EP3887166A1 - Machine d'impression - Google Patents

Machine d'impression

Info

Publication number
EP3887166A1
EP3887166A1 EP19802072.9A EP19802072A EP3887166A1 EP 3887166 A1 EP3887166 A1 EP 3887166A1 EP 19802072 A EP19802072 A EP 19802072A EP 3887166 A1 EP3887166 A1 EP 3887166A1
Authority
EP
European Patent Office
Prior art keywords
electric motor
explosion protection
protection wall
printing machine
printing press
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19802072.9A
Other languages
German (de)
English (en)
Inventor
Johannes Schmidt
Dieter Betzmeier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bobst Bielefeld GmbH
Original Assignee
Bobst Bielefeld GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bobst Bielefeld GmbH filed Critical Bobst Bielefeld GmbH
Publication of EP3887166A1 publication Critical patent/EP3887166A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/42—Guards or covers, e.g. for preventing ingress or egress of foreign matter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0018—Protection means against injury to the operator

Definitions

  • the invention relates to a printing press with at least one electric motor.
  • Printing machines with electric motors that serve as drives are known. These printing presses usually use solvent-based ink, which means that there is a risk that the air will be enriched with solvent vapor and ignited by a spark in the electric motor.
  • the object of the invention is to provide a printing press which has inexpensive explosion protection.
  • a printing press with at least one electric motor is provided, which is arranged at a distance of less than 0.5 m from an emission source. Furthermore, the printing press has at least one explosion protection wall, which is designed in such a way that the minimum thread dimension between the emission source and the electric motor is greater than 0.5 m.
  • an emission source is understood to mean a point at which, particularly when the printing press is in operation, solvent vapor is emitted, in particular of liquid solvent-based ink which has not yet dried completely.
  • the location is in particular formed by a part of the printing press itself, operating resources such as material webs and printing ink being regarded as part of the printing press in this context.
  • the emission source can be an anilox roller, a printing cylinder, a chambered doctor bar, an ink tray or a printed material web.
  • the thread dimension is the length of a thread stretched between two points, ie the shortest free path which connects two points with one another bypassing obstacles. In contrast, intermediate obstacles are not taken into account when two points are separated.
  • the explosion protection wall extends the minimum thread dimension between the emission source and the electric motor to at least 0.5 m.
  • the minimum thread dimension is a value of over 0.5 m, which must be observed in accordance with safety regulations in order to reliably rule out an explosion hazard. Due to the explosion protection wall, the printing press can be constructed in a very compact and cost-effective manner since no complex devices for explosion protection are required.
  • the explosion protection wall is part of a labyrinth construction that ensures that the minimum thread dimension is greater than 0.5 m, even if the electric motor is located closer than 0.5 m to the emission source.
  • the explosion protection wall is part of a housing that is open on one side.
  • the thread dimension to the electric motor can be determined, which is not the case with a completely closed housing, since the thread cannot be pulled through a completely closed housing.
  • the open housing has the advantage that heat can be dissipated more easily from the electric motor, as a result of which overheating of the electric motor can be prevented with less effort.
  • the housing has an opening on one side of the electric motor which is arranged opposite to the emission source. In this way, the thread dimension is particularly greatly extended by the housing, so that the electric motor can be arranged particularly close to the emission source.
  • the printing press has a container which, in particular when the printing press is in operation, is intended to receive ink containing solvent up to a maximum level.
  • the electric motor is arranged relative to the container in such a way that the minimum thread dimension between the maximum level and the electric motor without the Explosion protection wall is less than 0.5 m.
  • the explosion protection wall is designed in such a way that the minimum thread dimension between the maximum level and the electric motor with the explosion protection wall is greater than 0.5 m.
  • the maximum level forms the emission source in particular.
  • the maximum level takes into account any machine parts, such as ink rollers, which may be immersed in the ink, so that the required protective distance of 0.5 m is ensured during operation of the printing machine.
  • the container is a paint box or a paint pan, which usually have a larger amount of liquid solvent-based paint and thus form an essential emission source during operation.
  • the electric motor itself is preferably not designed to be explosion-proof, as a result of which the printing press can be designed to be particularly cost-effective. Further advantages and features result from the following description and from the attached drawings. In these show:
  • FIG. 1 is a schematic representation of a printing machine according to the invention without explosion protection wall
  • FIG. 2 is a schematic representation of the printing machine of Figure 1 with explosion protection wall.
  • FIG. 1 shows a printing press 10 which has an ink fountain 12 and an electric motor 14.
  • the printing press 10 cannot have an ink fountain 12.
  • the printing press 10 is, for example, a flexographic printing press or a gravure printing press.
  • the ink fountain 12 is filled with liquid solvent-based paint 16 up to a maximum level 18.
  • the electric motor 14 is fastened to a carrier 20 of the printing press 10. In the present embodiment, the electric motor 14 forms an adjustment drive of the printing press 10.
  • the distance A between the ink fountain 12 and the electric motor 14 is 0.25 m.
  • the thread dimension Fi between the maximum level 18 and the electric motor 14 is 0.4 m.
  • the distance between the maximum level 18 and the electric motor 14, with a negligible wall thickness of the ink fountain 12, is 0.25 m analogous to the distance A between the ink fountain 12 and the electric motor 14.
  • an explosion protection wall 22 is provided (see FIG. 2).
  • the emission source can be formed by any location, in particular in or on the printing press 10, which, when the printing press 10 is operating, has solvent-containing ink 16, which secretes solvent vapors to its surroundings.
  • the explosion protection wall 22 is part of a housing 24 which surrounds the electric motor 14.
  • the electric motor 14 is arranged in the housing 24 and fastened together with this to the carrier 20.
  • the housing 24 is cuboid and has an opening 26 which is arranged opposite to the ink fountain 12 and thus opposite to the maximum level 18.
  • the housing 24 has the shape of an open shoe box.
  • the housing 24 is completely closed, so that no solvent or solvent-containing air can pass through the housing 24. In other words, the housing 24 is sealed.
  • the explosion protection wall 22 is collar-shaped and runs closed around the electric motor 14 in the circumferential direction. With the explosion protection wall 22, the minimum thread dimension F2 between the maximum level 18 and the electric motor 14 is 0.6 m.
  • the housing 24 and / or the explosion protection wall 22 can be of essentially any design, the geometry of the housing 24 and / or the explosion protection wall 22 ensuring that a sufficiently large thread dimension F is ensured between the emission source and the electric motor 14.
  • the explosion protection wall 22 can be part of a labyrinth construction which ensures that the thread dimension F between the emission source and the electric motor 14 is greater than 0.5 m.
  • the printing press 10 is not limited to the embodiment shown in the figures.
  • the distance A between the electric motor and the emission source can be any value between 0 and 0.5 m.
  • the minimum thread dimension F2 can be any value above 0.5 m.
  • the thread dimension Fi is extended by the explosion protection wall 22 to the thread dimension F2, which ensures that the electric motor 14 is arranged outside of a range by the operation of the
  • Printing machine can form an ignitable air mixture. An explosion of the solvent can thus be reliably ruled out.

Abstract

L'invention concerne une machine d'impression (10) comprenant au moins un moteur électrique (14) qui est disposé à une distance de moins de 0,5 m d'une source d'émission (18). Au moins une paroi de protection contre les explosions (22) est prévue, de sorte que la distance (F) entre la source d'émission (18) et le moteur électrique (14) soit supérieure à 0,5 m.
EP19802072.9A 2018-11-27 2019-11-05 Machine d'impression Pending EP3887166A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18020619 2018-11-27
PCT/EP2019/025381 WO2020108796A1 (fr) 2018-11-27 2019-11-05 Machine d'impression

Publications (1)

Publication Number Publication Date
EP3887166A1 true EP3887166A1 (fr) 2021-10-06

Family

ID=64556641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19802072.9A Pending EP3887166A1 (fr) 2018-11-27 2019-11-05 Machine d'impression

