JPS5848348B2 - Danmenshihoukeikiyoukakeshiyoushikannoseizohouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a reinforced decorative paper tube having a square cross section.

Conventionally, a reinforced paper tube has been proposed in which a paper tube is impregnated with an uncured thermosetting resin and cured by heating.

However, in order to manufacture such a reinforced paper tube, the paper tube is placed in a tank and sealed, the pressure inside the tank is reduced to dehydrate it, and then an uncured thermosetting resin liquid is supplied into the tank. The inside of the tank is filled with resin liquid to impregnate the paper tube with resin liquid, then the excess resin liquid in the tank is drained and the paper tube is taken out, and the paper tube impregnated with resin liquid is placed in a heating furnace. Since the method of heating and curing is used, there is a drawback that continuous production is not possible.

In addition, reinforced paper tubes are manufactured by directly impregnating and hardening uncured thermosetting resin liquid into paper tubes made by winding long paper tapes in a spiral shape. appeared in streaks and was inferior in decorativeness.

The decorative problem could be solved by covering the entire outer circumferential wall of the paper tube with wide decorative paper, but it is extremely difficult to cover the paper tube continuously with decorative paper, and it is still difficult to cover the paper tube with decorative paper in a continuous manner. The current situation is that it has not yet been manufactured.

In view of the drawbacks of the conventional art, the present inventor has conducted extensive research, and as a result, the present inventors have developed a paper tube by sequentially bending a wide paper tape using a group of adhesive rolls in which the angle between the wall of the paper tube and the roll surface is gradually reduced. The entire outer wall is pressed and pasted, and then an annular packing with an inner diameter slightly smaller than the outer diameter of the paper tube is continuously passed through a suction chamber and a resin tank attached to the entrance and exit of the passage. By impregnating it with a hardened thermosetting resin, the conventional drawbacks were overcome and the present invention was completed.

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

In the drawings, A is a reinforced decorative paper tube with a square cross section manufactured by the manufacturing method of the present invention, in which a long decorative paper tape 2 is wound and pasted on the entire outer peripheral wall of a long paper tube 1 with a square cross section. It is impregnated with an uncured thermosetting resin liquid and cured by heating.

The long paper tube 1 is manufactured by winding a paper tape 11 in a spiral shape using an adhesive using a commonly used method, and has a rectangular cross-sectional shape.

Note that the paper tape 11 may be wound only in the same direction, or may be wound alternately in opposite directions.

Further, as shown in FIG. 10, the paper tube 1 may have an inner surface reinforced with a core body 12 having a square cross section and made of composite resin, metal foil, or the like.

When using a thermoplastic resin for the core body 12, for example, the thermoplastic resin is extruded into a cylindrical shape with a square cross section from a mold attached to the tip of an extruder, cooled and solidified to form the core body 12, and then The paper tape 11.
11 and winding the paper tape 11 around the outer wall of the core body 12 alternately in opposite directions.

The long decorative paper tape 2 covers the bottom quotient 13 and both sides 14 and 15 of the long paper tube 1 with a square cross section in a single layer, and covers the top surface 16 in a double layer. The width is the same along the edges 17 and 18, and the surface is decorated with various patterns by printing, punching, etc., or by being colored in various colors. Adhesive is applied to the back ml.

The thermosetting resin that is impregnated into the long decorative paper tape 2 and the long paper tube 1 and cured by heating includes unsaturated polyester,
Uncured liquid resins such as acrylic resins and epoxy resins are used.

The pasting device 3 attaches the decorative paper tape 2 coated with adhesive along the bottom surface 13 of the long paper tube 1 having a rectangular cross section at the same speed as the moving speed of the long paper tube 1. This is for press-sticking the cheek center part 21 of the paper tape 2 to the bottom surface 13 of the paper tube 1, and in FIG. is continuously supplied, and the paper tube 1 is continuously fed onto the decorative paper tape 2. By pressing the upper surface 16 of the paper tube 1 with a roll 31, the approximately central portion 21 of the decorative paper tape 2 is pressed. Paper tube 1
It is pressed and adhered to the bottom surface 13 of.

The pasting device 4 is used to remove the decorative paper tape 2 pasted by the pasting device 3.
This is for sequentially bending the unattached ends 22 and 23 of the paper tube 1 and press-attaching them to both sides 14 and 15 of the paper tube 1. In FIG. a plurality of adhesive rolls 41 for press-applying the unattached ends 22 of the
42, 43, 44. 45 and the remaining side surface 1 of the paper tube 1
A plurality of adhesive rolls 4 1 ′, 4 2 ′, for pressing and adhering the remaining unattached end portion 23 of the decorative paper tape 2 to 5 .
4 3', 44', 45', and are provided facing each other, as well as adhesive rolls 41, 42,
43, 44', 45 and sticking rolls 4 1', 4 2
The angles formed between the respective roll surfaces of ', 4 3', 44', and 45' and the respective side surfaces of the paper tube 1 are gradually made smaller in the direction of movement of the paper tube 1, and the final sticking roll 4 5
．． 4 5' is configured so that the entire surface presses against both side walls of the paper tube 1.

Thus, both unattached ends 22.23 of the decorative paper tape 2 are attached to the adhesive rolls 41, 42, 43, 44.45 and the adhesive rolls 41', 42', 43', 44', 45'.
The paper tube 1 is sequentially bent and pressed onto both sides 14 and 15 of the paper tube 1.

The pasting device 5 is used to remove the decorative paper tape 2 pasted by the pasting device 4.
The edge 26 of the unattached end 24 is sequentially bent.
This is to align the paper tape along the edge 17 of the paper tube 1 and press it to the top surface 16 of the paper tube 1. In FIG. A plurality of adhesive rolls 51, 52, 53, 54 for press-applying
and support rolls 5 1', 5 for supporting the paper tube 1.
2', 5 3', and adhesive rolls 51, 5
2, 53 and support rolls 51', 52', 53 are provided facing each other, and the adhesion rolls 51, 52
, 53, 54, and the upper surface 16 of the paper tube 1 are gradually made smaller in the direction of movement of the paper tube 1.
It is designed to press the

Thus, the unattached end 24 of the decorative paper tape 2 is sequentially bent by the adhesive rolls 51, 52, 53, and 54, and the edge 26
is placed along the edge 17 of the paper tube 1 and is pressed and adhered to the upper surface of the paper tube 1.

The pasting device 6 is used to remove the decorative paper tape 2 pasted by the pasting device 5.
The remaining unattached end 25 is sequentially bent to align the edge 27 of the unattached end 25 along the ridge 18 of the paper tube 1, and the attached end 24'
It is for press-sticking to a surface, and in FIG. 1, it is provided almost symmetrically with the sticking device 5, and the sticking end 24'
A plurality of adhering rolls 61 , 62 , 63 , 64 for pressing and adhering the unattached end 25 to the surface, and support rolls 6 1 ′, 6 2 ′, 6 3 ′ for supporting the paper tube 1 ，
and a pedestal 65.

The angles formed between the roll surfaces of each of the pasting rolls 61, 62, 63, and 64 and the top surface 16 of the paper tube 1 are gradually made smaller in the direction of movement of the paper tube, and the last roll 64 has a completely white pasted surface. It is adapted to press the surface of the landing end 24'.

Thus, the unattached end 25 of the decorative paper tape 2 is sequentially bent by the adhesive rolls 61, 62, 63, and 64, and the edge 27 is made to follow the ridge 18 of the paper tube 1 and is pressed against the surface of the adhesive end 24'. The decorative paper tape 2 is wound and pasted on the entire outer peripheral wall of the paper tube 1.

γ is a suction chamber for removing moisture in the decorative paper-wrapped paper tube A'; in FIG. 8, a passage is formed in the center, and an inlet 71 and an outlet 72 of the passage are formed. In addition, an annular packing 73. whose inner diameter is slightly smaller than the outer diameter of the paper tube A'. 7 3' is the packing presser foot 7 4. 7
4'.

Also, a through hole 75 is formed in the passage wall, and the through hole 75
is connected to a suction device (not shown).

Thus, the moisture in the paper tube A' is removed by suction while passing through the suction chamber 7.

Reference numeral 8 denotes a resin tank for impregnating the decorative paper-wrapped paper tube A' from which water has been removed with an uncured thermally oxidizing resin liquid. Along with being
At the inlet 81 and outlet 82 of the passage are annular packings 83. whose inner diameter is slightly smaller than the outer diameter of the paper tube A'. 8 3
' is packing presser 8 4. 8 4'.

Further, a through hole 85 is formed in the passage wall, and the through hole 85
is connected to a thermosetting resin liquid supply device (not shown).

Thus, while passing through the resin tank 8, the paper tube A' is impregnated with an uncured thermosetting resin liquid.

Note that when using a decorative paper-wrapped paper tube A' whose inner surface is reinforced with a core 12 made of synthetic resin, metal foil, etc., the paper must be impregnated with an uncured thermosetting resin liquid under reduced pressure. Since impregnation cannot be carried out satisfactorily due to the air remaining in the pipe A', it is necessary to connect the outlet 72 of the suction chamber 7 and the inlet 81 of the resin tank 8.

9 is a mold for semi-curing the thermosetting resin in the paper tube X impregnated with resin liquid;
A passage having an inner diameter approximately equal to the outer diameter of gA/ is formed, and is heated to such an extent that the uncured thermosetting resin liquid can be semi-cured.

Thus, while passing through the mold 9, the uncured thermosetting resin liquid is heated and semi-cured, and the surface is made smooth.

10 is a heating device for completely curing the thermosetting resin in the resin liquid-impregnated paper tube X';
A gas combustion furnace, an induction heating device, etc. are used, and the thermosetting resin that has been semi-cured by the hollow mold 9 is completely cured.

Next, examples of the present invention will be described.

Example The apparatus shown in FIGS. 1 and 8 was used.

A long decorative paper tape with a width of 80% and a wood grain pattern printed on the surface and adhesive applied on the back side is placed on the bottom of a long paper tube with a square cross section of 16% on a side, which is moving at a speed of 1 m/min. were applied at the same speed, and the center part of the cheek of the decorative paper tape was adhered to the bottom surface of the paper tube using a pasting device consisting of a roll and a pedestal.

Next, two sets of five adhesive rolls are used, and the angles between the roll surface of each set and the side surface of the paper tube are 80 degrees, 60 degrees, 35 degrees, 10 degrees, and 0 degrees in the direction of travel. Both unattached ends of the decorative paper tape were sequentially bent and attached to both sides of the paper tube using an attaching device constructed as follows.

Next, it consists of four adhesive rolls, and the angles between the roll surface and the top surface of the paper tube are 70 degrees, 45 degrees, and 1 degree in the direction of travel.
The unattached ends of the decorative paper tape were sequentially bent and attached to the upper surface of the paper tube using a sticking device set at 5 degrees and 0 degrees.

Next, it consists of four pasting rolls installed symmetrically with the pasting device, and the angles formed between the surface of each roll and the top surface of the paper tube are 70 degrees, 45 degrees, 15 degrees, The remaining unattached end of the decorative paper tape was sequentially bent and attached to the surface of the attached end using a sticking device that was turned on.

Furthermore, it was introduced into a suction chamber in which an annular packing with a square hole of 15.9% on a side was attached to the population and outlet of the passage, and 1
Moisture in the paper tube was removed by reducing the pressure to 0 mmHg.

Next, the resin tank was introduced into a resin tank in which annular packings with square holes of 15.9% on a side were installed at the entrance and exit of the passage, and the uncured unsaturated polyester resin liquid was pumped into the tank at a pressure of 10 kg/i. A paper tube was impregnated with the resin liquid.

Next, the resin liquid was semi-cured in a mold with a square cross-sectional shape of 16.1% on a side, an inlet temperature of 80°C, and an outlet temperature of 100°C.

The polyester resin was then introduced into a heating device with an inlet temperature of 180°C and an outlet temperature of 200°C to completely cure the polyester resin.

As detailed above, the manufacturing method of the present invention involves sequentially bending the decorative paper tape using a plurality of rolls in which the angle between the wall surface of the paper tube and the roll direction is made smaller in order.
Since the decorative paper tape is pasted on the top surface and wrapped around the entire outer circumferential wall of the paper tube, there will be no gaps between the paper tube and the decorative paper tape, and there will be no wrinkles in the decorative paper tape. Can be pasted continuously.

In addition, the manufacturing method of the present invention removes moisture and impregnates thermosetting resin by passing through a suction chamber and a resin tank in which annular packings with an inner diameter slightly smaller than the outer diameter of the paper tube are attached to the inlet and outlet. This allows continuous production of reinforced decorative paper tubes.

