DE102004002533B4 - Method and apparatus for cleaning mold sprayers / mold spray bars of die spray machines for die casting machines - Google Patents

Abstract

method for cleaning mold spray tools or mold spray bar in which two separate cleaning devices (26, 30), each in Racks (27, 41) are housed and on rollers (28, 42) movable are combinable with each other by connecting them with hoses (6, 23), wherein the cleaning equipment (26, 30) used cleaning water heatable (11) is to be cleaned Sprayer (34) Cleaner and compressed air can be supplied is and can be circulated through its pipeline.

Description

The The invention is based on a method and two combinable with each other Apparatus for cleaning mold spray systems and their spray-molding tools or mold spray bar for die casting machines according to the main claim 1 and the dependent claims 3 and 4.

deposits in piping systems and related Units are more or less present in all systems and can impair the use of these facilities or even destroy them Lead plants.

Nowadays, especially in aluminum die casting machines, automatic mold sprayers are used which are equipped with special spraying devices. In known generic spray devices ( DE 3709666C2 and EP 0 398389A2 ), a liquid release agent is atomized by air and sprayed through nozzles on the mold. In addition to the tempering and cleaning (by blowing) of the form these also have the task of treating the surface of the mold wall after removal of the last manufactured molding and before re-introducing liquid metal into the mold with these lubricants and release agents. These mold wall treatment means have primarily the task of preventing welding or bonding of the introduced metal with the mold material, to ensure the demolding of the finished molded part and to lubricate the moving parts of the mold, such as ejector or slider. It is desirable, on the one hand, to obtain the most uniform possible spraying agent application and, on the other hand, to keep the spraying process as short as possible. For this purpose Formsprühsysteme be used with an automatic Formsprühanlage and an attached mold spraying tool.

in the Over time, form within the leads of Formsprühanlagen and the spraying tools, by lime in the water or mainly by the release agents used, incrustations. These incrustations But they do not only form in, but also outside of the tool. During the spraying process Spray-on release agent reaches the spray tool and dries the casting machines usually existing heat quickly. Through this both internal as well external incrustations will increase the performance of the spray system considerably reduced, as from the inside piping and z. B. the spray nozzles of the Tool clogged or obstructed.

Thereby takes the volume and pressure of the one used by the equipments and for cleaning and cooling the mold required Release agent. Clogged pipes or nozzles will not get enough release agent on or in the right places of the mold walls, thereby the metal introduced during the casting process with the mold welded or glued, or when loosening gets fine cracks and therefore is no longer useful. Also This will damage the sometimes very expensive molds.

Usually have to according to the manufacturer of many of these Formsprühanlagen, these when not in use and Idle times are flushed through normal tap water during such incrustations to prevent the operation. However, the pressure is usually not enough to clean the pipes sufficiently, or in many companies This is due to lack of knowledge of the staff or the time required not done. For example, in many businesses you can find holidays or weekends the release agents in the lines and dry.

in the Contrary to the spray system, become the spray tools used in regular time Distance removed and cleaned. This is the spray tool completely disassembled and the soiled items either with special chemical cleaners (cold cleaners) cleaned, or replaced with new parts and then reassembled.

To requires the rebuilding of the spray tool but afterwards a new program of automatic spraying and alignment the spray nozzles on the special casting mold. It goes without saying that this is a very time and cost intensive process is. In many companies, there is usually a whole department for regular maintenance the spray tools responsible.

But the cleanest spray tool can not do anything if the supply lines for the release agent in the spray system are clogged or obstructed and so not enough release agent gets to the tool with the required pressure.

It is hardly possible to free the release agent supply lines in the spray system from incrustations. Disassembly for cleaning complex spray systems is technically costly and time-consuming and uneconomical for many companies. Instead, many companies are increasing the spray times of their systems to compensate for the lower amount of release agent. The consequences are longer time intervals between the individual casting processes, increased release agent consumption and around world technical problems.

Known cleaning devices with separate cleaning and treatment assembly show WO97 / 35672A1 and the DE 19811840A1 the latter already having a heating device for the cleaning agent.

Of the The invention is based on the problem, a method and the associated device to create in the pipes and equipment parts of the mold spraying equipment existing release agent, lime and rust deposits and others Incrustations, without having to disassemble them, safely and inexpensively reduce. This task is solved with the features of the application according to claim claim 1 and the devices according to claims 3 and 4.

Advantages of invention

With the inventive method and the cleaning devices according to the invention for carrying out the Method with the features of the main claim 1 and the dependent claims 3 and 4 can be sprayed and spraying tools, Clean with a small time and cost. Depending on used detergents, can not only plants with Metal pipes free from corrosion and incrustations, it is without further also for Installations with plastic piping applicable.

By the use of hot Water and the supplied Air pressure, all can be Release encrustations on the inside of the pipes and rinse them out. Of the supplied Reinforced air pressure doing the rinse effect.

ever after application time and cleaning agent nearly 95% can be Remove the impurities.

• – Zur Reinigung der Formsprühanlagen nach dem Hauptanspruch 1 wird das Reinigungsgerät des Anspruches 3 mit einem flexiblen Schlauch, der mit einem Adapter je nach vorhandenen Zuleitungen für das Trennmittel geteilt wird an diese angeschlossen. Das Schmutzwasser welches am Ende des zu reinigenden Rohrsystems, wo normalerweise der Sprühkopf an der Sprühanlage befestigt wird, austritt, wird mittels eines montierten zweiten flexiblen Schlauches zum Reinigungsgerät zurückgeführt und somit der Wasserkreislauf geschlossen. Durch universelle Anschlussstecker lässt sich das Gerät relativ einfach an sämtliche Rohrleitungen und Spülbalkenkreise anschließen. Es sind keine größeren Montagearbeiten nötig. Die Vorrichtung wird nach Abschluss der Reinigungsarbeiten wieder von der Anlage abgebaut. Sie wird also nur zeitweilig in den entsprechenden Anlagen eingesetzt.
• – Zur Reinigung der Sprühwerkzeuge nach dem Hauptanspruch 1, werden diese in die erfindungsmäßige Reinigungsvorrichtung des Anspruchs 4 gelegt und über flexible Schläuche für den Zu- bzw. Abfluss des heißen Reinigungswassers mit dem Reinigungsgerät des Anspruchs 3 verbunden, wodurch wieder ein Wasserkreislauf gebildet wird. Durch das erfindungsgemäße Reinigungsgerät müssen die Sprühwerkzeuge nicht mehr komplett zerlegt und wieder zusammengesetzt werden. Das Werkzeug wird lediglich von der Sprühanlage abmontiert, mit dem Reinigungsgerät gereinigt und wieder an die Anlage angeschlossen. Das Werkzeug ist sofort funktionsbereit; Es muss weder neu programmiert noch eingestellt werden, da bei der Reinigung keine Düsen verstellt werden.

The method according to the invention includes two devices for carrying out the cleaning work.

• - For cleaning the mold spraying according to the main claim 1, the cleaning device of claim 3 is connected to a flexible hose which is shared with an adapter depending on the existing leads for the release agent to this. The dirty water which emerges at the end of the pipe system to be cleaned, where normally the spray head is attached to the spray unit, is returned by means of a mounted second flexible hose to the cleaning device, thus closing the water cycle. Universal plugs make it relatively easy to connect to all piping and purge circuits. There are no major installation work needed. The device is dismantled from the system after completion of the cleaning work. It is therefore only used temporarily in the corresponding systems.
• - For cleaning the spray tools according to the main claim 1, these are placed in the inventive cleaning device of claim 4 and connected via flexible hoses for the inflow and outflow of hot cleaning water with the cleaning device of claim 3, whereby again a water cycle is formed. By the cleaning device according to the invention, the spray tools no longer have to be completely disassembled and reassembled. The tool is only removed from the spray system, cleaned with the cleaning device and reconnected to the system. The tool is ready to work immediately; It does not need to be reprogrammed or set, as no nozzles are adjusted during cleaning.

ever according to degree of soiling, the offset with cleaning agents name is Water, with the help of the water pump and the supplied air pressure at both Types of cleaning, one to three hours through the resulting water cycle circulated.

The to the cleaning device recycled water flows in a special filter device and gets to thorough Filtering back into the water cycle.

