Assembly method of membrane switch

Abstract

The invention discloses an assembling method of a membrane switch. The assembling method comprises the following steps: S1, preparing a base material; s2, primary printing of waterproof glue; s3, assembling a semi-finished product; s4, printing the waterproof glue for the second time; and S5, assembling a finished product. The device has the advantages that through an automatic production mode, automatic printing of waterproof glue and upper-layer materials as well as waterproof glue and middle-layer materials, automatic assembly of the upper-layer materials printed with the waterproof glue and the middle-layer materials, and automatic printing of conductive glue on lower-layer materials are realized; and the lower-layer semi-finished product and the second semi-finished product are automatically assembled in the corresponding direction of the conductive adhesive and the waterproof adhesive printed on the middle-layer material, so that the precision of the product can be effectively ensured, the breakage rate and the pollution rate in the product assembling process are reduced, manual finished products are saved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of film manufacturing, and in particular to an assembling method of a film switch. Background Art

[0002] Membrane switches are usually assembled from upper, middle and lower layers of materials. In the existing assembly process, waterproof glue is printed manually or semi-automatically, and the overall material is processed in sheets, resulting in low processing efficiency. It is easy to contaminate each layer of material during the processing, and it also causes a high material loss rate.

[0003] In view of this, it is necessary to provide an assembly method of a membrane switch. Summary of the invention

[0004] The membrane switch assembly method provided by the present invention effectively solves the problems of low efficiency, low yield, and easy contamination of the existing assembly method.

[0005] The technical solution adopted by the present invention is

[0006] The assembly method of the membrane switch is characterized in that it includes the following steps: S1, substrate preparation: preparing an upper layer material, a middle layer material and a lower layer material; S2, primary printing of waterproof glue: printing waterproof glue for avoiding the conductive circuit of the upper layer material on the front of the upper layer material by a roll printing machine to form an upper layer semi-finished product, and rolling up the upper layer semi-finished product; printing conductive glue on a specific conductive circuit on the front of the lower layer material to form a lower layer semi-finished product, and rolling up the lower layer semi-finished product; S3, semi-finished product assembly: automatically pressing and assembling one side of the waterproof glue of the upper layer semi-finished product with the middle layer material to form a No. 1 semi-finished product, and rolling up the No. 1 semi-finished product; S4, secondary printing of waterproof glue: printing waterproof glue on the front of the middle layer material of the No. 1 semi-finished product by a roll printing machine to form a No. 2 semi-finished product, and rolling up the No. 2 semi-finished product; S5, finished product assembly: automatically assembling the lower layer semi-finished product and the No. 2 semi-finished product by an automatic roll laminating machine in a manner in which the conductive glue and the waterproof glue printed on the middle layer material are correspondingly laminated to form a finished product.

[0007] Furthermore, the specific steps of preparing the upper material are as follows: S1101, shrinking: baking the upper PET film coil through a tunnel furnace; S1102, printing silver lines: baking the upper PET film through a snail oven, and printing the silver paste circuit on the front of the upper PET film through a coil printer; S1103, printing carbon oil: printing the carbon oil with only the end of the silver paste circuit exposed through the coil printer silver paste circuit, and drying the carbon oil through a snail oven; S1104, printing UV glue: printing UV glue on the silver paste circuit in a specific area through a coil printer, and drying the UV glue through a snail oven; S1105, printing jump silver: printing jump silver on the UV glue through a coil printer, so that the specific area is isolated The silver paste circuit is turned on, and the silver is dried by a snail oven; S1106, electrical measurement: electrical measurement by a coil function tester; S1107, printing white ink: printing a white ink layer on the reverse side of the upper PET film by a coil printing machine; S1108, printing black ink: printing a black ink layer on the reverse side of the upper PET film that has not been printed with the white ink layer by a coil printing machine, and drying the black ink by a snail oven; S1109, coil coding: coding on the white ink layer by a coil coding machine; S1110, pasting a PIN protection sheet: pasting a PIN protection sheet on the exposed side of the silver paste by a coil laminating machine; S1111, punching: punching the diode mounting hole on the upper PET film by a die-cutting machine.

[0008] Furthermore, the baking temperature of S1101 is 175±5°C, the silver paste printing temperature of S1102 and the carbon oil printing temperature of S1103 are both 155±5°C, the printing temperature of the white ink layer is 120±5°C, and the printing temperature of the black ink layer is 145±5°C.

[0009] Furthermore, the specific steps for preparing the middle layer material are as follows: S1201, shrinking: baking the middle layer PET film coil by a coil printing machine and a snail oven; S1202, punching: punching the diode mounting holes in the middle layer PET film by a die-cutting machine; S1203, dust removal: dust removal and cleaning of the punched middle layer PET film by a cleaning agent.

