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洗發(fā)水瓶蓋注塑成型工藝及模具設(shè)計
摘 要:本次模具設(shè)計的內(nèi)容是“洗發(fā)液瓶蓋注塑模的設(shè)計”。這個制品的結(jié)構(gòu)近似一個殼體，主蓋與其上面的小蓋以鉸鏈相連，打開后，小蓋固定在一特定位置，合上后與主蓋成一整體。設(shè)計內(nèi)容是從零件的工藝分析開始的，根據(jù)工藝要求來確定設(shè)計的大體思路。其開始是從零件的材料選擇，接下是成型參數(shù)、密度、收縮率的確定，模具種類與模具設(shè)計的關(guān)系、塑件的尺寸精度與結(jié)構(gòu)、注射機的選擇、模具設(shè)計有關(guān)尺寸的計算（包括模具行腔型芯的計算及其公差的確定）、注塑機參數(shù)的校核、模具結(jié)構(gòu)設(shè)計、模具冷卻、加熱系統(tǒng)計算、注射模標(biāo)準(zhǔn)件的選用及總裝技術(shù)要求等內(nèi)容。
其中模具結(jié)構(gòu)設(shè)計是這次設(shè)計的主要內(nèi)容，其內(nèi)容包含了模具的分型面選擇、主流道及分流道的設(shè)計與布局，推出機構(gòu)導(dǎo)向機構(gòu),鉸鏈的設(shè)計等一系列模具的重要零部件的設(shè)計加工方法和加工注意要點。
塑料瓶蓋的材料選用聚丙烯。首先用UG進行洗發(fā)水瓶蓋的三維造型，利用CAD/CAE作出輔助分析，通過查閱各種資料，完成包括形狀及尺寸方面的數(shù)據(jù)運算，然后根據(jù)洗發(fā)水瓶蓋的結(jié)構(gòu)特點設(shè)計了模具的型芯、型腔、脫模及整體結(jié)構(gòu)。此模具的結(jié)構(gòu)較為復(fù)雜，動模和定模都采用了鑲拼結(jié)構(gòu)。由于生產(chǎn)批量較大，采用一模兩腔、對排的布置方式。由于聚丙烯對熱較敏感，且此塑件的壁厚較薄，經(jīng)過計算此設(shè)計可以不必加設(shè)冷卻水道。此外，為了縮短模具的生產(chǎn)周期，提高生產(chǎn)率，本設(shè)計在很多地方采用標(biāo)準(zhǔn)件，例如模架，導(dǎo)柱導(dǎo)套。
關(guān)鍵詞：洗發(fā)液瓶蓋，注塑模，鉸鏈，PC
Shampoo Bottle Cap Injection Molding Process
and Mold Design
ABSTRACT:The mold design and the contents of the shampoo bottle injection mold design. The structure of the products approximate a shell, the main cover their above cover is connected to the hinge, open, small cover at a particular location, close the main cover as a whole. Design from parts of the process began to determine the design according to process requirements of the general idea. Start is selected from the parts of the materials, took over the molding parameters, density, shrinkage to determine the types of mold and die design, the choice of dimensional accuracy and structural plastic parts, injection machine, mold design and calculation of the size (including computing and its tolerance of the cavity mold line core), the checking of the parameters of injection molding machines and mold structure design, mold cooling, heating system calculation, injection mold standard parts selection andassembly of technical requirements and content.
Which mold structure design is the main content of the design contains the mold parting surface of choice, sprue and shunt design and layout, the introduction of agency-oriented institutions, the important parts of the hinge design and a series of molds design and processing methods and processing points to note.
Shampoo bottle is made of polypropylene. First Pro/E is used to form three-dimensional shape of the cap of shampoo bottle, CAD/CAE makes an assisted analysis. After reading a variety of available information, the data computation of the shape and size could be completed. And then the cap of shampoo bottle in accordance with the structural characteristics of the design of the mold the core, cavity, and the overall structure of molding. The structure of this mold is rather complex, the dynamic and determined mold are both adopted composite structure. Due to the larger quantities of production, A two-mode cavity is used, the arrangement of row. As the polypropylene is more sensitive to heat, and the thinner wall thickness of plastic parts, in this design can be calculated do not need additional cooling water. In addition, in order to shorten the production cycle of mold, and improve productivity, the design adopts standard in many places , such as mold, lead guide sets of columns.
KEY WORDS: shampoo bottle cap, injection mold, hinge, PC
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