Flat head glue coating nozzle and glue coating equipment

Abstract

The utility model relates to a kind of flat head glue coating nozzle and glue coating equipment, the flat head glue coating nozzle includes body structure, glue inlet, located in the side of body structure;Glue outlet is a character type, located in the other side of body structure, the center line of the glue outlet coincides with the center line of the glue inlet, the cross-sectional area of glue outlet is less than the cross-sectional area of glue inlet;Inner cavity, located in the inside of the body structure, communicate glue inlet and glue outlet, the cross-sectional width of the inner cavity gradually increases from glue inlet to expansion width, then shrink to the glue width of glue outlet, to ensure that under the same glue coating condition, effectively reduce the bubble amount in rubber strip, ensure that glue coating quality is improved while glue coating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automatic glue application technology, and in particular to a flat-head glue application nozzle and glue application equipment. Background Technology

[0002] As the core energy carrier of the entire vehicle, the assembly process of the power battery in new energy vehicles directly affects the structural safety and energy density of the battery pack. The current mainstream CTP (Cell to Pack) technology significantly improves space utilization by directly integrating the cells into the battery pack. This technology requires the continuous application of wide sealing strips to the bottom of the pack to secure the battery modules, and typically uses automated adhesive application equipment with flat-head nozzles. The process demands precise width and thickness parameters for the adhesive strips, while ensuring the absence of air bubbles within the adhesive. This places stringent requirements on the precision control of the adhesive application equipment and the stability of the process.

[0003] With the continuous increase in automation rate and the accelerating production cycle of new energy battery production lines, the coating process faces the dual challenges of quality and efficiency. Existing flat-nozzle coating processes are prone to generating air bubbles within the coating material during high-speed operation, leading to a decrease in the adhesive strength. To eliminate these air bubble defects, manufacturers are often forced to reduce coating speed, making it difficult to overcome bottlenecks in production line cycle time and equipment utilization. This imbalance between quality stability and production efficiency has become a prominent technical obstacle restricting the high-quality and high-efficiency production of power batteries, urgently requiring breakthrough improvements through process innovation. Utility Model Content

[0004] In response to the shortcomings of the existing production technology, the applicant provides a flat-headed glue applicator and glue applicator equipment, thereby ensuring that under the same glue applicator conditions, the amount of air bubbles in the glue strip is effectively reduced, and the glue applicator quality is guaranteed while the glue applicator efficiency is improved.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A flat-headed glue applicator, including

[0007] Body structure,

[0008] The glue inlet is located on one side of the main structure;

[0009] The glue outlet is in the shape of a straight line and is located on the other side of the main body structure. The center line of the glue outlet coincides with the center line of the glue inlet, and the cross-sectional area of ​​the glue outlet is smaller than that of the glue inlet.

[0010] The inner cavity, located inside the main body structure, connects the glue inlet and the glue outlet. The cross-sectional width of the inner cavity gradually increases from the glue inlet to the expansion width, and then contracts to the glue outlet width.

[0011] As a further improvement to the above technical solution:

[0012] The ratio of the cross-sectional area of ​​the glue inlet to the cross-sectional area of ​​the glue outlet is A, where 1 < A ≤ 1.2.

[0013] The ratio of the cross-sectional area at the expansion width position to the cross-sectional area of ​​the inlet is B, where 1 < B ≤ 1.2.

[0014] The inner cavity includes a pair of guide planes arranged opposite each other, and a pair of side edges connecting the two guide planes. The guide planes and side edges are connected in sequence to form an annular structure. The two ends of the annular structure are respectively connected to the glue inlet and the glue outlet. The side edges are symmetrical about the center line.

[0015] The side structure includes an expansion guide and a contraction guide. One end of the expansion guide is connected to the glue inlet, and the other end of the expansion guide is connected to one end of the contraction guide. The other end of the contraction guide is connected to the glue outlet. The cross-sectional width of the cavity at the connection between the expansion guide and the contraction guide is the expansion width.

[0016] The expansion guide is linear, and the expansion angle between the two expansion guides is 75°-95°.

[0017] The shrinkage guide is linear, and the shrinkage angle between the two shrinkage guides is 50°-70°.

[0018] When the glue dispensing width is less than or equal to 50mm, the two guide planes are parallel to each other;

[0019] When the glue dispensing width is greater than 50mm, the included angle between the two guide planes is 8°-15°, and the guide planes adopt a smooth transition structure to connect with the glue dispensing port.

