Rotary joint for hot melt glue machine

Abstract

The utility model belongs to the technical field of rotary joints, and particularly relates to a rotary joint for a hot melt glue machine, which comprises a joint body, a glue outlet pipe is connected to the outer wall of the top side of one end of the joint body, a mounting cavity is connected to the outer wall of the bottom side of one end of the joint body, and a telescopic rod is mounted in the mounting cavity in a penetrating manner. A rod hole is formed in the top end of the telescopic rod, an acting rod is assembled at the acting end of the telescopic rod, the top end of the acting rod movably penetrates through the rod hole and is fixedly connected with a piston block, a circular groove is formed in the acting rod and penetrates through the piston block, and an electric heating wire is assembled in the circular groove. When glue is discharged, the actuating rod is pushed to move upwards, the piston block enters the glue outlet pipe, meanwhile, the electric heating wire heats to soften residual hot melt glue, and the piston block moves upwards to push the softened hot melt glue out of the glue outlet pipe, so that automatic cleaning of the interior of the discharging pipe is achieved, and glue discharging smoothness and precision are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joints, in particular to a rotary joint for a hot melt adhesive machine. Background Technique

[0002] A hot melt adhesive machine is a device that heats and melts solid hot melt adhesive and transports and sprays the hot melt adhesive through a certain pressure and method. In order to complete the large-area glue application work in a short time during the operation of the hot melt adhesive machine, a rotary joint needs to be used.

[0003] A Chinese patent with the authorization announcement number CN214052315U discloses a rotary joint for a hot melt adhesive machine, which includes a glue inlet cylinder. On the inner cylinder wall of the glue inlet cylinder, first sliding grooves are symmetrically opened. On the groove bottom of the first sliding groove far away from the spray gun, clamping holes are opened. In the first sliding grooves, first sliders are slidably connected. The opposite ends of the first sliders both pass through the notch of the corresponding first sliding groove and extend outwards, and are commonly fixedly connected with a limiting ring. Inside the limiting ring, a glue inlet pipe is rotatably connected through a bearing, and the upper end of the glue inlet pipe extends into the glue inlet cylinder. The rotary joint of the utility model enables the glue inlet pipe not to be damaged, and at the same time can prevent the situation that the rotary joint is blocked due to the residue of hot melt adhesive.

[0004] However, there are still some problems with the above-mentioned rotary joint. In actual application, with the continuous use and transportation of hot melt adhesive, if it cannot be cleaned in time, some cured substances will gradually accumulate in the discharge pipe, eventually causing the discharge pipe to be blocked, which will seriously affect the normal transportation of hot melt adhesive, resulting in production interruption and reducing production efficiency. Therefore, a rotary joint for a hot melt adhesive machine is proposed for the above problems. Summary of the Utility Model

[0005] In order to make up for the deficiencies of the prior art and solve the problems proposed in the background technique, the utility model proposes a rotary joint for a hot melt adhesive machine.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: A rotary joint for a hot melt adhesive machine according to the utility model includes a joint body. On the top side outer wall of one end of the joint body, a glue outlet pipe is connected. On the bottom side outer wall of one end of the joint body, an installation cavity is connected. Inside the installation cavity, a cleaning component is installed. The cleaning component includes a telescopic rod. The telescopic rod is installed inside the installation cavity through penetration. The acting end of the telescopic rod is equipped with an acting rod. A rod hole is opened between the joint body and the installation cavity. The top end of the acting rod movably penetrates the rod hole and is fixedly connected with a piston block. The radius of the piston block is less than or equal to the inner diameter of the glue outlet pipe. A circular groove is opened through the piston block inside the acting rod. Inside the circular groove, an electric heating wire is installed, which can effectively soften and remove the residual hot melt adhesive, realizing the automatic cleaning of the inside of the discharge pipe and ensuring the smoothness and accuracy of glue outlet.

[0007] Preferably, a switch is installed on the bottom side of the telescopic rod, and a rubber sleeve is assembled outside the switch. A battery is assembled on the outer wall of the installation cavity. The battery is used to meet the power supply requirements of the telescopic rod and the heating wire, and the rubber sleeve prevents the risk of electric shock.

