JPS60937A - Electromagnetic induction continuous welding machine - 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] Technical Field This invention is made of thermoplastic resin material? ! Regarding a welding machine that welds several layers of sheet-shaped processed materials to each other by applying heat to the sheet-shaped processed materials and pressing and sandwiching the processed materials against each other,
In particular, it is equipped with a roller cap transfer device for transporting the welded sheet-shaped processing materials in one direction, and is capable of continuously applying welding to the sheet-shaped processing materials. δ related to welding processing machines.

BACKGROUND TECHNOLOGY Conventionally, this type of welding machine has been equipped with a welding machine that uses a welding machine such as a heater or the like that is placed in advance along the supply path of the sheet-shaped material supplied from the supply source. After applying heat to the sheet-shaped processed material 1'+1, the sheet-shaped processed material 1'+1 is pressed and held between a pair of opposing rollers, and the rollers are rotated in one direction to form the sheet-shaped processed material. There have already been provided products in which a continuous welding process is applied to the material. However, in the conventional apparatus described above, indirect radiant heat is applied to the sheet-shaped processed material passing through a heat source such as a heater, so the feeding speed of each processed material passed through is not constant. In some cases, the optimum heat can be applied approximately evenly to the seam-shaped processed material, but if the feeding speed is changed or stopped midway through, even if the set temperature of the heater is changed. However, the temperature of the heater does not change quickly, so T1 is applied to the processed material.
3a In cases where uniform heat cannot be applied and the supply rate is extremely reduced, the processed material may end up being melted in the heat source of the heater q. In addition, in the conventional device J3 mentioned above, since it takes time for the heat source such as a heater to reach a substantially constant temperature, there is a loss of time for preheating at the start of work, etc. Moreover, since indirect radiant heat is applied over a wide area to the sheet-shaped processed material, only a small portion of the amount of heat is actually applied to the processed material, which poses the problem of extremely poor thermal efficiency. Met.

In addition to the above-mentioned welding machines, there are also
Without applying heat to the sheet 1-shaped workpiece 131 in advance, a presser roller arranged to be able to press and hold the sheet-like workpiece is heated, and the sheet-like workpiece is directly heated by the heated presser roller. Various methods have been proposed in which the sheet 1 is welded to the sheet material, but the mechanical structure is complicated when an electric heater is placed inside the presser roller to directly heat the material. Not only that, but there are also problems with the durability of the electrical contacts, etc. that supply current to the heater, and the presser roller is indirectly heated and heated by the heater, etc. placed close to the presser roller. In the case of a roller that is mounted on a roller, there are problems such as not only poor thermal efficiency but also the inability to quickly control the surface temperature of the presser roller and extremely poor controllability, all of which are impractical. It was something.

Purpose This invention was made in order to solve various problems in the above-mentioned conventional devices.
An electromagnetic induction device including an electromagnetic coil for attaching a conductor to the outer periphery of at least one of the second rollers and generating an eddy current in the conductor to generate heat in the conductor is heated with acid. At the same time, we decided to drive one of these rollers to rotate, which would improve the controllability of the temperature of the roller and improve its thermal efficiency.Moreover, the mechanical structure is simple and durable. The purpose is to provide an excellent electromagnetic induction continuous welding machine.

Embodiment The details of an embodiment of the present invention will be explained below based on the drawings.

In FIG. 1, a machine frame 1 includes a head part 1a and a bed part 1b, and is placed on a table 2.

A roller support member 3 is provided on the left side of the bed portion 11).
is located. The roller support part 83 has a substantially prismatic shape and has a flange part 3a formed at its lower end, and is fixed to the bed part 1b by a screw 4 through J3 to the flange part 3a, and rotatably supports the row 55 at its upper end. A pair of bearing grooves 3b, 31) are formed for ``vJ''rJ. The endless belt 5c is made of foamable silicone rubber and has a processed surface 5d formed on its outer periphery.

A presser roller 6 having a rotational axis substantially parallel to the roller 5 is disposed above the opening 5 so as to face the processing surface 5 (1).
The outer periphery of the annular body 6b is covered with an endless belt 6a made of foamed nitrile rubber and an annular body 6I) made of iron as a conductor closely arranged around the outer periphery of the endless belt 6a. A thin silicone rubber layer 6c is attached to the shaft 7, and the shaft 7 is attached to a roller support 8.
is rotatably supported. A boulder 10 is fixed to the roller support 8 by screws 10a, 10a, for holding the electric fitting forward conduction device 9 via a core 9a and a coil 91 wound around the core 9a. The core 9a
has bent portions 9c, 9 at each tip as shown in FIG.
c, and each of its bent tips 9d and 9d extends to a position close to the side portions ebt and 611' of the annular body 6b of the presser roller 6, and both side portions 6b' and 6
It is arranged opposite to b'.

Therefore, when an alternating current is applied to the -1 coil 9b, the magnetic flux generated is
d, side part 6b', annular body 61), side part 6b', tip 9 (
1. The core 9a is passed through a magnetic circuit, and an eddy current flows in the annular body 6b as the magnetic flux changes, and the annular body 6b generates heat based on the eddy current loss. ing.

The roller support 8 is connected to a presser foot 11 to which a downward pressing force is always applied by a spring (not shown), and when the presser foot lifting lever 12 is operated, the roller support 8 is raised as shown in FIG. The stage f
] A gear 13 is fixed to the spindle 7, and as the morph 14 attached to the lower surface of the table 2 rotates, a stepped @7 is rotated so that the presser roller 6
It is configured so that it can be rotated.

A reel support 18 is fixed to the left end of the upper surface of the head ia, and a reel 20 on which a 1-wear tape 19 is wound is loaded onto the reel support 18. Similarly, a guide bin 21 is disposed on the front side of the upper left end portion of the head 1a, and a tape guide 22 is disposed in which a notch 22a is formed in the entire jaw portion of the sewing machine head 1a at the front side.

FIG. 5 shows an electric circuit in this embodiment. 30 is an inverter, which is operated by a DC power source rectified from an AC power source 32 to a rectifier circuit 31, and an oscillation circuit built in the inverter 30. (Ultrasonic frequency (20KHz to 50KHz)
This is for supplying an alternating current to the coil 9b. This is for outputting a control signal for controlling the oscillation frequency of the oscillation circuit in the inverter aO to the control circuit 331, and includes a pyroelectric detection element (for detecting the surface temperature of the presser roller 6C). The oscillation frequency of the oscillation circuit in the inverter 30 is adjusted based on the temperature signal from the temperature detection circuit 34 including the annular body 6b (not shown).
The structure is such that the amount of heat generated by the annular body 6b can be reduced to 11 by changing the eddy current loss due to the change in the effective impedance of the annular body 6b. Next, the operation of the present apparatus configured as described above will be explained below.

First, the tape material, thickness, width, etc. are selected according to the tape sewing work of the workpiece material W/\, and the selected sewing tape is wound around the tape 20. After the reel support 18 is loaded, the roller support 8 including the electromagnetic induction device 9 and the presser roller 6 is moved based on the operation of the presser foot lifting lever 12.
As shown in FIG. 1, the outer peripheral surface of the presser roller O is raised to a raised position away from the processing surface 5d. Next, as shown in FIG. 1 and FIG.
The sewing tape 19 is bent in the guide bin 21, and the tip of the arp 19 is positioned between the processing surface 5d and the presser roller 6.

Next, the workpiece yI4w is placed on the workpiece surface 5, and the tip of the sewing arp 19 is positioned at the desired sewing position on the workpiece 1'ilW. 6 is lowered to the position shown in FIG.
7 and processed material F31. Press and hold W. Next, based on the operation of an operation pedal (not shown), the inverter 3
AC current (20KI-lz
~50KHz > Energize 2! Set, core 9a1 circular rest 6
By passing a magnetic flux through the magnetic circuit consisting of the annular body 6b, an eddy current is generated in the annular body 6b, and the annular body 6
b starts the motor 14 while generating heat;
By rotating the presser roller 6 in one direction via the belt 75, shaft 16, belt 17, shaft 7, etc., the workpiece W and the sewing arm 19 held between the presser roller 6 and the roller 5 can be rotated in one direction. As the machine rotates, the machine is fed eight times in one direction, and the stitching work of the N wearer 119 to the workpiece FIW is performed continuously as shown in FIG. 2.

At this time, if the depression m of the pedal (not shown) is increased and the rotational speed of the motor 14 is upper bound, the temperature of the annular body 6b is temporarily lowered, and the temperature detection circuit 34 detects the temperature. When the drop signal is detected, the oscillation frequency of the oscillation circuit is lowered based on the comparison result with the temperature setting device 3a, and the amount of heat generated based on the eddy current loss is increased. The temperature of the annular body 6b is raised and kept substantially constant, so that substantially uniform welding can be performed.

Incidentally, in the above embodiment, the surface temperature of the position where the annular body 6b actually generates heat is detected based on the generation of eddy current due to the energization of the coil 91). However, the heat generation position and the humidity detection position are deviated by the rotational angle of the presser roller 6, and the Iζζ assembly detects the rotational angular position of the presser roller 6 in order to detect the deviation angle.
An angular position detection circuit may be provided to compensate for the deviation angle and control the energization m to the coil 91).

Further, in the above embodiment, the frequency of the inverter 3o is set to the ultrasonic frequency (20KHz to 50Kf-Iz).
, but this frequency is not necessarily limited to this ultrasonic frequency, but may be any frequency as long as it is an alternating current; however, the oscillation frequency may be changed by the output adjustment circuit of the inverter 30. Although an example has been shown, it goes without saying that the amplitude of the output voltage may be adjusted.

-Also, in the above embodiment, an example is shown in which only the 1ψ pressing roller 6 is driven to rotate when the 1' electric body is mounted only on the presser row 56 as the first roller. However, the roller 5 serving as the second roller may also be equipped with an i9 electric body, or the roller 55 may be driven to rotate.

Effect As stated by Kudo, this invention is arranged facing each other! ,: A conductor is attached to the outer circumference of at least one of the first and second rollers, and electromagnetic induction heating means is provided to generate eddy current in the conductor and generate heat in the conductor. One of these rollers is rotated to apply continuous welding to the workpiece r1, which improves the controllability of the eddy current of the roller.
,,t! ′? and improve its thermal efficiency.
However, the mechanical structure is extremely simple and the durability is improved. The continuous induction head welding machine can be provided at low cost and has great industrial effects.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a side view of the device showing sewing work performed by the present device, and Figs. 3 and 4 are enlarged views of main parts of the invention. A perspective view and a sectional view, and FIG. 5 are block diagrams showing a control circuit of this device. In the figure, 1 is the machine frame, 5 is the roller, 6I presser roller, 6b
is an annular body, 8 is a [1-ra support body, 9 is an electromagnetic induction device 9
a is the core, 9b is the electromagnetic coil, 10 is the holder, 1/I
is a motor, 30 is an inverter, 33 is a control circuit, 3/I
is a temperature detection circuit. Patent applicant 1st F2! Figure 2

Claims (1)

[Claims] 1. A first roller rotatably supported around a -@ line; and a first roller rotatably supported around an axis substantially parallel to the rotational axis of the first roller. A second roller disposed close to the first roller and at least one of the first and twentieth rollers are provided with a conductor made of a conductive material on the outer periphery thereof. and an electromagnetic induction heating means including an electromagnetic coil for generating an eddy current in the conductor to cause the conductor to generate heat; a rotary drive means for rotationally driving the connected loan in one direction, and a sheet-like processing unit 44 N'3+ arranged between the first and second rollers.
A control device sends a drive signal to the rotary drive means to transfer the material in one direction, and also supplies an alternating current of 2Af to the electromagnetic coil to generate heat in the conductor. An electromagnetic induction continuous welding machine characterized by not applying continuous welding. 2. The control device further includes a temperature detection means arranged close to at least one of the first and second rollers to detect the temperature of the outer peripheral surface of the respective roller, and detects a detection signal detected by the detection means. 2. The electromagnetic induction continuous welding machine according to claim 1, further comprising an adjustment circuit that adjusts the frequency of the alternating current supplied to said electromagnetic coil based on said electromagnetic coil. 3. The conductor is an annular body made of iron and is formed so as to cover the outer circumferential surface of the first roller, and the first roller has a rotating shaft and a The electromagnetic induction continuous welding according to claim 1 or 2 is characterized in that an annular heat insulating member is disposed in the electromagnetic induction continuous welding device.