A test method for evaluating ultrasonic weld strength of polymers

Abstract

The present application relates to the field of welding strength test, disclose a kind of for evaluating polymer ultrasonic welding strength sample and its test method, it includes first welding sample, second welding sample, third welding sample and fourth welding sample, first welding sample has first clamping portion and first welding portion arranged in steps, second welding sample has second clamping portion and second welding portion arranged in steps, third welding sample has third clamping portion and third welding portion arranged vertically, fourth welding sample has fourth clamping portion and fourth welding portion arranged vertically, first welding portion is equipped with first energy guide line, third welding portion is equipped with second energy guide line.The beneficial effects of the present application are: the sample structure is simple, convenient to form, can realize the purpose of evaluating the ultrasonic welding strength of material in two welding surface directions simultaneously, more consistent with the application scenario of client, the test result is more accurate.

Description

Technical Field

[0001] This invention relates to the field of welding strength testing, and in particular to a specimen and its testing method for evaluating the ultrasonic welding strength of polymers. Background Technology

[0002] When ultrasound acts on the contact surfaces of thermoplastic plastics, it generates high-frequency vibrations of tens of thousands of times per second. These high-frequency vibrations, reaching a certain amplitude, transmit ultrasonic energy to the welding area through the upper welding component. Due to the high acoustic impedance at the welding area (the interface between the two welded parts), localized high temperatures are generated. Furthermore, because plastics have poor thermal conductivity, the heat cannot dissipate quickly and accumulates in the welding area, causing the contact surfaces of the two plastics to melt rapidly. With the application of pressure, they fuse together. After the ultrasound stops, the pressure is maintained for a few seconds to allow solidification, thus forming a strong molecular chain and achieving the welding purpose – this is ultrasonic welding. To evaluate the strength of ultrasonic welds, a test strip can be used. However, existing test strips for polymer ultrasonic welding can only test the weld strength along the direction of the weld contact surface, and cannot comprehensively evaluate the weld strength perpendicular to the weld contact surface. Therefore, they cannot accurately reflect the actual welding scenario of the customer's injection molded parts, affecting the evaluation of weld strength. Therefore, there is an urgent need for a new type of test strip and its testing method for evaluating the strength of polymer ultrasonic welds to solve the above problems. Summary of the Invention

[0003] The primary objective of this application is to provide a sample for evaluating the ultrasonic welding strength of polymers. This sample can test the welding strength along the direction of the welding contact surface and the welding strength perpendicular to the welding contact surface, thus better reflecting the actual welding condition of the customer's injection molded parts.

[0004] The primary objective of this application is achieved through the following technical solution:

[0005] A sample for evaluating the ultrasonic welding strength of polymers includes: a first welding sample, a second welding sample, a third welding sample, and a fourth welding sample. The first welding sample has a first welding surface, the second welding sample has a second welding surface, and a first energy-conducting line is provided on the first welding surface or the second welding surface. The first welding surface and the second welding surface can be butt-welded, and the sample is used to test the welding strength parallel to the direction of the welding contact surface.

[0006] The third welding sample has a third welding surface, and the fourth welding sample has a fourth welding surface. A second energy-conducting line is provided on the third welding surface or the fourth welding surface. The third welding surface and the fourth welding surface can be butt-welded to test the welding strength in the direction perpendicular to the welding contact surface.

[0007] In some embodiments of this application, the first welding sample has a first clamping part and a first welding part, the first clamping part and the first welding part are arranged in a stepped manner, and the height of the first clamping part is greater than that of the first welding part; the second welding sample has a second clamping part and a second welding part, the second clamping part and the second welding part are arranged in a stepped manner, and the height of the second clamping part is greater than that of the second welding part; the first welding surface is located on the first welding part, and the second welding surface is located on the second welding part.

[0008] The third welding sample has a third clamping part and a third welding part, both of which are plate structures, and the third clamping part and the third welding part are arranged perpendicularly. The fourth welding sample has a fourth clamping part and a fourth welding part, both of which are plate structures, and the fourth clamping part and the fourth welding part are arranged perpendicularly. The third welding surface is located on the third welding part, and the fourth welding surface is located on the fourth welding part.

[0009] In some embodiments of this application, the first welding portion includes a first inclined surface connected to the first welding surface, the first energy-conducting line is disposed on the first welding surface, the first inclined surface is located at one end of the first welding surface away from the first clamping portion, and the height of the first inclined surface gradually decreases from the connection end of the first welding surface and the first inclined surface to the other end of the first inclined surface.

[0010] The second welding part includes a second inclined surface connected to the second welding surface. The second inclined surface is located at one end of the second welding surface away from the second clamping part, and the height of the second inclined surface gradually decreases from the connection end of the second inclined surface and the second welding surface to the other end of the second inclined surface.

[0011] In some embodiments of this application, the welding surface edge of the first welding part is provided with a first chamfer, and the welding surface edge of the second welding part is provided with a second chamfer;

[0012] The welding surface edge of the third welding part is provided with a third chamfer, and the welding surface edge of the fourth welding part is provided with a fourth chamfer.

[0013] In some embodiments of this application, the third welding part includes a third connecting plate and a third welding plate, the third welding plate, the third connecting plate and the third clamping part are connected in sequence, the second energy-conducting line is disposed on the third welding plate, the third chamfer is located on the third welding plate, and the area of ​​the third welding plate is smaller than the area of ​​the third connecting plate;

[0014] The fourth welding part includes a fourth connecting plate and a fourth welding plate. The fourth welding plate, the fourth connecting plate and the fourth clamping part are connected in sequence. The fourth chamfer is located on the fourth welding plate, and the area of ​​the fourth welding plate is smaller than the area of ​​the fourth connecting plate.

[0015] In some embodiments of this application, the first energy guide line has a fifth chamfer at both ends, and the second energy guide line has a sixth chamfer at both ends.

[0016] In some embodiments of this application, the first energy-conducting line is located in the middle of the first welding surface or the middle of the second welding surface, and the second energy-conducting line is located in the middle of the third welding surface or the middle of the fourth welding surface.

[0017] In some embodiments of this application, the connecting surface between the first clamping part and the first welding part is a first connecting surface, and the height of the first connecting surface gradually decreases from the first clamping part to the first welding part.

[0018] The connection surface between the second clamping part and the second welding part is the second connection surface, and the height of the second connection surface gradually decreases from the second clamping part to the second welding part.

[0019] In some embodiments of this application, the length of the first inclined surface is 1 / 4 to 1 / 2 of the length of the first welded part, and the length of the second inclined surface is 1 / 4 to 1 / 2 of the length of the second welded part.

[0020] A second objective of this application is to provide a test method for evaluating the strength of ultrasonic welding of polymers, which uses the specimen as described above and includes the following steps:

[0021] The first weld sample, the second weld sample, the third weld sample, and the fourth weld sample are injection molded using a gating system;

[0022] The first welding surface and the second welding surface are joined together and ultrasonic welding is performed.

[0023] Pull-out force tests were performed on the first and second welded samples on a testing machine.

[0024] The third welding surface and the fourth welding surface are joined together and ultrasonic welding is performed.

[0025] Pull-out force tests were performed on the third and fourth welded samples on a testing machine.

[0026] This application discloses a specimen and its test method for evaluating the ultrasonic welding strength of polymers. The first and second weld specimens can be used to test the welding strength along the welding contact surface direction. The first clamping part and the first weld part, as well as the second clamping part and the second weld part, are arranged in a stepped manner. The first energy-conducting line on the first weld part allows for convenient and quick welding connection between the first and second weld parts, resulting in a simple structure and easy molding. The third and fourth weld specimens can be used to test the welding strength perpendicular to the welding contact surface direction. The third clamping part and the third weld part, as well as the fourth clamping part and the fourth weld part, are arranged perpendicularly. The second energy-conducting line on the third weld part allows for convenient and quick welding connection between the third and fourth weld parts, resulting in a simple structure and easy molding. This method simultaneously achieves the effect of evaluating the ultrasonic welding strength of materials in two welding surface directions, better aligning with the client's application scenarios and providing more accurate test results. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the spline in this application;

[0028] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0029] In the figure, 1. First welded sample; 11. First clamping part; 12. First welded part; 121. First welded surface; 122. First inclined surface; 123. First chamfer; 13. First connecting surface; 2. Second welded sample; 21. Second clamping part; 22. Second welded part; 221. Second welded surface; 222. Second inclined surface; 223. Second chamfer; 23. Second connecting surface; 3. Third welded sample; 31. Third clamping part; 32. Third welding section; 321, Third chamfer; 322, Third connecting plate; 323, Third welding plate; 324, Third welding surface; 4, Fourth welding sample; 41, Fourth clamping section; 42, Fourth welding section; 421, Fourth chamfer; 422, Fourth connecting plate; 423, Fourth welding plate; 424, Fourth welding surface; 5, First energy guide line; 51, Fifth chamfer; 6, Second energy guide line; 61, Sixth chamfer; 7, Gating system. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0031] In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] like Figure 1 , 2 As shown, the first embodiment of this application proposes a sample for evaluating the ultrasonic welding strength of polymers, including: a first welding sample 1, a second welding sample 2, a third welding sample 3 and a fourth welding sample 4. The first welding sample 1 has a first welding surface 121, the second welding sample 2 has a second welding surface 221, and a first energy-conducting line 5 is provided on the first welding surface 121 or the second welding surface 221. The first welding surface 121 and the second welding surface 221 can be butt-welded to test the welding strength parallel to the direction of the welding contact surface.

[0033] The third welding sample 3 has a third welding surface 324, and the fourth welding sample 4 has a fourth welding surface 424. A second energy conduction line 6 is provided on the third welding surface 324 or the fourth welding surface 424. The third welding surface 324 and the fourth welding surface 424 can be butt-welded to test the welding strength perpendicular to the welding contact surface direction.

[0034] Based on the above technical solution, the first welding sample 1 and the second welding sample 2 can be used to test the welding strength along the direction of the welding contact surface. The first energy conduction line 5 can ensure the welding quality of the first welding sample 1 and the second welding sample 2, and facilitate the welding connection of the first welding sample 1 and the second welding sample 2. The third welding sample 3 and the fourth welding sample 4 can be used to test the welding strength in the direction perpendicular to the welding contact surface. The second energy conduction line 6 can ensure the welding quality of the third welding sample 3 and the fourth welding sample 4, and facilitate the welding connection of the third welding sample 3 and the fourth welding sample 4, ensuring that the welding strength test in both directions can be carried out smoothly.

[0035] In some embodiments of this application, such as Figure 1 , 2As shown, the first welding sample 1 has a first clamping part 11 and a first welding part 12. The first clamping part 11 and the first welding part 12 are arranged in a stepped manner, and the height of the first clamping part 11 is greater than that of the first welding part 12. The second welding sample 2 has a second clamping part 21 and a second welding part 22. The second clamping part 21 and the second welding part 22 are arranged in a stepped manner, and the height of the second clamping part 21 is greater than that of the second welding part 22. The first welding surface 121 is located on the first welding part 12, and the second welding surface 221 is located on the second welding part 22.

[0036] The third welding sample 3 has a third clamping part 31 and a third welding part 32, both of which are plate structures, and the third clamping part 31 and the third welding part 32 are arranged perpendicularly. The fourth welding sample 4 has a fourth clamping part 41 and a fourth welding part 42, both of which are plate structures, and the fourth clamping part 41 and the fourth welding part 42 are arranged perpendicularly. The third welding surface 324 is located on the third welding part 32 and the fourth welding surface 424 is located on the fourth welding part 42.

[0037] The first welded sample 1 and the second welded sample 2 can be used to test the welding strength along the direction of the welding contact surface. The first clamping part 11, the first welding part 12, the second clamping part 21, and the second welding part 22 are all arranged in a stepped shape. The first energy conduction line 5 on the first welding part 12 can be used to conveniently and quickly achieve the welding connection between the first welding part 12 and the second welding part 22. The structure is simple and easy to form. The third welded sample 3 and the fourth welded sample 4 can be used to test the welding strength in the direction perpendicular to the welding contact surface. The third clamping part 31, the third welding part 32, the fourth clamping part 41, and the fourth welding part 42 are arranged vertically. The second energy conduction line 6 on the third welding part 32 can be used to conveniently and quickly achieve the welding connection between the third welding part 32 and the fourth welding part 42. The structure is simple and easy to form.

[0038] In some embodiments of this application, such as Figure 1As shown, the first welding part 12 includes a first inclined surface 122 connected to the first welding surface 121, the first energy-conducting line 5 is disposed on the first welding surface 121, the first inclined surface 122 is located at one end of the first welding surface 121 away from the first clamping part 11, and the height of the first inclined surface 122 gradually decreases from the connection end of the first welding surface 121 and the first inclined surface 122 to the other end of the first inclined surface 122; the second welding part 22 includes a second inclined surface 222 connected to the second welding surface 221, the second inclined surface 222 is located at one end of the second welding surface 221 away from the second clamping part 21, and the height of the second inclined surface 222 gradually decreases from the connection end of the second inclined surface 222 and the second welding surface 221 to the other end of the second inclined surface 222. Both the first inclined surface 122 and the second inclined surface 222 are designed to be lowered to avoid gaps, which ensures that when the first welded part 12 and the second welded part 22 are joined, only the first welded surface 121 and the second welded surface 221 are in contact. This prevents the first inclined surface 122 and the second inclined surface 222 from lifting up during injection molding, which would cause the first inclined surface 122 and the second inclined surface 222 to weld together and affect the welding tensile test results.

[0039] In some embodiments of this application, such as Figure 2 As shown, the welding surface edge of the first welding part 12 is provided with a first chamfer 123, the welding surface edge of the second welding part 22 is provided with a second chamfer 223, the welding surface edge of the third welding part 32 is provided with a third chamfer 321, and the welding surface edge of the fourth welding part 42 is provided with a fourth chamfer 421. The first chamfer 123, the second chamfer 223, the third chamfer 321, and the fourth chamfer 421 are all oblique angle clearance designs, which can ensure the flatness of each welding surface and ensure that only the energy conduction wire is welded during welding, avoiding the chamfer position from lifting up, or the error during the injection molding of the sample causing the unnecessarily welded position to be welded, which would affect the welding tensile test results.

[0040] In some embodiments of this application, such as Figure 1 , 2As shown, the third welding part 32 includes a third connecting plate 322 and a third welding plate 323. The third welding plate 323, the third connecting plate 322, and the third clamping part 31 are connected in sequence. The second energy-conducting line 6 is disposed on the third welding plate 323. The third chamfer 321 is located on the third welding plate 323, and the area of ​​the third welding plate 323 is smaller than the area of ​​the third connecting plate 322. The fourth welding part 42 includes a fourth connecting plate 422 and a fourth welding plate 423. The fourth welding plate 423, the fourth connecting plate 422, and the fourth clamping part 41 are connected in sequence. The fourth chamfer 421 is located on the fourth welding plate 423, and the area of ​​the fourth welding plate 423 is smaller than the area of ​​the fourth connecting plate 422. Setting the welding plate to protrude from the connecting plate reduces the welding area, avoiding an excessively large welding area from affecting the welding effect and causing inaccurate welding tensile strength tests.

[0041] In some embodiments of this application, such as Figure 2 As shown, the first energy conductor 5 has a fifth chamfer 51 at both ends, and the second energy conductor 6 has a sixth chamfer 61 at both ends. The fifth chamfer 51 and the sixth chamfer 61 at both ends of the energy conductor are preferably set to a larger chamfer, preferably within the range of 120° to 150°, such as 120°, 135°, or 150°. This prevents a large amount of weld slag from overflowing and adhering to the side of the weld surface, thereby altering the weld strength and affecting the test data.

[0042] In some embodiments of this application, such as Figure 1 , 2 As shown, the first energy conductor 5 is located in the middle of the first welding surface 121 or the middle of the second welding surface 221, and the second energy conductor 6 is located in the middle of the third welding surface 324 or the middle of the fourth welding surface 424. Positioning the energy conductors in the middle of the welding surface improves the welding effect and avoids the problem of poor welding on one side leading to poor welding on the other side, thus affecting the test data.

