Concentric rubber tube for two-component adhesive

Abstract

The invention relates to the technical field of concentric rubber tubes, and aims to provide a concentric rubber tube for a two-component adhesive, the concentric rubber tube comprises an outer tube and an inner tube which are concentrically arranged, the inner tube is made of a soft material, a first storage bin for storing a first-component adhesive is formed in an inner cavity of the inner tube, the outer tube is made of a hard material, and the outer tube is made of a hard material. A second storage bin used for storing a second component adhesive is formed between the outer pipe and the inner pipe, one end of the outer pipe is provided with an adhesive outlet, one end of the inner pipe is connected with an inner connecting pipe, the inner connecting pipe corresponds to the adhesive outlet, and the inner connecting pipe is used for extruding the first component adhesive; the inner connecting pipe has the beneficial effects that the inner pipe is a soft tubular object, and the problem that the extruded part of the first component adhesive is broken due to external force and the like is solved; the first component adhesive and the second component adhesive can be synchronously extruded outwards through the piston, and the operation can be achieved only through a common single-component adhesive gun.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concentric rubber tube, more particularly, it relates to a concentric rubber tube for two-component adhesive. BACKGROUND

[0002] Two-component adhesive is widely used in electronic packaging, structural bonding, automotive and industrial assembly fields, and its typical feature is that two adhesives need to be stored separately before use, and then extruded and mixed simultaneously according to the specified ratio. Therefore, double-cavity rubber tube, concentric tube rubber tube or parallel rubber tube are commonly used as packaging and adhesive supply carriers in the market.

[0003] In the prior art, a concentric circle packaging rubber tube for two-component adhesive has been disclosed, which forms a first fluid storage area and a second fluid storage area by two hollow cylinders arranged concentrically inside and outside, so as to realize the synchronous storage and extrusion of two-component adhesive. The invention patent No. CN207360987U discloses a concentric circle packaging rubber tube for two-component adhesive, which can meet the basic use requirements of two-component adhesive in structure, and can adapt to different mixing ratio requirements by changing the volume ratio of the two storage areas. However, the above prior art still has the following disadvantages in actual use: 1. The inner hollow cylinder in the inside is made of hard material, and the connection between the inner hollow cylinder and the adhesive outlet is easy to break. Once the breakage occurs, the adhesive product is invalid and cannot be used; 2. The structure needs two pistons (i.e. the first fluid bottom cover and the second fluid bottom cover recorded in the patent document) to drive the adhesives in the first fluid storage area and the second fluid storage area to extrude outward respectively; 3. The two-component adhesive needs to be extruded outward by matching a special two-component glue gun in use, which has poor universality; and the reaction force of the two components is large, so that the glue gun needs a lot of force to complete, which makes it difficult to glue; 4. Some adhesives have certain penetration force to plastic, which shortens the storage period of the two-component adhesive.

[0004] Therefore, a new two-component adhesive packaging rubber tube is needed to solve the technical problems encountered in the actual operation. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a concentric rubber tube for two-component adhesive to solve the technical problems mentioned in the background art.

[0006] To achieve the above object, the application provides the following technical scheme: a concentric rubber tube for two-component adhesive, comprising an inner tube and an outer tube arranged concentrically, the inner tube is made of soft material and arranged inside the outer tube, a first storage chamber for storing the first component adhesive is formed in the inner cavity of the inner tube, the outer tube is made of hard material, a second storage chamber for storing the second component adhesive is formed between the inner wall of the outer tube and the outer wall of the inner tube, one end of the outer tube is provided with a glue outlet, one end of the inner tube inside the outer tube is closed, the other end of the inner tube is connected with an inner connecting tube, the inner connecting tube is arranged inside the glue outlet and corresponds to the glue outlet, the inner connecting tube is used for extruding the first component adhesive, and a gap between the glue outlet and the inner connecting tube is used for extruding the second component adhesive.

[0007] By adopting the above technical scheme, the inner tube is a soft tubular object, and the extrusion part of the first component adhesive will not be broken by external force; the piston is acted on by the single-component glue gun, the piston extrudes the space of the second storage chamber, the second component adhesive is extruded out of the glue outlet, at the same time, the piston is synchronously acted on the inner tube, the first component adhesive in the inner tube is extruded out of the inner connecting tube; during the extrusion process, the inner tube will expand outward under the action of pressure, but the second component adhesive in the second storage chamber will compress the inner tube under the action of pressure, so that the inner and outer pressures are balanced, and the inner tube package is prevented from being pressed and exploded.

