What are the main factors to consider in mold design


1. The mold design should give the material strength a […]

1. The mold design should give the material strength a sufficient insurance factor, because the cost of modifying the mold and trial mold due to material problems is far greater than the material cost.
2. Mold cooling water channels should be as many as possible, and balanced and reasonable, especially for large and thick products. More design and processing of waterways seems to increase the cost. If the product molding cycle can be reduced by 3-5 seconds, will it better reflect the value of the mold?
3. Don’t make inserts less because of reducing processing costs. In difficult-to-process areas, make inserts as much as possible at the end of the product's partial flow, and make enough exhaust grooves on the inserts. Doing more inserts seems to increase the cost. In fact, it will reduce a lot of molding risks. The amount of mold core processing is small, and the inserts can be processed synchronously, shortening the mold processing cycle; the inserts are beneficial to exhaust, shorten the filling time, reduce the molding pressure, and reduce various product defects caused by trapped air problem.

4. The mold design should be designed to exhaust as much as possible, and the exhaust should be designed reasonably and processed; many small and medium-sized mold companies do not design the exhaust groove in the mold design, and the on-site fitter should deal with it based on experience. This is very wrong. The design and processing of exhaust gas seems to be a waste of cost. The exhaust problem is a very important factor that causes product problems. The benefits of exhaust are not explained in detail here.
5. In order to reduce the number of joints in the cooling water circuit design, it is an extremely wrong idea to connect many water circuits in series. Some on-site injection molding personnel directly connect multiple waterways in series for convenience. If the cooling water flows in the mold for too long, the water temperature will rise, and the temperature of the inlet and outlet water will be significantly different, which will affect the cooling effect of the product, and may even cause the product to be deformed due to uneven cooling.
6. The ejection design of the mold should be sufficient, rather than surplus. Don't save the ejector pins to cause product ejection, ejection imbalance, product ejection deformation, etc. The loss caused by a modification of the mold trial is far greater than a few ejection pins.

In short, mold design must fully consider the cost of subsequent modification of the mold and injection molding production. The mold is for injection molding, and the overall cost must be considered. Some companies only make molds and sell molds to customers for injection molding. In order to control mold costs, they ignore injection molding production. In the long run, these mold factories will be abandoned by customers, even if your mold prices are low, and no quality is scrap iron. Only by fully considering injection molding production is a good mold.