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绪论 …………………………………………………………………1
模塑工艺规程的编制 ………………………………………3
1.1 塑件的工艺性分析 …………………………………………………3
1.2 计算塑件的体积和质量 ……………………………………………4
1.3 选用成型设备 ………………………………………………………5
1.4 注射量的校核 ………………………………………………………5
1.5 注射压力校核和锁模力校核 ………………………………………5
注塑模结构设计……………………………………………7
2.1 分型面的选择 ………………………………………………………7
2.2 确定型腔的排列方式 ………………………………………………7
2.3 浇注系统的设计 ……………………………………………………8
成型零件工作尺寸的计算 ………………………………13
3.1 型腔的工作尺寸计算 ……………………………………………13
3.2 小型芯的计算 ……………………………………………………14
3.3 螺纹型芯的计算 …………………………………………………14
3.4 型腔侧厚壁和底板厚度的计算 …………………………………15
成型零件材料的选用 ……………………………………17
合模导向机构的设计 ……………………………………18
脱模顶出机构的设计 ……………………………………19
6.1 推出机构设计 ……………………………………………………19
6.2 脱模机构设计 ……………………………………………………19
其他结构零件的设计 ……………………………………20
7.1 推杆 ………………………………………………………………20
7.2 复位杆 ……………………………………………………………20
7.3 模板设计 …………………………………………………………21
7.4 垫块设计 …………………………………………………………21
7.5 支撑柱 ……………………………………………………………21
7.6 推板 ………………………………………………………………21
模具加热与冷却系统的计算 ……………………………22
8.1 求塑件在硬化四每小时释放的热量 ………………………………22
8.2 求冷却水的体积流量 ………………………………………………22
模具闭合高度的确定 ……………………………………23
注射机有关参数的校核 …………………………………24
绘制模具总装图和非标准件零件工作图 ………………25
结论 ………………………………………………………26
致谢 ………………………………………………………………28
参考文献 …………………………………………………………29
摘要
本课题所设计的模具是螺纹注塑模。此模具是典型的三板式模具,即双分型面注塑模,双分型面注塑模有两个分型面,开模时,模具首先沿Ⅰ—Ⅰ面分型分型后浇注系统凝料由此取出;继续开模,模具沿Ⅱ—Ⅱ面分型,分型后塑件由此脱出。本塑件采用的材料是流动性和成型性优良、成品率高,但易出现裂纹,成型塑件脱模斜度不宜过小的PS。在注射过程中为便于制品成型,应尽量缩短塑料在注射过程中的流程。为了不影响塑件的外观和使用性能此模具采用点浇口形式。为成型塑件的内螺纹部分,需要一个螺纹型芯。该模具采用模外手工脱模方式,为保证螺纹型芯在开模时被带往动模,设置了由环形拉簧及卡环组成的卡环装置。为了保证生产的连续性,螺纹型芯应有备件,以供循环使用。
关键词: 双分型面 点浇口 螺纹型芯 卡环装置
Abstract
The mould that this subject designs is moulded by the note of the whorl . This mould is a mould of three typical modes in Chinese operatic music, namely a note is moulded in each type, each type a note moulds two type one, while opening the mould, the mould pours the system to congeal the material to take out from this after the dividing type assigning to type Ⅰ- Ⅰ first of all; Continuing opening the mould, the mould moulds one to deviate from from this after the dividing type along the dividing type Ⅱ - Ⅱ Mould pieces of material that adopt mobility and shaping fine, yield high originally, but apt to appear crackle, shaping should not mould pieces of drawing of patterns slope over little PS. In process of injection among for benefit products shaping,should try hard shorten plastics procedure on process of injection. For not influencing this mould of appearance and serviceability which mould one to adopt some runner forms. For shaping mould piece interior whorl part,need one piece whorl type core. This mould adopt mould outside craft drawing of patterns way,for guarantee whorl type the cores while opening the mould take move by mould, Carlos made up of annular extension spring and card ring to set up surround the device. For guarantee produce continuity,whorl type the cores should have spare part,for recycle.
Keyword: Each type Some runner Whorl type core The card surrounds the device










