One of the most unique types of injection molds are theunscrewing molds. They are part of everyday use, which may cause you to think that you won’t need to spend much time considering the required design. To demonstrate the wide use of this particular mold type, the following is short list of the types of products that use unscrewing molds in the design:
- Bottle and milk caps
- Condition and shampoo lids
- Prescription medication bottles
- Medical supplies
- Sprinkler and shower heads
- Screws, nuts, and bolts
When you need one of these types of plastic molds, there are several things you have to determine to make sure you get the right fit for your product and budget.
Volume
The volume of the product will probably determine many different aspects of the final product, including the thread count, the size of the part, and the type of material that will be used during production. While other factors are important, the design of the various unscrewing molds is more complex and costly than many of the other types of molds.
The Threads
The number of threads is going to vary based on the final product. Water bottles do not require a high thread count because they are relatively light and should be easily removed. If the unscrewing mold is for a plastic part under the hood of a car, it needs to have a higher thread count to be more durable. The number of threads required plays a large role in the final cost of production, so it needs to be tested to ensure it meets the needs of the final product.
Ease of Removal
The ease by which an unscrewing mold should be removed from the final product is an important factor to consider in the design. Water bottles have only a few threads, sometimes only two or three, because they need to be easy to remove. To ensure that the tops do not fall off easily, the threads are spaced out a bit more. An unscrewing mold on a medical device will likely need a lot of threads that are evenly spaced and very difficult to pull off of the device. The material required for these two vastly different uses is affected by how easily the part should be to remove from the product.
Topics: Injection Mold Design