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. It actually includes the following parts:

Molding cycle: The molding cycle directly affects labor productivity and equipment utilization. Therefore, in the production process, the relevant time in the molding cycle should be shortened as much as possible on the premise of ensuring the quality. In the whole molding cycle, injection time and cooling time are the most important, which have a decisive impact on the quality of products.

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. The pressure holding time in the injection time is the pressure time for the plastic in the mold cavity, which accounts for a large proportion in the entire injection time, generally about 20-120 seconds (up to 5-10 minutes for extra thick parts).

Before the melt at the gate is frozen, the holding time has an impact on the dimensional accuracy of the product. If it is later, it has no impact. The holding time also has the most favorable value. It is known that it depends on the material temperature, mold temperature, and the size of the sprue and gate. If the dimensions of the sprue and gate and the process conditions are normal, the pressure value with the lowest fluctuation range of the shrinkage of the product is usually taken as the criterion.

Multi-Cavities Molds

The cooling time mainly depends on the thickness of the product, the thermal and crystalline properties of the plastic, and the mold temperature. The end point of cooling time shall be based on the principle of ensuring that the products will not be changed during demoulding. The cooling time is generally about 30~120 seconds. It is unnecessary to have too long cooling time, which will not only reduce production efficiency, but also cause difficulty in demoulding for complex parts, and even produce demoulding stress when forced demoulding. Other times in the molding cycle are related to whether the production process is continuous and automatic, and the degree of continuity and automation.

Eight Common Injection Mold Structure Classification

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Eight common injection mold structure classification One. Single parting surface injection mold When the mold is opened, the movable mold and the fixed mold are separated, so as to take out the plastic parts, which is called single parting surface mold, also called double-plate mold. It is the simplest and most basic form of injection mold, which can be designed as single-cavity injection mold or multi-cavity injection mold according to the need, and is the

Injection Mold Manufacturing Process And The Basic Processing Process Analysis

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Injection mold manufacturing process and the basic processing process analysis The injection mold manufacturing process mainly includes. Acceptance of the task. Mold design. Mold manufacturing. Mold inspection and mold trial. Mold modification and repair. Mold maintenance. I. Acceptance of tasks Plastic mold making, first of all, the customer engineers provide product drawings to the mold manufacturer, the manufacturer through the molding plastic production task requirements, the process of collecting, analyzing, digesting product data, this is

The Difference Between Injection Moulds And Plastic Moulds

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The difference between injection moulds and plastic moulds Many people can’t tell the difference between injection molds and plastic molds, and many people even think that they are the same kind of molds, just called different. Although injection molds and plastic molds are both molds, but there is a difference between them. Want to figure out the difference between the two, first and Xiaobian together to understand what is injection mold, what is plastic mold.