KR950008106A - Waste removal equipment used for punching machines for carton manufacturing - Google Patents

Waste removal equipment used for punching machines for carton manufacturing Download PDF

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Publication number
KR950008106A
KR950008106A KR1019940022169A KR19940022169A KR950008106A KR 950008106 A KR950008106 A KR 950008106A KR 1019940022169 A KR1019940022169 A KR 1019940022169A KR 19940022169 A KR19940022169 A KR 19940022169A KR 950008106 A KR950008106 A KR 950008106A
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KR
South Korea
Prior art keywords
waste
punching
punching member
area
grooves
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Application number
KR1019940022169A
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Korean (ko)
Inventor
다까유끼 다께우찌
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다까유끼 다께우찌
닛뽕 다이 스틸 가부시기가이샤
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Application filed by 다까유끼 다께우찌, 닛뽕 다이 스틸 가부시기가이샤 filed Critical 다까유끼 다께우찌
Publication of KR950008106A publication Critical patent/KR950008106A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out

Abstract

위 및 기타 목적을 성취하기 위해, 카톤(용기)를 제조하기 위해 펀칭기계로 이용되어 컷아웃부와 이 컷아웃부에 형성된 나머지부분을 포함하는 펀칭라인을 지닌 시트의 폐물영역과 시트의 제조부분 서로를 분리하며 이들 시트가 서로 접근하는 상부다이와 하부단에 끼워져 상기 다이중 하나로부터 아래로 돌출한 펀칭부재에 의해 폐물영역을 누루고 나머지 부분을 찢으므로서 시트에서 폐물영역을 제거하는 폐물제거장치에 있어서, 다수의 홈이 펀칭부재의 면에 형성되어 폐물영역의 면과 접촉하므로서 홈 사이에 규칙적인 간격으로 압착부를 형성되며 펀칭부재의 상부 및 하부단이 개방되어 있다. 다수의 홈이 펀칭부재의 면에 형성되어 폐물영역의 면과 접촉하여 규칙적인 간격으로 홈 사이에 압축부를 형성한다.In order to achieve the above and other purposes, the waste area of the sheet and the manufacturing portion of the sheet having a punching line which is used as a punching machine to manufacture a carton (container) and includes a cutout portion and the remainder formed on the cutout portion. In the waste removal apparatus which separates each other and removes the waste region from the sheet while pressing the waste region by the punching member protruding downwardly from one of the dies and inserting the sheet into the upper die and the lower end approaching each other. In this case, a plurality of grooves are formed on the surface of the punching member to be in contact with the surface of the waste region to form a crimp at regular intervals between the grooves, and the upper and lower ends of the punching member are open. A plurality of grooves are formed in the face of the punching member to contact the face of the waste area to form compression sections between the grooves at regular intervals.

Description

카톤 제조용 펀칭기기에 이용되는 폐물제거장치Waste removal equipment used for punching machines for carton manufacturing

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 3도는 본 발명의 제1실시예의 주요부분을 도시한 단면도.3 is a cross-sectional view showing the main parts of the first embodiment of the present invention.

Claims (23)

