JP2000313005A - Apparatus for molding inorganic hydraulic molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent finishing accuracy of the surface from being spoiled caused by jetting of water content when a molded article is released and to prevent water content from entering into a releasing gas jetting hole by performing releasing the molded article consisting of an inorg. hydraulic material such as cement mortar and clay from the molding face of a mold by jetting a releasing gas from a releasing gas jetting hole provided on the molding face in relation to an apparatus for an inorg. hydraulic molded article. SOLUTION: Through-hole parts 4 for performing water squeezing and air suction of a molded article are provided on the molding face S1 of one of molds consisting of a top mold 1 and a bottom mold 2 and a releasing gas jetting hole 5 is provided on the molding face S2 of another mold and a rod valve 7 is inserted and arranged movably up and down in a gas feeding passage 6 to form a small diameter part 8a opening between a valve seat 6a through a gap K and a large diameter part 8b opening when the molded article is released and a gas introducing hole 13 and a water drainage hole 12 are respectively provided on the upstream side and the downstream side of the gas feeding passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for molding an inorganic hydraulic molded article, and more particularly to a molding apparatus made of an inorganic hydraulic material such as cement mortar, clay, ceramic, gypsum, etc. At the tip of the mold to drain water that enters the gas supply passage from the molded product, and when releasing the molded product, release gas is injected from the release gas injection holes to release the molded product from the molding surface. The mold was released efficiently.

[0002]

2. Description of the Related Art Conventionally, an apparatus for molding an inorganic hydraulic molded product, for example, a molded product of cement mortar has been disclosed in Japanese Patent Publication No. 5-8864.
There is an invention described in Japanese Patent Publication No. 2 (JP-A) No. 2 (1994). That is, as shown in FIG. 5, one of the molds composed of the upper mold a and the lower mold b, that is, a plurality of molds provided on the molding surface c of the upper mold a to perform water squeezing and suction when the molded product N is compressed. A through hole d, a plurality of release gas injection holes f opening to a molding surface e of the lower mold b as the other mold, and a molding surface e of the lower mold b through the release gas injection holes f. And a gas supply passage g provided in the lower mold b as the other mold, and the molding material N ′ is connected to the molding surface e of the mold.
From the point of supply to the mold release start point after the completion of molding, between the closed position where the mold release gas injection hole f is flush with the molding surface e and the open position where the molding surface e communicates with the gas supply passage g. A rod-shaped valve h movably provided in the gas supply passage g between two positions. Then, a molding material N ′ such as cement mortar made of an inorganic hydraulic material is charged into the molding surface of the upper mold a and the lower mold b as a mold, and at least one of the upper mold a and the lower mold b is the other. Then, the molded product N is pressed and compressed by being moved in a direction opposite to the above, and is squeezed and absorbed through a plurality of through-holes d provided in a molding surface c of an upper die a as a mold to form a molded product N. Next, the upper mold a as one mold is moved in a direction opposite to the lower mold b as the other mold, and a plurality of separation molds provided on the molding surface e of the lower mold b as one mold are moved. The molding gas N is released from the mold gas injection holes f to release the molded product N. Then, the molding surface c of the upper mold a as the other mold is vacuum-sucked through the plurality of through-holes d to adsorb the molded product N to the molding surface c of one mold.

[0003]

FIG. 5 shows a conventional apparatus for molding a molded article of cement mortar, which comprises an upper mold a and a lower mold b.
During the molding of the molded article N to be compression-molded by the two molds, the release gas injection holes f provided on the molding surface e of the lower mold b
Is closed by a rod-shaped valve h to perform molding, and when the molded product N is released from the mold, the closure by the rod-shaped valve h is released and the release gas G is injected from the release gas injection hole f. , Water generated from the molded product N enters the gas supply passage g from the release gas injection hole f. As described above, the water that has entered the gas supply passage g is accumulated in the gas supply passage g each time molding of the molded article N is performed, since the drain hole communicating with the outside is not provided. Therefore, the moisture accumulated in the gas supply passage g
After the molding of the molded article N, the release gas G is injected from the release gas injection hole f together with the injection of the release gas G to the surface of the molded article N vigorously again. As a result, the molded article N cannot be molded. The present invention solves the above-mentioned conventional inconvenience, and reliably drains water that enters the gas supply passage from the gap between the release gas injection hole and the tip of the rod-shaped valve during molding of a molded product to the outside. An object of the present invention is to provide a molding apparatus for an inorganic hydraulic molded product that prevents accumulation in the interior and forms a highly accurate molded product without impairing the finishing accuracy with respect to the surface of the molded product.

[0004]

Means for Solving the Problems The present invention has been made in view of the above-mentioned problems, and a first aspect of the present invention is to squeeze water when compressing a molded product on one molding surface of a mold composed of an upper mold and a lower mold. A plurality of through-holes provided for performing suction, a plurality of release gas injection holes which are opened on the molding surface of the other mold, and a communication with the other molding surface via the release gas injection holes. And a gas supply passage provided in the other mold, and closing the mold release gas injection hole from the time when the molding material is supplied to the molding surface of the mold to the time when mold release is started after the molding is completed, so as to be flush with the molding surface. And a rod-shaped valve movably provided in the gas supply passage between the closed position and the open position communicating the gas supply passage. Inorganic hydraulicity to release mold products by injecting mold gas from the release gas injection holes In the apparatus for forming a molded article, the rod-shaped valve is controlled to be vertically movable by a driving source, and the rod-shaped valve has a gap between a valve seat provided on an inner periphery below a gas supply passage when the molded article is raised. A small-diameter portion that is opened to be communicable with the large-diameter portion above the small-diameter portion, which is disposed on the valve seat at the time of descent for releasing the molded product and is closed so that a release gas can be ejected. And a means for providing a gas introduction hole on the upstream side and a drainage hole on the downstream side through the valve seat in the gas supply passage.

According to a second aspect of the present invention, in the first aspect, the through hole is provided on a molding surface of an upper mold, and the release gas injection hole is provided on a molding surface of a lower mold. That means was adopted.

A third aspect of the present invention is characterized in that, in the first aspect, the through hole is provided on a molding surface of a lower mold, and the release gas injection hole is provided on a molding surface of an upper mold. That means was adopted.

According to a fourth aspect of the present invention, in the first aspect, the driving source is a cylinder which is moved up and down between a drain position and a water stop position through a hydraulic circuit to be switched. Adopted.

According to a fifth aspect of the present invention, in the first aspect, the gas supply passage is formed to have a minimum cross-section near the release gas injection hole so that the tip of the rod-shaped valve can be inserted thereinto. A means is adopted in which the cross section is formed to have a maximum diameter near the installation of the hole or the drain hole.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 4 show one embodiment of the present invention. 1 is an upper mold as a mold, 2 is an upper mold 1
Is a lower mold that is disposed below and opposite to. The upper die 1 and the lower die 2 as these dies move up and down in the direction facing each other or away from each other by driving a cylinder (not shown) with respect to the other, or the upper die 1 and the lower die 2 moves up and down in a direction facing each other or in a direction away from each other to form a molded product N. Reference numeral 3 denotes a mold provided on the outer periphery of the lower mold 2 as a lower mold, and the mold 3 moves up and down by driving a cylinder (not shown).

[0010] Then, one of the upper mold 1 and lower mold 2, a plurality of through provided for performing dewatering and intake during molding of the molded article N to the molding surface S ₁ of the upper mold 1 in the embodiment shown The hole 4, a plurality of release gas injection holes 5 opening on the molding surface S ₂ of the lower mold 2 as the other mold, and the communication with the molding surface S ₂ via the release gas injection holes 5. And the gas supply passage 6 provided in the lower mold 2 as the other mold, and the mold release from the time when the molding material N 'is supplied to the molding surface S2 of the lower mold ₂ to the time when the mold release is started after the molding is completed. The gas injection hole 5 is closed and the molding surface S ₂
A movable position is provided in the gas supply passage 6 between a closed position where the molding surface S ₂ and the open position communicating the gas supply passage 6 by being moved from the release gas injection hole 5 and the release position. The mold release gas G is injected from the mold release gas injection hole 5 after the molding of the molded article N, and the molded article N is released. Also the through hole 4 on the forming surface S ₁ of the upper mold 1 in upper and releasing the gas injection hole 5 of the lower mold 2 of the lower forming surface that is provided in S ₂ is conventional as shown in FIG. 5 It is the same as the molding device for molded products. Examples of the molding material N ′ for molding the molded product N include cement mortar,
Hydraulic inorganic materials such as clay, ceramic, and gypsum are used.

In the present embodiment, the rod-shaped valve 7 is
It is disposed in the gas supply passage 6 and is controlled so as to move up and down to a drain position and a water stop position by driving a cylinder 11 as a drive source through a hydraulic circuit 10. 1
1a is a piston portion of the cylinder 11, and the rod-shaped valve 7 is attached to the tip of the piston portion 11a. The rod-shaped valve 7 communicates with a substantially annular valve seat 6a provided on the lower inner periphery of the gas supply passage 6 via a gap K when the molded product N is raised (see FIGS. 1 and 2). A small-diameter portion 8a that is opened as much as possible, and a gas is released above the small-diameter portion 8a by being inserted into the valve seat 6a when the molded product N is released (see FIG. 3). Large-diameter outer peripheral portion 8b capable of ejecting G
Are formed on the lower valve body 8.

[0012] Then, the rod-shaped valve 7 tip 7a as the time rise to mold a molded article N shown in FIG. 2 is inserted at a height that matches the molding surface S ₂ to release the gas injection hole 5, moreover By opening the valve via a gap K formed between the gas supply passage 6 and a substantially annular valve seat 6a provided on the lower inner periphery of the gas supply passage 6, the lower side of the gas supply passage 6 on the downstream side via the valve seat 6a. The water of the molded article N which enters the gas supply passage 6 from a slight gap formed between the tip end portion 7a of the rod-shaped valve 7 and the release gas injection hole 5 through the drain hole 12 provided to the outside of the mold. I do. Further, as shown in FIG. 3, when the molded product N is released from the mold, the large-diameter outer peripheral portion 8b of the rod-shaped valve 7 is inserted into the valve seat 6a to close the gas supply passage 6, so that the gas supply passage 6 is closed. The mold release gas G introduced into the gas supply passage 6 through the gas introduction hole 13 provided on the upstream side is injected from the release gas injection hole 5 to the lower surface of the molded product N, thereby forming the molding surface S of the lower mold 2. _The mold N is released from step ₂ .

The gas supply passage 6 has a cross section in the vicinity of the gas injection hole 5 having a minimum diameter φ ₁ in which the tip 7 a of the rod-shaped valve 7 can be inserted. Since the cross section is formed to have a maximum diameter of φ ₂ near the installation, the cross-sectional area of the release gas injection hole 5 should be reduced when forming the molded product N, and the rod should be securely closed at the tip 7 a of the rod-shaped valve 7. As a result, the moisture from the molded product N is prevented from entering the gas supply passage 6, and the moisture that has inadvertently entered the gas supply passage 6 is efficiently discharged to the outside. The mold release gas G is efficiently ejected from the mold gas ejection holes 5 to release the molded article N from the mold.

[0014] 14 is a filter plate device attached to the molding surface S ₁ of the upper mold 1 as the die, the filtration plate 14 is included in molding material N 'at the time of molding the molded article N A dewatering cloth 15 and a wire mesh 16 so as to suck and squeeze water,
It is formed by overlapping the draining iron plate 17.

One embodiment of the present invention has the above configuration.
In order to form the molded product N, a cylinder (not shown) is driven with respect to one of the lower molds 2 of the mold to raise the mold frame 3,
A desired amount of, for example, cement mortar made of an inorganic hydraulic material as a molding material is put into a molding space surrounded by the lower mold 2 and the mold 3 (see FIG. 1). Thereafter, another cylinder (not shown) is driven to drive the upper mold 1 as a mold.
Or lowering or raising one of the lower molds 2 in the direction facing the other, or the upper mold 1 and the lower mold 2
Are pressed or compressed by the upper mold 1 and the lower mold 2 by raising or lowering both in the opposite direction. Then, the upper die 1 of the forming surface S more holes 4 vacuum suction to the molded product by performing dewatering and suction by a vacuum pump not shown in FIG moisture arising from the molding material N 'through which is provided in ₁ N
Is similar to a conventional molding apparatus. At this time, the lower mold 2 one mold as shown in FIG. 2, the gas supply passage 6 which communicates is provided on the molding surface S _2,
Attached to the piston portion 11a by the tip portion 7a of the rod-shaped valve 7 which is inserted distribution in the gas supply passage 6 the piston portion 11a of the cylinder 11 as a drive source to a height that matches the molding surface S ₂ are extended The tip 7a of the rod-shaped valve 7 closes the release gas injection hole 5 to prevent water generated from the molding material N 'from entering the gas supply passage 6.

