CN113766981A - Centrifugal casting mold assembly - Google Patents
Centrifugal casting mold assembly Download PDFInfo
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- CN113766981A CN113766981A CN202080032554.3A CN202080032554A CN113766981A CN 113766981 A CN113766981 A CN 113766981A CN 202080032554 A CN202080032554 A CN 202080032554A CN 113766981 A CN113766981 A CN 113766981A
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- molten metal
- mold
- mold assembly
- centrifugal casting
- casting mold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/101—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention relates to a centrifugal casting mold assembly. The centrifugal casting mold assembly of the present invention includes: a power generation device for generating a driving force; a power transmission device for transmitting the driving force generated by the power generation device; a shoe member (130) having a cylindrical shape with an open upper part, a rotating shaft (132) being fixedly attached to the upper surface of the shoe member, the rotating shaft (132) being driven to rotate by the power transmitted by the power transmission device; a die assembly (140) fixedly provided on the upper surface of the shoe member (130), and having a semicircular die portion (144) attached to the outer periphery of the molten metal distribution opening (142) around the molten metal distribution opening (142) at the center thereof; and a cover member (150) having a cylindrical shape with an open lower portion, and provided with a molten metal injection port (152) on an upper surface thereof, the molten metal injection port being communicated with the molten metal distribution port (142) of the mold assembly (140).
Description
Technical Field
The present invention relates to a mold assembly, and more particularly, to a centrifugal casting mold assembly.
Background
In general, casting refers to an operation of injecting a molten material obtained by melting a metal material into a mold and solidifying the molten material, that is, injecting a molten metal into the mold and solidifying the molten metal, and then removing the mold to produce a product having a desired shape, and various casting processes for efficiently performing such casting operations have been developed.
Each casting process may be classified into sand casting, mold casting, precision casting, and the like according to the type of a casting mold, and in the mold casting, gravity casting, low pressure casting, high vacuum casting, centrifugal casting, and the like may be classified according to a method of injecting molten metal into a cavity (cavity) of a mold.
In the mold casting, the centrifugal casting method is a method of injecting molten metal by rotating a mold and generating a centrifugal force. That is, the centrifugal casting method is a method of forming a cast product by rotating a mold at a high speed at the time of pouring molten metal and utilizing a centrifugal force generated by the rotation, and is a widely used method because the molten metal flows into and is distributed in the mold by the centrifugal force generated by the high-speed rotation, the surface is smooth while preventing a poor fluidity, and a high pressure is applied to the molten metal, so that the structure of the cast product is dense and the cast product has no pores.
In this centrifugal casting method, a high-quality molded article having a uniform thickness can be produced only by rapidly and uniformly supplying a molten metal to all surfaces of a mold and solidifying the molten metal in a back-and-forth direction from the mold surface.
On the other hand, the mold in the centrifugal casting method corresponds to a mold frame for manufacturing a hot roll having a desired shape by injecting molten metal into the mold frame. Such a mold is formed by combining an upper mold box and a lower mold box in a general mold, and a rotating roll provided to be driven by an external driving source is rotated together with the rotation of the rotating roll to solidify molten metal injected into the interior.
That is, as a method of manufacturing a cast product by rotating a mold to flow a molten metal and utilizing a centrifugal force, there is a case where the molten metal is not allowed to reach every corner when manufacturing a complicated cast product or a fine cast product by flowing the molten metal into the mold by the action of gravity when manufacturing the cast product, and in this case, the mold is arranged radially along the circumference and a flow path for the molten metal is provided in the radial direction, and the molten metal is allowed to flow into the center of a disk, and is pressurized and cast by the centrifugal force by rotating the disk.
On the other hand, the purpose of continuously moving various liquids or gases is achieved by using a pipe body, and it is necessary to manufacture such a pipe body in a predetermined specification for various reasons such as a manufacturing method and transportation.
When laying a pipe body manufactured in this manner at a remote place, the pipe body is generally connected and used according to the conditions of a construction site. In order to connect these pipe bodies, the pipe bodies are integrally fixed by welding flanges (flanges) or the like to both ends of the pipe bodies, and the pipe bodies are fastened by abutting the flanges to each other and then using bolts.
In order to satisfy corrosion resistance, durability, and pressure resistance, a stainless (stainless) pipe is used, and when a stainless pipe is used, a flange made of stainless steel is required.
The stainless steel flange produced by the centrifugal casting method is the same as a stainless steel flange produced by sand casting, but is similar to a forged product in terms of tensile force, tensile strength, and the like, and the product has a dense structure, contains no impurities, and can be produced into a flange having excellent quality. The centrifugal casting method, which can produce such products with excellent quality, is rejected at the production site because it is difficult to produce and has a low productivity as compared with the sand casting method.
Further, when stainless steel used as a material of a mold required for general casting is cast as a typical heat-resistant steel, a suitable higher-grade heat-resistant steel is lacking. Therefore, since the mold is manufactured using a material used in general metal casting, and a refractory having a high heat-resistant temperature is provided (constructed) at a portion where the molten metal falls so that the molten metal does not directly fall into the mold, thereby preventing the mold from melting, maintenance such as repair and replacement of the refractory having a serious thermal damage frequently occurs, and manual operation is required, which causes a problem of inconvenience in operation.
Further, there are problems in that the quality and productivity of the product (stainless steel flange) are reduced, and the product cost and labor cost are increased.
Documents of the prior art
Patent document
Patent document 1: korean granted patent publication No. 10-1738313 (2017, 05, 22)
Patent document 2: korean laid-open patent publication No. 10-2009-0093006 (2009, 09 months and 02 days)
Patent document 3: korean granted patent publication No. 10-1609653 (2016, 04, 07/month)
Patent document 4: korean laid-open patent publication No. 10-2017-0116684 (2017, 10 and 20)
Disclosure of Invention
Technical problem
The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a centrifugal casting die assembly capable of producing a stainless steel flange having a dense structure and excellent quality without impurities, in which a plurality of levels of tensile force, tensile strength, and the like are close to those of a forged product.
It is still another object of the present invention to provide a centrifugal casting mold assembly which does not cause maintenance processes such as repair and replacement of refractory materials having a serious thermal damage, thereby greatly improving operability.
Another object of the present invention is to provide a centrifugal casting mold assembly that can save product costs and labor costs by producing a large number of products (stainless steel flanges).
Technical scheme
In order to achieve the above object, the present invention provides a centrifugal casting mold assembly comprising: a power generation device for generating a driving force; a power transmission device for transmitting the driving force generated by the power generation device; a shoe member 130 having a cylindrical shape with an open upper portion, a rotation shaft 132 fixedly attached to the upper surface of the shoe member, the rotation shaft 132 being driven to rotate by the power transmitted by the power transmission device; a die assembly 140 fixedly installed on an upper surface of the shoe member 130, and having a semicircular die part 144 attached to an outer peripheral edge of the molten metal distribution port 142 around the molten metal distribution port 142 at a central portion thereof; and a cap member 150 having a cylindrical shape with an open lower portion, and having a molten metal injection port 152 communicating with the molten metal distribution port 142 of the mold assembly 140 on an upper surface thereof.
According to the present invention, the molten metal distribution port 142 is formed in a cylindrical shape having an upper portion and a lower portion opened, and the molten metal 160 flowing in through the molten metal inlet 152 of the lid member 150 is distributed to each mold part 144 through the flow path P formed in the mold frame 144b of the mold part 144.
According to the present invention, in the mold part 144, a plurality of pairs of semicircular left and right partitions 144a are provided at equal intervals, a mold frame 144b is sequentially disposed between the partitions 144a, a plurality of circular protrusions 144a-2 for molding the cast product 170 are provided at equal intervals on the upper surface of the partitions 144a, a plurality of flow paths P having a C-shaped cross section for supplying the molten metal 160 are formed at equal intervals along the periphery of the upper surface of the mold frame 144b, and the flow paths P are connected to each other by a processing part 144b-2 having a V-shaped cross section.