위 및 기타 목적을 성취하기 위해, 카톤(용기)를 제조하기 위해 펀칭기계로 이용되어 컷아웃부와 이 컷아웃부에 형성된 나머지부분을 포함하는 V펀칭라인을 지닌 퍼칭라인을 지닌 시트의 폐물영역과 시트의 제조부분 서로를 분리하며 이들 시트가 서로 접근하는 상부다이와 하부단에 끼워져 상기 다이중 하나로부터 아래로 돌출한 펀칭부재에 의해 폐물영역을 누루고 나머지 부분을 찢으므로서 시트에서 폐물영역을 제거하는 폐물제거장치에 있어서, 다수의 홈이 펀칭부재 면에 형성되어 폐물영역의 면과 접촉하므로서 홈 사이에 규칙적인 간격으로 압착부를 형성하는 것을 특징으로 하는 폐물처리장치.To achieve the above and other purposes, the waste area of a sheet with a punching line with a V punching line, which is used as a punching machine to produce a carton (container), including a cutout portion and the remainder formed on the cutout portion. And the fabrication parts of the sheet are separated from each other and the sheets are inserted into the upper die and the lower end approaching each other, and the waste region is removed from the sheet by pressing the waste region by the punching member protruding downward from one of the dies and tearing the remaining portions. A waste removing apparatus according to claim 1, wherein a plurality of grooves are formed on the surface of the punching member so as to be in contact with the surface of the waste region to form the pressing portions at regular intervals between the grooves. 제1항에 있어서, 펀칭부재의 홈은 단면이 V자 모양이고, 연속적으로 형성되어 있고, V자 모양의 압착부가 홈사이에 형성된 것을 특징으로 하는 폐물제거장치.The waste removal apparatus according to claim 1, wherein the groove of the punching member has a V-shaped cross section and is continuously formed, and a V-shaped crimping portion is formed between the grooves. 제1항에 있어서, 펀칭부재의 홈은 단면이 U자 모양이고, 모서리가 홈 사이에 형성된 각각의 압착부에 형성된 것을 특징으로 하는 폐물제거장치.The waste removing apparatus according to claim 1, wherein the groove of the punching member has a U-shaped cross section and is formed at each crimping portion formed between the grooves. 제1항, 제2항 또는 제3항중 한항에 있어서, 펀칭라인에 인접한 압착부는 다른 돌출부보다 약간 긴 것을 특징으로 하는 폐물제거장치.4. The apparatus of claim 1, 2 or 3, wherein the crimping portion adjacent to the punching line is slightly longer than the other protrusions. 제1항,제2항 제3항중 한항에 있어서, 펀칭부재는 수직부와 이 수직부의 일단에 연속인 수평부를 포함하며, 수직부의 나머지단은 다이중 하나의 기관에 포함된 고정부로 형성되어 있고, 수직부는 기관에 고정된 고정부와 폐물영역에 배치되어 있으며,수평부의 외부면은 폐물영역과 접촉하는 것을 특징으로 하는 폐물제거장치.The punching member according to claim 1, wherein the punching member comprises a vertical portion and a horizontal portion continuous to one end of the vertical portion, and the remaining end of the vertical portion is formed by a fixed portion included in an engine of one of the dies. And a vertical portion is disposed in the fixed portion and the waste region fixed to the engine, and an outer surface of the horizontal portion is in contact with the waste region. 제5항에 있어서, 펀칭부재는 단면이 L자 모양이고,수직부는 펀칭라인을 따라 배치되어 있고, 수평부는 폐물영역의 외부단 쪽으로 수직부의 일단으로 부터 형성된 것을 특징으로 하는 폐물제거장치.The waste removing apparatus according to claim 5, wherein the punching member is L-shaped in cross section, the vertical portion is disposed along the punching line, and the horizontal portion is formed from one end of the vertical portion toward the outer end of the waste region. 제6항에 있어서, 펀칭라인 쪽으로 돌출한 계단식 부분은 수평부로 부터 소정의 간격으로 공간을 둔 위치에서 펀칭라인과 마주하는 수직부의 측에 형성되어 계단식부분의 단부가 펀칭라인의 컷아웃부와 접촉하여 압착부에 의해 수평이 되는 것을 특징으로 하는 폐물제거장치.The method of claim 6, wherein the stepped portion projecting toward the punching line is formed on the side of the vertical portion facing the punching line at a spaced interval from the horizontal portion so that the end of the stepped portion is in contact with the cutout portion of the punching line. Waste removal apparatus characterized in that the horizontal by the pressing portion. 제7항에 있어서, V자 모양의 돌출부가 계단식 부분의 단부에 형성되어 V자 모양의 돌출부가 컷아웃부와 접촉하는 것을 특징으로 하는 폐물제거장치.8. The waste removal apparatus according to claim 7, wherein the V-shaped protrusion is formed at the end of the stepped portion such that the V-shaped protrusion is in contact with the cutout portion. 제5항에 있어서, 펀칭부재의 두개의 수직부의 하단은 수평부에 의해 서로 접촉되고, 홈과 압착부가 수평부에 형성된 것을 특징으로 하는 폐물제거장치.The waste removing apparatus according to claim 5, wherein the lower ends of the two vertical portions of the punching member are in contact with each other by the horizontal portion, and the groove and the pressing portion are formed in the horizontal portion. 제1항, 제2항, 제3항 또는 제4항중 한항에 있어서, 펀칭부재의 2개의 수직부의 하단이 수평부에 의해 서로 연결되어 있으며 홈과 압착부가 수평부에 형성된 것을 특징으로 하는 폐물제거장치.The waste removing apparatus according to claim 1, 2, 3, or 4, wherein the lower ends of the two vertical portions of the punching member are connected to each other by a horizontal portion, and the groove and the pressing portion are formed in the horizontal portion. Device. 제1항에 있어서, 펀칭부재가 고정되지 않은 또 다른 다이의 기관영역은 펀칭라인으로 포위된 영역의 부분보다 약간 작고, 기관은 기관의 주변면의 부분으로부터 돌출한 지지플레임을 경유해 다이에 고정되어 있고; 두 개의 L자 모양이 펀칭부재가 반대방향으로 돌출한 펀칭부재의 수평부의 양측에 제공된 틈에 배열되어 있고; 고정부가 수직부의 단을 연결하는 연결부로 부터 돌출해 있고; 틈이 지지플레임에 반대로 위치하므로서 폐물영역을 분리하여 이 폐물영역을 지지플레임의 양측에 누르는 것을 방지 하는 폐물제거장치.The engine area of another die in which the punching member is not fixed is slightly smaller than the portion of the area surrounded by the punching line, and the engine is fixed to the die via a support frame protruding from a portion of the peripheral surface of the engine. It is done; Two L-shapes are arranged in gaps provided on both sides of the horizontal portion of the punching member from which the punching members protrude in opposite directions; The fixing portion protrudes from the connecting portion connecting the ends of the vertical portions; A waste removal device that separates a waste area and prevents pressing the waste area on both sides of the support frame because the gap is located opposite to the support frame. 제1항에 있어서, 펀칭부재가 고정되지 않은 또 다른 다이의 기관의 영역은 펀칭라인으로 둘러싸인 영역의 부분보다 약간 작고, 기관이 기관의 주변면의 부분으로부터 돌출한 지지플레임을 경유해 다이에 고정되고; 두 개의 U자 모양의 펀칭부재가 이들 사이에 제공된 틈에 배열되어 있고, 틈의 양측에 배치된 수직부의 단이 서로 연결되어 있고, 고정부가 수직부의 단을 연결하는 연결부로부터 돌출하였으며; 틈이 지지플레임에 반대로 위치하여 폐물영역을 분리하여 이 폐물영역을 지지플레임의 양측에 누르는 것을 특징으로 하는 폐물제거장치.2. The engine area of another die in which the punching member is not fixed is slightly smaller than the part of the area enclosed by the punching line, and the engine is fixed to the die via a support flame protruding from a part of the peripheral surface of the engine. Become; Two U-shaped punching members are arranged in the gap provided between them, the ends of the vertical portions disposed on both sides of the gap are connected to each other, and the fixing portion protrudes from the connecting portion connecting the ends of the vertical portions; A waste removal apparatus, characterized in that the gap is located opposite to the support frame to separate the waste area and press the waste area on both sides of the support frame. 제1항에 있어서, 펀칭부재는 원통형 또는 직사각형 기둥이고, 홈이 펀칭부재의 면에 형성되어 폐물영역의 면과 접촉하므로서 홈 사이에 압착부를 형성하고, 모서리가 각각의 압착부에 형성된 것을 특징으로 하는 폐물제거장치.The method of claim 1, wherein the punching member is a cylindrical or rectangular pillar, characterized in that the groove is formed on the surface of the punching member to contact the surface of the waste area to form a crimp between the groove, the corner is formed in each crimping portion Waste removal device. 제13항에 있어서, 홈은 U자 모양인 것을 특징으로 하는 폐물제거장치.The waste removal apparatus according to claim 13, wherein the groove is U-shaped. 제1항에 있어서, 펀칭부재는 중공원통형이고, 이의 양단은 개방되어 있으며, 홈이 규칙적인 간격으로 펀칭부재의 주변면에 형성되어 폐물영역의 면과 접촉하므로서 홈 사이에 규칙적인 간격으로 압착부를 형성하는 것을 특징으로 하는 폐물제거장치.The method of claim 1, wherein the punching member is a hollow hollow cylinder, both ends of the punching member is open, the grooves are formed in the peripheral surface of the punching member at regular intervals and in contact with the surface of the waste area, the pressing portion at regular intervals between the grooves Waste removal apparatus characterized in that it is formed. 제15항에 있어서, 홈은 U자 모양 또는 V자 모양인 것을 특징으로 하는 폐물제거장치.The waste removal apparatus according to claim 15, wherein the groove is U-shaped or V-shaped. 제15항에 있어서, 펀칭부재는 중공원통형, 중공반원통형 또는 중공정사각형 기둥이고 양단은 개방된 것을 특징으로 하는 폐물제거장치.16. The waste removal apparatus according to claim 15, wherein the punching member is a hollow cylinder cylinder, hollow semi-cylindrical cylinder, or a hollow hollow square pillar, and both ends are open. 제15항에 있어서, 펀칭부재의 접촉면의 영역은 중공영역으로 형성될 폐물영역보다 약간 작은 것을 특징으로 하는 폐물제거장치.16. A waste removal apparatus according to claim 15, wherein the area of the contact surface of the punching member is slightly smaller than the waste area to be formed into the hollow area. 제1항에 있어서, 펀칭부재의 수직측면으로부터 반대방향으로 바깥쪽으로 돌출한 다수개의 두꺼운 부분과 다수의 얇은 부분이 펀칭부재에서 서로 교대로 형성되어 있고, 홈이 펀칭부재의 면에 형성되어 폐물영역의 면과 접촉하여 홈 사이에 압착부분을 형성하는 것을 특징으로 하는 폐물제거장치.The punching member according to claim 1, wherein a plurality of thick portions and a plurality of thin portions protruding outwardly from the vertical side of the punching member are alternately formed in the punching member, and grooves are formed in the face of the punching member to form a waste region. Waste removal device, characterized in that to form a crimping portion between the grooves in contact with the surface. 제19항에 있어서, 각각의 두꺼운 부분은 반대방향으로 U자 모양 구성으로 돌출한 것을 특징으로 하는 폐물제거장치.20. The apparatus of claim 19, wherein each thick portion protrudes in a U-shaped configuration in the opposite direction. 제19항에 있어서, 펀칭부재는 얇은 부분을 전혀 만곡되는 것을 특징으로 하는 폐물제거장치.20. The apparatus of claim 19, wherein the punching member is completely curved in the thin portion. 제1항에 있어서, 펀칭부재는 금속으로, 기관은 나무로 만들어진 것을 특징으로 하는 폐물제거장치.The waste removing apparatus according to claim 1, wherein the punching member is made of metal and the engine is made of wood. 제22항에 있어서, 펀칭부재의 고정부는 기관에 형성된 구멍으로 눌러지는 것을 특징으로 하는 폐물제거장치.23. The apparatus of claim 22, wherein the fixing portion of the punching member is pressed into a hole formed in the engine. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940022169A 1993-09-03 1994-09-03 Waste removal equipment used for punching machines for carton manufacturing KR950008106A (en)

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JP21977893 1993-09-03
JP93-219778 1993-09-03

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EP (1) EP0641632A3 (en)
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CN (1) CN1104602A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100373833B1 (en) * 1995-07-28 2003-08-21 삼성에스디아이 주식회사 Low reflective coating solution and preparation thereof
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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19648952C1 (en) * 1996-11-26 1998-04-30 Rowapack Gmbh Device for breaking out and removing waste stampings from sheets or material sheets, in particular for flat-bed stamping and / or embossing machines
FR2765135B1 (en) * 1997-06-25 1999-07-30 Yvon Raveleau PUNCHING SEPARATION BODY
DE29825182U1 (en) 1998-04-02 2005-12-22 Vossen, Franz Device for removing broken parts from material sheets
DE19837316A1 (en) * 1998-04-02 1999-10-07 Franz Vossen Device for removing broken parts from material sheets
FR2787053B1 (en) * 1998-12-15 2001-03-30 Smurfit Socar Sa PROCESS AND DEVICE FOR THE ELIMINATION OF FALLS FROM PRACTICAL CUT IN A BLANK IN A SEMI-RIGID MATERIAL
FR2827804B1 (en) * 2001-07-24 2003-10-24 Smurfit Martin Guillemin PROCESS AND EQUIPMENT FOR EJECTING PRE-CUT WASTE ON A CORRUGATED SHEET
DE10230365B8 (en) * 2002-07-05 2008-09-25 Mühlbauer Ag Device and method for separating plastic cards
FR2880576B1 (en) * 2005-01-07 2007-02-23 Raveleau Yvon DEVICE FOR REMOVING PREDECUTED PIECES FROM A SHEET OF MATERIAL
FR2890324B1 (en) * 2005-09-05 2007-11-30 Smurfit Socar Packaging Soc Pa DEVICE AND ELEMENT FOR EJECTING A PRE-CUTTED PART IN A PLATE OF A SEMI-RIGID MATERIAL AND USE THEREOF
CN102699955A (en) * 2012-06-05 2012-10-03 杭州激光刀模有限公司 Waste slice removing mould
CN104924352B (en) * 2015-07-03 2016-08-31 汕头东风印刷股份有限公司 One tears box device automatically
DE102017105508A1 (en) * 2016-12-19 2018-06-21 Boxplan Gmbh & Co. Kg Method and device for breaking out a flat workpiece from a sheet of material
CN106695983A (en) * 2016-12-30 2017-05-24 重庆皖渝纸制品有限公司 Cardboard residue separation device

