JPH0326031B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for manufacturing die-cast parts for forming secondary conductors, short-circuit rings, etc. of a rotor for a rotating electric machine by an aluminum die-casting method.

[Technical background of the invention and its problems]

FIG. 1 is a sectional view showing an example of a conventional rotor manufacturing apparatus using a die-casting method. The die-casting machine has a fixed platen 1 and a movable platen 2 opposed thereto.
The left side of the fixed platen 1 above (the left side is all movable platen side)
Then, the fixed mold 3 is fixed so that the pouring hole 19a of the fixed platen 1 and the pouring hole 19b of the fixed mold 3 are aligned. A guide pin 14 and an angular pin 5 are made to protrude from the left side of this fixed mold 3. Further, a part of the outer periphery of the fixed mold 3 protrudes to the left, and this protruding inner surface is inclined to become a locking block 3a of the gate plate 9. Next, on the right side of the movable platen 2 (hereinafter all the right side is the fixed platen side), a mold 4a in the shape of a table with four legs is placed.
Fix it with the table surface facing the right side. There is a recess in the center right side of the table surface of this mold 4a.
In the center of this recess is a hole for the piston rod 6 to pass through. The movable platen side cavity 7 is buried in the recess. An intermediate mold 4b having an angular pin storage hole 5a and a guide pin guide hole 14a near the outer periphery is brought into contact with the right side of the table surface of the mold 4a with the opening of the angular pin storage hole 5a facing right. An intermediate inner ring 8 is disposed on the inner periphery of this intermediate mold 4b. Further, the right side of the intermediate mold 4b has an angular pin guide hole 5b and a guide pin guide bush 14b near the outer periphery, and a mandrel storage hole 15a and a groove forming a short circuit ring with the cooling blade in the center. The fixed plate side holder 4c is brought into contact with the angular pin storage hole 5a so that the angular pin guide hole 5b is aligned. Further, on the right side of the fixed plate side holder 4c, a gate plate 9 having a spout in the center and an angular pin guide hole 5c near the outer periphery is brought into contact. The movable mold 4 is formed by the mold 4a and the intermediate mold 4b, the fixed plate side holder 4c, and the gate plate 9. Mold 4
In a space on the opposite side of the table, an extrusion device 11 equipped with a piston rod 6 in the center having a stopper 10 at the shaft end is arranged with the stopper 10 on the right side and fixed on the opposite side of the table. This extrusion device 11 is operated by a solenoid valve 12 and a pressure source 13 according to separate commands.

Next, a method of die-casting aluminum into the slots of the rotor core using the above manufacturing apparatus will be explained. First, the hollow mandrel 1
5, a prescribed number of rotor plates having a plurality of slots on the outer periphery are laminated to form an iron core 16. This iron core 16 is inserted into the intermediate inner ring 8 with the intermediate mold 4b opened. Subsequently, when the movable mold 4 is moved to the right, the gate plate 9 is guided by the angular pin 5 and moves downward in FIG. Then, it comes into contact with the fixed mold 3, and the mold is closed by the locking block 3a, the gate plate 9, and the fixed plate side holder 4c that has moved at the same time. This operation causes the movable mold 4 and the fixed mold 3 to
Mold clamping is completed. At this time, the stopper 10 at the tip of the piston rod 6 is inserted into the hollow of the mandrel 15. Next, when molten aluminum is injected from the pouring hole 17 in the stationary platen 1, the plunger 18 passes through the pouring hole 19 and is press-fitted into the slot of the iron core 16 via the gate plate 9. After forming the secondary conductor of the iron core 16, the short-circuit ring, and the cooling blade 20, the movable mold 4 is moved to the left as shown in FIG. 2, and the mold is opened. At this time, the gate plate 9 is
It moves upward in FIG. 2 guided by the angular pin 5, and the cooling vane 20 and the gate plate 9 are sheared and separated. Next, when the solenoid valve 12 is actuated, pressure fluid is applied from the pressure source 13 to move the piston rod 6 to the right. Then, the piston rod 3 passes through the hollow of the mandrel 15 and reaches the gate runner section 21 attached to the gate plate 9.
is extruded and removed using a deposit 10. Furthermore, movable mold 4
The fixed plate side holder 4c and the gate plate 9 are
As shown in Figure 2, it stops at a position where it is not fully opened. Furthermore, the intermediate mold 4b of the movable mold 4 is slid out of the die-casting machine, and the iron core 16 is extruded and taken out by a separate extrusion device. And mold 4
Slide a to the left inside the die casting machine. This operation is repeated thereafter. In such a method, removing the gate runner portion 21 and extruding the core 16 after aluminum die-casting requires one die-casting machine and a separate core extrusion device, resulting in poor productivity. Furthermore, due to the precision of the machines, such as alignment of the slide bases or center alignment of the two machines, there is a drawback that problems such as product deformation occur during extrusion.

