Glue injection auxiliary film

Abstract

The glue injection auxiliary membrane is characterized by comprising an injection end membrane and an outlet end membrane, the injection end membrane is arranged and connected to the injection end of the pipe fitting, the outlet end membrane is arranged and connected to the outlet end of the pipe fitting, an injection hole is formed in the center of the injection end membrane, a plurality of exhaust holes are formed in the outlet end membrane at intervals, and the exhaust holes are communicated with the injection end membrane. The side, provided with the pressure-sensitive adhesive, of the injection end diaphragm is adhered to the injection end of the pipe fitting, similarly, the outlet end diaphragm is adhered to the outlet end of the pipe fitting, a needle head of a glue injection gun is inserted from an injection hole in the injection end diaphragm to inject glue into the pipe fitting, and air in the pipe fitting is extruded out from an exhaust hole in the outlet end diaphragm; the problem of forming a cavity is reduced; when glue flows out of all the exhaust holes in the outlet end membrane, it is indicated that the interior of the pipe fitting is filled with the glue, the two ends of the pipe fitting are each provided with an auxiliary membrane for blocking, and the problem that glue lacks at the end opening position of the pipe fitting is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of glue injection for aircraft assembly pipes, in particular to a glue injection auxiliary film. Background Art

[0002] During aircraft assembly and maintenance, many pipes and fittings require glue injection. Most of the glue used is a room-temperature curing organic glue with high viscosity and poor fluidity. Furthermore, most of the pipes and fittings requiring glue injection are open at both ends, some of which are long, and some have large cross-sectional areas.

[0003] The current method for injecting glue into pipe fittings is to cover one end of the pipe fitting with a simple cardboard, and then use a glue gun to inject glue into the pipe fitting from the other end until the glue overflows from the end covered by the simple cardboard, thus completing the glue injection operation of the pipe fitting. However, this operation method is not suitable for pipe fittings with a long length. Due to the poor fluidity of the glue, it is easy to form a cavity inside the pipe fitting during the glue injection process. For pipe fittings with a large cross-section, since the glue injection end of the pipe fitting is not blocked during the glue injection and the outlet end of the pipe fitting is simply covered with cardboard, it is easy to form a lack of glue at the end of the pipe fitting.

[0004] There is also a method of only adding a blockage to the outlet end of the pipe fitting, which makes it difficult for the gas in the pipe to be discharged during glue injection, thereby forming a cavity. Whether it is a problem of lack of glue or the generation of a cavity, it does not meet the quality requirements and reduces the glue injection quality of the pipe fitting.

[0005] Therefore, the present invention designs a glue injection auxiliary film to solve the above problems. Utility Model Content

[0006] In response to the above technical problems, the utility model provides an auxiliary film for glue injection. Auxiliary diaphragms are bonded to both ends of the pipe fitting, and exhaust holes are provided on the diaphragm at the outlet end. Therefore, during the process of continuous pressurized glue injection, the air in the pipe fitting is squeezed out and no cavity is formed. The auxiliary diaphragm has a sealing effect, so no glue shortage will occur near the end face.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] The glue injection auxiliary membrane is characterized in that it includes an injection end membrane and an outlet end membrane, the injection end membrane is arranged to be connected to the injection end of the pipe fitting, the outlet end membrane is arranged to be connected to the outlet end of the pipe fitting, an injection hole is arranged at the center of the injection end membrane, and a plurality of exhaust holes are arranged at intervals on the outlet end membrane.

[0009] One side of the injection end membrane and the outlet end membrane is provided with a pressure sensitive adhesive.

[0010] The shapes of the injection end diaphragm and the outlet end diaphragm are the same as the cross-section of the pipe fitting, and the sizes of the injection end diaphragm and the outlet end diaphragm are larger than the cross-section of the pipe fitting, so that the injection end diaphragm and the outlet end diaphragm are respectively glued and connected to the injection end and outlet end of the pipe fitting.

[0011] Specifically, a backing layer is provided on the side of the injection end membrane and the outlet end membrane where the pressure sensitive adhesive is provided.

[0012] Specifically, an ear piece is provided at a corner of the injection end membrane and the outlet end membrane to facilitate the tearing operation.

[0013] Specifically, the injection end diaphragm and the outlet end diaphragm are made of a cloth-based acrylic adhesive material, and the thickness of the diaphragm is 290μ.

[0014] Specifically, the backing layer is supported by a high-density polyethylene plastic film, and the thickness of the backing layer is 100 μ.

[0015] Beneficial effects of the utility model:

[0016] Before use, the utility model removes the backing layer of the diaphragm along the half-cut line on the backing layer, and then sticks the side of the injection end diaphragm provided with the pressure-sensitive adhesive to the injection end of the pipe fitting. Similarly, the outlet end diaphragm is stuck to the outlet end of the pipe fitting, and slight pressure needs to be applied to the auxiliary diaphragm to ensure that the auxiliary diaphragm is firmly stuck. Then, the needle of the glue gun is inserted from the injection hole on the injection end diaphragm to inject glue into the interior of the pipe fitting. The air in the pipe fitting is squeezed out from the exhaust hole on the outlet end diaphragm, thereby reducing the problem of cavity formation.

