JPS61199550A - Core presetter - Google Patents

Abstract

PURPOSE:To permit the easy automation of the setting operation of a core by pressing the core in a core housing jig by a pressurized gas to stabilize the attitude thereof in the stage of presetting. CONSTITUTION:A pressurizing head 21 and the core housing jig 3 are brought near to each other by moving either thereof and thereafter the head and jig are brought into tight contact with each other by gripping means 25. The pressurizing gas is then supplied into a space 22 between the head 21 and the jig 3 by a pressure gas supplying means. The core 2 is seated and held in the core housing jig by such gaseous pressure. The head 21 is rotated at a prescribed angle in this state. The core is held seated in the core housing jig by the gas in this stage and is therefore free from a positional deviation. A core housing device 27 contacts tightly with the jig 3 from the rear of the jig 3 in this state and holds at the same time the jig 3. The device 27 sucks and supports the core. The supply of the pressurized gas from the head 21 is finally stopped and after the gripping 25 of the jig 3 is released, the jig is rotated at the prescribed angle to restore the original attitude. The presetting is thus completed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a core presetting method for supplying cores and core storing jigs to a vacuum suction type core storing device used in a vertical molding machine. Regarding equipment.

[Conventional technology]

Traditionally, cores are used to create cavities or holes in cast products. A core holding device is used to set the core in the mold. Recently, a core-storing jig that matches the work-in-progress product being molded is installed in this core-storing device, and the core is set in this core-storing jig.

□As a method for setting the core, either of the following methods has been adopted: (1m) manual method, or (a) method in which the core is automatically set using a core feeder.

[Problem that the invention seeks to solve]

By the way, in the case of method (5), there is a problem that when the number of cores inserted at one time is large, the working time becomes long, and as a result, the cycle time is extended.

Further, in the case of method (b), when changing the work in progress, it is necessary to change the middle child feeding device.

For this reason, there is a problem in that it is extremely difficult to deal with many types of devices.

Furthermore, both method (a) and method (b) require replacement of the core holding jig at the time of stage change, and at this time there is a problem that temporary stoppage of the molding machine is unavoidable.

For this reason, it has been desired to develop a core presetting device that can automatically supply cores to various types of work-in-progress products without stopping the molding machine during stage changes.

[Means for solving problems]

The above problem is solved by the core briscent device of the present invention, which will be described below.

That is, the core presetting device of the present invention is a core presetting device that supplies a core and a core storing jig to a vacuum suction type core storing device used in a vertical molding machine, and includes: A pressure head that can be brought into close contact with the core holding jig containing the core and has a space for pressurizing the core, and a grip that holds the pressure head and the core holding jig in a state in which they are in close contact with each other. The pressurizing head is characterized by having a pressurizing gas supply means for supplying pressurized gas into the pressurizing head, and a rotation driving means for rotating the pressurizing head to the vicinity of the core accommodating device.

[Effect]

According to the core presetting device of the present invention, first, either the pressure head or the core storage jig is moved to approach each other, and then both are tightly fixed by the gripping means. 'll1t,
The pressurized gas supply means supplies pressurized gas to the space formed by the pressurizing head and the core housing jig. This pressurized gas firmly holds the core within the core holding jig. In this pressurized state, the pressurizing head is rotated by a predetermined angle, for example, 90 degrees. At this time, since the core is pressed by the pressurized gas, its position will not shift. In this state, the core storage device comes into close contact with the core storage jig from the back of the core storage jig, and at the same time holds the core storage jig.Then, from the back of the core storage jig to the core storage position. The core is suctioned through the suction holes provided in communication with each other, and the core is suction-supported by the core holding device. Finally, after stopping the supply of pressurized gas from the pressurizing head and releasing the grip on the core holding jig, it rotates by a predetermined angle and returns to its original position. This completes the presetting of the core.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Here, FIG. 1 is a sectional view taken along the line 1-1 in FIG. 3, FIG. 2 is an enlarged view of part A in FIG. 1, and FIG. 3 is a conveying device including a core presetting device according to an embodiment of the present invention. , a plan view showing the entire core storage device and empty jig removal device, and FIG. 4 is the same as I in FIG. 3.
5 is a cross-sectional view taken along the line V-mV in FIG. 3. FIG.

FIG. 3 shows an automatic core feeding device consisting of a core conveyance device, a core presetting device, a core storage device, and an empty jig removal device. First, an overview will be provided. The core storing jig containing the core is carried to a predetermined position by a core conveying device. Therefore, the core holding jig is held in close contact with the core presetting device, rotated 90 degrees with the core posture maintained by pressurized gas, and delivered to the vacuum suction type core holding device. The core accommodating device, which holds the core accommodating jig and suction-supports the internal core, performs a predetermined operation to accommodate the core in the mold, and then returns to its original position. Thereafter, the core storage jig (hereinafter referred to as an empty jig) from which the core has been removed is taken out by an empty jig take-out device and returned to a predetermined position.One cycle is completed by this series of operations.

Next, this automatic core feeding device will be explained in detail.

In FIGS. 3 and 5, reference numeral 1 denotes a first roller conveyor that carries in a core storage jig 3 with a core 2 set therein from outside the apparatus. 1
A second roller conveyor 4 extending in the same direction as the roller conveyor 1 for returning empty jigs is provided at a predetermined height from the floor 5. A first table with rollers 6 is provided at the input end of the first roller conveyor 1.
The lifting device 7 allows the core storage jig 3 placed on the same surface as the first roller conveyor 1 and on the traversing roller conveyor 8 to be raised and lowered to a level where it can be moved laterally. On one side perpendicular to this first table with rollers 6 (lower side in FIG. 3), a core storage jig 3 mounted on a cross-feeding roller conveyor 8 is placed with the first roller conveyor 1 in between. An extrusion device 10 is provided which is inserted into a core presetting device 9 provided on the opposite side. This extrusion device 10 consists of an extrusion rod 11 having a shape that joins the side surface of the core storage jig 3, and a linear actuator 12 that drives the extrusion rod 11.

The core presetting device 9 is housed in a rectangular frame 13 having a roof-like top. As shown in FIG. 4, a second roller-equipped table 14 is provided below within the frame 13, guided by a guide member 15, and movable up and down by a linear actuator 16. At this time,
The lowering end of the second table with rollers 14 is at the same level as the traverse roller conveyor 8. A shaft 17 is horizontally suspended in the upper part of the frame 13, which corresponds to the ridge of the roof.
It is rotatably supported by bearings 18 at both ends. This bearing 18 is connected to the rotary actuator 2 via a shaft joint 19.
Connected to 0. A pressure head 21 is attached to this shaft 17.
is hanging. As shown in FIG. 2, this pressure head 21 is in close contact with the outer periphery of the core holding jig 3, and
This pressurizing head 21, which has a pressurizing space 22 inside and has a so-called box shape with one end open, is partially open and has a piping joint 23 attached thereto.

This piping joint 23 is connected to a pressurized gas supply source (not shown) via a flexible hose 24. Further, a gripping means 25 for fixing the core holding jig 3 is attached to the side surface of the pressurizing rod 21. In addition, on the back side of the core storage jig 3 where the core 2 is stored, there is a suction hole 2 that communicates with the outside.
6 is provided.

In this core briscent device 9, a core holding device 27 is provided near the position where the pressure head 21 is rotated 90 degrees. As shown in FIG. 4, this core accommodating device 27 is guided by a guide rod 51 and moves between a core preset position and a core accommodating position C in a vertical mold. Note that this core holding device 27 is of a vacuum suction type, and its configuration is the same as that of a conventional device, so a detailed explanation will be omitted.

An empty jig removal device for placing the core 2 in a mold and taking out the empty jig (core storing jig) 3 is shown in FIGS. 4 and 3. In FIG. 4, 28 is a U-shaped frame,
It has an opening that can hold the empty jig 3 in a vertical position. A pair of claws 29 for holding the empty jig 3 are provided inside the tip of the U-shaped frame 28. This claw 29 is guided by a guide member 30 and is movable forward and backward by a linear actuator 31. This U-shaped frame 28 is connected to a shaft 32, which is rotatably supported by a bearing 33 and rotatable by a rotary actuator 34. The bearing 33 is integrated with the frame 35, and is enabled to move in small strokes by means of two guide rods 36 and a linear actuator (not shown). The two guide rods 36 are supported and fixed to a frame 37. This frame 37 enables horizontal movement of the U-shaped frame 28 to the empty jig 3 by means of two guide rods 38 and a linear actuator 39.

Note that the guide rod 38 is fixed by a seat 40.41.

Next to the exit position of the U-shaped frame 28, a table 42 is provided as a jig holder on which the empty jig 3 is placed.

As shown in FIGS. 4 and 5, the table 42 of this jig receiver has four parallel links 46 attached to a bearing frame 43 and connected at one end to a drive shaft 45 driven by a rotary actuator 44. is connected to the tip of the link pin 47 via a link pin 47.

Furthermore, on the end side of the second roller conveyor 4, an empty jig 3 is provided.
An empty jig extrusion device 48 is provided for transporting the jig out of the apparatus. This empty jig extrusion device 4B consists of an extrusion head 49 and a linear actuator 50.

Next, the operation will be explained.

In addition, for convenience of explanation, the positions of the core storage jigs (empty jigs) 3 are shown with reference signs a1 to a for each movement order of the core storage jigs 3.

The core 2 to be placed in the mold is set in a core holding jig 3 outside the apparatus. At this time, in order to stabilize the core 2, the core storing jig 3 is tilted by 90 degrees from the posture at the time of storing the core. The core storage jig 3 in which the core 2 is set is carried on the first roller conveyor 1 to a position a.

In this state, the first table with rollers 6 is raised. The core storage jig 3 is carried onto the first table with rollers 6 by a conveying means (not shown). The position of the core storage jig 3 at this time is indicated by at.0 Next, the first table with rollers 6 is lowered, and the core storage jig 3 is placed on the traverse roller conveyor 8 for 4 degrees. , the extrusion device 1O is operated, and the extrusion head 11 advances the core storage jig 3 to the position a in the core briscent device 9, that is, onto the second table with rollers 14. After that, the extrusion head 11 of the extrusion device 10 retreats to the retreat end,
Prepare for the next cycle.

When the core storage jig 3 is placed on the second table with rollers 14, the second table with rollers 14 is raised to the position a4 by the linear actuator 16. As a result, the core holding jig 3 comes into close contact with the pad 21 under pressure. In this state, the gripping means 25 attached to the pressure head 21 allows
The core housing jig 3 and the pressure pad 21 are fastened together. After the fastening is completed, the linear actuator 16 lowers the second roller table 14 to the same level as the traverse roller conveyor 8. Simultaneously with the lowering of the second table with rollers 14, pressure is applied from a pressurized gas supply source (not shown) via the flexible hose 24 and piping joint 23 to the pressure head 21 and the core holding jig 3. Compressed air is supplied into the space 22.

The core storage jig 3 is provided with a plurality of suction holes 26 from the back in the part where the core 2 is set.In this state, the suction holes 26 are open to the atmosphere, so the core 2 has ( A pressing force corresponding to (total area of suction holes) x (applied pressure - atmospheric pressure) acts. Therefore, even if the core accommodating jig 3 is tilted or moved, the core 2 will not fall off from the core accommodating jig 3.

While in this pressurized state, the pressurizing head 21 is rotated 90 degrees by the rotary actuator 20, and the core holding jig 3 is
Tilt it to the position. As a result, the core storing jig 3 is placed in a vertical state in which the core can be stored. At this time, the core holding device 27 is waiting at position b without holding the core holding jig 3, and when the core holding jig 3 arrives at position a, it moves forward and the core holding jig 3 is moved forward. It comes into close contact with the back of the storage jig 3. Next, the core storing device 27 and the core storing jig 3 are fastened together by a gripping means (not shown) built into the core storing device 27. At the same time, the gripping means attached to the pressurizing rod 21 releases its grip on the core holding jig 3.

In parallel with these series of operations, the suction of the core storing device 27 is started from the time when the core storing device 27 and the core storing jig 3 come into close contact with each other. After this state is maintained until the suction force reaches a steady state, the pressure from the pressure head 21 is stopped. Through the above operations, the core 2 and the core holding jig 3 have been preset into the core holding device W27. Thereafter, the core-setting device 27 moves from b to C, where it performs the well-known core-setting process.

After the core storing is completed, the empty jig (core storing jig) 3 is returned to the position ah by the core storing device 27. At this time, the U-shaped frame 28 of the empty jig retrieval device has moved forward to the position d shown by the imaginary line in FIG. That is, the claws 29 are moved forward by the linear actuator 31 to clamp the empty jig 3. Thereafter, by releasing the grip of the gripping means built into the core holding device 27, the empty jig 3 becomes free from the core holding device 27. Subsequently, the frame 35 is moved by the two guide rods 36 by a linear actuator (not shown).
, the empty jig 3 is moved to position a7, and separated from the core holding device 27.

Next, actuate the linear actuator 39, move back all the members including the U-shaped frame 28 on the guide rod 38, and take out the empty jig 3 to the position as. 34 is activated to tilt the U-shaped frame 28 by 90 degrees.As a result, the empty jig 3 moves to position a and becomes horizontal. In this position, the empty jig 3 and the jig holder are in a positional relationship where the table 42 is in contact with them, and by releasing the grip of the claw 29 on the U-shaped frame 2, the empty jig 3 and the jig holder are placed on the table 42. Move to. Thereafter, the U-shaped frame 28 is tilted in preparation for the next cycle.

Next, by operating the rotary actuator 44, the parallel link 46 is driven, and the empty jig 3 is moved to the ale position on the second roller conveyor 4. The empty jig 3 placed on the second roller conveyor 4 is pushed by the empty jig extrusion device 48, moves on the second roller conveyor 4, and is recovered to the core setting workshop.

By repeating the above cycle, the cores can be continuously placed in the mold while circulating the core placement jig.

As is clear from the above, the core presetting device of this embodiment can be applied even if the shape and number of cores are different.
Therefore, it is possible to automatically store many types of cores, which has the excellent effect of shortening cycle time.

Furthermore, since there is no need to change the core for each type of core, it is possible to eliminate the time lost due to the change of the core.

Furthermore, when inserting the core into the core storage device,
Since the core in the core storage jig can be pressed with compressed air to stabilize its posture, automation such as robotization of core setting work becomes easy.

Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, but includes various embodiments within the scope of the claims.

〔Effect of the invention〕

As described above, the core presetting device of the present invention provides the following effects.

(b) If the shape and size of the core holding jig are determined in advance, it can be applied even if the shape of the core, number of inserts, etc. are different.

Therefore, it is possible to automatically store many types of cores, and the cycle time is shortened.

(b) The core holding device and core presetting device can be used for general purposes even if the shape and size of the core changes, so there is no need to change the settings for each type of core, thus reducing the time lost due to change of settings. can be eliminated.

(c) When setting the cores in the core presetting device, since the cores are placed in the core storage jig in advance, there is no effect on the number of inserts (therefore, the cores are not placed in the core presetting device). Setting time is reduced.

(d) During presetting, the core in the core holding jig can be pressed with pressurized gas to stabilize its posture, making it easy to automate the core setting work.

[Brief explanation of drawings]

1 is a sectional view taken along the line 1-1 in FIG. 3, FIG. 2 is an enlarged view of part A in FIG. 1, and FIG. FIG. 4 is a sectional view taken along the line IV-fV in FIG. 3, and FIG. 5 is a sectional view taken along the line ■-v in FIG. 3. 2.--.- Core 3.--111--. Core storage jig (empty jig) 17.-
------Single shaft 18・--1--・Bearing 19・--Single shaft----・Shaft coupling 20・-----1・-・Rotary actuator 17.18
．． 19.20 --- One rotation drive means 21 ---
-----・Pressure head 27・--------- Single core storage device Applicant: Toyota Motor Corporation Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A core presetting device for supplying a core and a core storing jig to a vacuum suction type core storing device used in a vertical molding machine, the core presetting device containing the core. A pressure head that can be brought into close contact with the jig and has a space for pressurizing the core; a gripping means that holds the pressure head and the core storage jig in close contact with each other; A core presetting device comprising: a pressurized gas supply means for supplying pressurized gas; and a rotation drive means for rotating a pressurizing head to the vicinity of the core storage device.