Moreover, a small diameter portion 8a formed on the valve body 8 of the rod-shaped valve 7 attached to the tip of the piston portion 11a of the cylinder 11 has a gap K formed between the small diameter portion 8a and the substantially annular valve seat 6a. Since the gas supply passage 8 is opened, the water that has inadvertently entered the gas supply passage 6 is drained from the drain hole 12 to the outside of the mold. At this time, the water drained from the drain hole 12 may naturally flow out, or may be sucked in vacuum using a vacuum pump (not shown). For this reason, the moisture generated from the molding material N ′ entering the gas supply passage 6 is applied to the surface of the molded product N which has been press-formed at an angle by the pressing force of the release gas G injected from the release gas injection hole 5. The inconvenience of impinging vigorously and impairing the surface finishing accuracy can be solved.

In this embodiment, when the molded product N is released from the mold, as shown in FIG. 3, the upper mold 1 of the mold is slightly raised by several mm with respect to the lower mold 2 of the other mold. Then, when the cylinder 11 is driven and the piston portion 11a is reduced,
Diameter of the valve body 8 with the distal end portion 7a of the piston portion 11a rodlike valve 7 attached to the release the releasing gas injection holes 5 provided on the molding surface S ₂ by removing inserted from releasing the gas injection hole 5 The outer peripheral portion 8b is inserted into the valve seat 6a having a substantially annular shape in a plane to close the valve, and blocks the communication with the drain hole 12 provided on the downstream side of the gas supply passage 6 via the valve seat 6a. For this reason, the tip 7a of the rod-shaped valve 7 descends and the lower mold 2
Since opening the blockage of the gas injection hole 5 communicating with the molding surface S _2, by releasing the gas G introduced from the gas introduction hole 13 into the gas supply passage 6 to be injected from the release gas injection holes 5 The molded product N is pushed up, and the release of the molded product N is performed quickly and efficiently. In the illustrated embodiment, one rod-shaped valve 7 is inserted into the gas supply passage 6 and the release gas injection hole 5 is provided.
Although one is provided in the lower mold 2, the number of installations can be freely increased or decreased according to the size of the lower area of the molded product N, the weight of the molded product N, the water squeezing state, and the like.

[0018] Then, upper mold 1 is molded product forming surface S ₁ N
After moving to the desired height after being sucked, the molded product N is moved in the horizontal direction, the molded product N is placed on a receiving table (not shown), and the molded product N is delivered. Thereafter, the upper mold 1 is horizontally moved to the previous position to a position where the upper mold 1 is aligned with the lower mold 2, and one cycle for molding the molded product N is completed.

In the illustrated embodiment, a plurality of through holes 4 are provided in the upper mold 1 as one of the molds to suction and squeeze the molded product N, and the gas supply passage 6 is formed in the lower mold 2. One rod valve 7 inserted in the gas supply passage 6 is shown, and the mold release gas G is blown out to the molded product N to perform the mold release quickly and reliably. The gas supply passage 6 and the rod-shaped valve 7 are not limited to the above, and a plurality of the gas supply passages 6 and the rod-shaped valves 7 are provided depending on the width of the lower area of the molded product N, the weight of the molded product N, the water squeezing state, etc. In addition, the mold release can be performed efficiently, and the number of installations is not limited to the above description.

[0020] In the above embodiment shown, a plurality of through holes 4 in the forming surface S ₁ of one of the upper mold 1 in the mold, a rod-shaped valve 7 the forming surface S ₂ of the other of the lower mold 2 is provided with the release gas injection hole 5 for injecting release gas G with distribution interpolation, the hole portion 4 is provided on the molding surface S ₂ of the lower die 2 in the opposite, the molding surface of upper mold 1 S _A release gas injection hole 5 can be provided in ₂ .

[0021]

As described above, according to the first aspect of the present invention, a plurality of molds provided for performing water squeezing and suction when compressing a molded product on one molding surface of a mold composed of an upper mold and a lower mold. A through-hole portion, a release gas injection hole that opens to the molding surface of the other mold, and a gas provided in the other mold in communication with the other molding surface via the release gas injection hole. A supply passage, a closing position where the release gas injection hole is closed to be flush with the molding surface from the time when the molding material is supplied to the molding surface of the mold to the time when the mold is released after the completion of molding, and a molding surface and gas supply. A rod-shaped valve movably provided in the gas supply passage between the open position communicating the passage and the open position, and a release gas is injected from the release gas injection hole after the molding of the molded product is completed. In the molding apparatus of an inorganic hydraulic molded product for releasing the molded product, the rod-shaped valve is driven. The rod-shaped valve is controlled to be able to move up and down, and the small-diameter portion is opened and communicable with a valve seat provided on the lower inner periphery of the gas supply passage at the time of ascending forming a molded product. An upper portion of the small diameter portion is provided with a large diameter outer peripheral portion which is disposed on the valve seat at the time of descending to release the molded product and is closed so that the release gas can be ejected, and the gas supply passage is formed in the gas supply passage. Since the gas introduction hole is provided on the upstream side and the drainage hole is provided on the downstream side via the valve seat, the release gas is injected from the release gas injection hole to release the molded product from the molding surface of the mold. It can be done efficiently. Moreover, during molding of the molded product, water entering the gas supply passage from the gap between the plurality of release gas injection holes and the tip of the rod-shaped valve is reliably drained to the outside to prevent accumulation inside. In addition, a highly accurate inorganic hydraulic molded product can be molded without impairing the finishing accuracy with respect to the surface of the molded product.

