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How to Cut a Plastic Storage Box?

Published in Plastic Cutting 3 mins read

Cutting a plastic storage box typically involves using the right tool for the type of plastic and the desired cut, often starting with a method that provides a clean, easy entry point like snips for thicker plastic.

Choosing the Right Tool

Selecting the appropriate tool is crucial for a clean and safe cut on a plastic storage box. The best tool depends on the plastic's thickness and the complexity of the cut.

  • Utility Knife: Suitable for thinner plastics. Requires multiple passes to cut through.
  • Snips (Heavy-Duty Shears): As mentioned in the reference, snips are effective for cutting through thicker plastic, providing a nice easy start and being easier than a knife in such cases. You can simply line it up and snip.
  • Jigsaw or Rotary Tool: Good for making curved cuts or cutting thicker, rigid plastic. Requires proper blades for plastic.
  • Handsaw: Can be used for straight cuts on very rigid or thicker plastic, often with a fine-tooth blade.

Step-by-Step Cutting Process

Once you have your tool, follow these steps:

  1. Preparation & Safety: Always wear safety glasses to protect your eyes from flying plastic fragments. Ensure your workspace is stable.
  2. Mark the Cut Line: Use a marker or pencil to clearly draw the line you want to cut on the plastic box.
  3. Secure the Box: If possible, secure the box to prevent it from shifting while you cut.
  4. Make the Cut:
    • Using Snips: For thicker plastic, align the snips with your marked line and make steady snips.
    • Using a Utility Knife: For thinner plastic, score the line with the knife multiple times, applying gradual pressure until you cut through.
    • Using a Saw/Rotary Tool: Follow your marked line carefully, letting the tool do the work. Use a slow, steady pace to avoid melting the plastic.
  5. Smooth Edges (Optional): The cut edges can be sharp. You can smooth them using sandpaper (start with coarse, finish with fine) or a file.

Tips for Success

  • Safety First: Always prioritize safety by wearing protective gear and using tools correctly.
  • Start Slow: Especially with new tools or materials, make a test cut on a scrap piece if possible.
  • Support the Plastic: Ensure the plastic is supported near the cut line to prevent it from bending or breaking unevenly.
  • Consider the Heat: High-speed tools like rotary tools can melt plastic. Use a moderate speed and don't force the cut.

Comparing Common Tools

Tool Best For Plastic Thickness Ease of Start (Thicker Plastic) Cut Type
Utility Knife Thin plastic Thin Difficult Straight/Slight Curves
Snips General cutting Medium to Thick Easy Straight
Jigsaw/Rotary Complex shapes, thick plastic Thick Moderate Straight/Curved
Handsaw Straight cuts Very Thick Moderate Straight

Cutting a plastic storage box is manageable with the right approach and tools. Whether creating a custom opening or resizing, careful preparation and execution lead to the best results.

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