JP3982141B2 - Extrusion product cutting mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an extrusion-molded product cutting mechanism and an extrusion-molding apparatus, and more particularly to a structure for cutting an extrusion-molded product in an extrusion-molding apparatus that performs molding while continuously extruding a molded product.
[0002]
[Prior art]
In general, in an extrusion molding apparatus, a molding material is continuously molded by extruding it through a die having a predetermined shape. As a molded article 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 extrusion apparatus 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, a plurality of disk-shaped diamond blades arranged in the extrusion direction of the extruded product are mounted at the exit of the extruder main body, and the whole reciprocates in the extrusion direction of the extrusion molded product. Some are configured to be operable. When the extruded product is extruded to some extent, the cutting mechanism performs cutting at a plurality of locations simultaneously with a diamond blade while moving at the same speed as the extrusion speed of the extruded product in the extrusion direction. The operation of returning to the position is repeated.
[0004]
Moreover, as a cutting method generally used, there are various methods using vibration, heat (cutting by laser light, etc.), water flow, etc., and there is also a method of separating an extrusion-molded product by folding instead of cutting. . Furthermore, a mechanism is also used in which the extrusion of the extruder is temporarily stopped when the extruded product is cut, and the extruded product is cut during the stop period.
[0005]
[Problems to be solved by the invention]
However, in the cutting mechanism of the conventional extrusion molding apparatus, the work efficiency is improved by using a plurality of diamond blades at the same time, but there is a variation in thickness between the blades due to the wear state and dimensional variation of the diamond blades. In addition, since the blade spacing varies depending on the mounting accuracy of each diamond blade, the dimensional variation tends to occur in the length of each molded product separated by cutting. Therefore, in order to reduce the dimensional error of each molded product, it is necessary to adjust the mounting position of the diamond blade with a spacer or the like, and the mechanism is complicated, and it is also necessary to reciprocate the whole in the traveling direction of the extruded product. Therefore, it is difficult to improve the shape accuracy of the molded product, for example, there is a limit to the operation accuracy, and the management of the mechanism is difficult and cumbersome. Moreover, a long cutting time is required, so the productivity is low. There is a problem.
[0006]
In addition, all of the cutting methods using vibration, heat, and water flow have a large apparatus structure and are expensive, and there is a problem in terms of cutting accuracy. In addition, the separation method by folding (breaking) has a problem that the length of the separable molded product is restricted or there is a variation in the shape of the fractured surface.
[0007]
Furthermore, when the extrusion operation of the extruder is temporarily stopped at the time of cutting, there is a problem in that a node is formed in a portion corresponding to the stop period in the extruded product.
[0008]
Therefore, the present invention solves the above-mentioned problems, and the problem is that the cutting mechanism that cuts the extruded product that is continuously extruded can be cut even during the continuous extrusion operation of the molded product. An object of the present invention is to provide a mechanism capable of ensuring the dimensional accuracy of a molded product with a simple structure and capable of quickly cutting an extruded product.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the cutting mechanism of the extrusion molded product of the present invention is a molding mechanism that extends in the extrusion direction of the extruded product in the cutting mechanism of the extruded product for cutting the extruded product extruded by extrusion molding. An article guide path, a cutting blade for cutting the extrusion molded article that travels along the molded article guide path, and a drive means for driving the cutting blade, and facing the extrusion direction of the cutting blade. An inclined blade surface is formed only on the surface that has been formed.
[0010]
According to this invention, the cutting blade is provided with the inclined blade surface for forming the blade edge only on the surface facing the extrusion direction, so that the surface facing the upstream side of the molded article guide path has the inclined blade. Because the surface is not formed, compared to the case where the inclined blade surface is also formed on the upstream surface or only on the upstream surface, it is caused by the extrusion amount of the extruded product during cutting. The degree of mutual pressing between the cutting blade and the upstream extrusion product can be reduced. Therefore, even when the cutting mechanism is fixed, it is possible to reduce the shift of the cutting position, the inclination of the cut surface, the damage of the extruded product, etc. without interrupting the extrusion molding.
[0011]
In this invention, it is preferable that the said cutting blade is comprised so that it may pay | feed out to the said diagonal direction toward the said extrusion molded product. According to this means, it is possible to further reduce the deviation of the cutting position, the inclination of the cut surface, the damage of the extruded product, and the like.
