Glue injection nozzle and glue injection method

Abstract

The application discloses a glue injection nozzle and a glue injection method, which comprise a nozzle seat, wherein the nozzle seat is provided with a first channel, the nozzle seat is fixedly provided with a nozzle main body, the nozzle main body is provided with a second channel, a third channel and a fourth channel, the first channel, the second channel, the third channel and the fourth channel are sequentially communicated, a plug rod is insertedly arranged in the third channel, the plug rod comprises a plug rod main body part, a baffle is arranged on the side of the plug rod main body part close to the second channel, the outer diameter of the baffle is the same as the inner diameter of the third channel, the baffle is moved to the side close to the second channel to disconnect the third channel and the fourth channel, and the baffle is moved to the side away from the second channel to connect the third channel and the fourth channel. The glue injection nozzle and the glue injection method can effectively control the glue coating amount and reduce the glue outlet blocking phenomenon.

Description

Technical Field

[0001] This invention relates to the field of glue dispensing equipment technology, and more specifically, to a glue dispensing nozzle and a glue dispensing method. Background Technology

[0002] Currently, glue spraying machines use a continuous glue dispensing method by squeezing the glue. The glue tends to accumulate near the nozzle. Since the glue at the nozzle is in direct contact with the outside environment, it hardens as the temperature drops, causing blockages. This hardening phenomenon is more frequent, especially during machine shutdown and maintenance, requiring timely cleaning, which is detrimental to automated production. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a glue dispensing nozzle and glue dispensing method that effectively controls the amount of glue applied and reduces the phenomenon of glue outlet blockage.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a glue-dispensing nozzle, including a nozzle base, a first channel, a nozzle body fixedly mounted on the nozzle base, and a second, third, and fourth channel on the nozzle body. The first, second, third, and fourth channels are sequentially connected. A rod is inserted into the third channel, the rod including a rod body. A baffle is installed on the side of the rod body near the second channel, the outer diameter of the baffle being the same as the inner diameter of the third channel. The baffle moves towards the side near the second channel to disconnect the third and fourth channels, and moves away from the second channel to connect the third and fourth channels. The first channel includes an inlet end away from the second channel, which is a feeding end. The nozzle base also has a insertion hole connected to the first channel. A slider is slidably connected to the insertion hole, and the slider can be inserted into the first channel so that the material entering from the inlet end is blocked by the slider and cannot enter the second channel. The slider has an air passage, which is always connected to the second channel through the first channel.

[0005] The invention is further configured such that the nozzle body is also provided with an extension channel, the extension channel is coaxial with the third channel, the inner diameter of the extension channel is larger than the inner diameter of the third channel, the extension channel is equipped with a bladder, the bladder includes a second wall surface located at the innermost radial side, the inner diameter of the second wall surface is the same as the outer diameter of the baffle, the bladder is provided with a cavity, and after the cavity is filled with air, the inner diameter of the second wall surface decreases.

[0006] The invention is further configured such that the outer wall surface of the capsule abuts against the inner wall surface of the extension channel.

[0007] The invention is further configured such that the nozzle body includes a first nozzle and a second nozzle, the nozzle body has a splicing surface, the first nozzle and the second nozzle are spliced ​​and fixed to each other at the splicing surface, the first nozzle has a countersunk hole one, the second nozzle has a countersunk hole two, and the countersunk hole one and the countersunk hole two are axially connected to form an extended channel.

[0008] The invention is further configured such that when the baffle moves toward the side closer to the second channel, the cavity is inflated and the second wall bulges, thereby increasing the force between the second wall and the baffle; when the baffle moves away from the second channel, the cavity is deflated, thereby reducing the force between the second wall and the baffle.

[0009] The invention is further configured such that the first channel is arranged in a vertical direction and the inlet end is located at the bottom of the first channel.

[0010] The invention is further configured such that the first channel cross-section is square, the slider cross-section is rectangular, and the width of the slider cross-section is the same as the side length of the first channel cross-section.

[0011] The invention is further configured such that the slider is also provided with a second air passage, one end of which is connected to the first air passage in the axial direction, and the other end of which passes through the outer wall of the slider in the circumferential direction and is connected to the insertion hole.

[0012] The present invention also adopts the following technical solution: a glue spraying method for a glue spraying nozzle, comprising the following steps:

[0013] ① Move the main body of the insertion rod to its left limit position;

[0014] ② The adhesive is injected into the nozzle seat, filling the first channel and the second channel and reaching the baffle;

[0015] ③ Insert the slider into the first channel to separate the colloid within the first channel;

[0016] ④ The main body of the insertion rod moves to its right limit position, and the third channel connects with the fourth channel;

[0017] ⑤ Increase the air pressure in the first airway; the increased air pressure will push the colloid out of the fourth airway.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. By using a slider to separate the adhesive in the channel, the amount of adhesive sprayed at one time can be controlled, preventing excessive or insufficient application during the coating process and improving the coating quality.

[0020] 2. Driven by air pressure, the colloid is accelerated and flows to the outlet of the fifth channel. Due to the colloid's viscosity and adhesion to the pipe wall, the airflow cannot break through it, thus ensuring that the airflow can steadily propel the colloid. Before being discharged from the fifth channel, the colloid undergoes a period of acceleration, combined with the continuous action of air pressure, to reduce the colloid's retention near the outlet of the fifth channel. Compared with the traditional method of continuously dispensing colloid by extrusion, this greatly reduces the outlet blockage caused by the colloid hardening and retention at the outlet. Attached Figure Description

[0021] Figure 1Cross-sectional view of the embodiment Figure 1 ;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a cross-sectional view of the capsule in the embodiment;

[0024] Figure 4 Cross-sectional view of the embodiment Figure 2 ;

[0025] Figure 5 The position of the baffle in the embodiment Figure 1 ;

[0026] Figure 6 The position of the baffle in the embodiment Figure 2 .

[0027] Reference numerals: Nozzle holder 1, First channel 11, Inlet end 111, Insertion hole 12, Slider 2, Air passage 1 21, Air passage 2 22, Nozzle body 3, First nozzle 31, Second nozzle 32, Second channel 33, Third channel 34, Extension channel 35, Countersunk hole 1 351, Countersunk hole 2 352, Fourth channel 36, Fifth channel 361, Splicing surface 37, Connecting pipe 4, Insert rod 5, Insert rod body 51, Baffle 52, Bag 6, Interface 61, Cavity 62, Through hole 63, First wall surface 64, Second wall surface 65, Air tube 7. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-6 As shown, this embodiment discloses a glue dispensing nozzle, including a nozzle base 1. The nozzle base 1 is arranged vertically along its length. The nozzle base 1 is provided with a first channel 11. The first channel 11 has a square cross-section and runs vertically through the nozzle base 1. The first channel 11 is arranged vertically and includes an inlet end 111 located at the bottom. The inlet end 111 is a feeding end and is connected to the glue outlet of the glue dispensing machine.

[0030] like Figure 1As shown, a nozzle body 3 is fixedly installed on the upper end of the nozzle holder 1. The nozzle body 3 has a second channel 33, a third channel 34, and a fourth channel 36, which are sequentially connected. Specifically, the second channel 33 is vertically oriented, the upper end of the first channel 11 is connected to the second channel 33, the third channel 34 is a horizontal hole, the left end of the third channel 34 is connected to the second channel 33, and the fourth channel 36 is connected to the right end of the third channel 34. The fourth channel 36 includes a fifth channel 361, which penetrates the outer wall of the nozzle body 3 and serves as the dispensing port of the nozzle body 3.

[0031] like Figure 1 As shown, the nozzle body 3 includes a first nozzle 31 and a second nozzle 32. The nozzle body 3 is provided with a splicing surface 37. The first nozzle 31 and the second nozzle 32 are joined together from left to right. The first nozzle 31 and the second nozzle 32 are spliced ​​together at the splicing surface 37 and fixed to each other.

[0032] The left side portion of the third channel 34 is inside the first nozzle 31, and the left side of the third channel 34 extends to the left along the right end of the first nozzle 31. The right side portion of the third channel 34 is inside the second nozzle 32, and the right side of the third channel 34 extends to the right along the left end of the second nozzle 32 and penetrates the right end of the second nozzle 32.

[0033] The second channel 33 extends upward along the bottom surface of the first nozzle 31 and connects to the left end of the third channel 34, and the fourth channel 36 extends upward along the bottom surface of the second nozzle 32 and connects to the third channel 34.

[0034] like Figure 1 As shown, the nozzle body 3 is also provided with an extension channel 35, combined with Figure 1 , Figure 2 The extension channel 35 is coaxial with the third channel 34. The inner diameter of the extension channel 35 is larger than the inner diameter of the third channel 34. The left end of the extension channel 35 extends to be close to the second channel 33, and the right end of the extension channel 35 extends to be connected to the fourth channel 36.

[0035] like Figure 2 As shown, the first nozzle 31 is provided with a countersunk hole 351, and the second nozzle 32 is provided with a countersunk hole 352. The first countersunk hole 351 and the second countersunk hole 352 are axially connected to form an extended channel 35.

[0036] like Figure 2 As shown, the extension channel 35 is fitted with a capsule 6, which is a cylindrical structure made of rubber. The capsule 6 has an axially extending hole. The capsule 6 includes a second wall surface 65 located radially innermost and a first wall surface 64 located radially outermost. The outer wall surface of the capsule 6 abuts against the inner wall surface of the extension channel 35. Specifically, the first wall surface 64 abuts against the circumferential inner wall of the extension channel 35, and the two end faces of the capsule 6 abut against the axial end walls of the extension channel 35. Figure 2 , Figure 3 The capsule 6 has an interface 61 and a cavity 62. An air tube 7 is connected to the capsule 6 through the interface 61. Air is introduced and drawn out through the air tube 7 to inflate or deflate the cavity 62. A through hole 63 is provided at the bottom right side of the capsule 6. The two ends of the through hole 63 are connected to the fourth channel 36 and the extension channel 35, respectively.

[0037] like Figure 1 As shown, a rod 5 is inserted and installed in the third channel 34. The rod 5 can move left and right along the axial direction. The right end of the rod 5 extends out of the second nozzle 32 and is connected to the electric cylinder. Figure 2 As shown, the insertion rod 5 includes a insertion rod body 51 at the left end, the insertion rod body 51 can be inserted into the second wall surface 65, and the outer diameter of the insertion rod body 51 is smaller than that of the third channel 34.

[0038] Combination Figure 1 , Figure 2 A baffle 52 is installed on the side of the main body 51 of the insertion rod near the second channel 33. The outer diameter of the baffle 52 is the same as the inner diameter of the third channel 34, and the outer diameter of the baffle 52 is also the same as the inner diameter of the second wall surface 65. Baffle 52 moves towards the side closer to the second channel 33 to disconnect the third channel 34 from the fourth channel 36. During this process, cavity 62 is inflated, the inner diameter of the second wall 65 decreases, and the second wall 65 bulges, increasing the force between the second wall 65 and the outer peripheral wall of baffle 52. Baffle 52 can push the colloid on the second wall 65 towards the side closer to the second channel 33. Moving baffle 52 away from the second channel 33 allows the third channel 34 to connect with the fourth channel 36. During this process, cavity 62 is deflated, reducing the force between the second wall 65 and baffle 52. This allows the colloid on the outer wall of baffle 52 to be applied to the second wall 65, reducing the amount of colloid carried into the third channel 34 located to the right of the fourth channel 36 when baffle 52 moves to the right, thus reducing the occurrence of blockage.

[0039] like Figure 1 As shown, the nozzle holder 1 is also provided with an insertion hole 12, which is connected to the first channel 11. A slider 2 is slidably connected to the insertion hole 12. The slider 2 has a rectangular cross-section, and the width of the slider 2 is the same as the side length of the first channel 11. The slider 2 can be inserted into the first channel 11 so that the incoming material entering from the inlet end 111 is blocked by the slider 2 and cannot enter the second channel 33.

[0040] The slider 2 is connected to the connecting pipe 4, which is connected to an external air tube. The slider 2 is provided with an air passage 21, which is connected to the connecting pipe 4. The air passage 21 is always connected to the second channel 33 through the first channel 11.

[0041] The slider 2 is also provided with a second air passage 22. One end of the second air passage 22 is connected to the first air passage 21, and the other end passes through the outer circumferential wall of the slider 2 and is connected to the insertion hole 12. The first air passage 21 is kept in an air intake state, and the gas discharged from the second air passage 22 flows to the first channel 11 to avoid excessive flow of colloid in the first channel 11 into the slider 2, which would harden and cause blockage.

[0042] The glue spraying method of the above-mentioned glue nozzle includes the following steps:

[0043] ① The cavity 62 is inflated and pressurized through the trachea 7, causing the second wall 65 to bulge. The force between the second wall 65 and the outer peripheral wall of the baffle 52 increases, and the main body 51 of the insertion rod moves to the left extreme position (i.e., close to the second channel 33 but not reaching the second channel 33, that is... Figure 6 At position M), the baffle 52 pushes the colloid on the second wall 65 toward the side closer to the second channel 33.

[0044] ② The adhesive is injected into the nozzle seat 1, filling the first channel 11 and the second channel 33 and reaching the baffle 52 to control the amount of adhesive injected in a single spray.

[0045] ③ The slider 2 is inserted into the first channel 11 to separate the colloid within the first channel 11. During the insertion of the slider 2 into the first channel 11, the main body 51 of the insert rod moves to the right from... Figure 6 The M position is moved to the N position to make room to prevent excessive internal colloid pressure.

[0046] ④ The cavity 62 is depressurized and vented, and the main body of the insert rod 51 moves to the right from... Figure 6 The middle N position is moved to the right extreme position (i.e. Figure 5 (As shown at position P), the third channel 34 is connected to the fourth channel 36. At this time, the gas discharged from the first channel 11 through the first channel 21 is insufficient to push the colloid upward.

[0047] ⑤ Increase the air pressure in the inlet airway 21. The air pressure propels the colloid out of the fifth channel 361. Driven by the air pressure, the colloid is accelerated and flows to the outlet of the fifth channel 361. Due to the colloid's viscosity and adhesion to the channel wall, the airflow cannot break through the colloid, thus ensuring a steady flow of the colloid. Before being discharged from the fifth channel 361, the colloid undergoes a period of acceleration, combined with the continuous action of air pressure, to reduce colloid retention near the outlet of the fifth channel 361, thereby reducing the obstruction at the outlet caused by hardening of the colloid.

[0048] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A glue dispensing nozzle, characterized in that, The device includes a nozzle holder (1), which has a first channel (11). A nozzle body (3) is fixedly installed on the nozzle holder (1). The nozzle body (3) has a second channel (33), a third channel (34), and a fourth channel (36). The first channel (11), the second channel (33), the third channel (34), and the fourth channel (36) are connected in sequence. A rod (5) is inserted into the third channel (34). The rod (5) includes a rod body (51). A baffle (52) is installed on the side of the rod body (51) near the second channel (33). The outer diameter of the baffle (52) is the same as the inner diameter of the third channel (34). The baffle (52) moves towards the side near the second channel (33) to disconnect the third channel (34) from the fourth channel (36). The baffle (52) moves away from the second channel (33) to connect the third channel (34) with the fourth channel (36). The first channel (11) includes an inlet end (111) on the side away from the second channel (33), the inlet end (111) is a feeding end, the nozzle seat (1) is also provided with a socket (12), the socket (12) is connected to the first channel (11), the socket (12) is slidably connected to a slider (2), the slider (2) can be inserted into the first channel (11) so that the incoming material entering from the inlet end (111) is blocked by the slider (2) and cannot enter the second channel (33); The slider (2) is provided with an air passage (21), which is always connected to the second channel (33) through the first channel (11); The nozzle body (3) is also provided with an extension channel (35), which is coaxial with the third channel (34). The inner diameter of the extension channel (35) is larger than the inner diameter of the third channel (34). The extension channel (35) is equipped with a bladder (6). The bladder (6) includes a second wall surface (65) located at the innermost radial side. The inner diameter of the second wall surface (65) is the same as the outer diameter of the baffle (52). The bladder (6) is provided with a cavity (62). After the cavity (62) is inflated, the inner diameter of the second wall surface (65) decreases. When the baffle (52) moves toward the side closer to the second channel (33), the cavity (62) is inflated, and the second wall (65) bulges up, so as to increase the force between the second wall (65) and the baffle (52). When the baffle (52) moves away from the second channel (33), the cavity (62) deflates, so as to decrease the force between the second wall (65) and the baffle (52).

2. The glue dispensing nozzle according to claim 1, characterized in that, The outer wall of the capsule (6) abuts against the inner wall of the extension channel (35).

3. The dispensing nozzle according to claim 1, characterized in that, The nozzle body (3) includes a first nozzle (31) and a second nozzle (32). The nozzle body (3) has a splicing surface (37). The first nozzle (31) and the second nozzle (32) are spliced ​​and fixed to each other at the splicing surface (37). The first nozzle (31) has a countersunk hole one (351), and the second nozzle (32) has a countersunk hole two (352). The countersunk hole one (351) and the countersunk hole two (352) are axially connected to form the extension channel (35).

4. The glue dispensing nozzle according to claim 1, characterized in that, The first channel (11) is arranged in a vertical direction, and the inlet end (111) is located at the bottom of the first channel (11).

5. A glue dispensing nozzle according to claim 1, characterized in that, The first channel (11) has a square cross-section, and the slider (2) has a rectangular cross-section. The width of the slider (2) cross-section is the same as the side length of the first channel (11) cross-section.

6. The glue dispensing nozzle according to claim 1, characterized in that, The slider (2) is also provided with an air passage two (22), one end of which is connected to the air passage one (21) and the other end is connected to the outer wall of the slider (2) and the insertion hole (12).

7. The glue spraying method of the glue spray nozzle according to claim 1, characterized in that, Includes the following steps: ①The main body (51) of the insertion rod is moved to the left extreme position; ②The nozzle seat (1) is filled with adhesive, which fills the first channel (11) and the second channel (33) and extends to the baffle (52); ③ The slider (2) is inserted into the first channel (11) to separate the colloid in the first channel (11); ④ The main body of the insertion rod (51) moves to the right limit position, and the third channel (34) and the fourth channel (36) are connected; ⑤ Increase the air pressure entering the first airway (21), and the air pressure pushes the colloid out of the fourth channel (36).

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