JPH0121763B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a plurality of vacuum suction holes on one molding surface of the upper and lower molds, connects the vacuum suction holes to a vacuum blower outside the device, and connects the vacuum suction holes to a vacuum blower outside the device. The present invention relates to a cement mortar molded product manufacturing apparatus in which a mold is provided around a mold having holes so as to move up and down with respect to the mold.

[Conventional technical field]

Such a device is disclosed in No. 6 of Japanese Unexamined Patent Publication No. 133111/1983.
Disclosed in fig. In such a device, the type shown in Japanese Patent Publication No. 54-202209, in which a vacuum suction device is not provided on the mold in which the mold frame slides up and down around the mold, may not be usable. For example, if the vertical cross section of the molded product is in the shape of a flower pot, this may be used, but if the vertical cross section is a normal trapezoid, the molding apparatus of the present invention must be used, in which a mold is attached around the upper mold.

[Problem that the invention seeks to solve]

However, the water extraction suction of this type of device has problems with the circulation of the air that conveys the water and the drainage route, and a filtration unit consisting of a wire mesh and dewatering cloth, or a wire mesh and a draining iron plate, contributes to the supply of conveying air. However, in the above type of molding apparatus in which the mold frame blocks the supply of air from the molding surface, it is necessary to actively provide an air supply passage in order to apply a vacuum suction force for squeezing water. Some improvements can be made by communicating the water squeezing suction chamber or water squeezing suction passage connected to the molding surface by a vacuum suction hole with the outside air, It is more effective to use it for transportation. However, the supply of air is also obstructed by the mold, so a relatively long path must be found within the mold.

SUMMARY OF THE INVENTION It is therefore an object of the invention to provide a cement mortar forming device of the type mentioned at the outset, which is improved with respect to the auxiliary supply of conveying air for water extraction suction.

[Means to solve the problem]

This objective can be achieved by providing at least one air inlet in the molding surface, which communicates with the air source via a connecting channel provided in the mold.

[Effect]

With this configuration, air can be supplied through a shorter path in molding equipment that is forced to supply or drain air from the side opposite to the molding surface of the mold. be. In addition, if this air supply port opens from the sliding surface of the mold and the mold to the outer periphery of the upper surface of the molding space, it is necessary to omit any route inside the mold and supply air to the molding surface through an extremely short passage. It has excellent effects such as making it possible to form such passages and making it very easy to form such passages.

〔Example〕

In the following, features of the invention will be explained in more detail with reference to the accompanying drawings, which illustrate some embodiments of the invention.

Figure 1 shows an embodiment of a cement mortar molded product manufacturing apparatus in which a lower mold is provided at the upper end of a press piston that moves up and down, and a water extraction suction port is provided in the upper mold. A support stand 4 is fixed to the upper end of the hydraulic piston 2 which moves up and down via a piston rod 3, and a lower mold 5 (shown where the molding material M is supplied) is fixedly arranged on the upper surface of the support stand 4. Above the lower mold (mold stand) 5 is a machine frame (not shown).
A sliding block 7 is slidably supported on the lower surface of the upper mounting base 6 provided on the upper mounting base 6, and the sliding block 7 has a piston rod connected to a piston 9 that slides within an air cylinder 8 mounted on the upper mounting base 6. 10 ends are fixed. An upper mold 11 is attached to the lower surface of the sliding block 7, and a plurality of vacuum suction holes 13 are drilled at regular intervals on the lower surface, which is the molding surface. A mold frame 14 is provided on the outer periphery of the lower part of the upper mold 11 so as to be movable up and down by a cylinder 15a. The vacuum suction hole 13 is connected to the outside of the device via the water squeezing suction passage or the water squeezing suction chamber 15 provided in the upper mold 11, the water squeezing outlet 16 provided in the formwork 14, and the connecting pipe 44 (end shown). It is connected to a vacuum source, such as a vacuum blower. Piston rod 10 of sliding block 7
A raw material supply device 18 is provided on the side opposite to the side connected to. The sliding block 7 moves horizontally between two positions. In one position (the position shown in FIG. 1), a molding space can be formed with the lower mold 5 and the raised upper mold 11 and mold frame 14. The other position is a pedestal 20 that moves up and down with a cylinder 19.
The lower surface 12 of the upper mold is vertically aligned at this position, and the molded product conveyed by the upper mold 11 after molding can be delivered to the pedestal 20 at this position. The mold frame 14 around the upper mold 11 still surrounds the sides of the molded product after molding, and the pedestal 20
It remains in that state until it is delivered to the molded product, at which point it rises and leaves contact with the molded product.

