Automatic dispensing device

Abstract

An automatic glue dispensing device comprises a workbench, an electric inflating pump, a fixing frame, an electric linear sliding table, an electric push rod, a glue supply mechanism, a control circuit and a gas storage box mechanism. The electric linear sliding table is installed on the lower side of the upper end of the fixing frame, and the upper end of the electric push rod is installed at the lower end of a sliding block of the electric linear sliding table. The electric inflation pump is installed on one side of the upper end of the fixing frame, the air storage box mechanism comprises an electromagnetic valve, a pressure switch and a box body and is installed on the other side of the upper end of the fixing frame, the upper end of the electromagnetic valve is connected with the exhaust end of the electric inflation pump, and the box body is provided with an exhaust pipe; the glue supply mechanism comprises a glue melting bin, an electric heating pipe and an electromagnetic valve A and is installed at the lower end of the electric push rod, and a control circuit is installed in an electric control box in front of the workbench. The hot melt adhesive dispensing device is mainly used for dispensing hot melt adhesive for parts, can quantitatively output the hot melt adhesive melted at a constant temperature to the corresponding positions of the parts, brings convenience to workers, correspondingly improves the working efficiency and is more convenient to apply.

Description

Technical Field

[0001] The utility model relates to the technical field of dispensing equipment, in particular to an automatic dispensing device. Background Art

[0002] Dispensing (gluing) is a relatively common processing procedure in production. Its main function is to bond two components together with glue (for example, bonding the main circuit board of a buzzer to the inside of the housing with hot melt glue). In the prior art, when using hot melt glue to bond components, generally, a worker specifically holds a hot melt gun and drips the melted glue at the front end of the gun head onto the bonding position of the corresponding component. In the above gluing mode, the worker needs to hold the component with one hand and the gluing gun with the other hand, which brings inconvenience to the worker and is not conducive to improving the gluing work efficiency. Moreover, affected by factors such as the worker's unfamiliarity with operation skills, it cannot be guaranteed that the amount of hot melt glue applied to the corresponding component each time is fixed. That is to say, it is possible that the amount of glue applied is insufficient, resulting in the bonding performance of the subsequent two components not meeting the stable requirements. It is also possible that the amount of glue applied is excessive, leading to an increase in production costs (there is also a problem that when the amount of glue is excessive, the corresponding components cannot be effectively installed in place). Summary of the Utility Model

[0003] In order to overcome the drawbacks that the existing equipment for using hot melt glue and dispensing brings inconvenience to workers due to its structure limitations, is not conducive to improving the dispensing work efficiency, and cannot accurately guarantee the amount of dispensed glue, the utility model provides an automatic dispensing device mainly used for dispensing hot melt glue for components. During application, under the joint action of relevant mechanisms, after the worker places the component to be dispensed on the dispensing station, it can quantitatively output the thermostatically melted hot melt glue to the corresponding position of the component, thereby bringing convenience to the worker, correspondingly improving the work efficiency, and preventing the amount of glue dispensed for the component from being too much or too little.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] An automatic dispensing device, comprising a workbench, an electric air pump, a fixing frame, an electric linear slide, and an electric push rod, characterized in that it further has a glue supply mechanism, a control circuit, and an air storage tank mechanism; both sides of the lower end of the fixing frame are respectively installed on both sides of the upper end of the workbench, the electric linear slide is installed on the lower side of the upper end of the fixing frame, and the upper end of the electric push rod is installed at the lower end of the sliding block of the electric linear slide; the electric air pump is installed on one side of the upper end of the fixing frame, the air storage tank mechanism includes a solenoid valve, a pressure switch, and a box body, the box body is installed on the other side of the upper end of the fixing frame, the solenoid valve and the pressure switch are respectively installed on the box body at the lower end, the upper end of the solenoid valve is connected to the exhaust end of the electric air pump, and the box body has an exhaust pipe; the glue supply mechanism includes a glue melting bin, an electric heating tube, and a solenoid valve A, there is a wire hole A at the upper end of the glue melting bin, the lower end of the electric push rod has an external thread, the lower end of the push column is threadedly connected to the upper end of the glue melting bin, a fixing shell is installed outside the glue melting bin, there are multiple electric heating tubes, and multiple electric heating tubes are installed in the fixing shell; the lower end of the glue melting bin is installed with a glue outlet pipe, and one side of the upper end is installed with a branch pipe, there are two solenoid valves A, the upper end of the first solenoid valve A is connected to the lower end of the glue outlet pipe, the lower end of the first solenoid valve A is installed with a glue injection pipe, one end of the second high-temperature resistant solenoid valve A is connected to one side of the branch pipe, and the other end of the second solenoid valve A is connected to the exhaust pipe through a hose; the control circuit is installed in the electric control box of the workbench, one end of the pressure switch is electrically connected to the power input ends of the solenoid valve and the electric air pump, and the power output end of the control circuit is electrically connected to the power input end of the solenoid valve A.

[0006] Further, the solenoid valve and the solenoid valve A are normally closed spool solenoid valves, and the pressure switch is a normally closed contact electrical contact pressure switch.

[0007] Further, a hot melt adhesive stick is added into the glue melting bin.

[0008] Further, the multiple electric heating tubes are equipped with a temperature switch, and the temperature switch is installed on the other side of the upper end of the glue melting bin.

[0009] Further, the control circuit includes a photoelectric switch and a time control switch, a fixing shell is installed on the upper end of the workbench, the photoelectric switch is installed in the fixing shell and the detection head is located outside the upper end of the fixing shell, and the power output end of the photoelectric switch is connected to the power input end of the time control switch through a wire.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) The present model is mainly applied to the use of hot melt adhesive for gluing components. During application, multiple electric heating rods can keep the hot melt adhesive rod melted at a constant temperature. When the staff places the component to be glued on the gluing station (above the photoelectric switch), under the action of the time control switch, the hot melt adhesive melted at a constant temperature can be quantitatively output to the corresponding position of the component, bringing convenience to the staff, correspondingly improving work efficiency, and preventing the problem of excessive or insufficient gluing amount for the component; (2) The present model can also control the height and horizontal position of the glue applicator tube through the electric push rod and the electric linear slide table, facilitating gluing at the corresponding positions of components with different shapes (for example, some batch components are tall or short, and the height of the glue applicator tube needs to be adjusted to be higher or lower accordingly; after some batch components are placed on the fixed shell, the relative position with the lower end of the glue applicator tube is left or right, and the glue applicator tube needs to be adjusted to be located on the left or right accordingly), making the application more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the overall structure and partial enlarged structure of the present utility model.

[0013] Figure 2 It is the circuit diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Figure 1 、 2As shown in the figure, an automatic dispensing device includes a workbench 3, an electric air pump M, a "Π"-shaped fixing frame 1, an electric linear slide M1, an electric push rod M2, power switches S and S2, and a power supply module G1. It also has a glue supply mechanism, a control circuit 2, and an air storage tank mechanism. The two sides of the lower end of the fixing frame 1 are respectively welded to the middle parts of the upper sides of the two sides of the workbench 3. The upper end of the housing of the electric linear slide M1 is horizontally and fixedly installed on the lower side of the upper end of the fixing frame 1. The upper end of the cylinder of the electric push rod M2 is vertically and fixedly installed on the lower end of the sliding block of the electric linear slide M1. The electric air pump M is fixedly installed on the left side of the upper end of the fixing frame 1. The air storage tank mechanism includes a high-temperature resistant solenoid valve DC1, a pressure switch S1, and a sealed box body 4. The box body 4 is fixedly installed on the right side of the upper end of the fixing frame 1. There are threaded holes on the left side and the middle of the upper end of the box body 4. The lower end and the left threaded hole of the high-temperature resistant solenoid valve DC1 are hermetically connected by threads. The upper end of the high-temperature resistant solenoid valve DC1 and the exhaust end of the electric air pump M are connected by a pipeline. The air inlet pipe of the pressure switch S1 and the right threaded hole are hermetically connected by threads. A exhaust pipe 41 that communicates with its interior is welded to the lower left front of the box body 4. The glue supply mechanism includes a cylindrical glue melting tank 51, an electric heating tube RT, and a high-temperature resistant solenoid valve ADCN. There is a threaded hole A511 in the middle of the upper end of the glue melting tank 51, and the lower end is a conical structure. The lower end of the push rod of the electric push rod M1 has an external thread, and the lower end of the push rod and the threaded hole A511 at the upper end of the glue melting tank are hermetically connected by threads. A hollow fixed shell 52 (above the conical part) is hermetically welded to the outside of the glue melting tank. There are three electric heating tubes RT, and the three electric heating tubes RT are annularly distributed and installed in the fixed shell (the wires connected in parallel with the three electric heating tubes RT are sleeved in multi-section ceramic insulating tubes and led out through the holes on the upper side of the fixed shell 52, and the holes are sealed with heat-resistant sealant). A glue outlet pipe 53 is vertically welded to the lower end of the conical part of the glue melting tank 51, and a branch pipe 54 that communicates with its interior is welded to the upper right side. There are two high-temperature resistant solenoid valves ADCN. The upper end of the first high-temperature resistant solenoid valve ADCN is connected to the lower end of the glue outlet pipe 53 by threads. A glue injection pipe 55 is installed at the lower end of the first high-temperature resistant solenoid valve ADCN by threads. The lower end of the glue injection pipe 55 is a conical structure. One end of the second high-temperature resistant solenoid valve ADCN is connected to the right side of the branch pipe 54 by threads. The other end of the second high-temperature resistant solenoid valve ADCN is installed with a connecting pipe 56 by threads. The connecting pipe 56 and the exhaust pipe 41 are connected by a hose 6 with a length margin (the two ends of the hose 6 are respectively hermetically inserted on the outside of the connecting pipe 56 and the exhaust pipe 41). The power switches S and S2, the power supply module G1, and the control circuit 2 are installed in the electric control box 7 on the front right end of the workbench.

