DE2549059C2 - Spray device for die casting molds - Google Patents

Description

35

The invention relates to a spray device for die casting molds, in particular for aluminum die casting, a pump, a mixing head for an air-water or air-oil mixture and pipelines with spray nozzles for spraying the die-casting mold with air-water or air-oil mixtures.

Such spray devices have been known for a long time and are used on die casting machines attached because it is necessary to clean the die casting mold after each operation or to use a release agent spray. The spray nozzles are adjustable on the spray device so that all parts or Areas of the changing die casting molds can be achieved evenly. Still, it has always been shown that the supply of release agents to many, especially with more complicated die casting molds Make is inadequate.

Furthermore, for example, from DT-OS 21 39 635 a device for spraying on mold coating Known in long molds with a round inner cross-section, one in the longitudinal direction of the mold movable guide carriage supported against the mold wall with a through the support centrally guided to the mold axis spray head and includes a lifting device. The spray head of this The device is arranged in a rotating manner at the lower end of the guide carriage and has spray nozzles provided, the exit direction of the center of rotation of the spray head by a distance, so that the Recoil of the sprayed agent also serves as a rotary drive for the spray head.

It is similar in principle and can also be immersed in a long mold with a round internal cross-section Spray device with a rotating spray disc is known from US-PS 2J 87 Jb2. Here is the Spray disc with the help of a pneumatic actuator in Due to the centrifugal force, the centrifugal atiftreffeiide on the spray disc is displaced and thrown Spray away from the outside.

In the two cases described last, it is distributed the Sprühiiiittel essentially only at right angles to Axis of rotation of the spray head or the spray disc. This is sufficient for spray equipment that is included in Long, vertical molds with round internal cross-sections are lowered and then lifted out again will. However, such a spray pattern is not sufficient when spraying the work surfaces of Die-casting machine !!, since the die-casting molds have very diverse and constantly changing surfaces exhibit.

The invention is therefore based on the object of providing a spray device of the type mentioned for die casting machines to create a perfect and even distribution of the release agent (s) over ensures the entire surface of the die casting molds.

To solve this problem, the invention provides the additional arrangement of a rotating spray disc before, the spray openings in raw pieces extending radially outward from the hub. With the additionally provided, rotating spray disc is an excellent way a uniform Distribution of the release agent over the entire surface of the die casting mold without manual intervention achieved and overall a release agent coating achieved that with the conventional, by hand adjustable spray nozzles could not be obtained. This is especially true when in a further development of the invention the pipe sections are rotatable and adjustable about their longitudinal axis on the spray disc.

Another advantage is obtained by the additional arrangement of the rotating spray disc, if, in a further development of the invention, the spray disc with its spray openings and the other, conventional ones Spray nozzles each have a separate pump for water or oil and a special mixing head for Admixing of air are assigned. Then namely through the rotating spray disc and the other spray nozzles each spray release agents of different composition as it depends of the respective die-cast product is most appropriate.

Further features of the invention emerge from the description and the claims in connection with the drawing.

The invention is illustrated below using an exemplary embodiment that is shown in the drawing is described in more detail. It shows

Fig. I a flow diagram with the most important components the spray device according to the invention;

F i g. 2 shows a side view of a spray head with a spray disk;

F i g. 3 shows a plan view of the spray head according to FIG. 2;

4 shows an end view of the spray head (in FIG from right) and

5 shows a view of the spray head from below in Fig. 2.

The spray device 1 according to the invention for aluminum die casting molds comprises according to Fig. 1 in a conventional manner at the ends of pipelines

> the pipeline sump adjustable iitijj.c (w. 1ιΐι_ · ι. · Sphere nozzles 2 and 3, through the cm Wasseilull or (Air mixture is injected into the Druekgiililonii. Here / u cmc pump 4 sucks water; ms a container 5 b / vv. oil from a container 6 and prints this in a Mixing head 7, in which l'reßlutl from a compressed air storage container or a compressor 8 is added. From your mixing head 7 comes the first air water b / w. I. air oil mixture via eii: o line 4 and a Cone valve 10 to the spray nozzles 2 and 3.

The spray device I according to the invention additionally has a further pump 11 with a mixing head 12, Pießluflvoi.sorgeteil 1.3 and containers 14 and Ii for Water and oil on. These files are used for restoration a spray nozzle Ib and a rotatably mounted .Sprühscheibe 17, which via lines 18 and 19 below Interposition of cone valves 20 and 21 with the mixing head 12 in connection / to drive the rotatably mounted spray disc 17 is compressed air provided, tlie from a l'reßluitversorgcteil 22 over a line 2.3 with a control valve 24 tier spray disk 17 is fed.

