JPS625811Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is an improvement in automatic mold making that uses both the blow method and squeeze method by alternately bringing in upper and lower molds for casting. It is related to.

(Conventional technology) Conventionally, the molding machine used was
There is one shown in FIG. 1 of Publication No. 49-115932 (FIG. 7 of the present application). To briefly explain the above Fig. 7, it has a mold flask 33 which is open at the bottom and has a press ram 31 and a sand frame 32 at the top, and gas introduction cases 34 and 35 connected to a gas supply source on the peripheral surface. A compression head 38 having a plurality of transfer nozzles 37 is arranged vertically in an internal sand chamber 36, and a mold plate 4 supporting a mold 39 is placed below the mold flask 33.
0 is supported on a piston rod 41 so that it can be moved up and down.

In the case of the above, place the mold flask on the template, raise the template, and bring the upper edge of the mold into close contact with the packing of the sand frame, then open the shutter and pour the molding sand into the sand chamber. When the shutter is closed again, pressure gas is introduced into the sand chamber, and this pressure gas penetrates into the foundry sand. is injected into the intermediate space between. The mold plate is then moved slightly upwards to force out the pressurized gas in the sand through the exhaust hole into the atmosphere, making the density of the sand uniform, which lengthens the working time required to fill the mold. Not only was it inefficient, but it was also extremely uneconomical because the pressurized gas had to be maintained at a considerably high pressure.

(Problems that the invention aims to solve) In order to solve these problems, this invention uses a combination of blowing method and squeezing method to easily introduce casting sand into the formwork and improve workability through efficient molding. and a reduction in equipment costs due to the simplicity of the mechanism that operates the upper and lower formwork separately.

(Means for solving the problem) The technical means taken by this invention to solve the problem is to arrange two conveyors in parallel that feed the upper and lower formwork separately, and to A squeeze table is provided approximately in the middle of the H-shaped joint conveyor, a bucket conveyor with a movable hopper is installed between the squeeze table and a fixed hopper, and a pressure-resistant lid with air hoses above and below the squeeze table. A squeeze cylinder is provided, and a skirt for preventing sand leakage is fitted to the movable hopper so that it can be raised and lowered.

(Function) The space between the upper die carried into the squeeze station via the joint conveyor and the lower part of the movable hopper is covered with a skirt, and after casting sand is poured into the skirt and the movable hopper,
The molding sand in the upper mold is compacted by pushing the upper mold up by the length of the skirt.

(Example) Hereinafter, an example of this invention will be described in detail based on the drawings.

In the embodiment of this invention, as shown in FIGS. 1 to 5, carry-in conveyors 3 and 4 for carrying in upper and lower molds 1 and 2 separately are arranged in parallel with a required interval. A joint conveyor 5 is provided between the two transport conveyors 3 and 4, and the joint conveyors 3 and 4 are connected in a substantially H shape. , 6'
and a mold release station 8, 8' having frames 7, 7' for lifting the mold, and a squeeze table 9 waiting for the mold 1 carried in from the carry-in conveyors 3, 4 to the mold release station 8, 8'; Pattern plate A (upper mold) on 9' or the same
A' (lower mold) is placed on the squeeze table 9 or 9' to release the mold 1 or 2 sent out after molding with the casting sand C, and then placed on the carry-out conveyor 3a or 4a. It is connected so that it can be replaced. The squeeze tables 9, 9' are mounted so as to be movable alternately on the splicing conveyor 5, and reciprocate between the squeeze station 10 and the mold release stations 8, 8' to convey the formwork 1 or 2. . squeeze station 1
0 is provided with a guard frame 14 equipped with an operating cylinder 11 for pushing up the squeeze table 9 and squeezing it at the bottom, and a guard arm 13 for guarding the movable hopper 12 (to be described later) from floating during squeezing. A pressure-resistant lid 16 to which an air hose 15 for compressed air is connected is arranged above the frame 14 so that it can be raised and lowered by an operating cylinder 6''. A skirt 19 for preventing sand leakage is fitted to the lower outer periphery of the movable hopper 12 so as to be movable up and down.
When the presser plate 21 is lowered, the lower part of the movable hopper 12 and the formwork 1 or the same standby at the squeeze station 10 They are connected to cover the space between the two. The phototubes 22, 22' are arranged on the sides of the mold release stations 8, 8', and are connected to a control panel 23.
This control panel 23 is placed in the guard frame 14 and other appropriate positions, and the control panel 23 controls each incoming conveyor 3 and 4, each outgoing conveyor 3a and 4a, the joint conveyor 5, and the bucket conveyor 18. The automatic molding apparatus B is electrically controlled such as starting and stopping of the mold release stations 8, 8', the squeeze station 10, the movable hopper 12, and the operating cylinders 6, 6', 11, 11a, etc. Configure.

