JP3436136B2 - Induction heating fusion machine and operation method of induction heating fusion machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating fusing machine for heating a horn with an induction heating coil and pressing the horn against a work to fuse the work, and a method for operating the induction heating fusing machine. It is about.

[0002]

2. Description of the Related Art Some automobile interiors, such as door trims, are decorated by attaching a carpet or a fabric to the surface of a core material (molding material) of a thermoplastic resin. Conventionally, the core material and the carpet were joined by an adhesive, a tacker, etc., but the application of the adhesive,
It was necessary to perform crimping and tacking at the end, and the number of steps was large. Therefore, the present applicant has filed Japanese Patent Application No. 9-2024.
No. 67 proposed a technique for joining a fabric to a thermoplastic resin by high frequency induction heating.

In this technique, as shown in FIG.
50α and an induction heating coil 132α that induction-heats the horn 150α are arranged to face each other, the core material 10 and the carpet 20 are inserted between the horn 150α and the induction heating coil 132α, and the heated horn 150α is pressed. As a result, the core material 10 and the carpet 20 were fused. Here, in order to firmly fuse the core material 10 and the carpet 20, it is necessary to properly adjust the heating temperature of the horn 150α. Therefore, a change in the magnetic flux from the induction heating coil 132α is detected by the pickup coil 154 arranged on the horn 150α side, and a timer is controlled based on the detection result to control the timing of stopping energization of the induction heating coil. .

That is, as shown in FIG. 9, a change (a steep rise) A of magnetic flux (pickup coil electromotive force) is detected, and when a predetermined time T2 elapses by a timer setting from the detected timing t1, the induction heating coil is detected. 132α
The temperature of the horn 150α was controlled by stopping the power supply to the horn 150α.

[0005]

Here, in order to firmly bond the core material 10 and the carpet 20 to each other, it is necessary to narrow the interval of the bonding. For this purpose, as shown in FIG. The horn must be placed close to. However, if the horns are placed close to each other with a pitch of 70 mm or less,
The interference of the magnetic flux from the adjacent induction heating coil makes it difficult to detect the change of the magnetic flux by the above-mentioned pickup coil 154. Therefore, the present applicant alternately heats adjacent horns and performs fusion bonding every other point. That is, first, the horn 150α is heated by energizing the first induction heating coil 132α shown in the drawing,
The timing of stopping the energization of the first fusion horn 150α is detected (time t1 shown in FIG. 9), and the energization of the first induction heating coil 132α is stopped when the time T2 has elapsed from the timing t1 by the timer setting. To do. The second
The second fusion horn 150β is heated by energizing the induction heating coil 132β, and the timing of stopping the energization of the second fusion horn 150β is detected (time t2 shown in FIG. 9), and the timer is set from the timing t2. When the time T2 had elapsed, the energization of the second induction heating coil 132β was stopped. Therefore, the fusion cycle time is doubled, and the productivity is reduced.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an induction heating fusion machine and a method of operating the induction heating fusion machine which can shorten the cycle time. To do.

[0007]

In order to achieve the above-mentioned object, the method of operating an induction heating fusion machine according to claim 1 has first and second fusion horns arranged adjacent to each other and the first and second fusion horns. A method for operating an induction heating fusion machine, comprising: first and second induction heating coils for respectively induction heating the deposition horn, wherein the first and second fusion horns are between the first and second induction heating coils. The work is inserted by pressing the first and second fusion horns onto the work by heating the first and second fusion horns with the first and second induction heating coils. In the method for operating an induction heating fusion machine, after energizing both the first induction heating coil and the second induction heating coil at the same time, the energization of the second induction heating coil side is stopped, and then the first induction heating coil The timing of stopping energization is detected on the side of the first fusion horn based on the change in magnetic flux, and The energization of the electrically heating coil is stopped, the energization of the second induction heating coil, resumed after detecting the timing of the energization stopping the first induction heating coil, the first
After stopping the energization of the induction heating coil, the timing of stopping the energization of the second induction heating coil is detected on the second fusion horn side based on the magnetic flux change, and the energization of the second induction heating coil is stopped. Characteristic.

Further, the operating method of the induction heating fusion machine according to claim 2 is characterized in that, in claim 1, the timing of stopping the energization of the second induction heating coil is controlled by a timer.

In the method for operating an induction heating fusion machine according to a third aspect of the present invention, in the first or second aspect of the present invention, after detecting the timing of de-energization of the first induction heating coil, the first induction heating coil is applied to the first induction heating coil. It is a technical feature to restart the energization of the second induction heating coil while continuing the energization.

Further, in the induction heating fusion machine of claim 4, the first and second fusion horns adjacent to each other and the first and second induction horns for induction heating the first and second fusion horns, respectively. An induction heating fusion machine comprising a heating coil, wherein a work is inserted between the first and second fusion heating horns and the first and second induction heating coils to form the first and second fusion horns. In an induction heating fusing machine for fusing a work by pressing it onto a work and heating the first and second fusing horns with first and second induction heating coils, (a) first fusing horn side And a first detection device for detecting a change in magnetic flux from the first induction heating coil,
(B) a second detection device arranged on the second fusion horn side to detect a change in magnetic flux from the second induction heating coil;
An energization control unit for controlling energization of the first induction heating coil and the second induction heating coil, wherein the first induction heating coil and the second induction heating coil are energized at the same time, and then the second induction heating coil is energized.
After stopping the energization of the induction heating coil side, the timing of stopping the energization of the first induction heating coil is detected by the first detection device based on the magnetic flux change, and the energization of the first induction heating coil is stopped, The energization of the two induction heating coils is restarted after detecting the timing of stopping the energization of the first induction heating coil, and the timing of stopping the energization of the second induction heating coil is set after the energization of the first induction heating coil is stopped. And a power supply control device that stops the power supply to the second induction heating coil by detecting the change in the magnetic flux by the two detection devices.

In the induction heating fusion machine and the method of operating the induction heating fusion machine of the present invention, after the energization of the second induction heating coil side is stopped, the timing of the energization stoppage of the first induction heating coil is set to the first fusion welding. The horn side detects based on the change in magnetic flux and
Stop energizing the induction heating coil. That is, since the energization of the second induction heating coil is temporarily stopped and the timing of energization of the first induction heating coil is detected without being affected by the magnetic flux from the second induction heating coil, the energization stop timing is detected. Can be accurately determined. Similarly, when the timing of stopping the energization of the second induction heating coil is detected on the side of the second fusion horn based on the change in the magnetic flux, the energization of the first induction heating coil has already been stopped, so the energization is accurately stopped. The timing of can be detected. Here, first, both the first induction heating coil and the second induction heating coil are simultaneously energized, the second fusion horn is heated to some extent in advance, and then the energization of the second induction heating coil is temporarily stopped. , After detecting the timing of stopping energization of the first induction heating coil in a state where it is not affected by the magnetic flux from the second induction heating coil,
Energization of the second induction heating coil is restarted. Therefore, the second fusion horn can be heated to a temperature at which fusion can be performed immediately after restarting the energization, and fusion by the first and second fusion horns can be completed in a short time. Therefore, the cycle time of the induction heating fusion machine can be shortened.

In the method of operating the induction heating fusion machine according to the second aspect of the present invention, since the timing of stopping the energization of the second induction heating coil is controlled by the timer, the timing of stopping the energization can be accurately controlled.

According to a third aspect of the present invention, in the method for operating an induction heating fusion machine, after detecting the timing of stopping energization of the first induction heating coil, while continuing energization of the first induction heating coil,
Since the energization of the second induction heating coil is resumed, the second fusion horn can be heated to a temperature at which fusion can be performed immediately after the energization is resumed, and the first and second fusion horns can be used in a short time. Fusing can be completed.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a plan view of a door trim 20 to which a carpet is fused by an induction heating fusion machine according to the embodiment. The door trim 20
Is made of PP (polypropylene) resin and has 35
Point fusion points are provided. That is, the first to seventh fusion points on the right edge, the eighteenth and nineteenth fusion points on the center, the twenty to twenty-fourth fusion points on the left edge, and the eighth to seventeenth edges on the lower edge in FIG. Fusing point and upper edge 25th to 3rd
5 fusing points are provided.

FIG. 2 shows the structure of an induction heating fusion machine for fusing the door trim 20. The induction heating fusion machine has a control device 60 for controlling the whole, first to seventh fusion points on the right edge in FIG. 1, 18th and 19th fusion points in the center, and 20th on the left edge. -A table 62A for fusing the 24th fusion point, B table 62B for fusing the 8th-17th fusion points of the lower edge, and 25th-35th fusion points of the upper edge And a C table 62 for fusing. That is, the door trim 20 has three
Since it is formed dimensionally, it is impossible to arrange all the horns described below on one table.
Table 62A, B table 62B, C table 62C
It is divided into The fusion of the above-mentioned first to thirty-fifth points is performed in three times on these three tables. Here, first, the A table 62A is horizontally moved to the position of the door trim 20 as shown by the broken line in the drawing to perform fusion bonding, and then returned to the origin position shown by the solid line. Similarly, the B table 62B and the C table 62 are sequentially fused.

FIG. 3 is a door trim 2 shown by a broken line in FIG.
The GG cross section of A table 62A in the state which moved to 0 is shown. The A table 62A includes a lower mold 30 configured to fit the three-dimensional shape of the door trim 20, and an upper mold 40 formed to match the shape of the lower mold 30.
The A table 62A includes the upper mold 40 and the door trim 20.
Is formed so that the lower side 30 enters the lower side of the door trim 20. A plurality of high-frequency fusion-bonding first fusion horns 50α and second fusion-bonding horns 50β are arranged on the upper mold 40 via air cylinders 42. On the other hand, the lower die 30 is provided with a first induction heating coil 32α and a second induction heating coil 32β for high frequency generation corresponding to the first and second fusion horns 50α and 50β.

The first and second fusion horns 50α and 50β are
It is made of iron, which is a magnetic material, and has a columnar shape so that heat can be generated by an eddy current when a high frequency is applied. Also,
A ring-shaped stopper 52 is attached to the fusion horns 50α and 50β. The stopper 52 is made of a metal member such as low magnetic iron or aluminum, and has a pair of corners 52a extending downward. In this embodiment, the stopper 52 is provided to regulate the insertion amount (insertion length) of the fusion horn,
It prevents α and 50β from penetrating the surface of the carpet 10. Pick-up coils 54α, 54β are arranged on the stopper 52, and induction heating coils 32α,
It is configured so that a change in magnetic flux from 32β can be detected.

A carpet 10 is disposed on the lower mold 30, and a thermoplastic PP (polypropylene) resin 20 forming a door trim is laid on the carpet 10 with a nonwoven fabric 18 interposed therebetween. . The carpet 10
The nylon bristles 12 are planted on a base cloth 14, and a PE backing 16 made of a thermoplastic PE (polyethylene) resin is arranged on the back surface side of the base cloth 14.
Prevents hair loss of 2.

For convenience of illustration, only a part of the lower mold 30 and the upper mold 40 is shown, but the lower mold 30 and the upper mold 40 have three-dimensional curved surfaces formed according to the shape of the door trim 20. A large number of fusion horns 50α and 50β along the curved surface
Is provided.

Here, the fusion by the induction heating fusion machine shown in FIG. 3 will be described again with reference to FIG. 4 showing a part of FIG. First, as shown in FIG. 4 (A), the air cylinder 42 is operated to press the first fusing horn 50α and the second fusing horn 50β to the door trim 20 side, and
The induction heating coil 32α and the second induction heating coil 32β are simultaneously energized to generate the first and second fusion horns 50α and 50β.
To start heating. Then, when the predetermined time T1 has elapsed due to the timer setting, the power supply to the second induction heating coil 32β is stopped.

After that, as shown in FIG. 4B, the door trim 20 is melted by the heat of the first fusion horn 50α and the first
When the fusion horn 50α is inserted into the carpet 10 side,
The magnetic flux from the first induction heating coil 32α changes rapidly,
The first fusion horn 5 is formed by the first pickup coil 54α.
The timing of stopping energization to 0α is set to the first induction heating coil 3
It is detected based on the change in magnetic flux from 2α, and after this detection, the second
The energization of the induction heating coil 32β is restarted. Then, after the change of the magnetic flux is detected by the timer setting, when the time T2 elapses, the energization of the first induction heating coil 32α is stopped.

Finally, as shown in FIG. 4 (C), the door trim 20 is melted by the heat of the second fusing horn 50β and the second
When the fusion horn 50β is inserted into the carpet 10 side, the magnetic flux from the second induction heating coil 32β suddenly changes, and the timing of stopping the energization of the second fusion horn 50β by the second pickup coil 54β. Is detected based on the change in the magnetic flux, and when the time T2 elapses after the change in the magnetic flux is detected by the timer setting, the energization of the second induction heating coil 32β is stopped and the first and second fusion horns 50α and 50β are turned on. After cooling, the air cylinder 42 is controlled to control the first and second air cylinders.
The fusing horns 50α and 50β are pulled up, and the fusing work is completed.

The detection of the timing of stopping the energization of the induction heating coil described above will be described. If the heating is stopped when the temperature of the fusing horn is low or after it becomes too high, the fusing force varies. Further, the appearance of the fusion-bonded portion is deteriorated due to the variation in temperature, and particularly when the temperature is too high, the resin may flow out to the surface side of the carpet 10.

Therefore, in the present embodiment, the pickup coils 54α and 54β are wound around the outer periphery of the stopper 52 described above with reference to FIG.
By monitoring the electromotive force of the fusion horns 50α and 50β at α and 54β, the temperature of the fusion horns 50α and 50β is controlled, and the temperature of the fusion horns is controlled to exert the highest fusion force. The fusion force is uniform.

The first pickup coil 54α has a first
The electromotive force generated by the magnetic flux from the induction heating coil 32α will be described with reference to the graph of FIG. First,
At time 0, the induction heating coil 32 shown in FIG.
A high frequency is applied to α and 32β to start heating the fusion horn 50α. By applying a high frequency, the temperature of the fusion horn 50 rises, and the electromotive force gradually rises (time 0 to C2), the door trim 20 made of PP resin begins to melt, and the fusion horn 50α slightly generates high frequency. The electromotive force generated in the pickup coil 54α further increases toward the induction heating coil 32α side (time C2 to A). here,
When the door trim 20 is completely melted, the fusion horn 50
α rapidly approaches the induction heating coil 32α for high frequency generation, and the electromotive force rapidly increases (time A to D). At the time (time B) when a predetermined time (T2) has passed from the time A when the electromotive force suddenly rises, the application of the high frequency is stopped, that is, the time between time A and time B is controlled, so that the first fusion The temperature of the fusion horn 50α is controlled and the temperature of the fusion horn is controlled so as to exert the highest fusion force.

Continuing on, the flowchart of FIG. 5 and FIG.
The operation method of the induction heating fusion machine described above with reference to FIG. 4 will be described in more detail with reference to the timing chart of (A). First, the control device (see FIG. 2) 60 operates the air cylinder 42 as shown in FIG.
The first fusion horn 50α and the second fusion horn 50β are pressed against the door trim 20 side, and the first induction heating coil 3
2α and the second induction heating coil 32β are simultaneously energized,
The heating of the first and second fusing horns 50α and 50β is started (S12). Then, a timer that sets the stop of energization of the second induction heating coil 32β is started (S14). The first induction heating coil 32α and the second induction heating coil 3
With the start of energization of 2β, the first and second fusion horns 50α,
As the temperature of 50β rises, the magnetic flux of the first induction heating coil 32α detected by the first pickup coil 54α arranged in the first fusion horn 50α as shown by the curve α in FIG. Power) rises as well as the curve β
The electromotive force of the second pickup coil 54β shown by is also increased.

Then, the control device 60 determines whether the time T1 set in the timer has elapsed (S16). Here, when the time T1 elapses (Yes in S16), the power supply to the second induction heating coil 32β is stopped. As a result, the electromotive force of the second pickup coil 54β indicated by the curve β once drops. Further, from the time when the power supply to the second induction heating coil 32β is stopped, as shown in FIG. 7 (A), the interference due to the magnetic flux from the second induction heating coil 32β is stopped, so that the first pickup coil 54α is turned on. The power (curve α) is noise free. Therefore, the stop timing (portion A in FIG. 7A) described later can be accurately detected.

Thereafter, the control device 60 starts the detection processing of the stop timing of the first induction heating coil 32α (S).
20). Here, as shown in FIG. 4 (B), the first fusion horn 50α melts the door trim 20 so that the carpet 1
When it is inserted into the 0 side, a steep rise of the curve α indicating the electromotive force of the first pickup coil 54α (A portion in FIG. 7A) is detected (Yes in S22). This restarts the energization of the second induction heating coil 32β (S
24), the timer (time T2) for stopping the energization of the first induction heating coil 32α is started (S26). Then, when time T2 has passed and the timer times out (Yes in S28), the energization of the first induction heating coil 32α is stopped (S30). As a result, as shown in FIG. 7 (A), the interference due to the magnetic flux from the first induction heating coil 32α is eliminated, so that the second pickup coil 54
The electromotive force of β (curve β) has no noise. For this reason,
As will be described later, the stop timing (A ′ in FIG. 7A)
Part) can be accurately detected. After that, the second induction heating coil 32β is moved by the second pickup coil 54β.
Detection of the stop timing of is started (S32)

As described above, the time T shown in FIG.
Since the second fusing horn 50β is already heated during the period of 1, the second fusing horn 32β reaches a high temperature immediately when the power supply to the second induction heating coil 32β is restarted as described above. Therefore, as shown in FIG. 4C, the second fusing horn 50β is inserted into the carpet 10 side by melting the door trim 20 in a short time. By this insertion, the electromotive force (curve β) of the second pickup coil 54β rises sharply (A ′ part in FIG. 7A). This rising is detected (Yes in S34), and the timer (time T2) for stopping the energization of the second induction heating coil 32β is started (S36). Then, when the time T2 elapses and the timer times out (Yes in S40), the energization of the second induction heating coil 32β is stopped (S42), and all the processes are ended. In addition, the timings T1 and T2 of stopping the energization of the induction heating coils 32α and 32β by the timer.
Is preset according to the experimental result.

The control device 60 uses the A table 6 shown in FIG.
Following the completion of fusion bonding in 2A, B table 62B
Then, the fusion is performed by the processing described above with reference to FIG. 5, and finally, the fusion is performed on the C table 62C to complete the fusion of the door trim 20 and the carpet 10.

In the present embodiment, first, both the first induction heating coil 32α and the second induction heating coil 32β are simultaneously energized, the second fusion horn 50β is heated to some extent in advance, and then the first fusion heating horn 50β is temporarily heated. The second induction heating coil 32β is stopped from being energized, the interference of the magnetic flux from the adjacent induction heating coils 32α and 32β is prevented, and the timing of stopping the energization of the first induction heating coil 32α is detected. The energization of the heating coil 32β is restarted. Therefore, the second fusion horn 50β can be heated to a temperature at which the second fusion horn 50β can be fused immediately after restarting the energization, and the first and second fusion horns 5 can be quickly heated.
It becomes possible to complete the fusion by 0α and 50β,
The cycle time of the induction heating fusion machine can be shortened.

That is, as described above with reference to FIG. 9, it takes about 40 seconds to perform one fusion, and 80 seconds if the fusion is alternately divided into two. Here, as described above, the A table, the B table, and the C table have 3
When the fusion was performed by dividing into times, the fusion took about 240 seconds. On the other hand, in the present embodiment, as shown in FIG. 7A, since the first and second fusing horns 50α and 50β can be fused twice within 60 seconds, the A table and the B table are , C table can be divided and the fusion is about 1
It can be completed within 80 seconds, and the machine cycle can be shortened by 1 minute or more.

Now, the process of detecting the stop timing in steps 20 and 32 described above with reference to FIG. 5 will be described in detail with reference to the flowchart of FIG. 6 showing the subroutine of the process. In FIG. 7A, the solid line α is the waveform of the electromotive force uttered by the first pickup coil 54α in real time, and the broken line α ′ is the waveform delayed by DT. In addition, FIG.
It is explanatory drawing which expands and shows the cycle F part in (A).

In this embodiment, it is determined whether or not the electromotive force has sharply increased based on the magnitude of the difference between the real-time electromotive force value shown by the solid line α and the delayed electromotive force value shown by the broken line α '. There is. That is, when the electromotive force gradually rises as instructed at timing G in FIG. 7B, the real-time electromotive force value (α) and the delayed electromotive force value (α ′) The difference is small. On the other hand, when the electromotive force suddenly rises, the difference between the real-time electromotive force value and the delayed electromotive force value increases as instructed at the timing H.

First, the elapsed time is set to T and the voltage at time T is set to V (S52). Next, data processing variables are defined (S54). Here, the delay time DT
Is set to, for example, 0.2 seconds. Further, the resin crossing start detection voltage skew value Volt is set. This value is
This is for detecting a rapid increase in electromotive force at time A-D in (A). Furthermore, the peak generated voltage error DV
To set. This is a value for canceling the noise because the electromotive force value detected via the coil includes noise.

Subsequently, detection of a rapid rise in electromotive force shown in FIG. 7A is started (S60). First, an electromotive force value V (T-DT) obtained by delaying the current electromotive force value V (T).
Is the measured maximum electromotive force value Peak V
It is determined whether olt is exceeded (S60). Here, when the subtracted value exceeds the maximum electromotive force value (Yes in S60),
The subtracted value is set as the maximum electromotive force value (S62). That is, the largest value among the differences between the current electromotive force value V (T) and the electromotive force value V (T-DT) given the delay time is set as the maximum electromotive force value Peak Volt.

Subsequently, a value obtained by subtracting the electromotive force value V (T-DT), which is a delay time from the current electromotive force value V (T), and the peak generated voltage error DV for canceling the above-mentioned noise is obtained. , It is determined whether or not the maximum electromotive force value Peak Volt is exceeded (S64). Here, when the subtracted value exceeds the maximum electromotive force value (Yes in S64), the current time T is set as the time Peak Time at which the maximum electromotive force is generated (S66). That is, the maximum electromotive force generation time Peak Time is set so as not to be affected by an error due to noise.

Then, the measured maximum electromotive force value Peek
It is determined whether Volt is less than the resin crossing start detection voltage skew value Volt set in step 54 described above in order to detect a rapid increase in electromotive force at time A-D in FIG. 7A (S68). Here, the detected maximum electromotive force value Pe
ek Volt is the resin crossing start detection voltage threshold value Vol
When it is less than t, that is, before the electromotive force suddenly rises (Yes in S68), the process returns to step 60, and the detection of the maximum electromotive force value Peak Volt is continued. On the other hand, when the maximum electromotive force value Peak Volt is equal to or higher than the resin crossing start detection voltage skew value Volt, that is, when the electromotive force suddenly rises (No in S68), the stop timing of the first induction heating coil 32α described above. The process ends as detection.

Here, the first induction heating coil 32 is used.
Although the detection of the stop timing of α has been described, the step 3 in FIG. 5 is also performed for the second induction heating coil 32β.
The same is detected at 6.

In this embodiment, since it is determined whether or not the electromotive force suddenly rises based on the difference between the real-time electromotive force value and the delayed electromotive force value, the change in electromotive force can be accurately detected. It is possible to control the temperature of the fusion horn so as to exert the highest fusion force.

In the above-mentioned embodiment, 40 to 50.
Multiple horns spaced mm apart were heated in two batches to avoid interference from adjacent induction heating coils. Here, when the horns are arranged closer to each other (for example, the distance is 30 mm or less), when the interference is also received from the two adjacent induction heating coils, the horns are separated into the first, second and third horns.
It is also possible to divide into horns and heat in three times. Further, in the above-described embodiment, an example in which the resin is fused is given, but it goes without saying that the induction heating fusion machine of the present invention can be used for fusion of various members.

[0042]

As described above, according to the induction heating fusion machine and the method of operating the induction heating fusion machine of the present invention, first, both the first induction heating coil and the second induction heating coil are simultaneously operated. After energizing and heating the second fusion horn to some extent in advance, temporarily de-energizing the second induction heating coil, detecting the timing of de-energization of the first induction heating coil, and then the second induction heating. Re-energize the coil. Therefore, the second fusion horn can be heated to a temperature at which fusion can be performed immediately after restarting the energization, and fusion by the first and second fusion horns can be completed in a short time. Therefore, the cycle time of the induction heating fusion machine can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view of a door trim fused by an induction heating fusion machine according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of an induction heating fusion machine according to an embodiment.

FIG. 3 is a GG cross-sectional view of the A table shown in FIG.

FIG. 4 (A), FIG. 4 (B), and FIG. 4 (C) are cross-sectional views showing a fusion process using an induction heating fusion machine.

FIG. 5 is a flowchart showing an operating method of the induction heating fusion machine according to the embodiment of the present invention.

6 is a flowchart showing a subroutine of a detection process of a stop timing of the induction heating coil shown in FIG. .

FIG. 7 (A) is a timing chart showing an operation method of the induction heating fusion bonding machine according to the embodiment of the present invention.
7B is an enlarged view of the cycle F in FIG. 7A.

FIG. 8 is an explanatory diagram showing a configuration of a prior art induction heating fusion machine.

FIG. 9 is a timing chart showing an operating method of the induction heating fusion machine according to the prior art.

[Explanation of symbols]

10 carpet 16 PE backing 20 PP resin (door trim) 30 Lower mold 32α first induction heating coil 32β second induction heating coil 40 Upper mold 42 air cylinder 50α First fusion horn 50β Second fusion horn 52 Stopper 54α First pickup coil 54β Second pickup coil 60 Control device (energization control means)

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 65/00-65/82

Claims (4)

(57) [Claims] 1. A first and a second fusion-bonding horn arranged adjacent to each other and a first and a second fusion-bonding horn which are respectively induction-heated.
A method for operating an induction heating fusion machine including a second induction heating coil, comprising: inserting a work between the first and second fusion welding horns and the first and second induction heating coils; In an operating method of an induction heating fusion machine, which presses a second fusion horn against a work, and fuses the work by heating the first and second fusion horns with the first and second induction heating coils, After simultaneously energizing both the first induction heating coil and the second induction heating coil,
After stopping the energization of the induction heating coil side, the timing of stopping the energization of the first induction heating coil is detected based on the magnetic flux change on the first fusion horn side, and the energization of the first induction heating coil is stopped, The energization of the second induction heating coil is restarted after detecting the timing of stopping the energization of the first induction heating coil, and the timing of stopping the energization of the second induction heating coil is set after the energization of the first induction heating coil is stopped. A method for operating an induction heating fusion machine, comprising: detecting based on a change in magnetic flux on the second fusion horn side, and stopping energization of the second induction heating coil. 2. The method of operating an induction heating fusion machine according to claim 1, wherein a timing of stopping energization of the second induction heating coil is controlled by a timer. 3. The energization of the second induction heating coil is resumed after the energization stop timing of the first induction heating coil is detected, while the energization of the first induction heating coil is continued. The method for operating the induction heating fusion machine according to claim 1 or 2. 4. An induction heating fusion machine comprising first and second fusion horns arranged adjacent to each other, and first and second induction heating coils for respectively induction heating the first and second fusion horns. Then, a work is inserted between the first and second fusion horns and the first and second induction heating coils, and the first and second fusion horns are pressed against the work, and the first and second fusion horns are pressed. In an induction heating fusing machine for fusing a work by heating the fusing horn with the first and second induction heating coils, (a) is disposed on the first fusing horn side,
A first detection device for detecting a change in magnetic flux from the first induction heating coil; and (b) a second detection device arranged on the second fusion horn side for detecting a change in magnetic flux from the second induction heating coil. And (c) an energization control means for controlling energization of the first induction heating coil and the second induction heating coil, wherein both the first induction heating coil and the second induction heating coil are energized at the same time, After stopping the energization of the second induction heating coil side, the timing of stopping the energization of the first induction heating coil is detected by the first detection device based on the magnetic flux change, and the energization of the first induction heating coil is stopped. Energization of the second induction heating coil is restarted after detecting the timing of stopping energization of the first induction heating coil, and timing of stopping energization of the second induction heating coil after stopping energization of the first induction heating coil. To the second detector It detected based on the change in the magnetic flux, and stops the energization of the second induction heating coil, the induction heating fuser, characterized in that it comprises a power supply control device.