Rubber Tensile Testing Machine
Tensile strength and elongation are the two prime characteristics of most of the raw materials, whether they are metals: or non-metals: such as foam, rubber, textiles, plastic, paper: or finished products such as rods, wires, ropes, yarns, belts etcetera. These properties very often play the major role in determining the suitability of any raw material for any specific application. It is therefore, of utmost importance to determine these characteristics accurately, conveniently, and quickly.
Tensile Testing Machine provides a relatively inexpensive way for determining the tensile strength and elongation of variety of raw materials such as rubber, leather, fabric, plastics, Belts, wires etcetera. They are based on constant rate of traverse principle in which one end of the test specimen is held in a stationary grip, while the other end is made to move at a known fixed speed with the help of motor, gearbox and screw arrangement. The load exerted on the stationary grip is sensed by a load cell and indicated by a digital load indicator. The controller is microprocessor based and has the facility of over load protection, peak hold and auto calibration. The load directly indicated in kilograms or Newton.
The elongation of the test specimen is measured on a digital indicator fixed on the frame of the tester, which indicates the distance between the grips. The frame of the tester fabricated from heavy mild steel sections to give the required rigidity and strength. Various built in safety arrangements such as over travel protection are provided.
The tester is finished in metallic painting and bright chrome| zinc plating to give the apparatus a corrosion resistant finish. It is supplied complied which electrical. Which include micro-, switches, Push buttons, and contactors for safe and convenient operation.
Tensile Specimen Cutting Die
Specimen Cutting Press- Hydraulic tests are conducted on various materials or products and the test sample / slab is placed over a flat and smooth piece of plywood, hardwood, rigid plastic, or hard rubber (ebonite) while the cutting die is pressed down from the top to cut out the test specimens. We manufacture these test specimens of specified shapes and size which are to be cut out of the test samples and available in different designs and varied price as per the customer specification.
Din Abrasion Tester Rotary Drum Type
In Din method of determine abrasion resistance of vulcanized natural or synthetic, a cylindrical rubber test specimen is abraded against an abrasive surface mounted on a rotating cylindrical drum in such a manner that abrasion takes place on one of the flat ends of the test specimen which is held against the abrasive surface under a specified load while being traversed across it. The ratio of the volume loss of a standard rubber to the volume loss of the test rubber measured under the same conditions, expressed as a percentage, gives the abrasion resistance index of the rubber under test.
Din Abrasion Tester is designed to determine abrasion resistance index of natural and synthetic rubber in accordance with the above principle. It consists of test specimen holder with a cylindrical opening adjustable between 15.5 to 16.3 mm to clamp the test specimen with an arrangement to adjust the length of test specimen protruding out. The holder is mounted by a screw mechanism along a length of a rotating drum on which the abrasive cloth is fixed. The movement to the screw mechanism and drum is given by an electric motor, gearbox and chain mechanism to give the specified speed of rotation to the drum and the specified lateral movement to the test specimen holder. The swivel arm and test specimen holder are so disposed that the test specimen is pressed against the drum under the specified load with its centre axis at an inclination of 3 degree to the perpendicular in the direction of rotation and placed above the longitudinal axis of drum. A rack and pinion arrangement to rotate the test specimen about its axis during the test (whenever desired) is also provided.
The abrasive cloth is firmly fixed to the drum using a suitable peel able adhesive with the ends of the abrasive cloth butt jointed together. The equipment is provided with limit switches which, in addition of giving over travel safety to the movement of test holder by preventing the lower edge of the test specimen holder to touch the abrasive cloth.
The equipment is built on rigid steel base and finished in grey metallic and bright chrome / zinc plating to give it a corrosion resistant finish. Moulding die, rotary type cutting die(hollow drill) for preparing test specimens and extra abrasive cloth are available as optional accessories.
Compressiblity and Recovery Tester
TBG Compressibility and Recovery Tester of Gasket Material Consist of an Anvil- A hardened and ground surface on which the sample is placed. There are a set of steel cylindrical shape penetrators of specified sizes and shape according to the material test (as per Table-1). There are two dials also mounted on the anvil for the measurement of the thickness of the test specimen at the time of preloading and the total load. There are two digital dials so that by taking the average value you can measure the accurate thickness.
There is the software in the load monitor for the application of preload and major load for the specified period after that buzzer give the indication to note the dial gauge reading.
Preload – A preload which shall include the weight of the penetrator itself and added weight of the penetrator itself and added weights to give the value specified within ± 1%. Preloads for various types of gasket materials are as shown in Table 1, unless otherwise specified.
There is a selector switch on the control panel for the setting of load conditions as given below.
- Mode 1= pre-load 22.2 N & total load 1112 N
- Mode 2= pre-load 4.4 N & total load 222 N
- Mode 3= pre-load 4.4 N & total load 445 N
- Mode 4= pre-load 4.4 N & total load 356 N
De-Mattia Flex Tester
De-Mattia Flex Tester has a set of grips to hold test specimens in two tiers with their holding faces lying in the same vertical plane. Holding one end of the test specimen in a fixed grip and the other end in a reciprocating grip provides the flexing and unflexing action. The set of grip has two-fixed grip and one large reciprocating grip positioned between them in order to flex half of the test specimen while the other half is being unflexed. The reciprocating grip is slide on hardened and ground rods made of high carbon steel. The reciprocating motion is provided by an eccentric and linkage mechanism driven by an electric motor through V-belt and pulleys. A six digit electronic counter is provided for indicating the number of the test cycles undergone.
The equipment is build on a rigid fabricated base plate and finished in metallic painting and bright chrome/zinc plating to give it a corrosion resistant finish. Moulding dies for preparing test specimen, and jig and punch assembly for making initial crack in test specimen for crack growth test are available as optional accessories.
Hot Air Oven
Determination of effect of ageing on various physical properties of different materials may be carried out by heating the material under test inside an air oven so that the effects of long term ageing are reproduced within a much shorter duration of time for this determination, physical properties of the material under test are determined before ageing and ageing the test specimen at the specified temperature for a set duration of time and subsequent to the room temperature before conducting the tests again.
Determination of various physical characteristics of different materials and products at elevated temperature may be carried out by heating the test specimen to the appropriate temperature inside a constant temperature air oven and determining the required characteristics with the specimen kept under the same temperature. For this purpose the equipment needed for conducting the determination can either be kept inside the oven along with the test specimen, or if this is not feasible because of certain constrains, by taken the heated specimen out from the oven and conduction the test in still air within the shortest possible span of time.
The TBG hot air Oven has a test chamber of double walled construction. The inner walls are made of stainless steel sheet and outer walls of CRCA sheet. The space between the two walls is filled with mineral wool for insulation. The chamber is fitted with two adjustable perforated shelves for keeping the test specimen or the test equipment on.
The oven is heated electrically with the help of heaters placed in ribs on the bottom and sides of the chamber. (An air circulating fan is provided on the back of the chamber for even temperature distribution) the temperature inside the test chamber is indicated and controlled by digital temperature controller.
The chamber is provided with two ports with adjustable openings for enabling natural change of air inside it by convection. These ports can also be used for providing electrical access to the test specimen kept inside the oven, if so desired.
Deep Freezer
Robust construction and inner chamber is made out of Stainless Steel 304 grade and outer chamber is of mild steel duly powder coated Outer front double walled door is insulated and is fitted with magnetic tape for air tight closing for no temperature loss, provided with lock and key arrangement.
A full view inner Glass door enables inspection and monitoring of inner chamber specimens without disturbing the process temperature. High grade PUF Iinsulation between outer and inner chamber for minimal thermal losses. Direct cooling system for stable temperature control by ISI marked Compressor/Condensing Units CFC free & R-134 an eco friendly refrigerant and R-23 for saturation.
Control panel having all controls and circuitry with Temperature controller cum Indicator Microprocessor based with LED display for Set Value (SV) & Process Value (PV) to select any desired temperature. Caster wheel mounted for easy portability. Supplied with cord and plug. Operating Voltage: 220 Volts AC (50 Hz).
Humidity Chamber
Humidity Chamber made of cubical shape, the inner body of the chamber made of Stainless Steel, there is a Stainless Steel water tank at the bottom of the chamber, an immersed heater is fitted to the tank for making Humidity. There are two wire mesh tray are also fitted to the chamber, the tray are removable, the test specimen are hold by the trays. There is a hinged door on the front of the instrument; a glass window is fitted to the hinged door. The outer body is made of Mild Steel duly powder coated to give it a corrosion resistant long life. There is a control panel on which digital Humidity Controller, a Digital Temperature and Switches for cooling, heating, humidity and mains are mounted. The cooling is done by Compressor and heating is done by Heaters. The Temperature Sensor and Humidity Sensor are fitted within the chamber.
IRHD Hardness Tester
The hardness is obtained by the difference in penetration depth of a specified dimension ball under two conditions of contact with the rubber.
- with a small initial force
- with a much large final force
Melt Flow Index Apparatus
Melt Flow of thermoplastic material is defined as the rate of flow in grams per ten minutes of extrude of molten resins through a jet of a specified length and diameter under prescribed conditions of temperature, load & piston position in a cylindrical cavity inside a heated metallic tube barrel at the measurement is being made.
Melt Flow Index Apparatus for Plastic consists of a heated extruder tube, an interchangeable jet through which the material under test is extruded, and a piston with dead weights to apply the specified pressure on the material inside the extruder tube. The extruder tube is made from carbon steel and is heated by means of a Bend Heater, which surrounds its outer circumference. A PID controller is provided to indicate & control the temperature of the tube. The tube has a whole parallel to its bore for placing the thermocouple junction. The heater logged with mineral wool insulation. The assembly is fixed on a rigid stand. The bottom of the tube is lagged with a 3 mm thick insulation of PTFE to prevent sticking of the extrude. The jet through with the extruder is pushed out is made from hardened and ground die steel. It is held at the bottom of the extruder tube. The piston made from silver steel relieved at the upper end is provided to push the extrude out of the jet. The piston moves inside the cavity of tube. A sleeve to provide to guide the relieved portion of the piston. The top of the piston carries a plate-form for keeping the load on. The plate-form is thermally insulated from the load. The extruder tube assembly is mounted on a metal box. A sheet metal control panel is mounted on the side of the equipment & houses the PID Controller, DIGITAL PRESET TIMER at other electronic components. Cleaning tools for tube cavity and jets & stoppers & cutter for the extradite are also supplied with the equipments.
Izod Charpy Impact Tester
As per ASTM D - 256 to test impact resistance of plastics. The test indicates the energy required to break standard test specimen.