JP2010167373A - Coating nozzle for two-part adhesive - Google Patents

Abstract

Adhesion with which two liquids can be prevented from coming into contact with the tip of a coating nozzle and cured, to prevent clogging of the nozzle tip, to improve work efficiency, and to overlap two liquids Provided is a coating nozzle for a two-component adhesive capable of stably obtaining sufficient adhesive strength by stably obtaining an agent layer.
An application nozzle 1A for discharging two liquids of a two-component adhesive so as to merge with each other at the tip of a cylindrical nozzle body 2 having a tapered tip 4; While two discharge ports 3a are provided across the surface, one or more portions 5a and 5b extending in the discharge direction beyond the tip surface of the tip are provided. A coating nozzle for a two-component adhesive capable of improving work efficiency by suppressing contact and curing of the two solutions at the tip of the coating nozzle.
[Selection] Figure 1

Description

  The present invention is a two-component adhesive coating that is detachably held at the tip of a container containing two types of adhesive components, and discharges the two types of adhesive components that are simultaneously extruded from the container so as to merge. It relates to the nozzle.

  Two-component adhesives composed of a main agent and a curing agent are stored in separate containers, and are used by mixing both solutions. As a coating device used for this two-component adhesive, it is a hand-held gun type, and by pulling a trigger, the two components of the two-component adhesive are pushed out from two cylinders and tubes separately accommodated, A type in which two liquids are combined and discharged from an application nozzle is known. For example, Patent Document 1 describes a type that discharges after mixing two liquids using a coating nozzle having a static mixer at the tip.

  However, when mixing with a mixer such as a static mixer, if the coating operation is interrupted halfway, the adhesive hardens inside the coating nozzle, and it takes time to remove the hardened adhesive. However, there is a problem that the working efficiency is lowered because the coating nozzle has to be replaced.

  On the other hand, without using a mixer such as a static mixer, the two liquids are merged in the extended region of the two discharge ports, and the region where the two liquids overlap is discharged from the coating nozzle in a laminated state. An application nozzle has been proposed (Patent Document 2). Similarly, without using a mixer such as a static mixer, a partition is provided in the discharge passage so as to form two discharge openings at the tip of the discharge passage, and the tip of the partition is ahead of the tip of the coating nozzle body. A discharge application nozzle that protrudes into the area has also been proposed (Patent Document 3).

JP 2005-246334 A JP-A-10-216594 JP-A-9-77099

  However, since the two liquids are easily in contact with the tip of the coating nozzle in the coating device of Patent Document 2, the adhesive is cured at the tip of the coating nozzle to clog or discharge the coating nozzle when the operation is stopped halfway. Therefore, in order to restart the work, it is necessary to clean the tip of the coating nozzle or replace the coating nozzle, which causes a problem that work efficiency is lowered.

  Further, in the coating apparatus of Patent Document 3, when the nozzle tip is grounded to the coating surface and coating is performed, the nozzle is formed by the fact that the two liquids easily come into contact with the nozzle tip as in the case of the coating apparatus of Patent Document 2. It may cause clogging. Moreover, when the partition is applied in a lateral direction so that the two liquids overlap, the adhesive component on the lower side of the partition protrudes on both sides of the partition, and a sufficiently overlapping adhesive layer cannot be obtained. For this reason, when the adhesive is bonded, poor adhesion due to poor contact between the two liquids occurs, reducing work efficiency, and the adhesive bonded with insufficient adhesive strength peels off over time or has a slight impact. There was a problem such as peeling off.

  Therefore, the present invention makes it possible to suppress the contact and curing of the two liquids at the tip of the coating nozzle, to suppress clogging of the nozzle tip, and to improve the working efficiency. An object of the present invention is to provide a coating nozzle for a two-component adhesive that can stably obtain a sufficient adhesive strength by stably obtaining an overlapping adhesive layer.

As a result of intensive studies, the present inventors have found that the above problem can be solved by providing one portion at the tip of the coating nozzle, and have completed the present invention.
That is, the application nozzle for a two-component adhesive of the present invention is an application nozzle that discharges the two components of the two-component adhesive so as to merge, and the tip of the cylindrical nozzle body having a tapered tip. The portion is provided with two discharge ports sandwiching the tip surface of the tip portion, and one or more portions extending in the discharge direction beyond the tip surface of the tip portion.

