JPH07164385A - Cutting device for long material - Google Patents

Abstract

PURPOSE:To cut a long material such as a molding extruded intermittently from a ram extruder, for example, in a specific size automatically and accurate ly, and also to reduce the cost. CONSTITUTION:A movable cutting table 20 which can move freely along the conveying direction of an extruded molding 2; a cutting edge 41 provided on the cutting table 20; sensors 71 and 72 for detecting molding end, interlocking with the cutting table 20, and provided at the downstream side in a specific size from the cutting edge 41 along the conveying direction of the molding 2; and a controller 90 to control the moving operation of the movable cutting table 20, and the cutting operation of the cutting edge 41, depending on the output signals from the sensors 71 and 72; are provided. And by the operation of the controller 90, the cutting table 20 is moved until the sensor 71 reaches to the end position of the molding 2, so as to cut the molding 2 by the cutting edge 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long material cutting device for cutting a molded product or the like intermittently extruded from a ram extruder into a predetermined size.

[0002]

2. Description of the Related Art Conventionally, in a cutting device for cutting a long material such as a molded product which is continuously extruded from an extruder, the cutting blade is moved while being synchronized with the molded product. Is common. This cutting device measures the conveying speed of the molded product indirectly from the number of revolutions of the conveyor roll for conveying the molded product, and also measures the conveyed amount from the speed, and when the conveyed amount reaches a predetermined amount. Then, by starting the cutting operation by the cutting blade, it is possible to perform the fixed length cutting.

On the other hand, synthetic resins such as ultra-high molecular weight polyethylene, polytetrafluoroethylene, and polyimide have a low dynamic friction coefficient, a high melt viscosity at a high molecular weight, and a low fluidity. Has
An ordinary extruder in which a molded product is continuously extruded cannot be used, but an extruder in which extrusion is intermittently extruded, a so-called ram extruder is used.

[0004]

However, when cutting a molded product extruded from a ram extruder, the above conventional cutting device cannot be used. That is,
In a ram extruder in which a molded product is extruded intermittently, the extrusion speed of the molded product is not constant, so it is difficult to measure the speed accurately, and it is not possible to accurately measure the transport amount, and the cutting dimension accuracy is Will fall. Moreover, since the molded product is conveyed intermittently, it is very difficult to synchronize the cutting blade with it, and the cutting dimension accuracy is further reduced, and it is not possible to accurately cut to a fixed size. The device could not be used.

For this reason, in the past, when a molded product to be intermittently extruded is cut to a fixed length, the operator himself measures with a measure or the like and then cuts with a hand saw or the like, which is very complicated. There was a problem.
Furthermore, if the molded product is cut manually in this way, dimensional accuracy will vary due to skill levels, individual differences, etc.
In addition to the decrease in dimensional accuracy, labor costs are high and the cost also rises.

The present invention solves the above-mentioned problems of the prior art and, for example, can automatically and accurately cut a long material such as a molded product extruded intermittently from a ram extrusion molding machine to a predetermined size and reduce the cost. It is an object of the present invention to provide a long material cutting device capable of achieving the following.

[0007]

In order to achieve the above object, the present invention provides a long material cutting device for cutting a long material intermittently conveyed along the longitudinal direction into a predetermined size. There is a base, a movable cutting table attached to the base so as to be movable along a long material conveying line, and provided on the moving cutting table for cutting a long material on the conveying line. An end for detecting the end of the long material, which is provided downstream of the cutting blade along the conveyance direction of the long material by a predetermined dimension in association with the cutting blade and the movable cutting table. A part detector and a controller for performing a moving operation of the moving cutting table and a cutting operation of the cutting blade based on an output signal from the end detector, and by the operation by the controller, intermittent conveyance is performed. The end of the long The movable cutting table is moved until the detector reaches the end position of the elongated member, by the cutting blade is intended to subject matter to become configured to long material is cut.

[0008]

The apparatus for cutting a long material according to the present invention comprises a movable cutting table which is movable along the conveying direction of a long material such as an extruded product.
A cutting blade provided on the cutting table, a moving cutting table, and a molded product edge detector provided downstream of the cutting blade along the carrying direction of the extruded product by the cutting dimension, and Based on the output signal from the detector, it has a controller for moving the moving cutting table and cutting blade, and moves by the controller until the detector reaches the end position of the molded product. The cutting table moves so that the molded product is cut by the cutting blade.

Therefore, unlike the conventional apparatus, it is not necessary to measure the conveying speed of the molded product or to synchronously move the cutting blades, and it is possible to prevent the deterioration of the accuracy of the cutting dimension due to these and to convey the molded products intermittently. A molded product can be automatically cut to a fixed size.

Moreover, since it is not necessary to manually cut the molded product, it is possible to prevent the accuracy of the cutting dimension from being lowered due to the skill level of the operator, individual differences, and the like, and it is possible to reduce the labor cost.

[0011]

FIG. 4 is a side view schematically showing a resin molded product manufacturing apparatus to which a cutting device (P) according to an embodiment of the present invention is applied. As shown in the figure, in this device,
The long shaped product (2) intermittently extruded from the ram extruder (1) is sequentially conveyed along a longitudinal direction thereof along a predetermined conveying line by a conveyor (3) to a cutting device (P), The cutting device (P) sequentially cuts to a fixed length to sequentially manufacture molded products of a predetermined size.

As shown in FIG. 1, the cutting device (P) has a base (10) and a movable cutting table (20) provided on the base (10). At the top of the base (10),
The cutting table mounting rail (11) extending along the conveying line of the molded product (2) is fixed, and the male screw shaft (12) of the ball screw mechanism that is also arranged so as to extend along the conveying line of the molded product is the same. It is attached so that it can rotate around its axis. Further, the base (10) has a male screw shaft (12).
A cutting table moving motor (13) for rotating the cutting machine is attached.

A slider (21) movable along the rail is attached to the cutting table mounting rail (11), and a movable cutting table (20) is attached to the slider (21). Accordingly, the movable cutting table (20) is configured to be movable along the rail (11), that is, along the transfer line, below the molded product transfer line. Further, a nut (22) fixed to the movable cutting table (20) is screwed to the male screw shaft (12) of the ball screw mechanism, and the nut (22) is fixed according to the rotation amount of the male screw shaft (12) of the ball screw mechanism. , Is designed to move along a transport line.

A clamp mechanism (3) is provided on the upper surface of the moving cutting table (20) on the upstream side with respect to the conveying direction of the molded product (2).
0) is provided. The clamp mechanism (30) has a clamp claw (31) and a clamp drive means (32) for operating the clamp claw (31), and operates the clamp claw (31) as necessary. Thereby, the molded product (2) on the transfer line is pressed against the movable cutting table (20) side by the clamp claws (31), and the molded product (2) can be fixed in position with respect to the movable cutting table (20). There is.

The cutting machine body (4) is provided on the upper surface of the moving cutting table (20) on the downstream side with respect to the conveying direction of the molded product (2).
0) is provided. The cutting machine body (40) has a circular saw-shaped cutting blade (41) and a cutting blade rotation motor (42) for rotating the cutting blade (41).
2) is attached to the cutting blade support base (45) attached to the movable cutting base (20) so as to be able to move up and down. Further, a cylinder (46) is attached to the cutting blade support base (45) corresponding to above the motor (42), and a rod of the cylinder (46) is attached to the cutting blade rotation motor (42). It is installed. When the rod is moved forward and backward by driving the cylinder (46), the cutting blade (41) moves up and down together with the motor (42). Furthermore, a circular saw type cutting blade (4
When the 1) is rotated and lowered, the molded product (2) arranged on the transfer line is cut.

