A manual control type dispensing machine and dispensing method

Abstract

A kind of manual control type point glue machine and point glue method, the point glue machine includes: pressure vessel, support, two-component point glue valve being installed in support, two pipelines being communicated two glue inlets of two-component point glue valve and the pressure vessel, glue nozzle being combined two glue outlets of two-component point glue valve, foot switch, with two-component point glue valve and foot switch electric connection, controller for controlling two-component point glue valve and switch between three kinds of states of double pass, single pass and closed.The method includes: controlling two-component point glue valve in double pass state, and quickly glue to product;After quick glue, control two-component point glue valve in single pass state, and slowly glue to the product.Waves and bubbles generated by early quick glue can be eliminated by later slow glue.

Description

Technical Field

[0001] This invention relates to the field of dispensing machines, and in particular to a manually controlled dispensing machine and dispensing method. Background Technology

[0002] A dispensing machine is a device that fills the interior of electronic products with adhesive. Based on the control method, dispensing machines can be divided into automatic and manual types.

[0003] While automatic dispensing machines offer advantages such as high efficiency and labor savings, their complex structure and high price make them unsuitable for small businesses.

[0004] Because of its significantly lower cost compared to automatic dispensing machines, manually controlled dispensing machines have a broad market prospect. A typical manually controlled dispensing machine includes: a pressure tank, a bracket, a dispensing valve, a controller, and a foot switch. The dispensing valve is supported on the bracket, its inlet is connected to the pressure tank, and its outlet is equipped with a nozzle. The dispensing valve is electrically connected to the output of the controller, and the foot switch is electrically connected to the input of the controller. The adhesive is contained in the pressure tank. During operation, the product is held at the nozzle by hand, and the foot switch triggers the controller, which in turn controls the dispensing valve to open. The adhesive in the pressure tank passes through the dispensing valve and fills the product through the nozzle. After completion, the foot switch triggers the controller to close the dispensing valve, stopping the filling of adhesive into the product. This type of manually controlled dispensing machine has the following drawbacks: for adhesives with good flowability, waves are easily generated during dispensing, causing adhesive overflow; for adhesives with poor flowability, air bubbles are easily generated during dispensing, and after the air bubbles are expelled, insufficient adhesive may be dispensed. Summary of the Invention

[0005] The purpose of this invention is to provide a manually controlled dispensing machine and dispensing method to overcome the aforementioned deficiencies in related technologies.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A manually controlled dispensing machine, comprising:

[0008] A pressure vessel used to contain colloids;

[0009] support;

[0010] A two-component dispensing valve is mounted on the bracket, the two-component dispensing valve having two inlets and two outlets;

[0011] Two pipes connect the two glue inlets to the pressure vessel;

[0012] A glue inlet end is connected to the two glue outlets;

[0013] Foot switch; and

[0014] The controller, which is electrically connected to the two-component dispensing valve and the foot switch, is used to control the two-component dispensing valve to switch between three states: double-pass, single-pass, and closed.

[0015] In the aforementioned manually controlled dispensing machine, preferably, one of the two pipes is also equipped with a throttle valve.

[0016] In the aforementioned manually controlled dispensing machine, preferably, the dispensing machine further includes a sensor, which is located on one side below the nozzle. The controller is electrically connected to the sensor to form an anti-misoperation circuit, which is used to prevent the foot switch from being accidentally triggered to start dispensing.

[0017] In the aforementioned manually controlled dispensing machine, preferably, the sensor is a diffuse reflection photoelectric switch.

[0018] In the above-mentioned manually controlled dispensing machine, preferably, the controller includes a PLC and a time relay, the time relay and the PLC are connected to form a quantitative dispensing circuit, and the quantitative dispensing circuit is used to control the dispensing machine to dispense quantitatively.

[0019] In the aforementioned manually controlled dispensing machine, preferably, the controller further includes:

[0020] The first switch, which is electrically connected to the input terminal of the PLC, is used to turn the quantitative dispensing function on / off.

[0021] The second switch is electrically connected to the input terminal of the PLC and is used to turn the anti-misoperation function on / off.

[0022] The third switch, which is electrically connected to the input terminal of the PLC, is used to switch between single-component mode and two-component mode.

[0023] The fourth switch, which is electrically connected to the input terminal of the PLC, is used to turn on / off the quantitative-slow automatic switching function, which is used to automatically switch to slow dispensing after quantitative dispensing is completed.

[0024] A dispensing method comprising the following steps:

[0025] Controlling the two-component dispensing valve to a dual-flow state allows both pipes to simultaneously supply adhesive to the nozzle, enabling rapid dispensing onto the product; and

[0026] After rapid dispensing is completed, the two-component dispensing valve is controlled to be in a one-way state, so that one of the two pipes supplies adhesive to the nozzle alone, and slowly dispenses adhesive to the product.

[0027] Preferably, the dispensing method further includes the following step: before starting dispensing, adjusting the throttle valve on the pipeline to obtain the target dispensing speed.

[0028] Preferably, the dispensing method further includes the following steps:

[0029] Before dispensing begins, the controller receives a trigger signal from the foot switch and uses a sensor to identify whether there is a product or a hand at the nozzle. If the identification result is no product or hand, the two-component dispensing valve is locked in the closed state; if the identification result is yes, the two-component dispensing valve is controlled to enter the dual-pass state and start rapid dispensing.

[0030] During the dispensing process, the controller uses sensors to identify whether the product or a person's hand has been removed from the nozzle. When removal is detected, the controller controls the two-component dispensing valve to enter the closed state.

[0031] Preferably, the dispensing method further includes the following steps:

[0032] Before dispensing begins, the controller detects the status of the first and fourth switches to identify whether the quantitative dispensing function and the quantitative-slow automatic switching function are enabled.

[0033] When the quantitative dispensing function is enabled and the quantitative-slow automatic switching function is not enabled, the controller controls the duration of rapid dispensing through a time relay. After the rapid dispensing ends, the controller receives the trigger signal from the foot switch again and controls the two-component dispensing valve to briefly switch to one-way, and then performs slow dispensing on the product.

[0034] When both the quantitative dispensing function and the quantitative-slow automatic switching function are enabled, the controller controls the duration of rapid dispensing via a time relay. After rapid dispensing ends, the controller controls the two-component dispensing valve to switch to a single-pass state, automatically dispensing the product slowly. In the slow dispensing state, after receiving the trigger signal from the foot switch again, the controller controls the two-component dispensing valve to briefly switch to a single pass state, jogging the product slowly.

[0035] Compared with the prior art, the present invention has at least the following beneficial effects:

[0036] This invention relates to a dispensing machine with multiple dispensing speeds. During the dispensing process for a product, a fast dispensing speed is used initially, followed by a slow dispensing speed. Waves and bubbles generated by the fast dispensing speed can be eliminated by the slow dispensing speed. Furthermore, because of the fast dispensing speed initially and the slow dispensing speed later, the operator can promptly stop dispensing when the machine is full, preventing overflow and resulting in high work efficiency.

[0037] After further setting up the sensor, on the one hand, it forms an anti-misoperation circuit, which can prevent the foot switch from accidentally triggering the dispensing. On the other hand, compared with using a foot switch to control the dispensing to stop, using the removal of the product to control the dispensing to stop has the characteristics of high control sensitivity, which helps to reduce glue overflow and glue shortage.

[0038] With the addition of a time relay, a hybrid dispensing method combining manual and quantitative dispensing can be achieved, reducing the operator's workload.

[0039] It features dispensing control modes including single-speed, multi-speed, quantitative, non-quantitative, foot switch control for dispensing start and stop, and foot switch and sensor combination control for dispensing start and stop, making it suitable for a variety of applications. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of an embodiment of a dispensing machine;

[0041] Figure 2 Its schematic diagram;

[0042] Figure 3 Its circuit diagram;

[0043] Figure 4 This is a schematic diagram of the controller panel;

[0044] Figure label:

[0045] 1. Pressure vessel; 2. First pipeline; 3. Second pipeline; 4. Two-component dispensing valve; 5. Nozzle; 6. Substrate; 61. Support; 7. Throttling valve; 8. Diffuse reflection photoelectric switch; 9. Controller; 11. Pressure reducing valve; 12. Main air pipe; 13. Power converter;

[0046] L1, First indicator light; L2, Second indicator light; L3, Third indicator light; L4, Fourth indicator light; L5, Fifth indicator light; L6, Sixth indicator light; L7, Seventh indicator light; L8, Eighth indicator light;

[0047] SB1, foot switch; SB2, power switch; SB3, first switch; SB4, fourth switch; SB5, third switch; SB6, second switch;

[0048] KT1, time relay; CT1, counter;

[0049] FU, safety switch;

[0050] F. Solenoid valve. Detailed Implementation

[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0052] Please refer to Figures 1 to 2 This manually controlled dispensing machine includes: a pressure vessel 1, a bracket 61, a two-component dispensing valve 4, a first pipe 2, a second pipe 3, a nozzle 5, a foot switch SB1, and a controller 9. The pressure vessel 1, bracket 61, and controller 9 are mounted on a base plate 6.

[0053] Pressure vessel 1 is used to contain colloid. Pressure vessel 1 is equipped with pressure reducing valve 11, which is connected to the main gas pipe 12 to supply pressurized gas into pressure vessel 1, which forces the colloid in pressure vessel 1 toward nozzle 5 to dispense it onto the product.

[0054] The bracket 61 is used to support the nozzle 5 and the dispensing valve.

[0055] Dispensing valves are specialized valves for dispensing machines, available in pneumatic and electric versions. Pneumatic dispensing valves consist of three interconnected parts: a cylinder, a valve body, and a feed cylinder. The cylinder and valve body are separated by advanced sealing materials to prevent glue from entering the cylinder. The feed cylinder and cylinder are connected to the valve body, ensuring concentricity. A solenoid valve F drives the cylinder, which in turn moves a central rod up and down, thus opening and closing the dispensing valve. Depending on the opening and closing method, they can be categorized as: plunger-type dispensing valves, pin-type dispensing valves, lift-type dispensing valves, spray dispensing valves, and jet dispensing valves. Electric dispensing valves include a pump body and drive unit, with a matching stator for easy installation. They feature a stator-rotor structure design for excellent sealing performance. The rotor and stator assembly form a self-sealing structure, facilitating easy replacement. The rotor's directional rotation within the stator cavity enables media delivery. Based on the number of channels, dispensing valves are further classified as single-component dispensing valves and two-component dispensing valves. Two-component dispensing valves have two valve cores that can be closed / opened independently. Two-component dispensing valves are also called AB dispensing valves and are mostly used in AB dispensing machines.

[0056] In this embodiment, a pneumatic two-component dispensing valve 4 is used. The two-component dispensing valve 4 is fixed on the bracket 61.

[0057] The two-component dispensing valve 4 has two inlet ports and two outlet ports. One inlet port is connected to the pressure vessel 1 through the first pipe 2, and the other inlet port is connected to the pressure vessel 1 through the second pipe 3.

[0058] One end of the nozzle 5 is connected to the two outlets of the two-component dispensing valve 4. In other words, the adhesive discharged from both outlets is discharged through the same nozzle 5.

[0059] The two cylinders of the two-component dispensing valve 4 are connected to the main air pipe 12.

[0060] The two solenoid valves F of the two-component dispensing valve 4 are electrically connected to the controller 9. Under the control of the controller 9, the two-component dispensing valve 4 switches between a two-way state, a one-way state, and a closed state. In the two-way state, the adhesive in the pressure vessel 1 is discharged to the nozzle 5 through the first pipe 2 and the second pipe 3, achieving rapid dispensing. In the one-way state, the adhesive in the pressure vessel 1 is discharged to the nozzle 5 through the second pipe 3, achieving slow dispensing. In the closed state, the pressure vessel 1 cannot discharge adhesive to the nozzle 5.

[0061] Foot switch SB1 is electrically connected to controller 9 and is used to control dispensing.

[0062] The aforementioned dispensing machine features multiple dispensing speeds. During the dispensing process for a product, a fast dispensing speed is used initially, followed by a slow dispensing speed. This eliminates the waves and air bubbles generated by the fast dispensing, which can be eliminated by the slow dispensing speed later. By using a fast dispensing speed initially and a slow dispensing speed later, high work efficiency can be achieved while preventing glue overflow caused by slow operation after the initial dispensing is complete.

[0063] Furthermore, a throttle valve 7 is installed in the second pipe 3, which can adjust the flow rate of the adhesive in the second pipe 3. In this way, the discharge speed of slow dispensing can be flexibly set as needed. On the one hand, it is convenient for inexperienced operators to further reduce the discharge speed when dispensing slowly, so as to avoid overflow caused by insufficient operation speed. On the other hand, it can better adapt to adhesives with different flow rates.

[0064] Furthermore, this dispensing machine also includes a sensor, preferably a diffuse reflection photoelectric switch 8 in this embodiment. The diffuse reflection photoelectric switch 8 is fixed to the substrate 6 on one side below the nozzle 5 and is electrically connected to the controller 9, forming an anti-misoperation circuit. Its working principle is: the diffuse reflection photoelectric switch 8 identifies whether there is a product on the nozzle 5. If there is no product, the controller 9 locks the dispensing valve in the closed state, and even if the foot switch SB1 is pressed, the dispensing valve cannot be opened. It should be understood that in this invention, the product is held by hand at the dispensing end of the nozzle 5, so using a sensor to detect the hand can achieve the same purpose. The type of sensor that can be used is not limited to this; any sensor that can identify whether there is a product or a hand on the nozzle 5 can be used, such as a camera, CCD sensor, other photoelectric sensors, pyroelectric infrared sensors, etc.

[0065] The aforementioned sensor also serves another function: controlling the dispensing to stop. When the sensor detects the product at the nozzle 5 or the removal of the hand holding the product, the controller 9 controls the dispensing valve to close, stopping the dispensing process.

[0066] Compared to existing foot switches that control the dispensing stop, this embodiment uses a sensor to control the dispensing stop. Since the hand is much more sensitive than the foot, this embodiment has higher sensitivity in controlling the dispensing stop, and can better avoid glue overflow and glue shortage caused by untimely action.

[0067] Reference Figure 2 The mains power supply provides power to the controller 9 through the power converter 13.

[0068] Reference Figure 3 In this embodiment, the controller 9 includes a PLC (Programmable Logic Controller), and a 24V DC power supply is provided to the PLC through a fuse switch FU. Pins X0-X6 of the PLC are input terminals, and pins Y0-Y3 are input terminals.

[0069] The X0 pin of the PLC is connected to the diffuse reflection photoelectric switch 8, and the first indicator light L1 is connected between the X0 pin and the power supply. The status of the diffuse reflection photoelectric switch 8 can be determined through the first indicator light L1.

[0070] The X1 pin of the PLC is connected to the foot switch SB1. The second indicator light L2 is connected between the X1 pin and the power supply. The status of the foot switch SB1 can be known through the second indicator light L2.

[0071] The PLC's Y2 and Y3 pins are connected to the two solenoid valves F of the two-component dispensing valve 4, which are used to control the state switching of the two-component dispensing valve 4. The Y2 pin is connected to the seventh indicator light L7, and the Y3 pin is connected to the eighth indicator light L8. Through the seventh indicator light L7 and the eighth indicator light L8, it can be known whether the dispensing is fast or slow.

[0072] The PLC's X2 pin is connected to a time relay KT1. The coil of time relay KT1 is connected between the PLC's Y1 pin and ground. Time relay KT1 and the PLC form a quantitative dispensing circuit. When time relay KT1 reaches the set time, it triggers the PLC via X2 pin. The PLC controls the two-component dispensing valve 4 to switch from a double-pass state to a closed state, or from a double-pass state to a single-pass state. This ensures a fixed dispensing volume for rapid dispensing, which is quantitative dispensing. In quantitative dispensing mode, the controller 9 locks the dispensing valve in the double-pass state, unaffected by the foot switch SB1. Because the quantitative dispensing volume is fixed and requires no manual intervention, it offers more precise dispensing and reduces operator workload.

[0073] The PLC's X3 pin is connected to a first switch SB3, which triggers the PLC to turn the metering dispensing function on / off. A third indicator light L3 is connected between this X3 pin and the power supply; the indicator light L3 shows whether the metering dispensing function is enabled.

[0074] The PLC's X4 pin is connected to a fourth switch SB4. Switch SB4 triggers the PLC to enable / disable the automatic quantitative-slow dispensing function. This function means that after the rapid quantitative dispensing is completed, the controller 9 automatically switches to slow dispensing, requiring no manual operation. A fourth indicator light L4 is connected between pin X4 and the power supply, indicating whether the automatic quantitative-slow dispensing function is enabled.

[0075] The PLC's X5 pin is connected to a third switch SB5, which triggers the PLC to switch between single-component and two-component modes. In single-component mode, both the first pipe 2 and the second pipe 3 are connected to the same pressure vessel 1, supplying the same component of adhesive to the nozzle 5. In two-component mode, these two pipes are connected to two pressure vessels containing different components of adhesive, supplying different components of adhesive to the nozzle 5. Thus, this dispensing machine can function as either a single-component or a two-component dispensing machine (i.e., an AB dispensing machine). A fifth indicator light L5 is connected between the X5 pin and the power supply, indicating whether the current mode is single-component or two-component.

[0076] The PLC's X6 pin is connected to a second switch SB6, which is used to trigger the PLC to turn the anti-misoperation function on / off. A sixth indicator light L6 is connected between this X6 pin and the power supply; the presence or absence of the anti-misoperation function can be determined via indicator light L6.

[0077] The PLC's Y0 pin is connected to a counter CT1, which can automatically count the number of products that have been dispensed.

[0078] Figure 4 The panel layout of controller 9 is shown. Counter CT1, time relay KT1, power switch SB2, first switch SB3, second switch SB6, third switch SB5, fourth switch SB4, and first to eighth indicator lights L1-L8 are all located on this panel.

[0079] The time relay KT1 has a time setting key on its panel, which can be used to adjust the time value of the time relay KT1.

[0080] In this embodiment, the dispensing machine is controlled by a PLC. The PLC has a reserved interface, allowing for the addition of other control inputs or outputs. The program can be repeatedly erased and rewritten, and the functions of the dispensing machine can be adjusted according to actual needs. It can be connected to automated control equipment. Three dispensing speeds can be achieved by modifying the program. However, this invention is not limited to these limitations.

[0081] The working principle of the above dispensing machine is as follows: After the pressure vessel 1 stores the adhesive, it is connected to an air source to give the adhesive a certain pressure. The outlet of the pressure vessel 1 is divided into two paths. One path goes directly to one inlet of the two-component dispensing valve 4, which is the fast dispensing outlet. The other path goes through the throttle valve 7 and then to the other inlet of the two-component dispensing valve 4, which is the slow dispensing outlet. The nozzle 5 merges the two outlets of the two-component dispensing valve 4 together. The slow dispensing speed can be adjusted by adjusting the throttle valve 7. The controller 9 controls the two solenoid valves F of the two-component dispensing valve 4. The two solenoid valves F control the two cylinders of the two-component dispensing valve 4. The two cylinders drive the two valve cores, thereby controlling the opening and closing of the two valve cores of the two-component dispensing valve 4. When both valve cores are open at the same time, it is fast dispensing. When one valve core is closed and the other valve core (the valve core in the adhesive supply pipeline including the throttle valve 7) is open, it is slow dispensing.

[0082] Understandably, since the dispensing speeds of the two paths are different, the following three dispensing speeds can also be achieved: 1. Controlling one valve core of the two-component dispensing valve 4 to be open and the other valve core to be closed; 2. Controlling one valve core of the two-component dispensing valve 4 to be closed and the other valve core to be open; 3. Controlling both valve cores of the two-component dispensing valve 4 to be open.

[0083] One embodiment of the dispensing method includes the following steps:

[0084] Control the two-component dispensing valve 4 to be in a double-pass state, that is, both valve cores are open, so that the first and second pipes together supply adhesive to the nozzle 5 for rapid dispensing to the product.

[0085] After the rapid dispensing is completed, the two-component dispensing valve 4 is controlled to be in a one-way state, that is, one valve core is open and the other valve core is closed, so that the second pipe 3 supplies adhesive to the nozzle 5 alone and slowly dispenses it to the product.

[0086] Furthermore, before starting dispensing, the operator can adjust the dispensing speed of the slow dispensing process using the throttle valve 7 on the second pipe 3. This allows for operation by operators of varying skill levels and accommodates adhesives with different flowability.

[0087] After activating the anti-misoperation function of the dispensing machine, the dispensing method further includes: before starting dispensing, after receiving the trigger signal from the foot switch SB1, the controller 9 uses the sensor 8 to identify whether there is product on the nozzle 5. When the identification result is no product, the two-component dispensing valve 4 is locked in the closed state; when the identification result is product, the two-component dispensing valve 4 is controlled to enter the dual-pass state and start rapid dispensing. In this way, dispensing will not start if the foot switch SB1 is accidentally triggered.

[0088] After activating the anti-misoperation function of the dispensing machine, the dispensing method further includes: during the dispensing process, the controller 9 uses the sensor 8 to identify whether the product at the nozzle 5 has been removed. When removal is detected, the controller controls the two-component dispensing valve 4 to enter the closed state. Thus, by manually removing the product, dispensing can be stopped. Compared to using a foot switch SB1 to stop dispensing, the method in this embodiment has higher control sensitivity, which is beneficial for accurate dispensing and reduces glue overflow and insufficient glue.

[0089] The dispensing method further includes the following steps: Before dispensing begins, the controller 9 detects whether the quantitative dispensing function is enabled by detecting the first switch SB3. When it is detected that the quantitative dispensing function is enabled, the time relay KT1 is activated to start dispensing. After the time relay KT1 expires, the controller 9 is triggered to stop dispensing.

[0090] The dispensing method further includes the following steps:

[0091] When the controller 9 receives the trigger signal from the foot switch SB1, before starting dispensing, the controller 9 detects the status of the first switch SB3 and the fourth switch SB4 to identify whether the quantitative dispensing function and the quantitative-slow automatic switching function are enabled.

[0092] When the metered dispensing function is detected as enabled and the metered-slow automatic switching function is disabled, the time relay KT1 is activated, and the two-component dispensing valve 4 enters a double-pass state, initiating rapid dispensing. After the time relay KT1 expires, the controller 9 is triggered, controlling the two-component dispensing valve 4 to close, stopping rapid dispensing. Upon receiving the trigger signal from the foot switch SB1 again, the controller 9 controls one valve core of the two-component dispensing valve 4 to close, and the other valve core to briefly open and then close, performing slow dispensing on the product. When the product is removed from the nozzle 5, the sensor 8 sends a trigger signal to the controller 9, controlling the two-component dispensing valve 4 to close, stopping dispensing.

[0093] When both the quantitative dispensing function and the quantitative-slow automatic switching function are detected as being activated, the time relay KT1 is activated, and the two-component dispensing valve 4 enters a double-pass state, initiating rapid dispensing. After the time relay KT1 expires, the controller 9 is triggered, controlling the two-component dispensing valve 4 to enter a single-pass state, automatically switching from rapid dispensing to slow dispensing. In slow dispensing mode, after receiving the trigger signal from the foot switch SB1 again, the controller 9 controls one valve core of the two-component dispensing valve 4 to close, and the other valve core to briefly open and then close, performing slow dispensing on the product. When the product is removed from the nozzle 5, the sensor 8 sends a trigger signal to the controller 9, controlling the two-component dispensing valve 4 to enter a closed state, stopping dispensing.

[0094] Another embodiment of the dispensing method includes: connecting the pipes connected to the two inlets of the two-component dispensing valve 4 to two pressure vessels 1 containing different adhesives; after receiving the trigger signal from the foot switch SB1, the controller 9 controls both valve cores of the two-component dispensing valve 4 to open, dispensing the two different adhesives into the nozzle 5 to achieve AB dispensing.

[0095] This dispensing machine has at least the following characteristics:

[0096] 1. Multiple modes. Existing dispensing machines only offer quantitative dispensing and foot switch control, generally limited to either single-component or two-component adhesives, and have a single speed. This dispensing machine, however, features dual-speed functionality, allowing for on-the-spot speed switching. By simply adding pressure vessel 1, it can switch between single-component and two-component adhesives without requiring equipment replacement.

[0097] 2. Low cost. All components are commercially available general-purpose components, requiring no customization. Furthermore, the equipment has a simple structure and low manufacturing cost.

[0098] 3. Features anti-misoperation function. Existing dispensing machines will cause glue to be discharged from the nozzle if the foot switch is accidentally stepped on or if it is pressed by other objects. If the metered dispensing mode is used, it cannot stop the discharge in time. This dispensing machine adds a sensor 8, which, together with the controller 9, forms an anti-misoperation function. By detecting whether there is product at the nozzle 5, it locks the dispensing valve in the closed state when there is no product. Even if the foot switch SB1 is stepped on, the nozzle 5 will not discharge glue.

[0099] 4. It requires low skill from the operator and can reduce labor intensity.

[0100] When the dosage for each product is consistent, the machine can dispense a precise amount of adhesive without constant monitoring, and it automatically stops after dispensing. When the dosage for each product varies, it uses a precise dispensing function and automatically switches to a slow dispensing function after the precise dispensing is completed. The dispensing time for the precise dispensing is adjusted to ensure that no product overflows, and the remaining portion is filled using slow dispensing. Once filled, the machine moves away from the sensing area and stops working. New users can switch between slow and fast dispensing at any time; simply removing the hand stops the machine, eliminating the need for simultaneous hand and foot coordination.

[0101] 5. Limited operator training time. A novice can learn to operate the machine in 5 minutes, without needing to coordinate hand and foot movements. Existing dispensing machines require at least a day of training, and operation requires hand and foot coordination, which can easily lead to incomplete dispensing or overflow.

[0102] 6. Improves production efficiency. Existing products only have one dispensing speed. Beginners must adjust the speed to a relatively slow level to work, while experienced operators may experience glue overflow when their attention is not focused, requiring subsequent cleaning and increasing operation time. This dispensing machine has two dispensing speeds, allowing for speed control. It can work quickly at the beginning and reduce the dispensing speed in time when the machine is almost full, increasing operator reaction time and reducing subsequent cleaning time.

[0103] 7. Improves product quality. Existing dispensing machines require hand and foot coordination to stop dispensing. Improper coordination can cause some of the dispensed glue to be sucked back, resulting in insufficient glue, or glue to leak onto the product or worktable if the hand is removed too early. This dispensing machine only requires the hand to be removed before it stops working, eliminating the need for simultaneous hand and foot coordination.

[0104] 8. It can act as a buffer. When the colloid has good flowability, excessively fast flow may create waves, causing the colloid to overflow the outer shell when it's almost full. Conversely, when the colloid has poor flowability, excessively fast flow may result in air bubbles not being expelled in time, leading to insufficient colloid after filling. This dispensing machine has two dispensing speeds: a fast dispensing speed followed by a slow dispensing speed to fill the shell. The waves and internal air bubbles generated during the initial fast dispensing speed can be eliminated during the later slow dispensing speed.

[0105] 9. Simple functions. Various functions are switched using a switch located on the controller panel (panel 9), which also features multiple indicator lights for quick operation and intuitive understanding of the equipment's operating status.

[0106] 10. It adopts PLC control, which provides great potential for expansion and upgrades.

[0107] This dispensing machine can be used for single-adhesive dispensing and AB dispensing. It can be used in situations where the amount of adhesive is fixed or inconsistent. It is especially suitable for situations where the amount of adhesive is inconsistent and is also particularly suitable for novice operators.

[0108] The present invention has been described in detail above through specific embodiments. These detailed descriptions are only intended to help those skilled in the art understand the content of the present invention and should not be construed as limiting the scope of protection of the present invention. Various modifications and equivalent transformations made by those skilled in the art to the above solutions under the concept of the present invention should be included within the scope of protection of the present invention.

Claims

1. A manually controlled dispensing machine, characterized in that, include: A pressure vessel used to contain colloids; support; A two-component dispensing valve is mounted on the bracket, the two-component dispensing valve having two inlets and two outlets; Two pipes connect the two glue inlets to the pressure vessel; A glue inlet end is connected to the two glue outlets; Foot switch; as well as The controller, which is electrically connected to the two-component dispensing valve and the foot switch, is used to control the two-component dispensing valve to switch between three states: double-pass, single-pass, and closed. The switching includes, during the dispensing process of a product, first controlling the state of the two-component dispensing valve to the double-pass state, and then controlling the state of the two-component dispensing valve to the single-pass state. The dispensing machine also includes a sensor, which is located on one side below the nozzle. The controller is electrically connected to the sensor to form an anti-misoperation circuit and a dispensing valve state switching circuit. The anti-misoperation circuit is used to prevent the foot switch from accidentally triggering the dispensing process. The dispensing valve state switching circuit is used to control the two-component dispensing valve to enter the closed state after the product or hand is removed from the nozzle during the dispensing process.

2. The manually controlled dispensing machine according to claim 1, characterized in that, One of the two pipes is also equipped with a throttle valve.

3. The manually controlled dispensing machine according to claim 1, characterized in that, The sensor is a diffuse reflection photoelectric switch.

4. The manually controlled dispensing machine according to claim 1, characterized in that, The controller includes a PLC and a time relay. The time relay is electrically connected to the PLC to form a quantitative dispensing circuit, which is used to control the dispensing machine to dispense quantitative amounts of adhesive.

5. The manually controlled dispensing machine according to claim 4, characterized in that, The controller also includes: The first switch, which is electrically connected to the input terminal of the PLC, is used to turn the quantitative dispensing function on / off. The second switch is electrically connected to the input terminal of the PLC and is used to turn the anti-misoperation function on / off. The third switch, which is electrically connected to the input terminal of the PLC, is used to switch between single-component mode and two-component mode. The fourth switch, which is electrically connected to the input terminal of the PLC, is used to turn on / off the quantitative-slow automatic switching function, which is used to automatically switch to slow dispensing after quantitative dispensing is completed.

6. A dispensing method based on the manually controlled dispensing machine of claim 1, characterized in that, Includes the following steps: Controlling the two-component dispensing valve to a dual-flow state allows both pipes to simultaneously supply adhesive to the nozzle, enabling rapid dispensing onto the product; and After the rapid dispensing is completed, the two-component dispensing valve is controlled to be in a one-way state, so that one of the two pipes supplies adhesive to the nozzle alone, and slowly dispenses adhesive to the product. During the dispensing process, the controller uses sensors to identify whether the product or a person's hand has been removed from the nozzle. When removal is detected, the controller controls the two-component dispensing valve to enter the closed state.

7. The dispensing method according to claim 6, characterized in that, The dispensing method further includes the following steps: before starting dispensing, adjusting the throttle valve on the pipeline to obtain the target dispensing speed.

8. The dispensing method according to claim 6, characterized in that, The dispensing method further includes the following steps: Before dispensing begins, the controller receives a trigger signal from the foot switch and uses a sensor to identify whether there is a product or a hand at the nozzle. If the identification result is no product or hand, the two-component dispensing valve is locked in the closed state. If the identification result is yes, the two-component dispensing valve is controlled to enter the dual-pass state and start rapid dispensing.

9. The dispensing method according to claim 6, characterized in that, The dispensing method further includes the following steps: Before dispensing begins, the controller detects the status of the first and fourth switches to identify whether the quantitative dispensing function and the quantitative-slow automatic switching function are enabled. When the quantitative dispensing function is enabled and the quantitative-slow automatic switching function is not enabled, the controller controls the duration of rapid dispensing through a time relay. After the rapid dispensing ends, the controller receives the trigger signal from the foot switch again and controls the two-component dispensing valve to briefly switch to one-way, and then performs slow dispensing on the product. When both the quantitative dispensing function and the quantitative-slow automatic switching function are enabled, the controller controls the duration of rapid dispensing via a time relay. After rapid dispensing ends, the controller controls the two-component dispensing valve to switch to a single-pass state, automatically dispensing the product slowly. In the slow dispensing state, after receiving the trigger signal from the foot switch again, the controller controls the two-component dispensing valve to briefly switch to a single pass state, jogging the product slowly.

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