The subject matter herein generally relates to a glue dispensing device.
Dispensing technology is widely used in various fields such as micro-assembly, bioengineering, and rapid manufacturing. With the rapid development of electronic products, dispensing technology requires higher precision and greater operability.
Pneumatic dispensing is a commonly used dispensing technology. However, after dispensing, the glue tends to be drawn and remains on the product, which seriously affects the subsequent application of the product.
Therefore, there is room for improvement within the art.
Implementations of the present disclosure will now be described, by way of embodiments, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale, and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure.
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings, in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.”
The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series, and the like.
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The second limiting plate 60 is fixedly received in the third receiving groove 13. The second limiting plate 60 is located between the first limiting plate 50 and the driving portion 23. A second through hole 16 is formed to penetrate the second limiting plate 60 and is used for the piston rod 22 to pass through. When the glue dispensing head 11 sucks glue, the driving portion 23 drives the piston 21 to move in a direction away from the dispensing opening 112, and the first limiting plate 50 moves with the piston rod 21 until the first limiting plate 50 abuts against the second limiting plate 60. A distance that the first limiting plate 50 moves upward is limited by the second limiting plate 60, so that a maximum distance between the piston 21 and the dispensing opening 112 is limited, thereby achieving precise control of the glue suction amount of the glue dispensing head 11.
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The rotating shaft 77 rotatably passes through the platform 72 and is connected between the scraper 71 and the second driver 73. In at least one embodiment, the second driver 73 may be located at a side of the platform 72 facing away from the scraper 71. In at least one embodiment, the second driver 73 and the third driver 74 may be motors. Preferably, the second driver 73 may be a servo motor. After the glue dispensing head 11 sucks the glue from the glue storage tank 75, the glue container 10 is driven to move to drive the glue dispensing head 11 to move to the top of the scraper 71, so that the glue outlet plate 14 contacts with the scraper 71. At this time, the second driver 73 drives the scraper 71 to reciprocated around the rotating shaft 77, the scraper 71 will scrape the excess glue liquid at the glue outlet plate 14, thereby improving a flatness of the glue when the glue in the glue dispensing head 11 is combined with the product, and precisely controlling the dispensing volume.
In at least one embodiment, the scraper 71 may be fixed on the platform 72, the glue dispensing head 11 may be driven to reciprocate above the scraper 71 to scrape the excess glue liquid at the glue outlet plate 14.
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In at least one embodiment, in order to detect the liquid level of the glue liquid in the glue storage tank 75, a liquid level sensor 80 may be provided in the glue storage tank 75 for sensing the change of the liquid level of the glue liquid in the glue storage tank 75. In at least one embodiment, a controller (not shown) may be provided, the controller is electrically connected to the liquid level sensor 80 and a switch of the lifting cylinder 78. When the liquid level sensor 80 detects that the liquid level of the glue liquid in the glue storage tank 75 drops, the liquid level sensor 80 transmits a signal to the controller. Then the controller controls the switch of the lifting cylinder 78 to turn on, so that the lifting cylinder 78 drives the wiper 76 to move toward the liquid level of the glue liquid in the glue storage tank 75 to contact with the liquid level of the glue liquid in the glue storage tank 75.
In at least one embodiment, in order to avoid interference between the scraper 71 and the wiper 76 when the scraper 71 moves, the scraper 71 and the wiper 76 are arranged on opposite sides of the platform 72.
When the glue dispensing head 11 need to dispense glue, the driving portion 23 pushes the piston 21 to move toward the dispensing opening 112, so that the distance between the connecting plate 40 and the first limiting plate 50 is gradually reduced, and the elastic member 30 is compressed. In the above process, the elastic member 30 generates a force opposite to the moving direction of the first limiting plate 50 to buffer the driving portion 23 to push the piston 21 to dispense glue, so that the dispensed glue has a buffer time to be gradually formed. That is, when the glue container 10 moves up after dispensing glue, since the dispensed glue has gradually been formed, the drawing of the glue at the dispensing opening 112 can be reduced, and the dispensing quality can be improved.
It is to be understood, even though information and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the present embodiments, the disclosure is illustrative only; changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the present embodiments to the full extent indicated by the plain meaning of the terms in which the appended claims are expressed.
Number | Date | Country | Kind |
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202110511162.1 | May 2021 | CN | national |