CN101279358B - Molding method of upper and lower molds without sand box - Google Patents

Abstract

A high-efficiency molding method and device for upper and lower casting molds without a sand box. The upper mold-making box and the lower mold-making box in a horizontal state, which are respectively provided with molding sand blowing inlets on the side walls, clamp the double-sided template; Insert the upper and lower compression devices to form upper and lower molding spaces; a pair of molding upper box and molding lower box and double-sided templates rotate to a vertical state, and the molding sand blowing inlet moves upward; blowing into the upper and lower molding spaces from the molding sand blowing inlet The molding sand is filled; the upper and lower compression devices further enter the upper and lower molding spaces to compress the molding sand, and the mold-making upper box, the mold-making lower box and the double-sided template return to the horizontal state; After the side template is separated, the double-sided template is moved out of it; if necessary, after the core is set in the molded mold, the mold-making upper box with the mold inside and the mold-making lower box overlap; the mold-making upper box with the mold inside The casting mold is pulled out after overlapping with the molding lower box.

Description

Molding method of upper and lower molds without sand box

The application date is December 17, 2004, the application number is 200480042378.2 (the international application number is PCT/JP2004/018897), and the title of the invention is "Moulding method and molding device for upper and lower casting molds without sand box". Divisional application.

technical field

The invention relates to a molding method and a molding device for overlapping upper and lower casting molds without sand boxes.

Background technique

An existing mold molding device of this type adopts the method of making the upper and lower pairs of sand boxes perform interactive and intermittent reciprocating motions between the molding sand compression workstation and the sand box extraction workstation and make the upper and lower pairs of sand boxes coincide. The upper and lower molds without sand box are used for molding. Wherein the molding sand compression workstation is located above the abutment, and compresses the molding sand in a direction relatively horizontal to the bed surface. The sand box extraction workstation is located near the bed surface of the abutment, and performs casting mold positioning and sand box extraction in a direction relatively perpendicular to the bed surface.

Yet the efficiency of mold molding is not high in the existing upper and lower mold molding device without sandbox of this kind of structure composition, and the mold of molding also has problems such as room for improvement on the quality.

Patent Document 1; Japanese Patent Laid-Open No. 62-16736.

Contents of the invention

The object of the present invention is to provide a method for molding upper and lower molds without a flask, and a molding device thereof, which solve the problems of low mold molding efficiency and room for improvement in mold quality after molding.

The first invention of the present application is a molding method of a superposed upper and lower mold without a flask, which includes:

A pair of horizontal mold-making upper boxes and mold-making lower boxes with molding sand blowing inlets on the side walls hold the double-sided templates;

The upper and lower compression devices are respectively inserted into the openings of the pair of mold-making upper box and mold-making lower box without double-sided templates to form two upper and lower molding spaces;

The above-mentioned pair of mold-making upper boxes, mold-making lower boxes and double-sided templates are rotated to a vertical state, and the above-mentioned molding sand blowing inlet is moved upward;

Blow molding sand into the upper and lower molding spaces from the above-mentioned molding sand blowing inlet for filling;

The above-mentioned upper and lower compression devices further enter the upper and lower molding spaces and compress the molding sand, and the above-mentioned pair of mold-making upper boxes, mold-making lower boxes and double-sided templates return to a horizontal state;

After the above-mentioned pair of mold-making upper box and mold-making lower box with casting molds inside are separated from the above-mentioned double-sided template, the double-sided template is moved out from the middle of the above-mentioned pair of mold-making upper box and mold-making lower box;

If necessary, after a mold core is set in the cast mold after molding, a pair of mold-making upper box and a mold-making lower box with the mold inside overlap;

After the molding upper box and the molding lower box of the above-mentioned casting mold are overlapped, the above-mentioned casting mold is pulled out therefrom.

Through the above-mentioned method, it is possible to realize the positive and progressive effect that molding can be efficiently carried out in a shorter time than the conventional molding method of the upper and lower casting molds without a flask.

The second invention of the present application is to insert the upper and lower molds respectively into the openings of the pair of mold-making upper box and mold-making lower box without double-sided templates in the molding method of a kind of superimposed upper and lower molds without sand boxes in the first invention. The compression device, the process of forming the upper and lower molding spaces, and the above-mentioned pair of mold-making upper box, mold-making lower box and double-sided template rotating to a vertical state, and the process of moving the above-mentioned molding sand blowing inlet upward can be carried out simultaneously.

Through the above method, the production efficiency of the casting mold can be made higher.

The third invention of the present application is that in the molding method of a kind of superimposed upper and lower casting molds without flasks in the first invention, the above-mentioned upper and lower compression devices further enter the upper and lower molding spaces and compress the molding sand, and the above-mentioned pair of mold-making upper boxes and In the step of returning the lower molding box and the double-sided formwork to the horizontal state, the above-mentioned pair of upper molding box, the lower molding box and the double-sided template return to the horizontal state while compressing.

Through the above method, the production efficiency of the casting mold can be made higher.

The fourth invention of the present application is that in the molding method of an overlapping upper and lower casting mold without a flask in the first invention, the above-mentioned upper and lower compression devices are upper and lower positive pressure plates.

Through the above method, a simpler molding method can be provided compared with the method using the existing molding device of the upper and lower molds without the flask.

