When comes to the products to injection molding, there is no 100% correct answer for this question? But to special client, the 100% correct answer is there. For example, when a medical product making company, when the buy the injection molding machine, the first point they are thinking is the machine must be as clean as possible, since they have to put the machine into dust-free workshop. So, the electrical injection molding machine is the first choice.
Here lists the advantage and disadvantage of each type.
Electrical injection molding machine: the first advantage of it is clean, during production, there is no chance to get any oil leakage, since it does not have the hydraulic system; the second advantage is precise, very suitable to injection molding the micro precise parts. The disadvantage of it is the price is very expensive. So, it is not suitable for injection molding very large plastic products.
Hydraulic injection molding machine: it is the most popular injection molding machine in the market. Because the price of it is much cheaper comparing with electrical machine. No matter as small as less than 15-ton machine, or as big as 6000ton machine, all available in the market. It is hard to find the disadvantage of it, the only thing is the client need to change the hydraulic oil in 1-2 years for machine good performance.
Hybrid machine. Normally the hybrid machine is with hydraulic clamping unit and electric injection unit. It’s a middle category between hydraulic and electric machine. The price and performance are also between them. The hybrid machine has the precise advantage, and also balance its price.
The machine tonnage
When you plan to buy an injection molding machine, the first question come to you may be “How much do plastic injection molding machines cost?”. For answer this question, you need to ask the answer to another question “What size injection molding machine do I need?”. So, it comes to the key point, the injection molding machine tonnage. “What is machine tonnage?” and “What is meaning of ton in injection moulding machine?”
The injection molding machine size is mainly based on the machine clamping force tonnage. Take the hydraulic injection molding machine for example, the small injection molding machine is with small motor, so it gives small clamping force upon the mould, accordingly the injection unit could not be big, otherwise the mould will be get apart during injection. For sure, the small injection molding machine could not work big mould for molding big plastic parts. So, when you buy injection molding machine, you need to choose the suitable tonnage machine.
Then another question comes:“How do you calculate injection mold tonnage?” or “How is tonnage calculated?”