JPH01285309A - Device used both as measurement and supply of raw material of molded cement mortar product - Google Patents

Abstract

PURPOSE:To enable the title device to perform swift-measurement and delivery without generating a measurement error of raw materials, by providing an interrupting device capable of interrupting communication between the inside of a raw material vessel and a measuring section prior to measuring action. CONSTITUTION:When an interrupting plate 12 is moved forward by an action of a second hydraulic cylinder 18, a measuring section 7 is closed to interrupt communication with a raw material supply hole 2 of a vessel 1. Then a device 6 used both as measurement and feeding is moved forward by actuating a first hydraulic cylinder 5 and the measuring section 7 is slid on a bottom sheet 3 from a supply hole adjusting position up to falling hole adjusting position. When the measuring section 7 arrives at a position of a falling hole 4, raw materials fall toward a raw material supply part to a mold of a molding mold or a molding device with device with gravity. The measuring section 7 whose one time supply is finished is returned to the raw material supply hole adjusting position from falling hole position. In this instance, it follow that though the interrupting plate 12 is at an interrupting position, then the same is returned to a backward movement position and that the measuring section 7 communicates with the raw material supply hole 2 to complete one time measurement and supply cycle. With this construction, measurement is performed correctly at the time of falling of the raw materials by moving the measuring section.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a raw material metering and feeding device for molded products such as roof tiles such as concrete and mortar, floor boards and other building materials.

(Prior Art) Such an apparatus includes a raw material container having a raw material supply hole, a bottom plate having a drop hole to a molding device located below the raw material container and spaced horizontally from the raw material supply hole, and A metering/feeding device having a metering section on the bottom plate and reciprocating between the feed hole and the drop 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, as schematically shown in FIGS. 5a and 5b. is provided and fixed so as not to move relative to the container 1. The bottom plate 3 is provided with a drop hole 4 horizontally spaced apart from the raw material supply hole 2, and a metering/feeding device that 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 is configured so that it can reciprocate between a position aligned with the raw material supply hole 2 (Fig. 5a) and a position aligned with the drop hole 4 (Fig. 5b). It has a weighing section that is

The metering 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 l as shown in Fig. 5a, the lower open part of the section 7 is closed by the bottom plate 3, and with one batch of weighed raw material in the compartment, the weighing/feeding device 6 moves to the right by the operation of the hydraulic cylinder 5, and the weighing compartment 7 passes through the drop hole 4 of the bottom plate 3.
When the measured raw material reaches the position shown in FIG. 5b that is aligned with the above, the measured raw material falls through the drop hole 4 and is 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.

8 is a rotating shaft 10 of a rotary blade 9 that performs a cutting operation.

Due to the structure described above, although the structure is simple, measurement is quick and reliable, and it is widely used.

However, in this device, when the weighing compartment moves to the drop hole and performs weighing and feeding operations, the weighing compartment 7 and the inside of the container 1 communicate through the raw material supply hole 2 at the start of the operation, so the weighing The raw material in the compartment may flow back into the container and the measured raw material may not be completely supplied to the drop hole, resulting in inaccurate metering. In particular, the viscosity of the raw material is relatively high,
Also, in the case of fibrous materials such as acrylic fibers, glass fibers, carbon fibers, metal fibers, etc., or mixtures of these materials, they may be mixed in when the raw materials are introduced into the measuring section and weighed. The fibers are pulled from the cut edge,
A void was created in the internal volume, resulting in a measurement error and making it difficult to accurately measure the volume. Furthermore, even with low viscosity raw materials, it is not possible to avoid backflow of the raw material due to the pressure when moving the measuring compartment, and there is a limit to its accuracy, and there are also restrictions on the moving speed of the measuring compartment.

(Problems to be Solved by the Invention) Therefore, the present invention provides a raw material metering and feeding device for cement mortar molded products that has a simple structure and can perform relatively reliable metering, regardless of the viscosity of the raw material. It is an object of the present invention to provide a metering/feeding device capable of quickly metering and feeding raw materials, including those mixed with fibers, without causing measurement errors.

(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, and a molding device located below the raw material container and spaced horizontally from the raw material supply hole. A raw material metering and feeding device for a cement mortar molded product, comprising a bottom plate having a hole, and a metering and feeding device having a metering section that is located on the bottom plate and reciprocates between the raw material supply hole and the drop hole,
The object of the present invention is to provide the above-mentioned raw material measuring and supplying device, characterized in that it is provided with a cutoff device capable of cutting off communication between the inside of the raw material container and the above-mentioned measuring section before the measuring operation.

Further, the above-mentioned problem is solved by a cement container including a raw material container having a raw material supply hole, a bottom plate located on the lower side of the raw material container and separated from the raw material supply hole, and a measuring section that is in contact with the bottom plate and can communicate with the raw material supply hole. The measuring section is fixed to a machine frame that supports a raw material container, and the bottom plate moves to open and close the bottom of the measuring section, and the upper side of the measuring section is fixed to a machine frame that supports a raw material container. The problem can also be solved by providing the above-mentioned raw material metering and supplying device, characterized in that a blocking plate is provided to cut off communication between the raw material supply hole and the above-mentioned measuring section.

(Effects) The device for measuring and supplying raw materials for cement mortar molded products of the present invention having the above-described configuration allows the raw materials supplied from the supply hole of the raw material container and occupying the entire measuring section to be placed above the section by a blocking plate. It is closed to form a semi-perfectly sealed compartment, which allows accurate metering as the material moves through the metering compartment and falls. This is due to the shearing action between the upper front edge of the metering compartment and the edge of the feed channel that contacts the upper edge of the metering compartment, which tends to cause the material to escape upwards in the feed channel. The material is pulled upwards along with the fibers, creating voids in the material in the metering compartment.
This has caused measurement errors, but with the shielding plate in the device of the present invention, the upper part of the plane where the shearing action occurs during the metering operation forms a cavity in the shielding plate whose upper surface is closed. This is thought to be because there is no escape and there is no room for measurement errors. It has been found that even at low viscosities, accuracy can be increased in response to demanding requirements.

(Embodiments) The above and other features of the present invention will be described in further detail with reference to the accompanying drawings, which illustrate one embodiment of the present invention.

1, 2, and 3a to 3C show a first embodiment of the present invention, which corresponds to members 1 to 9 shown in the conventional example shown in FIGS. 5a and 5b. are indicated by the same number. A raw material supply hole 2 is provided at one location on the bottom wall of the circular container 1.
However, from the viewpoint of viscosity, the rectangular opening is selected depending on the molding space. There is a bottom plate 3 having a drop hole 4 provided at a fixed distance from the supply hole 2 in the horizontal direction.

This drop hole 4 may be provided directly above the molding die, or
Another supply section may be provided between the mold and the mold. On the bottom plate 3, a metering and feeding device 6 slidably provided by a first hydraulic cylinder or pneumatic cylinder 5 is provided with a metering section 7 having a cross section equal to the raw material supply hole 2 at its tip; When the piston rod 11 of the cylinder 5 is deeply retracted into the cylinder, it is aligned with the raw material supply hole 2 (see Figures 2, 3a, and 3C), and the piston rod 11 is fully extended. In position (see FIG. 3b) the metering compartment 7 is aligned with the drop hole 4 in the base plate 3. It is clear that the cylinder 5 can also be a mechanical drive by an electric motor.

On the upper surface of the metering/feeding device 6, there is a blocking plate support 13 that guides the blocking plate 12, and the support 13 has an upper plate 14 and a lower plate 15.
There is a spacer 16 between the upper and lower plates 14, which is entirely supported by the machine frame that supports the bottom plate 3 and the raw material container 1.
15 and spacer 16, the measuring compartment 7 and container 1
An opening or an opening portion vertically aligned with the raw material supply hole 2 is provided in the spacer 16, and a space adjacent to this opening portion and in which the blocking plate 12 is guided is provided integrally with this opening portion. , the spacer 16 is sandwiched between the upper and lower plates 14 and 15 so as to surround this space. Although it is also possible to provide the lower surface of the raw material container 1, and thus the upper surface of the support body 13 that supports the blocking plate 12, in direct contact with the raw material supply hole 2 of the container 1, as shown in the figure, the raw material supply hole 2 of the container 1 and the blocking plate A supply connection 17 can be provided between corresponding openings of the support 13, the openings of which are aligned. If this space is made to have at least the same volume as the volume of the metering compartment 7 below it, that space becomes a backup compartment for the metering compartment 7, making it possible to reasonably increase the speed of metering and supply. The blocking plate 12 is connected to the metering compartment 7 by means of a second hydraulic cylinder (or pneumatic cylinder) 18.
is vertically aligned with the raw material supply hole 2 of the container 1, it is capable of reciprocating between a retracted position where these communicate with each other and an advanced position where both are completely blocked. Two rotary blades 9 can be seen symmetrically inside the container 1, and these are connected to the rotating shaft 8 by a connecting rod 19.

In the above embodiment, the blocking device is shown as a blocking plate 12 which is located below the raw material supply hole 2 of the raw material container l and blocks the supply passage between the raw material supply hole 2 and the measuring section 7. It is not necessary that the rotor blade 9 be located at the bottom of the container, but should be in a shape that closes the raw material supply hole 2, for example, so that when the slicing operation is finished, the metering operation of the metering section 7 begins (i.e., the movement of the rotor blade 9). If it is stopped or closed without stopping until the start time, it will function as a shutoff device. In particular, when the metering section performs a metering operation, if communication with the inside of the container 1 via the raw material supply hole 2 is blocked in some way, backflow of the raw material can be prevented, albeit to some extent.

To explain the measuring and supplying process, the operation sequence of the blocking plate 12, and its function, first, in the position shown in Fig. 2,
The metering compartment 7 is vertically aligned with the raw material supply hole 2 of the container 1, and the shielding plate 12 is in the retracted position, so they communicate with each other, and the cutting action of the rotor blade 9 allows the raw material to be transferred to the metering compartment 7 and the shielding plate support. It fills the space of the communication opening of the body 13 and the supply connection 17. From this position, first the blocking plate 12 is
Move forward by the operation of the hydraulic (or pneumatic) cylinder 18 and move to the third a
Once in the position shown, the metering compartment 7 is closed and communication with the raw material supply hole 2 of the container l is prevented. The first hydraulic cylinder 5 is then actuated to advance the metering and feeding device 6 and the metering compartment 7
is slid on the bottom plate 3 from the supply hole alignment position to the drop hole alignment position (see Figure 3b). When the metering section 7 reaches the position of the drop hole 4, the raw material falls by gravity toward the molding die or the raw material supplying part to the mold of the forming apparatus. After one feeding, the measuring section 7 is returned from the drop hole position to the raw material supply hole alignment position (see FIG. 3C) by the return operation of the first cylinder 5. At this time, the blocking plate 12 is in the blocking position, but then it is returned to the retracted position, as shown in FIG. , and one measurement and supply cycle is completed. The blocking plate 12 does not necessarily need to remain in the blocking position until the metering compartment 7 has made one complete reciprocation. Figures 2 and 3a
As shown in the embodiments shown in the figures, as long as the weighing and feeding device 6 has an upper surface that is always in contact with the lower plate 15 of the barrier plate support 13 at the circumference of the connecting gate, regardless of its movement, the support 13 Even if the blocking plate 12 starts to retreat at the same time as the upper surface closes the opening of the lower plate 15, the raw material that has descended into that space will be supported by the upper surface of the metering and feeding device. In that case, the supply connection 17 may be omitted if the vertical dimension of the opening of the entire barrier plate support 13 is at least the same as the vertical dimension of the metering compartment 7, as shown. A reserve section like the one above will be provided. However, the blocking plate 12 and its support 13 are exaggerated in the drawings, and supply connections would normally be present.

The front end of the blocking plate 12 is located downwardly backward (on the right side) from the upper edge.
It has a lower surface that is slanted to the top, and the upper edge of the front end may be used to cut fibers, and the slanted lower surface serves to push the raw material downward, and the function is to reduce the tendency of the lower raw material to return upward. do.

Figures 4a and 4b show a second embodiment of the invention,
The bottom plate 3' is connected to an actuating plate 6' provided on a piston rod 11' that extends and retracts outward from the first cylinder 5' so as to be able to slide on a support rod 4' provided on the machine frame. It operates to open and close the bottom opening of the fixedly supported raw material metering compartment 7'. Above the metering compartment 7' there is a barrier plate support 13' for guiding the barrier plate 12', the support 13' having a spacer 16' between the upper plate 14' and the lower plate 15'; The fixing part 19 of the upper plate 14' and the lower plate 15' is the raw material container 1.
The movable part of the lower plate 15' is connected to the first cylinder 5 together with the bottom plate 3'.
It is movably provided by ', has an opening aligned with the raw material supply hole 2 and the upper opening of the measuring section 7', and is capable of reciprocating between an alignment position and a position completely retracted from the alignment position, 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, thereby allowing the material weighed in the weighing section 7' to fall. Make it.

To briefly describe the operation steps of the second embodiment, in FIG. 4a, raw material is supplied from the raw material container 1 to the metering section 7', and then the second cylinder 18 extends the piston rod and closes the blocking plate 18. By sliding from right to left, the supply channel is interrupted above the metering compartment 7'. Next, the first cylinder 5' is retracted (from left to right) from the extended state of the piston rod 11', and the bottom plate 3' and the blocking plate support are respectively connected to the actuating plate 6' provided on the rod 11'. 13' lower plate 15'
is moved from left to right to communicate the upper and lower openings of the metering section 7' with the atmosphere, allowing the raw material to fall naturally. The first cylinder 5' is then actuated to move the bottom plate 3' and the lower plate 15' of the blocking plate support back from right to left to close the bottom opening of the metering compartment 7', and then move the blocking plate 12 to the second The cylinder 18 is actuated to the right to communicate the container 1 and the metering compartment 7', returning to FIG. 4a to complete one cycle.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a raw material/supply device according to a first embodiment of the present invention, Fig. 2 is an elevational sectional view taken along the line ■-■ in Fig. 1, and Fig. 3a
3C is an enlarged partial view of FIG. 2, and together with FIG. 2 forms a process diagram. 4a and 4b are elevational cross-sectional views of a material metering and feeding device according to a second embodiment of the invention, showing two positions of its working process; FIG. Figures 5a and 5b are elevational sectional views of a conventional metering and dispensing device, each showing two positions in the working process. 2... Raw material supply hole, 4... Fall hole, 7... Measuring compartment, 12... Blocking plate, 13... Blocking plate support. Patent applicant Shigeo Ando Figure 1 Figure 2 (G) (b) (C) Figure 3

Claims (1)

[Scope of Claims] (1) A raw material container having a raw material supply hole, a bottom plate having a drop hole to a molding device located below the raw material container and spaced horizontally from the raw material supply hole, and the bottom plate. A raw material metering and feeding device for a cement mortar molded product, comprising a metering and feeding device located above and having a metering section that reciprocates between the raw material supply hole and the falling hole, The raw material measuring and supplying device described above is characterized in that it is provided with a cutoff device that can cut off communication with the measuring compartment. (2) The device according to claim 1, wherein the blocking device is a blocking plate that can block communication between the raw material supply hole and the measuring section below the raw material supply hole. (3) The apparatus according to claim 1, wherein the shutoff device is the raw material supply hole closing plate located in the raw material container. (4) A cement mortar comprising a raw material container having a raw material supply hole, a bottom plate located below the raw material container and separated from the raw material supply hole, and a measuring section that is in contact with the bottom plate and can communicate with the raw material supply hole. As a material measuring and feeding device for molded products,
The measuring compartment is fixed to a machine frame that supports a raw material container, the bottom plate moves to open and close the bottom surface of the measuring compartment, and the raw material supply hole and the measuring compartment communicate with each other on the upper side of the measuring compartment. The above-mentioned raw material measuring and supplying device is characterized in that it is provided with a shielding plate that can shut off. (5) A member having a flat surface that slidably supports the blocking plate is movably connected to a drive device together with the bottom plate, and when the bottom plate opens the bottom surface of the measuring compartment, the measuring compartment and the raw material supply hole are connected to each other. 5. The apparatus according to claim 4, wherein the downstream side of the blocking plate of the passage communicating with the air is communicated with the atmosphere.