JPH069736Y2 - Gypsum mold crushing device in gypsum casting - Google Patents

Description

[Detailed description of the device]

[Industrial applications]

The present invention relates to gypsum casting for casting metal using a gypsum mold, and more particularly to a device for crushing a gypsum mold after casting.

[Prior art]

Recently, as a method of obtaining precision castings with high dimensional accuracy and clean casting surface in high-mix low-volume production or trial production, etc., after forming a plaster mold based on the master model of the product shape, the metal mold is formed on the mold. Gypsum casting, in which molten metal is injected to obtain cast products, has come to be widely used. In gypsum casting, it is necessary to crush the gypsum mold in order to obtain a product after casting, but this has been conventionally done manually by using various tools for crushing.

[Problems to be solved by the device]

As described above, when the gypsum mold is crushed by hand, it requires a lot of man-hours, but the product is easily deformed or the surface is easily damaged.
In particular, when the metal to be cast is a soft metal such as an aluminum alloy or a zinc alloy, this tendency is particularly strong. In view of the above-mentioned present situation, the present invention was created as a result of earnest studies on the development of a device capable of automatically performing the crushing work of a gypsum mold without deforming the product or damaging the surface. .

[Means for solving problems]

That is, the present invention is directed to a hermetically-sealed housing for accommodating crushed objects, a plurality of high-pressure water distribution pipes vertically inserted in the hermetically-sealed housing so as to be rotatable and horizontally movable, and the high-pressure water distribution pipe. The high-pressure water distribution pipe has a rear end rotatably connected to a high-pressure water supply hose via a rotary joint and a high-pressure water injection device at the front end. A plurality of nozzles are arranged in series via a rod-shaped nozzle head, and the nozzles at the tips of the high-pressure water distribution pipes are displaced from each other by 90 ° in the mutual relationship with the nozzles at the tips of the adjacent high-pressure water distribution pipes. In addition, the gypsum mold crushing device in gypsum casting is characterized in that the outermost nozzle position is arranged such that the rotation loci of the nozzles are in contact with each other or slightly overlap each other.

[Action]

The present invention is configured as described above, and a plurality of high-pressure water jet nozzles arranged at the tip of the high-pressure water distribution pipe are arranged in series via a rod-shaped nozzle head, and the plurality of nozzles arranged in series are arranged. , Vertical position adjustment of high pressure water distribution pipe,
By rotating and moving horizontally, it moves horizontally while rotating a predetermined distance from the crushable object, so even a simple device with a relatively small number of nozzles can be used to move to a relatively large crushable object. As a whole, high-pressure water can be easily sprayed. In addition, the nozzles at the tip of the high-pressure water distribution pipe are displaced from each other by 90 degrees in the mutual relationship with the nozzles at the tips of the high-pressure water distribution pipes adjacent to each other via the rod-shaped nozzle head, and the outermost nozzle position is When the high-pressure water distribution pipe is rotated, the rotation loci of the nozzles are arranged so as to be in contact with each other or slightly overlap each other, so that a plurality of nozzle heads freely rotate without being interfered with each other by adjacent nozzle heads, High-pressure water can be sprayed on a crushed object having a relatively complicated shape in a state where there is no unevenness on the whole.

