JP2009274322A - Method for manufacturing profile curved extrusion-molded article and apparatus for manufacturing it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing rationally a profile curved molded article which can form a complicatedly curved profile extrusion-molded article rich in variation, and can take off an extruded molding raw material without collapsing of the shape when a plastic material is extruded. <P>SOLUTION: By horizontally shaking and turning at an arbitrary angle the direction of a movable mouthpiece part 21 of a rotating die 2 in an extruder 1 to the central axis in the extruding direction of the extruder, the molding raw material m is extruded obliquely at a curvature corresponding to the horizontally shaking angle from the movable mouthpiece part 21 to mold a curved part. The molding raw material m extruded while the curved part is molded like this, is carried on a taking-off table 3 freely movable in three axes XYθ driven synchronously in the same direction and at the same speed as the direction and the speed which the movable mouthpiece part 21 directs and extrudes, and is received and guided to convey in accordance with the extruding direction and speed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is an improvement of a method for manufacturing an extrusion-molded product and an apparatus for manufacturing the same, and more specifically, when a plastic material is extruded, the extruded molding material can be taken out without losing its shape, and has a complicated curved portion. The present invention relates to an epoch-making method capable of producing a deformed extruded product and a manufacturing apparatus therefor.

  Conventionally, as a method of continuously extruding an arc-shaped accessory using a hydraulic material such as cement, the present inventor has proposed “an extrusion method using a die shift and its apparatus” (see FIG. Patent Document 1).

  In this extrusion molding technique, two dies are arranged in parallel to the extrusion port formed in the container as viewed from the front of the extrusion port, and these two dies are attached to the extrusion direction shifted in the front-rear direction in plan view. The material to be extruded is bent by extruding the material from the outlet, and various bent products are to be extruded by appropriately adjusting the “deviation amount” as necessary.

  However, in the present invention, it is necessary to accurately set the “deviation amount” necessary to obtain the desired curved molded product while holding the two dies in parallel, and this “deviation amount” is set. It is difficult, and even if the bending angle “deviation amount” is set correctly, the curved molded product extruded from the die is deformed by frictional resistance at the time of take-up, and the desired shape is not finished. was there.

Therefore, the present inventor has invented a manufacturing method and a manufacturing apparatus for a curved extruded product (see Patent Documents 2 and 3). However, in a molded product obtained by such a manufacturing method and manufacturing apparatus, since it is limited to a bent product having a certain curvature, there are few variations in the form of the molded product. For example, a sealing member used for automobile parts, or an electrification There was dissatisfaction that it was not possible to sufficiently meet the demand for an extruded product having a complicated curved pattern such as a water leakage prevention packing member in a product.
JP 2001-1039 A JP 2006-326920 A JP 2006-103262 A

  The present invention has been made in view of the above-described problems in the conventional method and apparatus for manufacturing a curved molded product, and obtains an irregularly shaped extruded product that is curved in various ways. An innovative method capable of rationally manufacturing a deformed curved molded product by being able to take out the extruded molding material without losing its shape when extruding the plastic material. It is a technical problem to provide a manufacturing apparatus.

  The means adopted by the present inventors for solving the above technical problem will be described with reference to the accompanying drawings.

That is, in the present invention, the direction of the movable base portion 21 of the rotary die 2 in the extruder 1 is rotated and swung at an arbitrary angle α with respect to the central axis in the extrusion direction of the extruder. While forming the curved portion by inclining and extruding the molding material m to a curvature corresponding to the lateral swing angle,
An XYθ three-axis movable take-off table 3 that drives the molding material m to be extruded while forming the curved portion in synchronism with the same direction and speed as the direction and speed v in which the movable base 21 is pushed out. The rotary die is mounted on the surface, and is transferred and guided according to the direction and speed of extrusion to reduce distortion of the ground contact surface of the curved molded product M due to friction with the take-up table 3. By adopting the technical means of producing a deformed curved molded product M having a curved portion with a degree of curvature corresponding to a rotation angle of 2, a manufacturing method of a modified curved extruded product was completed.

Moreover, in order to solve the said subject, in addition to the said means as needed, this invention is the shaping | molding extruded from the rotary die 2 at each time T of an extrusion process based on the shape of the curved molding M which should be obtained. While the coordinate data P (X, Y, θ) of the landing point p that the material m inherits on the take-up table 3 is input to the control means,
The coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ) · P ₁ (X ₁ ) of the landing point p at each of these inputted times T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ). , Y ₁ , θ ₁ ) · P ₂ (X ₂ , Y ₂ , θ ₂ )... P _k (X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n )) The technical means was adopted in which the take-up table 3 moved to the position and angle, and the molding material m to be extruded was conveyed and guided one after another.

Furthermore, in order to solve the above-mentioned problems, the present invention, in addition to the above means, if necessary, the extrusion speed v and the extrusion pressure of the molding material m in the extruder 1 and the direction of the movable base portion 21 of the rotary die 2. Depending on the correlation with α, the coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ) · P ₁ of the landing point p at each time T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ). (X ₁ , Y ₁ , θ ₁ ) · P ₂ (X ₂ , Y ₂ , θ ₂ )... P _k (X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n )) Adopted a technical means to calculate.

Furthermore, in order to solve the above-mentioned problem, the present invention sets a fixed point as an origin on the absolute coordinate system in the coordinate data P (X, Y, θ) in addition to the above means as necessary. While a fixed point provided on the take-off table 3 is defined as a control reference point, each coordinate (x ′, y ′, θ ′) of the control reference point that moves momentarily in the absolute coordinate system is obtained.
In the coordinate system having the control reference point (x ′, y ′, θ ′) as the origin, each coordinate (x ″, y ″, θ ″) corresponding to each landing point p on the take-off table 3 is calculated. do it,
The technical means of inputting these coordinates (x ″, y ″, θ ″) to the control means and controlling the movement of the take-up table 3 was adopted.

Furthermore, in order to solve the above-mentioned problems, the present invention plots a plurality of points that match the shape of the curved molded product M to be obtained on the take-off table 3 in addition to the above means as necessary. Coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ), P ₁ (X ₁ , Y ₁ , θ ₁ ), P ₂ (X ₂ , Y ₂ , θ ₂ )... P _k ( X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n )) at each time T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ) The technical means of determining the extrusion speed v and extrusion pressure of the molding material 1 in 1 and the direction α of the movable base portion 21 of the rotary die 2 was adopted.

  Furthermore, in order to solve the above-mentioned problems, the present invention uses a hydraulic material such as cement as the plastic molding material that the extruder 1 extrudes as a curved molded product M having a required cross-sectional shape in addition to the above-described means as necessary. The technical means was adopted.

  Furthermore, in order to solve the above-mentioned problems, the present invention sinters a plastic molding material extruded by the extruder 1 as a curved molded product M having a required cross-sectional shape in addition to the above means as necessary. Adopted technical means to make it a sex substance.

  Furthermore, in order to solve the above-described problems, the present invention provides a thermoplastic resin in which the plastic molding material that the extruder 1 extrudes as a curved molded product M having a required cross-sectional shape is in a heat-softening state in addition to the above-described means as necessary. The technical means of making was adopted.

The present invention also includes an extruder 1 that pressurizes and presses a plastic molding material, and the plastic material that is attached to the extrusion head portion 11 of the extruder 1 and continuously molded into a curved molded product M having a required cross-sectional shape. A rotary die 2 for extruding, and a take-up table 3 for placing and conveying the curved molded product M extruded from the rotary die 2, and
The rotary die 2 includes a movable base part 21 that can swing left and right on the outlet side of the molding material m, a pair of die blocks 22 that move forward and backward according to the swinging motion of the movable base part 21, and the movable base part. A die angle adjusting mechanism unit 23 that rotates and rotates 21 to an arbitrary horizontal swing angle,
The take-up table 3 is movable in three directions of XYθ, and has the same direction as the direction and speed in which the curved molded product M to be pushed out from the movable base part 21 of the rotary die 2 is mounted and the movable base part 21 is directed and pushed out. In addition, the technology allows the molding material m to be molded in a deformed curved molded product M having a curved portion corresponding to the rotation angle of the movable base 21 by transferring and guiding the material in synchronization with the speed. By adopting a special means, a manufacturing apparatus for a profile-curved extruded product was completed.

  In the present invention, the direction of the movable die portion of the rotary die in the extruder is rotated and rotated at an arbitrary angle with respect to the central axis in the extrusion direction of the extruder, thereby forming the molding material from the movable die portion. While the curved portion is formed by inclining and extruding to a curvature corresponding to the lateral swing angle, the same direction as the direction and speed at which the movable base portion is directed and extruded while the curved portion is formed and then extruded. By adopting a processing means that is mounted on an XYθ triaxial movable take-up table that is driven in synchronism with the speed and that is transferred and guided according to the extrusion direction and speed, the take-off table is adopted. It is possible to rationally manufacture a deformed curved molded product having a curved portion with a curvature corresponding to the rotation angle of the rotary die while reducing the distortion of the ground contact surface of the curved molded product due to friction with the rotating die. .

