Aluminum Die Casting Parts Draft Angle – Draft Angle in Die Castings When someone asks me “what is draft angle in a box?” or “why do I need a draft angle on my aluminum die casting box part?” The technical …
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Tag Archives: Casting Metal
Thicker Die Casting Walls, Stronger Part, No
Kinetic Die Casting Company has helped many customers develop new products. There are many factors singular to the die casting process that are needed to consider such as product strengths, draft angles, gate areas, material types, material flow, slide features, undercuts, and wall thicknesses.
Over the years, I have had to convince several buyers, engineers, and designers that increasing the thickness of the walls or other sections in a die casting part does not increase the part strength. In fact, it does the opposite. As the molten metal is injected through the gate, into the die casting mold, the metal freezes on the wall surfaces of the die on the die casting part exterior and interior. The metal contacting these die surfaces is denser and harder than the section sandwiched between the two wall surfaces.
The first .030” to .050” surface of the casting where the metal is denser is commonly called the “skin” of the die casting. The die casting skin is on both interior surfaces and exterior surfaces. The material between the two skin surfaces is weaker and less dense. A part that has a wall thickness of .080” would have a skin surface of about .060”, on the interior wall .030” and the exterior wall .030”. The section sandwiched between the two skins, approximately .020” would provide little strength.
Die Casting parts should not typically be thicker than .125”. On die casting parts with thicker walls than .125”, the increased thickness decreases the wall strength by increasing opportunities for porosity, shrinkage and laps. Parts that will be machined should only have less than .030” removed to preserve more of the die casting strength and to avoid exposing porosity.
When it comes to increasing strength in aluminum die casting parts, other methods are used. I will detail how to strengthen die casting parts in future articles.
Contact Kinetic Die Casting Company 800-524-8083, if you have a metal product that you are considering manufacturing. We will evaluate your design and make suggestions on other metal manufacturing processes when necessary. If die casting is the best option, we will assist you in material selection, tooling manufacture, and provide the cost for tooling and die casting parts.
Kinetic Die Casting manufactures custom metal parts to their customer. If you would like more information about Kinetic Die Casting, please visit our website:Kinetic Die Casting Company
The Advantages of Cast Aluminum Parts for Music over Plastic Parts
The Advantages of Cast Aluminum Parts for Music over Plastic Parts. For serious musicians and the musical professionals in the music industry, having instruments that last longer, that sound extraordinarily good, and that are strong and sturdy is very important. Guitar amplifiers, for example, should be able to produce sound as clearly and stable as they can, which is why many manufacturers of amplifiers are now going for aluminum casting for parts. Aluminum castings are normally sturdier and are able to produce sound better than plastic, plus it is easier to shape and quick to produce in numbers. Though plastic is cheaper when it comes to production costs, aluminum casting parts for music last longer, can be shaped into all kinds of complex shapes to make it fit and function better, and it isn’t expensive as well.
But because sound and how guitar amplifiers produce the kind of music certain musicians are after are some of the top priorities when choosing guitar amps, there is still the want for vacuum tube amps despite their heavy weight and constant tuning and annual maintenance. Guitarists for genres such as the blues and rock prefer the sound produced by these vacuum tube guitar amps, but thanks to the advancements in technology even today’s guitar amplifiers can emulate sound that of classic guitars almost perfectly.
Kinetic Die Casting manufactures aluminum and zinc die casting parts. Samples of KDC’s work include die cast speaker parts, aluminum tile plates, and other die cast metal parts. If you would like to have a quote please visit our website: Kinetic Die Casting Company
World Energy Consumption Increased by 60 Percent during the Last 26 Years
World energy consumption increased by 60% during the last 26 years. Energy use in the U.S. increased by 81% during the same time period and continues to increase every year with new gadgets and appliances that require electricity to function. The U.S. is now competing with emerging economies, such as China and India, for energy resources. Along with the demand increase, prices are increasing, too. Requirements to reduce greenhouse gas emissions are pressuring utilities to find alternate sources of supply. These costs will be added to the system. There are many ways to reduce energy use, thereby decreasing total energy costs and becoming more environmentally sensitive. World Energy Consumption Increased by 60% during the Last 26 Years.
Kinetic Die Casting manufactures die casting metal parts creating products like roofing tile molds, lighting parts, and military parts. If you would like more information about Kinetic Die Casting, visit our website:Kinetic Die Casting Company
Metal parts suppliers seize up
By Tom Stundza — Users of metal parts went into a buying funk last summer when the manufacturing recession bloomed. Purchasing activity fell further this spring when the domestic auto industry imploded. What’s ahead? Buyers say they plan no immediate pickup in bookings. Only 20% of metallics buyers plan to boost purchasing in the near future. So, less than 9% of the buyers of castings, forgings and other parts see price increases anytime soon.
The Institute of Supply Management now expects a 22.7% plunge in capital investment for U.S. factories this year, more than three times worse than its previous projection issued in December of a 6.7% decline. And, since they have severely downgraded their projections for economic activity and investment during 2009, metal parts industry executives are adjusting operations and employment to keep their heads above water and also now are discussing a “leaner supply base” when the pickup in demand finally occurs.
Durable goods manufacturing should see the brunt of the contraction this year, with a drop of 16.8%, forecasts economists Tom Runiewicz at the IHS Global Insights offices in Eddystone, Pa. So, early forecasts suggest an 18% decline in cast metal parts at 10.2 million tons in 2009. When powder metal parts and forgings are added to the mix, the 12.89 million-ton market will be 31% below the cyclical peak year of 2007 when sales were 18.59 million tons.
The lack of capital goods manufacturing growth in the later months of 2008 and this year has stunted the purchasing of key metal parts. In terms of dollars, purchasing in the engineered-components marketplace jumped by about 16% to $50 billion, mostly because the steel price spike that inflated the cost of forgings and some ferrous castings. This year, the dollar volume could fall by as much as 11% to $45 billion—partly because of reduced tonnage and partly because of deflated costs of metallics.
Note that after two straight years of an average of 10 weeks for deliveries, leadtimes slipped to an average 9.4 weeks in 2008 and are sliding toward 7 weeks so far this year. A series of buyer surveys finds that none of these products are delivery hot buttons so far this year. Ken Kirgin of market researcher Stratecasts Inc. in Ft. Myers, Fla., isn’t surprised, noting that most end-use sectors “are experiencing losses in demand” for iron, steel and nonferrous metals castings, noting that poor sales have gone beyond automotive and housing starts.
And looking forward, economists now believe the metal casting, forging and sintering industry won’t match 2007–2008 tonnage and sales volume for two or three years. And that may end up shrinking the supply base, a probable shakeout among the makers of cast, forged and metal sintered components. “We probably will lose around 100 of the nation’s 2,130 metalcasting shops, and 300,000 to 400,000 annual tons of the industry’s current 14.6 million tons of annual capacity,” says Alfred Spada, director of marketing at the American Foundry Society in Schaumburg, Ill.
Just last month, Elmira Pattern & Foundry in Elmira Heights, N.Y., an 80-year-old specialist in aluminum castings, halted production and is going out of business, a victim to the economic slowdown. Die caster Quad City Die Casting of Moline, Ill., will close permanently three plants on July 12. Quad City’s main plant (aluminum and magnesium castings) is in Moline and it also has plants in Red Oak, Iowa (aluminum and magnesium) and Davenport, Iowa (zinc die castings). These parts range from 5–20 lbs.
In an interview, Spada says he isn’t surprised at these events, noting that “the typical metalcasting firm saw business start to slide last autumn with activity bottoming out in the February-March timeframe of this year.” That’s because almost a third of the supply base ships into automotive, which has been a disaster, with big purchasing declines also evident from manufacturers of heavy trucks, railroad cars, agricultural equipment and various off-road vehicles and machines.
Note that a major player in the production of aerospace and industrial forgings, castings and fasteners, Precision Castparts Corp. of Portland, Ore., says it “faced strong headwinds” in its fiscal fourth quarter ended March 29 where its net income fell 6.7% to $260.3 million from $279 million a year earlier on sales that slid 9.2% to $1.6 billion from $1.77 billion. CEO Mark Donegan says operating earnings by its forged products business were down 12.1 % to $162.2 million on a 16.3% decline in sales to $678 million, while operating earnings by its investment cast products business slipped 1.1% to $143.4 million on a 6.7% drop in sales to $540.1 million.
In this environment, “castings prices have come down dramatically this year,” says a buyer in Springfield, Ill. That’s also true for other metal parts since their prices are dependent upon the market prices for the metal mill products, which has come off the mid-2008 spike to cyclical lows in early 2009.
“Indeed, these are challenging times that are forcing die casters to make tough business and financial decisions to endure,” says Daniel L. Twarog, president of the North American Die Casting Association (NADCA) in Wheeling, Ill. “While some die casters have seen an increase in business activity due to sourcing returning to the U.S., a larger number still need to weather the demand downturn.”
The current state of U.S. die casters is very precarious, says Twarog in an interview, who agrees that a smaller, more agile supply base will emerge from the recession. That’s because the current downward purchasing trend will continue through 2009 and probably halfway through 2010. This also is the outlook of Richard Pfingstler, president of the Powder Metallurgy Parts Association in Princeton, N.J. “I’d love to say that business will turn around in the fourth quarter of this year but we’ll be lucky to see the bottom at that time.”
Pfingstler, who also is president of Atlas Pressed Metals in DuBois, Pa., adds: “It’s no secret that the biggest user of powder metal parts is the automotive industry, and it’s no secret that its purchasing has been down for months.” Weak sales to General Motors and Chrysler and the prolonged American Axle strike in the first half affected early 2008 sales, followed by the steep decline in overall automotive assembly by all producers in the second half. The latest blows to metal parts suppliers in 2009 have been the nine-week assembly shutdown at half of the North American plants of General Motors and that firm’s decision to phase out the Pontiac brand. Also: The bankruptcy of Chrysler that has shut its plants for at least two months, pending completion of the proposed sale of principal assets to a new company as part of its bankruptcy proceedings.
Metals parts makers also are seeing sales drop this year because of the reduced activity by producers of heavy trucks and off road vehicles and the reduced manufacturing of oil and gas drilling equipment and petrochemicals industry machinery. Kirgin at Stratecasts says other business-depressing factors include the expected drop-off in medium to heavy truck and trailer production to about 190,000 units this year and a 40,000-unit slide for railroad freight cars.
Meanwhile, IHS Global Insight analyst Kenneth Kremar in New York says “traditional manufacturing is having a rough time, as consumers rein in spending, corporate America cuts capital spending, and export markets falter as the global recession deepens.” Upshot: Traditional manufacturing, a key market for metal parts, is slated to contract by 11.7% this year. Looking at the production of industrial machinery, which fell 14.6% in 2008, Kremar says assembly is slated to drop an additional 23.2% this year. Production of construction machinery is now slated to decline 26.2% in 2009.
In this economic environment, steep declines already have been recorded in the early months of 2009 for powder metal parts sales, which dropped by an estimated 8% to 10% in 2008. “The market has been as weak as feared,” a metal powder supplier writes to clients. “Demand for finished products made of our powder was very low.” Moreover, weak demand in late 2008 means that inventories have remain unusually high, cutting into sales of new powders.
Pfingstler says in an interview that 70% of the sales of the 100 or so powder metal parts firms are auto-related. But, if anything, this recession has proven that non-automotive markets aren’t recession-proof, either. He cites reduced shipments to makers of lock hardware, garden tractors, snowmobiles, power tools, appliances, cell phones, sporting arms, oil and gas equipment, aircraft engines and surgical equipment. This matches with a report from Kremar at Global Insight that farm-sector capital spending will drift down over the near term and lawn and garden equipment will not rebound until housing turns the corner. He projects that production of farm and garden equipment is slated to decline 10.2% this year.
“Castings from China are past due,” reports a procurement executive at a Wisconsin firm that manufactures door securements for truck trailers, specialty trailers, and intermodal containers. Twarog of the NADCA believes these kinds of reports will “bring good news on the horizon” for the die-cast parts industry as well.
A survey of his trade group’s membership found 78% reporting business coming back from overseas during the last two quarters. Why? “Three main reasons,” he says in an interview, “concerns about part quality, fewer late deliveries because of the close proximity of customers and regional suppliers, and the cost disadvantage of overseas logistics.”
Stroh Die Casting in Milwaukee, recently has been seeing interest from original equipment manufacturers (OEMs) wanting to bring some components back because of offshore quality issues. “One company has talked to us about bringing some parts back — particularly plated or painted parts,” says Andy Stroh, sales manager. Also, “poor packaging results in parts getting damaged during shipment.”
Stroh Die Casting has been tooling up an aluminum die-cast part that previously was made in China for a customer in Green Bay, Wis., “The customer had quality issues with the part and difficulties relaying part changes effectively,” says the sales manager. “That’s why we got the work—because of our proximity to the customer, understanding of their needs and our willingness to build the new tool quickly.”
Chicago White Metal Casting in Bensenville, Ill., won back some business because of both offshore quality issues and proximity to their customer, says its president, Eric Treiber. “We have, within the last year, produced castings that were previously sourced offshore,” he says. “It is our understanding that two magnesium castings we produce, which were previously sourced offshore, were brought back to the U.S. for reasons of quality and proximity of the supply base.”
Twarog says in a press release that manufacturing logistical issues with offshore sourcing have become more prevalent. “The simple fact is that the distance between OEMs and their offshore suppliers makes it too costly and time-consuming for them,” he explains. “Also, heightened shipping costs and longer cycle times reduce, and in some instances negate, the cost savings of sourcing offshore.”
In a NADCA white paper, member Burl Finkelstein says his company, Kason Industries in Newman, Ga., recently brought back about 500,000 zinc castings that were made in China. “This occurred for several reasons,” he says. “Metal costs fluctuated in China, and suppliers would not take orders at prices that had previously made them competitive. Adding increased transportation costs, you can see how the trend changed. At our plant, we remained tooled and had machine capacity at our U.S. plant to be able to absorb the work without any capital outlay.”
In the white paper, Mel Hand, general manager of Los Angeles Die Casting in Commerce, Calif., says his high pressure aluminum die castings house has taken some engineering and fabricating initiatives to become a supplier of choice to its regional customer base. “As issues arise, we are better positioned and better equipped to offer engineering support,” he says. “Not only can we turnaround a part quicker, but we can produce a better quality part.”
Kinetic Die Casting is a Los Angeles die casting company that manufactures aluminum and zinc parts. If you would like more information, please visit our website:Kinetic Die Casting Company
Thousands of Metal Casters Lose Jobs
As it turns out, the deconstruction of General Motors’s extended web of suppliers has been underway for months. With a bankruptcy filing, it’s likely to accelerate, costing thousands of workers their jobs and likely destroying dozens of firms.
Chris Norch, president of Denison Industries, employs 125 employees in a metal casting business founded in 1991. It supplies aluminum castings for the automotive, defense, aerospace, and commercial industries. He’s also president of the American Foundry Society, which represents about 3,000 metal casting firms, the majority of which are family owned and employ an average of 100 people or fewer.
He told the House Small Business Committee recently that GM and Chrysler, which already has filed for bankruptcy, owe their large and small suppliers about $10 billion for parts that have been delivered. GM has held off paying them for weeks. In bankruptcy, GM may not have to pay them at all.
In the past six months, 15 metal casting companies have closed down, and the trade association estimates that another 30 could close their doors over the next six to nine months.
Ron Overton, chief executive of Overton Industries, a company his father founded in 1968, has seen similar fallout among so-called second-tier suppliers. In his case, they make machine tools for companies that make auto parts. “In my 30 years in this industry, these times are by far the most dire for the automotive sector and particularly the thousands of small middle-market suppliers around the country,” he told the committee during a recent hearing.
His company is holding several million dollars in receivables from direct suppliers to GM and Chrysler and he’s worried about getting paid. Although the Obama administration has insured GM and Chrysler receivables to direct suppliers, companies like Overton have little recourse in the event of a GM bankruptcy.
“In the current environment, these accounts receivables remain open for a longer period of time than ever before,” he said. Some companies in the administration’s Supplier Support Program funded under the Troubled Assets Relief Program (TARP) are withholding payments for up to 180 days, even though they are receiving payments from GM and Chrysler in less than 60 days.
Because of the impact on cash flow, small middle-market auto suppliers say the doors are being slammed shut on credit. “The moment a lender or receivables insurance broker sees we are involved in the automotive industry, they immediately move us to a high-risk category, will not extend credit, or they will transfer us to a third-party lender,” said Overton. “Simply put, they believe we are not ‘bankable’ due to our auto industry work.”
Kinetic Die Casting manufactures aluminum die castings creating aluminum die casting boxes, aluminum handle hardware, and aerospace die casting. If you would like to get a quote, please visit our website: Kinetic Die Casting Company