KR20030004198A - Drug tank for fire extinguisher and manufacturing method thereof - Google Patents

Drug tank for fire extinguisher and manufacturing method thereof Download PDF

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Publication number
KR20030004198A
KR20030004198A KR1020020073259A KR20020073259A KR20030004198A KR 20030004198 A KR20030004198 A KR 20030004198A KR 1020020073259 A KR1020020073259 A KR 1020020073259A KR 20020073259 A KR20020073259 A KR 20020073259A KR 20030004198 A KR20030004198 A KR 20030004198A
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KR
South Korea
Prior art keywords
inlet
fire extinguisher
forming
tank
valve
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KR1020020073259A
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Korean (ko)
Inventor
이성형
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이성형
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Priority to KR1020020073259A priority Critical patent/KR20030004198A/en
Publication of KR20030004198A publication Critical patent/KR20030004198A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/206—Deep-drawing articles from a strip in several steps, the articles being coherent with the strip during the operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/28—Associations of cutting devices therewith
    • B21D43/287—Devices for handling sheet or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/08—Making helical bodies or bodies having parts of helical shape internal screw-threads

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

PURPOSE: An agent tank for fire extinguisher is formed integrally to prevent erosion by the extinguishing agent and leakage of the extinguishing agent stored in the agent tank. CONSTITUTION: A valve(20) with an injection hose is connected to upper part of an agent tank. A handle with a hinge pin is installed in the upper part of the valve to inject the extinguishing agent of the fire extinguisher. The agent tank is formed of a body(11) of cylindrical shape and an inlet portion(12) in upper part of the body. The body has some capacity to store the extinguishing agent. The inlet portion is formed in upper end of the body to connect the valve. A screw(12a) is formed inside of the inlet portion. An O-ring is inserted to the connection part of the valve.

Description

소화기용 약제탱크 및 그 제조방법{DRUG TANK FOR FIRE EXTINGUISHER AND MANUFACTURING METHOD THEREOF}Chemical tank for fire extinguisher and its manufacturing method {DRUG TANK FOR FIRE EXTINGUISHER AND MANUFACTURING METHOD THEREOF}

본 발명은 소화기용 약제탱크 및 그 제조방법에 관한 것으로, 특히 약제탱크를 일체로 형성하여 소화액으로 인한 부식 등을 방지할 수 있도록 한 것이다.The present invention relates to a pharmaceutical tank for a fire extinguisher and a method for manufacturing the same, in particular to form a pharmaceutical tank integrally to prevent corrosion due to the digestive fluid.

일반적으로 소화기는 건물이나 차량 등에 비치되어 화재발생시 신속하게 소화시킬 수 있도록 한 것이다.In general, a fire extinguisher is provided in a building or a vehicle so as to extinguish a fire quickly.

이와 같은 소화기는 도 1에 도시된 바와 같이, 원통형 약제탱크(1)를 가지고 있으며, 이 약제탱크(1) 내에는 통상 탄산수소나트륨으로 이루어진 소화용 분말가루(D)가 질소나 이산화탄소 등의 압축가스(G)와 함께 수용되어 있다. 따라서, 화재발생시에는 상기 질소나 이산화탄소의 고압가스에 의해 분말가루가 방사되어 화재를 진압하게 되는 것이다.Such a fire extinguisher, as shown in Figure 1, has a cylindrical chemical tank (1), in the chemical tank (1) is usually digested powder (D) made of sodium hydrogen carbonate is compressed such as nitrogen or carbon dioxide It is housed together with the gas G. Therefore, when a fire occurs, powder powder is radiated by the high pressure gas of nitrogen or carbon dioxide to extinguish the fire.

그런데, 종래의 약제탱크(1)는 강판으로 이루어진 상부몸체(2)와 하부몸체(3), 그리고 상부몸체(2)와 밸브(5)가 결합되는 금속파이프로 이루어진 입구부(4)를 각각 용접하여 밀폐 결합시키는데, 이와 같은 경우 약제탱크(1) 내부에 저장된 소화액에 의해 용접부위(W)가 부식될 우려가 있으며, 이로 인해 내부에 저장된 소화액이 누출되어 소화기 주변의 또다른 물건 등을 부식시킴과 아울러 그로 인해 화재를 유발시킬 우려가 있었다.By the way, the conventional chemical tank (1) has an upper body (2) and the lower body (3) made of a steel plate, and the inlet portion (4) made of metal pipes to which the upper body (2) and the valve (5) are coupled, respectively. In this case, the welding part (W) may be corroded by the extinguishing liquid stored in the chemical tank (1). This causes the extinguishing liquid stored inside to leak and corrode another object around the extinguisher. And there was a risk of causing a fire.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 약제탱크를 일체로 형성하여 소화액으로부터의 부식 등을 방지할 수 있도록 한 소화기용 약제탱크 및 그 제조방법을 제공하는데 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a chemical tank for a fire extinguisher and a method of manufacturing the same so that the pharmaceutical tank is integrally formed to prevent corrosion from the extinguishing fluid.

