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The testing times is a blogspot from Tinius Olsen. It is a record of some of the interesting custom made testing products and gripping solutions which the Design Engineers have developed within Tinius Olsen.

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Tinius Olsen - Testing in Education
3D Printed Products Testing PDF Print E-mail
Friday, 27 February 2015 08:41

3D printing has evolved from science fiction to science fact and promises to be an exciting and rapidly expanding market. 3D printing enables engineers to check the fit of different parts long before they commit to costly production; architects to show detailed and relatively low-cost scale models to their clients; and, perhaps most exciting, allows medical professionals to handle full-size, 3D objects printed from 3D scan data. There are also a wide range of educational uses. To date such products include automobiles, trainers, jewellery, plastic toys, coffee makers, and all sorts of plastic bottles, packaging and containers. Some dental labs have been using 3D printers to help create appliances for use in the creation of crowns, bridges and temporaries.

3D printing (also called Additive Manufacturing) uses successive layers of material which are laid down under computer control. The term's original sense refers to processes that sequentially deposit material onto a powder bed with inkjet printer heads. More recently the term’s meaning of the term has expanded to encompass a wider variety of techniques such as extrusion and sintering based processes and can use polymers or metals as the printed product.

As 3D products are becoming more common, one concern rises from the strength of the finished product and its ability to withstand tensile, compression, or impact forces of the real world applications. These properties are especially critical when they involve medical applications. To address this concern,  a recent start-up company has taken the proverbial bull by the horns and invested in an impact tester,  Tinius Olsen model  IT504, to ensure that the products they print can withstand the impact of daily life.

 
How foam testing helps Automotive Companies PDF Print E-mail
Friday, 27 February 2015 08:31

Foams are widely used in the automotive industry to prevent injuries to passengers in the event of a collision. The use of foamed material results in a significant improvement in the passive safety of the vehicle, owing to their excellent energy absorption and dissipation properties. Additionally, they are relatively cheap and allow great design flexibility, as they can be easily modeled in complex geometric parts. Typical applications include door panels, instrument panels, armrest, inserts, glove box, seat backs, pillars, consoles, knee bolsters, water shields, air ducts and boot covers.

Benefits of foam in automotive applications:

  • Product flexibility
  • Wide thickness range
  • Flame retardant characteristics
  • High property values at low densities
  • Special vacuum forming and press moulding characteristics
  • Thermal Stability

 

Foam being an integral part of human safety needs to be of efficient quality to sustain the damages. Compressive strength of foam is the most important factor which determines the sustainability of foam. One of the global players from eastern America has recently started using the Tinius Olsen H5KT machine to test the compressive strength of foams.

 
Grind drilling cement and mortars using Laboratory Ball Mill PDF Print E-mail
Monday, 23 February 2015 08:31

Cementing a well for drilling is the process of developing and pumping cement into a wellbore to protect and seal the wellbore, and also to permanently shut off water penetration into the well. Cementing can also be used to seal the annulus after a casing string has been run in a wellbore; to seal a lost circulation zone, or an area where there is a reduction or absence of flow within the well; to plug an existing well, in order to run a directional well from that point; and to plug a well when drilling has ceased.

Cementing is performed when the cement slurry is deployed into the well via pumps, displacing the drilling fluids still located within the well, and replacing them with cement. The cement slurry flows to the bottom of the wellbore through the casing, which will eventually be the pipe through which the hydrocarbons flow to the surface, and from there it fills in the space between the casing and the actual wellbore, and hardens. This creates a seal so that outside materials cannot enter the well flow, as well as permanently positions the casing in place.

Prior to cementing, it is critical to establish the amount of cement required for the job, which is done by measuring the diameter of the borehole along its depth, using a caliper log. Using both mechanical and sonic means, caliper logs measure the diameter of the well at numerous locations simultaneously to accommodate for irregularities in the wellbore diameter and determine the volume of the open hole. Additionally, the required physical properties of the cement are essential before starting any cementing operations. The proper set cement is also determined, including the density, viscosity and strength of the material, before actually pumping the cement into the hole.

Special mixers, including hydraulic jet mixers, re-circulating mixers or batch mixers, are used to combine dry cement with water to create the wet cement, also known as slurry. The cement used in the well cementing process is Portland cement, and it is calibrated with additives to form one of eight different API classes of cement which vary according to the different situations and conditions.

Additives can include accelerators, to shorten the setting time for the cement, or retarders, to make the cement setting time longer. In order to decrease or increase the density of the cement, lightweight and heavyweight additives are added. Additives can be added to transform the compressive strength of the cement, as well as flow properties and dehydration rates. Extenders can be used to expand the cement in an effort to reduce the cost of cementing, and anti foam additives can be added to prevent foaming within the well.

After casing, or steel pipe, is run into the well and an L-shaped cementing head is fixed to the top of the wellhead to allow the slurry to be pumped in. Two wiper plugs, or cementing plugs, that sweep the inside of the casing and prevent mixing are used and appropriately called the bottom plug and the top plug. Keeping the drilling fluids from mixing with the cement slurry, the bottom plug is introduced into the well, and cement slurry is pumped into the well behind it. The bottom plug is then caught just above the bottom of the wellbore by the float collar, which functions as a one-way valve allowing the cement slurry to enter the well. The pressure on the pumped cement is increased until a diaphragm is broken within the bottom plug, allowing the slurry to flow through it and up the outside of the casing string.

Once the proper volume of cement is pumped into the well, a top plug is pumped into the casing pushing the remaining slurry through the bottom plug. Once the top plug reaches the bottom plug, the pumps are turned off, and the cement is allowed to set. The amount of time it takes for the cement to harden is called thickening time or pump ability time. For setting wells at deep depths, under high temperature or pressure, as well as in corrosive environments, special cements can be employed.

A great deal of testing is performed prior to using any cement to ensure that the cement does have the correct strength, consistency and flow characteristics and failure to do so could result is substantial ‘down’ time or, even worse, a potential environmental hazard. The ‘fineness’ of the mixture is one of the major factors which affects the strength of cement and mortar and in materials processing a grinder is used to produce fine particle size reduction through attrition and compressive forces at the grain size level.

A typical type of fine grinder is the ball mill. A slightly inclined or horizontal rotating cylinder is partially filled with balls, usually stone or metal balls, which grinds material to the necessary fineness by friction and impact with the tumbling balls. To this end, a major supplier of technical products and services for petroleum and natural gas exploration and production has just bought a Laboratory Ball Mill from Tinius Olsen, to add to its numerous compression testers, also from Tinius Olsen, to grind cements and mortars into extremely fine powders.

 
Expanded Testing of Extruded Aluminum PDF Print E-mail
Tuesday, 27 January 2015 08:21

A major producer of extruded aluminum components for a broad range of automotive applications has just invested in another Super L hydraulic tensile tester. Aluminum offers benefits for superior predictability and reduced weight compared to other materials, and aluminum extrusions are perfect for applications such as:

  • Structural/Chassis
  • NVH
  • Impact Protection/Crash Management
  • Powertrain.

This company’s Quality Assurance system is built upon one primary principle: one defect is one too many. Their ISO/TS 16949 certified quality system includes stringent process controls and careful cross training of plant personnel and it also means that critical production data can be easily collected and organized for various quality assurance submissions including:

  • Tensile testing
  • Compression testing
  • Flare testing
  • Fold testing
  • FAI Reports
  • PPAP Reports
  • Capability studies

This commitment to superior quality programs is reinforced by their latest purchase of a Tinius Olsen 60,000lbf Super L tensile tester. The robust, repeatable and reliable performance of the model 60 Super L is a testament to the primary principle of their QA system.

 
PlastIndia 2015 PDF Print E-mail
Friday, 06 February 2015 09:11

 

Tinius Olsen with its Indian Distributor Aimil Ltd exhibits in the PlastIndia 2015 Show, February 5-10, 2015 at Gandhinagar, Gujarat, India. You can stop by the Tinius Olsen Booth # A08, our Regional Sales Manager for Indian Territory and Aimil Team will be happy to answer questions and demonstrate the Tinius Olsen equipment.


Tinius Olsen booth has MP1200, Video Extensometer and the brand New 5ST machine. 5ST is on display for Indian customers for the first time. People can experience the live demo on this Benchtop 5ST series machine. This 5kN electromechanical machine has advanced features with new controllers and various user friendly upgrades.

 

 
Charpy on Metal Pipes PDF Print E-mail
Thursday, 22 January 2015 08:44

Cast iron pipe has long been the standard material for conveying water and sewage in municipal, utility and industrial piping systems. The real life expectancy of cast iron pipe is unknown, but is usually estimated at 100 years or more. The oldest operating cast iron main is that at Versailles, France, installed in 1664. In North America there are more than 500 members of the Cast Iron Pipe Century Club, a unique organization composed of cities or utilities that have cast iron pipe still in service after 100 years.

Ductile iron pipe offers unique properties for conveying water under pressure, and other piping uses since it combines the physical strength of mild steel with the long life of gray cast iron. Ductile iron offers the greatest possible margin of safety against service failures due to ground movement and beam stresses. Virtually unbreakable in ordinary service, it also provides increased resistance to breakage caused by rough handling in shipping and installation. The corrosion resistance of ductile iron pipe has been proved in a wide variety of accelerated tests to be at least the equal of gray cast iron.

Ductile iron is produced by adding a closely controlled amount of magnesium alloy to a molten iron of low phosphorous and low sulfur content. These additions produce a remarkable change in the micro structure which results in a far stronger, tougher, and ductile material. In addition to the benefits of long life, corrosion resistance, high structural strength, and tight joints, ductile iron is also readily machinable, an important requirement in any pipe that must be drilled, tapped or cut.

To ensure that their ductile iron pipe consistently maintains its robust and extensive nature, a local established manufacturer in NJ has recently invested in a high energy Charpy impact tester from Tinius Olsen. This tester joins other Tinius Olsen machines in their labs as part of their continuing quality assurance testing regimen.

 
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