Filling nozzle capable of quantitatively outputting hot melt adhesive

Abstract

The utility model discloses a filling nozzle capable of quantitatively outputting hot melt adhesive, which comprises a dripping nozzle valve body, a storage space is arranged in the dripping nozzle valve body, and a feeding groove and a discharging groove are communicated through a feeding and discharging conversion space. The switching rod is arranged in the switching space and provided with a feeding channel, a discharging channel and an air blowing channel, and switching of feeding and discharging is achieved through driving of the rotary air cylinder. The push-and-pull air cylinder is connected with the push-and-pull shaft and controls suction and pressure feeding of materials in the material storage space. During feeding, the push-pull shaft ascends, and the conversion rod rotates to enable the feeding channel to be communicated with the material conveying groove and the material storage space; during discharging, the push-pull shaft descends, and the discharging channel is communicated with the material storage space and the material dripping groove; during cleaning, high-pressure gas is introduced into the gas blowing channel to blow residual materials. Through accurate channel switching and air cylinder control, high-precision quantitative filling is achieved, the hot melt adhesive filling nozzle is suitable for various hot melt adhesives, the sealing performance is excellent, cleaning is convenient and fast, the problems that a traditional filling nozzle is single in medium, large in quantitative error, liquid leakage and the like are effectively solved, and the hot melt adhesive filling nozzle is suitable for various industrial scenes.

Description

Technical Field

[0001] This utility model relates to a filling nozzle for quantitative dispensing of hot melt adhesive, belonging to the field of dripping equipment. Background Technology

[0002] Existing hot melt adhesive filling nozzle devices are widely used in quantitative filling processes in industries such as pharmaceuticals and chemicals. Common filling nozzle structures generally include components such as a cavity, push-pull rod, nozzle, and cylinder. During the filling process, the cylinder controls the opening or closing of the nozzle seal to achieve the output and stop of the hot melt paste material. However, this type of structure has the following problems:

[0003] 1. Limited media types: Traditional filling nozzle structures are mostly used for filling liquid media and cannot adapt to materials such as hot melt pastes that require heating to maintain a fluid state.

[0004] 2. Large quantitative error: The quantitative process depends on the push-pull stroke and time, but because the speed at which the liquid enters the cavity is not synchronized with the push-pull action, the output error fluctuates greatly.

[0005] 3. Poor sealing performance: The sealing structure is often a combination of a plug and a conical surface. The sealing effect is greatly affected by the machining accuracy and leakage is likely to occur. Utility Model Content

[0006] The purpose of this invention is to provide a filling nozzle for quantitative dispensing of hot melt adhesive, which can effectively solve the above-mentioned problems.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] The device includes a drip valve body with a storage space, wherein a feeding trough and a discharging trough are provided in the storage space; wherein, below the storage space, there is an inlet / outlet conversion space connected to the feeding trough and the discharging trough, and a conversion rod is provided in the inlet / outlet conversion space, wherein a feeding channel and a discharging channel are provided on the conversion rod, and a dripping trough and a conveying trough are provided in the inlet / outlet conversion space.

[0009] Preferably, the feeding channel includes a first feeding trough and a second feeding trough connected to the first feeding trough. Both the first feeding trough and the second feeding trough are cylindrical troughs with perpendicular axes.

[0010] Preferably, the discharge channel extends through the conversion rod, and the discharge channel is a cylindrical groove with its axis parallel to the axis of the first feed groove.

[0011] Preferably, both the discharge trough and the drip trough are cylindrical troughs with their axes coinciding.

[0012] Preferably, a push-pull cylinder is provided at the upper end of the drip valve body, and a push-pull shaft is connected to the piston end of the push-pull cylinder. The push-pull shaft is slidably disposed in the storage space.

[0013] Preferably, a rotary cylinder is provided on one side of the drip valve body. The rotary cylinder is fixed to one side of the drip valve body by a mounting bracket, and the piston end of the rotary cylinder is connected to the conversion rod to drive the conversion rod and realize the switching between feeding and discharging.

[0014] Preferably, the conversion rod is further provided with an air blowing channel, the air blowing channel including a first air groove disposed at the end of the conversion rod and a second air groove communicating with the first air groove.

[0015] The beneficial effects are:

[0016] 1. The drip valve body is designed as an integrated unit. The sealing pressure plate, sealing end cap and sealing ring are used together to ensure the sealing effect of the drip valve body.

[0017] 2. The drip valve body is designed with heating holes and temperature control holes, which can realize heating and temperature control of the drip valve body;

[0018] 3. The rotating shaft features a double-hole design. The cylinder drives the rotating shaft to achieve misaligned connection between the drip valve body and the input pipe port, and between the drip valve body and the nozzle, enabling switching between feeding and discharging.

[0019] 4. The rotating shaft is designed with an air inlet. After each medium output is completed, high-pressure gas blows through the air inlet of the rotating shaft to clean the nozzle and prevent the leakage of residual medium. Attached Figure Description

[0020] For ease of explanation, this utility model is described in detail below with reference to the specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a drawing of the drip valve body part of this utility model;

[0023] Figure 3 This is a cross-sectional view of the drip valve body of this utility model;

[0024] Figure 4 This is a perspective view of the conversion rod of this utility model;

[0025] Figure 5 This is a diagram showing the feeding process of this utility model.

[0026] Figure 6 This is a perspective view of the conversion rod during feeding according to this utility model;

[0027] Figure 7This is a diagram showing the material discharge state of this utility model;

[0028] Figure 8 This is a perspective view of the conversion bar during material discharge of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Dropper valve body; 2. Material storage space; 3. Feeding trough; 4. Discharge trough; 5. Inlet / outlet conversion space; 6. Conversion rod; 7. Feeding channel; 71. First feed trough; 72. Second feed trough; 8. Discharge channel; 9. Dropping trough; 10. Conveying trough; 11. Push-pull cylinder; 12. Push-pull shaft; 13. Rotary cylinder; 14. Air blowing channel; 141. First venting groove; 142. Second venting groove; 15. Heating hole; 16. Detection hole. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0034] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] See Figure 1-8 This is one embodiment of a filling nozzle for quantitative dispensing of hot melt adhesive according to the present invention, which is used for quantitative filling of liquid or hot melt paste materials in the pharmaceutical, chemical and other industries.

[0036] like Figure 1As shown, the device includes a drip valve body 1, which is made of corrosion-resistant, high-temperature-resistant metal or high-strength steel. The drip valve body 1 has an internal storage space 2, a cylindrical cavity of moderate volume, used for temporary storage of materials to be filled, such as liquid pharmaceuticals or hot-melt pastes. The inner wall of the storage space 2 is polished to reduce material adhesion and ensure smooth flow. At the lower end of the storage space 2, a feeding trough 3 and a discharging trough 4 are provided, serving as channels for material input and output, respectively. A heating hole 15 and a detection hole 16 are also provided on the drip valve body 1. An electric heating rod can be installed in the heating hole 15 to heat the hot-melt adhesive material in the storage space 2 of the drip valve body 1. A temperature sensor is installed in the detection hole 16 to sense the temperature of the hot-melt adhesive in the storage space 2. Heating is stopped when a predetermined temperature is reached.

[0037] like Figure 3 As shown, the material storage space 2 is connected to the inlet / outlet conversion space 5 via the feeding trough 3 and the discharge trough 4. The inlet / outlet conversion space 5 is a cylindrical cavity, and a conversion rod 6 is installed inside it. The conversion rod 6 is a cylindrical component that fits with the inlet / outlet conversion space 5 with a clearance fit. Sealing pressure plates are installed at both ends of the inlet / outlet conversion space 5 to ensure good sealing performance.

[0038] The conversion rod 6 is machined with a feeding channel 7, a discharging channel 8, and an air blowing channel 14 to realize the functions of material feeding, discharging, and channel cleaning. The inlet / outlet conversion space 5 is also equipped with a drip trough 9 and a conveying trough 10, which are used for material output and input, respectively. The drip trough 9 is located at the lower end of the drip valve body 1 and is aligned with the external filling container; the conveying trough 10 is located at the front end of the drip valve body 1 and is connected to the external feed pipeline.

[0039] Specifically, the feeding channel 7 consists of a first feeding trough 71 and a second feeding trough 72, both of which are cylindrical troughs with their axes perpendicular to each other. The first feeding trough 71 is arranged radially along the conversion rod 6, and the second feeding trough 72 is arranged axially along the conversion rod 6. The two are connected by an intersection point to form an L-shaped channel, ensuring that the material smoothly enters the storage space 2 from the conveying trough 10. The discharge channel 8 is a cylindrical trough that passes through the conversion rod 6, with its axis parallel to the axis of the first feeding trough 71. The upper and lower ends of the channel are aligned with the discharge trough 4 and the dripping trough 9, respectively, for the directional output of the material. The discharge trough 4 and the dripping trough 9 are both cylindrical troughs with their axes coinciding to reduce material flow resistance and ensure the stability and sealing of the discharge process.

[0040] like Figure 1As shown, a push-pull cylinder 11 is installed at the upper end of the drip valve body 1. The push-pull cylinder 11 is fixed to the top of the drip valve body 1 by bolts, and its piston end is connected to a push-pull shaft 12. The push-pull shaft 12 is a cylindrical rod with a smooth surface, which is slidably disposed in the storage space 2. Its lower end is provided with a sealing gasket that matches the inner wall of the storage space 2 to prevent material leakage. The push-pull cylinder 11 is driven by an external air source to control the push-pull shaft 12 to move up and down in the storage space 2, thereby adjusting the pressure and volume of the storage space 2 to realize the suction and conveying of materials.

[0041] A rotary cylinder 13 is installed on one side of the drip valve body 1, and the rotary cylinder 13 is fixed to the side wall of the drip valve body 1 by a mounting bracket. The mounting bracket is made of high-strength metal material to ensure the stability of the rotary cylinder 13. The piston end of the rotary cylinder 13 is connected to the end of the conversion rod 6 through a coupling, which can drive the conversion rod 6 to perform precise rotational movement within the feed-discharge conversion space 5. Through the control of the rotary cylinder 13, the conversion rod 6 can switch between the feeding position and the discharge position to achieve precise alignment of the feeding channel 7 and the discharge channel 8.

[0042] To improve the cleaning performance of the device, an air blowing channel 14 is also provided inside the conversion rod 6. The air blowing channel 14 includes a first air vent 141 and a second air vent 142. The first air vent 141 is located at the end of the conversion rod 6 and is connected to an external air source pipeline; the second air vent 142 communicates with the first air vent 141 and extends along the axial direction of the conversion rod 6 to the position of the dripping tank 9. The air blowing channel 14 can be used to introduce high-pressure gas after filling to blow away the material remaining in the dripping tank 9 or the discharge channel 8, preventing the material from solidifying or clogging.

[0043] Work process:

[0044] The filling nozzle of this invention achieves three working states—feeding, discharging, and cleaning—through the coordinated control of a push-pull cylinder 11 and a rotary cylinder 13. The specific operation is as follows: Feeding state (e.g., ...) Figure 5 , Figure 6 (As shown)

[0045] Initial preparation: The storage space 2 is empty or partially empty, the push-pull shaft 12 is in a lower position, and the conversion bar 6 is in the initial position.

[0046] Action execution: Push-pull cylinder 11 receives a control signal and drives the piston to slowly rise the push-pull shaft 12, increasing the volume of the storage space 2 and creating negative pressure, thus creating conditions for material intake. Simultaneously, rotary cylinder 13 starts, driving the conversion rod 6 to rotate to the feeding position, aligning the outlet of the second feed trough 72 with the conveying trough 10 and the inlet of the first feed trough 71 with the feeding trough 3. At this point, the feeding channel 7 forms a connecting path from the conveying trough 10 to the storage space 2.

[0047] Material flow: The conveying trough 10 is connected to an external feeding pipeline. Under negative pressure, the material in the pipeline (such as liquid medicine or hot-melt paste) enters the second feeding trough 72 through the conveying trough 10, and then flows into the storage space 2 through the first feeding trough 71 and the feeding trough 3. The feeding amount is precisely controlled by the upward stroke of the push-pull shaft 12 and the volume of the storage space 2.

[0048] End of state: When the storage space 2 is full or the set feeding amount is reached, the push-pull cylinder 11 stops operating, the push-pull shaft 12 remains in its current position, and the rotary cylinder 13 can selectively rotate the conversion rod 6 to the neutral position to close the feeding channel 7 and prevent material backflow.

[0049] Discharge status (e.g.) Figure 7 , Figure 8 (as shown)

[0050] Initial preparation: The storage space 2 is filled with material, the push-pull shaft 12 is in a high position, and the conversion rod 6 is in a neutral or post-feeding position.

[0051] Action execution: Push-pull cylinder 11 receives a control signal and drives the piston to slowly descend the push-pull shaft 12, compressing the material in the storage space 2, generating positive pressure, and pushing the material to flow towards the discharge trough 4. Simultaneously, rotary cylinder 13 starts, driving the conversion rod 6 to rotate to the discharge position, aligning the upper end of the discharge channel 8 with the discharge trough 4 and the lower end with the dripping trough 9. At this point, the discharge channel 8 forms a connecting path from the storage space 2 to the dripping trough 9.

[0052] Material flow: Under the pressure of the push-pull shaft 12, the material in the storage space 2 enters the discharge channel 8 through the discharge chute 4, and then is discharged to the target container (such as a medicine bottle or chemical container) below through the drip chute 9. The discharge volume is precisely controlled by the downward stroke of the push-pull shaft 12 and the flow capacity of the discharge channel 8.

[0053] End of state: When the material output in the storage space 2 is completed or the set output amount is reached, the push-pull cylinder 11 stops operating, the push-pull shaft 12 remains in its current position, and the rotary cylinder 13 rotates the conversion rod 6 to the neutral position, closing the discharge channel 8 to prevent leakage.

[0054] Cleanliness status:

[0055] Initial preparation: After the filling task is completed, a small amount of material may remain in the storage space 2 and the channel. The push-pull shaft 12 is in a lower position and the conversion rod 6 is in a neutral position.

[0056] Cleaning process: The first ventilation channel 141 is connected to an external high-pressure air source. The external air source (such as compressed air or inert gas) enters the blowing channel 14 through the first ventilation channel 141, and then blows into the gap of the feed-outlet conversion space 5 through the second ventilation channel 142. The gap is filled with high-speed gas, which will eventually be output from the dripping tank 9 to prevent excessively sticky plasters from forming long filaments.

[0057] Status End: After the air blowing is completed, the rotary cylinder 13 rotates the conversion rod 6 to the feeding position, shuts off the air source, and the device enters the standby state to prepare for the next filling task.

[0058] Control logic:

[0059] The push-pull cylinder 11 and rotary cylinder 13 of this device are coordinated and controlled by an external control system (such as a PLC or microcontroller). The control system sets the feeding and discharging amounts according to the filling requirements, and monitors the stroke of the push-pull shaft 12 and the rotation angle of the conversion rod 6 in real time to ensure the synchronization and accuracy of the actions.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A dosing spout for dispensing hot melt adhesive, characterized by: The application relates to a drop valve body (1) comprising a storage space (2), wherein a feeding groove (3) and a discharging groove (4) are arranged in the storage space (2); a feeding-discharging conversion space (5) is communicated with the feeding groove (3) and the discharging groove (4) below the storage space (2); a conversion rod (6) is arranged in the feeding-discharging conversion space (5); a feeding channel (7) and a discharging channel (8) are arranged on the conversion rod (6); and a drop feeding groove (9) and a material conveying groove (10) are arranged in the feeding-discharging conversion space (5).

2. The dosing output hot-melt adhesive filling nozzle according to claim 1, characterized in that: The feeding channel (7) comprises a first feeding groove (71) and a second feeding groove (72) communicated with the first feeding groove (71); the first feeding groove (71) and the second feeding groove (72) are both cylindrical grooves, and the axial lines are perpendicular.

3. The dosing output hot-melt adhesive filling nozzle according to claim 2, characterized in that: The discharging channel (8) penetrates the conversion rod (6), and the discharging channel (8) is a cylindrical groove, and the axial line is parallel to the axial line of the first feeding groove (71).

4. The dosing output hot-melt adhesive filling nozzle according to claim 3, characterized in that: The discharging groove (4) and the drop feeding groove (9) are both cylindrical grooves, and the axial lines coincide.

5. The dosing output hot-melt adhesive filling nozzle according to claim 4, characterized in that: A push-pull air cylinder (11) is arranged at the upper end of the drop valve body (1); a push-pull shaft (12) is connected to the piston end of the push-pull air cylinder (11); and the push-pull shaft (12) is slidably arranged in the storage space (2).

6. The dosing output hot melt adhesive filling nozzle according to claim 1, characterized in that: A rotary air cylinder (13) is arranged on one side of the drop valve body (1); the rotary air cylinder (13) is fixed to one side of the drop valve body (1) through a mounting frame; the piston end of the rotary air cylinder (13) is connected with the conversion rod (6) and used for driving the conversion rod (6) to realize feeding and discharging switching.

7. The dosing output hot-melt adhesive filling nozzle according to claim 1, characterized in that: The conversion rod (6) is further provided with a blowing channel (14); the blowing channel (14) comprises a first air groove (141) arranged at the end of the conversion rod (6) and a second air groove (142) communicated with the first air groove (141).

8. The dosing output hot melt adhesive filling nozzle of claim 1, wherein: The drop valve body (1) is provided with a heating hole (15) and a detection hole (16); an electric heating rod is arranged in the heating hole (15); and a temperature sensor is arranged in the detection hole (16).

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