CN107820458A - The processing method of Wedge shape light conduction board and the pressure roller group of angle adjustable - Google Patents

Abstract

The invention discloses a kind of processing method of Wedge shape light conduction board and the pressure roller group of angle adjustable, wherein processing method to be：Liquid resin first will be melt into for the solid feed for processing light guide plate；The resin of liquid is extruded to pressure roller group using plastic extruder again, every group of pressure roller group all includes the first roller and the second roller being not parallel to each other, there is angle between first roller and the second roller, extruded when liquid resin is through between the first roller and the second roller by the first roller and the second roller, Wedge shape light conduction board is formed after cooling；Wherein being used to produce the pressure roller group of Wedge shape light conduction board includes the first roller and the second roller being not parallel to each other, and has angle between the first roller and the second roller and its size can adjust.As long as adjust the angle and distance between the roller of pressure roller group, you can realize the production of the Wedge shape light conduction board of different bevel angles and different-thickness, it is not necessary to all open up mould for the light guide plate of each specification, reduce production cost, and continuous production can be realized.

Description

Processing method of wedge-shaped light guide plate and pressure roller group with adjustable angle

technical field

The invention relates to the technical field of light guide plate processing, in particular to a processing method for a wedge-shaped light guide plate and a pressure roller set for producing the wedge-shaped light guide plate.

Background technique

The light guide plate is an optical-grade acrylic PMMA (polymethyl methacrylate)/PS (polystyrene)/MS (polyacrylate)/PC (but not limited to the above materials) sheet, which has extremely high reflectivity and does not The characteristics of light absorption are widely used in LCD (liquid crystal display) and LED (light-emitting diode) display screens. It uses optical-grade acrylic sheets to absorb the light emitted from the lamp. When the light hits each light guide point, the reflected light It will diffuse to various angles, and then emit from the front of the light guide plate. Through various light guide points of different densities and sizes, the light guide plate can be made to emit light evenly, and the line light source can be converted into a surface light source.

Most of the existing wedge-shaped light guide plates are manufactured by injection molding. The principle is that the injection molding machine injects optical grade PMMA/PS/MS/PC (but not limited to the above materials) particles into the mold under high temperature and high pressure to cool and form them. Generally speaking, the injection-type wedge-shaped light guide plate is prone to burrs and irregular molding, resulting in uneven stress, poor flexibility, easy to break when bending, low brightness, and low product yield. But the cost of the mold is very expensive. As long as the angle of the slope and the size of the product are changed, a different mold must be re-opened. The cost of the mold is extremely high and it is very troublesome.

Contents of the invention

The invention provides a processing method of a wedge-shaped light guide plate and an angle-adjustable pressure roller group. As long as the angle between the rollers of the pressure roller group and the distance between the rollers are adjusted, the wedge-shaped light guide plate with different slope angles can be realized. The production of light plates and wedge-shaped light guide plates of different thicknesses does not require a mold for each specification of light guide plates, which greatly reduces production costs, and can achieve continuous production with stable production process and high efficiency.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a processing method of a wedge-shaped light guide plate, which is carried out according to the following steps:

Step S1. Melting the solid raw material used for processing the light guide plate into a liquid resin;

Step S2. Using a plastic extruder to extrude the liquid resin to the pressing roller set, the pressing roller set has at least one set, and each set of pressing roller sets includes a first roller and a second roller that are not parallel to each other , there is an angle between the first roller and the second roller, the liquid resin is squeezed by the first roller and the second roller when it passes between the first roller and the second roller, and forms a wedge shape after cooling light guide plate.

Further, the angle between the first roller and the second roller is adjustable.

Furthermore, the light guide plate is a wedge-shaped light guide plate with a right-angled trapezoidal cross section; in step S2, both the first roller and the second roller are cylinders.

