Analysis of The Causes of Damage to The Oil Pump of The Injection Molding Machine

Analysis of The Causes of Damage to The Oil Pump of The Injection Molding Machine (2)


Welcome to the fascinating world of injection molding machines! Today, we’ll delve into the intricate world of oil pumps and their frequent bouts of damage. Trust me, it’s a real thriller. Think of it as a superhero movie, minus the thrilling action and cool costumes. But hey, there’s still a lot to uncover. The secret to understanding the causes of damage to the oil pump lies in grasping its purpose and components. We’ll explore the functions of the oil pump and its various components. Beware, this world is not for the faint-hearted, only the bravest will dare to enter. So, put on your intellectual goggles, and let’s dive in! Who knew oil pumps could be so intriguing? Just kidding, no one really thinks that. But hey, we’re content marketers, and we make even the dullest topics sound fascinating. Let’s get this show on the road!

Understanding the Oil Pump

Ah, the oil pump. The unsung hero of the injection molding machine. Without it, the world of plastic manufacturing would be in shambles. Well, maybe not shambles, but certainly not as smooth and efficient as it is today. So, let’s take a moment to appreciate this small yet mighty component of the machine.

Function of the oil pump:

The oil pump is responsible for, you guessed it, pumping oil. But it’s not just any oil; it’s the lifeblood of the machine. This oil ensures that all the moving parts are well-lubricated, preventing unnecessary friction and wear. Think of it as the machine’s personal massage therapist, keeping everything running smoothly. Without the oil pump doing its job, the injection molding machine could throw a hissy fit and malfunction, causing a whole lot of headaches for everyone involved.

Components of the oil pump:

Now, let’s dive into the juicy details of what makes up this vital component. The oil pump consists of various parts that work together harmoniously to keep the machine going strong. We have the pump body, the rotor, the crescent-shaped suction port, the discharge port, and of course, the gears. These gears do the heavy lifting, literally, as they rotate and create the necessary pressure to pump the oil throughout the machine. It’s like a well-choreographed dance, with each part playing its unique role to keep the show running smoothly. So, next time you see an injection molding machine in action, take a moment to appreciate the oil pump silently working its magic behind the scenes. Trust me, it’s a major player in the grand scheme of things. And remember, keep that oil pump well-maintained, and it will reward you with precise, efficient, and high-quality plastic products. Now, let’s move on to the not-so-fun part – the common causes of damage to the oil pump. Brace yourself, folks, this could get ugly.

Analysis of The Causes of Damage to The Oil Pump of The Injection Molding Machine (1)

Causes of Oil Pump Damage

The oil pump is the “heart” of the injection moulding machine’s hydraulic system. Therefore, at any time when the hydraulic system problems, we will often blame the problem on the oil pump. In fact, in terms of the cause of oil pump damage, because of the lack of oil pump itself caused by the phenomenon is rarely seen. More correctly, when the working condition of the pump deteriorates, it shows that in the hydraulic system, has hidden other problems of a symptom.

1. Air mixing

Air mixing, refers to a kind of bubble in the system of hydraulic oil in the spread of the phenomenon. When the oil system is compressed air bubbles facing the pump outlet pressure, this rupture effect will occur. This rupture effect will cause the pressure side plate inside the pump, wear-resistant side plate and other metal surfaces near the rupture point of the peeling phenomenon, and lead to extremely high temperatures in place.

Due to the air mixing phenomenon, the pump will produce a loud sound like thunder and lightning. The pitch of this noise increases as the pressure rises, and excessive air mixing can lead to emulsification of the hydraulic fluid (due to the large amount of water in the air). In addition, the compression of the air in the hydraulic fluid causes problems such as poor operation of the hydraulic components.

The possible ways of getting air into the pump:
1. Bad shaft seal.
2, the tank to the pump inlet part of the joint leakage.
3, the oil level is too low or return to the oil tank of the return pipe is installed on the oil surface, resulting in the oil tank of the hydraulic oil bubbles, not yet eliminated its bubbles when it is sucked back into the pump.

