JPS5923967B2 - Manufacturing method and device for cementitious board material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing extruded boards of cementitious compositions.

A cement-based composition is a composition containing cement as a main component, mixed with auxiliary components 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 The desired building material is obtained by cutting a plate-like material into a certain length.

A typical manufacturing device of this type 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 two cut surfaces are brought into contact with each other to form a cut seam, and the feed speed of the second and subsequent belt conveyors and the conveyor for conveying pallets is set slightly faster than the feed speed of the belt conveyor located upstream thereof, that is, on the extruder side. The plate-shaped bodies with cut seams separated between the conveyors and between the belt conveyor and the conveyor are transferred to a pallet on the pano-noto transfer conveyor and sent to the curing process.

In this case, the lower edges of the dice and the several sets of belt conveyors are substantially on the same plane, and the upper surface of the pallets on the pallet transfer conveyor is somewhat lower than them.

The reason why multiple sets of belt conveyors are used in the above-mentioned device is that when the separation of the cut seams is performed by the difference in the feed speed of the belt conveyors, the difference in the feed speed is gradually increased in stages to expand the forest. This is to prevent breakage, but it is difficult to control the alignment between the cut seam and the belt conveyor gap, 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, and the plate is in an unstable state during the above process.

Therefore, when a plate-shaped body that has become a unit with the cut joints completely separated is moved on several sets of belt conveyors, the leading and trailing ends of the plate-shaped body will be deformed in a meandering manner at the transfer points, resulting in a product. The yield will be poor.

On the other hand, as mentioned above, 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 a cementitious board material is cut into lengths at regular intervals on a conveyor connected to an extruder, and both cut surfaces are aligned with each other. contact to form a cut seam, and at or after the moment the cut seam of the cementitious board leaves the conveyor belt on which the cement board is placed, and before being transferred onto a pallet, the cut seam contacts the conveyor belt for a short period of time. By creating a difference in the speed of movement with respect to the pallet, adjacent cutting seams of cementitious boards are separated.

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

In the figure, a cementitious composition supplied from a pump 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 form a cementitious board material A.

Extrusion speed detection belt conveyor 4 connected to this extruder 1
will be established.

The extrusion speed detection belt conveyor 4 is formed by winding a belt around a 1-inch free roller, for example, so that the belt is rotated in contact with the cement plate material A extruded from the die 3. Using a speed signal obtained by electrically detecting the moving speed of the cement board A using a generator or a rotary encoder, the speed of the conveyor for conveying the cement board described below can be adjusted to extrude the cement board A. control so that it is approximately equal to the speed.

Connected to the extrusion speed detection belt conveyor 4, a cement plate transfer conveyor 5 (the belt conveyor is shown in the figure) is arranged so that its upper surface is flush with the upper surface of the extrusion speed detection belt conveyor 4. do.

The conveyor 5 is actively driven as described above by a motor (not shown) or the like.

Rails 13 are arranged on both sides above the conveyor 5 for transporting cement plates, and a carriage-shaped cutting device 15 is mounted on the rails 13 so as to straddle the conveyor 5.

This cutting device 15 is of a known type and may be a combination of a rank and a pinion, and while moving at approximately the same speed as the cement transfer conveyor 5 via a chino 15A etc., a hydraulic pressure fixed to the cutting device 15 is installed. Or pneumatic cylinder 15B
The cutting blade 14 is pushed down via the cutting blade 14 to cut the moving cementitious board material A at regular intervals.

When the cutting is completed, the cutting blade 14 is pulled up, the cutting device 15 is moved backward toward the initial position (extruder side), and the above steps are repeated.

In this case, the cut surfaces are not isolated but come into contact with each other and lightly adhere, forming a cut seam.

Similarly, the cutting joint position of the cement board material A can be detected by, for example, attaching a dock or the like to the side of the pallet, which will be described later, and operating a limit switch or the like using the dock.

A table lifter 7 that 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 pallet 9 is supplied onto the pallet conveyor 8 from a direction perpendicular to the conveyor 8 by lowering the table lifter 1.
is placed thereon, and then when it rises, the pallet conveyor 8 rotates and sends the pallet 9 to the first a-knot transfer conveyor 10, which is also provided below the cement transfer conveyor 5.

The tip of the first conveyor 10 is located below the tip of the conveyor 5 for conveying cement plates, and the feeding speeds of both conveyors are approximately the same.