Country Status (4)

Country Link
US (1) US20220024199A1 (fr)
EP (1) EP3887166A1 (fr)
CN (1) CN113165378B (fr)
WO (1) WO2020108796A1 (fr)

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098436A (en) * 1961-08-29 1963-07-23 Armstrong Cork Co Register control for rotary printing press
GB1169566A (en) * 1966-11-24 1969-11-05 Crosfield Electronics Ltd Improvements relating to Printing Processes and Apparatus
US4557191A (en) * 1984-07-16 1985-12-10 M. E. Cunningham Company Multiple movement marking machine
DE3533115C2 (de) * 1985-09-17 1995-05-24 Bosch Gmbh Robert Spritzschutzabdeckung für den Schleifringraum eines Wechselstromgenerators
US4852486A (en) * 1988-11-25 1989-08-01 Basf Corporation Portable flexographic proofer device
US5697203A (en) * 1992-05-20 1997-12-16 Hachiku Shoji Kabushikikaisha Production unit of long-term preservable lunch and lunch box used for said lunch
DE4402158C1 (de) * 1994-01-26 1995-02-02 Heidelberger Druckmasch Ag Schutzvorrichtung an Druckmaschinen
ATE374104T1 (de) * 2002-03-20 2007-10-15 Comexi Sa Flexodrucker mit kammern mit einer regulierten temperatur und dampfabzug
GB2430406A (en) * 2005-09-21 2007-03-28 Focus Label Machinery Ltd A printer
EP1775124A1 (fr) * 2005-10-13 2007-04-18 Kba-Giori S.A. Machine d'impression avec un groupe d'impression modulaire additionnel
DE202011002408U1 (de) * 2011-02-04 2012-05-07 Ebm-Papst Mulfingen Gmbh & Co. Kg Gleichstrom-Elektromotor in explosionsgeschützter Bauart
DE102012211708B4 (de) * 2012-07-05 2015-07-09 Koenig & Bauer Aktiengesellschaft Rollenversorgungssystem einer Rollendruckmaschine, Rollendruckmaschine sowie Verfahren zur Bedienung eines Rollenversorgungssystems einer Rollendruckmaschine
CN103036345A (zh) * 2012-12-14 2013-04-10 山东省源通机械股份有限公司 防爆电机外壳
CN104121940B (zh) * 2014-07-29 2016-08-17 成都国光电子仪表有限责任公司 一种用于燃气探测仪稳定式防爆壳体
CN104122300B (zh) * 2014-07-29 2016-08-17 成都国光电子仪表有限责任公司 高密封式燃气检测仪防爆壳体
CN204669135U (zh) * 2015-06-18 2015-09-23 浙爆集团有限公司 抛光机专用粉尘防爆三相异步电动机
CN105515258B (zh) * 2015-12-03 2018-05-18 卧龙电气南阳防爆集团股份有限公司 一种带电流互感器的隔爆+增安型复合防爆电机
CN205951491U (zh) * 2016-08-19 2017-02-15 云南创新新材料股份有限公司 一种刮墨刀架自动摆动装置
CN206564087U (zh) * 2017-01-12 2017-10-17 北京电子科技职业学院 地面焊接火灾与爆炸模拟模型
CN108246160B (zh) * 2017-12-30 2020-02-07 广州泰行智能科技有限公司 一种用于手机触摸屏印刷的油墨自动注入器
CN208083051U (zh) * 2018-01-24 2018-11-13 深圳市佳宝特实业有限公司 一种实验室远程控制型智能通风柜
CN108297537A (zh) * 2018-03-30 2018-07-20 海宁酷彩数码科技有限公司 一种印花导带结构

Also Published As

Publication number Publication date
US20220024199A1 (en) 2022-01-27
CN113165378A (zh) 2021-07-23
WO2020108796A1 (fr) 2020-06-04
CN113165378B (zh) 2022-11-04

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