도 1은 종래 기술에 의한 소화기용 약제탱크를 보인 종단면도.1 is a longitudinal sectional view showing a chemical tank for a fire extinguisher according to the prior art.

도 2는 본 발명에 의한 소화기용 약제탱크를 보인 종단면도.Figure 2 is a longitudinal sectional view showing a chemical tank for fire extinguisher according to the present invention.

도 3a 내지 도 3f는 본 발명에 의한 소화기용 약제탱크의 제조단계를 순차적으로 보인 도면.Figure 3a to 3f is a view showing sequentially the manufacturing step of the pharmaceutical tank for fire extinguisher according to the present invention.

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

10 ; 약제탱크11 ; 몸체부10; Chemical tank 11; Body

12 ; 입구부12a ; 나사산12; Inlet 12a; Thread

20 ; 밸브20; valve

상기 목적을 달성하기 위한 본 발명은, 냉간압연강판을 적당한 길이로 절단하는 강판절단단계와, 절단된 강판을 다단계로 드로잉하여 소화약제가 내장되도록 몸체부를 가공하는 몸체형성단계와, 상기 몸체부의 상단을 스피닝하여 밸브가 결합되도록 입구부를 축관 형성하는 입구형성단계와, 상기 축관된 입구부의 내주면에밸브가 대응 결합되도록 나사산을 형성하는 나사가공단계로 이루어지는 것을 특징으로 한다.The present invention for achieving the above object is, a steel sheet cutting step of cutting the cold rolled steel sheet to a suitable length, the body forming step of processing the body portion so that the extinguishing agent is built by drawing the cut steel sheet in multiple stages, the upper end of the body portion Spinning to form an inlet forming step of forming an inlet tube to the valve coupled, and the screw processing step of forming a screw thread so that the valve is coupled to the inner peripheral surface of the inlet portion.

이하, 본 발명에 의한 소화기용 약제탱크 및 그 제조방법을 첨부 도면에 도시된 실시예에 따라 설명하면 다음과 같다.Hereinafter, the pharmaceutical tank for a fire extinguisher according to the present invention and a manufacturing method thereof will be described according to the embodiment shown in the accompanying drawings.

도 2는 본 발명에 의한 소화기를 개략적으로 보인 단면도로서, 본 발명의 소화기는 약제탱크(10)의 상부에 분사호스를 구비한 밸브(20)가 결합되고, 상기 밸브(20)의 상부에는 도시되지 않은 힌지핀을 매개로 회동 가능하게 손잡이를 설치하여 약제탱크(10) 내에 저장된 소화액을 분출할 수 있도록 구성된다.2 is a cross-sectional view schematically showing a fire extinguisher according to the present invention, the fire extinguisher of the present invention is coupled to the valve 20 having a spray hose on the upper portion of the chemical tank 10, the upper portion of the valve 20 is shown It is configured to eject the extinguishing fluid stored in the medicine tank 10 by installing a handle rotatably via a hinge pin that is not.

상기 약제탱크(10)는 산성 또는 알칼리성 소화약제를 내장하는 냉간압연강판(S)으로 제작되는 것으로, 이러한 약제탱크(10)는 대략 원통형으로 이루어진 몸체부(11)와, 이 몸체부(11)의 상부에 위치되는 입구부(12)로 구성된다.The pharmaceutical tank 10 is made of a cold rolled steel sheet (S) containing an acidic or alkaline fire extinguishing agent, the pharmaceutical tank 10 is a body portion 11 made of a substantially cylindrical, and the body portion 11 It consists of an inlet 12 located at the top of the.

상기 몸체부(11)는 소화약제가 저장되도록 소정의 내용적을 가지며, 상단이 만곡지도록 대략 원통형의 구조를 가진다.The body portion 11 has a predetermined content to store the extinguishing agent, and has a substantially cylindrical structure so that the upper end is curved.