2 to 7 are enlarged sectional views of the upper and lower molds when molding is completed, respectively, showing five embodiments of the apparatus of the present invention.

Referring to FIG. 2, the lower surface 12 of the upper mold 11
communicates with a water squeezing suction chamber 15 through a vacuum suction hole 13. A known draining device, ie, a filtration unit 41 consisting of a dewatering cloth, a wire mesh, or these and a draining iron plate is attached to the lower surface 12 of the upper mold, and is in contact with the molded product P. A water squeezing suction chamber 15 is formed inside the upper mold 11, and the upper part thereof is closed by an upper lid 42. A water squeezing outlet 16 is bored at one location on the outer periphery of the formwork 14, one end of which communicates with the water squeezing suction chamber 15 through an opening 43 provided in one side wall of the upper mold, and the other end communicating with the water squeezing suction chamber 15. The end portion 44 of the connecting pipe to be connected is inserted and fixed. Although the bottom of the water squeezing suction chamber 15 and the bottom of the water squeezing outlet 16 move relatively during compression molding,
Since they are almost flush, drainage is extremely easy at a given vacuum suction force. If a hole 45 is bored in the upper lid 42 of the upper mold 11 and the water squeezing suction chamber 15 is communicated with the outside air, it is possible to receive an auxiliary supply of air to convey the water accumulated in the water squeezing suction chamber 15. , this hole may be omitted. The main feature of the present invention is that an air supply passage 46 is provided in the formwork 14, and in the embodiment shown in FIG. The air is led to the molding space, particularly to its upper end, through the air supply connecting passage 47 provided in the direction, and is used for squeezing water and releasing the mold. That is, air is supplied between the lower surface of the upper mold and the filtration unit 41. This air transports the water that is squeezed out through the filtration unit during compression and passes through the vacuum suction hole 13 into the water squeezing suction chamber 1.
5, and the water can be easily discharged through the water squeezing outlet 16. Generally, dewatering cloth and wire mesh can be used as the filtration unit 41, but in the case of the present invention, in which air is supplied to the lower surface of the mold, a draining iron plate should be considered indispensable. The connecting passage 47 provided on the sliding surface is
Although it is desirable that the most extreme path be vertical, it is also conceivable that the lower part be inclined. The connecting passage 47 can be easily formed by forming a groove in the surface of the formwork 14 or the mold 11, but it is clear that matching grooves may be provided in both members as long as they are vertical grooves. It is. The air supply passage 46 provided in the formwork 14 is generally considered to be a hole drilled horizontally at an intermediate position in the vertical direction as shown in the figure, but it is also possible to provide the air supply passage 46 horizontally below the hole.
It can also be made unnecessary by providing it at an angle and making the connecting passage 47 short or opening directly into the lower surface of the mold.

The embodiments shown in Figures 3 and 4 are
42011, in which an atmospheric suction pipe 53 for conveying water from a water supply pipe 54 is provided upstream of the water squeezing suction passage 15 of the upper die via a connecting pipe 55,
15 is not a single water squeezing suction chamber as shown in FIG. 2, but is made up of several cylindrical water squeezing suction passages, as is clear from FIG. The connecting portion is a water collecting portion 51 that communicates with all of the water squeezing suction passages 15. The other end of the water squeezing outlet 16 is connected to a connection 17 of a suction pipe connected to a vacuum blower. In this example,
The air supply passage 46 provided in the formwork 14 and the connection passageway 47 provided in the sliding surfaces of the formwork 14 and the mold 11 are provided between adjacent passages so as not to be connected to the cylindrical water squeezing suction passageway 15. Further, as shown in FIG. 3, an air supply passage 62 in the form of an L-shaped hole is provided to introduce air from the upper part of the formwork 14;
and the obstacle of the connection part 17 can be overcome.