[0017] When glue flows out of all the vent holes on the outlet diaphragm, it means that the glue inside the pipe has been filled. Auxiliary diaphragms are installed at both ends of the pipe for sealing to avoid glue shortage at the pipe port. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model in which the glue injection auxiliary membrane is installed behind the pipe;

[0019] Figure 2 This is a schematic diagram of the exploded structure of the utility model after the glue injection auxiliary membrane is installed on the pipe;

[0020] Figure 3 This is a schematic diagram of the initial structure of the injection end membrane of the glue injection auxiliary membrane of the utility model;

[0021] As shown in the figure: 100. Pipe fitting, 1. Injection end diaphragm, 11. Injection hole, 12. Ear piece, 2. Outlet end diaphragm, 21. Exhaust hole, 3. Backing layer, 31. Half-cut line. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1

[0026] As shown in the figure, the injection end diaphragm 1 and the outlet end diaphragm 2 are made of a cloth-based acrylic adhesive material, and the thickness of the two diaphragms is set to 290μ. Pressure-sensitive adhesive is provided on one side of the injection end diaphragm 1 and the outlet end diaphragm 2. Before the diaphragms are not attached to the pipe 100, a backing layer 3 is provided on the side of the diaphragm with the pressure-sensitive adhesive. The backing layer 3 is supported by a high-density polyethylene plastic film, and the thickness of the backing layer 3 is set to 100μ. The backing layer 3 is pre-set to a half-cut structure, so a half-cut line 31 is formed in the middle of the backing layer 3, and the backing layer 3 is easily torn off at the half-cut line 31.

[0027] The shapes of the injection end diaphragm 1 and the outlet end diaphragm 2 are the same as the cross-section of the pipe 100 to be injected with glue, and the size of the diaphragm is slightly larger than the cross-section of the pipe 100, so that the injection end diaphragm 1 and the outlet end diaphragm 2 are respectively pasted and connected to the injection end and outlet end of the pipe 100. The injection end diaphragm 1 is arranged to be connected to the injection end of the pipe 100, and an injection hole 11 is provided at the center position of the injection end diaphragm 1. The outlet end diaphragm 2 is arranged to be connected to the outlet end of the pipe 100, and a number of exhaust holes 21 are arranged at intervals on the outlet end diaphragm 2. Among them, an ear piece 12 is provided at a corner of the injection end diaphragm 1 and the outlet end diaphragm 2 to facilitate the tearing off of the diaphragm after the injection is completed.

[0028] Example 2

[0029] When using the present invention, first remove the backing layer 3 on the side of the auxiliary diaphragm with the pressure-sensitive adhesive, tear off the backing layer 3 along the half-cut line 31 on the backing layer 3, and then stick the side of the injection end diaphragm 1 with the pressure-sensitive adhesive to the injection end of the pipe 100. Similarly, stick the outlet end diaphragm 2 to the outlet end of the pipe 100. When sticking the auxiliary diaphragm, apply slight pressure to ensure that the auxiliary diaphragm is firmly stuck.

[0030] After the auxiliary diaphragm is pasted, the needle of the glue injection gun is inserted into the injection hole 11 on the injection end diaphragm 1 to inject glue into the pipe 100. The air in the pipe 100 is squeezed out from the exhaust holes 21 on the outlet end diaphragm 2 to reduce the problem of cavity formation. When glue flows out of all the exhaust holes 21 on the outlet end diaphragm 2, it indicates that the glue inside the pipe 100 has been filled. Auxiliary diaphragms are provided at both ends of the pipe 100 for sealing to avoid the problem of glue shortage at the port position of the pipe 100. After the glue injected into the pipe 100 is cured, the diaphragms at both ends are removed through the ear pieces 12 on the auxiliary diaphragms.

[0031] It should be noted that the pressure-sensitive adhesive applied to one side of the injection-end diaphragm 1 and the outlet-end diaphragm 2 allows for adhesion to the end face of the pipe 100 by pressing, and this pressure-sensitive adhesive does not react with the glue used for injection and does not remain on the end face of the pipe 100. Furthermore, the injection-end diaphragm 1 and the outlet-end diaphragm 2 are made of a cloth-based acrylic adhesive material. This material is soft and can conform to curved surfaces. The diaphragms have a certain strength (breaking stress of 90 N / cm) and a certain elasticity (breaking elongation of 12%). Therefore, during injection, the diaphragms made of this material can withstand the injection pressure without tearing. Furthermore, the pressure-sensitive adhesive applied to one side of the diaphragms has excellent adhesion, with a peel strength of 4.7 N / cm. Therefore, they can be firmly bonded to the end face of the pipe and can withstand the injection pressure without detaching during injection.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. The various components mentioned in the present invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in this utility model is defined by the appended claims and their equivalents.

Claims

1. Glue injection auxiliary film, characterized in that It includes an injection end diaphragm and an outlet end diaphragm. The injection end diaphragm is arranged and connected to the injection end of the pipe fitting, and the outlet end diaphragm is arranged and connected to the outlet end of the pipe fitting. An injection hole is arranged at the center of the injection end diaphragm, and a plurality of exhaust holes are arranged at intervals on the outlet end diaphragm.

2. The glue injection auxiliary film according to claim 1, characterized in that One side of the injection end membrane and the outlet end membrane is provided with pressure-sensitive adhesive.

3. The glue injection auxiliary film according to claim 1, characterized in that The shapes of the injection end diaphragm and the outlet end diaphragm are the same as the cross section of the pipe fitting, and the sizes of the injection end diaphragm and the outlet end diaphragm are larger than the cross section of the pipe fitting.

4. The glue injection auxiliary film according to claim 2, characterized in that A backing layer is provided on one side of the injection end membrane and the outlet end membrane where the pressure sensitive adhesive is provided.

5. The glue injection auxiliary film according to claim 1, characterized in that An ear piece is provided at a corner of the injection end diaphragm and the outlet end diaphragm.

6. The glue injection auxiliary film according to claim 1, characterized in that The injection end diaphragm and the outlet end diaphragm are made of a cloth-based acrylic adhesive material.

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