According to the fourth aspect of the present invention, since the drive source is a cylinder which is vertically moved and switched between a drain position and a water stop position through a hydraulic circuit, the rod-shaped valve drives the cylinder through a hydraulic circuit. As a result, the switching operation is performed with good responsiveness.

According to a fifth aspect of the present invention, the gas supply passage has a minimum diameter in the vicinity of the gas injection hole so that the distal end of the rod-shaped valve can be inserted into the gas supply passage. Since the cross section is formed at the maximum diameter near the installation, the tip of the rod-shaped valve coincides with the molding surface and closes the release gas injection hole during molding of the molded product, contributing to molding,
Moisture generated from the molded product is prevented from entering the gas supply passage, and is jetted to the molded product at the time of injection of the release gas, thereby contributing to the release of the molded product. The assembly to the valve is easy and the device itself is compact.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an apparatus for molding an inorganic hydraulic molded article according to the present invention, in which a molding material is charged into a molding surface of a mold.

FIG. 2 is a cross-sectional view of the molded product during molding.

FIG. 3 is a sectional view of the molded product when it is released from the mold.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a cross-sectional view showing an example of a conventional apparatus for forming an inorganic hydraulic molded product.

[Explanation of symbols]

1 the upper mold 2 lower mold 3 Formwork 4 hole portion 5 releasing the gas injection hole 6 gas supply passage 7 bar-shaped valve 7a tip 8 valve 8a small diameter portion 8b larger-diameter outer peripheral portion 11 cylinder N molded article S ₁ forming surface S ₂ molding surface

Claims (5)

[Claims] 1. A plurality of through holes provided on one molding surface of a mold comprising an upper mold and a lower mold for performing water squeezing and suction during compression of a molded product, and a molding surface of the other mold. A releasing gas injection hole that opens, a gas supply passage provided in the other mold in communication with the other molding surface through the releasing gas injection hole, and a molding material on the molding surface of the mold. From the point of supply to the point of start of mold release after the molding is completed, the mold release gas injection hole is closed and the gas is passed between two positions: a closed position flush with the molding surface and an open position communicating the gas supply passage with the molding surface. A rod-shaped valve movably provided in the supply passage and provided in the gas supply passage, and after the molding of the molded product is completed, a release gas is injected from the release gas injection hole to release the molded product. In the molding apparatus for molded articles, the rod-shaped valve is controlled to be vertically movable by a driving source. The rod-shaped valve is a small-diameter portion that opens so as to be able to communicate with a valve seat provided on the lower inner periphery of the gas supply passage through a gap when the molded product is raised, and a molded product is provided above the small-diameter portion. A large-diameter outer peripheral portion which is inserted into the valve seat at the time of releasing to release and closes to allow the release gas to be ejected, and the gas supply passage is provided on the upstream side via the valve seat. A molding apparatus for an inorganic hydraulic molded product, wherein a gas introduction hole and a drainage hole are provided on a downstream side. 2. The method according to claim 1, wherein the through hole is provided on a molding surface of an upper mold.
The molding apparatus for an inorganic hydraulic molded product according to claim 1, wherein the release gas injection hole is provided on a molding surface of a lower mold. 3. The method according to claim 1, wherein the through hole is provided on a molding surface of a lower mold.
The molding apparatus for an inorganic hydraulic molded product according to claim 1, wherein the release gas injection hole is provided on a molding surface of an upper mold. 4. The molding apparatus according to claim 1, wherein the drive source is a cylinder that is vertically moved to a drain position and a water stop position through a hydraulic circuit and is operated to be switched. . 5. A cross section of the gas supply passage is formed to have a minimum diameter near the release gas injection hole so that the tip of the rod-shaped valve can be inserted, and a cross section near the installation of the gas introduction hole or the drain hole. The molding apparatus for an inorganic hydraulic molded article according to claim 1, wherein the molding apparatus has a maximum diameter.