CavityMold Blog

When industries need intricate parts, they turn to custom injection molding services. Custom injection molding works best where you need large volumes of parts.  Before we dive into custom injection molding, let’s look at injection molding at large. Injection molding involves the use of molds to create parts from plastic materials. The plastic materials are usually melted first while adding fillers or colors. Then you inject the resulting fluid into the mold cavity at high pressure. Several factors affect injection molding: Temperature Pressure Melting point Fillers used  Injection molding offers several advantages quality surfacing being one of them. Molds made

Injection molding is pretty much standard for manufacturing consumer products. Especially those with complex designs and/or required in large quantities. The method is well established for conventional materials like plastics and metals. But what about those materials that are not quite conventional? In this article, we take a look at thermoplastic elastomers (TPEs). Many products that once used either plastics or rubber are today made with TPE. These special groups of plastics work well for injection molding. They may even prove superior in some aspects of the process.  The general principles of injection molding hold regardless of material. These are

Polymers are a very diverse group of compounds. They are also ubiquitous. They exist in nature and are also synthesized by man. Polymers exist in food, drugs, textiles, electronics, and medicine. Examples are proteins, cellulose, polyethylene, nylon, and polystyrene. All polymers have a common characteristic of a repeating unit within their structure. Let’s take for example polyethylene. Plastic used in products like shopping bags and bottle caps. It is a polymer made up of repeating units of ethylene. Ethylene reacts with thousands of other ethylene molecules to form one polyethylene molecule. These ethylene molecules that form the repeating units are

Plastics have become one of the most important materials of the modern age. They cut across several industries. Shopping bags, coffee cups, food bowls, and water bottles are examples of plastic products many of us use daily. It is difficult to imagine modern living without plastics. What makes plastics so great? After all, glass and metals are also very useful materials that have been around for longer. They are also still used today in many products. The answer partly lies in properties unique to plastics. Plastics are lightweight and non-brittle, unlike the alternative materials. They also do not rust, unlike

Believe it or not, plastic injection molding is very old. The first injection mold machine was made by two brothers in the 19th century. With advancements in technology, we have made the art of injection molding better. We now have small machines that can fit on our tabletops. Plastic injection involves placing molten plastic material in a mold cavity. The process of injecting needs high pressure to make parts and prototypes. The high pressure forces the molten material to all corners of the mold cavity. These molds may be made of hardened steel or aluminum. The disadvantage of plastic injection

Injection Molding of Polyethylene Thermoplastics have been one of the most significant materials in the industrialized world. These materials have had a pronounced impact on modern industry and modern living. Polyethylene is a very important type of thermoplastic. Plastics are polymers that are rigid at their service temperature. They have limited elasticity. They will continue to stretch beyond their yield point until breakage. This stretching is irreversible beyond the yield point. They are unlike rubbers which have very high flexibility at their service temperature. Plastics can be either thermoset or thermoplastic. Thermoset materials need a chemical reaction to go from

Introduction to Injection Molding Injection molding is one of the most significant processes in the industry. It allows for the production of complex structures with good precision and reproducibility. Its application extends to microelectronics, biomedical, automotive, and aerospace amongst others. The desirable property of materials like metals and plastics is how they form. When cooled they keep the new structures into which they have formed. Injection molding is also applied to thermoset materials. These are materials that do not melt upon heating. Instead, they go from viscous liquid to a solid-state through the process of crosslinking. Materials such as metals,

What is flash? Flash refers to the defect of where excessive material found in the parting position of the mold, especially at the parting surface, movable core, exhaust hole, or exhaust ejector pin. Flash cause reason. Low clamping force.If the clamping force of the injection molding machine is too weak to fix the templates together during the molding process, the flash will occur. Clearance in the mold.If the mold structure is deformed, the parting surface is defective, the machine and the mold are improperly set, and there are flying edges or foreign bodies glued to the parting surface, the flying