KR950003990Y1 - Simplicity molding equipment of co2 gas curing type - Google Patents

Simplicity molding equipment of co2 gas curing type Download PDF

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Publication number
KR950003990Y1
KR950003990Y1 KR2019930001753U KR930001753U KR950003990Y1 KR 950003990 Y1 KR950003990 Y1 KR 950003990Y1 KR 2019930001753 U KR2019930001753 U KR 2019930001753U KR 930001753 U KR930001753 U KR 930001753U KR 950003990 Y1 KR950003990 Y1 KR 950003990Y1
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gas
mold
model
curing type
molding apparatus
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KR2019930001753U
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Korean (ko)
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KR940020322U (en
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장계순
전철진
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대우중공업 주식회사
이경훈
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
    • B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
    • B22C1/188—Alkali metal silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C17/00—Moulding machines characterised by the mechanism for separating the pattern from the mould or for turning over the flask or the pattern plate

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Casting Devices For Molds (AREA)

Abstract

내용 없음.No content.

Description

CO2가스경화형 간이 조형장치CO2 Gas Hardening Type Molding Device

제1도는 본 고안의 조형장치 평면도.1 is a plan view of the molding apparatus of the present invention.

제2도는 본 고안의 조형장치 측면도.2 is a side view of the molding apparatus of the present invention.

제3도는 제2도 "A"부의 확대단면도.3 is an enlarged cross-sectional view of a portion “A” of FIG. 2.

제4도는 종래의 CO2주형 제작방법의 설명도.4 is an explanatory diagram of a conventional method for producing a CO 2 mold.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 프레임 12 : 모형정반10 frame 12 model plate

14 : 스크린 15 : 가스취입구14: screen 15: gas inlet

16 : 주형압출핀 18 : 진동자16: mold extrusion pin 18: vibrator

21 : 모형 22 : 가스챔버21: Model 22: gas chamber

30 : 주형상자(flask)30: flask

본 고안은 주철, 주강 또는 비철주물의 제조를 위한 CO2가스경화형 간이 조형장치에 관한 것이다.The present invention relates to a simple CO 2 gas hardening apparatus for the production of cast iron, cast steel or non-ferrous castings.

일반적으로 규산소다계 점결제를 이용하는 가스경화형 주형은 주형제작비가 다른 조형방법에 비하여 값이 저렴하고, 주형내에 가스취입에 의해 신속히 경화반응이 일어나므로 조형속도가 빠르며, 무기계 점결제를 사용하므로 주형강도가 높고, 주조시 용량에 의한 주형의 변형이 적어 제품의 치수안정성이 높은 장점을 갖는다.In general, gas-curable molds using sodium silicate-based binders are cheaper than other molding methods, and the curing speed is rapid due to gas injection into the molds. High strength, less deformation of the mold due to the capacity during casting, has the advantage of high dimensional stability of the product.

종래의 조형법은 제4도에 도시된 바와 같이 모형정반(12)위에 위치된 주형상자(30)에 모형(21)과 주물사를 이용하여 조형한 주형의 상부에 가스공급파이프(40)와 연결된 다수의 고무튜브(tube)(42) 선단부를 찔러 넣어 주형에 CO2가스를 취입하도록 하고있다. 이같이 고무튜브(42)를 이용하여 주형에 CO2가스를 취입시에는 CO2가스의 유실방지를 위해 주형에 찔러 넣어진 고무튜브(42) 주위에 모래를 둔 덕지게 쌓게 되는 바, 이에 따른 작업을 필요로 하여 시간낭비요소가 발생될 뿐더러 CO2가스의 주입압력에 고무튜브(42)가 삽입된 주형의 주위에는 국부적으로 파손이 발생되어 CO2가스의 일부가 밖으로 새어나가 주형내의 각 부위에 균일한 경화가스의 공급이 어렵고, 이에 따라 주형의 강도도 불균일해져 조형된 주형을 모형(pattern)(21)으로부터 탈형시 주형변형을 일으킬 우려가 있다. 결국 종래의 조형법에 의하면 주형의 강도가 부위별로 달라지며, 주물의 치수정밀도의 관리가 어렵게 되는 문제점이 있었다.The conventional molding method is connected to the gas supply pipe 40 to the upper part of the mold formed by using the model 21 and the molding sand in the mold box 30 located on the model surface 12 as shown in FIG. A number of rubber tubes 42 are inserted into the ends of the mold to blow CO 2 gas into the mold. When the CO 2 gas is blown into the mold using the rubber tube 42 as described above, sand is piled up around the rubber tube 42 inserted into the mold to prevent the loss of the CO 2 gas. a Not only is the time waste generated needs around the insert mold the rubber tube 42 to the injection pressure of the CO 2 gas has been generated it is locally broken by each site in the exit part of the CO 2 gas leaking out of the mold It is difficult to supply uniform cured gas, and thus, the strength of the mold is also uneven, which may cause mold deformation when the molded mold is removed from the pattern 21. As a result, according to the conventional molding method, there is a problem that the strength of the mold is different for each part, and management of the dimensional accuracy of the casting becomes difficult.

