WO2021212704A1

WO2021212704A1 - Waterproof led lamp strip manufactured by waterproof adhesive, and manufacturing method therefor

Info

Publication number: WO2021212704A1
Application number: PCT/CN2020/109339
Authority: WO
Inventors: 张�林
Original assignee: 王定锋
Priority date: 2020-04-25
Filing date: 2020-08-14
Publication date: 2021-10-28

Abstract

The present invention relates to a waterproof LED lamp strip manufactured by a waterproof adhesive, and a manufacturing method therefor. Specifically, components are attached by means of SMT to a whole roll of connected flexible circuit boards comprising multiple lamp strip circuit boards; the whole roll is unwound on a horizontal suction platform so that the lamp strip circuit boards are suctioned to be flat and level; a dam adhesive is dripped at four board edges of the lamp strip circuit boards to form a surrounding dam, the surrounding dam adhesive having a consistent height, and the height of the dam adhesive being greater than those of the components; then a light-transmitting liquid adhesive is placed in the dam, and then the adhesive applied by using a blade-coating plate, so that the thickness of the adhesive is consistent with the height of the dam, and the adhesive fully covers the components and the surface of the circuit boards; the whole roll of boards is suctioned on the horizontal platform in a standing manner so that the adhesive is cured, then the dam adhesive is removed, and the whole roll is cut into single strips, so as to obtain waterproof LED lamp strips manufactured by the light-transmitting and waterproof adhesive. Regarding two longitudinal (lengthwise) side surfaces of each single lamp strip obtained by cutting, a circuit board side surface and a cured adhesive side surface on each side surface are on a same cutting surface.

Description

LED waterproof light strip made of waterproof glue and manufacturing method thereof

Technical field

The invention relates to the field of light strips, in particular to an LED waterproof light strip made of waterproof glue and a manufacturing method thereof.

Background technique

Nowadays, the waterproof LED light strips in the industry usually adopt the following two methods for waterproofing. One is to dispense glue on the front cover film of a single LED light strip circuit board and the soldered components to form a layer of more components. The thick glue layer is much higher. This method uses a large amount of glue, and the lamp strip circuit board must be covered with high-temperature and expensive PI to pass the reflow soldering, resulting in high material costs and low production efficiency for a single operation.

Another method is to waterproof a single LED strip with glue or sleeve. This method is also the method that the strip circuit board must be covered with high-temperature and expensive PI to pass reflow soldering, plus The material cost of encapsulation or casing is high, and the production efficiency of a single operation is very low.

In order to overcome the above shortcomings and shortcomings, the present invention adopts SMT welded components in the whole roll of conjoined light strips containing multiple bare light strips, and drip dam glue on the four sides of the circuit board of the light strip. The height is higher than the components, and then put the light-transmitting liquid glue into the dam, and then use a squeegee to scrape the glue to make it level. After the glue is cured, it is then divided into a single LED made of light-transmitting and waterproof glue. The waterproof light strip replaces the LED light strip waterproofing in the industry today, the LED light strip is waterproof, and the LED light strip is waterproof, and the material cost is low, and it is produced by combining multiple light strips. Greatly improve the production efficiency.

Summary of the invention

The invention relates to an LED waterproof light strip made of waterproof glue and a manufacturing method thereof. Specifically, a whole roll of conjoined flexible circuit boards containing multiple light strip circuit boards is used, SMT components are pasted, and the whole roll is unrolled On a horizontal adsorption platform, the light strip circuit board is absorbed flat and level. The dam glue is dripped on the four sides of the light strip circuit board to form a dam around it. The height of the dam glue is the same. The height is higher than the height of the components, and then put the transparent liquid glue into the dam, and then scrape the glue with a squeegee to make the thickness of the glue consistent with the height of the dam. The glue fully covers the surface of the components and the circuit board. The coil is adsorbed on the horizontal platform to make the glue solidify, then the dam glue is removed, and then divided into single strips to make LED waterproof light strips made of light-transmitting waterproof glue. The longitudinal direction (long direction) of the single strip The two sides of ), the side of the circuit board on each side and the side of the cured glue are respectively on the same cutting surface.

According to the present invention, there is provided a method for manufacturing LED waterproof light strips made of waterproof glue. Specifically, a whole roll of conjoined flexible circuit boards containing multiple light strip circuit boards is used, and SMT components are pasted to make the whole roll containing One piece of light strips with multiple bare strips, or multiple pieces of one piece of flexible circuit boards containing multiple strips of light strips, SMT pastes the components, and then the multiple pieces are welded end-to-end to form a whole roll containing Multiple strips of conjoined light strips, the whole roll of multiple strips of conjoined strips has a board edge on each of the four sides, unfold the whole roll on a horizontal adsorption platform, so that the strip of circuit board is absorbed smoothly And horizontally, drip the dam glue on the four sides of the circuit board of the light strip to form a dam around it, and the height of the dam glue around it is the same. Then put the transparent liquid waterproof glue into the dam, and then use the squeegee to coat the board. Scrape the waterproof glue. The two ends of the squeegee plate are scraped to the surface of the dam glue. The thickness of the squeegee is controlled by the dam glue to make the thickness of the waterproof glue consistent. After the squeegee is completed, the dam is filled with waterproof glue, and the waterproof glue is The height is the same as the height of the dam. The waterproof glue has completely covered the surface of the components and the circuit board. The whole roll of the board is adsorbed on the horizontal platform to make the glue solidify, then the glue is removed from the dam, and then transferred to the slitting machine to cut into individual lights Strip, the two sides of the longitudinal (long direction) of a single strip of light strips that are cut into, the side of the circuit board on each side and the side of the cured glue are respectively on the same cutting surface.

According to the present invention, there is also provided an LED waterproof light strip made of waterproof glue, including: a flexible circuit board; LED lamp beads or LED lamp beads and control elements; waterproof glue; characterized in that the flexible circuit board is a single layer The circuit board of the circuit or the circuit board of the double-layer circuit, the LED lamp beads or the LED lamp beads and the control components are soldered on the surface pads of the circuit board. The waterproof glue is a light-transmitting waterproof glue, and the waterproof glue forms a cured soft waterproof Glue, waterproof glue fully covers the LED, or fully covers the LED and control components, the waterproof glue is glued to the upper surface of the circuit board, the waterproof glue is glued to the LED lamp bead or the LED lamp bead and the control element, the lamp The two sides of the strip facing the longitudinal direction (long direction), the side of the flexible circuit board and the side of the waterproof glue on each side are respectively on the same cutting surface, and the light strip is in a straight state at the position where the light strip is not soldered. Bottom, the upper surface and the two sides of the waterproof glue are flat, the angles of the inner angles formed by the upper surface and the two sides are both greater than 75 degrees and less than 105 degrees, and the thickness of the waterproof glue of the light strip is greater than or equal to 0.2mm, Less than or equal to 6.0mm.

According to a preferred embodiment of the present invention, the LED waterproof light strip made of waterproof glue is characterized in that the length of the LED waterproof light strip is greater than or equal to 1.0 meter.

According to a preferred embodiment of the present invention, the LED waterproof light strip made of waterproof glue is characterized in that the LED waterproof light strip is composed of a plurality of periodic circuits, and each period has the same circuit. The components of each cycle are the same, there is a cutting position during each cycle, and the cutting position can be cut and used. The cutting position is designed with a metal connection point, which is used for interconnection between multiple light strips. The connection point, or/and the connection point used to connect to the power supply, the metal connection point is on the front or/and the back. When there is a metal connection point on the front, the metal connection point has been covered by waterproof glue. It can be peeled off or Remove the waterproof glue and use it.

