JPS6013807B2 - Continuous conveyance device for extruded cement-based composition plates - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous conveyance device for extruded plates of cementitious compositions.

Cement-based compositions have cement as the main material, and silica sand and
It is a mixture of auxiliary materials such as asbestos and shirasu balloons, but conventionally, water was added to this cement-based composition,
The mixture is kneaded and fed to the extruder, and then continuously extruded from the die of the extruder to form a continuous plate-shaped body.The plate-shaped body is then cut into a certain length and extruded as a unit. Molding plates are being carried out.

By the way, the cement-based composition plate extruded from the above-mentioned die gradually hardens as the hydration reaction progresses, but it takes a long time to fully harden, and it is difficult to cut the continuous plate. When the extrusion-molded plate is made into a unit, it is in an extremely soft state, so the extrusion-molded plate may be damaged during the period between extrusion from the die and cutting, cutting, or transportation after cutting. deformed,
The shape of the cured molded product may be damaged.

The present invention has been made in view of the above circumstances, and it maintains a plate extruded from a die or an extrusion molded plate obtained by cutting the same in a securely protected state without deforming it. It is an object of the present invention to provide a continuous conveyance device for extrusion molded plates of cement-based compositions, which can continuously and automatically shape extrusion molded plates of a certain shape to improve the molding speed. Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 schematically show a continuous conveyance device according to the present invention. In these figures, reference numeral 1 is an extruder, and a cement-based extruder is supplied from a hopper 2 provided at the top of the extruder. The composition is extruded from a die 3 using an internal screw (not shown) and simultaneously formed into a plate shape.

In front of the extruder 1 (on the right side in the figure), a speed detection Kosobair 4 is arranged adjacent to the die 3.
This speed detection conveyor 4 includes, for example, a belt wound around a pair of rollers so as to rotate freely, and this belt rotates together with a plate-shaped body A made of a cement composition that is continuously extruded from the die 3. When the belt or roller is rotated, the rotation of the belt or roller is electrically detected as the moving speed of the plate-like body A using a generator, rotary encoder, etc. is being done. Further, in front of the speed detection conveyor 4, a transport conveyor 5 and a transfer conveyor 6 are arranged so as to be inclined so that their respective upper surfaces are flush with the upper surface of the speed detection conveyor 4. These transport conveyor 5 and transfer conveyor 6 are belt conveyors driven by a motor, for example, and their driving speed is determined to be the extrusion speed of the plate-like body A based on a speed signal issued from the speed detection conveyor 4. are controlled to be the same. In addition, the speed detection conveyor 4, the transport conveyor 5, and the transfer conveyor 6
It is preferable that the angle of inclination is at most about 20 degrees with respect to the horizontal plane, and by doing so, it is possible to prevent the plate-like body A from sagging due to its own weight and from being deformed due to this. A table lifter 7 that is moved up and down by a hydraulic or pneumatic device is arranged below the transfer conveyor 6, and a pallet conveyor 8 is provided on the table lifter 7. At this time, the pallet 9 is placed on the pallet conveyor 8, and when the table lifter 7 rises in this state, the pallet conveyor 8
is operated to send the pallet 9 to the lower end of the transfer conveyor 6.

Note that the pallet 9 here receives the plate-like bodies A from the transfer conveyor 6, and its shape may be any shape as long as it can stack the plate-like bodies A, but it is preferably a pallet of the shape as a product. It has a U-shaped cross section with both side walls rising to the same length as the extrusion molded plate. Also, this palette 9
A conveyor (not shown) along the direction orthogonal to the pallet conveyor 8
a pallet conveyor 8, in which the pallet 9 is intermittently sent by this conveyor, or a pallet conveyor 8
A conveyor (not shown) is arranged parallel to the pallet conveyor 8, and the pallet 9 on the conveyor is pressed by a fluid pressure actuator to be placed on the pallet conveyor 8. In addition, a pallet conveyor 11 having a nip device 10 and another pallet conveyor 12 are successively provided in front of the transfer conveyor 6 so as to be at the same height as the pallet conveyor 8 located directly at the upper limit. The pallet 9 is conveyed at the same speed as the plate-like body A.

Rails 13 are provided on both sides of the pallet conveyor 12.
A cutting device 14 is provided on this rail 13 so as to straddle the pallet conveyor 12, and moves at the same speed as the pallet 9 to cut each pallet 9.
It is configured to cut the plate-like body A at the contact portion. Note that various means for detecting the contact portion of each pallet 9 to cut the plate-shaped body A can be selected. For example, a dog may be attached to the front end or rear end of each pallet 9, and this dog may be used to detect the appropriate IJ. It may be configured to detect by operating a mitt switch.
A free loaf conveyor 15 and a high-speed conveyor 16 are disposed in succession in front of the pallet conveyor 12, and the pallet 9 after the cutting operation of the plate-shaped body A is completed is carried by the free roller conveyor 15 at high speed. The pallet 9 is delivered to a conveyor 16, and then transferred to, for example, a palletizer (not shown) by the high distance conveyor 16, loaded thereon, and sent to a curing process.

Next, the operation will be explained.

In advance, a cement-based composition containing cement as the main component is mixed with water in a mixing tank (not shown), sufficiently kneaded in a mixer (not shown), and then fed into the extruder 1 from a hopper. do.

The cementitious mixture supplied into the extruder 1 is pushed by a screw and extruded from a die 3, and at the same time is formed into a plate-like body A according to the shape of the die 3. The extrusion speed of this plate-shaped body A is detected by passing it on the speed detection conveyor 4, and the resulting speed signal is transmitted to the conveyor 5, the transfer conveyor 6, the pallet conveyor 8, and the pallet conveyors 11 and 12. and each of these conveyors 5,
6, 8, 11, and 12 operate at the same speed as the extrusion speed of plate-like body A. The extruded and molded plate A is sequentially sent forward by a transport conveyor 5 and a transfer conveyor 6, and each of these conveyors 5 and 6 operates at the same speed as the extrusion speed of the plate A. In addition, since the plate-like body A is tilted so as to descend at the front side, the plate-like body A does not sag and change, but maintains the shape formed by the die 3. On the other hand, the table lifter 7 moves upward and the pallet conveyor 8 is driven, and as a result, the pallets 9 sent to the pallet conveyor 8 are transferred to
is fed to the lower end of the plate at the same speed as the forward movement speed of the plate-like body A, and simultaneously fed to the pallet conveyor 11.

The plate-like object A transported by the transfer conveyor 6 is then transferred onto the pallet 9. Thereafter, when the pallet 9 is gripped by the nipping device 10, the table lifter 7 descends and reaches the lower limit position, the pallet conveyor 8 stops, and the subsequent pallet 9 is conveyed onto it, and then the table lifter 7 As the pallet 7 rises, the pallet conveyor 8 operates to bring the succeeding pallet 9 into contact with the preceding pallet 9 and send it forward. The table lifter 7 and the pallet conveyor 8 repeatedly perform such an operation, and the pallets 9 are brought into contact with each other and continuously sent to the pallet transport conveyor 11. Therefore, the plate-shaped bodies A to be continuously extruded are brought into contact with each other and are continuously sent to the pallet transport conveyor 11. It is placed on each successive pallet 9. The pallets 9 on which the plate-like bodies A are layered are sent forward on the pallet transport conveyors 1 and 12 while in contact with each other, but when the mutual contact between the pallets 9 reaches the cutting device 14, the cutting device 14 moves forward on the rail 13 at the same speed as the pallet 9 and cuts the plate-shaped body A at the contact portion, and then the cutting device 14 moves backward on the seal 13 and returns to its original position. .

The cutting device 14 repeatedly performs such an operation to sequentially cut the plate-like body A into the length of an extrusion-molded plate to be made into a product.
The pallet 9 whose cutting work has been completed in this way is moved forward on the pallet transport conveyor 12 and transferred to the free roller conveyor 1.
5 to a high-speed conveyor 16, and then separated from the subsequent pallet 9 by the high-speed conveyor 16 and sent to, for example, a palletizer.

Thereafter, the cut plate-shaped body A is handled while being sent to the pallet 9, and is not deformed. As explained above, according to the present invention, the plate-shaped body extruded from the die is conveyed by the first conveyor that operates at the same speed as the plate-shaped body, and the plate-shaped body is transferred to the second conveyor at the lower end of the first conveyor. The pallets that are continuously fed in at the same speed as the plate-shaped body on a conveyor are further conveyed by a third conveyor at the same speed as the extrusion speed of the plate-shaped body.
Since the plate-shaped body is configured to be cut by the cutting device at the contact portion of each pallet, the plate-shaped body that has not yet hardened and is in a continuous state can be cut during transportation, transfer to a pallet, and cutting. There is no risk of deformation during handling such as curing after completion of cutting, and therefore, an extrusion molded plate of a fixed shape made of a cement composition can be continuously and automatically molded, and the molding speed can be improved. I can do it.

Note that if the conveyor that conveys the plate extruded from the die is tilted forward at a predetermined angle before being transferred to the pallet, deformation due to slack will not occur during the conveyance.

[Brief explanation of the drawing]

FIG. 1 is a side view schematically showing one embodiment of the present invention, and FIG.
The figure is a plan view thereof. 1... Extruder, 3... Die, 6... Transfer conveyor (first conveyor), 7... Table lifter, 8... Pallet conveyor (
2nd conveyor), 9...Pallet, 11, 12... Pallet transport conveyor (third conveyor), 14... Cutting device, A... Plate-shaped object. Figure 1 Figure 2

Claims (1)

[Claims] 1. A first conveyor that conveys cement-based composition plates that are continuously extruded from a die of an extruder in the same direction at the same extrusion speed and extrusion direction, and a table lifter provided below the first conveyor. , a second conveyor provided on the upper surface of the table lifter and continuously conveying the pallets fed thereto to a lower end of the first conveyor;
A third conveyor is disposed at the leading end of the conveyor and moves the pallet in the same direction as the extrusion direction of the cement-based composition plate.
An extrusion molded plate of a cementitious composition, comprising: a conveyor; and a cutting device positioned on the third conveyor to cut the cementitious composition plate at the contact portion of each of the pallets. Continuous conveyance device.