CN116072786A - 制造发光钟表组件的方法 - Google Patents

制造发光钟表组件的方法 Download PDF

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CN116072786A
CN116072786A CN202211335949.8A CN202211335949A CN116072786A CN 116072786 A CN116072786 A CN 116072786A CN 202211335949 A CN202211335949 A CN 202211335949A CN 116072786 A CN116072786 A CN 116072786A
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S·纳波利
N·弗朗索瓦
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Swatch Group Research and Development SA
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    • G04—HOROLOGY
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    • G04B19/00—Indicating the time by visual means
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    • G04B19/12—Selection of materials for dials or graduations markings
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/30—Illumination of dials or hands
    • G04B19/32—Illumination of dials or hands by luminescent substances
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    • H01—ELECTRIC ELEMENTS
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Abstract

制造发光钟表组件的方法。本发明涉及一种制造用于便携物品的发光钟表组件的方法。

Description

制造发光钟表组件的方法
本发明的技术领域
本发明涉及一种制造发光钟表组件的方法。本发明还涉及由所述制造方法获得的这种钟表组件。
技术背景
光致发光材料的使用在市场上相当普遍，并且这用于各种应用，如指针或快慢针（indices）。
磷光（Phosphorescence）技术在钟表领域中常通过各种装饰方法使用以照亮指针、表盘和其它组件。
荧光技术也使用荧光颜料通过移印法或喷涂法用于内部零件组件的装饰以用多种颜色装饰手表和该组件。
另一方面，表盘和指针通常由金属材料制成，然后在多个精整步骤后，用磷光或荧光墨水装饰。
这种设计具有多个缺点：
- 发光性能的限制，对于当前的装饰方法，磷光和荧光墨水的厚度限于大约100微米；
- 装饰方法的复杂化，在磷光装饰前有时需要白色底涂层以具有不透明装饰并使性能最大化；
- 完全不透明的组件限制了设计。
发明概述
本发明的目标是没有上述缺点的制造发光钟表组件的方法。
本发明涉及一种制造用于便携物品的发光钟表组件的方法，其包括以下步骤：
- 制备10至40重量%的量的磷光颜料、1至4重量%的量的荧光颜料和最大量为10重量%的增塑剂的预混合物；
- 将聚合物基料与所述预混合物混合并第一次挤出所得混合物以获得均匀聚合物混合物；
- 第二次挤出所述聚合物混合物以形成厚度为至少0.3 mm的条带；
- 切割所述条带以获得所需发光钟表组件；
根据本发明的其它有利的变体：
- 所述聚合物基料是热塑性聚合物基料；
- 所述聚合物基料在近紫外光谱的波长下和在可见光谱的波长下是透明的；
- 所述热塑性聚合物基料选自聚碳酸酯、PMMA等；
- 所述挤出条带在环境温度下冷却；
- 第一次挤出借助双螺杆挤出机进行；
- 第二次挤出借助单螺杆挤出机进行；
- 在第二次挤出的过程中获得的条带是分为两部分的条带形式，被称为上部的第一部分由在第一次挤出结束时获得的发光混合物形成，且被称为下部的第二部分由白色聚合物材料制成的条带形成。
本发明还涉及由这样的方法获得的发光钟表组件。
本发明还涉及包括至少一个这样的钟表组件的钟表。
发明详述
本发明涉及一种制造用于便携物品的发光钟表组件的方法，以及所得发光钟表组件。
发光是指该组件是光致发光的、荧光的、磷光的或其组合。
磷光是指具有能够吸收光并以更长的波长再发射光的性质的元素。当发光激发停止时，该发射持续一段时间。墨水含有至少一种光致发光剂，以赋予墨水光致发光性质。优选地，发光剂是荧光剂。其有利地选自无机荧光团和有机镧系络合物。根据另一替代方案，荧光剂也可选自有机荧光团。其可以是，例如，荧光素、铕1,3-二苯基-1,3-丙二酸酯-1,10-菲罗啉、掺杂硫氧化钆、掺杂铝酸镁和铝酸钡、掺杂铝酸锂、掺杂钼酸锶。
荧光是指具有能够吸收光并以更长的波长再发射光的性质的元素。当发光激发停止时，该发射停止。
现在将描述根据本发明的制造方法的各种步骤。
在第一步骤的过程中，预混合物由10至40重量%的量的磷光颜料、增塑剂和4重量%的量的荧光颜料制成以获得足够明显的日光颜色而不折损磷光性能。选择发光粒子的量以充分能够使装饰的钟表组件界限分明并使其在暗处容易且立即可见。增塑剂以10重量%的最大量存在以随后调节聚合物基料的延展性并因此使其在操作和机械加工的过程中脆性较低。这种预混使得可以涂覆颜料，在该方法的剩余过程中防止它们磨损并促进它们并入聚合物基料中。聚乙烯、石蜡或聚二甲氧基硅烷常用作增塑剂。
以1至4重量%的量加入日光荧光颜料，这使得可以改变日间可见的颜色，因为这些荧光颜料是有色的。这些日光荧光颜料具有日光色，这不同于在日间光线下具有中性色但受紫外光激发的紫外光荧光颜料。它们也可以通过能量转换增强和改变磷光效应。例如，如果使用浅蓝色（Light Blue）磷光颜料并加入粉色荧光颜料，则最终夜间发射颜色将是粉/紫色。因此可以根据制成的混合物使日间可见的荧光色对应于夜间可见的磷光色。
在下一步骤的过程中，由预混合物和聚合物基料制成混合物，然后第一次挤出预混合物以获得均匀混合物并将发光粒子分布到聚合物基料中，且由此防止对钟表组件上的视觉呈现（visual rendering）和发光颜料的性能都有害的粒子簇。由此将基料聚合物与基于增塑剂和颜料的预混合物混合，以使链之间的滑移成为可能。
所用聚合物基料可以是热塑性聚合物，如聚碳酸酯（PC）、聚酰胺（PA）、甲基丙烯酸甲酯丙烯腈丁二烯苯乙烯（MABS）、二醇化聚对苯二甲酸乙二醇酯（PETg）等。有利地，所用聚合物基料在近紫外光谱的波长下和在可见光谱的波长下都是透明的，这使得该颜料能够更好地吸收光。
优选地，借助双螺杆挤出机进行挤出以获得均匀混合物和颜料的良好分散。在该第一次挤出结束时，材料通常以粒状物形式输出，这使得可以在该方法的剩余过程中促进运输和储存。
在第一次挤出的过程中获得的材料随后在单螺杆挤出机上再次挤出，该单螺杆挤出机配备用于制备厚度为至少0.3 mm的压延条带的模头。厚度明显可根据最终希望获得的钟表组件而变化。本发明人已经注意到，在0.3 mm的厚度以下，部件太脆并且机械强度不高。例如，0.15 mm的指针太柔软并具有不均匀的机械性能，该指针无法支撑其自重。因此，为了确保良好性能和良好强度，需要0.3 mm的最小厚度。
根据本发明的一个变体，在第二次挤出的过程中获得的轮廓是分为两部分的条带形式，被称为上部的第一部分由在第一次挤出结束时获得的混合物形成，且被称为下部的第二部分由白色聚合物材料制成的条带形成。这样的布置使得可以在由发光材料制成的涂层下方获得反射涂层并因此获得更好的性能。
没有厚度上限。可以直接制作该厚度的部件并且如果该部件是平坦的，则切割该部件。也可以挤出更厚的条带并在切割后将部件机械加工以校正它们的厚度。例如，对于指针，为了能够切割最大指针的顶部和较细的脚爪。出于成本原因，模头可调整成适应最大指针的截面以挤出其轮廓。
一旦化合物已经再次挤出，切割该条带——例如通过冲压或激光切割，以获得所需发光钟表组件。
最后，最后一个任选步骤包括通过印刷或蚀刻装饰所得钟表组件使得只有该组件的发光部分可见。
根据本发明，这种方法能够获得发光表盘或指针。
实施方案的实施例
通过将最大量为10重量%的增塑剂与10至40重量%的量的光致发光颜料（粒度D50：15-20 µm）混合制成预混合物，随后加入1至4重量%的量的荧光颜料。增塑剂能够提高该材料的坚固性（solidity）并优化磷光颜料-基质相互作用。
随后将聚合物基料与该预混合物混合。
该混合物通过第一次双螺杆挤出进行均质化。
随后进行化合物的第二次挤出以形成厚度至少0.3 mm的条带。
条带在环境温度下冷却。
一旦条带形成并冷却，其借助激光或冲压进行切割以获得所需钟表件（timepieces）。

Claims (10)

1.一种用于便携物品的发光钟表组件的制造方法，其包括以下步骤：
- 制备10至40重量%的量的磷光颜料、1至4重量%的量的荧光颜料和最大量为10重量%的增塑剂的预混合物；
- 将聚合物基料与所述预混合物混合并第一次挤出所得混合物以获得均匀聚合物混合物；
- 第二次挤出所述聚合物混合物以形成预定厚度的条带；
- 切割所述条带以获得所需发光钟表组件。
2.根据权利要求1所述的制造方法，其特征在于所述聚合物基料是热塑性聚合物基料。
3.根据权利要求1或2所述的制造方法，其特征在于所述聚合物基料在近紫外光谱的波长下和在可见光谱的波长下是透明的。
4.根据权利要求1至3所述的制造方法，其中所述热塑性聚合物基料选自聚碳酸酯、PMMA。
5.根据权利要求1至4所述的制造方法，其中所述挤出条带在环境温度下冷却。
6.根据权利要求1至5所述的制造方法，其中第一次挤出借助双螺杆挤出机进行。
7.根据权利要求1至6所述的制造方法，其中第二次挤出借助单螺杆挤出机进行。
8.根据权利要求1至6所述的制造方法，其中在第二次挤出的过程中获得的条带是分为两部分的条带形式，被称为上部的第一部分由在第一次挤出结束时获得的发光混合物形成，且被称为下部的第二部分由白色聚合物材料制成的条带形成。
9.根据权利要求1至8所述的制造方法，其中所形成的发光钟表组件为表盘或指针。
10.通过根据权利要求1至8中任一项所述的方法获得的发光钟表组件。
CN202211335949.8A 2021-10-29 2022-10-28 制造发光钟表组件的方法 Pending CN116072786A (zh)

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EP21205701.2 2021-10-29
EP21205701.2A EP4174585A1 (fr) 2021-10-29 2021-10-29 Procédé de fabrication d'un composant horloger luminescent

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