Over time, the automotive industry has evolved in leaps and bounds. New technologies have come to play in the production of automotive parts. One technology that every automotive parts manufacturer is embracing is the plastic injection molding technology. The technique is used in the automotive industry in the manufacturing of mechanical components. Some vehicle parts manufactured through polymer injection include panoramic windows and door panels. Others include taillights and safety belt tensioners. This technology has led to the manufacture of high-quality and low-cost plastic parts. In this article, we look at the recent developments in plastic injection technology as well as its benefits.
- What are the new developments in plastic injection molding?
- The injection molding technology that is gas-assisted
This injection molding technique, pressurized gas, assists the melted plastic injection into the mold. The process makes excellent use of Nitrogen gas. The nitrogen gas works by producing a bubble that keeps on expanding. As the bubble expands, it pushes the melted plastic to fill various parts.
In the plastic industry, gas can be injected into the machine through a nozzle. Alternatively, it can be injected directly into the mold’s cavity. However, for the second method, there should be the maintenance of constant pressure or volume.
Molding through foam injection
The foam injection molding technique is one high resistance and rigidity in structural parts. Besides, it is also a highly affordable technique. Structural foam parts have superior thermal isolation. Moreover, they also have more excellent chemical resistance.
Parts from this technique have a foam core between two layers. An inert gas is dissolved in the resin. This gas expands during the injection of the gas-plastic solution in the cavity of the mold. In most cases, this technique is used in the manufacture of vehicle panels. The essence of such parts is that they help in reducing weight.
The thin-wall injection molding
As the name suggests, this technique aims at developing thin-walled sections. A section is considered thin-walled if it has a width under half a millimeter. Nowadays, thin-walled parts are on high demand in the automotive industry.
The multi-component injection molding
This technique is also referred to as injection over-molding. The name emanates from the fact that base material is over-molded by the use of polymer adhesive, either hard or soft.
In this process, more than the material is injected into the same mold simultaneously. The process allows the combination of the materials, which are usually of different textures, colors, and shapes. Multi-component injection molding is used to manufacture complex parts.
- What are the benefits of plastic injection molding?
- It is a very accurate method
Plastic injection is so precise that it can be used to make any plastic part. Although there are design restrictions, molds are made in such a way to allow the precision of the final product. For plastic injection, accuracy is usually within 0.005 inches.
It is a high-speed method
The plastic injection has of late become a popular method among automotive parts manufacturers. The main reason behind this is the less time the process takes. On average, the duration between cycle times is about 15-30 seconds.
The labor cost is meager
Plastic injection molding equipment requires minimal supervision. The machine has an automatic self-gating tool, which helps to streamline operations and keep production ongoing.
It a very resourceful process
Most developers are turning to methods that are environment-friendly and which produce the least waste. Plastic injection is the culmination of these two aspects. The process ensures that only the required plastic is used. Besides, it minimizes waste in that the excess plastic can be ground again and recycled.
It allows for flexibility
Plastic injection molding the manufacturer to change the type of material being used. Moreover, it also provides room for the change in the color of the final product.
It is perfect for creating high-strength materials
When working with plastic injection molding, it is easy to add fillers to components during processing. By adding fillers, the density of the liquid plastic is reduced while the strength of the finished part is enhanced. It is because of this reason that plastic molding is ideal for industries that require durable parts.
It produces a smooth finished appearance
With the plastic injection, finished products need little or no end finishing. The most natural explanation to this is that the final product comes out with the resemblance of a finished product.
In conclusion, plastic injection has become an essential technology in the automotive industry.