JPS5858205B2 - Surface patterning device for inorganic extruded materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface texturing device for mineral boards, such as cement boards.

In conventional extrusion molding of cement boards, the extrusion pressure is increased to a certain extent to make the molded product high in density, and the moisture content of the cement mixture relative to the cement is considerably reduced in order to increase the strength of the molded product.

However, increasing the extrusion pressure in this way 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, the pressure applied by the roll cannot be increased because the extrusion molded product is too soft. The drawback was that it was difficult to create beautiful patterns on the surface.

An object of the present invention is to provide an extrusion molding apparatus capable of forming beautiful patterns on the surface of an inorganic plate while eliminating the above-mentioned drawbacks.

In view of the above objects, the configuration of the present invention is such that, on the downstream side in the extrusion direction of the extrusion path of the die, a sheet guide roll is provided in a portion of the upper body of the die opposite to the extrusion end surface, and the axis of rotation thereof is parallel to the surface of the extruded material. , the die is rotatably provided at right angles to the extrusion direction, and the die has a rectangular cross-section cylindrical body formed of an upper body, a lower body, and a side body so as to extrude the inorganic composition in a horizontal direction; The extrusion end of the upper body has a length l toward 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, and the sheet guide roll 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. and the roll is placed in contact with the sheet having an uneven pattern in a state where the uneven pattern surface is pressed against the surface of the extruded material,
Additionally, the sheet is a patterning device adapted to be guided to a peel roll that peels it off from the extrusion surface.

An embodiment of the present invention will be described below based on the drawings.

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 delivery 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 inserted so that its uneven pattern surface a faces the surface of the extruded material.

After inserting the sheet S into the die 2, 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 a belt conveyor 3 and transferred on the conveyor 3. To go.

The sheet S is fed out from a sheet feeding roll 5 as the cement mixture is extruded, and is bitten into the die 2 while being pressurized by a 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 sheet-attached cement molded body M 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, the die 2 has an upper body 21 as shown in the second figure.
．． It consists of a lower body 22, a side body (not shown), and a hollow pin 23, and is surrounded by a variable cross-section introduction path 24 and a constant cross-section extrusion path 25 in order from upstream to downstream in the extrusion direction.

Therefore, the extruded end of the upper body 21 is connected to the lower body 2.
It is set back by a distance l to the upstream side in the extrusion direction from the extrusion end of No. 2, and its end surface 21a is an inclined surface facing upward in the extrusion direction, and serves as a guide surface for the sheet S.

Here, if the distance l is shorter than the land length 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 higher than the virtual extension surface of the upper surface of the die extrusion path 25 by an amount equivalent to or less than the thickness of the sheet S. determined.

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 main body 22 or upstream of it 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 die upper body, 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 parallel to each other with gaps 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 the roll, 41.42 is covered from above,
Moreover, it is a cover for installing the regulation plate 43.

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

Further, the position in the extrusion direction of the 10th rule 41 is arranged such that there is a gap between it and the upper body guide surface 21a through which the sheet S passes, and the position in the extrusion direction of the 20th rule 42 is located 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, according to the inorganic plate extrusion molding apparatus according to the present invention, the pattern is attached to the surface of the extruded plate-like material such as cement by inserting the sheet having the uneven pattern into the die. There is no problem of roll surface pressure as in the case of applying a pattern with an attached roll, and therefore cement mixtures with high water content and low extrusion pressure can be used.

Even if the extrudate becomes extremely flexible due to the large moisture content of the cement, the extrudate is reinforced by the attachment of the sheet, so breakage of the extrudate can be reliably avoided.

The die has a cylinder with a rectangular cross section, 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
It is an inclined surface facing upward in the extrusion direction.

A guide roll for the patterned sheet is rotatably provided in this portion.

Therefore, the composition is molded by rolls while being surrounded by the lower body and side bodies of the die, and the molded product will not be deformed or wrinkled.

In addition, the cement mixture/\ on the patterned sheet can be inserted and attached easily and reliably, and the uneven pattern on the sheet will not get caught or stuck on the upper body of the die, preventing harmful elongation or deformation of the sheet. In addition, 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 roll.

In addition, since a sheet guide roll is provided in the part facing the extrusion end surface of the upper body of the die and presses the patterned sheet, the extrusion resistance due to the sheet is small, and the sheet is accurately introduced and beautifully coated on the surface of the extruded plate. It was decided that a pattern would be added.

Furthermore, with the apparatus of the present invention, patterning can be carried out continuously at the same time as extrusion molding of the product, making it possible to mass-produce the product in a short period of time.

[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 the main part, and FIG. 3 is a vertical cross-sectional view of another embodiment. 1...Extruder, 2...Dice, 2a.
... Seat introduction port, S ... Seat, a.
...Uneven pattern, P...Extruded plate-shaped body, 30
...Sheet guide roll.

Claims (1)

[Claims] 1. On the downstream side of the extrusion path of the die in the extrusion direction, a sheet guide roll is installed in a portion of the upper body of the die opposite to the extrusion end surface such that the sheet guide roll is rotatable so that its axis of rotation is parallel to the surface of the extruded material and perpendicular to the extrusion direction. provided, the die has a rectangular cross-section cylinder formed of an upper body, a lower body, and a side body so as to extrude the inorganic composition in a horizontal direction;
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, and the sheet guide roll is The roll is disposed so as to be located directly above the extrusion end surface of the die lower body or on the upstream side in the extrusion direction and between the extrusion end surface of the die upper body, and the roll has a strip-shaped sheet having an uneven pattern that extends the uneven pattern surface onto the extruded material surface. a sheet feeding roll that is in contact with the extruded material surface in a pressed state and is provided above the guide roll on the upstream side in the extrusion direction; and a sheet peeling roll that contacts the surface of the extruded material via the sheet on the downstream side of the guide roll in the extrusion direction. and a sheet take-up roll provided above the sheet peeling roll, and the belt-shaped sheet is stretched between the sheet peeling roll and a sheet winding roll provided above the sheet peeling roll.