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Investment casting process—the problem of shell delamination
A few days ago, a friend asked me if I had any materials on shell delamination. I thought he had a problem with some product, but actually, he wanted me to share information on shell delamination. And sure enough, we encountered such a shell delamination issue today. Here's what happened: After firing, when washing the shell of a product, we found that the inner surface layer had severely peeled off. No matter how we washed or poured it, we couldn't clean the shell properly. So, we...
A friend posted two photos with the question: "The disc tray holes are all reinforced with metal. Could you please tell me how to prevent this during the casing manufacturing process?" This is actually a very simple casting defect, and its cause is also quite simple. However, you might not be able to figure it out without careful analysis. But if you regularly read my WeChat official account, analyzing the cause of such defects will be very easy, so please follow my WeChat...
Definition and classification of gating systems
1、Definition and classification of gating systems Composition：It consists of a gating system (gating cup), a sprue, a runner, an ingate, a buffer recess, an air outlet, and a filter screen. Main functions：Drainage, shrinkage repair, wax removal, venting, slag removal, heating, auxiliary equipment. Classification: Generally, there are four types: top injection, side injection, bottom injection, combined injection. 2、Design principles of gating system Solidification principle: The design of...
How to Reduce Porosity Defects in Cast Al-Si Alloys
Hello everyone, I'm Venda from China. I've been working in the lost wax investment casting industry for over 20 years. Today, I'd like to briefly discuss how to reduce porosity in cast Al-Si alloys. If you have any insights, please leave me a message. My WhatsApp account is: +8618562112686. Sr modification is a key process in the casting of hypoeutectic Al-Si alloys. However, Sr modification can increase porosity in castings. This is partly because the introduction of Sr increases the Al-Si...
Investment castings - flash and burrs
Hello everyone, I'm Venda from Shandong Enon Automation Technology Co., Ltd. I've been working in the investment casting industry for over 20 years. Today, I'd like to discuss how flash and burrs are formed in investment casting. The following analysis is just my personal opinion. If you have any new insights, please add me on WA: +8618562112686 and leave me your valuable feedback. 1. Insufficient pressure or slow pressure increase, resulting in mold shell cracking during dewaxing; 2. Poor...
Some ideas for the development of various fields of casting
A few days ago, I wrote an article about my thoughts on the development of the foundry industry. Many colleagues called me and added me on WeChat to share their thoughts and feelings. The article was just a series of general opinions without much practical significance, but it resonated with my colleagues. Today, I would like to share some of my thoughts for your reference, and we can discuss them together. 1、 About learning:Therefore, as a foundry person, you need to learn more, walk more, see...
A new investment casting method for manufacturing heat-resistant steel turbine blades for aircraft engines Dear friends, today I would like to share with you a technical document《Novel approach to investment casting of heat-resistant steel turbine blades for aircraft engines》, which discusses in detail the integral turbine precision casting technology. Abstract Defects formed during the investment casting process of aircraft engine turbine blades pose a serious threat to flight safety and...
Won the Excellent Casting Equipment Award
At the 7th Shandong International Foundry Industry Exhibition in 2025, our company's wax processing equipment won the Excellent Foundry Equipment Award
Discussion on the Deep and Fine Hole Investment Casting Shell Process
Lost-wax investment casting enthusiast Venda I've been working in the investment casting industry for over 20 years. I'd like to share the operational details and process design of the deep and fine hole investment casting shell process for your reference. As shown in the figure above, the product has abnormal casting nodules and fins. This problem is a typical problem caused by insufficient strength after shell making in the hole. The insufficient strength comes from the following reasons and...
Introduction to the structure of precision casting equipment manipulator
Manipulators are a type of product of precision casting equipment. After using them, they can greatly improve production efficiency. Today, the editor will introduce the structure of the production manipulator. The manipulator is mainly composed of three parts: actuator, drive mechanism and control system. The hand is a component used to grasp the workpiece (or tool). There are various structural forms according to the shape, size, weight, material and operation requirements of...
When wax is used as a pattern, investment casting is also called "lost wax casting". Investment casting usually refers to making a pattern out of fusible materials, coating the surface of the pattern with several layers of refractory materials to make a shell, and then melting the pattern and discharging it from the shell to obtain a casting without a parting surface, which can be filled with sand and poured after high-temperature roasting. Since the pattern is widely made of wax...
Precision casting equipment is produced by the precision casting process, so what is the process of precision casting? The following precision casting equipment editor will tell you. Wax pressing (wax injection to make wax mold)---wax repair----wax inspection----tree assembly (wax mold tree assembly)---shell making (first dip slurry, pour sand, then dip slurry, and finally mold Shell air drying)---dewaxing (steam dewaxing)-------shell roasting--chemical analysis--pouring (pouring molten...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