[0043] In some embodiments of this application, such as Figure 1 As shown, the connecting surface between the first clamping part 11 and the first welding part 12 is the first connecting surface 13, and the height of the first connecting surface 13 gradually decreases from the first clamping part 11 to the first welding part 12; the connecting surface between the second clamping part 21 and the second welding part 22 is the second connecting surface 23, and the height of the second connecting surface 23 gradually decreases from the second clamping part 21 to the second welding part 22. The first connecting surface 13 and the second connecting surface 23 can better align the first welding sample 1 and the second welding sample 2 together, preventing molding errors from affecting the alignment of the welding surfaces.

[0044] In some embodiments of this application, such as Figure 1 , 2 As shown, the first clamping part 11 is integrally formed with the first welding part 12, the second clamping part 21 is integrally formed with the second welding part 22, the third clamping part 31 is integrally formed with the third welding part 32, and the fourth clamping part 41 is integrally formed with the fourth welding part 42. The first welding sample 1, the second welding sample 2, the third welding sample 3, and the fourth welding sample 4 are all integrally formed parts. All four welding samples can be injection molded in one operation, resulting in fast processing speed and good molding effect.

[0045] In some embodiments of this application, such as Figure 1 , 2 As shown, the length of the first inclined surface 122 is 1 / 4 to 1 / 2 of the length of the first welded portion 12, and the length of the second inclined surface 222 is 1 / 4 to 1 / 2 of the length of the second welded portion 22. Preferably, the length of the first inclined surface 122 is 1 / 3 of the length of the first welded portion 12, and the length of the second inclined surface 222 is preferably 1 / 3 of the length of the second welded portion 22. This prevents the ends from warping up and facilitates the placement of the energy conductor in the middle of the welded portion, thereby improving the accuracy of the sample welding strength test.

[0046] The second embodiment of this application provides a test method for evaluating the strength of ultrasonic welding of polymers, comprising the following steps:

[0047] The first welding sample 1, the second welding sample 2, the third welding sample 3, and the fourth welding sample 4 are injection molded using the gating system 7;

[0048] The first welding surface 121 and the second welding surface 221 are joined together and ultrasonic welding is performed.

[0049] Pull-out force tests were performed on the first welded sample 1 and the second welded sample 2 on a testing machine;

[0050] The third welding surface 324 and the fourth welding surface 424 are joined together and ultrasonic welding is performed.

[0051] Pull-out force tests were performed on the third welded sample 3 and the fourth welded sample 4 on a testing machine.

[0052] The ultrasonic welding strength test conducted using the above-mentioned test method is easy to operate, yields more accurate and reliable test results, produces excellent weld appearance, and allows for greater flexibility in welding process adjustments.

[0053] In summary, the specimens and test methods for evaluating the ultrasonic welding strength of polymers in this application include a first weld specimen 1 and a second weld specimen 2, which can be used to test the welding strength along the direction of the welding contact surface. The first clamping part 11, the first welding part 12, the second clamping part 21, and the second welding part 22 are all arranged in a stepped shape. The first energy-conducting line 5 on the first welding part 12 can be used to conveniently and quickly achieve the welding connection between the first welding part 12 and the second welding part 22. The structure is simple and easy to form. The third weld specimen 3 and the fourth weld specimen 4 can be used to test the welding strength perpendicular to the direction of the welding contact surface. The third clamping part 31, the third welding part 32, and the fourth clamping part 41 and the fourth welding part 42 are arranged perpendicularly. The second energy-conducting line 6 on the third welding part 32 can be used to conveniently and quickly achieve the welding connection between the third welding part 32 and the fourth welding part 42. The structure is simple and easy to form. At the same time, it achieves the effect of evaluating the ultrasonic welding strength of the material in two welding surface directions, which is more in line with the application scenarios of the client and the test results are more accurate.