[0015] Figure 1 、 2As shown, the solenoid valve DC1 and the solenoid valve ADCN are normally closed spool solenoid valves, and the pressure switch S1 is a finished product of an adjustable normally closed contact electric contact pressure switch (model PS20-SGN). Multiple sections of hot melt adhesive rods are added into the melting glue bin 51 (specifically, first remove the hose 6, then unscrew the lower end of the push rod of the electric push rod M1 and separate it from the melting glue bin 51, cut the hot melt adhesive rod into multiple sections and put them into the melting glue bin 51, then screw the lower end of the push rod of the electric push rod M1 and the upper end threaded hole A511 of the melting glue bin 51 together through threads, and finally seal and insert the two ends of the hose 6 on the outer sides of the connecting pipe 56 and the exhaust pipe 41 respectively). Three electric heating tubes RT are equipped with a temperature switch W, and the temperature switch W is installed at the upper end of the melting glue bin 51 with a "Π"-shaped fixing clip 8 (the lower end of the fixing clip 8 is welded to the middle outside of the upper left side of the melting glue bin 51, and the temperature switch W is fixed between the lower end of the upper part of the fixing clip and the middle outside of the upper left side of the melting glue bin 51). The temperature sensing surface of the temperature switch W is closely attached to the outside of the upper end of the melting glue bin 51, and one end of the temperature switch W and one end of the power input of the three electric heating tubes RT are connected by a wire. The control circuit includes a photoelectric switch G and a time control switch G2 (installed in the electric control box). A fixing shell 31 is welded to the middle of the upper end of the workbench. There is an opening in the middle of the upper end of the fixing shell 31. The photoelectric switch G is fixedly installed in the fixing shell 31 and the detection head is vertically located outside the lower end of the opening. The power output terminals 3 and 2 of the photoelectric switch G and the power input terminals 1 and 2 of the time control switch G2 are respectively connected by wires.

[0016] Figure 1 、 2 As shown, the power input terminals 1 and 2 of the power supply module G1 and the two poles of the AC 220V power supply are respectively connected by wires. One pole of the 220V power supply and one end of the pressure switch S1 are connected by a wire. The other end of the pressure switch S1 and the other pole of the 220V power supply and the power input ends of the high-temperature resistant solenoid valve DC1 and the electric air pump M are respectively connected by wires. The power output terminals 3 and 4 of the power supply module G1 and the power input terminals 1 and 2 of the two power switches S and S2, the other end of the temperature switch W and the other end of the power input of the three electric heating tubes RT, and the power input terminals 1 and 2 of the power supply input of the control circuit, the photoelectric switch G are respectively connected by wires. The power output terminals 3 and 4 of the time control switch G2 of the power output of the control circuit and the power input ends of the two high-temperature resistant solenoid valves ADCN are respectively connected by wires.

[0017] Figure 1 、 2As shown, after turning on the main power switch and the AC 220V power enters the power input terminal of power module G1 (the handles of all power switches are located outside the three openings on the front side of the electric control box), the DC 24V power output from pins 3 and 4 of power module G1 enters the power input terminals of power switches S, S2, control circuit, and electric heating tubes. When the temperature in the glue melting chamber is lower than 170°C, the internal contacts of temperature switch W close. In this way, the 24V power enters the power input terminals of the three electric heating tubes RT, and the three electric heating tubes RT are energized to generate heat to heat the hot melt adhesive section in the glue melting chamber 51, and the hot melt adhesive section melts into a liquid state; when the temperature in the glue melting chamber is higher than 170°C, the internal contacts of temperature switch W open. In this way, the 24V power no longer enters the power input terminals of the three electric heating tubes RT, and the three electric heating tubes RT are no longer energized to generate heat to heat the hot melt adhesive section in the glue melting chamber 51. Through the above, this new type can always keep the hot melt adhesive in the glue melting chamber in a constant temperature liquid state during operation. When the pressure in the box body 4 is lower than 0.1 MPa, the internal contacts of pressure switch S1 close. In this way, the 220V power will enter the power input terminals of solenoid valve DC1 and air pump M. The solenoid valve DC1 is energized and its valve core opens, and the air pump M is energized to work to add pressurized compressed air into the box body 4; when the pressure in the box body 4 is higher than 0.1 MPa, the internal contacts of pressure switch S1 open. In this way, the 220V power no longer enters the power input terminals of solenoid valve DC1 and air pump M. The solenoid valve DC1 loses power and its valve core closes, and the air pump M loses power and no longer adds compressed air into the box body 4. Through the above, this new type can always keep the pressure in the box body 4 at a constant pressure during operation. During actual operation, the staff toggles the handle of power switch S to the left or right, and pins 1, 2 and 3, 4 or 5, 6 of power switch S are respectively connected. The positive and negative or negative and positive power input terminals of the electric linear slide M1 will be energized, and the sliding block of the electric linear slide M1 drives the glue supply mechanism to move left or right to a suitable position above the fixed shell 31. After reaching the position, the power switch is turned off.

[0018] The staff toggles the handle of power switch S2 to the left or right, and pins 1, 2 and 3, 4 or 5, 6 of power switch S2 are respectively connected. The positive and negative or negative and positive power input terminals of the electric push rod M2 will be energized, and the push rod of the electric push rod M2 drives the glue supply mechanism to move up or down to a suitable position above the fixed shell 41. After reaching the position, the power switch is turned off. Through the above, this new type can control the height and horizontal position of the glue injection tube through the electric push rod and the electric linear slide, which is convenient for applying glue to the corresponding positions of different-shaped parts (for example, some batch parts are high or low, and the height of the glue injection tube needs to be adjusted to be higher or lower adaptively. After some batch parts are placed on the fixed shell, the relative position with the lower end of the glue injection tube is left or right biased, and the glue injection tube needs to be adjusted to be located on the left or right adaptively), and the application is more convenient.

[0019] Figure 1 、2 As shown, when there is no glue applied to the components, the upper end of the detection head of the photoelectric switch G is not blocked, so its pin 3 does not output a high level. Then, the two solenoid valves ADCN will not be powered on to work, and the liquid glue in the glue melting tank will not flow out to the corresponding positions of the components. When the staff places the component on the fixed housing 31, the detection head of the photoelectric switch G is blocked, and the power supply of its pins 3 and 2 is output to the power input terminal of the time control switch G2. The power supply of the pins 3 and 4 of the time control switch G2 reaches the power input terminals of the two solenoid valves ADCN at regular intervals (for example, outputs power for 2 seconds after an interval of 3 seconds, and the actual time is adjustable). The two solenoid valves ADCN are powered on to work and the valve cores are opened. In this way, the pressurized air in the box body 4 enters the glue melting tank through the solenoid valve ADCN with the first valve core opened. The pressurized air pushes the liquid glue in the glue melting tank, passes through the glue outlet pipe 53, the second solenoid valve ADCN with the valve core opened, and the glue application pipe 55, and drips onto the corresponding glue application positions of the corresponding components (the longer the power supply time output by the time control switch G2, the more glue will be output to the corresponding positions of the components; conversely, the less glue will be output to the corresponding positions of the components; the interval of 3 seconds is because when the component is placed on the fixed housing 31, if the glue is output immediately without delay, the glue will not accurately drip onto the corresponding glue application positions of the component. Due to the 3-second delay, this time period can fully meet the needs of the staff to place the corresponding glue application position of the component at the lower end of the glue application pipe 55; the greater the air pressure in the box body 4, the more glue will be output; conversely, the less; the above time and glue output volume can be adjusted by the staff according to needs). During the specific glue application, after the glue application is completed and the staff removes the component, the upper end of the detection head of the photoelectric switch G is no longer blocked, so its pin 3 stops outputting a high level again. Then, the two solenoid valves ADCN lose power again and stop working, and the liquid glue in the glue melting tank no longer flows out, preparing for the glue application of the next component. Through the above, after the staff of this new type places the component that needs to be glued on the glue application station (above the photoelectric switch), it can quantitatively output the hot melt glue after constant temperature melting to the corresponding positions of the component, bringing convenience to the staff, correspondingly improving the work efficiency, and preventing the problem of too much or too little glue applied to the component. Figure 2Among them, the power supply module G1 is a finished product of an AC 220V to DC 24V switching power supply module; the electric heating tube RT is a DC heating rod with a working voltage of DC 24V and a power of 200W; the electric push rod M2 is a finished product of a reciprocating electric telescopic rod with a power of 20W; the electric linear slide M1 is a finished product of an electric screw type slide with a power of 80W; the electric air pump M has a power of 1KW; the solenoid valve DC1 has a power of 2W and a working voltage of 220V; the solenoid valve ADCN has a power of 2W and a working voltage of DC 24V; the photoelectric switch G is a finished product of a photoelectric switch of model E3F-DS10C4, which has two power input terminals and one power output terminal. When working, when there is no obstacle at the upper emission and reception head, the power output terminal does not output power, otherwise it outputs power. The lower end of its shell has a detection distance adjustment knob. Adjusting it to the left makes the detection distance shorter, and adjusting it to the right makes the detection distance longer (it is appropriate to adjust it to 1 cm in this embodiment); the temperature switch W is a snap-action normally closed contact type temperature switch of model KSD301 (detecting temperature 170°C); the time control switch G2 is a finished product of a time control switch of model kg316t and brand Delixi, which has two power input terminals, two power output terminals, and seven setting buttons. By adjusting the seven setting buttons respectively, the interval time for the two power output terminals to output power can be set. The above Figure 2 Among them, all the devices are mature products, and this application will not elaborate on the working principle.