상기 입구부(12)는 몸체부(11)의 상단에 밸브(20)가 결합되도록 축관 형성되는 것으로, 그 내주면에는 나사산(12a)이 형성되며, 밸브(20)가 결합되는 부위에는 오링(도시 생략)이 삽입된다.The inlet portion 12 is formed with a shaft tube so that the valve 20 is coupled to the upper end of the body portion 11, the thread 12a is formed on the inner circumferential surface, O-ring (shown in the portion where the valve 20 is coupled) Is omitted).

상기 몸체부(11) 및 입구부(12)는 드로잉 및 스피닝단계를 거쳐 일체로 형성됨으로써 기존의 용접부위에 소화액이 접촉될 경우 부식의 위험성이 내포된 소화기의 위험을 방지할 수 있게 된다.The body part 11 and the inlet part 12 are integrally formed through a drawing and spinning step, thereby preventing a fire extinguisher containing a risk of corrosion when the extinguishing fluid contacts an existing welding part.

도 3a 내지 도 3g는 본 발명에 의한 소화기용 약제탱크의 제조단계를 순차적으로 보인 것으로, 본 발명의 약제탱크(10)는 원소재 강판(S)을 적당한 길이로 절단하는 강판절단단계와, 절단된 강판(S)을 다단계로 드로잉하여 원통형의 몸체부(11)를 형성하는 몸체형성단계와, 몸체부(11)의 상측을 스피닝하여 축관함으로써 입구부(12)를 형성하는 입구형성단계와, 상기 축관된 입구부(12)에 나사산(12a)을 형성하는 나사가공단계를 거쳐 제조된다.Figure 3a to 3g is shown sequentially the manufacturing step of the chemical tank for fire extinguisher according to the present invention, the pharmaceutical tank 10 of the present invention is a steel sheet cutting step for cutting the raw material steel sheet (S) to a suitable length, and cutting A body forming step of forming the cylindrical body portion 11 by drawing the drawn steel plate S in multiple stages, and an inlet forming step of forming the inlet portion 12 by spinning the upper side of the body portion 11 and condensing it; It is manufactured through a screw processing step of forming a screw thread (12a) in the conduit inlet 12.

상기 강판절단단계는, 도 3a와 같이, 약제탱크(10)를 제조하기 위한 냉간압연강판(S)을 적당한 길이로 절단하는 것으로, 블랭킹 가공방식에 따라 진행된다.The steel plate cutting step, as shown in Figure 3a, to cut the cold rolled steel sheet (S) for the manufacture of the drug tank 10 to a suitable length, it proceeds in accordance with the blanking method.

상기 몸체형성단계는, 도 3b 내지 도 3d와 같이, 복동유압프레스(도시 생략)를 이용하여 강판(S)을 상방향 및 하방향에서 반복적으로 드로잉하여 일측면이 개구된 원통 형상의 몸체부(11)를 형성하는 것으로, 몸체부(11)는 블랭킹된 강판(S)을 1차로 정방향 드로잉하고 2차로 역방향 드로잉한 후 강판(S)의 불필요한 부분을 절단하는 트리밍공정을 반복적으로 진행하여 성형된다.The body forming step, as shown in Figure 3b to 3d, by using a double-acting hydraulic press (not shown) to repeatedly draw the steel sheet (S) in the upward and downward directions, the cylindrical body portion of which one side is opened ( 11), the body portion 11 is formed by repeatedly performing the trimming process of cutting unnecessary portions of the steel sheet S after the blanked steel sheet S is first drawn forward and secondly drawn backward. .

상기 입구형성단계는, 도 3e와 같이, 드로잉하여 소정의 내용적을 가진 몸체부(11)가 형성된 약제탱크(10)의 상단부의 직경을 축소시켜 밸브(20)가 결합되도록 입구부(12)를 형성하는 것으로, 도시되지 않은 가공롤러를 이용하여 몸체부(11)의 상단을 내측으로 라운딩되도록 스피닝함과 아울러 입구부(12)에 해당되는 부위에 이르러서는 대략 수직으로 스피닝함으로써 몸체부(11)의 상단 중앙에 입구부(12)가 형성된다.The inlet forming step, as shown in Figure 3e, by reducing the diameter of the upper end of the medicine tank 10, the body portion 11 is formed by drawing a predetermined portion of the inlet 12 so that the valve 20 is coupled Forming, by rotating the upper end of the body portion 11 to the inside using a processing roller (not shown), and to reach the portion corresponding to the inlet portion 12 by spinning approximately vertically to the body portion 11 Inlet 12 is formed in the center of the top of the.

도 3f는 입구형성단계 이후 반복된 스피닝으로 인해 입구부(12)의 상면이 불균일해지게 되므로, 입구부의 상면을 절삭가공하는 단계 및 입구부(12)의 중심선상으로부터 일정 거리를 두고 동심원상에 오링삽입홈(12b)을 형성하는 단계를 보인 것이다.3F shows that the upper surface of the inlet 12 becomes uneven due to repeated spinning after the inlet forming step, so that the upper surface of the inlet 12 is cut and the concentric circle is spaced a predetermined distance from the center line of the inlet 12. It shows the step of forming the O-ring insertion groove (12b).

상기 나사가공단계는, 도 3g와 같이, 축관된 입구부(12)의 내주면에 밸브(20)와의 결합을 위해 나사산(12a)을 형성하는 것으로, 입구부(12)의 두께 손실을 최소화할 수 있도록 전조가공 방식으로 나사산(12a)을 형성하는 것이 바람직하다. 즉, 나사 탭 형상을 결정하고 이를 기준으로 전조 탭의 외경에 나사 탭 형태에 준하는 임의의 등간격 곡률에 따라 가공 대상 소재(입구부)의 내경에 나사산을 형성함으로써 나사 탭의 가공성이 향상되고 수명이 연장되며 구조적으로 고품질의 나사 탭을 제조할 수 있게 된다.The screw processing step, as shown in Figure 3g, by forming a thread (12a) for coupling with the valve 20 on the inner circumferential surface of the inlet portion 12, the thickness loss of the inlet portion 12 can be minimized It is preferable to form the threaded portion 12a in a rolled manner so that the threaded portion 12a is formed. In other words, by determining the thread tap shape and forming a thread in the inner diameter of the material (inlet) to be processed according to the uniformly uniform curvature corresponding to the shape of the thread tap at the outer diameter of the rolled tap, the machinability of the thread tap is improved and the service life is increased. This extended and structurally high quality thread tap can be manufactured.

이와 같은 소화기는 소화액의 누출을 방지할 수 있으므로, 상기 소화액이 누출되면서 소화기가 설치되는 장소, 예컨대 주방에 소화기를 비치해 놓을 경우 선반이나 가스기기 등으로 소화액이 유입되어 발생하는 2차적인 부식사고 및 이로 인한 화재발생을 방지할 수 있게 된다.Since such a fire extinguisher can prevent the leakage of the extinguishing fluid, a secondary corrosion accident caused by the inflow of the extinguishing fluid into a shelf or a gas appliance when the extinguisher leaks is provided in a place where the extinguisher is installed, such as a kitchen. And it is possible to prevent the fire caused by this.

이상에서 설명한 바와 같이, 본 발명에 의하면 기존의 상하로 분할된 약제탱크를 용접 고정하는 것과는 달리, 드로잉 및 스피닝과정을 거쳐 일체로 형성함으로써 약제탱크 내부에 저장되는 소화액의 누출을 확실하게 방지할 수 있으며, 그로 인해 약제 누출에 따른 2차 부식사고 등을 미연에 예방할 수 있게 됨으로써 사용자로 하여금 제품에 대한 신뢰도를 극대화시킬 수 있게 된다.As described above, according to the present invention, unlike welding and fixing the conventional vertically divided drug tank, it is possible to reliably prevent the leakage of the extinguishing fluid stored in the drug tank by integrally formed through the drawing and spinning process. As a result, it is possible to prevent secondary corrosion accidents due to drug leakage, thereby allowing the user to maximize the reliability of the product.

Claims (6)