2. Cavitation

Is when the pressure is reduced to saturation vapour pressure below the presence of hydraulic fluid in the fluid occurs in a local cavitation phenomenon. To put it more simply, if the hydraulic oil is not completely filled with the space that should be occupied, i.e. there is a vacuum in the oil circuit, it will cause this cavitation phenomenon.
The noise caused by cavitation is similar to the noise caused by the air mixing phenomenon. The cavitation phenomenon is caused by the following factors:

1, pump and electric motor mismatch problem, resulting in pump speed is too high.
2, pump suction pipe too long, or for the suction port is limited.
3, the viscosity of the hydraulic oil is too high.
4, the tank on the discharge port is blocked.
5 Check the pump suction filter.

3. Contamination

Any foreign matter in the circuit of a hydraulic system can adversely affect the efficiency of the hydraulic components and their circuits. Contamination can be solid, liquid or gaseous.
Most contaminants will cause frictional movement between the work piece and the tight clearance of the work piece, resulting in accelerated wear and cracking of the work piece.

Sources of contamination in the oil circuit can be broadly divided into
1. cast cylinder, oil block, oil tank interior, pipe joints, etc.
2. oil seal or O-ring embrittlement fracture.
3. Hydraulic oil deterioration at high temperature for a long time, resulting in oil contamination.
4. pump due to air mixing or cavitation caused by metal surface stripping material.

4. Overheating

Because of more than the specified upper limit temperature, and cause fluid viscosity change a thermal phenomenon. Overheating will cause accelerated oxidation of the hydraulic fluid and make the hydraulic fluid viscosity deterioration, and cause a chain reaction, thus causing overheating of the real cause must be ruled out, so that the effective correction of this problem.
Causes of overheating:
1, overload operation, overpressure use.
2, caused by air mixing and cavitation phenomenon.
3, caused by oil contamination.

5. Excess pressure

Refers to the operating pressure is greater than the design pressure of the pump. Overpressure will make the pump internal workpiece suffered a great force and cause early damage to the internal workpiece.
Above is the impact of the injection moulding machine oil pump use of the reason analysis, in general, the oil pump by the external environmental factors have a greater impact, camel pack editorial reminder, in the use of must do a good job of maintenance and repair, in order to extend the use of the oil pump period.


Effects of Oil Pump Damage

Who knew such a tiny component could cause such a big headache? But fear not, my fellow molders, for today we shall delve into the effects of oil pump damage and why it’s important to address it promptly.

When your oil pump is damaged, it can’t work its magic properly, and as a result, the injection molding machine suffers. It starts moving at a snail’s pace, making you wonder if it’s actually procrastinating instead of producing quality products. Trust me, you don’t want a machine that’s slower than the average senior citizen trying to navigate a busy intersection.

But wait, there’s more! With oil pump damage comes increased downtime and production delays. Imagine this: you’re all geared up to meet a tight deadline, but your machine decides to take a siesta because of the faulty oil pump. Goodbye, productivity! Hello, frustration! You’re left twiddling your thumbs and watching the clock tick away, as your profits take a nosedive and your clients start giving you that dreaded side-eye.

Analysis of The Causes of Damage to The Oil Pump of The Injection Molding Machine (3)

And let’s not forget about the cherry on top:

higher repair and replacement costs. When your oil pump says, “I’m done, peace out,” it’s not just a minor inconvenience. You’ll find yourself digging deep into your pockets to cover the costs of fixing or replacing the darn thing. And let’s not pretend like that’s a fun way to spend your hard-earned cash. I’m pretty sure your dream vacation doesn’t involve funding the oil pump repair shop, am I right?

So, my friends, in order to avoid this disastrous rollercoaster ride, it’s essential to address oil pump damage as soon as possible. Don’t let your injection molding machine become a slowpoke, causing delays and draining your wallet. Reach out for regular maintenance, proper lubrication, and filtration. Keep an eye on temperature and pressure. And hey, let’s not forget to educate and train those operators so they can spot trouble before it escalates.

Remember, the life of an injection molder is full of twists and turns, but with proper care and attention, you can keep your oil pump running smoothly, your efficiency soaring, and your bank account happy. So, buckle up and let’s make sure your injection molding machine stays on the fast track to success!

The signs of oil pump damage

It’s like trying to unravel a mystery, isn’t it? Well, fear not, dear reader, for I, your friendly content marketer, am here to guide you through this perilous journey.