[0020] The expansion guide and the contraction guide are connected by a smooth transition structure, and the contraction guide and the outlet are connected by a smooth transition structure. The connection points between the expansion guide, the contraction guide and the guide plane are all smooth transition structures.

[0021] The main body structure is a split structure, including a first split block and a second split block. A first concave structure is provided on the first split block, and a second concave structure is provided on the second split block. The surfaces of the first concave structure and the second concave structure are coated with an anti-stick coating.

[0022] After the first and second sub-blocks are assembled, the outer edges of the first and second concave structures come into contact to form the glue inlet, glue outlet, and inner cavity.

[0023] An adhesive applicator, comprising the flat-headed adhesive applicator nozzle described in any of the preceding claims.

[0024] The beneficial effects of this utility model are as follows:

[0025] This utility model has a compact and reasonable structure and is easy to operate. By designing the shape of the inner cavity, when the glue flows through the inner cavity, under the guiding effect of the inner cavity, the width of the glue first widens and then narrows to the width of the glue outlet before entering the outlet. This makes the pressure and flow rate of the glue flowing through the outlet more uniform in the straight line direction, thereby ensuring that under the same glue application conditions, the amount of air bubbles in the glue strip is effectively reduced, ensuring the glue application quality while improving the glue application efficiency.

[0026] This utility model also has the following advantages:

[0027] (1) A set of guide planes and a set of side edges guide the glue flowing through the inner cavity from two different directions. The guide planes squeeze the glue from both sides to form a flat shape, while the side edges adjust the width of the two ends of the glue cross-section. When it approaches the glue outlet, the cross-section contracts to squeeze the glue, so that the glue pressure in the inner cavity is uniform, especially the glue pressure in the cross-section adjacent to the glue outlet is uniform, thereby ensuring the consistency of the glue pressure and flow rate entering the glue outlet.

[0028] (2) The two guide planes at an angle realize the transition from the glue inlet to the inner cavity, making the glue easier to spread and diffuse, and facilitating the rapid stabilization of pressure and flow rate in the inner cavity.

[0029] (3) The main body has a split structure, and the inner cavity is coated with an anti-stick coating to facilitate the cleaning of glue in the flat-head glue applicator. Attached Figure Description

[0030] Figure 1 This is an exploded view of the flat-head glue applicator of specification 50 of this utility model.

[0031] Figure 2 This is a cross-sectional view of the flat-head dispensing nozzle of the present invention, specification 50.

[0032] Figure 3 This is an exploded view of the flat-head glue applicator of specification 80 of this utility model.

[0033] Figure 4 This is a cross-sectional view of the flat-head glue applicator of specification 80 of this utility model.

[0034] Figure 5 This is an exploded view of the flat-head glue applicator of specification 110 of this utility model.

[0035] Figure 6 This is a cross-sectional view of the flat-head glue applicator of specification 110 of this utility model.

[0036] Figure 7 This is a fluid simulation diagram of a flat-head dispensing nozzle in the existing technology.

[0037] Figure 8 This is a fluid simulation diagram of the flat-head dispensing nozzle of the present invention, specification 50.

[0038] Figure 9 This is a fluid simulation diagram of the flat-head dispensing nozzle of the present invention, specification 80.

[0039] Figure 10 This is a fluid simulation diagram of the flat-head dispensing nozzle of specification 110 of this utility model.

[0040] Figure 11 This is a comparison diagram of the adhesive strip formed after applying adhesive using the existing technology and the flat-head adhesive applicator of this utility model.

[0041] in:

[0042] 1. Glue inlet;

[0043] 2. Main body structure; 21. First sub-block; 211. Positioning post; 22. Second sub-block;

[0044] 3. Inner cavity; 31. Side; 311. Expansion guide; 312. Contraction guide; 32. Guide plane;

[0045] 4. Glue outlet. Detailed Implementation

[0046] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0047] Example 1:

[0048] like Figures 1-6 As shown, the flat-head glue applicator of this embodiment includes a body structure 2, a glue inlet 1, a glue outlet 4, and an inner cavity 3.

[0049] Body structure 2 is a block structure;

[0050] Inlet 1 is located on one side of the main body structure 2;

[0051] The glue outlet 4 is in the shape of a straight line and is located on the other side of the main body structure 2. The center line of the glue outlet 4 coincides with the center line of the glue inlet 1. The cross-sectional area of ​​the glue outlet 4 is smaller than the cross-sectional area of ​​the glue inlet 1.

[0052] The inner cavity 3 is located inside the main body structure 2 and connects the glue inlet 1 and the glue outlet 4. The cross-sectional width of the inner cavity 3 gradually increases from the glue inlet 1 to the expansion width W1, and then shrinks to the glue outlet width W2 of the glue outlet 4.