The same part Vt 9 is cement board material A cut into lengths at regular intervals.
It is convenient to make the length slightly longer than the length '' in terms of subsequent handling.

A free roller 11 is disposed on the distal end side of the first conveyor 10 for transporting the cement board, which is located below the distal end side of the conveyor 5 for transferring the cement board.
A second conveyor 12 for transporting puffmetals is disposed through the pipe.

The second conveyor 12 normally transports the pallet 9 at approximately the same speed as the cement board material A of the cement board transport conveyor 50.

Further, a cement board transfer conveyor 6 is provided above the rear end of the second conveyor 12 for L/SO transfer.

This conveyor 6 is used to transfer the cement composition board A' cut at regular intervals on the conveyor 5 for transporting cement boards onto the balent 9 on the second conveyor for transporting pallets located below. 6 also has almost the same feeding speed as the cement plate transfer conveyor 5 at all times.

When the cementitious board material A' cut to a certain length is transferred onto the balent 9, most of the cementitious board material A' is placed on the balent 9 and only a portion (0 to about 10%) is placed on the cement board transfer conveyor 6, and at the moment when the cut seam of the cement board leaves the cement board transfer conveyor, or thereafter, for a short time while keeping both conveyors 12 and 6 at the same speed. The cement board transfer conveyor 5 rapidly feeds the cement board material A' to separate it from the cement board material A at the cutting joint.

In this case, since the inner conveyors 12 and 6 are fed at the same speed, the cut cementitious board A' will not be deformed due to separation.

The cement board material coming later will not be subjected to abnormal force during separation, and since the direction of movement is determined, it will not meander or deform.

In the above rapid feed, the rear end of the valentine 9 is the free roller 11.
This is detected by a known means.

The rear end of the pallet 9 that has completed the separating process is the free roller 1.
6, the unloading conveyor 17 is rotated at high speed and the
For example, the V runt is transferred to a pantizer (not shown), loaded, and sent to the next curing process.

Since the present invention is constructed as described above, no unreasonable force is applied when separating the cementitious boards that have not yet been sufficiently hardened after cutting and transferring them to the balent, and since the number of conveyors is small, the length can be maintained at a constant length. This method is economical because it does not cause deformation or meandering in the cut cement board material, and the installation area is small, making the device compact.

[Brief explanation of the drawing]

The figure is a side view schematically showing an embodiment of the present invention. A... Cement board material, A'... Cement board material cut to a certain length, 1... Extruder, 5... Conveyor for transferring cement board, 6... Conveyor for transferring cement board , 9... Pallet, 10... First conveyor for PANOTO transfer, 12... Second conveyor for PANOTO transfer, 15
...Cutting device.

Claims (1)

[Claims] 1. Cementitious board material continuously extruded from an extruder is transferred onto a conveyor that is connected to the extruder and is fed at approximately the same speed as the extrusion speed, and is transferred at regular intervals on the conveyor. In the method of cutting the cementitious board material into lengths, bringing both cuts into contact with each other to form a cut joint, and then transferring the cementitious board material onto a pallet that moves at approximately the same speed as the conveyor, the cementitious board material A' is By creating a difference in the moving speeds of the conveyor 5 and the pallet for a short period of time at or after the moment when the cut seam leaves the conveyor and before being transferred onto the pallet 9, the cementitious board material is A method for producing cementitious board material, characterized in that cut seams are spaced apart. 2 Cementitious board material A continuously extruded from extruder 1
a conveyor 5 for transporting a cement board that transports the cement board at approximately the same speed as the extrusion speed; a cutting device 15 that cuts the cement board at regular intervals on the conveyor for transporting the cement board; and a section below the conveyor for transporting the cement board. established in
A first pallet transfer conveyor 1 that transfers the pallet 9 fed thereto toward the lower end of the cement plate transfer conveyor at approximately the same speed as the cement plate transfer conveyor.
0, and a second pallet transfer conveyor 12 that is connected to the first pallet transfer conveyor on the tip side of the cement board transfer conveyor and transfers the pallet at approximately the same speed as the cement plate transfer conveyor. and a cement board transfer conveyor 6 which is provided above the rear end of the second pallet transfer conveyor and transfers the cement board material on the cement board transfer conveyor to the pallet on the pallet transfer second conveyor. An apparatus for manufacturing cement board material, further comprising a device for causing the second pallet transfer conveyor and the cement board transfer conveyor to move faster than the cement board transfer conveyor for a short period of time.