Sand blasting machine

Abstract

The utility model discloses a sand blasting machine which comprises a machine shell and an observation window assembly arranged on the machine shell, and is characterized in that the observation window assembly comprises an observation window body arranged on the machine shell, and an operator can observe the working state of the sand blasting machine through the observation window body; the protective films are arranged on the inner side of the observation window body and used for protecting the observation window body against sand adhesion or erosion, and at least two layers of protective films are sequentially stacked and can be torn down layer by layer. According to the sand blasting machine, at least two layers of protective films are arranged on the observation window body, so that when the sand blasting machine works, gravels are attached to or erode the protective films, and therefore the observation window is protected; and the light transmission of the observation window assembly can be recovered by tearing off the protective film on the outermost layer.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting machine technology, and in particular to a sandblasting machine. Background Technology

[0002] Sandblasting machines are commonly used industrial equipment for post-treatment of parts surfaces. They utilize compressed air to propel abrasive particles to the part surface, improving its appearance through the scouring action of the abrasive particles. An observation window (usually made of glass or acrylic) is a crucial component for the normal operation of a sandblasting machine. For example, Chinese utility model patent ZL202222185861.4 discloses a sandblasting machine with a housing. A fixing plate is embedded in the upper part of one side of the housing, and an observation window is embedded inside the fixing plate. Operators can observe the equipment's operating status and monitor the progress of the sandblasting operation through the observation window. However, during operation, due to the high-speed abrasion of the abrasive particles, the surface of the observation window inevitably accumulates abrasive particles or is corroded by them, reducing its light transmittance and obstructing the operator's view. This hinders the operator's ability to observe the progress, potentially leading to over-blasting, which not only affects the quality of the sandblasting but also wastes the abrasive material.

[0003] To allow operators to observe the working status of the sandblasting machine in a timely manner, the observation window usually needs to be replaced frequently. However, replacing the observation window not only requires interrupting production but is also time-consuming and labor-intensive, seriously affecting production efficiency and costs. To address this, Chinese utility model patent ZL202222275932.X discloses "An Environmentally Friendly Sandblasting Machine." This sandblasting machine is equipped with a cleaning component. When sand adheres to the observation window and obstructs observation, the motor controller activates a forward and reverse motor, which drives a lead screw to rotate. Through threaded transmission, this drives a moving plate in a linear motion, causing a rubber strip to slide across the observation window and promptly scrape off the sand adhering to it.

[0004] While the aforementioned sandblasting machine can automatically scrape sand off the observation window, preventing sand accumulation from obstructing vision, it still suffers from the following problems: First, the cleaning component has a complex structure, requiring a motor drive and threaded transmission to clean the observation window with rubber strips. A malfunction in any part of this structure will prevent the cleaning component from functioning properly, and its complexity makes maintenance and replacement difficult. Second, the cleaning component removes sand adhering to the observation window by sliding rubber strips. However, if the sand corrodes the observation window, the cleaning component cannot be used; it only extends the window's lifespan. When the observation window is corroded to the point where the sandblasting machine's operation cannot be observed, it still needs to be replaced. In conclusion, existing sandblasting machines require improvement. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a sandblasting machine that can maintain the light transmittance of the observation window and has a simple structure that is easy to maintain, in light of the existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: the sandblasting machine includes a housing and an observation window assembly disposed on the housing, characterized in that: the observation window assembly includes:

[0007] The observation window body is located on the machine housing, allowing the operator to observe the working status of the sandblasting machine through the observation window body;

[0008] A protective film is disposed on the inner side of the observation window body to protect the observation window body from sand adhesion or erosion. The protective film is stacked in at least two layers and can be peeled off layer by layer.

[0009] To secure the protective film to the observation window body, preferably, a spring clip is provided on one side of the observation window body, and a limiting post is provided on the other side. Correspondingly, the protective film has a first limiting hole for the limiting post to pass through and be limited. The side of the protective film away from the first limiting hole is clamped to the observation window body by the spring clip. Through the fixing method of the spring clip and the limiting post, each layer of protective film can be independently limited on the limiting post. Adjacent layers of protective film can be stacked by folding or staggering, thereby preventing the layers from sticking together and making it impossible to peel them off layer by layer.