For the compressed air drive, the .Sprühscheibe 17 has several ropes star-shaped from its Hub 25 outbound flights! 26, 27, 28 and 24 according to i F "i g. J on. Coming from the exhaust air supply part 22 Compressed air strikes tlie blades 26 to 29 approximately tangentially on the circumference of the spray disk 17 and rotates thereby the spray disc 17. The linden tree 30 of the line 31 carrying the compressed air for the drive is in this case, as can be seen above all from FIGS. 2 and 4, arranged in such a way that an optimum degree of efficiency is achieved will.

On the wings 26 to 29 used for propulsion opposite side, the spray washer 17 carries several radially outwardly extending from the hub 25 Gap in the pipe 32, 33 and 34 with spray openings 35.

The spray openings 35 are suitably not in a line in order to be able to optimally spray a circular area during a rotary movement. They can also be adjusted in direction to cover a larger or smaller circle. For this purpose, the pipe sections 32 to 34 are on the Spi ι about their longitudinal axis
net.

nice 17 ν er

bar or vers | elli> ar angcor

The supply of Sprühöl'liiuiigeii 35 eilolgl through the inside of the hub 25 de / Spriihseheibe, in the mille ■■ see also a spray opening 35 is located, as well through inside the (! ehäuses 36 des Spn'ihkoples! 7 arranged holes, tlie / u dem minieren Au s.jhlul.lslulzen 38 in Fig. .? to lead.

The left connection port 39 stands for mil tier

i'i drive serving Druekluftleilmig 31 in connection. The associated cone valve 24 or its secondary valve 40, which is used for communication, is shown in FIG. '> recognizable.

The two in I i g. 2 shown Kändel- b / vv.

is position screw 41 and 42 belong to both of them Conical valves 20 and 21 according to I · 'i g. I. With the help of animal Finslell screw 41 is the inflow ties from the connection piece 38 coming medium to ilen located on the .Sprühscheibe 17 spray openings 35 more 'Tier less open, while tlie F'.insiellsehraube 42 or the control valve 21 belonging to it, the flow to the spray nozzle 16 in FIG. 1 or I · 'i g. 4th regulates.

The third connection piece 43 is inside the

2.S housing 36 with a control valve 10 according to FIG. 1 in Connection, via its knurled or adjusting disk 45, the supply to the two spray nozzles 2 and 3 is controlled. In Fig. 2, only one flange 46 is for the spray nozzle 2 can be seen, but the position of the gehl

.ίο both spray nozzles 2 and 3 clearly from the F i g. 4 and 5 emerged.

As for the spray nozzles 2 and 3 on the one hand and for the spray nozzle 16 and the spray openings 35 of the spray disc 17 on the other hand, separate connection stub / .en 38 and 43 and also a special release agent supply are provided in each case, is with the invention according to the invention Spray head 37 a multiple variable operation possible. The location and arrangement of the ball valves and the associated lines inside the housing 36 of the spray head 37 is not apparent from the figures in detail, but this is also for understanding not necessary and their representation would impair the clarity of the figures.

In addition 5 sheets of drawings

Claims (4)

Patent claims: 1. Spray device for die casting molds, in particular for die-cast aluminum, the (.-ine pump, a mixing head for a mixture of air or oil and pipelines with spray nozzles for spraying the die casting mold with air or water Air oil mixtures includes, characterized by the additional arrangement of a rotating spray disc (17), the spray openings (35) in has pipe sections (.32,33,34) extending radially outward from the hub (25). 2. Spray device according to claim 1, characterized in that the spray disc (17) with their Spray openings (35) and preferably a spray nozzle (16) on the one hand and the other spray nozzles (2,3) on the other hand, each has a separate pump (4, U) for water or oil and a special one Mixing head (7, 12) for adding! .Lift assigned. 3. Spray device according to claim 1, characterized in that the spray disc (17) on its on one side several blades (26 to 29) extending in a star shape from their hub (25) for a compressed air drive and has spray openings (35) on its other side. 4. Spray device according to claim 1, characterized in that the pipe sections (32 to 34) around their longitudinal axis on the spray disc (17) can be rotated and adjusted.