[0012]
In the present invention, the drive means is configured to extrude the cutting blade toward the extrusion-molded product, and does not substantially interfere with the cutting blade except during a period of extruding the cutting blade. It is preferable that an extruding member configured as described above and an evacuating means for urging the cutting blade in a direction to evacuate the cutting blade from the extrudate side. According to this means, the cutting blade can be fed out by extruding the extruded blade with the extruded member, and the extruded member does not substantially interfere with the cutting blade except during the extrusion period. Since the cutting blade is retracted from the extruded product by the retracting means that urges the cutting blade in the retracting direction, compared with the case where the cutting blade is directly driven by a solenoid, a hydraulic cylinder, etc. Since it is possible to shorten the time until the evacuation operation is started, the cutting blade can be moved up and down more quickly, and the displacement of the cutting position due to the continuous extrusion amount of the molded product during the cutting operation can be reduced. Inclination, damage to extruded products, etc. can be reduced.
[0013]
Next, another extrusion molded product cutting mechanism of the present invention is an extruded product cutting mechanism for cutting an extruded product extruded by extrusion molding, and a molded product guide extending in the extrusion direction of the extruded molded product. A cutting blade for cutting the extruded product that travels along the molded product guide path, and a driving means for driving the cutting blade. The driving means includes the cutting blade An extrusion member that is configured to extrude toward the extruded product and that does not substantially interfere with the cutting blade except for a period during which the cutting blade is extruded, and the cutting blade is extruded. Retracting means for biasing in the direction of retreating from the molded product side is provided.
[0014]
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 of the feeding operation of the cutting blade and the start of the return operation can be shortened, so that even if the cutting mechanism is fixed, the cutting position shifts and cuts without interrupting extrusion molding. It is possible to reduce the inclination of the surface and the damage of the extruded product.
[0015]
In the present invention, the push-out member is configured to reciprocate in a direction intersecting a direction in which the cutting blade is driven, and the push-out member moves the push-out member in the middle of either the forward path operation or the return path operation. It is preferable that the cutting blade is configured to be extruded toward the extruded product. In this case, since the cutting blade is configured to be extruded toward the extruded product during the operation of the extrusion member, the cutting blade can be operated at high speed without being affected by the acceleration / deceleration characteristics of the extrusion member. .
[0016]
In the present invention, at least one of the cutting blade and the pushing member is brought into contact with the other party in the middle of either the forward path operation or the backward path operation to push the cutting blade toward the extruded product. An inclined surface facing an intermediate direction between the reciprocating direction of the push-out member and the protruding and retracting direction of the cutting blade, and the push-out member is the cutting blade in one of the forward pass operation and the return pass operation It is preferable that the apparatus is configured to perform an avoidance operation for the above.
[0017]
In the present invention, the pusher member is configured to rotate in a direction to avoid the cutting blade when contacting the cutting blade during the other operation of the forward path operation and the backward path operation. It is preferable that posture returning means for urging the pushing member in a direction opposite to the direction of rotation is provided.
[0018]
In the present invention, the push-out member and the cutting blade include contact surfaces that contact each other in a direction substantially perpendicular to the protruding and retracting direction of the cutting blade during the operation of either the forward path operation or the backward path operation. It is preferable.
[0019]
In this invention, it is preferable to provide the pressing member for pressing the said extrusion molded product to the said molded product guide path in the adjacent position upstream from the cutting position by the said cutting blade.
[0020]
Moreover, the extrusion molding apparatus of this invention is equipped with the cutting mechanism of one of the said extrusion molded products.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of an extrusion molded product cutting mechanism and an extrusion molding apparatus 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 overall configuration of the cutting mechanism of the present embodiment. In the extrusion molding apparatus of this embodiment, the cutting mechanism 20 arrange | positioned at the exit of the extrusion molding machine 10 is provided. The cutting mechanism 20 includes a molded product guide path 21 formed so as to extend along the extrusion direction of the extrusion molded product 3, and a molding speed detection unit 22 disposed on the upstream side of the molded product guide path 21. And a molded product cutting part 23 arranged on the downstream side of the molding speed detecting part 22.
[0022]
The molded product guide path 21 is connected to the internal guide path 11 provided inside the extrusion molding machine 10 so that the guide path is continuous, and includes a guide surface for guiding the extruded product 3. It has a terminal end after passing through the molding speed detection unit 22 and the molded product cutting unit 23. A discharge chute 24 for receiving the divided molded product and discharging the molded product in a housing (not shown) is disposed below the end portion of the molded product guide path 21.
[0023]
The molding speed detection unit 22 detects a detection roller 22a that comes into contact with the long extrusion molded product 3 traveling on the molded product guide path 21 from above, and presses the detection roller 22a against the extrusion molded product 3 with a predetermined pressure. And an elastic body 22b such as a coil spring. Then, when the detection roller 22a pressed against the extruded product 3 rotates with the progress of the extruded product 3, the amount of rotation of the detection roller 22a is detected by a detector such as an encoder, whereby the traveling speed of the extruded product 3 It is configured to measure (extrusion speed).
[0024]
Further, the molded product cutting unit 23 presses the extruded molded product 3 traveling on the molded product guide path 21 from above, and presses the extruded molded product 3 from above at a position adjacent to the downstream side of the pressed roller 231. A cutting blade (cutter) 232 for cutting. The suction nozzle 25 is disposed obliquely above the downstream side of the cutting blade 232, and this suction nozzle 25 is connected to an exhaust device (not shown), and chips generated when the extruded product 3 is cut by the cutting blade 232 are removed. It comes to suck. The molded product 3a cut to a predetermined length by the cutting blade 232 eventually falls onto the discharge chute from the molded product guide path 21 as the extruded product 3 advances, and is discharged.
[0025]
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 seen from the downstream side of the molded product guide path 21 is a front surface). The molded product cutting part 23 is provided with a plate-like fixing member 233 fixed above the molded product guide path 21 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 movable up and down along the plate surface of the fixing member 233. The lower end of the screw shaft 235 is fixed to the support member 234. The screw shaft 235 is indirectly screwed to the fixing member 233, and the screw shaft 235 is rotated, so that the support member 234 is fixed to the fixing member 233. On the other hand, it can be moved up and down.
[0026]
A driving source 2381 composed of a plunger type electromagnetic solenoid or the like is fixed to the support member 234, and a driving shaft 2382 of the driving source 2381 is fixed to the driven member 2384 via a connecting member 2383. The driven member 2384 is guided in the horizontal direction with respect to the support member 234 by a linear guide 234a. An extrusion member 2385 is rotatably attached to the driven member 2384. The push-out member 2385 has a rotation range limited by a stopper 2384a provided on the driven member 2384 so that the push-out member 2385 does not turn counterclockwise in FIG. However, the pushing member 2385 is configured to be rotatable clockwise from the illustrated state. Further, the other end of an elastic member 2386 such as a coil spring whose one end is fixed to the driven member 2384 is connected to a portion of the pushing member 2385 near the upper end in the drawing. By this elastic member 2386, the pushing member 2385 is always urged in the counterclockwise direction of rotation shown in the drawing.
[0027]
At the lower end portion of the pushing member 2385, an inclined surface 2385a facing obliquely downward on the left side in FIG. 3 is formed, and a vertical surface 2385b facing rightward in the drawing is formed.
[0028]
Below the driven member 2384 is disposed a cutting support 2388 attached to the support member 234 so as to be movable up and down. A driven member 2387 protruding below the push-out member 2385 is disposed above the cutting support 2388. It is fixed. Further, the cutting blade 232 is fixed to the cutting support 2388. The cutting support 2388 is connected to the other end of an elastic member 2389 made of a coil spring or the like with one end attached to the support member 234, and the cutting support 2388 is always urged upward by the elastic member 2389.
[0029]
At the upper end of the driven member 2387, an inclined surface 2387a is formed, which is directed obliquely upward to the right in the drawing in FIG. 3, and a vertical surface 2387b is formed that is directed to the left in the drawing.
[0030]
4A, the cutting edge 232a of the cutting blade 232 is formed in a convex arc shape corresponding to the cross-sectional shape of the extruded product 3, that is, the arc-shaped cross section. Further, as shown in FIG. 4B, the cutting edge 232a of the cutting blade 232 is gradually thinned toward the tip by forming the inclined blade surface 232b on the downstream side of the molded article guide path 21. Yes.
[0031]
On the other hand, as shown in FIG. 3, the molded product guide path 21 has a V-shaped V-shaped cross section formed on the upper surface of the base body 211 fixed on the frame 210 via a vibration absorber 215 such as an anti-vibration rubber. The support guide member 212 is accommodated so as to fit in the V groove. The 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 is fixed to the support guide member 212 to such an extent that the cutting edge 232a of the cutting blade 232 is not damaged. In this embodiment, since the extruded product 3 is formed in a bowl 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 bowl shape that is the shape of the extrusion molded product 3. A guide groove 214a is formed. The extruded product 3 is pushed into the guide groove 214a.
[0032]
Further, attachment support members 216 are attached and fixed to both side portions of the base body 211, and an arm member 236 is rotatably attached to the upper end portion of the attachment support member 216. 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 portion of the arm member 236. Here, since the shaft member is fixed to the arm member 236, and this shaft member is always biased upward by the elastic member, the arm member 236 always acts to press the pressing roller 231 downward with a predetermined pressure. .
[0033]
In the present embodiment, the extrusion speed of the extrusion-molded product 3 is detected by the rotation of the detection roller 22a in the molding speed detector 22, and a control device (not shown) (for example, a programmable controller or a microprocessor unit) is detected according to the extrusion speed. Etc.) operate the molded product cutting section 23 to cut the extruded molded product 3. That is, if the extrusion speed increases, the interval of the cutting operation by the molded product cutting unit 23 is shortened, and if the extrusion speed decreases, the interval of the cutting operation is increased. For example, when the extruded product 3 is cut to a certain 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.
[0034]
Further, as a method for controlling the cutting operation by the molded product cutting unit 23, a detection device 26 including an optical sensor is disposed in the vicinity of the end portion of the molded product guide path 21 as shown in FIG. When the front end portion of the extrusion molded product 3 is detected by H.26, the molded product cutting unit 23 may be operated by the control device to be cut. In this case, the molding speed detection unit 22 is used for monitoring the extrusion speed of the extruded product 3.
[0035]
In the molded product cutting unit 23, based on the control signal from the above-described control device, first, the drive source 2381 shown in FIG. 3 is operated and the drive shaft 2382 is drawn, and the driven member 2384 is connected via the connection member 2383 accordingly. Move to the left side of the figure. As the driven member 2384 moves, the pushing member 2385 also moves to the left in the figure, and the inclined surface 2385a of the pushing member 2385 collides with the inclined surface 2387a of the driven member 2387. At this time, since the pushing member 2385 is prevented from rotating counterclockwise by the stopper 2386, the inclined surface 2385a pushes the inclined surface 2387a as it is, so that the driven member 2387 is lowered together with the cutting support 2388. Then, the cutting blade 232 attached to the cutting support 2388 is also lowered, so that the cutting blade 232 cuts the lower extruded product 3.
[0036]
When the pushing member 2385 pushes the driven member 2387 downward, passes over the driven member 2387, and moves to the left side in the figure (shown by a dashed line in the figure), the cutting support 2388 and the cutting blade 232 are removed from the pushing member 2385. It is released from the stress and starts to return upward by the elastic force of the elastic member 2389.
[0037]
Next, the drive source 2381 causes the drive shaft 2382 to protrude in the opposite manner to the above operation, and along with this, the pushing member 2385 starts to return to the right side in the drawing. At this time, since the driven member 2387 has already risen or is in the process of rising, the vertical surface 2385b of the tip of the pushing member 2385 that has started to return collides with the vertical surface 2387b of the tip of the driven member 2387. At this time, the impact applied to the driven member 2387 from the pushing member 2385 is applied in the horizontal direction, so that the driven member 2387 and the cutting support 2388 and the cutting blade 232 integrated with the driven member 2387 are moved upward or downward. It is designed to have little effect. Further, since the pushing member 2385 is attached to the driven member 2384 so as to be rotatable in the clockwise direction in the drawing, when the vertical surface 2385b collides with the vertical surface 2387b, the pushing member 2385 is moved to the two-dot chain line in the drawing by the reaction. As shown, it rotates clockwise and passes over the driven member 2387 so as to avoid the driven member 2387. Finally, the pushing member 2385 returns to the initial position on the right side of the figure, and is rotated in the direction opposite to the above rotation 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.
[0038]
Here, for example, an electromagnetic solenoid configured such that the drive shaft 2382 is pulled in during the energization period and the drive shaft 2382 is restored by an elastic force or the like when the energization is released can be used as the drive source 2381. . In this case, the energization time is about 1 second. Thus, even if the energization time (or energization cycle) is long or the response speed (operation start point) of the operation of the drive shaft 2382 is slow, the lowering speed and ascent of the cutting blade 232 are increased by the mechanism described above. Since the speed is determined by the pull-in speed of the drive shaft 2382 and the elastic force of the elastic member 2389, the operation of the cutting blade can be speeded up without being significantly affected by the operation characteristics of the drive source 2381.
[0039]
In the present embodiment, as shown in FIG. 4B, for example, when the extruded product 3 is moving at a predetermined speed from the right side to the left side in the drawing, the cutting blade 232 descends from above and is indicated by a one-dot chain line in the drawing. Further, when the blade edge 232a comes into contact with the surface of the extruded product 3 and further descends by the thickness of the extruded product 3, the extruded product 3 is completely cut. Thereafter, the cutting blade 232 moves up again and separates from the extruded product 3.
[0040]
At this time, 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 (the cutting blade 3 actually moves the extruded product 3). The period gradually moves to the left side in the figure as well. Therefore, strictly speaking, the cutting blade 232 is pushed and bent to the left in the drawing by the upstream extrusion 3, and at the same time, the upstream extrusion 3 is pushed back to the right by the cutting blade 232. At this time, the cutting blade 232 is formed with an inclined blade surface 232b for forming the blade edge 232a only on the downstream side, that is, on the left side in the figure, and the upstream side, that is, the right side in the figure is formed almost vertically. Therefore, when the inclined surface is also formed on the upstream blade surface, or compared to the case where only the upstream blade surface is formed, the amount by which the cutting blade 232 is bent to the downstream side, And since the amount by which the upstream extrusion product 3 is pushed back to the upstream side can be reduced, the cutting position of the extrusion product 3 can be made more accurate, and the cut surface is formed more vertically. In addition, damage to the extruded product 3 can be further reduced.
[0041]
When the cutting blade 232 starts to rise after cutting the extruded product 3, the cutting blade 232 and the upstream extruded product 3 are pressed against each other for the above-described reason. As it rises, the cut end of the upstream extruded product 3 tends to be pulled upward. At this time, since the pressing roller 231 presses the extruded product 3 from above with a predetermined pressure on the upstream side of the cutting blade 232, it is possible to prevent the extruded product 3 from being pulled up by the rising of the cutting blade. it can.
[0042]
In order to further enhance the above effect, as shown by a two-dot chain line in FIG. 4 (b), the cutting blade 232 itself is installed slightly inclined toward the downstream side toward the extruded product 3, and in the inclination direction. It is preferable to lower. If it does in this way, since it cuts from the upstream side with respect to the extrusion molded product 3 progressing to the left side in the figure and proceeds to the oblique downstream side, the movement amount of the extrusion molded product 3 is set to the cutting blade 232 during the above-mentioned cutting period. The amount of cutting can be reduced by the amount of cutting, and as a result, the cut surface of the extruded product 3 can be formed closer to the vertical surface. Moreover, the damage given to the extrusion molded product 3 can further be reduced similarly to the above.
[0043]
Here, in the configuration of the cutting mechanism of the present embodiment, the inclination angle θ of the cutting blade 232 is preferably within a range of 1 to 5 degrees, and particularly preferably 2 to 3 degrees. If it falls below these ranges, the above-mentioned effect cannot be obtained, and if it exceeds these ranges, cutting failure may occur.
[0044]
In this embodiment, the pushing member 2385 is moved in the horizontal direction by the operation of the drive source 2381, the pushing member 2385 is collided with the driven member 2387 in the middle of the forward movement, and the cutting blade 232 is lowered, and then the cutting blade 232 is moved. Is increased by the elastic force of the elastic member 2389, and the return path operation of the pushing member 2385 does not hinder the raising of the cutting blade 232, so that it is not affected by the acceleration / deceleration characteristics in the reciprocating operation of the pushing member 2385. The cutting blade 232 can be moved up and down very quickly, and the time lag between the end time of the lowering operation of the cutting blade 232 and the start time of the ascending operation can be reduced.
[0045]
FIG. 5 (a) shows a graph showing the lifting / lowering operation of the cutting blade 232 of this embodiment, and FIG. 5 (b) shows a vertical drive shaft installed in a vertical posture of an electromagnetic solenoid (the same as the drive source 2381). The graph which shows the raising / lowering operation | movement of a cutting blade at the time of providing the cutting mechanism comprised by fixing a cutting blade to is shown. As can be seen from these graphs, in the present embodiment, the time between the end of the lowering operation of the cutting blade and the start of the ascent operation is extremely small. The period in which the extruded product is in contact (S1) is significantly shorter than the conventional cutting operation period S2. Also, the lifting / lowering operation period of the cutting blade (the period from the time when the cutting blade starts to descend to the time when the lifting is completed) T1 is also shorter than the conventional lifting / lowering operation period T2. In this embodiment, since the raising / lowering speed of the cutting blade itself is also higher than the operation speed of the cutting blade directly connected to the drive source, the cutting operation period S1 is significantly shortened compared to the case of a normal cutting mechanism. It is possible.
[0046]
In addition, the cutting mechanism and the extrusion molding apparatus of the extrusion molded product of the present invention are not limited to the illustrated examples described above, and it is needless to say that various modifications can be made without departing from the gist of the present invention. .
[0047]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the degree of mutual pressing between the cutting blade and the upstream extrusion product due to the extrusion amount of the extrusion product during cutting. Since the blade can be operated at high speed, even if the cutting mechanism is fixed, it is possible to reduce misalignment of the cutting position, inclination of the cut surface, damage to the extruded product, etc. without interrupting extrusion molding. it can.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing the overall configuration of an embodiment of an extrusion molded product cutting mechanism and an extrusion molding apparatus according to the present invention.
FIG. 2 is a side view of a molded product cutting part according to the embodiment.
FIG. 3 is a front view of a molded product cutting portion according to the embodiment.
FIG. 4 is an enlarged front sectional view (a) showing a state in which the vicinity of the cutting blade in the embodiment is viewed from the front side and an enlarged side sectional view (b) viewed from the side surface side.
FIG. 5 is a graph (a) showing the lifting / lowering operation of the cutting blade in the same embodiment and a graph (b) showing the lifting / lowering operation of the cutting blade when directly driven by an electromagnetic solenoid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Extruder 20 Cutting mechanism 21 Molded article guide path 22 Molded speed detection part 23 Molded article cutting part 231 Press roller 232 Cutting blade 232a Cutting edge 232b Inclined blade surface 2381 Drive source 2385 Extruding member 2385a Inclined surface 2385b Vertical surface 2386, 2389 Elasticity Member 2387 Driven member 2387a Inclined surface 2387b Vertical surface 2388 Cutting support

Claims (3)

In the cutting mechanism of the extruded product for cutting the extruded product extruded by extrusion molding,
A molded product guide path extending in the extrusion direction of the extruded molded product, a cutting blade for cutting the extruded molded product traveling along the molded product guide path, and a driving means for driving the cutting blade ,
The drive means is configured to push the cutting blade toward the extrusion-molded product, and is configured not to substantially interfere with the cutting blade except for a period during which the cutting blade is pushed out. And a retracting means for biasing the cutting blade in a direction for retracting the cutting blade from the extruded product side,
The pusher member is configured to rotate in a direction to avoid the cutting blade when contacting the cutting blade during the other operation of the forward path operation and the backward path operation. A cutting mechanism for an extrusion-molded product, comprising posture returning means for urging the push-out member in the opposite direction.   The pressing member and the cutting blade according to claim 1, wherein the abutting surfaces that abut each other in a direction substantially perpendicular to a protruding and retracting direction of the cutting blade during the operation of the other of the forward path operation and the backward path operation. A cutting mechanism for an extrusion-molded product, comprising:   3. The pressing member according to claim 1, further comprising a pressing member that presses the extruded product against the molded product guide path at an adjacent position upstream of a cutting position by the cutting blade. The cutting mechanism of the extruded product.

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