ADVANTAGEOUS EFFECTS OF INVENTION
The centrifugal casting mold assembly of the present invention as described above has the following effects.
First, a stainless steel flange having a compact structure and excellent quality without impurities, in which the levels of tensile force, tensile strength, and the like are close to those of a forged product, can be produced by injecting molten metal.
Second, since an additional refractory is not required, a maintenance process such as repair or replacement of the refractory having a serious thermal damage is not generated, thereby greatly improving operability.
Thirdly, a large number of products (stainless steel flanges) can be produced by a one-time centrifugal casting method, thereby saving the product cost and the labor cost.
Drawings
Fig. 1 is a perspective view showing a centrifugal casting mold assembly according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view of the centrifugal casting mold assembly shown in fig. 1.
Fig. 3 is a plan view showing a separated state of the cover member of the present invention.
Fig. 4 is an exploded perspective view showing a mold assembly of the present invention.
Fig. 5 is a partially enlarged view of fig. 4.
Fig. 6 is a sectional view showing a state before molten metal is poured into the centrifugal casting mold assembly of the present invention.
Fig. 7 is a top perspective cross-sectional view showing the centrifugal casting mold assembly of the present invention in a state where molten metal is completely poured.
Fig. 8 is a partially enlarged view of fig. 7.
Fig. 9 is a diagram for explaining the structure of the centrifugal casting mold assembly according to the present invention.
Fig. 10 is a view showing a mold frame according to another embodiment of the present invention.
Detailed Description
Hereinafter, the centrifugal casting mold assembly according to the preferred embodiment of the present invention will be described in detail.
The terms or words used below should not be construed as being limited to general or dictionary meanings, but interpreted as having meanings and concepts conforming to the technical idea of the present invention on the basis of the principle that the inventor can appropriately define the concept of the terms for explaining the present invention through the best method.
Fig. 1 is a perspective view showing a centrifugal casting mold assembly according to an embodiment of the present invention, fig. 2 is an exploded perspective view of the centrifugal casting mold assembly shown in fig. 1, and fig. 3 is a plan view showing a separated state of a cover member of the present invention.
Fig. 4 is an exploded perspective view showing a mold assembly according to the present invention, fig. 5 is a partially enlarged view of fig. 4, and fig. 6 is a cross-sectional view showing a state before molten metal is poured into the centrifugal casting mold assembly according to the present invention.
Fig. 7 is a plan view in a cross-sectional view illustrating a state where the centrifugal casting mold assembly of the present invention is completely filled with molten metal, fig. 8 is a partially enlarged view of fig. 7, and fig. 9 is a view for explaining a structure of the centrifugal casting mold assembly of the present invention.
Referring to fig. 1 to 9, a centrifugal casting mold assembly 100 according to an embodiment of the present invention generally includes a power generation device, a power transmission device, a shoe member 130, a mold assembly 140, and a cover member 150.
Referring to fig. 9, the power generation device is configured to generate a driving force and includes a driving motor 110. The power transmission device transmits a driving force generated from the driving motor 110 to a rotation Shaft (SF)132, which will be described later, through a belt (or a chain) 120. That is, since the belt 120 is connected between the driving wheel provided on the motor shaft of the driving motor 110 and the driven wheel provided on the rotation Shaft (SF)132, the driving force generated by the operation of the driving motor 110 is transmitted to the rotation Shaft (SF)132 through the belt 120, and the rotation shaft is rotated at a high speed (about 300 to 3000 rpm).
Referring to fig. 1 and 2, the shoe member 130 is formed in a cylindrical shape with an open upper portion, and a mold assembly 140, which will be described later, is installed and supported on the upper surface, and a rotation shaft 132 is fixedly attached to the center portion of the bottom surface.
