JPH0624723B2 - Raw material metering and supply device for cement mortar molded products - Google Patents

Description

TECHNICAL FIELD The present invention relates to a raw material metering / supplying device for molded articles such as concrete, mortar and other roof tiles, floorboards and other building materials.

(Prior Art) In such a device, a raw material container having a raw material supply hole, a bottom plate having a drop hole to a molding device which is located below the raw material container and is horizontally separated from the raw material supply hole, A device on a bottom plate including a metering / feeding device having a metering section reciprocating between the raw material supply hole and the dropping hole is known from Japanese Utility Model Publication No. 42-8127. The apparatus shown in this document has a raw material supply hole 2 in a raw material container 1 and a bottom plate 3 at a constant interval below the raw material supply hole, as schematically shown in FIGS. 5a and 5b. Is provided and is fixed so as not to move relative to the container 1. The bottom plate 3 is provided with a drop hole 4 horizontally separated from the raw material supply hole 2, and a metering / feeding device which can be reciprocated by a hydraulic cylinder 5 is provided between the plane of the supply hole 2 and the plane of the drop hole 4. The metering / feeding device 6 can be reciprocated by its reciprocating motion between a position aligned with the raw material supply hole 2 (FIG. 5a) and a position aligned with the drop hole 4 (FIG. 5b). Has a weighing compartment that has become. The weighing section 7
Has only a peripheral wall and is open at the top and bottom, and when it is in a position aligned with the raw material supply hole 2 of the raw material container 1 as shown in FIG. 5b in which the metering and feeding device 6 is moved to the right by the operation of the hydraulic cylinder 5 while the closed raw material is in the compartment and the metering compartment 7 is aligned with the drop hole 4 of the bottom plate 3. When the position shown in the figure is reached, the weighed raw material falls into the drop hole 4
It is further dropped and supplied into the molding die. In this state, the raw material supply hole 2 is closed by the upper surface of the metering / feeding device 6. Reference numeral 8 is a rotary shaft 10 of a rotary blade 9 that performs a cutting operation.

Due to the structure as described above, the structure is simple, but the weighing is widely used quickly and reliably.

However, in this device, when the weighing section is moved to the drop hole and the weighing and feeding operations are performed, the weighing section 7 and the inside of the container 1 communicate with each other through the raw material supply hole 2 at the start of the operation. There is a tendency that the raw material in the compartment flows back into the container and the weighed raw material is not completely supplied to the drop hole, so that the weighing is not accurately performed. Especially the viscosity of the raw material is relatively high,
Further, in the case of fibrous material, for example, acrylic fiber, glass fiber, carbon fiber, metal fiber or the like or a mixture of these, when the raw material is introduced into the measuring section and the material is scraped and quantified, the fiber mixed in from the scraped end surface Pulled,
Voids were generated in the internal volume, which resulted in a measurement error, making it difficult to accurately measure the volume. Further, even if the raw material has a low viscosity, the backflow of the raw material due to the pressure during the movement of the metering section cannot be avoided, the accuracy thereof is limited, and the moving speed of the metering section is also limited.

(Problems to be solved by the invention) Therefore, the present invention is a raw material measuring and supplying device for a cement mortar molded product, which has a simple structure and is capable of relatively reliable measurement, regardless of the viscosity of the raw material, and An object of the present invention is to provide a metering / feeding device that can quickly measure and reliably deliver a fixed amount of a raw material, including a material mixed with fibers, without causing a measurement error of the raw material.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a raw material container having a raw material supply hole on the bottom surface, and a molding apparatus which is below the raw material container and is horizontally separated from the raw material supply hole. And a raw material metering device such as a cement mortar molded article having a bottom plate having a drop hole and a metering / feeding device on the bottom plate that reciprocates between the raw material supply hole and the drop hole. As a supply device, a rotary blade that slides on the bottom surface of the raw material container and rotatably moves the raw material supply hole is rotatably provided in the raw material container, and shuts off the communication between the raw material supply hole and the weighing section. An apparatus is provided below the raw material supply hole, and a member having a flat surface for slidably supporting the blocking plate is movably connected to the drive unit together with the bottom plate, and the bottom plate opens the bottom surface of the weighing section. Sometimes the above raw material supply hole is connected It is an object of the present invention to provide the above-mentioned raw material metering / supplying device, characterized in that the upper part of a possible metering section is communicated with the atmosphere.

Further, the above-mentioned problem is that the measuring section is fixed to a machine frame that supports a raw material container, the bottom plate moves to move to open and close the bottom surface of the measuring section, and the raw material supply hole and the measuring are provided above the measuring section. It is also solved by providing the above-mentioned raw material measuring and supplying device, which is provided with a blocking plate capable of blocking communication with the compartment.

