Intensive Concrete Mixer Blades Replacing Guide

Maintaining optimal performance of an intensive concrete mixer heavily relies on the condition of intensive concrete mixer blades

These components face significant wear and tear due to the abrasive nature of concrete materials. Regular inspection and timely replacement of the mixing blades are crucial for efficient mixing and extending the equipment’s lifespan. 

Here’s a comprehensive guide on replacing intensive concrete mixer blades, emphasizing safety, inspection, proper replacement procedures, and adjusting blade-to-liner gaps to optimize mixer performance.

Intensive Concrete Mixer Blades
Intensive Concrete Mixer Blades

Intensive concrete mixer blades replacing steps

When replacing the blades of an intensive concrete mixer, several key factors need to be considered to ensure the process is done safely and effectively. Here are the main points to pay attention to:

Safety Precautions

1. Always turn off and disconnect the power to the mixer before starting any maintenance work, including intensive concrete mixer blade replacement. This prevents accidental startup and potential injuries.

2. Put on proper personal protective equipment such as safety glasses, gloves, and protective clothing to protect against sharp edges and debris.

Inspection and Preparation

1. Inspect the current intensive concrete mixer blades and mixer drum for excessive wear, cracks, or concrete buildup.

2. Clean out any hardened concrete residue. This can be done using a high-pressure washer to remove any residual concrete from the blades and drum.

Intensive Mixer Blade Replacement Process

1. Check the bolts and fasteners that secure the intensive concrete mixer blades to the mixing arms. Ensure they are not worn out or damaged. Loose or damaged bolts should be replaced to ensure the new blades are securely attached.

2. When installing the new intensive concrete mixer blades, ensure they are properly aligned and positioned at the correct angle. This is crucial for maintaining the efficiency of the mixing process and preventing uneven wear.

3. Use a torque wrench to tighten the blade bolts to the recommended torque settings. Do not overtighten or it could damage the components.

Post-Replacement Checks

1. After installing the new blades, check the clearance between the intensive concrete mixer blades and the mixer drum. The ideal gap is typically around 3 mm. Adjust the blade height if necessary to achieve this clearance.

2. Rotate the mixer drum manually to ensure the blades do not contact the drum lining or other components. This helps verify that the blades are correctly installed and aligned.

3. Perform a test run of the mixer without any load to ensure the blades are functioning correctly and there are no unusual noises or vibrations.

Judge When to Replace Intensive Concrete Mixer Blades

To determine if you need to replace the mixing blades on your concrete mixer, you should regularly inspect them for wear and damage. Here are some key points on when and how often to replace the mixing blades:

  • Inspect the mixing blades regularly for signs of excessive wear, such as thinning, cracks, or bending.
  • As a general guideline, mixing blades may need to be replaced every 6 months to 2 years depending on the volume of concrete produced and the abrasiveness of the materials. Higher production means more frequent replacement is needed.
  • Don’t wait until the blades are completely worn down, as this can lead to inadequate mixing and potential damage to other components.

Gap Issue Between Blades and Liners in Intensive Concrete Mixers

The Gap Issue Between Blades and Liners directly affects the operating efficiency and mixing quality of the intensive concrete mixer.

There are two methods to adjust the gap:

1. Adjust the blade position: Loosen the fixing screws and move the blade position to change the gap between the blade and liner;

2. Adjust the liner position: Adjust the position of the liner to change the gap between the liner and the blade.

Problems Caused by Excessive or Insufficient Gap

If the gap between the blades and liners of an intensive concrete mixer is too small, it may cause excessive friction between the blades and liners, high energy consumption, and even the risk of blade burnout. 

If the gap is too large, it will affect the mixing effect of the equipment, reducing the mixing quality and work efficiency.

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