Before embarking on any project involving plastics, you need to ask yourself which method will work best: machined or molded.Injection molding creates a solid piece by putting hot melted plastic into a metal mold, and having it drop out after it cools. Fabricated plastic is made from flat sheets in a similar way to machined metal. The plastic parts are cut out of the sheets and then finished through a multi-stage labor process that can involve drilling, bending, additional cutting and gluing. The main differences in these two methods are as follows:
1. Plastic Machining
- Provides precise measurements. This is the preferred method for technical uses in medicine, aerospace, and scientific instruments as parts can be tooled with a high degree of dimensional accuracy.
- Flexibility in design. You can make a design change in machined plastic at any time, but molds need to be made anew for the injection method, which is costly and takes time.
2. Plastic Mold Injection
- Fast and requires little labor. The mold, once made, can be used hundreds of thousands of times for the same exact result. It finishes well and so does not usually require any additional shaping after it comes out of the mold.
- Efficient. No waste created from extra material that must be cut away.
Ultimately machined plastic is far cheaper and is the preferred method if you only need a few hundred parts. Injection molding is expensive and only makes sense if you need a high quantity of parts, typically in the thousands, to justify the overhead cost of having molds made. Visit this website to learn more about the plastic fabrication in San Marcos.