Punch assembly
    82.
    发明授权
    Punch assembly 失效
    打孔组装

    公开(公告)号:US4848638A

    公开(公告)日:1989-07-18

    申请号:US88245

    申请日:1987-08-24

    申请人: Takeshi Suzuki

    发明人: Takeshi Suzuki

    CPC分类号: A41H37/00

    摘要: A punch assembly comprising a cylindrical clamper holder, a ram reciprocatingly movable therein and having an axial bore, a punch carried on the ram, a pair of clampers pivotally mounted on the clamper holder and releasably holding a fastening element, a pair of washers received in a lateral slot in the clamper holder and resiliently urged against the ram by springs, and a bolt-and-nut unit extending transversely through the axial bore of the ram and fastening the springs and the washers together.

    摘要翻译: 一种冲头组件,包括圆柱形夹持器支架,可在其中往复运动并具有轴向孔的冲头,承载在冲头上的冲头,可枢转地安装在夹持器支架上并可释放地夹持紧固元件的一对夹具,一对垫圈, 夹持器支架中的横向狭槽并通过弹簧弹性地推靠在冲头上,螺栓和螺母单元横向延伸穿过冲头的轴向孔并将弹簧和垫圈紧固在一起。

    Automatic valve seat build-up welding apparatus
    87.
    发明授权
    Automatic valve seat build-up welding apparatus 失效
    自动阀座积木焊接设备

    公开(公告)号:US4531039A

    公开(公告)日:1985-07-23

    申请号:US451963

    申请日:1982-12-21

    IPC分类号: B23K9/04 B23K9/225

    CPC分类号: B23K9/048

    摘要: An automatic valve seat build-up welding apparatus for a Y-type main steam isolation globe valve used in an atomic power station is disclosed which is characterized in that the valve seat can be build-up welded on the spot by the welding torch introduced into the valve box with the welding operation being carried out remotely from the spot and viewed by an image sensor positioned near the welding torch so that the exposure of an operator to a radioactive environment is prevented.

    摘要翻译: 公开了一种用于原子能发电站的Y型主蒸汽隔离截止阀的自动阀座积聚焊接装置,其特征在于,通过引入的焊炬可以在现场积聚焊接阀座 具有焊接操作的阀箱从现场远程执行,并由位于焊炬附近的图像传感器观察,从而防止了操作者对放射性环境的暴露。

    Process for producing modified polypropylene
    88.
    发明授权
    Process for producing modified polypropylene 失效
    生产改性聚丙烯的方法

    公开(公告)号:US4483966A

    公开(公告)日:1984-11-20

    申请号:US421243

    申请日:1982-09-22

    CPC分类号: C08F297/083

    摘要: A process for producing ethylene-propylene block copolymer by the use of a catalyst employed for producing isotactic polypropylene is provided. This process is characterized in that a gas phase polymerization of propylene is substantially carried out in the presence of the catalyst obtained by combining a titanium trichloride composition with an average particle size of 10.about.100 .mu. and an organic aluminum to form the propylene polymer segment with a specific surface area more than 0.015 m.sup.2 /g at a yield of more than 3,000 g per 1 g of the titanium trichloride composition in the first step, and then a gas phase polymerization of a mixture of polypropylene and ethylene is successively carried out in the second step to form the copolymer segment with a copolymerization ratio of propylene:ethylene being 5.about.80 weight %:95.about.20 weight %, wherein the polymerized amount of the second step is 10-40% of total polymerized amount and wherein normal hexane extraction ratio (75.degree. C., 1 hour) of the ethylene-propylene block copolymer powders obtained is 1.about.10 weight %. The process of the present invention is one having an extremely high productivity industrially, and the modified polypropylene obtained has a superior low-temperature-impact strength and brittle temperature.

    摘要翻译: 提供了通过使用用于制备全同立构聚丙烯的催化剂制备乙烯 - 丙烯嵌段共聚物的方法。 该方法的特征在于丙烯的气相聚合基本上在通过将平均粒径为10-600微米的三氯化钛组合物和有机铝组合而获得的催化剂的存在下进行,以形成丙烯聚合物链段, 比表面积大于0.015m 2 / g,第一步中每1g三氯化钛组合物的产量大于3,000g,然后在聚丙烯和乙烯的混合物中进行气相聚合 形成共聚物链段的第二步,丙烯:乙烯的共聚比为5分子量80重量%:95重量比20重量%,其中第二步的聚合量为总聚合量的10-40%,其中正常己烷萃取 获得的乙烯 - 丙烯嵌段共聚物粉末的比例(75℃,1小时)为10重量%。 本发明的方法在工业上具有极高的生产率,所得到的改性聚丙烯具有优异的低温冲击强度和脆性温度。