[0010] Furthermore, the specific steps of preparing the lower layer material are as follows: S1301, shrinking: baking the lower PET film by a snail oven, and rolling the baked lower PET film by a roll printing machine; S1302, printing silver wire: printing the silver paste circuit on the lower PET film by a roll printing machine, and drying the silver paste circuit by a snail oven; S1303, electrical testing: performing electrical testing on the silver paste circuit by a roll function testing machine; S1304, punching: punching the diode mounting hole on the lower PET film.

[0011] Furthermore, the lower PET film processing step also includes S13021, secondary printing of silver dots, located between S1302 and S1303: secondary printing of silver dots at specific positions of the silver paste circuit by a roll printing machine, and drying the silver dots by a snail oven; and S13031, baking, located between S1303 and S1304: secondary baking of the silver dots by a tunnel furnace.

[0012] Furthermore, the baking temperature range of S1301 is 175±5°C, and the silver paste printing temperature of S1302 is 155±5°C.

[0013] Furthermore, the printing temperature of the waterproof glue is 145±5°C.

[0014] The beneficial effects of the invention: through an automated production method, automatic printing of waterproof glue and upper material, waterproof glue and middle material is realized, the upper material printed with waterproof glue is automatically assembled with the middle material, the lower material is automatically printed with conductive glue, and the conductive glue and the waterproof glue printed on the middle material are automatically assembled on the lower semi-finished product and the second semi-finished product in corresponding directions, which can effectively ensure the accuracy of the product, reduce the breakage rate and contamination rate during the product assembly process, and is conducive to saving artificial finished products and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a flowchart of a method for assembling a membrane switch according to an embodiment of the present application.

[0016] Figure 2 A schematic diagram of a membrane switch used in an embodiment of the present application.

[0017] Marked in the figure: 1, upper layer material 1; 2, waterproof glue 2; 3, middle layer material 3; 4, conductive glue 4; 5, lower layer material 5. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1As shown in FIG. 2, the assembling method of the membrane switch provided in the embodiment of the present application comprises the following steps: S1, substrate preparation: preparing an upper material 1, a middle material 3 and a lower material 5; S2, one-time printing of waterproof glue 2: printing a waterproof glue 2 for avoiding the conductive circuit of the upper material 1 on the front of the upper material 1 by a roll-to-roll printing machine to form an upper semi-finished product, and rolling up the upper semi-finished product; printing a conductive glue 4 on a specific conductive circuit on the front of the lower material 5 to form a lower semi-finished product, and rolling up the lower semi-finished product; S3, semi-finished product assembly Assembly: one side of the upper semi-finished product waterproof glue 2 is automatically pressed and assembled with the middle layer material 3 to form a No. 1 semi-finished product, and the No. 1 semi-finished product is rolled up; S4, secondary printing of waterproof glue 2: the waterproof glue 2 is printed on the front of the middle layer material 3 of the No. 1 semi-finished product by a roll printing machine to form a No. 2 semi-finished product, and the No. 2 semi-finished product is rolled up; S5, finished product assembly: the lower semi-finished product and the No. 2 semi-finished product are automatically assembled by an automatic roll laminating machine in a manner that the conductive glue 4 corresponds to the waterproof glue 2 printed on the middle layer material 3 to form a finished product.

[0020] In the above design, the automatic printing of the waterproof glue 2 and the upper material 1, and the waterproof glue 2 and the middle material 3 is realized through an automated production method. The upper material 1 printed with the waterproof glue 2 is automatically assembled with the middle material 3. The conductive glue 4 is automatically printed on the lower material 5. The conductive glue 4 and the waterproof glue 2 printed on the middle material 3 correspond to the lower semi-finished product and the second semi-finished product. This can effectively ensure the accuracy of the product, reduce the breakage rate and contamination rate during the product assembly process, and is conducive to saving artificial finished products and improving production efficiency.

[0021] Specifically: the specific steps of preparing the upper material 1 are: S1101, shrinking: baking the upper PET film coil through a tunnel furnace; S1102, printing silver lines: baking the upper PET film through a snail oven, and printing the silver paste circuit on the front of the upper PET film through a coil printer; S1103, printing carbon oil: printing the carbon oil with only the end of the silver paste circuit exposed through the coil printer, and drying the carbon oil through a snail oven; S1104, printing UV glue: printing UV glue on the silver paste circuit in a specific area through a coil printer, and drying the UV glue through a snail oven; S1105, printing jump silver: printing jump silver on the UV glue through a coil printer, so that the specific area is isolated. The silver paste circuit is turned on, and the silver is dried by a snail oven; S1106, electrical measurement: electrical measurement by a coil function tester; S1107, printing white ink: printing a white ink layer on the reverse side of the upper PET film by a coil printing machine; S1108, printing black ink: printing a black ink layer on the reverse side of the upper PET film that has not been printed with the white ink layer by a coil printing machine, and drying the black ink by a snail oven; S1109, coil coding: coding on the white ink layer by a coil coding machine; S1110, pasting a PIN protection sheet: pasting a PIN protection sheet on the exposed side of the silver paste by a coil laminating machine; S1111, punching: punching the diode mounting hole on the upper PET film by a die-cutting machine.

