TWI836409B - Ultrasonic welding device and ultrasonic welding method - Google Patents

Abstract

An ultrasonic welding device includes a first component and a second component. The first component includes at least one first welding feature and at least one second welding feature which are arranged along a horizontal direction, and the first and second welding features have different sizes in a vertical direction. The second component has at least one welding structure which is configured to be in contact with the first and second welding features, so as to weld the first and second components.

Description

Ultrasonic welding device and ultrasonic welding method

The present invention relates to a welding device and a welding method, in particular to a welding device and a welding method for ultrasonic welding.

With the innovation and progress of science and technology, various electronic products are constantly being introduced. However, electronic products are easily affected by liquids and may be damaged by moisture, rust, or rust.

In the existing practice, manufacturers often use rubber rings (such as O-shaped rubber rings) as a means of waterproofing to prevent liquid from flowing into the interior of electronic products, and even block gas outside the electronic products. However, the rubber ring will have problems such as deterioration, increased material costs, and inconvenient assembly.

Therefore, how to provide a waterproof device and a manufacturing method thereof that is convenient, simple in manufacturing process, and can effectively block liquids has become a research target that private enterprises and academic institutions have invested a lot of money, manpower, and time in.

In view of this, one object of the present invention is to provide an ultrasonic welding device that can solve the above problems, which includes a first component and a second component. The first component includes at least one first welding feature and at least one second welding feature, wherein the first welding feature and the second welding feature are arranged in a horizontal direction, and the first welding feature and the second welding feature have different sizes in a vertical direction. The second component has at least one welding structure, and the welding structure is configured to contact the first welding feature and the second welding feature to weld the first component and the second component.

In some embodiments of the present invention, at least one first welding feature includes a plurality of first welding features, and at least one second welding feature includes a plurality of second welding features, wherein the plurality of first welding features and the plurality of second welding features are staggered arrangement.

In some embodiments of the invention, each first weld feature contacts adjacent two of a plurality of second weld features.

In some embodiments of the present invention, the ratio of the horizontal width of the first weld feature to the horizontal width of the second weld feature is between 1.5 and 3.

In some embodiments of the invention, the ratio of the vertical height of the first weld feature to the vertical height of the second weld feature is between 1.2 and 6.

Another aspect of the present invention is to provide an ultrasonic welding method, including: providing a welding device, which includes a first component and a second component, wherein the first component includes a first welding feature and a second welding feature, and the first welding feature and The second welding features are arranged along the horizontal direction, and the first welding features and the second welding features have different sizes in the vertical direction. The second member includes at least one welding structure; the first member and the second member are pressed together, so that The welding structure contacts the first welding feature and the second welding feature; and the first component and the second component are welded through the welding structure, the first welding feature, and the second welding feature.

In some embodiments of the present invention, at least one first welding feature includes a plurality of first welding features, and at least one second welding feature includes a plurality of second welding features, wherein the plurality of first welding features and the plurality of second welding features are arranged alternately.

In some embodiments of the present invention, each first welding feature contacts two adjacent ones of the plurality of second welding features.

In some embodiments of the present invention, the ratio of the horizontal width of the first welding feature to the horizontal width of the second welding feature ranges from 1.5 to 3.

In some embodiments of the present invention, the ratio of the vertical height of the first weld feature to the vertical height of the second weld feature is between 1.2 and 6.

In summary, the present invention provides an ultrasonic welding device and an ultrasonic welding method using the same, wherein the ultrasonic welding device includes a first component and a second component for mutual melting and joining, wherein the first component includes a first welding feature and a second welding feature that are different in a vertical direction, and the second component includes a welding structure for contacting the first welding feature and the second welding feature. Thus, the ultrasonic welding device can control the melting direction of the first welding feature and the second welding feature during the ultrasonic welding process, and the ultrasonic welding device has excellent structural strength and provides a supporting effect.

The above description is only used to describe the problems to be solved by the present invention, the technical means to solve the problems, the effects thereof, etc. The specific details of the present invention will be introduced in detail in the following embodiments and related drawings.

The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some commonly used structures and components will be depicted in the drawings in a simple schematic manner.

Please refer to FIG. 1 and FIG. 3 to FIG. 6. In some embodiments of the present invention, the ultrasonic welding device 100 includes a first component 110 and a second component 130. The first component 110 includes at least one first welding feature 111 and at least one second welding feature 113, wherein the first welding feature 111 and the second welding feature 113 are arranged along a horizontal direction (e.g., a first horizontal axis X or a second horizontal axis Y), and the first welding feature 111 and the second welding feature 113 have different sizes in a lead vertical direction (e.g., a lead vertical axis Z). For example, the size of the first welding feature 111 is larger than the size of the second welding feature 113. The second component 130 has at least one welding structure 131, and the welding structure 131 is configured to contact the first welding feature 111 and the second welding feature 113, so as to weld the first component 110 and the second component 130 to each other. In addition, the first horizontal axis X is perpendicular to the second horizontal axis Y, and the lead linear axis Z is perpendicular to the first horizontal axis X and the second horizontal axis Y. After the first welding feature 111 and the second welding feature 113 are fused together, in addition to providing an excellent waterproof function between the first component 110 and the second component 130, the first welding feature 111 with a larger lead linear axis Z dimension can also enhance the structural strength of the first component 110 and the second component 130 after being joined.

Specifically, the first member 110 and the second member 130 may be pressed together and the materials of the first member 110 and/or the second member 130 may be melted together by the kinetic energy generated by the ultrasonic vibration, and then the first member 110 and the second member 130 may be cooled. /or the second member 130, thereby tightly joining the first member 110 and the second member 130. For example, a wave generator can be used to generate high-frequency shock waves of 15 kHz to 20 kHz, and the driving head fixed on the wave generator directly contacts the first member 110, thereby generating friction and local high temperature to cause the first member 110 to and/or the materials of the second member 130 are melted and joined to each other, but the present invention is not limited thereto. In some embodiments of the present invention, the first member 110 and the second member 130 may be made of thermoplastic polymer materials, including polystyrene, polycarbonate, polysulfate, etc., but this invention Inventions are not limited to this.

In addition, the first member 110 is a cover (for example, the first member 110 is circular, triangular, rectangular, square or other polygonal when viewed from top to bottom), and the second member 130 is a shape corresponding to the first member 110 box body (for example, a circular, triangular, rectangular, square or other polygonal groove of the second member 130). The user can align the central axis C1 of the first member 110 with the central axis C2 of the second member 130, and then cover the first member 110 with the second member 130. When the first member 110 is closed on the second member 130, the plurality of first welding features 111 and the plurality of second welding features 113 respectively contact a plurality of welding surfaces. In addition, the second member 130 can restrict the first member 110 in the horizontal direction (for example, the first horizontal axis X and the second horizontal axis Y), and the user can only move the second member 110 along the vertical axis Z. The first member 110 moves out of the second member 130, thereby preventing the first member 110 from shaking due to force and falling out of the second member 130.

In some embodiments of the present invention, the first component 110 includes a plurality of first welding features 111 and a plurality of second welding features 113, wherein the plurality of first welding features 111 and the plurality of second welding features 113 are disposed on the first The outer peripheral portion of the member 110 surrounds the central axis C1 of the first member 110, in which a plurality of first welding features 111 and a plurality of second welding features 113 are alternately and continuously arranged and are centrally symmetrical with respect to the central axis C1, and each first Weld feature 111 contacts two adjacent ones of second plurality of weld features 113 . In addition, the plurality of welding structures 131 are a plurality of welding surfaces surrounding the central axis C2 of the second member 130 , wherein the plurality of welding surfaces are parallel to or inclined to the central axis C2 of the second member 130 , and the plurality of welding surfaces are relative to the central axis C2 Shows central symmetry. Thereby, after the first member 110 and the second member 130 are fused and joined, a complete surrounding waterproof structure WP (please refer to Figure 9) can be formed, thereby providing excellent waterproofing effect and providing the first member 110 and the second member 130 with Excellent structural strength after joining.

Please refer to Figure 7 and Figure 8. The first component 110 includes an alignment portion 115 disposed above the first welding feature 111 and a plurality of second welding features 113 . The welding structure 131 includes a stepped inner wall 131 a , and the alignment portion 115 is configured to resist the step. The shaped inner wall 131a and the stepped inner wall 131a form accommodation spaces with different sizes in the vertical axis Z (please also refer to Figures 5, 7 and 8). Specifically, the alignment portion 115 and the stepped inner wall 131a have a continuous concave and convex structure. The alignment portion 115 is provided on the outer periphery of the first member 110 and surrounds the central axis C1 of the first member 110. The stepped inner wall 131a is provided with At the groove opening O of the second member 130, the stepped inner wall 131a surrounds the central axis C2 of the second member 130, so that the alignment portion 115 and the stepped inner wall 131a are aligned with each other and cover the first member 110. When closed to the second member 130, an accommodating space for the ultrasonic melting process is formed. In addition, the alignment portion 115 and the stepped inner wall 131a may be, for example, a continuous spiked concave-convex structure or a continuous arcuate concave-convex structure, but the invention is not limited thereto. When the alignment portion 115 and the stepped inner wall 131a have a continuous concave-convex structure and the contact area is small, the first member 110 can be effectively heated and fused with the second member 130 .

In some embodiments of the present invention, the first welding feature 111 and the second welding feature 113 are generally in the shape of a long strip (e.g., a rectangle), wherein the horizontal width W1 of the first welding feature 111 is between 1.5 mm and 6 mm. In other embodiments, the horizontal width W1 is between 2.5 mm and 4.5 mm. In other embodiments, the horizontal width W1 is between 3 mm and 3.5 mm. In some embodiments of the present invention, the horizontal width W2 of the second welding feature 113 is between 0.5 mm and 3 mm. In other embodiments, the horizontal width W2 of the second welding feature 113 is between 0.5 mm and 2.5 mm. In other embodiments, the horizontal width W2 of the second welding feature 113 is between 1 mm and 2 mm. In other embodiments, the horizontal width W2 of the second welding feature 113 is between 1.5 mm and 1.75 mm. Through the configuration of the horizontal width W1 of the first welding feature 111 and the horizontal width W2 of the second welding feature 113, the first welding feature 111 and the second welding feature 113 can be closely contacted with the welding structure 131 and welded to form a waterproof structure WP (see FIG. 9 ), thereby providing an excellent waterproof effect.

In some embodiments of the present invention, the ratio of the horizontal width W1 of the first welding feature 111 to the horizontal width W2 of the second welding feature 113 ranges from 1.5 to 3. In other embodiments, the ratio of the horizontal width W1 of the first welding feature 111 to the horizontal width W2 of the second welding feature 113 ranges from 1.75 to 2.75. In other embodiments, the ratio of the horizontal width W1 of the first welding feature 111 to the horizontal width W2 of the second welding feature 113 ranges from 1.75 to 2.5. Through the proportional configuration of the horizontal width W1 of the first welding feature 111 and the horizontal width W2 of the second welding feature 113, the first welding feature 111 and the second welding feature 113 can closely contact the welding structure 131 and be welded to form a waterproof structure WP ( Please refer to Figure 9), thus providing excellent waterproof effect. In addition, the ratio of the horizontal width W1 to the horizontal width W2 within the above-mentioned range can be more effectively supported between the first member 110 and the second member 130, thereby improving the overall structural support strength.

In some embodiments of the present invention, the vertical height H1 of the first welding feature 111 is between 0.3 mm and 2 mm. In other embodiments, the vertical height H1 of the first weld feature 111 is between 0.4 mm and 1.5 mm. In other embodiments, the vertical height H1 of the first welding feature 111 is between 0.5 mm and 1.2 mm. In some embodiments of the present invention, the vertical height H2 of the second welding feature 113 is between 0.1 mm and 1 mm. In other embodiments, the vertical height H2 of the second welding feature 113 is between 0.1 mm and 0.6 mm. In other embodiments, the vertical height H2 of the second welding feature 113 is between 0.2 mm and 0.5 mm. Through the configuration of the vertical height H1 of the first welding feature 111 and the vertical height H2 of the second welding feature 113, the first welding feature 111 and the second welding feature 113 can effectively control the melting direction during the welding process, thereby forming a waterproof structure WP (Please refer to Figure 9) and provides excellent waterproof effect.

In some embodiments of the present invention, the ratio of the vertical height H1 of the first welding feature 111 to the vertical height H2 of the second welding feature 113 is between 1.2 and 6. In other embodiments, the ratio of the vertical height H1 of the first welding feature 111 to the vertical height H2 of the second welding feature 113 is between 2.5 and 6. In other embodiments, the ratio of the vertical height H1 of the first welding feature 111 to the vertical height H2 of the second welding feature 113 is between 4.5 and 6. Through the proportional configuration of the vertical height H1 of the first welding feature 111 and the vertical height H2 of the second welding feature 113, the first welding feature 111 and the second welding feature 113 can effectively control the melting direction of the material during the ultrasonic welding process, thereby forming a waterproof structure WP (please refer to FIG. 9) and providing an excellent waterproof effect.

The following paragraphs introduce an ultrasonic welding method 200 using the ultrasonic welding device 100. Please refer to Figures 1 to 6. The ultrasonic welding method 200 starts with step 210, wherein step 210 includes providing the ultrasonic welding device 100. The ultrasonic welding device 100 includes a first component 110 and a second component 130, wherein the first component 110 has a plurality of first welding features 111 and a plurality of second welding features 113, the plurality of first welding features 111 and the plurality of second welding features 113 are arranged along a horizontal direction (e.g., a first horizontal axis X or a second horizontal axis Y), and the first welding features 111 and the second welding features 113 have different sizes in the lead linear axis Z. The second component 130 includes a plurality of welding structures 131. Next, the ultrasonic welding method 200 proceeds to step 230, which includes pressing the first component 110 and the second component 130 so that the plurality of welding structures 131 respectively contact the plurality of first welding features 111 and the plurality of second welding features 113. Next, the ultrasonic welding method 200 proceeds to step 250, which includes welding the first component 110 and the second component 130 through the plurality of welding structures 131, the plurality of first welding features 111, and the plurality of second welding features 113, thereby forming a waterproof structure WP surrounding the second component 130.

In some embodiments of the present invention, step 210 includes providing an ultrasonic welding device 100, wherein the first component 110 of the ultrasonic welding device 100 is a cover (e.g., the first component 110 is circular, triangular, rectangular or other polygonal when viewed from top to bottom), and the second component 130 is a box body having a shape corresponding to the appearance of the first component 110 (e.g., the second component 130 has a circular, triangular, rectangular or other polygonal groove). The first component 110 and the second component 130 can be made of thermoplastic polymer materials, such as polystyrene, polycarbonate or polysulfate, but the present invention is not limited thereto. The relevant details of the ultrasonic welding device 100 have been introduced in the previous paragraphs, and therefore will not be repeated.

In some embodiments of the invention, step 230 includes pressing the first member 110 and the second member 130 so that the weld structure 131 contacts the first weld feature 111 and the second weld feature 113 . When the first member 110 is closed on the second member 130, the plurality of first welding features 111 and the plurality of second welding features 113 respectively contact a plurality of welding surfaces. In addition, the second member 130 can restrict the first member 110 in the horizontal direction (for example, the first horizontal axis X and the second horizontal axis Y), and the user can only move the second member 110 along the vertical axis Z. The first member 110 moves out of the second member 130, thereby preventing the first member 110 from shaking due to force and falling out of the second member 130. Relevant details about the first component 110 and the second component 130 have been introduced in the previous paragraphs, so they will not be repeated again.

Please refer to Figures 7 and 8. In some embodiments of the present invention, the first component 110 includes an alignment portion 115, which is disposed above the first welding feature 111 and the second welding feature 113, and the welding structure 131 of the second component 130 is a stepped inner wall 131a. The relevant details about the mutual alignment and contact between the first component 110 and the second component 130 have been introduced in the previous paragraphs, so they will not be repeated.

Step 250 includes welding the first component 110 and the second component 130 through the welding structure 131, the first welding feature 111 and the second welding feature 113. The user can press the first component 110 and the second component 130 and melt the material of the first component 110 and/or the second component 130 by the kinetic energy generated by ultrasonic vibration, and then cool the first component 110 and/or the second component 130, so that the first component 110 and the second component 130 are tightly joined. For example, a high frequency shock wave of 15 kHz to 20 kHz can be generated by a wave generator, and a driving head fixed to the wave generator directly contacts the first component 110, thereby generating friction and local high temperature to melt the materials of the first component 110 and/or the second component 130 and bond them together, but the present invention is not limited to this. The details of the melting and bonding of the first component 110 and the second component 130 have been introduced in the previous paragraphs and will not be repeated here.

In summary, the present invention provides an ultrasonic welding device and an ultrasonic welding method using the same, wherein the ultrasonic welding device includes a first component and a second component for mutual melting and joining, wherein the first component includes a first welding feature and a second welding feature that are different in a vertical direction, and the second component includes a welding structure for contacting the first welding feature and the second welding feature. Thus, the ultrasonic welding device can control the melting direction of the first welding feature and the second welding feature during the ultrasonic welding process, and the ultrasonic welding device has excellent structural strength and provides a supporting effect.

The above description is only used to explain the problem to be solved by the present invention, the technical means for solving the problem, and the effects produced, etc. The specific details of the present invention will be introduced in detail in the following implementation method and related drawings.

100: Ultrasonic welding device

110: First component

111: First welding characteristics

113: Second welding feature

115: Counterpoint Department

130: Second component

131: Welding structure

131a: stepped inner wall

200: Ultrasonic welding method

210,230,250: steps

C1, C2: center axis

H1,H2: vertical height

W1, W2: horizontal width

WP: Waterproof structure

O: Open your mouth

X: first horizontal axis

Y: Second horizontal axis

Z: Lead linear axis

D: dashed box

A-A: Section line

B-B: section line

In order to achieve the above advantages and features, the principles briefly described above will be explained in more detail with reference to embodiments, which are illustrated in the accompanying drawings. These drawings depict the invention by way of example only and therefore do not limit the scope of the invention. The principles of the invention will be explained clearly, and additional features and details will be fully described, by means of the accompanying drawings, in which: Figure 1 is a schematic three-dimensional view of an ultrasonic welding device according to some embodiments of the present invention. Figure 2 illustrates a step flow chart of an ultrasonic welding method according to some embodiments of the present invention. Figure 3 is a schematic three-dimensional view of the first component according to some embodiments of the present invention. Figure 4 is a schematic three-dimensional view of the second component according to some embodiments of the present invention. Figure 5 is a schematic three-dimensional view of an ultrasonic welding device according to some embodiments of the present invention, in which the second component is represented by a dotted line in a perspective state. Figure 6 is an enlarged view based on the dotted box D in Figure 5 . Figure 7 is a cross-sectional view drawn along section line A-A in Figure 5 . Figure 8 is a cross-sectional view drawn along section line B-B in Figure 5 . Figure 9 shows a schematic three-dimensional view of an ultrasonic welding device according to some embodiments of the present invention, in which the second component is represented by a dotted line in a perspective state.

100: Ultrasonic welding device

110: First component

111: The first welding feature

113: Second welding feature

130:Second component

C1, C2: central axis

O: Open your mouth

D: Dashed frame

A-A: section line

B-B: section line

Claims (8)

An ultrasonic welding device includes: a first component including at least one first welding feature and at least one second welding feature, wherein the first welding feature and the second welding feature are arranged along a horizontal direction, and the first welding feature The features and the second weld feature have different dimensions in the vertical direction, wherein the ratio of the horizontal width of the first weld feature to the horizontal width of the second weld feature is between 1.5 and 3; and a second member having at least A welding structure, wherein the welding structure is configured to contact the first welding feature and the second welding feature to weld the first component and the second component. The ultrasonic welding device as described in claim 1, wherein the at least one first welding feature includes a plurality of first welding features, and the at least one second welding feature includes a plurality of second welding features, wherein the first welding features and the second welding features are arranged alternately. An ultrasonic welding device as described in claim 2, wherein each of the first welding features contacts two adjacent ones of the second welding features. The ultrasonic welding device as claimed in claim 1, wherein the ratio of the vertical height of the first welding feature to the vertical height of the second welding feature is between 1.2 and 6. An ultrasonic welding method includes: providing a welding device, including: a first component, including a first welding feature and a second welding feature, wherein the first welding feature and the second welding feature are arranged in a horizontal direction, and the first welding feature and the second welding feature have different sizes in the vertical direction, wherein the ratio of the horizontal width of the first welding feature to the horizontal width of the second welding feature is between 1.5 and 3; and a second component, having at least one welding structure; pressing the first component and the second component so that the welding structure contacts the first welding feature and the second welding feature; and welding the first component and the second component through the welding structure, the first welding feature and the second welding feature. The ultrasonic welding method as described in claim 5, wherein the at least one first welding feature includes a plurality of first welding features, and the at least one second welding feature includes a plurality of second welding features, wherein the first welding features and the second welding features are arranged alternately. An ultrasonic welding method as described in claim 6, wherein each of the first welding features contacts two adjacent ones of the second welding features. The ultrasonic welding method as described in claim 5, wherein the ratio of the vertical height of the first welding feature to the vertical height of the second welding feature is between 1.2 and 6.

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