Shanghai Daoqin Plastics Co., Ltd.

         plastics product separation outer and inner 螺纹两 types, degree high outer generally use block molding, inner 螺纹则 large more need 卸螺纹 plant/unit.

        今天 simple introduction inner demolding methods, focus/key point introduction gears and selection.

        一, 卸螺纹 plant/unit classification

        1, as methods separation

        ① 螺纹 type 芯转动, sheet/plate product 脱离;

        ② 螺纹 type 芯转动 meanwhile rear 退, product 自然脱离.

        2, 按驱动 methods separation

        ① 油缸+齿 strip/profile

        ② 油马达/ electrical machine +链 strip/profile

        ③ 齿 strip/profile +锥 degree gears

        ④ 福线螺母

        二, design steps

        必 must product below/following data (见 lower 图)

        ①“D”——螺纹 outer

        ②“P”——螺纹牙距

        ③“L”——螺纹牙 long

        ④ 螺纹 specifications / direction /头数

        ⑤ type amount

        2, 确定螺纹 type 芯转动圈数:

        U=L/P + Us

        U type 芯转动圈数

        Us safety 系数, is ensure full 旋出螺纹 add amount, generally 取0.25~1

        3, gears 模数, and ratio:

        模数决定 gears thick, 齿数决定 gears outer 径, ratio 决定啮 combined gears speed.

         in front has necessary lower gears parameters and combined conditions.

        三, gears parameters and combined conditions

         mold 卸螺纹 machine in large more application is 直齿圆柱 gears, but also generally is 渐开线直齿圆柱 gears, therefore lower 面就以渐开线直齿圆柱 gears is research for 象.

        1 gears basic requirements

        ① requirements 瞬时传动 ratio 恒定不变

        ② requirements has 足够 承载 can force and relatively long use lifespan

        2, 直齿圆柱 gears combined basic 定律

        两 gears 廓不论 in 何处接触, 接触点 as combined gears method 线, must and 两轮连心线 versus 交于一点“C”, this can ensure gears 瞬时传动 ratio 不变. will has “C”点连起 就 formed 2 outer 切圆, is separation degree 圆, separation degree 圆圆心距即 gears 圆心距. lower 图

        3, 渐开线直齿圆柱 gears parameters

         separation degree 圆直径------“d” table/sheet 示

         separation degree long --------“S” table/sheet 示

         gears 齿距--------“p” table/sheet 示

         gears thick --------“sk” table/sheet 示

         gears wide --------“ek” table/sheet 示

         gears 齿数--------“z” table/sheet 示

         gears 模数--------“m” table/sheet 示

         gears pressure 角--------“ɑ” table/sheet 示

         gears ratio --------“i” table/sheet 示

         gears in 心距--------“l” table/sheet 示