Kaisijin introduces the injection molding cycle to you

2023-05-15

What is the Injection Molding cycle? The time required to complete an injection molding process is called the molding cycle, also known as the molding cycle. Today, Kaisijin has compiled relevant materials to introduce the injection molding cycle for you. Let's take a look together.

Forming cycle: The forming cycle directly affects labor productivity and equipment utilization. Therefore, in the production process, it is necessary to shorten the relevant time in the forming cycle as much as possible while ensuring quality. Throughout the entire molding cycle, injection time and cooling time are crucial as they have a significant impact on the quality of the product. The filling time in the injection time is directly inversely proportional to the filling rate, and the filling time in production is generally about 3-5 seconds.

Kaisijin introduces the injection molding cycle to you

The pressure holding time in the injection time is the pressure time on the plastic inside the Mold cavity, which accounts for a large proportion of the entire injection time, usually about 20-120 seconds (thick parts can be as high as 5-10 minutes). The amount of holding time before the melting and freezing of the material at the gate has an impact on the accuracy of the product size, but it has no effect in the future. The holding time also has a significant value, as it is known to depend on material temperature, mold temperature, and the size of the main runner and gate.

If the dimensions and process conditions of the main runner and gate are normal, the pressure value with a small fluctuation range of product shrinkage is usually used as the standard. The cooling time mainly depends on the thickness of the product, the thermal and crystallization properties of the plastic, as well as the mold temperature. The end point of the cooling time should be based on the principle of ensuring that there is no change during product demolding. The cooling time is generally between 30 to 120 seconds. Excessive cooling time is unnecessary, which not only reduces production efficiency, but also causes difficulty in demolding complex parts. Forced demolding may even generate demolding stress. The other times in the forming cycle are related to whether the production process is continuous and automated, as well as the degree of continuity and automation.

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