[0008] Preferably, a glue inlet is provided on one side of the joint body, and a threaded groove is provided at one end of the joint body outside the glue inlet. The threaded groove is used to connect with the discharge end of the hot melt adhesive machine, ensuring the stability and tightness of the hot melt adhesive during transmission, and avoiding leakage and waste of the hot melt adhesive.

[0009] Preferably, a rotating shaft is installed through the middle position of the joint body in a movable manner. A baffle is installed on the outer wall of the middle end of the rotating shaft through spline fit. The baffle is located inside the joint body. A knob is installed at the bottom end of the rotating shaft. A spring is fixedly connected between the knob and the joint body. The spring is sleeved on the outer wall of the rotating shaft. An indicating needle is installed at the top end of the rotating shaft, realizing the change of the flow rate of the hot melt adhesive and meeting the requirements in different application scenarios.

[0010] Preferably, an installation ring is installed on the top outer wall of the joint body. A plurality of card slots are equidistantly provided inside the installation ring. A disc is installed on the outer wall of the top end of the rotating shaft. A plurality of clamping blocks are equidistantly installed on the outer wall of the disc. The clamping blocks are clamped inside the card slots, realizing the limiting and locking functions of the rotating shaft and the baffle, and ensuring the stability and consistency of the glue application process.

[0011] Preferably, the controller of the hot melt adhesive machine is electrically connected to the heating wire, the telescopic rod and the switch, and is used for signal transmission to the switch and operation control of the heating wire and the telescopic rod, improving the automation degree and working efficiency of the equipment.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. When it is necessary to clean the residual hot melt adhesive in the glue outlet pipe in the present utility model, the battery supplies power to the telescopic rod and the heating wire. The telescopic rod extends, pushing the actuating rod upward, so that the piston block enters the glue outlet pipe. At the same time, the heating wire generates heat to soften the residual hot melt adhesive. The upward movement of the piston block pushes the softened hot melt adhesive out of the glue outlet pipe, thereby realizing the automatic cleaning of the inside of the discharge pipe and ensuring the smoothness and accuracy of glue discharge.

[0014] 2. When the user pushes the knob of the present utility model upward, the spring is compressed. With the cooperation of the spline, the rotating shaft moves upward. At this time, the baffle remains stationary inside the joint body, and the clamping block disengages from the clamping groove. Then, the knob is rotated to drive the rotating shaft and the baffle to rotate. With the cooperation of the indicating needle, the relative angle between the baffle and the internal channel of the joint body is changed, thereby achieving the change of the flow rate of the hot melt adhesive to meet the requirements of different application scenarios. After adjusting the flow rate, the knob is released, and the spring rebounds, causing the clamping block to snap back into the clamping groove, realizing the limiting and locking functions of the rotating shaft and the baffle, and ensuring the stability and consistency of the gluing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Isometric perspective structural schematic diagram of the present utility model;

[0017] Figure 2 Is structural schematic diagram of the rotary joint main body;

[0018] Figure 3 Is bottom view structural schematic diagram of the rotary joint main body;

[0019] Figure 4 Is structural schematic diagram of the cleaning component;

[0020] Figure 5 Is structural schematic diagram of the flow rate control component.

[0021] In the figure: 1, joint body; 2, glue outlet pipe; 3, installation cavity; 4, telescopic rod; 5, acting rod; 6, piston block; 7, circular groove; 8, heating wire; 9, switch; 10, rubber sleeve; 11, battery; 12, glue inlet; 13, thread groove; 14, rotating shaft; 15, baffle; 16, knob; 17, spring; 18, indicating needle; 19, mounting ring; 20, clamping groove; 21, disc; 22, clamping block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0023] Please refer to Figures 1-4 As shown, a rotary joint for a hot melt adhesive machine includes a joint body 1. One end of the top side outer wall of the joint body 1 is connected with a glue outlet pipe 2. One end of the bottom side outer wall of the joint body 1 is connected with an installation cavity 3. A cleaning component is installed inside the installation cavity 3. The cleaning component includes a telescopic rod 4. The telescopic rod 4 is installed through the inside of the installation cavity 3. The acting end of the telescopic rod 4 is equipped with an acting rod 5. A rod hole is opened between the joint body 1 and the installation cavity 3. The top end of the acting rod 5 movably penetrates through the rod hole and is fixedly connected with a piston block 6. The radius of the piston block 6 is less than or equal to the inner diameter of the glue outlet pipe 2. A circular groove 7 is opened through the piston block 6 inside the acting rod 5. An electric heating wire 8 is installed inside the circular groove 7. A switch 9 is installed on the bottom side of the telescopic rod 4. A rubber sleeve 10 is installed on the outside of the switch 9. A battery 11 is installed on the outer wall of the installation cavity 3. The battery 11 is used to meet the power supply requirements of the telescopic rod 4 and the electric heating wire 8. The controller of the hot melt adhesive machine is electrically connected to the electric heating wire 8, the telescopic rod 4 and the switch 9; during operation, in practical applications, with the continuous use and transportation of the hot melt adhesive, if it cannot be cleaned in time, some cured substances will gradually accumulate in the glue outlet pipe 2, eventually causing the discharge pipe to be blocked, which will seriously affect the normal transportation of the hot melt adhesive, resulting in production interruption and reducing production efficiency. When it is necessary to clean the residual hot melt adhesive in the glue outlet pipe 2, the controller of the hot melt adhesive machine sends a signal, the battery 11 supplies power to the telescopic rod 4 and the electric heating wire 8, the telescopic rod 4 extends, pushing the acting rod 5 to move upward, so that the piston block 6 enters the glue outlet pipe 2. At the same time, the electric heating wire 8 generates heat, softening the residual hot melt adhesive. The upward movement of the piston block 6 pushes the softened hot melt adhesive out of the glue outlet pipe 2, thus realizing the automatic cleaning of the inside of the discharge pipe and ensuring the smoothness and accuracy of glue output.

[0024] Please refer to Figure 1 、 2 As shown in Figures 3 and 5, an inlet 12 is opened on one side of the joint body 1. A threaded groove 13 is opened at one end of the outer side of the joint body 1 where the inlet 12 is located. The threaded groove 13 is used to connect with the discharge end of the hot melt adhesive machine;

[0025] A rotating shaft 14 is movably installed through the middle position of the joint body 1. A baffle 15 is installed on the outer wall of the middle end of the rotating shaft 14 by spline fit. The baffle 15 is located inside the joint body 1. A knob 16 is installed at the bottom end of the rotating shaft 14. A spring 17 is fixedly connected between the knob 16 and the joint body 1. The spring 17 is sleeved on the outer wall of the rotating shaft 14. An indicating needle 18 is installed at the top end of the rotating shaft 14. An installation ring 19 is installed on the outer wall of the top side of the joint body 1. A plurality of card slots 20 are equidistantly opened inside the installation ring 19. A disc 21 is installed on the outer wall of the top end of the rotating shaft 14. A plurality of clamping blocks 22 are equidistantly installed on the outer wall of the disc 21. The clamping blocks 22 are clamped inside the card slots 20. During operation, in order to complete the large-area glue application work in a short time during the operation of the hot melt adhesive machine, a rotating joint needs to be used. During use, the discharge end of the hot melt adhesive machine is threadedly connected to the threaded groove 13. The hot melt adhesive enters the joint body 1 from the glue inlet 12. When adjusting the flow rate of the hot melt adhesive, the knob 16 is pushed upward to compress the spring 17. Under the cooperation of the splines, the rotating shaft 14 moves upward. At this time, the baffle 15 remains stationary inside the joint body 1, and the clamping blocks 22 are disengaged from the card slots 20. Then the knob 16 is rotated to drive the rotating shaft 14 and the baffle 15 to rotate. Under the cooperation of the indicating needle 18, the relative angle between the baffle 15 and the internal channel of the joint body 1 is changed, so as to change the flow rate of the hot melt adhesive to meet the requirements of different application scenarios. After adjusting the flow rate, the knob 16 is released, and the spring 17 rebounds to make the clamping blocks 22 re-enter the card slots 20, realizing the limiting and locking functions of the rotating shaft 14 and the baffle 15, and ensuring the stability and consistency of the glue application process.

[0026] Working principle: During use, the discharge end of the hot melt adhesive machine is threadedly connected to the threaded groove 13. The hot melt adhesive enters the joint body 1 from the glue inlet 12. When adjusting the flow rate of the hot melt adhesive, the knob 16 is pushed upward to compress the spring 17. Under the cooperation of the splines, the rotating shaft 14 moves upward. At this time, the baffle 15 remains stationary inside the joint body 1, and the clamping blocks 22 are disengaged from the card slots 20. Then the knob 16 is rotated to drive the rotating shaft 14 and the baffle 15 to rotate. Under the cooperation of the indicating needle 18, the relative angle between the baffle 15 and the internal channel of the joint body 1 is changed, so as to change the flow rate of the hot melt adhesive to meet the requirements of different application scenarios. After adjusting the flow rate, the knob 16 is released, and the spring 17 rebounds to make the clamping blocks 22 re-enter the card slots 20, realizing the limiting and locking functions of the rotating shaft 14 and the baffle 15, and ensuring the stability and consistency of the glue application process;

[0027] When it is necessary to clean the residual hot-melt adhesive in the glue outlet pipe 2, the controller of the hot-melt adhesive machine sends a signal, and the battery 11 supplies power to the telescopic rod 4 and the heating wire 8. The telescopic rod 4 extends, pushing the acting rod 5 to move upward, so that the piston block 6 enters the glue outlet pipe 2. At the same time, the heating wire 8 generates heat to soften the residual hot-melt adhesive. The upward movement of the piston block 6 pushes the softened hot-melt adhesive out of the glue outlet pipe 2, thereby realizing the automatic cleaning of the inside of the discharge pipe and ensuring the smoothness and accuracy of glue outlet.

[0028] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A rotary joint for a hot melt adhesive machine, characterized in that: It includes a joint body (1). On the outer wall of the top side of one end of the joint body (1), a glue outlet pipe (2) is connected. On the outer wall of the bottom side of one end of the joint body (1), an installation cavity (3) is connected. A cleaning component is installed inside the installation cavity (3). The cleaning component includes a telescopic rod (4). The telescopic rod (4) is installed through the inside of the installation cavity (3). The acting end of the telescopic rod (4) is equipped with an acting rod (5). A rod hole is provided between the joint body (1) and the installation cavity (3). The top end of the acting rod (5) movably penetrates through the rod hole and is fixedly connected with a piston block (6). The radius of the piston block (6) is less than or equal to the inner diameter of the glue outlet pipe (2). A circular groove (7) is provided through the piston block (6) inside the acting rod (5). An electric heating wire (8) is installed inside the circular groove (7).

2. The rotary joint for a hot melt adhesive machine according to claim 1, wherein: A switch (9) is installed on the bottom side of the telescopic rod (4). A rubber sleeve (10) is installed on the outside of the switch (9). A battery (11) is installed on the outer wall of the installation cavity (3). The battery (11) is used to meet the power supply requirements of the telescopic rod (4) and the electric heating wire (8).

3. The rotary joint for a hot melt adhesive machine according to claim 2, characterized in that: A glue inlet (12) is provided on one side of the joint body (1). A thread groove (13) is provided at one end of the outer side of the joint body (1) where the glue inlet (12) is located. The thread groove (13) is used to connect with the discharge end of the hot melt adhesive machine.

4. The rotary joint for a hot melt adhesive machine according to claim 3, characterized in that: A rotating shaft (14) is movably installed through the middle position of the joint body (1). A baffle (15) is installed on the outer wall of the middle end of the rotating shaft (14) by spline fit. The baffle (15) is located inside the joint body (1). A knob (16) is installed at the bottom end of the rotating shaft (14). A spring (17) is fixedly connected between the knob (16) and the joint body (1). The spring (17) is sleeved on the outer wall of the rotating shaft (14). An indicating needle (18) is installed at the top end of the rotating shaft (14).

5. The rotating joint for a hot melt adhesive machine according to claim 4, wherein: An installation ring (19) is installed on the outer wall of the top side of the joint body (1). A number of card slots (20) are equidistantly provided inside the installation ring (19). A disc (21) is installed on the outer wall of the top end of the rotating shaft (14). A number of clamping blocks (22) are equidistantly installed on the outer wall of the disc (21). The clamping blocks (22) are clamped inside the card slots (20).

6. The rotary joint for a hot melt adhesive machine according to claim 5, wherein: The controller of the hot melt adhesive machine is electrically connected to the electric heating wire (8), the telescopic rod (4), and the switch (9), which is used for signal transmission to the switch (9) and operation control of the electric heating wire (8) and the telescopic rod (4).

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