(Effect) The raw material metering / feeding device for cement mortar molded products of the present invention having the above-mentioned configuration uses the blocking plate above the raw material that is fed from the feed holes of the raw material container and occupies the entire weighing section. It is closed to form a completely closed compartment, and the raw material is accurately weighed as it moves through the weighing compartment and falls. This tends to cause the material to escape above the feed passage due to its shearing action between the upper front edge of the metering compartment and the edge of the feed passage in contact with that upper edge, especially this tendency in the case of high viscosity or fiber mixed raw materials. It is promoted, the raw material is pulled upward together with the fiber, and voids are generated in the raw material in the weighing section,
Although this caused a measurement error, the barrier plate in the apparatus of the present invention forms an empty space whose upper surface is closed on the barrier plate due to the upper part of the plane where shearing action occurs during the metering operation. This is because there is no escape and there is no room for measurement error. It has been found that even with low viscosities, precision can be increased to meet stringent requirements.

(Embodiment) The above and other features of the present invention will be described in more detail with reference to the accompanying drawings showing one embodiment of the present invention.

1 and 2 and FIGS. 3a to 3c show a first embodiment of the present invention, which corresponds to the members 1 to 9 shown in the conventional example of FIGS. 5a and 5b. Are indicated by the same numbers. Raw material supply hole 2 at one location on the bottom wall of circular container 1
However, in view of viscosity, a strip-shaped opening is formed in accordance with the mold forming space. There is a bottom plate 3 having a drop hole 4 provided at a certain distance in the horizontal direction from the supply hole 2. The drop hole 4 may be provided directly above the molding die, or another supply unit may be provided between the dropping hole 4 and the molding die. On the bottom plate 3, a metering and feeding device 6 slidably provided by a first hydraulic cylinder or an air cylinder 5 has a measuring section 7 having a cross section equal to the raw material supply hole 2 at its tip.
Is provided at a position where the piston rod 11 of the cylinder 5 is deeply drawn into the cylinder and is aligned with the raw material supply hole 2 (see FIGS. 2, 3a, and 3c). In the fully extended position (see FIG. 3b) the weighing compartment 7 is aligned with the drop hole 4 in the bottom plate 3.
Obviously, the cylinder 5 can also be a mechanical drive with an electric motor.

On the upper surface of the weighing and feeding device 6, there is a blocking plate support 13 that guides the blocking plate 12, and the support 13 includes an upper plate 14 and a lower plate 15.
There is a spacer 16 between the upper and lower plates 14, and the whole is supported by the machine frame supporting the bottom plate 3 and the raw material container 1.
15 and the spacer 16 include the measuring section 7 and the container 1 described above.
Is provided with an opening or a portion of the opening which is aligned with the raw material supply hole 2 in the vertical direction, and the spacer 16 is further provided with a space adjacent to the opening and for guiding the blocking plate 12 integrally with the opening. The spacer 16 is sandwiched between the upper and lower plates 14 and 15 so as to surround this space. Although it is possible to provide the lower surface of the raw material container 1, and hence the upper surface of the support 13 that supports the blocking plate 12 with respect to the raw material supply hole 2 thereof, directly, but as shown in the figure, the raw material supply hole 2 of the container 1 and the blocking plate. Between the corresponding openings of the support 13 there may be a supply connection 17 arranged such that the openings are aligned. If this space has at least the same volume as the volume of the measuring section 7 below it, the space becomes a reserve section for the measuring section 7, and it is possible to reasonably increase the speed of metering and supply. The shut-off plate 12 is moved by the second hydraulic cylinder (or air cylinder) 18 to the measuring section 7
Is aligned with the raw material supply hole 2 of the container 1 in the vertical direction, it is reciprocally movable between a retracted position in which they communicate with each other and an advanced position in which they are completely blocked. Two rotary blades 9 are seen symmetrically in the container 1, which are rotatably connected to the rotary shaft 8 by a connecting rod 19 and are slidably provided on the bottom surface 1a of the container 1. The raw material supply hole 2 is slidably rotated to perform a scraping operation, whereby the raw material is dropped from the raw material supply hole 2 to the supply connection portion 17.

In the above-described embodiment, the shutoff device is shown as the shutoff plate 12 which is below the raw material supply hole 2 of the raw material container 1 and shuts off the supply passage between the raw material supply hole 2 and the measuring section 7. It is not necessary to be on the underside of the container, but in the container, for example, the rotor blade 9 is configured to close the raw material supply hole 2, the scraping operation is finished, and the weighing operation of the weighing section 7 is started (that is, movement of If it is stopped or stopped without stopping until the (start) time, it functions as a blocking device. In short, when the metering section performs the metering operation, if the communication with the inside of the container 1 via the material supply hole 2 is interrupted in some way, the backflow of the material can be prevented to some extent.

