Metal Casting Zone Info Blog

Posts Tagged ‘Casting’

Aluminum Casting modern molding technology

Complex Aluminum Casting Casting is a form of electromagnetic pump low pressure casting technology at the core, aluminum smelting and molding compound purification technology and manufacturing core of new technology, producing high-quality Aluminum Casting modern molding technology. Electromagnetic pump low pressure die casting molten metal transfer system has a steady flow, flow control convenience, ease the process of pouring molten aluminum oxide in the inspiratory and easy to realize the advantages of process automation, which is used not only Foundry improve the quality of Aluminum Casting Foundry, but also can improve the working environment. Reduce labor intensity, realize the automation and modernization of foundry production.

Purification of molten Enamelware alloy casting is an important part of aluminum smelting and compound purification installations in addition to gas injection and spin foam ceramic filter with high outgassing and unless the performance of metal inclusions. In addition, it uses a new long-life lining material, and has independent thermal insulation / heating system can be used for a large number of continuous production, but also for the intermittent production. The technology of molten aluminum purification efficiency, long life and low cost effective, and easy to install, use and flexible. Casting Experience tells us that to solve the complex problems of quality Aluminum Casting in three main aspects:
(1) liquid aluminum smelting and melting,
(2) the smooth transfer of molten aluminum
(3) the size and stability of the mold and sand core process.

Core making process modeling can be seen on the casting quality and yield have a direct impact. Casting porosity, sticky sand, scarring, thermal cracking and surface quality, dimensional accuracy, the use of sand with the performance of a great relationship. Modeling and manufacturing of new technology is PEPSET core resin binder used for the original zirconium sand sand of a resin from the hard sand, hard sand of the kind of self-hardening mechanism of an independent, non-hardening chemical reaction initially, to be time to start hardening, curing reaction once started fast. So Coach Bags, since after a hard, high strength, fat gas collapsing small and has a good performance is the complexity of the casting surface to ensure the quality and stability of dimensional accuracy.

Related Die Cast Models Articles

The problems with iron foundries in China

The iron foundries are also known as iron casting workshops, which manufacture iron and steel castings. Many overseas buyers and purchasers always try to find the suitable iron foundries in China, so they can buy good iron castings from them. However, they do not know there are many problems with those foundries.

As my years experiences in Dandong Ruiding Foundry, I sort the iron foundries in China to four types. The first type: Large foundries. These foundries own over three automatic molding lines, and can produce over 10000 tons iron castings per year. The second type: Middle foundries. These foundries own one or two automatic molding lines, and other casting processes, such as resin sand, manual green sand etc. The annual production is from 3000 tons to 10000 tons. The third type: Small foundries. These foundries do not have automatic molding lines, but have some molding machines or just manual green sand casting process. The fourth type: specific foundries. These foundries just produce one or two specific products.

What are the problems with these foundries?

As for the large foundries, since they have many auto molding lines, so their production efficiency is very high, and the casting quality is very good. The problems are they can not make large castings, or heavy castings because of the size limitation of the sand boxes. In addition, they can not make some castings with special dimensional or structures requirements. Moreover, they are not willing to accept small orders. Therefore, most of these foundries will only produce the automobile parts.

As for the middle foundries, since they have automatic molding lines, and have other casting processes. They can meet many different demand. The problems are their technical abilities are limited, and their production costs are high. Why? These foundries were developed from traditional casting workshops, so they just start to use automatic molding line, therefore, their old engineers can not reach the new technical level. In one word, their old engineers did not know how to use the automatic molding lines. They are staying in the studying stage. At the same time, these foundries have to feed many engineers and administrative staff since they have many different workshops, and each workshop has different production processes. So, they production costs are higher than small foundries. According to the opinion of Mr. Galen Wang from Dandong Foundry, these foundries will develop into large foundries or small foundries in the future. The middle foundries are not a long-time stable stage.

As for the small foundries, since they just have manual casting process, so they can do it very well. They can control their production and administrative costs very low, and their prices are very competitive. The problems with small foundries are their production efficiency is limited. Since all castings are made by hand. They have no ability to complete large orders. Moreover, their quality is not stable. Therefore, they can just accept small orders, and produce the iron castings with low requirements.

As for the specific foundries, they only produce one or two types of castings. Such as some foundries only produce ductile iron pipes. Some just produce various pipe fittings. Some just produce very large castings, and some just produce stove parts. These foundries own the related equipments and rich experiences for their products, so they can make them very well. Their problems are they can not make other types of castings. Their engineers and workers are not willing to make other products because of higher defective rate and lower output.

All in all, I believe these problems are not the exclusive in China. All foundries in the world will face the same problems. I wrote this article to advise the buyers and purchasers how to choose the suitable foundries in China. There are many good foundries in China, who are maximizing their strengths, and trying to avoiding their problems.

This article was originally written by Mr. Galen Wang from Dandong Ruiding Founding Co. Ltd.

I’ve been trying to look for a tutorial online that teaches the proper way to encase insects in resin for jewelry and other things…..they are so neat to look at! However, I cannot find a step-by-step guide on how to do so (without someone saying its “cruel” or some ridiculous thing).

From the info I HAVE gathered, once you get your catalyst and resin mixed, you pour a thin layer and THEN place the bug down—-let it dry a bit—-and pour the rest over??? I also read something about needing to remove the air/oxygen from inside the bug before casting so it doesn’t rot?

Can anyone who HAS DONE INSECTS IN RESIN please tell me your experiences and the proper way to do so……and please save the “animal cruelty” crap for someone else…..don’t act like you wouldnt have killed the bug, anyways! LOL

P.S.—-I really want to resin a black widow spider……but I could assume that spiders may be more difficult to do given their thread-like legs. Any experience is greatly appreciated. Thanks!

Product Description
SAVE BY ORDERING THIS COMPLETE SET!! This complete set contains all items shown, vacuum caster with accessories, deluxe burnout oven, centrifugal casting unit, pyrometer, mixing bowl, timer, graduated cylinder, investment scale, dwt. Scale, non-asbestos gloves, 25 lbs. of investment, four 2-1/2″ x 3″ investment flasks, two 3-1/2 x 4″ flasks, sprue bases, borax flux, vacu-cast, jewelry cleaner and a casting book. Shipping weight is 222 lbs.

CASTING KIT WITH CENTRIFUGAL UNIT AND BURNOUT OVEN COMPLETE

Product Description
This text was developed for students, process engineers, and manufacturing engineers who wish to apply the quantitative fundamentals of heat transfer to the metal casting industry. This second edition includes the conversion throughout, to the more universally acceptable SI units. Considered to be a fundamental teaching book, the numerous examples throughout make it ideal for an undergraduate course in materials processing or manufacturing. The first two chapters review heat transfer and concepts pertaining to solidification. The middle chapters emphasize conduction heat transfer and casting solidification. Finally, the last two chapters show how heat transfer during solidification can be used in riser design and also supply an introduction to numerical methods for those students or casting engineers who wish to venture further.

Heat Transfer Fundamentals for Metal Casting, with SI Units

This is a demonstration on casting silver jewelry with a blast furnace on a mass production scale.

Product Description
All casting flasks are stainless steel and very durable. The matching sprue bases assure a leak-proof seal.

METAL CASTING FLASK STAINLESS STEEL 3-1/2″ DIAMETER X 2-1/2″ HIGH

VPC 040 – The most beautiful way to cast top quality jewelery. For more information see www.schultheiss-gmbh.de