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Multi Cavity Plastic Mold
YIHITECH is the expert for manufacturing Multi cavity plastic mold with high precision equipment. you can use either a single or a multi-cavity plastic mould please contact us, YIHITECH is free to give you best choice according to your project. What is the difference between the single cavity plastic mould and multi cavity plastic mold? The simple summary you can refer to as below.
What is the difference between single-cavity and multi-cavity plastic mold.
A single-cavity plastic mould produces a just single product per shot, a multi-cavity mould produces more than one products per shot. From the cost point view, multi cavity plastic mold is much more competitive than single cavity plastic mold. For sure, this depends on your project complexity. how are you going to determine your project with a single or a multi-cavity mould, that depends on the number of products you want to produce within a certain timeframe, and the cost budgets. If your product need a cycle time of one minute, you will never be able to produce one million products a year with a single cavity plastic mould by injection molding. After all, there are only 525.600 minutes in a year. On top of that, it takes time to optimally set up the injection moulding process. We also need time to conduct preventative maintenance to the mould just like a car that need to be mainten periodically. If your goal is to produce a million products per year, multi cavity plastic mould is the right direction.All our new molds design with a shot guarantee. It guarantees the minimal shots that tooling operate times of the mould without costs for the customer. A single-cavity mould usually comes with a shot guarantee of 500K or one million shots, depending on the material, product design and tolerances. If you want to produce more products with the same mould, it is advisable to opt for a multi-cavity plastic mold. For example, a four-cavity mould is capable of manufacturing four million products within the shot guarantee life.
What’s the Difference Between Multi-Cavity Mold And Family Mold?
A multi-cavity plastic mold has multiple cavities of the same part,a family mold produces a several different part at one shot. For instance, for an electronic enclosure, you may need a front, back, battery door, and a button. Those could all be molded at once in a family mold. If you have big volume parts, you may consider multi cavity mold that can produce many piece in one shot.
How to determine the Number of Cavity in a Mold?
Multi-cavity molds produced parts in a much higher efficiency way, it’s employed frequently on the occasion when the demands volume is high, the number of the cavities and mold construction depend on both economy and technical factors, quantity of parts to be molded at one cycle, required cycle time, and unit price are related with mold making cost. here below factors that need to be considered to achieve the best result of the project. When we decide the numbers of cavity.
Delivery Time
The more numbers of cavities, the longer manufacturing time. When the required mold delivery time is short, reducing the mold cavity number with the customer’s approval can be used to shorten the mold manufacturing time.
Quality and tolerance
As the numbers of cavity increase, the tolerance of the molded parts reduce if the same manufacturing process employed, it would also much more difficult to ensure tolerance during molding process, it’s also not as easy as single cavity molds while modification required.
Part Layout and melt flow
To have quality parts, Multi-cavity mold need to have an balanced runner layout, the melt flow much fill all the cavities equivalent under same injection pressure, especially for the raw materials with bad melt flow performance, such as PC, it’s easy to have some cavities are fulfilled or even overfilled with flash created while others are not.
Injection machine capacity
The injection molding machine is part of the cost of injection molded parts, so usually the mold is required to be manufactured at a predetermined injection molding machine, the size of the mold have to be considered during design process, the designed mold not allowed to be too large or too small, the injection molding machine also have certain amount of maximum injection volume, the total volume of all cavities plus runners should not be exceed 80% of it.
Pros of a multi-cavity plastic mould
鈥?The desired number of products will be finished sooner because of the shorter lead time per batch.
鈥?You can produce more products with the same mould within the shot guarantee.
鈥?A four-cavity plastic mold has, in most cases, a lower total cost of ownership (TCO) than four single-cavity plastic mold.
鈥?More efficient use of the cycle time.
鈥?Major scale benefits for stable processes.
鈥?Lower part price.
Cons of a multi-cavity mould
鈥?One multi-cavity mould requires a more substantial investment than one single-cavity mould;
鈥?A longer lead time for the mould manufacturer.
鈥?If there are any problems with one of the cavities, the entire mould will have to be taken out of the machine, which means the other cavities cannot be used either.
鈥?When using an automated process to operate a mould with a large number of cavities (thirty-two or more), each cavity will have to be absolutely perfect.
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website:http://www.yi-hitech.com/tooling-design-and-manufacturing/