阅读说明：本技术 一种光学扩散板的自动化生产工艺 (Automatic production process of optical diffusion plate ) 是由 廖志强 许云刚 吴宏飞 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种光学扩散板的自动化生产工艺,上述扩散板生产工艺中,从配料至叠放将扩散板的整个生产工艺有序联系起来,多个工序在生产线上的共同作用下将自动化程度度提升至90％以上,取代了传统生产工艺中依靠人工操作的局面,大大提升了生产效率,节约成本,同时生产的光扩散板厚度均匀,质量稳定,生产周期缩短40％,相对于现有的整条扩散板生产的产线,本发明中在压花和牵引工艺之间增加了退火工艺,退火的工艺可以减少扩散板在加工过程中会产生内应力,使扩散板的表面更平整,并且可以避免扩散板内部会形成裂纹的情况,更有效的保护了在从挤出机中挤出来的扩散板原料,进一步提升了扩散板被加工出来的质量。(The invention discloses an automatic production process of an optical diffusion plate, in the production process of the diffusion plate, the whole production process of the diffusion plate is orderly linked from material preparation to stacking, the automation degree of a plurality of working procedures is improved to more than 90 percent under the combined action of a production line, the situation of depending on manual operation in the traditional production process is replaced, the production efficiency is greatly improved, the cost is saved, simultaneously, the thickness of the produced optical diffusion plate is uniform, the quality is stable, the production period is shortened by 40 percent, compared with the existing production line for producing the whole diffusion plate, an annealing process is added between the embossing process and the traction process, the annealing process can reduce the internal stress generated in the processing process of the diffusion plate, the surface of the diffusion plate is smoother, the condition that cracks are formed in the diffusion plate can be avoided, the raw material of the diffusion plate extruded from an extruder is more effectively protected, the quality of the processed diffusion plate is further improved.)

1. An automatic production process of an optical diffusion plate is characterized by comprising the following specific steps:

s1, batching: proportioning the PS raw material and the dispersing agent according to a diffusion plate proportioning table in a metering mode, and mixing and stirring the proportioned PS raw material and the dispersing agent uniformly;

s2, feeding: conveying the mixed raw materials into a hopper through a screw feeder;

s3, heating: putting the raw materials in the hopper into a charging barrel of an extruder, wherein the raw materials sequentially pass through a charging barrel first area, a charging barrel second area, a charging barrel third area, a charging barrel fourth area, a charging barrel fifth area, a charging barrel sixth area, a charging barrel seventh area and a charging barrel eighth area, and then pass through a vacuum tube, a connecting sleeve and a die head;

s4, extrusion: before extrusion, the cleanliness of the surfaces of the three rollers needs to be checked, the standard of the check is that stains, scratches and concave-convex points with the diameter of 0.1mm or more are not allowed, and raw materials in a molten state are injected into gaps of the three rollers from a die head of an extruder by using the extruder;

s5, cooling: the temperature of the raw materials is slowly reduced by controlling the temperature of the raw materials through the environment temperature;

s6, embossing: embossing the cooled and molded diffusion plate by using an embossing roller with patterns on the surface;

s7, annealing: placing the embossed diffusion plate in a drying oven with hot air circulation at a certain temperature, wherein the heating temperature is lower than the thermal deformation temperature by 60 ℃;

s8, traction: the diffusion plate after annealing enters a conveying line, and a roller shaft on the conveying line rotates by itself to drive the diffusion plate to be conveyed forwards continuously;

s9, cutting: after the cooling and conveying temperature of the annealed diffusion plate is reduced to below 40 ℃ through a plurality of cooling rollers on a conveying workbench, the smooth diffusion plate is sawed into a semi-finished product with a certain length and size by a length cutting machine, wherein the length cutting machine is used for cutting in a shearing mode;

s10, measurement: clamping the cut diffusion plate, gathering a beam of light source to vertically strike the diffusion plate, and observing the haze of the diffusion plate;

s11, stacking: the diffusion plates are sucked up by the suction cups on the carrying device and are stacked, and the surface is not allowed to be visually observed in ripples, transverse swage marks, cracks, contact seams, strip lines and scratches in the stacking process.

2. The automated manufacturing process of an optical diffuser plate as claimed in claim 1, wherein the mixing and stirring time of the PS raw material and the diffuser in S1 is 15-20 min.

3. The automated manufacturing process for optical diffusion plate as claimed in claim 1, wherein the temperature of the first section of the barrel in S3 is set at 230 ℃ below 170-.

4. The process of claim 1, wherein the cycle of temperature checking of the first, second, third, fourth, fifth, sixth, seventh, eighth, vacuum tube, socket and crosshead in S3 is 4 hours/time.

5. The automated manufacturing process of an optical diffuser plate as claimed in claim 1, wherein the cleaning of the three-roll surface in S4 is performed by lightly rubbing the three-roll surface with a detergent and a dust-free cloth, wherein the three-roll temperature is set at 80-120 ℃.

6. The automated manufacturing process for an optical diffuser plate as claimed in claim 1, wherein the length of the extrusion zone line in S4 is 14 m.

7. The automated manufacturing process of an optical diffuser plate as claimed in claim 1, wherein the temperature of the environment in S5 is set at 25-50 ℃ and the detection period of the environment temperature is 8 hours/time.

8. The automated manufacturing process for an optical diffuser plate as claimed in claim 1, wherein the size of the cut in S9 is set according to the specification/dimension chart of each diffuser plate.

9. The automated manufacturing process for an optical diffuser plate as claimed in claim 1, wherein the thickness of the raw diffuser plate material cut in S9 is 50 mm.

10. The automated manufacturing process for an optical diffuser plate as claimed in claim 1, wherein the cutting speed in S9 is 8 m/min.

Technical Field

The invention relates to the field of diffuser plate production, in particular to an automatic production process of an optical diffuser plate.

Background

In the light diffusion plate, by means of chemical or physical means, when light encounters two media with different refractive indexes in the traveling path, the physical imagination that refraction, reflection and scattering occur is utilized, inorganic or organic light diffusion agents are added into base materials such as PMMA, PC, PS, PP and the like, or the light is artificially adjusted through array arrangement of micro-feature structures on the surface of the base materials to cause the light to be refracted, reflected and scattered in different directions, so that the traveling path of the light is changed, and the effect of optical diffusion is realized by filling and dispersing color of incident light. The light diffusion plate is widely applied to liquid crystal display, LED illumination and imaging display systems, and has the main function of fully scattering incident light to realize softer and more uniform illumination effect.

The light diffuser plate is mainly extrusion, utilizes cutting device with light diffuser plate longitudinal cutting limit portion, crosscut length back, need with the neat stack of board of same size shift to the CNC lathe and polish the flange limit back processing draw-in groove together, follow-up need with the light diffuser plate of neat stack together one by one after the burst dust removal, detect, pack. The traditional light diffusion plate production process is low in automation degree and mainly depends on manual operation, wherein the procedures of weighing, carrying, slicing, stacking and the like of the light diffusion plate are all finished manually, so that the production and processing efficiency is low, the professional quality level of an operator is excessively depended on, and the quality of the light diffusion plate is difficult to ensure; because the room temperature difference that adjacent process needs of light diffuser plate is great, so the process is far apart can satisfy operating temperature's demand, aggravates the degree of difficulty that light diffuser plate realized automated production again.

Disclosure of Invention

The invention aims to solve the problems and designs an automatic production process of an optical diffusion plate.

The technical scheme of the invention is that an automatic production process of an optical diffusion plate comprises the following specific steps:

s1, batching: proportioning the PS raw material and the dispersing agent according to a diffusion plate proportioning table in a metering mode, and mixing and stirring the proportioned PS raw material and the dispersing agent uniformly;

s2, feeding: conveying the mixed raw materials into a hopper through a screw feeder;

s3, heating: putting the raw materials in the hopper into a charging barrel of an extruder, wherein the raw materials sequentially pass through a charging barrel first area, a charging barrel second area, a charging barrel third area, a charging barrel fourth area, a charging barrel fifth area, a charging barrel sixth area, a charging barrel seventh area and a charging barrel eighth area, and then pass through a vacuum tube, a connecting sleeve and a die head;

s4, extrusion: before extrusion, the cleanliness of the surfaces of the three rollers needs to be checked, the standard of the check is that stains, scratches and concave-convex points with the diameter of 0.1mm or more are not allowed, and raw materials in a molten state are injected into gaps of the three rollers from a die head of an extruder by using the extruder;

s5, cooling: the temperature of the raw materials is slowly reduced by controlling the temperature of the raw materials through the environment temperature;

s6, embossing: embossing the cooled and molded diffusion plate by using an embossing roller with patterns on the surface;

s7, annealing: placing the embossed diffusion plate in a drying oven with hot air circulation at a certain temperature, wherein the heating temperature is lower than the thermal deformation temperature by 60 ℃;

s8, traction: the diffusion plate after annealing enters a conveying line, and a roller shaft on the conveying line rotates by itself to drive the diffusion plate to be conveyed forwards continuously;

s9, cutting: after the cooling and conveying temperature of the annealed diffusion plate is reduced to below 40 ℃ through a plurality of cooling rollers on a conveying workbench, the smooth diffusion plate is sawed into a semi-finished product with a certain length and size by a length cutting machine, wherein the length cutting machine is used for cutting in a shearing mode;

s10, measurement: clamping the cut diffusion plate, gathering a beam of light source to vertically strike the diffusion plate, and observing the haze of the diffusion plate;

s11, stacking: the diffusion plates are sucked up by the suction cups on the carrying device and are stacked, and the surface is not allowed to be visually observed in ripples, transverse swage marks, cracks, contact seams, strip lines and scratches in the stacking process.

As a further explanation of the invention, the PS raw material and the dispersing agent in the S1 are mixed and stirred for 15-20 min.

As a further explanation of the invention, the temperature of the first section of the material cylinder in S3 is set at 230 ℃ below 170-.

As a further explanation of the present invention, the cycle of temperature inspection of the cartridge first zone, the cartridge second zone, the cartridge third zone, the cartridge fourth zone, the cartridge fifth zone, the cartridge sixth zone, the cartridge seventh zone, the cartridge eighth zone, the vacuum tube, the socket and the crosshead in S3 was 4 hours/time.

As a further description of the present invention, the cleaning manner of the three-roller surface in S4 is to lightly wipe the three-roller surface with a cleaning agent and a dust-free cloth, wherein the temperature of the three-roller is set to 80-120 ℃.

As a further illustration of the present invention, the S4 extrusion zone line was 14m in length.

As a further explanation of the present invention, the temperature of the environment in S5 was set at 25-50 ℃, and the detection period of the environment temperature was 8 hours/time.

As a further explanation of the present invention, the size of the cut in S9 is set according to the specification and size chart of each diffuser plate.

As a further description of the present invention, the thickness of the raw material of the cut diffuser plate in S9 is 50 mm.

As a further explanation of the present invention, the cutting speed in S9 is 8 m/min.

The production process of the diffusion plate has the beneficial effects that in the production process of the diffusion plate, the whole production process of the diffusion plate is orderly linked from material preparation to stacking, the automation degree of a plurality of working procedures is improved to over 90 percent under the combined action of the conveying workbench, the related auxiliary equipment and the sliding track on the production line, the situation of depending on manual operation in the traditional production process is replaced, the production efficiency is greatly improved, the cost is saved, meanwhile, the produced light diffusion plate is uniform in thickness and stable in quality, and the production period is shortened by 40 percent.

Compared with the existing production line for producing the whole diffusion plate, the annealing process is added between the embossing process and the drawing process, the annealing process can reduce the internal stress generated in the processing process of the diffusion plate, so that the surface of the diffusion plate is smoother, the condition that cracks are formed in the diffusion plate can be avoided, the raw material of the diffusion plate extruded from an extruder is more effectively protected, and the quality of the processed diffusion plate is further improved.

Drawings

FIG. 1 is a schematic flow diagram of the present invention;

Detailed Description

Referring to fig. 1, the present invention will be described in detail with reference to the accompanying drawings, in which an automated manufacturing process of an optical diffuser plate includes the following steps:

s1, batching: proportioning the PS raw material and the dispersing agent according to a diffusion plate proportioning table in a metering mode, and then uniformly mixing and stirring the proportioned PS raw material and the dispersing agent for 15-20 min;

s2, feeding: conveying the mixed raw materials into a hopper through a screw feeder;

s3, heating: putting the raw materials in a hopper into a material barrel of an extruder, wherein the raw materials sequentially pass through a first material barrel area, a second material barrel area, a third material barrel area, a fourth material barrel area, a fifth material barrel area, a sixth material barrel area, a seventh material barrel area and an eighth material barrel area, and then pass through a vacuum tube, a connecting sleeve and a transverse head, wherein the temperature of the first material barrel area is set at 230 ℃ for 170-;

s4, extrusion: before extrusion, the cleanliness of the surfaces of the three rollers needs to be checked, the standard of the check is that stains, scratches and concave-convex points with the diameter of 0.1mm or more are not allowed to exist, and a raw material in a molten state is injected into the gaps of the three rollers from a die head of the extruder by using the extruder, wherein the temperature of the three rollers is set to be 80-120 ℃, and the length of an extrusion area production line is 14 m;

s5, cooling: setting the ambient temperature at 25-50 ℃, controlling the temperature of the raw materials by the ambient temperature, and slowly cooling the raw materials, wherein the detection period of the ambient temperature is 8 hours/time;

s6, embossing: embossing the cooled and molded diffusion plate by using an embossing roller with patterns on the surface;

s7, annealing: placing the embossed diffusion plate in a drying oven with hot air circulation at a certain temperature, wherein the heating temperature is lower than the thermal deformation temperature by 60 ℃; the annealing process can reduce the internal stress generated by the diffusion plate in the processing process, so that the surface of the diffusion plate is smoother, the condition that cracks are formed in the diffusion plate can be avoided, the raw material of the diffusion plate extruded from an extruder is more effectively protected, and the quality of the processed diffusion plate is further improved;

s8, traction: the diffusion plate after annealing enters a conveying line, and a roller shaft on the conveying line rotates by itself to drive the diffusion plate to be conveyed forwards continuously;

s9, cutting: after the cooling and conveying temperature of the annealed diffusion plate is reduced to be below 40 ℃ through a plurality of cooling rollers on a conveying workbench, the smooth diffusion plate is sawed into a semi-finished product with a certain length and size by using a length cutting machine, wherein the length cutting machine is used for cutting in a shearing mode, the cutting size is set according to a specification and size chart of each diffusion plate, the thickness of the raw material of the cut diffusion plate is 50mm, and the cutting speed is 8 m/min;

s10, measurement: clamping the cut diffusion plate, gathering a beam of light source to vertically strike the diffusion plate, and observing the haze of the diffusion plate;

s11, stacking: the diffusion plates are sucked up by the suction cups on the carrying device and are stacked, and the surface is not allowed to be visually observed in ripples, transverse swage marks, cracks, contact seams, strip lines and scratches in the stacking process.

Example one

S1, batching: proportioning the PS raw material and the dispersing agent according to a diffusion plate proportioning table in a metering mode, and then uniformly mixing and stirring the proportioned PS raw material and the dispersing agent for 15 min;

s2, feeding: conveying the mixed raw materials into a hopper through a screw feeder;

s3, heating: putting raw materials in a hopper into a charging barrel of an extruder, wherein the raw materials sequentially pass through a first charging barrel area, a second charging barrel area, a third charging barrel area, a fourth charging barrel area, a fifth charging barrel area, a sixth charging barrel area, a seventh charging barrel area and an eighth charging barrel area, and then pass through a vacuum tube, a connecting sleeve and a transverse head, wherein the temperature of the first charging barrel area is set at 170 ℃, the temperature of the second charging barrel area is set at 180 ℃, the temperatures of the third charging barrel area, the fourth charging barrel area, the fifth charging barrel area, the sixth charging barrel area, the seventh charging barrel area and the eighth charging barrel area are set at 190 ℃, the temperatures of the vacuum tube, the connecting sleeve and the transverse head are set at 190 ℃, and the three-roller surface cleaning mode is to lightly wipe the surfaces of the three rollers by using;

s4, extrusion: before extrusion, the cleanliness of the surfaces of the three rollers needs to be checked, the standard of the check is that stains, scratches and concave-convex points with the diameter of 0.1mm or more are not allowed to exist, raw materials in a molten state are injected into gaps of the three rollers from a die head of the extruder by using the extruder, wherein the temperature of the three rollers is set at 80 ℃, and the length of an extrusion area production line is 14 m;

s5, cooling: setting the ambient temperature at 25 ℃, controlling the temperature of the raw materials by the ambient temperature, and slowly cooling the raw materials, wherein the detection period of the ambient temperature is 8 hours/time;

s6, embossing: embossing the cooled and molded diffusion plate by using an embossing roller with patterns on the surface;

s7, annealing: placing the embossed diffusion plate in a drying oven with hot air circulation at a certain temperature, wherein the heating temperature is lower than the thermal deformation temperature by 60 ℃; the annealing process can reduce the internal stress generated by the diffusion plate in the processing process, so that the surface of the diffusion plate is smoother, the condition that cracks are formed in the diffusion plate can be avoided, the raw material of the diffusion plate extruded from an extruder is more effectively protected, and the quality of the processed diffusion plate is further improved;

s8, traction: the diffusion plate after annealing enters a conveying line, and a roller shaft on the conveying line rotates by itself to drive the diffusion plate to be conveyed forwards continuously;

s9, cutting: after the cooling and conveying temperature of the annealed diffusion plate is reduced to be below 40 ℃ through a plurality of cooling rollers on a conveying workbench, the smooth diffusion plate is sawed into a semi-finished product with a certain length and size by using a length cutting machine, wherein the length cutting machine is used for cutting in a shearing mode, the cutting size is set according to a specification and size chart of each diffusion plate, the thickness of the raw material of the cut diffusion plate is 50mm, and the cutting speed is 8 m/min;

s10, measurement: clamping the cut diffusion plate, gathering a beam of light source to vertically strike the diffusion plate, and observing the haze of the diffusion plate;

s11, stacking: the diffusion plates are sucked up by the suction cups on the carrying device and are stacked, and the surface is not allowed to be visually observed in ripples, transverse swage marks, cracks, contact seams, strip lines and scratches in the stacking process.

Example two

S1, batching: proportioning the PS raw material and the dispersing agent according to a diffusion plate proportioning table in a metering mode, and then uniformly mixing and stirring the proportioned PS raw material and the dispersing agent for 17 min;

s2, feeding: conveying the mixed raw materials into a hopper through a screw feeder;

s3, heating: putting raw materials in a hopper into a charging barrel of an extruder, wherein the raw materials sequentially pass through a first charging barrel area, a second charging barrel area, a third charging barrel area, a fourth charging barrel area, a fifth charging barrel area, a sixth charging barrel area, a seventh charging barrel area and an eighth charging barrel area, and then pass through a vacuum tube, a connecting sleeve and a transverse head, wherein the temperature of the first charging barrel area is set at 200 ℃, the temperature of the second charging barrel area is set at 200 ℃, the temperatures of the third charging barrel area, the fourth charging barrel area, the fifth charging barrel area, the sixth charging barrel area, the seventh charging barrel area and the eighth charging barrel area are set at 230 ℃, the temperatures of the vacuum tube, the connecting sleeve and the transverse head are set at 230 ℃, and the three-roller surface cleaning mode is to lightly wipe the surfaces of the three rollers by using;

s4, extrusion: before extrusion, the cleanliness of the surfaces of the three rollers needs to be checked, the standard of the check is that stains, scratches and concave-convex points with the diameter of 0.1mm or more are not allowed to exist, raw materials in a molten state are injected into gaps of the three rollers from a die head of the extruder by using the extruder, wherein the temperature of the three rollers is set at 100 ℃, and the length of an extrusion area production line is 14 m;

s5, cooling: setting the ambient temperature at 35 ℃, controlling the temperature of the raw materials by the ambient temperature, and slowly cooling the raw materials, wherein the detection period of the ambient temperature is 8 hours/time;

s6, embossing: embossing the cooled and molded diffusion plate by using an embossing roller with patterns on the surface;

s7, annealing: placing the embossed diffusion plate in a drying oven with hot air circulation at a certain temperature, wherein the heating temperature is lower than the thermal deformation temperature by 60 ℃; the annealing process can reduce the internal stress generated by the diffusion plate in the processing process, so that the surface of the diffusion plate is smoother, the condition that cracks are formed in the diffusion plate can be avoided, the raw material of the diffusion plate extruded from an extruder is more effectively protected, and the quality of the processed diffusion plate is further improved;

s8, traction: the diffusion plate after annealing enters a conveying line, and a roller shaft on the conveying line rotates by itself to drive the diffusion plate to be conveyed forwards continuously;

s9, cutting: after the cooling and conveying temperature of the annealed diffusion plate is reduced to be below 40 ℃ through a plurality of cooling rollers on a conveying workbench, the smooth diffusion plate is sawed into a semi-finished product with a certain length and size by using a length cutting machine, wherein the length cutting machine is used for cutting in a shearing mode, the cutting size is set according to a specification and size chart of each diffusion plate, the thickness of the raw material of the cut diffusion plate is 50mm, and the cutting speed is 8 m/min;

s10, measurement: clamping the cut diffusion plate, gathering a beam of light source to vertically strike the diffusion plate, and observing the haze of the diffusion plate;

s11, stacking: the diffusion plates are sucked up by the suction cups on the carrying device and are stacked, and the surface is not allowed to be visually observed in ripples, transverse swage marks, cracks, contact seams, strip lines and scratches in the stacking process.

The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.