The fifth invention of the present application is that in the molding method of an overlapping upper and lower casting mold without a flask in the first invention, the above-mentioned upper and lower compression devices are a plurality of upper and lower compression feet.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The sixth invention of the present application is that in the molding method of the upper and lower casting molds without a superimposed flask in the fourth invention, the above-mentioned steps of moving the upper and lower positive pressure plates back for a certain stroke and two steps of moving up and down from the above-mentioned molding sand blowing inlet are added. The step of blowing molding sand into the molding space to fill it.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The seventh invention of the present application is that in the molding method of an overlapping upper and lower mold without a flask in the sixth invention, the step of retreating the upper and lower positive pressure plates by a certain stroke and the two molding spaces up and down from the molding sand blowing inlet The step of filling with molding sand by internal blowing is carried out at the same time.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The eighth invention of the present application is that, in the molding method of the upper and lower casting molds without a superimposed flask in the fifth invention, inserting them into the openings without double-sided templates in the pair of mold-making upper box and mold-making lower box respectively The upper and lower compression device, the step of forming the upper and lower molding spaces includes the template part of the double-sided template and the intervals between the plurality of upper and lower compression feet in the above-mentioned upper and lower compression devices opposite to it. Roughly the same steps for each ratio.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The ninth invention of the present application is to insert the upper and lower molds into the openings of the pair of mold-making upper box and mold-making lower box without double-sided templates, respectively, in the molding method of the upper and lower molds without the overlapping mold boxes of the fifth invention. The compression device, the step of forming the upper and lower molding spaces includes the template part of the above-mentioned double-sided template and the space between the plurality of upper and lower compression feet in the above-mentioned upper and lower compression devices opposite to it, so that the molding sand is in a state where it is easy to flow A step of.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The tenth invention of the present application is that in the molding method of the upper and lower casting molds without a superimposed flask of the fifth invention, the template part of the above-mentioned double-sided template and the plural upper and lower compression devices of the above-mentioned upper and lower compression devices opposite to it The step of compressing the space between the feet so that the molding sand is in an easy-to-flow state includes spraying air at the nozzle part of the loose sand tank (especially the necking part of the nozzle) and the part with poor fluidity of the molding sand to reduce the amount of sand and loose sand. Steps for the frictional resistance of the sidewall of the sand tank.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The eleventh invention of the present application is the step of blowing molding sand from the above-mentioned molding sand blowing inlet to the upper and lower molding spaces for filling in the molding method of the upper and lower casting molds without a overlapping flask in the fifth invention and the above-mentioned The steps of the upper and lower compression devices further entering the upper and lower molding spaces and compressing the molding sand also include:

The first molding sand blowing step of blowing molding sand into the upper and lower molding spaces formed by the molding sand blowing inlet into the vertical double-sided formwork, the upper and lower molding boxes and the upper and lower compression devices;

The plurality of upper and lower compression legs in the upper and lower compression devices respectively enter the upper and lower molding spaces to compress the molding sand in the first compression step;

The second molding sand blowing step of blowing molding sand into the upper and lower molding spaces from the above-mentioned molding sand blowing inlet with the plurality of upper and lower compression feet in the above-mentioned up-and-down compression device retreating;

The compression planes of the plurality of upper and lower compression legs in the above-mentioned upper and lower compression device are in a flush state, and the plurality of upper and lower compression legs enter the above-mentioned upper and lower molding space together to compress the molding sand in the second compression step.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The twelfth invention of the present application is a molding device for a superimposed upper and lower mold without a flask, which includes:

The molding upper box and the molding lower box, which are respectively provided with molding sand blowing inlets on the side walls, are connected by connecting rods so that the molding upper box and the molding lower box can freely approach and distance from the ground;

The double-sided formwork between the mold-making upper box and the mold-making lower box of the upper and lower sandbox assembly can be accessed by moving in and out of the mechanism;

a molding sand compression mechanism, which is arranged such that,

The above-mentioned upper and lower sand box components can be installed and disassembled through a plurality of clamping mechanisms,

The above-mentioned mold-making upper box and the mold-making lower box clamp the above-mentioned double-sided template,

The above-mentioned upper and lower compression devices can respectively enter and exit the openings without double-sided templates in the above-mentioned mold-making upper box and mold-making lower box,

The mold-making upper box and the mold-making lower box can be rotated clockwise or counterclockwise in the vertical plane with the support shaft as the center between the vertical position and the horizontal position;

A rotary drive mechanism that makes the molding sand compression mechanism rotate clockwise and counterclockwise;

A molding sand blowing mechanism that blows molding sand from the molding sand blowing inlet into the molding upper box and the molding lower box in a vertical state by the driving of the rotary driving mechanism.

With such a configuration, it is possible to achieve a positive progressive effect that molding can be efficiently performed in a shorter time than the conventional molding device for molding the upper and lower molds without a flask for such casting.

The thirteenth invention of the present application is that in the twelfth invention, in the molding device of the upper and lower casting molds without flasks, the above-mentioned compression device is the upper and lower positive pressure plates.

Such a configuration can provide a molding device for upper and lower molds without a flask with a simpler structure.

The fourteenth invention of the present application is that in the twelfth invention of a molding device for a superimposed upper and lower mold without a flask, the above-mentioned compression device is an upper and lower compression foot.

Such a configuration can provide a molding device for upper and lower molds without a flask with a simpler structure.

