Inner spraying mechanism for aluminum pipe

Abstract

The utility model discloses an aluminum pipe inner spraying mechanism which comprises a machine body, an indexing turntable, a plurality of rotating sleeves, a dust removal nozzle and two paint nozzles, the rotating sleeves are annularly and uniformly distributed around the center of the indexing turntable, and the nozzles are respectively opposite to three accommodating cavities and are respectively and sequentially distributed along the rotating direction of the indexing turntable; the nozzles are jointly arranged on an axial moving frame, and the axial moving frame moves in the axial direction of the containing cavity so as to control the dust removal nozzle and the paint nozzle to be inserted into the aluminum pipe in the containing cavity. The dedusting nozzle, the first paint nozzle and the second paint nozzle are arranged along the rotating direction of the indexing turntable, so that blowing and dedusting are performed on the inner cavity of the aluminum pipe firstly, then a first paint layer is sprayed on the inner cavity of the dedusted aluminum pipe, and finally a second paint layer is sprayed, on one hand, paint is well attached to the inner cavity wall of the aluminum pipe, and on the other hand, the paint is uniformly sprayed on the inner cavity wall of the aluminum pipe. And on the other hand, it is ensured that the inner cavity wall of the aluminum pipe is evenly coated with paint through two-time spraying superposition and complete covering.

Description

Technical Field

[0001] The utility model relates to an aluminum hose processing device for packaging, in particular to an aluminum hose internal spraying mechanism. Background Art

[0002] Combine Figure 7 As shown, a current internal spraying mechanism for aluminum tubes (aluminum hoses for packaging) includes a body (not shown), a graduated turntable 1, a paint nozzle 4, and multiple rotating sleeves 2. The graduated turntable is rotatably mounted on the body, and the multiple rotating sleeves are evenly distributed around the center of the graduated turntable and rotate in conjunction with the indexing turntable. A cavities 21 for inserting and placing aluminum tubes are located in the center of the rotating sleeves. A paint nozzle faces one of the cavities. The paint nozzles are mounted on an axially movable frame (not shown) that moves axially along the cavity to control the insertion of the paint nozzle into the aluminum tube within the cavity. The paint nozzle is provided with a tee connector 43, the three ports of which are connected to the paint nozzle, an air supply pipe 41, and a paint pipe 42, respectively. Because only one paint nozzle is used for internal spraying, oil and dirt easily accumulate on the paint nozzle during operation, affecting its spraying range and resulting in uneven spraying. In addition, the paint nozzle has only one paint tube to supply paint, and the paint enters the paint nozzle in a concentrated manner, where the mixing effect with the air is poor, resulting in uneven thickness of the spray layer. In addition, since the spraying is done in one go, the spraying time is longer to meet the requirements for the thickness of the spray layer.

[0003] Furthermore, aluminum tubes are typically sprayed internally and externally based on order requirements (given that internal and external spraying are completed within the same facility), while the forming process can be independent. Therefore, workshops often pre-process a portion of the tubes and then move them to the internal spraying facility for processing when an order arrives. During storage, dust inevitably accumulates, hindering subsequent painting, and current equipment does not address this dust removal issue. Utility Model Content

[0004] The utility model aims to provide an aluminum tube internal spraying mechanism with simple and reasonable structure, uniform paint thickness and complete coverage of the inner wall of the aluminum tube by paint.

[0005] The purpose of this utility model is achieved in this way:

[0006] A spraying mechanism inside an aluminum tube comprises a body, a dividing turntable and a plurality of rotating sleeves, wherein the dividing turntable is rotatably arranged on the body, the plurality of rotating sleeves are evenly distributed in a ring around the center of the dividing turntable and are respectively rotatably cooperated with the dividing turntable, a receiving cavity for inserting the aluminum tube is provided at the center of the rotating sleeve, and the mechanism further comprises a dust removal nozzle and two paint nozzles, wherein the dust removal nozzle and the two paint nozzles are respectively opposite to the three receiving cavities and are respectively arranged in sequence along the rotation direction of the dividing turntable, the dust removal nozzle and the paint nozzle are jointly arranged on an axially movable frame, and the axially movable frame moves along the axial direction of the receiving cavity to control the dust removal nozzle and the paint nozzle to be inserted into the aluminum tube in the receiving cavity.

[0007] The purpose of the utility model can also be solved by the following technical measures:

[0008] As a more specific solution, the paint nozzle is equipped with a four-way joint. The four ports of the four-way joint are connected to the paint nozzle, the air supply pipe, and two paint pipes. Compared with the existing technology, the same amount of paint can be supplied through two paint pipes, which allows the paint to be initially dispersed, allowing it to be more thoroughly mixed with the high-pressure air and dispersed into the aluminum tube to form the inner coating.

[0009] As a further solution, the three accommodating cavities respectively opposite to the dust removal nozzle and the two paint nozzles are arranged adjacent to each other in sequence, N rotating sleeves are provided, and the angle of each rotation of the dividing turntable is 360 / N degrees.

[0010] As a further solution, a tube loading device is further included, comprising a feed channel for placing aluminum tubes and a push rod for pushing the aluminum tubes into the accommodating chamber. The feed channel is tilted, with its lower end located outside the accommodating chamber behind the dust removal nozzle. Both sides of the lower end of the feed channel are open and respectively opposite the opening of the accommodating chamber and the push rod. The push rod is in transmission connection with the axial movable frame. The push rod, dust removal nozzle, and paint nozzle are all uniformly driven by the axial movable frame. During normal production, the push rod pushes an aluminum tube into the accommodating chamber, and the dust removal nozzle, first paint nozzle, and second paint nozzle respectively remove dust, apply a first layer of paint, and apply a second layer of paint to the three previously loaded aluminum tubes, thereby achieving continuous production.

[0011] As a further solution, it also includes a pipe unloading device, which includes a discharge channel and a push rod. The discharge channel is arranged at an angle, and the upper end of the discharge channel is located outside the accommodating cavity in front of the paint nozzle. The discharge channel is open on one side corresponding to the accommodating cavity and is opposite to the opening of the accommodating cavity; the inner end of the rotating sleeve is provided with an opening corresponding to the nozzle of the aluminum tube, the push rod is opposite to the opening and is connected to the cylinder for transmission, and the cylinder controls the movement of the push rod to push the aluminum tube in the accommodating cavity into the discharge channel.

[0012] As a further solution, the machine body is provided with a base located in the middle of the indexing turntable, the axially movable frame is mounted on the base, and the base is also provided with an oil receiving groove below the paint nozzle. After the paint nozzle has been operating for a period of time, paint will drip. The oil receiving groove can collect the dripping paint from the nozzle, thereby reducing equipment contamination.

[0013] As a further solution, the air supply pipe is supplied simultaneously by at least two air compressors. Because aluminum tube processing workshops involve multiple pieces of equipment, a unified layout of air supply pipes (air sources) is generally adopted. Conventional layouts use one air compressor to supply air, but this improvement has been made to use two air compressors, each located at a corner of the workshop. This prevents insufficient pressure caused by aluminum tube processing equipment being too far from the air source release point.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model is provided with a dust removal nozzle, a first paint nozzle and a second paint nozzle arranged along the rotation direction of the indexing turntable, so that the inner cavity of the aluminum tube is first blown to remove dust, and then a first layer of paint is sprayed on the inner cavity of the aluminum tube after dust removal, and finally a second layer of paint is sprayed. On the one hand, the paint is well adhered to the inner cavity wall of the aluminum tube, and on the other hand, the time of a single spraying can be shortened. By superimposing and fully covering the two spraying operations, it is ensured that the inner cavity wall of the aluminum tube is painted everywhere, thereby improving the quality of the aluminum tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the dust removal nozzle structure in this utility model.

[0018] Figure 3 This is a schematic diagram of the paint nozzle structure of the utility model.

[0019] Figure 4 This is a schematic diagram of the structure after adding an oil receiving tank and a supporting platform to the utility model.

[0020] Figure 5 This is a schematic diagram of the back structure of the middle indexing turntable of the utility model.

[0021] Figure 6 This is a schematic diagram of the gas supply circuit in the utility model.

[0022] Figure 7 It is a schematic diagram of the prior art structure. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] See also Figures 1 to 6 As shown, a spraying mechanism inside an aluminum tube includes a body (not shown in the figure), a dividing turntable 1 and a plurality of rotating sleeves 2. The dividing turntable 1 is rotatably arranged on the body. The plurality of rotating sleeves 2 are evenly distributed around the center ring of the dividing turntable 1 and are respectively rotatably cooperated with the dividing turntable 1. The center of the rotating sleeve 2 is provided with an accommodating cavity 21 for inserting the aluminum tube 10; it also includes a dust removal nozzle 3 and two paint nozzles 4. The dust removal nozzle 3 and the two paint nozzles 4 are respectively opposite to the three accommodating cavities 21 and are respectively arranged in sequence along the rotation direction of the dividing turntable 1. The dust removal nozzle 3 and the paint nozzle 4 are jointly arranged on an axially movable frame (not shown in the figure). The axially movable frame moves along the axial direction of the accommodating cavity 21 to control the dust removal nozzle 3 and the paint nozzle 4 to be inserted into the aluminum tube 10 in the accommodating cavity 21.

[0025] The structure of the indexing turntable 1 and the plurality of rotating sleeves 2 is the prior art. Figure 5 To describe briefly, a central shaft 11 is provided at the center of the indexing turntable 1, and the central shaft 11 is transmission-connected to the turntable drive motor, which is not shown in the figure; a hollow shaft 12 is provided outside the central shaft 11, and the hollow shaft 12 rotates relative to the central shaft 11, and the hollow shaft 12 is transmission-connected to the sleeve drive motor (not shown in the figure), and a transmission tooth surface 23 is provided on the outer periphery of the inner end of the rotating sleeve 2 (the end located on the back of the indexing turntable 1), and the transmission tooth surface 23 is transmission-connected to the drive tooth surface on the outer periphery of the hollow shaft 12 through a transmission gear 13.

[0026] The paint nozzle 4 is provided with a four-way joint 43, and the four ports of the four-way joint 43 are respectively connected to the paint nozzle 4, the air supply pipe 31 and the two paint pipes 42. The air supply pipe 31 and the paint pipe 42 are respectively provided with an air valve 33 and an oil valve, which are opened when spraying is required.

[0027] The dust removal nozzle 3 is provided with a two-way joint 32, and the two ports of the two-way joint 32 are respectively connected to the dust removal nozzle 3 and the air supply pipe 31. When dust removal is required, the air valve 33 is opened.

[0028] The three accommodating cavities 21 respectively facing the dust removal nozzle 3 and the two paint nozzles 4 are arranged adjacent to each other. The rotating sleeve 2 is provided with N cavities. The angle of each rotation of the indexing turntable 1 is 360 / N degrees. In this embodiment, N is twelve.

[0029] It also includes a tube loading device, which includes a feed channel 5 for placing the aluminum tube 10 and a push rod 7 for pushing the aluminum tube 10 into the accommodating chamber 21. The feed channel 5 is arranged at an angle, and the lower end of the feed channel 5 is located outside the accommodating chamber 21 behind the dust removal nozzle 3. The lower end of the feed channel 5 is open on both sides and is respectively opposite to the opening of the accommodating chamber 21 and the push rod 7; the push rod 7 is transmission-connected to the axial movable frame.

[0030] It also includes a pipe unloading device, which includes a discharge channel 6 and a push rod (not shown in the figure). The discharge channel 6 is arranged at an angle, and the upper end of the discharge channel 6 is located outside the accommodating cavity 21 in front of the paint nozzle 4. The discharge channel 6 is open on one side corresponding to the accommodating cavity 21 and is opposite to the opening of the accommodating cavity 21; the inner end of the rotating sleeve 2 is provided with an opening 22 corresponding to the nozzle of the aluminum tube 10, and the push rod is opposite to the opening 22 and is connected to the cylinder for transmission. The cylinder controls the movement of the push rod to push the aluminum tube 10 in the accommodating cavity 21 into the discharge channel 6.

[0031] The machine body is provided with a support platform 8, which is located in the middle of the indexing turntable 1. The axial movable frame is provided on the support platform 8. The support platform 8 is also provided with an oil receiving groove 81 below the paint nozzle 4. The axial movable frame is axially slidably provided on the support platform and is driven by a cylinder, which is not shown in the figure.

[0032] The air supply pipe 31 is supplied by two air compressors. These are a first air compressor 91 and a second air compressor 92. The air outlet of the first air compressor 91 is connected to one end of a main air pipe 95 via a first filter 93. The air outlet of the second air compressor 92 is connected to the other end of the main air pipe 95 via a second filter 94. Several branch air pipes 96 are provided on the main air pipe 95. Each branch air pipe 96 is connected to its corresponding air supply pipe 31 via an air tank 97 and the air valve 33.

[0033] Its working principle is: combining Figure 1 As shown, the aluminum tube 10 is placed on the feed channel 5, and the aluminum tube 10 rolls down to the lower end of the feed channel 5 along the direction of arrow A. The axial moving frame drives the push rod 7 to push the aluminum tube 10 at the lower end of the feed channel 5 along the direction of arrow B into the accommodating cavity 21 of a rotating sleeve 2. The state of the aluminum tube 10 being installed in the rotating sleeve 2 is shown in FIG. Figure 1 As shown at E in the middle, it is then reset; the indexing turntable 1 rotates grid by grid along the direction of the arrow R1 (in this embodiment, the central axis of the indexing turntable 1 rotates 30 degrees each time), so that the accommodating cavity 21 of the next rotating sleeve 2 is aligned with the lower end of the feed channel 5, so that the next aluminum tube 10 can be loaded.

[0034] When the mechanism is first activated, it fails to operate normally because some of the accommodating cavities 21 are not loaded with aluminum tubes. Once the first aluminum tube has completed dust removal and the first coat of paint and enters the second paint nozzle area, the painting process begins. Once the first aluminum tube has completed two coats of paint and reaches the corresponding position at the upper end of the discharge channel 6, the entire mechanism operates normally. The axially movable frame simultaneously drives the push rod 7, the dust removal nozzle 3, and the two paint nozzles 4 forward in the direction of arrow B, pushing in an aluminum tube 10, dusting each aluminum tube, spraying a first coat of paint on a dust-removed aluminum tube, and spraying a second coat of paint on a coated aluminum tube. Simultaneously, the push rod moves in the direction of arrow C, ejecting an aluminum tube F that has completed two coats of paint. This aluminum tube F finally enters the baking process in the direction of arrow D. As the indexing turntable rotates, the rotating sleeve 2 rotates rapidly in the direction of arrow R2.

[0035] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. 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 are intended to fall within the scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. A spray coating mechanism for an aluminum tube, comprising a body, a dividing turntable (1) and a plurality of rotating sleeves (2), wherein the dividing turntable (1) is rotatably mounted on the body, the plurality of rotating sleeves (2) are uniformly distributed in a ring around the center of the dividing turntable (1) and are respectively rotatably engaged with the dividing turntable (1), and a receiving cavity (21) for inserting and placing the aluminum tube (10) is provided at the center of the rotating sleeve (2), characterized in that: The apparatus further comprises a dust removal nozzle (3) and two paint nozzles (4), wherein the dust removal nozzle (3) and the paint nozzles (4) are respectively opposite to the three accommodating chambers (21) and are respectively arranged in sequence along the rotation direction of the indexing turntable (1), and the dust removal nozzle (3) and the paint nozzle (4) are jointly arranged on an axial movable frame, and the axial movable frame moves along the axial direction of the accommodating chamber (21) to control the dust removal nozzle (3) and the paint nozzle (4) to be inserted into the aluminum tube (10) in the accommodating chamber (21).

2. The aluminum tube internal spraying mechanism according to claim 1, characterized in that: The paint nozzle (4) is provided with a four-way joint (43), and the four ports of the four-way joint (43) are respectively connected to the paint nozzle (4), the air supply pipe (41) and the two paint pipes (42).

3. The aluminum tube internal spraying mechanism according to claim 1, characterized in that: The three accommodating cavities (21) respectively corresponding to the dust removal nozzle (3) and the two paint nozzles (4) are arranged adjacent to each other in sequence, the rotating sleeve (2) is provided with N pieces, and the angle of each rotation of the indexing turntable (1) is 360 / N degrees.

4. The aluminum tube internal spraying mechanism according to claim 1, characterized in that: The apparatus further comprises a tube loading device, comprising a feed channel (5) for placing the aluminum tube (10) and a push rod (7) for pushing the aluminum tube (10) into the accommodating chamber (21). The feed channel (5) is arranged obliquely, and the lower end of the feed channel (5) is located outside the accommodating chamber (21) behind the dust removal nozzle (3). Both sides of the lower end of the feed channel (5) are open and respectively face the opening of the accommodating chamber (21) and the push rod (7); the push rod (7) is transmission-connected to the axial movable frame.

5. The aluminum tube internal spraying mechanism according to claim 1, characterized in that: The invention also includes a tube unloading device, which includes a discharge channel (6) and a push rod. The discharge channel (6) is arranged obliquely, and the upper end of the discharge channel (6) is located outside the accommodating chamber (21) in front of the paint nozzle (4). The discharge channel (6) is open on one side corresponding to the accommodating chamber (21) and is opposite to the opening of the accommodating chamber (21); the inner end of the rotating sleeve (2) is provided with an opening (22) corresponding to the nozzle of the aluminum tube (10), the push rod is opposite to the opening (22) and is connected to the cylinder for transmission. The cylinder controls the movement of the push rod to push the aluminum tube (10) in the accommodating chamber (21) into the discharge channel (6).

6. The aluminum tube internal spraying mechanism according to claim 1, characterized in that: A support platform (8) is provided on the machine body, and the support platform (8) is located in the middle of the indexing turntable (1). The axial movable frame is arranged on the support platform (8). The support platform (8) is also provided with an oil receiving groove (81) below the paint nozzle (4).

7. The aluminum tube internal spraying mechanism according to claim 2, characterized in that: The air source of the air supply pipe (41) is supplied simultaneously by at least two air compressors.

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