According to a preferred embodiment of the present invention, the LED waterproof light strip made of waterproof glue is characterized in that double-sided tape can be pasted on the back of multiple connected light strips, and then divided into single light strips , Double-sided tape plays the role of waterproof and moisture-proof, insulation and paste and fixation during installation and use. On both sides of the longitudinal (long direction) of the light strip, the waterproof tape, circuit board, and double-sided tape are respectively on a cutting surface.

According to a preferred embodiment of the present invention, the LED waterproof light strip made of waterproof glue is characterized in that the waterproof glue is a light-permeable waterproof glue.

According to a preferred embodiment of the present invention, the LED waterproof light strip made of waterproof glue is characterized in that a layer of waterproof resin can be wrapped around the long direction of the light strip to make a higher grade Waterproof light strip.

In the following description of the drawings and specific embodiments, details of one or more embodiments of the present invention will be explained.

Description of the drawings

The features, purposes and advantages of the present invention will become more apparent by reading this specification in conjunction with the following drawings. A brief description of the drawings is as follows.

Figure 1 is a schematic plan view of a flexible circuit board.

Fig. 2 is a schematic plan view of a plurality of connected bare light strips formed after the LED lights are soldered on the flexible circuit board.

Figure 3 is a schematic cross-sectional view of a plurality of connected bare light strips formed after the LED lights are soldered on the flexible circuit board.

Fig. 4 is a three-dimensional schematic diagram of a plurality of connected bare light strips formed after LED lamps are soldered on a flexible circuit board.

Figure 5 is a three-dimensional schematic diagram of the adsorption platform.

Figure 6 is a three-dimensional schematic diagram of the entire roll of bare light strips being unfolded and placed on the adsorption platform, and dam glue of the same height is pasted on the four sides of the flexible circuit board.

Figure 7 is a three-dimensional schematic diagram of a connected LED waterproof light strip made of light-permeable waterproof glue after removing the dam glue.

Figure 8 is a schematic cross-sectional view of an LED waterproof light strip made of light-permeable waterproof glue.

Figure 9 is a schematic cross-sectional view of an LED waterproof light strip made of light-permeable waterproof glue with double-sided tape on the back.

Fig. 10 is a three-dimensional schematic diagram of a LED waterproof light strip made of light-transmitting waterproof glue that is cut into single strips.

Figure 11 shows the LED waterproof light strips made of light-transmitting and waterproof glue after being cut into single strips. On both sides of the light strip facing the longitudinal direction (long direction), the side of the flexible circuit board and the side of the waterproof glue are on each side. Schematic diagram of the cross section on the same cutter surface.

Fig. 12 is a schematic cross-sectional view of the LED waterproof light strip made of light-permeable and waterproof glue wrapped with a layer of waterproof resin around the length of the LED waterproof light strip to make a higher-level waterproof light strip.

Fig. 13 is a schematic diagram of a transverse cross-section of a single LED waterproof light strip made of light-transmitting waterproof glue.

Detailed ways

Hereinafter, the present invention will be described in detail by taking a preferred embodiment as an example.

However, those skilled in the art should understand that the following descriptions are merely examples to illustrate and describe some preferred embodiments, and do not have any limitation on the claims of the present invention.

Using the traditional circuit board manufacturing process, the flexible copper clad board is screen-printed circuit anti-corrosion ink, baked, cured, etched, film-removed, screen-printed front ink solder mask, exposed component pad 1.1 and metal connection point 1.2, baked and printed characters , Bake curing, OSP anti-oxidation surface treatment and other processes are made into a flexible circuit board 1 (as shown in Fig. 1). In this step, the label 1 in Fig. 1 indicates that it is a flexible single-sided circuit board.

Or the double-sided flexible copper-clad board is drilled, copper-immersed, copper-plated, dry-filmed, exposed, etched, film-removed, and screen printed on the front ink solder mask to expose the component pad 1.1 and the metal connection point 1.2, and bake , Then screen printing the back ink solder mask, baking, characters, baking, OSP anti-oxidation surface treatment and other processes to make a flexible circuit board 1 (as shown in Figure 1), in this step, the mark 1 in Figure 1 indicates that it is flexible Double-sided circuit board.