  In this invention, one part can be provided in at least one of the longitudinal direction edge part of the front end surface of the said front-end | tip part.

  In the present invention, one or more parts can be provided on the side surface of the tip.

  According to the present invention, since the two discharge ports are provided at the narrowed tip portion of the cylindrical nozzle body with the tip surface of the tip portion interposed therebetween, the adhesive component discharged from the discharge port is applied. It does not contact at the tip of the nozzle but contacts at the coating surface. Therefore, it is possible to prevent the adhesive from hardening at the tip of the application nozzle. This eliminates the need for cleaning the tip of the coating nozzle and replacing the coating nozzle, thereby improving work efficiency. Furthermore, by grounding one part to the application surface, it is possible to apply two liquids in a state where the application nozzle is pressed against the application surface, so compared to the case where application is performed with the application nozzle floating above the application surface. Since the adhesive layer having a more accurate width and thickness can be formed, the working efficiency can be further improved. Moreover, sufficient adhesive strength can be stably obtained by stably obtaining an adhesive layer in which two liquids overlap.

It is a front view which shows the structure of the coating nozzle which concerns on Embodiment 1 of this invention. It is a side view of the application nozzle of FIG. It is a top view of the application nozzle of FIG. FIG. 4 is a longitudinal sectional view taken along line AA in FIG. 3. It is a front view which shows the structure of the coating nozzle which concerns on Embodiment 2 of this invention. It is a front view which shows the structure of the coating nozzle which concerns on Embodiment 3 of this invention. It is a side view of the application nozzle of FIG. It is a top view of the application nozzle of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a front view showing an example of the structure of the coating nozzle according to the present embodiment. 2 is a side view, and FIG. 3 is a plan view. 4 is a longitudinal sectional view taken along line AA of FIG.

  As shown in FIGS. 1 and 4, the coating nozzle 1 of the present invention includes a nozzle body 2 having a pair of flow paths 6 a and 6 b for two liquids of a two-component adhesive, and a tapered tip of the nozzle body 2. A pair of discharge ports 3a and 3b provided on the portion 4 with the tip surface 7 interposed therebetween, and a pair of portions 5a and 5b provided on both ends in the longitudinal direction of the tip surface 7 and extending in the discharge direction beyond the tip surface 7 Have.

  A cylindrical structure can be used for the nozzle body. The cylindrical structure is provided with two flow paths extending in the longitudinal direction and separated by a partition wall. In the present embodiment, as shown in FIG. 4, the distal end surface of the partition wall 11 becomes the distal end surface 7 of the distal end portion 4 of the nozzle body. In addition, the shape of each part used in the present invention is not particularly limited as long as it can move in a state of being grounded to the coating surface, but a cylindrical shape with a simple structure is preferable.

  Further, the shape of the tip is not particularly limited as long as it has a tapered shape and has a tip surface and a side surface serving as an upper surface, but a trapezoidal shape such as a truncated pyramid or a truncated cone is preferable.

  The two outlets are formed so as to sandwich the distal end surface of the distal end portion, but are formed so as to be symmetrical with respect to the inclined end surface inclined from the distal end of the distal end portion to the base portion with the distal end surface interposed therebetween. By forming the pair of discharge ports on the inclined surface, it is possible to prevent the contact of the adhesive components A and B compared to the case where the discharge port is provided on a non-inclined plane. Thereby, it becomes possible to prevent hardening of the adhesive at the tip of the coating nozzle. The angle of inclination of the inclined surface only needs to be smaller than 90 degrees with respect to the horizontal plane, and can be appropriately set in consideration of the viscosity of the two liquids to be used, the extrusion pressure, and the like.

  Hereafter, the usage method of the coating nozzle of this invention is demonstrated. The application nozzle 1 is used by removably fixing two liquids of a two-component adhesive to a container (not shown) that holds the two liquids by a cylinder, a tube, or the like. Two liquids (hereinafter referred to as adhesive components A and B) extruded from the container using a gun-type extruder pass through the flow paths 6a and 6b, and the discharge ports 3a and 3a at the tip of the nozzle body 2 It is discharged from 3b. When the two portions 5a and 5b are grounded and applied to the bonding surface, the discharged adhesive components A and B merge at the extended region of the tip surface 7 to be in a laminated state. At this time, the adhesive components A and B are not mixed at the discharge ports 3a and 3b.