[0022] It should be noted that the printing environment for silver jumping is: on the upper silver paste circuit, such as positions A and B, there are other silver paste circuits interspersed in the middle, and there is no way to connect them directly. It is necessary to print a layer of insulating UV glue between A and B, and then print another layer of silver paste circuit on the insulating UV to connect A and B, which is called silver jumping.

[0023] In the above design, the upper PET film roll is baked to shrink the upper PET film, and the silver paste circuit is insulated by printing carbon oil and UV glue; the silver paste circuit part corresponding to the keyboard letters is covered with black ink to achieve insulation. The withstand voltage value of the upper PET film and the conductivity of the silver paste circuit can be tested by electrical measurement; the QR code is sprayed by printing a white ink layer to facilitate inventory management; and the oxidation and leakage of the silver paste circuit can be effectively prevented by attaching a PIN protection sheet to the exposed side of the silver paste.

[0024] Specifically: the baking temperature of S1101 is 175±5°C, the silver paste printing temperature of S1102 and the carbon oil printing temperature of S1103 are both 155±5°C, the printing temperature of the white ink layer is 120±5°C, and the printing temperature of the black ink layer is 145±5°C.

[0025] In the above design, the baking temperature of 175±5℃ can remove excess moisture without damaging the upper PET film. The silver paste printing temperature and the carbon oil printing temperature of S203 are both 155±5℃, which can ensure that the silver paste and ink have sufficient fluidity before solidification. The printing temperature of the white ink layer is 120±5℃, and the printing temperature of the black ink layer is 145±5℃, which can effectively ensure that the white ink and black ink have sufficient fluidity before solidification.

[0026] Specifically: the specific steps for preparing the middle layer material 3 are: S1201, shrinkage: baking the middle layer PET film coil through a coil printing machine and a snail oven; S1202, punching: punching the diode mounting holes in the middle layer PET film through a die-cutting machine; S1203, dust removal: dust removal and cleaning of the punched middle layer PET film with a detergent.

[0027] In the above design, the moisture of the middle layer PET film can be effectively removed by rolling and baking the middle layer PET film. The dust removal and cleaning can effectively remove the debris of the middle layer PET film after punching and ensure the cleanliness.

[0028] Specifically: the specific steps for preparing the lower layer material 5 are: S1301, shrinking: baking the lower layer PET film through a snail oven, and rolling the baked lower layer PET film through a roll printing machine; S1302, printing silver wire: printing the silver paste circuit on the lower layer PET film through a roll printing machine, and drying the silver paste circuit through a snail oven; S1303, electrical testing: performing electrical testing on the silver paste circuit through a roll function testing machine; S1304, punching: punching the diode mounting hole on the lower layer PET film.

[0029] In the above design, coil baking can effectively remove moisture from the lower PET film, and the conductivity of the silver paste circuit on the lower PET film can be tested by electrical measurement.

[0030] Specifically: the lower PET film processing steps also include S13021, located between S1302 and S1303, secondary printing of silver dots: secondary printing of silver dots at specific positions of the silver paste circuit by a roll printing machine, and drying the silver dots by a snail oven; S13031, located between S1303 and S1304, baking: secondary baking of the silver dots by a tunnel furnace.

[0031] In the above design, according to the actual application environment, secondary silver dots are selectively printed at special positions of the silver paste circuit on the lower PET film to increase the height of the circuit; and the secondary silver dots can be completely dried by baking.

[0032] Specifically: the baking temperature range of S1301 is 175±5°C, and the silver paste printing temperature of S1302 is 155±5°C.

[0033] In the above design, the baking temperature range is: 175±5℃, which can effectively remove the moisture of the lower PET film. The silver paste printing temperature is 155±5℃, which can effectively ensure that the silver paste flows fully before solidification.

[0034] Specifically: the printing temperature of the waterproof glue 2 is 145±5°C.

[0035] In the above design, the printing temperature of the waterproof glue 2 is 145±5°C, which can meet the requirements of the printing operation.

