JP2001252961A - Mechanism for cutting extrusion-molded article and extrusion molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism which can cut an extrusion-molded molding being extruded continuously, secure the dimensional precision of the molding by simple structure, and cut the molding promptly. SOLUTION: The molding 3 is pressed to a molding guide passage 21 by a detection roller 22a and a press roller 231. The deflection (chain line) of the molding 3 which is generated between the detection roller 22a and the press roller 231 gives almost no influence to the extrusion molding in the outlet of the extrusion molding machine 10, and the molding condition is unaffected. During the elevation of a cutting edge 232, as shown by a dotted line, since the rise of the cutting end part on the upstream side of the molding 3 with the elevation of the cutting edge 232 is prevented by the press roller 231, the molding 3 is prevented from being hurt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded product cutting mechanism and an extruder, and more particularly to a structure for cutting an extruded product in an extruder that continuously extrudes and extrudes a molded product. .

[0002]

2. Description of the Related Art Generally, in an extrusion molding apparatus, a molding material is continuously molded by extruding through a die having a predetermined shape. As a molded product manufactured using this extrusion molding apparatus, for example, there is a magnet formed by extruding a magnetic powder kneaded with a resin binder such as nylon (trademark) and curing the resin binder. The extruder is usually provided with a cutting mechanism for cutting an extruded product extruded through a die into a predetermined length.

[0003] As a cutting mechanism of a conventional extrusion molding apparatus,
There is an extruder in which a plurality of disc-shaped diamond blades arranged in the extrusion direction of an extruded product are mounted at the outlet of an extruder, and the whole is configured to be able to reciprocate in the extrusion direction of the extruded product. When the extruded product is extruded to some extent, the cutting mechanism simultaneously cuts at a plurality of locations by a diamond blade while moving the entire extruded product at the same speed as the extrusion speed of the extruded product. It is configured to repeat the operation of returning to the position.

Further, as a generally used cutting method, there are various methods using vibration, heat (such as cutting by a laser beam), a water stream, and the like. Instead of cutting, an extruded product is separated by splitting. There are ways. Further, there is also used a mechanism for temporarily stopping the extrusion of the extruder when cutting the extruded product and cutting the extruded product during the stop period.

[0005]

However, in the cutting mechanism of the above-mentioned conventional extrusion molding apparatus, although the working efficiency is enhanced by using a plurality of diamond blades at the same time, the cutting mechanism depends on the abrasion state and dimensional variation of the diamond blades. Since the thickness varies among the blades and the blade interval also varies depending on the mounting accuracy of each diamond blade, the length of each molded product separated by cutting tends to vary. Therefore, it is necessary to adjust the mounting position of the diamond blade with a spacer or the like in order to reduce the dimensional error of each molded product, and furthermore, it is necessary to have a complicated mechanism and to reciprocate the whole in the traveling direction of the extruded product. It is difficult to improve the shape accuracy of the molded product because there is a limit to the operation accuracy, and it is difficult and complicated to manage the mechanism. Further, a certain long cutting time is required, so that productivity is low. There is a problem.

In addition, any of the cutting methods using vibration, heat, and water flow require a large-sized apparatus structure, increase costs, and have a problem in cutting accuracy. In addition, in the separation method by splitting (breaking), there is a problem that the length of a separable molded product is restricted, and that the shape of the fracture surface varies.

Further, when the extrusion operation of the extruder is temporarily stopped at the time of cutting, there is a problem that a node is formed at a portion corresponding to the stop period of the extruded product.

Accordingly, the present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a cutting mechanism for cutting an extruded product which is continuously extruded. It is another object of the present invention to provide a mechanism capable of securing the dimensional accuracy of a molded product with a simple structure and capable of cutting an extruded product quickly.

[0009]

According to the present invention, there is provided an extruded product cutting mechanism for cutting an extruded product extruded by extrusion. It has a molded article guide path extending in the extrusion direction of the extruded article, and molded article cutting means provided with a cutting blade arranged so as to be able to protrude and retract from the extruded article traveling along the molded article guide path. , The molded article cutting means,
A first method of pressing the extruded product toward the molded product guide path
And a second pressing member that presses the extruded product toward the molded product guide path.

According to the present invention, the first pressing member and the second pressing member
Since the extruded product is pressed against the molded product guide path at two points by the pressing member, when the pressed molded product is continuously extruded, the extruded product is cut when the pressed blade is cut by the cutting blade. Even if the movement of the molded product is suppressed at the cutting portion, the extruded product bends between the two pressed portions, so that the continuous extrusion amount of the pressed molded product can be absorbed. As a result, it is not necessary to apply a large extrusion resistance to the extruded portion (the portion where the molding material is extruded from the die) in the extruded product, and it is possible to suppress the occurrence of a defective shape of the extruded product. Therefore, even if the cutting mechanism is fixed, displacement of the cutting position and damage to the extruded product can be reduced without interrupting the extrusion. Further, since the first pressing member is provided on the upstream side of the cutting blade, when the cutting blade separates from the cut portion of the extruded product after cutting the extruded product, the cutting blade is separated from the extruded product together with the separating operation. It is possible to prevent the side portion (this portion is pressed against the cutting blade when continuously extruded) from being greatly turned up in the direction away from the cutting blade. it can.

It is preferable that the first pressing member and the second pressing member are arranged apart from each other in the pushing direction. In addition, it is preferable that the first pressing member is disposed at an upstream position adjacent to the cutting blade, and the second pressing member is disposed at a position further upstream from the first pressing member.

In the present invention, there is provided an extruding speed detecting means for detecting an extruding speed of the extruded product, wherein the second pressing member contacts the extruded product advancing along the molded product guide path. Preferably, the detection roller is a detection roller that rotates in accordance with the movement of the extruded product, and the extrusion speed detection means is configured to detect the extrusion speed of the extruded product based on the rotation of the detection roller. According to this means, since the second pressing member comes into contact with the extruded product and rotates according to its movement, it can be pressed without applying a large load to the extruded product. It also functions as a roller, reducing the number of parts,
The device structure can be further simplified.

In the present invention, the first pressing member includes:
It is preferable that the pressing roller is a pressing roller that contacts the extruded product advancing along the molded product guide path and rotates according to the movement of the extruded product. According to this means, the first pressing member can press without applying a large load to the extruded product.

In the present invention, the molded article cutting means is provided with a driving means for driving the cutting blade, and the driving means is constituted so as to push the cutting blade toward the extruded molded article. And an extruding member configured not to substantially interfere with the cutting blade during a period other than pushing out the cutting blade, and a retreat for urging the cutting blade in a direction to retreat from the extruded product side. Preferably, means are provided. In this case, the cutting blade is pushed out toward the extruded product by the pushing member, and thereafter the cutting blade is returned by the urging force of the retracting means, so that the operating speed of the cutting blade can be increased. At the same time, the time interval between the end point of the feeding operation of the cutting blade and the start point of the return operation can be shortened, so that even when the cutting mechanism is fixed, the cutting position can be shifted and cut without interrupting extrusion molding. The inclination of the surface, damage to the extruded product, and the like can be reduced.

In the present invention, the pushing member is configured to reciprocate in a direction intersecting with the direction in which the cutting blade is driven, and the pushing member is pushed in the middle of one of a forward movement and a backward movement of the pushing member. It is preferable that the member is configured so that the cutting blade is extruded toward the extruded product. In this case, since the cutting blade is configured to be pushed toward the extruded product during the operation of the pushing member, the cutting blade can be operated at high speed without being affected by the acceleration / deceleration characteristics of the pushing member. .