  Therefore, by using the production method of the present invention, it becomes possible to continuously produce a curved molded product having a degree of curvature corresponding to the horizontal rotation angle of the rotary die with high accuracy, and is restricted by the hole size of the extrusion die. However, by arbitrarily adjusting and changing the horizontal rotation angle of the rotary die, it is possible to mass-produce complex irregularly shaped curved moldings with high efficiency.

  Incidentally, the extrusion molding material in which the method of the present invention is most effective is a hydraulic material such as cement, a sinterable material such as a ceramic kneaded material, or a thermoplastic resin in a heat-softening state, and curved molding is performed using these materials. In the case of manufacturing a product, particularly excellent utility can be obtained, and the obtained molded product has very little internal strain, so that there is no fear of deformation or cracking over time.

  In addition, the apparatus that specifically implements the present invention has a simple structure and can be manufactured at a low cost in terms of equipment cost, so that the fixed cost is low and it is very advantageous in view of the breakeven point. Furthermore, it is possible to obtain curved molded products having various cross-sectional shapes by exchanging the die, and thus it can be said that the utility value in the industry is very high.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.

  An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, what is indicated by reference numeral 1 is an extruder that pressurizes and extrudes a plastic molding material and includes an extrusion head 11 on the extrusion side. The extrusion head 11 is equipped with a rotating die 2 to be described later. In this embodiment, the extrusion head 11 has the same structure as a known extruder used for extrusion molding of a plastic molding material.

  Next, what is indicated by reference numeral 2 is a rotary die, and this rotary die 2 is connected to the extrusion head 11 of the extruder 1 and is movable to the left and right of the molding material. Part 21, a split die block 22 composed of a pair of one side block cylinder piece 22 a and another side block cylinder piece 22 b that move forward and backward according to the swinging motion of this movable base part 21, and the movable base part 21 The die angle adjusting mechanism unit 23 is driven to an arbitrary lateral swing angle α.

  The die angle adjusting mechanism 23 enabling the movable base 21 to swing left and right in the rotary die 2 is rotated in the forward and reverse directions by the rotational movement of the rotary drive body 23a (control motor in this embodiment). A worm 23b that engages with the worm 23b, and an angle adjustment rod 23d that adjusts the lateral rotation angle α of the movable base portion 21 of the rotary die 2 in accordance with the forward / reverse rotation of the gear 23c. Yes. Incidentally, the shape of the extrusion port of the movable base 21 in the present embodiment has a horizontal U-shaped cross section with a length of 80 mm and a height of 30 mm.

  Also, what is indicated by reference numeral 3 is a take-up table, and this take-up table 3 carries a curved molded product M pushed out from the movable base 21 of the rotary die 2, and the movable base 21 is oriented. Thus, it is a mechanism that can carry over and guide the transfer in synchronization with the same direction and speed as the direction and speed v to be extruded (see FIG. 2).

  The take-up table 3 in this embodiment is movable in three axes XYθ, that is, can move horizontally in the X-axis direction and the Y-axis direction on a plane orthogonal to each other, and can rotate at an angle θ. Thus, these three axial movements can be combined and performed simultaneously.

  As a specific example, as shown in FIGS. 3A, 3B, and 3C, it can be configured by sequentially superposing tables each having a mechanism for driving in the respective axial directions. The control motors 31a, 31b, 31c can be rotated and driven. It should be noted that there is no problem in driving and control even if the overlapping order is changed.

  The take-up table 3 is disposed below the rotary die 2 in the extruder 1. In this embodiment, the take-up table 3 is further connected to the extrusion port edge 21 a in the movable base portion 21 of the rotary die 2. The feeding slide plate 24 is interposed between the take-up table 3 and the transfer can be made smooth.

  By the way, the position where the take-up table 3 inherits the curved molded product M pushed out from the rotary die 2 is a landing point p that hangs down from the extrusion port edge 21a of the movable base 21 in the rotary die 2 and contacts the take-up table 3. (See FIG. 4).