냉간압연강판을 적당한 길이로 절단하는 강판절단단계와, 절단된 강판을 드로잉하여 소화약제가 내장되도록 상면이 개구된 몸체부를 가공하는 몸체형성단계와, 상기 몸체부의 상단을 스피닝하여 소화약제를 분사하기 위한 분사호스가 구비된 밸브가 결합되도록 입구부를 축관 형성하는 입구형성단계와, 상기 축관된 입구부의 내주면에 밸브가 대응 결합되도록 나사산을 형성하는 나사가공단계로 이루어지는 것을 특징으로 하는 소화기용 약제탱크의 제조방법.Steel sheet cutting step of cutting the cold rolled steel sheet to an appropriate length, Body forming step of processing the body portion with the upper surface is opened so that the extinguishing agent is built by drawing the cut steel sheet, Spinning the upper end of the body portion to spray the extinguishing agent An inlet forming step of forming an inlet pipe shaft to the valve having a spray hose for coupling, and the screw processing step of forming a screw thread so that the valve is coupled to the inner circumferential surface of the inlet pipe portion of the chemical fire extinguisher tank, characterized in that Manufacturing method. 제1항에 있어서, 상기 몸체형성단계는 강판을 상측 방향으로 가압하여 드로잉하는 상방향 드로잉단계와, 상방향 드로잉단계 후에 강판을 하측 방향으로 가압하여 드로잉하는 하방향 드로잉단계와, 반복된 드로잉단계 후 여분의 강판을 제거하는 트리밍단계를 포함하는 것을 특징으로 하는 소화기용 약제탱크의 제조방법.The method of claim 1, wherein the forming of the body comprises: an upward drawing step of pressing the steel plate in an upward direction and a downward drawing step of pressing and drawing a steel plate downward in an upward direction after the upward drawing step; Method of producing a chemical tank for fire extinguisher, characterized in that it comprises a trimming step of removing the extra steel plate after. 제1항에 있어서, 상기 입구형성단계는 입구부의 중심선상으로부터 일정 거리를 두고 동심원상에 오링안착홈을 형성하는 단계를 포함하는 것을 특징으로 하는 소화기용 약제탱크의 제조방법.The method of claim 1, wherein the inlet forming step comprises the step of forming an O-ring seating groove on a concentric circle at a predetermined distance from the center line of the inlet portion. 제1항에 있어서, 상기 입구부의 내주면은 전조가공방식에 의해 나사산이 형성되는 것을 특징으로 하는 소화기용 약제탱크의 제조방법.The method of claim 1, wherein the inner circumferential surface of the inlet portion is threaded by the rolling process method of manufacturing a chemical tank for fire extinguishers. 제1항 또는 제2항의 방법으로 제조되어 소화약제가 저장되는 몸체부와 밸브가 결합되는 입구부가 일체로 형성되는 것을 특징으로 하는 소화기용 약제탱크.The pharmaceutical tank for fire extinguisher, characterized in that the inlet portion is formed integrally with the body portion is stored in the method of claim 1 or 2 and the valve is stored. 제5항에 있어서, 상기 몸체부 및 입구부는 냉간압연강판으로 이루어진 것을 특징으로 하는 소화기용 약제탱크.The chemical tank for fire extinguisher according to claim 5, wherein the body portion and the inlet portion are made of cold rolled steel sheet.
KR1020020073259A 2002-11-23 2002-11-23 Drug tank for fire extinguisher and manufacturing method thereof KR20030004198A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210066661A (en) * 2019-11-28 2021-06-07 삼우산기 주식회사 Fire extinguisher for improved body integrity, and manufacturing method thereof
CN114413531A (en) * 2022-01-11 2022-04-29 河南新科隆电器有限公司 Novel liquid storage tank for refrigerator/freezer and processing method thereof

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Publication number Priority date Publication date Assignee Title
KR900006041A (en) * 1988-10-26 1990-05-07 석윤기 Manufacturing method of metal container
JPH03226327A (en) * 1990-01-30 1991-10-07 Masanobu Nakamura Forming method for mouth part of pressure container
KR920006049A (en) * 1990-09-14 1992-04-27 곽태수 Manufacturing method of high pressure container
JPH06234029A (en) * 1993-01-20 1994-08-23 Sang-Jing Choe Method of producing weld seamless liquefied gas container and said weld seamless container
KR960000343A (en) * 1994-06-29 1996-01-25 이세로 Vacuum container manufacturing method by impact extrusion
KR20020021938A (en) * 2000-09-18 2002-03-23 정형근 A manufacturing method of duplication vessel of vacuum bottle and the vessel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900006041A (en) * 1988-10-26 1990-05-07 석윤기 Manufacturing method of metal container
JPH03226327A (en) * 1990-01-30 1991-10-07 Masanobu Nakamura Forming method for mouth part of pressure container
KR920006049A (en) * 1990-09-14 1992-04-27 곽태수 Manufacturing method of high pressure container
JPH06234029A (en) * 1993-01-20 1994-08-23 Sang-Jing Choe Method of producing weld seamless liquefied gas container and said weld seamless container
KR960000343A (en) * 1994-06-29 1996-01-25 이세로 Vacuum container manufacturing method by impact extrusion
KR20020021938A (en) * 2000-09-18 2002-03-23 정형근 A manufacturing method of duplication vessel of vacuum bottle and the vessel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210066661A (en) * 2019-11-28 2021-06-07 삼우산기 주식회사 Fire extinguisher for improved body integrity, and manufacturing method thereof
CN114413531A (en) * 2022-01-11 2022-04-29 河南新科隆电器有限公司 Novel liquid storage tank for refrigerator/freezer and processing method thereof

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