In the present invention, at least one of the cutting blade and the extruding member is brought into contact with a counterpart during one of the forward movement and the backward movement to turn the cutting blade toward the extruded product. For pushing out, comprises an inclined surface facing an intermediate direction between a reciprocating operation direction of the pushing member and a direction in which the cutting blade is driven, and the pushing member is one of the forward movement and the backward movement. Is preferably configured to perform an avoiding operation on the cutting blade.

In the present invention, the pushing member is configured to rotate in a direction to avoid the cutting blade when the pushing member comes into contact with the cutting blade during the other of the forward movement and the backward movement. In addition, it is preferable to provide a posture returning means for urging the pushing member in a direction opposite to the direction of the rotation.

In the present invention, the pushing member and the cutting blade may contact each other in a direction substantially orthogonal to a direction in which the cutting blade is driven, during one of the forward movement and the backward movement. It is preferable to have an abutting contact surface.

Further, the extrusion molding apparatus of the present invention is provided with any one of the above-mentioned extrusion molding cutting mechanisms.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a cutting mechanism for an extruded product and an extruder according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic side view showing the entire configuration of the cutting mechanism of the present embodiment. The extruder of the present embodiment includes a cutting mechanism 20 disposed at the outlet of the extruder 10. The cutting mechanism 20 includes a molded article guide path 21 formed so as to extend along the extrusion direction of the extruded article 3, a molding speed detection unit 22 disposed on the upstream side in the middle of the molded article guide path 21, and And a molded product cutting section 23 arranged downstream of the molding speed detecting section 22.

The molded article guide path 21 is connected to the internal guide path 11 provided inside the extruder 10 so that the guide path is continuous, and has a guide surface for guiding the extruded article 3. , And has a terminal end at a point where it has passed through the molding speed detecting section 22 and the molded article cutting section 23. A discharge chute 24 for receiving the divided molded product and discharging the molded product to a storage section (not shown) is disposed below the end of the molded product guide path 21.

The molding speed detector 22 contacts the long extruded product 3 traveling on the molded product guide path 21 from above.
It has a detection roller 22a rotatably mounted and an elastic body 22b such as a coil spring for pressing the detection roller 22a against the extruded product 3 at a predetermined pressure. When the detection roller 22a pressed against the extruded product 3 rotates with the progress of the extruded product 3, the rotation speed of the detection roller 22a is detected by a detector such as an encoder, so that the traveling speed of the extruded product 3 is increased. (Extrusion speed).

The molded product cutting section 23 includes a pressing roller 231 for pressing the extruded product 3 advancing on the molded product guide path 21 from above, and an extruded product 3 at a position adjacent to the downstream side of the pressing roller 231. And a cutting blade 232 that cuts from above. A suction nozzle 25 is disposed diagonally above the downstream side of the cutting blade 232, and the suction nozzle 25 is connected to an exhaust device (not shown) to remove chips generated when the extruded product 3 is cut by the cutting blade 232. It is designed to suck. The molded product 3a cut to a predetermined length by the cutting blade 232 eventually falls from the molded product guide path 21 onto the discharge chute as the extruded product 3 advances, and is discharged.

FIG. 2 is a side view of the molded product cutting portion 23, and FIG. 3 is a front view of the molded product cutting portion 23 (a surface viewed from the downstream side of the molded product guide path 21 is a front surface). . In the molded product cutting section 23, a plate-shaped fixing member 233 fixed above the molded product guide path 21 is provided so as to straddle the molded product guide path 21. A plate-like support member 234 is attached to the fixing member 233 so as to be able to move up and down along the plate surface of the fixing member 233. The support member 234 has a screw shaft 2
35 is fixed at its lower end, and the screw shaft 235 is
33, the support member 234 is fixed to the fixing member 233 by rotating the screw shaft 235.
It can be moved up and down with respect to.

