JP2562975Y2 - Casting reversing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cast product reversing device for reversing a cast product cast by a die casting machine or the like up and down between processes.

[0002]

2. Description of the Related Art Generally, for example, when an engine block or the like is cast by a die-casting machine or the like, a casting that protrudes from a joint surface between an upper mold and a lower mold, and a solidified material in a runner or a gate that is a passage of molten metal. Since a surplus material such as is taken out of the casting, it is provided with a trimming press for removing the surplus material. On the other hand, in the case of a casting using a disintegratable sand core, the mandrel for holding the sand core in the mold cavity is embedded in the casting, so it is necessary to remove this after casting. Yes, this step of mandrel removal is generally incorporated next to the trimming step described above. However, when the casting is trimmed and when the mandrel is removed from the casting, the casting is set in the opposite direction. Therefore, it is necessary to grip the casting and turn it upside down during this time.

[0003]

In this case, it is conceivable that the robot is turned upside down. However, the structure of the robot is complicated and the production cost is increased. In addition, when the cast product is, for example, an engine block, its weight is 40 kg. However, there is a problem that a large-sized robot is required, cannot be provided at low cost, and the installation space is increased. Furthermore, in the case of a robot, the structure of the chuck portion becomes more complicated because it is reversed with the wrist,
There is a problem that practical application is not easy.

The present invention has been made in view of the above points, and has as its object to provide a cast product reversing device that enables a cast product to be reliably reversed with a simple structure.

[0005]

In order to achieve such an object, the present invention is directed to a trimming press and a mandrel removal press having an upper die and a lower die from both sides of a casting taken out of a casting apparatus. A pair of left and right guide rails, a pair of guide frames that are supported by the respective guide rails so as to face each other and are driven forward and backward in the direction in which the guide rails extend by the driving device, and supported by the respective guide frames. A pair of bearings driven up and down by a driving device, a chuck mounted on each of these bearings via an advance / retreat drive device, and driven by the advance / retreat drive device to move in opposite directions to clamp the casting by advancing, and the advance / retreat drive A reversing drive device directly connected to the device and reversingly driving the chuck via the reciprocating drive device.

[0006]

[Function] The chuck positioned above the casting removed from the casting apparatus is lowered to pinch the casting, the chuck is raised and advanced, and then the chuck is lowered and opened to reach the outside position. A casting is placed on a trimming lower mold. Waiting for the trimming operation to end by raising the chuck, holding the casting on the trimming lower die that has come out of the machine after the trimming operation by lowering and opening and closing the chuck, ascending and lowering the chuck by reversing the chuck. By opening and closing, the cast product is placed on the lower mold without the mandrel in an inverted state. One cycle is completed by raising and lowering the chuck during the mandrel removal operation.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment shows an example in which the present invention is applied to an automatic casting apparatus for an engine block. FIG. 1 is a plan view of a reversing apparatus for a casting, FIG. 2 is a front view thereof, and FIG. FIG. 4 is an enlarged side view as viewed in IV direction of FIG. 1, FIG. 5 is a schematic plan view of the entire automatic casting apparatus, and FIG. 6 is a longitudinal sectional view of a mold for an engine block as a casting. In FIG. 5, reference numeral 1 denotes a vertical die-clamping die-casting machine, which is a die 2 which is clamped and opened by a clamp cylinder (not shown), and a core toward a cavity thereof. The die casting machine 1 is provided with a product unloading device 5 having a function of a core loader for supplying the sand core 4 into the mold cavity. The engine block as a casting is taken out from the opened mold 2 to the outside of the machine.

Here, the casting will be described with reference to FIG. The castings are the upper die 6 and lower die 7 of the die casting machine 1.
And is formed by solidification of the molten metal injected into the cavity 9 surrounded by the slide core 8, and a cylindrical sleeve 1 is provided at the center of the cavity 9.
0 is fitted to the flanged cylindrical mandrel 11. The sand core 4, which is formed in a cylindrical shape and has disintegration properties,
It is located outside the sleeve 10 and is held by the flange of the mandrel 11. When the molten metal is injected into the cavity 9 and solidified, the mold is opened. When the sand core 4 is collapsed and taken out from the lower mold 7, a part of the solidified casting becomes a cooling jacket. Is formed.

In FIG. 5, reference numeral 20 designates a trimming press having a mandrel removing function. The trimming press is driven by a movable cylinder 21 and integrally moves in a direction indicated by an arrow A in FIG. 22 and a lower mandrel removing die 23, and a mandrel removing upper die 25 driven by another moving cylinder 24 to advance and retreat in a direction indicated by an arrow B in the figure, and a trimming upper die 26 moving up and down in the machine. It has.

With this configuration, when performing the trimming operation and the mandrel removal operation,
A cast product indicated by reference numeral 27 in FIGS. 1 and 2 is placed on the trimming lower mold 22 at the outside position of the machine, moved to the inside of the machine, and the upper trimming mold 26 is lowered to remove excess material. After the work, both lower dies 22, 23
To the outboard position. Next, the casting 27 is turned upside down by 180 ° and placed on the lower mandrel pulling die 23, moved into the machine, and then lowered by moving the upper mandrel pulling die 25 into the machine. Mandrel removal work is performed.

As described above, in the trimming operation and the mandrel removing operation, the mounting direction of the casting 27 on the lower dies 22 and 23 is upside down due to the nature of the operation. Must be turned upside down, the present apparatus is provided with a reversing device. The reversing device will be described below. A pair of upper and lower horizontal guide rails 28 each having a convex cross-section are extended from both sides of the die casting machine 1 to the trimming press 20 on both sides of the casting 27 taken out from the die casting machine 1. The guide rails 28 are slidably fitted with guides 30 provided at four corners of a guide frame 29 which is formed in a character shape when viewed from the front. 31 is a left and right connecting plate for connecting the upper and lower guide rails 28,
A piston rod 3 is provided at the center of each connecting plate 31 in the height direction.
The telescopic traveling cylinders 34 having their working ends fixed to the U-shaped member 33 on the side of the guide frame 29 are respectively mounted, and the left and right piston rods 32 are moved forward and backward by synchronizing. Is configured to advance and retreat along the guide rail 28.

On the other hand, a case 35 formed in a rectangular frame shape
A reversing rotary actuator 36 is mounted on one end of the case 35 via a bearing 37, and a bearing 38 is mounted on the other end of the case 35. And each of these bearings 3
The guides 39 are formed integrally with 7 and 38.
Elevating cylinders 40, 41 are respectively provided upright near the bearings 37, 38, and their piston rods 42 are fixed to the bearings 37, 38, respectively.
The case 35 is configured such that the case 35 is restricted in rotation through the bearings 37 and 38 and moves up and down while being guided by the guide members 43 on both sides by moving the case 2 back and forth in synchronization.

In the case 35, reference numeral 4
4, a pair of chucks are provided adjacent to the bearings 37 and 38.
A chuck cylinder 45 rotatably supported by the shafts 7 and 38 and restricted from moving in the axial direction; fixed to the working end of a piston rod 46 of the chuck cylinder 45 and guided by a guide 47 together with the piston rod 46; And a chuck attachment 48 that advances and retreats in the axial direction. Reference numeral 49 denotes a projection that projects from the plane of the chuck attachment 48 and is inserted into a concave hole of the casting.

In FIG. 5, reference numeral 50 denotes a mandrel recovery device for recovering the mandrel 11 removed from the casting 27, and reference numeral 51 denotes a mandrel for removing the burrs and the like from the recovered mandrel 11 and cleaning the inner and outer peripheries. It is a cleaning device. Further, reference numeral 52 denotes a mandrel 1 on the sleeve 10 fitted on the sand core 4 on the set table 53.
1 is a mandrel press-fitting device.

The operation of the casting product reversing device configured as described above will be described. The cast product 27 cast by the die casting machine 1 is taken out by the product take-out device 5 and held on the table. At this time, the piston rod 32 of the traveling cylinder 34 moves forward, and the reversing device stops immediately above the casting 27, and the piston rod 42 of the lift cylinders 40 and 41.
Is retracted, the piston rod 46 of the chuck cylinder 45 advances, so that the chuck attachment 48
Is advanced, the projection 49 is inserted into the concave hole of the casting 27, and the casting 27 is gripped by the chuck 44.

Next, after the casting 27 held by the chucks 44 is lifted by the lifting / lowering syringes 40 and 41, the casting 27 is conveyed by the traveling cylinder 34 and stopped on the trimming lower die stopped at the outside position. And lifting cylinder 4
After the chuck 44 is lowered by 0 and 41, the casting 27 released by the chuck 44 by the chuck cylinder 45 is placed on the lower trimming die.

Thereafter, the chuck 44 is raised by the lifting cylinders 40 and 41, and the lower trimming die is moved into the machine, and the trimming operation by the trimming press and mandrel removing press 20 is performed. During the trimming operation, the chuck 44 is standing by at the raised position, and after the trimming operation, the lower trimming die on which the trimmed casting is placed and the lower mandrel removal die move outside the machine and stop.

Then, the chuck 44 is lowered by the lifting cylinders 40 and 41, and the casting 27 is gripped by the chuck 44 by the chuck cylinder 45.
The chuck 44 is raised by 0 and 41. Since the reversing rotary actuator 36 operates with the rise, the chuck 44 rotates 180 °, so that the casting 27 is turned upside down. After the reversal, the chuck 44 is moved upward by the traveling cylinder 34 to move the chuck 44 upward, and then lowered by the lifting cylinders 40 and 41 to release the gripping of the casting 27 by the chuck cylinder 45. It is placed on the lower die.

While the mandrel is being removed, the chuck 44 is raised by the lifting cylinders 40 and 41, and is returned to the casting removal position by the traveling cylinder 34, thus completing one cycle. The mandrel 11 removed from the casting 27 is collected by the mandrel collecting device 50.

[0020]

As is apparent from the above description, according to the present invention, in a casting product reversing device, a trimming press having an upper die and a lower die from both sides of a cast product taken out of the casting device is used. A pair of left and right guide rails extending toward the mandrel removal press, a pair of guide frames supported by the respective guide rails so as to be opposed to each other, and driven forward and backward in the direction in which the guide rails extend by a driving device; A pair of bearings supported by a guide frame and driven up and down by a driving device, and a chuck mounted on each of these bearings via an advancing / retracting drive device and driven forward / backward in opposite directions by the advancing / retracting drive device to clamp the casting by advancing. And a reversing drive device that is directly connected to the reversing drive device and reversibly drives the chuck via the retreat driving device. That structure as compared with the case is simple and compact, the space occupied is reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a casting product reversing device.

FIG. 2 is a front view of a casting product reversing device.

FIG. 3 is a side view as viewed in III of FIG. 1;

FIG. 4 is an enlarged side view as viewed from IV in FIG. 1;

FIG. 5 is a schematic plan view of the entire automatic casting apparatus.

FIG. 6 is a longitudinal sectional view of a mold for an engine block as a casting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Die-casting machine 4 Sand core 11 Mandrel 20 Trimming press and mandrel removal press 27 Casting product 28 Guide rail 29 Guide frame 34 Traveling cylinder 36 Rotary actuator for reversing 37 Bearing 38 Bearing 40 Lifting cylinder 41 Lifting cylinder 44 Chuck 45 Chuck cylinder 48 Chuck attachment

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of left and right guide rails extending from both sides of a cast product taken out of a casting apparatus to a trimming press and a mandrel removal press provided with an upper die and a lower die. A pair of guide frames supported opposite to each other and driven forward and backward by the driving device in the direction in which the guide rail extends, a pair of bearings supported by these guide frames and driven up and down by the driving device, A chuck which is mounted via a driving device and which is driven forward and backward by the forward / backward driving device in the opposite direction and grips the casting by advancing; and which is directly connected to the forward / backward driving device and reversely drives the chuck via the forward / backward driving device. A casting product reversing device comprising a reversing drive device.