JPS62207555A - Gate breaker for die casting product - Google Patents

Abstract

PURPOSE:To eliminate the need for costly dies, etc. by a trimming press and to improve productivity by disposing a manipulator to a conveying route for a product and mounting a gate breaking torch to the hand of the manipulator. CONSTITUTION:A product taking-out device 22 is moved to above dies and a chuck 25 is positioned to face the spacing between the dies. The product 27 is ejected and a gate 28 is gripped by opening and closing the chuck 25. The product taking-out device 22 is run along rails and is stopped above a receiving base 30. A torch 34 at the top end of the hand 35 is moved in the prescribed locus by the movement of a robot 32 when a control device 36 and a plasma melt cutting machine 33 are operated. The gate 28 is melt-cut by the plasma jet ejected from the nozzle of the torch 34. The chuck 25 is turned in an arrow A direction to move the product 27 to a chain line position and the gate 28 in another position is melt-cut according to need.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a die-cast product weir cutting device for cutting weirs such as runners, overflows, sprues, etc. attached to products cast by a die-casting machine.

[Conventional technology]

In a die casting machine, the molten metal supplied into the sleeve provided on the fixed mold side is extruded by the plunger of the injection cylinder, and is injected into the cavity through the sleeve, launch, gate, etc., and this molten metal is solidified. The cast product obtained by cooling is opened and extruded from the mold by an extrusion device, and then gripped by a product removal device and transported and discharged outside the machine.

The die-cast product obtained in this way contains excess solidified material, so-called weir, caused by the solidification of the molten metal inside the sleeve, launch, gate, etc.
After accumulation outside the aircraft, these weirs must be cut. Conventionally, the weirs were cut by transporting this cast product to a trimming press, clamping it between the molds, and pressing it. Furthermore, if the weir has a complicated three-dimensional shape, it is difficult to make a mold for a trimming press, so the weir has been cut manually by hitting it with a hammer or the like.

[Problem that the invention seeks to solve]

As described above, in the past, an expensive mold for the trimming press had to be manufactured, which resulted in extremely high costs when the number of castings was small. In addition, since it is difficult to cut the weirs with a trimming press on a hot product immediately after casting, it is necessary to wait for cooling, resulting in poor productivity. For this reason, products are sometimes cooled with water, but there is a problem in that distortion occurs. Furthermore, it takes a lot of time and effort to apply the product released from the take-out device to the trimming press again, and the trimming press is often not usable due to the shape of the weir, so in this case it is necessary to manually apply the product to the trimming press. There was a problem in that the weir had to be cut, which required a great deal of labor.

[Means for solving problems]

In order to solve such problems, in the present invention, a manipulator is disposed in the transport path of the product transported by the product take-out device of the die-casting machine, and a weir cutting torch of a plasma cutting machine is attached to the hand of this manipulator. .

[Effect]

Even with the above configuration, when the product take-out device takes out the product from the mold of the die-casting machine, transports it, and stops mid-way, the hand of the manipulator moves and the torch at the tip of the device moves, Correspondingly, the conveyed products are stacked after the weir is cut while being held by the take-out device.

〔Example〕

1 and 2 show an embodiment of the weir cutting device for die-cast products according to the present invention, FIG. 1 is a plan view of a die-casting machine equipped with this, and FIG. FIG.

In the figure, a die casting machine 1 includes a fixed platen 3 and a cylinder platen 4 supported on a machine base and connected at four corners by tie rods 2.A movable platen 5 is connected to the tie rod 3, and a fixed platen It is supported so that it can move forward and backward in the direction of distance with respect to 3. A fixed mold 6 and a movable mold T are attached to the fixed platen 3 and the movable platen 5, respectively, and both molds 6 and 7 have recesses 6.
& and a convex portion 1a are formed, and by fitting the molds 6 and 7 together, a cavity is formed by the concave portion 6a and the convex portion 7a. The cylinder platen 4 and the movable platen 5 are connected by a trouble mechanism 8 as a telescopic boosting mechanism, and a mold opening/closing cylinder 9 and a mold clamping cylinder 10 are fixed to the tie rod 2 and the cylinder platen 4, respectively. ing. The movable mold 7 is opened and closed with respect to the fixed mold 6 by advancing and retracting the piston rod of the mold opening/closing cylinder 9, and when the piston rod of the mold clamping cylinder 10 is moved forward after the movable mold T is closed. In addition, the movable mold 7 is configured to be clamped by pressure via the trouble mechanism 8. Reference numeral 11 denotes an automatic hot water supply device installed near the fixed platen 3, and when it reciprocates between the melting furnace 12 for storing molten metal and the pouring port 14 on the side of the fixed platen 3 by a driving device 13, The molten metal in the melting furnace 12 is
After the molten metal is pumped out and conveyed in step 5, it is injected into the injection sleeve 15 fitted to the fixed platen 3 from the pouring port 14. On the other hand, an injection cylinder 16 is supported on the fixed platen 3 via a cylinder stand 17.
A plunger tip of a plunger 18 connected to the piston rod by a coupling is fitted into the injection sleeve 15 so as to be able to move forward and backward. When configured as shown in FIG. The liquid is injected into the cavity of the mold 6.7 through a runner 19 and a gate (not shown). Further, an extrusion cylinder 2o is fixed to the cylinder platen 4, and after the molten metal in the cavity has solidified, the mold is opened and the product held on the movable mold 7 side is transferred to the movable mold by the advancement of the piston rod. It is configured to be extruded from a mold T. Reference numeral 21 denotes a spray device that injects mold cleaning air and product mold release agent to the molds 6 and 7 after the product is taken out and before the next mold clamping.
It is configured to move forward and backward between the two.

The die casting machine 1 roughly configured as above includes:
A product take-out device 22 that receives and conveys the product extruded from the mold T is attached. That is, fixed platen 3
From above, a rail 23 extends in a direction perpendicular to the center line of the die-casting machine 1, and a product take-out device 22
is supported by this rail 23 so that it can move forward and backward.

This product take-out device 22 is equipped with a chuck support shaft 24 that hangs down between the two opened molds 6 and 7, and the lower end of this chuck support shaft 24 is driven from the device main body side to open and close. The chuck 25 is rotated by the pivot 26 in the direction of arrow A in FIG.
It is pivoted so that it can rotate freely in the direction. Also, chuck 25
is formed to be able to freely move forward and backward in the mold opening/closing direction with respect to the movable mold T together with the chuck support shaft 24. With this configuration, when the mold is opened after casting the product, the product is pushed out as described above, the chuck 25 opens and closes, advances and retreats, and grips the product, and the entire device is mounted on rails. 23 to convey the product. The product indicated by the reference numeral 2T in the figure is provided with a weir 28 as an excess solidified material formed by solidifying the molten metal inside the gate 19, etc. In this embodiment, the chuck 25 is attached to the product. It is configured to grip this weir 2B without gripping 2T.

In addition, since the structure of the product take-out device 22 is conventionally well known, detailed illustrations and explanations thereof will be omitted.

Furthermore, the product transport path of the product take-out device 22 includes a product 2
A weir cutting device 29 is provided to separate the T and weir 2B. That is, below the protruding end of the rail 23, a frame-shaped pedestal 30 having an inclined sliding surface 30m and extending in a direction perpendicular to the rail 23 is erected on the floor surface. is surrounded by a stage 31 which is also high above the floor level. The weir cutting device 49 includes a robot 32 as a manipulator fixed on the stage 31 in the vicinity of the pedestal 30.
and a plasma fusing machine 33 also installed on the stage 31, and a torch 34 of the plasma fusing machine 33.
is attached to the tip of the hand 35 of the robot 32.

The robot 32 controls the hand 3 by inputting it to the control device 36.
The plasma cutter 33 is a conventional multi-jointed robot that can freely move the tip of the torch 34 in a predetermined direction. This is a conventionally known method. Then, when the chuck 25 grips the weir 2B and transports the product 27 and stops on the pedestal 3G, the torch 34 moves in a predetermined trajectory while ejecting a plasma jet from the nozzle.
The weir 28 is melted and the product 27 is placed on the sliding surface 30a of the pedestal 30.
It is configured to emit upwards. In addition, chuck 2
5 is rotationally driven in the direction indicated by the arrow, so depending on the position and shape of the weir 28, the weir 28 can be melted by being rotated as shown by chain lines 27 and 28 in FIG. Further, the pedestal 30 is provided with a guide plate 38 that is rotated by a motor 37, and near the pedestal 30, as shown in FIG. It is provided. Due to this configuration, the guide plate 3
When the product 27 is released after rotating the sliding surface 30 m obliquely by rotating the sliding surface 30 m, the guide plate 38
The products are guided by the product receiving box 39 and are collected therein. Further, when the guide plate 38 is opened and the chuck 25 is opened to release the weir 28, this weir 28 is released from the sliding surface 30&
It slides straight down and falls into the weir receiving box 40 and is accumulated.