A drive source 2381 composed of a plunger-type electromagnetic solenoid or the like is fixed to the support member 234.
The drive shaft 2382 of the drive source 2381 is
It is fixed to the driven member 2384 via 83. The driven member 2384 is guided in a horizontal direction with respect to the support member 234 by a linear guide 234a. A pushing member 2385 is rotatably attached to the driven member 2384. The pushing member 2385 has its rotation range limited by a stopper 2384a provided on the driven member 2384 so that the pushing member 2385 does not turn from the state shown in the counterclockwise direction in FIG. However, the pushing member 238
5 is configured to be rotatable clockwise in the figure from the state shown in the figure. The other end of an elastic member 2386 such as a coil spring having one end fixed to the driven member 2384 is connected to a position near the upper end of the pushing member 2385 in the drawing. By the elastic member 2386, the pushing member 2385 is always urged in a counterclockwise rotation direction in the drawing.

At the lower end of the pushing member 2385, FIG.
A slanting surface 2385a facing obliquely downward on the left side in the drawing is formed, and a vertical surface 23 facing rightward in the drawing.
85b are formed.

Below the driven member 2384, a support member 2 is provided.
Cutting support 23 mounted to be able to move up and down with respect to 34
A driven member 2387 projecting below the pushing member 2385 is provided above the cutting support 2388.
Has been fixed. The cutting blade 232 is fixed to the cutting support 2388. Cutting support 2388
Is connected to the other end of an elastic member 2389 composed of a coil spring or the like having one end attached to the support member 234, and the cutting support 2388 is constantly urged upward by the elastic member 2389.

At the upper end of the driven member 2387, an inclined surface 2387a facing obliquely upward and rightward in FIG. 3 is formed, and a vertical surface 2387 facing leftward in FIG.
b is formed.

The cutting edge 232a of the cutting blade 232 is formed in a sectional shape of the extruded product 3, that is, in a convex arc shape corresponding to an arc-shaped cross section. Also, the cutting edge 2 of the cutting blade 232
32a is an inclined blade surface 232 on the downstream side of the molded article guide path 21.
Due to the formation of b, the thickness is gradually reduced toward the tip.

On the other hand, as shown in FIG. 3, the molded article guide path 21 is provided on a frame 210 on a vibration absorber 21 such as a vibration-proof rubber.
A V-shaped groove having a V-shaped cross section is formed on the upper surface of the base 211 fixed through the support 5, and the support guide member 212 is housed so as to fit in the V-shaped groove. This support guide member 212
Is held on the base by a holding frame 213 attached to the base 211. A guide member 214 made of a soft material to the extent that the cutting edge 232a of the cutting blade 232 is not damaged is fixed to the support guide member 212. In the present embodiment, since the extruded product 3 is formed in a gutter shape having an arc-shaped cross section, the surface of the guide member 214 is provided with an arc-shaped cross section corresponding to the gutter shape which is the shape of the extruded product 3. A guide groove 214a is formed. The extruded product 3 is extruded into the guide groove 214a.

An attachment support member 216 is attached and fixed to both sides of the base body 211.
The arm member 236 is rotatably attached to the upper end of the arm. Further, the pressing roller 231 is rotatably supported at the tip of the arm member 236.
An elastic support portion 237 including an elastic member such as a coil spring is connected to the upstream end of the arm member 236. Here, a shaft member is fixed to the arm member 236, and since this shaft member is constantly urged upward by the elastic member, the arm member 236 always acts to press the pressing roller 231 downward with a predetermined pressure. .

In the present embodiment, the extrusion speed of the extruded product 3 is detected by the rotation of the detection roller 22a in the molding speed detection unit 22, and a control device (not shown) such as a programmable controller or A microprocessor unit or the like) operates the molded product cutting section 23 to cut the extruded product 3. That is, if the extrusion speed increases, the interval between cutting operations by the molded article cutting section 23 is shortened, and if the extrusion speed decreases, the interval between cutting operations is increased. For example, when cutting the extruded product 3 to a fixed length, if the extrusion speed is constant, the cutting operation is performed at a constant time interval, and if the extrusion speed increases or decreases, the time interval of the cutting operation is increased. Shorten or extend.

As a method for controlling the cutting operation by the molded article cutting section 23, as shown in FIG. 1, a detecting device 26 comprising an optical sensor or the like is arranged near the end of the molded article guide path 21. The extruded product 3 is detected by the detection device 26
When the leading end is detected, the control device may operate the molded article cutting section 23 to cut the molded article.
In this case, the molding speed detector 22 is used for monitoring the extrusion speed of the extruded product 3.

In the molded article cutting section 23, first, the driving source 2 shown in FIG.
The drive shaft 2382 is retracted by the operation of the driven member 381, and the driven member 2384 moves to the left side in the drawing via the connecting member 2383 accordingly. As the driven member 2384 moves, the pushing member 2385 also moves to the left in the drawing, and the pushing member 2385 moves.
Inclined surface 2385a of the driven member 2387
Collision with 7a. At this time, since the pushing member 2385 is prevented from rotating counterclockwise in the figure by the stopper 2386, the inclined surface 2385a is not
a to be pushed away, the driven member 2387
It descends with 388. And the cutting support 2388
Is also lowered, so that the cutting blade 232 cuts the extrusion 3 below.

When the pushing member 2385 pushes the driven member 2387 downward, passes above the driven member 2387, and moves to the left in the drawing (shown by a dashed line in the drawing), the cutting support 2388 and the cutting blade 232 are pushed out. It is released from the stress from the member 2385 and starts to return upward by the elastic force of the elastic member 2389.

Next, the driving source 2381 causes the driving shaft 2382 to protrude in the opposite direction to the above operation, and the driven
The extruding member 2385 starts to return to the right side in the figure together with 384. At this time, since the driven member 2387 has already risen or is in the process of rising, the vertical surface 2385b at the tip of the pushing member 2385 that has begun to return is moved by the driven member 2387.
Collides with the vertical surface 2387b at the tip of. At this time, since the impact exerted on the driven member 2387 from the pushing member 2385 is applied in the horizontal direction, the driven member 2387 and the cutting support 2388 and the cutting blade 232 integrated therewith are applied.
The lifting operation or the vertical position is hardly affected. Further, since the pushing member 2385 is attached to the driven member 2384 so as to be rotatable clockwise in the figure, the vertical surface 2385b is
7b, the push-out member 2385 rotates clockwise as shown by a two-dot chain line in the reaction, and the driven member 23
It passes over the driven member 2387 so as to avoid the 87. Finally, the pushing member 2385 returns to the initial position on the right side in the figure, and rotates in the opposite direction to the above-described rotating direction by the elastic force of the elastic member 2386 to return to the initial position, as shown by the solid line in the figure. become.

Here, as the drive source 2381, for example, an electromagnetic solenoid configured so that the drive shaft 2382 is retracted during the energization period and the drive shaft 2382 is returned by elastic force or the like when the energization is released is used. be able to. In this case, the energization time is about 1 second.
Even if the energizing time (or energizing cycle) is long or the response speed (operation start time) of the operation of the drive shaft 2382 is low, the descent speed and the ascent of the cutting blade 232 are increased by the above-described mechanism. Since the speed is determined by the retraction speed of the drive shaft 2382 and the elastic force of the elastic member 2389, the operation of the cutting blade can be accelerated without being greatly affected by the operation characteristics of the drive source 2381.

In this embodiment, for example, when the extruded product 3 is moving at a predetermined speed from the right side of FIG. 1 to the left side of the figure, the cutting blade 232 descends from above, and the cutting edge 232a contacts the surface of the extruded product 3. After that, when the extruded product 3 further descends and descends by the thickness of the extruded product 3, the extruded product 3 is completely cut. And after that, the cutting blade 232 rises again,
It separates from the extrusion 3.

