What is invasive molding?

1, Basic principles of intrusion molding
Intrusion molding, as the name suggests, is a processing technique that involves injecting molten plastic into a mold through a specific method and allowing it to cool and solidify inside the mold, thereby forming plastic products of the desired shape and size. Compared with traditional injection molding, intrusion molding has different injection methods and mold designs, which enables it to overcome some limitations in traditional injection molding, such as insufficient injection volume and complex mold structure.
Specifically, intrusion molding uses a special injection device to inject molten plastic into the mold at a lower pressure and speed. This injection method helps reduce the shear stress and thermal degradation of plastics during the injection process, thereby improving the quality and performance of the product. At the same time, intrusion molding also adopts a more flexible mold design, allowing the mold to adapt to more complex shapes and structures, thereby meeting the market's demand for diversified products.
2, The process flow of intrusion molding
The process flow of intrusion molding mainly includes several steps such as raw material preparation, melt plasticization, injection molding, cooling and solidification, and post-treatment.
Raw material preparation: Select suitable plastic raw materials according to product requirements and carry out pre-treatment, such as drying, mixing, etc.
Melt plasticization: The pre treated plastic raw material is fed into a plastic machine and melted and plasticized through heating and shearing to form a uniform melt.
Injection molding: Molten plastic is injected into a mold at a lower pressure and speed through an injection device that invades the molding machine. During the injection process, it is necessary to control parameters such as injection speed, pressure, and temperature to ensure that the plastic can evenly fill the mold and form a good product.
Cooling solidification: Cooling the injected plastic inside the mold to gradually solidify and form the desired shape and size. The cooling time depends on factors such as the type and thickness of the plastic, as well as the design of the mold.
Post processing: After removing the product from the mold, necessary post-processing such as deburring, trimming, inspection, etc. is carried out to ensure that the product quality meets the requirements.
3, Advantages of invasive molding applications
Intrusion molding technology has multiple advantages, making it widely used in the field of plastic processing.
Improving product quality: Due to the use of lower injection pressure and speed in intrusion molding, the shear stress and thermal degradation of plastics during injection are reduced, thereby improving product quality and performance.
Adapt to complex shapes: The design of intrusion molding molds is more flexible, able to adapt to more complex shapes and structures, and meet the market's demand for diversified products.
Reduce production costs: Intrusion molding technology improves production efficiency and reduces production costs by optimizing injection methods and mold design. Meanwhile, due to the reduction of plastic waste and defect rate, production costs have been further lowered.
Environmental protection and energy conservation: Intrusion molding technology adopts more efficient heating and cooling systems, reducing energy consumption and environmental pollution. At the same time, due to the reduction of plastic waste and recycling costs, it also reflects its environmental and energy-saving characteristics.