Processing method of syringe mold cavity

  • Precautions for processing plastic Syringe Mould cavity are as follows.

    1. In the CNC milling of cavity parts, from the rough shape of the regular shape to the part processing before the finishing treatment, since the cavity is usually manufactured with copper electrodes matched with it, the milling process is generally based on the rough machining tool path. Mainly, supplemented by local surface finishing.
    2. With parting surface and pillow surface, when they are to be processed together, the parting surface and pillow surface should be processed in place, leaving no margin. Leave a margin of 0.2~0.5mm in the cavity for sparking. Can leave a margin of 0.5mm. A margin of 0.1mm can be reserved for the cavity bumping and rubbing locations, which is used for moving and fixing molds.
    3. Use a large-diameter fillet knife when roughing. If the diameter of the tool is too small, it is easy to break and snap off the knife. The fillet cutter has a large diameter, good rigidity, and durability. It is usually used for roughing of the cavity when roughing, and it is also used for finishing. When the tool rigidity is not enough, it will bend and vibrate, which will lead to the inability to process normally.
    4. In the case of using the system default parameters, the tool path range in surface machining is calculated based on the movement path of the tool center axis, that is, the actual machining area is one tool radius larger than the selected tool path range limit box. Set the parameters of the tool path range limit box reasonably to avoid the processing range exceeding the actual processing needs.

    The core is made of steel like the cavity, and the material is hard, so you should try to use a tool with a handle for processing. The problem often encountered in core processing is that the ball-end cutter is not easy to clear the sharp corners. At this time, the end mill can be used to go to the curved surface and to process the clear corners. Pay attention to the cooperation between the core and the hidden core frame. When processing the hidden core frame, pay attention to the empty knife several times, otherwise the hidden core frame will have a slope, that is, the upper side is accurate and the lower side is small, so it is difficult to match Die, especially the deeper hidden core frame, must pay attention to this problem, the cutting tool of the finishing frame of Safety Needle Mould should also be new, and use a larger tool.