[Brief explanation of the drawing]

Figure 1 is a ten-sided view showing an example of a device for winding decorative paper around a paper tube, Figure 2 is a cutting diagram along the line ■-■ in Figure 1, and Figure 3 is a plate from Figure 1. 4 is a sectional view taken along the line IV-IV in Fig. 1, Fig. 5 is a sectional view taken along the line IV-IV in Fig. 1, Fig. 6 is a sectional view taken along the line IV-IV in Fig. ■A sectional view taken along line 1■, Figure 7 is a sectional view taken along line 1■1■, and Figure 8 shows an apparatus for impregnating and curing a paper tube wrapped with decorative paper with thermosetting resin. FIG. 9 is a cross-sectional view showing one example, and FIG.
Figure 0 is a perspective view showing another example of a reinforced decorative paper tube with a square cross section. A...Reinforced decorative paper tube with square cross section, A'...
・・Paper tube wrapped in decorative paper, κ・・・・Resin liquid impregnated paper tube,
1...Long paper tube, 11...Paper tape,
12... Core body, 13... Bottom surface, 14.
15...Side surface, 16...Top surface, 17,
18... Edge, 2... Long decorative paper tape, 21... Center portion, 22.23... Unattached end, 24.25. ...Unattached end, 26.2
7... Edge, 3... Pasting device, 31...
...roll, 32...cradle, 33...
...Through hole, 4...Passing device, 41, 42, 4
3,44.45...Passing roll, 4 1',
4 2', 4 3', 4 4', 45'...
- Sticking roll, 5... Sticking device, 51, 52,
53.54...Passing roll, 51', 52',
53'...support roll, 55...cradle, 6...sticking device, 61, 62, 63.64.
...Adhesive roll, 6 1', 6 2', 6
3'...Support roll, 65 pedestal, 7...
・Suction chamber, 71... Entrance, 72... Outlet, 73, 73'... Annular hacking, 74,
74'...Packing foot, 75...
Through hole, 8...resin tank, 81...inlet,
82...Exit, 8 3. 8 3'...
...Annular packing, 8 4. 8 4'...
・Packing foot, 85...Through hole, 9...
...Certain type, 10... Heating device.

Claims (1)

[Claims] 1. A wide long decorative paper tape coated with adhesive is moved along the bottom of a long paper tube with a rectangular cross section at the same speed as the moving speed of the long paper tube, so as to press the paper tube and the decorative paper tape. Approximately the center of the decorative paper tape is pressed and adhered to the bottom surface of the paper tube using a pasting device, and then a pasting tape consisting of multiple pairs of pasting rolls in which the angle between the side surface of the paper tube and the roll surface is made smaller in sequence. Both unattached ends of the decorative paper tape are sequentially bent and pressed to adhere to both sides of the paper tube, and then multiple pairs of adhesion rolls are used in which the angle between the top surface of the paper tube and the roll surface is made smaller one after another. The unattached end of the decorative paper tape is successively bent to align the edge of the unattached end to the edge of the paper tube, and is pressed and attached to the top surface of the paper tube using a sticking device consisting of the above-mentioned pressing device. The remaining unattached end of the decorative paper tape is sequentially bent using a symmetrically installed sticking device, and the edge of the unattached end is aligned with the edge of the paper edge, and the paper is pressed and stuck to the surface of the sticking end. Decorative paper tape is wound and pasted on the entire outer peripheral wall of the tube, and annular packings with an inner diameter slightly smaller than the outer diameter of the paper tube wrapped with decorative paper are introduced into the suction chambers attached to the entrance and exit of the passage. Then, an annular packing with an inner diameter slightly smaller than the outer diameter of the decorative paper-wrapped paper tube is introduced into a resin tank attached to the entrance and exit of the passage to absorb uncured thermosetting resin. It is impregnated with a resin liquid, and then introduced into a heating mold in which a passage with an inner diameter approximately equal to the outer diameter of the paper tube impregnated with the resin liquid is formed to semi-cure the thermosetting resin liquid and smooth the surface. ,
A method for producing a reinforced decorative paper tube with a rectangular cross section, characterized in that the thermosetting resin is finally completely cured using a heating device.