JPH028822B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for wetting mold surfaces with liquid for cooling, cleaning and/or lubrication purposes in pressure casting machines and the like.

PRIOR ART AND ITS DISADVANTAGES In the pressure casting process, prior to casting, it is necessary to wet the inner surfaces of the open mold with a liquid that serves as demoulding, cooling and/or as a lubricant mixture. Such operations are particularly important in preventing liquid casting metal from adhering to the mold walls, since it has a strong adhesion force to the mold walls. This ensures proper release of the casting from the mold wall during casting. This is why a liquid is sprayed as a mold release agent onto the inside surfaces of the mold prior to each new casting operation.
Furthermore, all sliding surfaces of the mold, such as guide pins, ejectors, movable partial bearings (cods), etc., must be lubricated. For this purpose, a liquid is sprayed onto the surface in question, which acts not only as a mold release agent but also as a lubricant. Finally, die casting molds experience significant thermal distortion due to the high temperature of the cast metal. Since the removal of heat from the interior of the mold is related to the wall thickness of the mold and does not occur uniformly throughout its entire outer wall, it is further necessary to selectively cool the mold after casting. Such operations are also accomplished by spraying the mold with a relatively cool liquid.

Expanding the above purpose further, it is known to use a liquid spraying device to selectively spray liquid into the mold between successive die casting operations, and during such operations, the mold It must be ensured that the cavities and/or projections are completely reached by the sprayed jet. It has already been practiced in the past to selectively and vigorously spray a large amount of cooling liquid onto parts of a mold that are particularly overheated, rather than parts that are not exposed to intense heat. For this purpose, spray heads have been developed and manufactured to be individually adjustable to the corresponding mold, each having a row of spray nozzles with an arrangement precisely adapted to the shape of the mold. Such spray heads are therefore used exclusively in conjunction with specific corresponding molds. This means that when changing the mold, the spray head must also be replaced, and must also be stored with the mold, thus adding to the extremely expensive mold, the spray head, etc. It was necessary to manufacture a very expensive spray head consisting of the following: the cost of manufacturing and storing them had to be borne by the customer who ordered each casting.

DE 2411316 describes a spraying device for use in molding machines. The publication specifically provides a spray head having a plurality of spray nozzles which are adjustable in direction and are connected to liquid and compressed air inlets through internal passages of the head. The above inlets are of course connected to the liquid and compressed air tanks. Each spray nozzle is equipped with an adjustable throttle valve to tailor the amount of compressed air and/or liquid to the spray nozzle. The spray head itself is moved via a movable holding device in front of the mold surface to be sprayed.

This type of spray head can be used not only for a single fixed mold, but also for various types of molds because the nozzle arrangement is adjustable. However, applying a spray nozzle array to a new mold takes considerable time, especially adjusting the direction of the individual nozzles and adjusting the flow rate of the throttle valve associated with each nozzle, and these adjustments are only possible through experience. It is determined by relying on it. This means that in many cases, after an initial rough adjustment, a pressure casting operation must be carried out with some further adjustment possibly necessary in terms of quality. Such operations are costly both in terms of materials and time.

Furthermore, in the case of throttle valves installed in known spray heads, so-called "static" valves are involved, which, once adjusted, ensure that the maximum cross-sectional area of the valve remains the same during and before spraying. becomes. However, such "static" valves are prone to clogging, especially if the spray head has not been used for a long period of time or if lubricant rubber remains in the relatively small valve cross-section. Easy to occur.

(Object of the Invention) The object of the present invention is to provide an apparatus suitable for optimally processing various mold surfaces according to their shapes when the mold surfaces are wetted with cooling, cleaning and/or lubricating liquid. There is no need to perform costly adjustments to the jet direction and jet amount each time a different mold is replaced or the mold is renewed and reused, and high-speed automatic die casting operations can be performed reliably without any problems, making it possible to manufacture and reuse so-called spray heads. An object of the present invention is to provide a device for wetting a mold surface with liquid, which makes it possible to reduce storage costs.

