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What are In-mold Injection Molding and Regular Injection Molding?

In mold injection molding and ordinary injection molding are both important process methods for plastic product molding, and there are significant differences between the two in terms of definition, process, characteristics, and applications. The following is a detailed analysis of these two injection molding processes:

1,In-mold injection

Definition: In mold injection molding, also known as in mold decoration technology (IMD/IML), is a manufacturing technology that combines decorative films with injection molding. This technology embeds decorative films into the surface of plastic products during the injection molding process, achieving a high-quality appearance effect while endowing the product with excellent wear resistance, scratch resistance, chemical corrosion resistance, and other properties.

technological process:

Prepare decorative film: usually by shaping the printed film.

Film placement: Insert the formed film into the injection mold cavity.

Combined injection molding: After the mold is closed, molten plastic is injected into the mold through an injection molding machine, and the plastic is combined with the ink layer on the back of the film.

Cooling solidification: Molten plastic is cooled and solidified to form a product that conforms to the shape of the mold.

Take out the product: Open the mold and take out the molded plastic product with decorative effect.

characteristic:

High precision: Due to the embedded decorative film in the mold and the precise control of the injection molding process by the mold, the product has high precision.

High quality: The product surface has excellent wear resistance, scratch resistance, chemical corrosion resistance and other properties, and the decorative effect is long-lasting.

High complexity: The process is relatively complex and requires more precise equipment and technical control.

High cost: Due to the complexity of the process and equipment requirements, the production cost is relatively high.

Application:

In mold injection molding is widely used in fields such as automotive interiors, household appliances, and electronic products. Such as car dashboards, control panels, casings and panels of household appliances, as well as casings and labels of electronic products such as mobile phones and cameras.

2,Ordinary injection molding

Definition: Ordinary injection molding is a process method in which heated and melted plastic raw materials are injected into a mold through the feeding port of an injection molding machine to form a mold.

technological process:

Heating and melting: Heating plastic particles to their melting point to transform them into a flowing molten state.

Injection mold: Molten plastic is injected into a pre-set mold through the high pressure of an injection molding machine.

Cooling solidification: Molten plastic is cooled and solidified in a mold to form a product that conforms to the shape of the mold.

Remove the product: After the mold cools down, open it and take out the formed plastic product.

characteristic:

Simple process: The technology is relatively simple, easy to operate and control.

High production efficiency: It can achieve automated production and improve production efficiency.

Low cost: Compared to in mold injection molding, the production cost is lower.

Accuracy and quality are affected by the environment: Due to the flow rate of plastic materials, the temperature and pressure of the mold being easily affected by the external environment, the accuracy and quality of molded products may be relatively low.

Application:

Ordinary injection molding is widely used in daily necessities, toys, packaging materials and other fields. Such as plastic cups, plastic pots, plastic toys, etc.