To explain the process of measuring and supplying, the operation sequence of the blocking plate 12 and its action, first, in the position of FIG.
The metering section 7 is vertically aligned with the raw material supply hole 2 of the container 1, and the blocking plate 12 is in the retracted position so that they communicate with each other.
The space between the communication opening of the blocking plate support 13 and the supply connection 17 is filled. At this time, a strip-shaped raw material supply hole 2 is provided in the bottom surface 1a of the raw material container 1, and a rotary blade 9 is provided around the rotary shaft 8 with respect to the raw material supply hole 2 as a bottom surface 1.
Since the material is rotationally moved while sliding a, the raw material is subjected to a scraping operation so that the raw material supply hole 2 is vertically aligned to communicate with the opening of the blocking plate support 13, that is, the supply connection portion 1
7, the upper plate 14, the lower plate 15, the spacer 16 and the opening of the measuring section 7 are reliably pushed, and there is no backflow or void in the raw material container 1 and the measuring error is surely prevented. Further, when the raw material is mixed with acrylic fiber, glass fiber, carbon fiber, metal fiber or a mixture thereof, the rotary blade 9 is surely scraped off the raw material supply hole 2 to ensure that the fiber is scraped. It is useful for surely preventing the pulling back into 1, the reverse flow of the raw material, and the generation of voids, and the reliable measurement without error. From this position, first, when the shut-off plate 12 moves forward by the operation of the second hydraulic (or air) cylinder 18 to reach the position shown in FIG. 3a, the weighing compartment 7 is closed and below the container 1, that is, above the weighing compartment 7. Communication with the raw material supply hole 2 is hindered. Next, the first hydraulic cylinder 5 is actuated to move the metering / feeding device 6 forward so that the metering section 7 containing a precisely weighed amount of the raw material is moved from the supply hole aligning position to the drop hole aligning position (Fig. 3b). Refer to the above) and slide it on the bottom plate 3 without any change in volume. When the measuring section 7 reaches the position of the drop hole 4, the raw material is accurately dropped by gravity toward the raw material supply portion to the molding die or the die of the molding apparatus at the dropping position. At this time, since the upper part of the measuring section 7 which coincides with the drop hole 4 communicates with the outside air by releasing the interruption by the lower plate 15, the measured constant amount of the raw material is measured by gravity even when the viscosity is high. Instead of staying in the mold, it smoothly falls into a predetermined position in the molding device. 1
The metering section 7 which has been supplied once is moved from the dropping hole position to the raw material supply hole aligning position (3c) by the returning operation of the first cylinder 5.
(See the figure). At this time, the shut-off plate 12 is in the shut-off position, but next, it is returned to the retracted position as shown in FIG. 2 so that the weighing section 7 is in complete communication with the raw material supply hole 2 and thus the inside of the container 1. Then, one measuring and supplying cycle is completed. The blocking plate 12 does not necessarily have to stay in the blocking position until the metering compartment 7 has completed one complete reciprocation.
As shown in the embodiments of FIGS. 2 and 3a, the metering and feeding device 6 always has an upper surface which is in contact with the periphery of the communication opening provided in the lower plate 15 of the blocking plate support 13 regardless of its movement. As long as the upper surface closes the opening of the lower plate 15 of the support body 13 and the blocking plate 12 starts to retreat at the same time, the raw material descending into the space is supported by the upper surface of the metering and feeding device. . In that case, as shown in the drawing, if the vertical dimension of the opening of the entire blocking plate support 13 is at least the same as the vertical dimension of the weighing compartment 7, the supply connection 17 may be omitted. The above-mentioned reserve section is provided. However, the shielding plate 12 in the drawing
And its support 13 are exaggeratedly written and normally it is better to have a supply connection.

The front end of the blocking plate 12 has a lower surface that is inclined rearward (right side) toward the lower side of the upper edge, and it is conceivable that the upper edge of the front end cuts the fiber. It has the function of pushing the material, and serves to reduce the tendency of the lower raw material to return upward.

