JP2011173145A - Extrusion molding device, extruded shape material and extrusion molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve flexibility in a shape of an extruded shape material and mold the extruded shape material with good accuracy. <P>SOLUTION: An extrusion molding device includes a guide member 5 having first guide faces 7b and second guide faces 8a extending in a tilted direction with respect to the direction of the first guide faces 7b and the extruding direction of the extruded shape, first slide faces 12a moving along the first guide faces 7b, and second slide faces 12b extending in a tilted direction with respect to the first slide faces 12a. The extrusion molding device includes movable dice 10 that has drive members 12 movable along the first guide faces 7b, faces 10b to be slid sliding along the second slide faces 12b corresponding to the movement of the drive members 12, faces 10c to be guided that is guided to the second guide faces 8a corresponding to the movement of the drive members 12, and molding faces 10a of the extruded shape formed along the extruding direction of the extruded shape 50. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an extrusion molding apparatus, an extrusion profile, and an extrusion molding method.

  Conventionally, as disclosed in the following Patent Documents 1 and 2, there is known an extrusion molding apparatus that can change the thickness and width of an extruded shape member by moving a movable die by a driving member. For example, in the molding apparatus disclosed in Patent Document 1, the drive member is driven in the extrusion direction, while the die holder has an inclined surface. When the drive member pushes up the lower surface of the movable die, the movable die moves along the inclined surface of the die holder, and the interval between the movable dies is reduced. On the other hand, in the molding apparatus disclosed in Patent Document 2, an inclined surface is formed on the die guide, and the movable die moves along the inclined surface. The movable die is coupled to a drive member that is pin-coupled to the pivot lever, and moves in the direction of the inclined surface of the die guide in response to the swing of the pivot lever.

JP 2002-35822 A JP 2008-68268 A

  In the extrusion molding apparatus of Patent Document 1, when the lower surface of the movable die is pushed up by the driving member of the driving device, the movable die moves along the inclined surface of the die holder. At this time, the movable die is lateral to the driving member. Therefore, when the movable die slides with respect to the driving member, chatter vibration due to friction may occur, and there is a problem that the extruded shape cannot be formed with high accuracy.

  On the other hand, in the extrusion molding apparatus of Patent Document 2, since the movable die is pin-coupled to the drive member, chatter vibration does not occur as in Patent Document 1, but according to the moving speed of the drive shaft that drives the pivot lever. Since the moving speed of the driving member is determined, there is no way to adjust the moving speed of the movable die other than adjusting the driving speed of the driving shaft (driving source). For this reason, there is a problem that the shape of the extruded shape material to be formed is restricted.

  Therefore, the present invention has been made in view of the above points, and an object of the present invention is to improve the degree of freedom of the shape of the extruded shape to be molded and to accurately mold the extruded shape. It is in.

  To achieve the above object, the present invention provides a guide member having a first guide surface and a second guide surface extending in a direction inclined with respect to the direction of the first guide surface and the extrusion direction of the extruded shape member. And a first sliding surface that moves along the first guide surface and a second sliding surface that extends in a direction inclined with respect to the first sliding surface, and is driven by a drive source. A drive member movable along the first guide surface; a sliding surface that slides along the second sliding surface of the drive member in accordance with the movement of the drive member; and movement of the drive member. And a movable die having a guided surface guided by the second guide surface of the guide member and a molding surface of the extruded shape member formed along the extrusion direction of the extruded shape material. This is an extrusion molding apparatus.

  In the present invention, when the driving member moves so that the first sliding surface of the driving member follows the first guiding surface of the guide member, the movable die slides with respect to the second sliding surface of the driving member. While moving, the guided surface moves along the second guide surface of the guide member. Since the second guide surface of the guide member is inclined with respect to the pushing direction, chatter vibration does not occur when the movable die moves, and the movable die moves along the second guide surface. Accordingly, the molding surface changes its position in a direction inclined in the extrusion direction. Thereby, the width | variety of the extruded shape material changes sequentially. At this time, the ratio of the moving speed of the movable die to the moving speed of the driving member is determined according to the angle formed by the second sliding surface of the driving member and the second guiding surface of the guide member. Therefore, the moving speed of the movable die can be adjusted by setting the direction of the second sliding surface of the drive member and the direction of the second guide surface of the guide member. For this reason, the freedom degree of the shape of the shape material to extrude can be improved by setting the direction of a 2nd sliding surface and a 2nd guide surface according to the shape of the extrusion shape material to shape | mold. Further, since chatter vibration due to friction does not occur when the movable die slides, the extruded shape can be accurately formed.

