KR20220169585A - Shell core automatic production system - Google Patents

Abstract

According to the present invention, a shell core automatic production system includes: a mold assembly in which a pair of molds face each other and are disposed to adjust a distance therebetween; an angle adjustment unit which adjusts an arrangement angle for a movable mold of the pair of molds forming the mold assembly; a core sand supply unit which supplies a core for casting in a state that the pair of molds are combined; and a torch unit which performs firing on an area into which core sand is inserted on the pair of molds. The mold assembly includes the pair of molds having the movable mold and a fixed mold, a mold bracket coupled to each of the pair of molds, and a fireball grill mounted to the mold bracket and molds a coupling hole into a long hole with a function of binding a mold to the mold bracket to be attachable to molds with various sizes.

Description

Shell core automatic production system {Shell core automatic production system}

In the present invention, in order to expand the range of molds and crater plates fastened in the process of producing core yarn, the fastening holes of brackets fastened with molds are processed horizontally to lengthen to reduce the work that needs to be attached and detached, and more diverse sizes without the need to replace brackets. It relates to a method for easily attaching a mold and a crater plate.

In general, molds used for casting include sand molds made by compacting molding sand, molds made by carving on metals such as steel, and synthetic resin particles that become hard when heated and mixed with sand before heating. A shell mold, etc., which is dropped on a metal model and solidified to form a thin shell-shaped mold, is used. Methods for introducing molten metal include gravity casting using gravity, die casting in which molten metal is pressurized and pushed into a mold, centrifugal casting in which molten metal is sent to every corner of a mold using centrifugal force, and a small amount of gunpowder is placed thereto. Explosion casting, in which molten iron is pushed by the pressure of the explosion, the mold is directed downward, and a part of it is placed on the surface of the molten iron, and the surface of the molten iron is pressurized with gas to put molten iron into the mold, while simultaneously exhausting the molten iron from the bottom of the mold. There is an injection molding method that raises and so on.

In general, cores for casting are manufactured using phenolic resin-coated sand in which sand particles are coated with phenolic resin so that when heat is applied, the sand particles have adhesive strength so that they can be molded into a specific shape. The working process of manufacturing the core for casting is performed in a core molding machine for casting. The core molding machine for casting consists of a preheating furnace, a sand dumping unit, a heating furnace, and a core take-out unit for casting, and the work is continuously circulated. .

In the preheating furnace, a mold having a casting shape assembled on a bogie is first heated and preheated. The mold preheated in the preheating furnace moves to the sand dumping unit, and phenolic resin coating sand having thermosetting property is poured into the heated mold. . In the sand dumping unit, coating sand is applied to the surface of the preheated mold so that the phenolic resin coated on the outer surface of the sand has adhesiveness due to the heat of the preheated mold, thereby forming a core for casting in the mold.

The heating furnace heats and sinters the outer shape of the casting core formed in the mold. The casting core fired and molded in the heating furnace moves to the casting core take-out unit and is separated and taken out. In the process of taking out the core for casting, the existing semi-automatic type of equipment adopts a method in which the operator puts his/her hand into the machine to take out the core at the same time as the mold is opened. However, it can be directly exposed to harmful gases such as curing agents and additives generated during the production of cores.

Basically, all processes until one core product is produced include closing the mold → filling the core yarn into the mold → firing the injected core yarn → machining the core yarn injection part on the mold with a torch → opening the mold → dropping the product → carrying it out of the machine, etc. controlled automatically.

On the other hand, it is necessary to fasten a different mold every time a product is changed on a machine that produces semi-automatic and automatic casting cores. Since the molds have different sizes and widths, producing various products in limited facilities is not profitable. It helps a lot to improve. Existing products have a problem in that there is the hassle of dismantling and moving the bracket bolts according to the width of the mold, and replacing them when necessary due to the weight of the mold that is not light puts strain on workers and productivity.

Republic of Korea Patent Registration No. 10-1841109 "Method for manufacturing a casting using a mold" (2017.05.29.)

An object of the present invention is to solve the above problems,

In order to widen the range of molds fastened during the heating process, the fastening hole of the bracket is processed horizontally to lengthen the work that needs to be removed and removed, and technical features that make it easy to attach molds of more diverse sizes without the need to replace the bracket is to provide

In addition, the present invention is a task that is not easy to fasten after disassembling the bolts and replacing the crater plate in terms of the location of the crater plate, which has a firing function for the core sand injected into the mold. By changing the processing of the bolt fastening work process, it is simply fixed with a pin to provide technical features that increase productivity by reducing working time.

