JPS6135229A - Manufacturing device for composite tube - Google Patents

Abstract

PURPOSE:To enable a sheet material to stick easily to the outside of a trunk part of a metallic tube, by a method wherein the sheet material is wound around the trunk part of the metallic tube after heating of the trunk by making use of an article to the back of which a heat-sensitive adhesive has been applied beforehand as the sheet material to be stuck to a metallic tube. CONSTITUTION:A metallic tube 1 supported by a mandrel 12 at a B position is heated by the mandrel 12 by the time the metallic tube 1 arrives at an A position. On the one hand, when a sheet material 2 is pulled out by a feed roller 24 and the tip of the same arrives at a space between the mandrel 12 and a revolving roller 13, the feed roller 24 is stopped by actuating a photosensor 27, and the sheet material 2 is cut off into a necessary length for winding a piece of the metallic tube 1 by actuating a cutter 25. Then the revolving roller 13 revolving always is pressed against the mandrel 12 and the sheet material 2 is wound around the outside of the metallic tube 1 by revolving the metallic tube and mandrel 12. The sheet material is stuck on the outside of the trunk of the trunk of the metallic tube one after another by performing the rest similary and a composite tube is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an extruded tube manufacturing device used for inserting and dispensing viscous materials in small quantities, and in particular, the present invention relates to an extruded tube manufacturing device used for containing and dispensing a viscous material in small quantities. The present invention relates to a method for manufacturing composite tubes by bonding single or composite sheet materials such as films.

BACKGROUND OF THE INVENTION Conventionally, metallic aluminum tubes and plastic laminate tubes have been commonly used as extruded tubes. However, each of these has advantages and disadvantages.For example, metal tubes have good gas barrier properties, but printing is limited, and the body has no restoring force, making it difficult to extrude the appropriate amount of contents. .

In addition, laminated tubes have the advantage of being able to print beautifully and have a soft body, making it possible to extrude an appropriate amount of the contents, but they have problems with gas barrier properties, and the shoulder after extruding the contents cannot be restored. Because the force is too great, there are problems such as air being sucked in and the contents rotting or deteriorating. Therefore, the present applicant has developed a new composite tube that eliminates the drawbacks of each of the conventional extruded tubes and can effectively exhibit each of the advantages. As shown in Fig. 4, this composite tube is made by adhering paper 1 and a single or composite sheet material 2, such as synthetic paper or plastic, to the outer surface of the body of a relatively thin metal tube 1. .

In addition, the sheet material 2 may be provided not only in the trunk but also in the 5-roll closure part 3.

Problems to be Solved by the Invention However, although the composite tube has the advantages of a metal tube and a laminate tube, it is difficult to manufacture.

That is, the above-mentioned composite tube is first made by extrusion molding a cylindrical metal tube 1 with one end open as shown in FIG. Although it is manufactured by bonding the sorting material 2, there is a problem in that it is difficult to bond the sheet material to the outer periphery of the thin and easily deformable cylindrical body, and automation is difficult.

Means to solve problems The inventor of the present invention has made extensive studies to solve this problem.

Use a sheet material that has been applied to the metal tube with a heat-sensitive adhesive on the back side in advance, heat the body of the metal tube, and then wrap the sheet material around the body of the metal tube to easily attach the sheet material to the metal tube body. We found scales glued to the outside surface.

The present invention, which was made based on such knowledge, provides a rotatable mandrel that fits into and supports the body of a cylindrical metal tube with one end open, a means for heating the mandrel, and a rotatable mandrel that is supported by the mandrel. a rotating roller pressed against the mandrel so as to press at least a portion of the body of the metal tube where the notebook material is exposed and rotate it together with the mandrel; and a sheet material to be wrapped around the body of the metal tube. A sheet material supplying device for feeding the leading end of the composite tube between the mandrel and the rotating roller.

Function: In the apparatus for producing composite tubes having the above configuration, a metal tube is inserted onto a heated mandrel and is supported and heated.Next, a heat-sensitive adhesive is present on the back surface between the mandrel and the rotating roller. The leading edge of the sheet material is fed and a rotating roller presses the sheet material against the metal tube on the mandrel.

Pressed against the mandrel. As a result, the metal tube rotates together with the mandrel, and the sheet material is wrapped around the outer periphery of the body of the metal tube while being pressed. At this time,
Since the metal tube is heated with a mandrel, the heat-sensitive adhesive on the back side of the sheet material is activated and the sheet material is well adhered to the metal tube. The sheet material is thus adhered to the metal tube body without handling tacky adhesive.

The heat-sensitive adhesive of the sheet material is heated by heating the metal tube with a mandrel as described above. It is preferable to heat the surface of the one-turn roller for heating.

EXAMPLE A preferred embodiment of the present invention shown in the drawings will be described in detail below.

FIG. 1 is a side view schematically showing an example of a composite tube manufacturing apparatus for manufacturing an eliminated tube by bonding a sheet material 2 to the outer surface of the body of a cylindrical metal tube 1 with one end open as shown in FIG. It is. In the figure, the manufacturing apparatus is roughly divided into a sheet material pasting device 10 and a sheet material supplying device 20. The sheet material pasting device IO includes a plurality of metal mandrels 2 held on a disc 11 that rotates intermittently and a rotating roller 13 provided in parallel near the mandrel 12 at position A.
exists. As shown in FIG. 3, each mandrel 12 has a hollow structure and is rotatably held relative to the disk 11.
A rod-shaped electric heater 14 is provided inside the hollow space. The heater 14 constitutes a means for heating the mandrel 12, and unlike the mandrel 12, it is fixed to the disc 11 so as not to rotate.

This structure is preferable because it facilitates electrical wiring to the heater 14; however, the heater 14 may be provided to rotate together with the tunnel 12. The mandrel 12 is fitted into the body of the metal china l to support it.
It has an outer diameter approximately equal to the inner diameter of the body. mandrel 12
A compressed air supply source is connected to the rear end. This compressed air source supplies compressed air into the mandrel 12.

It acts to remove the metal tube 1 supported on the mandrel 12 from the tip of the mandrel.

The rotating roller 13 is held by a suppressing device (for example, an air cylinder) (not shown), and the mandrel 12 is held as shown in FIG.
a six-turn rotary motor which is movable between a standby position away from the mandrel 12 and an operating position in which it is pressed against the mandrel 12 as shown in FIGS. The roller I3 is for pressing and adhering the sheet material 2 to the body of the metal tube I supported by the mandrel 12, and has an effective length that is at least longer than the width of the sheet material 2, and is made of metal. The wrap of sheet material on the tube is arranged to press against the section. Also, one rotation roller 1
The surface of 3 is so that the sheet material 2 can be wrapped around the metal tube 1 on the mandrel 12 and bonded well.
A heating device 15 such as an infrared heater is disposed near the zero-turn roller I3, which is lined with a material 1 having appropriate elasticity and heat resistance, such as silicone rubber, and heats the surface of the one-turn roller 13.

Near the mandrel 12 at position B of the disc 11, there is a metal tube insertion device (not shown) that automatically inserts the metal tube 1 shown in FIG. There is a discharge conveyor (not shown) that receives and discharges the metal tube 1 sent out from the mandrel 12.Since these are not directly related to the present invention, a detailed explanation will be omitted.

The sheet material supply device 20 includes a sheet material take-up roll 21.degree. guide roller 22. Dancer roller 23. Feed roller 24
, cutter 25, vacuum box 26. The sheet material wound around the 0-winding roll 21 having the photo sensor 2, etc. is made of paper (9) synthetic paper, plastic film, etc. alone or combined (11), and is printed in a predetermined manner and is coated with a heat-resistant adhesive on the back side. ing. Furthermore, this sheet material has
A symbol that can be detected by the photosensor 27 is printed for each length required to be wrapped around one metal tube. The cutter 25 is pulled out from the first take-up roll 21 and cuts the sheet material 2 whose tip reaches between the mandrel 12 and the rotating roller 13 as shown in FIG. 1 to the length necessary to wrap it around exactly one metal tube. It is placed in the position where it will be. The vacuum box 26 is disposed between the cutter 25 and the mandrel 12, and has a number of suction ports facing the sheet material 2, so that the suction port suctions and holds the sheet material 2 when vacuum is supplied. act. The dancer rollers 23 absorb silicone generated during the intermittent feeding of the sheet material 2.

The composite tube manufacturing apparatus shown in FIG. 1 is further equipped with a soaking control device that automatically performs the following operations.

Next, the operation of the above device will be explained. In FIG.

The disk 11 rotates intermittently so that the mandrel 12 advances one pitch at a time, and while the disk 11 is stopped, a metal tube 1 is inserted into the mandrel 12 at position B. The metal tube 1 supported by the mandrel I2 at the B position is heated by the mandrel 12 until the mandrel 12 reaches the A position. On the other hand, the sheet material 2 wound around the N3 take-up roll 21 is pulled out at the feed port 24, and when the leading end reaches between the mandrel 12 and the rotating roller 13 as shown in FIG. The vacuum box 26 operates to stop the rotation of the feed roller 24 and stop the sheet material 2. Next, the vacuum box 26 operates to hold the sheet material 2 stationary, and the cutter 25 operates to cut the sheet material 2 into one piece. Then, the vacuum box 26 is released, and the vacuum box 26 is released.
A rotating roller 13 that is constantly rotating in the direction indicated by the arrow.
is pressed against the mandrel 12, the tip of the sheet material 2 is pressed against the metal tube l, and at the same time the metal tube and mandrel 12 are rotated as shown in FIG.
wrapped around the outer surface of the metal tube. This metal tube 1 is heated by a mandrel 12 and is heated by a rotating roller 13.
Since the surface is also heated, the thermal adhesive No. 13 on the surface of the sheet material 21A is immediately heated, exhibits adhesive properties, and is adhered to the body of the metal tube. Thereafter, the rotating roller 13 returns to its original position.

The mandrel 12 supporting the metal tube l to which the sheet material 2 is adhered is moved from position A to the next position by rotation of the disk 11, and at position C, the metal tube is removed from the mandrel and sent to the primary process. Thereafter, five sheet materials were adhered to the outer surface of the metal tube body one after another in the same manner.

A composite tube is manufactured.

In the above embodiment, the mandrel 12 is held on the disc 11 and the sheet material is pasted intermittently to the positions (from position 7); however, the mandrel is not limited to the disc, and other holding means may be used. For example, the mandrel may be held by an endless chain to feed the sheet material to a certain position, or the mandrel may be arranged so as not to move, and the metal tube may be supplied and discharged at a fixed position.

The sheet material supply device H20 of the above embodiment uses a long sheet material wound around a take-up roll 21, and the tip of the sheet material 2 reaches between the mandrel 12 and the rotating roller I3 in a state fS. Although the structure is for cutting the material, 3 the present invention is not limited to this structure and can be modified as appropriate. A sheet material cut to a predetermined length may be used, or a sheet material cut to a predetermined length may be used instead of a winding roll. When feeding, the sheet material may be fed between the rotating roller and the mandrel by pressing the one-turn roller 13 against the mandrel 12 and rotating the mandrel and the metal tube thereon.

Effects of the Invention As described above, the apparatus of the present invention heats the body of a cylindrical metal tube 1 while supporting it with a mandrel 12, and also heats the body of a cylindrical metal tube 1 while supporting it with a mandrel 12. Since it is wrapped around the outer surface of the body of a metal tube, the sheet material can be wrapped around the easily deformable metal tube without deforming the tube, and at the same time the heat-sensitive adhesive can be activated. Good adhesion can be achieved. Furthermore, this invention! With Jt, there is no need to apply sticky adhesive to the sheet material or metal tube when adhering the sheet material to the metal tube.
Therefore, since it is not necessary to use adhesives that are difficult to handle, the structure of the device is simplified, and the JJ position is not contaminated with adhesives during operation, making maintenance management of the device easy. Exists.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing one embodiment of the present invention. The head of the metal tube 1 supported on the mandrel 12 is shown removed. FIG. 2 is a front cross-sectional view of the mandrel 12 and rotating roller 13 showing a state in which the sheet material 2 is wound around the metal tube l supported on the mandrel 12. 3 is a side sectional view of the mandrel 12 and rotating roller 13 in the state shown in FIG. 2, and FIG. 4 is a sectional view of the composite tube. FIG. 5 is a sectional view of a metal tube forming the convex body of the composite tube of FIG. 4.

Claims (1)

[Claims] a rotatable mandrel that fits into and supports the body of a cylindrical metal tube with one end open; means for heating the mandrel; and winding of at least a sheet material around the body of the metal tube supported by the mandrel. a rotating roller pressed against the mandrel so as to press the part and rotate it therewith; and a sheet material supply for feeding the leading edge of the sheet material to be wrapped around the body of the metal tube between the mandrel and the rotating roller. A composite tube manufacturing device comprising: