Glue needle of automatic glue dispensing machine

Abstract

The utility model discloses a glue needle of an automatic glue dispenser, and relates to the technical field of glue needles. The device comprises a needle base, a needle tube is fixedly connected to the lower portion of the needle base, and a heating sleeve is arranged on the peripheral side of the needle base. A spiral liquid inlet groove, a spiral liquid return groove and a U-shaped groove are formed in the heating sleeve, the U-shaped groove is communicated with the lower portion of the spiral liquid inlet groove and the lower portion of the spiral liquid return groove, the spiral liquid inlet groove and the spiral liquid return groove are located on the peripheral side of the needle base, and the length of the needle tube is 3.35 mm. The length of the needle tube is shortened to 3.35 mm, the flowing stroke of glue in the needle tube is reduced, the glue is not prone to being solidified in the needle tube, the abnormal probability of glue interruption or glue blocking in the production process is reduced, the average leakage point defect is reduced by 0.15% compared with a 6.35 mm glue needle, the average service time is prolonged by two hours, and the production efficiency is improved. And the glue flowing in the glue needle is subjected to heat preservation and reheating through the heating sleeve, so that the curing probability of the glue in the needle tube is further reduced.

Description

Technical Field

[0001] The utility model belongs to the field of glue needles, and in particular relates to a glue needle for an automatic glue dispensing machine. Background Art

[0002] Glue dispensing machine, also known as glue coating machine, glue dripping machine, glue spraying machine, glue filling machine, etc., is an automated machine that specializes in controlling fluids and dripping and coating fluids on the surface or inside of products. It can realize three-dimensional and four-dimensional path dispensing. The glue needle is a detachable needle on the glue dispensing machine.

[0003] The existing dispensing machines use red 25G needles with a length of 6.35mm. In the production process, the needles are often blocked and the glue is not discharged smoothly. This easily leads to poor batch quality and the need for frequent replacement of the needles. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a glue needle for an automatic glue dispensing machine.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A glue needle for an automatic glue dispensing machine comprises a needle seat, a needle tube is fixedly connected to the lower part of the needle seat, and a heating sleeve is arranged around the needle seat;

[0007] The heating sleeve is provided with a spiral liquid inlet groove, a spiral liquid return groove and a U-shaped groove. The U-shaped groove is connected to the lower part of the spiral liquid inlet groove and the spiral liquid return groove. The spiral liquid inlet groove and the spiral liquid return groove are located on the peripheral side of the needle seat. The U-shaped groove is located on the side of the needle seat. The length of the needle tube is 3.35mm.

[0008] Optionally, the inner diameter of the needle tube is 0.25 mm and the outer diameter is 0.35 mm, and the inner and outer walls of the needle tube are polished and ground.

[0009] Optionally, two extension tubes are provided on the side of the heating sleeve, which are respectively connected to the spiral liquid inlet groove and the spiral liquid return groove. The ends of the extension tubes are fixedly connected with joints, which are convenient for externally connecting a circulating water pump and a heating water tank.

[0010] Optionally, a ring plate is provided around the needle seat, the heating sleeve is located at the lower end of the ring plate, a plurality of connecting ears are provided on the upper end surface of the heating sleeve, screws corresponding to the ring plate are provided on the connecting ears, and the ring plate is used to limit the distance that the needle seat is inserted into the heating sleeve.

[0011] Optionally, a positioning groove compatible with the connecting ear is provided on the side of the ring plate, the positioning groove passes through the lower end surface of the ring plate, the connecting ear is snapped into the positioning groove, and a screw hole compatible with the screw is provided at one end of the inner wall of the positioning groove, one end of the screw passes through the connecting ear and is threaded in the screw hole, and the connecting ear and the ring plate are connected by the screw, so that the needle seat and needle tube can be replaced after the glue is blocked.

[0012] Optionally, the thickness of the connecting ear is smaller than the thickness of the positioning groove, the head of the screw is located in the positioning groove, and the connecting ear and the head of the screw are accommodated by the positioning groove.

[0013] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0014] By shortening the length of the needle tube to 3.35mm, the distance that the glue flows in the needle tube is reduced, making it difficult for the glue to solidify in the needle tube, and reducing the abnormal probability of glue breakage or blockage in the production process, the average leakage point of the glue needle is reduced by 0.15% compared to the 6.35mm glue needle, and the average use time is extended by two hours. The glue flowing in the glue needle is insulated and reheated by the heating sleeve to further reduce the probability of the glue solidifying in the needle tube. The spiral liquid inlet groove, the spiral liquid return groove and the U-shaped groove are used to extend the distance and time that the hot water flows in the heating sleeve, thereby improving the utilization rate of the hot water. The spiral liquid inlet groove and the spiral liquid return groove are both located on the side of the needle seat, so as to improve the uniformity of the heating sleeve heating the glue.

[0015] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] In the figure:

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic cross-sectional structure diagram of an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the splitting effect structure of an embodiment of the utility model.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] Needle seat 1, ring plate 101, positioning groove 102, screw hole 103, needle tube 2, heating sleeve 3, spiral liquid inlet groove 301, spiral liquid return groove 302, U-shaped groove 303, connecting ear 304, extension tube 305, joint 4, screw 5.

[0023] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] The utility model will now be described in further detail with reference to the accompanying drawings.

[0025] See also Figure 1-3 As shown, in this embodiment, a glue needle for an automatic glue dispensing machine is provided, comprising a needle seat 1, a needle tube 2 is fixedly connected to the lower part of the needle seat 1, and a heating sleeve 3 is arranged around the needle seat 1;

[0026] A spiral liquid inlet groove 301, a spiral liquid return groove 302 and a U-shaped groove 303 are provided in the heating sleeve 3. The U-shaped groove 303 is connected to the lower parts of the spiral liquid inlet groove 301 and the spiral liquid return groove 302. The spiral liquid inlet groove 301 and the spiral liquid return groove 302 are located on the peripheral side of the needle seat 1, and the U-shaped groove 303 is located on the side of the needle seat 1. The length of the needle tube 2 is 3.35 mm.

[0027] One aspect of the application of this embodiment is: during use, hot water is injected from the upper part of the spiral liquid inlet groove 301, so that the hot water flows downward along the spiral liquid inlet groove 301 around the needle seat 1, and then the hot water flows into the spiral liquid return groove 302 through the U-shaped groove 303, so that the hot water flows upward along the spiral liquid return groove 302 around the needle seat 1, and finally flows out from the upper part of the spiral liquid return groove 302.

[0028] The inner diameter of the needle tube 2 of this embodiment is 0.25 mm and the outer diameter is 0.35 mm. The outer ring position of the lower end face of the needle tube 2 is chamfered. The inner and outer walls of the needle tube 2 are polished and ground. By reducing the outer diameter of the needle tube 2, the glue needle is suitable for dispensing various types of escape holes.

[0029] The side of the heating sleeve 3 of this embodiment is provided with two extension tubes 305 which are respectively connected to the spiral liquid inlet groove 301 and the spiral liquid return groove 302. The end of the extension tube 305 is fixedly connected with a joint 4, which is convenient for externally connecting a circulating water pump and a heating water tank through the joint 4, so as to facilitate the continuous injection of hot water into the spiral liquid inlet groove 301.

[0030] In this embodiment, a ring plate 101 is provided on the circumference of the needle seat 1, and the heating sleeve 3 is located at the lower end of the ring plate 101. A plurality of connecting ears 304 are provided on the upper end surface of the heating sleeve 3, and screws 5 corresponding to the ring plate 101 are provided on the connecting ears 304. During installation, the needle tube 2 is inserted from above the heating sleeve 3 so that the heating sleeve 3 is sleeved on the needle seat 1 until the lower end surface of the needle seat 1 contacts the upper end surface of the heating sleeve 3, and the distance that the needle seat 1 is inserted into the heating sleeve 3 is limited by the ring plate 101.

[0031] The side of the ring plate 101 of this embodiment is provided with a positioning groove 102 that is compatible with the connecting ear 304. The positioning groove 102 passes through the lower end surface of the ring plate 101, and the connecting ear 304 is snapped into the positioning groove 102. One end of the inner wall of the positioning groove 102 is provided with a screw hole 103 that is compatible with the screw 5. One end of the screw 5 passes through the connecting ear 304 and is threadedly engaged in the screw hole 103. The positioning groove 102 and the connecting ear 304 cooperate to facilitate the positioning and installation of the heating sleeve 3. When the lower end surface of the needle seat 1 conflicts with the upper end surface of the heating sleeve 3, the hole of the connecting ear 304 corresponds to the screw hole 103. The connecting ear 304 and the ring plate 101 are connected by the screw 5, so that the needle seat 1 and the needle tube 2 after the glue blocking can be replaced.

[0032] The thickness of the connecting ear 304 of this embodiment is smaller than the thickness of the positioning groove 102 . The head of the screw 5 is located in the positioning groove 102 . The connecting ear 304 and the head of the screw 5 are accommodated by the positioning groove 102 , thereby improving the neatness of the surface of the ring plate 101 .

[0033] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. A glue needle for an automatic glue dispensing machine, characterized in that: include: A needle seat (1), a needle tube (2) is fixedly connected to the lower part of the needle seat (1), and a heating sleeve (3) is arranged on the peripheral side of the needle seat (1); A spiral liquid inlet groove (301), a spiral liquid return groove (302), and a U-shaped groove (303) are provided in the heating sleeve (3); the U-shaped groove (303) is connected to the lower parts of the spiral liquid inlet groove (301) and the spiral liquid return groove (302); the spiral liquid inlet groove (301) and the spiral liquid return groove (302) are located on the circumferential side of the needle seat (1); and the length of the needle tube (2) is 3.35 mm.

2. The glue needle of an automatic glue dispensing machine according to claim 1, characterized in that: The inner diameter of the needle tube (2) is 0.25 mm and the outer diameter is 0.35 mm.

3. The glue needle of an automatic glue dispensing machine according to claim 1, characterized in that: Two extension tubes (305) are provided on the side of the heating sleeve (3) and are respectively connected to the spiral liquid inlet groove (301) and the spiral liquid return groove (302), and the ends of the extension tubes (305) are fixedly connected to joints (4).

4. The glue needle of an automatic glue dispensing machine according to claim 1, characterized in that: A ring plate (101) is provided on the circumference of the needle seat (1), a plurality of connecting ears (304) are provided on the upper end surface of the heating sleeve (3), and screws (5) corresponding to the ring plate (101) are provided on the connecting ears (304).

5. The glue needle of an automatic glue dispensing machine according to claim 4, characterized in that: A positioning groove (102) matched with the connecting ear (304) is provided on the side of the ring plate (101), a screw hole (103) matched with the screw (5) is provided at one end of the inner wall of the positioning groove (102), and one end of the screw (5) passes through the connecting ear (304) and is threadedly engaged in the screw hole (103).

6. The glue needle of an automatic glue dispensing machine according to claim 5, characterized in that: The thickness of the connecting ear (304) is smaller than the thickness of the positioning groove (102), and the head of the screw (5) is located in the positioning groove (102).

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