Glue injection device using air cylinder to control injection pressure

Abstract

The utility model provides a glue injection device using an air cylinder to control injection pressure, which comprises a cylinder barrel and a driving air cylinder, the cylinder barrel is provided with a feed port and a discharge port, the feed port and the discharge port are arranged on the same side of the cylinder barrel, an output rod of the driving air cylinder moves up and down along the cylinder barrel, and the output rod is fixedly provided with a piston abutted against the inner wall of the cylinder barrel; when the feeding port is opened and the discharging port is closed, the piston moves towards the side far away from the feeding port, and materials are guided into the cylinder barrel along the feeding port; when the feeding port is closed and the discharging port is opened, the piston moves towards one side of the feeding port and guides out materials in the cylinder barrel along the discharging port; the control device is used for controlling the air inlet pressure of the driving air cylinder and finally controlling the flow speed and flow of materials passing through the discharging port, the pneumatic control mode is adopted for material injection, and compared with a hydraulic control mode or an electric control mode in the market, the pneumatic control mode is simple in structure, few in accessories, low in cost, convenient to maintain in the later period, easy to operate and high in practicability. And large-scale production can be carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of glue injection devices, in particular to a glue injection device which uses a cylinder to control the injection pressure. Background Art

[0002] At present, the glue output control of injection in the market generally adopts two methods: hydraulic control or electric control. Although these two control methods can obtain greater thrust and glue amount accuracy, the defects of the hydraulic control method are as follows: the hydraulic control method may leak hydraulic oil, and the leakage of hydraulic oil will inevitably bring about the risk of pollution.

[0003] Although the electronic control method avoids the risk of hydraulic oil leakage in the hydraulic control method, its high manufacturing cost is an important factor that prevents it from being put into mass production. In addition, for small amounts of glue, the structure is too large and the system is too complicated, which is not conducive to the use and after-sales maintenance of on-site operators. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a glue injection device that uses a cylinder to control the injection pressure to solve the problems mentioned in the above background technology section.

[0005] The utility model is realized by the following technical solutions:

[0006] A glue injection device that uses a cylinder to control injection pressure, comprises a cylinder and a driving cylinder, the cylinder being provided with a feed port and a discharge port, the feed port and the discharge port being arranged on the same side of the cylinder, an output rod of the driving cylinder being lifted and lowered along the cylinder, the output rod being fixed with a piston that abuts against the inner wall of the cylinder; when the feed port is opened and the discharge port is closed, the piston moves toward a side away from the feed port and introduces the material into the cylinder along the feed port; when the feed port is closed and the discharge port is opened, the piston moves toward a side of the feed port and guides the material in the cylinder along the discharge port; and also comprises a control device, the control device being used to control the intake pressure of the driving cylinder and ultimately control the flow rate and flow rate of the material through the discharge port.

[0007] Furthermore, the control device includes a pressure transmitter and a proportional valve, the pressure transmitter is arranged at the discharge port, and the proportional valve is arranged at the top of the driving cylinder. The pressure transmitter feeds back the sensed pressure change to the proportional valve, and the intake pressure of the driving cylinder is adjusted through the proportional valve.

[0008] Furthermore, the driving cylinder is provided with an exhaust hole and a pressure gauge, and when the pressure of the driving cylinder exceeds a set threshold of the pressure gauge, the pressure is released through the exhaust hole.

[0009] Furthermore, it also includes a mounting frame, which includes a plurality of spaced columns and a mounting plate connected to the columns, the cylinder barrel is fixedly arranged below the mounting plate, a plurality of spaced mounting columns are provided above the mounting plate, and the driving cylinder is fixedly arranged on the mounting columns.

[0010] Furthermore, the cylinder barrel and the mounting plate are detachably connected via bolts.

[0011] Furthermore, one end of the piston extends out of the cylinder barrel and is detachably connected to the output rod of the driving cylinder via a threaded structure.

[0012] The beneficial effects of the utility model are as follows: a glue injection device that uses a cylinder to control the injection pressure comprises a cylinder barrel and a driving cylinder, the cylinder barrel is provided with a feed port and a discharge port, the feed port and the discharge port are arranged on the same side of the cylinder barrel, the output rod of the driving cylinder moves up and down along the cylinder barrel, and the output rod is fixed with a piston that abuts against the inner wall of the cylinder barrel; when the feed port is opened and the discharge port is closed, the piston moves toward a side away from the feed port and introduces the material into the cylinder barrel along the feed port; when the feed port is closed and the discharge port is opened, the piston moves toward a side away from the feed port and introduces the material into the cylinder barrel along the feed port; when the feed port is closed and the discharge port is opened, the piston moves toward a side away from the feed port and introduces the material into the cylinder barrel along the feed port. It moves toward one side of the feed port and guides the material in the cylinder barrel out along the discharge port; it also includes a control device, which is used to control the air intake pressure of the driving cylinder and ultimately control the flow rate and flow of the material through the discharge port. The utility model adopts an air control method for injection. Compared with the hydraulic control method, the air control method is clean and simple as a whole. There is no need to worry about the risk of pollution to the environment or the product caused by hydraulic oil leakage. Compared with the electric control method, the air control method has an overall low cost and is suitable for large-scale production. The control method is simple and there are no too many complicated control circuits and logic programs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model.

[0014] Figure 2 It is a front view of the utility model.

[0015] Figure 3 It is a side view of the utility model.

[0016] The above drawings include the following reference numerals:

[0017] 1. Cylinder barrel; 11. Feed inlet; 12. Discharge outlet; 2. Driving cylinder; 21. Output rod; 22. Exhaust hole; 3. Piston; 4. Pressure transmitter; 5. Proportional valve; 6. Pressure gauge; 7. Mounting frame; 71. Column; 72. Mounting plate; 73. Mounting column; 74. Support plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0019] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0020] Reference Figures 1 to 3 As shown, a glue injection device that uses a cylinder to control the injection pressure includes a cylinder 1 and a driving cylinder 2, the cylinder 1 is provided with a feed port 11 and a discharge port 12, the feed port 11 and the discharge port 12 are arranged on the same side of the cylinder 1, the output rod 21 of the driving cylinder 2 moves up and down along the cylinder 1, and the output rod 21 is fixed with a piston 3 that abuts against the inner wall of the cylinder 1; when the feed port 11 is opened and the discharge port 12 is closed, the piston 3 moves toward the side away from the feed port 11 and introduces the material into the cylinder 1 along the feed port 11; when the feed port 11 is closed and the discharge port 12 is opened, the piston 3 moves toward the side of the feed port 11 and guides the material in the cylinder 1 along the discharge port 12; and also includes a control device, the control device is used to control the intake pressure of the driving cylinder 2, and finally control the flow rate and flow rate of the material through the discharge port 12.

[0021] Preferably, the control device includes a pressure transmitter 4 and a proportional valve 5. The pressure transmitter 4 is arranged at the discharge port 12, and the proportional valve 5 is arranged at the top of the driving cylinder 2. The pressure transmitter 4 feeds back the sensed pressure change to the proportional valve 5, and the intake pressure of the driving cylinder 2 is adjusted through the proportional valve 5.

[0022] When the material (i.e., rubber material) is input, the discharge port 12 is closed, the feed port 11 is opened, and the proportional valve 5 of the driving cylinder 2 is opened at the same time, so that the material enters the cylinder 1 and lifts the piston 3 at the same time. The piston 3 drives the output rod 21 of the driving cylinder 2 to rise until the output rod 21 reaches the upper position of the driving cylinder 2. Then the material is output again, by closing the feed port 11, opening the discharge port 12, and opening the proportional valve 5, the output rod 21 of the driving cylinder 2 begins to descend, and the pressure change of the pressure transmitter at the discharge port 12 is fed back to the proportional valve 5 to adjust the intake pressure of the driving cylinder 2, thereby realizing the automatic control of the change of the injection pressure, and finally realizing the control of the output amount and output speed of the material.

[0023] Specifically, the pressure transmitter first senses the pressure of the material, and this pressure acts on the sensing element of the pressure transmitter, causing it to change. The sensing element (usually a piezoresistive or capacitive sensor) converts the pressure signal into a resistance value or a capacitance value according to the magnitude of the pressure. The transmitter part of the pressure transmitter (usually a bridge or a capacitive transmitter) converts the resistance value or capacitance value output by the sensing element into a standard current signal or voltage signal. These signals are usually linear, that is, the greater the pressure, the higher the current or voltage signal. The circuit part of the pressure transmitter amplifies, filters, linearizes, and processes the converted signal to ensure the accuracy and reliability of the signal. The processed signal is converted into a standard current signal or voltage signal, which is output to the control end of the proportional valve 5. That is, after the proportional valve 5 receives the current or voltage signal from the pressure transmitter, it controls the movement of the output rod 21 and the piston 3 according to the magnitude of the signal, thereby adjusting the flow rate of the fluid. A higher current or voltage signal will cause the piston 3 to move a larger distance, thereby increasing the speed and flow rate of the material through the discharge port 12; conversely, a lower signal will result in a smaller flow rate.

[0024] The driving cylinder 2 is provided with an exhaust hole 22 and a pressure gauge 6. When the pressure of the driving cylinder 2 exceeds the set threshold of the pressure gauge 6, the pressure is released through the exhaust hole 22. One or more small holes or channels are designed at the bottom of the driving cylinder 2, and these holes or channels are directly connected to the atmosphere to form the exhaust hole 22. When the internal pressure of the driving cylinder 2 is higher than the threshold set by the pressure gauge 6, the air can be discharged through the exhaust hole 22, thereby maintaining the pressure balance between the inside and the outside.

[0025] The mounting frame 7 also includes a plurality of spaced columns 71, a mounting plate 72 connected to the upper part of the columns 71 and a support plate 74 connected to the lower part. The cylinder barrel 1 is fixedly arranged below the mounting plate 72. A plurality of spaced mounting columns 73 are arranged above the mounting plate 72. The driving cylinder 2 is fixedly arranged on the mounting columns 73. The mounting frame 7 is used to fix the cylinder barrel 1 and the driving cylinder 2.

[0026] During assembly, the mounting frame 7 is placed on the foundation through the support plate 74, and the cylinder 1 and the mounting frame 7 are fixed by bolts. The piston 3 is passed through the center of the cylinder 1 and inserted into the cylinder 1. Then the four mounting columns 73 are installed on the top of the mounting plate 72 through screw threads. Then the driving cylinder 2 is fixed together with the four mounting columns 73 by bolts. The other end of the piston 3 is connected to the output rod 21 through screw threads. At this point, the main components are assembled. Then the pressure transmitter is installed at the discharge port 12 of the cylinder 1. The pressure gauge 6 and the proportional valve 5 are installed on the top of the driving cylinder 2 in the order of position.

[0027] When the cylinder barrel 1, the driving cylinder 2 or the piston 3 is damaged, the bolts can be removed to replace or repair them, which is convenient and quick.

[0028] One end of the piston 3 extends out of the cylinder barrel 1 and is detachably connected to the output rod 21 of the driving cylinder 2 through a threaded structure, so that the two can be easily disassembled and repaired.

[0029] The utility model adopts the gas control method and has the following advantages:

[0030] First, compared with hydraulic control, pneumatic control is overall clean and simple, and there is no need to worry about the risk of hydraulic oil leakage to the environment or pollution to the product.

[0031] Secondly, compared with electric control, pneumatic control has low overall cost, is suitable for large-scale production, and has a simple control method without too many complicated control circuits and logic programs.

[0032] Third, the gas control method has a greater competitive advantage in terms of later maintenance and operation as a whole, and is particularly suitable for working conditions with low thrust requirements and situations where mass production is required.

[0033] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A glue injection device using a cylinder to control the injection pressure, characterized in that: The invention comprises a cylinder barrel (1) and a driving cylinder (2), wherein the cylinder barrel (1) is provided with a feed port (11) and a discharge port (12), wherein the feed port (11) and the discharge port (12) are arranged on the same side of the cylinder barrel (1), and an output rod (21) of the driving cylinder (2) moves up and down along the cylinder barrel (1), and the output rod (21) is fixedly provided with a piston (3) which abuts against the inner wall of the cylinder barrel (1); When the feed port (11) is opened and the discharge port (12) is closed, the piston (3) moves toward a side away from the feed port (11) and introduces the material into the cylinder (1) along the feed port (11); When the feed port (11) is closed and the discharge port (12) is opened, the piston (3) moves toward the feed port (11) and discharges the material in the cylinder (1) along the discharge port (12); It also includes a control device, which is used to control the air intake pressure of the driving cylinder (2) and ultimately control the flow rate and flow rate of the material through the discharge port (12).

2. A glue injection device using a cylinder to control injection pressure according to claim 1, characterized in that: The control device comprises a pressure transmitter (4) and a proportional valve (5), wherein the pressure transmitter (4) is arranged at the discharge port (12), and the proportional valve (5) is arranged at the top of the driving cylinder (2). The pressure transmitter (4) feeds back the sensed pressure change to the proportional valve (5), and the intake pressure of the driving cylinder (2) is adjusted through the proportional valve (5).

3. A glue injection device using a cylinder to control injection pressure according to claim 2, characterized in that: The driving cylinder (2) is provided with an exhaust hole (22) and a pressure gauge (6); when the pressure of the driving cylinder (2) exceeds a set threshold value of the pressure gauge (6), the pressure is released through the exhaust hole (22).

4. A glue injection device using a cylinder to control injection pressure according to any one of claims 1 to 3, characterized in that: The invention also comprises a mounting frame (7), wherein the mounting frame (7) comprises a plurality of columns (71) arranged at intervals, and a mounting plate (72) connected to the columns (71); the cylinder barrel (1) is fixedly arranged below the mounting plate (72); a plurality of mounting columns (73) arranged at intervals are arranged above the mounting plate (72); and the driving cylinder (2) is fixedly arranged on the mounting columns (73).

5. The glue injection device using a cylinder to control the injection pressure according to claim 4, characterized in that: The cylinder barrel (1) and the mounting plate (72) are detachably connected via bolts.

6. A glue injection device using a cylinder to control injection pressure according to any one of claims 1 to 3, characterized in that: One end of the piston (3) extends out of the cylinder barrel (1) and is detachably connected to the output rod (21) of the driving cylinder (2) via a threaded structure.

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