The fourteenth invention of the present application is that in the molding device of the overlapping upper and lower casting molds without a flask in the twelfth invention, the above-mentioned upper and lower compression devices are a plurality of upper and lower compression feet.

The above method can provide a molding method of high-quality upper and lower casting molds with uniform casting sand density.

The fourteenth invention of the present application is that in any one of the overlapping molding devices for upper and lower casting molds without a flask in any of the twelfth inventions to the fourteenth inventions, the above-mentioned clamping mechanism includes a pair of swing hydraulic cylinders, and is embedded in The claw on the rocking shaft of the rocking hydraulic cylinder can clamp the connecting rod of the above-mentioned upper and lower sand box components.

With such a configuration, it is possible to achieve a positive progressive effect that molding can be efficiently performed in a shorter time than the conventional molding device for molding the upper and lower molds without a flask for such casting.

Description of drawings

Fig. 1 is a schematic diagram of the front structure of the best embodiment of the casting molding device using the positive pressure plate as the compression device in the present invention.

FIG. 2 is a partially cutaway front view of FIG. 1 .

FIG. 3 is a partially omitted plan sectional view of FIG. 1 .

Fig. 4 is a schematic diagram of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in Fig. 1 .

Fig. 5 is a schematic diagram of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in Fig. 1 .

Fig. 6 is a schematic diagram of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in Fig. 1 .

Fig. 7 is a schematic diagram of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in Fig. 1 .

Fig. 8 is a schematic diagram of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in Fig. 1 .

Fig. 9 is a schematic view of the front structure of the best embodiment of the casting molding device using the compression foot as the compression device in the present invention.

FIG. 10 is a partial cross-sectional view of FIG. 9 .

FIG. 11 is a partially omitted plan sectional view of FIG. 9 .

FIG. 12 is a schematic diagram of the operation of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in FIG. 9 .

Fig. 13 is a schematic diagram of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in Fig. 9 .

Fig. 14 is a schematic diagram of part of the process of molding a mold using the upper and lower mold molding device without a flask shown in Fig. 9 .

Detailed ways

According to FIG. 1-FIG. 8, the best embodiment of the upper and lower casting mold molding device without a flask suitable for the present invention will be described in detail.

As shown in Figures 1-3, a molding device for an upper and lower casting mold without a sand box includes: a machine 1 formed with an internal space;

It includes an upper and lower molding box assembly 27 with a pair of molding upper box 2 and molding lower box 3 respectively provided with molding sand blowing inlets on the side walls, wherein the molding upper box 2 and molding lower box 3 pass through a pair of connecting rods 18 , 18 are connected and can freely approach and stay away from each other;

The double-sided formwork 5 between the molding upper box and the molding lower box 2, 3 of the upper and lower sand box assembly 27 can be accessed by moving in and out of the mechanism 4;

the molding sand compression mechanism 9, which is arranged such that,

The above-mentioned upper and lower sand box components 27 can be installed and disassembled by a pair of clamping mechanisms 28, 28,

The above-mentioned double-sided template 5 can be clamped by the above-mentioned molding upper box and molding lower box 2,3,

The upper and lower positive pressure plates 6, 7 of the upper and lower compression devices can be respectively inserted into and withdrawn from the openings of the above-mentioned mold-making upper box and the mold-making lower box 2, 3 without the above-mentioned double-sided template 5,

The above-mentioned double-sided template 5 is clamped so that the above-mentioned mold-making upper box and the mold-making lower box 2, 3 can be centered on the support shaft 8 installed in the center of the upper part of the above-mentioned machine 1 between the vertical state and the horizontal state. Rotate clockwise and counterclockwise in the vertical plane;

Two laterally arranged cylinders 10, 10 as a rotary drive mechanism for rotating the molding sand compression mechanism 9 clockwise and counterclockwise;

By the elongation of the two cylinders 10, 10, the molding sand blowing mechanism blows molding sand from the molding sand blowing inlet to the above-mentioned mold-making upper box and mold-making lower box 2, 3 in a vertical state.

In the above-mentioned upper and lower sand box assembly 27, as shown in FIG. It is arranged in the protrusions 2a, 3a and can slide freely up and down, and the above-mentioned mold-making lower box 3 can be vertically installed on the mold-making upper box 2 through the above-mentioned connecting rods 18, 18, or can be lowered to the mold-making upper box 2. separated by a certain distance.

And the above-mentioned connecting rods 18, 18 are respectively engraved with grooves on the upper and lower parts thereof, which can fit with the claws 30 described below on the above-mentioned clamping mechanisms 28, 28.

And as shown in Figure 3, the above-mentioned clamping mechanism 28 is installed on the front and rear outer sides of the upper lifting bracket 14, and the clamping mechanism 28 includes a pair of swing hydraulic cylinders 29, 29, and embedded in the pair of swing hydraulic cylinders. The claw 30 on each rocking shaft of hydraulic cylinder 29,29. Through the action of the above-mentioned pair of rocking hydraulic cylinders 29, 29, the above-mentioned pair of claws 30, 30 enter the grooves on the upper parts of the connecting rods 18, 18 of the above-mentioned upper and lower sand box assemblies 27, and the connecting rods 18, 18 can be The upper part is clamped.

And the above-mentioned clamping mechanism 28 is also installed on the front and rear outer surfaces of the lower lifting bracket 15 described below, which enters the grooves at the bottom of the above-mentioned connecting rods 18, 18 and clamps the bottom of the connecting rods 18, 18. .

And in the above-mentioned molding sand compression mechanism 9, as shown in Figure 1 and Figure 2, the center position of the above-mentioned rotating frame 12 is set close to the above-mentioned support shaft 8, and is set to be free to rotate along the clockwise and counterclockwise directions in the vertical plane On the right side of the rotating frame 12, a pair of guide rods 13, 13 extending in the up-down direction are arranged at regular intervals in the front-back direction. The lower part of the inverted L-shaped lower lifting bracket 15 arranged between the above-mentioned pair of guide rods 13, 13 can slide freely through the integrally provided clamp part. The upward telescoping action of the upward cylinder 16 and the downward cylinder 17 approaches and moves away from each other.

A plurality of cylinders 19, 19 for advancing and retreating the upper positive pressure plate 6 are provided on the upper lifting frame 14, and a plurality of cylinders 20, 20 for advancing and retreating the lower positive pressure plate 7 are provided on the lower lifting frame 15. Above-mentioned up and down lift support 14,15 horizontal upper surfaces are respectively the size that can push out the upper case of molding and the lower case of molding 2,3.

Upward cylinders 22, 22 are installed on the front and rear outer sides of the lower lifting bracket 15, and a frame-shaped frame surrounding the lower positive pressure plate 7 can be slidably provided between the upper ends of the piston rods of the plurality of cylinders 22, 22. Horizontal frame 21.

And, as shown in Figure 1 and Figure 2, the loading and unloading mechanism 4 of above-mentioned double-sided template 5 includes:

Surrounding the annular member 23 arranged on the above-mentioned support shaft 8 of the above-mentioned molding sand compression mechanism 9;

A cylinder 24 pivotally arranged on the rotating frame 12 of the above-mentioned molding sand blowing mechanism 11 and rotatably connecting the end of its piston rod to a part of the above-mentioned annular member 23;

A pair of cantilever arms 25, 25 with a base end fixed on the above-mentioned ring member 23 and a single-arm structure;

A suspension type trolley (not shown) that carries the above-mentioned double-sided formwork 5 for free reciprocating movement in the left-right direction.

Through the telescopic action of the above-mentioned cylinder 24, the above-mentioned pair of cantilever arms 25, 25 rotate up and down, and the above-mentioned trolley will move the above-mentioned double-sided template between the above-mentioned molding upper box and the molding lower box 2, 3 on the above-mentioned molding sand compression mechanism. 5 move in, move out.

The above-mentioned molding sand filling mechanism 11 is arranged at the left position in the sky part of the above-mentioned machine platform 1, and is composed of two sand loosening tanks (not shown in the figure), which are respectively supplied to the above-mentioned mold-making upper box and the mold-making mold independently by compressed air. Molding sand is blown into the under-mold boxes 2 and 3. The pressure of the compressed air is preferably 0.05Mpa-0.18Mpa.

The above-mentioned pine sand tanks can not only act independently respectively but also can act simultaneously through unified control.

Number 26 among the figure is the casting mold push-out device that the upper and lower casting molds on the above-mentioned lower positive pressure plate 7 that are extracted in the above-mentioned mold-making upper box and the mold-making lower box 2,3 are released from the mold receiving platform.

Figures 9-14 show the upper and lower casting mold molding devices without sand boxes using the upper and lower compression feet as the upper and lower compression devices.

The difference between the molding device for molding the upper and lower molds without a flask, which uses the upper and lower compression feet as the upper and lower compression devices, and the molding device without a flask, which uses the upper and lower positive pressure plates as the upper and lower compression devices, is that the mold-making upper box and the mold-making lower box 2 , 3, the upper and lower compression pins 6a, 6a, 7a, 7a of the upper and lower positive pressure plates 6, 7 of the upper and lower positive pressure plates 6, 7 that can be replaced respectively in and out of the opening of the double-sided template 5 in 3.

As shown in Figure 10, the upper lifting bracket 14 is provided with a plurality of cylinders 19, 19 for advancing and retreating the upper compression device 6', and the lower lifting bracket 15 is provided with a plurality of cylinders 20, 20 for advancing and retreating the lower compression device 7'. And there is another difference in that the above-mentioned plurality of compression feet 6a, 6a advances and retreats respectively through the telescopic movement of the plurality of cylinders 6b, 6b, and the above-mentioned plurality of lower compression feet 7a, 7a advances and retreats respectively through the telescopic movement of the plurality of cylinders 7b, 7b. .

Another difference is that the upper ends of the piston rods of the plurality of cylinders 22, 22 are slidably provided with a frame-shaped horizontal frame 21 surrounding the lower compression feet 7a, 7a group.

The horizontal upper surfaces of the above-mentioned upper and lower lifting supports 14, 15 are the same as the upper and lower casting molding devices without sand boxes using the upper and lower positive pressure plates as the upper and lower compression devices. size.

The difference between the molding device for molding the upper and lower molds without a flask using the compression feet as the upper and lower compression devices and the molding device for molding the molds without a flask using the upper and lower positive pressure plates as the upper and lower compression devices has been explained. The rest of the construction of the device is the same.

Next, starting from the state shown in FIG. 1, the method of molding the upper and lower molds without the flask using the positive pressure plate as the compression device without the flask will be described.