[Purpose of the invention]

The present invention has improved the above-mentioned drawbacks, and is a method in which the extrusion of the gate runner section is performed in conjunction with the molding operation, and furthermore, the core extrusion can be performed in the same machine.
The objective is to provide die-cast parts manufacturing equipment that improves the quality and productivity of aluminum die-cast parts.

[Summary of the invention]

The present invention has a fixed mold having a pouring hole therein, an angular pin projecting obliquely from one surface, and a guide pin projecting vertically, and an angular pin guide hole having a pouring hole inside and diagonally bored. A gate plate, a fixed plate side holder that has a product cavity, an angular pin storage hole, and a guide pin guide hole inside, and an intermediate metal plate that has an intermediate inner ring on the inner periphery and has an angular pin storage hole and a guide pin guide hole near the outer periphery. The mold and
It is equipped with a mold in which a movable platen-side cavity is buried approximately in the center, and the movable mold formed by the gate plate, the fixed platen-side holder, the intermediate mold, and the mold is connected to the opposing fixed platen and the movable mold together with the fixed mold. In an apparatus for manufacturing die-cast parts using an aluminum die-casting method, the cam and the cam are mounted between panels using a hinge pin that has a protrusion at the tip and a long groove on the support, which is located near the center of both sides of the fixed mold. A lever shaft arranged at one end of both sides, a pigeon-shaped notch planted on the side of the fixed plate side holder, a notch in the chest, and a guide hole for the lever shaft in the tail, respectively, and the body is attached with a hinge pin and the drawer is drawn out. A lever, a pin that engages with the notch of the pull-out lever installed on both sides of the intermediate mold, a spring stored in a spring storage hole drilled inside the periphery of the mold, and a spring stored in the spring storage hole drilled inside the periphery of the mold, a clamp piece having a protrusion at its tip that engages with the disposed cam; a pull-out plate which also has a pin at its tip and whose other end is fixed perpendicularly to the gate extrusion pin plate and slides on the side of the mold; and a pull-out plate that is movable with the mold. Between the plates, a gate extrusion pin plate is installed in parallel with the movable plate side, which is moved by an extrusion mechanism provided on the movable plate, as a product extrusion plate, and one end of the gate extrusion pin plate on the mold side is pressed against the spring. and a gate extrusion pin implanted approximately in the center of the same mold side, and a bottomed cylindrical shape with the gate extrusion pin disposed inside, one end of which is vertically fixed to the product extrusion plate and passes through the gate extrusion pin plate. After inserting the iron core into the intermediate inner ring, each mold is moved to the fixed mold side, and after the pull-out lever and pin are engaged, the mold is closed. Molten aluminum is poured from the pouring port and the mold is opened after solidification. The gate runner part and the product part are separated at the first mold opening stage by moving the gate plate horizontally with respect to the holder surface on the fixed plate side along the angular pin, and the pin of the drawer plate and the long groove of the cam are separated. In the second mold opening step, the movable mold is released from the fixed mold while the movable mold is engaged, and the gate runner part is pushed out from the gate plate by the gate extrusion pin, and after the mold opening is completed, the extrusion device is moved to release the product. This is a manufacturing device for die-cast parts, characterized in that a die-cast iron core is extruded out of a mold by a product extrusion pin via an extrusion plate. As a result, by installing a new gate runner section and product extrusion mechanism in the movable mold, extrusion of the gate runner section can be performed in conjunction with the molding operation.
In addition, since product extrusion is also performed, product deformation and scratches are eliminated, and product quality and productivity can be improved.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5. It should be noted that the same parts as in the prior art will be designated by the same reference numerals and detailed explanations will be omitted. FIG. 3 is a front view showing a mold open state of a rotor manufacturing apparatus according to an embodiment of the present invention, in which a rod-shaped cam 23 having a triangular protrusion 23a at the tip is located at the center of the side surface of the fixed mold 3. It moves up and down in FIG. 3 using a hinge pin 24 fixed nearby as a fulcrum, and is placed on both sides of the fixed mold 3. Furthermore, in the longitudinal direction of the column of this cam 23,
A long groove 23b is provided to connect with the pin 33 fixed to the drawer plate 39. Next, a lever shaft 34 is screwed to one end of both sides of the fixed mold 3, and a dove-shaped pull-out lever 32 having a notch 32a in the chest is attached.
is attached to the fixed plate side holder 4c. The pull-out lever 32 moves up and down as shown in FIG. Using the outer diameter as a guide, it moves left and right in accordance with the movement of the fixed plate side holder 4c.