In the present invention, the rotation shaft 132 for rotating the shoe member 130 is horizontal (transverse type) and is suitable for casting long pipes such as cast iron pipes.
Referring to fig. 2 to 7, the die assembly 140 is fixedly installed on the upper surface of the shoe member 130, and a semicircular die part 144 is attached to the outer periphery of the molten metal distribution opening, centering on the molten metal distribution opening 142 at the center.
The molten metal distribution port 142 is formed in a cylindrical shape with an upper portion and a lower portion opened, and communicates with a molten metal injection port 152 of a lid member 150 described later, and distributes the molten metal 160 flowing in through the molten metal injection port to each mold portion 144 through a flow path P formed in a mold frame 144b described later.
In this case, the molten metal distribution port 142 is formed with a plurality of through holes 142a having a rectangular shape in the longitudinal direction from one end portion at equal intervals, and the molten metal 160 is supplied to the flow path P positioned in each mold frame 144b through the through holes 142 a.
Referring to fig. 2 and 3, a plurality of pairs of semicircular left and right spacers 144a having a predetermined thickness are provided at equal intervals in the mold part 144, and a mold frame 144b is sequentially disposed between the spacers 144 a.
In this case, a plurality of bolt holes 144a-1 are formed at equal intervals along the circumference of the upper surface of the partition plate 144a, spaced apart from the bolt holes 144a-1 by a predetermined interval, and a plurality of circular protrusions 144a-2 for molding the cast product 170 are formed at equal intervals on the upper surface of the partition plate 144 a.
The mold frame 144b is used for manufacturing the cast product 170, has a semicircular shape having the same predetermined thickness as the partition plate 144a, and has a plurality of bolt holes 144b-1 communicating with the bolt holes 144a-1 of the partition plate 144a at equal intervals along the periphery of the upper surface, and the partition plate 144a and the mold frame 144b are detachably connected to each other by bolt members 180 penetrating the bolt holes 144a-1 and 144 b-1.
In this case, it is preferable that the partition plates 144a placed on the mold frame 144b are stacked such that the cut line 144a-3 of the center portion thereof is 90 degrees to the cut line 144b-3 of the center portion of the mold frame 144b, and the mold frame 144b is formed with a plurality of flow paths P having a substantially C-shaped cross section for supplying the molten metal 160 at regular intervals along the periphery of the upper surface so as to be spaced apart from the bolt holes 144b-1 by a predetermined distance, and the flow paths P are connected to each other by the processing portions 144b-2 having a substantially V-shaped cross section.
Referring to fig. 5, it is shown that a quadrangular hole 172 is formed in the center portion of the cast product 170 after the cast product 170 is separated from the mold frame 144 b.
Referring to fig. 1 and 2, the cap member 150 is formed in a cylindrical shape with an open lower portion, and a molten metal injection port 152 having a predetermined inner diameter is formed at a central portion of an upper surface thereof to communicate with the molten metal distribution port 142 of the mold assembly 140, and the cap member 150 is detachably coupled to an upper end portion of the shoe member 130.
On the other hand, fig. 10 is a view showing a mold frame of another embodiment of the present invention. Referring to fig. 10, each of the mold frames 244b has a right triangle shape having a predetermined thickness, a pair of the mold frames 244b are connected to each other to form a quadrangle, a plurality of bolt holes 244b-1 are formed at equal intervals along the circumference of the upper surface, a plurality of flow paths P having a substantially C-shaped cross section for supplying the molten metal 160 are formed at equal intervals along the circumference of the upper surface so as to be spaced apart from the bolt holes 244b-1 by a predetermined distance, the flow paths P are connected to each other by a processing portion 244b-2 having a substantially Y-shaped cross section, and a reference numeral 244b-3 which is not described in fig. 10 is a cut-off line.
The operation of the present invention having the above-described structure will be described below.