First, as shown in Fig. 4-a, the cylinder of the moving-in mechanism 4 is extended, and the double-sided formwork 5 is moved into the upper and lower mold-making upper box 2 and the lower mold-making box of the upper and lower sand box assembly 27 through a pair of cantilever arms 25 and 25. After entering the box 3, with the help of the telescopic action of the cylinder 16, the mold-making upper box 2 moves up and down in a short distance through the upper lifting bracket 14, and the cantilever 25 rotates clockwise through the contraction action of the cylinder 24 of the loading and unloading mechanism 4. When the connection state between the boom 25 and the trolley is released, the boom 25 returns to its original state.

As shown in Figure 4-b, the upward cylinder 16 and the downward cylinder 17 of the molding sand compression mechanism 9 shrink, and the upper and lower mold boxes 2 and 3 are brought closer to each other through the up and down lifting brackets 14 and 15, and the mold upper Box and molding lower box 2,3 clamps the double-sided template 5, then as shown in Figure 5-a, a pair of clamping mechanisms 28,28 at the bottom will connect the connecting rods 18,18 of the upper and lower sand box assembly 27 The lower part is clamped.

As shown in Figure 5-b, the plurality of cylinders 19, 19, 20, and 20 of the molding sand compression mechanism 9 are elongated by a certain length, and the upper positive pressure plate 6 and the lower positive pressure plate 7 respectively extend into the mold upper box and the mold mold. A certain length in the under-mold box 2 and 3 forms two molding spaces up and down.

As shown in Figure 6-a, the cylinder 10 is extended, the molding sand compression mechanism 9 rotates clockwise around the support shaft 8, and the mold-making upper box and the mold-making lower box 2, 3 are perpendicular to the double-sided template 5 Simultaneously, the molding sand blowing inlet moves upwards, so that the lower ends of the two loose sand tanks of the molding sand blowing mechanism 11 are connected with the molding sand blowing inlet respectively.

At this time, when the upper and lower molding spaces are formed, the cylinder 10 is elongated, and the molding sand compression mechanism 9 can rotate clockwise around the support shaft 8. After the upper and lower molding spaces are formed, the cylinder 10 is elongated, and the molding sand compression mechanism 9 may rotate clockwise around the support shaft 8.

Then the molding sand blowing mechanism 11 blows molding sand into the upper and lower molding spaces from the molding sand blowing inlet to fill it, and then the plurality of cylinders 19, 19 extend respectively, and the upper and lower positive pressure plates 6, 7 further enter the upper and lower molding spaces, and compress the molding sand .

When compressing the molding sand in the upper and lower molding spaces, the reverse force of the cylinders 19, 19, 20, 20 acts on the upper and lower lifting brackets 14, 15 by the upper and lower clamping mechanisms 28, 28 and connecting rods 18, 18.

As shown in Figure 6-b, the mold upper box and the mold lower box 2, 3 and the double-sided template 5 return to the horizontal state through the contraction action of the cylinder 10. In this case, the compression process and the process of returning to the horizontal plane can be carried out simultaneously, or either one can be carried out first.

It is also possible to divide the process of filling and compressing the molding sand into the following two stages. The molding sand blowing mechanism 11 blows molding sand into the upper and lower molding spaces from the molding sand blowing inlet for filling, and then a pair of molding upper box and molding lower box When 2, 3 and the double-sided formwork 5 are restored to the horizontal state, a plurality of cylinders 19, 19, 20, 20 are respectively contracted by a certain distance, and the upper and lower positive pressure plates 6, 7 are returned to a pair of mold-making upper box and mold-making lower box respectively. near the opening of the box.

Then through the molding sand blowing mechanism 11, the molding sand is blown into the upper and lower molding spaces from the molding sand blowing inlet again to fill them up, and a pair of molding upper box and molding lower box 2, 3 and double-sided template 5 are restored to the horizontal state. , a plurality of cylinders 19, 19, 20, 20 are elongated respectively, and the upper and lower positive pressure plates 6, 7 enter the mold making upper box and the mold making lower box, and the molding sand in the upper and lower two molding spaces is compressed.

In the molding sand filling and compression process described here, although the above-mentioned upper and lower positive pressure plates 6, 7 are inserted into the above-mentioned pair of molding upper boxes and molding lower boxes 2, 3, molding sand is blown into the upper and lower molding spaces formed Afterwards, the above-mentioned upper and lower positive pressure plates 6,7 of the above-mentioned molding sand blowing inlet side move back a certain stroke. The above-mentioned upper and lower positive pressure plates 6, 7 are respectively inserted into a pair of mold-making upper box and mold-making lower box 2, 3, and molding sand is blown into the upper and lower molding spaces formed, and the upper and lower positive pressure plates 6, 7 are moved back. A certain itinerary is also possible.

As described above, by filling the upper and lower molding spaces with molding sand in two stages, the hardness of the mold near the openings in the pair of upper and lower molding boxes 2 and 3 is increased.

Then, the clamping state of the lower clamping mechanism 28, 28 and the connecting rod 18, 18 is released, as shown in Fig. While the mold making upper box 2 rises, the mold making lower box 3 descends, and the mold making upper box and the mold making lower box 2,3 of the casting mold of molding sand compression molding are separated from the double-sided template 5 in the inside. The molding lower box 3 is suspended by connecting rods 18,18.