One of the key indicators of oil pump damage is abnormal noise and vibrations coming from the injection molding machine. It’s almost like the machine is trying to communicate with you, but in a very loud and unsettling way. These noises and vibrations can be a sign of trouble brewing within the oil pump, so it’s best not to ignore them.

Another red flag to watch out for is fluctuating pressure and flow rate. Imagine if your morning cup of coffee suddenly started alternating between lukewarm and scorching hot. It wouldn’t be a pleasant experience, would it? Well, the same goes for the injection molding machine. Inconsistent pressure and flow can lead to poor product quality and a whole lot of frustration.

And speaking of product quality, that’s another telltale sign of oil pump damage. If your once perfectly formed products are now coming out wonky and misshapen, it’s time to investigate the oil pump. After all, nobody likes a wonky product, unless you’re going for that avant-garde, abstract art vibe.

Remember, dear reader, keeping an eye out for these signs can save you a whole lot of headache in the long run. So, the next time your injection molding machine starts making strange noises, or your products come out looking like modern art gone wrong, don’t panic. Take a deep breath, roll up your sleeves, and get to the bottom of that oil pump damage. Your future self will thank you.

Preventive Measures:

The joys of preventing oil pump damage in injection molding machines! It’s like trying to keep a delicate flower safe amidst a hurricane. But fear not, dear readers, for I have some amazing preventive measures up my sleeve that will make your oil pump jump with joy and keep your injection molding machine running smoothly. Let’s dive into the world of maintenance and precautions, shall we?

Regular maintenance schedule:

Think of it as an appointment with your favorite hairstylist, but instead of getting a fabulous haircut, you’re giving your oil pump some tender love and care. Stick to a strict maintenance routine, and you’ll be amazed at how this simple act can act as a shield against potential damage.

Proper lubrication and filtration:

Picture this: your oil pump is a race car, and lubrication is the fuel it needs to burn rubber on the tracks of your injection molding machine. Without it, your pump will be driving on fumes, and we all know how well that ends. So, make sure to keep the oil levels in check and change them regularly. Oh, and don’t forget about the filtration system – it’s like a spa treatment for your oil, ensuring that it’s free from any impurities and contaminants.

Temperature and pressure monitoring:

Just like Goldilocks and her porridge, your oil pump craves the perfect temperature and pressure. Too hot, and it starts to sweat (in a not-so-pleasant way), and too much pressure can make it feel like it’s carrying the weight of the world on its tiny metal shoulders. So, keep a watchful eye on these parameters and make adjustments as needed – trust me, your oil pump will thank you.

Lastly, but definitely, not least, we have training and education for operators. It’s like watching a magic show, where the operators are the magicians and the oil pump is the smiling bunny they pull out of a hat. By providing proper training and education, you’re equipping your operators with the knowledge and skills they need to handle the oil pump with care. After all, nobody wants a frantic magician throwing rabbits left and right.

So there you have it, my fellow injection molding enthusiasts! These preventive measures are the secret recipe to keeping your oil pump happy and healthy. Maintain a regular schedule, lubricate and filter like a pro, monitor the temperature and pressure like a boss, and educate your operators to be masters of their craft. With these tricks up your sleeve, you’ll be breezing through the world of injection molding while other machines are left in the dust.


So, we’ve reached the end of this enlightening journey through the causes of damage to the oh-so-important oil pump of an injection molding machine. Let’s quickly recap the key takeaways before bidding adieu!

First and foremost, never underestimate the power of proper maintenance. Neglecting it can lead to a world of trouble for your oil pump, resulting in decreased efficiency, production delays, and sky-high repair costs. Trust me, you don’t want that!

Secondly, ensure that your oil pump receives the love it deserves by providing it with adequate lubrication and filtration. Treat it like a high-maintenance diva, and it’ll reward you with smooth operation.

Oh, and don’t forget about regular temperature and pressure monitoring. Just like keeping tabs on your coffee temperature, it’s crucial to prevent overheating and potential disasters.

Lastly, invest in training and education for your operators because knowledge is power. Equip them with the skills they need to handle any oil pump-related issues that may pop up.

Alright, folks! That’s all we have for today. Thanks for joining me on this quirky journey into the depths of oil pump damage analysis. Until next time, keep those oil pumps running smoothly and your injection molding machines purring like contented kittens. Happy manufacturing!

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