We at, Prolific Engineers, are manufacturers, exporters and suppliers of adhesion testers, adhesive testing equipment, automobile accessories testing equipment, building hardware testing equipment, cables & conduits testing equipment in India.

Adhesives & Adhesive Tapes Testing Equipment -|- Automobile Accessories Testing Equipment
Building Hardware Testing Equipment -|- Cables & Conduits Testing Equipment

The top layer of the sheet used in manufacturer of decorative laminated sheets, which contains the decorative design as well as the colour, shall be sufficiently resistant to abrasion so that its base layers are not exposed in normal use. The ability of decorative laminated sheets to resist abrasion is determined by holding a circular test specimen taken from the sheet over a horizontal platform and rubbing it with abrasive paper mounted over two cylindrical rubber discs. The test specimen is rotated at a fixed speed and the rubber discs rotate along with it because of friction between them and the test specimen. This causes the surface of the test specimen to abrade. The number of rotations required to bring about a defined degree of change in colour or wearing off of the top layer gives a measure of abrasion resistance of the sheet under test.

The PROLIFIC Abrasion Tester for decorative laminated sheets consists of a horizontal platform which rotates at a fixed speed with the help of a synchro-set motor, two rubber wheels disposed symmetrically about the axis of the platform and located 20 mm in front of its centre, and a loading arrangement to press the rubber discs against the surface of the sheet under a specified load. A digital counter with memory backup is provided to record the number of revolutions of the platform.

A vacuum suction device is provided to remove the abraded dust from the surface of the test specimen.

The equipment is finished in grey hammertone stoving painting and bright chrome plating to give it a corrosion resistant finish.

The PROLIFIC Scrape Abrasion Tester for Automobile Cables consists of a scraping wire, which abrades the test sample under a fixed load of 7 N and a suitable mounting platform for clamping the test samples on.

The scraping wire is in form of a round spring wire with a diameter of 0.45 mm made of nickel chrome spring steel (X23 Cr Ni177) and secured rigidly to a carrier. Motion to the carrier is given through an oscillating arm, which runs on grease sealed type ball bearings minimizing friction and giving uniform load on the carrier. The oscillating arm is moved with the help of a motor operated crank and connecting link to give a total stroke length of 15.5 mm. An arrangement is provided to lift the carrier at both the extreme ends of the stroke. A low voltage supply system with relay is provided to automatically stop the motor as soon as the scraping wire comes in contact with the core of the sample under test. A pre-set type four-digit electronic counter with memory backup is provided to record the number of strokes and also to stop the motor automatically after a pre-set number of strokes.

The test sample is held firmly over a platform with the help of suitable clamps holding it at both ends. An arrangement is provided to lower or lift the platform to accommodate wires of different sizes.

The equipment is built on a rigid metallic base. The equipment is finished in grey hammertone stove painting and bright chrome plating to give it a corrosion resistant finish.

Melt flow index of thermoplastic materials is defined as the rate of flow in grams per ten minutes of extrudate of molten resins from a cylindrical cavity inside a heated metallic tube barrel through a jet of a specified length and diameter under prescribed conditions of temperature, load, and piston position.

The PROLIFIC Melt Flow Index Apparatus for thermoplastic materials consists of a heated extruder tube, a removable jet through which the material under test is extruded, and a piston and dead weights to apply the specified pressure on the material inside the extruder tube.

The extruder tube is made from hardened die steel and is heated by means of two band heaters, which surround its outer circumference. A PID type digital temperature indicator-cum-controller is provided to indicate and control the temperature of the tube accurately. The heaters are lagged with mineral wool for providing thermal insulation.

A cylindrical cavity is provided in the extruder tube for placing the test charge in during the test. The tube also has a hole parallel to the cavity for placing the temperature sensor in. The bottom of the tube is lagged with a 3 mm thick insulation of PTFE to prevent sticking of the extruder. A hollow metallic cylindrical shield is provided all around the extruder tube.

The jet through which the extruder is pushed out is made from hardened and ground die steel. It is placed at the bottom of the extruder cavity and can be removed for cleaning by pushing it from the lower side. The extruder assembly is mounted on a swivable metallic plate to enable it to be titled for removal of the die for cleaning.

A piston made from stainless steel, relieved at the upper end, is provided to apply pressure on the charge placed inside the cavity of the extruder tube. A sleeve is provided to guide the relieved portion of the piston. The top of the piston carries a platform for keeping the load on. The piston is thermally insulated from the load.

A sheet metal control panel is mounted on the side of the equipment and houses the temperature controller and other electrical components.

The equipment is finished in grey hammertone stoving painting and bright chrome plating to give it a corrosion resistant finish.

One cleaning tool for the test cavity, one cleaning tool for the hole in the jet, one packing rod for pressing the charge inside the cavity, one plug for closing the hole in the jet when testing high flow rate materials, one cutting tool for extrudate, and one tool for pushing out the jet for cleaning, are supplied with the equipment.

Dead weights for applying loads of 325 g, 1050 g, 2160 g, 5000 g, and 10000 g including the weight of the piston assembly are also supplied as standard accessories.

Automatic Model
The automatic model is equipped with a repeat cycle pre-set timer and a solenoid operated cutting system to repeatedly cut the extrudate after desired preset durations in addition to all the above features.

Estimation of resistance of vulcanized rubbers to deterioration by ageing is carried out by assessing the change in its tensile strength, elongation, breaking elongation, and hardness after accelerated ageing it at an elevated temperature in an atmosphere of pressurized oxygen / air.

This ageing operation is normally carried out in an enclosed pressure chamber popularly known as oxygen bomb. The temperature inside the chamber is maintained by surrounding it with a digitally controlled electrically heated oil bath.

The PROLIFIC Oxygen / Air Bomb consists of a pressure chamber designed to retain an internal atmosphere of oxygen / air under pressure with provision for hanging test specimens inside it.

The pressure chamber is made out of solid mild steel round to give it adequate strength. It has a screwed on lid, which is also made out of solid mild steel plate. A neoprene o-ring is provided between the chamber and the lid to effectively seal the chamber. A heavy-duty pipe manifold fitted with high-pressure ball valves and a pressure gauge is provided to enable oxygen / air at high pressure to be introduced in the chamber, measuring its pressure, and also to exhaust the oxygen or air inside it. A stainless steel high-pressure pneumatic safety valve is mounted on top of the lid to release any excessive build-up of pressure.

A stainless steel stand for suspending the test specimens from and a high-pressure flexible hose for connecting the pressure chamber to the source of supply of oxygen / air are also provided.

The chamber is partially submerged in an oil bath, which is of double walled construction, with internal walls of heavy mild steel sheet and external walls of CRCA sheet. The space between inner and outer walls is filled with mineral wool for insulation. The bath is heated with the help of an electric oil heater and its temperature is indicated and controlled by a digital temperature indicator cum controller.

The apparatus is finished in grey hammertone stoving painting and bright chrome / zinc plating to give it a corrosion resistant finish. The inner surface of the pressure chamber is hard chrome plated.

Oxygen cylinder / air compressor and heating oil needed for conducting the test are not supplied with the tester and are to be provided by the user.

Accessibility test probes are used for verifying for protection of persons against access to hazardous parts in electrical accessories and electrical appliances.

Various types of test probes are employed to check the access to hazardous parts.

The PROLIFIC Accessibility Test Probes consist of five different types of probes packed in a wooden box with laminated top. Handles of probes are made of insulating material and tips are made of copper. The probes have a wire lead and banana plug to connect them to a low voltage supply source.

A low voltage supply panel is also supplied with the equipment. It consists of a sheet metal panel having a step-down transformer, indicating lights, switch, fuse, and banana sockets.

Individual test probes with or without the supply panel are also available against specific requirements.

Appliance provided with a supply cord, which is moved while in operation shall be constructed so that the supply cord is adequately protected against excessive flexing where it enters the appliance. Compliance is checked by flexing the whole appliance or the part of the appliance that include the inlet opening to an oscillating member so that when the supply cord is at the middle of its travel, the axis of the cord where it enters the cord guard or inlet is vertical and passes through the axis of oscillation, and is loaded by a specified force. In case of the flat cords, the major axis of the section shall be parallel to the axis of oscillation. the cord and its associated ports are turned through an angle of 90º after half the number of flexing unless a flat cord is fitted.

The PROLIFIC Cord Guard (Flexing) Tester consists of an oscillating member, oscillating at a specified frequency with the help of a linkage mechanism driven by an electric motor through a worm reduction gearbox. The oscillating member is in form of flat plate on which the appliance under test can be clamped with the help of suitable clamps. Dead weights are provided to apply the specified force on the cord. A secondary platform is also provided to fix the appliance in a vertical plane perpendicular to the one on which it is held initially. Two guide rods located below the axis of oscillation are provided for guiding the cord. A five-digit pre-set type electronic counter is provided to count the number of flexing and to stop the motor after pre-set number of flexing.

The equipment is built on a floor model fabricated rigid frame, with suitable covers made of steel sheets. Oscillating member is made of aluminium plates. Frame, cover and plates are finished in stoving enamel paints. Other components are chrome plated to give the equipment a corrosive resistance aesthetic appearance. The electric panel to supply rated voltage to the conductors at the rated current is not provided with the equipment and is to be provided by the users.

Metallic components or heating elements of electrical appliances or accessories may, under either normal or abnormal operating conditions, attain a temperature that may either cause plastic or thermoplastic parts in their vicinity to get unduly effected, and may in extreme cases even ignite them. Glow wire test produces abnormal heating conditions to simulate the action of metallic components such as glowing elements or overload resistors, on parts in their vicinity, in order to assess the fire hazard posed by them.

The PROLIFIC Glow Wire Tester is designed to check resistance to fire of insulating parts. It consists of a nichrome glow wire of 4 mm diameter formed into a horizontal loop and having a sheathed fine wire thermocouple of 0.5 mm diameter located in a drilled pocket in the glow wire. A low-voltage, high-current transformer capable of giving currents of up to 150 A at a voltage of between 4 and 5 volts is provided to heat the glow wire. The temperature of the glow wire is indicated and controlled through a digital temperature indicator cum controller.

The test specimen is held in a clamp mounted on a trolley, which can move on ball bearings. The trolley is moved by dead weights so as to apply a force of between 0.8 and 1.2 N on the test specimen at its point of contact with the glow wire. An adjustable mechanical stop prevents the trolley from moving by more than 7 mm after the contact is established between the glow wire and the test specimen. The trolley is moved back manually on completion of application time, which is indicated by an audio signal.

A three channel digital timer with push buttons displays the glow wire application time, test duration, and the time for which the test specimen remains ignited. A scale is provided to measure the height of flame produced, above the upper edge of the glow wire.

The equipment is built on a sheet metal panel housing the timer, temperature controller, transformer, and other electrical components. It is finished in grey hammertone stoving painting and bright chrome plating to give it a corrosion resistant finish.

An Automatic Model, in which the test specimen holder is fixed while a pneumatic arrangement moves the glow wire against it under the specified load and also withdraws it after a specified time, is also available. The pneumatic arrangement consists of a pneumatic cylinder, solenoid valves, and an air filter-regulator-oiler. An air compressor with ½ HP single-phase motor and pressure switch is available as optional accessory with this model.

Breakdown of any insulating material generally occurs either through its volume or over its surface, or in both ways.

Surface failures may arise from flashover, or from progressive degradation of the insulation surfaces by small, localised sparks. Such sparks are the result of breaking up of a surface film of conducting contaminant on the insulation by the heat of a leakage current passing through it.

Rapid breaks in the leakage current produce an over-voltage at the site of the discontinuity and an electric spark is caused. Repeated sparks at any one point may lead to setting up of a carbon track between points at different potentials. This process is known as tracking.

Insulating parts retaining live parts in position shall have adequate resistance to tracking if they are exposed to excessive deposition of moisture or dirt in normal use.

The PROLIFIC Tracking Index Apparatus is designed to test resistance to tracking of insulating materials other than ceramics. The apparatus consists of two brass electrodes of specified dimensions with an arrangement to place them on the surface of the test specimen exerting a specified load on it, and suitable means to apply a specified test voltage across them. A conducting liquid dropping device is provided to wet the surface between the electrodes with a solution of ammonium chloride, with drops of specified size falling at specified time intervals.

The electrode assembly and dropping device are fitted in a sheet metal chamber having an acrylic door for viewing the test set up. A micro-switch cuts off supply to the electrodes whenever the door is opened. An exhaust fan is provided to remove water vapour and other gases produced during the test.

The test chamber is placed on the side of a sheet metal control panel which houses various voltage and current controlling elements, besides switches, indicators, drop counter, etc.

The control panel has an auto-transformer (variac) to vary the voltage across the electrode, a rheostat to adjust the resistance in the circuit to limit the current to 1 ampere with the electrodes short circuited, an over-current relay for tripping the circuit when the current exceeds the specified value, and a drop counting circuit with an electronic digital counter to count the number of drops falling. It also has a voltmeter, an ammeter, and various switches and indicators. A thermal relay is provided to trip off the supply to the electrodes and to activate an audio-visual alarm as soon as the breakdown of the insulation occurs.

The apparatus is supplied with two sets of brass electrodes. Platinum electrodes can also be supplied against specific demand.

The standard model of the apparatus is designed to determine tracking index of up to 300 volts. Special models for determining tracking index of up to 600 volts or up to 1200 volts can also be offered against specific requirements.

Linear dimensions of soft materials such as foams, below 150 mm are measured by using a soft material thickness gauge having an arrangement to measure thickness with an indentor of specified area exerting a specified pressure on the test specimen whose thickness is being measured.

The PROLIFIC Soft Material Thickness Gauge for soft materials such as foams consists of a dial indicator fitted on a metallic frame and a round indentor of specified size and weight to apply a specified pressure on the test specimen.

The reading is taken after a low voltage electric contact is made between the indentor and tip of the dial indicator. An LED indicator is provided to indicate the making of the contact. The electrical contact system is operated with the help of two penlight cells. This arrangement ensures that the force exerted by the spring of the dial indicator is not transferred to the indentor, thus avoiding any error in measurement of the thickness.

A set of metallic spacers having ground ends is provided to find the thickness of specimens of up to 150 mm thickness.

The apparatus is finished in grey hammertone stoving painting and bright chrome plating to give it a corrosion resistant finish.