[0008] The application is further provided that the glue outlet has a connecting structure matched with the inner connecting tube, a channel for extruding the second component adhesive is formed between the connecting structure and the inner connecting tube, and the channel is communicated with the gap.

[0009] The application is further provided that the inner connecting tube comprises a T-shaped tube body and a connecting ring, and the tube opening of the inner tube is fixed and clamped between the T-shaped tube body and the connecting ring.

[0010] The application is further provided that the connecting structure is composed of a plurality of connecting blocks, the connecting blocks are fixed at equal intervals in the circumferential direction on the inner wall of the glue outlet, the connecting blocks are located outside the connecting ring, and the connecting ring is in interference fit with the connecting blocks.

[0011] The application is further provided that the gap between any two adjacent connecting blocks serves as the channel for extruding the second component adhesive.

[0012] The application is further provided that the outer wall of the glue outlet is provided with a connecting thread, and the connecting thread is used for connecting with an externally arranged mixing tube.

[0013] The application is further provided that the outer tube, the glue outlet, the connecting structure and the connecting thread are integrally formed.

[0014] The application is further provided that the piston is movably arranged in the open end of the outer tube, and an exhaust valve is arranged on the piston and used for exhausting air in the outer tube during glue filling.

[0015] Compared with the prior art, the concentric glue pipe for two-component adhesives has the following beneficial effects: 1. The inner tube is a soft tubular object, and the first-component adhesive extrusion part will not be broken by external force, thereby avoiding the mixing failure of the two-component adhesive as much as possible.

[0016] 2. The piston can act on the soft inner tube and the second-component adhesive at the same time, so that the first-component adhesive and the second-component adhesive can be extruded synchronously. Therefore, in actual operation, only a common single-component glue gun can be used to extrude the two-component adhesive.

[0017] 3. During the extrusion process, the inner tube will have a tendency to expand outward under pressure, but the second-component adhesive located in the second storage bin will compress the inner tube under pressure, so as to balance the inner and outer pressures and avoid the inner tube package from being burst; at the same time, pressure balance can also be achieved to uniformly extrude the first-component adhesive and the second-component adhesive. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the concentric glue pipe for two-component adhesives. Figure 2 It is a schematic diagram of the bottom view structure of the concentric glue pipe for two-component adhesives. Figure 3 It is a schematic diagram of the structure of the concentric glue pipe for two-component adhesives from another angle. Figure 1 It is a schematic diagram of the structure of the concentric glue pipe for two-component adhesives from another angle. Figure 4 It is a schematic diagram of the cross-sectional structure of the concentric glue pipe for two-component adhesives. Figure 5 It is a schematic diagram of the cross-sectional structure of the concentric glue pipe for two-component adhesives from another angle.

[0019] In the figure: 1, inner tube; 101, first storage bin; 2, outer tube; 201, second storage bin; 3, glue outlet; 4, piston; 5, inner connecting tube; 501, T-shaped tube body; 502, connecting ring; 6, connecting structure; 601, connecting block; 7, connecting thread; 8, exhaust valve. DETAILED DESCRIPTION

[0020] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0024] like Figures 1-5 As shown, a concentric tube for a two-component adhesive includes an inner tube 1 and an outer tube 2 arranged concentrically. The inner tube 1 is disposed inside the outer tube 2. The inner cavity of the inner tube 1 forms a first storage chamber 101 for storing the first component adhesive. A second storage chamber 201 for storing the second component adhesive is formed between the inner wall of the outer tube 2 and the outer wall of the inner tube 1. One end of the outer tube 2 is provided with an adhesive outlet 3, and a piston 4 is slidably provided on the inner side of the other end. One end of the inner tube 1 located inside the outer tube 2 is closed, and the other end is connected to an inner connecting tube 5, which is located inside the adhesive outlet 3. The inner connecting tube 5 is used for extruding the first component adhesive, and the gap between the adhesive outlet 3 and the inner connecting tube 5 is used for extruding the second component adhesive. The adhesive outlet 3 has a connecting structure 6 that cooperates with the inner connecting tube 5. A channel for extruding the second component adhesive is formed between the connecting structure 6 and the inner connecting tube 5, and the channel communicates with the gap.

[0025] The inner tube 1 is made of a soft material, which can be made of soft plastic or aluminum-plastic film. When the first component adhesive has strong permeability, aluminum-plastic film is chosen to achieve a certain isolation effect. The outer tube 2 is made of a rigid material, such as PP, PA, PBT or aluminum; The closed end of the inner tube 1 can be closed by a metal buckle, by heat sealing, or by other sealing methods that can achieve a seal.