[0010] To confine the protective film on the first limiting post, preferably, the limiting post includes a post body and a limiting part located on the upper part of the post body. The radius r1 of the limiting part, the radius r2 of the first limiting hole, and the radius r3 of the post body satisfy the following relationship: r1 ≥ r2 ≥ r3, thereby achieving the following: the limiting part confines the protective film on the post body. If the radius r2 of the first limiting hole is too large, it cannot be confined on the post body by the limiting part; while if the radius r2 of the first limiting hole is too small, the post body cannot pass through it. Therefore, the relationship between the radius r2 of the first limiting hole, the radius r1 of the limiting part, and the radius r3 of the post body is limited to: r1 ≥ r2 ≥ r3.

[0011] To facilitate the peeling off of the protective film layer by layer, preferably, the protective film is at least partially folded on the side adjacent to the first limiting hole to form a folded portion. A second limiting hole is provided on the folded portion, and the radius r4 of the second limiting hole satisfies the condition r4 > r1 with respect to the limiting portion. The upper layer of the protective film limits the folded portion of the lower layer of the protective film to the column. Thus, after the upper layer of the protective film is peeled off, the folded portion of the lower layer automatically unfolds due to the loss of constraint from the upper layer. However, if the radius r4 of the second limiting hole is smaller than the radius r1 of the limiting portion, the folded portion will still be limited to the column even without the constraint of the upper layer. Therefore, to ensure that the folded portion of the lower layer automatically unfolds after the upper layer is peeled off, the radius r4 of the second limiting hole is designed to be larger than the radius r1 of the limiting portion. Simultaneously, the folded portion also serves as a force-applying part for peeling the protective film; the operator pinches the folded portion and pulls it outwards to peel off the protective film.

[0012] To facilitate the removal of the protective film, preferably, the protective film has an easy-tear line on the side near the spring clip.

[0013] In order to position the protective film on the observation window body, preferably, the observation window body is also provided with at least two positioning posts for positioning the protective film, and the protective film is provided with corresponding positioning holes.

[0014] Preferably, the layers of the protective film are bonded together using a low-tack material. Bonding the layers together prevents sand from entering between the layers and adhering to the other protective films except the outermost one, ensuring that sand can only adhere to or erode the outermost protective film. Using a low-tack material also prevents multiple films from sticking together, ensuring that the protective films can be peeled off layer by layer.

[0015] To mount the observation window assembly onto the housing, preferably, the observation window assembly further includes a mounting component for mounting the observation window body inside the housing. A first sealing gasket is provided between the observation window body and the mounting component, and a second sealing gasket is provided between the observation window body and the housing. The provision of the first and second sealing gaskets ensures the airtightness within the housing.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] 1. The sandblasting machine has at least two protective films on the observation window body. When the sandblasting machine is working, the sand and gravel will adhere to or erode the protective film, thereby protecting the observation window. When the outermost protective film is covered with a lot of sand and gravel or is eroded to the point that it is no longer possible for the operator to observe the working status of the sandblasting machine, the outermost protective film can be peeled off to restore the light transmittance of the observation window component.

[0018] 2. The observation window assembly has a simple structure. The light transmittance of the observation window assembly can be restored simply by peeling off the protective film layer by layer. It is easy to maintain and has low cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the protective film in an embodiment of this utility model. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-2 The image shows a preferred embodiment of the present invention. The sandblasting machine of this embodiment includes a housing and an observation window assembly disposed on the housing. The observation window assembly includes an observation window body 1 mounted inside the housing by means of a mounting member 6. The operator can observe the working status of the sandblasting machine through the observation window body 1. A first sealing gasket 7 is disposed between the observation window body 1 and the mounting member 6, and a second sealing gasket 8 is disposed between the observation window body 1 and the housing to ensure good sealing within the housing.

[0023] The observation window assembly also includes a protective film 2 located inside the observation window body 1. This protective film 2 protects the observation window body 1 from sand adhesion or erosion. In this embodiment, a flexible and wear-resistant protective film 2 is used to ensure service life and good light transmittance. The protective film 2 has multiple layers, with each layer stacked sequentially. When the outermost protective film 2 is adhered to or eroded by sand, it can be peeled off layer by layer to restore the light transmittance of the observation window assembly. Specifically, a spring clip 3 is provided on one side of the observation window body 1, and a limiting post 4 is provided on the other side. The protective film 2 has a corresponding first limiting hole 21 for the limiting post 4 to pass through and be limited. The first limiting hole 21 limits the limiting post 4. The side of the protective film 2 away from the first limiting hole 21 is clamped to the observation window body 1 by the spring clip 3, thereby independently limiting each layer of the protective film 2 to the limiting post 4. The limiting post 4 includes a post body 4a and a limiting part 4b located on the upper part of the post body 4a. In order to limit the protective film 2 on the first limiting post 4, the radius r1 of the limiting part 4b, the radius r2 of the first limiting hole 21, and the radius r3 of the post body 4a satisfy the following relationship: r1≥r2≥r3, thereby realizing that the limiting part 4b limits the protective film 2 on the post body 4a. In order to position the protective film 2, this embodiment provides four positioning posts 5 on the observation window body 1, and each layer of protective film 2 is provided with four layers of positioning holes 24.

[0024] In this embodiment, to avoid the protective films 2 from sticking together and becoming impossible to peel off layer by layer, the protective films 2 of adjacent layers are stacked by folding. The protective film 2 is folded to form a folded portion 2a near the first limiting hole 21. A second limiting hole 22 is provided on the folded portion 2a, which is also limited by the limiting post 4. The protective film 2 of the upper layer limits the folded portion 2a of the protective film 2 of the lower layer to the post 4a. When the upper protective film 2 is peeled off, the folded portion 2a of the lower protective film 2 automatically unfolds due to the loss of constraint from the upper protective film 2. Simultaneously, the folded portion 2a also serves as a force application point for peeling the protective film 2; the operator pinches the folded portion 2a and pulls it outwards to peel off the protective film 2. To achieve automatic unfolding of the folded portion 2a, the radius r4 of the second limiting hole 22 and the radius r1 of the limiting portion 4b satisfy the condition: r4 > r1. In addition, to facilitate the removal of the protective film 2, an easy-tear line 23 is provided on the side of the protective film 2 near the spring clip 3.

[0025] Because the protective film 2 has multiple layers, if sand enters between the layers of the protective film 2 and adheres to other protective films 2 outside of each layer during the operation of the sandblasting machine, it will reduce the light transmittance of all the protective films 2. Even if the outermost protective film 2 is peeled off, it will still be impossible to observe the operation of the sandblasting machine through the observation window assembly. Therefore, the layers of protective film 2 are bonded together with an adhesive material. However, if the bonding is too tight, the multiple layers of protective film 2 will stick together and cannot be peeled off layer by layer. Therefore, in this embodiment, the layers of protective film 2 are bonded together with a low-tack material such as water or low-tack adhesive, thereby ensuring that the protective film 2 can be peeled off layer by layer.

[0026] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "inner," "outer," "upper," and "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A sandblaster comprising a housing and a viewing window assembly provided on the housing, characterized in that: The observation window component includes: An observation window body (1) is provided on the machine housing, allowing the operator to observe the working status of the sandblasting machine through the observation window body (1); A protective film (2) is provided on the inside of the observation window body (1) to protect the observation window body (1) from sand adhesion or erosion. The protective film (2) is stacked in at least two layers and can be peeled off layer by layer.

2. The sandblaster of claim 1, wherein: A spring clip (3) is provided on one side of the observation window body (1), and a limiting post (4) is provided on the other side. Correspondingly, a first limiting hole (21) is provided on the protective film (2) for the limiting post (4) to pass through and be limited. The side of the protective film (2) away from the first limiting hole (21) is clamped on the observation window body (1) by the spring clip (3).

3. The sandblaster of claim 2, wherein: The limiting post (4) includes a post (4a) and a limiting part (4b) located on the upper part of the post (4a). The radius r1 of the limiting part (4b), the radius r2 of the first limiting hole (21) and the radius r3 of the post (4a) satisfy the following condition: r1≥r2≥r3, thereby realizing that the limiting part (4b) limits the protective film (2) on the post (4a).

4. The sandblaster of claim 3, wherein: The protective film (2) is at least partially folded on the side adjacent to the first limiting hole (21) to form a folded portion (2a). A second limiting hole (22) is provided on the folded portion (2a). The radius r4 of the second limiting hole (22) and the radius r1 of the limiting portion (4b) satisfy: r4>r1. The protective film (2) located on the upper layer limits the folded portion of the protective film (2) located on the column (4a).

5. The sandblasting machine according to claim 2, characterized in that: The protective film (2) has an easy-tear line (23) on the side near the spring clip (3).

6. The sandblaster of claim 1, wherein: The observation window body (1) is also provided with at least two positioning posts (5) for positioning the protective film (2), and the protective film (2) is provided with corresponding positioning holes (24).

7. The sandblaster of claim 1, wherein: The protective films (2) in each layer are bonded together with a low-tack material.

8. The sandblaster of claim 1, wherein: The observation window assembly also includes a mounting component (6) for mounting the observation window body (1) inside the housing. A first sealing gasket (7) is provided between the observation window body (1) and the mounting component (6), and a second sealing gasket (8) is provided between the observation window body (1) and the housing.

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