Furthermore, the light guide plate includes a wedge-shaped light guide part with a right-angled trapezoidal cross-section and a light-incoming adjustment part located on at least one of the upper and lower sides of the wedge-shaped light-guide part, and the cross-section of the light-incoming adjustment part is rectangular. ;

In step S2, the first roller is a cylinder, the middle of the second roller is a cylinder, and the end of the second roller forms a circular platform matching the light entering adjustment portion of the light guide plate.

Further, in step S2, the pressure roller set includes a first roller, a second roller and a third roller, and the second roller and the third roller are arranged symmetrically; the liquid resin is first After preliminary shaping between the first roller and the second roller, and then further shaping between the first roller and the third roller, the light guide plate is formed.

Further, in step S2, the surface of at least one of the first roller and the second roller is provided with patterns, and the liquid resin passes between the first roller and the second roller The pattern is pressed on the surface of the light guide plate to form a light guide pattern and form a continuous light guide plate, and then cut to form a light guide plate of a required size.

Further, in step S2, the surfaces of the first roller and the second roller are both smooth, and the liquid resin passes between the first roller and the second roller to form a continuous and smooth surface. Light guide plate; then cut to form the light guide plate of required size.

Furthermore, at least one side of the light guide plate on the smooth surface has a light guide pattern, and the light guide pattern is one of the following three structures:

1. The light guide pattern is a pattern formed on the surface of the light guide plate by a laser dotting process;

2. The light guide pattern is a pattern formed on the surface of the light guide layer by an ink printing process;

3. The light guide pattern is a pattern formed on the surface of the light guide plate by hot pressing embossing process.

Furthermore, there are two light entering adjustment parts, which are respectively the first light entering adjustment part located on the low side of the wedge-shaped light guide part and the second light entering adjustment part located on the high side of the wedge-shaped light guide part. department;

In step S2, the first roller is a cylinder, the middle of the second roller is a cylinder, and one end of the second roller is formed to match the first light entering adjustment part of the light guide plate. The other end of the circular platform also forms a circular platform matching the second light-incoming adjustment part.

The present invention also provides an angle-adjustable pressure roller set for producing a wedge-shaped light guide plate. The pressure roller set has at least one set, and each set of pressure roller sets includes a first roller and a second roller that are not parallel to each other. Two rollers, there is an included angle between the first roller and the second roller, and the size of the included angle can be adjusted, so that the included angle between the first roller and the second roller can be adjusted in one of the following two ways:

1. The end of the second roller close to the first roller can rotate in the plane where the second roller and the first roller are located;

2. The end of the second roller away from the first roller can be raised or lowered in the plane where the second roller and the first roller are located.

The beneficial effects of the present invention are:

The processing method of the present invention is to melt the solid raw material used for processing the light guide plate into a liquid resin; use a plastic extruder to extrude the liquid resin to the pressure roller set, the pressure roller set includes a first roller and a second roller, The liquid resin is squeezed between the first roller and the second roller and cooled to form a light guide plate; compared with the light guide plate processed by traditional injection molding method, it has the following advantages:

1. As long as the angle and the distance between the rollers of the pressure roller group are adjusted, the production of wedge-shaped light guide plates with different slope angles and wedge-shaped light guide plates with different thicknesses can be realized, and there is no need for each specification. All the bare boards are equipped with molds, which greatly reduces the production cost, and can realize continuous production, stable production process and high efficiency;

2. It can be cut at will according to the specifications of the required light guide plate. The size of the light guide plate is flexible and the applicability is strong;

3. Compared with the traditional flat light guide plate, the wedge-shaped light guide plate produced can save about 40% of the material without affecting the light guide effect, thereby greatly saving the material cost and improving the price competitiveness of the product;

4. During the processing of the light guide plate, the surface of at least one of the first roller and the second roller can be provided with a pattern, and when the liquid resin passes between the first roller and the second roller, the pattern is pressed Form the light guide pattern on the surface of the light guide plate, form the light guide point on the surface of the light guide plate at the same time of extrusion molding, no need to process the light guide point by printing, hot pressing or laser dotting, etc., reduce the process, improve efficiency, and further reduce manufacturing cost;

5. By setting the end of the second roller as a round platform, in the extrusion molding process, the light-incoming adjustment parts can be formed on both sides of the wedge-shaped light guide part of the light guide plate, which not only reduces the process and saves costs, but also The light entering adjustment part can adjust the light entering uniformity of the light.

