JPS6239877Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a clamping device that applies pressure from the side to a mold that is continuously manufactured by a frameless molding machine after pouring metal.

(Prior art) When a cast product using a mold manufactured by a frameless molding machine is large or long compared to the mold size, or when the density of the cast product in the mold is increased for the purpose of improving productivity. Moreover, the thermal expansion of the mold that occurs after pouring the metal, and the volume change that occurs when the molten metal solidifies, are noticeable toward the sides of the mold, which has no restraining force other than the strength of the mold itself. As a result, a problem arises in that a cast product is produced whose dimensions are significantly larger, especially with respect to the horizontal mold dimensions.

As mentioned above, in order to suppress the mold from expanding in the horizontal direction (side surfaces), the following methods have been conventionally implemented.

(1) A side clamping device for the mold that moves in synchronization with the movement of the mold is provided, and this clamping device clamps the mold from the time of pouring until it cools down.

In this case, since the clamping device is moved, the overall scale of the casting equipment becomes large and complicated, requiring a large amount of equipment, and at the same time, the reliability of the equipment is reduced.

(2) A clamp device was installed that does not move in sync with the mold, but always holds the mold in place.

In this case, the clamping force of the clamping device has a limit so that it does not create resistance to the movement of the mold when the conveying device that moves the mold is operated, and the horizontal dimension expansion of the cast product is limited. It was impossible to completely prevent it.

(Purpose of the invention) In view of the above, this invention is based on the shape of the cast product,
The purpose of the present invention is to provide a clamping device for flaskless molds that can apply the necessary clamping force to the sides of the mold depending on the weight, etc., prevent the mold from expanding in the lateral direction, and obtain molded products with high dimensional accuracy. That is.

(Structure of the invention) In order to achieve the above object, the structure of this invention is as follows. In other words, in a casting machine using a flaskless mold, in which the mold is formed by a molding machine and then moved intermittently by a conveying device at predetermined pitches, and in the process, the mold is poured and cooled, a pair of flasks located on each side of the flaskless mold are used. a plurality of support frames formed to surround the mold and arranged at a predetermined distance in the direction of movement of the mold; a fixed clamp plate fixed to the mold; and a fixed clamp plate arranged opposite to the fixed clamp plate on the other side of the mold.
a movable clamp plate attached to the vertical frame side on the other side of the support frame so as to be able to move toward and away from the side surface of the mold; a means for pressing the movable clamp plate against the side surface of the mold with a predetermined force when the mold is stopped; and a movable clamp plate. A clamp device for a frameless mold is formed by a movable clamp plate and a support frame support device that enables the support frame to move in the opposite direction by the reaction force generated in the mold when the mold is pressed against the side of the mold. be.

(Example) Next, this invention will be explained based on an example shown in the drawings.

Fig. 1 shows a part of a flaskless mold casting device, in which a flaskless mold A (see Fig. 2) formed by a molding machine (not shown) is inserted into the flaskless mold casting device. A conveyance device 1 is provided for conveying the hot water to a position where it is cooled after the hot water has been poured. This conveying device 1 has a plurality of long fixed beams 2 arranged in parallel at predetermined intervals in the longitudinal direction of the casting device.
A movable beam 3 is provided between each fixed beam 2, as shown in FIG. The fixed beam 2 supports the frameless mold A (hereinafter referred to as the mold) on its upper surface, and the upper surface of the movable beam 3 is normally located below the upper surface of the fixed beam 2, and when it is transported, it is raised and fixed. After lifting mold A on beam 2 higher than the upper surface of fixed beam 2,
Pitch) After moving in the feeding direction of the mold A, the mold A is processed, placed on the fixed beam 2, and returned to the starting position. That is, this conveying device 1 moves the mold A intermittently one pitch at a time.

As shown in FIG. 2 and FIG.
4A are provided in parallel at a predetermined distance, and both supporting members 4, 4A are supported by support columns 5, 5A arranged in two rows at a predetermined distance on the floor F, respectively. There is. The support frame 6 constituting the clamping device for the mold A has an upper horizontal frame 7 disposed above the mold A supported by the transport device 1 at right angles to the feeding direction of the mold A. 1 , there is a lower transverse frame 8 arranged parallel to the upper transverse frame 7 . The upper horizontal frame 7 and the lower horizontal frame 8 are
A left vertical frame 9 having a portion extending downward from the lower horizontal frame 8 at each end thereof and a right vertical frame 10 are connected by bolts (not shown), respectively. Therefore, the support frame 6 is a gate-shaped frame. Left vertical frame 9 of support frame 6
A lower bracket 11 is fixed to the inner surface of the lower end of a portion extending downward from the lower horizontal frame 8, and this lower bracket 11 and the left support member 4
A left connecting arm 13 is attached to the upper bracket 12 attached to the outer surface of the
is attached to the shaft. Similarly, right vertical frame 1
A right connecting arm 13A is also pivotally attached to a lower bracket 11A attached to the inner surface of the lower end of the right support member 4A and an upper bracket 12A attached to the outer surface of the right support member 4A by means of support shafts 14A and 15A. Therefore, the support frame 6 is supported by the left and right connecting arms 13, 13A, the support members 4,
4A and both supports 5, 5A in a suspended manner. A plurality of support frames 6 are arranged in series at a constant distance in the direction of movement of the mold A. The fixed clamp plates 16 attached to the two adjacent support frames 6, 6 are rectangular members with a rectangular box-shaped cross section in which the length in the vertical direction is longer than the length in the lateral direction. It is attached to the left vertical frames 9, 9 of. This fixed clamp plate 16 has a slight gap between its inner surface 16a and one side surface A1 of the mold A supported by the conveying device 1, as shown in FIG. The connecting frame 17 is a rectangular member having a rectangular box-shaped cross section like the fixed clamp plate 16, and both ends thereof are fixed to the two adjacent right vertical frames 10, 10. A movable clamp plate 18 having the same shape as the fixed clamp plate 16 pushes the other side surface A2 of the mold A on the opposite side to the fixed clamp plate 16, and is provided facing the fixed clamp plate 16. This movable clamp plate 18 is attached to two adjacent right vertical frames 1.
A pair of upper and lower guide rods 19, 19 are fixed in positions close to 0 and 10, and these guide rods 19, 19 are attached to upper and lower brackets 20, 20 fixed to the side surface of the right vertical frame 10. The guide holders 21 and 21 are horizontally slidably supported. Guide rod 19
A spring retainer 22 is attached to the end protruding from the guide holder 21 of the guide rod 19.
A compression spring 23 is fitted between the spring holder 22 and the end of the guide holder 21 . This compression spring 23 connects the movable clamp plate 18 and the connecting frame 17.
The movable clamp plate 18 has the effect of pulling it to the side.
is pulled away from side A2 of mold A. On the other hand, four rubber balloon-shaped actuators 24 are inserted between the movable clamp plate 18 and the connection frame 17, respectively. Although not shown, compressed air is supplied to the actuator 24.

Next, the operation of this embodiment will be explained.

Normally, when the molding machine finishes molding the mold A, the mold A is transported by one pitch by the moving beams 3 to 3 of the transport device 1. While each mold A is being transported and moved by the transport device 1, all compressed air within each actuator 24 is discharged to the outside. For this reason, all movable clamp plates 18
The connecting frame 17 is compressed by the action of the compression spring 23.
It is pulled to the side, and a small gap is created between it and the side surface A2 of the mold A. On the other hand, all the fixed clamp plates 16 are connected to the mold A being transported as described above.
A minute gap is formed in advance between the side surface A1 and the side surface A1. Therefore, when compressed air is not supplied to each actuator 24, each mold A moves without being subjected to resistance from the fixed and movable clamp plates 16 and 18. Then, when each mold A finishes moving by one pitch, compressed air at a predetermined pressure is supplied to each actuator 24. Therefore, the actuator 24 expands and moves the movable clamp plate 18 against the side surface A2 of the mold A against the biasing force of the compression spring 23.
Move it in the direction of pressing it. At this time, the four guide rods 19 of the movable clamp plate 18 are guided by the respective guide holders 21 of the connection frame 17, and the movable clamp plate 18 moves in parallel. When the movable clamp plate 18 thus moved is pressed against the side surface A2 of the mold A, the movable clamp plate 18 receives a reaction force from the mold A that is equivalent to the pressing force. Each support frame 6 of the clamping device is connected to two connecting arms 1 on the left side.
3, 13 and the two connecting arms 13A, 1 on the right side
3A, the movable clamp plate 18 is easily pushed back by the reaction force of the mold A. Therefore, each support frame 6 moves laterally while maintaining its horizontal position, and the fixed clamp plate 16
is pressed against the side surface A1 side. Each support frame 6
The movement ends when the fixed clamp plate 16 and the movable clamp plate 18 come into contact with both side surfaces A1 and A2 of the mold A, respectively, and each actuator 24 is filled with compressed air at a predetermined pressure.

As is clear from the above explanation, when a large clamping force is applied to the mold A by each fixed clamp plate 16 and movable clamp plate 18 of the clamp device, each support frame 6 of the clamp device moves, and the mold A itself is clamped without lateral displacement.

Therefore, when the mold A is transported by the transport device 1, compressed air is removed from each actuator 24, and when the mold A is stopped, the compressed air is removed from each actuator 24.
By supplying compressed air to the casting line, even pressure is applied to both sides of the mold without disturbing the mold transport function of the molding line, preventing the mold from expanding in the lateral direction, and preventing the mold from expanding in the lateral direction. It is possible to prevent the size from expanding. Furthermore, by clamping the mold with a clamping device when pouring the metal into the mold, it is possible to prevent the mold from cracking due to heat, pressure, shock, etc. during pouring, and it is also possible to prevent mold from leaking due to cracks in the mold.

In addition, when clamping the mold, it goes without saying that the pressure of the compressed air supplied to the actuator 24 may be adjusted depending on the weight of the molten metal to be poured into the mold, the length of the cast product, the arrangement density, etc.

Further, the device for supporting the support frame 6 in a pendulum shape is not limited to this embodiment.

(Effect of the invention) As is clear from the above explanation, according to this invention, when pouring into a flaskless mold and during the process of conveying the mold until the molten metal in the mold cools down, when the mold is stopped, both sides of the mold are Since a uniform clamping force can be applied and the clamping force can be adjusted, the necessary clamping force can be applied according to the shape, weight, and placement density of the cast product, eliminating lateral dimension expansion of the mold and improving dimensional accuracy. It is possible to obtain high quality casting products.

[Brief explanation of the drawing]

The figure shows an embodiment of this invention. Figure 1 is a cutaway side view showing a part of the frameless mold conveying device and clamping device, and Figure 2 is a sectional view taken along the line - - of Figure 1 (mold clamped state). , FIG. 3 is a sectional view taken along the line 1 in FIG. 1 (mold clamped state), and FIG. 4 is a diagram showing a state in which the mold is not clamped at the position shown in FIG. 3. A... Frameless mold, A1, A2... Side, 1...
Conveyance device, 4, 4A... Support member, 5, 5A...
Pillar, 6...Support frame, 9...Left vertical frame, 10
...Right vertical frame, 11, 11A...Lower bracket, 12, 12A...Upper bracket, 13,
13A...Connection arm, 14,14A...Spindle,
15, 15A... Support shaft, 16... Fixed clamp plate, 18... Movable clamp plate, 19... Guide rod, 21... Guide holder, 24... Actuator.

Claims (1)

[Scope of utility model registration request] In a casting machine using a flaskless mold, which is formed by a molding machine and has parallel sides, and which is moved intermittently by a conveying device in predetermined pitches and is poured and cooled in the process, there are molds on both sides of the flaskless mold. A plurality of support frames are formed to surround the mold and have a pair of vertical frames positioned at a predetermined distance in the direction of movement of the mold; A fixed clamp plate fixed to a vertical frame on one side, and a vertical frame side on the other side of the support frame, which is arranged parallel to and opposite to the fixed clamp plate on the other side of the mold, and can be moved into and out of contact with the side surface of the mold. a movable clamp plate attached to the mold; a means for pressing the movable clamp plate against the side surface of the mold with a predetermined force when the mold is stopped; A clamping device for a frameless mold, comprising a support frame support device that enables movement of the support frame in a direction opposite to the direction in which the plate moves.