When the start switch of the carry-in conveyor 3, which is waiting with the upper formwork 1 loaded thereon, is turned on, the carry-in conveyor 3 shown in FIG. , the mold frame 1 is transferred to the waiting upper mold pattern plate A in the mold release station 8 shown in FIG. 5 to move the splicing conveyor 5 in the direction of the arrow P in FIG. A table 9 is made to stand by inside a squeeze station 10. In response to this movement stop signal, the bucket conveyor 18 shown in FIGS. 1 and 2 is started, and the bucket conveyor 1
8 in the opposite direction of the arrow P1, the movable hopper 12 with casting sand C previously charged below the fixed hopper 17 and on standby is moved in the same direction.
Squeeze station 1 installed in the direction of movement
0 into the dashed line 12a in FIG. 2 and the solid line 12 in FIG.
The bucket conveyor 18 is fed and stopped as shown in FIG. In response to this stop signal, the actuating cylinders 11a and 11a shown in FIGS. 5 and 6 are started and press down the holding plate 21 supported via the rods 20 and 20, so that the holding plate 21 is on standby in the downward direction. The skirt 19 is hooked and pushed down, and the skirt 19 is pushed down until it comes into contact with the upper surface of the formwork 1 on the squeeze table 9, and then stopped. By lowering this skirt 19, the space between the lower part of the movable hopper 12 and the upper part of the formwork 1 is reduced.
Covered without any gaps. The actuation cylinders 11a, 11a are activated by this signal to stop the descent of the skirt 19.
operates in the opposite direction to restore the presser plate 21, and the return signal starts the operating cylinder 6'', so the pressure-resistant lid 16 supported via the rod 20 is lowered and the waiting movable hopper moves in the downward direction. 12 is covered,
Wait while applying pressure to the pressure-resistant lid 16 in that state. The solenoid valve (not shown) of the compressor and other air supply sources operates in response to this signal indicating the end of the lid, and the compressed air is transferred to the air hose 15.
Since the sand C in the movable hopper 12 is press-fitted into the movable hopper 12 through the air pressure, the sand C in the movable hopper 12 passes through the inside of the skirt 19 from the through bottom (lattice or mesh) 24 of the movable hopper 12. The casting sand C is extruded into the mold 1 and is then piled up in the required amount inside the mold 1 to complete the injection. Subsequently, the actuating cylinder 11 shown in FIG. 6 is started by the signal indicating the end of casting sand C, and the push plate 25 attached to the rod 20 pushes up the squeeze table 9, and at the same time pushes the pattern plate A and the formwork 1. As the skirt 19 placed on the formwork 1 rises, the skirt 19 returns to the starting position, and at the same time, the casting sand C that had risen inside the skirt 19 is removed from the formwork 1. The squeeze is completed at that point. When this squeeze end signal is received, the operating cylinder 1
1 operates in the opposite direction to retract the push plate 25, and upon the signal of the end of the operation, the operating cylinder 6'' is operated to close the pressure-resistant lid 1.
At the same time, the bucket conveyor 18 is started to return the movable hopper 12 to the starting position, and while waiting, the damper (not shown) of the fixed hopper 17 is operated to replenish the casting sand C. Wait for the next action. On the other hand, the squeeze table 9 returns to the mold release station 8 at the starting position and stops by moving in the opposite direction of the arrow P by starting the splicing conveyor 5 in the opposite direction to that described above using the same signal. At this time, the formwork 2 has been placed on the squeeze table 9' on which the pattern plate A' of the lower mold, which has been waiting at the mold release station 8' on the opposite side, is placed in advance, so the work is done first. The completed squeeze table 9 is replaced by the squeeze table 9', which enters the squeeze station 10, and the above procedure is repeated to continuously perform the molding operation.

On the other hand, after the molding is finished, the mold 1 is placed on the mold release station 8.
When the pattern plate A returns, the actuating cylinder 6 is activated by the signal, and the formwork 1 is lifted up as shown in Fig. 3 through the frame 7 supported by the rod 20, and the formwork 1 is released from the pattern plate A and left as it is. This formwork 1 is transferred onto a carry-out conveyor 3a using a hanger (not shown). This reloading operation and the work of reloading the formworks 1 and 2 onto the splicing conveyor 5 only require the operator's assistance.

By repeating the above operations, when the formworks 1 and 2 reach the next step of inserting the core at the end of the carry-out conveyors 3a and 4a, the cores are incorporated into the formwork 2 and the formwork 2 is placed in the normal state. Stack the molds 1 as shown to complete the casting preparation.

(Effects) This invention, configured as described above, has the following advantages.

(1) Since the mold is pushed up by the length of the skirt, the time required for molding can be significantly shortened and the molding mechanism can be simplified, and the workability of the process after core insertion can be greatly improved. It is raised to

(2) The simplification of the mechanism allows for tighter turning, making it extremely convenient for producing a wide variety of products in small quantities.

(3) Even if the molds that have been made are damaged during the transportation process, the molds that have been made one after another are waiting on the delivery conveyor, so there is no need to interrupt the next process, making it extremely efficient. And convenient.

(4) Compared to conventional methods, it has great effects, such as improving work capacity and cutting equipment costs by half.

[Brief explanation of the drawing]

Fig. 1 is an overall view of the device of the present invention, Fig. 2 is a partially enlarged side view taken along line X-X in Fig. 1, and Fig. 3 is a partial enlarged side view taken along line Y-Y and Y'-Y'. Enlarged side view,
Fig. 4 is an explanatory diagram of the mold release procedure, Fig. 5 is an enlarged front view partially cut away along the Z-Z line in Fig. 1, Fig. 6 is an explanatory diagram of squeezing, and Fig. 7 is the conventional technique. FIG. Explanation of symbols of main parts, 1, 2...Formwork, 3,
4... Carrying in conveyor, 3a, 4a... Outgoing conveyor, 5... Joint conveyor, 6''... Working cylinder, 8, 8'... Release station, 9, 9'...
Squeeze table, 10... Squeeze station, 11... Operating cylinder, 12... Movable hopper, 15... Air hose, 16... Pressure resistant lid, 17... Fixed hopper, 19... Skirt,
21...Press plate, B...Automatic molding device.

Claims (1)

[Claims for Utility Model Registration] Carrying in conveyors 3, 4 and carrying out conveyors 3a, 4a for moving the upper and lower formworks 1, 2 separately are arranged in parallel, and both carrying out conveyors 3, 4 and 3a,
4a, both discharge conveyors 3, 4 and 3a,
4a in a substantially H-shape in plan view and reciprocates a movable hopper 12 having a skirt portion 19 at the bottom. , 2 is provided, and above the squeeze station 10,
There is an automatic molding device B in which a pressure-resistant lid 16 having an air hose 15 is arranged so as to be movable up and down via an operating cylinder 6'' for squeezing, and a fixed hopper 17 for storing casting sand C in the upper part, and a presser plate 21 in the lower part. A movable hopper 12 is provided with a skirt 19 that can be raised and lowered through the movable hopper 12 so as to be able to reciprocate on the splicing conveyor 5. Cover the space with the skirt 19 and move the movable hopper 1.
2 and the skirt 19, the upper molds 1 and 2 are raised to compact the molding sand in the skirt 19 by upward pressure. .