Referring to fig. 6 to 9, when a mold product such as a stainless flange is manufactured using the centrifugal casting mold assembly 100 of the present invention, the cover member 150 is gradually lowered from the upper portion of the shoe member 130 to be coupled to the upper end portion of the shoe member 130.
Then, the driving force generated by the driving motor 110 is transmitted to the rotating shaft 132 through the belt 120, and the rotating shaft and the shoe member 130 are rotated at a high speed in one direction (about 300 to 3000 rpm).
In this state, when the molten stainless steel 160 is introduced through the molten metal inlet 152, the molten metal 160 flows into the mold frames 144b through the through holes 142a of the molten metal distribution port 142 and the flow paths P by centrifugal force that rotates at a high speed, and after the molten metal 160 is completely injected, the fastening state of the bolt member 180 is released after a predetermined time has elapsed, so that the partition plates 144a are separated from the mold portions 144, and then a plurality of cast products 170 are obtained from the mold frames 144 b.
After the cast product 170 as described above is released from the mold part 144, a plurality of bolt holes are formed in an edge portion or a stainless flange having a through hole with the same inner diameter as the pipe body is formed in a central portion through an additional machining process as necessary.
According to the present invention, in the above process, it is possible to produce a plurality of stainless steel flanges having a level of tensile force, tensile strength, etc. close to that of a forged product, a dense structure, and excellent quality without impurities by injecting molten metal.
Further, since an additional refractory is not required, a maintenance process such as repair or replacement of the refractory having a serious thermal damage is not generated, thereby greatly improving the operability. .
Moreover, a large number of products (stainless steel flanges) can be produced in a one-time centrifugal casting mode, so that the product cost and the labor cost can be saved.
As described above, the centrifugal casting mold assembly according to the present invention has been described with reference to the drawings, but it is obvious that the present invention is not limited to the embodiments and drawings described in the present specification, and those skilled in the art to which the present invention pertains can implement various modifications within the technical spirit of the present invention.
Description of reference numerals
100: centrifugal casting mold assembly 110: driving motor
120: belt 130: bottom bracket component
132: rotation shaft 140: mold assembly
142: molten metal distribution opening 144: mold part
144 a: partition plate 144 b: mold frame
150: cover member 152: molten metal injection port
160: molten metal 170: cast product
180: bolt member P: flow path
Claims (3)
1. A centrifugal casting mold assembly, comprising:
a power generation device for generating a driving force;
a power transmission device for transmitting the driving force generated by the power generation device;
a shoe member (130) having a cylindrical shape with an open upper part, a rotating shaft (132) being fixedly attached to the upper surface of the shoe member, the rotating shaft (132) being driven to rotate by the power transmitted by the power transmission device;
a die assembly (140) fixedly provided on the upper surface of the shoe member (130), and having a semicircular die portion (144) attached to the outer periphery of the molten metal distribution opening (142) around the molten metal distribution opening (142) at the center thereof; and
and a cover member (150) having a cylindrical shape with an open lower portion, and provided with a molten metal injection port (152) on an upper surface thereof, the molten metal injection port being communicated with the molten metal distribution port (142) of the mold assembly (140).
2. The centrifugal casting mold assembly according to claim 1, wherein the molten metal distribution port (142) is formed in a cylindrical shape having an upper portion and a lower portion opened, and the molten metal (160) flowing in through the molten metal injection port (152) of the cover member (150) is distributed to each mold portion (144) through a flow path (P) formed in a mold frame (144b) of the mold portion (144).