The moving cutting table (20) is provided with a cutting blade cover (25) so as to cover the cutting blade (41).

The moving cutting table (20) is provided with a roll conveyor (50) extending downstream along the direction in which the molded product is conveyed. As shown in FIG. 2 (a), the roll conveyors (50) are arranged on both sides of the transfer line and have a base (1).
It has side frames (51) (51) fixed to the (0) side, and a plurality of conveyor rolls (5) are provided at intervals along the conveyance line between the side frames (51) (51).
2) is rotatably attached. Then, by the rotation of the conveyor roll (52), the molded product (2) sent out from the moving cutting table (20) is conveyed along the conveying line.

On the movable cutting table (20), a sensor mounting rail (6) having a rectangular cross-section extending in the downstream side along the transfer line in parallel with the roll conveyor (50).
0) is arranged. This sensor mounting rail (6
0) has one end side fixed to the movable cutting base (20) and a pair of upper and lower rail support wheels (6) rotatably attached to the side frame (51) side at a required place.
1) It is sandwiched by (61). Then, when the movable cutting table (20) moves along the transfer line, the sensor mounting rail (60) is interlocked with it and the sensor mounting rail (60) moves in its longitudinal direction.
That is, it moves along the transport line. At this time, the rail support wheel (61) supports the sensor mounting rail (60) while rotating, so that the sensor mounting rail (60) is accurately guided in the longitudinal direction while being held at a predetermined height. The Rukoto.

As shown in FIGS. 1 and 2C, a sensor mounting bracket (80) is arranged on the sensor mounting rail (60). This bracket (80)
Is provided with a fitting piece (81) which can be freely inserted into and removed from the sensor mounting rail (60). With the fitting piece (81) fitted to the rail (60), the fitting piece (81 81), the tip of the position fixing screw (82) screwed into the rail (60) is pressed against the rail (60), so that the sensor mounting bracket (80)
Is fixed to the rail (60). In this configuration, when the position fixing screw (82) is loosened and the pressure contact with the rail (60) is released, the position fixing of the bracket (80) on the rail is released and the bracket (80) can be slid on the rail and at the same time. In the slide position, the position fixing screw (82) is tightened and pressed against the rail (60) to fix the position of the bracket (80) on the rail. In this way, the bracket (80) can be fixed at any position on the rail.

The sensor mounting bracket (80) is provided with sensor mounting pieces (83) (83) located on both upper and lower sides of the carrying line. The sensor attachment pieces (83) (83) are provided with a pair of upper and lower first and second molded product end portion detection sensors (71) (7) formed of photoelectric tubes and the like.
2) are provided side by side along the transport line at intervals of about 12 mm. Then, when the molded product (2) is conveyed so that the end of the molded product passes between the pair of sensors and the light beam between the two is blocked, the sensor (71) (72) detects the molded product (2). Will be emitted.

As shown in FIG. 1, the cutting device (P) of this embodiment is provided with a controller (90) for detecting the ends of the first and second molded products. Signals are sent to the sensors (71) (72) and the driving means such as the cutting table moving motor (13), the clamp driving means (32), the cutting blade rotating motor (42) and the cutting blade lifting cylinder (46). Connected via wires. And in this cutting device (P),
The controller (90) controls the drive of each of the drive means based on the output signals from the first and second sensors (71) and (72), thereby performing the operation described below.

Next, the operation of the cutting device (P) will be described. Before starting the operation, the distance from the cutting blade (41) to the first sensor (71) is adjusted to a desired value by adjusting the mounting position of the sensor bracket (80) on the sensor mounting rail (60). Set it to be equal to the cutting size.

In this state, the molded product (2) extruded intermittently from the ram extruder (1) is transferred to the conveyor (3).
Is intermittently fed to the cutting device (P) along the transport line and passes through the mounting position of the cutting blade (41) as shown in FIG. 3 (a). Further, as shown in FIG.
When the molded product (2) is conveyed and its tip reaches the first sensor (71), a signal to that effect is output from the first sensor (71) to the controller (90) (sensor ( 71) becomes "ON").

Subsequently, as shown in FIG. 3C, when the end of the molded product reaches the second sensor (72), a signal to that effect is output from the second sensor (72) (sensor). (72) becomes "ON").

The controller (90) having received the signal from the second sensor (72) starts driving the cutting table moving motor (13). As a result, the movable cutting table (20) is moved to the first and second sensors (71).
Together with (72), it moves in the carrying direction. The moving cutting table (20) moves, and first the second sensor (72)
When the resin reaches the end of the molded product, a signal to that effect is output from the sensor (72) (the sensor (72) indicates “OF”).
F "). Then, when the first sensor (71) reaches the end of the molded product, a signal to that effect is sent to the sensor (71).
Is output (the sensor (71) is turned “OFF”).

The controller (90) receiving the signal from the first sensor (71) immediately stops the driving of the cutting table moving motor (13), and the moving cutting table (20) and the sensor (71). ) Stop moving (72). As a result, as shown in FIG.
The sensor (71) is arranged corresponding to the end position of the molded product (2), and the distance from the molded product end to the cutting blade (41) is from the first sensor (71) to the cutting blade (41). Is equal to the desired cutting dimension as described above.

Subsequently, the controller (90) causes the clamp driving means (32) and the cutting blade rotating motor (42).
And by controlling the drive of the cutting blade lifting cylinder (46), the molded product (2) is fixed by the clamp mechanism (30), and then the cutting blade (41) is moved as shown in FIG. 3 (e). The molded product (2) is rotated and lowered to be cut. At this time, the cutting blade (41) is cut from the end of the molded product (2).
Since the distance to is equal to the desired cutting size, the cut molding (2) is equal to the desired cutting size.

Next, by operating the controller (90), the cutting blade (41) is lifted to stop the rotation, and the molded product (2) is released from the clamp mechanism (30). After that, the movable cutting table (20) and the first and second sensors (71) and (72) move in the direction opposite to the transport direction, and these return to their original positions.

In the operation from the movement cutting table (20) moving in the conveying direction until the cutting of the molded product (2) is completed, the intermittent transportation of the molded product (2) is stopped. It is carried out during the period of time (conveyance stop period).

On the other hand, the cut molded product (2) is discharged to a predetermined position by a discharge mechanism (not shown), and the molded product (2) remaining on the transport line is intermittently transported as described above. Then, the same operation as described above is repeated.

Molded products (2) cut into a predetermined size in this manner are successively manufactured.

According to this cutting device, the molded product (2) extruded intermittently can be automatically cut to a fixed length. In addition, unlike the above-mentioned conventional apparatus, since the conveyance speed of the molded product and the synchronous movement of the cutting blade are not performed, it is possible to prevent the reduction in the accuracy of the cutting dimension due to these and improve the dimensional accuracy.

Furthermore, since the molded product (2) can be cut automatically, it is not necessary to perform the cutting manually, and it is possible to prevent the cutting dimensional accuracy from deteriorating due to the skill level of the operator or individual differences. In terms of points, the cutting dimension accuracy can be improved, and the labor cost can be reduced to reduce the cost.

For reference, when the molded product is manually cut as in the conventional case, the error in the cutting dimension is 0 to 20 mm, whereas when the device (P) of this embodiment performs the cutting. The error in the cutting dimension could be suppressed within the range of ± 1 mm.

Further, in this embodiment, since the hand saw is not used, the safety of the worker can be improved. Furthermore, by installing a dust collector near the cutting blade (41), it is possible to prevent scattering of cutting powder of the molded product and to obtain a comfortable working environment.

Further, in the above-mentioned embodiment, since two sensors for detecting the end portion of the molded product are provided, the cutting dimension accuracy can be further improved as described below.

That is, the motor (42) for moving the movable cutting table (40) does not have a stable rotation speed immediately after the start of rotation, and some time is required until the rotation speed stabilizes. In other words, the movement cutting stand (40) has lower positional accuracy when stopped as the moving distance decreases, and has higher positional accuracy when stopped as the moving distance increases. Therefore, if the number of sensors for detecting the end of the molded product is one, if the end of the molded product conveyed intermittently stops immediately after passing the sensor, the moving distance of the moving cutting table (40) becomes very small. As a result, the stop position accuracy may decrease, the cutting position accuracy may decrease, and the cutting dimension accuracy may decrease. On the other hand, when two molded product edge detecting sensors are provided at intervals, the moving operation of the moving cutting table (40) is started only when the molded product end passes through the two sensors. Done. In other words, the moving cutting table (40) moves at least the distance between the two sensors, the moving distance becomes long, the stop position accuracy becomes high, the cutting position accuracy becomes high, and the cutting dimension accuracy becomes high. .

However, in the present invention, it is not always necessary to provide two sensors such as a molded product edge detector, but one sensor may be used.

The cutting blade is not limited to the circular saw type cutting blade described above, and a guillotine type cutting blade can be used. It is better to use a saw type.

[0040]

As described above, according to the apparatus for cutting a long material of the present invention, a movable cutting table which is movable along the conveying direction of a long material such as an extruded product and the cutting table is provided. The cutting edge and the moving cutting table are linked to each other, and the molded product edge detector provided downstream of the cutting blade by the cutting dimension along the conveying direction of the extruded product and the output from the detector Based on the signal, a controller that performs a moving operation of the moving cutting table and a cutting operation of the cutting blade, and by the operation by the controller, the moving cutting table moves until the detector reaches the end position of the molded article, Since the molded product is cut by the cutting blade, it is not necessary to measure the molded product transport speed or perform the synchronized movement of the cutting blade unlike the conventional device, and it is possible to prevent the reduction of the cutting dimension accuracy due to these. Therefore, it can be transported intermittently. Things accurately can be automatically fixed size cutting. Moreover, since it is not necessary to manually cut the molded product, it is possible to prevent the cutting dimension accuracy from deteriorating based on the skill level of the operator, individual differences, etc., and further improve the cutting dimension accuracy. At the same time, the labor cost can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a cutting device according to an embodiment of the present invention.

2A and 2B are cross-sectional views showing a cutting device of an embodiment, wherein FIG. 2A is a cross-sectional view taken along the line IIIA-IIIA in FIG. 1 and FIG.
IIIB-IIIB sectional view of FIG. 1, (c) is IIIC-IIIC of FIG.
It is a line sectional view.

FIG. 3 is a schematic diagram for explaining the operation of the cutting device of the embodiment.

FIG. 4 is a side view schematically showing a molded product manufacturing apparatus to which the cutting device of the embodiment is applied.

[Explanation of symbols]

 2 ... Molded article 10 ... Base 20 ... Moving cutting table 41 ... Cutting blades 71, 72 ... Sensor 90 ... Controller P ... Cutting device

Claims (1)

[Claims] 1. A cutting device for a long material for cutting a long material intermittently conveyed along a longitudinal direction into a predetermined size, comprising a base and a long material on the base. A movable cutting table that is movably attached along the transfer line, a cutting blade that is provided on the movable cutting table for cutting a long material on the transfer line, and the cutting table that interlocks with the movable cutting table. An end detector for detecting the end of the long material, which is provided on the downstream side along the conveyance direction of the long material by a predetermined dimension from the blade, and an output signal from the end detector. Based on the above, a controller for performing a moving operation of the movable cutting table and a cutting operation of the cutting blade is provided, and by the operation by the controller, during the conveyance stop period of the long material intermittently conveyed, the end detector Move until the end of the long material is reached A device for cutting a long material, characterized in that the cutting table is moved so that the long blade is cut by the cutting blade.