What are the key points of plastic gear mold design?
Plastic gears have the characteristics of lighter weight, low price, and low transmission noise, and are widely used in various industries, such as automobiles, electronic instruments, and household appliances. On many occasions, plastic gear has gradually replaced metal gears, bring more possibilities for gear transmission.
In the production of plastic gears, how to ensure the precision of gear has always been one of the issues in the mold design stage. Based on our experience, we have summarized some suggestions on how to improve the accuracy of gear processing and how to process gear products that meet the industry standards.
1. The design of mold gating system
Mold flow analysis software is a professional CAE software with powerful analysis functions, and it is widely used for optimization analysis in the injection mold industry. In the design stage, we can use mold flow software to choose the best gate position for the mold. If you choose a sub gate in the mold structure, the gate size should be small, otherwise, it will be difficult to break, and it will be easy to cause condensation problems.
2. Mold structure design
On the design of the mold structure, we should have an accurate table of the physical properties, and we should apply the shrinkage rate of the raw material in the design of the mold cavity to ensure the precise size of the gear product.
3. Verification of gear products
There are generally two methods for the verification of gear products. One is that the customer or mold supplier has professional testing equipment for gear products to test the plastic gear and obtain the products with the right size. The other is to put the gear product on the mechanism to check whether the transmission state of the product is qualified.
A gear product requires high precision, and various factors need to be fully considered in the mold design and processing stage to ensure that the mold design is reasonable. At the same time, in terms of gear verification, it is best to have professional equipment for better confirmation.