(Structure of the Invention) The main part of the present invention is that the spray head is divided into two parts, and one of these parts (which is attached to the automatic die-casting machine via a repositionable holding member) will be simply described below. (referred to as fixed members)
The goal is to include all of the expensive structural components (e.g. valves). A member (referred to as a spray nozzle carrier) that can be easily attached to and removed from one fixed member in the spray head of a die-casting machine.
In this case, only the spray nozzle cooperates, which is adjusted only once with respect to the opposing mold with respect to its spray direction and spray intensity. That is, in the present invention, all the expensive components of the spray device (mainly the valve) remain assembled on one fixed member side, making it applicable to various molds. That is, when changing molds, relatively inexpensive components, i.e. spray nozzle carriers that are applied exclusively to each mold, are stored with each mold and are not used in any practical way when the mold is reused. It can be reinstalled with just a few operations without the need for extensive adjustment work. Moreover, at this time, a major feature of the present invention is that the opening degree of the valve within the fixed member is regulated by an adjustment screw provided on the carrier side.

In addition, the spray nozzle carrier is elongated and almost U-shaped.
This beam is in the form of a beam with a letter-shaped cross section, and is supported in contact with the sealing surface of a block-shaped fixing member.
In addition, by surrounding the fixing member from the sides with the two legs, it is possible to sufficiently protect the valve member, which has a relatively sensitive structure, within the fixing member, and the spray nozzle carrier can be attached to the fixing member. The lateral surrounds of the spray nozzle carrier can be engaged with the fixing member and moved longitudinally into position before being finally screwed onto the spray nozzle carrier.

Due to the relatively large weight of the spray nozzle carrier, it is convenient to provide a longitudinal sliding insertion rib on the inside of both legs, which is inserted into a groove provided in the side wall of the fixing member. . This makes it possible for the spray nozzle carrier to be mounted very easily on the fixing member and fixed by means of a screw in its final position of insertion. A U-shaped sprayer is used to prevent damage to relatively sensitive sealing surfaces and protruding parts therefrom (e.g. O-shaped sealing rings and valve adjustment members) when moving the spray nozzle carrier along a fixed member. It is convenient to provide a certain amount of clearance between the head of the nozzle carrier and the sealing surface of the fixing member. This can be achieved by providing . Note that it is convenient to set such a dimensional difference to be larger than the maximum protrusion length of the member protruding from the sealing surface.

The invention also makes particularly advantageous use of the bisecting nature of the spray head, which allows the spray nozzle carrier to be provided in the form of a projection or other form for cooperating with the adjustment member (limit slider) of the throttle valve. The overall "programming" of all throttle valves can be easily done by simply screwing the adjustment member in from the bottom, and such programming can be done to adjust the spray jet strength required for a given mold. Correctly respond to Therefore, when applying a two-part type spray head to a mold of any shape, it is possible to adjust the spray head to the mold by simply replacing it with a spray nozzle carrier whose screw-in degree has been adjusted in advance. Appropriate liquid, etc., injection conditions can be obtained.

Additionally, in this invention, by using a manually operable adjustment screw as the adjustment member, the plate of the spray nozzle carrier can be reused for other molds even when the corresponding mold is no longer needed. be able to. That is, by simply turning the adjustment screw and adjusting its threading amount, the spray head can be newly "programmed" to the "desired spray intensity" to meet the requirements of other molds that have been changed.

Preferably, the throttle valve is in the form of a feed valve that is pneumatically controlled by control air. A limit slider is provided in the blind hole type valve hole, which is formed by appropriately changing the cross-sectional area in stages, and this limit slider partially protrudes from the sealing surface and cooperates with the adjustment member at the facing position. Using this as an adjustment screw, the opening degree of the throttle valve can be adjusted by air pressure. If it is not necessary to forcefully adjust the opening degree of the lever, the adjustment screw and limit slider may be separated.

Inside the throttle valve, a compression spring is associated with the end face of the limit slider, the other side of which abuts against the face of the adjusting piston of the valve. The adjusting piston receives compressed air on the inner side of the valve, ie on the side facing away from the limit slider, and compresses the compression spring to open the valve by being pushed towards the limit slider. Therefore, the sliding movement of the adjusting piston, ie, the opening degree of the valve, is limited by the axial position of the limit slider.

Further inside the valve, the adjusting piston is associated with a lock slide via an intermediate member, for example a control rod, which in the closed position closes with its side surface the passage of liquid into the valve bore; In its open position, the adjusting piston opens the liquid passage more or less when it approaches the limit slider, the rate of such opening being dependent on the adjusting member in the spray nozzle carrier. In this connection, the above-mentioned valve elements (limit slider, spring, adjusting piston, intermediate control rod) allow the "programmed" positioning of the adjusting element in the spray nozzle carrier to be controlled by the locking slider to open the liquid passage. Affects degree.