[0053] For flat-tipped applicators, the inlet 1 is typically circular. The shape of the inner cavity 3 of the applicator changes from the cross-sectional shape of the glue flow section to the shape of the outlet 4. The cross-section perpendicular to the glue flow direction is the sectional area, and its width is consistent with the straight line direction of the outlet 4. The outlet 4 is generally a rectangular channel structure, and the four corners within the rectangular channel can be chamfered.

[0054] Prior to implementing the embodiments of this application, the applicant conducted numerous experiments and studies, discovering that when the glue application speed was relatively fast, the flow rate and pressure of the glue on the same cross-section were uneven when the glue flowed through the four parts of the glue outlet. Figure 11 As shown in the upper middle image, during the glue application process, air between the glue and the bottom of the box is drawn into the glue, forming air bubbles. This phenomenon is more pronounced when the box is uneven.

[0055] In this embodiment, the flat-head applicator nozzle, by designing the shape of the inner cavity 3, causes the glue to flow through the inner cavity 3. Under the guiding effect of the inner cavity 3, the glue width first widens and then narrows to the glue outlet width W2 before entering the outlet 4. This makes the pressure and flow rate of the glue flowing through the outlet 4 more uniform in the straight line direction, thereby ensuring that under the same glue application conditions, the amount of air bubbles in the glue strip is effectively reduced, ensuring glue application quality while improving glue application efficiency.

[0056] like Figure 11 As shown in the image below, after applying adhesive using the new flat-tip applicator, there are no obvious air bubbles inside the adhesive strip. At the same time, the thickness of the adhesive strip is more uniform, and the ends of the adhesive strip are more flush, improving the bonding effect at the bonding joints.

[0057] Example 2:

[0058] Based on Example 1, the ratio of the cross-sectional area of ​​the glue inlet 1 to the cross-sectional area of ​​the glue outlet 4 is A, where 1 < A ≤ 1.2. The cross-sectional area of ​​the glue outlet 4 is smaller than that of the glue inlet 1, which gives the inner cavity 3 a certain pressure-holding effect, making it easier for the glue to flow in from the glue inlet 1 and diffuse and fill the inner cavity 3.

[0059] Furthermore, the ratio of the cross-sectional area at the expansion width W1 position to the cross-sectional area of ​​the glue inlet 1 is B, where 1 < B ≤ 1.2. This allows the glue to decrease its flow rate at the expansion width W1 position during its flow through the inner cavity 3, and then increase its flow rate at the glue outlet 4, which is beneficial for maintaining consistent pressure and flow rate of the glue in the glue outlet 4.

[0060] Furthermore, the inner cavity 3 includes a pair of guide planes 32 arranged opposite to each other, and a pair of side edges 31 connecting the two guide planes 32. The guide planes 32 and the side edges 31 are connected in sequence to form an annular structure. The two ends of the annular structure are respectively connected to the glue inlet 1 and the glue outlet 4. The side edges 31 are symmetrical about the center line.

[0061] The structure of side 31 includes an expansion guide 311 and a contraction guide 312. One end of the expansion guide 311 is connected to the glue inlet 1, and the other end of the expansion guide 311 is connected to one end of the contraction guide 312. The other end of the contraction guide 312 is connected to the glue outlet 4. The cross-sectional width of the inner cavity 3 at the connection between the expansion guide 311 and the contraction guide 312 is the expansion width W1.

[0062] A set of guide planes 32 and a set of side edges 31 guide the glue flowing through the inner cavity 3 from two different directions. The guide planes 32 squeeze the glue from both sides to form a flat shape, while the side edges 31 adjust the width of the two ends of the glue cross-section. When it approaches the glue outlet 4, the cross-section contracts to squeeze the glue, so that the glue pressure in the inner cavity 3 is uniform, especially the glue pressure in the cross-section adjacent to the glue outlet 4, thereby ensuring the consistency of the glue pressure and flow rate entering the glue outlet 4.

[0063] Furthermore, the expansion guide 311 is linear, and the expansion angle α between the two expansion guides 311 is 75°-95°.

[0064] Furthermore, the shrinkage guide 312 is linear, and the shrinkage angle β between the two shrinkage guides 312 is 50°-70°.

[0065] The straight type means that the extension directions of the expansion guide 311 and the contraction guide 312 are both straight lines, and the expansion guide 311 and the contraction guide 312 can both be planar.

[0066] Limiting the range of expansion angle α and contraction angle β is crucial to prevent them from being too large, which would affect the force between the two edges of the glue and the inner cavity 3 when the glue flows through the expansion width W1, making it difficult to adjust the pressure and flow rate of the glue. It is also important to prevent the expansion angle α and contraction angle β from being too small, which would result in no obvious expansion and contraction effect.

[0067] Furthermore, the expansion guide 311 and the contraction guide 312 are connected by a smooth transition structure, and the contraction guide 312 and the glue outlet 4 are connected by a smooth transition structure. The connection points between the expansion guide 311, the contraction guide 312 and the guide plane 32 are all smooth transition structures.

[0068] Multiple smooth transition structures are designed to ensure that the glue flows through the inner cavity 3 without any dead corners. The smooth transition structures can be rounded chamfers.

[0069] Example 3:

[0070] like Figures 1-2As shown, when the glue outlet width W2 of the glue outlet 4 is small, the glue can easily fill the inner cavity 3. One end of the annular structure connecting to the glue inlet 1 forms a stepped structure with the inlet of the inner cavity 3, causing a sudden change in the cross-sectional area of ​​the glue channel. The other end of the annular structure connecting to the glue outlet 4 forms a stepped structure with the inlet of the glue outlet 4. The two guide planes 32 are parallel to each other, which can achieve consistency in glue pressure and flow rate at the glue outlet 4. Figure 8 As shown.

[0071] When the glue outlet width W2 of the glue outlet 4 is large, in order to ensure that the glue can smoothly enter the inner cavity 3 from the glue inlet 1 and flow smoothly out of the glue outlet 4, while satisfying the above cross-sectional area relationship, the transition from the glue inlet 1 to the inner cavity 3 and from the glue outlet 4 needs to be smoother, such as... Figures 3-6 As shown.

[0072] To optimize manufacturing costs while ensuring the performance of the flat-head dispensing nozzle, the flat-head dispensing nozzle in this embodiment is based on the above embodiments as follows:

[0073] When the glue dispensing width W2 is less than or equal to 50mm, the two guide planes 32 are parallel to each other;

[0074] When the glue dispensing width W2 is greater than 50mm, the included angle γ between the two guide planes 32 is 8°-15°, and the guide plane 32 adopts a smooth transition structure to connect with the glue dispensing port 4.

[0075] When γ is less than 8°, the squeezing and diffusion effect of the guide plane 32 on the glue is not obvious. When γ is greater than 15°, the rate of change of the cross-sectional size of the inner cavity 3 in the direction of glue flow is large, which is not conducive to the stable change of pressure and flow rate in the inner cavity 3.

[0076] like Figure 4 , Figure 6 As shown, the connection between the expansion guide 311 and the glue inlet 1 is also a smooth transition structure.

[0077] When the glue outlet width W2 is large, the two guide planes 32 at an angle realize the transition from the glue inlet 1 to the inner cavity 3, making the glue easier to spread and diffuse, and facilitating the rapid stabilization of pressure and flow rate in the inner cavity 3.

[0078] Figures 1-2 The corresponding flat-head applicator has a glue dispensing width W2 of 50mm, a glue outlet thickness H of 1.5mm, α=90°, β=65°, and γ=0°.

[0079] Figures 3-4 The corresponding flat-head glue applicator has a glue dispensing width W2 of 80mm, a glue outlet thickness H of 2mm, α=85°, β=70°, and γ=10°.

[0080] Figures 5-6 The corresponding flat-head glue applicator has a glue dispensing width W2 of 110mm, a glue outlet thickness H of 2mm, α=85°, β=70°, and γ=13°.

[0081] Figures 8-10 To simulate the fluid flow during the application of adhesive using the above three specifications of flat-head dispensing nozzles using Ansys software, and... Figure 7 The comparison clearly shows that the pressure inside the cavity 3 of the flat-head applicator in this embodiment is more uniform, and the pressure and flow rate of the glue flowing through the outlet 4 are more uniform in the straight line direction, which can achieve... Figure 11 The image below shows the effect of applying the adhesive.

[0082] Example 4:

[0083] To facilitate cleaning of the flat-head glue applicator, the flat-head glue applicator in this embodiment differs from the above embodiment in that the main body structure 2 is a split structure, including a first split block 21 and a second split block 22. The first split block 21 is provided with a first concave structure, and the second split block 22 is provided with a second concave structure. The surfaces of the first concave structure and the second concave structure are coated with an anti-stick coating.