[0054] The above are merely preferred embodiments of this application. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A coupon for evaluating the ultrasonic welding strength of a polymer, characterized by, include: The first welding sample, the second welding sample, the third welding sample, and the fourth welding sample are provided. The first welding sample has a first welding surface, the second welding sample has a second welding surface, and a first energy-conducting line is provided on the first welding surface or the second welding surface. The first welding surface and the second welding surface can be butt-welded to test the welding strength parallel to the direction of the welding contact surface. The third welding sample has a third welding surface, the fourth welding sample has a fourth welding surface, and a second energy-conducting line is provided on the third welding surface or the fourth welding surface. The third welding surface and the fourth welding surface can be butt-welded to test the welding strength in the direction perpendicular to the welding contact surface. The first welding sample has a first clamping part and a first welding part, the first clamping part and the first welding part are arranged in a stepped manner, and the height of the first clamping part is greater than that of the first welding part. The second welding sample has a second clamping part and a second welding part, the second clamping part and the second welding part are arranged in a stepped manner, and the height of the second clamping part is greater than that of the second welding part. The first welding surface is located on the first welding part, and the second welding surface is located on the second welding part. The third welding sample has a third clamping part and a third welding part, both of which are plate structures, and the third clamping part and the third welding part are arranged perpendicularly. The fourth welding sample has a fourth clamping part and a fourth welding part, both of which are plate structures, and the fourth clamping part and the fourth welding part are arranged perpendicularly. The third welding surface is located on the third welding part, and the fourth welding surface is located on the fourth welding part. The first welding part includes a first inclined surface connected to the first welding surface, the first energy-conducting line is disposed on the first welding surface, the first inclined surface is located at one end of the first welding surface away from the first clamping part, and the height of the first inclined surface gradually decreases from the connection end of the first welding surface and the first inclined surface to the other end of the first inclined surface. The second welding part includes a second inclined surface connected to the second welding surface. The second inclined surface is located at one end of the second welding surface away from the second clamping part, and the height of the second inclined surface gradually decreases from the connection end of the second inclined surface and the second welding surface to the other end of the second inclined surface. The first energy-conducting line has a fifth chamfer at both ends, and the second energy-conducting line has a sixth chamfer at both ends.

2. A bar for evaluating the ultrasonic welding strength of a polymer according to any one of claims 1, characterized in that, The welding surface edge of the first welding part is provided with a first chamfer, and the welding surface edge of the second welding part is provided with a second chamfer; The welding surface edge of the third welding part is provided with a third chamfer, and the welding surface edge of the fourth welding part is provided with a fourth chamfer.

3. The specimen for evaluating the ultrasonic welding strength of polymers according to claim 2, characterized in that, The third welding part includes a third connecting plate and a third welding plate. The third welding plate, the third connecting plate and the third clamping part are connected in sequence. The second energy-conducting line is disposed on the third welding plate. The third chamfer is located on the third welding plate, and the area of ​​the third welding plate is smaller than the area of ​​the third connecting plate. The fourth welding part includes a fourth connecting plate and a fourth welding plate. The fourth welding plate, the fourth connecting plate and the fourth clamping part are connected in sequence. The fourth chamfer is located on the fourth welding plate, and the area of ​​the fourth welding plate is smaller than the area of ​​the fourth connecting plate.

4. The specimen for evaluating the ultrasonic welding strength of polymers according to claim 1, characterized in that, The first energy-conducting line is located in the middle of the first welding surface or the middle of the second welding surface, and the second energy-conducting line is located in the middle of the third welding surface or the middle of the fourth welding surface.

5. The specimen for evaluating the ultrasonic welding strength of polymers according to claim 1, characterized in that, The connection surface between the first clamping part and the first welding part is the first connection surface, and the height of the first connection surface gradually decreases from the first clamping part to the first welding part. The connection surface between the second clamping part and the second welding part is the second connection surface, and the height of the second connection surface gradually decreases from the second clamping part to the second welding part.

6. The specimen for evaluating the ultrasonic welding strength of polymers according to claim 1, characterized in that, The length of the first inclined surface is 1 / 4 to 1 / 2 of the length of the first welded part, and the length of the second inclined surface is 1 / 4 to 1 / 2 of the length of the second welded part.

7. A test method for evaluating the ultrasonic welding strength of polymers, characterized in that, Using the spline as described in any one of claims 1-6 includes the following steps: The first weld sample, the second weld sample, the third weld sample, and the fourth weld sample are injection molded using a gating system; The first welding surface and the second welding surface are joined together and ultrasonic welding is performed. Pull-out force tests were performed on the first and second welded samples on a testing machine. The third welding surface and the fourth welding surface are joined together and ultrasonic welding is performed. Pull-out force tests were performed on the third and fourth welded samples on a testing machine.

Images