A safety screw or A safety mechanism is provided in the form of a self-locking plastic insert.

In order to carefully handle the adjustment member of the throttle valve that feeds the spray liquid, specifically the protruding part of the limit slider, the spray nozzle carrier is first attached to the fixed member with a gap interposed between it and the lower surface of the fixed member. It is preferable to move it to the sliding end position, and in this fixed position, it is fastened to the fixing member by a plurality of retaining screws. Due to this fastening, the sealing surfaces of both members come into contact with each other and the fluid passage is sealed from the outside. At the same time, the adjustment position programmed in the spray nozzle carrier is transferred to the limit slider, thereby regulating the amount of spray liquid passing through the throttle valve to a predetermined amount.

Furthermore, in the present invention, in order to prevent malfunctions during long-term use, a series of adjustment members (adjustment screw, limit slider, and adjustment piston) are provided with a central hole extending in the axial direction, in case the adjustment piston does not move. In the event that the parts become loose, it is preferable that they can be manually moved very easily from the outside by inserting hooks or the like to unfasten the parts.
Further, by providing an elastic buffer member such as a rubber ring between the adjusting piston and the limit slider, the parts can be handled more carefully, such as by reducing the impact between the parts.

Fine control of the amount of fluid passing through is achieved by forming a specially shaped flow path in the lock slider.

When the spray nozzle carrier is removed, all fluid passages in the block-shaped fixing member open at the end face, making cleaning easy, and when removing the fluid delivery valve for cleaning or repair.
This is possible by removing one stop screw.

Attaching the spray nozzle to the free end of a flexible spray tube not only facilitates directional adjustment of the spray jet, but also brings the spray nozzle in close proximity to the part of the mold to be sprayed. This makes it possible to obtain extremely high spray intensities. By attaching each spray nozzle to the tip of the tube via a spherical seat, it is possible to sufficiently spray the undercut of the mold. Since each spray tube is screwed to the spray nozzle carrier, spray tubes having various lengths and cross-sectional areas can be attached to the spray nozzle carrier like extended spider legs. Furthermore, it is convenient to place a compressed air nozzle fixed in a separate air tube close to the liquid spray nozzle;
After the spraying operation, the spray liquid can be partially or completely blown away by means of an air tube. The spray nozzle for atomizing the liquid is preferably screwed onto the free end of the spray tube, which facilitates replacement and/or cleaning of the nozzle.

To fully automate die casting operations,
Conveniently, a retaining member, such as the well-known motor-driven jib, is attached to the frame of the die-casting apparatus via a horizontally and vertically sliding and pivoting mechanism. In order to intentionally supply control air to the individual valves of the supply valve group, an input mechanism controlled based on a stored program is provided to spray the air after the mold is opened and the cast blank is removed. Preferably, the head is automatically moved into position and starts the spray cycle.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

The device 10 for wetting the mold surface 12 with a cooling, cleaning and/or lubricating liquid is intended for use in a pressure casting device 14, which includes a bed 16 and supports erected thereon. 18 and 20. An immovable first mold half 22 is fixed to the column 20, and a hydraulic device 24 is attached to the column 18, and the hydraulic device 24 moves a carriage 26 to the second mold half fixed thereto. It is capable of sliding together with the split portion 28. In Figure 1,
Two first mold half parts 22 and second mold half parts 2
8 forms a closed pressure casting mold as shown by the tangent line 30 to the diamond.

A pouring device, indicated generally at 32, is provided at one end of the bed 16 for directing the casting material into the closed mold.

