Printer Friendly
The Free Library
23,389,518 articles and books


Cores, cores everywhere: many metalcasters are swimming in inventoried cores, but certain strategies can help keep them afloat.

A midwest metalcasting facility received a software tool in late 2007 that would eventually streamline its disorganized dis·or·gan·ize  
tr.v. dis·or·gan·ized, dis·or·gan·iz·ing, dis·or·gan·iz·es
To destroy the organization, systematic arrangement, or unity of.
 core room. But some of the employees in the shop felt as if the tool were an anchor dragging them down when it first bobbed into the facility.

The company had implemented a new enterprise resource planning See ERP.

(application, business) Enterprise Resource Planning - (ERP) Any software system designed to support and automate the business processes of medium and large businesses.
 (ERP (Enterprise Resource Planning) An integrated information system that serves all departments within an enterprise. Evolving out of the manufacturing industry, ERP implies the use of packaged software rather than proprietary software written by or for one customer. ) system, which meant completely overhauling the plant's existing databases and recordkeeping. The company is still refining and developing the complex system, and management suspects that the long process has been a drag for the metalcasters.

Today, management believes the employees at the plant must feel like they were thrown a life preserver life preserver, a personal flotation device (PFD) intended to keep the wearer afloat, particularly in case of shipwreck. A Type I PFD will keep even unconscious people afloat in a face–up position; it is the most common type used at sea. . It's difficult to say whether the installation of the new resource planning Resource planning may refer to:
  • Enterprise resource planning (ERP)
  • Manufacturing resource planning (MRP and MRPII)
  • Distribution Resource Planning (DRP)
  • Human resources (HR)
 system has been a success or not; the company decided to implement it to update their 20-year-old, homemade home·made  
adj.
1. Made or prepared in the home: homemade pie.

2. Made by oneself.

3. Crudely or simply made.

Adj. 1.
 resource planning software, not to accomplish any predetermined pre·de·ter·mine  
v. pre·de·ter·mined, pre·de·ter·min·ing, pre·de·ter·mines

v.tr.
1. To determine, decide, or establish in advance:
 goals. But by at least one measure, the facility is now operating more efficiently. When one of the company's vice presidents used to walk through the plant, he saw a facility that was storing too many inventoried cores, which can lead to lost orders, cores that are never used, broken cores, and an inefficient use of floor space. The plant no longer has these problems.

According to according to
prep.
1. As stated or indicated by; on the authority of: according to historians.

2. In keeping with: according to instructions.

3.
 the executive, who requested that his name be withheld, the metalcasting facility has reduced core inventory by 33% to 50%. The employees think they can improve further. Because the plant is now manufacturing cores to meet molding needs rather than running the core room as its own entity, the vice president said the difference is visible when walking through the plant.

[ILLUSTRATION OMITTED]

According to several metalcasting consultants, the facility in this story is not an island. Because the core room has to keep up with the rhythm of melting and molding, many facilities suffer from similarly excessive core inventories. Fortunately, installing a company-wide ERP system isn't the only solution. In fact, it's not even a solution in and of itself. The system merely provides a tool that can be used with the proper training and management techniques.

[ILLUSTRATION OMITTED]

"It's really scheduling, organization, planning and execution," said Peter Macler, president of Peter E. Macler Associates PLLC PLLC Professional Limited Liability Company
PLLC Polk Life and Learning Center (Bartow, FL)
PLLC Partners of Limited Liability Corporation
, Canyon Lake, Texas This article is about a census-designated place. For the reservoir of the same name, see Canyon Lake (Texas).
Canyon Lake is a census-designated place (CDP) in Comal County, Texas, United States. The population was 16,870 at the 2000 census.
. "It's training the people on the floor to maintain the organization of the cores in the system. If you can eliminate those wastes, there will be fewer cores scrapped and less unnecessary work in process, so costs will be reduced, quality will go up and there will be fewer interruptions. There are plenty of upsides upsides
Adverb

Informal, chiefly Brit (foll. by with)equal or level with, as through revenge
."

Scheduling

ERP systems like the one at the unnamed plant are updated, computerized versions of the order tracking systems metalcasting facilities have been using for decades. Macler said that some type of resource planning system is necessary for successful scheduling of cores.

"Order entry systems that will handle the breakdown of work, routing and workstation loading will tell you if you have enough core capacity on such and such a day to maintain the production you need," he said. "If you have tools to help you with that, scheduling becomes a bit easier."

But for job shops, proper scheduling can sometimes feel more like walking on water than a walk in the park. When you're shifting between a half dozen different part numbers on any given day, you have to be at least slightly ahead of the curve in order to keep production flowing.

