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直齒圓柱齒輪注塑模設(shè)計(jì)
摘 要：本設(shè)計(jì)題目為直齒圓柱齒輪注塑模設(shè)計(jì)，體現(xiàn)了塑料齒輪在受力不大場(chǎng)合代替鋼是很有前景的。所以本設(shè)計(jì)對(duì)我今后深入設(shè)計(jì)齒輪埋下一定的功力。
本設(shè)計(jì)運(yùn)用塑料成型工藝及模具設(shè)計(jì)的基礎(chǔ)知識(shí)，首先分析了塑件的成分及性能要求，為選取澆口的類型做好了準(zhǔn)備；然后估算了塑件的體積，便于選取注塑機(jī)及確定型腔數(shù)量；最后分析了塑件的特征，確定模具的設(shè)計(jì)參數(shù)、設(shè)計(jì)要點(diǎn)及推出裝置的選取。
本塑件齒輪外側(cè)的側(cè)孔與開(kāi)模方向不一致，所以在脫模時(shí)必須考慮設(shè)計(jì)側(cè)抽機(jī)構(gòu)，以便開(kāi)模過(guò)程的時(shí)，使塑件能順利脫模。本副模具采用推管脫模，一模兩件。一模多件容易降低同軸精度，推桿脫模亦不易保證齒輪精度。
型腔采用鑲拼式組合，這樣便于加工、熱處理，也可以利用其配合間隙來(lái)排氣。缺點(diǎn)：強(qiáng)度不高，配合面不好的話容易變形。
關(guān)鍵詞：注塑模 澆口 推塊
Spur Gear Injection Mold Design
Abstract: The design entitled spur gear injection mold design, reflects the large plastic gear occasions in lieu of steel is very promising. Therefore, the design of the design of future in-depth gear I planted some skill.
The use of plastic molding process design and die design of the basic knowledge, the first analysis of the plastic parts of the composition and performance requirements, in order to select the type of gate ready; and then estimated the volume of plastic parts for injection molding machine to select and determine the type cavity number; the final analysis of the characteristics of plastic parts, molds to determine the design parameters, design features and the introduction of the selected device.
Plastic parts of the lateral side gear hole direction inconsistent with the open mode, it must be taken into account in the design of Demoulding side pumping in order to open mold process, the plastic parts so that a smooth release. Deputy dies in this release using push tube, a two-mode. A multi-coaxial easy to reduce accuracy, putting Demoulding gear would not be easy to ensure accuracy.?
Combined use of cavity so easy processing, heat treatment, can also make use of its space to tie in with the exhaust. Disadvantages: intensity is not high, with not so easy to surface deformation.
Key words:?Injection Molding? Gate Push block