JPS597565B2 - Surface patterning device for extruded materials - Google Patents

Description

[Detailed description of the invention] The present invention relates to a surface patterning device for inorganic extruded materials.

In conventional extrusion molding of cement boards, the extrusion pressure is increased considerably to make the molded product denser, and the water content of the cement admixture relative to the cement is significantly reduced in order to increase the strength of the molded product.

However, increasing the extrusion pressure increases the dehydration phenomenon during extrusion, resulting in a decrease in the strength of the final product.

On the other hand, if the water content of the cement mixture is increased and the extrusion pressure is lowered, the above dehydration phenomenon can be resolved, but the molded product immediately after extrusion becomes too soft, and the extruded molded product may break during drawing. There were disadvantages such as:

Therefore, when patterning is applied to a molded product immediately after extrusion using a roll with a surface pattern, since the extrusion molded product is too soft, it is impossible to increase the pressure applied by the roll, and therefore the inorganic plate surface It had the disadvantage that it was difficult to create beautiful patterns on it.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus which eliminates the above-mentioned drawbacks and is capable of forming beautiful patterns on the surface of an inorganic plate.

For the above purpose, the configuration of the present invention is as follows.

On the downstream side of the extrusion path of the die in the extrusion direction, a sheet guide roll is rotatably provided in a portion of the die upper body facing the extrusion end surface.

The die is disposed inside a rectangular cross-section cylinder formed of an upper body, a lower body, and a side body, and is arranged inside the cylinder to extrude the hollow inorganic composition in a horizontal direction. It consists of a hollow pin for forming the part.

Surrounded by these, a variable cross section introduction path having a cross section that gradually decreases from upstream to downstream in the extrusion direction and a constant cross section extrusion path continuous to the downstream side thereof are configured.

Moreover, the extrusion end of the upper body is set back by a length l to the upstream side in the extrusion direction than the extrusion end of the lower body, and the end surface of the upper body is an inclined surface facing upward in the extrusion direction.

Further, the extrusion end surface of the hollow pin is flush with the end surface of the lower body, and a land length L of a portion of the hollow pin corresponding to the constant cross-section extrusion path is larger than the length l. .

Furthermore, the sheet guide roll has a center line of rotation parallel to the surface of the extruded material and perpendicular to the extrusion direction, and is connected to the end surface of the die upper body immediately above the extrusion end surface of the die lower body or on the upstream side in the extrusion direction. It is located between.

An embodiment of the present invention will be described below based on the drawings.
Prior to that, the entire patterning method will be briefly explained.

In FIG. 1, 1 is an extruder, and 2 is a die of the extruder.

A sheet introduction port 2a is provided at the upper part of the die 2, and a freely rotatable sheet guide roll 3 is provided in the sheet introduction port 2a.
0 is set.

3 is a belt conveyor, 4 is a sheet take-up roll, 5 is a sheet outlet roll, and 6 is a sheet peeling roll.

To carry out the extrusion patterning operation, a sheet S having an uneven pattern a on one side is inserted into the lower surface of the guide roll 30 through the sheet introduction port 2a of the die 2, as shown in FIG.

In this case, the sheet S is pressed in such that its uneven pattern surface a faces the surface of the extruded material.

After inserting the sheet S into the die 1, the water-containing cement mixture B is extruded into a plate shape from the die 2 of the extruder 1, and the plate-shaped molded product P is received by the belt conveyor 3, We will transport it.

As the cement mixture is extruded, the sheet S is fed out from the sheet feeding hole 5, and is bitten into the die 2 while being pressurized by the guide roll 30.

Inside the die 2, the cement mixture B and the sheet S are moved together, and during this time the uneven pattern surface a of the sheet S is
is pressed onto the cement mixture B, and from the die 2, a plate-shaped body P of the cement mixture to which the sheet S is attached is extruded.

The cement molded body M attached to the sheet on the belt conveyor 3 is
When passing through the sheet peeling roll 6, the sheet S on the surface
is pulled by the sheet winding roll 4 and peeled off from the molded body M.

After the sheet has been peeled off, the surface of the cement molded body P has an uneven pattern that is the reverse of the uneven pattern of the sheet.

Here, as shown in the second diagram, the die 2 has an upper main body 21,
It consists of a rectangular cross-section cylindrical body formed by a lower body 22 and a side body (not shown), and a hollow pin 23 disposed inside the cylindrical body to form a hollow part of the composition. A variable cross section introduction path 24 is surrounded by a variable cross section introduction path 24 having a cross section that gradually decreases from upstream to downstream in the extrusion direction, and a constant cross section extrusion path 25 continuous to the downstream side thereof is configured.

The hollow pin 23 also serves as a pressure receiver for the guide roll 30.

Therefore, the extruded end of the upper body 21 is connected to the lower body 2.
The end surface 21a thereof is an inclined surface facing upward in the extrusion direction, and serves as a guide surface for the jet S.

Here, if the distance l is shorter than the land length L of the hollow pin 23, backflow of the extruded material can be reliably prevented.

A sheet guide roll 30 is supported between the side bodies at a portion facing the extrusion end surface of the upper body 21 and is freely rotatable.

Therefore, the installation height H of the roll 30 is such that the lower end of the roll circumferential surface is above the virtual extension surface of the upper surface of the die extrusion path 25 by an amount equivalent to the thickness of the sheet S or less than that. It is determined that

Further, the installation position of the roll 30 in the horizontal extrusion direction is determined such that the rotation center line of the roll 30 is within the virtual vertical extension of the extrusion end surface of the lower body 22, or on the upstream side in the extrusion direction.

In this state, a gap is left between the circumferential surface of the roll 30 and the guide surface 21a of the upper body of the die, through which the sheet S can pass.

Next, another embodiment of the seat movable guide device will be described based on FIG. 3.

In this embodiment, two first and second guide rolls 41.4
2 are arranged in parallel with a gap in the extrusion direction.

A regulating plate 43 that prevents the sheet from floating up between both rolls is provided so as to be movable up and down.

Note that 44 is a cover that covers the rolls 41 and 42 from above and on which the regulation plate 43 is installed.

The installation height of the roll 4L42 is the same as in the previous embodiment.

Further, the position of the first roll 41 in the extrusion direction is arranged such that there is a gap between it and the upper main body guide surface 21a through which the sheet S passes, and the position of the second roll 42 in the extrusion direction is arranged at the lower part as described above. It is located within the virtual vertical extension plane of the extrusion end surface of the main body 22 or upstream in the extrusion direction.

As described above, in the present invention, the die is composed of a rectangular cross-section cylinder and a hollow pin inside the cylinder, and the extrusion end of the upper main body of the cylinder is retracted by a length l toward the upstream side in the extrusion direction, and upward in the extrusion direction. A guide roll for the patterned sheet is rotatably provided on this inclined surface.

Therefore, the patterned sheet can be easily and reliably inserted into the cement mixture, and the uneven pattern of the sheet will not get caught or caught in the upper body of the die, so there will be no harmful elongation or deformation of the sheet. The patterned sheet has a long service life and is useful for creating beautiful patterns on the surface of inorganic compositions.

Moreover, the mounting position of the guide roll can be optimally set depending on the thickness of the sheet and the uneven pattern, and the sheet can be easily replaced by removing the guide roll.

Moreover, the extrusion end surface of the hollow pin is flush with the end surface of the lower body, and the land length of the portion of the hollow pin corresponding to the constant cross-section extrusion path is longer than the length l. , the backflow of the extruded material within the die was reliably prevented.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an extrusion molding mode showing an embodiment of the present invention;
FIG. 2 is an enlarged vertical cross-sectional view of a main part, and FIG. 3 is an enlarged vertical cross-sectional view of another embodiment. 1...Extruder, 2...Dice, 21.
... Upper body, 21a ... Inclined surface, 22
...Lower body, 2a...Seat inlet, S...Seat, a...Irregular pattern, P
...Extruded plate-shaped body.

Claims (1)

[Claims] 1. On the downstream side of the extrusion path of the die in the extrusion direction, a sheet guide roll is rotatably provided at a portion of the die upper body facing the extrusion end surface, and the die is configured to extrude the hollow inorganic composition in the horizontal direction. It consists of a rectangular cross-section cylindrical body formed by an upper body, a lower body, and a side body, and a hollow pin arranged inside the cylindrical body to form a hollow part of the composition, and is surrounded by these. A variable cross-section introduction path having a cross section that gradually decreases from upstream to downstream in the extrusion direction, and a constant cross-section extrusion path continuous to the downstream side thereof are configured, and the extrusion end of the upper body is wider than the extrusion end of the lower body in the extrusion direction. The upper body end face is an inclined face facing upward in the extrusion direction, and the extrusion end face of the hollow pin is flush with the lower body end face, and The land length L of the portion corresponding to the constant cross-section extrusion path is longer than the length l, and the sheet guide roll has a rotation center line parallel to the surface of the extruded material and perpendicular to the extrusion direction, and 1. A surface patterning device for an inorganic extruded material, characterized in that the device is disposed so as to be located directly above the extrusion end surface of the die lower body or on the upstream side thereof in the extrusion direction and between the extrusion end surface of the die upper body.