A constant temperature control device of a glue dispenser and the glue dispenser

Abstract

The utility model provides a kind of dispensing machine's thermostatic control device, including single screw valve, glue injection needle cylinder, glue outlet needle and at least two temperature control components, glue injection needle cylinder is set on the glue inlet of single screw valve, and both are communicated, for pouring into the quantitative single-component glue to inside;Glue outlet needle is set on the glue outlet of single screw valve, and both are communicated, for extruding glue to outside to carry out dispensing;At least two temperature control components are respectively annularly arranged on the outside of glue injection needle cylinder and glue outlet needle, and both are detachably connected, temperature control component uses indirect heat conduction to heat glue and prevent solidification;The device uses annular heat conduction to heat glue, can make glue more evenly heated, effectively prevent the risk that glue solidifies in cylinder body caused by heating glue directly, guarantee the stability and dispensing quality of dispensing process, simultaneously, it is convenient to maintain single screw valve in later period.

Description

Technical Field

[0001] This utility model relates to the field of dispensing machine technology, and in particular to a constant temperature control device for a dispensing machine and a dispensing machine. Background Technology

[0002] In modern manufacturing, dispensing technology is widely used in many fields such as electronics, automobiles, medical, and aerospace. Its function is to accurately coat, pot, or drip fluids such as adhesives, sealants, and coatings onto specific locations on products to achieve functions such as bonding, sealing, and protection. Among them, electric dispensing valves adopt a single-screw structure and utilize the single-screw volumetric conveying principle. Its core components are the rotor and stator, which form a self-sealing structure. During operation, the rotor rotates directionally in the stator cavity, and the force generated by the rotation realizes the function of conveying the medium.

[0003] A high-speed screw valve for a dispensing machine, disclosed in CN220461170U, includes a dispensing cylinder. A protective sleeve is fixedly connected to the outer surface of the dispensing cylinder. An annular electric heating wire is fixedly connected to the inner ring of the dispensing cylinder. The outer surface of the annular electric heating wire is fixedly connected to the inner ring of the protective sleeve. A connecting plate is fixedly connected to the upper surface of the dispensing cylinder. A power cylinder is fixedly connected to the upper surface of the connecting plate. A servo motor is fixedly installed on the inner top wall of the power cylinder. A bearing ring is fixedly embedded in the upper surface of the connecting plate. A transmission rod is fixedly connected to the inner ring of the bearing ring. A screw plate is fixedly connected to the outer surface of the transmission rod. A dispensing tube is fixedly connected to the bottom end of the dispensing cylinder. The bottom end of the screw plate extends into the interior of the dispensing tube.

[0004] The existing dispensing cylinder has a ring-shaped electric heating wire fixedly connected to its inner ring. Firstly, the heat conduction area of ​​the heating wire is small. Directly heating the single-component adhesive with the heating wire may cause the adhesive to solidify inside the cylinder, reducing the stability and quality of the dispensing process. Furthermore, it is not conducive to the subsequent cleaning and maintenance of the single screw valve. Utility Model Content

[0005] In view of this, this utility model proposes a constant temperature control device for a dispensing machine and a dispensing machine in general. The dispensing machine uses a ring-shaped heat conduction method to heat the glue, which can make the glue heat more evenly and effectively prevent the risk of the glue curing in the cylinder due to direct heating. This ensures the stability of the dispensing process and the quality of dispensing. At the same time, it facilitates the maintenance of the single screw valve in the later stage.

[0006] The technical solution of this utility model is achieved as follows: This utility model provides a constant temperature control device for a dispensing machine, including a single screw valve, a dispensing syringe, a dispensing needle, and at least two temperature control components, wherein, The dispensing syringe is installed on the glue inlet of the single screw valve and the two are connected. It is used to pour a certain amount of single-component glue into the valve. The dispensing needle is set on the dispensing port of the single screw valve and the two are connected to each other, and is used to squeeze the glue outward for dispensing. At least two temperature control components are respectively arranged around the outside of the glue injection syringe and the glue dispensing needle, and both can be detachably connected. The temperature control components use indirect heat conduction to heat and keep the glue warm to prevent curing.

[0007] Based on the above technical solutions, preferably, the temperature control component includes a heating element and a heat-conducting element, wherein, The heat-conducting components are detachably connected to the outside of the dispensing syringe and the dispensing needle, and the two abut against each other; The heating element is arranged around the outside of the heat-conducting element, and the inner wall of the heating element abuts against the outer wall of the heat-conducting element; The heating element transfers heat to the adhesive through a ring-shaped heat-conducting component for heating and heat preservation.

[0008] Based on the above technical solutions, preferably, it also includes an AC-DC fixed power supply module, and the at least two temperature control components further include a PID temperature controller, wherein... The input terminal of the AC-DC fixed power supply module is electrically connected to the external AC power supply, and the output terminal of the AC-DC fixed power supply module is electrically connected to the power input terminal of each PID temperature controller to supply power to the PID temperature controller.

[0009] Based on the above technical solutions, preferably, it also includes an AC-DC adjustable power supply module, and the at least two temperature control components further include a relay and an ammeter. The input terminal of the AC-DC adjustable power module is electrically connected to the external AC power supply. The positive terminal of the output terminal of the AC-DC adjustable power module is electrically connected to one end of each ammeter and one end of each relay contact, respectively, for adjusting the output voltage. The other end of each ammeter is electrically connected to one end of the corresponding heating element. The other end of the relay contact is electrically connected to the negative output terminal of the AC-DC adjustable power supply module and the other end of the heating element. The coil of each relay is electrically connected to the output terminal of the corresponding PID temperature controller. The PID temperature controller controls the coil to be energized, causing the relay contacts to close and the heating element to heat.

[0010] Based on the above technical solutions, preferably, the at least two temperature control components further include a temperature sensor, which is disposed on the outside of the heating element, and one end of the temperature sensor is electrically connected to the input terminal of the PID temperature controller for detecting the heating temperature.

[0011] Based on the above technical solutions, preferably, the outer sides of both the glue injection syringe and the glue dispensing needle are provided with a first protrusion. At least two heat-conducting components are respectively sleeved on the outside of the glue injection syringe and the glue dispensing needle, and abut against the first protrusion; The outer side of the heat-conducting component is provided with a second protrusion. The heating component is sleeved on the outer side of the heat-conducting component and abuts against the second protrusion. The end face of the heat-conducting component and the heating component away from the first protrusion is flush. The glue injection syringe and glue dispensing needle are threadedly connected to a positioning component on their outer sides. The positioning component abuts against the end face of the heat-conducting component and the heating component away from the first protrusion, thereby fixing the position of the heat-conducting component and the heating component.

[0012] Based on the above technical solutions, preferably, the heating element is a ceramic heat-conducting ring.

[0013] Based on the above technical solutions, preferably, the heat-conducting component is a copper ring with a height of 40-60mm.

[0014] Based on the above technical solutions, preferably, the AC-DC adjustable power supply module has an input of 220V AC and an output of 3-12V DC.

[0015] Secondly, this utility model also provides a dispensing machine, including a constant temperature control device for the dispensing machine.

[0016] The constant temperature control device and dispensing machine of this utility model have the following advantages over the prior art: (1) The glue in the dispensing syringe and dispensing needle is preheated and kept warm by indirect heat conduction through at least two detachable temperature control components that are respectively arranged around the outside of the dispensing syringe and dispensing needle. The heat conduction area is large and the glue is heated more evenly. This effectively prevents the risk of glue curing in the syringe caused by direct heating, ensuring the stability of the dispensing process and the quality of dispensing. At the same time, it is easy to disassemble and facilitates the maintenance of the single screw valve in the later stage. (2) By sensing the heating rise rate of the heating element and the current value monitored by the ammeter in real time through the temperature sensor, the voltage value output by the AC-DC adjustable power module can be adjusted, thereby accurately controlling the heating power of the heating element and adjusting the temperature rise rate. (3) By cooperating with the first protrusion, the second protrusion and the positioning component, the position of the heat-conducting component and the heating component can be fixed on the outside of the glue injection syringe and the glue dispensing needle, which effectively prevents the heat-conducting component and the heating component from shifting or loosening during operation, ensuring the stability and reliability of the entire temperature control component structure. At the same time, when the temperature control component needs to be maintained, the heat-conducting component and the heating component can be easily removed by simply loosening the positioning component, which improves the maintainability and ease of use of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the constant temperature control device for the dispensing machine of this utility model; Figure 2 This is a side view of the dispensing syringe of the constant temperature control device for the dispensing machine of this utility model; Figure 3 This is a block diagram illustrating the principle of the temperature control component in the constant temperature control device of the dispensing machine of this utility model. Figure 4 This is a circuit diagram of the temperature control component of the constant temperature control device for the dispensing machine of this utility model. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1-4 As shown, the present invention discloses a constant temperature control device for a dispensing machine, comprising a single screw valve 1, a dispensing syringe 2, a dispensing needle 3, and at least two temperature control components 4. The dispensing syringe 2 is disposed on the glue inlet of the single screw valve 1 and the two are connected, for dispensing a fixed amount of single-component glue into it; the dispensing needle 3 is disposed on the glue outlet of the single screw valve 1 and the two are connected, for dispensing the glue outward; the at least two temperature control components 4 are respectively arranged around the outside of the dispensing syringe 2 and the dispensing needle 3, and both are detachably connected. The temperature control components 4 use indirect heat conduction to heat and keep the glue warm to prevent curing.

[0021] It should be noted that a fixed amount of single-component adhesive is poured into the dispensing syringe 2, which is connected to the glue inlet of the single screw valve 1. The adhesive is then extruded through the dispensing needle 3, which is connected to the glue outlet of the single screw valve 1. During this process, at least two detachable temperature control components 4, which are respectively arranged around the outside of the dispensing syringe 2 and the dispensing needle 3, use indirect heat conduction to preheat and keep the adhesive in the dispensing syringe 2 and the dispensing needle 3. This effectively prevents the adhesive from curing, ensures the smoothness and stability of the dispensing process, and improves the dispensing quality. Furthermore, the detachable connection of the temperature control components 4 facilitates maintenance and replacement.

[0022] In this embodiment, the temperature control component 4 includes a heating element 41 and a heat-conducting element 42. The heat-conducting element 42 is detachably connected to the outside of the glue injection syringe 2 and the glue dispensing needle 3, and the two abut against each other. The heating element 41 is arranged around the outside of the heat-conducting element 42, and the inner wall of the heating element 41 abuts against the outer wall of the heat-conducting element 42. The heating element 41 heats and transfers heat to the glue through the heat-conducting element 42 in a ring for heating and heat preservation.

[0023] It should be noted that when the heating element 41 is energized, the heat generated is directly transferred to the heat-conducting element 42 in contact with it. The heat-conducting element 42 conducts heat evenly to the glue in the dispensing syringe 2 and the dispensing needle 3 through a ring-shaped conduction method, thereby achieving heating and heat preservation of the glue. The detachable design facilitates the cleaning and maintenance of the single screw valve 1 in the later stage. Moreover, the ring-shaped heat transfer of the heat-conducting element 42 can make the glue heat more evenly, effectively preventing the risk of the glue curing in the cylinder due to direct heating, thus ensuring the stability of the dispensing process and the dispensing quality.

[0024] This embodiment also includes an AC-DC fixed power supply module 5, and the at least two temperature control components 4 further include PID temperature controllers 43. The input terminal of the AC-DC fixed power supply module 5 is electrically connected to the external AC power, and the output terminal of the AC-DC fixed power supply module 5 is electrically connected to the power input terminal of each PID temperature controller 43 to supply power to the PID temperature controller 43.

[0025] It should be noted that in this embodiment, external AC power is connected to the input terminal of the AC-DC fixed power supply module 5. After conversion processing by this module, a suitable DC power is output from its output terminal. The AC-DC fixed power supply module 5 receives 220V three-phase AC power as input and outputs a fixed 24V DC power. This DC power is then supplied to the power input terminals of the PID temperature controllers 43 in at least two temperature control components 4, providing a stable power supply to the PID temperature controllers 43. The PID temperature controllers 43 then precisely control the working state of the associated heating element 41 according to preset temperature parameters, thereby adjusting the degree of heating and heat preservation of the adhesive. The AC-DC fixed power supply module 5 provides a stable and reliable DC power supply to the PID temperature controllers 43, ensuring that the PID temperature controllers 43 can operate continuously and accurately. This helps maintain a constant temperature environment for the adhesive, preventing the adhesive from curing due to inaccurate temperature control caused by power fluctuations, and ensuring the stability of the dispensing machine's constant temperature control device and the dispensing quality.

[0026] The PID temperature controller 43 in this embodiment can be model WK7016C1.

[0027] This embodiment also includes an AC-DC adjustable power supply module 6. The at least two temperature control components 4 further include relays 44 and ammeters 45. The input terminal of the AC-DC adjustable power supply module 6 is electrically connected to external AC power. The positive terminal of the output terminal of the AC-DC adjustable power supply module 6 is electrically connected to one end of each ammeter 45 and one end of the contact of each relay 44, respectively, for adjusting the output voltage. The other end of each ammeter 45 is electrically connected to one end of the corresponding heating element 41. The other end of the contact of the relay 44 is electrically connected to the negative terminal of the output terminal of the AC-DC adjustable power supply module 6 and the other end of the heating element 41, respectively. The coil of each relay 44 is electrically connected to the output terminal of the corresponding PID temperature controller 43. The PID temperature controller 43 controls the coil to be energized, causing the contacts of the relay 44 to close, so that the heating element 41 can be heated.

[0028] It should be noted that external AC power is connected to the input terminal of the AC-DC adjustable power module 6. This module can adjust the output voltage. Its positive output terminal is connected to one end of each ammeter 45 and one end of the contact of each relay 44. The AC-DC adjustable power module 6 inputs 220V AC power and outputs 3-12V DC voltage. The other end of the ammeter 45 is connected to one end of the corresponding heating element 41. The other end of the relay 44 contact is connected to both the negative output terminal of the AC-DC adjustable power module 6 and the other end of the heating element 41. The coil of each relay 44 is connected to the output terminal of the corresponding PID temperature controller 43. When the PID temperature controller 43 detects that the temperature is lower than the set value, its output terminal energizes the coil of the relay 44, causing the relay 44 contacts to close, the circuit to conduct, and the AC-DC adjustable power module 6 supplies power to the heating element 41 to heat it. The ammeter 45 can monitor the operating current of the heating element 41 in real time. It should be noted that the AC-DC adjustable power module 6 can flexibly adjust the output voltage according to actual needs, and precisely control the heating power of the heating element 41, thereby adjusting the temperature rise rate; the relay 44 realizes the on and off of the circuit under the control of the PID temperature controller 43, and precisely controls the heating process; the ammeter 45 can monitor the current in real time, which is convenient for monitoring the temperature rise rate of the heating element 41, and can more accurately maintain the glue temperature, effectively prevent the glue from curing, and ensure the dispensing quality and stability.

[0029] In this embodiment, at least two temperature control components 4 also include a temperature sensor 46. The temperature sensor 46 is disposed on the outside of the heating element 41, and one end of the temperature sensor 46 is electrically connected to the input terminal of the PID temperature controller 43 for detecting the heating temperature.

[0030] It should be noted that the temperature sensor 46 is attached to the outside of the heating element 41 and can sense the temperature around the heating element 41 in real time. The temperature sensor 46 transmits the detected temperature back to the PID temperature controller 43. The PID temperature controller 43 makes adjustments based on the known temperature to effectively control the temperature within a constant temperature range. This ensures that the adhesive is always within a suitable temperature range, effectively avoiding problems such as adhesive curing or performance changes due to excessively high or low temperatures. This greatly improves the quality and stability of dispensing and also enhances the working efficiency and reliability of the entire dispensing machine's constant temperature control device.

[0031] In this embodiment, both the glue injection syringe 2 and the glue dispensing needle 3 have a first protrusion 231 on their outer sides; at least two heat-conducting elements 42 are respectively sleeved on the outer sides of the glue injection syringe 2 and the glue dispensing needle 3, and abut against the first protrusion 231; a second protrusion 232 is provided on the outer side of the heat-conducting element 42, and the heating element 41 is sleeved on the outer side of the heat-conducting element 42, and abuts against the second protrusion 232, with the end faces of the heat-conducting element 42 and the heating element 41 away from the first protrusion 231 being flush; a positioning element 233 is threadedly connected to the outer sides of the glue injection syringe 2 and the glue dispensing needle 3, and the positioning element 233 abuts against the end faces of the heat-conducting element 42 and the heating element 41 away from the first protrusion 231, thereby fixing the position of the heat-conducting element 42 and the heating element 41.

[0032] It should be noted that the positioning part 233, which is connected to the glue injection syringe 2 and the glue dispensing needle 3 by external threads, abuts against the end face of the heat-conducting part 42 and the heating part 41 away from the first protrusion 231, firmly fixing the heat-conducting part 42 and the heating part 41 in the designated position of the glue injection syringe 2 and the glue dispensing needle 3. This effectively prevents the heat-conducting part 42 and the heating part 41 from shifting or loosening during operation, ensuring the stability and reliability of the entire temperature control component 4 structure and ensuring the continuous and stable operation of the heating and heat preservation function. At the same time, the installation and removal of the heat-conducting part 42 and the heating part 41 are more convenient. When the temperature control component 4 needs maintenance, the heat-conducting part 42 and the heating part 41 can be easily removed simply by loosening the positioning part 233, which improves the maintainability and ease of use of the equipment.

[0033] In this embodiment, the heating element 41 is a ceramic heat-conducting ring; the heat-conducting element 42 is a copper ring with a height of 40-60mm.

[0034] Working principle: Remove the glue injection syringe 2 from the single screw valve 1. First, fit the heat-conducting component 42 onto the outside of the glue injection syringe 2 and the glue dispensing needle 3, and abut against the first protrusion 231 to position the heat-conducting component 42. Then, fit the heating component 41 onto the outside of the corresponding heat-conducting component 42, and abut against the second protrusion 232 to position the heating component 41. Finally, thread the positioning component 233 to the glue injection syringe 2 and the glue dispensing needle 3 to fix the position of the heat-conducting component 42 and the heating component 41. Turn on the AC-DC adjustable power module 6 and adjust the output voltage until the current value displayed on the ammeter 44 is 1.5A, then stop adjusting the voltage. Set the operating temperature, upper temperature limit, and lower temperature limit of the PID temperature controller 43; pour the specified amount of single-component adhesive into the dispensing syringe 2, cover it with the pressure cap, and wait for the temperature control component 4 to reach the set operating temperature before starting the dispensing operation. Under the action of the heat preservation group, the adhesive can also maintain a suitable temperature during the dispensing process to prevent curing.

[0035] Secondly, this utility model also provides a dispensing machine, including a constant temperature control device for the dispensing machine.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature control device for a dispensing machine, characterized in that, Includes a single screw valve (1), a dispensing syringe (2), a dispensing needle (3), and at least two temperature control components (4), wherein, The dispensing syringe (2) is set on the glue inlet of the single screw valve (1) and the two are connected to each other, and is used to pour a certain amount of single-component glue into it; The glue dispensing needle (3) is set on the glue outlet of the single screw valve (1) and the two are connected to each other, and is used to squeeze the glue outward for dispensing. At least two temperature control components (4) are respectively arranged around the outside of the glue injection syringe (2) and the glue dispensing needle (3), and both can be detachably connected. The temperature control components (4) use indirect heat conduction to heat and keep the glue warm to prevent curing.

2. The temperature control device for the dispensing machine as described in claim 1, characterized in that: The temperature control component (4) includes a heating element (41) and a heat-conducting element (42), wherein, The heat-conducting component (42) is detachably connected to the outside of the glue injection syringe (2) and the glue dispensing needle (3), and the two abut against each other; The heating element (41) is arranged around the outside of the heat-conducting element (42), and the inner wall of the heating element (41) abuts against the outer wall of the heat-conducting element (42); The heating element (41) heats the adhesive by transferring heat through the heat-conducting element (42) in a ring for heating and heat preservation.

3. The temperature control device for the dispensing machine as described in claim 2, characterized in that: It also includes an AC-DC fixed power supply module (5), and the at least two temperature control components (4) further include a PID temperature controller (43), wherein, The input terminal of the AC-DC fixed power supply module (5) is electrically connected to the external AC power, and the output terminal of the AC-DC fixed power supply module (5) is electrically connected to the power input terminal of each PID temperature controller (43) to supply power to the PID temperature controller (43).

4. The temperature control device for the dispensing machine as described in claim 3, characterized in that: It also includes an AC-DC adjustable power supply module (6), and the at least two temperature control components (4) also include a relay (44) and an ammeter (45). The input terminal of the AC-DC adjustable power module (6) is electrically connected to the external AC power. The positive terminal of the output terminal of the AC-DC adjustable power module (6) is electrically connected to one end of each ammeter (45) and one end of the contact of each relay (44) to adjust the output voltage. The other end of each ammeter (45) is electrically connected to one end of the corresponding heating element (41), and the other end of the contact of the relay (44) is electrically connected to the negative terminal of the output terminal of the AC-DC adjustable power module (6) and the other end of the heating element (41). The coil of each relay (44) is electrically connected to the output terminal of the corresponding PID temperature controller (43). The PID temperature controller (43) controls the coil to be energized so that the contacts of the relay (44) are closed, so that the heating element (41) is heated.

5. The temperature control device for the dispensing machine as described in claim 3, characterized in that: The at least two temperature control components (4) further include a temperature sensor (46), which is disposed on the outside of the heating element (41), and one end of the temperature sensor (46) is electrically connected to the input terminal of the PID temperature controller (43) for detecting the heating temperature.

6. The temperature control device for the dispensing machine as described in claim 2, characterized in that: The outer sides of the glue injection syringe (2) and the glue dispensing needle (3) are both provided with a first protrusion (231). At least two heat-conducting components (42) are respectively sleeved on the outside of the glue injection syringe (2) and the glue dispensing needle (3), and abut against the first protrusion (231); The outer side of the heat-conducting component (42) is provided with a second protrusion (232), and the heating component (41) is sleeved on the outer side of the heat-conducting component (42) and abuts against the second protrusion (232). The end faces of the heat-conducting component (42) and the heating component (41) away from the first protrusion (231) are flush. The glue injection syringe (2) and glue dispensing needle (3) are threadedly connected to a positioning member (233). The positioning member (233) abuts against the end face of the heat-conducting member (42) and the heating member (41) away from the first protrusion (231) to fix the position of the heat-conducting member (42) and the heating member (41).

7. The constant temperature control device for the dispensing machine as described in claim 2, characterized in that: The heating element (41) is a ceramic heat-conducting ring.

8. The temperature control device for the dispensing machine as described in claim 2, characterized in that: The heat-conducting component (42) is a copper ring with a height of 40-60mm.

9. The temperature control device for the dispensing machine as described in claim 4, characterized in that: The AC-DC adjustable power module (6) has a 220V AC input and a 3-12V DC output.

10. A dispensing machine, characterized in that: Including the temperature control device of the dispensing machine as described in any one of claims 1-9.

Images