The embodiment shown in FIG. 5 does not include the water extraction outlet 16 provided in the formwork 14 in the embodiment shown in FIG. It is guided upward, penetrates the upper lid 42 of the mold 11, and is guided to the outside. In this embodiment, since water must be sucked upward, it is inevitable that drainage will be difficult even with a high suction force. It seems that the hole 45 in the top cover 42 cannot be omitted. In order to improve the effect of the suction and drain pipe 61 as much as possible, the bottom surface of the water squeezing suction chamber 15 in the mold 11 is inclined downward toward the lower end of the suction and drain pipe 61.

The embodiment shown in FIG. 6 is different from the embodiment shown in FIG.
The only difference is that a connecting passage 61 for supplying air to the molding surface is not provided on the sliding surface between the mold frame 14 and the mold 11, but is provided inside the mold 11. There is also not much difference in that the air supply ports are arranged around the molding surface. Some care must be taken in connection with the air supply passage 46 provided in the formwork 14, and the relative movement of the formwork 14 and the upper mold 11 in the vertical direction may cause the connection passage 61 and the air supply passage 46 to be cut off. In order to avoid this, the expanded portion 64 is provided. It is clear that this expanded portion may be provided on the mold 11 side instead of being provided on the formwork 14 as shown.

7 is similar to the embodiment shown in FIG. 3, but the difference is that the air supply connecting passage 71 is provided inside the upper mold 11 instead of on the sliding surface between the mold 14 and the upper mold 11, and While the connecting passage 62 in FIG. 6 is close to the outer periphery, one connecting passage 71 is formed that opens at the center of the molding surface. 1 in the center
Even if two openings are provided, the effect thereof is limited, so it goes without saying that it can be implemented in combination with the systems shown in FIGS. 3 and 6.

As described above, the present invention has been illustrated and explained as an example in which a formwork is provided on the upper mold, and the upper mold moves only horizontally, and the lower mold moves up and down. However, the upper mold moves up and down and the lower mold moves horizontally. It is also possible to apply this method to a type in which the lower mold is provided with a mold and water is squeezed out by vacuum suction from the lower mold, and is considered to be within the scope of the claims of the present invention.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view of a cement mortar molded product manufacturing apparatus according to the present invention, Fig. 2 is a longitudinal cross-sectional view of an upper mold and a lower mold when molding is completed, showing one embodiment of the present invention, and Fig. 3 shows the second embodiment.
A sectional view taken along the line in Figure 4, which is a sectional view taken along the line in Figure 3, similar to the figure.
FIGS. 5, 6, and 7 are also similar to FIG. 2, showing the third, fourth, and fifth embodiments. 5... Lower mold, 11... Upper mold, 13... Vacuum suction hole, 14... Formwork, 15... Water squeezing suction chamber, 15a
... Cylinder, 16 ... Water squeezing outlet, 41 ... Filtration unit, 42 ... Top lid, 43 ... Opening, 44
... Connection pipe end, 45 ... hole, 46 ... air supply passage, 47 ... air supply connection passage.

Claims (1)

[Claims] 1. A plurality of vacuum suction holes are provided on one molding surface of the upper and lower molds, the vacuum suction holes are connected to a vacuum blower outside the device, and a metal mold is installed around the mold in which the suction holes are provided. In a cement mortar molded product manufacturing apparatus in which a formwork is provided to move up and down relative to the mold, at least one air supply port is opened on the molding surface, and the connection passage is provided in the formwork. The cement mortar molded product manufacturing apparatus is characterized in that the device communicates with an air source through a. 2 An air supply port is provided on the outer periphery of the molding surface of the mold, and a passage connected to the air supply port is a groove provided on one or both of the sliding surfaces where the mold and the formwork come into contact, and this groove is provided with the above-mentioned The apparatus according to claim 1, characterized in that the connecting passages provided in the formwork are connected. 3. The device according to claim 1 or 2, characterized in that an expanded portion is provided at an end of the connecting passage provided in the mold that comes into contact with the mold. 4 A passage connecting the air supply port and the connecting passage provided in the formwork is provided in the mold, and an expansion part is provided at the end of the passage in the mold that connects with the connecting passage provided in the formwork. A device according to claim 1, characterized in that: