Needle head limiting device for automatic dispensing machine
By designing the needle limit device, the contact limit of threaded screw connection and limit steps are used to solve the problem of inconsistent needle coordinates in automatic dispensing machines, and the accuracy of dispensing and product quality are improved.
Patent Information
- Application Number
- CN202421719872.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-19
AI Technical Summary
After the automatic dispenser is reinstalled, the new coordinates of the needle cannot be consistent with the standard coordinates, resulting in poor dispensing or the need for glue replenishment.
A needle limiting device for automatic dispensing machine is designed, including a needle guide, a guide cylinder, a needle limiting part and a limit step. Through the threaded connection and the contact limiting of the limit step, the X, Y, and Z coordinates of the needle are consistent with the standard coordinates.
The adjustment time of needle adjustment is reduced, the dispensing and glue replenishment are avoided, and the accuracy of dispensing and product quality is improved.
Smart Images
Figure CN222918962U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dispensing equipment, in particular to a needle limiting device for an automatic dispenser. Background Art
[0002] Automatic dispensers are widely used in industrial production such as integrated circuits, semiconductor packaging, printed circuit boards, etc. Please refer to the attached Figure 1 , at the bottom of the glue tube 1 of the automatic dispenser, there is a needle 2. During use, the glue tube 1 is installed in the heating cylinder 3 for heating. The needle 2 passes downward through the through hole at the bottom of the heating cylinder 3, so that the heated glue is dispensed onto the product through the needle 2. The volume of the glue tube is limited, and the glue tube needs to be replaced multiple times during the production process. After the new glue tube is reinstalled into the heating cylinder, it is fastened by the locking bolt 5.
[0003] There is a needle program in the automatic dispenser, which defines the standard coordinates (X, Y, Z) of the needle. Since the volume of the heating cylinder is larger than that of the glue tube, and the through hole at the bottom of the heating cylinder is larger than the size of the needle, it is easy for the newly installed needle to tilt, that is, the X, Y, and Z coordinates of the newly installed needle in space cannot be consistent with the standard coordinates, thus affecting the accuracy of the dispensing position and causing product quality problems such as poor dispensing or need for supplementary glue. Currently, the installation of the glue tube and the needle of the automatic dispenser depends entirely on the experience and feeling of the operator. When the needle tilts, it takes time to adjust the machine. Therefore, it is necessary to provide a needle limiting device for an automatic dispenser, which can solve the problem that the new coordinates of the needle cannot be consistent with the standard coordinates after the glue tube and the needle of the automatic dispenser are reinstalled in the prior art. Summary of the Invention
[0004] The purpose of the utility model is to provide a needle limiting device for an automatic dispenser, which can solve the problem that the new coordinates of the needle cannot be consistent with the standard coordinates after the glue tube and the needle of the automatic dispenser are reinstalled in the prior art.
[0005] The utility model is realized as follows:
[0006] A needle limiting device for an automatic dispenser includes a glue tube, a needle, a heating cylinder, and a needle guide. The glue tube is inserted into the heating cylinder of the automatic dispenser, and the needle at the bottom of the glue tube passes downward through the through hole at the bottom of the heating cylinder. An internal thread is formed in the through hole at the bottom of the heating cylinder, and an external thread matching the internal thread is formed on the needle guide, so that the needle guide is rotatably connected to the through hole in a matching manner, and the needle guide can abut against the bottom surface of the heating cylinder, and the needle passes through the needle guide in a matching manner.
[0007] The described needle guide includes a guide cylinder, a needle limiting part, and a limiting step; an external thread is formed on the outer wall of the guide cylinder so that the guide cylinder is rotationally connected to the through hole in a matching manner; the needle limiting part is arranged at the bottom of the guide cylinder, and a cavity for the needle to penetrate through is formed between the needle limiting part and the guide cylinder; the limiting step is circumferentially formed on the outer edge of the connection between the guide cylinder and the needle limiting part, and the top surface of the limiting step can abut against the bottom surface of the heating cylinder.
[0008] The described guide cylinder, needle limiting part, and limiting step are of an integral structure.
[0009] The described guide cylinder, needle limiting part, and limiting step are coaxially arranged.
[0010] The described rubber tube includes a rubber tube body and a needle mounting part located at the bottom of the rubber tube body and used for mounting the needle. When the limiting step abuts against the bottom surface of the heating cylinder, the top surface of the guide cylinder, the top surface of the through hole, and the connection between the rubber tube body and the needle mounting part are flush.
[0011] The inner diameter of the cavity of the described guide cylinder is larger than the diameter of the needle mounting part, so that the needle mounting part is inserted into the guide cylinder in a matching manner.
[0012] The inner diameter of the cavity of the described needle limiting part is larger than the diameter of the needle, so that the needle is inserted into the needle limiting part in a matching manner.
[0013] The described needle limiting part has an inverted conical structure, and the top diameter of the limiting step is smaller than the diameter of the guide cylinder.
[0014] Compared with the prior art, the present utility model has the following beneficial effects:
[0015] 1. Since the present utility model is provided with a needle guide, the guide cylinder is rotationally connected to the through hole of the heating cylinder, and the consistency between the X and Y coordinates of the newly installed needle and the standard coordinates is ensured by the matching penetration of the needle in the needle guide. At the same time, the abutting limit of the limiting step on the bottom surface of the heating cylinder is used to limit the consistency between the Z coordinate of the newly installed needle and the standard coordinates, which is beneficial to reducing the machine adjustment time for needle adjustment and avoiding the occurrence of poor dispensing and glue replenishment.
[0016] 2. Since the present utility model is provided with a needle guide, the needle guide is installed on the heating cylinder by means of threaded rotation, and the threaded engagement can ensure the stability and coaxiality of the installation, which is beneficial to the precise limitation of the needle, and is convenient and fast to disassemble and assemble, and can be applied to various forms of automatic dispensing machines. Description of the Drawings
[0017] Figure 1 It is a sectional view of the installation of the rubber tube and the needle of the prior art in the heating cylinder;
[0018] Figure 2It is an installation sectional view of the needle limiting device for the automatic dispensing machine of the present utility model. Among them, (a) is the sectional view before replacing the new rubber tube and needle, and (b) is the sectional view after replacing the new rubber tube and needle;
[0019] Figure 3 It is the front view of the needle guiding member in the needle limiting device for the automatic dispensing machine of the present utility model.
[0020] In the figure, 1 is the rubber tube, 11 is the rubber tube body, 12 is the needle mounting part, 2 is the needle, 3 is the heating cylinder, 31 is the through hole, 32 is the internal thread, 4 is the needle guiding member, 40 is the external thread, 41 is the guiding cylinder, 42 is the needle limiting part, 43 is the limiting step, and 5 is the locking bolt. Specific implementation mode
[0021] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0022] Please refer to the attached Figure 2 , A needle limiting device for an automatic dispensing machine includes a rubber tube 1, a needle 2, a heating cylinder 3 and a needle guiding member 4; the rubber tube 1 is inserted into the heating cylinder 3 of the automatic dispensing machine, and the needle 2 at the bottom of the rubber tube 1 passes downward through the through hole 31 at the bottom of the heating cylinder 3; an internal thread 32 is formed in the through hole 31 at the bottom of the heating cylinder 3, and an external thread 40 matching the internal thread 32 is formed on the needle guiding member 4, so that the needle guiding member 4 is screwed and connected in the through hole 31, and the needle guiding member 4 can abut against the bottom surface of the heating cylinder 3, and the needle 2 passes through the needle guiding member 4 in a matching manner.
[0023] The needle guiding member 4 is manufactured according to the standard coordinates in the needle program of the automatic dispensing machine and the dimensions of the rubber tube 1 and the needle 2. The needle guiding member 4 is screwed and connected to the through hole 31 installed on the heating cylinder 3, as shown in the attached Figure 2 (a), and it can be applied to various forms of automatic dispensing machines. When replacing the rubber tube 1 and the needle 2, the needle 2 passes through the needle guiding member 4 in a matching manner, as shown in the attached Figure 2 (b), which is used to limit the X and Y coordinates of the needle 2. At the same time, through the abutting limit of the needle guiding member 4 and the bottom surface of the heating cylinder 3, it is used to limit the Z coordinate of the needle 2, so that the coordinates of the newly installed needle 2 are consistent with the standard coordinates, avoiding unnecessary machine adjustment time and quality problems such as poor dispensing and glue replenishment.
[0024] Please refer to the attached Figure 3, the described needle guide 4 includes a guide cylinder 41, a needle limiting portion 42, and a limiting step 43; an external thread 40 is formed on the outer wall of the guide cylinder 41, so that the guide cylinder 41 is rotationally connected to the through hole 31 in a matching manner; the needle limiting portion 42 is arranged at the bottom of the guide cylinder 41, and a cavity for the needle 2 to penetrate through is formed in the needle limiting portion 42 and the guide cylinder 41; the limiting step 43 is circumferentially formed on the outer edge of the connection between the guide cylinder 41 and the needle limiting portion 42, and the top surface of the limiting step 43 can abut against the bottom surface of the heating cylinder 3.
[0025] The cavity in the guide cylinder 41 and the needle limiting portion 42 is used for the needle 2 to penetrate through, so as to more accurately limit the X and Y coordinates of the needle 2. The limiting step 43 is a planar flange structure, which is used to fit with the bottom surface of the heating cylinder 3, so as to more accurately limit the Z coordinate of the needle 2.
[0026] The described guide cylinder 41, needle limiting portion 42, and limiting step 43 are of an integral structure, and the needle guide 4 can be processed and manufactured by integral molding through a mold, with a simple structure and easy production.
[0027] The described guide cylinder 41, needle limiting portion 42, and limiting step 43 are coaxially arranged to ensure the coaxial penetration of the needle 2, thereby improving the consistency between the X and Y coordinates of the needle 2 and the standard coordinates.
[0028] Please refer to Appendix Figure 2 (b), the described rubber tube 1 includes a rubber tube main body 11 and a needle installation portion 12 located at the bottom of the rubber tube main body 11 and used for installing the needle 2. When the limiting step 43 abuts against the bottom surface of the heating cylinder 3, the top surface of the guide cylinder 41, the top surface of the through hole 31, and the connection between the rubber tube main body 11 and the needle installation portion 12 are flush.
[0029] Through the abutting limit between the limiting step 43 and the bottom surface of the heating cylinder 3, the top surface of the guide cylinder 41 can be controlled to be flush with the top surface of the through hole 31, and the connection between the rubber tube main body 11 and the needle installation portion 12 is supported by the top surface of the guide cylinder 41 and the top surface of the through hole 31, so as to limit the degree of insertion of the rubber tube 1 into the heating cylinder 3, thereby ensuring the insertion stroke of the needle 2 in the Z direction and realizing the precise control of the Z coordinate of the needle 2 to keep it consistent with the standard coordinate.
[0030] The inner diameter of the cavity of the described guide cylinder 41 is slightly larger than the diameter of the needle installation portion 12, so that the needle installation portion 12 is inserted into the guide cylinder 41 in a matching manner.
[0031] The inner diameter of the cavity of the guide cylinder 41 is adaptively manufactured according to the size of the needle installation portion 12, and it is appropriate that the needle installation portion 12 can be smoothly inserted and withdrawn and the shaking range is within the allowable range, so as to ensure the consistency between the X and Y axis coordinates of the needle 2 and the standard coordinates after installation.
[0032] The inner diameter of the cavity of the limiting step 43 is slightly larger than the diameter of the needle 2, so that the needle 2 is inserted into the limiting step 43 in a matching manner.
[0033] The inner diameter of the cavity of the limiting step 43 is adaptively made according to the diameter of the needle 2, so that the needle 2 can be smoothly inserted and withdrawn and the shaking range is within the allowable range, thereby further ensuring the consistency of the X and Y axis coordinates of the needle 2 after installation with the standard coordinates.
[0034] Please refer to the appendix Figure 2 and the appendix Figure 3 The needle limiting part 42 is in an inverted conical structure, and the top diameter of the needle limiting part 42 is slightly smaller than the diameter of the guiding cylinder 41.
[0035] The inverted conical needle limiting part 42 wraps around the outside of the needle 2. While ensuring the consistency of the insertion of the needle 2, the influence on the dispensing operation of the needle 2 is reduced by narrowing the external dimensions.
