There are two processing technologies for mold products – injection molding and blow molding. Each has its characteristics. In brief, blow molding molds employ the “injection + blowing” method. Injection molding molds adopt the “injection + compression” method. Injection molding has a solid core. Blow molding results in a hollow core. Injection molds have a gate cross-section. The surface of the blow molding molds and the air blowing vents are uneven. In the end, is it better to use an injection mold or a blow molding mold?
I. Injection Mold
Injection molding is a process that involves injecting materials. That is, plastic materials are melted and then injected into the mold cavity. After the plastic enters the mold, it cools and is processed into the required shape. The formed shape is the appearance of the finished product, and no other processing is required. In addition, the injection molding process allows for precise control of details. During the injection molding process, protrusions, ribs, threads, and other parts can be formed in one step.
II. Blow Mold
Blow molding is a relatively rapidly developing plastic processing method, also known as hollow blow molding. Its processing principle is: put the thermoplastic resin or tubular plastic blank obtained by injection molding into the mold, and then inject compressed air into the mold after the mold is closed to inflate the plastic blank and approach the inner wall of the mold, and then obtain the required hollow product through cooling and demolding. It is worth mentioning that, very similar to the blow molding of hollow products, the manufacturing process of blow molding film does not use molds in principle, which is entirely different from the processing of injection molding. According to the blank production method, blow molding can be divided into extrusion blow molding and injection blow molding. The new development direction is multi-layer blow molding and stretch blow molding.
III. The Difference between Blow Mold and Injection Mold
The primary difference between injection molds and blow molds lies in their product manifestation. Products manufactured by the injection molding process are usually relatively thick, relatively simple to manufacture, and have relatively low requirements for raw materials. The blow molding process is different. The product is thin and transparent. Because of this, there are requirements for the toughness and tensile properties of raw materials, and the processing requirements of blow molds are also relatively high.
Injection molds and blow molds are widely used in daily life, and both of them have their advantages and characteristics; the development prospects are good.
The above is the introduction shared by the editor about the difference between injection molds and blow molds. So, do you know what the most crucial difference between the two is? Yes, it is the product manifestation. For more information, please consult Dongguan Worldbound Plastics’ independent website:https://www.worldboundgroup.com/. Dongguan Worldbound Plastic Products Co., Ltd. is a manufacturer that can provide a complete set of solutions from product design, precision mold manufacturing, injection molding, assembly, and after-sales service.
