KR101596337B1 - Manhole base manufacturing device using the casting shrinkage - Google Patents

Abstract

The present invention relates to a manhole base manufacturing device using cast shrinkage. More specifically, the manhole base manufacturing device using cast shrinkage comprises: an extension unit having a through hole penetrating therethrough; a core unit having an annular insertion protrusion to allow the lower end thereof to be inserted into an upper portion of the through hole; an armor unit arranged on an upper surface of the extension unit to maintain a prescribed gap from an outer circumferential surface of the core unit to form a forming space; a transport cylinder to move the armor unit; and a cover covering an upper portion of the core unit and the armor unit and having an injection hole for inserting a cast into the forming space. The core unit is mounted on the extension unit to form a manhole base to facilitate separation of the core unit by cast shrinkage. The through hole is formed in the extension unit to easily separate and discharge the core unit used.

Description

Technical Field [0001] The present invention relates to a manhole base manufacturing apparatus using casting shrinkage,

More particularly, the present invention relates to an apparatus for manufacturing a manhole cover using casting shrinkage, and more particularly, to a method for manufacturing a manhole cover using casting shrinkage, And a casting shrinkage that facilitates separation and discharge of the used core portion by forming a hole.

In general, casting is classified into cast iron casting, aluminum alloy casting, copper alloy casting, etc. according to the metal used, or by the type of casting mold and the flow of molten metal. The material of the mold is a mold that is made by engraving metal such as sand mold or steel which is made by molding sand molding firmly and sand is mixed with particles of synthetic resin which becomes hard when heated, There are various kinds of molds such as cast mold, mold casting, shell mold, etc., which are formed on a heated metal mold and then solidified to form a thin shell mold. The molten metal can be introduced by gravity casting using gravity, die casting by pressing molten metal into a mold, centrifugal casting using a centrifugal force to send molten metal to every corner of the mold, , The mold is turned downward, a part of it is placed on the surface of the molten metal, and the surface of the molten metal is pressurized with gas to put the molten metal in the mold, while the molten metal is sucked up from the bottom of the mold Injection molding method (injection molding method), etc.

Such casting work is made by making a casting device or by making a mold as in Korean Patent Application No. 10-2010-0086166. In the case of metal molds, metal pellets are poured to form a concave portion, which does not interfere with the flow of metal and has heat resistance (heat resistance). Since the mold uses a single mold several hundred times, it is divided into several pieces so that the casting can be easily removed after solidification. In the death penalty, you have to break the mold every time and remove the casting, so you have to make the number of molds. Usually, molds made by dividing a model of wooden product into several molds (mother mold) are put into a mold, and the mold is made by sanding around and hardening the mold, and then pulling out the mold. However, a combination of a cylinder and a disk is called a sweeping mold, and a mold is formed by rotating the shape of the plate made of the sand while making a sand mold. Next, it dissolves metals in various types of melting furnaces. In the case of alloys, pre-formulated components are first placed in a ladle and injected into the mold. Wait for hardening and take out the object. If it is dead, remove the sand and finish it as it is or finish the casting surface with the product. The coal stove is an example of the casting surface as it is, and the cast iron pot is an example of finishing.

In recent years, in order to manufacture a manhole frame to be formed by casting, a manhole frame is formed by injecting a casting between a mold core and a steel pipe. However, there is a problem that steel pipes melt during the casting of the casting, There arises a problem that it is difficult to separate them from each other.

The above-mentioned invention means the background art of the technical field to which the present invention belongs, and does not mean the prior art.

The apparatus for manufacturing a manhole cover using casting shrinkage according to the present invention is a device for manufacturing a manhole base using casting shrinkage by forming a bare head support by fastening a core part to a rough surface to facilitate separation from a core part due to shrinkage of the casting, And it is an object of the present invention to provide a manhole holder manufacturing apparatus using casting shrinkage which facilitates separation and discharge.

The present invention relates to a manhole cover manufacturing apparatus, comprising: a core portion having a through hole formed to penetrate therethrough; a core portion having an annular fitting protrusion formed on an upper portion of the through hole to receive a lower end thereof; A feed cylinder arranged to cover the upper portion of the core portion and the rim portion and having an injection port formed to allow the casting to flow into the molding space; And a cover.

In addition, the core portion is formed in a hollow structure.

In addition, a plurality of spacing protrusions may be further formed on the bottom surface of the bottom portion, a pair of rails may be further provided, and a discharge basket may be provided to guide the rails and to receive the cores discharged through the through holes. .

The vibrating module part is provided with a working groove, a pair of striking projections are formed on one surface of the working groove, and the operation part And an inner surface of the groove is further provided with a vibration device including an eccentric cam for hitting the impact protrusion and a motor for rotating the eccentric cam.

In addition, the cover may be provided with an operating groove for discharging the core through the through hole of the bottom portion, an operating cylinder is provided in the operating groove, a pressure panel is provided at an end of the operating shaft of the operating cylinder, And a vibration module portion is further provided.

The apparatus for manufacturing a manhole cover using casting shrinkage according to the present invention is a device for manufacturing a manhole base using casting shrinkage by forming a bare head support by fastening a core part to a rough surface to facilitate separation from a core part due to shrinkage of the casting, So that separation and discharge are facilitated.

1 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a first embodiment of the present invention.
FIG. 2 is a plan view showing a manhole cover and a ridge portion in a manhole cover manufacturing apparatus using casting shrinkage according to a first embodiment of the present invention. FIG.
3 is a plan view of a cover for a manhole cover manufacturing apparatus using cast shrinkage according to a first embodiment of the present invention.
4 is a view showing an operating state of a manhole cover manufacturing apparatus using casting shrinkage according to the first embodiment of the present invention.
5 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a second embodiment of the present invention.
6 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a third embodiment of the present invention.
7 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a fourth embodiment of the present invention.
8 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a fifth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a manhole cover manufacturing apparatus using cast shrinkage according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as an example, and various embodiments may be implemented through the present invention.

FIG. 1 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a first embodiment of the present invention. FIG. 2 is a perspective view of a manhole cover manufacturing apparatus using casting shrinkage according to a first embodiment of the present invention, 3 is a plan view of a lid for a manhole cover manufacturing apparatus using casting shrinkage according to the first embodiment of the present invention. FIG. 4 is a plan view showing the casting shrinkage according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a second embodiment of the present invention, and FIG. 6 is a cross-sectional view of a third embodiment of the present invention. FIG. 7 is a cross-sectional view of a manhole cover manufacturing apparatus using casting shrinkage according to a fourth embodiment of the present invention, and FIG. 8 is a cross- Of a cross-sectional view illustrating a manufacturing apparatus using the receiving manhole casting shrinkage according to the fifth embodiment.

As shown in the drawings, an apparatus 10 for manufacturing a manhole cover using casting shrinkage according to the present invention (hereinafter referred to as a manhole cover manufacturing apparatus for convenience of explanation) is a manhole holder manufacturing apparatus for manufacturing a manhole cover by casting method, The same manhole cover manufacturing apparatus is composed of the roughing section 20, the core section 30, the iron opening section 40, the transfer cylinder 50, and the lid 60.

The protrusion 20 is made of a metal material and a through hole 21 is formed at the center of the upper surface portion. The through hole 21 penetrates the lower portion of the core portion 30 as shown in FIG. 1 .

At this time, at least one guide protrusion (22) protrudes from the upper surface of the turntable (20). 2, the guide protrusion 22 is integrally formed on the upper surface of the turntable 20 so that the ironing member of the ironing unit 40 to be described later is guided.

The molten metal is poured into a mold and hardened to form a product. The core (mold) 30 is made by hardening the sand in the mold. The sand used is mainly made of silica sand, ) And is also called refractory casting which is easy to mold because of its good fire resistance. It is molded by adding water appropriately to it. It is called a raw sand mold while the dried one is called a dry mold. The core portion of the present invention hardens the sand to form the core portion 30.

The core portion 30 may be formed of a metal material so as to be separated and joined. And an annular fitting protrusion 31 is formed on the bottom surface of the fitting groove 21 so that the lower end of the fitting protrusion 31 is inserted.

Here, the core portion 30 is formed with a molding bent portion 32 for molding the outer surface of the manhole cover 100 at the side surface as shown in FIG.

At this time, it is also possible to further form a shell mold layer in the molding bend section 32.

The shell mold layer is formed by heating the mixture of sand and the synthetic resin, which is solidified (melted and cured), by heating, or by heating the core portion 30 and spraying the mixture to form a shell- The formed manhole cover 100 can be easily separated, the surface of the manhole cover 100 is smoothly maintained, and the manhole cover 100 is contracted in the process of casting to facilitate separation of the core again.

The shell mold is preferably formed in the process of forming the core part 30, and it is preferable that the shell mold is integrally formed and then fastened to the protrusions 20.

The iron part 40 is made of a metal material and is movably disposed on the upper surface of the protrusion 20 so as to form a molding space with a certain distance from the core part 30. The molten So that the manhole cover 100 is formed.

The ironing part 40 is guided on the upper surface of the guide protrusion 22 and is moved by the transferring cylinder 50 to form a curved support surface 411 and a curved rim part 412 on the upper surface. As shown in FIG. 2, it is preferable to arrange four of the ridge members 41 on the upper portion of the ridge 20, and the number of the ridge members 41 is limited It is preferable that at least one of the ridge members 41 be disposed.

The conveying cylinder 50 is welded or screwed to the upper surface of the turntable 20 and the conveying shaft of the conveying cylinder 50 is welded to the ironing member 41 of the ironing part 40, So that the iron member 41 is moved.

The lid 60 is made of a metal material and is disposed while covering the core 30 and the upper portion of the iron part 40. An injection port 61 is formed to allow the casting to flow into the molding space.

The lid 60 is rotated by an external driving motor (not shown) or is lifted and lowered by a cylinder to open or close the upper portion of the ironing portion 40.

3, a plurality of coupling holes are formed in the lid 60 as shown in FIG. 3, and the lower end of the shell mold rod is inserted into the coupling hole so that the lower end of the shell mold rod is inserted into the lid member 41, And a shell mold tube is further inserted into the injection port 61 of the lid.

That is, in order to solve the problem that the molten metal is injected into the injection port 61 during the process of flowing the molten metal through the injection port, the shell mold rod and the shell mold tube are mixed with the sand of the synthetic resin, The mixture is molded into a mold for forming a heated rod and a mold for forming a tube, and is formed into a rod and a tube. The shell mold rod is inserted into the coupling hole, and a through hole is formed in a wing of a formed pillar (manhole) And the shell mold tube is securely adhered and fixed to the injection port 61 so that the molten metal during the injection process can be easily separated and the injection port can be prevented from melting due to the heat. It is also possible to form the shell mold tube by heating the injection port 61 and spraying the mixture.

The operation of the apparatus for manufacturing a paulownia is as follows. After the core unit 30 is fastened to the piercing unit 20, the piercing cylinder 50 is operated to move the piercing member 41, After forming a molding space between the core portion 30 and the iron core member 41, the lid 60 is disposed while covering the upper portion of the iron core portion 40.

After the molten metal is injected through the injection port 61 of the lid 60, the lid 60 and the irregular member 41 are moved after a certain period of time, The core portion 30 is crushed and discharged to the outside through the through hole 21 of the tank 20 to complete a series of processes.

5, the core portion 30 may be formed in a hollow structure to reduce the amount of material for forming the core portion 30, and the core portion 30 made of the used sand may be crushed It is possible to reduce the amount of discharge through the through hole 21 as compared with the core portion 30 filled in as shown in FIG.

6, a plurality of spacing protrusions 23 are formed on the bottom surface of the turntable 20 and a pair of rails 24 are further provided. The rails 24 are connected to each other, And a discharge basket 25 is further disposed so as to receive a core portion discharged through the through hole 21. The used crushed core portion 30 discharged through the through hole 21 is inserted into the discharge basket 25 To the outside.

At this time, it is preferable that a plurality of casters are further provided on the bottom surface of the discharge basket 25.

7, vibration is transmitted to the core portion 30 and the lid 60 so that the core portion 30 is separated from the molded manhole cover 100 by vibration, A vibration module 70 is further provided to be crushed and discharged through the through hole 21. A pair of impact protrusions 72 are formed on one surface of the operation groove 71 of the vibration module 70, And an oscillating device 73 consisting of an eccentric cam 731 for hitting the hitting protrusion 72 and a motor 732 for rotating the eccentric cam 731 is formed on the inner side surface of the operating groove 71, And the eccentric cam 731 is rotated by driving the motor 732 to strike the hitting protrusion 72 to transmit the vibration. At least one or more vibration module portions 70 are preferably installed on the insectproof door 50 and fixed to the insectproof door 50 by welding or screwing.

The vibration module portion 70 is formed with an installation groove in the protrusion 20 and is inserted into the installation groove and welded or screwed to fix the vibration module portion 70.

8, an operating groove 62 is formed in the lid 60 so as to discharge the core portion 30 through the through hole 21 of the cooking cavity 20, The vibrating module unit 70 is installed in the lid 60 so that the vibrating module unit 70 is installed on the end of the operating cylinder 80 of the operating cylinder 80 do.

That is, when the manhole cover 100 is completely formed, the operating cylinder 80 is operated to press the core portion 30 so that the core portion 30 to be crushed is inserted into the through hole 21, And the vibration of the vibration module unit 70 is transmitted to the manhole cover 100 to remove the crushed core unit 30 remaining on the inner surface.

10: Manhole bearing manufacturing apparatus 20:
30: core part 40: iron part
50: Feed cylinder 60: Cover
70: Vibration module part 80: Operation cylinder
21: through hole 22: guide projection
23: spacing retaining projection 24: rail
25: Discharge basket
31: fit-in projection 32:
41: rim members 411: supporting surface
412: limb
61: inlet 62: operating groove
71: operating groove 72: striking projection
73: Vibrating device 731: Eccentric cam
732: Motor
81: Pressure panel
100: Manhole bearing

Claims (5)

In a manhole base manufacturing apparatus,
A core portion having an annular fitting portion formed at an upper portion of the through hole to be penetrated through the through hole and being discharged through a through hole of the main portion after the manhole cover is manufactured; A convex portion disposed at an upper surface of the bottom portion so as to form a molding space while maintaining a predetermined gap with the outer circumferential surface; a transfer cylinder for moving the convex portion; and an upper portion of the core portion and the convex portion, And a lid formed with an injection port for introducing the casting into the lid,
Since the core portion is formed in a hollow structure, the amount of the material can be reduced as compared with the core portion that is not hollow, so that the amount of the core portion that is crushed after manufacturing the manhole cover and discharged through the through hole of the manhole can be reduced ,
And an operating cylinder is provided in the operating groove, and a pressure panel is installed at an end of the operating shaft of the operating cylinder. The operating cylinder is provided with an operating groove for discharging the core portion through the through hole of the bottom portion, A manhole bearing manufacturing apparatus using casting shrinkage.
delete The method according to claim 1,
A plurality of spacing protrusions are further formed on the bottom of the bottom portion, a pair of rails are further provided, and a discharge basket is further disposed so as to receive the cores discharged through the through holes, Wherein the casting shrinkage of the manhole bases is measured by using the shrinkage casting method.
The method according to claim 1,
And a vibrating module unit is further provided on the turntable to transmit vibration to the core unit and the lid,
The vibrating module part is formed with an operating groove, a pair of impact protrusions formed on one surface of the operating groove, and an inner surface of the operating groove includes an eccentric cam striking the impact protrusion and a motor configured to rotate the eccentric cam Characterized in that a vibration device is additionally provided on the surface of the manhole base.
delete

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