본 고안은 상기의 문제점을 감안하여 창안한 것으로, 가스경화형 주형 제작시, 주형전체에 균일하게 경화가스인 CO2가스를 불어 넣을 수 있도록 하여 균일한 주형강도를 얻도록 하며, 진동자를 사용하여 조형후 모형으로부터 용이하게 주형을 분리할 수 있도록 하므로써 보다 견고하고 균일한 주형을 제작할 수 있게 하는 CO2가스경화형 간이 조형장치를 제공하는데 그 목적이 있다.The present invention was devised in view of the above problems, and when manufacturing a gas-curable mold, it was possible to blow CO 2 gas, which is a hardening gas uniformly, into the entire mold to obtain uniform mold strength, It is an object of the present invention to provide a CO 2 gas-curable simple molding apparatus that can make a mold more robust and uniform by allowing the mold to be easily separated from a later model.

이하, 본 고안의 바람직한 실시예를 첨부된 도면에 의해 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings a preferred embodiment of the present invention as follows.

제1도 내지 제3도에 도시된 바와 같이 프레임(10)상의 상부에 모형정반(12)이 설치되고, 이 모형정반(12)은 모래칩입방지용 스크린(14)이 구비된 다수의 가스취입구(15)가 형성되고, 전후 4개 부위에 주형 압출핀(16)이 형성된다. 그리고 모형정반(12) 하부에는 주형에 CO2가스를 취입하도록 밸브(17)를 갖춘 배관(19)과 연결된 가스챔버(22)가 설치되고, 이 가스챔버(22)의 측면에는 주형에 진동을 부여하기 위한 진동자(18)가 설치된다. 또한 상기 주형압출핀(16)은 공압밸브(20)를 매개로 승강동작하는 공압실린더(26)상에 장착된 압출판(24)과 연결되어 있다. 한편 프레임(10)의 하부에 간이 조형장치의 이동을 가능하게 하는 바퀴(28)가 설치되어 구성된다.As shown in Figs. 1 to 3, a model surface plate 12 is installed on the upper portion of the frame 10, and the model surface plate 12 has a plurality of gas inlets provided with a screen for preventing sand chipping. 15 is formed, and the mold extrusion pin 16 is formed in four parts before and behind. In addition, a gas chamber 22 connected to a pipe 19 having a valve 17 is installed at a lower portion of the model plate 12 so as to blow CO 2 gas into the mold, and the side of the gas chamber 22 vibrates the mold. The vibrator 18 for giving is provided. In addition, the mold extrusion pin 16 is connected to the extrusion plate 24 mounted on the pneumatic cylinder 26 to move up and down through the pneumatic valve (20). On the other hand, the wheel 28 is provided in the lower portion of the frame 10 to enable the movement of the simple molding apparatus.

상기와 같은 구성에 따르면 모형정반(12)위에 주형상자(30)를 위치시키고 규산소다를 점결제로 사용하여 혼련된 주물사를 주형상자(30)에 투입하여 조형을 실시한 후, 진동자(18)를 수 초간 작동시켜 주물사와 모형(21)사이에 탈형성(脫型性)을 부여한 다음, 가스챔버(22)내로 경화용가스를 불어 넣으면 가스취입구(15)로부터 공급되는 경화가스가 가스취입구(15)를 통과하여 주형내로 신속히 취입되어 경화반응이 시작된다.According to the configuration as described above, after placing the mold box 30 on the model surface 12 and using the silicate as a caking agent, the kneaded molding sand is put into the mold box 30 to perform the molding, and then the vibrator 18 After operating for a few seconds to impart deforming property between the foundry sand and the model 21, and blowing the curing gas into the gas chamber 22, the curing gas supplied from the gas inlet 15 is a gas inlet. After passing through (15), it is rapidly blown into the mold to start the curing reaction.

이와 같은 상태를 일정시간동안(약 10초) 유지후 주형의 경화반응이 완료되면, 진동자(18)를 작동시켜 주물사와 모형(21)사이에 탈형성을 부여한 뒤, 공압실린더(26)를 동작시켜 압출판(24)을 매개로 주형압출핀(16)을 상승시키면 경화된 주형이 모형(21)으로부터 분리, 상승하게 되고 모형(21)만이 모형정반(12)상에 남게된다.After maintaining the state for a predetermined time (about 10 seconds), when the curing reaction of the mold is completed, the oscillator 18 is operated to impart deforming between the foundry sand and the model 21, and then operate the pneumatic cylinder 26. By raising the mold extrusion pin 16 through the extrusion plate 24, the cured mold separates and rises from the model 21, and only the model 21 remains on the model surface 12.

상기에서 주형의 경화속도는 규산소다의 몰농도, 결정수의 양, 가스의 취입압력 및 유량에 따라 달라지므로 요구되는 주형경도의 조건에 따라 적절하게 조정하는 것이 바람직하다.Since the curing rate of the mold depends on the molar concentration of sodium silicate, the amount of crystal water, the blowing pressure and the flow rate of the gas, it is preferable to adjust the mold appropriately according to the required mold hardness conditions.

한편 모형정반(12)에 다수 천공된 가스취입구(15)는 주물제품의 형상 및 크기에 따라 그 수는 증감되고, 또 적절한 위치에 천공되는 것이다.On the other hand, the number of gas inlets 15 perforated in the model surface 12 is increased or decreased depending on the shape and size of the cast product, and is drilled in a proper position.

이상에서와 같이 본 고안에 의한 조형장치는 모형정반에 형성된 가스취입구에 의해 주형에 국부적 손상을 가하지 않고 주형에 균일한 경화가스를 불어 넣어 전체 주형내의 균일한 경화반응을 얻을 수 있어 주형의 치수안정성을 좋게 하고, 조형시 진동자에 의해 진동을 가하므로 주형의 경화후에 탈형을 용이하게 하며, 경화가스의 국부적 오버 블로잉(over blowing)의 방지가 가능하며, 조형작업의 기계화에 의한 작업효율의 증가로 주형의 생산성을 높일 수 있으며, 바퀴에 의해 조형장치의 이동이 가능하므로 공간활용의 효율성을 기대할 수 있는 것이다.As described above, the molding apparatus according to the present invention can obtain a uniform curing reaction in the entire mold by injecting a uniform curing gas into the mold without locally damaging the mold by the gas inlet formed in the model plate. It improves stability, and vibrates by the vibrator during molding, which facilitates demolding after hardening of the mold, prevents local over blowing of the hardening gas, and increases work efficiency by mechanization of the molding work. The productivity of the mold can be increased, and the molding apparatus can be moved by the wheels, so the efficiency of space utilization can be expected.

Claims (2)

모형정반(12)상에 모형(21)과 주물사를 이용하여 조형한 주형에 CO2가스를 취입시키는 조형장치에 있어서, 프레임(10) 상부에 설치된 모형정반(12)에 모래침입방지용 스크린(14)이 구비된 다수의 가스취입구(15)를 형성하고, 모형정반(12)의 하부에는 주형에 CO2가스를 취입하도록 밸브(17)를 갖춘 배관(19)과 연결된 가스 챔버(22)를 설치하고, 모형정반(12)의 전후에 다수의 주형압출핀(16)을 형성하고 이를 공압밸브(20)를 매개로 승강동작되는 공압실린더(26)상에 장착된 압출핀(24)과 연결한 것을 특징으로 하는 CO2가스경화형 간이 조형장치.In the molding apparatus for blowing CO 2 gas into the mold formed by using the model 21 and the molding sand on the model surface 12, the screen 14 for preventing sand intrusion into the model surface 12 installed on the frame 10. ) And a plurality of gas inlets 15 provided with a gas chamber 22 connected to a pipe 19 having a valve 17 so as to blow CO 2 gas into the mold. And a plurality of mold extrusion pins 16 before and after the model plate 12 and connected to the extrusion pins 24 mounted on the pneumatic cylinders 26 which are lifted and operated by the pneumatic valve 20. CO 2 gas curing type simple molding apparatus characterized in that. 제1항에 있어서, 상기 가스챔버(22)의 측면에는 주형에 진동을 부여하기 위한 진동자(18)를 설치한 것을 특징으로 하는 CO2가스경화형 간이 조형장치.2. The CO 2 gas-curable simple molding apparatus as claimed in claim 1, wherein a vibrator (18) is provided on a side surface of the gas chamber (22) to impart vibration to the mold.
KR2019930001753U 1993-02-10 1993-02-10 Simplicity molding equipment of co2 gas curing type KR950003990Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019930001753U KR950003990Y1 (en) 1993-02-10 1993-02-10 Simplicity molding equipment of co2 gas curing type

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Application Number Priority Date Filing Date Title
KR2019930001753U KR950003990Y1 (en) 1993-02-10 1993-02-10 Simplicity molding equipment of co2 gas curing type

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KR940020322U KR940020322U (en) 1994-09-15
KR950003990Y1 true KR950003990Y1 (en) 1995-05-18

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