JPH0155966B2 - - Google Patents

Description

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

[Conventional technology]

In this type of upper mold, the mold frame moves up and down, so fluid cannot be supplied directly from the molding surface.
Further, such an apparatus provided with an air supply connection passage communicating with the molding surface is described in Japanese Patent Application Laid-open No. 48106/1983. On the other hand, with this type of molding, when molding is completed and the upper mold is lifted, the transport and delivery of the molded product is relatively smooth due to the operation of the mold, so there is no need to supply air to the molding surface. . However, even if a blower is operated when squeezing water during molding, air for transporting water cannot be obtained from the molding surface.

In addition, an atmospheric suction pipe is installed in the water extraction suction chamber.
A complicated structure in which the atmospheric suction pipe is provided around the water supply pipe is shown in the above-mentioned document and Japanese Utility Model Application No. 58310/1983. However, although this has good performance, it has a complicated structure.

[Problem to be solved by the invention]

Therefore, the object of the present invention is to produce a cement mortar molded product with a simple structure that improves the water squeezing suction effect of the water squeezing suction chamber during compression molding in a type of molding equipment in which a vertically movable formwork is provided around the upper die. We are in the process of providing equipment.

[Means to solve the problem]

In order to achieve this objective, the present invention provides an auxiliary air intake hole by drilling a simple connecting passage that opens on the top surface of the upper mold and communicates with the atmosphere in the wall of the water squeezing suction chamber connected to the vacuum suction hole. It is an object of the present invention to provide a cement mortar molded product manufacturing apparatus characterized by the following.

[Effect]

With such a configuration, even if the supply of air necessary for water squeezing on the molding surface between the mold and the molded product is insufficient, water that tends to accumulate in the water squeezing suction chamber can be removed by the auxiliary intake hole of the present invention. The water conveying power is increased by obtaining auxiliary air supplied through the mold, which plays the role of replacing or supplementing the air supply from the molding surface that is blocked by the formwork, and has an extremely simple structure. This can be achieved by various means.

〔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 2 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 to which the upper mounting base 6 is attached. 10 ends are fixed. An upper mold 11 is attached to the lower surface of the sliding block 7 via a mounting portion 11A, and a plurality of vacuum suction holes 13 are drilled at regular intervals on the lower surface, which is a molding surface. A mold frame 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 water squeezing suction chamber 15 provided in the upper mold 11, the water squeezing outlet 16 provided in the formwork 4, and the connecting pipe 44 (end shown). It is connected to a vacuum source, such as a vacuum blower. A raw material supply device 18 is provided on the opposite side of the sliding block 7 from the side connected to the piston rod 10. Sliding block 7 is 2
move horizontally between two positions. In one position (the position shown in FIG. 1), a molding space can be formed in which the lower mold 5 and the upper mold 11 and the mold frame 14 are raised. The other position is such that 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.
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 the delivery position is raised and it leaves contact with the molded product.

1, 3 to 6 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. 1, 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 dehydrating cloth and a wire mesh or 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 its upper wall is closed by an upper lid 42. A water squeezing outlet 16 is drilled 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 at the upper end, and the other end connected to a vacuum blower. The end portion 44 of the connecting pipe 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.

The cross-sectional size of the water squeezing outlet 16 can be selected within the range necessary for the suction force of the vacuum blower depending on the relative movement amount of the upper mold 11 and the mold frame 14 in the vertical direction from the start to the end of molding. It is desirable that the cross-section of the opening 43 be in the shape of an ellipse that is long vertically.
Even relative movement between the formwork and the mold during operation can be prevented from having a significant effect on the flow rate at the water extraction outlet.

In particular, the present invention is characterized in that an auxiliary air intake hole 45 is bored in the upper lid 42 of the upper mold 11 forming the upper wall of the water squeezing suction chamber 15 to communicate the water squeezing suction chamber 15 with the outside air. It is possible to replenish the air for conveying the water accumulated in the tank 15. If the upper lid 45 is thick as shown in FIG. 2, it is better to bend the path connecting to the intake hole 45 in order to take in outside air at the side wall. The cross-sectional size of the intake hole 45 must not be too large so as not to weaken the water squeezing action from below.