  According to the present invention, by providing a pair of portions on the tip surface of the tip portion, it is possible to prevent the adhesive components A and B from being mixed at the discharge port. Curing of the agent can be prevented. This eliminates the need for cleaning the tip of the coating nozzle and replacing the coating nozzle, thereby improving work efficiency.

  In addition, by grounding a pair of parts to the application surface, it is possible to apply two liquids repeatedly while the application nozzle is pressed against the application surface. Further, the pair of parts also function as a guide member that prevents the adhesive components A and B from spreading laterally with respect to the application direction and being discharged. Therefore, it is possible to form an adhesive layer with a more accurate width and thickness in a shorter time than when applying with the application nozzle floating above the application surface, which can further improve work efficiency. At the same time, it is possible to stably obtain a sufficient adhesive strength by stably obtaining the adhesive layer in which the two liquids overlap.

  The two-component adhesive using the coating nozzle of the present invention is not particularly limited as long as it is an adhesive using a main agent and a curing agent. For example, acrylic adhesives, unsaturated polyester adhesives, vinyl ester adhesives, epoxy adhesives, and urethane adhesives can be mentioned, but acrylic adhesives are preferred.

  Moreover, the coating device using the coating nozzle of the present invention is not particularly limited as long as the two-component adhesive is applied using the nozzle. For example, what has containers, such as two cylinders and tubes which accommodated two liquids of 2 liquid type adhesives separately, and extrusion machines, such as a gun type which extrudes 2 liquids from the container, can be used.

Embodiment 2. FIG.
FIG. 5 is a front view showing an example of the structure of the coating nozzle according to the present embodiment. The nozzle body 2 has the same configuration as that of the first embodiment except that one end 5a extending in the discharge direction beyond the tip surface 7 is provided at one end in the longitudinal direction of the tip surface 7 of the nozzle body 2.

  According to the present embodiment, the same effect as in the first embodiment can be obtained by applying one part to the adhesive surface while grounding. Moreover, it can manufacture more cheaply by reducing the number of one parts.

Embodiment 3 FIG.
FIG. 6 is a front view showing an example of the structure of the coating nozzle according to the present embodiment. 7 is a side view, and FIG. 8 is a plan view. Four parts 5a, 5b, 5c, 5d are provided in the circumferential direction of the side surface 8 of the tip part 4, except that one part is provided so that the discharge port is located between a pair of adjacent parts. The configuration is the same as that of the first embodiment.

  According to the present embodiment, the same effect as in the first embodiment can be obtained. Further, when the two liquids are applied to the adhesive surface in parallel, the pair of parts 5a, 5b or 5c, 5d can be grounded and applied to the adhesive surface with the tip surface 7 being vertical. . Since two parts can be grounded, an adhesive layer having an accurate width and thickness can be formed in a shorter time than when one part is grounded.

  In the present embodiment, an example is shown in which four parts are provided on the side surface of the tip part, but the number of parts is not limited to four. As long as the outlet is positioned between a pair of adjacent parts, the number of the parts may be three or five or more.

1A, 1B, 1C Coating nozzle 2 Nozzle body 3a, 3b Discharge port 4 Tip part 5a, 5b, 5c, 5d 6a, 6b Channel 7 Tip face 8 Side face 9a, 9b Partition face 10 Nozzle body base 11 Partition wall

Claims (3)

An application nozzle that discharges two liquids of a two-component adhesive so as to merge,
Two or more outlets are provided at the tip of the cylindrical nozzle body having a tapered tip, with the tip surface of the tip sandwiched therebetween, and one or more extending in the discharge direction beyond the tip of the tip A coating nozzle for a two-component adhesive, which is provided with one part.   The coating nozzle according to claim 1, wherein one portion is provided on at least one of longitudinal ends of the distal end surface of the distal end portion.   The coating nozzle according to claim 1, wherein at least one portion is provided on a side surface of the tip portion.

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