As shown in Figure 7-b, after the cylinder 24 shrinks, the cantilever 25, 25 moves out the double-sided template 5 from the mold-making upper box and the mold-making lower box 2, 3, as shown in Figure 8-a, if necessary, mold After the core is installed inside, the upward and downward cylinders 16 and 17 shrink, and the upper mold-making box 2 is lowered through the upper and lower lifting brackets 14 and 15, while the mold-making lower box 3 is raised, and the mold-making upper box with the mold inside 2 coincides with molding lower case 3.

As shown in Figure 8-b, the plurality of cylinders 19, 19 of the molding sand compression mechanism 9 are stretched, and the plurality of cylinders 20, 20 of the molding sand compression mechanism 9 are contracted. When the upper and lower positive pressure plates 6, 7 descend, the upward and downward movement Cylinders 16 and 17 are elongated, and while the mold-making upper box 2 rises, after the mold-making lower box 3 descends, the mold-making lower box 3 is suspended by the connecting rods 18 and 18, and the mold M is lifted from the mold-making upper box and the mold-making lower box. Extracted in the case 2,3, the mold M up and down is pushed out of the machine outside from the lower positive pressure plate 7 by the push-out device 26.

Next, starting from the state shown in FIG. 9, the method of performing upper and lower mold molding by the flaskless mold molding device using the compression foot as the compression device will be described.

First, the cylinder 24 of the carrying-in mechanism 4 is extended, and a pair of cantilever arms 25 and 25 move the double-sided formwork 5 into the horizontal state of the upper and lower sand box assembly 27. Between the mold upper box 2 and the mold lower box 3, the cylinder 16 Telescopic, the upper lifting bracket 14 makes the molding upper box 2 move up and down in a short distance, and at the same time, the contraction of the cylinder 24 of the loading and unloading mechanism 4 makes the cantilever 25 move clockwise, and the connection state between the cantilever 25 and the trolley is released Cantilever 25 returns to original state simultaneously.

The upward cylinder 16 and the downward cylinder 17 of the molding sand compression mechanism 9 shrink, and the up and down lifting brackets 14, 15 make the upper mold making box and the mold making lower box 2, 3 close to each other, and the mold making upper box and the mold making lower box 2, 3 Clamp the double-sided template 5, and a pair of clamping mechanisms 28, 28 at the bottom clamp the lower parts of the connecting rods 18, 18 of the upper and lower sand box assemblies 27.

The cylinder 10 is extended, and the molding sand compression mechanism 9 rotates clockwise around the support shaft 8, and the molding sand blowing inlets of the molding upper box and the molding lower box 2, 3 move upward, and the molding sand blowing mechanism 11 The two molding sand injection outlets are respectively connected to the molding sand blowing inlet (refer to Fig. 12-a).

During the clockwise rotation of the molding sand compression mechanism 19, the plurality of cylinders 19, 19, 20, and 20 on the molding sand compression mechanism elongate to a certain length respectively, serving as the plurality of compression legs 6a, 6a, 6a, 7a, 7a are respectively inserted into the mold-making upper box and the mold-making lower box 2, 3 to a certain length to form two molding spaces up and down.

At this time, when the upper and lower molding spaces are formed, the cylinder 10 is elongated, and the molding sand compression mechanism 9 can rotate clockwise around the support shaft 8. After the upper and lower molding spaces are formed, the cylinder 10 is elongated, and the molding sand compression mechanism 9 Clockwise rotation around the support shaft 8 is also possible.

A plurality of compression feet 6a, 6a, 7a, 7a as the upper and lower compression devices 6', 7' are respectively stretched to a certain length, and the template part of the double-sided template and the plurality of upper and lower compression feet 6a, 6a, 7a, 7a The interval between is set to make the ratio of the molding sand before compression and after compression infinitely close.

That is to say, as shown in Figure 12-b, before the molding sand is compressed, if the distance between the formwork part of the double-sided formwork 5 and the plurality of upper and lower compression feet 6a, 6a, 7a, and 7a opposite to it is A and B, as As shown in Figure 12-c, if the intervals are a and b after the molding sand is compressed, their ratios a/A and b/B are infinitely close to the relationship of a/A=b/B.

In other words, on the higher part of the formwork part, the upper and lower compression feet 6a, 6a, 7a, 7a protrude and compress a smaller amount of molding sand, and on the lower part of the formwork part, the upper and lower compression feet 6a, 6a, 7a, 7a The amount of molding sand that protrudes and compresses is more.

Through the molding sand blowing mechanism 11, the molding sand is blown into the upper and lower molding spaces from the molding sand blowing inlets of the molding upper box and the molding lower box 2, 3 to fill, and then a plurality of cylinders 19, 19, 20, 20 are extended respectively, and the plurality of The upper and lower compression feet 6a, 6a, 7a, 7a further enter the upper and lower molding spaces to compress the molding sand in the upper and lower molding spaces.

A plurality of cylinders 6b, 6b, 7b, 7b contract respectively to make a plurality of up and down compression feet 6a, 6a, 7a, 7a retreat, a plurality of cylinders 19, 19, 20, 20 extend respectively, a plurality of up and down compression feet 6a, 6a , 7a, 7a enter the molding upper box and the molding lower box.

The densities of the upper and lower casting molds after molding are roughly uniform, and the sides of the upper and lower casting molds near the upper and lower compression devices, that is, the upper and lower compression feet 6a, 6a, 7a, 7a, are roughly flat (see Figure 12-a).

When the molding sand in the upper and lower molding spaces was compressed, the reverse forces of 19, 19, 20, 20 acted on the upper and lower lifting brackets 14, 15 through the upper and lower clamping mechanisms 28, 28 and connecting rods 18, 18.

Cylinder 10 shrinks, and when molding upper box 2, molding lower box 3 and double-sided template 5 return to the horizontal state, the clamping state of lower clamping mechanism 28, 28 and connecting rod 18, 18 is released, upward and downward The lower cylinders 16, 17 are elongated, and the up and down lifting brackets 14, 15 make the mold-making upper box 2 rise while the mold-making lower box 3 descends, and the mold-making upper box and the mold-making lower box 2 and the mold-making lower box 2, which have molding sand compressed into molds inside, 3 are separated from the double-sided template 5 respectively. Molding lower case 3 is suspended on connecting rods 18,18.

The cylinder 24 shrinks, and the cantilever 25 moves the double-sided template 5 out from between the mold upper box and the mold lower box 2, 3. If necessary, after the core is set in the mold, the upward and downward cylinders 16, 17 shrink, Lifting support 14,15 up and down make the lower case 3 of mold making rise when the upper case 2 of the mold making descends, and the upper case 2 of the mold making and the lower case 3 of the mold making are overlapped in the mold making.

The plurality of cylinders 19, 19 of the molding sand compression mechanism 9 extend, the plurality of cylinders 20, 20 of the molding sand compression mechanism 9 contract, and when the plurality of upper and lower compression feet 6a, 6a, 7a, 7a descend, the upward and downward cylinders 16 , 17 are elongated, after the mold-making upper box 2 rises and the mold-making lower box 3 descends, the mold-making lower box 3 is suspended by connecting rods 18, 18, and is pulled out from the mold-making upper box and the mold-making lower box 2, 3 The upper and lower casting molds M are released, and the upper and lower casting molds M are pushed out of the machine from the plurality of lower compression feet 7a, 7a through the ejection device 26.

In the above-mentioned preferred embodiment, before the molding sand is compressed, the distance between the template part of the double-sided template and the plurality of upper and lower compression feet 6a, 6a, 7a, 7a opposite to it is A, B, as shown in Figure 12- As shown in c, if the interval is a and b after the molding sand is compressed, their ratios a/A and b/B should be infinitely close to the relationship of a/A=b/B, so the density of the upper and lower molds after molding is roughly uniform , the side of the upper and lower molds close to the upper and lower compression devices, that is, the upper and lower compression feet 6a, 6a, 7a, 7a, is substantially flat. But it is not limited to this case. As shown in Figures 13-a to 13-b, the template part of the double-sided template 5 and the corresponding upper and lower compression devices 6', 7' between the plurality of upper and lower compression feet 6a, 6a, 7a, 7a After the space is set to a state where the molding sand is easy to flow, it is also possible to blow molding sand into the molding space from the molding sand blowing inlet to the upper and lower molding spaces for molding.

When the space between the template part of the double-sided template 5 and the plurality of upper and lower compression feet 6a, 6a, 7a, 7a is set in a state where the molding sand is easy to flow, the nozzle part (especially the necking part of the nozzle), etc. It is also possible to eject air from the part with poor fluidity of the molding sand to reduce the frictional resistance between the molding sand and the side wall.

As shown in Figures 14-a to 14-f, in the double-sided template 5, the upper and lower boxes 2, 3 and the upper and lower compression devices 6', 7', the upper and lower compression feet 6a, 6a, 7a, 7a After the upper and lower molding spaces in the vertical state are divided, molding sand is blown into the upper and lower molding spaces from the mold-making upper box and the mold-making lower box 2, 3, and the plurality of cylinders 6b, 6b, 7b, 7b are stretched respectively, and the plurality of cylinders are compressed up and down. Feet 6a, 6a, 7a, 7a respectively enter the molding upper box and the molding lower box, and compress the molding sand in the upper and lower molding spaces.

A plurality of cylinders 6b, 6b, 7b, 7b retreat, blow molding sand into the upper and lower molding spaces from the molding sand blowing inlet again, and the compression planes of the plurality of upper and lower compression feet 6a, 6a, 7a, 7a reach the state of being flush, Cylinders 19, 19, 20, 20 are extended respectively, and the upper and lower compression feet 6a, 6a, 7a, 7a enter into the upper box and the lower box of mold making together, further compressing the molding sand in the molding space up and down.

A structure in which some of the plurality of up and down compression legs 6a, 6a, 7a, 7a are integrated into one body is also possible.

Claims (11)

