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导致注塑模具制造困难的五大难题

来源:http://www.schaosen.com 日期:2019-12-03 发布人:admin 浏览次数:
  注塑模具是一种注射兼模塑的成型方法,但是对于复杂的立体型面加工难度比较大,特别是型腔的盲孔型内成型表面加工,如果采用传统的加工方法,不仅要求工人技术水平高、辅助工夹具多、刀具多,而且加工的周期长。
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  Injection mold is a kind of molding method of injection and molding, but it is difficult to process the complex three-dimensional surface, especially for the blind hole internal molding surface of the cavity. If the traditional processing method is adopted, it requires not only high technical level of workers, more auxiliary jigs, more tools, but also long processing cycle.
  目前一般塑件的尺寸精度要求为IT6-7,表面粗糙度Ra0.2-0.1μm,相应的注塑模具零件的尺寸精度要求达到IT5-6,表面粗糙度Ra0.1μm以下。
  At present, the dimensional accuracy of general plastic parts is required to be it6-7, the surface roughness Ra 0.2-0.1 μ m, the dimensional accuracy of corresponding injection mold parts is required to be it5-6, and the surface roughness Ra 0.1 μ m or less.
  激光盘记录面的粗糙度要达到镜面加工的水平的0.02-0.01μm这就要求模具的表面粗糙度达到0.01μm以下。长寿命注塑模具对于提高高效率和降低成本是很必要的,目前注塑模具的使用寿命一般要求100万次以上。
  The surface roughness of the laser disk recording surface should be 0.02-0.01 μ m of the mirror processing level, which requires the surface roughness of the mold to be less than 0.01 μ M. Long life injection mold is necessary to improve efficiency and reduce cost. At present, the service life of injection mold generally requires more than 1 million times.
  精密注塑模要用刚度大的模架,增加模板的厚度,增加支承柱或锥形定位元件以防止模具受压力后产生变形,有时内压可以达到100MPa。
  For precision injection mould, the mould base with large rigidity shall be used, the thickness of the mould shall be increased, and the supporting column or cone positioning element shall be increased to prevent the mould from deforming under pressure. Sometimes the internal pressure can reach 100MPa.
  顶出装置是影响制品变形和尺寸精度的重要因素,因此应该选择最佳的顶出点,以使各处脱模均匀。高精度注塑模具在结构上多数采用镶拼或全拼结构,这要求模具零部件的加工精度、互换性均大为提高。
  Ejecting device is an important factor that affects the deformation and dimensional accuracy of products. Therefore, the best ejecting point should be selected to make all parts demoulded evenly. In the structure of high-precision injection mold, most of them adopt the splicing or full splicing structure, which requires the processing accuracy and interchangeability of mold parts to be greatly improved.
  对于注塑件而言,大多是与其它零部件配套组成完整的产品,而且在很多的情况下都是在其它部件已经完成,急切等待注塑件的配套上市。因为对制品的形状或尺寸精度要求很高,加之由于树脂材料的特性各异,模具制造完成后,还需要反复地试模与修正,使开发和交货的时间非常紧张。
  For injection parts, most of them are complete products matched with other parts, and in many cases, they have been completed in other parts, waiting for the matching of injection parts to be listed. Because of the high requirements for the shape or size accuracy of products, and because of the different characteristics of resin materials, after the completion of mold manufacturing, it is necessary to test and modify the mold repeatedly, which makes the development and delivery time very tight.
  模具制造不是最终目的,而是由用户提出最终制品设计,模具制造厂家根据用户的要求,设计制造模具而且在大多数情况下,制品的注射生产也在别的厂家。这样就造成了产品的设计、模具设计制造和制品的生产异地进行的情况。
  Mold manufacturing is not the ultimate goal, but the end product design is put forward by the user. According to the user's requirements, mold manufacturers design and manufacture molds, and in most cases, injection production of products is also in other manufacturers. In this way, the product design, mold design and manufacturing and the production of products are carried out in different places.
  模具生产批量小,一般属于单件的生产,但是模具需要很多的标准件,大到模架,小到顶针,这些不能也不可能只由一个厂家单独完成,且制造工艺复杂,普通设备和数控设备使用极不均衡。
  The mould production batch is small, generally belongs to the production of single piece, but the mould needs a lot of standard parts, ranging from mold base to thimble, which cannot and cannot be completed by only one manufacturer alone, and the manufacturing process is complex, and the use of common equipment and numerical control equipment is extremely uneven.

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