  Here, the drive member may be formed with a guide groove extending along the relative movement direction of the movable die.

  In this aspect, the movement of the movable die can be stabilized even when a large force acts on the movable die as in the extrusion of the extruded shape member.

  In addition, two each of the first guide surface and the second guide surface may be provided. In this case, it is preferable that the drive member and the movable die are provided in two each. It is preferable that a pair of opposed surfaces of the extruded shape member be formed by the molding surface of each movable die. In this aspect, the opposed surfaces of the extruded profile can be changed.

  The present invention is an extruded shape member that is extruded by the extrusion molding apparatus and has an inclined portion in which the width in one direction out of the directions orthogonal to the extrusion direction varies along the extrusion direction. .

  The present invention relates to a molding method in which an extruded shape is extruded through a molding surface of a movable die, and a driving source is driven so that a first sliding surface of the driving member is along the first guiding surface of the guide member. The driving member is moved in the pushing direction, and the guided surface of the movable die is slid with respect to the second sliding surface of the driving member according to the movement of the driving member, and the direction of the first guiding surface Extrusion that guides the movable die along the second guide surface of the guide member inclined with respect to the extrusion direction of the extruded shape member and extrudes the extruded shape member while changing the position of the molding surface of the movable die. This is a molding method.

  As described above, according to the present invention, it is possible to improve the degree of freedom of the shape of the extruded shape to be molded and to accurately mold the extruded shape.

It is a figure showing roughly composition of an extrusion molding device concerning an embodiment of the present invention. It is a perspective view which shows one drive member and movable die | dye provided in the said extrusion molding apparatus. It is sectional drawing which shows the shaping | molding part of the said extrusion molding apparatus in case the said drive member exists in a lower position. It is sectional drawing which shows the shaping | molding part of the said extrusion molding apparatus in case the said drive member exists in an upper position. It is a figure which shows the profile shape | molded by the said extrusion molding apparatus.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows the overall configuration of an extrusion molding apparatus according to an embodiment of the present invention. As shown in the figure, an extrusion molding apparatus (hereinafter simply referred to as a molding apparatus) according to this embodiment includes a container 2 in which a billet (not shown) can be loaded, and a stem 4 for pressing the billet in the container 2. The guide member 5, the fixed die 6, the pair of movable dies 10 and 10, the pair of drive members 12 and 12, and the pair of drive mechanisms 14 and 14 are provided. In this molding apparatus, a billet is loaded into a container 2 and the billet in the container 2 is pushed out by a stem 4.

  The guide member 5 is a part for guiding the movable die 10 and the drive member 12 when moving, and includes a holder portion 7 and a die guide 8. The fixed die 6 is disposed at the extrusion side end portion of the container 2 and is fixed between the container 2, the die guide 8 and the holder portion 7.

  The fixed die 6 is provided with a through hole 6a (see FIG. 3) penetrating in the extrusion direction (Z direction). The billet in the container 2 is pushed through the through hole 6a into the molding space S1 defined by the movable die 10 and the die guide 8. In the present embodiment, the through hole 6a is configured to be able to form a rectangular inner hole 50a.

  The holder portion 7 is formed integrally with the die guide 8 and is disposed on the extrusion side of the fixed die 6. The holder portion 7 is formed with a guide hole 7a into which the pair of driving members 12, 12 can be inserted. The guide hole 7a is formed so as to extend in the extrusion direction, and a cross-sectional shape in a direction orthogonal to the direction is constant in the extrusion direction. An inner peripheral surface of the guide hole 7 a in the holder portion 7 functions as a first guide surface 7 b that guides the driving member 12.

  The die guide 8 is adjacent to the end of the fixed die 6 on the extrusion side. As shown in FIG. 3, the die guide 8 is formed in a cylindrical shape through which the molding space S1 penetrates in the extrusion direction, and a pair of insertion spaces S2 through which the pair of movable dies 10 are inserted communicates with the molding space S1. It is formed as follows. The insertion space S2 is a space having a symmetrical shape.

  The molding space S1 communicates with the through hole 6a of the fixed die 6 at the upstream end, and is a space that is long in the extrusion direction. In the molding space S1, the front and back inner surfaces (the inner surface of the die guide 8) in FIG. 3 are formed in a plane parallel to the extrusion direction. That is, the width of the molding space S1 in the direction perpendicular to the paper surface (Y direction) in FIG. 3 is constant along the extrusion direction.

  Each insertion space S2 is a space through which the movable die 10 is inserted, and an inner end portion of the insertion space S2 opens to the inner surface of the die guide 8 facing the X direction orthogonal to the Y direction. And insertion space S2 is extended in the inclination direction so that it may move away from shaping | molding space S1 as it goes to the downstream of an extrusion direction. The inner peripheral surface of the insertion space S2 in the die guide 8 functions as a second guide surface 8a extending in a direction inclined with respect to the direction of the first guide surface 7b and the extrusion direction of the extruded shape member 50.

  Both the movable dies 10 and 10 are formed in symmetrical shapes, have a rectangular cross section, and have a constant width along the longitudinal direction. The movable dies 10 each have a molding surface 10a, a slide surface 10b, and a guided surface 10c. The movable die 10 is inserted into the insertion space S2 in such a posture that the molding surface 10a is located inside the X direction, and can be slid along the inner peripheral surface (second guide surface) 8a of the insertion space S2. .

  The molding surface 10a is a part for molding the shape material in the molding space S1, has a slight width in the extrusion direction, and is parallel to the extrusion direction. As the billet passes through the gap between the molding surfaces 10a, 10a of the two movable dies 10, 10, an extruded shape is formed. Further, the molding surface 10a moves in a direction inclined with respect to the extrusion direction in accordance with the movement of the movable die 10 as described above. Therefore, the width in one direction of the extruded shape member 50 changes according to the movement of the movable die 10.

  The sliding surface 10b is a surface for converting the movement of the driving member 12 in the pushing direction into a direction inclined from the pushing direction, and is slidable along a second sliding surface 12b (described later) of the driving member 12. It has become. The slide surface 10b is formed by the outer end surface of the movable die 10, and the slide surface 10b is inclined with respect to the pushing direction and is formed in a forming space as it goes in the direction opposite to the moving direction of the profile 50. It is formed so as to extend in a direction away from S1. As shown in FIG. 2, the sliding surface 10b protrudes in the Y direction and extends along a direction away from the molding space S1 in a direction opposite to the moving direction of the profile. 10d is formed.

  The guided surface 10c is a portion guided by an inner peripheral surface (second guide surface) 8a of the insertion space S2 formed in the die guide 8. The guided surface 10c is formed between the molding surface 10a and the slide surface 10b, and is in sliding contact with the inner peripheral surface 8a of the insertion space S2.

  The pair of drive members 12, 12 drive the movable die 10 in response to swinging of a pivot lever 20 described later of the drive mechanism 14. Both the drive members 12, 12 are formed symmetrically with each other.

  Each drive member 12 has a first sliding surface 12a and a second sliding surface 12b. The first sliding surface 12 a extends in a direction parallel to the pushing direction, and is in sliding contact with the inner peripheral surface (first guiding surface) 7 b of the guide hole 7 a in the holder portion 7. The second sliding surface 12b extends in a direction inclined with respect to the first sliding surface 12a. Specifically, the second sliding surface 12b is inclined so as to approach the molding space S1 toward the downstream side in the extrusion direction. The second sliding surface 12b is a part for sliding the sliding surface 10b of the movable die 10. When the drive member 12 moves along the guide hole 7 a of the holder portion 7, the movable die 10 moves in the insertion space S <b> 2 by a movement amount corresponding to the movement amount of the drive member 12. When the driving member 12 moves upward, the movable die 10 moves toward the molding space S1, and when the driving member 12 moves downward, the movable die 10 moves in a direction away from the molding space S1.

  The movable die 10 is moved relative to the driving speed of the driving member 12 by adjusting the inclination angle of the second sliding surface 12b of the driving member 12 and the angle formed between the sliding surface 10b and the guided surface 10c of the movable die 10. The speed ratio can be adjusted. Therefore, the moving speed of the movable die 10 can be adjusted without adjusting the driving speed of the driving source 16 (described later).

  As shown in FIG. 2, a guide groove 12 c is formed on the second sliding surface 12 b of the drive member 12. The guide groove 12c is a guide part for guiding the protruding part 10d of the movable die 10, and is inclined so as to approach the molding space S1 toward the downstream side in the extrusion direction.

  As shown in FIG. 1, the drive mechanisms 14 are provided in pairs so as to correspond to the respective drive members 12. The drive mechanism 14 is for driving the drive member 12 to move the movable die 10, and is a servo motor 16 (drive source), a drive shaft 18 driven by the servo motor 16, and driving of the drive shaft 18. The pivot lever 20 swings in conjunction with the pivot lever 20 and a connecting member 22 pin-coupled to one end of the pivot lever 20. The connecting member 22 is pin-coupled to the pivot lever 20 at the lower end and is pin-coupled to the drive member 12 at the upper end.

  The drive shaft 18 extends linearly from one end to the other end of the extension line of the drive member 12 toward the side opposite to the flow region of the shape member. The servo motor 16 is coupled to the other end of the drive shaft 18. Thereby, the servomotor 16 is arrange | positioned in the position away on the outer side of the shaping | molding apparatus. The drive shaft 18 moves forward and backward in the longitudinal direction by driving the servo motor 16.

  The pivot lever 20 is provided with a support shaft portion 20b at an intermediate portion thereof, and is configured to be swingable around the support shaft portion 20b. The pivot lever 20 has a first part extending downward from the support shaft part 20b and a second part extending laterally from the support shaft part 20b. One end of the drive shaft 18 is rotatably coupled to the first end 20a, which is the lower end of the first part. The lower end portion of the connecting member 22 is rotatably coupled to the second end portion 20c that is the distal end portion of the second portion. As a result, the pivot lever 20 swings about the support shaft portion 20b as a fulcrum as the drive shaft 18 moves forward and backward. The drive member 12 moves in the vertical direction as the pivot lever 20 swings.

  In FIG. 1, the right and left drive shafts 18 are in the protruding positions, while the left drive member 12 is in the upper position and the right drive member 12 is in the lower position. Is shown. When the drive member 12 is lowered, the drive shaft 18 is actually in the retracted position.

  In the extrusion molding apparatus of the present embodiment, for example, it is possible to extrusion-mold a shape member 50 formed so that parallel portions 51 and 52 and an inclined portion 55 as shown in FIGS. 4 and 5 are continuous in the extrusion direction. It is. This extrusion molding is performed by hot extrusion. In order to form the profile 50 by the molding apparatus of this embodiment, first, a billet is loaded into the container 2, and this billet is extruded by the stem 4.

  As shown in FIG. 3, at the time of extrusion, when both the drive members 12, 12 are in the lowered position (lower position) and each movable die 10 is in contact with the upper end position of the drive member 12, the movable die 10 is formed. The surfaces 10a are separated from each other. In this state, the wide parallel part 51 is pushed out. At this time, the drive shaft 18 is in a retracted state.

  When the drive shaft 18 is gradually protruded by driving the servo motor 16, the pivot lever 20 swings, and the drive member 12 is gradually guided upward while being guided by the guide hole 7 a of the holder portion 7. Moving. As a result, the movable die 10 advances in the insertion space S2 while the protrusion 10d is guided by the guide groove 12c and displaced with respect to the second sliding surface 12b of the drive member 12. Thereby, since the gap | interval between the molding surfaces 10a and 10a of both the movable dies 10 and 10 becomes narrow gradually, the width | variety of the profile 50 extruded is reduced gradually in connection with it. In this way, the inclined portion 55 is formed.

  Next, when the state shown in FIG. 3 is changed to the state shown in FIG. 4 and the drive member 12 is fixed in a stopped state, the movable die 10 is stopped at the forward movement position. The material 50 is extruded with a constant width. At this time, the narrow parallel portion 52 is extruded. In addition, although the parallel part 51, the inclination part 55, and the parallel part 52 differ in the width | variety of one direction, the width | variety of the direction orthogonal to this direction is constant. Further, the inner hole of the profile 50 has a constant cross section in the parallel part 51, the inclined part 55 and the parallel part 52. That is, in the shape member 50, the cross-sectional area of the inner hole 50a is constant over the length direction, and the parallel portion 51 and the parallel portion 52 have different thicknesses in one direction.

  In order to form the inclined portion 55 and the wide parallel portion 51 following the narrow parallel portion 52, the drive member 12 may be driven in the opposite manner. That is, after the shape member 50 is pushed out by stopping the movable die 10 at the forward movement position with the drive shaft 18 fixed at the protruding position, the drive shaft 18 is gradually drawn. As a result, the pivot lever 20 swings and the drive member 12 gradually moves from the upper position to the lower position. Accordingly, the movable die 10 is gradually retracted from the advance position. At this time, the movable die 10 slides with respect to the second sliding surface 12 b of the drive member 12 because the protrusion 10 d is engaged with the guide groove 12 c of the drive member 12. As a result, the gap between the molding surfaces 10a, 10a is gradually increased, and the width of the extruded shape member 50 is gradually increased accordingly. In this way, the inclined portion 55 is formed. Thereafter, when the movable die 10 is fixed at the retracted position, the parallel portion 51 is pushed out again.

  As described above, in the extrusion molding apparatus of this embodiment, when the drive member 12 moves so that the first sliding surface 12a of the drive member 12 is along the first guide surface 7b of the guide member 5 (holder portion 7). The movable die 10 moves so that the sliding surface 10 b slides with respect to the second sliding surface 12 b of the driving member 12, and the guided surface moves along the second guiding surface 8 a of the guide member 5. Since the second guide surface 8a of the guide member 5 (die guide 8) is inclined with respect to the pushing direction, chatter vibration does not occur when the movable die 10 moves, and the movable die 10 Along with the movement along the second guide surface 8a, the molding surface 10a changes its position in a direction inclined in the extrusion direction. Thereby, the width of the extruded shape member 50 is sequentially changed. At this time, the ratio of the moving speed of the movable die 10 to the moving speed of the driving member 12 is determined according to the angle formed by the second sliding surface 12b of the driving member 12 and the second guide surface 8a of the guide member 5. Therefore, the moving speed of the movable die 10 can be adjusted by setting the direction of the second sliding surface 12b of the drive member 12 and the direction of the second guide surface of the guide member 5. For this reason, the degree of freedom of the shape of the profile 50 to be extruded can be improved by setting the orientation of the second sliding surface 12b and the second guide surface 8a according to the shape of the extruded profile 50 to be molded. it can. In addition, since chatter vibration due to friction does not occur when the movable die 10 slides, the extruded shape member 50 can be formed with high accuracy.

  In the present embodiment, the drive member 12 is formed with the guide groove 12c extending along the direction of relative movement of the movable die 10, so that a large force is applied to the movable die 10 when the extruded shape member 50 is extruded. Even when it acts, the movement of the movable die 10 can be stabilized.

  In the present embodiment, two drive members 12 and two movable dies 10 are provided, so that the opposing surfaces of the extruded shape member 50 can be changed.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the driving force of the driving source 16 is transmitted to the driving member 12 via the pivot lever 20 and the connecting member 22, but the present invention is not limited to this. For example, the drive member 12 may be coupled to the drive shaft 18 as a configuration in which the drive shaft 18 is linearly driven in the vertical direction.

  Moreover, in the said embodiment, although it was set as the structure which extrudes the rectangular cylindrical shape material 50, it is good also as a structure which replaces this and extrudes a solid shape material.

  In the above embodiment, the left movable die 10 and the right movable die 10 are moved in the same manner to form the extruded shape member 50 having a symmetrical shape. However, the present invention is not limited to this. By moving the left and right movable dies 10 and 10 in different amounts, left and right asymmetric shapes may be formed.

S1 molding space S2 insertion space 2 container 4 stem 5 guide member 6 fixed die 6a through hole 7 holder portion 7a guide hole 7b first guide surface 8 die guide 8a second guide surface 10 movable die 10a molding surface 10b slide surface 10c Guide surface 10d Projection 12 Drive member 12a First sliding surface 12b Second sliding surface 12c Guide groove 14 Drive mechanism 16 Servo motor (drive source)
18 Drive shaft 20 Pivot lever 22 Connecting member 50 Profile 50a Inner hole 51 Parallel part 52 Parallel part 55 Inclined part

Claims (5)

A guide member having a first guide surface and a second guide surface extending in a direction inclined with respect to the direction of the first guide surface and the extrusion direction of the extruded shape member;
A first sliding surface that moves along the first guide surface; and a second sliding surface that extends in a direction inclined with respect to the first sliding surface. A drive member movable along the first guide surface;
The sliding surface slides along the second sliding surface of the driving member according to the movement of the driving member and the second guiding surface of the guide member according to the movement of the driving member. A movable die having a guided surface and a molding surface of the extruded shape formed so as to be along the extrusion direction of the extruded shape;
Extrusion device equipped with.   The extrusion molding apparatus according to claim 1, wherein a guide groove extending along a relative movement direction of the movable die is formed in the drive member. Two each of the first guide surface and the second guide surface are provided,
3. The extrusion molding apparatus according to claim 1, wherein the driving member and the movable die are each provided in two, and a pair of opposed surfaces of the extruded shape member are formed by a molding surface of each movable die.   It is the extrusion shape member extrusion-molded by the extrusion-molding device according to any one of claims 1 to 3, wherein a width in one direction among directions orthogonal to the extrusion direction changes along the extrusion direction. Extruded shape with an inclined part. A molding method for extruding an extruded shape through a molding surface of a movable die,
Driving the drive source to move the drive member in the pushing direction so that the first sliding surface of the drive member is along the first guide surface of the guide member;
In response to the movement of the drive member, the guided surface of the movable die is slid with respect to the second sliding surface of the drive member, and the direction of the first guide surface and the extrusion direction of the extruded shape member Guiding the movable die along the second guide surface of the inclined guide member;
An extrusion molding method for extruding an extruded shape while changing the position of the molding surface of the movable die.