Novel automatic gluing machine head

Abstract

The utility model discloses a novel automatic gluing machine head, which relates to the technical field of gluing machines and comprises a metering type screw valve, a glue inlet is arranged on the side surface of the upper end of the metering type screw valve, a glue outlet is arranged at the lower end of the metering type screw valve, and a roller with stripes on the surface is fixedly mounted on the side surface of the lower end of the metering type screw valve. A sensor is fixedly installed at the position, corresponding to the roller, of the metering type screw valve, a sensor acting gate and a roller acting gate form a capacitive gate sensor for obtaining the speed, and the capacitive gate sensor is electrically connected with a servo motor in the metering type screw valve. The device has the beneficial effects that the rotating speed of the servo motor is controlled in real time by taking the moving speed of the roller as a variable, so that the glue discharging speed and the moving speed of the metering type spiral valve form dynamic balance, and the servo motor can correspondingly adjust the rotating speed of the screw to realize adaptive adjustment of the glue discharging speed of the metering type spiral valve regardless of the moving speed of gluing; the problem that the gluing amount is not uniform due to the fact that the gluing speed is not stable due to manual operation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealant applicators, in particular to a novel automatic sealant applicator head. Background Art

[0002] The basic principle of current traditional dispensing machines generally is to extrude glue by controlling air pressure, and conduct quantitative control of the glue through a voltage stabilizing system. After a manual switch is pressed to give an electrical signal to the automatic dispensing machine, the main body of the automatic dispensing machine opens the air source through a solenoid valve, and controls the air source pressure through a pressure sensor, then gives a stable pressure to the head. The head is a glue gun connected by an air pressure pipe. At this time, the glue in the glue gun is under the action of pressure and is extruded through the needle at the head of the glue gun. After the manual switch is released, the solenoid valve closes the air source and releases the pressure at the same time, so that the air pressure in the glue gun is kept consistent with the external atmospheric pressure, the glue in the glue gun loses pressure, and the extrusion action stops, so as to achieve the effect of automatic dispensing.

[0003] The current problem is that the device only "switches" the dispensing through air pressure, or controls the amount of glue by the air pressure or the thickness of the needle. However, generally the products to be dispensed are static, while dispensing is a dynamic process. At this time, the control of the amount of glue is not only controlled by the air pressure or the thickness of the needle, but the moving speed of the glue gun plays a decisive role in the amount of dispensed glue. For many application scenarios, manual dispensing is used, and the control of the speed by manual dispensing is very unstable, which leads to the final amount of dispensed glue being very unstable. The basic solution is to use a metering screw valve (in fact, a single screw valve does not overcome the problem of the dynamic speed of dispensing) and a dispensing support wheel for dispensing. The dispensing support wheel can support the glue head to a certain extent, and then a photoelectric or inductive sensor scans and identifies the minute changes in the rolling of the support wheel, and converts them into electrical signals, and quantitatively extrudes glue to the metering screw valve through the electrical signals, so as to introduce the variable of speed into the amount of glue, so as to achieve the effect of dynamic quantitative control of the amount of glue; The metering screw valve: mainly composed of a servo motor, a screw, and a stator. The glue is connected to the stator through a connecting pipe. There is a screw connected to the servo motor inside the stator. After the servo motor receives the electrical signal, it drives the screw to rotate quantitatively, and the glue can flow and be extruded quantitatively between the screw and the stator.

[0004] In fact, glue dispensers are already very advanced now, especially when combined with automation. Existing manual glue dispensers can make the glue dispenser move at a constant speed through robotic arms and other means, and the amount of glue can be evenly coated on the object through the extrusion pressure and the moving speed of the robotic arm. There are mainly the following three types of existing automatic glue dispensers: ① A constant air pressure machine applies pressure to the glue tube to make the glue tube discharge glue relatively evenly, but this device cannot provide a constant speed, so the glue finally applied to the product is actually uneven; ② On the basis of ①, a reciprocating beam is added to enable a constant glue dispensing speed, but this device has certain requirements for the size of the construction product and is relatively limited in the construction of irregular products; ③ Those equipped with robotic arms can provide a stable feeding speed through the robotic arms, so that relatively even glue can be applied to the product, but the cost is relatively high. Summary of the Invention

[0005] The purpose of the present utility model is to provide a new type of automatic glue dispenser head in order to solve the above problems.

[0006] The present utility model realizes the above purpose through the following technical solutions:

[0007] A new type of automatic glue dispenser head includes a metering screw valve. An inlet for glue is arranged on the upper side surface of the metering screw valve, and an outlet for glue is arranged at the lower end of the metering screw valve. A roller with stripes on its surface is fixedly installed on the lower side surface of the metering screw valve. A sensor is fixedly installed at the position of the metering screw valve corresponding to the roller. The sensor serves as a fixed grating and the roller serves as a moving grating to form a capacitive grating sensor for obtaining speed. The capacitive grating sensor is electrically connected to a servo motor inside the metering screw valve.

[0008] Preferably: The metering screw valve includes a servo motor, a screw, and a stator. Glue enters the stator through the inlet for glue. A screw for pushing the glue is arranged inside the stator. A servo motor for driving the screw to rotate is fixedly installed on the stator. After receiving an electrical signal, the servo motor drives the screw to rotate quantitatively, and the glue can flow quantitatively between the screw and the stator and be extruded.

[0009] Preferably: The inlet for glue is connected to an external glue supply device through a pipeline.

[0010] Preferably: The capacitive grating sensor is connected to the servo motor through a signal conversion module. The signal conversion module includes a signal conditioning chip, an analog-to-digital converter (ADC) chip, a microprocessor or a DSP chip.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] By taking the moving speed of the roller as a variable to control the rotational speed of the servo motor in real time, a dynamic balance is formed between the glue discharging speed and the moving speed of the metering screw valve. Regardless of the fast or slow moving speed of the glue application, the servo motor will correspondingly adjust the rotational speed of the screw to achieve an adaptive adjustment of the glue discharging speed of the metering screw valve, solving the problem of uneven glue application caused by the unstable glue application speed during manual operation; the problem of unstable handholding is solved by the roller support. Brief Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of the head of a new type of automatic glue applicator described in the present invention.

[0015] The description of the reference numerals in the drawings is as follows:

[0016] 1. Glue inlet; 2. Power supply; 3. Glue outlet; 4. Roller; 5. Sensor; 6. Metering screw valve. Detailed Embodiments

[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0018] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] The present utility model will be further described below with reference to the accompanying drawings:

[0020] As Figure 1 shown, a new type of automatic glue applicator head includes a metering screw valve 6. An inlet 1 is arranged on the upper side of the metering screw valve 6, and the inlet 1 is connected to an external glue supply device through a pipeline. An outlet 3 is arranged at the lower end of the metering screw valve 6. A roller 4 with stripes on its surface is fixedly installed on the lower side of the metering screw valve 6. A sensor 5 is fixedly installed at the position of the metering screw valve 6 corresponding to the roller 4. The sensor 5 serves as a fixed grating and the roller 4 serves as a moving grating to form a capacitance grating sensor for obtaining speed. The capacitance grating sensor is electrically connected to a servo motor inside the metering screw valve 6.

[0021] The metering screw valve 6 includes a servo motor, a screw, and a stator. Glue enters the stator through the inlet 1. A screw for pushing the glue is arranged inside the stator. A servo motor for driving the screw to rotate is fixedly installed on the stator. After receiving an electrical signal, the servo motor drives the screw to rotate quantitatively, and the glue can flow quantitatively between the screw and the stator and be extruded.

[0022] The capacitance grating sensor is connected to the servo motor through a signal conversion module. The signal conversion module includes a signal conditioning chip, an analog-to-digital converter (ADC) chip, a microprocessor or a DSP chip.

[0023] Signal conditioning chip: A chip used for processing analog signals such as amplification and filtering.

[0024] Analog-to-digital converter (ADC) chip: A chip that converts analog signals into digital signals.

[0025] Microprocessor or DSP chip: A chip used for processing digital signals and generating control signals.

[0026] Servo motor controller chip: Although this is not a chip for directly converting signals, it is a key component in the entire control system, responsible for receiving the processed control signal and driving the servo motor.

[0027] The metering screw valve 6, signal conditioning chip, analog-to-digital converter (ADC) chip, microprocessor or DSP chip are all general standard components or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods. Therefore, no further description will be given here.

[0028] The above shows 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates 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 new type of automatic glue machine head, including a metering screw valve (6), characterized in that: The upper side of the metering screw valve (6) is provided with a glue inlet (1), the lower side of the metering screw valve (6) is provided with a glue outlet (3), the lower side of the metering screw valve (6) is fixedly mounted with a roller (4) with stripes on the surface, the metering screw valve (6) is fixedly mounted with a sensor (5) at a position corresponding to the roller (4), the sensor (5) serving as a fixed grid and the roller (4) serving as a moving grid to form a capacitive grid sensor for acquiring speed, and the capacitive grid sensor is electrically connected to a servo motor inside the metering screw valve (6).

2. According to claim 1, the new automatic glue machine head is characterized by: The metering screw valve (6) comprises a servo motor, a screw and a stator. Glue enters the stator through the glue inlet (1). A screw for pushing glue is arranged inside the stator. A servo motor for driving the screw to rotate is fixedly mounted on the stator. After receiving an electrical signal, the servo motor drives the screw to rotate quantitatively, so that the glue can flow quantitatively between the screw and the stator and be extruded.

3. According to claim 1, the new automatic glue machine head is characterized by: The glue inlet (1) is connected to an external glue supply device via a pipeline.

4. According to claim 1, the new automatic glue machine head is characterized by: The capacitive sensor is connected to the servo motor via a signal conversion module, and the signal conversion module includes a signal conditioning chip, an analog-to-digital converter chip, a microprocessor or a DSP chip.

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