声呐面罩壳八滑块六次抽芯复合机构注塑模具设计
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摘要
结合塑件的自动化成型需要及脱模困难问题,采用计算机辅助工程(CAE)分析及计算机辅助设计(CAD)技术,设计了一模一腔2点点浇口三板模注塑模具,模具中模腔的注塑采用2个点浇口进行浇注,腔内排气采用δ≤0.02 mm的镶件间隙进行排气;冷却采用14条独立水路进行冷却,以保证塑件收缩变形的均匀性。针对塑件脱模困难的问题,设计了3个油缸驱动滑块机构来实施外壁特征的脱模;设计了一种8滑块6次抽芯复合机构来实施内壁特征的抽芯脱模。内壁脱模机构中,通过第一油缸驱动先完成2次抽芯动作和1次滑块移位动作,完成部分特征的脱模并为为后续滑块的抽芯动作腾出抽芯动作运动空间;再利用第二油缸驱动完成1次驱动抽芯,和2次抽芯动作,从而实现塑件内壁的完全无干涉脱模。
Combined with the requirements for automatic formation and also considering ofa difficulty in mold release, an injection mold with one cavity with 2 point gates and three plate die was designed by means of CAE analysis and CAD structure-aided design technology. Two point gates were designed for the injection mold cavity, and the exhaust of the cavity was carried out by using the gap between the inlay pieces with a dimension less than 0.02 mm. A 14-independent-waterway system was adopted for the cooling system to ensure the uniformity of shrinkage deformation for the plastic parts. To overcome the difficulty in demolding of plastic parts, three cylinder-driven slider mechanisms were designed to conduct the demoldingof the characteristic exterior walls, and a composite mechanism with 8 sliders and 6-time pulling core was designed to conduct the core-pulling demolding of the characteristic interior walls. In the inner-wall demolding mechanism, the first cylinder drive completed two core-pulling operations and one slider displacement at first and then completes partial demolding. This provides a space for core-pulling action and the subsequent core-pulling action of the slider. Furthermore, the second cylinder drive completes one core-pulling operation and two core-pulling operations, thus realizing the complete non-interference demolding for the inner wall of the plastic parts. With a reasonable structure, this mechanism has a reliable operation and good practicability.
Combined with the requirements for automatic formation and also considering ofa difficulty in mold release, an injection mold with one cavity with 2 point gates and three plate die was designed by means of CAE analysis and CAD structure-aided design technology. Two point gates were designed for the injection mold cavity, and the exhaust of the cavity was carried out by using the gap between the inlay pieces with a dimension less than 0.02 mm. A 14-independent-waterway system was adopted for the cooling system to ensure the uniformity of shrinkage deformation for the plastic parts. To overcome the difficulty in demolding of plastic parts, three cylinder-driven slider mechanisms were designed to conduct the demoldingof the characteristic exterior walls, and a composite mechanism with 8 sliders and 6-time pulling core was designed to conduct the core-pulling demolding of the characteristic interior walls. In the inner-wall demolding mechanism, the first cylinder drive completed two core-pulling operations and one slider displacement at first and then completes partial demolding. This provides a space for core-pulling action and the subsequent core-pulling action of the slider. Furthermore, the second cylinder drive completes one core-pulling operation and two core-pulling operations, thus realizing the complete non-interference demolding for the inner wall of the plastic parts. With a reasonable structure, this mechanism has a reliable operation and good practicability.
引文
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[16] 王怀奥,肖国华.电饭煲注塑模具自动脱模机构及控制机构设计[J].中国塑料,2017,31(9):137-144.WANG H A,XIAO G H.Design of Automatic Demoulding Mechanisms and Control Mechanism for Injection Molds of Rice Cookers[J].China Plastics,2017,31(9):137-144.
[17] 郑爱权.多特征脱模机构与模板开闭控制机构设计[J].塑料,2017,46(6):52-56.ZHENG A Q.Design of Six Plate Fixed Distance Parting Type Automatic Demoulding Mechanism[J].Plastics,2017,46 (6):52-56.
[2] 周云其.塑料产品结构设计注意事项探讨[J].装备制造技术,2016(8):129-130.ZHOU Y Q.Discussion on the Matters Needing Attention in the Structure Design of Plastic Products[J].Equipment manufacturing technology,2016 (8):129-130.
[3] 李秋生.结合快速样件制造技术加速CIMS在塑料产品设计与模具制造中的应用[J].模具技术,1997(2):83-86.LI Q S.To Combin with Rapid Prototype Technology,Accelerate the Application of Cims in Plastic Product Design and Mould Manufacturing[J].Die and Mould Technology,1997 (2):83-86.
[4] 李旭.ABS塑料产品设计模型制作与探索[J].科技传播,2011(8):50-50.LI X.ABS Plastic Product Design Model Making and Exploration[J].Public Communication of Science & Technology,2011 (8):50-50.
[5] 彭国荣,隋丽丽,陆龙福.基于数学建模的三次顶出反转式圆弧脱模机构设计[J].中国塑料,2018,32(5):135-143.PENG G R,SUI L L,LU F L.Design of Three Ejection Reversing Circular Arc Stripping Mechanism Based on Mathematical Modeling[J].China Plastics,2018,32(5):135-143.
[6] 范国良,路英华.周转箱注塑模具及其四侧面滑块推出脱模机构设计[J].工程塑料应用,2018,46(9):94-99.FAN G L,LU Y H.Design of Injection Mould with Four Sides Slider Ejection Demoulding Mechanism for Returnable Container[J].Engineering Plastics Application,2018,46 (9):94-99.
[7] 张建卿.洗涤机屏蔽盖双滑动三次抽芯注塑模脱模机构设计[J].塑料科技,2016,44(1):87-89.ZHANG J Q.Demoulding Mechanism Design for the Injection Molding of Washing Machine Shield Cover with Thrice Slide-drawing and Double T-grooves[J].Plastics Science and Technology,2016,44(1):87-89.
[8] 李淑玉,田福祥.三板式强制脱模U形塑料夹注塑模设计[J].塑料科技,2011,39(3):75-77.LI S Y,TIAN F X.Design on Injection Mould with Three Plates and Forced Demould for U Form Plastic Chip[J].Plastic Science and Technology,2011,39 (3):75-77.
[9] 张亚民,丁立刚,吴磊.塑料旋钮注塑模具螺纹脱模机构的设计[J].机电工程技术,2013(7):125-128.ZHANG Y M,DING L G,WU L.Thread Demoulding Mechanism Design for Plastic Knob Injection Mould[J].Mechanical & Electrical Engineering Technology Engineering technology,2013 (7):125-128.
[10] 张敏.浅谈塑料模具中的顺序脱模机构[J].广西轻工业,2010(4):42-43.ZHANG M.Talking about Sequential Demoulding Mechanism in Plastic Mould[J].Guangxi Journal of Light Industry,2010 (4):42-43.
[11] 江昌勇,王科,王波,等.塑料斜齿轮注塑模具脱模机构的优化[J].工程塑料应用,2013,41(11):70-73.JIANG C Y,WANG K,WANG B,et al.Ejection Mechanism Optimization of Injection Mold for Plastic Helical Gear[J].Engineering plastics Application ,2013,41 (11):70-73.
[12] 胡邓平,王树勋,张宁,等.基于电动圆弧抽芯的塑料花洒注塑工艺分析及模具创新设计[J].塑料科技,2017,45(1):81-84.HU D P,WANG S X,ZHANG N,et al.Injection Technology Analysis and Innovation Mould Design of Plastic Shower Nozzle Based on Motor-driven Arc Core-pulling[J].Plastic Science and Technology,2017,45(1):81-84.
[13] 石环城.塑料密封盖模具及脱模装置的设计[J].机械制造,2018,56(7):100-102.SHI H C.Design of Mould and Demoulding Device for Plastic Sealing Cover[J].Machinery,2018,56(7):100-102.
[14] 何柏海,何骏.一种带推管侧顶脱模机构的注塑模设计[J].工程塑料应用,2016,44(2):92-95.HE B H,HE J.Design of Injection Mould with Pushing Tube Side Ejection Demoulding Mechanism[J].Enginee-ring Plastics Application,2016,44(2):92-95.
[15] 徐生,肖国华,沈忠良,等.内藏式型针侧抽芯二次顶出脱模机构及其模具设计[J].工程塑料应用,2016,44(3):79-83.XU S,XIAO G H,SHEN Z L,et al.Design for Secondary Ejection Release Mechanism with Built-in Type Needle Side Core-pulling and It’s Injection Mould[J].Engineering Plastics Applications,2016,44 (3):79-83.
[16] 王怀奥,肖国华.电饭煲注塑模具自动脱模机构及控制机构设计[J].中国塑料,2017,31(9):137-144.WANG H A,XIAO G H.Design of Automatic Demoulding Mechanisms and Control Mechanism for Injection Molds of Rice Cookers[J].China Plastics,2017,31(9):137-144.
[17] 郑爱权.多特征脱模机构与模板开闭控制机构设计[J].塑料,2017,46(6):52-56.ZHENG A Q.Design of Six Plate Fixed Distance Parting Type Automatic Demoulding Mechanism[J].Plastics,2017,46 (6):52-56.