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5 Minutes to Understand Shredder blades
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5 Minutes to Understand Shredder blades

Views: 138     Author: Site Editor     Publish Time: 2021-02-04      Origin: Site

9crsi material shredder blades are of high quality and low price, which is the choice of most customers. Our 9crsi shredder blade is suitable for cutting and crushing plastics, mineral water bottles, wood, film, car interiors, PE, etc.


Chemical composition of shredder blade


Carbon C: 0.85~0.95

Silicon Si: 1.20~1.60

Manganese Mn: 0.30~0.60

Sulfur S: ≤0.030

Phosphorus P: ≤0.030

Chromium Cr: 0.95~1.25

Nickel Ni: allowable residual content ≤0.25

Copper Cu: allowable residual content ≤0.30


Mechanical properties of shredder blade

Hardness: Annealing, 241~197HB, indentation diameter 3.9~4.3mm; 187~229HB (used for manufacturing thread tools); quenching, ≥62HRC


Heat treatment specification and metallographic structure:

Heat treatment specification: sample quenching 820~860℃, oil cooling.


How to choose shredder blade


For customers, choosing suitable shredder blades according to different materials needs to focus on four things.

1. The shredder machine is divided into the two-shaft shredder and a single-shaft shredder. Before buying, figure out what type of shredder blade you need.

2. According to the actual use, choose the appropriate shredder blade model. Due to the different types of shredder equipment, the blade specifications are different. Before ordering, communicate with our salesperson first so that our engineers can recommend the appropriate shredder blade style.

3. On the basis of ensuring the quality of the shredder blade, try to choose a blade with high-cost performance. There are two main factors to consider when buying shredder blades, one is quality and the other is the price.

4. There are 6crw2si, 9crsi, Skd11, skd61, H12, H13 and other materials for selection.


The benefits of sharpening the shredder blade


The blade of the plastic shredder is an important part. If it is worn or blunt, it must be repaired or replaced in time. The shredder knife will affect the shredding effect of the entire equipment after being blunt, so it should be overhauled in time. In normal times, check and maintain the shredder blade.


The sharpening of shredder knives is different from the sharpening of other knives. Other types of mechanical blades basically use a grinder to grind the flat surface or the cutting edge part. The structure of the shredder cutter is unique, and the design of the multi-claw blade makes it impossible for the grinder to sharpening it. A single flat grinding of the blades will cause the gap between the blades to be too large and seriously affect the use.


So how to grind the cutter of the shredder? We must first understand that the wear of the shredder blade is mainly the wear on the claws. The easiest way to grind is to polish the inside of the blade with a polishing machine until the blade is sharp. Be careful to plan and grind along the arc of the claw, and it must be perpendicular to the plane of the shredder blade. In this way, the loss of the original knife body will be minimal.

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