[0036] Please refer to the appendix Figure 2 and the appendix Figure 3 The usage method and working principle of the present utility model are as follows:
[0037] The standard coordinates (X, Y, Z) of the needle are determined through the needle program in the automatic dispensing machine. Each time the rubber tube 1 and the needle 2 are replaced, first run the needle program, and then install the rubber tube 1 with the needle 2.
[0038] The guiding cylinder 41 is screwed into the through hole 31 at the bottom of the heating cylinder 3, so that the top surface of the needle limiting part 42 fits and abuts against the bottom surface of the heating cylinder 3. When installing the rubber tube 1, the needle 2 is passed through the guiding cylinder 41 and the needle limiting part 42, so as to ensure that the X and Y coordinates of the newly installed needle 2 in space are consistent with the standard coordinates.
[0039] Since the needle limiting part 42 fits against the bottom surface of the heating cylinder 3, the top of the guiding cylinder 41 can be used to limit the insertion of the needle installation part 12, thereby ensuring that the Z coordinate of the needle 2 in space is consistent with the standard coordinate.
[0040] Finally, the locking bolt 5 is tightened to fix the rubber tube 1. Locking the rubber tube 1 in the heating cylinder 3 through the locking bolt 5 is a conventional operation for replacing the rubber tube 1, which will not be elaborated here.
[0041] The above is only the preferred embodiment of the present utility model, and is not used to limit the protection scope of the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A needle limiter for an automatic glue dispensing machine, characterized by: The invention comprises a rubber hose (1), a needle (2), a heating tube (3) and a needle guide (4); the rubber hose (1) is inserted into the heating tube (3) of the automatic glue dispensing machine, and the needle (2) at the bottom of the rubber hose (1) passes downward through a through hole (31) at the bottom of the heating tube (3); an internal thread (32) is formed in the through hole (31) at the bottom of the heating tube (3), and an external thread (40) matching the internal thread (32) is formed on the needle guide (4), so that the needle guide (4) is matched and screwed into the through hole (31), and the needle guide (4) can abut against the bottom surface of the heating tube (3), and the needle (2) passes through the needle guide (4).
2. The needle limit device for the automatic glue dispensing machine according to claim 1 is characterized in that: The needle guide (4) comprises a guide tube (41), a needle limiting portion (42) and a limiting step (43); an external thread (40) is formed on the outer wall of the guide tube (41), so that the guide tube (41) can be matched and screwed into the through hole (31); the needle limiting portion (42) is arranged at the bottom of the guide tube (41), and a cavity for the needle (2) to pass through is formed in the needle limiting portion (42) and the guide tube (41); the limiting step (43) is circumferentially formed on the outer edge of the connection between the guide tube (41) and the needle limiting portion (42), and the top surface of the limiting step (43) can abut against the bottom surface of the heating tube (3).
3. The needle limit device for the automatic glue dispensing machine according to claim 2 is characterized in that: The guide tube (41), the needle limiting portion (42) and the limiting step (43) are an integrated structure.
4. The needle limiting device for an automatic glue dispensing machine according to claim 2 or 3, characterized in that: The guide tube (41), the needle limiting portion (42) and the limiting step (43) are coaxially arranged.
5. The needle limit device for the automatic glue dispensing machine according to claim 2 is characterized in that: The rubber hose (1) comprises a rubber hose body (11) and a needle mounting portion (12) located at the bottom of the rubber hose body (11) and used to mount the needle (2); when the limiting step (43) abuts against the bottom surface of the heating cylinder (3), the top surface of the guide cylinder (41), the top surface of the through hole (31) and the connection between the rubber hose body (11) and the needle mounting portion (12) are flush.
6. The needle limit device for the automatic glue dispensing machine according to claim 4 is characterized in that: The inner diameter of the cavity of the guide tube (41) is larger than the diameter of the needle mounting portion (12), so that the needle mounting portion (12) can be matched and inserted into the guide tube (41).
7. The needle limit device for an automatic glue dispensing machine according to claim 4 is characterized in that: The inner diameter of the cavity of the needle stopper (42) is larger than the diameter of the needle (2), so that the needle (2) can be matched and inserted into the needle stopper (42).
8. The needle limit device for the automatic glue dispensing machine according to claim 7 is characterized in that: The needle stopper (42) is an inverted cone-shaped structure, and the top diameter of the stopper step (43) is smaller than the diameter of the guide tube (41).