Piston for rubber sleeve

Abstract

The piston comprises a body, a sealing portion is arranged at the front end of the body, a sealing skirt edge is correspondingly arranged on the edge of the front end of the body, and the sealing skirt edge inclines towards the outer side of the front end to form a horn shape. The structure that the sealing part is matched with the sealing skirt edge is adopted, air on the inner side of the sealing skirt edge can be squeezed out when the rubber sleeve is plugged, and the structure is simple; the reinforcing ring is additionally arranged at the root of the sealing skirt, so that the strength of the scraper is increased, the sealing performance is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a piston for a glue cylinder. Background Art

[0002] The existing glue pouring method is: when pouring glue into the glue cylinder, push the piston to the bottom, and then pour glue from the glue outlet. The existing glue pouring work has the following defects:

[0003] 1. After the piston is inserted into the rubber cylinder, air will come into contact with the glue. Because there is a large gap between the piston scraper and the body, a lot of air is brought in. During transportation and use, air enters the glue, causing more bubbles when the glue is discharged, which affects the glue output, glue path, etc. In some product applications, especially in the precision electronic products industry, there may be defects such as insufficient glue or glue breakage, resulting in a low yield.

[0004] 2. When the rubber cylinder is not in use, such as when it is subjected to vibration or temperature changes, the piston position is likely to change, causing glue overflow or air inhalation. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide a piston for a rubber cartridge to reduce the air brought into the rubber cartridge when the piston is inserted into the rubber cartridge.

[0006] In order to solve the above technical problems, the embodiment of the utility model proposes a piston for a rubber cartridge, including a main body, a sealing portion is provided at the front end of the main body, a sealing skirt is correspondingly provided at the front end edge of the main body, and the sealing skirt is inclined toward the outer side of the front end in a trumpet shape; a damping ring is provided at the end of the main body.

[0007] Furthermore, the damping ring is inclined toward the rear end and outward to form a trumpet shape.

[0008] Furthermore, a reinforcement ring is provided at the root of the outer side of the sealing skirt.

[0009] Furthermore, the cross section of the reinforcement ring is triangular, semicircular, square or polygonal.

[0010] Furthermore, the length of the sealing portion is greater than the sealing skirt.

[0011] Furthermore, a middle portion of the front end of the sealing portion is convex.

[0012] The beneficial effects of the utility model are as follows: the utility model adopts a structure in which the sealing part and the sealing skirt are matched, and the air on the inner side of the sealing skirt can be squeezed out when the rubber cylinder is inserted, and the structure is simple; the utility model adds a reinforcing ring at the root of the sealing skirt, which increases the scraper strength, improves the sealing performance and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a three-dimensional structural diagram of a piston for a rubber cartridge according to an embodiment of the utility model at one angle.

[0014] Figure 2 It is a three-dimensional structural diagram of the piston for the rubber cartridge of the embodiment of the utility model from another angle.

[0015] Figure 3 It is a structural schematic diagram of the rubber cylinder when the rubber cylinder piston is inserted into the rubber cylinder according to the embodiment of the utility model.

[0016] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle.

[0017] Description of Figure Numbers

[0018] Main body 1, sealing part 2, sealing skirt 3, damping ring 4, reinforcement ring 5, rubber cylinder 6. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present utility model is further described in detail below in conjunction with the drawings and specific embodiments.

[0020] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back, etc.), they are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0022] Please refer to Figure 1 to Figure 4 The piston for the rubber cartridge of the utility model embodiment includes a body. A columnar sealing portion is provided at the front end of the body. A sealing skirt is provided at the front edge of the body, and the sealing skirt is inclined toward the outside of the front end in a trumpet shape. The utility model adopts a structure in which the sealing portion and the sealing skirt cooperate, and the "air-containing" space is greatly reduced, and the air that can be brought in is much smaller than that of the existing piston, thereby improving the process yield.

[0023] A damping ring is provided at the end of the body. The damping ring is tilted toward the rear end and outward to form a trumpet shape. The damping ring increases the resistance of the piston to retreat and prevents the piston from retreating when not in use.

[0024] As an embodiment, one or more reinforcement rings are provided at the root of the outer side of the sealing skirt. The reinforcement rings can facilitate demoulding and increase the strength of the scraper. The cross section of the reinforcement ring is triangular, semicircular, square or other polygonal.

[0025] As an implementation method, the length of the sealing portion is greater than the sealing skirt, and the middle portion of the front end of the sealing portion is raised, so as to facilitate the insertion of the piston into the rubber cylinder.

[0026] When the piston of the present invention is inserted into the rubber cylinder, there is no gap between the sealing portion and the sealing skirt, which reduces the "air holding" space and greatly reduces the introduction of air.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piston for a rubber cartridge, comprising a body, characterized in that: A sealing part is arranged at the front end of the body, and a sealing skirt is arranged at the front edge of the body correspondingly. The sealing skirt is inclined toward the outside of the front end in a trumpet shape; a damping ring is arranged at the end of the body.

2. The piston for a rubber cartridge according to claim 1, characterized in that: The damping ring is inclined toward the rear end and outward to form a trumpet shape.

3. The piston for a rubber cartridge according to claim 1, characterized in that: A reinforcement ring is provided at the outer root of the sealing skirt.

4. The piston for a rubber cartridge according to claim 3, characterized in that: The cross section of the reinforcement ring is triangular, semicircular, square or polygonal.

5. The piston for a rubber cartridge according to claim 1, characterized in that: The length of the sealing portion is greater than the sealing skirt.

6. The piston for a rubber cartridge according to claim 1, characterized in that: The middle part of the front end of the sealing part is convex.

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