1. A molding method of an upper and lower casting mold without a sand box that overlaps, is characterized in that it comprises: (1) The process of inserting and clamping a double-sided formwork into a pair of mold-making upper box and mold-making lower box that are respectively provided with molding sand blowing inlets on the side walls and are in a horizontal state; (2) The process of inserting the upper and lower compression devices located on the opening side of the above pair of mold-making upper box and mold-making lower box without double-sided templates into the above-mentioned pair of mold-making upper box and mold-making lower box to form two upper and lower molding spaces ; (3) Rotate the above-mentioned pair of mold-making upper box, mold-making lower box and double-sided template to a vertical state, and move the above-mentioned pair of mold-making upper box, mold-making lower box and double-sided template to make the above-mentioned molding sand blowing inlet upward the process of moving; (4) The process of blowing molding sand into the upper and lower molding spaces from the above-mentioned molding sand blowing inlet for filling; (5) The above-mentioned upper and lower compression devices further enter the upper and lower molding spaces to compress the molding sand; (6) The above-mentioned pair of mold-making upper box and mold-making lower box and the process of returning to the horizontal state with the double-sided template; (7) After the above-mentioned pair of mold-making upper boxes and mold-making lower boxes with casting molds inside are separated from the above-mentioned double-sided formwork, the double-sided formwork is moved out from the middle of the above-mentioned pair of mold-making upper boxes and mold-making lower boxes; (8) If necessary, after the core is set in the cast mold after molding, the process of overlapping the pair of mold-making upper box and mold-making lower box with the mold inside; (9) The process of pulling out the above-mentioned casting mold after the pair of mold-making upper box and mold-making lower box with the above-mentioned casting mold are overlapped. 2. The molding method of the upper and lower casting molds without sand box according to claim 1, characterized in that, the upper and lower compression devices positioned at the opening side of the above-mentioned pair of mold-making upper box and mold-making lower box without double-sided templates are inserted into the above-mentioned A pair of mold-making upper box and mold-making lower box, the process of forming two upper and lower modeling spaces (2), with the above-mentioned pair of mold-making upper box, mold-making lower box and double-sided template rotating to a vertical state, and moving the above-mentioned one The process (3) of moving the above-mentioned molding sand blowing inlet upwards is carried out simultaneously for the mold-making upper box, the mold-making lower box and the double-sided formwork. 3. The molding method of the upper and lower casting molds without flasks according to claim 1, characterized in that, the above-mentioned upper and lower compression devices further enter the upper and lower molding spaces to compress the molding sand, and the above-mentioned pair of mold-making upper boxes and The process of molding the lower box and double-sided formwork back to the horizontal state is carried out simultaneously. 4. The molding method of the upper and lower casting molds without a flask according to claim 1, wherein the upper and lower compression devices are upper and lower positive pressure plates. 5. The molding method of the upper and lower casting molds without a flask according to claim 1, wherein the above-mentioned upper and lower compression devices are a plurality of upper and lower compression feet. 6. The molding method of the upper and lower casting molds without a flask according to claim 4, characterized in that, after the molding sand is blown into the upper and lower molding spaces from the above-mentioned molding sand blowing inlet for filling, the following two steps are added: (a) Steps in which the above-mentioned upper and lower positive pressure plates retreat for a certain stroke; (b) A step of blowing molding sand into the upper and lower molding spaces from the molding sand blowing inlet for filling. 7. The molding method of the upper and lower casting molds without a flask according to claim 6, characterized in that the step (a) of retreating the upper and lower positive pressure plates by a certain stroke is the same as the two molding spaces up and down from the above-mentioned molding sand blowing inlet. The step (b) of filling with molding sand by internal blowing is carried out simultaneously. 8. The molding method of the upper and lower casting molds without sand box according to claim 5, characterized in that the upper and lower compression devices positioned at the opening side of the above-mentioned pair of mold-making upper box and mold-making lower box without double-sided templates are inserted into the above-mentioned A pair of mold-making upper box and mold-making lower box, the process of forming two upper and lower molding spaces (2) includes setting the distance between the template part of the double-sided template and the upper and lower compression feet so that they can be compressed before and after compression of the molding sand. Steps with the same proportion of each interval. 9. The molding method of the upper and lower casting molds without sand box according to claim 5, characterized in that, the upper and lower compression devices positioned at the opening side of the above-mentioned pair of mold-making upper box and mold-making lower box without double-sided templates are inserted into the above-mentioned A pair of mold-making upper box and mold-making lower box, the process of forming two upper and lower molding spaces (2) includes setting the molding space formed by the template part of the above-mentioned double-sided template and each upper and lower compression feet so that the molding sand is in the molding space Easy flowing steps. 10. The molding method of the upper and lower casting molds without a sand box according to claim 9, characterized in that, the above-mentioned molding space formed by the template part of the above-mentioned double-sided template and each upper and lower compression foot is set so that the molding sand is easy to mold in the molding space. The step of flowing includes spraying air at the nozzle part of the loose sand tank and the part with poor fluidity of the molding sand, and reducing the frictional resistance between the molding sand and the side wall of the sand loosening tank. 11. The molding method of the upper and lower casting molds without a flask according to claim 5, characterized in that, the process (4) of blowing molding sand into the upper and lower molding spaces from the above-mentioned molding sand blowing inlet for filling and the above-mentioned upper and lower compression devices In the process (5) of further entering the upper and lower molding spaces to compress the molding sand, it also includes: (a) The first filling step of blowing molding sand into the upper and lower molding spaces formed by the above-mentioned molding sand blowing inlet into the vertical state of the above-mentioned double-sided template, the upper and lower molding boxes and the upper and lower compression devices; (b) a first compression step in which the plurality of upper and lower compression legs in the above-mentioned up-and-down compression device respectively enter the above-mentioned upper and lower molding spaces to compress the molding sand; (c) The second filling step of blowing molding sand into the upper and lower molding spaces from the above-mentioned molding sand blowing inlet after the plurality of upper and lower compression legs in the above-mentioned up-and-down compression device are retreated; (d) The compression planes of the above-mentioned plurality of upper and lower compression feet are in a flush state, and the plurality of upper and lower compression feet enter the above-mentioned upper and lower molding spaces together to compress the molding sand in the second compression step.

Images