Using the traditional SMT placement process, on the solder paste printer, the solder paste is printed on the component pad 1.1 of the flexible circuit board 1 with a stencil, and then the LED lamp beads 2.1 and resistor 2.2 are correspondingly mounted on the printed solder paste Solder the LED lamp beads 2.1 and resistor 2.2 to the flexible circuit board 1 by reflow soldering on the soldering pad 1.1 to make multiple connected bare strips with LED lamps (as shown in Figure 2, Figure 3, Shown in Figure 4).

Adjust the level of the adsorption platform 5 (as shown in Figure 5), and then unfold the whole roll of connected bare light strips and place them on the adjusted level of the adsorption platform 5, and then apply a vacuum to absorb the connected bare light strips evenly. Level again, and then drip the dam glue 6 on the 4 board edges of the flexible circuit board 1. The height of the dam glue 6 is higher than the height of the LED lamp beads 2.1 and the resistance 2.2, forming a dam with the same height (as shown in Figure 6) ), then put the transparent liquid glue into the dam, scrape the glue 3 with a squeegee plate, scrape the two ends of the squeegee plate to the surface of the dam glue, and control the thickness of the scraping glue by the dam glue to make the thickness of the glue 3 consistent , After the squeegee is completed, the dam is filled with glue 3, and the height of the glue 3 is the same as the height of the dam. The glue 3 covers the LED lamp beads 2.1 and the resistance 2.2, and then stands still on the adsorption platform 5 to cure the glue 3 Next, remove the dam glue 6 and make a one-piece LED waterproof light strip made of light-permeable waterproof glue (as shown in Figure 7 and Figure 8). You can stick double-sided tape 4 on the back of the LED waterproof light strip, double The surface glue 4 plays a role of waterproofing, moisture-proofing, insulating, and sticking and fixing during installation and use (as shown in Figure 9).

The one-piece LED waterproof light strip made of light-transmitting waterproof glue is transferred to the slitting machine and cut into single strips, made into LED waterproof light strips made of light-transmitting waterproof glue (as shown in Figure 10), and cut into single strips The LED waterproof light strip made of light-transmitting waterproof glue has two sides in the longitudinal direction (ie the long direction), namely the side 1.3a and the side 1.3b, the side of the flexible circuit board 1 on each side and the cured glue The sides of 3 are on the same cutting surface (as shown in Figure 11 and Figure 13).

According to needs, a single LED waterproof light strip made of light-transmitting waterproof glue as shown in Figure 10 can be wrapped with a layer of waterproof resin 5 around the long direction to make a higher-level LED waterproof light strip (such as Shown in Figure 12).

In the present invention, the whole roll of connected light strips containing multiple bare light strips with SMT welded components is used, and the dam glue is applied to the four sides of the circuit board of the light strip. The height of the dam glue is higher than the components, and then the Light-transmitting liquid glue is put into the dam, and then the glue is applied with a squeegee to make it level. After the glue is cured, it is cut into a single LED waterproof light strip made of light-transmitting waterproof glue, replacing the current industry The LED lights are waterproof with epoxy resin, the LED lights are waterproof with rubber, and the LED lights are waterproof with sleeves. The material cost is low, and multiple lights are assembled together to produce and produce, which greatly improves the production efficiency.

The invention has been described in detail above with reference to a specific embodiment of an LED waterproof light strip made of waterproof glue in conjunction with the accompanying drawings. However, those skilled in the art should understand that the above descriptions are merely examples to illustrate and describe some specific embodiments, and do not have any limitation on the scope of the present invention, especially the scope of the claims.