An automatic shell core production facility according to the present invention for achieving the above object includes a mold assembly 100 in which a pair of molds face each other and are disposed to adjust the distance; an angle adjusting unit 200 for adjusting a disposition angle of a movable mold among a pair of molds constituting the mold assembly 100; a core yarn supply unit 300 functioning to supply cores for casting in a state where the pair of molds are molded; And a torch unit 400 for firing on the region where the core yarn is injected on the pair of molds;

The mold assembly 100 includes a pair of molds having a movable mold and a fixed mold, mold brackets respectively coupled to the pair of molds, and a crater plate mounted in the mold bracket, and binding the molds to the mold bracket. It is possible to attach molds of various sizes by molding the mold coupling hole that functions as a long hole.

The mold assembly 100 includes a movable mold module 110 including a movable mold 111 and a movable mold bracket 112 coupled to the movable mold, a fixed mold 121 corresponding to the movable mold, and a fixed mold. The fixed mold module 120 including the coupled fixed mold bracket 122, the mold shaft 130 passing through the movable mold module 110 and the fixed mold module 120, and the mold shaft 130 It includes a mold transport motor 140 that enables the movable mold to be transported along the mold axis in a state disposed at one end.

The angle adjusting unit 200 includes an angle adjusting motor unit 220 rotatably coupled to a mounting bracket 230 movably disposed along the mold axis 130 and an axial direction of the angle adjusting motor unit. In the state including the angle adjusting rod 210 coupled to be elastic along the way, the angle adjusting rod 210 is coupled to the movable mold bracket 112 coupled to the movable mold 111, and the movable mold bracket ( 112) has a rotatable state on the mounting bracket 230.

According to the present invention, all of the objects of the present invention described above can be achieved.

The present invention reduces the work of attaching and detaching the brackets according to the mold by processing the fastening hole of the bracket horizontally to expand the range of molds to be fastened, and makes it possible to easily attach molds of various sizes without the need to replace the brackets. do.

In addition, the present invention is a bolt fastening work process by changing the processing of the mill pin in contact with the crater plate in order to easily improve the process of disassembling the bolt and replacing the crater plate in the position of the crater plate, which has a firing function for the core sand injected into the mold. By simply fixing with a pin by reducing the work time, productivity increases.

1 is a front view of an automatic shell core production facility according to an embodiment of the present invention.
2 is a side view of an automatic shell core production facility according to an embodiment of the present invention.
3 is a top view of an automatic shell core production facility according to an embodiment of the present invention.
FIG. 4 is a view in which a movable mold constituting a mold assembly is rotated at 90 degrees using an angle adjusting unit to enable discharge of a finished core yarn product.
5 is a view showing an assembly relationship between a mold assembly, an angle adjusting unit, and a torch unit constituting an automatic shell core production facility according to the present invention.
6 is a view showing a process of automatically torching after sand input to sinter a core yarn supply groove, which is a core yarn input hole, using a torch unit.
Figure 7 shows that it is possible to assemble molds having various sizes by changing the mold coupling holes formed on both sides of the mold bracket to a long hole type extending to both sides.
Figure 8 shows a side view and a front view of the mold bracket.
9 illustrates the improvement of the crater plate coupled to the fixed mold, and shows a state in which the crater plate is simply fixed with a pin by changing the processing of the mill pin in contact with the crater plate to reduce the bolt fastening work process.
10 illustrates the improvement of the crater plate coupled to the movable mold, and shows a state in which the crater plate is simply fixed with a pin by changing the processing of the mill pin in contact with the crater plate to reduce the bolt fastening work process.

Hereinafter, the configuration and operation of an embodiment according to the present invention will be described in detail with reference to the drawings.

Referring to the drawings, an automatic shell core production facility according to an embodiment of the present invention includes a mold assembly 100 in which a pair of molds face each other so as to be able to adjust the distance; an angle adjusting unit 200 for adjusting a disposition angle of a movable mold among a pair of molds constituting the mold assembly 100; a core yarn supply unit 300 functioning to supply cores for casting in a state where the pair of molds are molded; a torch unit 400 for firing a region on which core yarn is injected on the pair of molds; and a conveyor device 500 enabling dropping and transporting of the sintered core yarn product within the pair of molds in a state disposed on the lower portion of the mold assembly 100 .

