O que é moldagem por injeção? Um guia completo

What is injection molding? A complete guide

What is injection molding? A complete guide

Injection molding, also known as injection molding, is a manufacturing method that involves injecting molten material into a mold to produce various products.

The advantages of injection molding include fast production speed, high efficiency, automation of operations, ability to produce a wide range of designs and colors, as well as simple to complex shapes, small to large sizes, and precise product sizes. It also allows for easy product updates and the production of complex formats.

Training cycle

The duration required to complete an injection molding process is called the molding cycle, also known as the molding process. The molding cycle includes the following components:

Molding cycle: The molding cycle has a direct influence on labor productivity and equipment use. Therefore, during the production process, the relevant time in the molding cycle must be reduced as much as possible while ensuring product quality.

Within the complete molding cycle, injection time and cooling time are the most crucial factors that significantly affect product quality.

The plastic raw materials used in the injection molding process are varied, and the types and shapes of mold design are also diverse. Additionally, the operator's familiarity with specific injection molding machines, the worker's operating skills and hands-on experience, and the objective environment (such as ambient temperature, humidity, and air cleanliness) may vary depending on the seasons.

These objective and subjective conditions collectively determine the occurrence of defects in injection molded products.

In general, there are three aspects that are used to evaluate the performance of plastic products. These are:

  • Appearance quality, which includes integrity, color and gloss.
  • Accuracy between size and relative position, which refers to size accuracy and position accuracy.
  • Mechanical, chemical and electrical properties that correspond to the use of the product, known as functionality.

Therefore, any problem in any of these three aspects could lead to the production and expansion of product defects.

Common defects of injection molded products can be classified into the following categories:

  • Appearance defects such as cracks, discoloration and welding marks.
  • Process issues including flash, shrinkage and missing glue.
  • Performance issues such as warping and embrittlement.

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