JPH0661738B2 - Profile extrusion method for ceramic products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method for manufacturing a modified cross-section extrusion molding useful for manufacturing ceramic products such as cement wall materials or cement floor panels, and cement blocks for civil engineering. It is about.

[Prior Art] Ceramic products made of cement have been widely used as materials for civil engineering and construction. Among them, recently, building materials, particularly wall materials, have been manufactured by an extrusion molding method as shown in Japanese Patent Publication No. 55-16050.

This method has the advantage of being able to industrially efficiently manufacture products with various cross-sectional shapes by replacing the die of an extrusion molding machine, and the extrusion molded cement plate that is a product has a dense structure. In addition to being highly resistant to freezing and thawing, it has excellent mechanical properties such as bending strength, and it is easy to work on the construction site.

However, in this extrusion molding method, generally, the mainstream is to continuously produce the same cross section in the longitudinal direction of the product as shown in FIG. A product with a shape typified by curtain walls, which is often used for building wall materials, that is, a product with a large concave shape at a certain interval in the center of the product, can be manufactured by extrusion molding method. I haven't. Therefore, these products
It is manufactured by cast molding of a cement composition and press molding using a mold that still has the required shape, and also by mechanical cutting after curing the mortar. Therefore, the work environment, work efficiency, and productivity are poor, and the manufacturing cost is high. Further, when changing the shape and size of a product according to the needs of the customer, the form must be changed uniformly for each product, so that the needs of the customer cannot be sufficiently met.

[Problems to be Solved by the Invention] The present invention has been made in view of the above points, and an object thereof is to provide a product having a large uneven shape in a central portion of the product surface such as a curtain wall at a certain constant interval. The present invention is to enable continuous and efficient production by the extrusion molding method.

[Means for Solving the Problem] The gist is (1) incorporating one or more forming dies that can be arbitrarily changed in the thickness direction of a molded product into a die for molding the outer surface of the product, and performing the forming during extrusion molding. Is changed by a moving device, etc., and in the method for producing a modified cross-section of a ceramic product that arbitrarily changes the cross-section in the product longitudinal direction, the speed of the product released from the die concerned is detected by a measuring roll, etc. An irregular cross-section of a ceramic product characterized by calculating the product discharge length of a speed signal with a computing device, etc., and changing the position of the forming die with the moving device at a position of a predetermined predetermined product discharge length. Extrusion method.

(2) In the die for molding the outer shape of the product, one or more forming dies that can be arbitrarily changed in the thickness direction of the molded product are incorporated, and the forming die is changed by a moving device or the like during extrusion molding to change the product longitudinal direction. In the method of extrusion molding irregular cross-section of ceramic products that changes the cross-section arbitrarily, the speed of the product discharged from the die is detected by a measuring roll, etc., and the raw material of the extruder to keep the speed constant. A modified cross-section extrusion molding method for ceramic products, characterized by controlling the rotational speed of a screw for pressure feeding.

Is.

[Structure and Action of the Invention] The method of the present invention will be specifically described below with reference to the accompanying drawings.

FIG. 1 (A) is a side sectional view for explaining the constitution and operation of the present invention, and FIG. 1 (B) is an XX sectional view of (A). In the figure, 1 is a discharge part of a well-known extrusion molding machine, and a screw 1 _-1 for feeding the raw material is installed in the discharge part. Reference numeral 2 denotes a raw material discharge pipe in which the discharge side end portion of the extrusion molding machine 1 is concentrically connected, and a die 3 for regulating the outer peripheral shape of the molded product is attached to the discharge portion at the other end. . A forming die 5 is incorporated inside the upper surface of the die 3 so that the forming die moving device 4 can move in the thickness direction of the product. Now, the position of the lower surface 5 _-1 of the forming die, and set to match the upper surface 3 _-1 of the base type, when extruded ceramic mortar as a raw material in the extruder, the molded article 6 The cross-sectional shape is continuously molded and discharged in a shape that substantially matches the exit side shape of the die.

Further, when the above-mentioned forming die 5 is moved by the forming die moving device 4 to the one-dot chain line position in the drawing during this molding, the ceramic mortar has a lower surface 5 _-1 of this forming die 5 and a lower surface of the die. _3-2 and is constrained to the base type sides 3 _-3, the cross-sectional shape of the molded article 6, the molded article shape 6 expressed by the one-dot chain line in the drawings' are next continuously molded release.

Therefore, the discharge speed of the molded products 6, 6'is detected by the measuring roll 7, etc., and the molded products 6, 6'are used by the arithmetic unit 8, etc.
When the forming die moving device 4 receives and controls the forming die 5 in response to the signal of the determined emitting length, the forming die 5 is controlled to move continuously to form a concave shape having an arbitrary size. Can be manufactured in. Further, the angles of the taper portion at the start and end of the depression are determined by the moving speed of the forming die 5 with respect to the discharging speed of the molded products 6, 6 '. This means that by controlling the moving speed and the position of the forming die 5 with respect to the discharging speed of the molded products 6 and 6 ', it is possible to create any shape from a linear shape to a curved shape.

