What problems should be paid attention to in injection molds

Update:21-08-2020
Summary:

The injection cycle time is as short as possible under […]

The injection cycle time is as short as possible under the premise of ensuring product quality. The shorter the injection cycle time, the more the production quantity, the lower the manufacturing cost per unit product. Injection cycle time includes: injection time, holding pressure time, cooling time (melting time), mold opening time, ejection time (including dwell time), door opening time, pickup time, door closing time, and mold clamping time (special The situation also includes the forward/backward time of the shooting stage and the time of spraying release agent).

The most important methods to shorten the injection cycle time are: reduce the Plastic furniture mould wall thickness of the plastic part/runner size (to shorten the cooling time), reduce the opening and closing distance/thimble stroke, quickly take out the product, manipulator operation, and accelerate the speed of opening/closing the safety door , Reduce the phenomenon of plastic parts sticking to the mold, correctly choose the cooling time, reasonably set the opening/closing speed and the ejector speed/number of times.

"Scrap is the biggest waste." If there is a high defect rate, a large amount of scrap or a return phenomenon in the injection molding production process, the loss of raw materials, electricity, labor, and equipment (excluding other costs) will be very high. Big.

If mold maintenance is not done in place, mold failures will often occur during the production process, and frequent production stops will be required for maintenance. This will affect the smooth production and the stability of the quality of rubber parts, and will cause economic losses to the enterprise (such as mold repairs) Costs, plastic materials/power consumption, labor costs, loss of machine shutdown, etc.)