The head of the lever shaft 34 passes through a hole penetrating one end of the flat surface of the fixed plate side holder 4c.
Furthermore, the internal structure of the fixed mold 3 and the fixed plate side holder 4c is the same as the conventional one.Next, the movable plate 2 has a through hole in the center through which the extrusion device 36 passes, and a through hole in the center on the right side. A movable mold mounting plate 38 having a flat plate shape is provided. Movable mold mounting blocks 41 are arranged in parallel on both upper and lower sides of the movable mold mounting plate 38 (as shown in FIG. 3).
A movable mold 4a1 having a stepped through hole in the center and a spring storage hole 42 near the outer periphery is disposed on this block 41, and an intermediate mold 4a1 is further disposed on the right side.
b.

Pins 22 for connecting with the pull-out lever 32 are attached near the ends of both sides of the intermediate mold 4b. Next, a short clamp piece 25 having a triangular protrusion at one end of the side surface, a drawer plate 39, and a clamp auxiliary plate 26 are attached to the center of both sides of the movable mold 4a1 in a three-tiered manner. . The protrusion of the clamp piece 25 is so that when the cam 23 operates when the mold is closed or opened (up and down movement in FIG. 3), the connection can be released via the pin 33 at an arbitrary position. The mounting hole is an oval hole so that the removal position can be adjusted. Further, the clamp auxiliary plate 26 holds the drawer plate 32 so that it does not swing up and down as shown in FIG. 3 when the drawer plate 39 slides in connection with the cam 23. Also spring storage hole 4
2. Store the spring 31 in the spring 3.
The guide rod 37 passing through the inner diameter of the movable mold 4a1 is fixed to the movable mold mounting plate 38 and the movable mold 4a1. This spring 31 moves the gate extrusion pin plate 27 and the product extrusion plate 28 to the movable mold mounting plate 3, respectively.
This is a spring to return to the 8th plane. This is because when inserting the iron core 16 into the intermediate inner ring 8, if the product ejecting pin 30 protrudes from the inner end surface of the intermediate inner ring 8, the iron core 16 cannot be inserted.
It is necessary to return the movable mold mounting plate to the 38th surface via the movable mold mounting plate 8.

Next, in the space surrounded by the movable mold mounting plate 38, the block 41, and the movable mold 4a1, there is a gate extrusion pin plate 27 of the flat product extrusion plate 28.
are arranged in order from the left. This product extrusion plate 2
A hole is bored at one end of 8 through which the guide rod 37 passes,
One center part contacts the extrusion device 36, and a product ejection pin 30 having a bottomed cylindrical shape with a part cut out is fixed to the other center part in a horizontal direction perpendicular to the plane of the product ejection plate 28. do. This product extrusion pin 3
A round bar-shaped gate push-out pin 29 is inserted into the inside of the cylinder 0, and this gate push-out pin 29 is fixed to the gate push-out pin plate 27. Further, a pull-out plate 39 is fixed to the gate push-out pin plate 27, and the guide rod 3
A hole through which the number 7 passes is bored. In synchronization with the movement of the extrusion device 36 according to a separate instruction, the product extrusion plate 28 and the gate extrusion pin plate 27 move left and right along the guide rod 37 in FIG.
The internal structure of the intermediate mold 4b is the same as the conventional one.

The operation of the die-cast parts manufacturing apparatus configured as described above will be explained.

The laminated iron core 16 to be die-cast is inserted into the intermediate inner ring 8 with the intermediate mold 4b of the movable mold 4a1 opened. Next, the movable mold 4a
When the gate plate 1 is moved to the right, the gate plate 9 is guided by the angular member 5 and moves downward in FIG. Then, the locking block 3a and gate plate 9 contact the fixed mold 3, and the fixed plate side holder 4c, which has moved at the same time, closes the mold, and as shown in FIG. 4, the movable mold 4a1 and the fixed mold Mold clamping of mold 3 is completed. At this time, the gate push-out pin 29 is inserted into the iron core 16. Next, molten aluminum is injected from the pouring hole 17 in the fixed platen 1, and is forced into the slot of the iron core 16 through the pouring hole 19 by the plunger 18 via the gate plate 9. After forming the secondary conductor of the iron core 16, the short-circuit ring, and the cooling blade 20, the movable mold 4a1 is moved to the left to open the mold, as shown in FIG. At this time, the gate plate 9 is guided by the angular pin 5 and moves upward in FIG. 3, and the cooling vane 20 and the gate plate 9 are sheared and separated. At this time, the movable mold 4a1 and the fixed platen side holder 4c are connected by the pull-out lever 32 as shown in FIG. When the mold is opened, the gate ejector pin 29 is moved to the right via the gate ejector pin plate 27 using the connection mechanism between the long groove 23b of the cam 23 and the pin 33 of the drawer plate 39. At this time, the gate ejecting pin 29 is a hollow product ejecting pin 30.
The gate runner portion 21 adhering to the gate plate 9 is extruded and removed. Note that the fixed plate side holder 4c of the movable mold 4a1 and the gate plate 9 are stopped at a position where they are not completely opened, as shown in FIG.

When the mold is opened further, the lever shaft 3
4, the pull-out lever 32 is removed using the hinge pin 3 as a fulcrum. As the mold opening progresses further, cam 2
3 and the clamp piece 25 are separated by a pin 33, and a spring 31 built in the movable mold 4a1 is released.
As a result, the gate extrusion pin plate 27 returns to the surface of the movable mold mounting plate 38. When the mold opening is completed, the extrusion device 36 built into the die casting machine is moved by the solenoid valve 12 and pressure source 13 according to another command.
Product ejection pin 30 via product ejection plate 28
The iron core 16 is pushed out of the intermediate mold 4b and taken out using a product holder (not shown). Repeat this operation thereafter.

In this way, the gate runner portion can be automatically removed by using the product molded during production of a die-cast part such as a rotor and the mold opening performed immediately after the gate runner portion is sheared and separated. Furthermore, since the product can be extruded in the same die-casting machine, there is no deformation or damage to the product.
Excellent effects such as maintaining product quality at a constant level and improving productivity can be obtained.
Note that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof. For example, runner gate extrusion may be performed using an extrusion device built into a die-casting machine, and product extrusion may be performed using a mold opening.

[Effects of the Invention] As described above, according to the present invention, by providing a movable mold with a new gate runner section and extrusion mechanism, extrusion of the gate runner section is performed in conjunction with the forming operation, and product extrusion is also improved. Since this is done at the same time, there will be no deformation or damage to the product, improving product quality and productivity.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional rotor manufacturing device when the mold is closed, Fig. 2 is a front view showing the mold opening state, and Fig. 3 is a rotor manufacturing device showing an embodiment of the present invention. FIG. 4 is a front view showing the mold closed state, and FIG. 5 is a front view illustrating gate runner extrusion of the present invention. 1...Fixed plate, 2...Movable plate, 3...Fixed mold, 4...Movable mold, 4b...Intermediate mold, 21...
...Gate runner part, 29...Gate extrusion pin,
5... Angular pin, 8... Intermediate inner ring, 9... Gate plate, 16... Iron core, 2
2, 23...Pin, 23...Cam, 23a...Protrusion, 23b...Long groove, 24, 40...Hinge pin, 25...Clamp piece, 27...Gate extrusion pin plate, 28...Product extrusion plate , 30...
...Product ejection pin, 31...Spring, 32...
Pull-out lever, 32a... Notch, 34... Lever shaft, 36... Extrusion device, 39... Pull-out plate.

Claims (1)

[Claims] 1. A fixed mold having a pouring hole inside, an angular pin protruding diagonally from one surface, and a guide pin protruding vertically, and a gate plate having a pouring hole inside and an angular pin guide hole drilled diagonally. , a fixed plate side holder having a product cavity, an angular pin storage hole and a guide pin guide hole inside, and an intermediate mold having an intermediate inner ring on the inner periphery and an angular pin storage hole and a guide pin guide hole near the outer periphery; It is equipped with a mold in which a movable platen-side cavity is buried approximately in the center, and the movable mold formed by the gate plate, the fixed platen-side holder, the intermediate mold, and the mold is connected to the opposing fixed platen and the movable mold together with the fixed mold. In an apparatus for manufacturing die-cast parts using the aluminum die-casting method, the cam and cam are disposed between panels and have a protrusion at the tip and a long groove on the support column, and are mounted near the center of both sides of the fixed mold, and are attached by hinge pins. It has a lever shaft arranged at one end of both sides, a pigeon-shaped notch planted on the side of the fixed plate side holder, a notch in the chest, and a guide hole for the lever shaft in the tail, and the body is attached with a hinge pin. A pull-out lever, a pin that engages with a notch in the pull-out lever that is embedded in both sides of the intermediate mold, a spring stored in a spring storage hole drilled inside the periphery of the mold, and both sides of the mold. a clamp piece having a protrusion at its tip that engages with the cam disposed in the cam; a pull-out plate which also has a pin at its tip and whose other end is fixed perpendicularly to the gate extrusion pin plate and slides on the side surface of the mold; Between the movable plates, a gate extrusion pin plate is installed in parallel with the movable platen side that moves by an extrusion mechanism provided on the movable platen as a product extrusion plate, and one end of the gate extrusion pin plate on the mold side is in contact with the spring. A gate extrusion pin is pressed and implanted approximately in the center of the same mold side, and a cylindrical shape with a bottom is provided with the gate extrusion pin inside, one end is vertically fixed to the product extrusion plate and passes through the gate extrusion pin plate. After inserting the iron core into the intermediate inner ring, each mold is moved to the fixed mold side, the pull-out lever is engaged with the pin, the mold is closed, and the mold is opened after the molten aluminum is injected from the pouring port and solidified. At the first mold opening stage, the gate plate moves horizontally along the angular pin with respect to the holder surface on the fixed platen side, separating the gate runner part and the product part, and the long groove of the pin of the drawer plate and the cam. In the second mold opening step, the movable mold is released from the fixed mold while the movable mold is engaged, and the gate runner part is pushed out from the gate plate by the gate extrusion pin, and after the mold opening is completed, the extrusion device is moved to release the product. A manufacturing device for die-cast parts, characterized in that a die-cast iron core is extruded out of a mold by a product extrusion pin via an extrusion plate.