JPH0569927A - Mold carrier device - Google Patents

Abstract

PURPOSE:To prevent engagement and the like of a mold through a stopper by providing a drive unit for driving a series of rollers in a region corresponding to the mold, and a sensor for detecting the mold and for controlling the drive units. CONSTITUTION:Whether there is a mold W is detected at every drive unit 31 by sensors 41, 42 of own region, and when there is no mold W, mold carrying command is given to the drive units 31 located at its own region as well as upstream, so that the mold W is carried out from the upstream part. After the mold W is delivered from its own region of the upstream drive unit 31, the supply of the mold W is also carried out by a drive unit 31 on the further upstream part. In this way, the molds W are stored in order from the downstream one. When the mold W is detected by a deceleration sensor 41 while it is moved at a set highest speed, the drive unit is speed-controlled so that it is gradually decelerated, and when the mold W is detected by a stop sensor 42, the operation of the drive unit is forcibly stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold conveying device.

[0002]

2. Description of the Related Art As a mold conveying device constituting a casting line, as shown in FIGS. 6 and 7, a plurality of arms 3 projecting from a pair of endless chains 2 driven by a sprocket 1 are each provided with rollers. 4 rotatably rotatably supports the mold W on the roller 4 and conveys the mold W, or as shown in FIG. There is an intermittent feed system in which a member 6 that is reciprocally moved is locked by a pawl 7 that is rotatably supported and conveyed.

[0003]

In the top roller chain system, since the sprocket 1 and the chain 2 are constantly operating, when one mold W is locked by a stopper (not shown), the mold W As the roller 4 moves along the lower surface, the rear molds collide with each other and are stored. Therefore, the mold W and the roller 4 are likely to be worn, and the impact at the time of collision may cause "sand drop" in the sand mold in the mold, which may affect the quality of the cast product. Therefore, the conventional one is not suitable for a heavy mold and has a problem that high-speed feeding cannot be performed.

In the intermittent feeding method, the upper end of the claw 7 is raised when the mold W is fed, and the upper end of the claw 7 is lowered when the claw 7 is retracted on the lower surface of the mold W. The rotation of the claw 7 is performed by the weight balance of the claw 7 or by an electric means, but when relying on the weight balance of the claw 7, the reliability is poor,
Further, when the claw 7 is electrically operated, there is a problem that the structure becomes complicated and the cost becomes high.

The present invention has been made in view of the above points, and solves the problems caused by the abrasion and the impact at the time of collision during the conveyance of the mold, and the high-speed feeding is possible even in the case of a heavy mold. An object is to provide a high mold carrier.

[0006]

According to the present invention, a large number of rollers 24 are provided on a conveyor frame 21.
In the mold transporting device for transporting the mold W, the drive units 31 that are sequentially provided for each region corresponding to one mold W and drive the series of rollers 24 in each region, and the drive units 31 for each region are provided respectively. Mold W
And a sensor 42 for detecting each of the drive units 31 and controlling each drive unit 31.

According to a second aspect of the present invention, each drive unit 31 according to the first aspect includes a variable speed motor 32 that is gradually accelerated at the time of starting and is gradually decelerated at the time of stopping.

[0008]

According to the first aspect of the present invention, the presence or absence of the mold W is detected by the sensor 42 for each drive unit 31 in each area, and when there is no mold W, a mold transfer command is given to the own area and the drive unit on the upstream side. , Receives the mold W. The conveyed mold W is detected by the sensor 42 and stopped by stopping the operation of the drive unit 31, thereby preventing the molds from being locked by the stoppers or colliding with each other.

According to a second aspect of the present invention, a variable speed motor 32 is provided.
Thus, the mold W can be smoothly moved, and the inertial impact due to the rapid start and the rapid stop can be reduced, so that the maximum speed can be set to a large value, whereby the time required to move the mold W by a certain distance can be shortened.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in FIGS.

FIG. 5 is a plan view showing the outline of the casting line. The lower mold is made inside the lower frame by the lower mold making machine 11, and the lower mold is being conveyed at the core diaper line 12. The core is stored, and further, in the upper mold making machine 13, the upper mold is formed inside the upper frame, and this upper frame and the lower frame conveyed in the core diaper line 12 are combined in the frame alignment device 14. The integrated upper and lower frames are gradually conveyed by the stock line 15 and sent to the pouring device 16, and the pouring device 16 pours the molten metal into the mold. .. Further, this mold is conveyed to a frame separating device 18 via a product cooling line 17, the lower frame separated here is conveyed to the lower mold making machine 11 via a product take-out line 19, and the upper frame is an upper frame conveying line. It is conveyed to the upper molding machine 13 via 20.

As shown in FIG. 2, the mold conveying device used in each of the lines 12, 15, 17, 19, 20 has a large number of bearings 22 between a pair of conveyor frames 21 arranged in parallel. The rotary shafts 23 are rotatably mounted at a fixed pitch, and the mold transport rollers are installed inside the frames of the rotary shafts 23.
24 are fitted together. This roller 24 is a flange that restricts the movement of the mold W in the width direction as shown in FIG.
It has 25 in one.

As shown in FIG. 1, for each region corresponding to one mold W, a drive unit 31 for driving a series of rollers 24 in each region is sequentially provided.

Each drive unit 31 has a variable speed motor (inverter motor) 32 below the conveyor frame 21.
Is attached, and this motor 32 allows the endless chain 33
As shown in FIG. 2, two sprockets 34, which are sequentially rotated through the shafts, are integrally fitted to one end of each rotary shaft 23.

The mold unit W is provided in the drive unit 31 in each area.
Two kinds of sensors 41 and 42 for detecting the above and controlling each drive unit 31 are provided by a mounting plate 43, respectively. One sensor 41 is for decelerating the variable speed motor 32, and the other sensor 42 is for forcibly stopping the variable speed motor 32. Although these sensors 41, 42 are proximity switches, limit switches or photo sensors may be used.

Next, the operation of this embodiment will be described.

The presence or absence of the mold W is detected for each drive unit 31 by the sensors 41 and 42 in its own area, and when there is no mold W, a mold transfer command is given to the drive units 31 in its own area and the upstream side so that the mold W is sent from the upstream side. The mold W is transported. When the upstream drive unit 31 also carries out the mold W from its own area, it is similarly supplied with the mold W from the upstream drive unit 31. In this way, the mold W is sequentially stored from the downstream side.

As shown by the solid line in FIG. 4, the transfer speed of the mold W is gradually accelerated for a fixed time from the start, and when it is moving at the set maximum speed Vmax, it is used for the deceleration. When it is detected by the sensor 41 of
S1), the speed is controlled so that the speed is gradually reduced, and
When detected by the stop sensor 42 (S2 in FIG. 4),
It is forcibly deactivated. In this way, the mold W is stopped by stopping the operation of the drive unit 31, so that the stoppers do not lock the molds and impacts due to collision between the molds do not occur.

Further, by gradually controlling the acceleration and deceleration of the mold W, it is possible to reduce the generated inertial impact as compared with the case of rapidly starting and stopping the mold W as shown by the two-dot chain line in FIG. Since the maximum speed Vmax can be set large, the time required to move the mold W by a certain distance can be shortened.

[0020]

According to the invention described in claim 1, the roller is driven by the drive unit when necessary, and the drive unit is stopped in the state where the mold is stored. Therefore, the wear is generated between the mold and the roller. Less likely to occur,
Also, since the mold is stopped by stopping the operation of the drive unit, there is no impact due to the collision of the mold,
It is possible to prevent the quality deterioration of cast products due to "sand drop" in the mold. Therefore, high-speed feeding is possible even with a heavier mold than before. Furthermore, since the drive unit controlled by the sensor in the area unit corresponding to one mold, it is possible to perform highly reliable mold transfer, and it is possible to perform efficient storage with little empty space between the molds. Due to the relationship between the number of molds required in the casting line and the cycle, the number of expensive molds can be minimized, and the equipment area can be reduced by downsizing the storage line.

According to the second aspect of the present invention, each drive unit includes a variable speed motor that gradually accelerates at the time of starting and gradually decelerates at the time of stopping, so that the mold can be moved smoothly, and the mold can be rapidly started and stopped rapidly. Compared to the case, the generated inertial impact can be reduced, and the maximum speed can be set large, so that the time required to move the mold for a certain distance can be shortened.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a mold conveying device of the present invention.

FIG. 2 is a plan view of the mold transfer device of the above.

FIG. 3 is a side view of the mold transfer device.

FIG. 4 is a graph showing a change in a mold conveying speed by the same mold conveying device.

FIG. 5 is a plan view showing an outline of a casting line using the above mold conveying device.

FIG. 6 is a perspective view showing a conventional mold conveying device.

FIG. 7 is a cross-sectional view of the same conventional mold transfer device.

FIG. 8 is an explanatory view showing another conventional mold conveying device.

[Explanation of symbols]

 W mold 21 Conveyor frame 24 Roller 31 Drive unit 32 Variable speed motor 42 Sensor

Claims (2)

[Claims] 1. A mold transporting device for transporting a mold by a large number of rollers provided on a conveyor frame, the drive unit being sequentially provided for each region corresponding to one mold and driving a series of rollers in each region. And a sensor which is provided for each drive unit in each area and which detects a mold and controls each drive unit. 2. The mold conveying apparatus according to claim 1, wherein each drive unit includes a variable speed motor that gradually accelerates when starting and decelerates gradually when stopping.