In the embodiment shown in FIG. 1, if the suction and water extraction from the vacuum suction hole 13 are insufficient, as shown in FIG.
It is preferable to provide a plurality of air intake passage grooves 47 communicating with the mold forming space, particularly the upper end thereof, on the sliding surface, that is, the joint surface, between the formwork 14 and the mold 12. serve a purpose. In other words, the filtration unit 4
1 can generally be used with dehydrating cloth and wire mesh, 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. Although it is desirable that the connecting passage 47 provided on the sliding surface be vertical as its shortest path, it is also possible 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 intake passage 46 provided in the formwork 14 is generally considered to be a hole drilled horizontally at an intermediate position in the vertical direction, but it is also possible to provide the intake passage 46 horizontally below or at an angle. Connecting passage 4
7 can be made unnecessary by making it short or opening it directly on the bottom surface of the mold.

Figure 4 shows that in the format shown in Figure 3,
The difference is that in FIG.
In contrast, an air supply passage 71 is bored in the upper mold 11 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 end of it must also be connected to the formwork 1.
It is necessary to avoid the space occupied by the piston 15a that operates the piston 15a.

In the embodiment shown in FIG. 5, the water squeezing 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, water must be sucked upwards, so a higher suction force than usual is required. 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 has an auxiliary intake hole 45 provided in the side wall instead of the auxiliary intake hole 45 provided in the upper wall of the embodiment shown in FIG.
5' is shown. The auxiliary air intake hole may also face the bottom wall, and the supply end may be at the upper end as shown in the figure, or may be at the upper part of the side wall of the upper mold 11 where the form frame 14 is exhausted.

In order to attach the apparatus shown in the embodiments of FIGS. 1 and 3 to 6 to the sliding block 7 shown in FIG. It is sufficient to extend it upward and fix it directly to the block 7 or to the mounting portion 11A shown in FIG.

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 considered that this method can also be applied to a type in which the upper mold is provided with a mold and water is squeezed out by vacuum suction from the lower mold, and does not depart from the scope of the claims of the present invention.

〔Effect of the invention〕

As described above, since the upper surface of the molded product is surrounded by the mold 14 during molding, the vacuum suction hole 1
The water squeezing suction from 3 is insufficient, but the water squeezing suction chamber 1
Auxiliary air supply hole 45 communicating with the atmosphere on the upper wall 42 etc. of 5
By providing this, it is possible to achieve a simple yet extremely effective water squeezing and suction operation.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the upper and lower molds of a cement mortar molded product manufacturing apparatus according to an embodiment of the present invention upon completion of molding, and FIG. 2 is a cross-sectional view of the molded product manufacturing apparatus according to the present invention. The schematic diagrams, FIGS. 3 to 6, are longitudinal sectional views similar to FIG. 1 of different embodiments from FIG. 1, respectively. 5...Lower mold, 11...Upper mold, 13...Vacuum suction hole, 1
4... Formwork, 15... Water squeezing suction chamber, 15a... Cylinder, 16... Water squeezing outlet, 41... Filtration unit, 4
2...Top lid, 43...Opening, 44...Connecting pipe end, 45
...Auxiliary intake hole, 46...Air supply passage, 47...Air supply connection passage.

Claims (1)

[Claims] 1 A cement mortar with multiple vacuum suction holes provided on the lower surface of the upper mold, these vacuum suction holes connected to a vacuum blower outside the device, and a formwork provided around the upper mold so that it can move up and down with respect to the mold. The molded product manufacturing apparatus is characterized in that a simple connecting passage that opens on the upper surface of the upper mold and communicates with the atmosphere is formed in the wall of the water squeezing suction chamber connected to the vacuum suction hole to serve as an auxiliary air intake hole. Cement mortar molded product manufacturing equipment.