JPH04166302A - Profile section extrusion molding of ceramic product - Google Patents

Abstract

PURPOSE:To enable the product with uneven shape to be continuously and effectively produced by a method in which the forming die optionally variable in the thickness direction of a molded object is incorporated into a mouthpiece mold, and the die is kept variably in extraction molding, and then the transverse cross section in the longitudinal direction of the product is optionally changed. CONSTITUTION:When a forming die 5 is moved by a forming die-moving device 4 in molding, ceramic mortar is constrained by the lower surface 5-1 of the forming die 5, the lower surface 3-2 of a mouthpiece mold and both sides 3-2 of the mouthpiece mold. The sectional shape of a molded object 6 becomes the shape 6' of the molded object, and is continuously molded and discharged. Accordingly, the discharging speed of the molded object 6, 6' is detected by a measuring roll 7, etc., and is given in terms of discharging length by using a calculation device 8, etc., and while the signal of defined discharging length is received, the recessed shape of optional dimension may be continuously produced in extraction molding by moving and controlling the forming die 5 with a forming die-moving device 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a manufacturing method for irregular cross-section extrusion molding, which is useful for manufacturing ceramic products such as cement wall materials, cement floor panels, and cement blocks for civil engineering. It is related to.

[Prior Art] Many ceramic products containing cement have been used as civil engineering and construction materials. Recently, building materials, especially wall materials, have been manufactured by extrusion molding methods as disclosed in Japanese Patent Publication No. 55-16050.

This method has the advantage of being able to industrially efficiently manufacture products with a wide variety of cross-sectional shapes by changing the die of the extruder, and the product, the extruded cement board, has a dense structure. In addition to being resistant to freezing and thawing, it has excellent mechanical performance such as bending strength, and is easy to construct at construction sites, so it is highly evaluated by customers.

However, in general, this extrusion molding method is mainly used to continuously manufacture the same cross section in the longitudinal direction of the product as shown in Fig. 7. Products with a shape typical of curtain walls, which are often used as wall materials in buildings, have large concave shapes at regular intervals in the center of the product, but it is possible to manufacture them using the extrusion molding method. I haven't. Accordingly, these products are
In addition to the old methods, which still use molds with the required shape, such as pour molding or press molding of cement compositions, they are also manufactured by mechanical cutting after hardening the mortar. As a result, the working environment is poor, work efficiency and productivity are poor, and manufacturing costs are high. Furthermore, when changing the shape and dimensions of a product in accordance with customer needs, it is necessary to change the formwork uniformly for each product, which does not satisfactorily meet the customer's needs.

[Problems to be Solved by the Invention] The present invention has been made in view of the above points, and its purpose is to provide a product having large irregularities at a certain interval in the center of the product surface, such as a curtain wall. The object is to enable continuous and efficient production by extrusion molding.

[Means for solving the problem] The gist is as follows: 1. One or more forming dies that can be arbitrarily varied in the thickness direction of the molded product are incorporated into the mouth mold that forms the external shape of the product, and the forming dies are used during extrusion molding. 1. A method for extrusion molding ceramic products with irregular cross-sections, characterized in that the longitudinal cross-section of the product can be arbitrarily changed by varying the cross-section with a moving device or the like.

2. A moving device etc. is used to mold the external shape of the product.
A forming die that can be adjusted arbitrarily in the thickness direction of the molded product is installed, and a measuring roll or the like detects the speed of the product ejected from the die, and the speed signal is used to calculate the product ejection length using a calculation device, etc. , wherein the position of the forming die is varied by the moving device at a predetermined position of a predetermined product discharge length, and the cross section in the longitudinal direction of the product is arbitrarily changed during extrusion molding. A method for extruding ceramic products with irregular cross-sections.

3. A forming die that can be arbitrarily varied in the thickness direction of the molded product using a moving device is incorporated into the die that forms the external shape of the product, and the speed of the extrusion molded product that occurs when the position of the forming die is varied using the moving device is controlled. 1. The method for extrusion molding ceramic products with irregular cross-sections as described in 1 above, characterized in that the rotational speed of a screw for pumping the raw material of an extruder is controlled so that the speed is detected by a measuring roll or the like and the speed is constant.

It is.

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

FIG. 1(A) is a side sectional view illustrating the structure and operation of the present invention, and FIG. 1(B) is a sectional view taken along line XX in FIG. 1(A). In the figure, 1 is a discharge section of a well-known extrusion molding machine, and the inside thereof is equipped with a screw 1-1 for pumping raw material. Reference numeral 2 denotes a raw material discharge pipe connected centrally to the discharge side end of the extrusion molding machine 1, and a die 3 for regulating the outer peripheral shape of the molded product is attached to the discharge section at the other end. . A forming die 5 is installed inside the upper surface of the die die 3, and has a structure in which it can be moved in the thickness direction of the product by a forming die moving device 4.

Now, when the position of the lower surface 5-1 of this forming die is set to match the upper surface 3-8 of the mouth mold, and the raw material ceramic mortar is extruded with an extrusion molding machine,
The molded product 6 is continuously molded and ejected with a cross-sectional shape that substantially matches the exit shape of the die.

Furthermore, when the forming die 5 is moved to the position shown by the dashed-dotted line in the drawing by the forming die moving device 4 during this molding, the ceramic mortar will move between the lower surface 5-1 of the forming die 5 and the lower surface of the base mold. 3-2 and both sides of the mouth mold 3-3, the cross-sectional shape of the molded product 6 becomes 6° as indicated by the dashed line in the drawing, and is continuously molded and ejected.

Therefore, the release speed of the molded product at 6.6° is detected by the measuring roll 7, etc., and the molded product at 6.6° is detected using the computing device 8, etc.
By receiving the signal of the ejection length determined by converting the ejection length into the ejection length, the forming die moving device 4 controls the movement of the forming die 5 to form a concave shape of an arbitrary size.
It can be manufactured continuously by extrusion molding.

Also, the angle of the part of the taper at the start and end of the recess is determined by molded product 6.
It is determined by the moving speed of the forming die 5 relative to the discharge speed of the forming die 6'. This means that by controlling the moving speed and position of the forming die 5 with respect to the ejection speed of the molded product at 6.6°, it is possible to create any shape, from a straight shape to a curved shape.

However, during continuous extrusion molding, the forming die 5
When the molded article 6.6' is moved, the cross-sectional area of the molded article changes as a matter of course, and the release rate of the molded article 6.6' changes. This results in an adverse effect on dimensional accuracy, but in order to solve these problems, the present invention detects the ejection speed of the molded product 6.6゛ with the measuring roll 7, and makes sure that the speed is always constant. The rotational speed of the raw material feed screw 1-1 of the extrusion molding machine is controlled variably.

Furthermore, as shown in Fig. 2, if a plurality of forming dies are installed in the width direction of the die, and the position and speed of the forming dies are controlled individually according to the length of the molded product released during extrusion molding. , it becomes possible to manufacture molded articles with complex cross sections by continuous extrusion molding, which is very advantageous industrially.

[Example] Next, a continuous extrusion molding method for a curtain wall having the shape shown in FIG. 4 using the present invention will be specifically explained based on the embodiment example shown in FIG. 3. Some of the symbols and device names are the same as those described above, so some of them will be briefly explained.

Reference numeral 1 is a discharge section of an extrusion molding machine, and reference numeral 10 is a composite mold constructed according to the present invention, in which three sets of forming dies are set. 5a is the right side concave forming layer forming die, 5b
5c is a forming die for forming the left concave layer, and 5c is a forming die for forming the vertical ribs in the center. These forming dies are structured so that they can each be moved arbitrarily in the thickness direction of the molded product 6 by forming die moving devices 4a, 4b, and 4c. 7 is a measuring roll that comes into contact with the lower surface of the molded product 6, detects the release speed of the molded product, and sends a speed signal to the calculation device 8 every moment. This calculation device calculates this speed signal to the ejection length of the molded product and sends it to the forming die control device 9. The forming die control device 4a, 4b, Move each forming die moving device 4c to control the position and speed of each forming die 5a, 5b, 5c, and control the rotation speed of the raw material pumping screw 1-1 so that the discharge speed of the molded product is constant. are doing. Now, cross section A in Figure 3
-The lower surface 5a-+ of each forming die as shown in A
, 5b-++ 5cm+ are set to match the upper surface 3-1 of the base mold, and the ceramic mortar, which is a cement composition, is pressed with an extruder, and the cross-sectional shape 6-0 of the molded product 6 is formed. is extruded to match the shape of the exit side of the die 3. After the molded product 6 has been released for a certain length, the forming die moving device controller 9 sends a command from the forming die moving device controller 9.
Each moving device a, 4b, 4c moves in unison, 5a,
The forming dies 5b and 5c begin to descend, gradually recessing the center of the surface of the molded product 6. During this process, the discharge speed of the molded product begins to increase, but the rotational speed of the raw material feeding screw 1-1 is controlled to slow down so that the discharge speed remains constant. In this state 5a, 5b, 5c
When each of the forming dies has descended to a predetermined position, only the central forming die 5C is stopped, the other forming dies 5a and 5b continue to descend, and the forming die 5C forms the central part of the molded product 6. While forming vertical ribs, it is further depressed to a specified position and then stopped. The cross-sectional shape of the extrusion molded product 6 in this state becomes the cross-section BB in the figure ¥S4. After the molded product is extruded to a predetermined length in this state, the forming die moving devices 4a and 4b are moved simultaneously in response to a command from the forming die control device 9, and step 5a.

It is raised until the lower surface of the forming die 5b is at the same position as the lower surface of the forming die 5c, and then stopped. During this rise, the molded product discharge speed begins to slow down, so the rotational speed of the raw material pressure feeding screw L is increased. The cross-sectional shape of the extrusion molded product 6 in this state becomes an intermediate horizontal rib shape as shown in the cross section CC in FIG. After forming the intermediate horizontal rib shape to a certain length in this state, the forming dies 5a and 5b are lowered to their original positions while decelerating the raw material feeding screw to form the cross section B-
The same shape as B is molded. In this state, after extruding the cross section B-B shape to the specified length of the molded product,
While increasing the speed of the raw material feeding screw, the forming dies 5a and 5b are raised to gradually reduce the concave shape. Also, the bottom surfaces of the forming dies 5a and 5b are
When the 5C forming die rises to a position equal to the bottom surface, the 5C forming die also rises at the same time.
Initial position, i.e. the bottom surface 5 of each forming die
a,, 5b-,.

5, stop at a position that matches the upper surface 3-1 of the base mold. In this state, the shape of the molded product is cross section A-A in Figure 4.
It becomes the shape. Therefore, by repeating these series of operations, the curtain wall prototype shown in Figure 'fS4 can be continuously molded with high dimensional accuracy by extrusion molding.

The thus produced molded product is cut at the longitudinal center of cross section A-A by a cutting device 11 and cured by a curing device to complete the curtain wall product shown in FIG. 4.

The above is one embodiment of the present invention, but in addition to this, the mouth mold, the shape of the forming die, the number of built-in forming dies, the mounting position of the forming die, and the moving speed and position of the forming die can be freely changed. By combining these, even products with fairly complex longitudinal cross-sections, such as those shown in Figures 5 or 6, can be manufactured continuously and efficiently using the extrusion molding method. It adopts the basic function of the invention and is included in the present invention.

[Effects of the Invention] As described above, the present invention can be used not only for ceramic products having large concave shapes at regular intervals in the center of the product, such as curtain walls, but also for various types of products with longitudinal cross sections. Ceramic products with complex shapes can be manufactured extremely easily and continuously using extrusion molding. Furthermore, it is also possible to easily produce single-dimensional shapes according to the customer's wishes, and the manufacturing cost is extremely low. It can be produced with significant industrial effects.

[Brief explanation of the drawing]

Figure 1 (A) is a side sectional view explaining the structure and operation of the present invention, Figure 1 (B) is a cross-sectional view taken along the line x-X of Figure 1 (A), and Figure 2 is a cross-sectional view of the structure in which multiple forming dies are incorporated. 3(A) is a perspective view showing an embodiment of the present invention, CB) is a cross-sectional view taken along the line AA in FIG. 3(A), and (C/) is the same <B- B cross section, (0) is a longitudinal cross-sectional view showing the same <C-C cross section, FIGS. 4 to 6 are perspective views showing an example of the curtain wall shape that can be manufactured by the present invention, and FIG. 7 is a conventional extrusion It is a perspective view showing a molding method. 1... Discharge part of extrusion molding machine 2... Discharge pipe 3... Mouth mold 4... Forming die moving device 5... Forming die 6.6'... Molded product 7... Measure Ring roll 8...Arithmetic device 9...Forming die control device 10...Composite mold 11 of the present invention...Cutting device 3-1...Top surface of the die die 3-2...Beat Lower surface of mold 3-3...Both sides of die die 5-1...Lower surface of forming die 4a, 4b, 4
c...Respective forming die moving devices 5a, 5b, 5c...Respective forming dies 5a, 5b, , 5cm+=-5a, 5b, 5c Bottom surface of forming die Fig. 7 Fig. 3(B) FIG. 3(D) 3 Base mold 3-10 Top surface 4a, 4b of mold 3, Ac forming die 5 Forming die 5a, 5b, 5c Forming die 55a-,
, 5b-, 5cm, : 5a, 5b, 5c = 6
Molded product Figure 3 (C) Bottom surface of sformink die

Claims (1)

[Scope of Claims] 1. One or more forming dies that can be arbitrarily varied in the thickness direction of the molded product are incorporated into a die for forming the external shape of the product, and the forming dies are varied using a moving device or the like during extrusion molding, A method for extruding ceramic products into irregular cross sections, characterized by arbitrarily changing the cross section in the longitudinal direction of the product. 2. Using a moving device, etc., move the die to form the external shape of the product.
A forming die that can be adjusted arbitrarily in the thickness direction of the molded product is installed, and a measuring roll or the like detects the speed of the product ejected from the die, and the speed signal is used to calculate the product ejection length using a calculation device, etc. Claim 1, characterized in that the position of the forming die is varied by the moving device at a predetermined position of a predetermined product discharge length, and the longitudinal cross section of the product is arbitrarily changed during extrusion molding. A method for extrusion molding of ceramic products with irregular cross-sections. 3. A forming die that can be arbitrarily varied in the thickness direction of the molded product using a moving device is incorporated into the die that forms the external shape of the product, and the speed of the extrusion molded product that occurs when the position of the forming die is varied using the moving device is controlled. 2. The method for extrusion molding ceramic products with irregular cross-sections according to claim 1, wherein the rotational speed of a screw for pumping the raw material of the extrusion molding machine is controlled so that the speed is detected by a measuring roll or the like and is constant.