[0036] To further explain in detail, it should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for assembling a membrane switch, characterized in that: The method comprises the following steps: S1, substrate preparation: preparing an upper layer material (1), a middle layer material (3) and a lower layer material (5); S2, one-time printing of waterproof glue (2): printing a waterproof glue (2) for avoiding the conductive line of the upper layer material (1) on the front side of the upper layer material (1) by a roll-to-roll printing machine to form an upper layer semi-finished product, and rolling up the upper layer semi-finished product; printing a conductive glue (4) on a specific conductive line on the front side of the lower layer material (5) to form a lower layer semi-finished product, and rolling up the lower layer semi-finished product; S3, semi-finished product assembly: assembling the upper layer semi-finished product waterproof glue ( 2) One side is automatically pressed and assembled with the middle layer material (3) to form a No. 1 semi-finished product, and the No. 1 semi-finished product is rolled up; S4, secondary printing of waterproof glue (2): the waterproof glue (2) is printed on the front of the middle layer material (3) of the No. 1 semi-finished product by a roll printing machine to form a No. 2 semi-finished product, and the No. 2 semi-finished product is rolled up; S5, finished product assembly: the lower layer semi-finished product and the No. 2 semi-finished product are automatically assembled by an automatic roll laminating machine in a manner that the conductive glue (4) and the waterproof glue (2) printed on the middle layer material (3) are correspondingly laminated to form a finished product.

2. The method for assembling a membrane switch according to claim 1, wherein: The specific steps of preparing the upper material (1) are as follows: S1101, shrinking: baking the upper PET film coil through a tunnel furnace; S1102, printing silver lines: baking the upper PET film through a snail oven, and printing silver paste lines on the front of the upper PET film through a coil printer; S1103, printing carbon oil: printing carbon oil on the silver paste lines with only the ends of the silver paste lines exposed through a coil printer, and drying the carbon oil through a snail oven; S1104, printing UV glue: printing UV glue on the silver paste lines in a specific area through a coil printer, and drying the UV glue through a snail oven; S1105, printing jump silver: printing jump silver on the UV glue through a coil printer, so that the silver lines isolated in a specific area are The silver paste circuit is conductive, and the silver is dried by a snail oven; S1106, electrical measurement: electrical measurement by a coil function tester; S1107, printing white ink: printing a white ink layer on the reverse side of the upper PET film by a coil printing machine; S1108, printing black ink: printing a black ink layer on the reverse side of the upper PET film that has not been printed with the white ink layer by a coil printing machine, and drying the black ink by a snail oven; S1109, coil coding: coding on the white ink layer by a coil coding machine; S1110, pasting a PIN protection sheet: pasting a PIN protection sheet on the exposed side of the silver paste by a coil laminating machine; S1111, punching: punching out the diode mounting holes on the upper PET film by a die-cutting machine.

3. The method for assembling a membrane switch according to claim 2, wherein: The baking temperature of S1101 is 175±5°C, the silver paste printing temperature of S1102 and the carbon oil printing temperature of S1103 are both 155±5°C, the printing temperature of the white ink layer is 120±5°C, and the printing temperature of the black ink layer is 145±5°C.

4. The method for assembling a membrane switch according to claim 1, characterized in that: The specific steps of preparing the middle layer material (3) are as follows: S1201, shrinking: baking the middle layer PET film coil by a coil printing machine and a snail oven; S1202, punching: punching the diode mounting holes in the middle layer PET film by a die-cutting machine; S1203, dust removal: dust removal and cleaning of the punched middle layer PET film by a cleaning agent.

5. The method for assembling a membrane switch according to claim 1, characterized in that: The specific steps of preparing the lower layer material (5) are as follows: S1301, shrinking: baking the lower layer PET film by a snail oven, and rolling the baked lower layer PET film by a roll printing machine; S1302, printing silver lines: printing silver paste lines on the lower layer PET film by a roll printing machine, and drying the silver paste lines by a snail oven; S1303, electrical testing: performing electrical testing on the silver paste lines by a roll function testing machine; S1304, punching: punching diode mounting holes on the lower layer PET film.

6. The method for assembling a membrane switch according to claim 5, characterized in that: The lower PET film processing steps also include S13021, secondary printing of silver dots, located between S1302 and S1303: secondary printing of silver dots on specific positions of the silver paste circuit by a roll printing machine, and drying the silver dots by a snail oven; and S13031, baking, located between S1303 and S1304: secondary baking of the silver dots by a tunnel furnace.

7. The method for assembling a membrane switch according to claim 5, characterized in that: The baking temperature range of S1301 is 175±5°C, and the silver paste printing temperature of S1302 is 155±5°C.

8. The method for assembling a membrane switch according to claim 1, characterized in that: The printing temperature of the waterproof glue (2) is 145±5°C.

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