[0026] Specifically, the open end of the inner tube 1 is connected to the inner connecting tube 5, and the inner connecting tube 5 extends into the outlet 3. The closed end of the inner tube 1 is located in the outer tube 2. The piston 4 is movably located inside the outer tube 2 and can slide along the axis of the outer tube 2 against the inner wall of the outer tube 2.

[0027] More specifically, the piston 4 is equipped with an exhaust valve 9, which is used to expel air from the outer tube 2 during glue dispensing.

[0028] like Figures 4-5 As shown, the inner connecting tube 5 includes a T-shaped tube body 501 and a connecting ring 502. The inner tube 1 is fixedly clamped between the T-shaped tube body 501 and the connecting ring 502. The inner tube 1 is fixed by the cooperation of the T-shaped tube body 501 and the connecting ring 502.

[0029] The connecting structure 6 is composed of several connecting blocks 601. The several connecting blocks 601 are fixed at equal intervals along the circumferential direction on the inner wall of the dispensing port 3. The connecting ring 502 is correspondingly arranged with the inner connecting tube 5. The connecting blocks 601 are located outside the connecting ring 502, and the connecting ring 502 and the connecting blocks 601 are interference fit.

[0030] Specifically, the inner tube 1 is sleeved outside the inner connecting tube 5, and the connecting ring 502 corresponds to the tube body 501 of the inner connecting tube 5 and is sleeved outside the entire inner tube 1 and the inner connecting tube 5 to achieve a fixed connection of the inner tube 1. The connecting block 601 is integrally formed with the dispensing port 3, and there is a channel between two adjacent connecting blocks 601 for the second component adhesive to be extruded. During assembly, the inner tube 1, the inner connecting tube 5, and the connecting ring 502 are inserted into the outer tube 2 as a whole, and the connecting ring 502 is interference-fitted with the connecting block 601 to realize the assembly of the inner tube 1 and the outer tube 2.

[0031] like Figure 1 As shown, the outer wall of the dispensing port 3 is provided with a connecting thread 7, which is used to connect with the external mixing pipe.

[0032] The outer tube 2, the glue outlet 3, and the connecting thread 7 are integrally formed.

[0033] Specifically, when packaging, selling or storing the finished product, the connecting thread 7 is connected to the corresponding sealing cap to seal and preserve the two-component adhesive inside the concentric tube. When using this product, the connecting thread 7 is connected to the corresponding mixing tube so that the two-component adhesive can be fully mixed in the mixing tube during extrusion.

[0034] In practical applications, the product is connected to the corresponding mixing tube and installed in a single-component glue gun. The piston 4 is driven by the single-component glue gun to slide in the outer tube 2 and squeeze the second component adhesive and the first component adhesive in the inner tube 1 to be squeezed out simultaneously, so that the two components of adhesive are fully mixed in the mixing tube and then coated on the product surface. During the extrusion process, the inner tube 1 will tend to expand outward under pressure, but the second component adhesive located in the second storage chamber 201 will compress the inner tube 1 under pressure, so that the internal and external pressures are balanced and the inner tube 1 packaging is prevented from being crushed.

[0035] In all the solutions mentioned above, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concentric hose for two-component adhesives, characterized in that The adhesive outlet (3) has a connecting structure (6) matched with the inner connecting pipe (5), and a channel for extruding the second component adhesive is formed between the connecting structure (6) and the inner connecting pipe (5), which is communicated with the gap. The inner connecting pipe (5) comprises a T-shaped pipe body (501) and a connecting ring (502), and the pipe opening of the inner pipe (1) is fixed and clamped between the T-shaped pipe body (501) and the connecting ring (502). The connecting structure (6) is composed of a plurality of connecting blocks (601), and the plurality of connecting blocks (601) are fixed on the inner wall of the adhesive outlet (3) at equal intervals in the circumferential direction. The connecting block (601) is located outside the connecting ring (502), and the connecting ring (502) is in interference fit with the connecting block (601). The gap between any two adjacent connecting blocks (601) serves as a channel for extruding the second component adhesive. The outer wall of the adhesive outlet (3) is provided with a connecting thread (7) for connecting with an externally arranged mixing pipe.

2. A concentric tube for two-component adhesive according to claim 1, characterized in that ​ 3. A concentric tube for two-component adhesives according to claim 2, characterized in that ​ 4. A concentric tube for two-component adhesive according to claim 3, characterized in that ​ ​ 5. A concentric tube for two-component adhesives according to claim 4, characterized in that ​ 6. A concentric tube for two-component adhesives according to claim 1, characterized in that ​

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