The above description of the present invention is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the contents of the description, the following is a detailed description of the preferred embodiments of the present invention as follows.

Description of drawings

Fig. 1 is a schematic structural view of a light guide plate of the present invention (the light guide plate is a wedge-shaped light guide plate);

Fig. 2-1 is the front view (first kind of specific embodiment) of pressing roller group of the present invention;

Fig. 2-2 is the plan view (first kind of specific embodiment) of pressing roller group of the present invention;

Fig. 2-3 is the left side schematic diagram (first kind of specific embodiment) of pressing roller group of the present invention;

Fig. 3-1 is the front view (second kind of specific embodiment) of pressing roller group of the present invention;

Fig. 3-2 is the plan view schematic diagram (the second kind of specific embodiment) of the pressure roller group of the present invention;

Fig. 3-3 is the left side view (second kind of specific embodiment) of pressing roller group of the present invention;

Fig. 4-1 is the front view (third kind of specific embodiment) of pressing roller group of the present invention;

Fig. 4-2 is the plan view (the 3rd kind of specific embodiment) of pressing roller group of the present invention;

Fig. 4-3 is the left side schematic diagram (the third kind of specific embodiment) of pressing roller group of the present invention;

Fig. 5-1 is the front view of the pressure roller group of the present invention (the fourth specific embodiment);

Fig. 5-2 is the top view of the pressure roller group of the present invention (the fourth specific embodiment);

Fig. 5-3 is the left side schematic diagram (the fourth specific embodiment) of the pressure roller group of the present invention;

Fig. 6 is a schematic structural view of the light guide plate of the present invention (the two sides of the light guide plate are provided with light-incoming adjustment parts);

Fig. 7 is a front view of the pressure roller set of the present invention (when light-incoming adjustment parts are provided on both sides of the light guide plate);

The parts are marked as follows in the accompanying drawings:

Light guide plate 100, wedge-shaped light guide part 101, first light entering adjustment part 102, second light entering adjusting part 103; pressure roller set 10, first roller 11, second roller 12, round table 121 and third roller 13.

Detailed ways

Specific embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented in other different ways, that is, various modifications and changes can be made without departing from the disclosed scope of the present invention.

Embodiment 1: A kind of processing method of wedge-shaped light guide plate is carried out according to the following steps:

Step S1. Melting the solid raw material used for processing the light guide plate into a liquid resin;

Step S2. Using a plastic extruder to extrude the liquid resin to the pressing roller set 10, the pressing roller set is provided with at least one set, and each set of pressing roller sets includes a first roller 11 and a second roller that are not parallel to each other. Roller 12, there is an angle between the first roller and the second roller, the liquid resin is squeezed by the first roller and the second roller when passing between the first roller and the second roller, and cooled Finally, a wedge-shaped light guide plate is formed.

In a specific implementation, the first roller is arranged horizontally, and the second roller is arranged obliquely.

Or the first roller is arranged vertically, and the second roller is arranged obliquely.

A specific implementation in this embodiment is: the light guide plate 100 is a wedge-shaped light guide plate with a right-angled trapezoidal cross-section; in step S2, both the first roller and the second roller are cylinders, as shown in Figure 1 shown. And in this embodiment, the angle between the first roller 11 and the second roller 12 can be adjusted.

Another specific implementation manner in this embodiment is: the light guide plate 100 includes a wedge-shaped light guide part 101 with a right-angled trapezoidal cross section and a light entering adjustment part located on at least one of the upper and lower sides of the wedge-shaped light guide part, The cross-section of the light entering adjustment part is rectangular;

In step S2, the first roller is a cylinder, the middle of the second roller is a cylinder, and the end of the second roller forms a circular platform matching the light entering adjustment portion of the light guide plate.

