JPH0338085Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a cylindrical article with one end closed, such as an extrusion tube used for containing and dispensing a viscous material little by little. It relates to a winding device.

BACKGROUND ART Conventionally, it has been known to adhere paper such as a label to the outer periphery of the body of an extruded tube such as an aluminum tube. This paper bonding is usually done by applying adhesive to the outside of the tube or to the back of the paper just before wrapping the paper around the tube. As an alternative to this method, a method is also known in which paper is coated with an adhesive on the back side and a release paper is attached, the release paper is peeled off near the tube, and the paper is adhered to the tube with the adhesive.

Problems to be solved by the invention However, the conventional method described above involves the process of handling adhesive in a sticky state or the process of handling paper with an adhesive backing, making it difficult to automate and requiring complicated equipment. There were problems such as.

Measures to Solve the Problems The inventor of the present invention has made extensive studies to solve these problems, and has found that by using heat-sensitive adhesive paper, which is not sticky at room temperature, to attach the paper to the tube, it becomes easier to handle the paper. Furthermore, it has been found that the heat-sensitive adhesive paper can be reliably bonded by heating the body of the tube and then wrapping the heat-sensitive adhesive paper around the body.

The present invention, which was made based on such knowledge, includes a hollow mandrel 1 whose one end is rotatably held;
A heater 6 is inserted into the hollow part 1A of the mandrel from the one end side and provided stationary, and a compressed air supply means (air nozzle 1) which supplies compressed air to the hollow part 1A of the mandrel from the one end side.
1, ventilation hole 7A, etc.) and a pressure roll 13 that can be pressed and released in parallel with the mandrel.

Function In the winding device with the above configuration, the mandrel 1
is heated with a heater 6, a tube 5 is inserted and held around the outer periphery of the mandrel 1, and the body of the tube 5 is heated with the mandrel 1. Next, heat-sensitive adhesive paper 16
is set at the winding start position and pressed onto the tube 5 while rotating the pressure roll 13, the tube 5 rotates together with the mandrel 1, and the heat-sensitive adhesive paper 16 is wrapped around its outer circumferential surface and heated and pressed. Adheres well. After that, the pressure roll 13
The tube 5 is discharged from the mandrel 1 by separating it from the tube 5 and blowing compressed air into the hollow part 1A of the mandrel 1.

Embodiments Hereinafter, preferred embodiments of the present invention shown in the drawings will be described in detail.

In FIG. 1, reference numeral 1 is a hollow mandrel, and one end, that is, the right end, of the mandrel 1 is rotatably held on a base 4 via a bearing 2 and a bearing case 3, and a tube 5 is inserted from the tip. It can be inserted and held.
Both ends of the hollow mandrel 1 are released, and from one end (right end) of the held side, the hollow part 1
An electric heater 6 having a heat generating portion 6A at its tip is inserted into the chamber A. Heater 6 is attached to bracket 7
It is fixed to the base 4 via the mandrel 1, and thus remains stationary within the mandrel 1 regardless of the rotation of the mandrel. The heat generating part 6A of the heater 6 heats the mandrel 1, and in order to achieve good heat transfer, the gap between the outer periphery of the heater 6 and the inner periphery of the mandrel 1 should be as small as possible. Since the compressed air for discharging the tube 5 needs to pass through the gap, it is necessary to form a gap large enough to allow the compressed air to pass through. Note that instead of using the gap between the outer periphery of the heat generating part 6A of the heater 6 and the inner periphery of the mandrel 1 as a compressed air passage, a longitudinal groove or hole may be formed in the mandrel 1 and this groove or hole may be used as a compressed air passage. . In this case, the gap between the outer periphery of the heater heat generating part 6A and the inner periphery of the mandrel 1 can be reduced to achieve good heat transfer.

A taper 1B leading to the hollow portion 1A is formed at the right end of the mandrel 1, and a plurality of ventilation holes 7A are formed in the portion of the bracket 7 facing the taper 1B.
is formed. Furthermore, an air nozzle 11 is arranged behind the bracket 7, which is connected to an air pipe 10 leading to a compressed air supply source. These air nozzles 11, ventilation holes 7A, etc. constitute compressed air supply means for supplying compressed air to the hollow portion 1A of the mandrel 1. Note that in the illustrated embodiment, the air nozzle 11 is separated from the bracket 7;
This is to allow the base 4 to move together with the mandrel 1 from the position shown. if,
When the base 4 is always stationary at the illustrated position, the air nozzle 11 is preferably provided in contact with the back surface of the bracket 7. Further, even when the base 4 moves, the air nozzle 11 may be made movable between the illustrated position and the position where it contacts the back surface of the bracket, and the air nozzle 11 may be brought into contact with the back surface of the bracket 7 when compressed air is supplied.

A pressure roll 13 parallel to the mandrel 1 is provided near the mandrel 1 . The press roll 13 is constantly driven to rotate, and is movable between a position away from the mandrel 1 and a position where it is pressed against the mandrel 1, as shown in the figure. The surface of the pressure roll 13 is lined with silicone rubber or the like so as to have appropriate elasticity and heat resistance. Note that in the figure, reference numeral 15 is a lead wire to the heater 6.

Next, the process of pasting the heat-sensitive adhesive paper onto the tube 5 using the above-mentioned apparatus will be explained.

(1) Turn on heater 6 and heat mandrel 1 to 100
Heat to ~130°C.

(2) Insert the tube 5 into the mandrel 1 through the opening at its bottom and hold it there. The body of the tube 5 is immediately heated by the mandrel. Note that since the mouth of the tube 5 is normally closed, the cap 5A may or may not be present.

(3) As shown in FIG. 2, set the heat-sensitive adhesive paper 16 at the starting position, that is, at the position where the leading edge of the heat-sensitive adhesive paper 16 is between the mandrel 1 and the pressure roll 13.

(4) The rotating press roll 13 is attached to the mandrel 1
Rotate and crimp against.

(5) The rotation of the pressure roll 13 causes the tube 5 and the mandrel 1 to rotate, and the heat-sensitive adhesive paper 16 is wrapped around the tube 5 (see FIG. 3).
At this time, the heat-sensitive adhesive paper 16 is strongly pressed against the tube 5 heated by the mandrel by the pressure roll 13, so that it becomes sticky and strongly adheres to the tube 5.

(6) After the tube 5 has rotated two to several times and the heat-sensitive adhesive paper 16 has strongly adhered to the tube 5, the pressure roll 13 is separated from the mandrel 1.

(7) Compressed air is blown from the air nozzle 11 into the tube 5 through the hollow part 1A of the mandrel 1, and the tube 5 is discharged from the mandrel 1.

(8) With the above, one operation is completed, and the same operation is repeated to paste paper onto a large number of tubes.

Note that all of the above operations may be performed when the mandrel 1 is in the position shown in FIG. The operation of attaching the tube and the operation of discharging the tube from the mandrel 1 may be performed at different positions from the illustrated positions. In this way, production efficiency can be increased by utilizing a large number of mandrels.

In the illustrated embodiment, the heat-sensitive adhesive paper 16 is attached to a part of the body of the tube 5, but it is also possible to widen the width of the heat-sensitive adhesive paper 16 and attach the heat-sensitive adhesive paper to the entire body of the tube. be. The wrapping device of the present invention can also be used to wrap paper such as labels around the body of a conventionally known aluminum tube, but it can also be used for wrapping paper such as labels around the body of a conventionally known aluminum tube. In order to successfully combine the advantages of aluminum tubes and laminate tubes, it is constructed by pasting single or laminated sheets of paper, plastic film, etc. onto the body of an aluminum tube, which has a thinner body than conventional aluminum tubes. The device of the present invention is extremely suitable for manufacturing composite tubes. Furthermore, the apparatus of the present invention is not limited to the application of paper to the illustrated extrusion tube, but can be used to apply paper to the body of any cylindrical article that is closed at one end.

Effects of the Invention As described above, the winding device of the present invention has a heater 6 provided in the hollow part of the rotatable hollow mandrel 1 to heat the mandrel, and a pressure roll 13 that can be pressed onto and detached from the mandrel. Since a cylindrical article such as a tube is attached to the outer periphery of the mandrel and heated, the heat-sensitive adhesive paper 16 can be wrapped around the outer surface of the article and bonded. Moreover, since the heater 6 is placed inside the mandrel 1, no extra space is required.
Moreover, since it is provided stationary, a complicated mechanism such as a slip ring is not required for connecting the lead wires, and the structure can be simplified and manufactured at low cost. Further, since a means for supplying compressed air into the hollow portion of the mandrel is provided, the cylindrical article on the mandrel can be automatically discharged using the compressed air.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a preferred embodiment of the present invention;
3 are perspective views showing the winding operation of the heat-sensitive adhesive paper according to the above embodiment. 1...Mandrel, 1A...Hollow part, 2...Bearing, 4...Base, 5...Tube, 6...
... Heater, 7 ... Bracket, 7A ... Ventilation hole, 11 ... Air nozzle, 13 ... Press roll,
16...Thermosensitive adhesive paper.

Claims (1)

[Scope of utility model registration request] a hollow mandrel whose one end is rotatably held; a heater inserted into the hollow part of the mandrel from the one end side and provided stationary; and compressed air supplied to the hollow part of the mandrel from the one end side. 1. A winding device for heat-sensitive adhesive paper, comprising: a compressed air supply means for supplying compressed air; and a pressure roll that can be pressed and released in parallel with the mandrel.