In response to the growing energy demand in emerging markets, electricity prices in Taiwan have been increasing since June 1st. This has led to a surge in interest in energy-efficient injection molding machines, with many manufacturers rushing to introduce such products. Energy-saving technologies like variable-speed pumps and closed-loop systems are now competing in the market, while some companies even include meters with their machines to prove the energy-saving benefits.
Fu Qiangxin, who has established production and sales bases in mainland China, noted that in a market where power conservation is still limited, many manufacturers have introduced injection molding machines equipped with variable-capacity pumps to achieve energy savings. Some press makers even randomly test units, using meters to validate the effectiveness of their energy-saving claims.
Interestingly, variable energy-saving circuit technology was already introduced by the Taiwan Plastic Machinery Factory over fifteen years ago. While it can indeed help reduce energy consumption, the so-called "energy saving" often comes with limitations and additional costs. It's crucial for buyers to carefully evaluate these options before making a decision.
After all, there’s no such thing as a free lunch. If manufacturers believe they can gain significant benefits with minimal investment, they risk falling into an irrational trap. Below is a list of key considerations when selecting energy-saving injection molding machines, aimed at helping manufacturers make informed decisions based on rational evaluation.
Is a variable pump the only option for energy savings? Many believe so, but in reality, there are several energy-saving solutions available. These include specialized oil circuit designs, oil-and-electric composite systems (such as electric servo screw drives), fully servo-controlled (all-electric) machines, dual-pump configurations, inverter motors, and more. Variable pumps are just one of many options. Manufacturers should compare different technologies and choose the one that best suits their specific needs and operational goals.
Does installing a variable machine guarantee significant energy savings? The principle behind variable pumps is to adjust flow based on demand, thus reducing energy use. However, this efficiency is most noticeable in products requiring long periods of high-pressure maintenance. For general or thin-walled products, especially during high-speed production, the energy-saving effect may be minimal. This is a well-known fact among industry experts, yet many manufacturers overlook it due to a lack of understanding. As a result, they may fall into the misconception that all products will benefit from variable machines.
Therefore, when considering whether to adopt energy-saving machines, it’s essential to determine if your product requires high holding pressure. If you're producing standard or thin-walled items, using a variable machine may not deliver meaningful energy savings. It’s important to assess your production needs carefully before making any investment.
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