The mold assembly 100 includes a pair of molds having a movable mold 111 and a fixed mold 121, mold brackets 112 and 122 respectively coupled on the pair of molds, and a bracket plate to which the mold brackets 112 and 122 are coupled ( 113 and 123) and crater fire plates 114 and 124 mounted on the bracket plates 113 and 123. In the movable mold and the fixed mold, a core firing groove, which is a space for sintering the core for casting production by accommodating the input core yarn, is formed on the inner surface. In a state in which the movable mold and the fixed mold are mold-closed, a core yarn supply groove for supplying the core yarn is formed on the coupling surface of the upper end of the movable mold and the fixed mold. That is, in a state in which the movable mold 111 moves along the mold axis 130 toward the stationary mold 121, the mold is closed so that the inner surfaces of the movable mold and the stationary mold come into contact, and the core yarn supply unit 300 moves the mold and the movable mold. The core yarn is supplied to the core firing groove, which is the inner space of the movable mold and the fixed mold, through the core yarn supply groove formed at the top of the fixed mold.

The mold assembly 100 includes a movable mold module 110 including a movable mold 111 and a movable mold bracket 112 coupled to the movable mold, a fixed mold 121 corresponding to the movable mold and coupled to the fixed mold A fixed mold module 120 including a fixed mold bracket 122, a mold shaft 130 passing through the movable mold module 110 and the fixed mold module 120, and disposed at one end of the mold shaft 130 It includes a mold transfer motor 140 that enables the movable mold to be transferred along the mold axis in the state. Here, a pair of mold shafts 130 disposed side by side and spaced apart may be disposed through the movable mold module 110 and the fixed mold module 120 . That is, it enables stable movement of the movable mold module 110 through the pair of mold shafts 130.

In a state where the movable mold module 110 and the fixed mold module 120 are placed on the same mold axis 130, the movable mold module 110 is moved by using the mold transport motor 140 disposed on one end of the mold axis. By making it possible to transfer along the mold axis, it is possible to open and close the mold of the movable mold in the fixed mold.

The angle adjusting unit 200 adjusts the arrangement angle of the movable mold among the pair of molds. The angle adjusting unit 200 is fixed in a state enabling rotation of the movable mold bracket 112 coupled to the movable mold. Specifically, the angle adjusting motor unit 220 rotatably coupled to the mounting bracket 230 movably disposed along the mold shaft 130, and the angle adjusting motor unit are coupled to the angle adjusting motor unit to be flexible along the axial direction. In the state including the angle adjusting rod 210, the angle adjusting rod 210 is coupled to the mold bracket 112 coupled to the movable mold 111. The mold bracket 112 coupled to the movable mold has a rotatable state on the mounting bracket 230.

The angle adjusting unit 200 can change the arrangement angle of the movable mold by actuating in a state where the front end of the angle adjusting rod 210 is connected to the movable mold bracket 112 constituting the movable mold module 110 let it

Specifically, after the movable mold 111 is maintained vertically during the process of injecting and sintering the core yarn through the pair of molds 111 and 121, and then separating the sintered core yarn after the firing process, the movable mold 111 ) It functions to adjust the angle so that the inner molding groove of the movable mold 111 faces the lower side through the process of pushing the upper side of the mold bracket 112 coupled to the angle adjusting rod 210. That is, during the firing process, with the core firing grooves of the movable mold and the fixed mold facing each other, the core yarn is supplied and fired, and then the movable mold is rotated 90 degrees to adjust the position in the horizontal direction, thereby forming the plastically processed core. It enables the bottom free fall of the four products.

When the movable mold bracket 112 coupled to the movable mold is pushed through the angle control motor unit 220 and the angle control rod 210, the movable mold bracket 112 adjusts the angle, which is the point of engagement with the mounting bracket 230. It rotates 90 times counterclockwise around the axis 240.

When the automation equipment is installed, the mold is opened through the separation of the movable mold and the fixed mold, and the movable mold is rotated 90 degrees in a counterclockwise direction at the same time, and the conveyor device in which the fired core yarn is placed at the bottom of the pair of molds ( 500) automatically fall to the top and be taken out of the aircraft. In other words, even if the worker is not resident next to the machine, it is expected that it will lead to a great increase in productivity as well as an improvement in the working environment by repeating automatic dropping and taking out when the time comes.

The core yarn supply unit 300 functions to supply a core for casting in a state in which a pair of molds are molded.

In the core sand supply unit 300, a plurality of sand bins for storing sand having different core particle sizes are installed, and a plurality of hoppers having a screw sand supply function are formed below each sand bin, and a mold assembly ( 100) to supply core yarn. By attaching a level switch on the hopper, automatic quantitative supply of core sand is carried out. Through this, workers can continuously supply raw materials through the hopper without having to climb directly on a high machine device.

The torch part 400 is rotatably coupled on the torch coupling part 132 coupled to the end of the mold shaft 130 to the outside of the fixed mold module 120, and firing for the upper region of the mold into which the core yarn is inserted. proceed with That is, through the process of transferring strong heat to the core yarn supplying groove formed on the upper joint surfaces of the movable mold and the fixed mold, the quality of the core yarn product being fired is improved.

After the process of closing the mold between the movable mold and the fixed mold and supplying the core yarn, the torch unit 400 performs a sintering operation on the core yarn supplied to the core firing groove through the crater plate constituting the mold assembly 100. At the same time, the core yarn supply groove is heated.

The entire process leading to the production of core yarn products is automatically controlled: mold closing → filling of core yarn → firing of core yarn → heating with a torch at the core yarn supply groove at the top of the mold → opening the mold → dropping core yarn products → taking out of core yarn products from outside the machine.

As described above, the torch unit 400 is a core sand inlet and is a device that automatically torches after sand input to sinter the core sand supply groove formed at the top of the movable mold and the fixed mold. When the torch unit 400 is not operating, a small amount of gas is maintained, and since the torch unit 400 operates only when the mold is closed and the core sand is filled, energy saving is possible. The torch unit 400 has the effect of reducing the work that needs to be done when filling the core sand each time, giving a great effect on increasing productivity.

On the other hand, temperature is one of the most important factors to produce high quality of various cores. This facility is equipped with an automatic temperature control device to maintain the appropriate temperature for each product. That is, by attaching a temperature controller, a set temperature can be maintained regardless of a heat source such as gas or heater, thereby contributing to energy saving and quality improvement.

7 shows a state in which the mold bracket and the crater plate are combined on the bracket plate. Figure 8 shows a side view and a front view of the mold bracket.

In the process of coupling movable molds having various sizes to the movable mold bracket 112, the present invention makes it possible to easily attach and detach movable molds of various sizes without requiring replacement of the movable mold bracket.

The bracket plate 113 is coupled to the crater plate 114 on the central portion and to the movable mold bracket 112 on both sides at the same time. It is shown that assembling molds having various sizes is possible by changing the mold coupling hole 1121 formed as a long hole in the movable mold bracket 112 to a long hole type extending to both sides.

That is, as shown in FIG. 7, by changing the mold coupling holes formed on both sides of the mold bracket to a long hole type extending to both sides, it is possible to assemble molds having various sizes.

On the other hand, the fixed mold bracket 122 enables the combination of the crater plate and the fixed mold in the same way as the movable mold bracket 112.

Referring to FIG. 9, improvements in the crater plate coupled to the movable mold module will be described.

Prepare a fire plate fixing bushing 1142 and a fire plate fixing pin 1143 between the crater plate 114 and the plate fixing plate 1141 disposed on the central portion of the bracket plate 113 constituting the movable mold module 110. A nut 1144, a washer 1145, and an eject extension plate 1146 are disposed on the opposite side of the crater plate 114 and the plate fixing pin 1143 based on the plate fixing plate 1141. For the crater plate 114, hole processing is performed without tap processing as before. The plate fixing pin 1143 is tapped on both sides thereof.

To the outside of the movable mold bracket 112 along one side of the plate fixing plate 1141 into which the plate fixing bushing 1143 is inserted and coupled, the eject extension plate 1146 is coupled to the bolt 1147 through the nut 1144 and the washer 1145 ) While binding through, in a state in which the crater plate 114 and the plate fixing pin 1143 inserted into the crater plate are placed inside the bracket plate 113 along the other side of the plate fixing plate 1141, the The crater plate is bound by coupling the coupling bolt 1148 to the first tap hole formed at the outer end of the plate fixing pin. On the other hand, a coupling bolt 1148 is formed on the second tap hole formed at the inner end of the plate fixing pin 1143 passing through the plate fixing bushing 1142, the nut 1144, the washer 1145 and the eject extension plate 1146 It has a structure that is fastened.