  The direction and speed of the take-up table 3 at the landing point p need to be synchronized with the extrusion direction and speed v of the curved molded product M extruded from the rotary die 2. This is because if the rotational speed at the inheritance position (landing point p) of the take-up table 3 and the extrusion speed of the curved molded product M do not match, tensile deformation or compressive deformation occurs in the molded product.

  The “extrusion speed” is the extrusion distance per unit time of the curved molded product M (molding material m) extruded from the rotary die 2 (also referred to as linear speed. For example, cm / s or m / min). Can be adopted. This linear velocity may not be uniform depending on the left and right positions of the extrusion mouth edge 21a of the movable base 21 (the inside of the curve is slow and the outside is fast), so an average value, maximum value, minimum value, etc. may be adopted. it can.

In addition, as the “extrusion speed”, the extrusion volume (for example, cm ³ / s) per unit time of the curved molded product M (molding material m) extruded from the rotary die 2 can also be adopted. This is because when the rotational speed of the screw of the extruder 1 is controlled, the amount is proportional to the rotational speed. In this case, it is necessary to synchronize in terms of the dimension of the speed (for example, cm / s or m / min) at which the take-up table 3 moves.

  A method for controlling the take-up table 3 in the manufacturing method of the present embodiment will be described. First, the shape of the curved molded product M to be obtained is determined. In this embodiment, an S-shaped curved molded product M as shown in FIG. 5 is manufactured.

Based on this curved shape, each coordinate data P (P ₀ , P ₁ , P ₂ ...) Of the landing point p at which the molding material m extruded from the rotary die 2 is inherited on the take-up table 3 at each time T. P _k ... P _n ) is obtained (see FIG. 5) and input to the control means (in this embodiment, a known general-purpose personal computer), thereby moving the take-up table 3.

Here, in the present embodiment, when obtaining the coordinate data P _k (X _k , Y _k , θ _k ) of the landing point p, in order to make the movement control of the take-up table 3 easier, the following is performed. In addition, it is preferable to temporarily calculate and determine the “control reference point Q” on the take-up table 3 (see FIG. 6).

That is, first, the fixed point is set as the origin of the absolute coordinate system, while the fixed point (center point or the like) provided on the take-off table 3 is defined as the control reference point Q, and the control moves every moment in the absolute coordinate system. Each coordinate Q _k (x ′ _k , y ′ _k , θ ′ _k ) of the reference point Q is _obtained .

Next, in the coordinate system (relative coordinate system) with the control reference point Q _k (x ′ _k , y ′ _k , θ ′ _k ) on the take-up table 3 as the origin, Coordinates (table coordinates) p _k (x ″ _k , y ″ _k , θ ″ _k ) corresponding to the point p are calculated, respectively, and the table coordinates p _k (x ″ _k , y ″ _k , θ) are calculated. The movement of the take-off table 3 is controlled by inputting ″ _k ) into the control means. By using this process, the coordinates of the landing point p become the reference of the take-off table 3, and the control can be simplified.

In the present embodiment, the set interval can be narrowed by dividing the interval of the coordinates P (P ₀ · P ₁ · P ₂ ...) Shown in FIG. It can be carried out. In addition, in a straight line portion and a constant curvature portion, points where coordinates are provided can be set only at both ends (start point and end point).

  Further, in the present embodiment, in the shape of the curved molded product M, circular interpolation or the like is effective as one of the techniques for increasing the accuracy of the product for smoothing processing at a location where the curvature changes. .

  Then, the take-up table 3 is moved based on the data input to the control means. In this case, in the present embodiment, the X-axis movable plate, the Y-axis movable plate, and the rotary movable plate can be moved by driving the control motors 31a, 31b, and 31c, respectively.

In this way, the coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ) · P of the landing point p at each input time T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ). ₁ (X ₁ , Y ₁ , θ ₁ ) · P ₂ (X ₂ , Y ₂ , θ ₂ )... P _k (X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n ) ), The take-out table 3 can be moved to guide the extruded molding material m one after another.

  At this time, the direction of the movable base portion 21 of the rotary die 2 in the extruder 1 is rotated and rotated at an arbitrary angle α with respect to the central axis in the extrusion direction of the extruder, thereby forming the molding material from the movable base portion 21. The bending portion can be formed by inclining and pushing m to a curvature corresponding to the lateral swing angle.

  Then, the molding material m to be extruded while forming the curved portion in this way is driven in synchronism with the direction and the speed v in which the movable base 21 is directed and pushed in the same direction and at the speed v. It can be mounted on the table 3 and transferred and guided according to the extrusion direction and speed.