In this embodiment, the included angle between the first roller and the second roller is preset during production of the pressure roller set.

In this embodiment, preferably, there are two light entrance adjustment parts, and they are respectively the first light entrance adjustment part 102 located on the low side of the wedge-shaped light guide part and the first light entrance adjustment part 102 located on the high side of the wedge-shaped light guide part. The second light entering adjustment part 103, as shown in FIG. 6;

In step S2, the first roller 11 is a cylinder, the middle of the second roller 12 is a cylinder, and one end of the second roller 12 forms a first light-incoming adjustment with the light guide plate 100 . part, and the other end part also forms a circular platform 121 matching the second light entering adjustment part, as shown in FIG. 7 .

In step S2, the pressure roller set 10 includes a first roller 11, a second roller 12 and a third roller 13, and the second roller and the third roller are arranged symmetrically; the liquid resin is first After preliminary shaping between the first roller and the second roller, and then further shaping between the first roller and the third roller, the light guide plate is formed. And the included angle between the first roller and the second roller is preset during production of the pressure roller set.

The first specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are located in the same vertical plane, and the first roller is in the same vertical plane as the first roller in the length direction. The horizontal planes are parallel (that is, the second roller and the third roller are respectively located above and below the first roller), and the second roller and the third roller are arranged symmetrically with the axis of the first roller as the center line, such as Figure 2-1 to Figure 2-3.

The second specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are located in the same vertical plane, and the first roller is in the same vertical plane as the first roller in the length direction. The vertical planes are parallel (for example, the second roller and the third roller are located at the front, rear or left and right of the first roller, but not limited thereto), and the second roller and the third roller are arranged in the same way as the first roller The axis is set symmetrically to the center line, as shown in Figure 3-1 to Figure 3-3.

The third specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are located in the same horizontal plane, and the first roller is parallel to the horizontal plane in the length direction (For example, the second roller and the third roller are positioned at the front, rear or left and right of the first roller, but not limited thereto), the second roller and the third roller take the axis of the first roller as the center line Symmetrical settings, as shown in Figure 4-1 to Figure 4-3.

The fourth specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are not located in the same plane, and the second roller and the third roller It is mirror symmetrical with any plane where the axis of the first roller is located (for example, the first roller is parallel to the horizontal plane in the length direction, and the second roller and the third roller are mirror symmetrical with the horizontal plane), such as Figure 5-1 to Figure 5-3.

In step S2, the surface of at least one of the first roller 11 and the second roller 12 is provided with patterns, and the liquid resin passes between the first roller and the second roller, so The pattern is pressed on the surface of the light guide plate to form a light guide pattern and form a continuous light guide plate, and then cut to form a light guide plate of required size.

The pattern provided on the surface of at least one of the first roller and the second roller is dot-shaped, linear-shaped, prism-shaped or mesh-shaped, but not limited thereto.

Alternatively, in step S2, the surfaces of the first roller and the second roller are both smooth, and the liquid resin passes between the first roller and the second roller to form a continuous and smooth light guide plate ; Afterwards, the light guide plate of the required size is formed by cutting.

At least one side of the light guide plate on the smooth surface has a light guide pattern, and the light guide pattern is one of the following three structures:

1. The light guide pattern is a pattern formed on the surface of the light guide plate by a laser dotting process;

2. The light guide pattern is a pattern formed on the surface of the light guide plate through an ink printing process;

3. The light guide pattern is a pattern formed on the surface of the light guide plate by hot pressing embossing process.

The shape of the light guide pattern on the light guide plate of the light surface is dot shape, line shape, prism shape or mesh shape, but is not limited thereto.

Embodiment 2: An angle-adjustable pressure roller set for producing a wedge-shaped light guide plate: the pressure roller set is provided with at least one set, and each set of pressure roller sets includes a first roller 11 and a second roller that are not parallel to each other. Two rollers 12, there is an included angle between the first roller and the second roller, and the size of the included angle can be adjusted, so that the included angle between the first roller and the second roller can be adjusted. The mode of tuning is one of the following two ways:

1. The end of the second roller close to the first roller can rotate in the plane where the second roller and the first roller are located;

2. The end of the second roller away from the first roller can be raised or lowered in the plane where the second roller and the first roller are located.

The mechanism that realizes that the end of the second roller close to the first roller can rotate in the plane where the second roller and the first roller are located is: a rotating cylinder is provided, and the rotating cylinder is connected to the second roller. The rotating shaft of the roller is connected, and the rotating cylinder can drive the rotating shaft of the second roller to rotate to realize the adjustment of the included angle between the second roller and the first roller.

But not limited thereto, for example, manual adjustment is also possible.

The mechanism to realize that the end of the second roller away from the first roller can be raised or lowered in the plane where the second roller and the first roller are located is as follows: a cylinder and a push rod are provided, and the cylinder and the first roller are connected to each other. One end of the push rod is connected, the other end of the push rod is connected with the shaft of the second roller away from the first roller, and the air cylinder can drive the second roller away from the first roller Lifting or falling back to realize the adjustment of the included angle between the second roller and the first roller.

But not limited thereto, for example, manual adjustment is also possible.

The light guide plate 100 is a wedge-shaped light guide plate with a right-angled trapezoidal cross section; the first roller and the second roller are cylinders.

Patterns are provided on the surface of at least one of the first roller and the second roller, and the liquid resin passes between the first roller and the second roller.

The pattern provided on the surface of at least one of the first roller and the second roller is dot-shaped, linear-shaped, prism-shaped or mesh-shaped, but not limited thereto.

Or both the surfaces of the first roller and the second roller are smooth, and the liquid resin passes between the first roller and the second roller to form a smooth and continuous light guide plate.

In this embodiment, preferably, the pressure roller set 10 includes a first roller 11 , a second roller 12 and a third roller 13 , and the second roller and the third roller are arranged symmetrically.

The first specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are located in the same vertical plane, and the first roller is in the same vertical plane as the first roller in the length direction. The horizontal planes are parallel (that is, the second roller and the third roller are respectively located above and below the first roller), and the second roller and the third roller are arranged symmetrically with the axis of the first roller as the center line, such as Figure 2-1 to Figure 2-3.

The second specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are located in the same vertical plane, and the first roller is in the same vertical plane as the first roller in the length direction. The vertical planes are parallel (for example, the second roller and the third roller are located at the front, rear or left and right of the first roller, but not limited thereto), and the second roller and the third roller are arranged in the same way as the first roller The axis is set symmetrically to the center line, as shown in Figure 3-1 to Figure 3-3.

The third specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are located in the same horizontal plane, and the first roller is parallel to the horizontal plane in the length direction (For example, the second roller and the third roller are positioned at the front, rear or left and right of the first roller, but not limited thereto), the second roller and the third roller take the axis of the first roller as the center line Symmetrical settings, as shown in Figure 4-1 to Figure 4-3.

The fourth specific embodiment is: the first roller 11, the second roller 12 and the third roller 13 are not located in the same plane, and the second roller and the third roller It is mirror symmetrical with any plane where the axis of the first roller is located (for example, the first roller is parallel to the horizontal plane in the length direction, and the second roller and the third roller are mirror symmetrical with the horizontal plane), such as Figure 5-1 to Figure 5-3.

The above descriptions are only examples of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structures made using the content of the description of the present invention, or directly or indirectly used in other related technical fields, are equally included in this patent. inventions within the scope of patent protection.

Claims (10)

1. a processing method of wedge-shaped light guide plate, is characterized in that: carry out according to the following steps: Step S1. Melting the solid raw material used for processing the light guide plate into a liquid resin; Step S2. Using a plastic extruder to extrude the liquid resin to the pressing roller set (10), the pressing roller set is provided with at least one set, and each set of pressing roller sets includes first rollers (11) that are not parallel to each other. ) and the second roller (12), there is an included angle between the first roller and the second roller, and the liquid resin is absorbed by the first roller and the second roller when passing between the first roller and the second roller Extruded by rollers and cooled to form a wedge-shaped light guide plate. 2 . The method for processing a wedge-shaped light guide plate according to claim 1 , wherein the angle between the first roller and the second roller is adjustable. 3 . 3. The processing method of a wedge-shaped light guide plate according to claim 1, characterized in that: the light guide plate (100) is a wedge-shaped light guide plate with a right-angled trapezoidal section; in step S2, the first roller and the The second rollers are all cylinders. 4. The processing method of the wedge-shaped light guide plate according to claim 1, characterized in that: the light guide plate (100) includes a wedge-shaped light guide part (101) with a right-angled trapezoidal cross-section and a height of the wedge-shaped light guide part. The light entering adjustment part on at least one of the two sides, the cross section of the light entering adjusting part is rectangular; In step S2, the first roller is a cylinder, the middle of the second roller is a cylinder, and the end of the second roller forms a circular platform matching the light entering adjustment portion of the light guide plate. 5. The processing method of wedge-shaped light guide plate according to claim 1, characterized in that: in step S2, the pressure roller set (10) includes a first roller (11), a second roller (12) and a second roller (12) Three rollers (13), the second roller and the third roller are symmetrically arranged; the liquid resin first passes through the first roller and the second roller for preliminary shaping and then passes through the first roller and the second roller It is shaped again between the three rollers to form a light guide plate. 6. The method for processing a wedge-shaped light guide plate according to claim 1, characterized in that: in step S2, at least one of the first roller and the second roller is provided with a pattern on the surface, The liquid resin passes between the first roller and the second roller, and the pattern is pressed on the surface of the light guide plate to form a light guide pattern and a continuous light guide plate, which is then cut to form a light guide plate of a required size. 7. The processing method of wedge-shaped light guide plate according to claim 1, characterized in that: in step S2, the surfaces of the first roller and the second roller are both smooth surfaces, and the liquid resin passes through the second A continuous and smooth light guide plate is formed between the first roller and the second roller; and then cut to form the light guide plate of the required size. 8. The processing method of the wedge-shaped light guide plate according to claim 7, characterized in that: at least one side of the light guide plate on the smooth surface has a light guide pattern, and the light guide pattern is one of the following three structures : 1. The light guide pattern is a pattern formed on the surface of the light guide plate by a laser dotting process; 2. The light guide pattern is a pattern formed on the surface of the light guide plate through an ink printing process; 3. The light guide pattern is a pattern formed on the surface of the light guide plate by hot pressing embossing process. 9. The processing method of the wedge-shaped light guide plate according to claim 4, characterized in that: there are two light entrance adjustment parts, and they are respectively the first light entrance adjustment part located on the lower side of the wedge-shaped light guide part (102) and the second light entering adjustment part (103) located on the high side of the wedge-shaped light guide part; In step S2, the first roller is a cylinder, the middle of the second roller is a cylinder, and one end of the second roller is formed to match the first light entering adjustment part of the light guide plate. The other end of the circular platform also forms a circular platform matching the second light-incoming adjustment part. 10. An angle-adjustable pressure roller group for producing a wedge-shaped light guide plate, characterized in that: the pressure roller group (10) is provided with at least one group, and each group of pressure roller groups includes first non-parallel to each other. The roller (11) and the second roller (12), there is an angle between the first roller and the second roller, and the size of the angle can be adjusted to realize the first roller and the second roller The angle between the two rollers can be adjusted in one of the following two ways: 1. The end of the second roller close to the first roller can rotate in the plane where the second roller and the first roller are located; 2. The end of the second roller away from the first roller can be raised or lowered in the plane where the second roller and the first roller are located.