Sporting goods, such as balls, bats, coolers, lantern & stove kits, boat fenders and decoys ![]() ![]() Continuous extrusion blow moldingĪutomotive air ducts, fluid reservoirs, and filter housings Here’s a breakdown of the types of products that can be created with each. The two most popular forms of extrusion blow molding are continuous extrusion blow molding and intermittent extrusion blow molding. Extrusion blow moldingĮxtrusion blow molding allows the molder to make the most complex product shapes. Though this provides an economic advantage, it is counterbalanced by the fact that stretch blow molding machinery is relatively expensive. Stretch blow molding allows you to make the same bottle using less material than in regular injection blow molding. The core rod stops lengthening near the opposite wall of the mold. The core rod increases the length of the pre-form as air is forced into it so that the product lengthens and widens at the same time to fill the mold cavity. In the stretch blow molding variation of injection blow molding, the pre-form is both blown and stretched. Two-liter soda bottles are one of the most common stretch blow molded products. Stretch blow molding is a variation of injection blow molding, which is also primarily used to make clear PET bottles. However, you can’t use injection blow molding to make more complicated items, such as complex bottle shapes with handles, most consumer goods, or industrial parts. On the plus side, it’s ideal for making very precise bottlenecks, thanks to the core rod used in the injection portion of the process. This method has both advantages and drawbacks. The largest market currently uses the material polyethylene terephthalate (PET). The injection molded pre-forms are moved (sometimes over long distances) to the blow molding machine where they are reheated, placed into the blow molds, and blown into the finished shape of the bottle. The pre-form typically looks like a test tube, with the thread detail that will be used on the finished bottle neck molded into the open end of the tube. ![]() The first step is to injection mold a plastic pre-form. The method is actually two processes combined. Injection blow molding is normally used to make bottles in large quantities. Here is an introduction to the different types of blow molding to help you decide, along with a list of industry-specific words you may encounter as you create your product. Your product needs and specifications will determine which type of blow molding is best for you. There are several types of blow molding processes.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |