KR101794921B1 - Manufacturing Method of Float for nonferrous metal Casting and Float for nonferrous metal Casting Thereby - Google Patents

Manufacturing Method of Float for nonferrous metal Casting and Float for nonferrous metal Casting Thereby Download PDF

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Publication number
KR101794921B1
KR101794921B1 KR1020160010937A KR20160010937A KR101794921B1 KR 101794921 B1 KR101794921 B1 KR 101794921B1 KR 1020160010937 A KR1020160010937 A KR 1020160010937A KR 20160010937 A KR20160010937 A KR 20160010937A KR 101794921 B1 KR101794921 B1 KR 101794921B1
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KR
South Korea
Prior art keywords
float
ferrous metal
casting
mold
ferrous
Prior art date
Application number
KR1020160010937A
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Korean (ko)
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KR20170090283A (en
Inventor
이철원
Original Assignee
주식회사 세라코
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Priority to KR1020160010937A priority Critical patent/KR101794921B1/en
Publication of KR20170090283A publication Critical patent/KR20170090283A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0003—Producing profiled members, e.g. beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0092—Drying moulded articles or half products, e.g. preforms, during or after moulding or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

The present invention relates to a method for producing a float for casting a non-ferrous metal and a float for casting a non-ferrous metal produced by the manufacturing method, wherein the float is lifted or lowered so as to be immersed in or drawn out of the non-ferrous metal melt in the non-ferrous metal furnace, Casting a non-ferrous metal casting float into a mold for casting a non-ferrous metal by vacuum-molding a paste-like ceramic material, and then drying, firing and processing the same to manufacture a float body for casting a non-ferrous metal made of a ceramic material It is 50% lighter than conventional non-ferrous metal cast float, and it is prevented from thermal deformation and breaking damage.

Description

TECHNICAL FIELD The present invention relates to a float for casting a non-ferrous metal, and a float for casting a non-ferrous metal,

The present invention relates to a method for producing a float for casting a non-ferrous metal and a float for casting the non-ferrous metal produced by the method, and more particularly to a float for casting a non-ferrous metal, A non-ferrous metal casting float produced by vacuum forming a non-ferrous metal casting float, minimizing occurrence of thermal deformation during use and lightweight, and greatly improving operability, and a non-ferrous metal casting float produced by this manufacturing method.

Generally, ingots of non-ferrous metals such as copper, aluminum, zinc, and tin are produced by melting non-ferrous metal scrap in a heating furnace and then injecting molten molten metal into the casting mold.

The molten metal in the heating furnace is overflowed in the heating furnace by a float for casting a non-ferrous metal to be lifted up and flows into the casting mold along the overflow channel.

When the non-ferrous metal casting float is lowered and inserted into the heating furnace, the molten metal in the heating furnace overflows in the heating furnace.

That is, the float for casting the non-ferrous metal is raised and lowered again to repeatedly overflow the molten iron in the heating furnace to supply the molten non-ferrous metal into the casting mold.

FIG. 1 is a perspective view showing a conventional float for casting a non-ferrous metal. The float for casting the non-ferrous metal is manufactured by stacking a plurality of ceramic disks.

The float 1 for casting a nonferrous metal is formed by laminating a plurality of discs 1a of ceramic material having a thin thickness and pressurizing and compressing them with a nut 1c fastened to the bolt 1b, 1a is machined to the desired final shape.

However, since the conventional float for casting for non-ferrous metals is manufactured by stacking and compacting discs 1a made of ceramics about 200 sheets at a time, it requires a minimum of two workers at the time of replacing, There is a problem that the worker's work fatigue is high.

In addition, in the conventional casting float for casting for non-ferrous metals, the molten metal is infiltrated into the clearance of a large number of stacked discs 1a, so that a part of the end portion is cut and damaged, and deformation easily occurs due to the high temperature of the molten metal.

That is, the conventional float for casting for non-ferrous metals is often replaced by breakage of the end side portion or heat deformation due to the high temperature of the molten metal, which requires a lot of workers during the replacement work and high work fatigue in the work.

Korean Patent Laid-Open No. 2008-0040969 'Method and apparatus for manufacturing aluminum alloy using aluminum scrap' (disclosed on May 5, 2008)

It is an object of the present invention to provide a method for manufacturing a non-ferrous metal casting float which is vacuum-molded so that thermal deformation during use is minimized and the introduction of molten metal into the inside is completely prevented and lightweight, There is provided a non-ferrous metal cast float.

According to an aspect of the present invention, there is provided a method of manufacturing a non-ferrous metal casting float according to an embodiment of the present invention, wherein the non-ferrous metal casting is floated or pulled out in a non-ferrous metal heating furnace to overflow the non-ferrous metal heating furnace A method for manufacturing a non-ferrous metal casting float, comprising the steps of: mixing a ceramic material with a ceramic material; injecting the mixed ceramic material into a vacuum chamber placed in a vacuum chamber; A primary drying step of drying the float formed body molded in the mold, a firing step of firing the dried float body, and a float processing step of forming the float body for casting the non-ferrous metal by processing the fired float body .

The method for producing a float for casting a non-ferrous metal according to an embodiment of the present invention includes a step of impregnating the float formed body dried before the firing step after the primary drying step into a surface strengthening solution, And a second drying step of letting the second drying step be performed.

In the present invention, the surface strengthening solution may be a liquid silica in the form of a solution in which solid silica having a concentration of 25 to 35% by weight is dispersed in a solvent.

The method of manufacturing a non-ferrous metal casting float according to an embodiment of the present invention may further include a release agent coating step of coating a molten metal release agent on the outer circumferential surface of the processed float body for non-ferrous metals casting.

The non-ferrous metal casting float according to the present invention is characterized in that it is manufactured by the method of manufacturing a non-ferrous metal casting float according to an embodiment of the present invention.

The float for casting a non-ferrous metal according to the present invention is characterized by including a float body for casting a non-ferrous metal, which is formed of a single body by vacuum molding and formed of a ceramic material.

In the present invention, the ceramic material may include a ceramic fiber, an organic binder, and an inorganic binder.

In the present invention, the surface of the float body for casting a non-ferrous metal may be impregnated with silica.

In the present invention, a molten metal release agent coating layer may be formed on the surface of the float body for casting a non-ferrous metal.

The present invention relates to a casting machine which can be formed into a single body having no gap by vacuum molding and can completely prevent an accident that the molten non-ferrous metal is infiltrated into the molten metal during its lifting and descending movement in the molten steel, .

The present invention minimizes thermal deformation during casting of a non-ferrous metal and can be used stably for a long period of time, prevents an accident caused by heat deformation during casting operation, and reduces the cost of casting the non-ferrous metal.

The present invention reduces the weight of the conventional disk laminated non-ferrous metal casting float by about 50%, so that one operator can sufficiently perform the replacement work and greatly reduce the fatigue in the replacement work.

1 is a perspective view showing a casting float for a conventional non-ferrous metal;
2 is a view showing an example of use of a float for casting for non-ferrous metals according to the present invention
3 is a process chart of a method for producing a float for casting a non-ferrous metal according to the present invention.
4 is a schematic view illustrating a processing step in a method of manufacturing a float for casting a non-ferrous metal according to the present invention.
5 is a perspective view showing a float for casting a non-ferrous metal according to the present invention.
6 is a sectional view showing a float for casting a non-ferrous metal according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

FIG. 2 is a view showing an example of using a float for casting for non-ferrous metals according to the present invention. FIG. 2 is a view showing that the float for casting a non-ferrous metal according to the present invention is lowered so that it is immersed in a molten non- The float for casting the non-ferrous metal is lifted and drawn out from the non-ferrous metal melt in the heating furnace for the non-ferrous metal.

2, the casting float 100 'for casting for non-ferrous metals according to the present invention is lifted and inserted into or taken out of molten metal in the non-ferrous metal heating furnace 2 to be immersed in the molten non-ferrous metal, (2), the molten metal is overflowed and injected into the mold for casting the non-ferrous metal.

That is, the method for manufacturing a non-ferrous metal casting float according to the present invention is a method of casting a non-ferrous metal casting material into a non-ferrous metal casting mold by overflowing the non-ferrous metal melt in the non- To a manufacturing method for manufacturing a float.

3, a method of manufacturing a non-ferrous metal casting float according to the present invention includes a material mixing step (S100) for mixing a ceramic material, a mixed ceramic A vacuum molding step S200 for injecting the material into the inside of a mold disposed in a vacuum chamber in a vacuum state, a primary drying step S300 for drying the float molding formed in the mold, And a float processing step (S700) of forming a float body for casting a non-ferrous metal by processing the sintered float formed body (S600).

The material mixing step (S100) includes mixing a ceramic fiber, an organic binder, an inorganic binder, and water in a mixing tank.

The ceramic fiber is excellent in heat resistance, light in weight, and excellent in moldability.

Also, the organic binder serves to improve the strength of the non-metal casting float at room temperature, and the inorganic binder serves to improve the hot strength of the non-ferrous metal cast float.

In the vacuum forming step S200, a mold is disposed in a vacuum chamber, a vacuum chamber is formed in the vacuum chamber, a ceramic material prepared in the material mixing step S100 is injected into the mold, And is formed into a corresponding shape.

That is, in the vacuum forming step S200, the ceramic material in paste form is vacuum-injected in the vacuum chamber to mold the float formed body.

In the vacuum forming step S200, a fixing rod member for mounting the finally processed float body for casting the non-ferrous metal to the lifting device may be inserted into the ceramic material in paste form.

The fixing rod member is threaded on the outer circumferential surface of the fixing rod member and screwed to the elevating and lowering device.

In the vacuum forming step S200, the paste-type ceramic material injected into the mold is injected without pores to fill the cavity.

The float formed body is dried through the primary drying step (S300). In the primary drying step (S300), the float formed body in the metal mold is dried in the drying furnace at a temperature of 120 to 140 ° C for 20 to 30 hours As an example.

The method for producing a float for casting a non-ferrous metal according to the present invention includes the step (S400) of impregnating the float formed body before the firing step (S600) in the surface strengthening solution after the primary drying step (S300); And a second drying step (S500) of drying the impregnated float formed body.

The surface strengthening solution is, for example, liquid silica. It is preferable that the surface strengthening solution is a liquid silica in the form of a solution in which solid silica having a concentration of 25 to 35% by weight is dispersed in a solvent.

The surface strengthening solution must penetrate into the float molding body when the float molding body is impregnated so as to strengthen the surface of the finally formed, non-ferrous metal cast float body in the processing step.

Since the surface strengthening solution must be penetrated to the inside of the portion where the float molding is processed by cutting in the impregnation step (S400), the concentration of the liquid silica is preferably 35% or less, and when the concentration of the liquid silica is 35% There is a problem that it is difficult to penetrate deeper into the interior of the primarily dried float formed body, that is, the inside of the portion where the float formed body is processed and cut.

 If the concentration of the liquid silica is 25% or less, the surface strengthening effect of the processed float body for non-ferrous metal casting can not be obtained.

In the secondary drying step (S500), the float formed body after the impregnating step (S400) is dried in the drying furnace at a temperature of 120 to 140 ° C for 20 to 30 hours.

The float formed body subjected to the secondary drying step (S500) is fired at a temperature of 600 to 800 ° C in the firing step (S600) to remove unnecessary portions of the organic binder, and the float body for casting for non- The float body for casting for non-ferrous metals is prevented from being hot shrinked while being immersed in the molten metal.

4, in the float forming step S700, the sintered float body 10 is processed into a designed shape using a processing machine such as a lathe to form a float body for casting a non-ferrous metal, 10 are formed in a rectangular parallelepiped shape and processed to form a circular rod-shaped float body 100 for casting a non-ferrous metal.

Referring again to FIG. 3, the method for manufacturing a non-ferrous metal casting float according to the present invention may further include a release agent coating step (S800) for coating a molten metal release agent on the outer circumferential surface of the machined non-ferrous metal casting float body.

The molten metal release agent serves to release the non-ferrous metal melt adhering to the surface of the non-ferrous metal casting float body by immersing the float body for casting the non-ferrous metal in the non-ferrous metal melt.

The releasing agent coating step (S800) includes a step of applying a molten metal releasing agent in a liquid phase to the outer circumferential surface of the non-ferrous metal casting float body, and a step of drying or curing the applied molten metal releasing agent.

FIG. 5 is a perspective view showing a float for casting a non-ferrous metal according to the present invention, and FIG. 6 is a sectional view showing a float for casting a non-ferrous metal according to the present invention.

5 and 6, the float for casting a non-ferrous metal according to the present invention is manufactured by the method for producing a float for casting a non-ferrous metal according to the present invention, And a float body 100 for casting the non-ferrous metal, which is formed of a ceramic material.

The non-ferrous metal casting float according to the present invention may further include a fixing rod member 110 inserted in one longitudinal end of the non-ferrous metal casting float main body 100 and mounted on the lifting / lowering apparatus.

The fixing rod member 110 is screwed to the lifting / lowering device with a screw thread formed on the outer peripheral surface thereof.

The float body 100 for casting a non-ferrous metal is formed as a single body having no gap or seam at a portion excluding the insertion portion of the fixing rod member 110.

The ceramic material includes a ceramic fiber, an organic binder, and an inorganic binder.

In addition, the surface of the non-ferrous metal casting float body 100 is impregnated with the silica 101 to strengthen the surface strength.

The molten metal release agent coating layer 120 is formed on the surface of the non-ferrous metal casting float main body 100 and the molten metal release agent coating layer 120 is immersed in the non-ferrous metal molten metal float body 100 And serves to release the non-ferrous metal melt on the surface of the non-ferrous metal casting float body 100.

The present invention relates to a casting machine which can be formed into a single body having no gap by vacuum molding and can completely prevent an accident that the molten non-ferrous metal is infiltrated into the molten metal during its lifting and descending movement in the molten steel, .

The present invention minimizes thermal deformation during casting of a non-ferrous metal and can be used stably for a long period of time, prevents an operation interruption due to thermal deformation during casting operation, and reduces the cost of casting of non-ferrous metals.

The present invention can greatly reduce the weight of the operator, thereby enabling one operator to perform a sufficient replacement operation and greatly reducing the fatigue of the replacement operation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the above teachings. will be.

S100: material mixing step S200: vacuum molding step
S300: primary drying step S400: impregnation step
S500: Secondary drying step S600: Firing step
S700: Float processing step S800: Release agent coating step
100: Float body 101 for casting nonferrous metal 101: Silica
110: Fixing rod member 120: Molten metal release agent coating layer

Claims (10)

A method of manufacturing a non-ferrous metal casting float in which a non-ferrous metal melt is raised or lowered so as to be immersed in or drawn out of a non-ferrous metal melt in a non-ferrous metal furnace to overflow the non-ferrous metal melt in the non-ferrous metal casting mold,
A material mixing step of mixing the ceramic material;
A vacuum forming step of injecting and molding the mixed ceramic material into the inside of a mold disposed in a vacuum chamber in a vacuum state;
A primary drying step of drying the float formed body molded in the mold;
A firing step of firing the dried float compact; And
And a float forming step of forming the float body for casting the non-ferrous metal by processing the fired float compacted body,
In the vacuum forming step, a float formed body in which the fixing rod member is inserted into one end side in the longitudinal direction by inserting the fixing rod member into the metal mold is molded,
Further comprising a release agent coating step of coating a molten metal release agent on an outer circumferential surface of the machined float body for casting the non-ferrous metal after the float processing step. The method according to claim 1,
Wherein the material mixing step comprises mixing a ceramic fiber, an organic binder, an inorganic binder, and water in a mixing tank. The method of claim 2,
An impregnating step of impregnating the float formed body dried before the firing step in the surface strengthening solution after the primary drying step; And
Further comprising a second drying step of drying the impregnated float compact. The method of claim 3,
Wherein the surface strengthening solution is a liquid silica in the form of a solution in which solid silica having a concentration of 25 to 35% by weight is dispersed in a solvent. The method according to claim 1,
Wherein the fixing rod member is a rod member having a thread formed on an outer circumferential surface thereof and capable of being screwed to an elevating and lowering apparatus. A float for casting a non-ferrous metal, which is produced by the method of any one of claims 1 to 5. delete delete delete delete
KR1020160010937A 2016-01-28 2016-01-28 Manufacturing Method of Float for nonferrous metal Casting and Float for nonferrous metal Casting Thereby KR101794921B1 (en)

Priority Applications (1)

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KR1020160010937A KR101794921B1 (en) 2016-01-28 2016-01-28 Manufacturing Method of Float for nonferrous metal Casting and Float for nonferrous metal Casting Thereby

Applications Claiming Priority (1)

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KR1020160010937A KR101794921B1 (en) 2016-01-28 2016-01-28 Manufacturing Method of Float for nonferrous metal Casting and Float for nonferrous metal Casting Thereby

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KR20170090283A KR20170090283A (en) 2017-08-07
KR101794921B1 true KR101794921B1 (en) 2017-11-07

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