JPS6042093B2 - Label pasting device for resin tube containers - Google Patents

Description

Detailed Description of the Invention This invention relates to a resin tube for wrapping and pasting a label on the surface of a tube container made of a single layer of thermoplastic resin in an extrusion type tube container for liquid or linear filling. The present invention relates to a labeling device for containers.

Generally, tube containers made of metal such as aluminum are commonly used, but in recent years, tube containers made of thermoplastic resin such as polyethylene have come into use.

However, if the surface of a tube container made of thermoplastic resin is printed by silk screen, dry offset, etc., there are limits to the physical strength and design of the printed area, which is not appropriate.

In addition, conventional single-layer thermoplastic resin tubes have drawbacks such as poor protection of contents, and thus tube containers having a multilayer structure have been put into practical use.

However, in this case, there are disadvantages such as the complicated netting process and printing process.

The present invention is based on the development of a means for automatically and appropriately attaching a label with aluminum foil to the surface of a tube container made of thermoplastic resin and made of a single layer. An example of i will be described. In Fig. 1, 1 is a single-layer resin tube container (hereinafter simply referred to as a tube container) made of thermoplastic resin such as polyethylene, and a label 2 is attached to the surface by wrapping. .

Note that the wrapping length of the label 2 may be determined as appropriate in accordance with the cutting size of the label sheet, or the label 2 may be attached in a butt-like manner. On the other hand, tube container 1
As shown in the enlarged cross-section, the label 2 is made of a single layer with an appropriate thickness, and in one example, the label 2 is made of a multi-layered structure. and a transparent film layer 2d with label printing 2c applied thereto, and these layers are laminated together via an adhesive by a dry lamination method or the like.

In the above, the tube container 1 has a protruding opening 1'' formed at the same time at the tip, and an opening at the rear end with the cylinder of the container body. As shown in the figure, the tube container 1 is in a relationship such that it can be fitted into the mandrel 4 of the rotary disk 3 from the rear end opening from the tip of the mandrel.

As shown in FIGS. 2 and 3, a suitable number of mandrels 4 are protruded from the periphery of the side surface of the rotating disk 3 at intervals in the lateral direction, and the rotating disk 3 is controlled by a rotating mechanism to control the number of mandrels. It is possible to operate intermittently at equal intervals of , and in correspondence with the tube container supply section 5, the tube container 1 for labeling can be supplied one by one to the mandrel that has arrived at the corresponding position, The other tube container discharging section 6 extracts and removes the tube container 1 after label pasting, which is performed in one rotation of the rotary disk 3, from the mandrel 4 at the pasting end position! It has a mechanism to

For the tube container 1 fitted on the mandrel 4, a heating device 7 is further disposed at a predetermined position before supplying the label 2 and for preheating the entire surface of the tube container 1. In this heating device 7:, the tube container 1 that is intermittently sent can be preheated by radiation of gas flame over the surface on which the label is attached.

In the above position, the tube container 1 which has reached the position facing the heating device 7 can be rotated by the drive mechanism at the corresponding position, even though the rotary disk 3 is stopped.
The heat from the heating device 7 can be radiated to the entire circumferential surface of the tube container 1 as it rotates.

The radiation heats the surface of the tube container to a temperature that can melt the low-melting polyethylene layer 2a provided under the label 2 in pressure contact with the surface of the tube container 1 in the next label pasting process. After heating, the tube container 1 after heating reaches the labeling section 8 at the next stage with the rotating disk 3 being rotated intermittently in equal parts.

In addition, in the label sticking section 8, a heating auxiliary roller 9 is provided at a fixed position on the frame 10 and is opposed to the mandrel 4 for heating and smoothing the wrapped label, which presses against the surface of the tube container while rotating. Reference numeral 11 denotes a heating section of this, which consists of a reflective heater mechanism. On the other hand, in the label sticking section 8, when the mandrel 4 reaches its predetermined position, the heating press roller 12 for heating and rolling up the corresponding label 7 moves upward from the 12'' position and presses against the mandrel 4. .

Since the heating press roller 12 serves as the main heating section, it is constantly heated to an appropriate temperature by a heating section 13 using a heater at both the upper and lower transition positions, and fuses the low-melting polyethylene layer 2a of the label 2 to the surface of the tube container. I) The surface of this roller is made of a heat-resistant and elastic structure (the same applies to the heating auxiliary roller 9), so that the label 2 can be transported by the supply table 14. When the label is sent to the label sticking section 8, the tip of the label is held between the tube container 1 of the mandrel and the heated pressing roller 12, and the label 2 is fused to the surface of the tube container, tightly wound and pasted.

In the above-mentioned pasting, the tube container 1 is preheated by the heating device 7 in the previous stage, and then further heated by the heating auxiliary roller 9, and the heating of the tube container 1 and the label 2 at the time of the above-mentioned label pasting is assisted by heating. The roller 9 and the heated pressure roller 12 for adhesion can be applied simultaneously from the other side, and the roller 9 with both contact pressure can smooth out wrinkles during adhesion.
, 12 at the same time. In addition, the label pasting part 8
For example, as shown in FIG. 4, if an arcuate surface 14'' is formed at the tip of the supply table 14 so as to be compatible with the circumferential surface of the tube container 1, this arcuate surface 14'' can also prevent wrinkles on the label 2. Can assist with stretching.

Therefore, the supply table 14 in this case is provided with elasticity toward the mantle. In the label sticking section 8, the mandrel 4 holding the tube container 1 rotates several times in the same position to stick the label 2 for a set time via an electrical timing mechanism such as a timer or a mechanical timing mechanism such as a cam. After the pasting is completed, the turntable 3 rotates intermittently and the next tube container 1 is placed in the label pasting section 8 in the same manner as above.
At this point, label 2 is pasted.

On the other hand, the labeled tube container 1a after labeling is brought into contact with the heating auxiliary roller 9a in the next stage to assist in adhesion of the label and to smooth out wrinkles, continuing the labeling process. The heating auxiliary roller 9b plays the same role in the next step, and the labeled tube container 1a after passing through the heating auxiliary roller 9b reaches the tube container discharge section 6 through a slight cooling section. Since the label pasting device of the present invention is as described above, even if the tube container 1 is made of a single layer of thermoplastic resin, the label 2 having a film structure can be efficiently and automatically pasted without using adhesive. Since the tube container only needs to be made in a single layer, injection molding thereof is extremely simple, and this can greatly contribute to reducing the cost of tube containers and increasing the aesthetic appeal of adhesive labels.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view of a labeled tube container partially shown in an enlarged cross section, and Fig. 2 is a side explanation of the labeling process. Figures 3 and 3 are perspective views of essential parts of label pasting, and Figure 4 is an explanatory view of another example of label supply. 1...Tube container, "...mouth, 1a.
...Tube container with label, 2... Label,
2a...Low melting polyethylene layer, 2b...
...Aluminum foil layer, 2c...Label printing, 2d.
...Coating layer, 3 ... Rotating disk, 4
... Mandrel, 5 ... Tube container supply section, 6 ... Tube container discharge section, 7 ...
...Heating device, 8...Label pasting section, 9,9
a, 9b... Heating auxiliary roller, 10...
... Frame, 11, 13... Heating part, 12,
12'...Heating pressure roller, 14...
・Supply table, 14″j... arc surface.

Claims (1)

[Claims] 1 An apparatus for pasting a multi-layer label having a low-melting resin layer on the bottom layer onto a tube container molded from a thermoplastic resin, which receives the tube container from a supply section and discharges it through a pasting section. Mandrels are protruded from the side of the rotary plate at regular intervals for sequentially and intermittently transferring the mandrels to the parts, and a drive mechanism for rotating the mandrels and a heating device for preheating are installed at predetermined positions in front of the pasting part. A heated pressing roller is provided as the next-stage pasting part, which moves upward from the home position and presses against the tube container fitted to the mandrel when the mandrel reaches the designated position, A heater is provided opposite to the press roller for heating both the upper and lower transition positions, and a label supply table is provided opposite the heated press roller and the mandrel, and the supplied labels are fitted onto the mandrel. It is configured so that it can be tightly wound while being fused to the surface of the tube container by being held between the attached tube container and the heated press roller.
Furthermore, a heating auxiliary roller that rotates and presses against the surface of the tube container fitted to the mandrel, which also serves as a heating auxiliary roller and smooths the wrapped label, is installed in a fixed position on the frame together with a heater mechanism, and the next stage is labeled. A label sticking device for a resin tube container, characterized in that an auxiliary heating roller is provided opposite to the frame together with a heater for applying pressure to the tube container and auxiliary heating to smooth out wrinkles.