Plastic Injection Molding Site Blog

The Plastic Injection Molding Site Blog is my mini-journal about Injection Molding.

It...

- lets you know when any new postings appear (like brief comments and suggestions on how to improve part quality, productivity and operational efficiencies using current technology and know-how)

- lets you know when any new web pages appear.

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What’s would be the extra material to keep at the matching area of core and cavity inserts

1What’s would be the extra material to keep at the matching area of core and cavity Inserts 2. How to provide spacer lengths interms of ejection length

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Proven Mold Designs for Sale

Thinwall Packaging Mold Designs for Sale- Go Shopping Today!

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Injection Molding Training for Thin Wall Packaging Parts

Start making & processing thin wall molds at a profit with injection molding training.

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Support pillars

Is there any specific calculation for using a particular size of support pillars and it's placing?

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Gas vent

How to improve gas vent for part having mirror face?

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3 Plate Mold Design For Injection Molding

Learn how to design a 3 plate mold and when to use a 2 plate mold design.

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Setting Hold Time and Hold Pressure to Run an Optimized Process

Learn how to make quality parts without spending money

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3D Rapid Prototyping in Injection Molding

Learn how 3D rapid prototyping benefits the injection molding industry

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Injection Capacity Calculator For Injection Molding Machines

Different plastics have different melt densities which alters the injection capacity of a screw and barrel assembly. Use this injection capacity calculator to find the capacity of your machine.

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Production Calculators For Injection Molding

Need to know how long your next production run will take? Or how much material to order? Production calculators used to find the production rate, time & plastic material requirement.

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Stack Molds Improve Productivity And Reduce Your Costs

If you want to nearly double your production per molding machine, then stack molds might be for you.

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Mold Polishing Tips For Injection Molds

Learn about the different types of finishes in mold polishing

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How To Estimate Weight Of An Injection Mold Tool

For those of you who do not have scales here is an easy way to find mold weight.

Injection Mold Weight

Calculation For Metric Units (cm)

Measure overall dimensions of the mold.

Refer to above image of mold for length, width & height.

For example:

If Length=80cm Width=90cm Height=45cm

and Weight(kgs)= LengthxWidthxHeightxDensityOfSteel where density is 7.9 grams/cm^3 for tool steel (P20,H13)

then Weight(kgs)= (80x90x45x7.9)/1000= 2,560 kgs

Calculation For Imperial Units (Inches)

Measure overall dimensions of the mold.

Refer to above image of mold for length, width & height.

For example:

If Length=25 inch Width=35 inch Height=20 inch

and Weight(lbs)= LengthxWidthxHeightxDensityOfSteel where density is 0.28 lbs/inch^3 for tool steel (P20,H13)

then Weight(kgs)= (25x35x20x0.28)= 4,900 lbs


All calculations & technical data are for comparison purposes only and are NOT for design or safe working practices. It is derived from sources that we believe to be accurate, but can NOT guarantee its validity. Your specific application should NOT be undertaken without independent evaluation for accuracy.

Mold Flow Analysis Simulation Benefits

Learn how mold flow analysis software can save you time and money in getting quality parts to market on time.

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Injection Molding Consulting Will Improve Quality and Productivity.

Specializing in Troubleshooting Thin Wall Molding Problems - Injection Molding Consulting

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Life of a wear plate

How long is the maximum life of a wear plate? Answer: The purpose of a wear plate in an injection mould is to act as a sacrificial component in preference

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Gate Type & Mold Steels

Question by Mohamed: How to choose the correct gate type and the correct mold steel? Answer: The type of gate depends upon a number of factors including

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Nox-Rust Paper

Question: What problems other than a visual indicator could be caused by using nox-rust paper on the back plates of injection molds? My answer: I wouldn't

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A Nucleating Agent Can Improve Productivity Immediately

Learn how a nucleating agent can improve part quality and reduce cycle time with this case study

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Plastic Raw Material For Easier Processing

Learn which plastic raw material will improve cycle time and part quality in injection molding

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