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE308632C (en) *
DE636114C (en) * 1936-10-02 Laube Kurt Maschf Device for manufacturing box parts
FR1182588A (en) * 1956-09-11 1959-06-26 Thimonnier & Cie Knife device
DE1085759B (en) * 1957-05-16 1960-07-21 Rotopack G M B H Device for breaking out parts punched out on an automatic punching machine
US3285715A (en) * 1963-06-11 1966-11-15 Jr William H Burkhart Strip of flexible material having a plurality of separate metal elements mounted thereon in adjacent parallel relationship
GB1302527A (en) * 1969-03-26 1973-01-10
JPS6023960B2 (en) * 1982-06-01 1985-06-10 凸版印刷株式会社 How to punch out the window
DE3476350D1 (en) * 1983-11-17 1989-03-02 Sugano Mfg Co Separating device in an automatic stamping machine
DE8900939U1 (en) * 1988-08-01 1989-04-20 Ets Elektro-Thermische Schneidwerkzeug Gmbh, 8050 Freising, De
CH682651A5 (en) * 1990-04-12 1993-10-29 Bobst Sa movable upper tool blanking in a machine for producing packaging.
WO1991017871A1 (en) * 1990-05-17 1991-11-28 Rota Die Pty. Ltd. Improved cutting die
JPH0722913B2 (en) * 1990-08-30 1995-03-15 日本ダイスチール株式会社 Device for removing punching scraps in a paper machine punching device
US5240755A (en) * 1991-04-23 1993-08-31 Zimmer Industries, Inc. Perforated label web and method of producing such web
DE9204109U1 (en) * 1992-03-27 1992-06-25 Naumann Spezialwerkzeugfabrik Gmbh, 5090 Leverkusen, De
DE9214557U1 (en) * 1992-10-27 1992-12-17 Karl Marbach Gmbh & Co, 7100 Heilbronn, De
DE9214559U1 (en) * 1992-10-27 1992-12-17 Karl Marbach Gmbh & Co, 7100 Heilbronn, De
DE9303787U1 (en) * 1993-03-15 1993-07-01 Meurer Nonfood Product Gmbh, 7760 Radolfzell, De
DE9308115U1 (en) * 1993-05-29 1993-08-05 Naumann Spezialwerkzeugfabrik Gmbh, 51381 Leverkusen, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100373833B1 (en) * 1995-07-28 2003-08-21 삼성에스디아이 주식회사 Low reflective coating solution and preparation thereof
CN110883862A (en) * 2019-12-20 2020-03-17 无锡积捷光电材料有限公司 Insulating material punch forming die and punch processing method

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CN1104602A (en) 1995-07-05
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