Next, with reference to FIG. 10, improvements of the crater plate coupled to the fixed mold module will be described.

The second grill plate is fixed between the crater plate 115 disposed on the central portion of the bracket plate 123 constituting the fixed mold module 120 and the second grill plate fixing plate 1151 disposed on the outer side of the bracket plate 123. Prepare the bushing 1152. A nut 1153, a washer 1154, and a fixed side grill fixing pin 1155 are disposed on the opposite side of the second cooking zone grill 115 based on the second grill fixing plate 1151. For the second crater grill, hole processing is performed without tap processing as before.

Looking at the fixed side fire plate fixing pin 1155, it is coupled to the inside of the second fire plate fixing bushing 1152 inserted into the second fire plate fixing plate 1151 while passing through the washer 1154 and the nut 1153 . On the other hand, the coupling bolt 1156 is coupled to the tapped bolt coupler on the end of the fixed side grill fixing pin 1155 through a through hole formed on the second cooking zone grill plate 115.

Through the above configuration, only hole processing is performed without tap processing for the first and second crater plates, and the outer surface of the crater plate is broken by breaking away from the existing method of fixing the crater plate to the plate fixing pin in a tab method. It is possible to replace the crater plate through a simple operation of separating only the coupling bolt.

In the present invention, it is not easy to fasten after disassembling the bolts and replacing the crater plate in terms of the position of the crater plate, which has a firing function for the core sand injected into the mold. By changing the bolt fastening work process, it is simply fixed with a pin, resulting in increased productivity by reducing working time.

Existing semi-automatic and automatic machines require different molds to be tightened each time a product is changed. Since the molds have different sizes and widths, producing a variety of products in limited facilities is a great help in increasing sales.

Existing products have the inconvenience of dismantling and moving bracket bolts according to the width of the mold. Because it is not light in weight, replacing it when necessary puts strain on workers and productivity. In the present invention, in order to widen the fastening range of the mold, the fastening hole of the bracket is processed horizontally to be long, thereby reducing the work to be detached and making it possible to easily attach molds of various sizes without the need for replacement.

Although the present invention has been described through the above examples, the present invention is not limited thereto. The above embodiments may be modified or changed without departing from the spirit and scope of the present invention, and those skilled in the art will recognize that such modifications and changes also belong to the present invention.

100: mold assembly
110: movable mold module
111: movable mold
112: movable mold bracket
120: fixed mold module
121: fixed mold
122: fixed mold bracket
130: mold axis
140: mold transfer motor
200: angle adjusting unit
210: angle adjustment rod
220: angle control motor unit
230: mounting bracket
300: core yarn supply unit
400: Tochibu
500: conveyor device

Claims (3)

A mold assembly 100 in which a pair of molds face each other and are disposed to adjust a distance;
an angle adjusting unit 200 for adjusting a disposition angle of a movable mold among a pair of molds constituting the mold assembly 100;
a core yarn supply unit 300 functioning to supply cores for casting in a state where the pair of molds are molded; and
A torch unit 400 for firing a region in which the core yarn is injected on the pair of molds;
The mold assembly 100,
A pair of molds having a movable mold and a fixed mold, a mold bracket coupled to the pair of molds, and a crater plate mounted in the mold bracket,
An automatic shell core production facility that enables attachment of molds of various sizes by molding a mold coupling hole that functions to bind the mold to the mold bracket into a long hole.
According to claim 1,
The mold assembly 100,
A movable mold module 110 including a movable mold 111 and a movable mold bracket 112 coupled to the movable mold, a fixed mold 121 corresponding to the movable mold, and a fixed mold bracket 122 coupled to the fixed mold A fixed mold module 120 including a mold shaft 130 passing through the movable mold module 110 and the fixed mold module 120, and a movable mold disposed at one end of the mold shaft 130. Shell core automatic production equipment including a mold transfer motor 140 that enables transfer along the mold axis.
According to claim 2,
The angle adjusting unit 200 includes an angle adjusting motor unit 220 rotatably coupled to a mounting bracket 230 movably disposed along the mold axis 130 and an axial direction of the angle adjusting motor unit. In the state including the angle adjusting rod 210 coupled to be elastic along the way, the angle adjusting rod 210 is coupled to the movable mold bracket 112 coupled to the movable mold 111, and the movable mold bracket ( 112) has a rotatable state on the mounting bracket 230, shell core automatic production equipment.

Images