JPS6223652B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating processing apparatus for heating a workpiece.

Conventionally, a device for achieving this type of purpose consists of a movable body (hereinafter referred to as the moving body) of one clamping member and a base (hereinafter referred to as the base) of the other clamping member provided opposite to this. A heating element is installed, a workpiece to be heated (for example, a synthetic resin sheet, etc.) is inserted between the movable body and the base, the movable body is moved by external pressure, the workpiece is held, and the heat of the heating element is used to heat the workpiece. Heat processing (e.g. welding, fusing, etc.) was used.

With conventional equipment like this, a certain amount of force is used for a certain period of time.
The workpiece must be pressurized by the movable body and the base that face each other, and the flatness of the movable body and the base and the ability to follow the shape of the workpiece are required.
A cushioning material or the like is provided under the heating element attached to the movable body or the base, making it possible to follow the shape of the workpiece to a certain extent. However, depending on the workpiece material, there is a limit to this follow-up range, and the flatness of the moving object and base itself is often impaired due to long-term use, so sufficient effects cannot be obtained (for example, uneven welding, etc.) Product variations and defective products are likely to occur,
The reliability was not completely satisfactory. In particular, when the workpiece is long, it is difficult to obtain the effect uniformly, and when the workpiece has a shape that does not require flatness (for example, the thickness is uneven to some extent), this type of conventional It was impossible to perform heat processing using a device.

The present invention aims to eliminate such drawbacks. That is, the workpiece is held between the moving body and the base by the magnetic adsorption force without applying external pressure, and heat processing is performed using a heating element provided on the moving body and the base. In addition, if at least one of the moving body and the base is made of a flexible magnet or magnetic material (for example, a rubber magnet or a substance called rubber magnetic material), the ability to follow the shape of the workpiece will be fully demonstrated. be done.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

Figures 1a to 1c show a first embodiment of the present invention.
Figure a shows the state before the workpiece is clamped;
FIG. b is a side view showing a state in which a workpiece is held and heated. FIG. 1c is a sectional view of FIG. 1b taken along the line A-A'.

To explain each member in FIGS. 1a to 1c, 1a
is a moving body of magnetic material. A spring 2 has one end connected to the magnetic moving body 1a and the other end connected to the heating element 3. Reference numeral 3 denotes a heating element whose both ends are connected to the magnetic moving body 1a by springs 2. 4 is the base. A spring 5 has one end connected to the base 4 and the other end connected to a flexible magnet 6a. 6a
is a flexible magnet whose both ends are connected to the base 4 by springs 5. 7 is a workpiece material.

Next, the operation and effect will be explained in detail with reference to FIG. 1b.

A sheet-shaped workpiece material 7 made of synthetic resin or the like is placed between the magnetic moving body 1a and the base 4 which are provided facing each other.
(for example, a polyethylene sheet). Next, when the magnetic moving body 1a is moved in the direction of arrow A by a drive means (not shown), the workpiece 7 is held between the magnetic moving body 1a and the base 4. If there is a gap between the magnetic movable body 1a and the base 4 during such action, the gap will be caused by the workpiece 7.
However, in this embodiment, the magnetic movable body 1a and the flexible magnet 6a provided on the base 4 are attracted by the magnetic adsorption force, so the gap mentioned above disappears. In addition, due to the flexibility of the main body of the magnet 6a, it is clamped with a uniform pressing force that follows the shape of the workpiece 7.

The springs 2 are for absorbing the length that the heating element 3 has expanded and preventing unevenness from occurring on the heating element 3. Also, since the springs 2 are provided at both ends of the heating element 3, they can absorb the length that the heating element 3 has expanded from side to side. Since it can be dispersed, the amount of movement is reduced, and the influence on the clamped workpiece 7 is considered to be minimized.

When the heating processing of the workpiece 7 is completed in this way, the magnetic moving body 1a is moved in the direction of arrow B by a driving means (not shown) to release the workpiece 7 from being held between the base 4. At this time, the flexible magnet 6a provided on the base 4 holds the workpiece 7 while being magnetically attracted to the magnetic moving body 1a, so that the magnetic moving body 1a moves in the direction of arrow B. attempts to move in the same direction as the movement of . However, since both ends are connected to the base 4 via the spring 5, when the magnetic moving body 1a moves to a certain extent in the direction of arrow B, the flexible magnet 6a separates from both ends due to the action of the spring 5. Since the center portions are separated at the beginning and end, it is possible to take out the workpiece 7 from the apparatus without forcibly peeling it off.

When the flexible magnet 6a attached to the base 4 is separated from the completely magnetic moving body 1a, the base 4
A flexible magnet 6a, whose both ends are connected via a spring 5, is pulled left and right by the action of the spring 5, so that it is always in a flat state.

Next, FIGS. 2a to 2c show a second embodiment of the present invention, and FIG. 2a shows the state before the workpiece is clamped,
FIG. 2b is a side view showing the state in which the workpiece is held and heated.

FIG. 2c is a sectional view of FIG. 2b taken along the line B-B'.

To explain each member in Fig. 2 a to c, 1b
is a moving electromagnet. A spring 2 has one end connected to the base 4 and the other end connected to the heating element 3. Reference numeral 3 denotes a heating element whose both ends are connected to the base 4 by springs 2. 4 is the base. 6b is a flexible magnetic body attached to the base 4. 7 is a workpiece material. 8 is a coil wound around the moving body 1b of the electromagnet. 9 is a power source.

Next, the operation and effect will be explained in detail with reference to FIG. 2b.

A sheet-shaped workpiece material 7 made of synthetic resin or the like is placed between the electromagnetic movable body 1b and the base 4, which are provided facing each other.
(for example, a polyethylene sheet). Next, when the electromagnetic moving body 1b is moved in the direction of arrow A by a driving means (not shown), the workpiece 7 is held between the electromagnetic moving body 1b and the base 4. If there is a gap between the moving body 1b of the electromagnet and the base 4 during such action, that area will be damaged by the workpiece 7.
However, in this embodiment, a power source 9 is connected to the coil 8 wound around the electromagnetic moving body 1b.
When energized and magnetized, the flexible magnetic body 6b provided on the base 4 is attracted by the magnetic adsorption force, so the gap described above disappears, and in addition, the flexibility of the magnetic body 6b causes the workpiece to It is held with a uniform pressing force that follows the shape of 7.

The springs 2 are for absorbing the length that the heating element 3 has expanded and preventing unevenness from occurring on the heating element 3. Also, since the springs 2 are provided at both ends of the heating element 3, they can absorb the length that the heating element 3 has expanded from side to side. Since it can be dispersed, the amount of movement is reduced, and the influence on the clamped workpiece 7 is considered to be minimized.

When the heating processing of the workpiece 7 is completed in this way, the moving body 1b of the electromagnet is moved in the direction of arrow B by a drive means (not shown) to release the workpiece 7 from being held between the base 4. , stop supplying electricity from the power supply 9 to the coil 8 wound around the moving body 1b of the electromagnet,
If this operation is performed after the magnetization is eliminated, the workpiece 7 can be easily taken out from the apparatus without being hindered by magnetic force.

Next, FIGS. 3a to 3c show a third embodiment of the present invention, and FIG. 3a shows the state before the workpiece is clamped,
FIG. 3b is a side view showing the state in which the workpiece is held and heated.

FIG. 3c is a sectional view of FIG. 3b taken along the line C-C'.

To explain each member in FIGS. 3a to 3c, 1c
is a moving object. 6'a is a flexible magnet attached to the moving body 1c. 2 has one end as the base 4
This is a spring whose other end is connected to the heating element 3. Reference numeral 3 denotes a heating element whose both ends are connected to the base 4 by springs 2. 4 is the base. A spring 5 has one end connected to the base 4 and the other end connected to a flexible magnet 6a. 6a is a flexible magnet whose both ends are connected to the base 4 by springs 5.

7 is a workpiece material. Further, flexible magnets 6'a and 6a are attached to each movable body 1c and base 4, respectively, with polarity NS contrasted so that they attract each other.

Next, the operation and effect will be explained in detail with reference to FIG. 3b.

A sheet-shaped workpiece material 7 made of synthetic resin or the like (for example, a polyethylene sheet) is inserted between the movable body 1c and the base 4, which are provided facing each other. Next, when the movable body 1c is moved in the direction of arrow A by a drive means (not shown), the workpiece 7 is held between the movable body 1c and the base 4. If there is a gap between the movable body 1c and the base 4 during such an action, the workpiece 7 cannot be pressed at that part. The flexible magnet 6'a provided on the base 4 and the flexible magnet 6a provided on the base 4 are attracted by mutual magnetic adsorption force, so the above-mentioned gap disappears and the magnets 6'a and Due to the flexibility of the main body 6a, it is clamped with a uniform pressing force that follows the shape of the workpiece 7.

In the case of this embodiment, flexible magnets 6'a and 6a are installed on both the movable body 1c and the base 4, so that the clamping force and shape of the workpiece 7 can be followed without creating any gaps. The uniform pressing force and the like are better than those in the first and second embodiments described above.

The springs 2 are for absorbing the length that the heating element 3 has expanded and preventing unevenness from occurring on the heating element 3. Also, since the springs 2 are provided at both ends of the heating element 3, they can absorb the length that the heating element 3 has expanded from side to side. Since it can be dispersed, the amount of movement is reduced, and the influence on the clamped workpiece 7 is considered to be minimized.

When the heating processing of the workpiece 7 is completed in this way, the movable body 1c is moved in the direction of arrow B by a drive means (not shown), and the workpiece 7 is moved by a flexible magnet provided on the movable body 1c. The clamping between the flexible magnet 6'a and the flexible magnet 6a provided on the base 4 is released. At this time, the flexible magnets 6'a and 6a attached to the movable body 1c and the base 4 respectively hold the workpiece 7 while magnetically attracting each other, so that the movable body 1c is directed in the direction of arrow B. As the magnet 6a moves in the same direction, the flexible magnet 6a attached to the base 4 tries to move in the same direction. However, since both ends are connected to the base 4 via the spring 5, when the movable body 1c moves to a certain extent in the direction of arrow B, the flexible magnet 6a begins to separate from both ends due to the action of the spring 5, and finally moves to the center. Since the parts are separated, it is possible to take out the workpiece 7 from the apparatus without forcibly tearing it off.

When the flexible magnet 6a attached to the base 4 is completely separated from the movable body 1c, the flexible magnet 6a whose both ends are connected to the base 4 via the spring 5 is moved by the action of the spring 5. Since it is pulled left and right, it is always flat.

In the above explanation, the first to third embodiments of the present invention have been shown, but in general, permanent magnets are sensitive to heat and lose their original magnetic properties when heated to high temperatures, but in the present invention In the usage method, the performance was hardly impaired in actual usage conditions for the following reasons.

(1) The heating element is a commercially available Ni-Cr ribbon heater with a thickness of around 0.1 mm and a width of 5 mm or less, and has a small heat capacity.

(2) The time for heating the heating element by energizing it is only when the workpiece is clamped, and one process of actual heating takes less than a few seconds.

(3) A member that the heating element comes into contact with (in the example, a moving body, a flexible magnet, a magnetic body, etc.)
has a large volume and therefore a large heat capacity, so the temperature will not rise rapidly.
(Max. 40°C.) In addition, although three representative examples of the present invention were given to demonstrate their effects, the members shown in each example were used by recombining each other. However, its effects can be fully expected.

[Brief explanation of the drawing]

Figures 1a to 1c show a first embodiment of the present invention.
Figure a shows the state before the workpiece is clamped;
FIG. b is a side view showing a state in which a workpiece is held and heated. FIG. 1c is a sectional view of FIG. 1b taken along the line A-A'. Figure 2 a-c
2 shows a second embodiment of the present invention, and FIG. 2a shows the state before the workpiece is clamped, and FIG. 2b is a side view showing the state after the workpiece is clamped and heated. be. FIG. 2c is a sectional view of FIG. 2b taken along the line B-B'. Figures 3a to 3c show a third embodiment of the present invention, where Figure 3a shows the state before the workpiece is clamped, and Figure 3b shows the state after the workpiece is clamped and heated. FIG. FIG. 3c is a sectional view of FIG. 3b taken along the line C-C'. 1a, 1b, 1c... moving body, 2, 5... spring, 3... heating element, 4... base, 6'a, 6
a...Flexible magnet, 6b...Flexible magnetic material, 7... Workpiece material, 8... Coil, 9
……power supply.

Claims (1)

[Scope of Claims] 1. A heating processing device characterized in that a workpiece is magnetically clamped between opposing clamping members, and the workpiece is heat-processed using a heating element provided on at least one of the clamping members. . 2. The heating processing apparatus according to claim 1, wherein at least one of the holding members has flexibility.