JPS647567B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing an extrusion molded plate of a cementitious composition.

Cement-based compositions have cement as the main component,
This is mixed with auxiliary ingredients such as silica sand and asbestos, and a plasticizer.

Conventionally, for example, to manufacture cement-based building materials, water is added to the above-mentioned cement-based composition, kneaded, fed to an extruder, extruded through a die of the extruder to form a continuous long plate-shaped body, and then A desired building material is obtained by cutting a plate-shaped body into a certain length.

A typical manufacturing device of this kind has an extruder followed by several sets of belt conveyors and a conveyor for conveying pallets, and the extruded plate is cut on the first belt conveyor. The cut surfaces are brought into contact with each other to form a cut seam, and the feed speeds of the second and subsequent belt conveyors and the pallet transfer conveyor are made slightly faster than the feed speeds of those located upstream, that is, on the extruder side, and the belt conveyor The plate-shaped body with the cut seam separated between the belt conveyor and the belt conveyor is transferred to a pallet on a pallet transfer conveyor, and sent to a curing process. In this case, the lower edge of the outlet of the die and the upper surface of the several sets of belt conveyors are substantially on the same plane, and the upper surface of the pallets on the pallet transport conveyor is slightly lower than them. The reason why multiple sets of belt conveyors are used in the above-mentioned apparatus is that when cutting seams are separated by a difference in the feed speed of the belt conveyors, the plate-like material is elongated by gradually increasing the difference in feed speed in stages. This is to prevent breakage, but it is difficult to control the alignment between the cut seam and the gap between the belt conveyors and often causes deformation of the plate.

However, it takes a considerable amount of time for the plate extruded from the die to harden sufficiently to maintain its shape.
During the above process, it is in a relatively soft and unstable state. Therefore, when a plate-shaped body that has formed a cut seam but has not yet been completely separated between the cut seams is moved on several sets of belt conveyors, a meandering shape is created at the leading and trailing ends of the plate-shaped body at the transfer point. deformation occurs, resulting in poor product yield. On the other hand, if it is attempted to prevent such meandering, the device becomes large and the installation area increases, which is also uneconomical.

The present invention has been made in consideration of the above-mentioned drawbacks, and is a method and apparatus for manufacturing cementitious board material, in which the cementitious board material continuously extruded from an extruder is kept at a certain level during transportation and before being transferred to a pallet. Cutting is performed by forming removal allowances at small intervals before and after each interval length, and the removal allowances are also removed during transportation.

The present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a cementitious composition supplied from a hopper 2 provided at the upper part of an extruder 1 is continuously extruded from a die 3 by a screw (not shown) provided inside the extruder 1 to produce a cementitious plate material A. form. An extrusion speed detection belt conveyor 4 is provided in connection with the extruder 1.

The extrusion speed detection belt conveyor 4 is formed by winding a belt around a pair of free rollers, for example, so that the belt is rotated in contact with the cement plate material A extruded from the die 3, and the belt or Using a speed signal obtained by electrically detecting the moving speed of the cement board A using a generator or rotary encoder, etc., the rotation of the roller is used to determine the speed of the conveyor for transporting the cement board A, which will be described below. The extrusion speed is controlled to be approximately equal to the extrusion speed.

Connected to the extrusion speed detection belt conveyor 4, the cement plate transfer conveyor 5 has an inclined transfer section 6.
The belt conveyor 4 is arranged so that its upper surface is on the same plane as the upper surface of the extrusion speed detection belt conveyor 4.
The conveyor 5 is actively driven as described above by a motor (not shown) or the like.

A table lifter 7 which is moved up and down by hydraulic or pneumatic pressure is provided below the cement board conveyor 5, and a pallet conveyor 8 is provided on the lifter 7. The table lifter 7 is lowered to place the pallet 9 supplied from a direction perpendicular to the conveyor 8 on the pallet conveyor 8, and then when the table lifter 7 is raised, the pallet conveyor 8 rotates and the pallet 9 is placed on the pallet conveyor 8. The pallets are conveyed in a continuous manner to a pallet conveyor 10 provided below the plate conveyor 5. The pallet conveyor 10 extends forward from the pallet conveyor 8 through the lower part of the above-mentioned transfer section 6, and is conveyed at approximately the same speed as the cement board conveyor 5.

Rails 13 are arranged on both sides above the conveyor 5 for transporting cement plates, and a carriage-shaped removal allowance cutting device 15 for cement plate material A is mounted on the rails 13 so as to straddle the conveyor 5. The cutting device 15 moves at approximately the same speed as the cement plate conveyor 5 through a chain 15A and the like.
The cutting blade 14 is pushed down via a hydraulic or pneumatic cylinder 15B or the like fixedly attached to the cutting blade 15. The cutting blade 14 is parallel 2
It is composed of a single blade and forms a removal allowance C that is synchronized with the position of the connecting joint B between the pallets 9 placed in series on the pallet transport conveyor 10 and with a small distance from the connecting joint. The cutting is performed as follows. When the above cutting is completed, the cutting blade 14 is pulled up from the cylinder 15B, the cutting device 15 is moved backward toward the initial position (extruder side), and the above steps are repeated. The cutting position of the cement material A can be detected by attaching a dog or the like to the side of the pallet 9 and operating a limit switch or the like.

In addition, rails 16 are provided on both sides above the pallet transfer conveyor 10, and the conveyor 1 is placed on the rails 16.
A carriage-shaped removal device 19 is mounted so as to straddle the zero point. This removing device 19 removes the removal margin C between the cementitious plates A' cut as described above, and includes a vacuum cup 17 and cutting edge pressers 18 provided on both sides of the vacuum cup 17. This removing device 19 operates in a similar manner to the cutting device 15, and adsorbs the above-mentioned removal allowance C with the descending vacuum cup 17, and at the same time presses both edges of the cut cementitious board material before and after the removal allowance C. While maintaining this state, the vacuum cup 17 is subsequently raised, the presser 18 is moved forward, and the above-mentioned suction is released on the collection conveyor 20, and the removal amount C is collected by the conveyor 20. In this case, the collected removal allowance C is returned to the extruder and reused.

The rear end of pallet 9, on which the transfer of cut cementitious board material A' has been completed, is on pallet transfer conveyor 1.
When the pallet reaches the free roller 11 in front of the pallet 9, the pallet rapid conveyor 12 is rapidly fed and the pallet 9
The pallets 9 are separated from each other, and the pallets 9 are transferred to, for example, a palletizer (not shown), loaded, and sent to the next curing process.

In the above explanation of cutting and removal, the cementitious board material A was cut on the cement board transfer conveyor 5 and removed on the pallet 9 placed on the pallet transfer conveyor 10. If cutting is carried out on the pallet 9 placed on the conveyor 10, the deformation of the cementitious board material A' after cutting is minimized.
Furthermore, if the cutting length of the cement board material is large and it cannot be easily displaced on the cement board transfer conveyor 5, it is also possible to perform both the cutting and removal processes on the conveyor 5 as described above. Alternatively, the cutting and removing device can be formed integrally and provided above the conveyor 5 for transporting cement plates or above the pallets 9 placed on the conveyor 10 for transporting pallets. 2 and 3 show such a cutting/removal device, in which two cutting blades 14 are movably formed by a hydraulic or pneumatic cylinder 13 as shown in FIG. When descending (Fig. 3), the cutting blade 14 cuts the removal allowance C, narrows the gap between the lower edges of the cutting blade 14, and scoops up the removal allowance C in cooperation with the suction of the vacuum cup 17. This is how it was done.

The present invention is constructed as described above, and since the main conveyors, that is, the conveyor 5 for conveying cement plates and the conveyor 10 for transferring pallets, are sent at the same speed, the device is simple and the installation area is small, and the cement plate materials that have not yet been sufficiently hardened can be transported at the same speed. When cutting, removing the removal allowance, and transferring to the pallet, there is no excessive force, and there is space between the plates in the front and rear directions before they are transferred to the pallet, and the number of conveyors for transfer is It has many advantages, such as less deformation and meandering in the cut cementitious board material.

Further, according to the present invention, the removed cementitious board material can be recovered and reused, making it extremely economical. In addition, since the position of the connecting joint of the pallet is predicted and the removal allowance for the plate material is set by the width before and after the part corresponding to the joint, there is no need for a complicated synchronization mechanism required when the plate material is transferred from the conveyor to the pallet. becomes.

[Brief explanation of drawings]

FIG. 1 is a side view schematically showing an embodiment of the present invention, and FIGS. 2 and 3 are side views showing embodiments of the cutting/removing apparatus of the present invention. A...Cementitious board material, A'...Cut cement board material, B...Connection joint, C...Removal allowance, 1...Extruder, 5...Conveyor for transporting cement board, 6...Transfer Loading section, 9...Palette, 10...
Conveyor for pallet transfer, 14... Cutting blade, 15
...cutting device, 19...removal device.

Claims (1)

[Claims] 1. A cement plate transfer conveyor 5 which has an inclined transfer section 6 at the tip and transfers the uncured cement plate material A continuously extruded from the extruder 1 at approximately the same speed as the extrusion speed. , a pallet transfer conveyor 10 is provided below the transfer section of the cement plate transfer conveyor, and transfers the fed pallets 9 in a continuous manner and at approximately the same speed as the cement plate transfer conveyor. In this case, above the conveyor for transferring cement plates or the conveyor for transferring pallets downstream of the transfer section 6, there are two parallel blades that move intermittently at the same speed as the extrusion speed and that operate vertically and vertically. A cutting device 15 for forming a push-cut removal margin for cementitious plate material consisting of 14 moves intermittently at the same speed as the extrusion speed and can move up and down freely, and the interval between the lower edges of the cutting blades can be changed. The two parallel blades 14 formed in
A removal device 19 consisting of a vacuum cup 17 that cooperates with a blade, and two blades 14 of the above-mentioned cutting device are aligned in advance with the connecting joint B of the pallet and are operated up and down at small intervals back and forth from the connecting joint. and a synchronizing device for producing a cementitious plate material, wherein the removing device 19 removes a removal margin C between two cutting lines formed by cutting with the cutting device 15. .