Claims

A method for making LED waterproof light strips made of waterproof glue. Specifically, a whole roll of conjoined flexible circuit boards containing multiple strips of light strips is used, and SMT components are pasted to become a whole roll of strips containing multiple bare strips. One piece of light strips, or multiple single piece of flexible circuit boards containing multiple light strip circuit boards, SMT paste the components, and then multiple single pieces of end-to-end welding to form a whole roll containing multiple bare light strips The four sides of the circuit board of the whole roll of multiple bare strips have a board edge. Unfold the whole roll on a horizontal adsorption platform, so that the lamp strip circuit board is absorbed flat and level. The four sides of the circuit board of the light strip are dripped with dam glue to form a dam around them, and the height of the dam glue is the same. Then put the transparent liquid waterproof glue into the dam, and then use the squeegee to scrape the waterproof glue. The two ends of the squeegee plate are scraped to the surface of the dam glue. The thickness of the squeegee is controlled by the dam glue to make the thickness of the waterproof glue consistent. After the squeegee is completed, the dam is filled with waterproof glue, and the height of the waterproof glue is equal to the height of the dam. Consistent, the waterproof glue has completely covered the surface of the components and the circuit board. The whole roll of the board is adsorbed on the horizontal platform to make the glue solidify, then the dam glue is removed, and then transferred to the slitting machine to cut into a single light strip, and then cut into The two sides of the single light strip in the longitudinal direction (long direction), the side of the circuit board on each side and the side of the cured glue are respectively on the same cutting surface.
A waterproof LED light strip made of waterproof glue, including:

Flexible circuit board;

LED lamp beads or LED lamp beads and control components;

waterproof glue;

It is characterized in that the flexible circuit board is a circuit board with a single-layer circuit or a circuit board with a double-layer circuit, LED lamp beads or LED lamp beads and control elements are soldered on the surface pads of the circuit board, and the waterproof glue is light-transmissive Waterproof glue, the water-proof glue forms a cured soft waterproof glue, the waterproof glue fully covers the LED, or the LED and the control components, the waterproof glue is glued to the upper surface of the circuit board, and the waterproof glue is glued to the LED lamp beads or It is glued to the LED lamp beads and control components. The two sides of the lamp strip facing the longitudinal direction (long direction). The side of the flexible circuit board and the side of the waterproof glue on each side are respectively on the same cutting surface. For the position of the unsoldered components, when the light strip is in a straight state, the upper surface and two side surfaces of the waterproof glue are flat. The angles of the inner angles formed by the upper surface and the two side surfaces are both greater than 75 degrees and less than 105 degrees, respectively. The thickness of the waterproof glue of the belt is greater than or equal to 0.2mm and less than or equal to 6.0mm.
The LED waterproof light strip made of waterproof glue according to claim 1 or 2, characterized in that the length of the LED waterproof light strip is greater than or equal to 1.0 meter.
The LED waterproof light strip made of waterproof glue according to claim 1 or 2, characterized in that, the LED waterproof light strip is composed of multiple periodic circuits, each of which has the same circuit, and each periodic element The device is the same, there is a cutting position during each cycle, and the cutting position can be cut and used. The cutting position is designed with a metal connection point, which is a connection point used for interconnection between multiple light strips. , Or/and is the connection point used to connect to the power supply. The metal connection point is on the front or/and back. When there is a metal connection point on the front, the metal connection point has been covered by waterproof glue. You can peel off or remove the waterproof glue when you need to use it. use.
The LED waterproof light strip made of waterproof glue according to claim 1 or 2, characterized in that double-sided tape can be pasted on the back of multiple connected light strips, and then divided into single light strips and double-sided light strips. The glue plays a role of waterproof and moisture-proof, insulation and sticking and fixing during installation and use. On both sides of the longitudinal (long direction) of the light strip, the sides of the waterproof glue, the circuit board, and the double-sided tape are respectively on a cutting surface.
The LED waterproof light strip made of waterproof glue according to claim 1 or 2, wherein the waterproof glue is a light-permeable waterproof glue.
The LED waterproof light strip made of waterproof glue according to claim 1 or 2, characterized in that a layer of waterproof resin can be wrapped around the long direction of the light strip to make a higher-level waterproof light strip .