JPS6147681B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cement mortar molded product manufacturing apparatus, and more particularly to a molded product manufacturing apparatus that performs water extraction using a vacuum suction device.

[Conventional technology]

The cement mortar molded product manufacturing device uses a high-pressure piston that moves up and down to extract water. By operating a vacuum suction device in synchronization with the high-pressure piston (see Japanese Patent Publication No. 1983-20209), the cement mortar molded product can extract water from raw molded products with low moisture content. It has become possible to produce high-quality molded products or molded products whose surfaces can be painted before curing. The water extraction and suction of this device requires the circulation of air to transport the water, and this is carried out between the upper and lower molds or formwork through the filter plate unit, which is made up of draining iron plates, wire mesh, dewatering cloth, etc. Certain gaps contribute to this. Therefore, when squeezing water from the inner bottom wall of the mold, even if vacuum suction is used, air circulation is difficult and it is not practical. In addition, filtration means such as dewatering cloth cannot be said to be perfect in all cases, and residual water tends to occur in the center of the water squeezing surface.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cement mortar molded product manufacturing apparatus that has an improved vacuum suction device that can completely remove water and is suitable for painting after molding and before curing if necessary.

[Means for solving problems]

In order to achieve this object, the present invention provides a plurality of vacuum suction holes on one molding surface of the upper and lower molds, and at least one air supply port separate from the vacuum suction holes on the molding surface. It is an object of the present invention to provide a cement mortar molded product manufacturing device characterized in that it is designed to facilitate water extraction.

[Effect]

With this configuration, in addition to the air flow coming through the filter plate unit, or exclusively by itself, the air that guides the water to be squeezed can be supplied to the molding surface that is the water squeezing surface. As a result, water extraction and suction can be made more complete, and high-quality molded products that can be painted immediately after molding can be manufactured by high-speed automatic operation.

〔Example〕

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

Fig. 1 shows an embodiment of a cement mortar molded product manufacturing apparatus of the type in which an upper mold is provided at the lower end of a press piston that moves up and down, and a water extraction suction port is provided in this upper mold. A sliding table 3 is fixed to the lower end of a hydraulic piston 2 that moves up and down in a hydraulic piston 1 via a piston rod, an air cylinder 4 is attached to the lower side of the sliding table 3, and the piston slides inside the cylinder 4. and is slidably mounted on the lower side of the sliding table 3. An upper mold 7 is provided on the lower surface of the sliding block 6.
is attached, and a plurality of vacuum suction holes 9 are drilled at regular intervals on the lower surface 8, which is the molding surface. This vacuum suction hole 9 is connected to a vacuum source outside the apparatus, such as a vacuum blower, via a water squeezing suction passage 10 of the upper mold 7. A raw material supply device 11 is provided on the opposite side of the sliding block 6 from the side continuous with the piston rod 5. The sliding block 6 moves horizontally between two positions. In one position (the position shown in FIG. 1), when the upper mold 7 is lowered, the lower mold 12 and the formwork 1
This is the position where a molding space can be formed together with 3. At the other position, the lower surface 8 of the upper mold is vertically aligned with the pedestal 15 which is moved up and down by the cylinder 14, and at this position, the molded product conveyed by the upper mold 7 after molding can be delivered to the pedestal. The mold frame 13 surrounding the lower mold 12 is slid against the lower mold 12 by the cylinder 20, and after molding, it is lowered and completely separated from the side of the molded product, and the lower mold 12 is removed by the suction force of the upper mold 7. Helps the molded product release from the mold. 16 is a molding material, and 19 is a molded product.

Reference numeral 17 denotes an air supply pipe which communicates an air supply port, which is a novel element of the present invention, with an air supply pump (not shown). This will be explained below with reference to FIGS. 2 and 3 showing enlarged views of the upper mold or the upper and lower molds of the present invention. 7 has a plurality of vacuum suction holes 9 bored in its lower surface, the upper end of which communicates with a water squeezing suction passage 21, and this suction passage 10.
is connected to a water collection pipe 22 that communicates with a vacuum source.
The suction passage 10 is a group of a plurality of pipes arranged horizontally in parallel, and the end opposite to the water collection pipe 21 is stopped by a stop plate 22. The lower surface of the upper mold 7 is covered with wire mesh, dehydration cloth,
A filter plate unit 23, which is a combination of draining iron plates and the like, is fixed with a mounting stopper 24. The water squeezing suction passage 21 is connected to the connection hole 2 in the vicinity of the stop plate 22.
5 and communicates with the atmospheric suction pipe 26. As shown in the figure, the atmospheric suction pipe 26 is preferably provided in a plane above the water squeezing suction passage 10 of the upper die 7 in a direction perpendicular thereto. A water supply pipe 27 is inserted concentrically onto the axis of the atmospheric suction pipe 26. The inside of the water supply pipe 27 communicates with the atmospheric suction pipe 26 through a hole provided in the pipe wall, and the water supply pipe 27 is connected by suction force from the water collection pipe 21 side.
The water mixes with the air in the atmospheric suction pipe 26 to constantly clean the water squeezing suction passage 21, and merges with the squeezing water from the vacuum suction hole 9 to be sucked.

According to the present invention, an air supply port is provided separately from the vacuum suction hole 9 on the water squeezing surface 8 which is the lower surface of the upper mold and is the molding surface in the mold in which one of the vacuum suction holes is provided, that is, in this embodiment, the lower surface of the upper mold. 18 is opened, and this air supply port 18 is connected to an air supply pump (not shown) via an air supply pipe 17. Various choices can be made regarding the location and number of air supply ports 18 on the lower surface of the upper mold 7.
In the embodiment shown in FIGS. 1 to 3, only one opening is provided in the center of the water squeezing surface. Filter plate unit 2
Since the air supply from No. 3 is carried out from the outer periphery of the water squeezing surface, the central portion is the furthest away, so it is difficult for the conveying air to act on this portion. Therefore, water extraction in this area tends to be insufficient, and opening the air supply port 18 in this area is most effective in this embodiment. However, it is not necessary to limit the number to one, and for example, four air supply ports may be provided in the center so as to form the vertices of a square. By spreading the gentle air from the air supply port 18 to the water squeezing surface, the suction effect is enhanced, water is squeezed evenly, and the finished surface with less moisture becomes the molded product 1.
Formed at 9.

The embodiment shown in FIG. 4 is a molded product manufacturing apparatus in which the upper mold does not move up and down, but the lower mold moves up and down by a press to perform molding. A support stand is provided on the upper surface of a piston rod fixed to the upper surface of a piston 102 that moves up and down in a cylinder 101 provided on the base of the apparatus, and a lower die (mold stand) 112 is fixedly arranged on this support stand. A sliding block 106 is slidably supported above the lower die 112 on the lower surface of an upper mounting base 103 provided on the machine frame (not shown), and slides inside an air cylinder 104 mounted on the upper mounting base 103. The end of the piston rod 105 that connects to the moving piston is fixed. An upper mold 107 is fixed to the lower surface of the sliding block 106, and a vacuum suction hole 109 is bored in the lower surface 108, which is the molding surface.
09 is connected to a water squeezing suction passage 110 provided in the upper mold 107. A formwork 11 is attached to the outer periphery of the lower part of the upper mold 107.
3 is provided so as to be movable up and down by a cylinder 114. 111 is a raw material supply device, and 115 is a molding material. The molding material 115 is applied to the upper mold 107 after molding.
, and is delivered to the iron receiving plate 116 on the receiving stand 122 , and then transferred from the delivery position to the belt conveyor 121 by the operation of the composite cylinder 114 . 117
is an air supply pipe according to the present invention provided in the upper die 107.

In this embodiment, since the water squeezing surface 108 is surrounded by the formwork 113 during molding, there is no possibility of air being supplied from the gap between the upper and lower molds, and the air supply pipe 11
It can only be put to practical use by the action of 7. Therefore, the arrangement of the air supply pipes 117 should be plural in this embodiment, and the air supply pipes 117 should be arranged in a plurality of positions, for example, at positions that are drawn inward from the outer periphery of the molding surface and equidistant from the outer periphery, for example, forming a square shape. It is a good idea to open the air supply port. It is also obvious that one or more holes may be provided at or near the center.

The air supply pipe 117 may be opened at the upper surface of the molding surface shown in the figure, or at the side surface or the boundary between the side surface and the upper surface, that is, the outer periphery of the upper surface. The air supply pipe 117 can be formed by providing a groove on one or both of the inner peripheral surfaces of the air supply pipe 117.

In the above two types of embodiments, the upper mold is provided with a vacuum suction hole, but in the case of an apparatus in which a vacuum suction hole is provided in the lower mold, an air supply port is similarly provided in the lower mold. It is clear that the same effect can be achieved and it falls within the technical scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a sectional elevational view of the first embodiment of the cement mortar molded product manufacturing apparatus of the present invention, and FIG. 2 is an enlarged view of the upper and lower mold parts of the apparatus shown in FIG. 1.
Figure 3 is a cross-sectional view along line - of Figure 2.
FIG. FIG. 4 is a sectional elevational view of a second embodiment of the molded article manufacturing apparatus of the present invention. 7,107... Upper mold, 9,109... Vacuum suction hole, 10,110... Water squeezing suction passage, 17,11
7...Air supply pipe, 18,118...Air supply port.

Claims (1)

[Claims] 1. A plurality of vacuum suction holes are provided on one molding surface of the upper and lower molds, and at least one air supply port separate from the vacuum suction hole is opened on the molding surface to promote water extraction. A cement mortar molded product manufacturing device characterized by: