共查询到20条相似文献,搜索用时 140 毫秒
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介绍了光盘注塑模具中气动辅助脱模机构的应用原理与设计方法,该机构有效地减少了光盘脱模时的变形,大大提高了加工精度和生产率。 相似文献
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郑志敏 《现代制造技术与装备》2022,(8):160-162
利用自动脱模方法设计了具有内螺纹注塑产品的模具,使液压马达带动主动齿轮,驱动从动齿轮,同时在止转机构的作用下带动螺纹型芯旋转,实现内螺纹塑件自动脱模。利用此方法可以充分利用模具空间,使得脱模具有结构简单、易加工及调整维修方便的特点,可利用液压马达调节旋出速度,并通过弹簧推出机构的设计解决拉料钩与液压马达干涉的问题,实现低成本制造、高效率脱模内螺纹产品注塑模具。 相似文献
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斜齿轮的齿面是一个螺旋形的渐开线曲面,曲面的方向与注塑模具脱模方向有一个螺旋角.为了解决斜齿轮脱模,应用轴承转动,设计了旋转顶出机构,根据斜齿轮实际情况采用了两种机构,通过3个实例进行脱模机构的设计和旋转关键件的描述,阐述了斜齿轮脱模机构设计要点. 相似文献
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塑料压力盖模具设计与制造 总被引:1,自引:0,他引:1
本设计为塑料压力盖模具设计,介绍了压力盖注射模的结构及工作过程,着重介绍了一种新颖的采用斜导柱驱动方法进行侧向抽芯机构的结构设计,并阐述了该模具的工作过程,介绍了注射模设计中采用的强制脱模、滑动型延时顶出机构。涉及到注射机各种参数的选取、零部件的加工方法、注射模的结构及相关的计算问题、特种加工工艺及塑料的回收和利用等方面内容。 相似文献
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An experimental study on ejection forces of injection molding 总被引:2,自引:0,他引:2
Tetsuo Sasaki Nobuhiro Koga Kenji Shirai Yoshikazu Kobayashi Ayumu Toyoshima 《Precision Engineering》2000,24(3):270
In injection molding, the ejection forces decrease when the surface roughness of mold decreases. However, the ejection forces increase contrary in the area of surface roughness is less than 0.2 μmRa. Several kinds of PVD films are coated on the mold cores to prevent the increasing of ejection forces. Some of these PVD films showed effective prevention of increasing of ejection forces. 相似文献
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根椐塑料垫的结构特点,设计了由对称布置在模具内部的四组齿轮齿条斜抽芯机构、推杆推出机构等主要部分组成的四型腔单分型面注塑模。介绍了注塑模主要零件的结构设计,注塑机的选择,模具的校核和工作原理。设计的模具结构紧凑、合理,工作可靠。 相似文献
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Khurram Altaf Ahmad Majdi Abdul Rani Faiz Ahmad Masri Baharom Vijay R. Raghavan 《Journal of Mechanical Science and Technology》2016,30(11):4901-4907
Polymer injection molds are generally manufactured with metallic materials, such as tool steel, which provide reliable working of molds and extended service life. The manufacture of injection molds with steel is a prolonged process because of the strength of steel. For a short prototype production run, one of the suitable choices could be the use of aluminum-filled epoxy material, which can produce a functional mold in a short time as compared with a conventionally machined tool. Aluminum-filled epoxy tooling is a good choice for short production runs for engineering applications, yet works best for relatively simple shapes. The advantages in relation to the fabrication of injection molds with epoxy-based materials include time saving in producing the mold, epoxy curing at ambient temperature, and ease of machining and post processing. Nevertheless, one major drawback of epoxy material is its poor thermal conductivity, which results in a relatively longer cooling time for epoxy injection molds. This study investigates some of the innovative ideas for enhancing the thermal conductivity for epoxy molds. The basic concept behind these ideas was to embed a highly thermally conductive metal insert within the mold between cavities with an innovative design of cooling channels called profiled cooling channels. This technique will increase the effective thermal conductivity of the epoxy mold, leading to the reduction in cooling time for the injection molded polymer part. Experimental analysis conducted in the current study also verified that the mold with profiled cooling channels and embedded metal insert has significantly reduced the cooling time. 相似文献
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分析了电源按钮的成形工艺性,介绍了利用Pro/E软件中的模具制造模块及其注塑模设计专家(EMX4.1)设计电源按钮注塑模具的过程。对于产品尾部的小孔采用侧向分型抽芯机构,为降低侧型芯的加工难度,采用了组合式侧滑块。实践证明:该模具结构合理可靠,并能保证产品成形质量,对此类产品的注塑模具设计有一定的参考价值。 相似文献