Plastics and metals have very different physical properties and endurance. When designing plastic parts, you should know the following suggestions. Dingyue is committed to providing high-grade mold manufacturing and injection molding solutions, and providing thermoplastic injection molding of various engineering-grade materials. With a strong quality inspection department and strict quality control, all project and product data are recorded and traced in our system.
When designing components made of rigid materials, we should understand that rigid plastics are more brittle than metals. Therefore, adding a larger radius to the inner angle will help spread the load and help minimize damage.
Although compression molding and thermosetting materials are used, we don't have to care about different cross sections. Most people are familiar with thermoplastic injection molding. When manufacturing these parts, it is important to maintain a relatively thin and uniform wall thickness. Injection molding of plastics is a thermal process. Once molded, the material begins to cool and shrink. Because the injection molded parts are cooled from outside to inside. If the wall is too thick, the outer skin will harden, but the internal mass of the part will continue to cool and shrink. This leads to surface deformation called "sinking". Thin walls promote uniform cooling and minimize deformation (warping and sinking) and help you make good parts for the first time.
Another consideration in the design of elastic parts is that they cannot maintain the same level of tolerance as metals can. Most metal parts can be manufactured to a high level of precision, and strict tolerances of elastomers can be achieved. Elastomers, whether rigid or soft, have greater thermal expansion and contraction than metals. This greatly affects the achievable tolerance level of finished products. If the assembly requires stricter tolerances, the filling material tends to be more stable in size. Because many elastomers are hygroscopic, they will absorb or dissipate water. This will cause them to grow or shrink according to the humidity level in the atmosphere.
These factors will be taken into account when choosing the right materials and design for any product. To ensure the size and physical requirements.
