訂書機外殼注射模設(shè)計
摘要：本畢業(yè)設(shè)計說明書詳細介紹訂書機外殼塑件的注射模設(shè)計。主要內(nèi)容是材料(聚丙稀PP)特性分析，塑料注射模的結(jié)構(gòu)設(shè)計、標準件的選擇、模具材料選擇、典型零件的數(shù)控加工3G程序代碼編程設(shè)計。該塑件外表面要求達到境面，內(nèi)部有彎曲的加強肋，底部進行文字加工，不但有外側(cè)抽芯成型兩個圓柱孔、兩個半圓柱孔及圓柱孔旁邊的淺孔，還有內(nèi)側(cè)抽芯成型內(nèi)部四個突臺。外側(cè)抽芯距離短，模架小，在型腔板上固定彎銷來實現(xiàn)側(cè)抽芯。由于塑件中部有兩不易成型的圓肋，采用了增加兩個小型芯鑲件的辦法減少加工模具的難度。整體外形為曲面，不能用傳統(tǒng)的加工工藝，而是在Pro/E建模的基礎(chǔ)上電火花成型。
關(guān)鍵詞: 訂書機外殼；注射模設(shè)計；側(cè)抽芯；曲面
The Design of the Book Sewer outside Shell Injection Mold
Abstract： This graduate design instruction book has introduced the design of the book sewer outside shell injecting molding in detail. It mainly contains the analysis of property of the material (polypropylene PP), the structural design of injection mold, the selection of standardized part and the material of injection mold, the 3G code NC part programming for typical part. The surface of this plastic part should be mirror finished. The inside of it has bending reinforcing rib. The bottom of it should be worked with words. It not only has two cylindrical pore、two half cylindrical pore and short-hole beside the cylindrical pore that should be formed by outside extracting part, but also has four lug formed by inside extracting part. The distance of extracting is short and the mould is small, so fixing angle block on the cavity die is to finish outside extracting. Because the inside of the plastic part has two round ribs that are difficult to be formed, two inserts are added to make it easier to form mold. The integral surface is camber. It can’t be formed by conventional job operation, so spark machine is needed to form it on the basis of Pro/E molding foundation.
Key words : book sewer; design of injection mold; outside extracting; camber