How to shorten the injection molding production cycle and set the right cycle time

For any injection molding plant, the direct way to increase production is to shorten the injection molding production cycle. Under the premise of guaranteeing the quality of products, the shorter the injection molding production cycle, the more products will be produced. So, what is the concept of injection molding production cycle? How to set the right injection molding machine injection molding cycle?

What is the concept of injection molding production cycle?

The injection molding production cycle, also called the injection molding cycle, is the time required to produce an injection molded product. Generally speaking, the injection molding production cycle consists of three parts: injection time (including mold filling and pressure holding), in-mold cooling time, mold opening time and mold closing time. Expressed by the formula as follows:

Molding cycle = injection time + in-mold cooling time + mold opening time + mold closing time

How to set up a suitable injection molding production cycle?

If the fully automatic injection molding machine that relies on the robot to take parts, there is no human factor to open the safety gate and close the safety gate, it is controlled by the time setting, which can be used to ensure that the moving template in the small inertia impact and protection of personal and mold safety conditions, you can try to minimize the short time setting; non-full-automatic injection molding machine type, then in the opening and closing of the mold can be strengthened in terms of the operator's training, guidance and supervision, requiring that the operator in the When the time arrives, the safety door should be quickly knocked open or closed, and try to make each stay for an equal amount of time, otherwise, the accumulated time error will also affect the thermal history of the plastic.

Injection time, injection pressure and screw metering time should be based on the nature of the polymer, products and molds, it is related to the injection pressure, injection rate, screw rotation, back pressure, temperature and many other factors, should be guaranteed under the premise of quality to seek a stable time. The number of screw rotation and back pressure directly affects the metering time of the screw, and the use of special screws will reduce the program time.

In terms of cooling time, the setting of cooling time should take into account the nature of the polymer, the product and the temperature and other conditions, and the actual cooling time of the product is included in the injection holding pressure and screw metering time, so that the injection molding process can be completed within the required cooling time of the product.