JPS63295200A - Heat ray automatic cutter device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is for processing small blocks of dimensions suitable for packing blocks for various industrial products, insulation blocks, etc. from coarse large blocks of resin foam such as styrofoam. , relates to an automatic hot wire cutter device used for cutting the rough blocks.

(Prior Art) Conventionally, such melt-cutting of a resin foam block involves cutting a nichrome wire with a diameter of approximately 0.5 mm between two wooden shafts that have numerous grooves erected on both left and right sides of the upper surface of the base. After energizing the nichrome wire using a tensioning device, a rough block of resin foam was supported and pushed by hand, fed through between two shafts, and then fused and cut with the nichrome wire.

However, this conventional cutter device is a completely manual device, and each nichrome wire must be stretched manually, one by one, while measuring the line spacing with a caliper, etc., and this work is done using a resin foam block. It required a time that was a times longer than the fusing time itself, and the workability was extremely poor. Furthermore, the dimensional accuracy after fusing was also significantly inferior.

Therefore, the inventors of the tree proposed patent application No. 61-262314,
As shown in Utility Model Application No. 61-196982, etc., it is equipped with a mechanism for automatically changing the height of sea urchins, heating wires, and chrome wires, and an automatic feeding mechanism for resin foam blocks, and is a hot wire automatic that automates the fusing process of the solo-nk. A cutter device has already been proposed.

These proposed devices can automatically stretch each heating wire to the appropriate height according to the loft, so it is possible to significantly improve the workability of melt cutting processing of resin foam blocks, and the blocks that can be obtained. The dimensional accuracy of products can be greatly improved.

(Problem to be solved by the invention) However, the above-mentioned proposed automatic hot wire cutter device
Numerical quantity w, including a ball screw, etc., as a mechanism for vertically moving the heat wire itself or the important parts thereof
When using a mechanism, etc., the mechanism of inserting and removing the claws of the ball screw part and pinching and engaging with the holder becomes complicated, and it is also necessary to increase the number of drive motors each time the number of electric wires to be stretched increases. This has led to problems such as an increase in the size of the device and a significant increase in product price. In addition, all heating wires (important materials) are connected to the drive motor.
Because the structure operates in the same way, it is possible to process only product flocks of the same thickness.

In addition, the automatic hot wire cutter device proposed above had a structure in which all the heating wires stretched from the left and right electrode rods were energized at the same time, so even the heating wires that were not actually used for cutting during processing were energized. However, it had the disadvantage of large current loss, which caused problems in terms of operating costs.

The present invention was made in consideration of the above-mentioned circumstances, and
The purpose is to be able to accurately and automatically cut resin foam blocks to a variety of desired thicknesses, and to greatly simplify the structure of the equipment, especially the drive mechanism, greatly reducing product costs and operating costs. Our objective is to provide an automatic hot wire cutter device.

(Means for Solving the Problems) The automatic hot wire cutter device of the present invention has a structure in which the heating wire is held or held between sandwiching members and the height of the heating wire can be arbitrarily changed by a drive motor, particularly a servo motor. , a part of the electrode rod is provided with an insulating part that makes it difficult to conduct electricity to the heating wire.

That is, in the device of the present invention, a pair of electrode rods and a pair of pillars are respectively installed on the left and right sides of the upper surface of the base, and a predetermined number of thin diameter heating wires are hung on the left and right electrode rods, respectively, and A predetermined number of left and right heavy stationery items are attached to the pillar so as to be movable up and down, and are stretched through a tension means. A heating wire height changing mechanism is installed on each of the left and right sides of the base to bring the stationery closer to or away from it, and move it up and down while holding or holding the stationery. The heating wire height changing mechanism is operated to sequentially move a required number of the eight electric wires waiting in the insulated part of the electrode rod to a desired position in the conductive part, and then return them to their original positions. The device is characterized in that it is equipped with a control device for returning it.

The cutter device of the present invention usually includes an electrode rod and a support.

Although it is equipped with a pair of left and right heavy stationery, a tensioning means, a clamping member, a drive motor, a heating wire height changing mechanism, etc., it is preferable that these left and right members or devices be provided so that they operate in conjunction with each other.

The heating wire is a thin metal wire called a heat wire, usually 0.48 mmφ to 0.32 mmφ.
Nichrome wire rod is used.

The electrode rod of the present invention is divided into a conductive part and an insulating part. The conductive part is the part that receives electricity from the power source via the electrical wiring connected to the electrode rod.

A large number of narrow grooves extending in the horizontal direction are vertically connected 21i in length, for example, from 0.5 mm to 1.5 mm. They are formed with a pitch of 0.0 mm, and the heating wire can be hung thereon. In addition, there are parts of the insulation section that are not energized,
For example, it may be made of insulating material such as ceramics, or
Alternatively, an insulating layer is formed on the surface of the electrode rod. Is the insulation part normal? ! ! Provided at the top or bottom of the pole.

The pillar is made of a metal rod, such as a stainless steel cup, to which a predetermined number of heavy stationery items are attached so as to be able to move up and down.

The heavy stationery consists of a member, such as a synthetic resin plate, which is connected to both ends of the heating wire through tension means. The tension means is made of, for example, a coil spring or a rubber material, and preferably has the function of always keeping the tension applied to the electric wire 8 constant. Therefore, in the present invention,
Each electric fJI! The wires are hung on the left and right electrode rods, and are stretched horizontally between the funeral stationery on the left and right pillars.

The electrode rod and support are erected at an angle of less than 80° to 90° with respect to the horizontal, slightly tilted toward the resin foam to be processed, in order to eliminate differences in cut thickness caused by deflection of heating wires, etc. Or preferable.

The heating wire height changing mechanism is provided on both the left and right sides of the base, or the clamping member that is a part of the mechanism is preferably capable of holding or hanging the heating wire and heavy stationery together. good. A pinching member may be provided, for example, an air cylinder device or a solenoid device to bring the device closer to or away from the heating wire and heavy stationery. Similarly, drive motors for the same components include, for example, servo motors, which are provided one each on the left and right sides of the five bases, and are used, for example, to vertically move the above-mentioned clipping member, air cylinder device, and the like.

Further, the control device includes a sequencer, a computer, etc., which are programmed to perform the above-mentioned functions.

Utilizing the present invention, it is also possible to use a device having a structure similar to that described above, in which a heating wire is stretched vertically and is moved in the left-right direction by the operation of a pinching member, a drive motor, or the like.

The device of the present invention further includes laying a rail on the top surface of the base,
It is preferable to provide a movable platform on which the resin foam blocks are placed so as to be movable along the rails, and it is even better if the movable platform is provided with a fixture to suppress the displacement of the blocks.

(Function) The device of the present invention provides all electric power during non-normal rotation. Stretch the wire at the insulated part of the electrode rod. And when driving,
By the operation of the heating wire height changing mechanism and the control device, the required number of heating wires waiting in the insulated part of the electrode rod are sequentially moved to a desired position on the conductive part and kept stretched horizontally. After the heating wire is energized via the 1rL pole rod, the resin foam flock passes through the left and right electrode forests and is fused.

In the present invention, since the height of the heating wire is changed by a mechanism equipped with a pair of left and right drive motors, etc., the mechanism is simple, and the required number of 7tt heating wires can be controlled by a control device (computer). Since the heating wire spacing can be stretched and arranged at various intervals according to the input data, it is possible to simultaneously melt and cut product flocks of various thicknesses from a single coarse resin foam flock. can.

Furthermore, since the device of the present invention is divided into an electrode rod and a conductive part and an insulating part, by stretching the heating wire that is not used during operation at the position of the insulating part, electricity is not applied to them. Therefore, no electric bacterium loss occurs.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, the automatic hot wire cutter device of the embodiment has a
Two electrode rods 2.2 and two wooden stainless steel columns 3.3 are respectively erected on the outside thereof, and a predetermined number of heavy stationery 9 made of synthetic resin plates are attached to the left and right columns 3.3. It is attached so that it can move up and down (direction of arrow Y), and O132
A predetermined number of heating wires made of nichrome wire of mmφ are hung on the left and right electrode rods 2.2, and the left and right tension supports 9.9 are
They are each stretched horizontally with coil springs 6 of tension means interposed therebetween.

The electrode rod 2 consists of an upper insulating part 4 and a lower conductive "trL" part 5. The insulating part 4 is formed by coating an insulating layer,
Further, the conductive portion 5 is formed by cutting a large number of horizontal grooves vertically at a pitch of 0.5 mm.

Further, the apparatus of the embodiment is equipped with a heating wire height changing mechanism as shown in FIG. 3 on both the left and right sides of the base 10, and a control device is connected to the mechanism.

The changing mechanism includes a pinching member 19, an air cylinder 8 that is coupled to the member 19 and moves in the horizontal direction (arrow ±X directions) so as to approach and separate it from the heating wire l and the condolence letter A9, It consists of a servo motor 7 that moves a blanket 11 to which a blanket 8 is fixed in a direction down the hill (in the direction of arrow Y in FIG. 1).

Furthermore, the clip member 19 is provided with a holding wind 14 (Fig. 4) for holding the heating wire l at one end, and a holding claw 15 (Fig. 5) for holding the heavy stationery 9 at the other end. It becomes. The operation of the servo motor 7 is electrically controlled by an electric signal p from a sequencer 12 of the control device, and the operation of the air cylinder 8 is pneumatically controlled by an air signal 9 from the sequencer 12. The sequencer 12 is connected to the computer 13, and in response to its calculation function and input data thereto, operates the air cylinder 8 to hold the heating wire 1 with the clamping member 19 and clamp the heavy stationery 9. Then, by the action of the servo motor 7, they are moved up and down as they are, and the heating wire 1 located in the insulated part 4 of the electrode rod 2 is sequentially moved to a desired position in the conductive part 5, and then returned to its original position in the insulated part 4. control (details are described below).

Furthermore, the device of the embodiment has a rail 1 as shown in FIG.
7 is laid on the inclined surface E of the base 10, and a movable table 16 is provided on the rail 17 via a roll bearing 18 so as to be freely movable so as to pass between the left and right electrode rods 2, 2.

The movable table 16 is fixed with a rough-shaped flock F of resin foam placed thereon, and is controlled by a drive device (not shown) to pass between the left and right electrode rods 2, 2 in a timely manner in coordination with the above-mentioned control device. It is configured.

Next, how to use this device will be explained.

Initially, all the heating wires 1 are set so as to be located on the insulating part 4 of the electrode rod 2.

First, we need the necessary data, such as: ■ Dimensions (width, height) of the rough block F of resin foam, ■ Dimensions of the selvedge of the block part that is not used, ■ Diameter of the heating wire l and the current value to be applied. Input into the computer 13 the dimensions of the melting margin, and (1) the thickness and number of desired product blocks.

The computer 13 calculates the required number of plow heating wires and the height at which each heating wire should be stretched based on these input data.

According to the calculation results of the computer 13, the sequencer 12 first sends an air control signal to the air cylinder 8, operates it in the +X direction of the arrow, and holds the heating wire l with the clamping member 19 as shown in FIG. The heavy stationery 9 is held between the members 19 as shown in FIG.
9, while holding the heating wire l and the heavy stationery 9, move it up and down together with the air cylinder 8 (in the direction of arrow Y), then operate the air cylinder 8 in the opposite direction to the above (direction of arrow -X) to Hang the hot wire l on the electrode rod 2.2.

The heating wire l is stretched horizontally at the calculated position of the conductive part 5. The heating wires 1 . . . are stretched in sequence by the action of the sequencer 12 and the like. After the tensioning is completed, electricity is applied to the required number of heating wires l through the conductive part 5.

Thereafter, by operating the moving table 16, the rough block F is passed between the left and right electrode rods 2.2, and the heating wire L.
・ Process the block product to the desired thickness by melt cutting.

After the fusing process is completed, the sequencer 12 controls the servo motor 7.
Then, the air cylinder 8 and the like are operated to sequentially return the stretched heating wires l... to their original positions in the insulating section 4.

In the cutter device of the embodiment, each heating wire can be stretched between the left and right electrode forests in a manner that varies depending on the mutual line spacing or human data input to the computer 13, and therefore resins of various thicknesses can be stretched. It has been possible to obtain foamed flock products simultaneously and with high precision through a single fusing process. Furthermore, the device of the present invention only needs to apply current for the number of heating wires actually used for cutting, which greatly reduces the amount of electricity required for processing, and furthermore, the lifespan of the 8 wires is longer than before. It became noticeably longer.

(Effects of the Invention) As explained above, the automatic hot wire cutter device of the present invention can accurately and sequentially stretch a plurality of heating wires at various wire intervals by the action of the sandwiching member, the drive motor, etc. Product blocks of various thicknesses can be melt-cut at the same time, and the thickness accuracy of the resulting block products is also very high. Furthermore, since a pair of left and right drive motors is sufficient as a mechanism for arbitrarily changing the height of the heating wire, the mechanism and the entire apparatus are greatly simplified and miniaturized. Furthermore, such automation greatly improves the workability of fusing processing, and therefore it can be satisfactorily adapted to high-mix, low-volume production.

In addition, during processing, the cutter device of Suekan 11Jj stretches the required number of heating wires at the conductive part of the electrode bar and energizes it, while stretching unused heating wires at the insulating part of the electrode bar. Since it is possible to prevent the current from being energized, the energization loss can be significantly reduced, and the operating cost ('ilii air) can be reduced.
It is extremely advantageous in terms of

[Brief explanation of the drawing]

1 [, 121 and 2 are front and side views showing the automatic hot wire cutter device according to the embodiment of the present invention, and FIG. 3 is the fS wire automatic cutter device shown in FIGS. 1 and 2. i! Figures 4 and 5 show the heating wire height changing mechanism, and show the process of holding the heating wire and the heavy stationery using the clamping member in the automatic hot wire cutter device shown in Figures 1 and 2. FIG. In the figure, l... Heating wire 2... Electrode rod 3... Support 4... Insulating section 5... Electrode section 6... Spring 7... Servo motor (drive motor) 8...・Air cylinder 9...Heavy stationery lO...Base 11...Flanget 12...Sequencer 13...Computer 14...Holding wind 15...Holding claw 16...Moving table 17・φ・Rail 18...Roll bearing 19...Pinch member F...Resin foam block ±X...Movement direction of sandwich member Y...Moving direction of heating wire A...Resin foam block Movement direction p...Electric control signal q...Air control signal 1st tJ 1 Electric light! I 8 Air cylinder 2 Electrode rod 9 Heavy stationery 3
Pillar 10 Foundation 4 e
Ball F Resin light beam 0 work 51!澾IJII ±X Movement direction of the 挾d member 6 Hane Y -Electric! ! : Line movement direction 7 Drive motor Fig. 2 Fig. 5 C4 Xπ4 Fig. 3 Fig. 13 Controller ρ Electric control signal 14

Claims (1)

[Claims] A pair of electrode rods and a pair of pillars are respectively installed on the left and right sides of the upper surface of the base, and a predetermined number of small diameter heating wires are respectively installed,
It is hung on the left and right electrode rods, and is tensioned between a predetermined number of left and right tension supports that are attached to the left and right columns so as to be able to move up and down, and is also provided with a clamping member and a drive motor. , a heating wire height changing mechanism is provided on each of the left and right sides of the base for moving the pinching member closer to and away from the heating wire and the tension support, and moving the heating wire height up and down while holding or hanging them; The electrode rod is divided into a conductive part and an insulating part, and the heating wire height changing mechanism is operated to move a required number of heating wires from among the heating wires waiting in the insulating part of the electrode rod to a desired position in the conductive part. An automatic hot wire cutter device characterized by comprising a control device that sequentially moves the cutter to different positions and then returns it to the original position.