KR101737917B1 - Apparatus for center fugal casting - Google Patents

Abstract

The present invention relates to a centrifugal casting apparatus, and more particularly, to a centrifugal casting apparatus capable of performing work in a minimum space without being limited by installation space when molding various types of molded articles, So that a large amount of castings can be produced in a short time.
In order to accomplish the above object, the present invention is characterized in that it comprises a base, a guide part provided on the base, a rotating part provided on the base, and a flask mounted on the rotating part.

Description

Apparatus for center fugal casting

The present invention relates to a centrifugal casting apparatus, and more particularly, to a centrifugal casting apparatus capable of performing work in a minimum space without being limited by installation space when molding various types of molded articles, So that a large amount of castings can be produced in a short time.

In general, a centrifugal casting apparatus is a system in which a molten metal is injected and coagulated to rotate a mold at a high speed and uses the rotating centrifugal force to distribute the molten metal by a centrifugal force rotating at high speed in the mold, And because of the high pressure applied to the molten metal, the casting has a dense structure with no pores and is widely used.

However, in the conventional centrifugal casting apparatus, there are a method using the lever principle and a method using the air pressure.

First, when a lever is used, a lever is provided at a predetermined position around the rotary plate of the centrifugal casting apparatus, and a load is applied to the lever by using centrifugal force. Thus, pressing the rotary plate presses the mold placed between the upper and lower rotary plates As a result, the centrifugal casting device itself becomes large in size because it occupies a lot of work space because of the need to install levers, and safety accidents occur due to careless use.

Also, since the structure of the centrifugal casting apparatus is very complicated, it is difficult to press the mold properly due to the problem that the molding operation of the product is not accurately performed.

In addition, when pneumatic pressure is used, the casting is molded by pneumatic pressure. In addition, the construction is very complicated and requires a lot of manufacturing cost, and it takes a long time to perform the operation. .

On the other hand, the operator directly joins the upper and lower molds of the conventional centrifugal casting machine by hand, and after completion of the casting, the operator directly separates the upper molds in the same manner as the combination of the molds.

Therefore, there is a problem that a safety accident occurs during the operation because the upper mold is seated on the lower mold by manual operation.

In addition, when the casting completed from the lower casting mold is pulled out, the casting product remains firmly adhered to the lower casting mold, so that there is a problem in that it takes much difficulty to pull out the finished casting product.

In addition, in the process of injecting the molten metal into the mold, there is a problem that the molten metal is injected first to cause the temperature variation of the molten metal to be injected, so that the molten metal is not uniformly injected into the casting mold.

Korean Patent No. 10-1372299 Korean Patent No. 10-1083237 Korean Patent No. 10-0790533

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide an apparatus and a method for preventing the occurrence of safety accidents caused by the upper and lower molds being automatically raised and lowered The purpose is to make it possible.

The injection hopper for injecting the molten metal into the flask can be moved in the horizontal and vertical directions so that the position of the injection member can be easily adjusted according to the size of the flask according to the injection port into which the molten metal is injected. have.

Further, since the casting product is separated from the upper mold body after the completion of the casting by the flask, and the casting product protruding portion is lifted to a predetermined height, the casting product can be easily taken out from the lower casting mold body It has its purpose.

Further, since the outer side of the flask further includes a preheating portion for applying heat, the temperature of the molten metal injected into the flask is prevented from being changed, whereby the molten metal flows uniformly into the inside of the flask and the defective castings can be prevented from being produced It has its purpose.

In order to accomplish the above object, the present invention is characterized in that it comprises a base, a guide part provided on the base, a rotating part provided on the base, and a flask mounted on the rotating part.

Here, the guide unit may include a plurality of guide rods that are vertically installed on the upper corners of the base, and an upper plate provided on the guide rods.

The rotation unit includes a rotating plate provided on a base and having a pulley at a lower portion thereof, and a driving motor connected to the rotating plate by a pulley and a belt.

In addition, the flask is composed of a lower mold body provided on an upper part of a rotating plate of the rotary part, and an upper mold body placed on the upper part of the lower mold body.

Here, the lower mold body is installed to be spaced apart from the upper portion of the rotary plate, and a plurality of support rods are provided on the lower rotary plate, and an elastic shaft is disposed inside the support rod, and the elastic shaft is provided with elastic members And are fixed to each other.

Further, the upper mold body may have an injection port formed at an upper portion thereof, and a seating protrusion corresponding to each of the side portions may be provided.

Further, the lifting and lowering part for lifting the upper mold body of the flask is further provided.

Here, the elevating portion includes a lifting plate slidably mounted on a guide bar of a guide portion, and a first cylinder installed on an upper plate of the guide portion so that a cylinder rod is engaged with and fixed to an upper portion of the lifting plate, And a seating member formed on the seating folded surface so that the seating protrusion provided on the upper mold body is seated therebelow.

Furthermore, the apparatus further includes a molten metal injection unit for injecting molten metal into the injection port of the upper mold body of the flask.

In addition, the molten metal injection unit may include a horizontal fixing member which is provided on the rising steel plate of the elevating unit and has a first adjusting groove formed in the longitudinal direction thereof, and is slidably coupled to the horizontal fixing member, A vertical fixing member, and an injection hopper slidably coupled to the vertical fixing member.

Further, the present invention is further characterized in that a cast article protrusion for raising the cast article produced in the flask is further provided.

In this case, the casting projecting portion is provided with a lifting bar that is installed to penetrate through a central portion of the rotary part of the rotary part, and a drawer plate provided on the upper part of the lifting rod and having a drawing pin provided to penetrate the lower casting body of the flask, And a second cylinder for operating the lifting bar.

Further, a preheating torch provided on the base for applying heat to the flask is further provided.

According to the present invention configured as described above, the upper mold is raised and lowered by the lifting and lowering portion, thereby automatically raising and lowering the upper mold, thereby preventing a safety accident from occurring.

The injection hopper for injecting the molten metal into the flask is vertically and horizontally moved so that the position of the injection member can be easily adjusted according to the size of the flask according to the injection port into which the molten metal is injected .

Further, since the casting product is separated from the upper mold body after the completion of the casting by the flask, and the casting product protruding portion is lifted to a predetermined height, the casting product can be easily taken out from the lower casting mold body .

Further, since the outer side of the flask further includes a preheating portion for applying heat, the temperature of the molten metal injected into the flask is prevented from being changed, whereby the molten metal flows uniformly into the inside of the flask and the defective castings can be prevented from being produced .

1 is a perspective view showing a centrifugal casting apparatus according to the present invention.
2 is a front view showing a centrifugal casting apparatus according to the present invention.
3 is a sectional view showing a centrifugal casting apparatus according to the present invention.
4 is a view showing the flask, the rotating part, and the casting protrusion of the present invention.
Figures 5A and 5B show the molten metal injection part of the present invention.
6A to 6C are diagrams showing a working relationship of a centrifugal casting apparatus according to the present invention.

Hereinafter, a centrifugal casting apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a centrifugal casting apparatus according to the present invention, FIG. 2 is a front view showing a centrifugal casting apparatus according to the present invention, FIG. 3 is a sectional view showing a centrifugal casting apparatus according to the present invention, FIG. 5A and FIG. 5B are views showing a molten metal injection part of the present invention. FIG.

1 to 5B, the centrifugal casting apparatus 100 according to the present invention includes a base 110, a guide unit 210 installed on the base 110, A rotary part 310 and a flask 410 installed in the rotary part 310 to produce a casting product.

Here, the base 110 is composed of a horizontal and a vertical frame 112, and a space is formed on the inner side, and a table 114 is provided on the upper side.

The guide unit 210 is provided with a plurality of guide rods 212 protruding upward from corners of the upper end of the table 114 of the base 110.

An upper plate 214 is coupled to the upper portion of the guide rod 212 by bolts or the like.

The rotary part 310 is provided on the table 114 of the base 110 and includes a rotary plate 312 protruding to a lower portion of the table 114 and having a rotary shaft 314 provided with a pulley 316 .

Here, a pulley 316 provided on a rotary shaft 314 of the rotary plate 312 and a motor 320 connected with a belt V are provided.

Therefore, the rotation plate 312 connected to the belt V by the operation of the motor 320 performs a rotation operation.

The flask 410 is provided with a lower mold body 412 provided on a rotary plate 312 of the rotary unit 310 and an upper mold body 420 mounted on the upper side of the lower mold body 412. [ .

Here, the lower mold body 412 is provided with a casting mold on the upper part thereof and spaced apart from the upper part of the rotation plate 312, and a plurality of support bars 414 provided on the rotation plate 312 at the lower part thereof, And an elastic member 418 provided on the inner side of the support shaft 414. The elastic member 418 is fitted to the elastic shaft 416. [

Therefore, the impact is relieved by the elastic member 418 when the upper mold body 420 is seated on the upper mold body 412.

Further, the upper mold body 420 is formed with a mold corresponding to the mold of the lower mold body 412 at the lower part thereof, an injection port 422 formed at the upper part thereof, and formed into a " And a mounting projection 424 corresponding to the mounting projection 424 are provided.

When the upper mold body 420 is placed on the lower mold body 412, the molten metal is injected through the injection port 422. At this time, by the rotation of the rotation unit 310, The molten metal is uniformly injected while rotating, and the cast product is produced.

The elevator 510 is installed on the guide part 210 to move up and down the upper mold body 420 of the flask 410.

The elevating unit 510 includes a lift plate 512 which is positioned below the upper plate 214 to be slidably engaged with the guide rod 212.

Further, a first cylinder 514 installed on the upper plate 214 and fixed to the upper portion of the lifting plate 512 by a bolt fixing means is provided.

The lower part of the elevating plate 512 is fixed to the lower part of the elevating plate 512 by bolt fixing means and the lower part is fixed to the lower part of the elevating plate 512 And a seating member 520 having a seat folding surface 522 on which the seat fixing protrusion 424 of the upper mold body 420 is seated.

The first cylinder 514 is operated to move the lifting plate 512 in a state where the seating protrusion 424 provided on the upper mold body 420 is seated on the seat folding surface 522 of the seating member 520, And the upper and lower mold bodies 420 and 420 are coupled to and separated from the lower mold body 412.

The molten steel plate 512 of the elevating part 510 is further provided with a molten metal injecting part 610 for guiding the injection of the molten metal into the injection port 422 formed in the upper mold body 420 of the prism mold 410 .

The upper portion of the molten metal injection unit 610 is connected to the lift plate 512 by bolt fastening means. The other end of the molten metal injection unit 610 is fixed to the lift plate 512, There is provided a horizontal fixing member 612 having a first adjusting groove 614 formed therein.

The vertical fixing member 620 is coupled to the first adjusting groove 614 of the transverse fixing member 612 by bolt fixing means and the second adjusting groove 622 is formed in the longitudinal direction.

Accordingly, the position of the bolt can be adjusted by loosening the bolts fastened to the first adjusting groove 614 and then sliding the vertical fixing member 620 and tightening the bolts.

The injection hopper 630 is fixed to the second adjusting groove 622 of the vertical fixing member 620 by a bolt fixing means.

The injection hopper 630 is slidable in the ascending and descending directions along the second adjusting groove 622 formed in the vertical fixing member 620 so that the horizontal fixing member 612 and the vertical fixing member 620 The position of the injection hopper 630 can be freely adjusted along the first and second adjustment grooves 614 and 622 formed in the upper and lower mold bodies 420 and 420, It is possible to easily adjust the position of the injection port 422 to match the position of the injection port 422.

A casting protrusion 710 is also provided to protrude upward so that the casting product produced in the casting mold 410 and located in the casting mold of the lower casting mold body 412 can be easily separated.

The casting protrusion 710 passes through the center of the rotary plate 312 of the rotary part 310 and one side is positioned at the lower end of the lower mold body 412 provided at the upper part of the rotary plate 312, And a lifting rod 712 is provided so as to protrude from the lower portion of the pulley 316.

Further, a draw-out plate 714 is fixed to the upper portion of the elevating rod 712 by a fixing means and has a draw-out pin 716 which is installed to penetrate the lower casting body 412 at an upper portion thereof.

Further, a second cylinder 718 installed in the base 110 and coupled to the elevating rod 712 with the cylinder rod projecting downwardly provided with the pulley 316 is provided.

The lifting rod 712 is lifted and lowered by the operation of the second cylinder 718 so that the lifting pin 712 is lifted and lowered by the pulling pin 716 by the same operation of the lifting plate 714, The lower part of the casting is pressed so as to be spaced apart from the upper part by a predetermined height so that the casting can be easily drawn out.

A preheating torch 810 installed on the table 114 of the base 110 for applying heat to the flask 410 is further provided.

Therefore, the provision of the preheating torch 810 maintains the flask 410 in a heated state, so that even when the molten metal is injected into the flask 410, the temperature change at the beginning and the end of the injection does not significantly occur It is possible to prevent the production of defective castings.

The operation of the thus configured centrifugal casting apparatus according to the present invention will be described below.

6A to 6C are diagrams showing the working relationship of the centrifugal casting apparatus according to the present invention.

As shown in the drawing, the centrifugal casting apparatus 100 according to the present invention is configured such that the lifting plate 512 is positioned at the upper end, and the upper mold body 420 is formed on the seating member 520 of the lifting unit 510 The seating protrusion 424 is held on the seating folded surface 522.

In this case, when the first cylinder 514 is operated, the lifting plate 512 is moved downward along the guide rod 212. When the lifting plate 512 is moved downward The upper mold body 420 which is seated on the seating member 520 is seated on the upper portion of the lower mold body 412 and is brought into a coupled state.

At this time, when the upper mold body 420 is seated on the lower mold body 412, the impact is relieved by the elastic force of the elastic member 418, and the crush mold 410 is prevented from being damaged.

When the lifting plate 512 is continuously lowered in the state where the upper mold body 420 is seated on the lower mold body 412, the injection hopper 630 is moved to the injection port 422 of the upper mold body 420 The seat folding surface 522 of the seating member 520 is spaced apart from the seating projection 424 by a predetermined distance, that is, a range that does not affect the rotation of the flask 410, Is ready to be completed.

At this time, the position of the injection hopper 630 is changed by horizontally sliding the vertical fixing member 620 along the first adjusting groove 614 formed in the horizontal fixing member 612, The injection hopper 630 is slidable in the vertical direction along the formed second control groove 622 so that the position of the injection hopper 630 can be easily adjusted to the injection port 422 according to the size of the flask 410 .

The molten metal is injected into the flask 410 through the injection hopper 630 while the injection hopper 630 is positioned above the injection port 422 of the upper mold body 420. [

At this time, the flask 410 is heated by using the preheating torch 810 to prevent the temperature change of the first molten metal and the last molten metal when the molten metal is injected into the flask 410 do.

Therefore, the flask 410 is heated by the preheating torch 810 to prevent the temperature change of the molten metal injected into the flask 410, thereby preventing the production of the defective castings.

When the motor 320 is operated after the completion of the injection of the molten metal into the flask 410 through the injection hopper 630, the flask rotates while the rotation plate 312 rotates.

Therefore, the molten metal injected into the inside of the flask 410 flows and distributes due to the centrifugal force rotating at a high speed in the mold, thereby preventing the fluidity failure. At the same time, it is slippery on the surface and high pressure acts on the molten metal. It is possible to produce a dense and pore-free casting.

After the casting is produced by the centrifugal force of the flask 410 as described above, the rotation of the flask 410 is stopped and the seating protrusion 424 of the upper mold body 420 is moved to the seating position of the seating member 520 When the lifting plate 512 is lifted up after being adjusted by the operator to be positioned on the upper side of the bent surface 522, the lifting plate 512 is lifted and the seating protrusion 424 is seated on the seating folding surface 522, The upper mold body 420 is lifted upward and the upper mold body 420 is separated from the lower mold body 412.

When the upper mold body 420 is raised, the casting product is placed on the lower mold body 412. When the second cylinder 718 is operated in this state, The drawer plate 714 is raised so that the drawing pin 716 provided on the drawer plate 714 pushes the casting material upward and the casting product is protruded from the upper part of the lower casting body 412.

Accordingly, when the casting product is produced in the flask 410, the upper casting body 420 is separated and the casting located at the upper portion of the lower casting body 412 is projected upward by the elevating rod 712, So that the cast article can be drawn out from the lower mold body 412.

The casting is produced by the repetitive operation as described above, and the preheating torch 810 is provided to prevent the change of the temperature of the molten metal injected into the flask 410, thereby preventing the production of the defective castings.

Although the preferred embodiments of the centrifugal casting apparatus according to the present invention have been described above, the present invention is not limited thereto. The present invention may be embodied in many other forms without departing from the spirit or scope of the following claims and the accompanying drawings. And this is also within the scope of the present invention.

100: Centrifugal casting apparatus 110: Base
112: frame 114: table
210: guide portion 212: guide rod
214: upper plate 310:
312: spindle 314:
316: Pulley 320: Motor
410: a flask 412: a lower mold body
414: support rod 416: elastic shaft
418: elastic member 420: upper mold body
422: Inlet port 424:
510: elevating part 512:
514: first cylinder 520: seat member
522: seating folded surface 610: molten metal injection part
612: transverse fixing member 614: first adjusting groove
620: vertical fixing member 622: second adjusting groove
630: Feed hopper 710: Casting protrusion
712: Wicket bar 714: Drawer plate
716: Draw-out pin 718: Second cylinder
810: Preheating torch V: Belt

Claims (13)

A base,
A guide unit having a plurality of guide rods installed vertically to upper corner portions of the base and having an upper plate installed on the guide rods,
A rotating part provided on the base and provided with a pulley provided at a lower part thereof, a rotating part provided with a pulley provided on the rotating plate and a driving motor connected to each other by a belt,
A lower mold body mounted on a rotating plate of the rotary unit, an upper mold body having an injection port formed on an upper portion of the lower mold body and having a seating protrusion corresponding to each of the side portions,
And a first cylinder installed on an upper plate of the guide unit so that a cylinder rod is engaged with and fixed to an upper portion of the lift plate, wherein the first cylinder is installed at a lower portion of the lift plate, A lifting unit for lifting the upper mold body by a seating member formed on a seat folding surface so that the seating protrusion provided on the upper mold body is seated;
A transverse fixing member provided on the elevating plate of the elevating portion and having a first adjusting groove formed in a longitudinal direction thereof and being fixed to the first adjusting groove of the transverse fixing member so as to be slid in a horizontal direction, A molten metal injection unit for injecting the molten metal into the injection port of the upper mold body, the molten metal injection unit including an injection hopper having a vertical fixing member having a groove formed therein and slidably coupled to the second control groove of the vertical fixing member,
A lifting bar provided to penetrate the central portion of the rotary part of the rotary part and having a draw-out plate provided on the upper part of the lifting bar and provided with a draw-out pin penetrating the lower mold body of the flask, A casting protrusion provided with a second cylinder for raising the casting produced in the flask,
And a preheating torch provided on the base for applying heat to the flask when the molten metal is injected into the flask,
The lower mold body is provided so as to be spaced apart from the upper portion of the rotary plate, and a plurality of support rods are provided on the lower plate at the lower portion. An elastic shaft is disposed inside the support rod, Wherein the centrifugal casting apparatus is a centrifugal casting apparatus.
delete delete delete delete delete delete delete delete delete delete delete delete

Images