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    • 73. 发明授权
    • Microwave molding of polymers
    • 微波成型聚合物
    • US07223087B2
    • 2007-05-29
    • US10868574
    • 2004-06-15
    • Razmik Akopyan
    • Razmik Akopyan
    • B29C35/08
    • B29C35/0805B29C33/3828B29C33/3835B29C45/1761B29C45/53B29C45/74B29C2035/0855
    • A mold for relatively uniform heating and molding of a work material to form a workpiece using a microwave oven, includes upper and lower mold members and a sidewall mold member. The mold members are formed from materials selected to have an approximately equal effective thermosensitivity. The effective thermosensitivity of work material is its dissipation factor divided by the product of its dielectric constant, density and specific heat. The effective thermosensitivity of the material of mold layer of each mold member is its dissipation factor divided by the product of its dielectric constant, density, and specific heat and multiplied by the fraction of the mass of its mold layer divided by the total mass of this mold member. A metal sleeve is formed on an inner surface of the sidewall mold member with microwave absorbing material formed on the outside thereof and inner surfaces of the end mold members may also be coated with metal or other highly thermally conductive and wear resistant material.
    • 使用微波炉对工件进行相对均匀的加热和模制以形成工件的模具包括上下模具构件和侧壁模具构件。 模具构件由选择为具有大致相等的有效热敏性的材料形成。 工作材料的有效热敏性是其耗散因子除以其介电常数,密度和比热的乘积。 每个模具构件的模具层的材料的有效热敏性是其耗散因数除以其介电常数,密度和比热的乘积乘以其模层的质量分数除以其总质量 模具成员。 在侧壁模具的内表面上形成有在其外侧形成有微波吸收材料的金属套筒,并且端模构件的内表面也可以涂覆有金属或其它高导​​热和耐磨材料。
    • 74. 发明申请
    • Apparatus for Extruding Polymers Employing Microwave Energy
    • 用于挤出使用微波能量的聚合物的装置
    • US20070102848A1
    • 2007-05-10
    • US11563315
    • 2006-11-27
    • Jan WeberScott Schewe
    • Jan WeberScott Schewe
    • H05B6/64B29C35/10
    • A61M25/1029A61M25/1027A61M25/1034A61M25/1036B29B13/024B29C33/06B29C35/0805B29C45/14655B29C47/0023B29C47/0026B29C47/0033B29C47/0071B29C47/86B29C47/862B29C47/8835B29C47/884B29C47/8895B29C47/903B29C47/907B29C49/0042B29C49/64B29C49/66B29C49/78B29C49/783B29C2035/0855B29C2049/0089B29C2793/009B29K2105/258B29L2022/022B29L2031/7542H05B6/80
    • An apparatus and method for molding balloon catheters is disclosed. The balloon may be molded by providing a polymeric tube within a mold having an interior cavity in the shape of the desired balloon. Microwave energy, which may be generated by a gyrotron, may then be directed toward the mold, to heat the polymeric material without heating the mold. Once heated, pressurized fluid may be injected into the tube to blow the polymeric material against the interior cavity whereupon the material can cool to form the balloon or can be further heatset by additional microwave energy and be cooled to form the balloon. In accordance with one embodiment, microwave energy can also be used without a mold to form a medical device. A polymer extrusion apparatus is disclosed utilizing a microwave energy for heating polymer feedstock material within the extruder tip and die unit just prior to formation of the extrudate product. A cooling bath mechanism, which in one embodiment can also include a cooling tube member having a cooling medium forced therethrough, is also disclosed. An apparatus for preparing polymer disk members, to use as the polymer feedstock material for the microwave extrusion apparatus, is also disclosed. Apparatus for interconnecting and rotating the polymer disk members, the die tip, or the die, or any combination thereof, for creating angularity characteristics in the polymer extrudate, is also disclosed.
    • 公开了一种用于模制球囊导管的装置和方法。 可以通过在具有所需球囊形状的内部空腔的模具内提供聚合物管来模制球囊。 可以由陀螺仪产生的微波能量然后可以被引向模具,以加热聚合材料而不加热模具。 一旦加热,加压流体可以被注入到管中以将聚合物材料吹向内部空腔,由此该材料可以冷却以形成球囊,或者可以通过额外的微波能量进一步热固并被冷却以形成气囊。 根据一个实施例,微波能量也可以在没有模具的情况下用于形成医疗装置。 公开了一种聚合物挤出设备,其利用微波能量来在挤出物产物形成之前在挤出机顶端和模具单元内加热聚合物原料。 还公开了一种冷却浴机构,其在一个实施例中还可以包括具有强制通过其中的冷却介质的冷却管构件。 还公开了一种用于制备用于微波挤出装置的聚合物原料的聚合物盘构件的装置。 还公开了用于互连和旋转聚合物盘构件,模头或模具或其任何组合的装置,用于在聚合物挤出物中产生角度特性。