ADD: Yuhuan Qinggang, Zhejiang, China
Tel:0086 576 8991 5676
Fax:0086 576 8991 5678
Fracture of the Syringe Mould Due to improper temperatu […]
Due to improper temperature control, the forging mold material itself has cracked. In this case, the only way to change the template is to change the template. Cracks and even broken templates in production are often caused by excessive heat treatment hardness and excessive stress of the selected materials. Cracking is easy to occur during welding. In severe cases, especially during welding, hard materials are easy to crack. The template stress is too large and the impact cracks are mostly at the sharp corners of the cavity. If it can still be used, it can be perforated and cut in an I-shaped mosaic, or it can be hugged around the template.
In particular, thermosetting plastic molds and aluminum alloy injection molds are severely worn. Insufficient hardness of the movable parts in the injection mold, sharp corners, improper material selection, etc. are also causes of wear. For highly corrosive products and plastics with considerable hardness and fillers, the surface of the materials we choose should be corrosion resistant and have high surface hardness.
The heat dissipation of the long core mold is very important, and the selection of appropriate materials has a big gap between the appearance of the product and the output of the product. For example, beryllium copper and other materials containing beryllium and cobalt are selected, after heat treatment, they have higher strength, hardness, fatigue resistance, wear resistance and good heat transfer.
One of the reasons for material deformation is that in order to reduce costs, the actual mold material used is not a special mold steel. The template has insufficient rigidity, insufficient thickness, improper heat treatment, residual stress, and EDM stress. The above reasons often interact and increase The amount of deformation. In addition to the corresponding solution during processing, widen the mold foot or use the afterburner at each point in the middle of the mold to withstand it. Some molds are not very demanding, and can be heated and deformed at a high temperature instantly at the focus position, which is quite effective. People often grind off the edge of the template to reduce the contact surface. It is necessary to minimize the grinding depth to facilitate the effective life of the mold. It is difficult to correct the deviation of the angular dimension of the cavity after the template is deformed. The too tight core causes the cavity to be deformed by the wall. This phenomenon is particularly serious when there are multiple cavities. If you barely use it, the flash in the middle of the template will not change of Medical Mould.