4a and 4b show a second embodiment of the invention,
The bottom plate 3'is slidably mounted on a support rod 4'provided on the machine frame, and is connected to an operating plate 6'provided on a piston rod 11 'which extends outwardly from the first cylinder 5'and expands and contracts. It operates to open and close the bottom opening of the fixedly supported raw material metering compartment 7 '. Above the weighing section 7'is a blocking plate support 13 'for guiding the blocking plate 12', which support 13 'is
There is a spacer 16 'between the upper plate 14' and the lower plate 15 ',
The fixed portion 19 of the upper plate 14 'and the lower plate 15' is supported by the machine frame that supports the raw material container 1 and the raw material measuring section 7 ', and the movable portion of the lower plate 15' together with the bottom plate 3'is the first cylinder 5 '. ′ Is provided so as to be movable, has an opening aligned with the upper opening of the raw material supply hole 2 and the measuring section 7 ′, and is capable of reciprocating between an alignment position and a position completely retracted from the alignment position, At the time when the blocking plate 12 blocks this passage in this retracted position, the space below the blocking plate 12 can be communicated with the atmosphere, which allows the raw material measured in the measuring section 7'to fall. To

To briefly describe the operation process of the second embodiment, the raw material is supplied from the raw material container 1 to the measuring section 7'in FIG. 4a. Next, the second cylinder 18 extends the piston rod to open the blocking plate 12. Slide from right to left to interrupt the supply passage above the metering compartment 7 '. Next, the first cylinder 5'is retracted from the extended state of the piston rod 11 '(from left to right), and the bottom plate 3'and the blocking plate supporter respectively connected to the operating plates 6'provided on this rod 11'. 13 'lower plate 1
5'is moved from the left to the right so that the upper and lower openings of the weighing section 7'communicate with the atmosphere to allow the raw material to fall naturally. Next, the first cylinder 5'actuates to return the bottom plate 3'and the lower plate 15 'of the blocking plate support from right to left to close the bottom opening of the weighing compartment 7', and then the blocking plate 12 to the second. The cylinder 18 is actuated to the right to connect the container 1 and the weighing compartment 7'to connect the
Returning to the figure, one cycle is completed.

As described above, according to the present invention, a blocking device for blocking the communication between the raw material supply hole provided on the bottom surface of the raw material container and the measuring section is provided below the raw material supply hole, and the metering / feeding device is formed from the raw material measuring position. It is provided so that it can be moved back and forth by a drive device to the dropping position with respect to the device, and the communication between the inside of the raw material container and the measuring compartment is cut off before the raw material measuring operation, and the upper part of the measuring compartment communicates with the atmosphere when the raw material is charged into the molding device. Therefore, even if the viscosity of the raw material is high regardless of the viscosity of the raw material, the leakage of the raw material after the measurement including the one mixed with the fiber is eliminated and the measurement error is eliminated, and a certain amount of The raw material can be metered, and after the metering, a constant amount of the raw material can be smoothly fed to a predetermined position by gravity without staying in the molding device.

[Brief description of drawings]

FIG. 1 is a plan view of a material / feeding device according to a first embodiment of the present invention, FIG. 2 is an elevation sectional view taken along line II-II of FIG. 1, and FIGS. In the enlarged partial view of the figure,
A process chart is formed together with FIG. 4a and 4b are elevation sectional views of a raw material metering and feeding device according to a second embodiment of the present invention, showing two positions of its working steps. 5a and 5b are elevation sectional views of a metering and dispensing device according to the prior art, each showing two positions of the working process. 2 ... Raw material supply hole, 4 ... Drop hole, 7 ... Measuring section, 1
2 ... Barrier plate, 13 ... Barrier plate support.

Claims (3)

[Claims] 1. A raw material container having a raw material supply hole on the bottom surface, a bottom plate having a dropping hole to a forming device which is located below the raw material container and is horizontally separated from the raw material supply hole, and on the bottom plate. There is a raw material metering / feeding device for cement mortar molded articles equipped with a weighing / feeding device having a weighing section that reciprocates between the raw material supply hole and the drop hole, and slides on the bottom surface of the raw material container. A rotary blade that rotatably moves the raw material supply hole is rotatably provided in the raw material container, and a shutoff device that shuts off the communication between the raw material supply hole and the measuring section is provided below the raw material supply hole. A member having a flat surface for slidably supporting the plate is movably connected to the drive unit together with the bottom plate, and the raw material supply hole can be communicated with the upper part of the weighing partition when the bottom plate opens the bottom surface of the weighing partition. To communicate with the atmosphere Material weighing and supplying apparatus cement mortar molded article characterized by. 2. A raw material metering / feeding device for cement mortar molded articles according to claim 1, wherein a closing plate for the raw material supply hole is provided in the raw material container. 3. The measuring section is fixed to a machine frame supporting a raw material container, the bottom plate moves to move so as to open and close the bottom surface of the measuring section, and the raw material supply hole and the above are provided above the measuring section. The raw material metering / supplying device for a cement mortar molded article according to claim 1, further comprising a blocking plate capable of blocking communication with the weighing section.