JPH0442030Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a core placing device that automatically places a core into a mold.

(Prior art) As a device that automatically places the core into the mold,
For example, there is a technique disclosed in Japanese Patent Application Laid-Open No. 55-36028.

As shown in FIG. 4, this automatic core storing device 1 consists of a traversing cart 3 which is moved by a cylinder 2, a main body table 5 which is moved up and down by a cylinder 4 attached to the traversing cart 3, and a main body table 5. The hanging tool 6 is moved up and down and horizontally between the mold 7 and the core setting jig 8, and the core 9 set in the core setting jig 8 (as shown in FIG. ) is held in a predetermined position by a hanging tool.
It can be stored inside.

And, as shown in FIG. 5, the hanging tool 6 is
Clamp claws 1 are provided on the left and right sides of the main body table 5, respectively.
The cylinders 12 and 13 to which the cylinders 0 and 11 are attached are provided.
As a result of this operation, the clamp claws 10 and 11 are guided by the fixed rods 14 and 15 and move to clamp the core 9 from both ends.

The cylinder 16, positioning plate 17, etc. shown in the figure are for stopping one clamp claw 10 at a predetermined position in order to clamp a core of a desired shape.

By the way, since the mold making process and the core manufacturing process are generally separate, the mold and core are transported by a conveyance device to the core placement process where the core placement device is installed. etc., and are automatically transported and stored there.

(Problems to be solved by the invention) However, when setting the mold in the core holding device, it is not easy to set the mold accurately in the reference position due to variations in the positioning accuracy of the conveying device, etc. The set position often shifts.

Therefore, if the amount of misalignment is large, the core may not fit into the mold, causing damage to the mold, or even if the core is stored, the dimensional accuracy of the cast product may be poor, resulting in a defective product. .

The present invention was devised in view of the above problems, and its purpose is to improve the accuracy of placing a core into a mold in an automatic core placing device.

(Means for solving the problems) Means for solving the above problems will be explained based on FIGS. 1 to 3.

An inner frame 31 is attached to an outer frame 29 movable from the standby position Q of the core 21 to the mold body 19 so as to be movable in the left and right direction.
1 is provided with claw members 34 and 35 that hold the core 21 therebetween. Further, a position detection device 22 is provided to detect the position of the mold body 19 in a non-contact manner, and a comparison calculation is made between the position of the mold body 19 detected by the position detection device 22 and a preset reference position of the mold body. A calculator (not shown) is provided, and it is composed of a servo motor 38 and a ball screw 39 for moving the inner frame 31 relative to the outer frame 29 based on the value calculated by the calculator. It is equipped with a moving mechanism.

(Function) According to this configuration, the actual position of the mold body 19 that has been transported and set at a predetermined position is measured by the position detection device 22, and the measured value and the preset reference position are measured by a computer. A comparison calculation is performed to calculate the amount of deviation. Then, the servo motor 38 is operated based on the calculated value, and the ball screw 39 is
by rotating the inner frame 31 holding the core 21 with the claw members 34 and 35 to the outer frame 29.
move relative to. As a result, the position of the core 21 is corrected to match the housing position of the mold body 19.

(Example) Next, an example of the present invention will be described based on the drawings. Note that the core holding device of this embodiment will be described as being used in a vertical continuous molding device.

As shown in the cross-sectional view of FIG. 3, the vertical continuous molding device 18 forms half molds 20 for molding one side of a cast product on both the front and rear surfaces of a mold body 19, and inserts a core 21 into the half molds 20. After the core is placed in the core holding device, the mold bodies 19 are brought together in the front and back direction, thereby allowing continuous molding.

Next, a core holding device provided in such a vertical continuous molding device 18 will be explained.

The core holding device includes a position detection device 22 that detects the position of the mold body 19 in which the core 21 is to be placed.
and a core transfer device 23 that holds the core 21 and moves it from the core standby position Q to the mold body 19, corrects the holding position of the core 21, and stores it in an accurate position within the half mold 20. , the position detection device 22
It is comprised of a computer (not shown) that compares and calculates the position of the mold body 19 detected by the reference position with the reference position.

Here, the position detection device 22 may be any device that can detect the position without contact, for example,
A CCD (Charge Coupled Device) camera, photoelectric switch, etc. are used.

First, as shown in FIG.
is attached to the frame (not shown) of the vertical continuous molding device 18 facing the open surface of the mold body 19, and detects the position P of the end of the half mold 20 of the mold body 19. .

Next, as shown in FIGS. 1 and 2, the core transfer device 23 moves the pair of guide rods 24 in a direction perpendicular to the molding direction (X in FIG. 3).
-X direction), and is fixed to a support member 25 hanging down from above.

A guide bush 26 is movably slidably connected to the guide rod 24, and a piston rod 27a of a cylinder device 27 is fixed to the upper part of the guide bush 26. Then, the piston rod 27a expands and contracts due to the operation of the cylinder device 27, thereby moving the guide bush 26 along the guide rod 24.

The guide bush 26 has a pair of guide rods 28 whose longitudinal direction is the molding direction (Y-Y direction in FIG. 3).
It is fixed towards the guide rod 2.
8 is a guide bushing part 29 of the outer frame 29.
a is movably slidably contacted. Further, a piston rod 30 of a cylinder device 30 fixed to the guide bush 26 is attached to the outer frame 29.
a is connected, and the outer frame 29 is connected to the guide rod 28 by the expansion and contraction of the piston rod 30a.
is moved along. An inner frame 31 is attached to the outer frame 29 via rails 32 so as to be movable in the left-right direction (XX direction in FIG. 3).

A lower receiving part 33 for holding the core 21 and claw members 34 and 35 provided opposite to each other are attached to the inner frame 31. In this embodiment, the lower receiving part 3 is used as the reference position of the core 21.
3 and the other claw member 35 are fixed, but may also be movable.

One of the claw members 34 is mounted so that it can be moved by expanding and contracting the piston rod 36a by the operation of the cylinder device 36. By moving the one claw member 34, it is possible to hold the core 21 by sandwiching it with the other claw member 35. Further, the amount of movement of one claw member 34 is measured by a sensor 37.

Next, the inner frame 31 is replaced with the outer frame 29.
A moving mechanism for moving in the left and right direction relative to the camera will be explained.

The outer frame 29 and the inner frame 31 have a servo motor 3 attached to the inner frame 31.
8 and a ball screw 39 connected to the servo motor 38
It is attached to the outer frame 29 and connected by a nut 40 that screws into a ball screw 39. When the servo motor 38 is operated, the ball screw 39 rotates to move the inner frame 31 relative to the outer frame 29. It can be moved relatively along the rail 32.

Further, a computer (not shown) is connected to the position detecting device 22, which compares and calculates the detected position with a reference position, and further, the computer controls the servo motor 38 based on the calculated value. connected to control.

The operation related to the above configuration will be explained.

The core 21 is transported to a predetermined standby position Q by a transport pallet (not shown). And middle child 2
1 is transported to the standby position Q, the cylinder device 30 of the core transfer device 23 is activated, and the piston rod 30a is extended, so that the outer frame 29
moves in the A direction, and holds the core 21 by sandwiching it between the lower receiving portion 33 and claw members 34 and 35 provided on the inner frame 31.

After the inner frame 31 holds the core 21, the piston rod 30a of the cylinder device 30 is shortened and the outer frame 29 moves in the B direction. Subsequently, the piston rod 27a of the cylinder device 27 is extended, and the outer frame 29 moves in the C direction to be located in front of the mold body 19. During this move,
The position detection device 22 measures the position of the end P of the mold body 19, and a computer compares the measured value with a preset reference position of the mold body 19,
The amount of deviation of the mold body 19 from the reference position is calculated.

Then, the servo motor 38 is operated to rotate the ball screw 39 based on the calculated amount, and the inner frame 31 is moved relative to the outer frame 29, thereby correcting the position of the core 21.

Once the position of the core 21 has been corrected, the piston rod 30a of the cylinder device 30 is extended again to move the outer frame 29 closer to the mold body 19 (moved in the D direction), and the core 21 is moved into the half mold 20 accurately. Move it to a suitable storage position. Subsequently, the claw members 34, 3
5 is released from holding the core 21, and the core 21 is housed in the half mold 20.

When the core 21 is placed in the half mold 20 of the mold body 19, the cylinder devices 27 and 30 are operated to move the outer frame 29 and the inner frame 31 in the E direction and the F direction. , return to the initial position and repeat the work of inserting the next core 21 again.

In this way, the core 21 can be placed in an accurate position within the mold body 19, and by repeating this process, molds can be molded continuously and cast products with high dimensional accuracy can be molded. becomes.

In this embodiment, a configuration of a servo motor 38 and a ball screw 39 is used as a means for moving the inner frame 31 relative to the outer frame 29, but the configuration of the servo motor, rack, and pinion is different. You may also use

(Effects of the invention) As explained in detail above, the present invention uses a position detection device and a computer to compare and calculate the amount of deviation even if the set position of the mold is misaligned, and based on that amount, the core is placed in the mold. Because I tried to match the position,
The core can be placed accurately.

Therefore, the dimensional accuracy of the cast molded product is improved and the quality is improved, and post-processing etc. are reduced, so that productivity can also be improved.

Furthermore, since the amount of deviation in the set position of the mold is measured, the timing of inspection and repair of the conveyance device can be set based on the increase in the amount of deviation, and maintenance and inspection of the equipment can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a core transfer device of an automatic core storage device installed in a vertical continuous molding apparatus according to an embodiment of the present invention, and FIG. 2 is a front view of a core transfer device shown in FIG. The right side view, FIG. 3 is a schematic cross-sectional view of a vertical continuous molding device equipped with the automatic core storing device of the present invention, and FIG. 4 is an overall front view of the conventional automatic core storing device. FIG. 5 is a longitudinal sectional view showing details of the core hanger shown in FIG. 4. 19... Mold body, 21... Core, 22... Position detection device, 29... Outer frame, 31... Inner frame, 34, 35... Claw member, 38... Servo motor (moving mechanism) , 39...Ball screw (moving mechanism).

Claims (1)

[Scope of utility model registration request] An inner frame is attached so as to be movable in the left and right direction to an outer frame which is movable from a standby position of the core to the mold body, and the inner frame is provided with claw members for holding the core, and the position of the mold body is controlled. A position detection device for non-contact detection is provided, a calculator is provided to compare and calculate the position of the mold body detected by the position detection device and a preset reference position of the mold body, and the value calculated by the computer is An automatic core storing device characterized in that a moving mechanism is provided for moving the inner frame relative to the outer frame based on the structure.