JPH0664767U - Tube inner surface adhesive coating device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an adhesive application device for applying an adhesive evenly and evenly to the inner surface of a tube, particularly a thin tube. A tube inner surface adhesive applicator having at least a tube upper end fixing jig and a tube lower end fixing jig arranged to hold and fix a tube in a vertical direction, the tube lower end fixing jig being provided. The tool has an adhesive supply passage therein and has a tapered side wall. [Effect] It has become possible to efficiently and thinly apply the adhesive to the inner surface of a thin tube in a short time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device capable of uniformly and evenly applying an adhesive to the inner surface of a tube, and more particularly to a device capable of efficiently applying the inner surface of a thin tube.

[0002]

[Prior art]

 In order to adhere the tube to the cylindrical base material, there is a demand to apply the adhesive evenly and efficiently on the inner surface of the tube. Conventionally, a method of using a brush is known as a method of applying an adhesive to the inner surface of the tube. This method is characterized in that the adhesive is applied with a brush, but uneven application of the adhesive is likely to occur and it is extremely difficult to apply the adhesive uniformly. Furthermore, there are still problems in workability. In other words, the brush taken out from the adhesive tank is liable to drip the adhesive, and since it is difficult to hold the tube, it is difficult to apply the adhesive using the brush, and it also takes time. An air spray method is known as a method different from the brush method. Although this method can be said to have significantly improved workability as compared with the brush method, the uneven application of the adhesive and the point of uniform application of the adhesive still remain, and the tube It is hard to hold down so that it will not be blown by the air, and there is still room for improvement.

The above problems become remarkable when an adhesive is applied to the inner surface of a thin tube by using these methods, and a new technique different from the conventional method is proposed. I'm waiting.

[0004]

[Problems to be solved by the device]

 Therefore, the present invention has been made in order to achieve the above-mentioned object, and an object thereof is to provide a device capable of applying an adhesive thinly and evenly and efficiently to an inner surface of a tube, particularly an inner surface of a thin tube. It is what

[0005]

[Means for Solving the Problems]

 The present invention has been made to achieve the above-mentioned object. When the tube is arranged vertically, the adhesive is poured into the tube from the bottom to a predetermined position, and then the adhesive is removed. It is based on the knowledge that it has become possible to apply the adhesive evenly and efficiently on the inner surface.

[0006]

[Specific explanation of the device]

 Hereinafter, the present invention will be described in detail. Referring to FIG. 1 showing a preferred coating device of the present invention, a tube lower end fixing jig (2) having a tapered side wall (22) is arranged in an adhesive spill prevention tray (5). . An adhesive passageway (21) is provided inside the jig (2), and the adhesive agent in an adhesive agent tank (not shown) is poured into the tube through the passageway or the tube. The adhesive inside may return to the bonding tank. One end of the tube is closely attached to the jig (2), and the other end of the tube is supported and fixed to a tube upper end fixing jig (3) provided with a hook (32). There is. If necessary, use a stand that has a jig that supports the tube top end fixing jig, or an arm that is equipped with protective equipment that protects the vertically held tube when it falls. It may be arranged. Further, the spill prevention dish (5) is provided with a hole (51) for collecting an excessive adhesive agent generated during an adhesive coating operation or a spilled adhesive agent. The hole is connected to an adhesive tank (not shown) via a recovery pipe (not shown).

In the present invention, the tube supported and fixed to the tube upper end fixing jig (3) is easily brought into close contact with the tube lower end fixing jig, and the tube is brought into close contact with the jig. After that, an important feature is that the tube can maintain the vertical state without requiring any support due to the self-supporting property of the tube itself.

The tube lower end fixing jig has at least an adhesive passage and a tapered side wall inside. The preferred shape of the jig is frusto-conical, but its cross section is elliptical, and furthermore, the upper surface is concave as it approaches the center, or a cylinder of the same diameter is located above the frusto-conical shape. The things that take the arranged shape can be mentioned. The passage of the adhesive may be set to a thickness such that the adhesive applied to the inner surface of the tube can freely flow, and it varies depending on the material and viscosity of the adhesive. The diameter of this jig is not particularly limited, but it is preferable to select a jig whose diameter in the middle of the jig is almost the same as the diameter of the tube or which is slightly larger. This jig is made of a material that is not deteriorated by an adhesive, but is usually manufactured from aluminum or a steel material that is resistant to rust, for example, a plated steel material.

The tube upper end fixing jig may be any one as long as it can support and fix the end of the tube. For example, a jig having a shape as shown in FIG. 2 can be used. Is preferred. This jig is manufactured using a spring plate. Further, it is preferable that a support tool is provided at substantially the center of the jig. This support has a role of protecting the tube when the tube which is freestanding falls when the inner surface of the tube is coated with the adhesive, and also a role of a locking tool in the subsequent drying process. Fulfill When a tube having no self-supporting property is used, the supporting tool plays a role of supporting the tube. The size of this jig is not particularly limited as long as it can support and fix the tube to be applied. The weight of the jig varies depending on the diameter, thickness, length, etc. of the tube, but a weight of about 1 to 30 g is usually used.

A method of applying the inner surface of the tube using the applying device will be specifically described. The end of the tube is fixed by pressing and shrinking the end of the tube upper end fixing jig, putting it inside the end of the tube, and releasing the jig. When the tube is held vertically and the other end of the tube is brought into contact with the upper end of the tube lower end fixing jig which has an adhesive supply passage inside and also has a tapered side wall, the tube is fixed. The end of the tube is easily attached to the jig for fixing the lower end of the tube. Next, the adhesive in the adhesive tank is poured into the tube from the passage inside the fixing jig at the lower end of the tube by compressed air. When the adhesive reaches a predetermined height, the operation of the motor is stopped, the adhesive in the tube is flushed from the passage in the jig, and returns to the adhesive tank again. When the tube was removed from the jig for fixing the lower end of the tube, a tube having a thin inner surface and uniformly coated with an adhesive could be obtained. Note that when the tube is removed from the jig, the adhesive spills to some extent, but the adhesive is recovered from the hole provided in the spill prevention dish into the bonding tank through the recovery pipe.

The thus-obtained tube having the inner surface coated with the adhesive is dried while the tube upper end fixing jig is attached. When this jig is provided with a hook, the hook can be hung on an arbitrary place and dried as it is, which is very useful with little trouble.

According to the present invention, the adhesive can be uniformly applied to the inner surface of the thin tubular material. In other words, even if the thickness of the tube is 1 mm or less, and even 0.1 mm or less, the adhesive coating device of the present invention enables thin and even coating of the inner surface of the tube.

The material constituting this tube, and the diameter and length of the tube are not limited at all, but it is preferable to use a tube having a self-supporting property. The adhesive used may be any adhesive as long as it has fluidity and is so-called "wet" with the tube. In the present invention, it is also possible to place an object having a specific gravity larger than that of the adhesive in the tube, reduce the volume in the tube, and reduce the amount of adhesive poured, thus avoiding tube buckling. Can be made. The object is preferably a pipe having a smaller cross-sectional area than the upper surface of the jig for fixing the lower end of the tube, or a columnar object. It is more effective to form a small-diameter hole for passing an adhesive in these materials, if necessary.

To explain the present invention in more detail, a thin PFA resin tube (φ: 38 mm, l: 370 mm, t: 0.07 mm) is fixed to the two jigs, and a predetermined amount of adhesive is applied from below. Pour. The tube was not buckled and no abnormality was found. When the poured adhesive was taken out, it was possible to obtain a tube in which the adhesive was evenly applied on the inner surface of the tube. Further, a jig as shown in FIGS. 3A and 3B (FIG. 3B is a sectional view taken along line XX ′ in FIG. 3A), that is, a tube lower end fixing Four thin cylinders (7) with small diameter holes (71) are fixed on the surface of the jig. Using a jig, use a thick tube (φ: 45 mm) or a long tube (l: When the adhesive was poured inside (450 mm), the tubes did not buckle and nothing abnormal was seen. When the poured adhesive was taken out, it was possible to obtain a tube in which the adhesive was applied uniformly on the inner surface.

[0015]

【effect】

 According to the present invention, there is provided a coating device having good workability, for example, the tube supported and fixed to the tube upper end fixing jig (3) is easily brought into close contact with the tube lower end fixing jig. Further, by using the coating device, it becomes possible to coat the adhesive on the inner surface of an extremely thin tube thinly, efficiently, and evenly. Further, the adhesive application time is short, which is economically advantageous. Furthermore, since the buckling of the tube can be prevented by using a small amount of the poured adhesive, it can be used even when the diameter of the tube is large or the length of the tube is long.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a tube inner surface adhesive coating device of the present invention.

FIG. 2 is a cross-sectional view of a tube upper end fixing jig of the present invention.

FIG. 3 is a partial cross-sectional view of the tube inner surface adhesive coating device of the present invention.

[Explanation of symbols]

 1 tube 2 tube lower end fixing jig 3 tube upper end fixing jig 4 stand 5 spill prevention dish 7 columnar object 21 adhesive passage 22 taper portion 31 end 32 hook 51 adhesive recovery hole 71 small hole

Claims (2)

[Scope of utility model registration request] 1. A tube inner surface adhesive coating device having at least a tube upper end fixing jig and a tube lower end fixing jig arranged so that the tube is held and fixed in a vertical direction, and the tube lower end portion is provided. A tube inner surface adhesive coating device, wherein the fixing jig has an adhesive supply passage therein and has a tapered side wall. 2. The tube inner surface adhesive coating device according to claim 1, wherein the tube upper end fixing jig is provided with a support tool.