Injection Molding Machine Loader Overload: Causes and Solutions

Injection Molding Machine Loader Overload Causes and Solutions

What is an injection molding machine? Well, my friend, it’s a fascinating piece of equipment that brings life to our plastic dreams. It’s like a magician, transforming melted plastic into all kinds of useful objects. From intricate toys to complex automotive parts, this machine can do it all. But wait, there’s more! Let’s talk about injection molding machine loader. These loaders play an important role in the injection molding process. They ensure a smooth and efficient material supply to the machine. Think of them as the vending machines of the plastic world, feeding the injection molding machine with the right amount of raw material. Hopper loaders, vacuum loaders, and venturi loaders are among the popular types. Sounds interesting, right? Okay, let’s move on to the next section, where we’ll explore the causes of overload in these loaders. Brace yourself, my friend, because things are about to get overloaded with information!

What is Loader Overload?

Loader overload occurs when the loader of an injection molding machine is subjected to a load greater than its designed capacity. This can lead to machine malfunctions, reduced efficiency, and even damage to the equipment.

Injection molding machine (2)

Causes of overload in injection molding machine loaders

So, you’ve got yourself an injection molding machine loader. Fancy piece of equipment, isn’t it? But here’s the thing – these loaders can sometimes experience overload, which can be a real pain in the you-know-what. Let’s dive into the causes of this pesky issue. The main reasons for overloading the injection moulding machine’s loader can be as follows-

1. Equipment failure:

The loader fan fails or the motor parts are damaged, resulting in insufficient airflow or motor speed, which reduces the working efficiency of the loader and causes overload.

2. improper operation:

The user does not operate the vacuum cleaner in accordance with the operating instructions, or uses too much material in the hopper, resulting in overload.

3. power supply voltage fluctuation:

The lack of stability of the power supply voltage or defects in the power line, resulting in unstable operation of the vacuum cleaner, resulting in overload.

4. Heavy sieve clogging

This situation will make the vacuum feeding machine pumping pipeline pressure increases, but the vacuum chamber inside the air pressure is insufficient, the vacuum pump will work for a long time in this way will be in an overloaded state, which will trigger a high pressure alarm.

5. Severe blockage of the suction line

Suction is generally used in the hose, if the congestion is serious, the material will be collected in the congestion can not pass, the internal pressure of the silo will be too high, resulting in pressure alarm. Frequently congested location is the mouth of the loader pipe, loader pipe wall somewhere.

Precision Injection Molding Machine

Solutions to Prevent Overload

So, you’ve already learned about the causes of overload in injection molding machine loaders. Trust me, it’s not a pretty sight when your machine decides to give up on you just because it’s had enough of your shenanigans. But fear not, my friend! There are ways to prevent this catastrophe from happening, and we here to enlighten you about them.

Check the equipment failure:

If the overload is caused by equipment failure, you can find professional maintenance personnel to overhaul and replace the faulty parts to ensure that all parts of the vacuum cleaner normal operation.

Clean the hopper:

As too much material in the hopper can also lead to overload, the hopper and suction nozzle should be cleaned regularly to ensure normal suction. Regularly maintain the suction pipe to prevent material build-up and clogging. Check and clean the screen regularly and replace if necessary. Although the filter screen is cleaned by a back-blowing system, it is not easy to blow clean if the material is too sticky, and if the back-blowing system is inefficient or damaged, it should be repaired and replaced in good time.

Check the stability of the power supply voltage:

you can use a multimeter and other tools to check the fluctuation of the power supply voltage, if the voltage is unstable, you can take some measures, such as installing voltage regulators and other equipment to ensure the stability of the power supply voltage.

Check the use of operation:

The use of loader should pay attention to check and comply with the relevant instructions for use, to ensure the proper operation of the use of loader, can not be overloaded.

Impact of overload on the injection molding process

Ah, the impact of overload on the injection molding process. Let’s dive into this exciting topic, shall we? Picture this: you have an injection molding machine, all set and ready to go. But oh no, there’s an overload! Cue the dramatic music.

First off, when your machine is overloaded, you can say goodbye to efficiency. It’s like trying to run a marathon with a backpack full of rocks. Your production speed slows down, and you start churning out products at a snail’s pace. It’s a nightmare for anyone who values productivity. So, consider efficiency to be a thing of the past.

Next up, we have increased downtime. Who doesn’t love having their machine sit idly by, sipping on a martini, while you’re left twiddling your thumbs, right? Overload leads to machine malfunctions and breakdowns, resulting in valuable production time going down the drain. Let’s all thank the overload for stealing our precious downtime.

And finally, let’s talk about everyone’s favorite topic: costs. Brace yourselves, because overload brings along a hefty price tag. As efficiency goes down the drain and downtime goes up, guess what happens? That’s right, higher production costs! It’s like throwing money out of the window, while also watching your profits take a nosedive. Fun times, my friends, fun times.

So, there you have it. The impact of overload on injection molding process is a triple threat: reduced efficiency, increased downtime, and higher production costs. It’s the villain that sneaks into your production line, wreaking havoc and stealing your productivity. But fear not, for we shall explore the solutions soon. Stay tuned!

Signs of an overloaded loader

Ah, signs of an overloaded loader! The drama, the chaos, the mayhem! It’s like watching a train wreck happening in slow motion. Let’s dive into the key indicators that your injection molding machine loader might be on the verge of a nervous breakdown.

First, we have material spillage. Oh dear, it’s like a volcano erupting, with plastic pellets spewing out in every direction. It’s quite the spectacle! Your loader is struggling to handle the excessive material, and it’s making its displeasure known.

Next up, we have machine jams or blockages. Picture this: your loader is working tirelessly, trying to push those pellets through, but everything comes to a screeching halt. It’s like a traffic jam during rush hour – frustrating, time-consuming, and just plain annoying.

And let’s not forget the unusual noises and vibrations. It’s like a dance party gone wrong. Your loader is shimmying and shaking, making all sorts of weird sounds that have you questioning its sanity. It’s clear that something is terribly wrong.

So, if you notice any of these signs, it’s time to take action. Don’t just stand there and watch the spectacle unfold. Address the issue, give your loader some much-needed TLC, and prevent the impending disaster.

Remember, an overloaded loader can wreak havoc on your injection molding process. Efficiency goes down the drain, downtime increases, and production costs shoot through the roof. And nobody wants that, right?

Stay tuned for the next section, where we’ll explore some preventive measures to keep your loader from going off the rails. Because let’s face it, a smooth injection molding process is what dreams are made of.


Loader overload in injection molding machines can lead to decreased efficiency, machine downtime, and costly repairs. By understanding the causes and implementing the solutions mentioned above, manufacturers can maintain optimal production levels and extend the lifespan of their equipment. Remember, regular maintenance and inspections are key to preventing overloads and ensuring the smooth operation of your injection molding machine.

If you found this article helpful, please share it with others in the industry. For more insights on injection molding and other related topics, stay tuned to our blog!

Injection Molding FAQ

Q: What’s the solution for mold adjust moving forward and backward?

A: Ensure mold is properly aligned and clamped. Check and calibrate the machine’s hydraulic and control systems.
Q: How can I address gas traps in injection molding?

A: Optimize venting by adding or enlarging vents, and adjust injection speed and pressure to ensure smooth flow.
Q: What causes shrinkage defects in injection molding?

A: Shrinkage is often due to uneven cooling or insufficient packing. Adjust cooling rates and packing pressure for consistency.
Q: What if the hydraulic closing safety cartridge is defective?

A: Replace the cartridge immediately and inspect the hydraulic system for any other potential issues or contaminants.
Q: What is ghosting in injection molding?

A: Ghosting refers to faint, shadow-like defects on a molded part, often caused by inconsistent material flow. Adjust gate locations and ensure uniform wall thickness.
Q: How can I prevent flash defects in injection molding?

A: Ensure molds are properly aligned and clamped, and regulate injection pressure to prevent excessive material from escaping the mold.
Q: What are common injection molding issues?

A: Common issues include warping, sink marks, short shots, and weld lines. Addressing them requires a combination of mold design, material selection, and processing adjustments.

More To Explore

Send Your Inquiry Now

Frequently Asked Questions

Daoben has the SOP (Standard Operation Procedure) and all the production steps must follow up this SOP. Every machine needs at least automatic running over 72 hours and must be inspected carefully before shipment.

Actually, the delivery time of the machines is depended on the machine options. Normally, the delivery time of a standard machine could be within 1-2 months.

12 months warranty after shipment for mechanical parts, hydraulic parts, and electric components excluding the screw and barrel 6 months (not including use for recycled material or reclaimed material).

Yes, Daoben will provide one set of standard spare parts to the customer including a heater, filter, screw head, screw washer, checking ring, sealings, etc.

Surely, we have experienced technical engineers for oversea service, they would help you install machines and support training to workers also. Currently, we provide visits online by video call for COVID-19.

Send Us Your Inquiry