【Example】

An embodiment of the present invention will be described with reference to the drawings. First, the basic structure of the device will be described with reference to FIGS. 1 and 2. (1) is a housing for accommodating the object to be crushed, and the housing (1)
Covers the surroundings to prevent the sprayed high-pressure water from splashing around, but one side is covered with a transparent plate (4) and work with work gloves (39) A hole (49) is provided to allow handling of the crushed material from the outside, and the other one side part is a flexible sheet (such as a rubber sheet) for convenience of putting the crushed material in and out of the casing (1). It is covered with 35) and, in addition, a peripheral cover (36) is also attached to make the peripheral part a double cover in order to complete the seal. Two vertical support plates (2) are erected in parallel on the upper surface of the housing (1), and a horizontal support plate (3) is fixed to the upper end of the vertical support plate (2). A rack (12) is fixed to the lower surface of the support plate (3). Reference numeral (5) is a horizontal feed table, and the horizontal feed table (5) is fitted to the horizontal feed shaft (6) via bearing housings (8) including bearings fixed to both ends of the lower surface. A roller (7) and a gear (13) are fitted to both ends of a horizontal feed shaft (6) supporting the horizontal feed table (5), and the roller (7) is attached to the upper surface of the housing (1). The gear (13) is engaged with the fixed guide rail (25), the gear (13) is meshed with the rack (12), and the gear (10) fitted to the horizontal feed shaft (6) is placed on the horizontal feed table (5). Gears stuck to the output shaft of the mounted horizontal feed motor (11)
Install by engaging with (9). A vertical guide shaft (17) is erected on the horizontal feed table (5), and the vertical guide body (14) is fixed to the upper plate (16) and the lower plate (15) with respect to the horizontal feed shaft. The vertical adjustment screw (1) is slidably fitted through the bearing (19) and is fixed to the lower end of the handle (37) fitted to the support plate (31) fixed to the upper end of the vertical guide shaft.
Install 8) by screwing it into the screw hole provided on the upper plate (16). The high-pressure water distribution pipe (23) has an upper plate (16) and a lower plate on the upper and lower guides (14).
The casing (1) is fixed to (15) and is rotatably supported via a bearing (30) so that the lower end is located above the casing (1).
Nozzle head (27) having a plurality of nozzles (26) is fixed to the lower end, and a waterway rotary joint (21) is connected to the upper end via a joint (24). Has been done. A gear (28) is fitted to the high-pressure water flow pipe (23), and the gear (28) is a motor (20) mounted on the lower plate (15) of the upper and lower guides (14). It meshes with the gear (29) stuck to the output shaft. Incidentally, (32) is a limit switch for determining the movable range of the horizontal feed, and the horizontal feed table (5) is for the limit switch (3
When it comes into contact with (2), it automatically stops and turns over.The bottom of the housing (1) is provided with an outlet (38) for the injected high-pressure water, and the operation panel (33) is fixed on the side. ing. High-pressure water from a high-pressure water generator (not shown) guides vertically
(14) After entering the waterway rotary joint (21) through the joint (24) and the hose (22) fixed to the upper plate (16), the high pressure water distribution pipe (23) is passed through the high pressure water distribution pipe (23). It is jetted toward the crushed material from the nozzle (26) of the nozzle head (27) fixed to the tip of the (23). Therefore, in the device of the present invention, the vertical position of the nozzle head (27) is set by operating the handle (37) to move the vertical guide (14) up and down along the guide shaft (17). The nozzle head (27) is rotated by rotating the high pressure water flow pipe (23) by driving (20), and the nozzle head (27) is moved by moving the horizontal feed table (5) by driving the motor (11). It is possible to move it horizontally. Next, the structure of the nozzle head (27) will be described.
As shown in FIG. 4 and FIG. 4, the thick-walled pipes (41) and (41 ′) are machined with a plurality of female threads (42) and (42 ′) and male threads (43) and (43 ′) to make a nozzle holder ( 44) and (44 ') are formed first, and the nozzle holders (44) and (44') are individually formed, or female threads (42) and (42 ') and male threads are formed.
Nozzles (26) are screwed to the internal threads (42) and (42 ') of the combined body, which are properly connected via (43) and (43'), and sealing lids are screwed to other areas. To form the nozzle head (27). The nozzle head (27) formed as described above is screwed to the lower end of the high-pressure water flow pipe (23) via the male screws (43) and (43 '), and the method of deploying a plurality of nozzle heads is described. The case where two high-pressure water distribution pipes (23) of the embodiment are provided will be described. In this case, the nozzle heads (27) are arranged in such a manner that the rows of nozzles (26) arranged on a straight line are displaced by 90 ° from each other as shown in FIG. 5, and the high pressure water flow pipes (23) are arranged in opposite directions. By rotating the nozzle head (27), when the nozzle head (27) is rotated in the direction of the arrow, the rotation loci of the nozzles (26) arranged on the outermost sides are arranged in such a distance that they contact each other or slightly overlap each other. As a result, the high-pressure water becomes a sprayed state as shown in FIG. 6, but as described above, the arrangement method of the nozzles (26) of the nozzle heads (27) is variously changed according to the shape of the crushed object. It goes without saying that the atomized state of is obtained. For reference, the case where the nozzle head is formed as a plate-like body as shown in FIG. 7 will be described. A notch portion (47) for forming a water channel and a male screw portion for screwing the high pressure water distribution pipe (23). The upper plate (45) formed with (46) and the lower plate (48) formed with the female screw (49) for screwing the nozzle (26) are screwed together.
Formed by combining at (50). In this case, the larger the diagonal distance of the nozzles to be arranged, the larger the channel area becomes, and in this case, the plate-like bodies (45) and (4
The relationship between the plate thickness (t) in 8) and the pressure (P) of high-pressure water is as follows. Therefore, when the water channel area, that is, the pressure receiving area (A) is large and the pressure (P) of the high-pressure water is large, it is necessary to increase the plate thickness (t), which causes a problem that the nozzle head first becomes large. Next, it is impossible to dispose the nozzle heads adjacent to each other at a distance such that the rotational loci of the outermost nozzles are in contact with each other or overlap each other, because the nozzle heads interfere with each other during rotation, and therefore FIG. There is a problem that it becomes impossible to obtain a jetting state that enables uniform jetting to the crushed material as shown.

[Effect of device]

The present invention has the configuration and operation as described above, and its effect is to crush the gypsum mold in gypsum casting with a simple device having a relatively small number of nozzles, and to uniformly generate high-pressure water in any shape. The automatic injection contributes to smooth work and improved work efficiency and quality.

[Brief description of drawings]

FIG. 1 is a rear view showing a part of the present invention in section, FIG. 2 is a side view showing a part of the present invention in section, and FIGS. 3 and 4 are sectional views showing the structure of a nozzle head of the present invention. 5 and 6 are a layout view of the nozzle head of the present invention, and FIGS. 7 (a) and 7 (b) are a sectional view and a plan view of the conventional nozzle head. 1 ... Housing, 5 ... Horizontal feed base 6 ... Horizontal feed shaft, 11 ... Horizontal feed motor 14 ... Vertical guide body, 20 ... Head rotation motor 23 ... High-pressure water distribution pipe, 26 ... Nozzle 27 ... Nozzle head, 37 ... Vertical adjustment Handle 44 ... Nozzle holder

Claims (1)

[Scope of utility model registration request] 1. A hermetically-sealed housing for accommodating a material to be crushed, a plurality of high-pressure water distribution pipes vertically inserted into the hermetically-sealed housing so as to be rotatable and horizontally movable from a top plate, and the high-pressure water distribution pipe. The high-pressure water distribution pipe has a rear end rotatably connected to a high-pressure water supply hose via a rotary joint and a high-pressure water injection device at the front end. A plurality of nozzles are arranged in series via a rod-shaped nozzle head, and the nozzles at the tips of the high-pressure water distribution pipes are displaced from each other by 90 ° in the mutual relationship with the nozzles at the tips of the adjacent high-pressure water distribution pipes. At the same time, the mold crushing device in gypsum casting is characterized in that the outermost nozzle position is arranged so that the rotation loci of the nozzles are in contact with each other or slightly overlap each other.