This does not lead only to a lower water consumption, but also to a lower one Energy consumption, because not constantly cold water needs to be heated up.

By the filtering leaves the used water and detergent for cleaning several Use systems and tools.

ever after cleaning agent leaves the cleaning water at the end of the cleaning in the normal Release agent filtration of the respective company, according to previous Cleaning of metal and treatment agent residues by filtering, centrifuging, Weaning and the like, reuse or compliance the relevant legal Regulations easily in the public Initiate sewage network.

By cleaning the separating agent lines, the mold spraying systems and the spraying tools again receive almost the maximum performance of a comparable, as-new plant. This leads logically also to an increase in performance of the casting machines, as shortened by the smooth operation of the sprayer, the time intervals between the casting operations and the reject rate of the cast workpieces is greatly reduced. In addition, the quality of the workpieces produced increases, since the smooth operation of the spray system, the release agent is applied evenly and sufficiently on the mold walls.

drawing

One embodiment The invention is illustrated in the drawing and in the following described in more detail.

It demonstrate:

1 A functional diagram of the cleaning device according to claims 1, 2 and 3 for cleaning of mold spray systems

2 Presentation of the cleaning device according to claim 3 for cleaning of mold spray systems

3 A functional diagram of the cleaning device according to claims 1, 2 and 4 for cleaning of form spray or mold spray bar

4 Presentation of the cleaning device according to claim 4 for cleaning mold spray or mold spray bar

description of the embodiment

In 1 the functional diagram of the cleaning device according to claims 1, 2 and 3 is shown. According to this functional scheme will be from a water tank 1 via a suction line 2 and an upstream water filter 3 from a pump 4 Water attracted and via a pressure line 5 to a water hose connected at the end 6 fed, which via a valve 7 is controllable. The pump 4 is via a three-phase motor 9 powered by the control box 10 is controlled. In the water tank 1 is a heater 11 with temperature display available for heating and keeping the water constant at about 90 to 95 degrees Celsius, which also via the control box 10 is controlled. The water tank 1 also has a valve 12 to supply tap water and a valve 13 to drain the tank contents. A minimum water level in the water tank 1 is indicated by a water level indicator 8th controlled. At the manometer 14 can the pressure in the pressure line 5 read off and, if necessary, the performance of the pump 4 or the three-phase motor 9 over the control box 10 increase or throttle. Furthermore, the pressure line has 5 a check valve 15 because through the connection valve 16 Compressed air to the pressure line 5 connect. This is done via a compressor which is generally present in every modern company. The air pressure can be measured on the manometer 17 read off and on the valve 16 regulate according to use. At the end of the pressure line 5 the water enters a flexible hose 6 that easily reaches the plant to be cleaned 20 lengthen. Depending on the existing connection options and lines to be cleaned, the hose can be inserted into several narrower hoses 19 by means of an adapter 18 split (in 1 for example: division from one to four hoses) and to the system to be cleaned 20 connect. The water now through the lines of the system to be cleaned 20 flows through the hoses mounted on the outlet pipes (where the spray head is normally the one that was previously removed) 21 and a second adapter 22 again in a hose 23 merged and over a valve 24 returned to the cleaning device. Here the polluted water flows into the filter device 25 , This filter device 25 has a prefilter fabric and a non-return valve serving as a backflow preventer. The purified water flows into the water tank 1 back, closing the water cycle.

This in 2 illustrated cleaning device 26 of claim 3 is housed in a stainless steel housing with flaps (for example, to clean the filters) and is on a frame with handle 27 and roles 28 attached, resulting in a compact design and good mobility. For easier transport of the required hoses, there is a reel on the device for winding the hoses (not shown).

