JPH0356972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a packaging material twisting device for a bonbon packaging machine, which wraps a bonbon in a packaging material and makes the twisted portion plastic by heating.

[Conventional technology]

The method for heating the packaging material described above is known, for example, from German Patent Application Publication No. 2226710.

In the case of this known method, the twisting points of the packaging material,
That is, a very short turning range between the torsion grab and the bong is made plastic by a blast of hot air or by radiant heat energy. The twisting device implementing this method is generally equipped with a heating device, such as a blow nozzle or a heat radiator, for blowing the hot air or supplying the radiant heat energy.

[Problem to be solved by the invention] However, in the case of the above-mentioned known twisting device,
Since the area around the twisting point of the packaging material, including the active parts located there, is also heated by the scattering of hot air or radiant heat, it has not been possible to make only the twisting point of the packaging material plastic.

Furthermore, in this twisting device, it is necessary to heat the packaging material for a long time using a heating device in order to impart sufficient plasticity, and since the heating device is generally fixedly arranged, intermittent operation is not required. There was a problem that it could only be applied to

SUMMARY OF THE INVENTION An object of the present invention is to provide a twisting device that eliminates energy loss by heating only the twisted portion of a packaging material, and which can be used in a continuous operation process.

The object of the invention is to transmit thermal energy only to the torsion point without heating the surrounding area.

[Means for solving problems]

According to the present invention, this problem has been solved by comprising a wrapping ring equipped with a twisting grab and a heating device for plasticizing the synthetic resin film packaging material at a temperature below the melting point at a twisting point between the twisting grab and the bonbon. In a packaging material twisting device in a bonbon packaging machine, a take-out ring equipped with a take-out grab that grasps the twisted packaging material by the twisting grab at the twisting point of the packaging material is disposed behind the wrapping ring, and the take-out ring is arranged at the rear of the wrapping ring, and the take-out ring is arranged at the rear of the wrapping ring. This is achieved by heating the twisting point with the take-out glove in the path.

[Effect]

According to the present invention having the above configuration, direct heat transfer of the take-out glove makes it possible to heat only the twisted portion and make it plastic while preventing heat scattering. Furthermore, by arranging the take-out wheel with the take-out grab behind the wrapping wheel with the torsion grab, it is possible to carry out a continuous operation that is linked in the course of the operation.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The device for directly heating the synthetic resin film wrapping around the bonbons consists of a wrapping ring 1 equipped with a twisting grab 2 in a known manner. These torsion grabs 2 are made of a resin material and have a metal plate 3 on the gripping surface. The induction coil 4 is placed inside the machine frame, and the torsion grab 2
is arranged so that it passes through the induction coil 4 in the open state just before it closes (see FIG. 2). In this case, the metal plate 3 is heated by induction. Immediately after passing through the induction coil 4, a torsion grab 2 is controlled and grabs the free end of the wrapping material, whereby the thermal energy stored in the metal plate 3 is transferred to the wrapping material, making it plastic. . In this plastic state, the wrapping material is twisted in a known manner to prevent it from springing back again after release.

This embodiment further includes the following configuration.

That is, the take-out ring 5 is disposed subsequent to the wrapping ring 1,
This take-out ring 5 is equipped with a take-out grab 6 (see FIG. 1).

The removal head 7 of the removal grab 6 is made thin so that it passes through the area between the pong and the torsion grab 2 (see FIG. 5). The removal head 7 is made of ceramic and is provided with a thin metal plate, which is supplied with electricity via a conductor 8 and heated directly.

Note that the take-out head 7 can also be made of metal and heated by induction in the same manner as the above-mentioned torsion grab.

In this embodiment, the wrapping material is twisted in a known manner. After the twisting process, with the torsion grab 2 still closed, the removal grab 6 is controlled in a known manner for torsion grabs,
Grasp the wrapped bonbon on both sides in the area between it and the twisting grab 2 (see Figure 5). The torsion grab 2 is now opened. The thermal energy stored in the removal head 7 is now transmitted directly to the twisting points of the packaging material, thereby making it plastic. After the removal grab 6 is opened, the twisting point does not spring back again.

In the above embodiment, the packaging material is heated by both the twisting grab 2 and the take-out glove 7, but it is also possible to heat the packaging material only by the take-out grab 7.

〔Effect of the invention〕

Since the present invention has the above-mentioned configuration, only the twisted portion of the packaging material is heated by direct heat transfer of the take-out glove, but over a relatively long period of time along the rotation path of the take-out glove. This makes it possible to reliably prevent the packaging material from flying up with relatively little energy.

Moreover, by arranging the take-out wheel equipped with a take-out grab behind the wrapping wheel equipped with a torsion grab, there is an effect that continuous operation can be performed in conjunction with the progress of the operation.

[Brief explanation of drawings]

1 is a partial plan view of a torsion device having a take-out mechanism with a take-out grab; FIG. 2 is a side view of the torsion grab passing through the induction coil; and FIG. 3 is a front view of the torsion grab in FIG. FIG. 4 is a sectional view taken along the line A--A in FIG. 2, and FIG. 5 is a side view of the bonbon wrapped in the packaging material with the take-out grab closed and the twisting grab closed. 1... Wrapping ring, 2... Twisting grab, 3... Metal plate, 4... Induction coil, 5... Taking out ring, 6...
...Ejecting grab, 7...Ejecting head.

Claims (1)

[Scope of Claims] 1. A wrapping ring 1 equipped with a twisting grab 2, and a heating device for plasticizing a synthetic resin film packaging material at a temperature below the melting point at a twisting point between the twisting grab 2 and the bonbon. In a packaging material twisting device in a bonbon packaging machine, a take-out ring 5 equipped with a take-out grab 6 for grasping the twisted packaging material by the twisting grab 2 at the twisting point of the packaging material is disposed behind the wrapping ring 1; A packaging material twisting device for a bonbon packaging machine, characterized in that the twisting location is heated by the take-out grab 6 in the rotation path of the take-out grab 6. 2 The twisting grab 2 passes through an induction coil 4 placed just before the twisting grab 2 closes in its rotational path, whereby the twisting grab 2
The twisting device for packaging material in a bonbon packaging machine according to claim 1, characterized in that the device itself is heated.