[0084] After the first segment 21 and the second segment 22 are assembled, the outer edges of the first concave structure and the outer edges of the second concave structure come into contact to form the glue inlet 1, the glue outlet 4 and the inner cavity 3.

[0085] The first segment 21 is provided with multiple positioning posts 211, and the second segment 22 is provided with positioning holes corresponding to the positioning posts 211. The positioning posts 211 are located on the first segment 21 on both sides of the first concave structure. The anti-stick coating is made of PTFE material.

[0086] In this embodiment, the main body structure 2 of the flat-head glue applicator is a split structure, and the inner cavity 3 is coated with an anti-stick coating to facilitate the cleaning of glue inside the flat-head glue applicator.

[0087] Example 5:

[0088] This embodiment proposes an adhesive application device, including the flat-head adhesive application nozzle of any of the above embodiments.

[0089] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A flat-headed glue applicator, characterized in that: include Body structure (2), The glue inlet (1) is located on one side of the main body structure (2); The glue outlet (4) is in the shape of a straight line and is located on the other side of the main body structure (2). The center line of the glue outlet (4) coincides with the center line of the glue inlet (1). The cross-sectional area of ​​the glue outlet (4) is smaller than the cross-sectional area of ​​the glue inlet (1). The inner cavity (3) is located inside the main body structure (2) and connects the glue inlet (1) and the glue outlet (4). The cross-sectional width of the inner cavity (3) gradually increases from the glue inlet (1) to the expansion width (W1) and then shrinks to the glue outlet width (W2) of the glue outlet (4).

2. The flat-head applicator nozzle as described in claim 1, characterized in that: The ratio of the cross-sectional area of ​​the glue inlet (1) to the cross-sectional area of ​​the glue outlet (4) is A, where 1 < A ≤ 1.

2.

3. The flat-head applicator nozzle as described in claim 2, characterized in that: The ratio of the cross-sectional area at the expansion width (W1) position to the cross-sectional area of ​​the inlet (1) is B, where 1 < B ≤ 1.

2.

4. The flat-head applicator nozzle as described in claim 1, characterized in that: The inner cavity (3) includes a pair of guide planes (32) arranged opposite to each other, and a pair of side edges (31) connecting the two guide planes (32). The guide planes (32) and side edges (31) are connected in sequence to form an annular structure. The two ends of the annular structure are respectively connected to the glue inlet (1) and the glue outlet (4). The side edges (31) are symmetrical about the center line. The structure of the side (31) includes an expansion guide (311) and a contraction guide (312). One end of the expansion guide (311) is connected to the glue inlet (1), and the other end of the expansion guide (311) is connected to one end of the contraction guide (312). The other end of the contraction guide (312) is connected to the glue outlet (4). The cross-sectional width of the inner cavity (3) at the connection between the expansion guide (311) and the contraction guide (312) is the expansion width (W1).

5. The flat-head applicator nozzle as described in claim 4, characterized in that: The expansion guide (311) is linear, and the expansion angle (α) between the two expansion guides (311) is 75°-95°.

6. The flat-head applicator nozzle as described in claim 4, characterized in that: The shrinkage guide (312) is linear, and the shrinkage angle (β) between the two shrinkage guides (312) is 50°-70°.

7. The flat-head applicator nozzle as described in claim 4, characterized in that: When the glue dispensing width (W2) is less than or equal to 50 mm, the two guide planes (32) are parallel to each other; When the glue outlet width (W2) is greater than 50mm, the included angle (γ) between the two guide planes (32) is 8°-15°, and the guide plane (32) adopts a smooth transition structure to connect with the glue outlet (4).

8. The flat-head glue applicator as described in claim 4, characterized in that: The expansion guide (311) and the contraction guide (312) are connected by a smooth transition structure, and the contraction guide (312) and the glue outlet (4) are connected by a smooth transition structure. The connection between the expansion guide (311), the contraction guide (312) and the guide plane (32) is a smooth transition structure.

9. The flat-head applicator nozzle as described in claim 1, characterized in that: The main body structure (2) is a split structure, including a first split block (21) and a second split block (22). A first concave structure is provided on the first split block (21), and a second concave structure is provided on the second split block (22). The surfaces of the first concave structure and the second concave structure are coated with an anti-stick coating. After the first sub-block (21) and the second sub-block (22) are assembled, the outer edges of the first concave structure and the outer edges of the second concave structure come into contact to form the glue inlet (1), glue outlet (4) and inner cavity (3).

10. An adhesive coating device, characterized in that: Includes the flat-head applicator as described in any one of claims 1-9.

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