Stirring head for coating glue stirring equipment

Abstract

The utility model relates to a stirring head for coating glue stirring equipment. The stirring device comprises a main shaft and a plurality of stirring rods, the lower end of the main shaft is coaxially connected with a sleeve, a lifting block is arranged in the sleeve in a sliding mode, a reset spring is connected between the lifting block and the main shaft, and the stirring rods are pivoted to the lifting block in a circumferential array mode. A plurality of open grooves in one-to-one correspondence with the stirring rods are formed in the pipe wall of the sleeve, a limiting ring is further fixedly arranged on the outer wall of the sleeve in a sleeving mode, and the reset spring can push the lifting block to reset downwards, so that all the stirring rods abut against the limiting ring and are overturned upwards to be folded. When the stirrer is just started, the starting resistance is smaller, so that the problem of overlarge load when the motor is started can be obviously improved, and meanwhile, the stirring rod tends to be overturned and unfolded outwards under the action of centrifugal force in a high-speed rotating state, so that the stirring efficiency is ensured.

Description

Technical Field

[0001] This utility model relates to a mixing device, and more particularly to a mixing head for a coating adhesive mixing device. Background Technology

[0002] Coating adhesives are primarily composed of polymeric compounds and are applied to the surfaces of substrates such as paper, fabrics, and films through a coating process, providing adhesion, protection, or functional modification. Common types include water-resistant coating adhesives, acrylic emulsion adhesives, and textile coating adhesives. The production of coating adhesives requires stirring equipment, the core structure of which consists of a motor, transmission components, and a stirring rod. Due to the viscous nature of the coating adhesive, the motor experiences a particularly high load during high-speed rotation, especially during startup. Under high load, the motor's internal wiring harness heats up significantly; therefore, if the motor is frequently subjected to high loads, its lifespan will decrease rapidly.

[0003] So how can we reduce the starting load on the motor? One approach is to gradually increase the motor's speed. This results in a smaller change in the stirring rod's rotational speed, leading to a slower increase in force on the stirring rod and a lower starting load on the motor. However, this requires a soft starter or multi-stage contactor timing control. Another approach is to reduce the size of the stirring rod to decrease stirring resistance, but this will reduce stirring efficiency. Summary of the Invention

[0004] This invention provides a mixing head for an adhesive coating mixing device, which solves the problem in the prior art where the motor load is too high when the mixer starts, affecting its service life.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a stirring head for a glue coating mixing device, comprising a main shaft and a plurality of stirring rods, wherein a sleeve is coaxially connected to the lower end of the main shaft, a lifting block is slidably disposed inside the sleeve, a return spring is connected between the lifting block and the main shaft, the plurality of stirring rods are pivotally connected to the lifting block in a circumferential array, the sleeve wall is provided with a plurality of slots corresponding one-to-one with the stirring rods, and a limiting ring is fixedly sleeved on the outer wall of the sleeve, the return spring can push the lifting block to return downward, so that all the stirring rods abut against the limiting ring and flip upward and retract.

[0006] In its stationary state, the lifting block tends to move downwards under the thrust of the return spring. This causes the stirring rod to move synchronously downwards along the slot. Because a limiting ring is fitted along the path of the slot, when the stirring rod comes into contact with the limiting ring, the stirring rod will flip upwards. Eventually, all the stirring rods will be in an upward-folded, retracted state. In this state, the structure resembles the frame of a folded umbrella. In this state, the outward radius of the structure is small. According to the formula for moment of inertia, when rotating with the same acceleration, the smaller the outward radius, the less torque is required. At the same time, because the outward radius is smaller, the linear velocity of the stirring rod is smaller at the same rotational speed, and the resistance generated by the fluid is also smaller. Therefore, when the structure is driven to rotate by the motor in the retracted state, the starting resistance is much lower than that of a conventional stirring rod, thus significantly reducing the starting load of the motor. As the structure is driven to rotate, the stirring rods tend to flip outwards under the action of centrifugal force. As the rotational speed increases, the centrifugal force increases, thus pushing the lifting block upwards and compressing the return spring until it reaches a balanced state. In summary, this invention has low starting resistance at startup, which can significantly improve the problem of excessive load when the motor starts. At the same time, under high-speed rotation, the stirring rod will tend to flip outward and unfold under the action of centrifugal force, thus ensuring stirring efficiency.

[0007] Furthermore, the inner wall of the sleeve is provided with several guide ribs distributed along its axial direction, and the outer circumferential wall of the lifting block is provided with several slots that slide and engage with the guide ribs. The sliding engagement of the slots with the guide ribs prevents relative rotation between the sleeve and the lifting block, resulting in better overall stability.

[0008] Furthermore, the bottom of the lifting block is provided with a central blind hole, the bottom of which is provided with a threaded hole. The bottom of the lifting block also has several mounting slots for installing the stirring rod. The root of the stirring rod is provided with a rotating shaft. The sides of the mounting slots are also provided with rotating shaft retaining slots for accommodating the rotating shaft. The bottom of the lifting block is also covered with a plug, which can restrict the rotating shaft within the rotating shaft retaining slots. The plug has a positioning block adapted to the central blind hole, and the center of the plug has a bolt hole. A countersunk bolt connects the bolt hole and the threaded hole. By loosening the countersunk bolt, the stirring rod can be easily installed and disassembled, facilitating later debugging or component replacement.

[0009] Therefore, this utility model has the following characteristics compared with the prior art: 1. This utility model has a small starting resistance when it is first started, which can significantly improve the problem of excessive load when the motor starts. At the same time, under the action of centrifugal force, the stirring rod tends to flip outward and unfold, thus ensuring the stirring efficiency. Attached Figure Description

[0010] AppendixFigure 1 This is a schematic diagram of the structure of this utility model when it is rotated and unfolded;

[0011] Appendix Figure 2 This is a schematic diagram of the structure of this utility model when it is stationary and folded up;

[0012] Appendix Figure 3 It is attached Figure 1 A schematic diagram of the structure after removing the spindle and sleeve;

[0013] Appendix Figure 4 This is a structural diagram of the lifting block;

[0014] Appendix Figure 5 It is attached Figure 2 Axial sectional view;

[0015] Appendix Figure 6 This is the installation diagram for the limit ring. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are 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 are not intended to 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.

[0018] Example 1: See Figure 1 , Figure 2 and Figure 5 A mixing head for an adhesive coating mixing device includes a main shaft 10 and four mixing rods 20. A sleeve 30 is coaxially connected to the lower end of the main shaft. A lifting block 40 is slidably disposed inside the sleeve. A return spring 50 is connected between the lifting block and the main shaft. The four mixing rods are pivotally connected to the lifting block in a circumferential array. The sleeve wall has four slots 31 corresponding to the mixing rods. A limiting ring 60 is also fixedly fitted on the outer wall of the sleeve. The return spring can push the lifting block to return downward, so that all the mixing rods abut against the limiting ring and flip upward to retract.

[0019] In this embodiment, in a stationary state, the lifting block tends to move downwards to its stop point under the push of the return spring. This causes the stirring rod to move synchronously downwards along the slot. Because a limiting ring is fitted along the path of the slot, when the stirring rod comes into contact with the limiting ring, the stirring rod will flip upwards. Eventually, all the stirring rods will be in an upward-flipped and retracted state. In this state, this embodiment resembles the frame of an umbrella in its folded state. In this state, the outward radius of this embodiment is small. According to the formula for moment of inertia, when rotating at the same acceleration, the smaller the outward radius, the less torque is required. At the same time, because the outward radius is smaller, the linear velocity of the stirring rod is smaller at the same rotation speed, and the resistance generated by the fluid is also smaller. Therefore, when this embodiment is driven to rotate by the motor in the retracted state, the resistance generated during startup is much lower than that of a conventional stirring rod, thus significantly reducing the starting load of the motor. As this embodiment is driven to rotate, the stirring rods tend to flip outwards and unfold under the action of centrifugal force. As the rotation speed increases, the centrifugal force increases, so the lifting block is pushed upwards and compresses the return spring until it reaches a balanced state. In summary, this embodiment has low starting resistance at startup, which can significantly improve the problem of excessive load when the motor starts. At the same time, under high-speed rotation, the stirring rod will tend to flip outward and unfold under the action of centrifugal force, thus ensuring stirring efficiency.

[0020] See Figure 1 and Figure 4 The inner wall of the sleeve is provided with four guide ribs 32 distributed along its axial direction, and the outer circumference of the lifting block is provided with four slots 41 that slide with the guide ribs. By sliding with the guide ribs through the slots, the sleeve and the lifting block will not rotate relative to each other, thus improving the overall stability.

[0021] See Figure 3 , Figure 4 and Figure 6 The bottom of the lifting block has a central blind hole 42, and the bottom of the central blind hole has a threaded hole 43. The bottom of the lifting block also has four mounting slots 44 for installing the stirring rod. The root of the stirring rod has a rotating shaft 21. The sides of the mounting slots also have rotating shaft retaining slots 45 for accommodating the rotating shaft. The bottom of the lifting block is also covered with a plug 70, which can restrict the rotating shaft in the rotating shaft retaining slot. The plug has a positioning block 71 that matches the central blind hole. The center of the plug has a bolt hole 72, and a countersunk bolt 80 connects the bolt hole and the threaded hole. By loosening the countersunk bolt, the stirring rod can be installed and disassembled relatively easily, which is convenient for later debugging or replacement of parts.

[0022] See Figure 6 The outer wall of the sleeve is provided with an annular groove 33, and at least two countersunk positioning bolts 61 are screwed onto the limiting ring. The inner end of the countersunk positioning bolts engages with the annular groove. When the sleeve needs to be disassembled, it can be removed simply by unscrewing the countersunk positioning bolts.

[0023] See Figure 2 and Figure 5 The outer end of the stirring rod is provided with a stirring blade 22; the lower end of the main shaft is provided with a first flange 11, and the upper end of the sleeve is provided with a second flange 34, the two flanges are connected to each other; the top of the lifting block is provided with a spring mounting part 46.

[0024] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A mixing head for an adhesive coating mixing device, comprising a main shaft and a plurality of mixing rods, characterized in that: The lower end of the main shaft is coaxially connected to a sleeve, and a lifting block is slidably disposed inside the sleeve. A return spring is connected between the lifting block and the main shaft. Several stirring rods are pivotally connected to the lifting block in a circumferential array. Several slots corresponding to the stirring rods are provided on the wall of the sleeve. A limiting ring is also fixedly fitted on the outer wall of the sleeve. The return spring can push the lifting block to return downward, so that all the stirring rods abut against the limiting ring and flip upward to retract.

2. The coating glue stirring device stirring head according to claim 1, characterized in that: The inner wall of the sleeve is provided with several guide ribs distributed along its axial direction, and the outer circumferential wall of the lifting block is provided with several slots that slide with the guide ribs.

3. The coating glue stirring device stirring head according to claim 1 or 2, characterized in that: The bottom of the lifting block is provided with a central blind hole, and the bottom of the central blind hole is provided with a threaded hole. The bottom of the lifting block is also provided with several mounting grooves for installing a stirring rod. The root of the stirring rod is provided with a rotating shaft. The two sides of the mounting groove are also provided with rotating shaft slots for accommodating the rotating shaft. The bottom of the lifting block is also covered with a plug. The plug can restrict the rotating shaft in the rotating shaft slot. The plug is provided with a positioning block that matches the central blind hole. The center of the plug is provided with a bolt hole. A countersunk bolt is connected between the bolt hole and the threaded hole.

4. The coating glue stirring device stirring head according to claim 1, characterized in that: The outer wall of the sleeve is provided with an annular groove, and at least two countersunk positioning bolts are screwed onto the limiting ring, with the inner end of the countersunk positioning bolts engaging with the annular groove.

5. The coating glue stirring device stirring head according to claim 1, characterized in that: The outer end of the stirring rod is equipped with a stirring blade.

6. The coating glue stirring device stirring head according to claim 1, characterized in that: The lower end of the spindle is provided with a first flange, and the upper end of the sleeve is provided with a second flange, and the two flanges are connected to each other.

7. The coating glue stirring device stirring head according to claim 1, characterized in that: The top of the lifting block is equipped with a spring mounting part.

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