However, during continuous extrusion molding, the forming die 5
Of course, the cross-sectional area of the molded product changes, and the discharge speed of the molded products 6, 6'changes. Therefore, the dimensional accuracy is adversely affected, but in order to solve these problems, the present invention detects the discharging speed of the molded products 6 and 6'by the measuring roll 7 so that the speed is always constant. variable control rotation speed of the raw material feeding screw 1 _-1 of the extruder are carried.

Further, as shown in FIG. 2, a plurality of forming dies are incorporated in the width direction of the die, and the position and speed of the forming dies can be controlled according to the discharge length of the molded product during extrusion molding. The complicated cross-section of a molded product can be manufactured by continuous extrusion molding, which is very advantageous industrially.

Example Next, the continuous extrusion molding method of the curtain wall having the shape shown in FIG. 4 according to the present invention will be specifically described based on the embodiment example of FIG. The symbols and the names of the devices are the same as those described above, so some of them will be briefly described.

Reference numeral 1 is a discharge part of an extrusion molding machine, and 10 is a composite mold constituted by the present invention, in which three forming dies are set. 5a is a right side concave forming die, 5b is a left side concave forming die, and 5c is a central vertical rib forming die. These forming dies are 4a, 4b, 4c forming die moving device,
Each of them has a structure capable of moving freely in the thickness direction of the molded product 6. A measuring roll 7 is in contact with the lower surface of the molded product 6 to detect the discharge speed of the molded product, and sends a speed signal to the arithmetic unit 8 every moment. In this arithmetic unit, this speed signal is calculated to the ejection length of the molded product and sent to the forming die control unit 9 and in this forming die control unit, the molded product has a predetermined shape so as to have a predetermined shape.
Move each forming die moving device of b, 4c, 5a, 5b,
5c controls the position and speed of each forming die, the release rate of the molded article is controlling the rotational speed of the raw material feeding screw 1 _-1 to be constant. Now, as shown in the section AA in FIG. 3, the lower surface 5a of each forming die is shown.
_-1 , 5b _-1 , 5c _-1 are set so as to match the upper surface 3 _-1 of the die, and a ceramic composition mortar, which is a cement composition, is extruded by an extrusion molding machine to obtain a cross section of the molded product 6. The shape 6 _-1 is extruded in conformity with the exit side shape of the die 3. Molded product 6
After being discharged for a certain length, each moving device of 4a, 4b, 4c moves at the same time by the command from the forming die moving device control device of 9 and each of the forming dies of 5a, 5b, 5c starts descending. Then, the central part of the surface of the molded product 6 is gradually recessed.
In the process, the discharge speed of the molded product starts to increase, but the rotation speed of the raw material pressure feed screw 1 _-1 is controlled to be decelerated so that the discharge speed becomes constant. In this state, when each forming die of 5a, 5b, 5c descends to a predetermined position,
Only the center forming die 5c is stopped, and the other 5a, 5
The forming die of b continues to descend as it is, and while forming a vertical rib at the center of the molded product 6 with the forming die 5c, it is further recessed to a specified position and then stopped. The cross-sectional shape of the extrusion-molded product 6 in this state is the cross-section B of FIG.
-B. After extrusion molding to the length of the molded product determined in this state, the forming die moving devices of 4a and 4b are moved in unison by the command from the forming die control device of 9, and the lower surfaces of the forming dies of 5a and 5b are Raise it to the same position as the bottom of the 5c forming die and stop. During this increase, the molded article release rate so begins to decelerate, thereby accelerated the rotational speed of the raw material feeding screw 1 _-1. The cross-sectional shape of the extrusion-molded product 6 in this state is the intermediate lateral rib shape of cross-section C-C in FIG. After forming the intermediate horizontal rib shape to the length in this state, by depressing the raw material feeding screw and lowering the forming dies of 5a and 5b to the original position, the shape is the same as the cross section BB again. Is molded. In this state, cross section B
-After extruding the B shape to the defined length of the molded product,
Again, while increasing the speed of the raw material feed screw, the forming dies of 5a and 5b are raised to gradually reduce the concave shape. Also, when the lower surface of the forming dies of 5a and 5b rises to the same position as the lower surface of the forming dies of 5c,
The forming dies of 5c are also raised at the same time, and the first position, that is, the lower surface 5a _-1 , 5b _-1 , of each forming die is
Stop 5c _-1 at a position aligned with the upper surface 3 _-1 of the die. In this state, the shape of the molded product becomes the cross-section AA shape in FIG. Therefore, by repeatedly executing these series of operations, the curtain wall prototype shown in FIG. 4 can be continuously molded with good dimensional accuracy by the extrusion molding method.

The curtain wall product of FIG. 4 is completed by cutting the longitudinal center portion of the cross section AA of the molded product manufactured in this way with the cutting device 11 and curing and curing with the curing device.

The above is one embodiment of the present invention, but the die, the shape of the forming die, the number of forming dies, the mounting position of the forming die, the moving speed of the forming die, the position, etc. can be freely combined. By combining them, even products with a considerably complicated cross-section in the longitudinal direction as shown in FIG. 5 or 6,
Although it can be manufactured continuously and efficiently by an extrusion molding method, the basic function of the present invention is adopted and is included in the present invention.

[Effects of the Invention] As described above, according to the present invention, not only curtain-like products such as curtain walls having a large concave shape at a constant interval in the central portion of the product, but also various longitudinal cross-sections can be obtained. Ceramic products with complicated shapes can be manufactured extremely easily and continuously by extrusion molding method, and the shape and size can be easily adjusted according to the demands of customers, and the manufacturing cost is also extremely low. It is possible to exert a remarkable industrial effect such as being manufactured by.

[Brief description of drawings]

FIG. 1 (A) is a side sectional view for explaining the structure and operation of the present invention, FIG. 1 (B) is a sectional view taken along line XX of FIG. 1 (A), and FIG. FIG. 3 (A) is a perspective view showing an embodiment of the present invention, FIG. 3 (B) is a sectional view taken along the line A-A in FIG. 3 (A), and FIG. Section, (D) is a longitudinal sectional view showing the same CC section, FIGS. 4 to 6 are perspective views showing examples of curtain wall shapes that can be produced by the present invention, and FIG. 7 is a conventional extrusion molding method. FIG. 1 ... Discharge part of extrusion molding machine 2 ... Discharge pipe 3 ... Die die 4 ... Forming die moving device 5 ... Forming die 6,6 '... Molded product 7 ... Measuring roll 8 ... Computing device 9 …… Forming die control device 10 …… Composite mold of the present invention 11 …… Cutting device 3 _-1 …… Upper surface of the die 3 ₋₂ …… Lower surface of the die 3 _-3 …… Both sides of the die 5 _-1 …… Bottom surface of forming dies 4a, 4b, 4c …… Respective forming die moving device 5a, 5b, 5c …… Respective forming dies 5a _-1 , 5, b _-1 , 5, c _-1 ...... 5a, 5b, 5c Underside of forming die

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuyoshi Miura, Nobuyoshi Miura, No. 12 Nakamachi, Muroran, Hokkaido Nippon Steel Co., Ltd. Inside the Muroran Works (72) Yoshio Nakazawa 2-6-3 Otemachi, Chiyoda-ku, Tokyo Shin Nippon Steel Co., Ltd. In-house (72) Inventor Takashi Tsushima 2-6-3 Otemachi, Chiyoda-ku, Tokyo New Nippon Steel Co., Ltd. In-house (72) Inventor Kanji Yamada 1618 Ida, Nakahara-ku, Kawasaki-shi, Kanagawa Shin-Nihon Steel Engineering Co., Ltd. 1st Technical Research Laboratory (72) Inventor Kozo Toyama 2-191-1 Tobita Supply, Chofu City, Tokyo Kashima Construction Co., Ltd. Technical Research Laboratory (72) Inventor Yoshikazu Takei 2-19 Tobita Supply, Chofu City, Tokyo No. 1 Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Tatsuo Suenaga 2-191-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) ) Inventor Hiroaki Nakagawa 2-191-1 Tobita-cho, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (56) Reference JP-A-62-99111 (JP, A) JP-A-62-33604 (JP, A)

Claims (2)

[Claims] 1. A die for molding the outer surface of a product is equipped with one or more forming dies that can be arbitrarily varied in the thickness direction of the molded product, and the forming is changed by a moving device or the like during extrusion molding to change the product longitudinal direction. In the method of extrusion molding with irregular cross-section of ceramic products that arbitrarily changes the cross-section of the product, the speed of the product released from the die concerned is detected with a measuring roll, etc. Is calculated, and at the position of the predetermined product release length determined in advance,
A modified cross-section extrusion molding method for ceramic products, which comprises changing the position of a forming die by the moving device. 2. A mold for molding the outer shape of a product is equipped with one or more forming dies which can be arbitrarily varied in the thickness direction of the molded product, and the forming dies are changed by a moving device or the like during the extrusion molding to change the product length. In the method of extrusion molding irregular cross-section of ceramic products that changes the cross-section in any direction, the extrusion molding machine detects the speed of the product discharged from the die with a measuring roll, etc., and keeps the speed constant. A method for extrusion-molding a modified cross section of a ceramic product, which comprises controlling the number of rotations of the screw for feeding the raw material.