Penetration Casting
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Penetration Casting
https://www.linkedin.com/company/foundry-management-&-technology/
Automating Iron Treatment, Inoculation
Cut Porosity, Raise Casting Productivity
Less Smoke, Higher-Quality Castings
Experience, Skill, and Resources Advance the Value of Resin Technologies
The Right Atmosphere for Quality Cores, Molds
3DP Improves Filter Design, Metal Filtration
A Better Formula for the Best Release
Tracing Variations in No-Bake Curing
Understanding the Science Behind Penetration Defects
Metalcasters should learn how penetration defects happen, and how to prevent them
Why gaps form in molds
Coating rheology
Factors behind the fundamentals
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No comments have been added yet. Want to start the conversation?
New Release Agents Limit VOCs for Green Sand
Looking Beyond the Environmental Benefits of Inorganic Binders
New Formulation for Cleaner Tooling, Better Productivity
Choosing Better Casting Yield and Casting Cleanliness
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Q: What is the science behind penetration defects? I’ve had it explained to me in the past, but those explanation always seem to be oversimplified. I’d like to know the mechanics of how penetration happens, and how to prevent it.
A: Penetration is one of the more common defects discovered on castings. In fact, the commonness of such defects encountered by so many foundries probably explains the “oversimplified” responses you often receive. Presumably, you’ve been told that gaps within the mold are responsible for the occurrence of penetration, and that’s actually quite true. However, there probably are very few people who properly understand why these gaps form, or how to prevent them.
Mold coatings are a well-known preventative measure to address penetration defects. Undoubtedly you’ve heard this before, though. Still, it’s critical to recognize what makes a good coating. Rheology (a technical term used by researchers) explains what separates and distinguishes a good coating from the others. In short, rheology describes the measurement / determination of a liquid / solid matter’s flowability.
Now, it’s important to ask, “What is flowability?” This is a term that characterizes the effects of deformation on the liquid, as well as solid components. The deformation of matter is essentially a reaction at the impact of a specific force. Surely this all makes sense, right? (I’m kidding, of course.)
However, just know this, the effects of poor rheology will include insufficient layer thickness, teardrops, runs, prolonged handling times, inhomogeneity, and problems with core prints. Ultimately, it’s very important to trust a coating supplier with strong Research & Development and proven Technical Services. That way, you’ll ensure you’re receiving a coating with the ideal rheology characteristics to meet your requirements.
Now, let’s discuss the science behind a penetration defect.
Penetrations: Defect Pattern & Causes — Fundamental causes for real (mechanical/physical) penetration are metallostatic pressure, dynamic pressure during casting, and crystallization pressure during solidification.
Penetration can thus occur as a function of the following influence factors:
• The grain size of the mold material is too large and the grain particle size distribution is too broad;
• The proportions of binder are too low. The proportion of materials that form lustrous carbon is too low
• Unfavorable chemical composition of the casting material in combination with casting temperatures and metallostatic pressure that are too high;
• Inadequate and uneven compaction of the molds or cores;
• Inadequate gating system and therefore excessive overheating of molds and core components.
Join the Conversation. Email Your Questions for ASK Chemicals
Share your insights, opinions, and elaborate on the questions and the experts' answer(s). You must be logged in to the website in order to post your comments.
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https://www.linkedin.com/company/foundry-management-&-technology/
Automating Iron Treatment, Inoculation
Cut Porosity, Raise Casting Productivity
Less Smoke, Higher-Quality Castings
Experience, Skill, and Resources Advance the Value of Resin Technologies
The Right Atmosphere for Quality Cores, Molds
3DP Improves Filter Design, Metal Filtration
A Better Formula for the Best Release
Tracing Variations in No-Bake Curing
Understanding the Science Behind Penetration Defects
Metalcasters should learn how penetration defects happen, and how to prevent them
Why gaps form in molds
Coating rheology
Factors behind the fundamentals
This site requires you to register or login to post a comment.
No comments have been added yet. Want to start the conversation?
New Release Agents Limit VOCs for Green Sand
Looking Beyond the Environmental Benefits of Inorganic Binders
New Formulation for Cleaner Tooling, Better Productivity
Choosing Better Casting Yield and Casting Cleanliness
Sign up for Foundry Management & Technology eNewsletters SIGN UP
https://www.linkedin.com/company/foundry-management-&-technology/
Q: What is the science behind penetration defects? I’ve had it explained to me in the past, but those explanation always seem to be oversimplified. I’d like to know the mechanics of how penetration happens, and how to prevent it.
A: Penetration is one of the more common defects discovered on castings. In fact, the commonness of such defects encountered by so many foundries probably explains the “oversimplified” responses you often receive. Presumably, you’ve been told that gaps within the mold are responsible for the occurrence of penetration, and that’s actually quite true. However, there probably are very few people who properly understand why these gaps form, or how to prevent them.
Mold coatings are a well-known preventative measure to address penetration defects. Undoubtedly you’ve heard this before, though. Still, it’s critical to recognize what makes a good coating. Rheology (a technical term used by researchers) explains what separates and distinguishes a good coating from the others. In short, rheology describes the measurement / determination of a liquid / solid matter’s flowability.
Now, it’s important to ask, “What is flowability?” This is a term that characterizes the effects of deformation on the liquid, as well as solid components. The deformation of matter is essentially a reaction at the impact of a specific force. Surely this all makes sense, right? (I’m kidding, of course.)
However, just know this, the effects of poor rheology will include insufficient layer thickness, teardrops, runs, prolonged handling times, inhomogeneity, and problems with core prints. Ultimately, it’s very important to trust a coating supplier with strong Research & Development and proven Technical Services. That way, you’ll ensure you’re receiving a coating with the ideal rheology characteristics to meet your requirements.
Now, let’s discuss the science behind a penetration defect.
Penetrations: Defect Pattern & Causes — Fundamental causes for real (mechanical/physical) penetration are metallostatic pressure, dynamic pressure during casting, and crystallization pressure during solidification.
Penetration can thus occur as a function of the following influence factors:
• The grain size of the mold material is too large and the grain particle size distribution is too broad;
• The proportions of binder are too low. The proportion of materials that form lustrous carbon is too low
• Unfavorable chemical composition of the casting material in combination with casting temperatures and metallostatic pressure that are too high;
• Inadequate and uneven compaction of the molds or cores;
• Inadequate gating system and therefore excessive overheating of molds and core components.
Join the Conversation. Email Your Questions for ASK Chemicals
Share your insights, opinions, and elaborate on the questions and the experts' answer(s). You must be logged in to the website in order to post your comments.
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Privacy Policy
https://www.linkedin.com/company/foundry-management-&-technology/
Automating Iron Treatment, Inoculation
Cut Porosity, Raise Casting Productivity
Less Smoke, Higher-Quality Castings
Experience, Skill, and Resources Advance the Value of Resin Technologies
The Right Atmosphere for Quality Cores, Molds
3DP Improves Filter Design, Metal Filtration
A Better Formula for the Best Release
Tracing Variations in No-Bake Curing
Understanding the Science Behind Penetration Defects
Metalcasters should learn how penetration defects happen, and how to prevent them
Why gaps form in molds
Coating rheology
Factors behind the fundamentals
This site requires you to register or login to post a comment.
No comments have been added yet. Want to start the conversation?
New Release Agents Limit VOCs for Green Sand
Looking Beyond the Environmental Benefits of Inorganic Binders
New Formulation for Cleaner Tooling, Better Productivity
Choosing Better Casting Yield and Casting Cleanliness
Sign up for Foundry Management & Technology eNewsletters SIGN UP
https://www.linkedin.com/company/foundry-management-&-technology/
Q: What is the science behind penetration defects? I’ve had it explained to me in the past, but those explanation always seem to be oversimplified. I’d like to know the mechanics of how penetration happens, and how to prevent it.
A: Penetration is one of the more common defects discovered on castings. In fact, the commonness of such defects encountered by so many foundries probably explains the “oversimplified” responses you often receive. Presumably, you’ve been told that gaps within the mold are responsible for the occurrence of penetration, and that’s actually quite true. However, there probably are very few people who properly understand why these gaps form, or how to prevent them.
Mold coatings are a well-known preventative measure to address penetration defects. Undoubtedly you’ve heard this before, though. Still, it’s critical to recognize what makes a good coating. Rheology (a technical term used by researchers) explains what separates and distinguishes a good coating from the others. In short, rheology describes the measurement / determination of a liquid / solid matter’s flowability.
Now, it’s important to ask, “What is flowability?” This is a term that characterizes the effects of deformation on the liquid, as well as solid components. The deformation of matter is essentially a reaction at the impact of a specific force. Surely this all makes sense, right? (I’m kidding, of course.)
However, just know this, the effects of poor rheology will include insufficient layer thickness, teardrops, runs, prolonged handling times, inhomogeneity, and problems with core prints. Ultimately, it’s very important to trust a coating supplier with strong Research & Development and proven Technical Services. That way, you’ll ensure you’re receiving a coating with the ideal rheology characteristics to meet your requirements.
Now, let’s discuss the science behind a penetration defect.
Penetrations: Defect Pattern & Causes — Fundamental causes for real (mechanical/physical) penetration are metallostatic pressure, dynamic pressure during casting, and crystallization pressure during solidification.
Penetration can thus occur as a function of the following influence factors:
• The grain size of the mold material is too large and the grain particle size distribution is too broad;
• The proportions of binder are too low. The proportion of materials that form lustrous carbon is too low
• Unfavorable chemical composition of the casting material in combination with casting temperatures and metallostatic pressure that are too high;
• Inadequate and uneven compaction of the molds or cores;
• Inadequate gating system and therefore excessive overheating of molds and core components.
Join the Conversation. Email Your Questions for ASK Chemicals
Share your insights, opinions, and elaborate on the questions and the experts' answer(s). You must be logged in to the website in order to post your comments.
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Privacy Policy
https://www.linkedin.com/company/foundry-management-&-technology/
Automating Iron Treatment, Inoculation
Cut Porosity, Raise Casting Productivity
Less Smoke, Higher-Quality Castings
Experience, Skill, and Resources Advance the Value of Resin Technologies
The Right Atmosphere for Quality Cores, Molds
3DP Improves Filter Design, Metal Filtration
A Better Formula for the Best Release
Tracing Variations in No-Bake Curing
Understanding the Science Behind Penetration Defects
Metalcasters should learn how penetration defects happen, and how to prevent them
Why gaps form in molds
Coating rheology
Factors behind the fundamentals
This site requires you to register or login to post a comment.
No comments have been added yet. Want to start the conversation?
New Release Agents Limit VOCs for Green Sand
Looking Beyond the Environmental Benefits of Inorganic Binders
New Formulation for Cleaner Tooling, Better Productivity
Choosing Better Casting Yield and Casting Cleanliness
Sign up for Foundry Management & Technology eNewsletters SIGN UP
https://www.linkedin.com/company/foundry-management-&-technology/
Q: What is the science behind penetration defects? I’ve had it explained to me in the past, but those explanation always seem to be oversimplified. I’d like to know the mechanics of how penetration happens, and how to prevent it.
A: Penetration is one of the more common defects discovered on castings. In fact, the commonness of such defects encountered by so many foundries probably explains the “oversimplified” responses you often receive. Presumably, you’ve been told that gaps within the mold are responsible for the occurrence of penetration, and that’s actually quite true. However, there probably are very few people who properly understand why these gaps form, or how to prevent them.
Mold coatings are a well-known preventative measure to address penetration defects. Undoubtedly you’ve heard this before, though. Still, it’s critical to recognize what makes a good coating. Rheology (a technical term used by researchers) explains what separates and distinguishes a good coating from the others. In short, rheology describes the measurement / determination of a liquid / solid matter’s flowability.
Now, it’s important to ask, “What is flowability?” This is a term that characterizes the effects of deformation on the liquid, as well as solid components. The deformation of matter is essentially a reaction at the impact of a specific force. Surely this all makes sense, right? (I’m kidding, of course.)
However, just know this, the effects of poor rheology will include insufficient layer thickness, teardrops, runs, prolonged handling times, inhomogeneity, and problems with core prints. Ultimately, it’s very important to trust a coating supplier with strong Research & Development and proven Technical Services. That way, you’ll ensure you’re receiving a coating with the ideal rheology characteristics to meet your requirements.
Now, let’s discuss the science behind a penetration defect.
Penetrations: Defect Pattern & Causes — Fundamental causes for real (mechanical/physical) penetration are metallostatic pressure, dynamic pressure during casting, and crystallization pressure during solidification.
Penetration can thus occur as a function of the following influence factors:
• The grain size of the mold material is too large and the grain particle size distribution is too broad;
• The proportions of binder are too low. The proportion of materials that form lustrous carbon is too low
• Unfavorable chemical composition of the casting material in combination with casting temperatures and metallostatic pressure that are too high;
• Inadequate and uneven compaction of the molds or cores;
• Inadequate gating system and therefore excessive overheating of molds and core components.
Join the Conversation. Email Your Questions for ASK Chemicals
Share your insights, opinions, and elaborate on the questions and the experts' answer(s). You must be logged in to the website in order to post your comments.
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Privacy Policy
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