The operation of the die casting machine and weir cutting device configured as above will be explained. In the open state of the molds as shown in the figure, a mold release agent is applied to the molds 6 and 7 by the spray device 21, and the spray device 21 is removed to perform mold clamping. After the molten metal in the melting furnace 12 is pumped out by the automatic water heater 11 and the sheath 15 and supplied into the injection sleeve 15 from the pouring port 14, when the pusher 18 of the injection cylinder 16 is moved forward, the molten metal in the injection sleeve 15 is pumped out. It is pushed and injected into the cavities of the molds 6 and 7. When the mold is opened after the injected molten metal has solidified, the solidified product 27 is held on the movable mold T side with the weir 28 attached.

Therefore, the product ejecting device 22 is moved above the molds 6 and 7, and the chuck 25 is placed between the molds 6 and 7 to wait. Then, the product 2T is extruded by the extrusion cylinder 20, and the chuck 25 is opened and closed. The handle 28 is held. and,
When the product take-out device 22 is run on the rail 23 and stopped above the pedestal 30, and the control device 36 and plasma cutter 33 are activated, the movement of the robot 32 causes the tip of the gino-nod 35 to be cut. The torch 34 moves along a predetermined trajectory, and the plasma jet ejected from the nozzle of the torch 34 melts down the weir 28 . If necessary, the chuck 25 is rotated in the direction of arrow A to move the product 27 to the chain line position, and the weir 28 at a different position is melted.

At this time, if the guide plate 38 is rotated by the motor 3T to obliquely block the sliding surface 30m, the product 27 released by the melting of the weir 28 will be guided after sliding on the sliding surface 301L. It is guided by the plate 38 and falls into the product receiving box 39.
Accumulated. After this, when the guide plate 38 is opened and the chuck 25 is opened to release the weir 28, this weir 28
The debris slides straight on the sliding surface 30a, falls into the weir receiving box 40, and is accumulated.

In this embodiment, an example is shown in which the weir cutting device 29 is provided in the product path of the linear traveling type product take-out device 22, but the weir cutting device 29 is a rotary arm with a chuck attached to the tip of the rotary arm. It can be provided in the product path of various product take-out devices, such as type ones. Further, the manipulator to which the torch of the plasma cutting machine is attached is not limited to that shown in the drawings. Furthermore, in this embodiment, the chuck 25
Although an example of gripping the pipe 28 has been shown, the product 2T may also be gripped.

[Effects of the Invention] As is clear from the above explanation, according to the present invention, the weir cutting of the plasma welding machine is performed on the hand of the manipulator disposed in the conveyance path of the product conveyed by the product take-out device of the die-casting machine. The structure is configured to plasma-cut the weir from the IT product gripped by the chuck of the product take-out device by attaching a torch to the product. In addition to significantly reducing the cost of cutting, there is no need to wait for cooling and there is no need for transportation for cutting, so it is possible to improve productivity and reduce labor. Furthermore, by using a manipulator and a plasma cutting machine, it is possible to cut a complicated three-dimensional weir, and manual cutting of the weir becomes unnecessary, which reduces labor.

[Brief explanation of drawings]

1 and 2 show an embodiment of the weir cutting device for die-cast products according to the present invention, FIG. 1 is a plan view of a die-casting machine equipped with this, and FIG. FIG. 1.C.Die casting machine, 611--.Fixed mold,
7...Movable mold, 22...Product removal device, 23
...Rail, 25φ...Chuck, 27...
Product, 28...φ・Weir, 29...Weir cutting device,
30... cradle, 32... robot, 33...
・Plasma fusing machine, 34...Torch, 35...
Hand, 36...control device.

Claims (1)

[Claims] Weir cutting of a die-cast product, characterized in that a manipulator is disposed in the transport path of the product transported by a product take-out device attached to a die-casting machine, and a weir-cutting torch of a plasma welding machine is attached to the hand of the manipulator. Device.