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    • 1. 发明专利
    • Manufacture of back metal of plastering trowel
    • 塑料履带背部金属的制造
    • JPS5964134A
    • 1984-04-12
    • JP17339882
    • 1982-10-01
    • Yoshiaki Obayashi
    • OOHAYASHI YOSHIAKI
    • B21K11/00B23P15/00
    • B23P15/00
    • PURPOSE:To fix a back metal firmly to a trowel plate and prolong the service life of a plastering trowel by providing small projections in a line on the back of the back metal when forming the back metal provided between a trowel plate and a handle. CONSTITUTION:An upper die 2 having small holes arranged in a line is opposed to a lower die 4 having a long groove 3. A red hot columnar material 5 is put in between the upper die 2 and lower die 4 and worked under pressure. A bulged part between the upper die 2 and lower die 4 formed by working is removed by cutting. A handle 6 is attached to the back metal 5a thus formed, and small projections 7 are inserted in to holes 9 pierced on the trowel plate 8.
    • 目的:当形成设置在t刀板和手柄之间的背面金属时,通过在背面金属背面的一条线上提供小的突出部分,将背面金属牢固地固定在t刀板上并延长抹灰抹布的使用寿命。 构成:具有排列成一行的小孔的上模2与具有长槽3的下模4相对。将红热柱状材料5放入上模2和下模4之间并在加压下加工。 在上模2和通过加工形成的下模4之间的凸起部分通过切割而被去除。 将手柄6安装在如此形成的背面金属5a上,将小突起7插入穿在t刀板8上的孔9中。