A method for manufacturing a light shielding member for a vehicle-mounted liquid crystal screen

Abstract

The application discloses a preparation method of a light-shielding component for a vehicle-mounted liquid crystal screen, and comprises the following steps: sequentially stacking a bottom supporting film, a first auxiliary release film, a raw material belt and a first low-adhesion film; performing a first punching operation to punch a position-avoiding hole in the first low-adhesion film and form a second cutting line for cutting off the first low-adhesion film, the raw material belt and the first auxiliary release film on both sides of the raw material belt; then pasting a second low-adhesion film on the first low-adhesion film; removing the bottom supporting film and the first auxiliary release film in the middle and covering a second auxiliary release film on the same side; performing a second punching operation to punch products in the raw material belt, wherein every two adjacent products are central symmetric to each other, and the products in between fall into the position-avoiding hole; removing the second auxiliary release film and the waste of the raw material belt; separating the first low-adhesion film from the second low-adhesion film, respectively pasting a third auxiliary release film and winding up respectively. Although the preparation method consumes the auxiliary release film with low unit price, the utilization rate of the raw material belt with higher unit price is improved, and the comprehensive cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electronic material forming, in particular to a preparation method of a light shielding component for a vehicle-mounted liquid crystal screen. BACKGROUND

[0002] The light shielding component for the vehicle-mounted liquid crystal screen is composed of several layers of films. The supporting manufacturer needs to adhere a raw material tape with the same material as the light shielding component to a carrier tape, and then punch out the light shielding components from the raw material tape according to the shape and required layout spacing designed by the host manufacturer. After excluding the waste materials other than the light shielding components, the carrier tape is left with a plurality of light shielding components with sufficient spacing between each other. Then the carrier tape is wound and packaged to be provided to the host manufacturer. The light shielding component is rarely regular in shape. For the light shielding component with side wings, the light shielding component cannot be compactly laid out on the raw material tape, resulting in low utilization rate of the raw material tape. For the raw material tape with high unit price, the cost pressure is relatively large. In addition, the host manufacturer also requires that the layout spacing of the light shielding component on the carrier tape cannot be too small. SUMMARY

[0003] To solve at least one problem of the prior art, the present application provides a preparation method of a light shielding component for a vehicle-mounted liquid crystal screen.

[0004] The preparation method of the light shielding component for the vehicle-mounted liquid crystal screen comprises the following steps: sequentially stacking a bottom film, a first auxiliary release film, a raw material tape, and a first low-adhesion film to form a composite tape; performing a first punching operation from the side of the first low-adhesion film, the first punching operation punching out a plurality of closed first cutting lines on the first low-adhesion film, forming second cutting lines extending in the length direction on both sides of the first cutting lines, and punching out positioning holes penetrating through the composite tape on the outer sides of the two second cutting lines, wherein the second cutting lines cut off the first low-adhesion film, the raw material tape, and the first auxiliary release film; excluding the part of the first low-adhesion film surrounded by the first cutting lines to form a clearance hole on the first low-adhesion film, and then adhering a second low-adhesion film on the first low-adhesion film; excluding the part of the first auxiliary release film between the bottom film and the two second cutting lines, and covering the second auxiliary release film at the excluded part of the first auxiliary release film; performing a second punching operation from the side of the second auxiliary release film, the second punching operation cutting off the second auxiliary release film and the raw material tape, wherein the second punching operation punches out a plurality of products on the raw material tape, each adjacent two products are a group, the arrangement of the two products in each group is central symmetric to each other, and one product in each group is adhered to the second low-adhesion film through the clearance hole; excluding the waste materials of the second auxiliary release film and the raw material tape; adhering a third auxiliary release film to the first low-adhesion film carrying the products, and winding the first low-adhesion film, after the first low-adhesion film is separated from the second low-adhesion film, adhering another third auxiliary release film to the second low-adhesion film carrying the products and winding the second low-adhesion film.

[0005] In some embodiments, the raw material tape comprises a first tape and a second tape adhered to both sides of the first tape.

[0006] In some embodiments, the second low-adhesion film, the backing film, the first auxiliary release film, the raw material strip, and the first low-adhesion film are sequentially stacked from bottom to top before the second low-adhesion film is covered.

[0007] In some embodiments, the second low-adhesion film is attached between the two second cutting lines, and the width of the second low-adhesion film is equal to the distance between the two second cutting lines.

[0008] In some embodiments, the second auxiliary release film is attached between the two second cutting lines, and the width of the second auxiliary release film is equal to the distance between the two second cutting lines, and can completely cover the product.

[0009] In some embodiments, the third auxiliary release film is attached between the two second cutting lines, and the width of the third auxiliary release film is equal to the distance between the two second cutting lines, and can completely cover the product.

[0010] In some embodiments, the second auxiliary release film is thinner than the first auxiliary release film.

[0011] In some embodiments, the first auxiliary release film has a thickness of 0.075 mm, and the second auxiliary release film has a thickness of 0.025 mm.

[0012] The present application has the following advantages: the product is arranged in a "twin" and compact manner on the raw material strip, improving the utilization rate of the raw material strip; the products that are spaced apart are attached to the first low-adhesion film through the avoidance holes, and the remaining products that are spaced apart are attached to the second low-adhesion film; when the first low-adhesion film and the second low-adhesion film are separated, the spacing between the products on the two low-adhesion films meets the requirements of the main machine manufacturer; although the present application consumes the auxiliary release film with a low unit price, it improves the utilization rate of the raw material strip with a higher unit price, and reduces the comprehensive cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A schematic diagram of a method for manufacturing a light-shielding member for a vehicle-mounted liquid crystal screen according to an embodiment of the present disclosure.

[0014] Figure 2 A first cutting operation demonstration diagram of a method for manufacturing a light-shielding member for a vehicle-mounted liquid crystal screen according to an embodiment of the present disclosure.

[0015] Figure 3 A schematic diagram of a raw material strip after a first cutting operation of a method for manufacturing a light-shielding member for a vehicle-mounted liquid crystal screen according to an embodiment of the present disclosure.

[0016] Figure 4 A schematic diagram of a first cutting die used in a method for manufacturing a light-shielding member for a vehicle-mounted liquid crystal screen according to an embodiment of the present disclosure.

[0017] Figure 5 This is a second punching operation demonstration diagram of a method for preparing a light-shielding component for an in-vehicle LCD screen according to one embodiment of the present disclosure.

[0018] Figure 6 This is a front view of the strip after the second punching operation in a method for preparing a light-shielding component for an in-vehicle LCD screen according to an embodiment of the present disclosure.

[0019] Figure 7 This is a schematic diagram of the second die used in the second punching operation of a method for preparing a light-shielding component for an in-vehicle LCD screen according to an embodiment of this disclosure. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] In some embodiments, a method for manufacturing a light-shielding component for an in-vehicle LCD screen includes steps S1 to S7.

[0022] Step S1: Please combine Figure 1 and Figure 2 The base film 1, the first auxiliary release film 2, the raw material strip 3, and the first low-tack film 4 are stacked in sequence to form a composite material strip.

[0023] The first auxiliary release film 2 is fed horizontally in a step-by-step manner. A support film 1 is attached to the bottom of the first auxiliary release film 2 using pressure rollers. The raw material strip 3 and the first low-adhesion film 4 are then sequentially attached to the upper surface of the first auxiliary release film 2. It is worth noting that the raw material strip 3 is not limited to a single layer; it can be multi-layered, depending on the product requirements of the OEM. For example, Figure 1 The raw material strip 3 is formed by stacking Tape2, Tape1 and Tape2 as shown.

[0024] Step S2: Please combine Figures 1 to 3 A first punching operation is performed from the side of the first low-viscosity film 4. This first punching operation punches out a plurality of closed first tangent lines 5 on the first low-viscosity film 4, forms second tangent lines 6 extending along the length direction on both sides of the first tangent lines 5, and punches out positioning holes penetrating the composite material strip on the outer sides of the two second tangent lines respectively. The second tangent lines 6 cut through the first low-viscosity film 4, the raw material strip 3, and the first auxiliary release film 2. The positioning holes can be used for positioning punching in the second punching operation.

[0025] The die-cutting machine performs the first die-cutting operation on the composite strip from above. Please refer to [reference needed]. Figure 1 The first punching operation used the first die 7. Figure 4 This shows the strip layer structure and the cutting depth of the blade. Further reference. Figure 4The first knife die 7 has a first blade 8 for punching the first cutting line 5 and a second blade 9 for punching the second cutting line 6. The punching depth of the first blade 8 is equal to the thickness of the first low-adhesion film 4, and the punching depth of the second blade 9 is equal to the sum of the thicknesses of the first low-adhesion film 4, the raw material strip 3 and the first auxiliary release film 2. The first knife die 7 also has a third blade 10 for punching positioning holes through the composite material strip near the two edges of the composite material strip, respectively, and the positioning holes are arranged at equal intervals along the length direction.

[0026] Step S3: Please refer to Figure 1 , Figure 3 and Figure 5 , the part of the first low-adhesion film 4 surrounded by the first cutting line 5 is excluded to form a positioning hole 11 on the first low-adhesion film 4, and then a second low-adhesion film 12 is attached to the first low-adhesion film 4.

[0027] The second low-adhesion film 12 is attached between the two second cutting lines 6, and the width of the second low-adhesion film 12 is equal to the distance between the two second cutting lines 6. The two edges of the second low-adhesion film 12 do not exceed the second cutting lines 6. The part of the first low-adhesion film 4 surrounded by the first cutting line 5 is excluded by the waste rubber belt to form the positioning hole 11 on the first low-adhesion film 4. The first low-adhesion film 4 corresponds to the carrier tape mentioned in the background art, the arrangement interval of the positioning hole 11 on the first low-adhesion film 4 is consistent with the arrangement interval of the light shielding component product on the carrier tape required by the main machine manufacturer, and the size of the positioning hole 11 is larger than that of the light shielding component product. After the waste of the first low-adhesion film 4 in the positioning hole 11 is excluded, the second low-adhesion film 12 is attached to the surface of the first low-adhesion film 4 to completely cover the positioning hole 11, and the second low-adhesion film 12 also corresponds to the carrier tape described in the background art.

[0028] Step S4: Please refer to Figure 1 and Figure 5 , the first auxiliary release film 2 between the bottom film 1 and the two second cutting lines 6 is excluded, and a second auxiliary release film 13 is attached to the excluded first auxiliary release film 2.

[0029] The middle part of the first auxiliary release film 2 is removed, leaving the two edge parts with positioning holes on the material tape. The second auxiliary release film 13 is attached to the position of the middle part of the first auxiliary release film 2 that is removed, i.e. the second auxiliary release film 13 is attached between the two second cutting lines 6, the width of the second auxiliary release film 13 is equal to the distance between the two second cutting lines 6, the two edges of the second auxiliary release film 13 do not exceed the second cutting lines 6, and the second auxiliary release film 13 can completely cover the product 14. The first auxiliary release film 2 is slightly thicker, and the second auxiliary release film 13 is relatively thin, for example, the thickness of the first auxiliary release film 2 is 0.075 mm, and the thickness of the second auxiliary release film 13 is 0.025 mm. The thicker first auxiliary release film 2 facilitates the first cutting operation, and after the middle part of the first auxiliary release film 2 is removed, the remaining part also has sufficient strength. The second auxiliary release film 13 is relatively thin, which avoids taking away the product during subsequent waste removal. Preferably, please refer to Figure 1 , after covering the second low-adhesion film 12, the entire material tape is turned over by 180°, resulting in that the backing film 1 is on the top and the second low-adhesion film 12 is on the bottom. The second cutting line 6 cuts the first auxiliary release film 2 into three parts. After removing the backing film 1, the middle part of the first auxiliary release film 2 is torn off, and then the second auxiliary release film 13 is covered. At this time, the middle part of the material tape from top to bottom is the second auxiliary release film 13, the original material tape 3, the first low-adhesion film 4, and the second low-adhesion film 12, and the edge part of the material tape from top to bottom is the second auxiliary release film 13, the first auxiliary release film 2, the original material tape 3, the first low-adhesion film 4, and the second low-adhesion film 12.

[0030] Step S5: please refer to Figure 1 , Figure 5 and Figure 6 , the second cutting operation is performed from the side of the second auxiliary release film 13, and the second cutting operation cuts the second auxiliary release film 13 and the original material tape 3, wherein the second cutting operation cuts a plurality of products 14 on the original material tape 3, every two adjacent products 14 form a group, the arrangement of the two products 14 in each group is central symmetric to each other, and one product 14 in each group is pasted on the second low-adhesion film 12 through the avoidance hole 11.

[0031] In some embodiments, please refer to Figure 1 , the second auxiliary release film 13 is on the top, and the material tape is punched from top to bottom by using the second die 15. The original material tape 3 has adhesive, and the second auxiliary release film 13 can prevent the original material tape 3 from being bonded with the die. Further refer to Figure 7 , the second die 15 has a plurality of fourth cutting edges 16, and these fourth cutting edges 16 have the shape and size of the light-blocking component product. The fourth cutting edges 16 are arranged compactly, and every two adjacent fourth cutting edges 16 are central symmetric to each other, forming a “duo” arrangement. The fourth cutting edges 16 cut the product 14 in the middle part of the material tape, and the cutting depth is the sum of the thicknesses of the second auxiliary release film 13 and the original material tape 3.

[0032] Step S6: please refer to Figure 1 , excluding the second auxiliary release film 13 and raw material tape 3 waste.

[0033] The second auxiliary release film 13 waste and raw material tape 3 waste outside the product 14 are continuous and can be directly torn off, and the second auxiliary release film 13 part on the product can be excluded by using the waste adhesive tape.

[0034] Step S7: please refer to Figure 1 , the third auxiliary release film 17 is attached to the first low-adhesion film 4 carrying the product, and the first low-adhesion film 4 is rolled up, and after the first low-adhesion film 4 is separated from the second low-adhesion film 12, another third auxiliary release film 17 is attached to the second low-adhesion film 12 and the second low-adhesion film 4 is rolled up.

[0035] The third auxiliary release film 17 is attached between the two second cut lines 6, the width of the third auxiliary release film 17 is equal to the distance between the two second cut lines 6, the two edges of the third auxiliary release film 17 do not exceed the second cut line 6, and the third auxiliary release film 17 can completely cover the product 14. A layer of third auxiliary release film 17 is first covered on the first low-adhesion film 4 and the product surface thereon, and the first low-adhesion film 4 is rolled up, causing the first low-adhesion film 4 to be separated from the second low-adhesion film 12. Then another layer of third auxiliary release film 17 is covered on the second low-adhesion film 12 and the product surface thereon, and is rolled up. The originally compactly arranged product is evenly divided into two low-adhesion films, so that the product spacing on each low-adhesion film meets the design requirements of the main machine manufacturer.

[0036] The product is arranged in a "swan" and compact manner on the raw material tape 3, which improves the utilization rate of the raw material tape 3. The products that are spaced apart are adhered to the first low-adhesion film 4 through the avoidance holes 11, and the remaining products that are spaced apart are adhered to the second low-adhesion film 12. When the first low-adhesion film 4 is separated from the second low-adhesion film 12, the product spacing on the two low-adhesion films meets the requirements of the main machine manufacturer. Although the invention consumes auxiliary release films with low unit price, it improves the utilization rate of raw material tapes with higher unit price and reduces the overall cost.

[0037] The above only describes some embodiments of the present application. Those skilled in the art can make several modifications and improvements without departing from the inventive concept, and these all belong to the protection scope of the present application.

Claims

1. A method for manufacturing a light-shielding component for an automotive LCD screen, characterized in that, The method comprises the following steps: a bottom film, a first auxiliary release film, a raw material tape, and a first low-adhesion film are sequentially stacked to form a composite tape; a first cutting operation is performed from the side of the first low-adhesion film, the first cutting operation cuts a plurality of closed first cutting lines on the first low-adhesion film, forms second cutting lines extending in the length direction on both sides of the first cutting lines, and cuts positioning holes through the composite tape on the outer sides of the two second cutting lines, wherein the second cutting lines cut the first low-adhesion film, the raw material tape, and the first auxiliary release film; a first low-adhesion film part surrounded by the first cutting lines is excluded to form a positioning hole on the first low-adhesion film, and then a second low-adhesion film is attached to the first low-adhesion film; a first auxiliary release film part between the bottom film and the two second cutting lines is excluded, and a second auxiliary release film is attached to the excluded first auxiliary release film; a second cutting operation is performed from the side of the second auxiliary release film, the second cutting operation cuts the second auxiliary release film and the raw material tape, wherein the second cutting operation cuts a plurality of products on the raw material tape, every two adjacent products form a group, the arrangement of the two products in each group is central symmetric to each other, and one product in each group is attached to the second low-adhesion film through the positioning hole; the second auxiliary release film and the raw material tape waste are excluded; a third auxiliary release film is attached to the first low-adhesion film carrying the products, and the first low-adhesion film is rolled up, after the first low-adhesion film is separated from the second low-adhesion film, another third auxiliary release film is attached to the second low-adhesion film and the second low-adhesion film is rolled up.

2. The method for producing a light-shielding member for a liquid crystal screen for a vehicle according to claim 1, characterized by, The raw material tape comprises a first tape and a second tape attached to both sides of the first tape.

3. The method for producing a light-shielding member for a liquid crystal screen for a vehicle according to claim 1, characterized by, Before covering the second low-adhesion film, the bottom film, the first auxiliary release film, the raw material tape, and the first low-adhesion film are sequentially stacked from bottom to top; after covering the second low-adhesion film, the entire tape is turned over by 180°.

4. The method for producing a light-shielding member for a liquid crystal screen for a vehicle according to claim 1, characterized by, The second low-adhesion film is attached between the two second cutting lines, and the width of the second low-adhesion film is equal to the distance between the two second cutting lines.

5. The method for manufacturing a light-shielding member for a liquid crystal panel for a vehicle according to claim 1, wherein The second auxiliary release film is attached between the two second cutting lines, and the width of the second auxiliary release film is equal to the distance between the two second cutting lines, and the second auxiliary release film can completely cover the products.

6. The method for manufacturing a light-shielding member for a liquid crystal panel for a vehicle according to claim 1, wherein The third auxiliary release film is attached between the two second cutting lines, and the width of the third auxiliary release film is equal to the distance between the two second cutting lines, and the third auxiliary release film can completely cover the products.

7. The method for manufacturing a light-shielding member for a liquid crystal panel for a vehicle according to claim 1, wherein The thickness of the first auxiliary release film is 0.075 mm, and the thickness of the second auxiliary release film is 0.025 mm.

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