TWI404625B - Method for injecting lightguide - Google Patents
Method for injecting lightguide Download PDFInfo
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- TWI404625B TWI404625B TW97143070A TW97143070A TWI404625B TW I404625 B TWI404625 B TW I404625B TW 97143070 A TW97143070 A TW 97143070A TW 97143070 A TW97143070 A TW 97143070A TW I404625 B TWI404625 B TW I404625B
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- light guide
- guide plate
- injection molding
- injection
- manufacturing
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- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
本發明涉及一種製造導光板之方法,尤其涉及一種注射成型製造薄形導光板之方法。 The present invention relates to a method of manufacturing a light guide plate, and more particularly to a method of injection molding a thin light guide plate.
目前較為成熟之製造導光板之技術係採用注射成型(Injection Molding)機,將導光板材料熔融後推進注射成型機之模腔內,保持模腔之壓力並冷卻導光板材料,然後將成型之產品取出。 At present, the more mature technology for manufacturing light guide plates uses an injection molding machine to melt the light guide plate material and then push it into the cavity of the injection molding machine, maintain the pressure of the cavity and cool the material of the light guide plate, and then mold the product. take out.
惟,傳統之注射成型機之注射速度和注射壓力較低,成型之導光板厚度較厚,使得採用該導光板之背光模組體積大、質量較大,不適應產品輕、薄之需要。 However, the injection speed and injection pressure of the conventional injection molding machine are relatively low, and the thickness of the formed light guide plate is thick, so that the backlight module using the light guide plate has a large volume and a large mass, and is not suitable for the light and thin products.
有鑒於此,有必要提供一種注射成型製造薄形導光板之方法。 In view of the above, it is necessary to provide a method of injection molding a thin light guide plate.
一種注射成型製造導光板之方法,包括:於4000至4500千牛頓之鎖模力、2000至4000千克力/平方釐米之注射壓力以及600至1000毫米/秒之注射速度下注射成型導光板。 A method for producing a light guide plate by injection molding, comprising: injection molding a light guide plate at a clamping force of 4000 to 4500 kN, an injection pressure of 2000 to 4000 kgf/cm, and an injection speed of 600 to 1000 mm/sec.
本實施例於高注射壓力和注射速度注射成型導光板,高注射 速度和壓力可提高產品之尺寸精度,並可製造出厚度薄之產品;該方法不僅可製造較薄之導光板,也可節約材料,降低採用導光板之背光模組之體積。 This embodiment injection molding light guide plate at high injection pressure and injection speed, high injection Speed and pressure can increase the dimensional accuracy of the product, and can produce thin products. This method can not only manufacture thinner light guide plates, but also save materials and reduce the volume of backlight modules using light guide plates.
10‧‧‧動模 10‧‧‧moving
20‧‧‧定模 20‧‧ ‧ fixed mode
30‧‧‧模腔 30‧‧‧ cavity
40‧‧‧螺桿 40‧‧‧ screw
50‧‧‧材料 50‧‧‧Materials
60‧‧‧導光板 60‧‧‧Light guide plate
圖1係本發明實施例注射成型製造導光板之方法之流程圖。 1 is a flow chart of a method for injection molding a light guide plate according to an embodiment of the present invention.
圖2係本發明實施例注射成型製造導光板過程中提供之注射成型機之示意圖。 2 is a schematic view of an injection molding machine provided during the injection molding process of manufacturing a light guide plate according to an embodiment of the present invention.
圖3係本發明實施例注射成型製造導光板過程中之合模示意圖。 3 is a schematic view showing a mold clamping process in the process of injection molding a light guide plate according to an embodiment of the present invention.
圖4係本發明實施例注射成型製造導光板過程中之注射材料之示意圖。 4 is a schematic view showing an injection material during injection molding of a light guide plate according to an embodiment of the present invention.
圖5係本發明實施例注射成型製造導光板過程中之取出導光板之示意圖。 FIG. 5 is a schematic view showing the removal of a light guide plate in the process of injection molding a light guide plate according to an embodiment of the present invention.
下面結合附圖對本發明實施例作詳細描述。 The embodiments of the present invention are described in detail below with reference to the accompanying drawings.
如圖1所示,本發明實施例注射成型製造導光板之方法主要包括以下步驟:將動模與定模合模,形成模腔,動模和定模之間具有4000至4500千牛頓之鎖模力;以6000至1000毫米/秒之注射速度以及2000至4000千克力/平方釐米之注射壓力向模腔內注射材料; 保持模腔之壓力;冷卻;開模,取出產品。 As shown in FIG. 1, the method for manufacturing a light guide plate by injection molding according to an embodiment of the present invention mainly comprises the following steps: clamping a movable mold and a fixed mold to form a cavity, and having a lock of 4000 to 4500 kN between the movable mold and the fixed mold. Mould force; injecting material into the cavity at an injection speed of 6000 to 1000 mm/sec and an injection pressure of 2000 to 4000 kgf/cm; Maintain the pressure of the cavity; cool; open the mold and remove the product.
如圖2所示,注射成型製造導光板之注射設備包括動模10和定模20。工作過程中,定模20相對固定,而動模10相對定模20運動。 As shown in FIG. 2, an injection apparatus for injection molding a light guide plate includes a movable mold 10 and a stationary mold 20. During operation, the fixed mold 20 is relatively fixed, and the movable mold 10 is moved relative to the fixed mold 20.
如圖3所示,動模10於驅動裝置之驅動下靠近定模20,使得動模10和定模20之間形成一個模腔30。 As shown in FIG. 3, the movable mold 10 is driven by the driving device to be close to the fixed mold 20, so that a cavity 30 is formed between the movable mold 10 and the fixed mold 20.
本實施例中,採用伺服馬達驅動之雙曲軸式之合模裝置將動模10和定模20合模,該合模裝置可產生高達4000至4500千牛頓(kN)之鎖模力,該伺服馬達之功率為30至35千瓦。高鎖模力可保證於注射成型時,動模10和定模20之間不會發生溢料之現象。 In this embodiment, the movable mold 10 and the fixed mold 20 are clamped by a double-crank type clamping device driven by a servo motor, and the clamping device can generate a clamping force of up to 4000 to 4500 kN (kN). The power of the motor is 30 to 35 kW. The high clamping force ensures that no flashing occurs between the movable mold 10 and the fixed mold 20 during injection molding.
曲軸之機械效能係數為35。 The mechanical performance factor of the crankshaft is 35.
如圖4所示,螺桿40以600至1000毫米/秒(mm/s)之注射速度以及2000至4000千克力/平方釐米(kgf/cm2)之注射壓力將熔融之材料50注射入模腔30中。 As shown in FIG. 4, the screw 40 injects the molten material 50 into the cavity 30 at an injection speed of 600 to 1000 mm/sec (mm/s) and an injection pressure of 2000 to 4000 kgf/cm2 (kgf/cm2). in.
注射壓力優選3000至4000千克力/平方釐米,注射速度優選800至1000毫米/秒。 The injection pressure is preferably 3,000 to 4,000 kgf/cm, and the injection speed is preferably 800 to 1000 mm/sec.
材料50為聚甲基丙烯酸甲酯(PMMA)、聚碳酸酯(PC)或共聚環狀烯烴(COC)。 Material 50 is polymethyl methacrylate (PMMA), polycarbonate (PC) or copolymerized cyclic olefin (COC).
如圖5所示,保持模腔30內之壓力並冷卻一段時間後,於合模裝置之帶動下,動模10和定模20分開,然後將導光板60取出。 As shown in Fig. 5, after the pressure in the cavity 30 is maintained and cooled for a while, the movable mold 10 and the fixed mold 20 are separated by the mold clamping device, and then the light guide plate 60 is taken out.
上述工藝可製造厚度為0.4至0.8毫米(mm)之導光板,尤其係厚度為0.4至0.6毫米之導光板。 The above process can produce a light guide plate having a thickness of 0.4 to 0.8 millimeters (mm), especially a light guide plate having a thickness of 0.4 to 0.6 mm.
以PC為例,當注射壓力為4000千克力/平方釐米時,導光板60之厚度可達0.15至0.6毫米。 Taking PC as an example, when the injection pressure is 4000 kgf/cm, the thickness of the light guide plate 60 can reach 0.15 to 0.6 mm.
提高注射壓力可成型薄形之產片,提高注射速度可成型形狀複雜及厚度薄之產品,並有利於產品之穩定和提高尺寸精度。 Increasing the injection pressure can form a thin piece, increase the injection speed, and can form a product with complex shape and thin thickness, and is beneficial to product stability and dimensional accuracy.
另外,由於採用高注射壓力和注射速度可製造出厚度較薄之產品,從而可節約材料,減少使用導光板之產品之體積。 In addition, because of the high injection pressure and injection speed, a thinner product can be produced, thereby saving material and reducing the volume of the product using the light guide plate.
綜上所述,本發明確已符合發明專利之要件,遂依法提出專利申請。惟,以上所述者僅為本發明之較佳實施方式,自不能以此限制本案之申請專利範圍。舉凡熟悉本案技藝之人士爰依本發明之精神所作之等效修飾或變化,皆應涵蓋於以下申請專利範圍內。 In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.
Claims (7)
Priority Applications (1)
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TW97143070A TWI404625B (en) | 2008-11-07 | 2008-11-07 | Method for injecting lightguide |
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TW97143070A TWI404625B (en) | 2008-11-07 | 2008-11-07 | Method for injecting lightguide |
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TW201018575A TW201018575A (en) | 2010-05-16 |
TWI404625B true TWI404625B (en) | 2013-08-11 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2435762Y (en) * | 2000-08-30 | 2001-06-20 | 广东梅县梅雁科技开发有限公司 | Light guide board |
TW538260B (en) * | 2000-04-28 | 2003-06-21 | Sumitomo Chemical Co | Method for producing light transmitting plate |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW538260B (en) * | 2000-04-28 | 2003-06-21 | Sumitomo Chemical Co | Method for producing light transmitting plate |
CN2435762Y (en) * | 2000-08-30 | 2001-06-20 | 广东梅县梅雁科技开发有限公司 | Light guide board |
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