3. The centrifugal casting mold assembly according to claim 1,
in the mold part (144), a pair of semicircular left and right partition plates (144a) are provided in a plurality of pairs at equal intervals, a mold frame (144b) is sequentially arranged between the partition plates (144a),
a plurality of circular protrusions (144a-2) for molding a cast product (170) are provided at equal intervals on the upper surface of the partition plate (144a),
a plurality of flow paths (P) having a C-shaped cross section for supplying molten metal (160) are formed at equal intervals along the periphery of the upper surface of the die frame (144b), and the flow paths (P) are connected to each other by a processing portion (144b-2) having a V-shaped cross section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2019-0058444 | 2019-05-18 | ||
| KR1020190058444A KR102096758B1 (en) | 2019-05-18 | 2019-05-18 | Assembly for centrifugal casting mold |
| PCT/KR2020/003584 WO2020235793A1 (en) | 2019-05-18 | 2020-03-16 | Centrifugal casting mold assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113766981A true CN113766981A (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080032554.3A Pending CN113766981A (en) | 2019-05-18 | 2020-03-16 | Centrifugal casting mold assembly |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR102096758B1 (en) |
| CN (1) | CN113766981A (en) |
| WO (1) | WO2020235793A1 (en) |
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| JP2000233268A (en) * | 1999-02-16 | 2000-08-29 | Kubota Corp | Metallic mold for centrifugal casting of tube with flange having hole as cast |
| KR20020037429A (en) * | 2000-11-14 | 2002-05-21 | 이달영 | Apparatus for casting a blank of stainless steel pipe flange |
| KR100817546B1 (en) * | 2006-11-09 | 2008-03-27 | 정태우 | A centrifugal casting apparatus |
| KR20080101178A (en) * | 2007-05-16 | 2008-11-21 | 김부윤 | A centrifugal casting apparatus |
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| CN107088651A (en) * | 2017-07-10 | 2017-08-25 | 太极重工股份有限公司 | Multiple-piece centrifugal casting flange mould |
| CN108057865A (en) * | 2017-12-12 | 2018-05-22 | 李进敏 | Casting device and casting method thereof |
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| JPH08206807A (en) * | 1995-02-06 | 1996-08-13 | Mitsubishi Materials Corp | Metallic mold for centrifugal casting |
| JP2008126313A (en) * | 2006-11-21 | 2008-06-05 | Honda Seiki Kk | Rotary mold of centrifugal casting machine for rapid solidification |
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| KR101121779B1 (en) * | 2010-07-27 | 2012-07-12 | 한국피아이엠(주) | Apparatus and method for centrifugal casting |
| KR101609653B1 (en) | 2014-10-29 | 2016-04-07 | 한국생산기술연구원 | Centrifugal Casting Method |
| KR101542457B1 (en) * | 2015-06-02 | 2015-08-12 | 최창호 | Mold Locking Device For Centrifugal Casting Machine |
| KR20170116684A (en) | 2016-04-12 | 2017-10-20 | 주식회사 퓨쳐캐스트 | Centrifugal casting apparatus and method for fabricating casting product |
| KR101738313B1 (en) | 2016-10-04 | 2017-05-22 | 유세권 | Centrifugal casting mold |
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2019
- 2019-05-18 KR KR1020190058444A patent/KR102096758B1/en active IP Right Grant
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2020
- 2020-03-16 WO PCT/KR2020/003584 patent/WO2020235793A1/en active Application Filing
- 2020-03-16 CN CN202080032554.3A patent/CN113766981A/en active Pending
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| JP2000233268A (en) * | 1999-02-16 | 2000-08-29 | Kubota Corp | Metallic mold for centrifugal casting of tube with flange having hole as cast |
| KR20020037429A (en) * | 2000-11-14 | 2002-05-21 | 이달영 | Apparatus for casting a blank of stainless steel pipe flange |
| KR100817546B1 (en) * | 2006-11-09 | 2008-03-27 | 정태우 | A centrifugal casting apparatus |
| KR20080101178A (en) * | 2007-05-16 | 2008-11-21 | 김부윤 | A centrifugal casting apparatus |
| CN104426306A (en) * | 2013-09-06 | 2015-03-18 | 现代重工业株式会社 | Centrifugal casting machine for manufacturing rotor |
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| CN108057865A (en) * | 2017-12-12 | 2018-05-22 | 李进敏 | Casting device and casting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102096758B1 (en) | 2020-04-02 |
| WO2020235793A1 (en) | 2020-11-26 |
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