At this time, even while the cutting blade 232 is cutting the extruded product 3, the extruded product 3 is moving toward the left side in the drawing, so that the cutting period (when the cutting blade 3 is actually During the period in which the product 3 is being advanced), it gradually moves to the left side in the figure. Therefore, strictly speaking, the cutting blade 232 is slightly bent to the left side in the figure by the extruded product 3 on the upstream side, and at the same time, the extruded product 3 on the upstream side is pushed back to the right side in the figure by the cutting blade 232. At this time, the cutting blade 232 is provided only on the downstream side, that is, only on the left blade surface shown in FIG. 2, to form the inclined blade surface 2 for forming the blade edge 232a.
32b is formed, and the upstream side, that is, the blade surface on the right side in the drawing is formed substantially perpendicularly, so that the inclined surface is also formed on the upstream blade surface, or only on the upstream blade surface. Since the amount of the cutting blade 232 pushed and bent to the downstream side and the amount of the extruded product 3 on the upstream side pushed back to the upstream side can both be reduced as compared with the case where it is formed,
The cutting position of the extruded product 3 can be made more accurate,
Further, the cut surface can be formed more vertically, and furthermore, damage to the extruded product 3 can be further reduced.

As described above, during the cutting operation of the extruded product 3 by the cutting blade 232, the movement of the extruded product 3 in the extrusion direction is hindered by the cutting blade 232, so that the extruded product 3 located on the upstream side of the cutting portion is not moved. A compression stress is applied to the molded product 3. This compressive stress is absorbed to some extent by the deflection of the extruded product 3. On the other hand, in the present embodiment, the extruded product 3 is a detection roller 22 arranged at the exit of the extruder 10.
a and the pressing roller 231 adjacent to the cutting blade 232, the pressing force is pressed against the molded article guide path 21. Therefore, the compressive stress is generated between the pressing part by the detection roller 22a and the pressing part by the pressing roller 231. It bends away from the molded article guide path 21 and bends in an arc shape between both pressing parts as shown by a dashed line in FIG.

At this time, the extruder 10 is connected to the detection roller 2
2A, the deflection of the extruded product 3 generated between the detection roller 22a and the pressing roller 231 hardly affects the unillustrated outlet of the extruder 10. There is almost no influence on the molding state of molding.

Next, after the cutting blade 232 descends and completely cuts the extruded product 3, the cutting blade 232 starts to rise.
Even during the rising period of the cutting blade 232, the cutting blade 232
Until is completely separated from the extruded product 3 on the upstream side, the movement of the extruded product 3 on the upstream side is continuously prevented. Accordingly, even during this time, the degree of curvature of the extruded product 3 shown by the dashed line in FIG. 4 increases as described above.

Also, during the rising period of the cutting blade 232, as shown by the dotted line in FIG. 5, the cutting edge on the upstream side of the extruded product 3 tends to be turned upward as the cutting blade 232 is raised. At this time, the pressing roller 231 adjacent to the upstream side of the cutting blade 232 prevents the cut end of the extruded product 3 from being wound up, so that the extruded product 3 can be prevented from being seriously damaged.

In order to further enhance the above-described effects, FIG.
It is preferable that the cutting blade 232 itself shown in (1) is installed with a slight inclination toward the downstream side toward the extruded product 3, and is lowered in the inclination direction. In this manner, the extruded product 3 that advances to the left in the figure is cut from the upstream side and cuts obliquely downstream, so that the amount of movement of the extruded product 3 by the cutting blade 232 during the above-described cutting period is reduced. It can be reduced by the amount of cutting obliquely, and as a result, the cut surface of the extruded product 3 can be formed closer to the vertical surface. Further, similarly to the above, damage to the extruded product 3 can be further reduced.

Here, the inclination angle of the cutting blade 232 with respect to the perpendicular is 1 to 1 in the configuration of the cutting mechanism of the present embodiment.
The angle is preferably in the range of 5 degrees, and particularly preferably 2 to 3 degrees. If the ratio is below these ranges, the above effects cannot be obtained. If the ratio exceeds these ranges, defective cutting may occur.

In this embodiment, the pushing member 2385 is moved in the horizontal direction by the operation of the driving source 2381, and the pushing member 2385 is moved in the middle of the forward movement.
87, the cutting blade 232 is lowered, and thereafter, the cutting blade 232 is raised by the elastic force of the elastic member 2389, and the returning operation of the pushing member 2385 is performed by the cutting blade 23.
2 so as not to hinder the rise of the pushing member 2
The cutting blade 232 can be moved up and down very quickly without being affected by the acceleration / deceleration characteristics in the reciprocating operation of the cutting blade 385, and the time lag between the end of the lowering operation of the cutting blade 232 and the start of the ascending operation. Can be reduced.

FIG. 6A shows the cutting blade 232 of this embodiment.
FIG. 6 (b) shows a graph showing the ascending and descending operation. FIG. 6 (b) shows a cutting mechanism in which a cutting blade is fixed to a vertical drive shaft installed in a vertical position of an electromagnetic solenoid (the same as the drive source 2381). 4 is a graph showing the raising and lowering operation of the cutting blade in the case. As can be seen from these graphs, in the present embodiment, in particular, the time between the end point of the lowering operation of the cutting blade and the start point of the ascending operation is extremely small, so that the cutting operation period (the cutting blade The period S1 during which the extruded product is in contact with the extruded product is significantly shorter than the conventional cutting operation period S2. In addition, the period of elevating operation of the cutting blade (a period from the time when the cutting blade starts to descend to the time when the ascent is completed) T
1 is also shorter than the conventional elevating operation period T2. In the present embodiment, the vertical movement speed of the cutting blade itself is also higher than the operating speed of the cutting blade directly connected to the drive source, so that the cutting operation period S1 is significantly reduced as compared with the case of a normal cutting mechanism. It has become possible.

It should be noted that the extruded product cutting mechanism and the extruded molding apparatus of the present invention are not limited to the above illustrated examples, and that various modifications can be made without departing from the gist of the present invention. Of course.

[0049]

As described above, according to the present invention,
Since the extruded product is pressed against the molded product guide path at two places by the first pressing member and the second pressing member, when the pressed molded product is continuously extruded, the extruded product is pressed by the cutting blade. Even when the movement of the extruded product is suppressed at the cutting portion when the molded product is cut, the extruded product bends between the two pressed portions to absorb the continuous extrusion amount of the pressed molded product. . As a result, it is not necessary to apply a large extrusion resistance to the extruded portion (the portion where the molding material is extruded from the die) in the extruded product, and it is possible to suppress the occurrence of a defective shape of the extruded product. Therefore, even if the cutting mechanism is fixed, displacement of the cutting position and damage to the extruded product can be reduced without interrupting the extrusion. In addition, the first on the upstream side of the cutting blade
When the cutting blade separates from the cutting portion of the extruded product after cutting the extruded product, the cutting member separates from the cutting portion of the extruded product and the upstream portion of the extruded product (this portion is continuously extruded). When it is formed, it is in a state of being pressed against the cutting blade.) Can be prevented from being greatly rolled up in the separating direction of the cutting blade.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an overall configuration of an embodiment of a cutting mechanism and an extrusion apparatus of an extruded product according to the present invention.

FIG. 2 is a side view of a molded product cutting section in the embodiment.

FIG. 3 is a front view of a molded product cutting section in the embodiment.

FIG. 4 is a schematic configuration diagram showing a curved shape of the extruded product 3 during cutting in the same embodiment by a dashed line.

FIG. 5 is an enlarged side view of a graph showing a curved shape (dashed line) of the extruded product 3 during cutting and a rolled-up state (dotted line) of the extruded product 3 due to rising of a cutting blade in the embodiment.

FIG. 6 is a graph (a) showing the raising / lowering operation of the cutting blade in the same embodiment and a graph (b) showing the raising / lowering operation of the cutting blade when driven directly by an electromagnetic solenoid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Extrusion machine 20 Cutting mechanism 21 Mold guideway 22 Molding speed detecting part 23 Mold cutting part 231 Press roller 232 Cutting blade 232a Blade tip 232b Inclined blade surface 2381 Drive source 2385 Extruded member 2385a Inclined surface 2385b Vertical surface 2386, 2389 Elasticity Member 2387 Driven member 2387a Inclined surface 2387b Vertical surface 2388 Cutting support

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Noboru Sakurai 3-3-5 Yamato, Suwa City, Nagano Prefecture Inside Seiko Epson Corporation (72) Inventor Naoto Takano 3-5-5 Yamato, Suwa City, Nagano Prefecture Seiko Epson F term in reference (reference) 3C027 JJ01 JJ08 JJ12 JJ14 JJ18 4F207 AA29 AC04 AM10 AP07 AP08 AQ01 AR07 AR11 KA01 KM05 KM16 KM20 KW23

Claims (9)

[Claims] 1. An extruded product cutting mechanism for cutting an extruded product extruded by extrusion, comprising: a molded product guide path extending in an extrusion direction of the extruded product; A molded article cutting means having a cutting blade for cutting the advancing molded article, wherein the molded article cutting means presses the extruded article toward the molded article guide path. A cutting mechanism for an extruded product, comprising: a pressing member; and a second pressing member for pressing the extruded product toward the molded product guide path. 2. The extruded product according to claim 1, further comprising an extruding speed detecting means for detecting an extruding speed of the extruded product, wherein the second pressing member moves along the molded product guide path. A detection roller that rotates in accordance with the movement of the extruded product when the extruded product is moved, and wherein the extrusion speed detection means is configured to detect the extrusion speed of the extruded product based on the rotation of the detection roller. A cutting mechanism for extruded products. 3. The pressing device according to claim 1, wherein the first pressing member contacts the extruded product advancing along the molded product guide path and rotates as the extruded product moves. A cutting mechanism for an extruded product, which is a roller. 4. The molded product cutting means according to claim 1, further comprising: a driving means for driving the cutting blade, wherein the driving means includes: An extruding member configured to extrude toward an extruded product, and configured not to substantially interfere with the cutting blade except during a period in which the cutting blade is extruded, and extruding the cutting blade. And a retraction means for urging in a direction to retreat from the molded product side. 5. The pushing member according to claim 4, wherein the pushing member is configured to reciprocate in a direction intersecting with a direction in which the cutting blade is driven. Wherein the cutting blade is extruded toward the extrusion by the extrusion member. 6. The extrusion molding according to claim 5, wherein at least one of the cutting blade and the pushing member abuts on the other side during the one of the forward movement and the backward movement. For extruding toward an article, an inclined surface facing an intermediate direction between a reciprocating operation direction of the pushing member and a direction in which the cutting blade is driven is provided, and the pushing member performs the forward movement and the backward movement. A cutting mechanism for an extruded product, wherein the cutting mechanism is configured to perform an avoiding operation on the cutting blade on one of the other sides. 7. The cutting member according to claim 6, wherein the pushing member rotates in a direction to avoid the cutting blade when the pushing member comes into contact with the cutting blade during the other of the forward movement and the backward movement. A cutting mechanism for extruded products, comprising a posture returning means for urging the pushing member in a direction opposite to the direction of the rotation. 8. The apparatus according to claim 7, wherein the pushing member and the cutting blade move in a direction substantially orthogonal to a direction in which the cutting blade is driven during one of the forward movement and the backward movement. A cutting mechanism for extruded products, comprising a contact surface that abuts each other. 9. An extrusion molding apparatus comprising the extruded article cutting mechanism according to claim 1. Description: