Cigarette production glue spraying device not prone to blistering and blocking

Abstract

The utility model discloses a cigarette production glue spraying device not prone to blistering and blocking. The cigarette production glue spraying device comprises a glue spraying base, an ejector pin and a nozzle. The ejector pin is arranged in the nozzle, the nozzle is arranged at the lower end of the glue spraying base, a working cavity communicated with the nozzle is formed in the glue spraying base, and an ejector pin driving assembly is arranged in the working cavity and used for driving the ejector pin to do short-distance and high-frequency reciprocating motion in the nozzle in the vertical direction; a side glue inlet channel is further arranged in the glue spraying base, and the side glue inlet channel and the working cavity are mutually independent; and a glue buffering cavity is formed in the nozzle, and the bottom end of the side glue inlet channel communicates with the glue buffering cavity through an inclined flow channel. In order to solve the bubbling problem, a section of glue buffering cavity is formed in the middle of the nozzle, so that most glue can be buffered in the glue buffering cavity, and when the ejector pin moves in a short distance at high frequency, the contact position of the glue surface at the top end and air is relatively smaller than that of a large amount of buffered glue.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette glue spraying, and more specifically to a glue spraying device for cigarette production which is not prone to bubbling and clogging. Background Art

[0002] In cigarette packaging machines, the glue spraying device is one of the key equipment.

[0003] The glue spraying system used in the ZB48 ultra-high-speed packaging machine can spray 2,400 glue dots per minute. It has the advantages of high speed, high frequency and high precision. It is very suitable for intermittent gluing in ultra-high-speed operation and can effectively save glue liquid.

[0004] However, in actual use, if the glue spraying operation is discontinuous or runs for a long period of time, the glue liquid will remain in the narrow and long channel of the glue spraying device, which will easily clog the glue spraying device.

[0005] The main reason at the structural level is that the glue inlet of the glue spraying device is designed at the top, and then enters the working cavity of the ejector from the top. The working cavity is also equipped with adjusting rods, armatures, springs and other supporting structures. The path of the colloid is relatively long. Under long-term working conditions or stagnation of glue spraying, it is easy for the internal moving parts such as the armature, spring and ejector to be hindered from moving due to the adhesion of glue, affecting the movement accuracy and thus affecting normal work.

[0006] To solve this problem, we have proposed an improvement plan for the hydraulic glue spraying device with application number 201911013405.8 and patent name. The main purpose is to place the glue spraying pipeline aside so that the glue enters the nozzle area below from the side and does not connect with the upper action mechanism.

[0007] In the later application process, although the blockage problem was solved, the glue entered the working chamber in the nozzle from the bypass, with air above the working chamber and a small amount of glue below. Under the high-frequency action of the ejector pin, bubbles were easily generated in the small amount of glue due to the stirring effect. The glue had a high viscosity and bubbles were not easy to eliminate. Over time, bubbles were likely to appear on the spraying surface, affecting the spraying quality.

[0008] Therefore, how to provide a glue spraying device that can effectively overcome the foaming problem has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0009] The utility model aims to provide a glue spraying device for cigarette production which is not prone to bubbling and clogging, so as to solve the problems raised in the above-mentioned background technology.

[0010] According to one aspect of the utility model, there is provided a glue spraying device for cigarette production which is not prone to bubbling and clogging, comprising a glue spraying base, an ejector pin and a nozzle;

[0011] The ejector pin is arranged inside the nozzle, and the nozzle is arranged at the lower end of the glue spraying base. A working cavity connected to the nozzle is arranged inside the glue spraying base. An ejector pin driving assembly is arranged inside the working cavity. The ejector pin driving assembly is used to drive the ejector pin to perform short-distance, high-frequency reciprocating motion in the vertical direction in the nozzle, so as to open and close the glue spraying port at the lower end of the nozzle at a high frequency;

[0012] The glue spraying base is also provided with a side glue feeding channel, and the side glue feeding channel is independent of the working cavity;

[0013] A colloid buffer chamber is arranged in the nozzle, and the bottom end of the side-placed glue inlet channel is communicated with the colloid buffer chamber through an inclined flow channel.

[0014] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, the inner diameter of the colloid buffer cavity is more than twice the maximum inner diameter of other areas of the nozzle.

[0015] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, the height of the colloid buffer cavity is less than or equal to half the length of the ejector pin, and the lowest end of the colloid buffer cavity is located above the midpoint of the ejector pin.

[0016] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, the top end of the ejector pin is located above the uppermost end of the colloid buffer cavity.

[0017] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging as described in the utility model, the ejector pin drive assembly includes an armature, an electromagnetic drive unit and a spring, the armature is installed in the glue spraying base and arranged around the working cavity, the armature is connected to the top of the ejector pin and is driven by the electromagnetic drive unit, and the spring is connected between the top of the ejector pin and the glue spraying base and is used for resetting the ejector pin.

[0018] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, a colloid overflow chamber is also provided at the bottom end of the glue spraying base, the colloid overflow chamber is connected to the colloid buffer chamber through an overflow pipe, and a drain port is provided at the bottom end of the colloid overflow chamber.

[0019] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, the side or bottom of the colloid overflow chamber can be opened to form an inspection door.

[0020] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, the inner bottom surface of the colloid overflow cavity is inclined toward the liquid discharge port.

[0021] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, the side glue feeding channel extends to the outside of the side wall of the glue spraying base away from one end of the colloid buffer chamber and is provided with an inspection port.

[0022] Optionally, according to the glue spraying device for cigarette production that is not prone to bubbling and clogging described in the utility model, the inspection port is provided with a sealing plug.

[0023] The utility model has substantial features and progress over the prior art. Specifically, in order to solve the problem of bubbling, the utility model sets a colloid buffer cavity at the center position of the nozzle. The volume of the colloid buffer cavity is much larger than the capacity of the nozzle itself, so that most of the glue can be buffered in the colloid buffer cavity. When the ejector moves at a high frequency and a short distance, the contact position between the glue surface at the top and the air is relatively small compared to the large amount of buffered colloid. Even if bubbling occurs, the impact on the glue spraying action below is relatively small.

[0024] Moreover, since the colloid with bubbles is more likely to exist at the top of the colloid buffer cavity and is not easy to move downward in a large volume of colloid solution, it is not easy to affect the execution of the glue spraying action.

[0025] In addition, the present application stipulates a proportional relationship between the length of the ejector pin and the height of the colloid buffer chamber, so that the colloid can be buffered at a relatively deep depth in the nozzle, and bubbles are not easily moved downward to the nozzle mouth under power drive, thereby not affecting the glue spraying work.

[0026] For the top bubbling area, an overflow pipe and a colloid overflow cavity are also set up to enable the bubbling colloid to flow into the colloid overflow cavity, thereby preventing bubbles from accumulating at the top, which will increase the height and affect the work of the spring above.

[0027] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0029] Figure 1 It is a structural schematic diagram of a glue spraying device for cigarette production that is not prone to bubbling and clogging disclosed in the utility model;

[0030] Figure 2 The utility model discloses an exhaust structure diagram of a glue spraying device for cigarette production which is not prone to bubbling and clogging.

[0031] Description of reference numerals:

[0032] 1. Glue spraying base; 2. Ejector; 3. Ejector drive assembly; 4. Side glue feeding channel; 5. Colloid buffer chamber; 6. Nozzle; 7. Working cavity;

[0033] 11. Colloid overflow chamber; 12. Overflow pipe; 13. Liquid discharge port;

[0034] 31. Armature; 32. Electromagnetic drive unit; 33. Spring. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] according to Figure 1 and Figure 2 As shown, the utility model provides a glue spraying device for cigarette production which is not prone to bubbling and clogging, comprising a glue spraying base 1, an ejector pin 2 and a nozzle 6.

[0041] The ejector pin 2 is arranged inside the nozzle 6, and the nozzle 6 is arranged at the lower end of the glue spraying base 1. The glue spraying base 1 is provided with a working cavity 7 connected with the nozzle 6. The working cavity 7 is provided with an ejector pin driving assembly 3. The ejector pin driving assembly 3 is used to drive the ejector pin 2 to perform short-distance, high-frequency reciprocating motion in the vertical direction in the nozzle 6, so as to open and close the glue spraying port at the lower end of the nozzle 6 at a high frequency.

[0042] The glue spraying base 1 is also provided with a side glue feeding channel 4, which is independent of the working cavity 7. A colloid buffer cavity 5 is provided in the nozzle 6, and the bottom end of the side glue feeding channel 4 is connected to the colloid buffer cavity 5 through an inclined flow channel.

[0043] The colloid enters the nozzle 6 from the side-placed glue inlet channel 4 and the inclined flow channel, and is temporarily stored in the colloid buffer chamber 5 as the colloid flows. By controlling the rhythm of glue spraying and the flow rate of the colloid, the liquid level of the colloid inside the nozzle 6 can be roughly controlled.

[0044] Furthermore, the inner diameter of the colloid buffer chamber 5 is more than twice the maximum inner diameter of other areas of the nozzle 6. The height of the colloid buffer chamber 5 is less than or equal to one-half of the length of the ejector pin 2, the lowest end of the colloid buffer chamber 5 is located above the midpoint of the ejector pin 2, and the top of the ejector pin 2 is located above the uppermost end of the colloid buffer chamber 5. In implementation, by increasing the area of ​​the colloid buffer chamber 5, it is ensured that enough glue can be cached in the colloid buffer chamber 5. As the dispensing work proceeds, the ejector pin 2 moves at a high frequency in the colloid, wherein the local area of ​​the top end carries part of the colloid to rise above the liquid surface during the high-frequency movement due to contact with the air, and is easily brought into the air during the falling process, generating bubbles. Under this structure, due to the design of increasing the diameter of the colloid buffer chamber 5, the top end liquid surface tension is greater, and less colloid is taken away from the liquid surface, which can reduce the generation of bubbles, but cannot eliminate them.

[0045] Due to the large liquid surface area, a small amount of bubbles can easily spread out and are not easy to accumulate to produce a cumulative gain effect, further reducing the probability of bubble generation.

[0046] Because the distance between the liquid surface and the lower glue spray port is long enough and the colloid buffer volume is large, bubbles are not easily transferred to the glue spray port under short-distance and high-frequency movement, but are easily dispersed around, thus avoiding the generated bubbles from entering the glue spray port and affecting the glue spraying effect.

[0047] Furthermore, the ejector drive assembly 3 includes an armature 31, an electromagnetic drive unit 32 and a spring 33. The armature 31 is installed in the glue spraying base 1 and is arranged around the working cavity 7. The armature 31 is connected to the top of the ejector 2 and is driven by the electromagnetic drive unit 32. The spring 33 is connected between the top of the ejector 2 and the glue spraying base 1 and is used to reset the ejector 2.

[0048] The ejector pin 2 is lifted up a short distance by the force of the electromagnetic drive unit 32 and the armature 31, and the glue spraying port at the bottom end of the nozzle 6 is opened to spray the glue. The electromagnetic drive unit 32 is powered off. Under the action of the restoring force of the spring 33, the ejector pin 2 closes the glue spraying port at the lower end. The electromagnetic drive unit 32 is powered on and off at a high frequency, so that high-frequency dispensing can be achieved.

[0049] Furthermore, if Figure 2 As shown, the bottom end of the glue spraying base 1 is also provided with a colloid overflow chamber 11, which is connected to the colloid buffer chamber 5 through an overflow pipe 12, and a drain port 13 is provided at the bottom end of the colloid overflow chamber 11. The side or bottom of the colloid overflow chamber 11 can be opened to form an inspection door.

[0050] In order to solve the problem of bubble accumulation under long-cycle operation, a colloid overflow chamber 11 is set next to it. Bubbles tend to accumulate on the surface of the colloid. Through the overflow chamber and the overflow pipe 12, the colloid containing bubbles is drained out in time to prevent the height of the colloid bubbles from increasing after accumulation, which affects the operation of the spring 33.

[0051] The colloid overflow chamber 11 is easier to open and clean than the nozzle 6. During long-cycle operation, the short-cycle beat idle time can be selected for cleaning.

[0052] Furthermore, the inner bottom surface of the colloid overflow chamber 11 is inclined toward the discharge port 13. In practice, the discharge port 13 is the lowest point of the colloid overflow chamber 11, so that the bubble glue discharged through the overflow pipe 12 can be discharged from the discharge port 13 smoothly.

[0053] Furthermore, one end of the side glue inlet channel 4 away from the colloid buffer chamber 5 extends to the outside of the side wall of the glue spraying base 1, and is provided with an inspection port, and the inspection port is provided with a sealing plug. Under normal operation, the inspection port is sealed by the sealing plug to prevent air from entering the colloid buffer chamber 5 along the inspection port and the side glue inlet channel 4.

[0054] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A glue spraying device for cigarette production which is not prone to bubbling and clogging, characterized in that: Including glue spraying base, ejector pin and nozzle; The ejector pin is arranged inside the nozzle, and the nozzle is arranged at the lower end of the glue spraying base. A working cavity connected to the nozzle is arranged inside the glue spraying base. An ejector pin driving assembly is arranged inside the working cavity. The ejector pin driving assembly is used to drive the ejector pin to perform short-distance, high-frequency reciprocating motion in the vertical direction in the nozzle, so as to open and close the glue spraying port at the lower end of the nozzle at a high frequency; The glue spraying base is also provided with a side glue feeding channel, and the side glue feeding channel is independent of the working cavity; A colloid buffer chamber is arranged in the nozzle, and the bottom end of the side-placed glue inlet channel is communicated with the colloid buffer chamber through an inclined flow channel.

2. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 1 is characterized in that: The inner diameter of the colloid buffer cavity is more than twice the maximum inner diameter of other areas of the nozzle.

3. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 2 is characterized in that: The height of the colloid buffer cavity is less than or equal to one half of the length of the ejector pin, and the lowest end of the colloid buffer cavity is located above the midpoint of the ejector pin.

4. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 3 is characterized in that: The top end of the ejector pin is located above the uppermost end of the colloid buffer cavity.

5. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 1, characterized in that: The ejector drive assembly includes an armature, an electromagnetic drive unit and a spring. The armature is installed in the glue spraying base and arranged around the working cavity. The armature is connected to the top of the ejector and is driven by the electromagnetic drive unit. The spring is connected between the top of the ejector and the glue spraying base and is used for resetting the ejector.

6. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to any one of claims 1 to 5, characterized in that: The bottom end of the glue spraying base is also provided with a colloid overflow cavity, the colloid overflow cavity is connected with the colloid buffer cavity through an overflow pipe, and the bottom end of the colloid overflow cavity is provided with a liquid discharge port.

7. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 6, characterized in that: The side or bottom of the colloid overflow chamber can be opened to form an inspection door.

8. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 7, characterized in that: The inner bottom surface of the colloid overflow cavity is inclined toward the liquid discharge port.

9. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 1, characterized in that: The side glue inlet channel extends from one end of the colloid buffer chamber to the outside of the side wall of the glue spraying base and is provided with an inspection port.

10. The glue spraying device for cigarette production that is not prone to bubbling and clogging according to claim 9, characterized in that: The inspection port is provided with a sealing plug.

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