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    • 5. 发明申请
    • Process of dosing a starting material for optical lenses
    • 给光学透镜的起始材料配料的过程
    • US20070001329A1
    • 2007-01-04
    • US11452537
    • 2006-06-14
    • Peter HagmannAxel HeinrichIris Leder-BruckBernhard SeiferlingWerner Steffan
    • Peter HagmannAxel HeinrichIris Leder-BruckBernhard SeiferlingWerner Steffan
    • B29D11/00
    • B29D11/0023B29C31/045B29L2011/0041Y10S425/808
    • A process of dosing a starting material (SM) for optical lenses, into a female mould half (2), comprises the steps of: positioning a dosing tip (1) at a start position (P2) above the female mould half (2) and close to the edge of or laterally outside that portion (20) defining the lens-shaping surface, creating a continuous flow of starting material (SM) through the dosing tip (1) into the female mould half (2), moving the dosing tip (1) from the start position (P2) towards an end position (P3) in the region of the centre of the female mould half (2) once the starting material (SM) has contacted the surface (21) of the female mould half (2) with the dosing tip (1) being in the start position (P2), wherein the continuous flow of starting material (SM) through the dosing tip (1) and the movement of the dosing tip (1) from the start position (P2) to its end position (P3) are controlled such, that a continuous bead (B) of starting material (SM) is deposited on the surface (21) of the female mould half (2) and that the essential part of the overall volume of starting material (SM) dosed into the female mould half (2) is deposited within the female mould half (2) with the dosing tip (1) being in the end position (P3).
    • 将用于光学透镜的起始材料(SM)投入到阴半模(2)中的过程包括以下步骤:将定量给料头(1)定位在母模半部(2)上方的起始位置(P 2) )并且靠近限定透镜成形表面的该部分(20)的边缘或侧向外侧,从而通过配量末端(1)产生连续的起始材料流(SM)到阴模半体(2)中, 一旦起始材料(SM)接触了表面(21),母模半部(2)的中心区域中,将起始位置(P 2)从起始位置(P 2)向端部位置(P 3) 具有给药尖端(1)的母模半部(2)处于起始位置(P 2),其中通过定量给料头(1)的起始材料(SM)的连续流动和给药末端(1)的运动 )从起始位置(P 2)到其结束位置(P 3)被控制为使得起始材料(SM)的连续珠(B) 位于阴半模(2)的表面(21)上,并且投入到阴半模(2)中的起始材料(SM)的总体积的主要部分被沉积在阴半模(2)内, 剂量尖端(1)处于最终位置(P 3)。
    • 9. 发明授权
    • Molding arrangement to achieve short mold cycle time and method of
molding
    • 成型布置实现短模周期时间和成型方法
    • US5545366A
    • 1996-08-13
    • US257794
    • 1994-06-10
    • Victor LustW. Anthony MartinKornelis RenkemaWybren Van Der Meulen
    • Victor LustW. Anthony MartinKornelis RenkemaWybren Van Der Meulen
    • G02C7/04B29C33/00B29C33/04B29C33/06B29C33/30B29C33/38B29C33/56B29C45/26B29C45/37B29C45/73B29D11/00B29K25/00B29L11/00B29C45/20
    • B29D11/0048B29C33/306B29C33/3842B29C33/56B29C45/37B29C45/73B29D11/00038B29D11/0023B29C2045/7343B29C2045/7362B29L2011/0016B29L2031/757Y10S425/808Y10S425/812
    • An arrangement for molding a front or back polystyrene mold half which is used, with a second complementary back or front mold half, for subsequent molding of a soft contact lens such as a hydrogel soft contact lens. Each mold half defines a convex curved surface and a concave curved surface spaced therefrom, with one of the surfaces defining an optical quality curved surface for the soft contact lens. A heated molding machine introduces molten polystyrene through a hot runner system to a plurality of mold cavities, each of which defines an optical quality curved surface and also a second noncritical surface. The optical quality surface of the mold cavity is positioned further away from the heated hot runner side of the mold than the second surface, which allows faster cooling of the optical quality surface of the mold cavity. Each mold cavity has a first insert on the optical quality side of the mold cavity and a second insert on the second side. Each of the first and second inserts has a circumferential cooling passageway defined therearound or in proximity for the first inserts, and also includes a bubbler positioned internally therein. Coolant is circulated in a turbulent mode through the circumferential passageways and also through the bubblers against inner surfaces of the insert to provide rapid cooling of the mold cavity.
    • 用于模制前或后聚苯乙烯半模的装置,其具有第二互补的后模或前半模,用于随后模制诸如水凝胶软性隐形眼镜的软性隐形眼镜。 每个模具半部限定凸起的弯曲表面和与其间隔开的凹形曲面,其中一个表面限定用于软性隐形眼镜的光学质量弯曲表面。 加热成型机将熔融聚苯乙烯通过热流道系统引入到多个模腔中,每个模腔限定光学质量曲面和第二非临界表面。 模腔的光学质量表面定位成比第二表面更远离模具的加热热流道侧,这允许更快地冷却模腔的光学质量表面。 每个模腔在模腔的光学质量侧具有第一插入件,在第二侧上具有第二插入件。 第一和第二插入件中的每一个具有围绕第一插入物限定在其周围或邻近的周向冷却通道,并且还包括位于其内部的起泡器。 冷却剂以湍流模式通过周向通道循环,并且还通过鼓泡器抵靠插入件的内表面,以提供模腔的快速冷却。