JPH0929700A - Method for cutting beltlike rubber member using high frequency cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a beltlike rubber member T so as to form a clean cut surface and a highly accurate cut angle and to increase a speed for cutting work. SOLUTION: A high frequency cutting device having a vibration cutter 3 for cutting the full width of a beltlike rubber member at a stroke, a high frequency vibration mechanism 4, a high frequency power source 6, a cylinder mechanism 10 for lowering the vibration cutter in a cutting direction and a thickness measuring device 11 for measuring the thickness of a beltlike rubber member is used and based on thickness data from the thickness measuring device 11, the lowering speed V1 to the surface of the beltlike rubber member and the returning speed V2 of the vibration cutter 3 after cutting are set larger than a speed V0 during cutting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a belt-shaped rubber member using a high frequency cutting device.

[0002]

2. Description of the Related Art Conventionally, a cutting method utilizing high frequency has been provided as a cutting method for eliminating the drawbacks of a rotary blade using water as a lubricant and an electrothermal cutter (for example, Japanese Patent Laid-Open No. 59-187499). ). The method disclosed in JP-A-59-187499 discloses a vibrating blade, a high-frequency vibrating mechanism that is connected to the vibrating blade and applies high-frequency vibration to the vibrating blade,
A high-frequency power source for supplying a high-frequency current to the high-frequency vibrating mechanism and a receiving seat member for supporting a flexible rubber-like member having a groove portion for engaging the vibrating blade are provided, and the vibrating blade is positioned in the groove portion. In this state, the vibrating blade is moved in the width direction of the rubber-like member with respect to the rubber-like member by the moving mechanism to cut the rubber-like member.

[0003]

However, in the above method, the blade is traversed across the rubber-like member in the width direction to cut the rubber-like member. There was room for improvement in order to upgrade.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for cutting a strip-shaped rubber member, which can speed up the work for cutting the strip-shaped rubber member without impairing the cutting accuracy. To aim.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a vibrating blade that descends from the upper standby position in the cutting direction to cut the entire width of the belt-shaped member at one time, and a high-frequency vibration is connected to the vibrating blade. A high-frequency vibrating mechanism for giving, a high-frequency power source for supplying a high-frequency current to the high-frequency vibrating mechanism, a supporting portion having a groove portion into which the cutting edge of the vibrating blade can enter, and supporting the belt-shaped rubber member from below, and the high-frequency vibrating mechanism. A high-frequency cutting device provided with a cylinder mechanism that is connected and that lowers the vibrating blade from the upper standby position in the cutting direction to cut the belt-shaped rubber member by the vibrating blade, and a thickness measuring device that measures the thickness of the belt-shaped rubber member. Then, based on the thickness data from the thickness measuring device, the descending speed from the upper standby position of the vibrating blade to the surface of the belt-shaped rubber member and the upper standby position from the cutting end position of the belt-shaped rubber member. The return speed to return to, and configured to be larger than the rate of progression during the cutting in the belt-shaped rubber member of the vibrating blade.

[0006]

According to the present invention, since the vibrating blade is lowered from the upper standby position in the cutting direction of the belt-shaped rubber member to cut the belt-shaped rubber member at the full width at a time, the vibration blade is traversed in the width direction of the belt-shaped rubber member. The cutting time is very short compared to. Moreover, the moving speed of the vibrating blade from the upper standby position to the surface of the belt-shaped rubber member and from the cutting end position of the belt-shaped rubber member to the upper standby position are both the moving speed of the vibrating blade during cutting of the belt-shaped rubber member. Since it is faster than the above, the single cutting cycle time of the belt-shaped rubber member is significantly shortened.
These greatly speed up the work of cutting the strip-shaped rubber member. Further, high-frequency vibration is applied to the vibrating blade to cut the belt-shaped rubber member, so that a clean and highly accurate cutting surface and cutting angle, which are advantages of high-frequency cutting, can be obtained.

[0007]

An embodiment of the present invention will be described below with reference to FIG. In these drawings, reference numeral 1 is a casing. A well-known high-frequency oscillator (not shown) is mounted in the casing 1, and a high-frequency vibrating blade 3 is attached to the tip of the high-frequency oscillator via an amplifier 2. The vibrator and the amplifier 2 are combined to form a high frequency vibration mechanism 4. A high frequency power source 6 is connected to the vibrator via a cable 5, and the high frequency power source 6 supplies a high frequency current (for example, 200 W, about 28,000 H) to the vibrator.
z) is output.

As shown in FIG. 1, the vibrating blade 3 has an acute-angled cross-sectional shape of the cutting edge portion 7 at the tip, but the cross-sectional shape of the cutting edge portion 7 is not limited to an acute angle and may be an arc shape. Further, the blade crossover dimension of the vibrating blade 3 is equal to or larger than the width dimension of the tread member T which is a belt-shaped rubber member. Therefore, the vibrating blade 3 is of a so-called guillotine type capable of cutting the tread member T in its thickness direction at one full width. Further, the linear distance from the tip of the vibrating blade 3 to the base end is sufficiently longer than the thickness dimension of the tread member T to be cut.

The tip of a telescopic rod 8 is fixed to the rear end of the casing 1. The telescopic rod 8 constitutes a cylinder mechanism 10 together with the cylinder body 9. The cylinder mechanism 10 is of a hydraulic type, and is capable of stopping the telescopic rod 8 at any position between the maximum retracted position and the maximum extended position. The cylinder mechanism 10 is not limited to the hydraulic type, but an air type with a lock mechanism that can fix the telescopic rod 8 at an arbitrary position can be used.

The cylinder mechanism 10 is of a fixed type, and the cylinder body 9 is fixed to a part of a gate-shaped frame straddling the tread member T via a rotary shaft with a lock device (not shown) though it is not shown. Then, the cutting angle of the vibrating blade 3 can be changed between 15 degrees and 30 degrees by rotating the cylinder body 9 around the rotation axis by a predetermined angle and fixing it at that position.

Reference numeral 11 is a detector for detecting the surface and thickness of the tread member T, and is attached to a part of a gate-shaped frame (not shown) like the cylinder body 9.
The detector 11 is connected to a control device (not shown) via a cable (not shown).

Reference numeral 12 is a conveyor that supports the tread member T extruded from the extruder from below and conveys it to a downstream process. A part of the conveyor 12 has a cutting edge portion 7 of the vibrating blade 3.
A linear groove 13 into which the groove can be inserted is formed along the width direction of the conveyor 12. This conveyor 12 has a belt 14
Roll 1 by passing the roll 15 at the lower position on the way
An empty space formed above 5 is used as a groove 13.

Next, the operation of this embodiment will be described with reference to FIGS. (1) The vibrating blade 3 is set to the cutting angle α in advance. When the tip of the tread member T extruded from the extruder goes on the conveyor 12 in the direction of the arrow A and reaches below the thickness detector 11, the thickness detector 11 detects the tip of the tread member T and measures the thickness dimension. To do. Next, based on the thickness data of the tread member T, the control device moves the vibrating blade 3 from the surface of the tread member T to a desired height position and waits (FIG. 2).
reference).

(2) When the tread member T advances by a fixed length and the portion to be cut of the tread member T reaches the groove 13, the controller stops the conveyor 12. Then, the cylinder mechanism 10 is driven by the descending command from the control device, and the vibrating blade 3 sets the descending speed V1 from the upper standby position to the maximum speed and the cutting direction B.
(See FIG. 1) The blade edge is lowered along the surface of the tread member T (see FIG. 3).

(3) When the cutting edge reaches the surface of the tread member T, the cylinder mechanism 10 causes the vibrating blade 3 to move the vibrating blade 3 (lower than the maximum speed of the tread member T preset based on a speed change command from the controller. ) Advance in the cutting direction at the cutting speed V0 (see FIG. 4). At this time, the high frequency power source 6
A switch is turned on, and a high-frequency current flows to the vibrator via the cable 5, and the vibrator vibrates. The vibration of the vibrator is amplified by the amplifier and transmitted to the vibrating blade 3, and the cutting is advanced while vibrating the vibrating blade 3 with a predetermined amplitude in the width direction and the thickness direction of the tread member T.

(4) The tread member T is completely cut off when the blade edge of the vibrating blade 3 enters the groove 13. Since the vibrating blade 3 vibrates at high frequency with a desired amplitude, the tread member T is completely cut with a clean cutting surface without causing a contact resistance between itself and the vibrating blade 3 and without leaving an uncut portion. Further, since the blade crossover dimension of the vibrating blade 3 is equal to or larger than the total width dimension of the tread member T, the entire width of the tread member T is cut by one downward movement.

(5) When the tread member T is completely cut, the vibrating blade 3 returns to the original upper standby position with the return speed V2 set to the maximum speed in response to a return command from the control device (FIG. 5). The vibrating blade 3 waits for the next descending command. When the conveyor 12 is driven again and the tread member T is sent out by the constant length, the operations after (2) are repeated to perform the next constant length cutting.

[0018]

According to the method of cutting a belt-shaped rubber member of the present invention, the belt-shaped rubber member can be cut with a clean cutting surface and a high-precision cutting angle, and the cutting work can be speeded up. it can.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, showing a cutting operation of a tread member,

FIG. 2 is a diagram showing a cutting process of the tread member,

FIG. 3 is a diagram showing a cutting process of the tread member,

FIG. 4 is a diagram showing a cutting process of the tread member,

FIG. 5 is a diagram showing a step of cutting a tread member.

[Explanation of symbols]

 3 Vibration Blade 4 High Frequency Vibration Mechanism 6 High Frequency Power Supply 10 Cylinder Mechanism 11 Thickness Detector 12 Conveyor (Supporting Part) 13 Groove V1 Falling Speed V2 Returning Speed V0 Cutting Speed.

Claims (1)

[Claims] 1. A vibrating blade that descends from an upper standby position in the cutting direction to cut the strip-shaped member at a full width at a time, and a high-frequency vibrating mechanism that is connected to the vibrating blade and applies high-frequency vibration to the vibrating blade.
A high-frequency power source for supplying a high-frequency current to the high-frequency vibration mechanism, a support portion having a groove portion into which the blade tip of the vibration blade can enter, and supporting the strip-shaped rubber member from below, and the vibration blade connected to the high-frequency vibration mechanism. Using a high-frequency cutting device including a cylinder mechanism that lowers the belt-shaped rubber member by the vibrating blade to lower the belt-shaped rubber member from the upper standby position, and a thickness measuring device that measures the thickness of the belt-shaped rubber member. Based on the thickness data from, the descending speed from the upper standby position of the vibrating blade to the surface of the strip-shaped rubber member and the return speed from the cutting end position of the strip-shaped rubber member to the return to the upper standby position, A method for cutting a belt-shaped rubber member, which is characterized in that the moving speed is made higher than that of the rubber member during cutting.