  With this configuration, the deformation of the ground contact surface of the curved molded product M due to friction with the take-off table 3 can be reduced, and a deformed shape having a curved portion with a curvature corresponding to the rotation angle of the rotary die 2 can be obtained. A curved molded product M can be manufactured (see FIG. 7).

In the present embodiment, each time T (T ₀ ...) Is determined based on the correlation of each parameter with the extrusion speed v and extrusion pressure of the molding material m in the extruder 1 and the direction α of the movable die portion 21 of the rotary die 2. Coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ) · P ₁ (X ₁ , Y ₁ , θ ₁ ) · P ₂ (T ₁ · T ₂ ... T _k ... T _n ) X ₂ , Y ₂ , θ ₂ )... P _k (X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n )) can also be calculated. By doing so, it is possible to use the apparatus control data input to control the extruder 1 as it is and to link it with it, and it is necessary to determine the product shape of the curved molded product M and input the data in advance. As a result, the manufacturing process can be simplified.

  In the present embodiment, the plastic molding material that the extruder 1 extrudes as a curved molded product M having a required cross-sectional shape is a hydraulic substance such as cement, or the plastic molding material is a sinterable substance such as a ceramic kneaded material. The thermoplastic resin in a heat-softening state can be obtained.

  Among these, when extruding a thermoplastic resin in a heat-softening state, a cooling mechanism is provided for cooling the molded article immediately after being extruded because the fluidity is relatively high and the shape stability is low at high temperatures. It is preferable.

Also, in the present embodiment, conversely, points that match the shape of the curved molded product M to be obtained are plotted on the take-off table 3, while each coordinate data P (P ₀ (X ₀ , Y _{0) of} these points is plotted. , Θ ₀ ) · P ₁ (X ₁ , Y ₁ , θ ₁ ) · P ₂ (X ₂ , Y ₂ , θ ₂ ) ... P _k (X _k , Y _k , θ _k ) ... P _n (X _n , Y _n , θ _n )), and the extrusion speed v and extrusion pressure of the molding material m in the extruder 1 and the rotary die at each time T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ) The direction α of the two movable cap parts 21 can be determined.

  As a specific example, the extruder 1 is controlled so that the value of the inclination angle α is increased in a portion where the radius of the curved molded product M is small in view of the relative relationship between the distance and angle between the plotted coordinates. Alternatively, in the case of a straight portion, the extruder 1 can be controlled by increasing the speed if there is no problem in molding even if the extrusion speed v is increased.

  In addition, when calculating the data value for the extruder control in a reverse calculation in this way, various parameters regarding the physical properties of the molding material m are required. For example, viscosity, density, fluidity, Each numerical value such as a sliding friction coefficient is stored in a database and used for correction as appropriate.

[Example 1]
A process for manufacturing a deformed curved extruded product having curved portions having different curvatures using the manufacturing apparatus of the present invention will be described. In Example 1, a cement kneaded material prepared with the following blending ratio was used as a plastic molding material.
(1) Portland cement 30-50 wt%
(2) Quartzite 20-40 wt%
(3) Lightweight aggregate 10-25 wt%
(4) Pulp 3-5 wt%
(5) PP fiber 0.5-1.5 wt%
(6) MC (methyl cellulose) 2 to 3 wt% (as water retention and thickening agent)

  The cement kneading material of the above composition is put into the hopper of the extruder 1, and the movable base part 21 of the rotary die 2 is first inclined to the left by 30 ° with respect to the straight running direction, and is swung to an arbitrary angle. The curved molded product M is extruded onto the tray mounted on the take-up table 3 at a speed of 2 m / min. The curved molded product M thus extruded is cut by a cutter device (not shown) when it reaches a predetermined size in an uncured state.

  The uncured cement curve molding M obtained in this way is moved for each tray, conveyed to an auto grave chamber (not shown), cured under high temperature and high pressure, and completed as a curve extrusion molding product.

[Example 2]
Next, in Example 2, a cement kneaded material prepared with the following blending ratio was used as a plastic molding material.
(1) Portland cement 60-80 wt%
(2) Lightweight aggregate 10-25 wt%
(3) Pulp 3-5 wt%
(4) PP fiber 0.5-1.5 wt%
(5) MC (methyl cellulose) 2 to 3 wt% (as water retention and thickening agent)

  The cement kneading material of the above composition is put into the hopper of the extruder 1, and the movable base 21 of the rotary die 2 is first inclined to the left by 30 ° with respect to the straight direction, and is swung to an arbitrary angle. The curved molded product M was extruded onto the take-up table 3 at 2 m / min.

  The uncured curved molded product M thus inclined and pushed is carried on the take-up table 3 that moves at the transfer position, and is curved and shaped along the conveyance path. Incidentally, in the manufacturing apparatus of the present embodiment, since the tray is placed on the take-up table 3, the curved molded product M pushed out from the rotary die 2 is placed on the tray. The molding is carried out in the state. Thus, the uncured cement curved molding M is cut by the cutter device when it has a desired shape having a plurality of curved portions designed in advance.

  The curved molded product M obtained in this way is moved for each tray, conveyed to an auto grave chamber (not shown), and steam cured under normal pressure, thereby completing a curved extruded product.

Example 3
Next, in Example 3, an irregular curve extrusion molding was performed using a thermoplastic resin material.
〔Facility〕
Extruder: Single-screw extruder manufactured by Kasamatsu Chemical Research Laboratory [Molding conditions]
Material: Miralastomer EK-700 (Olefin-based thermoplastic elastomer manufactured by Mitsui Chemicals)
Mold shape: Hollow packing shape (cross-sectional shape shown in FIG. 8)
Mold temperature: 180 ° C
Resin temperature: 162 ° C
〔result〕
Air cooling is performed immediately after the thermoplastic resin molded product is taken out of the mold under the above conditions, and it is mounted on a molding table while solidifying its shape, and has an arbitrary radius (variable molding is possible at R = 10 mm or more). An irregular cross-sectional shape product was obtained. Further, a molded product having the same curvature range was obtained even in a flat plate shape (height 8.5 mm × width 34 mm, height 12.5 mm × width 34 mm).

  The embodiments of the present invention are generally as described above. However, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Describes an example in which a hydraulic cement kneading material is used as the plastic molding material. However, the present invention can also be applied to curved molding of a kneaded material obtained by kneading various ceramic materials having sintering properties, porcelain earth, fine ceramic materials such as alumina, zirconia, mullite, and cordierite into clay. Needless to say, it belongs to the technical scope of the present invention.

  As described above, as described with reference to the examples, according to the present invention, the molding material extruded from the extruder can be made easily and accurately without depending on a complicated mechanism as compared with the conventional extrusion molding apparatus. In addition to providing a curved shape with a complex arbitrary curvature, it is possible to obtain an extruded product with a deformed shape, and it is not inadvertently deformed when the extruded curved product is taken up. Is big.

It is perspective explanatory drawing which showed the outline of the manufacturing apparatus of embodiment of this invention. It is explanatory top view which showed the manufacturing apparatus of embodiment of this invention. It is the disassembled perspective view which showed the manufacturing apparatus of embodiment of this invention. It is explanatory side view which showed the manufacturing apparatus of embodiment of this invention. It is explanatory top view which showed the control means of the manufacturing method of embodiment of this invention. It is explanatory top view which showed the control means of the manufacturing method of embodiment of this invention. It is the fragmentary top view which showed the outline of the movement mechanism of the manufacturing apparatus of embodiment of this invention. It is the front view which showed the extrusion port shape of the movable nozzle | cap | die part in Example 3 of this invention.

Explanation of symbols

1 Extruder
11 Extrusion head 2 Rotating die
21 Movable base part
21a Extrusion edge
22 die block
22a Block block on one side
22b Block block on the other side
23 Die angle adjustment mechanism
23a Rotating drive
23b Warm
23c gear
23d Angle adjustment rod
24 Feed sliding plate 3 Take-up table
31a X-axis control motor
31b Y-axis control motor
31c θ-axis control motor M Curved molding m Molding material

Claims (9)

The direction of the movable base portion 21 of the rotary die 2 in the extruder 1 is rotated and rotated at an arbitrary angle α with respect to the central axis in the extrusion direction of the extruder, whereby the molding material m is transferred from the movable base portion 21 to the above-described molding material m. While forming a curved part by inclining and extruding to a curvature according to the lateral swing angle,
An XYθ three-axis movable take-off table 3 that drives the molding material m to be extruded while forming the curved portion in synchronism with the same direction and speed as the direction and speed v in which the movable base 21 is pushed out. The rotary die is mounted on the surface, and is transferred and guided according to the direction and speed of extrusion to reduce distortion of the ground contact surface of the curved molded product M due to friction with the take-up table 3. A method for producing a modified curved extruded product, comprising producing a modified curved molded product M having a curved portion having a curvature corresponding to a rotation angle of 2. Based on the shape of the curved molded product M to be obtained, each coordinate data P (X, Y) of the landing point p that the molding material m extruded from the rotary die 2 inherits on the take-up table 3 at each time T of the extrusion process. , Θ) to the control means,
The coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ) · P ₁ (X ₁ ) of the landing point p at each of these inputted times T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ). , Y ₁ , θ ₁ ) · P ₂ (X ₂ , Y ₂ , θ ₂ )... P _k (X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n )) 2. The method of manufacturing a deformed curved extruded product according to claim 1, wherein the take-up table 3 is moved to a position and an angle, and the extruded material m is conveyed and guided one after another. Depending on the correlation between the extrusion speed v and extrusion pressure of the molding material m in the extruder 1 and the direction α of the movable base 21 of the rotary die 2, each time T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ) coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ), P ₁ (X ₁ , Y ₁ , θ ₁ ), P ₂ (X ₂ , Y ₂ , θ ₂ )) ... P _k (X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n )) is calculated. In the coordinate data P (X, Y, θ), the fixed point is set as the origin on the absolute coordinate system, while the fixed point provided on the take-off table 3 is defined as the control reference point, and moves constantly in the absolute coordinate system. While obtaining the coordinates (x ′, y ′, θ ′) of the control reference point to be
In the coordinate system having the control reference point (x ′, y ′, θ ′) as the origin, each coordinate (x ″, y ″, θ ″) corresponding to each landing point p on the take-off table 3 is calculated. do it,
4. The modified curved extrusion product according to claim 2, wherein the coordinates (x ″, y ″, θ ″) are input to the control means to control the movement of the take-off table 3. Method. While a plurality of points matching the shape of the curved molded product M to be obtained are plotted on the take-off table 3, each coordinate data P (P ₀ (X ₀ , Y ₀ , θ ₀ ) · P ₁ ( X ₁ , Y ₁ , θ ₁ ) · P ₂ (X ₂ , Y ₂ , θ ₂ )... P _k (X _k , Y _k , θ _k )... P _n (X _n , Y _n , θ _n )) Based on this, at each time T (T ₀ · T ₁ · T ₂ ... T _k ... T _n ), the extrusion speed v and extrusion pressure of the molding material m in the extruder 1 and the direction of the movable base 21 of the rotary die 2. 2. The method for producing a deformed curved extruded product according to claim 1, wherein [alpha] is determined.   The deformed curved extruded product according to any one of claims 1 to 5, wherein the plastic molding material extruded by the extruder 1 as a curved molded product M having a required cross-sectional shape is a hydraulic substance such as cement. Production method.   The deformed curve according to any one of claims 1 to 5, wherein the plastic molding material extruded by the extruder 1 as a curved molded product M having a required cross-sectional shape is a sinterable material such as a ceramic kneaded material. Extruded product manufacturing method.   6. The modified curved extrusion molding according to any one of claims 1 to 5, wherein the plastic molding material that the extruder 1 extrudes as a curved molded product M having a required cross-sectional shape is a thermoplastic resin in a heat-softening state. Product manufacturing method. An extruder 1 that pressurizes and feeds a plastic molding material, and a rotary die 2 that is attached to an extrusion head portion 11 of the extruder 1 and that continuously molds the plastic material into a curved molded product M having a required cross-sectional shape. And a take-off table 3 for placing and transporting the curved molded product M pushed out from the rotary die 2, and
The rotary die 2 includes a movable base part 21 that can swing left and right on the outlet side of the molding material m, a pair of die blocks 22 that move forward and backward according to the swinging motion of the movable base part 21, and the movable base part. And a die angle adjusting mechanism unit 23 that rotationally drives 21 to an arbitrary lateral swing angle α,
The take-up table 3 is movable in three directions of XYθ, and is mounted with a curved molded product M pushed out from the movable base part 21 of the rotary die 2 and has the same direction and speed v as the movable base part 21 is directed and pushed out. It is possible to form a deformed curved molded product M having a curved portion with a degree of curvature corresponding to the rotation angle of the movable base 21 by transferring and guiding the material in synchronization with the direction and speed. Production equipment for deformed curved extrusions.