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WO1999047295A1 - Dispositif de pulverisation pour moules - Google Patents

Dispositif de pulverisation pour moules Download PDF

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Publication number
WO1999047295A1
WO1999047295A1 PCT/DE1999/000707 DE9900707W WO9947295A1 WO 1999047295 A1 WO1999047295 A1 WO 1999047295A1 DE 9900707 W DE9900707 W DE 9900707W WO 9947295 A1 WO9947295 A1 WO 9947295A1
Authority
WO
WIPO (PCT)
Prior art keywords
spray
spraying
release agent
separating
agent
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.)
Ceased
Application number
PCT/DE1999/000707
Other languages
German (de)
English (en)
Inventor
Rudolf Wollin
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.)
WOTEC Automationssysteme GmbH
Original Assignee
WOTEC Automationssysteme 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 WOTEC Automationssysteme GmbH filed Critical WOTEC Automationssysteme GmbH
Priority to AU52639/99A priority Critical patent/AU5263999A/en
Publication of WO1999047295A1 publication Critical patent/WO1999047295A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B22C23/02—Devices for coating moulds or cores

Definitions

  • the invention is based on a spraying device for separating agents on casting molds according to the preamble of the main claim and the secondary claim 8.
  • a liquid release agent is atomized by air and sprayed onto the casting mold via nozzles. Not only is the mold cleaned by blowing it out, but a separating film is applied to the contour of the mold and a lubricating film is applied to the moving parts. In addition, this also cools the mold surface, particularly by extracting heat of vaporization, in particularly hot places. As a result, the mold construction can be kept relatively simple.
  • the aim is on the one hand to obtain the most uniform possible spraying agent and on the other hand to keep the spraying process as short as possible.
  • the invention according Sprühvorri device with the characterizing features of the main claim and the dependent claims 5 and 8 has the advantage that, due to the electrostatic charge, the release agent is applied thinly and evenly with a minimum of time and air consumption and / or liquid consumption, because, due to the resulting discharge of the spray particles, a very even application is given - the still loaded spray particles are looking for places that have not yet been coated and are therefore insulated - this transport with air and / or water at low pressure and low speed can be done.
  • powder is used as the release agent.
  • the coating of objects by means of appropriate powder and the application of the powder by means of electrostatic spray processes has been known as a painting process with its advantages for more than 20 years. After spraying, the powder is liquefied by heat treatment, so that a firm coating is formed on the mold surface.
  • the release agent consumption can be reduced by up to 80% and the compressed air consumption by up to 70%. Possibly. there is no need for water in the release agent.
  • the tool life can be increased by 20 to 60% and the reject of workpiece parts can be reduced by up to 50%.
  • liquid is used as the release agent, it being possible to use the previous systems with minor additions. It is crucial here that the liquid is isolated from the charge to the spray head in order not to be neutralized prematurely.
  • the liquid release agents contain water with the known advantages of cooling given by the removal of heat of vaporization.
  • a further embodiment of the invention which is also claimed for itself, has the use of powdery release agents and liquid release agents.
  • the advantages of both release agents namely powder and liquid, complement each other in an almost ideal way, whereby this method can be used with almost all casting molds.
  • the wet process with liquid release agents achieves the cooling effect which is hardly present in the powder.
  • only water can be used as the liquid coolant, without additional separating agent, which is atomized and of course also electrostatically charged.
  • the water is only, or preferably, sprayed onto the hot areas of the mold, the water evaporating as completely as possible in order to achieve the desired, greatest cooling effect and, above all, no voids can form in the workpiece.
  • This does not preclude the use of other coolants as a supplement, such as cooled compressed air, liquid air or alcohol, although this is only of advantage in extreme or special cases.
  • the combined use of liquid and powder sprays is also for other applications interesting, such as special coating processes with strongly undercut shapes and the like.
  • the release agents are electrostatically charged as internal charging, external charging or frictional electricity.
  • the separating means are transported by conveying air, wherein liquid could also serve as the transport means, as stated at the beginning.
  • a high-voltage generator is used for electrostatic charging. While the time for charging and discharging is very short, this must be taken into account for the location of the high voltage generator.
  • the separating means are charged electrically as an external charge at the outlet of the nozzle or as an internal charge within the supply channel of the separating means to the nozzle or as a combination of the two, it also being conceivable that in the case of a spray head with several nozzles or outlets , in particular in combination with hand guns or the like. Part of the release agent is carried out by external charging and another part by internal charging. Of course, it is also conceivable that these two charging systems take place on only one line / nozzle. Last but not least, high-voltage generation can also take place in the tribology process, in which the electricity is generated by friction.
  • the parts of the release agent line inside the spray head and machine are made of plastic, except for the parts which serve for electrostatic charging or the device parts arranged between the spray head and machine are made of plastic. This primarily addresses the problem of electrical insulation, quite apart from the advantages of corrosion.
  • the separating agent is entrained and transported by the conveying air from a storage container and a suction line according to the injector principle, or else according to a swirl chamber principle.
  • Fig. 2 shows the spray device of FIG. 1 within a
  • a spraying machine 2 of a spraying device for powder as a release agent with spraying plates 3 is inserted between the two mold halves 1 of a casting mold.
  • An insulator 4 is arranged between the spray machine 2, which consists mostly of conductive metal, and the spray plates 3, which also consist of conductive metal.
  • the high voltage generated, for example, in a cascade is conducted via a control unit 5 and a high-voltage line 6 through the insulator 4 to the spray plates 3.
  • the high voltage is applied to the spray plate 3.
  • the spray plate 3 is thus completely under high voltage and thus also connected to it spray pipes 7 with spray nozzles 8, which are also made of metal.
  • High voltage is therefore available at any number of possible spray nozzles 8 for charging powder particles provided as a release agent.
  • the insulator 4 protects against undesired voltage discharges to the spraying machine 2.
  • the powder 10 provided as a release agent, which is sucked in through an injector 11 and metered into the dry air flowing in the line 12.
  • the powder stream is fed to the spray plates 3 or the spray nozzles 8 via a spray line 13.
  • the outflowing powder air flow 14 is electrically charged in the electric field between the nozzle 8 and the mold 1 (corona) and attracted by the grounded mold halves 1.
  • the dosage is carried out via a regulator 15.
  • the mold is cleaned via a high-pressure blow circuit 16.
  • the spray plates 3 are, as usual, suitable for use in the foundry, absolutely insensitive to heat (radiation hot form) and shocks.
  • the spray lines 13 are the same as for liquid release agents.
  • Any number of spray lines 13 can be easily installed and adjusted in a direction-oriented manner.
  • the entire system is extremely cost-effective, since any number of spraying points can be supplied with a supply of powder flow and high voltage that is consistently suitable for foundries.
  • the spray plates 3 somewhat reduce the field strength and thus the efficiency of the charging due to the metal surface (capacity). This is offset by the absolute suitability for foundry.
  • a variant of this embodiment would be to manufacture the spray plates 3 from a plastic suitable for casting. isolate or reduce the metal surfaces. The high voltage is then fed to the spray pipes in an insulated manner in the plastic plate.
  • the nozzle is made of metal and, thanks to its pointed shape, has an optimal charging zone (corona). At the same time, the metal nozzle is robust and insensitive. This variant is a little more effective, but significantly more expensive and not as robust.
  • the insulator itself must be kept clean from conductive parts (metal filter or water particles, moisture, etc.). When the spraying tool is started up, the isolator is therefore automatically protected (sleeve or bellows) or cleaned using a wiper.
  • the high-voltage generator line must be led from the high-voltage generator to the spray plates without any interruption in order to avoid discharges, while it would be necessary to place the high-voltage generator in front of the isolator 4 or even better to integrate it into the isolator.
  • the powder line has a permanent, very weak air flow, so that no moisture or dirt enters the nozzles and no residual powder can settle.
  • a closed ring line can be used, in which the powder is continuously circulated from the container via the spraying tool and back to the container and a partial flow is only removed during spraying.
  • the advantage is a constant, even powder flow without an initial impact, with the dosage being based on the number of spray nozzles per surface.
  • the powder container has a special fluidization for the very fine powder in order to avoid clumping and to be able to operate the container except for a small amount in the automatic mode.
  • a vortex chamber principle without an injector is particularly advantageous, in order to work as flow-free as possible and also with fine ones Dosing quantities in the physical limit range to receive stable funding.
  • a manual powder spray gun 1 can supply a manual powder spray gun 1.
  • This gun is also particularly suitable for rough foundry operation and has no built-in high-voltage generator, but is supplied with a high-voltage line 6 or powder spray line 18, if required, like the usual automatic system. It is essential here that after the handle 20 with the enabling switch and personal protection device and the insulator 21, an arc 22 with a lateral powder outlet is arranged, which corresponds better to the arrangement of the mold halves 1 and decisively simplifies the working of mold undercuts.
  • the bow tip consists of the metal nozzle described above (suitable for foundries!).
  • the curved elbow for the powder outlet can be equipped with an additional integrated high-pressure blow-out line for cleaning the mold, i.e. two functions in one gun. This simplifies handling and saves time and costs.
  • Another variant consists in conveying the powder from the powder container into an intermediate container which is located in the vicinity of the spraying tool, for example in the insulator.
  • the amount of powder in the intermediate container can 10
  • the spray nozzles are designed as injectors and can therefore be individually metered (as with wet spraying).
  • the powder spray line from the intermediate container to the spray nozzles is very short and tends to be less prone to failure.
  • This variant can further increase process reliability.
  • This variant is also particularly advantageous in the combined liquid-powder process and with an appropriate arrangement of an intermediate container for water. The amount of water to be sprayed must be kept ready on the spray tool. A standing liquid column to the rear, e.g. What hose would be unsuitable because of the risk of discharge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Dispositif de pulvérisation destiné à pulvériser des agents de démoulage sur des moules (1) à l'aide d'un appareil (3) de pulvérisation doté de buses (8) de pulvérisation et à l'aide d'air ou de liquide en tant que fluide de transport pour l'agent de démoulage. Les agents de démoulage reçoivent une charge électrostatique produite par un dispositif de production de haute tension, le moule (1) étant mis à la terre.
PCT/DE1999/000707 1998-03-13 1999-03-15 Dispositif de pulverisation pour moules Ceased WO1999047295A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU52639/99A AU5263999A (en) 1998-03-13 1999-03-15 Spraying device for casting molds

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19810957.1 1998-03-13
DE19810957 1998-03-13

Publications (1)

Publication Number Publication Date
WO1999047295A1 true WO1999047295A1 (fr) 1999-09-23

Family

ID=7860799

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/000707 Ceased WO1999047295A1 (fr) 1998-03-13 1999-03-15 Dispositif de pulverisation pour moules

Country Status (3)

Country Link
AU (1) AU5263999A (fr)
DE (1) DE19911374A1 (fr)
WO (1) WO1999047295A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022627A1 (de) * 2000-05-11 2001-11-15 Fuchs Lubritech Gmbh Gießteil-Entnahmegerät
WO2007062706A1 (fr) * 2005-12-01 2007-06-07 Laempe & Mössner GmbH Procede et dispositif de fabrication de moules ou de noyaux, en particulier pour la fonderie
DE102006062558A1 (de) 2006-12-29 2008-07-03 Bühler Druckguss AG Verfahren zum Sprühen einer Giessform
EP2087953A4 (fr) * 2007-03-28 2012-07-18 Aoki Science Inst Co Ltd Agent de demoulage a base d'huile pour la coulee, procede d'enrobage et appareil d'enrobage electrostatique
CN108817347A (zh) * 2018-07-16 2018-11-16 安徽思源三轻智能制造有限公司 一种脱模剂喷涂装置
CN111299537A (zh) * 2019-12-11 2020-06-19 王登磊 一种适用于压铸设备的专用喷涂装置
CN113927018A (zh) * 2021-10-20 2022-01-14 北京三未科技发展有限公司 一种静电喷涂的铸造成型系统及使用方法
CN114012061A (zh) * 2021-11-15 2022-02-08 东莞市潜翔通讯器材有限公司 一种手机中板的模块化压铸方法及其压铸设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004039646B4 (de) * 2004-08-14 2007-06-28 Itw Gema Ag Pulverfördervorrichtung, für Beschichtungspulver
DE102011052514B4 (de) * 2011-08-09 2018-04-19 Ks Huayu Alutech Gmbh Verfahren zur Vergütung eines durch Druckgießen hergestellten Zylinderkurbelgehäuses
CN110216262A (zh) * 2019-06-19 2019-09-10 周芮冬 一种压铸机用新型智能联动式喷雾机

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6142462A (ja) * 1984-08-07 1986-02-28 Hanano Shoji Kk ダイカスト用離型剤の静電スプレ−方法
DE3739582A1 (de) * 1986-11-27 1988-06-09 Ube Industries Verfahren und vorrichtung zum aufbringen einer russbeschichtung auf mit einer schmelze in kontakt kommende flaechen
DE3709666C1 (en) * 1987-03-24 1988-11-03 Theophil Bauer Spray head of a spray device for release agents
EP0398389A2 (fr) * 1989-05-19 1990-11-22 KLÜBER AUTOMATION GmbH & Co. KG Tête et pulvérisation d'un dispositif de pulvérisation de liquide, en particulier d'un agent de séparation
JPH0489170A (ja) * 1990-07-31 1992-03-23 Ahresty Corp 金型への粉状断熱剤の塗布装置
JPH06182519A (ja) * 1992-12-21 1994-07-05 Nichibei:Kk ダイカスト金型の離型剤塗布方法及びその塗布装置
US5385196A (en) * 1992-11-27 1995-01-31 Hanano Corporation Spray method of permanent mold casting powdery mold coating agent
JPH091282A (ja) * 1995-06-13 1997-01-07 Toyota Motor Corp 金型用粉体離型剤
DE19541056A1 (de) * 1995-11-03 1997-05-07 Wotec Automationssysteme Gmbh Sprüheinrichtung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6142462A (ja) * 1984-08-07 1986-02-28 Hanano Shoji Kk ダイカスト用離型剤の静電スプレ−方法
DE3739582A1 (de) * 1986-11-27 1988-06-09 Ube Industries Verfahren und vorrichtung zum aufbringen einer russbeschichtung auf mit einer schmelze in kontakt kommende flaechen
DE3709666C1 (en) * 1987-03-24 1988-11-03 Theophil Bauer Spray head of a spray device for release agents
EP0398389A2 (fr) * 1989-05-19 1990-11-22 KLÜBER AUTOMATION GmbH & Co. KG Tête et pulvérisation d'un dispositif de pulvérisation de liquide, en particulier d'un agent de séparation
JPH0489170A (ja) * 1990-07-31 1992-03-23 Ahresty Corp 金型への粉状断熱剤の塗布装置
US5385196A (en) * 1992-11-27 1995-01-31 Hanano Corporation Spray method of permanent mold casting powdery mold coating agent
JPH06182519A (ja) * 1992-12-21 1994-07-05 Nichibei:Kk ダイカスト金型の離型剤塗布方法及びその塗布装置
JPH091282A (ja) * 1995-06-13 1997-01-07 Toyota Motor Corp 金型用粉体離型剤
DE19541056A1 (de) * 1995-11-03 1997-05-07 Wotec Automationssysteme Gmbh Sprüheinrichtung

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 200 (M - 498) 12 July 1986 (1986-07-12) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 314 (M - 1278) 9 July 1992 (1992-07-09) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 524 (M - 1682) 4 October 1994 (1994-10-04) *
PATENT ABSTRACTS OF JAPAN vol. 097, no. 005 30 May 1997 (1997-05-30) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022627A1 (de) * 2000-05-11 2001-11-15 Fuchs Lubritech Gmbh Gießteil-Entnahmegerät
WO2007062706A1 (fr) * 2005-12-01 2007-06-07 Laempe & Mössner GmbH Procede et dispositif de fabrication de moules ou de noyaux, en particulier pour la fonderie
US7934534B2 (en) 2005-12-01 2011-05-03 Laempe & Mossner Gmbh Method and device for producing moulds or cores, in particular for foundry purposes
DE102006062558A1 (de) 2006-12-29 2008-07-03 Bühler Druckguss AG Verfahren zum Sprühen einer Giessform
EP2087953A4 (fr) * 2007-03-28 2012-07-18 Aoki Science Inst Co Ltd Agent de demoulage a base d'huile pour la coulee, procede d'enrobage et appareil d'enrobage electrostatique
US9120145B2 (en) 2007-03-28 2015-09-01 Aoki Science Institute Co., Ltd. Oil type release agent for metal casting, spray method, and electrostatic spray apparatus
CN108817347A (zh) * 2018-07-16 2018-11-16 安徽思源三轻智能制造有限公司 一种脱模剂喷涂装置
CN111299537A (zh) * 2019-12-11 2020-06-19 王登磊 一种适用于压铸设备的专用喷涂装置
CN111299537B (zh) * 2019-12-11 2021-11-16 苏州市相城区渭塘城乡发展有限公司 一种适用于压铸设备的专用喷涂装置
CN113927018A (zh) * 2021-10-20 2022-01-14 北京三未科技发展有限公司 一种静电喷涂的铸造成型系统及使用方法
CN113927018B (zh) * 2021-10-20 2023-07-21 北京三未科技发展有限公司 一种静电喷涂的铸造成型系统及使用方法
CN114012061A (zh) * 2021-11-15 2022-02-08 东莞市潜翔通讯器材有限公司 一种手机中板的模块化压铸方法及其压铸设备

Also Published As

Publication number Publication date
AU5263999A (en) 1999-10-11
DE19911374A1 (de) 1999-11-18

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