JPH0123286B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method and apparatus for producing cement-based molded products suitable for construction materials, etc., in which reinforcing materials are provided by laying metal ropes when feeding materials into molds. Regarding.

[Conventional technology]

Such a method and apparatus are disclosed in Japanese Patent Application Laid-Open No. 118424/1983. However, this method merely takes measures to avoid exposing the wire to the surface, and is no different from conventional products that have reinforcing materials. Therefore, not only does manufacturing take a long time, but the extent to which the reinforcing material contributes to the strength of the base material is limited.

[Problem to be solved by the invention]

Therefore, the purpose of the present invention is to provide a molding method and manufacturing method that can reduce production costs in order to improve the quality of cement mortar molded products reinforced with inexpensive wire reinforcing materials as a material that requires bending strength, and to automate and speed up manufacturing. We are in the process of providing equipment.

[Means for solving problems]

In order to achieve this objective, the present invention provides that before all or the remainder of the cement mortar material is fed into the mold, reinforcing plates or reinforcing nets are spaced at or above the lower molding surface, and the cement mortar material is It is an object of the present invention to provide a method for manufacturing a reinforced cement mortar molded product, which is characterized in that the product is pressurized while being forcedly squeezed after supplying the cement.

Further, the present invention has a lower mold that is engageable with an upper mold provided at the lower end of the press that moves up and down, and a plurality of suction holes are provided on the molding surface of the upper mold or the lower mold to perform pressure molding. To provide a cement mortar molded product manufacturing device which simultaneously performs water extraction, characterized in that it is equipped with a device for supplying a reinforcing plate or a reinforcing net toward the molding surface of the lower mold. .

[Effect]

Cement products are strong against heavy pressure, but their bending strength is low, so products that use reinforcing materials such as reinforcing bars and wire have traditionally existed. Although it did not prevent flaking or peeling to some extent or prevent it from breaking when it peeled off, its strength was limited, but
- Utilizing the principle of an automatic forced water squeezing type press molding machine as shown in No. By directly contributing to the bending strength of the material, the reinforcing wire gauze incorporated therein can provide an entirely unexpected strength.

As the reinforcing net, synthetic fibers such as nylon, Tetron, polypropylene, Teflon, acrylic, polyvinyl, polyvinylidene, and polyester, fiber nets such as glass fibers and carbon fibers, and stainless steel and other metal nets can be used. You can also use what is called reinforcing steel.

BRIEF DESCRIPTION OF THE DRAWINGS The features of the invention will be explained in more detail below with reference to the accompanying drawings, which illustrate embodiments of the invention.

〔Example〕

1 to 7 are process diagrams showing a first embodiment of the method and apparatus of the present invention.

The lower mold 1 consists of a lower mold main body 3 supported by a support base 2 and a mold frame 4 that slides up and down on its outer periphery. It is supported by a moving table 7, and this table 7 performs horizontal reciprocating motion by a piston-cylinder device 8. Further, a pedestal 9 is arranged and attached to the movable table 7 at a distance from the lower mold so as to be movable up and down with respect to a pedestal support 10, and a receiving plate 11 for receiving the molded product is placed on the pedestal 9. has been done.
The pedestal 9 is fixed to a piston rod 15 of a piston 14 that slides in a cylinder chamber 13 in a pedestal support 10 against a spring 12. The upper mold of the present invention is divided into an upper mold 17 of the main press 16 and an upper mold 19 of the sub-press 18 in this embodiment. Both upper molds 17,1
The spacing between 9 corresponds to the spacing between the lower die main body 3 and the receiving plate 11. The main press 16 includes a piston rod 23 of a piston 22 that slides inside a cylinder chamber 21 of a main cylinder 20 attached to a suitable machine frame (not shown).
It is attached to the bottom end of the. A filter plate assembly 24 consisting of a dehydrating cloth and a wire mesh for supporting the dehydrating cloth, or a draining iron plate is attached to the lower surface of the upper mold 17, and vacuum suction holes 25 are distributed throughout the lower surface, and the filter plate assembly 24 is made of A guide hole 26 provided in the mold is made to communicate with the outside of the upper mold. The guide hole 26 is connected to a water collection pipe (not shown) that is connected to a vacuum blower. Vice press 1
The upper die 19 of 8 is also the upper die 17 of the main press 16.
However, the outer shape of the upper mold is equal to the inner periphery of the mold frame 4 of the lower mold, and is capable of penetrating into the mold frame 4 toward the molding surface of the lower mold. The upper mold 17 of the main press 16 has a lower outer diameter larger than the inner circumference of the mold 4.
It is designed to come into contact with the top edge of the Vice press 1
The upper mold 19 of 8 is also attached to the lower end of a piston rod 30 provided on a piston 29 that slides within a cylinder chamber 28 of a cylinder 27 attached to an appropriate location on the machine frame. A molding material supply device 31 and a reinforcing net supply device 32 are juxtaposed at an intermediate position between both upper molds above the horizontal reciprocating path of the lower mold 1. The molding material supply device 31 can be a screw type pump that supplies water, cement, or other appropriately blended molding material. The reinforcing net supply device 32 includes a roller or a set of rollers 3 for conveying continuous reinforcing nets from a winding drum 33.
4, 35, 36 and a cutting device 37.

The first embodiment of the present invention will be described below according to FIGS. 1 to 7.
The manufacturing process of a reinforced cement mortar molded product according to an example will be explained. In FIG. 1, the piston-cylinder device 8 is in its most retracted position, and the lower die is at the right end. The upper dies 17, 19 of both presses 16, 18 are at the upper end positions. In FIG. 2, the piston/cylinder device 8 is actuated to move the moving table 7 to the left, and when an appropriate point is reached, the screw pump 31 is actuated to supply the molding material 38 to the lower die being moved. After supplying a certain amount as part of the molding amount, the operation of the pump 31 is stopped, and the lower mold 1 is stopped at a matching position below the sub-press 18. At this time, the piston/cylinder device 8
may be the most extended position. At this position, the sub-press 18 is operated to lower the upper mold 19, and as shown in Fig. 3, a part of the molding material is compressed and water-squeezed with a lower compression force than the final molding to form a semi-finished molded product. Get a flat top surface. Next, the moving table 7 is returned to the left side by the operation of the piston cylinder device 8,
Reinforcement net supply device 32 and screw pump 31
The reinforcing net 39 and the remaining molding material 40 are supplied to the upper surface of the material preformed by the sub-press 18, and when the entire surface is supplied, each supply device is stopped (roller (operating the cutting device 37 in synchronization with the stop of the press 1), the table 7 continues to move, and the lower die 1 is stopped at a position aligned with the upper die 17 provided on the main press 16. During the return process of the lower die 1, the upper die 19 provided on the sub-press 18 rises and returns to the upper end position. Next, as shown in FIG. 5, the main press 16 is operated toward the lower mold 1 to which all of the molding material has been supplied, and the upper mold 17 is lowered to perform compression molding operation, and the vacuum blower is activated. A water squeezing operation is performed to forcibly remove moisture from the material and complete the molding. When molding is completed, the vacuum blower does not stop, and when the mold frame 4 is lowered and the upper mold 17 is raised, the molded product 41 is gripped by the upper mold 17 (see Fig. 6), and then moved to the moving table. 7 is subjected to the forward movement, as shown in FIG. 6, the lower mold has already entered the molding process of FIG. 2 for the next molded product, and the upper mold 17 holds the molded product 41 on the pedestal. A relative movement is performed to move to the receiving plate 11 on the seventh
Horizontal movement stops at the position shown in the figure. When the vacuum suction of the upper mold 17 of the main press 16 is released at the position shown in FIG. 7, the molded product 41 is softly attached onto the receiving plate 11. Further, the piston 19 of the sub-press 18 preforms a portion of the material, and the operation is repeated for the next molded product.

8 to 12 show a second embodiment of the present invention.

The lower mold 101 is arranged around a lower mold main body 103 supported on a support stand 102 in a mold frame 104 so as to be vertically movable, and a piston 1 attached to the lower end of the mold frame 104
A cylinder 106 that accommodates 05 is supported by a base 107 together with a support 102, and the lower mold body does not move. On the right side of the lower mold, there is a pedestal 109 fixed to the upper end of a piston rod 115 provided on a piston 114 that moves up and down in a cylinder 113 that is also positioned.
is provided, and a receiving plate 111 is placed thereon.

The molding press 116 is an example of a type in which an upper die 117 moves vertically and horizontally, and a piston slides up and down in a cylinder chamber 121 of a cylinder 120 attached to a machine frame (not shown). 12
A support table 123 is fixed to the lower end of 2, and a piston that slides in a cylinder 125 provided at the right end of the support table 123 is attached to one side of a support block 124 that is guided to slide horizontally on the support table 123. One end of the piston rod 127 of 126 is fixed. The upper mold 117 is placed on the lower surface of the support block 124.
and the position where it aligns with the lower mold 101 and the pedestal 1
09, and by the operation of the piston 122, it can move between a lower position where the molding operation is performed together with the lower mold and an upper position where the conveyance is performed. Upper mold 117 and lower mold 101
On the left side of the upper mold 117, in a position where the materials are aligned, there is a material supply device 128, which consists of two hinged plates that support the material 129 so that it can fall. Also, on the left side of the lower mold 101 is a reinforcing net supply device 130.
A support plate 13 is arranged to support the net 131.
A conveyor plate 135 is provided at the outer end of the piston rod 134 of the piston cylinder device 133 provided at 2, and this can slide on the upper surface of the support plate 132 to horizontally convey the net 131 to the upper surface of the lower mold. A projection 136 is provided on the upper surface of the lower mold body 103 so as to support the net upwardly at a distance from the molding surface. The upper mold 117 has a filter plate assembly 137 attached to the lower end thereof, which is made of a dewatering cloth, a wire mesh for supporting the dehydrating cloth, or a draining iron plate added thereto, and vacuum suction holes 138 are distributed throughout the lower surface, and the filter plate assembly 137 is formed horizontally. The extending guide hole or guide chamber 139 is communicated with the outside of the upper mold 17. The guide hole 139 is connected to a water collection pipe 140 that is connected to a vacuum blower (not shown).

The manufacturing process of a molded article according to a second embodiment of the present invention will be explained below with reference to FIGS. 8 to 12. In FIG. 8, the upper die 117 and the lower die 101 are aligned, and the material supply device 128 is holding the material. first,
A material supply device 128 is placed at a position aligned with the lower die 101.
At the same time, as shown in FIG.
31 is supported by the protrusion 136 at a distance from the upper surface of the lower die main body 103. Next, as shown in FIG. 10, the hinged plate of the material supply device 128 is opened and the material is dropped toward the lower mold 101. The formwork 104 is held at the lowest position, that is, at a position where the upper end does not protrude above the upper surface of the lower mold, until the reinforcing net 131 is supplied, but after the supply is finished, it is moved to the upper position before the material supply starts. , hold it so that it does not come out of the lower molding space. Next, the upper mold 117 is moved to the left by the operation of the piston 126 and brought to a molding position aligned with the lower mold 101. Therefore, the upper mold 117
is lowered as shown in FIG. 11 to perform compression molding, and at the same time, water is forcibly squeezed out to complete the molding. During compression, compression and water squeezing are similarly performed on the underside of the reinforcing net, resulting in a homogeneous molding, and the net is embedded in the molded product. It is also conceivable to use a special protrusion on the lower mold that sinks into the lower mold during molding. (Refer to Japanese Patent Application Laid-Open No. 58-217311). Upper mold 117 after completion of molding
is raised and then moved to the right side to convey the molded product 141 to the pedestal 109 as shown in FIG.
The material 129 is already prepared in the material supply device 128, the reinforcing net 131 is also placed on the lower mold 101, and the next molding operation shown in FIG. 9 has started.

FIG. 13 and FIG. 14 show a third embodiment,
The apparatus is the same as the embodiment shown in FIGS. 8 to 12 except that the protrusion 136 is not provided on the lower mold, and the main parts of the process are as in the first embodiment shown in FIGS. 1 to 7. The material is fed in two stages, but instead of two presses, one press is used to form the material.

FIG. 13 shows a part of the material being supplied to the lower mold, and FIG. 14 shows a part of the material being preformed and then a reinforcing net 131 being supplied to the upper surface thereof.
Further steps and operations for supplying material and performing final molding will be apparent with reference to FIGS. 1-12.

The technical scope of the present invention is not limited to the above three embodiments, and other modifications are possible without departing from the scope of the claims. For example, instead of a reinforcing net, a metal reinforcing plate with protrusions on one side can be supplied to the lower mold first, and then the material can be supplied on top of it for compression molding. It can be manufactured with high production rate. Protrusions can be provided on the metal reinforcing plate by welding protrusions or pins, by stamping circular holes so that the edges protrude, or by punching out chevron-shaped holes with stamping pins to create pointed holes. A reinforcing plate is formed in which the protrusions are made to stand up and a plurality of holes are formed and distributed, forming one side of the molded product, and the protrusions are embedded in the mortar molding material and the material is bitten into the holes and held inseparably.

[Brief explanation of drawings]

1 to 7 are schematic cross-sectional views of one embodiment of the apparatus of the present invention for carrying out the method of the present invention, and are process diagrams of the method of the present invention. FIGS. 8 to 12 are views similar to FIGS. 1 to 7 in the second embodiment of the present invention. FIGS. 13 and 14 are schematic cross-sectional views of a third embodiment of the present invention, showing two states during the process. 1... Lower mold, 3... Lower mold body, 4... Formwork, 7
……Moving table, 9… cradle, 11… cradle,
16... Main press, 17... Upper die, 18... Sub-press, 19... Upper die of sub-press, 31... Material supply device, 32... Reinforcement net supply device, 33...
Winding drum, 34, 35, 36...roller or roller set, 37...cutting device.

Claims (1)

[Claims] 1. Before supplying all or the remainder of the cement mortar material to the mold, reinforcing plates or reinforcing nets are placed at or above the lower molding surface at intervals, and the material is supplied. A method for producing a reinforced cement mortar molded product, which is characterized in that pressure molding is performed while forcibly squeezing water afterwards. 2. Supplying part of the cement mortar material to the lower mold, forming the first layer by water-squeezing compression, then supplying the net to the flattened upper surface of the first layer, and then supplying the remaining material. The manufacturing method according to claim 1, characterized in that the molding is performed by a final water squeezing compression. 3. The manufacturing method according to claim 2, wherein compression of the cement mortar material before and after feeding the net is performed using separate upper molds. 4. The scope of the above claims, characterized in that a supporting projection is provided on the upper surface of the lower mold, a net is supplied and placed on the projection, then a cement mortar material is supplied, and then pressure molding is carried out. The manufacturing method according to item 1. 5. The manufacturing method according to any one of claims 1 to 4, characterized in that the net is supplied from a winding drum to a mold via a conveyance roller. 6. The manufacturing method according to any one of claims 1 to 4, characterized in that the net is fed by pushing the net parallel to the molding surface of the lower die. 7. The manufacturing method according to any one of claims 1 to 4, wherein the net is supplied manually. 8. It has an upper mold provided at the lower end of the press that moves up and down and a lower mold provided so as to be able to engage with it, and has a plurality of suction holes on the molding surface of the upper mold or the lower mold to perform water extraction at the same time as pressure molding. 1. The cement mortar molded product manufacturing apparatus according to the present invention, further comprising a device for supplying a reinforcing plate or a reinforcing net toward the molding surface of the lower mold. 9. Apparatus according to claim 8, characterized in that the net feeding device includes a winding drum, at least one set of rollers and a cutting device. 10. The device according to claim 8, wherein the net feeding device is a pushing member arranged so as to be movable parallel to the lower molding surface. 11. The device according to claim 8, characterized in that a plurality of protrusions are arranged on the molding surface of the lower mold.