly except for one stepped portion 9b.

Further, on the left side of the bracket 7, an arm 5 is installed on the bracket 6a provided on the frame 6 in order to prevent the single-port cap 8 from colliding with the cam 9 in the event of malfunction without a cap lar attached. A rubber plate 10 is provided with a gap C1 between the bottom surface and the gap C1.

Immediately after the impact, the arm 5 is connected to the base 11 having the upper and lower brackets Ilb and Ic attached to the front plate 6b of the frame 6, and the upper and lower brackets 6a so that the impact vibration of the i# structure 1 is not absorbed. coil spring l placed in
id, is connected to the lower bracket 1ic with a nut 11f, and is guided by the upper bracket.
Adjust the gap C1 between the cap and the cap.

In order to apply a hitting energy of more than 1 gravity to the batting line 4, the frame 61 is taunted above the arm 5, and the corner, K
Adjust the adjustment bolt 1, turn 7 frame 6 and turn 11
Install the rotation bracket 12 for ft+lJN.

and a spring receiver 14 attached to the upper surface of the arm 5.

I have 4txil IPL. Furthermore, coil spring 15 → ÷ seven shells ≠
In order to lighten the burden on the coil spring shell C that lifts the batting groups 4 and 7-5 * IIQI spring receiver 14. Immediately after the coil spring 15 is actuated by the tie rod 17 with the adjusting nut 18 between the two, the arm 5 is lifted up by the lifting bin lid, and a gap is created between the outer periphery 9a of the cam 9 and the roller 8. C2 exists. As the cam 9 rotates, the gap C2 disappears, and the arm 5 and the ball hitting line 4 are arranged so that the roller 8 is aligned with the stepped portion 9b.
Off to Otsu.

It is gradually pushed up and one gravitational energy and the compression energy of the coil spring 15 are stored. When the roller 8 comes off the stepped portion 9b, the stored energy is converted into kinetic energy of the arm 5 and the ball hitting line 4, and even if the energy supply from the coil spring 15 is finished, the coil spring 7 moves against the coil spring IC. -M 5 and batting line 4 continue their movement and finally.

A batting line 4 hits the casting 1 through the cap. Immediately after the impact, the hammer is lifted up by the lifting unit.
A gap C1 between the cap and the batting line 4 is used to release the vibrations generated in the casting due to hitting.

I'm trying not to absorb the blow. If the same striking action is continued 20 times per minute for about 5 minutes, the product force will be sufficiently separated from the mold in the part ID.

FIG. 2 shows a second embodiment in which the arm 5 of the first embodiment (FIG. 2) is divided into two parts, and a lifting mechanism is interposed between the two parts. In the second embodiment, the rubber plate 10, which was used to prevent collision between the roller 8 and the cam 9, is thickened and comes into contact with the main arm 5a just before the end of the striking stroke. An auxiliary arm 5 is rotatably attached near the tip of the main arm 5a.
b is fitted with the striking hammer 4 at its tip. both arms 5
The bolt 5d that passes through the coil spring 50 provided on the main arm 5a and the fill spring 5a is
The upper end of the main arm 5al engages with the lower surface of the auxiliary arm 5b, and the tip of the adjustment bolt 5e screwed into the main arm 5al and the auxiliary 7-
The upper surface of the frame 5b is in contact with the upper surface of the frame 5b. By proceeding in this way, the main arm 5a touches the rubber plate 10 at the end of the striking stroke.
When it comes into contact with the tip of the auxiliary 7-m 5b (blow
) is the opposite of the coil spring 5 ÷, and only the camp C1 is 1
Continuing 111 rolls.

Hit Cap 5. Further, in the tie rod 17 of the first embodiment, which nullifies the action of the coil spring 15 for adding impact energy immediately before impact, the main arm 5a is attached to the rubber plate 10.
It's important to be in contact with this.

It has the advantage of being unnecessary. Other structures and operations are similar to those of the first embodiment shown in FIG. still.

The same applies if the striking hammer changes from a rotational motion to a linear motion with respect to the main arm 5a.

FIG. 4 shows a fifth embodiment in which the lifting mechanism of the second embodiment (FIG. 3) is modified. A coil spring 5g is attached to the tip of an arm 5f which is in a rotational relationship with the frame 6, and a spherical striking hammer 4 is attached to the other end of the coil spring 5g. A stopper bolt with rubber is screwed into the arm 5f so as to come into contact with the bracket 6a provided on the arm 5f. Other structures and operations are similar to the second embodiment shown in FIG.

As shown in Table 1, the effect is the same even if the hitting direction is set to 1 other than 1 from the top, for example, to the water direction.

Next, Table 1 shows the degree of demolding for each demolding device. In Table 1, experiment numbers (1) and (2) indicate the results of experiments using the mold breaking apparatus of the 82nd embodiment and the 1st embodiment of the present invention, and experiment number (3) indicates the results of the experiments using the mold breaking apparatus of the 82nd and 1st embodiments of the present invention. The results of experiments using the mold breaking device are shown, and the experiment number (April) shows the results of experiments when a pneumatic hammer is applied to a runner sea urchin and excited. When the numbers are set as shown in the table, the mold disassembly results of experiment numbers (1) and (2) of the present invention are less than or equal to X/2 compared to experiment numbers (3) and (4) of the conventional technology. The result was determined by time.

As is clear from the above description, the mold release device according to the present invention has the effect of being able to separate molds from a multi-cast product in a short time without damaging the product parts.

[Brief explanation of the drawing]

FIG. 1 shows a conventional impact-type demolding device, and FIG. 2 shows a first embodiment of the demolding device according to the present invention. FIG. 5 shows the second embodiment, and FIG. 4 shows the fifth embodiment. 1...Casting, 2-...Work stand, 5°°° cap, 11...Blow hammer, 5.5M, 5f...Arm or main 7-A, 5b...Auxiliary arm, 6 ...Fram, 8...Roller, 9...Cam, 11...
Lifting unit, 11d, 50.5g... Coil spring Applicant: Toyota Motor Corporation

Claims (1)

[Claims] (1) A striking hammer for striking a runner of a casting held on a work stand, and a hammer having the striking hammer at its tip. and an arm rotatably attached to the frame, a hammer motion extension generator attached to the frame that periodically drives the arm, and a hammer motion extension generator that acts on the striking hammer to generate the force immediately after striking. A demolding device characterized by having an elastic member for separating a hammer from a casting.