The device 10 for wetting mold surfaces with liquid has a spray head 40 with a plurality of spray nozzles 42 suitable for directional adjustment and liquid and compressed air inlets. A passageway 44 is provided within the spray head 40 to guide compressed air or liquid at the inlet to the spray nozzle 42. Also, inside the spray head 40 there is liquid and/or liquid that reaches the spray nozzle 42.
Alternatively, a throttle valve 46 is provided that can directly adjust the amount of compressed air. The spray head 40 has a retaining member 50 or a fixed member 48 attached to the column 20 via a horizontally and vertically slidable and pivotable mechanism 52. A spray nozzle carrier 54 having a plurality of spray nozzles 42 is replaceably mounted on the fixing member 48 of the spray head 40. As seen in FIGS. 3 and 4, the fixing member 48
Therein are liquid passages 44, 110, compressed air passages 120, and a throttle valve 46 with a lock slider 104. The spray nozzle carrier 54 is a relatively simple member having a passage hole 56 whose inner end 58 is aligned with the outlet opening 60 of the passage 44 and whose outer end 62 is aligned with the outlet opening 60 of the passage 44. It is connected to the spray nozzle 42 via a spray tube 132.

As shown in FIG. 2, the spray nozzle carrier 54 is formed in the shape of an elongated beam with a U-shaped cross section, and the inner surface of the head 64 is brought into contact with the lower sealing surface 66 of the block-shaped fixing member 48 and fixed. The member 48 is laterally surrounded by two legs 68, 70. In order to enable the spray nozzle carrier 54 to be slid along the fixed member 48 in its longitudinal direction, a slidable insertion rib 7 engages in a wide longitudinal groove 78 formed in the side walls of the fixed member 48 .
6 denotes longitudinal legs 68, 70 of the carrier 54;
It protrudes from the inner surface 74 of. When the spray nozzle carrier 54 is slidably coupled to the fixed member 48, there is an initial gap between the upper surface of the head 64 of the carrier 54 and the lower surface 66 of the fixed member 48.
This is because a gap 84 is formed between the side wall 80 of the longitudinal groove 78 on the side surface of the fixing member 48 and the side surface 82 of the insertion rib 76 in the final installed state, as shown in FIG. This is because the gap 84 is configured in advance.
is set to be larger than the maximum protrusion length of a member that protrudes downwardly from the sealing surface 66, such as a portion of a throttle valve, such as the limit slider 92, which will be described in detail below.

Throttle valve 4 provided on fixed member 48
6 is adjustable, and in order to make such adjustment, an adjusting member that acts on the throttle valve 46 with a simple mechanism is connected to the spray nozzle carrier 54.
It is set in. In the illustrated embodiment, such an adjustment member is located on the spray nozzle carrier 5.
4 is a manually rotatable adjustment screw 86 equipped with a socket-shaped head cap that is screwed into a tapped hole 88 formed coaxially with the central axis of the valve 46;
An inner end 90 of the adjusting screw 86 abuts a limit slider 92 that partially projects from the sealing surface 66 from below.

A detailed structure of a particularly preferred embodiment of the throttle valve 46 is shown in FIG. The throttle valve 46 is configured as a feed valve that is pneumatically controlled by control air and is arranged in the valve bore 94 . As already mentioned above, these consist of a limit slider 92 cooperating with the adjusting screw 86 and a surface 98 remote from the limit slider 92 (upper surface) to which control air coming from an air passage 120 is applied and compresses the lower surface 100. and an adjusting piston 96 supported by a limit slider 92 via a spring 102, and as is clear from the sectional view of the adjusting screw 86 in FIG. 4, depending on the axial position of the limit slider 92. The sliding movement of the adjusting piston 96 is limited. Further, although not shown in FIG. 4, a lock slider 104 (see FIG. 3) is provided, and this lock slider 104 is connected to the control rod 10.
6 to the adjusting piston 96 and which flows from the passage 44 into the valve bore 94 by its side surface 108 in the upper closed position.
block. Also, in the open position, in which the adjusting piston 96 is located in close proximity to the limit slider 92 by means of control air acting on its upper surface, the lock slider 104 controls the liquid passage 110 according to the preset position of the adjusting screw 86. to open at least a portion of the

The screwing position of the adjusting screw 86 is fixed by an adjacent safety screw 112 so that the tightening position does not change by itself during long-term use or storage of the spray nozzle carrier 54. The final mounting position of the carrier 54 relative to the fixing member 48 as shown in FIG. 3 is achieved by a plurality of retaining screws 114. In this state, the smooth upper surface of the head 64 of the spray nozzle carrier 54 is in close contact with the lower sealing surface 66 of the fixing member 48, and conversely, the groove 7 on the side surface of the fixing member 48 is in close contact with the lower sealing surface 66 of the fixing member 48.
A gap 84 is formed between the side wall 80 of the carrier 8 and the rib side surface 82 of the carrier 54 facing thereto.

4, the adjustment screw 86, the limit slider 92, and the adjustment piston 96 each have a central hole 116 that extends axially and is aligned with one another so that the lock slider 104, which can be released by means of a hook-like member when the lock slider 104 is to be removed.

The compression spring 102 is an annular elastic buffer member 1
18 to prevent a violent collision between the adjusting piston and the limit slider when control air enters through the control air passage 120.

FIGS. 5-7 show alternative embodiments of the upper end of the lock slider 104, with grooves in FIG. 5 and recesses 122 in the sides in FIG. In FIG. 7, it is formed to have a truncated conical shape.

In order to secure the adjusting screw 86 against loosening, the threaded part is provided with a plastic insert 124 which forms part of the outer wall of the screw and which gives the adjusting screw a kind of self-locking ability. Figure 4).

The limit slider 92 faces the spray nozzle carrier 54 in its final position, such final position being determined by a stop screw 126 extending parallel to the valve bore 94. The stop screw 126 is adapted to prevent the limit slider 92 from moving outward in the axial direction by a portion of its head 128.

The spray nozzle 42 is mounted on the free end 130 of a flexible spray tube 132, and the mounting end 134 of the tube has a mounting screw ( A cap screw 136) is provided. Also located near the spray tube 132 is a similarly fixed nozzle tube 140, the free end of which is provided with a compressed air nozzle 44.

The spray nozzles 42 are connected at their spherical bases by cap screws to the free ends 130 of their respective spray tubes 132 and are individually rotatable about the tube axis at the free ends 130.

In addition, the control device 14 is based on a stored program in order to directly supply control air to the individual throttle valves 46 or groups thereof.
Two types of input devices are mounted on the casting apparatus column 20, and such devices are used to simultaneously control the hydraulic system 24 and/or the casting apparatus 32 as well.

(Effects of the Invention) The most characteristic structure of the device for wetting the mold surface with liquid according to the present invention is that a movable spray head is provided between the opposing surfaces of an open mold in a pressure casting device or the like. The main body is a fixed member, and the spray nozzle carrier is an exchangeable spray nozzle carrier that is combined with the main body at the sealing surface. The spray nozzle carrier is equipped with separate inlets and passages for cooling, cleaning and/or lubricating liquid and compressed air to be injected into the mold, as well as an appropriate number of throttle valves, allowing the spray nozzle carrier to optimize the spray process according to the shape of each mold. It has a required number of spray nozzles, each with a suitably curved tube, to accomplish this.
When a spray nozzle carrier is combined with a fixed member, the fluid outlet on the fixed member side and the fluid passages leading to each nozzle on the carrier side are naturally aligned.
Thus, the fixed member, which generally has multiple relatively expensive throttle valves, is used only once for various molds.
For each mold of various shapes, a dedicated spray nozzle carrier in which spray nozzles are placed at appropriate positions is used interchangeably. Spray nozzles are much cheaper than valves, and the exclusive use of spray nozzle carriers as described above actually improves the efficiency of casting operations. In order to quickly replace the nozzle carrier, the fixing member and the spray nozzle carrier have a structure in which the fixing member and the spray nozzle carrier engage with each other through side grooves and ribs, move relative to each other in the longitudinal direction, and are tightened at a predetermined combination position. It's summery.

A further important feature of the device of the invention is that each throttle valve has an adjusting piston that moves under pneumatic pressure into a respective valve hole in the stationary member and regulates the passage of liquid, and an adjustment piston adjacent to the piston via a compression spring. It has a Mituto slider,
The spray nozzle carriers each have an adjusting screw at a position facing the limit slider when assembled to the fixing member. With this configuration, when each adjustment screw is screwed in in advance to its respective predetermined position and the spray nozzle carrier is assembled to the fixing member, the limit slider facing each adjustment screw is pushed by the adjustment screw to its position. is regulated. Therefore, each throttle valve's regulating piston receives a different back pressure through its respective compression spring, and when receiving a constant pressure of control air, each valve maintains a different opening and adjusts the specific liquid required by each spray nozzle. Achieve spray strength. Furthermore, such spray strength for each nozzle can always be obtained by replacing nozzle carriers adjusted in advance to match the mold with a fixed member. Thus, the apparatus of the present invention reduces the costs associated with spray heads that have traditionally been borne by each casting customer, and also improves casting efficiency by quickly replacing spray nozzle carriers that do not require adjustment each time they are replaced. It has excellent effects such as increasing work efficiency.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Figure 1 is a schematic front view of a pressure casting apparatus equipped with a device for wetting the mold surface, and Figure 2 is a spray nozzle carrier with the fixing member removed. Fig. 3 is a sectional view of the spray head after installation is completed, Fig. 4 is a sectional view of the part of the spray head where the throttle valve and adjustment screw are installed, and Fig. 5 is a perspective view showing the spray head together with the spray head. The drawings are a sectional view corresponding to FIG. 4 of another example of the valve, FIG. 6 is a sectional view of still another example of the valve part, and FIG. 7 is a sectional view of still another example of the valve part. 10... Device for wetting the mold surface with liquid, 12
... Mold surface, 14 ... Pressure casting device, 40 ... Spray head, 42 ... Spray nozzle, 44 ... Passage, 4
6...throttle valve, 48...fixing member, 50...
Holding member, 54...Spray nozzle carrier, 56
...passage hole, 58...inner end, 60...exit opening, 62...
Outer end, 66...Sealing surface, 86...Adjustment screw, 92...
Limit slider, 94...valve hole, 96...adjustment piston, 102...compression spring.

Claims (1)

[Scope of Claims] 1. A spray head with at least one directionally adjustable spray nozzle, the spray head having a liquid and compressed air inlet connected to a supply line and a liquid or compressed air inlet at this inlet location. and an adjustable throttle valve for directly regulating the amount of compressed air and/or liquid introduced into the spray nozzle, the mold surface to be sprayed by a movable holding member. It is configured to be movable in front of the mold and is used in pressure casting equipment etc. to wet the mold surface with liquid for cooling, cleaning and/or lubrication.
The spray head 40 is a device for wetting a mold surface with a liquid, and the spray head 40 is composed of a fixing member 48 and an exchangeable spray nozzle carrier 54 that is assembled with the fixing member at a sealing surface 66. 48 is the entrance, the passage 44
and a suitable number of the throttle valves 46 connected to the retaining member 50, the spray nozzle carrier 54 having an inner end 58 aligned with an outlet opening 60 of one of the passageways 44 and an outer end 62 aligned with the spray nozzle 42. The throttle valve 46 has a passage hole 56 connected to the valve hole 94, and an adjusting piston 96 that moves under air pressure in the valve hole 94 to regulate the passage of liquid, and a compression spring 102 connected to the adjustment piston 96.
and a limit slider 92 adjacent to the spray nozzle carrier 54 via the fixed member 48.
This limit slider 92 when combined with
By having an adjustment screw 86 at a position facing the limit slider 92, and screwing this adjustment screw 86 to a predetermined position in advance to regulate the position of the limit slider 92,
The liquid spray intensity specific to the spray nozzle carrier 54 is determined by fixing the nozzle carrier 54 with a fixed fixing member 4.
A device for constantly wetting the mold surface with liquid, which can be constantly obtained by combining interchangeably with 8. 2. The spray nozzle carrier 54 is formed by an elongated, substantially U-shaped beam, the head 64 of which is in close contact with the sealing surface 66 of the block-shaped fixing member 48, and the two legs 68, 70 sealing the fixing member. 4. A device for wetting a mold surface with a liquid as claimed in claim 1, wherein the device is configured to laterally surround the mold surface. 3 A longitudinal sliding insertion rib 76 projects from the inner side 74 of the legs 68 , 70 of the spray nozzle carrier 54 .
A device for wetting a mold surface with a liquid according to claim 2, wherein 6 is inserted into a corresponding longitudinal groove 78 provided in the side wall of the fixing member 48 in the final assembled state. 4. A gap 84 is formed between a side wall 80 of the groove 78 on the side of the spray nozzle carrier and a side surface 82 of the sliding insertion rib 76 facing the side wall 80 when the sealing surface 66 is in close contact with the side wall 80 of the groove 78. A device for wetting a mold surface with a liquid according to claim 3. 5 The gap 84 is the sealing surface 66 of the fixing member 48
5. The device for wetting a mold surface with a liquid as set forth in claim 4, wherein the limit slider 92, the set screw, and the sealing member are set to have a maximum protrusion length larger than the maximum protrusion length. 6. The adjusting screw 86 is attached to a threaded hole 88 of the spray nozzle carrier 54 and extends substantially coaxially with the axis of the throttle valve 46, and has an inner end 90 partially protruding from the sealing surface 66. For wetting the mold surface with liquid according to claim 1, the limit slider 92 abuts against the compression spring 102 and moves the limit slider 92 to limit the pneumatic movement of the adjusting piston 96. equipment. 7 The throttle valve 46 is a fluid supply valve that is pneumatically controlled by control air, and the limit slider 92 and the limit slider 92 are disposed in the valve hole 94 substantially coaxially with each other. An adjustment piston 96 receives control air on a surface 98 remote from the piston and is supported by the adjacent limit slider 92 via a compression spring 102 to limit its sliding movement, and an intermediate member such as a control rod 106 A liquid passageway 110 in the fixing member 48 is connected to the regulating piston 96 and in its closed position leads to the spray nozzle.
and a lock slider 104 for opening a part of the liquid passage 110 in accordance with the movement of the adjustment piston 96 whose movement is restricted by the adjustment screw 86 in the open position. A device for wetting the mold surface with a liquid according to item 6. 8. The device for wetting a mold surface with liquid according to claim 6, wherein the screwed-in position of the adjustment screw 86 is held constant for a long period of time by a safety mechanism such as a safety screw 112. 9 After the spray nozzle carrier 54 has been inserted into the final sliding position in mutual engagement of the sliding insertion rib 76 and the grooved side wall 80, the spray nozzle carrier 54 is inserted into the locking screw 114 provided therein. The sealing surface 66 of the fixing member 48
At the same time, the screwing position of the adjustment screw 86 is adjusted to the limit slider 9.
7. A device for wetting a mold surface with a liquid according to claim 6. 10 The aforementioned adjustment screw 86 and limit slider 9
2 and the adjusting piston 96 are provided with a central hole 116 coaxially extending therethrough.
A device for wetting the mold surface with liquid as described in Section 1. 11. The device for wetting a mold surface with liquid according to claim 7, wherein an elastic buffer member 118 is provided between the limit slider 92 and the adjusting piston 96. 12 The lock slider 104 has at its end remote from the adjustment piston 96 one of an axial groove, a conical tip, or a side recess 122 that communicates the liquid passage 44 and the liquid passage 110 in the open position. An apparatus for wetting a mold surface with a liquid according to claim 7. 13. The mold surface according to claim 8, wherein the adjusting screw 86 has a plastic insert 124 in its threaded part, which forms a part of the outer part of the threaded part, so that rotation is prevented. the end of the limit slider 92 facing the spray nozzle carrier 54 is limited by a stop screw 126;
26 extends substantially parallel to the adjacent valve hole 94 and is configured to restrict axially outward movement of the limit slider 92 by a portion of its head 128. A device for wetting the mold surface described with liquid. 15. The spray nozzle 42 is provided at the free end 130 of a flexible spray tube 132.
A device for wetting a mold surface with a liquid according to any one of Item 4. 16. The mold according to claim 15, wherein the spray tube 132 is provided with a cap screw 136 at its mounting end for threading with a counter-screw, such as a threaded adapter 138, provided on the spray nozzle carrier 54. A device for wetting surfaces with liquid. 17. The spray nozzle carrier 54 is provided with at least one compressed air nozzle 144 attached to a nozzle tube 140, and the compressed air nozzle 144 is supplied with compressed air through the fixing member 48. An apparatus for wetting a mold surface with a liquid according to any one of Items 1 to 16. 18. The mold according to claim 15, wherein the spray nozzle 42 is attached to the free end 130 of the corresponding spray tube 132 and is configured to be pivotable relative to the free end 130 of the tube shaft. A device for wetting surfaces with liquid. 19. The device for wetting a mold surface with liquid according to claim 1, wherein the holding member 50 is constituted by a motor-driven jib, and is attached to the frame of the die-casting device via a support 20. . 20. The method of claim 1, wherein a control device 142 based on a stored program for supplying control air to individual throttle valves 46 or groups thereof is attached to the pressure casting machine frame. A device for wetting the mold surface with liquid.