JPH0121764B2 - - 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. A formwork is provided around the mold with holes so that it can move up and down with respect to the mold, and multiple grooves for air supply passages that communicate with the molding surface are cut on the joint surface of the mold and the mold. This invention relates to a cement mortar molded product manufacturing device.

[Conventional technology]

Such a device is described in Japanese Patent Application Laid-Open No. 59-48106. In this type of device, the outer periphery of the molding surface that has vacuum suction holes during molding is surrounded by the mold, so the guiding air necessary for water extraction by vacuum suction can be taken from between the upper and lower molds. Since this was not possible, an air supply passage was provided facing the molding surface, but due to the presence of the mold, the air supply passage had to be communicated with the vacuum source through a relatively long path above the upper mold.

[Problem to be solved by the invention]

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

[Means to solve the problem]

It has been found that this object can be achieved by connecting the air supply channel groove and the air supply source by means of a connecting channel provided in the formwork.

[Effect]

With this configuration, there is no need to make the vertical dimension of the mold to which the formwork is attached larger than before, and the interior of the mold, which has various passages and chambers, is avoided, making molding easier. It is possible to provide an extremely reliable passage while making position selection and molding operations easy.

〔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 hole 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 a vacuum source outside the apparatus, for example, via a water squeezing suction passage or a water squeezing suction chamber 15 provided in the upper mold 11, a water squeezing outlet 16 provided on the formwork 14, and a suction pipe connection 17. Connected to a vacuum blower. A raw material supply device 18 is provided on the opposite side of the sliding block 7 from the side continuous with the piston rod 10. The sliding block 7 moves horizontally between two positions. In one position (the position shown in FIG. 1), when the lower mold 5 rises, the upper mold 11 and the formwork 14
This is the position where a molding space can be formed. At the other position, the lower surface 12 of the upper mold is vertically aligned with the pedestal 20 which is moved up and down by the cylinder 19, and at this position, the molded product conveyed by the upper mold 11 after molding can be delivered to the pedestal 20. The mold frame 14 surrounding the upper die 11 still surrounds the side surface of the molded product after molding and remains in that state until it is delivered to the pedestal 20, 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 squeeze outlet 16 is drilled at one location on the outer periphery of the formwork 14, and its end is connected to the opening 4 provided in one side wall of the upper mold.
3, and the other end is fitted with an end 44 of a connecting pipe connected to a vacuum blower. The bottom of the water extraction suction chamber 15 and the water extraction outlet 1
Although the bottom of 6 moves relatively during compression molding, since it is almost flush, the structure allows for extremely easy drainage of water under a predetermined vacuum suction force. A hole 45 is bored in the upper lid 42 of the upper mold 11, and the water squeezing suction chamber 1 is opened.
If the hole 5 is communicated with the outside air, air for transporting the water accumulated in the water squeezing suction chamber 15 can be supplementarily supplied, but this hole may be omitted. A feature of the present invention is that a plurality of air supply passage grooves 47 communicating with the mold forming space, particularly the upper end thereof, are provided on the sliding surface, that is, the joint surface, between the formwork 14 and the mold 12. Provided after supplying air for mold release. That is, the formwork 14
Air is supplied between the lower surface of the upper mold and the filtration unit 41 through an air supply passage 46 provided therein and a connecting passage 47 provided on the sliding surfaces of the mold frame 14 and the mold 11. This air transports the water that is squeezed out through the filtration unit during compression to the vacuum suction hole 1.
3 to be led to the water squeezing suction chamber 15, and can be easily discharged through the water squeezing outlet 16. Filtration unit 41
In general, dewatering cloth and wire mesh can also be used, but in the case of the present invention, where air is supplied to the outer periphery of the lower surface of the mold, a draining iron plate is particularly effective. The connecting passage 47 provided on the sliding surface is desirably vertical as its most end path, but it is also conceivable to make the lower part 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. As shown in the figure, the air supply passage 46 provided in the formwork 14 is generally considered to be a hole bored horizontally at an intermediate position in the vertical direction, but it is also possible to provide the air supply passage 46 horizontally below or at an angle. , communication passage 47
It can be made unnecessary by making it short or opening it directly at the bottom of the mold.

