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    • 1. 发明授权
    • Method of preparing resin coated foundry sand using unsaturated polyester
    • 使用不饱和聚酯制备树脂涂层铸造砂的方法
    • US4396571A
    • 1983-08-02
    • US329507
    • 1981-12-10
    • Akira OyamadaKoue OhkawaKazumi TanakaIsao Suyama
    • Akira OyamadaKoue OhkawaKazumi TanakaIsao Suyama
    • B22C1/22C08F283/01C08F299/00C08F299/04C08K9/08C08L67/06
    • B22C1/2266C08K3/34C08K9/08Y10T428/2998
    • In preparing a resin coated sand for use in sand mold casting processes by a hot-melt process using an unsaturated polyester which is solid at room temperature as the coating material, a solution of an organic peroxide as a polymerization initiator for the unsaturated polyester is introduced into the mixture of heated foundary sand and the unsaturated polyester while the polyester is in the state of liquid coating on the sand particles, and stirring is continued to uniformly mix the solution with the unsaturated polyester and evaporate and dissipate the solvent before solidification of the polyester coating as the result of cooling of the mixture. The polyester coating contains no liquid cross-linking agent, so that the resin coated sand is untacky and high in fluidity at room temperature and, therefore, can be filled into a die cavity to shape a sand mold or core with sufficiently high bulk density.
    • 在通过使用在室温下为固体的不饱和聚酯作为涂层材料的热熔方法制备用于砂模铸造工艺中的树脂涂布砂时,引入作为不饱和聚酯的聚合引发剂的有机过氧化物溶液 进入加热的砂和不饱和聚酯的混合物,同时聚酯处于砂粒上的液体涂覆状态,继续搅拌以使该溶液与不饱和聚酯均匀混合,并在聚酯固化之前蒸发并消散溶剂 作为混合物冷却的结果。 聚酯涂层不含液体交联剂,使得树脂涂布的砂在室温下是非粘性的且流动性高,因此可以填充到模腔中以形成具有足够高堆积密度的砂模或芯。
    • 3. 发明授权
    • Production method of polyamide
    • 聚酰胺的生产方法
    • US07138482B2
    • 2006-11-21
    • US10701440
    • 2003-11-06
    • Kazumi TanakaHideyuki KuroseTakatoshi ShidaMinoru Kikuchi
    • Kazumi TanakaHideyuki KuroseTakatoshi ShidaMinoru Kikuchi
    • C08G69/04C08G69/28C08G69/26
    • C08G69/28C08G69/04
    • In the production method of polyamide of the present invention, the mole balance at a set point during melt polymerization is estimated from a pre-established equation for calculating the mole balance during melt polymerization from a melt viscosity. On the basis of the estimated mole balance, the subsequent conditions of melt polymerization of a batch and the polymerization conditions of the next and subsequent batches are determined. In addition, the mole balance, molecular weight and relative viscosity of melt-polymerized polyamide are estimated from pre-established equations each for respectively calculating the mole balance, molecular weight and relative viscosity at the end point of melt polymerization from the melt viscosity. The conditions for solid phase-polymerizing the melt-polymerized polyamide are determined on the basis of estimated values.
    • 在本发明的聚酰胺的制造方法中,从熔融粘度计算熔融聚合时的摩尔平衡的预先设定的方程,估算熔融聚合时的设定点的摩尔平衡。 基于估计的摩尔平衡,确定批次的熔融聚合的后续条件和下一批和后续批次的聚合条件。 此外,熔融聚合聚酰胺的摩尔平衡,分子量和相对粘度由预先建立的方程估算,各自分别用于分别从熔体粘度计算熔融聚合终点处的摩尔平衡,分子量和相对粘度。 基于估计值确定熔融聚合的聚酰胺的固相聚合条件。
    • 10. 发明授权
    • Grinder having mechanism for regulating rotation of wheel guard
    • 研磨机具有调节车轮护罩旋转的机构
    • US08550885B2
    • 2013-10-08
    • US12972217
    • 2010-12-17
    • Kazumi Tanaka
    • Kazumi Tanaka
    • B24B55/05
    • B24B55/052B24B23/028
    • A grinder includes a housing, a gear cover attached to the housing by a plurality of screws, a spindle case attached to the gear cover, a wheel guard rotatably mounted on the spindle case for covering approximately a half of a disc-shaped tool bit attached to a spindle, a stop piece that regulates the rotation of the wheel guard. The wheel guard is selectively fixed to and unfixed from the spindle case. The stop piece is fixed to the housing together with the gear cover by at least one of the plurality of screws. The stop piece has an abutting section at which the stop piece abuts the wheel guard to regulate the rotation of the wheel guard. The abutting section is located at a position deviated from an axial line of the at least one of the plurality of screws.
    • 研磨机包括壳体,通过多个螺钉附接到壳体的齿轮盖,附接到齿轮盖的主轴壳体,可旋转地安装在心轴壳体上的轮护罩,用于覆盖附接的盘形工具头的大约一半 一个主轴,一个调节车轮护罩旋转的止挡件。 车轮护罩选择性地固定到主轴壳体上并且与主轴壳体不固定。 止动件通过多个螺钉中的至少一个与齿轮罩固定到壳体。 止挡件具有邻接部分,止挡件邻近车轮护罩以调节车轮护罩的旋转。 所述抵接部位于与所述多个螺钉中的至少一个的轴线偏离的位置。