In 3 the functional diagram of the cleaning device for the spray tools according to claims 1 or 2 and the independent claim 4 is shown. The cleaning device 26 of claim 3 is by means of a flexible hose 6 via a valve 29 to the cleaning device for the spray tools 30 of claim 4 connected. Behind the valve 29 and inside the device is an adapter 31 attached to the depending on the pitch circle of the spray tool to be cleaned 1 to 6 hoses 32 inside the unit. In general, most spraying tools possess 4 Connections. Depending on the connections used, these can be achieved via valves 33 regulate. The spray tool 34 , is in the cleaning device on the grid 35 laid and with the hoses 32 connected. The water that is now during the cleaning process by the spray tool 34 flows and on the spray nozzles 36 exits, flows through the grate 35 in the water collection basin 37 , in the middle of which an intake manifold 38 sits with filter element, thus making a swamp 39 for the dirt particles can form. That is in the pelvis 37 Collecting water flows over the intake manifold 38 and a valve 40 by means of a flexible hose 23 back to the cleaner 26 back, closing the water cycle.

In 4 the cleaning device of claim 4 is shown. The cleaning device is on a rack 41 with roles 42 appropriate to ensure good mobility. The structure consists of Plexiglas 43 to stop the spraying water and to allow a good view of the cleaning process and the spray tool. In the front area, the device has two large Plexiglas doors 44 to be able to insert larger spray tools without disassembly in the device.

Claims (4)

Method of cleaning mold sprayers or mold spray bars using two separate cleaning devices ( 26 . 30 ), each in racks ( 27 . 41 ) and on castors ( 28 . 42 ) are combinable with each other by connecting them with hoses ( 6 . 23 ), whereby that of the cleaning devices ( 26 . 30 ) used cleaning water heatable ( 11 ), the spray device to be cleaned ( 34 ) Detergent and compressed air can be supplied and can be circulated through the pipeline. A method according to claim 1, characterized in that the water used, which as dirty water to the cleaning device ( 26 ), a filter device ( 25 ) with a filter fabric and a check valve ( 15 ) and after thorough filtering back to the cleaning device ( 30 ) is supplied for reuse. Cleaning device ( 26 ) for carrying out the method according to claim 1 or 2 for the purification of mold spray systems consisting of: - a water tank ( 1 ) and a mounted in this adjustable and the temperature constant holding heater ( 11 ), a water level gauge ( 8th ), as well as a water supply ( 12 ) and a water drain valve ( 13 ), - one of the water from this tank ( 1 ) and an upstream filter ( 3 ) and into a pressure line ( 5 ) pump ( 4 ) by a motor ( 9 ), - a controllable connection ( 7 ) at the end of the pressure line ( 5 ) to the cleaning device ( 26 ) to the plant to be cleaned ( 30 . 34 ) with a hose ( 6 ) or another connection, - one with roles ( 28 ) provided frame ( 28 ) to ensure mobility, - with an adjustable connection ( 16 ) for a compressor or compressed air at the pressure line ( 5 ), - with a control box ( 10 ) via which the performance of the pump motor ( 9 ), - with a check valve ( 15 ) in the pressure line ( 5 ), - a monometer for the air ( 17 ) and water pressure ( 14 ) in the pressure line ( 5 ), - with a filter device ( 25 ) to the cleaning device ( 26 ) recirculated dirty water before it enters the water tank ( 1 ) flows back. Cleaning device ( 30 ) for carrying out the method according to claim 1 or 2 for the cleaning of mold spraying tools and mold spray bars consisting of: - a cleaning box ( 43 ) with two doors ( 44 ) sitting on a tub ( 37 ), - a shelf between tub ( 37 ) and cleaning box ( 43 ) to which the spray tool to be cleaned ( 34 ) - a frame ( 41 ) with rollers ( 42 ) on which the cleaning device ( 30 ) is mounted to ensure mobility, - with a connection ( 29 ) around the cleaning device ( 26 ) via a hose ( 6 ) or another means of connection, with an adapter ( 31 ), depending on the existing connection options or hole circles of the spray tool hoses ( 32 ) to be connected inside the device and via valves ( 33 ), whereby the hoses are attached to the supply lines of the spraying tool, - with a grate serving as a shelf ( 35 ) by that from the spray nozzles ( 36 ) of the spraying tool ( 34 ) leaking water into the underlying tub ( 37 ) flows, - with an intake manifold with filter insert ( 38 ) in the middle of the tub, whereby a swamp ( 39 ) for the dirt particles, - with a hose ( 23 ) or another connection possibility, which is attached to the intake and whereby the effluent water back to the cleaning device ( 26 ), closing the water cycle.