Testing Instruments in Namibia

How Does Tensile Testing Machine Work?

The Presto Tensile testing Machine is highly recommended for evaluating the tensile strength of products and materials. The equipment is based on the Constant Rate of Traverse (CRT) principle. It is equipped with an upper jaw and a lower jaw.

While the upper jaw is stationary, the lower one can be moved at a designated fixed speed with the help of a motor. The test specimen is held between the two jaws. The lower jaw is gradually made to move to evaluate the tensile strength of the sample.

The motor is equipped with a gear Box and a lead screw arrangement. The machine also incorporates a special sensor, connected with a load cell. The sensor is capable of judging the load exerted on the stationary jaw and directly indicating the reading in kgs (in digital format).

There are special case hardened lead screws which ensure stability and durability. It incorporates a standard branded motor and CE standard electrical wiring. The completely modular construction of the Presto Tensile Testing Machine ensures trouble free maintenance and easy operation.

Presto Tensile testing Machine is highly stable machine, built using heavy mild steel. Its strength and high quality can be attributed to the various built in safety arrangements, such as over load and over travel protection.

The Presto Tensile testing Machine has an Autumn Gray & Blue combination finish and bright chrome / zinc plating has been added to impart a corrosion resistant finish.

The Instrument comes complete with Instruction Manual; Electrical Wiring Diagram & Calibration Certificate traceable to NABL approved Labs.

Benefits of Peel/Seal/Bond and Adhesion Strength Tester

Presto Adhesion Strength Tester is used to quantify the permanence of adhesion or peel ability of self- adhesive pressure sensitive materials. Peel adhesion is defined as the force required for removing a pressure sensitive coated material, which has been applied to a standard test plate under specified conditions, from the plate at a specified angle and speed. Presto Adhesion Strength Tester is strictly manufactured as per ASTM standards and is highly recommended for use in the plastic packaging industry.

The Presto Adhesion Strength Tester is built on a rigid metallic base plate and finished in Autumn Gray & Blue combination painting, the instrument has a bright chrome / zinc plating to give it a corrosion resistant finish. The tester comes complete with Instruction Manual; Electrical Wiring Diagram & Calibration Certificate traceable to NABL approved Labs.

Benefits of Heat Sealer Machine

Heat Sealer Prima is a consistent tool used to perform sealing on flexible packaging products and other thermoplastic materials using pressure and heat by maintaining high temperatures.  A heat sealer is used to measure the heat seal performance of composite films, plastic films such as PP, PE used in packaging different food products such as milk powder, instant noodle, food, washing powder, and drugs.

The Presto (Pneumatic Model laboratory) Heat Sealer is widely used in the plastic industry. The temperature of the Presto Heat sealer is also adjustable. The instrument has been provided with Digital Display and is Microprocessor based.

Both the upper and lower jaws of the Presto Heat sealer are heated separately with separate temperature sensors and controllers. Thus, it is possible to maintain both jaws at different temperatures. It is even possible to switch off one heater, while keeping the other on.

Benefits of Melt Flow Index Tester

Presto Melt Flow Index tester is fitted with a Microprocessor based PID Temperature controller, with a temperature range from ambient to 400°C. It has a resolution of 0.1°C and an accuracy of ± 0.1°C. The instrument incorporates a digital presettable timer with a range of up to 59 minutes; 59 seconds and buzzer output. The provision of automatic sample cutting ensures the accuracy and smooth operation.

The equipment is built on a rigid metal base plate to ensure stability during operation. The Presto Melt Flow Index tester is finished in Autumn Gray & Blue combination painting. Further, a bright chrome / zinc plating has been added to impart a corrosion resistant finish. The Instrument comes complete with an instruction manual; Electrical Wiring Diagram & Calibration Certificate traceable to NABL approved Labs.

The Presto Top Load Tester gives the compressive buckling load in digital format. This is a fully automatic motorized model. The Digital display of the Digital Top Load Tester is aesthetically appealing and sophisticated. Further the display is easy to read out and has been provided with Auto Tare (ZERO) set facility and Peak Hold arrangement.

This New Generation fully Automatic Motorized Top Load Tester gives the compressive buckling load in digital format.  The load sensor can be calibrated in-house. The bottle needs to be placed in between the inverted concave jaws for zero slip gripping. The Operator switches off the machine on viewing buckling in the Pet bottle.

Top Load Tester is designed to provide Compressive buckling load. The instrument is used for testing the load bearing capacity of the PET containers when subject to an extreme load from the Top direction. It determines accurately the maximum load a PET container can bear without any deformation or failure.

Applications:

• For compressive buckling load in digital format in PET bottle manufacturing plant

Presto’s Hot Wire Bottle Cutter is a widely used instrument in PET bottle industries. PET bottles are mainly used for packaging of various products such as carbonated drinks, food items and so forth. They are also used for packaging of chemical. The shape and size of the bottles is important for the better safety of the products that are packaged in the bottles. For the best shape and size, it is important to test the weight of every section of the PET bottles individually. This process is called the section weight analysis. For accurate section weight analysis, the individual sections of the PET bottles need to be cut properly and precisely without causing any deformation in the shape of the bottle. The Hot wire Bottle cutter helps in this testing procedure of the PET bottles.

The Presto’s Hot Wire Bottle cutter NXG is designed to easily cut the individual sections of the PET bottles. The capacity of the bottles that can be cut using the instrument ranges from 200 ml to 2000 ml. the maximum diameter of the bottles that can be cut with the hot wire bottle cutter is 110 mm. Each section of the bottles is cut in exact dimensions and not deformation occurs in the shape and size of the bottles during the cutting. After accurate cutting of the sections, each section is weighed on a digital balance for accurate measurement of the weight of the sections. This helps in controlling the manufacturing process for better quality assurance and quality control.

Benefits of Humidity/Conditioning Chamber

Conditioning chamber is an ideal environmental chamber incorporated with the latest technology, used to create the designated temperature. Presto’s Humidity Chamber has the lowest heat loss ratio due to high quality of insulation with imported glass wool. Chamber has a sealed compressor unit for high speed ‘almost instant’ cooling. Ergonomics and user ease are given a lot of importance while designing the system. It has complete DIGITAL controls.

Conditioning chamber maintains testing samples at a particular temperature and humidity level. The environmental conditions play a crucial role in affecting both the physical and chemical properties of materials and the humidity chamber can conveniently replicate such environmental conditions for testing purposes. Conditioning Chamber is used for textile fabric materials after process completion; the main task of this chamber is to remove the moisture level in the sample. With the help of an efficient humidity chamber, the manufactures can easily ensure the best quality of products delivered to their clients.

Presto offers Polariscope, a highly efficient strain viewer that helps the manufacturers in testing the quality and transparency of the products so that best quality assurance could be ensured to the customers. The working of the Presto’s Polariscope is based on the principle that any change in refractive index is due to different strain distribution and this leads to lower transparency of the material. The testing instrument offered by Polariscope comes in variety of sizes and specifications according to the requirements of the clients

Photoelasticity is a major phenomenon that occurs in PET, Preforms and Glass products. Photoelasticty means the change in the refractive index of the material when there is non-uniform strain distribution throughout the material. Photoelasticity can be a great problem for the manufacturers of PET and glass products as this is great flaw in the quality of the products.

Presto offers two models of Polariscope that are Polariscope Dx and Polariscope computerized. The instruments are manufactured with best quality of materials to provide an extended service life and accurate testing procedures. The testing instrument is provided protection from corrosion and rust with Zinc and chrome plating and has been given a smooth and attractive finish in grey and blue color. The instrument is also provided with an instruction manuals and a conformance certificate that can be traced to any of the NABL approved laboratories.

Benefits of Salt Spray Chamber

The Presto salt spray chamber is the most reliable equipment for checking the corrosion resistance of surface coatings when exposed to a salt laden environment. This time-tested product has been specifically designed to assess the rust-proof ability of components to withstand corrosion due to atmospheric conditions. It provides complete flexibility in simulation of real life weathering conditions.

The test temperature in the chamber is user adjustable from ambient to +40°C and is controlled by a PID controller system. The HMI based touch screen installed in the Presto salt spray chamber is a powerful tool that eases the analysis of corrosion resistance for a wide variety of sample types. A special zero corrosion PT 100 sensor is incorporated in the apparatus. 

The Presto salt spray chamber is triple walled and is fitted with a glass wool insulation, which ensures that the results are accurate and reliable enough to meet the international standard of testing. The chamber incorporates the latest technology including an Air Regulator which regulates the air flow from 0 to 30 psi.

The Salt Spray Tester is designed as per various international Testing Standards which includes, ASTM B 117 and JIS Z 2371. Other than these features like Automated Air Purging and Online Fog Collection makes it easy for the user to perform an error free test.

Benefits of Bursting Strength Tester

The force required for bursting or complete rupture of the board is measured through a Digital Indicator. The bursting strength defines the materials quality as compared to the others. Digital Bursting Strength Tester provides a hydraulic load under a rubber diaphragm of a specific area of the sample under test. It can be used to accurately determine the bursting strength of paper, corrugated cardboard, carton box, card board, leather, cloth or synthetic leathers. The bursting strength value is expressed in terms of kg/cm². Presto, one of the leading manufacturers of testing instruments offer wide range of paper and packaging instruments.

Presto Digital Bursting Strength Tester is utilized for measuring the bursting strength of paper/strong paper-board by submitting it to an increasing uniform hydraulic pressure. The procedure involves preparing the specimen for test and mounting the sample between two circular clamps. The specimen is then, tightened with the help of geared handle provided. The increasing pressure (hydraulic) is then applied by the handle. The diaphragm is expanded till the specimen ruptures. The reading on the digital display is the Bursting strength of the given test specimen in kg/cm². For more details about bursting strength tester contact us.

How does Box Compression Tester Work?

The Compression strength is determined by placing the box on a flat platform and pressing it downwards from the top with the help of motorized arrangement. Box Compression Tester is designed to quantify box or container performance so that the effect of various board mediums, closures and interior partitions can be plainly compared by means of Load & bend analysis. Presto BOX Compression Tester is manufactured to meet the requirements of the Paper & Packaging Industries according to International Standards. It is ergonomically designed and easy to use.

Presto Box Compression Tester is used to measure the box compression strength (BCT), shape change and stacking capability of cartons, beehive crates, paper tanks, paper cases etc. Box Compression Tester is designed to evaluate compression strength of the corrugated box and the load range selected to completely collapse as peak load or may be with a pre-determined load for a given period to evaluate stacking load. Compression Strength Test also serves as a useful index of over all quality of the material and workmanship of the box.

Benefits of Edge Crush tester

Presto Edge Crush tester – Digital (ECT) is rugged enough for any production testing environment. It is the ideal testing equipment for paper making, packaging, quality inspection department and more. ECT tester – Digital (ECT) is a useful equipment for determining the probable compression strength of corrugated and solid fiber board boxes by testing the paper and paper-board used in making such boxes.

Edge Crush Tester / Ring Crush Tester / Flat Crush Tester is used for accurate testing of paper, paper-board, solid fiber-board & corrugated board for ECT test and its components. The Edge Crush tester can also be used for performing compression test on all small packages.

The higher ECT value determined by the ECT tester depicts the rigidity of the CFB box. Hence, it may be used to compare the quality of the CFB board. It is also possible to determine the compression strength of the box (CFB) by using ECT tester with McKee’s formula i.e.Compression strength = k. ECT x T x Z

Where, K= Constant

ECT = edge crush test value

T=Thickness of CFB board (wall thickness)

Z= Perimeter of the box i.e. (2 L + 2 W)

Benefits of Colour Matching Cabinet

The Presto Color Matching Cabinet Spectrum Asia II is highly recommended for laboratories and industries where it is important to maintain color consistency and quality. The equipment provides a standardized environment for evaluation and visual assessment of color.

Metamerism is a phenomenon wherein the test samples appears to match under one light source but seem different when viewed under another light source. In such situations it is highly beneficial to use the Presto Color matching cabinet. The equipment is widely used in the paint and plating industry, besides textile & yarn, plastic, paper and other areas.

The Presto color matching cabinet – Spectrum Asia (Rocker Switch Control) provides faster, closer and accurate color matching solution. It has, thus, been the universally preferred choice for decades.