[ILLUSTRATION OMITTED]

"We try to have the next week's production mapped out, but it doesn't always work 100% correctly," said Jerry Monroe, project manager for General Motor's Saginaw Metal Casting Metal casting

A metal-forming process whereby molten metal is poured into a cavity or mold and, when cooled, solidifies and takes on the characteristic shape of the mold.
 Operations, Saginaw, Mich. "Typically, we plan at least three days in advance and try to maintain two days between making a core and running it."

For example, Monroe said his plant might be running 70% of part A and 30% of part B one week, only to have the volumes flip flop FLOP - 1. An early system on the IBM 701.

[Listed in CACM 2(5):16 (May 1959)].
 the following week. Because his schedules aren't hard and fast, he simply can't make cores to order, or just-in-time.

If the central goal in streamlining the core room is to minimize the number of cores you produce in excess of what you are molding, but letting your bank of cores sink too low means you risk inflicting a drought on molding and melting (a costly stoppage stoppage - /sto'p*j/ Extreme lossage that renders something (usually something vital) completely unusable. "The recent system stoppage was caused by a fried transformer."  for any metalcasting facility), how far are you willing to go to keep your plant from being flooded with cores?

To answer this question, job shops can at least take a cue from high production shops, which for the most part can afford to let their core excesses sink a little lower. Those shops have a better understanding of what they will need and when.

"We took the core right out of the machine, processed it, and set it in a fixture to take it to the molding line and set it in the mold," said Norris Luther, president of metalcasting consulting firm Noun 1. consulting firm - a firm of experts providing professional advice to an organization for a fee
consulting company

business firm, firm, house - the members of a business organization that owns or operates one or more establishments; "he worked for a
 Luther and Associates, Tucson, Ariz., and a former manager at a high-production automotive facility. "That meant that we didn't have very much of a bank and never went into a big surge."

Handling and Storage

When it comes to handling in any metalcasting application, less is always more (both for minimizing labor and breakage), so Macler suggested maintaining your core room as close to your molding line as possible. Melting and molding generally already hold a permanent place in the facility. The location of the core room, on the other hand, sometimes can be adjusted to minimize the transfer distance from core room to molding line. Monroe said this strategy works well for the green sand line at Saginaw Metal Casting Operations.

"They're back to back, right beside each other," he said.

Monroe's plant also meticulously organizes its excess cores once they are produced. "Our cores are all stored on color coded Noun 1. color code - system using colors to designate classifications
code - a coding system used for transmitting messages requiring brevity or secrecy
 racks by part and core type," he said. "For visual control, you know which core is in which row. We store each type of core no more than eight racks deep and double stack the racks."

Macler said all shops should attempt to store cores in such an organized and systematic way, with small cores on racks and large cores in preset preset Cardiac pacing A parameter of a pacemaker that is programmed permanently when manufactured  locations on the floor of the facility. The storage location ideally should be as close to the molding areas as possible; however, the problem in many shops is that the space required for storage has not been set aside in the first place.

"You have to have sufficient floor space to organize the cores," Macler said. "That's not having 100 sq. ft. over here and 200 over there and kind of a quilt effect."

The shelf life of cores also should be taken into account. Macler said shell cores will keep almost indefinitely, but coldbox cores can pick up moisture from the air within a week if they are not stored in the proper conditions.

"Unless you have a room with controlled humidity, you are going to get more scrap because you soak in moisture or you dry out the core too much," Luther said. "You have to have a controlled storage room."

Execution

A disorganized core room often is indicative of a larger, organizational concern.

[ILLUSTRATION OMITTED]

"It's usually a bigger problem than just the core room," Macler said. "If you walk into a [metalcasting facility] that has a disheveled core room, you're likely to find that throughout the rest of the shop. It is a matter of the total organization and dedicating floor space to certain activities and training people to repeatedly update and retain the quality of an organized system."

The core room workers at Kirsh Foundry Inc., Beaver Dam Beaver Dam, city (1990 pop. 14,196), Dodge co., SE Wis., on Beaver Dam Lake, in a productive farm and dairy area; inc. 1856. Industries included food processing, metal and metal products fabrication, printing, and machinery manufacturing. , Wis., were guilty of being part of just such a larger concern. They were tricking management.

"You'd find out cores you needed tomorrow wouldn't be ready," said Jim Kirsh, company chairman. "But shell cores you would need two weeks from now would be in finished production." The core room had been purposefully pur·pose·ful  
adj.
1. Having a purpose; intentional: a purposeful musician.

2. Having or manifesting purpose; determined: entered the room with a purposeful look.
 performing the jobs that were easier or more lucrative in order to cheat the system and keep Kirsh Foundry from operating as efficiently as possible. But Kirsh and his brother Steve, the company's president, had an ace up their sleeve. They were already using a tried and true method of improving their overall business one process at a time--bringing in Engineered Foundry Systems, St. Louis, Mo., to help reduce material handling.

"You just don't realize how much time you waste handling material, within a department and between departments," Jim Kirsh said. "The process template applies to almost everything. You can overlay (1) A preprinted, precut form placed over a screen, key or tablet for identification purposes. See keyboard template.

(2) A program segment called into memory when required.
 it on shakeout Shakeout

A situation in which many investors exit their positions, often at a loss, because of uncertainty or recent bad news circulating around a particular security or industry.

Notes:
During the dotcom boom and bust, numerous shakeouts occurred.
, the finishing room and the core room."

In the case of the Kirsh Foundry core room, EFS EFS Encrypted File System (Microsoft Windows 2000)
EFS Event Free Survival (survival rates in clinical trials)
EFS Evangeliska Fosterlandsstiftelsen (Sweden) 
 first looked at the number of employees involved in the production of cores. Several operators were required to work each core machine, but by grouping similar core machines in close proximity (shell with other shell, coldbox with other coldbox), one operator was able to work several machines.

Next, the team focused on the various operations required to produce completed cores. The metalcasting facility had in the past moved the cores in batches from station to station--blowing to filing to coating--placing them in boxes before passing them on. Kirsh Foundry installed an 80 ft. conveyor belt conveyor belt

One of various devices that provide mechanized movement of material, as in a factory. Conveyor belts are used in industrial applications and also on large farms, in warehousing and freight-handling, and in movement of raw materials.
 to eliminate this problem. The cores now are blown, placed on a conveyor belt, shuttled to filing, returned to the belt, and so on. They are not put into a batch until they go to the staging area staging area
n.
A place where troops or equipment in transit are assembled and processed, as before a military operation.

Noun 1.
 prior to being inserted at molding.

Kirsh admits the core room at his job shop will never flow continuously into molding. But because the company is now making cores faster than they ever had, they produce a smaller bank of cores before going into the staging area.

"The staging area is a small room, and I [told the core makers], that's all the space you have," Kirsh said. "If that space is filled, you're producing too far ahead. Now, we produce only about three days ahead. It's closer to an adjusted time operation than a batch style finished production operation."

What's more, the conveyor Conveyor

A horizontal, inclined, declined, or vertical machine for moving or transporting bulk materials, packages, or objects in a path predetermined by the design of the device and having points of loading and discharge fixed or selective.
 system helps the company maintain a first-in-first-out coremaking operation, and the employees can no longer trick management by opting to do certain jobs out of order.

"It was a relatively inexpensive investment in our core room to get a big return on our labor savings," Kirsh said.

For More Information

"The Choice Is Cores," S. Kruse, MODERN CASTING, February 2007, p. 29-32

Shea Gibbs, Senior Editor

Spending the Big Bucks

Capital investments also can help you get your core room ahead. Modern core machines are faster than their predecessors and generally offer improved rates of tool change. According to Norris Luther, president of Luther Associates. Tucson. Ariz.. installing a new core machine with elevated capacity can in some cases be a viable solution for a company that can't produce cores fast enough.

"You have to have a good study of it and determine what value it's going to have and what your production is going to be," he said.

Jerry Monroe. project manager for General Motor's Saginaw Metal Casting Operations. Saginaw. Mich.. agreed that modern core machines can make the best of the sticky situation that is core stockpiling stock·pile  
n.
A supply stored for future use, usually carefully accrued and maintained.

tr.v. stock·piled, stock·pil·ing, stock·piles
To accumulate and maintain a supply of for future use.
 in the job shop.

"On some of our machines, we've gone to a quick tooling change operation." he said. "That helps a lot in turning a core machine over. The [changeover (programming) changeover - The time when a new system has been tested successfully and replaces the old system. ] used to be two to four hours, and now they're down to less than ten minutes for the tool itself. In as little as half hour, we can be making the next core."

[ILLUSTRATION OMITTED]
COPYRIGHT 2009 American Foundry Society, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2009 Gale, Cengage Learning. All rights reserved.

 Reader Opinion

Title:

Comment:



 

Article Details
Printer friendly Cite/link Email Feedback
Author:Gibbs, Shea
Publication:Modern Casting
Date:Feb 1, 2009
Words:1944
Previous Article:6 Rules for better abrasives use: following these rules of thumb may keep your grinders from losing one.
Next Article:Protect your permanent molds: wear of permanent molds can lead to dimensional inaccuracy, poor casting surface quality and cracking. This article...
Topics:

Terms of use | Copyright © 2014 Farlex, Inc. | Feedback | For webmasters