JPS6347615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for manufacturing the body of a tube container.

(Technical background) Conventionally, when the body of a tube is made of a laminated sheet of metal foil and synthetic resin or a single layer sheet of synthetic resin, the sheet is wound around the mandrel and run along the mandrel, and during this time the sheet is The wound polymerized portion is heated to fix it in the synthetic resin layer portion, and then cut into predetermined lengths to obtain tube bodies.

However, the problem here is the joint between the rolled and overlapping parts of the sheets, and how this joint is formed has a significant effect on the strength of the joint and, ultimately, the strength of the body.

Conventionally, in order to increase the strength of the joint, both joining edges of the sheets are sloped to increase the contact surface, or the joint is pressed with a greater force.

However, no satisfactory solution has yet been found using either method.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems, and is provided with a reinforcing material supply device for improving the strength of the rolled and overlapped portion of sheets in a conventional tube container body manufacturing device. An object of the present invention is to provide an apparatus for manufacturing a body of a tube container with even greater strength.

(Summary of the Invention) To achieve this object, the present invention provides a mandrel around which a laminated sheet of synthetic resin and metal foil or a single layer sheet of synthetic resin, which is unwound from a take-up roll, is wound, and a mandrel is provided along the axial direction of the mandrel. , a heating device that heats the rolled polymerized portion of the sheet; a pressure roller that presses the heated rolled polymerized portion; an extruder that applies a band-shaped molten resin to the rolled polymerized portion; A pressure roller for pressurizing the molten resin is sequentially arranged, a feed roller for the sheet is provided on the outer peripheral surface of the mandrel, and the sheet is placed in a predetermined position at a position where the tube-shaped sheet is separated from the mandrel. To provide a manufacturing device for the body of a tube container, which is equipped with a cutting device for cutting each length.

(Example) An example of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view of the body of a tube container manufactured by the manufacturing apparatus of the present invention. In the figure, the body part 10 of the tube is formed by winding a laminated sheet of synthetic resin and metal foil, such as a synthetic resin layer laminated on an inner layer and an outer layer of metal foil, or a single layer sheet of synthetic resin. Other band-shaped synthetic resin 1
4 is attached to it. Here, polymerization part 1
Both ends of the sheet 2 are fused and are also fused to the belt-shaped synthetic resin 14.

FIG. 2 is a schematic front view of a manufacturing apparatus showing an example of the present invention. In the figure, the manufacturing apparatus includes a heating device 26, a guide member 28, a pressure roller 30, and a feed roller 38 connected to a drive source 40 along the axial direction of a shaft 20 whose one end is supported by a main body frame (not shown). , extruder 32, and pressure roller 34
are arranged one after another, guide rollers 42, 42, 42 are provided as appropriate on the lower circumferential surface of the mandrel 20, and a cutting device is provided at the other end of the mandrel 20. Further, a guide member 28 is provided in front of the heating device 26 in the sheet traveling direction, and a reversing roller 22 is further provided in front of the guide member 28.
is provided. Here, 16 is a sheet, 18
12 is a winding roll of the sheet 16, 12 is an overlapping portion of the sheet 16, 14 is a band-shaped molten resin extruded from an extruder 32, and 10 is a material of the tube container body cut by a cutting device 36.

Next, the operation of the above manufacturing apparatus will be explained.

The sheet 16 that is intermittently or continuously unwound from the take-up roll 18 is first turned by the reversing roller 22 with the inner surface of the sheet 16 being wound up facing upward, and then passed through the guide member 24 and polymerized by the heating device 26. Both edges of the sheet 16 to be processed are heated, and then wound around the mandrel 20 by a guide member 28 provided around the mandrel 20, so that both ends of the sheet 16, which were heated earlier, are wound around the mandrel 20. The polymerized portion 12 is formed by polymerization.

Next, the overlapping portion 12 of the sheet 16 wound around the mandrel 20 is strongly pressed by the pressure roller 30 to promote welding, and then the sheet 16 advances toward the extruder 32 .
The extruder 32 extrudes the molten resin 14 in the form of a band, and the molten resin 14 covers the overlapping portion 12 of the sheet 16.

The molten resin 14 is welded to the synthetic resin on the sheet 16 side, and after this welding is promoted by the pressure roller 34, it is cooled. This cooling is performed by the pressure roller 3.
4 may be used to cool the pressure roller 34, or a cooling roller (not shown) may be provided separately for cooling.

After this, the sheet 16, which has become a tube, is attached to the mandrel 2.
0, and is cut into predetermined lengths by a cutting device 36 to form the raw material 10 for the tube container body.

Here, the sheet 16 wound around the mandrel 20 is guided by a guide roller 42 and travels by a feed roller 38.

(Effects of the Invention) As described above, since the apparatus of the present invention is equipped with an extruder that attaches a band-shaped molten resin to the polymerized portion of the wound sheet, it is easy to attach a reinforcing material to the body of the tube container. Moreover, since this extruder can be installed above the sheet flow, it does not complicate conventional manufacturing equipment in any way.

In addition, since the belt-shaped synthetic resin that serves as the reinforcing material is supplied from an extruder, it adheres to the overlapping part of the sheet in a molten state, and as a result, it becomes easier to weld with the resin on the sheet side, which not only improves the strength of the overlapping part. It is also possible to improve the sealing properties and appearance of the polymerized region.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the body of a tube container manufactured by the manufacturing apparatus of the present invention, and FIG. 2 is a schematic front view of the manufacturing apparatus showing an example of the present invention. DESCRIPTION OF SYMBOLS 10... Body part, 12... Polymerization part, 14... Molten resin, 16... Sheet, 20... Mandrel, 26...
Heating device, 30... Pressure roller, 32... Extruder, 34... Pressure roller, 36... Cutting device, 3
8...Feed roller.

Claims (1)

[Claims] 1. A mandrel is provided around which a laminated sheet of synthetic resin and metal foil or a single layer sheet of synthetic resin is unwound from a take-up roll, and along the axial direction of the mandrel,
a heating device that heats the rolled and overlapped portion of the sheet;
a pressure roller that presses the heated winding overlapping part;
An extruder that applies a belt-shaped molten resin to the wound polymerization portion and a pressure roller that presses the applied molten resin are sequentially disposed, and a feeding roller for the sheet is provided on the outer peripheral surface of the mandrel, 1. An apparatus for manufacturing a body of a tube container, characterized in that a cutting device for cutting the sheet into predetermined lengths is provided at a position where the tube-shaped sheet is separated from the mandrel.