What methods can be used to reduce injection molding time?

In this increasingly competitive business world, improving production efficiency can often help us turn defeat into victory in the competition. Use the shortest time to complete more things. This is the root of improving efficiency. This article explains various ways to improve the injection molding cycle using existing or newly designed injection molding machines or molds. Reduce the injection molding time while determining the amount of energy.

Generally speaking, the injection cycle of a hydraulically driven injection molding machine refers to the period from mold closing to the next mold closing. Mold closing is generally divided into four stages: fast mold closing, slow mold closing, low-pressure mold protection and high-pressure mold locking, four types of mold operations. For the recently designed toggle-type injection molding machines, there are regenerative mold closing oil circuits to achieve higher mold closing speeds. Under the premise that the mold is not subject to high impact, it is suitable for use.

Using the lowest clamping force that does not produce burrs on the finished product can shorten the time required for the high-pressure clamping stage. Moreover, the mold, the tie rod, the toggle and the template of the injection molding machine will also extend their life by using a low clamping force. Prolonging life is a priority. If a mold is sufficient with a clamping force of 50 tons, there is no need to use a clamping force of 51 tons, even if your injection molding machine has a higher clamping force.

I have heard that the mold is basically a heat exchanger. Yes, the mold continuously removes the heat of the melt through the cold water channel. A properly designed mold can improve the efficiency of heat exchange. In the case of high efficiency, however, ice water cooling can shorten the "cooling time" if allowed. If ice water cooling causes condensation in the mold, the dry fan and sealed clamping device can reduce the dew point and prevent condensation.

Open the mold at the highest speed without tearing the finished product and making a loud mold opening noise. Some sophisticated injection molding machines have a decompression device before mold opening, which will not produce noise even at high-speed mold opening. Therefore, the loud noise should be smaller than the small noise. In order to achieve accurate mold stop position at high-speed mold opening, a brake valve or closed-loop control can be used.

Ejection. On small injection molding machines with low ejection force, pneumatic ejection can be used, which is faster than hydraulic ejection. Electric ejection is faster than pneumatic ejection. The mold can be designed to be ejected by the mold opening action instead of using the ejection device on the injection molding machine. However, this method can only eject once. This is the simplest method of ejecting while opening the mold. Ejection driven by the module is also quite fast.

Ejector retraction. For some finished products, multiple ejections can be performed by the vibration ejector of the injection molding machine. The ejector does not need to be fully retracted each time to shorten the time of multiple ejections. The ejection time needs to be controlled. The last ejection can be started at the same time as the mold closing. Since the ejector has a shorter stroke than the mold plate, the ejector will always be fully retracted before the mold is closed.

This is one way of doing things. The cost of an injection molding machine with three independent oil circuits is relatively high. In two parallel-action injection molding machines, the clamping device generally uses one oil circuit and the injection device uses another oil circuit. The two oil circuits are classified to perform their own functions. This is based on the consideration that injection molding machines are generally divided into the clamping device oil circuit board and the injection device oil circuit board.

Hybrid hydraulic injection molding machines combine the advantages of two types of drives and work ingeniously together. The general design is electric feeding combined with other hydraulic actions, such as Husky's Hyelectric injection molding machine. Another powerful feature is dual-pump injection. The dual-pump design uses only one oil pump during injection. The oil circuit can be slightly modified to allow dual pumps to be used simultaneously during injection, thereby increasing the injection speed by nearly double.

If you want to really reduce the time of injection molding, I think the most important thing is to improve the production efficiency of injection molding. For example: how many customers have been solved in a unit of time, and how much time has been added to each business when solving customer problems. This is a very troublesome thing, but it is also something that we have to face.