[0020] Those skilled in the art should understand that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The protection scope of this application is defined by the claims.

Claims

1. An automatic dispensing device, comprising a workbench, an electric air pump, a fixing frame, an electric linear slide, and an electric push rod, characterized in that, It also has a glue supply mechanism, a control circuit, and an air storage tank mechanism; both sides of the lower end of the fixed frame are respectively installed on both sides of the upper end of the workbench, the electric linear slide is installed on the lower side of the upper end of the fixed frame, and the upper end of the electric push rod is installed at the lower end of the sliding block of the electric linear slide; the electric air pump is installed on one side of the upper end of the fixed frame, and the air storage tank mechanism includes a solenoid valve, a pressure switch, and a box body. The box body is installed on the other side of the upper end of the fixed frame. The lower ends of the solenoid valve and the pressure switch are respectively installed on the box body. The upper end of the solenoid valve is connected to the exhaust end of the electric air pump, and the box body has an exhaust pipe; the glue supply mechanism includes a glue melting bin, an electric heating tube, and a solenoid valve A. There is a wire hole A at the upper end of the glue melting bin. The lower end of the electric push rod has an external thread, and the lower end of the push column and the upper end of the glue melting bin are connected by threads. A fixed shell is installed outside the glue melting bin. There are multiple electric heating tubes, and multiple electric heating tubes are installed in the fixed shell; the lower end of the glue melting bin is installed with a glue outlet pipe, and a branch pipe is installed on one side of the upper end. There are two solenoid valves A. The upper end of the first solenoid valve A is connected to the lower end of the glue outlet pipe. The lower end of the first solenoid valve A is installed with a glue injection pipe. One end of the second high-temperature-resistant solenoid valve A is connected to one side of the branch pipe, and the other end of the second solenoid valve A is connected to the exhaust pipe through a hose; the control circuit is installed in the electric control box of the workbench. One end of the pressure switch is electrically connected to the power input ends of the solenoid valve and the electric air pump, and the power output end of the control circuit is electrically connected to the power input end of the solenoid valve A.

2. The automatic dispensing device according to claim 1, characterized in that, The solenoid valve and the solenoid valve A are normally closed spool solenoid valves, and the pressure switch is a normally closed contact electric contact pressure switch.

3. An automatic dispensing device according to claim 1, characterized in that, A hot melt adhesive stick is added into the glue melting bin.

4. An automatic dispensing device according to claim 1, characterized in that, Multiple electric heating tubes are equipped with temperature switches, and the temperature switches are installed on the other side of the upper end of the glue melting bin.

5. An automatic dispensing device according to claim 1, characterized in that, The control circuit includes a photoelectric switch and a time control switch. A fixed shell is installed on the upper end of the workbench. The photoelectric switch is installed in the fixed shell and the detection head is located outside the upper end of the fixed shell. The power output end of the photoelectric switch is connected to the power input end of the time control switch through a wire.

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