The embodiments shown in Figures 3 and 4 are
42011, in which an atmospheric suction pipe for conveying water from a water supply pipe is installed upstream of the water squeezing suction passage in the upper mold, and 15 is a water squeezing suction chamber as shown in Figure 2. Rather, as is clear from FIG. 4, there are several cylindrical water squeezing suction passages, and the portion connected to the water squeezing outlet 16 provided in the formwork 14 communicates with all of the water squeezing suction passages 15. This serves as a water collection section 51. 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 the case of this embodiment, an air supply passage 46 provided in the formwork 14 and a connection passageway 47 provided in the sliding surfaces of the formwork 14 and the mold 11
is provided between adjacent passages so as not to be connected to the cylindrical water squeezing suction passage 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;
Obstacles of the water squeezing outlet 16 and the connecting portion 17 can be overcome.

Figure 5 shows that in the format shown in Figure 2,
The difference is that in FIG.
The upper die 11 is provided with a hole and connected to an air source. Since the water squeezing suction chamber 15 occupies a considerable portion of the internal space of the upper mold 11, it is difficult to provide pipes and holes, but it is not impossible. However, the connection end with the air supply source must be located on the top surface, and the space occupied by the piston 15a that operates the formwork 11 must also be avoided.

In the embodiment shown in FIG. 6, the water extraction outlet 16 provided in the formwork 14 in the embodiment shown in FIG. It is guided to the outside through the upper lid 42 of the mold 11. In this embodiment, since water must be sucked upward, it is inevitable that drainage will be difficult even with a high suction force. The hole 45 in the top cover 42 may be omitted in some cases. In order to improve the effect of the suction and discharge 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 drain pipe 61.

FIG. 7 is a drawing close to FIG. 4, and is a modified example from the embodiment shown in FIGS. 3 and 4. In addition to the connecting passage 47 shown in FIG. A connecting passage 82 is provided which opens into the mold, and communicates with an air supply source through an air supply passage 81 provided in the formwork 14. Such connecting passages can be further combined with spaced arrangements intermediate the center and the outer periphery to more evenly distribute the air supply to the lower surface 12 of the upper mold. The connecting portion between the connecting passage 82 and the air supply passage 82 is different from the embodiment shown in FIG.
Since the connection is made at a point, the expansion part 83 is provided in the formwork 14 or the upper mold 11 so that the connection of the air supply passage is not hindered by the relative movement of the mold 14 and the upper mold 11. It is necessary to provide This expanded portion is also provided in the embodiment shown in FIG. 5 when necessary (connecting passage 4
7 consists of an air supply passage groove cut into the formwork 14).

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 only moves horizontally, while 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 the 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 is the second example showing 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.
5 and 6 are views similar to FIG. 2 showing the third and fourth embodiments, and FIG. 7 is a view similar to FIG. 4 showing the fifth embodiment. 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, a formwork is provided so as to move up and down with respect to the mold, and a plurality of air supply passage grooves are cut in the joining surface of the formwork and the mold, which communicate with the molding surface of the mold. The cement mortar molded product manufacturing apparatus characterized in that the air supply passage groove and the air supply source are connected by a connecting passage provided in the formwork. 2. The device according to claim 1, wherein the air supply passage groove is cut into the mold. 3. The device according to claim 1, wherein the air supply passage groove is cut toward the mold. 4. Claim 1, characterized in that the air supply passage groove is provided in both the mold and the formwork.
Apparatus described in section. 5. The device according to any one of claims 1 to 4, characterized in that the air supply passage groove runs vertically. 6. Claim 1, wherein the air supply passage groove runs at an angle with respect to a perpendicular line.
4. The device according to any one of Items 4 to 4. 7. Claim 1, characterized in that an air supply port is provided on the molding surface by a connecting passage provided in the mold in addition to the air supply passage groove provided on the joining surface of the mold and the mold. 6. The device according to any one of paragraphs 6 to 6. 8. The device according to any one of claims 1 to 7, characterized in that an expanded portion is provided at an end of the air supply passage groove that connects to the connection passage. 9. The device according to any one of claims 1 to 7, characterized in that an expanded portion is provided at an end of the connecting passage connected to the air supply passage groove.