An injection moulder is judged on repeatable parts, and that starts with knowing the grade in the hopper and the properties of what comes out of the tool. As plastic injection molding testing instruments manufacturers in India and suppliers in India, we build the bench instruments a moulding QC lab needs, from melt flow to impact and tensile testers.
The range is organised by what you want to learn. Incoming checks use the melt flow index tester and moisture analyzer on granules. Specimen preparation uses the notching machine and moulded test bars. Mechanical and thermal properties are measured on the universal tensile tester, the Izod and Charpy impact machine, the Shore D durometer and the HDT and Vicat bath. Finished parts are checked for shrinkage, colour and gloss, with a stress crack bath for polyethylene parts.
A small moulding unit may start with a melt flow tester, moisture analyzer and impact machine. Automotive and appliance suppliers usually add the full thermal and tensile set for customer approvals.
Last updated: November 2026
Thermostatic bath for evaluating stress cracking of molded polyethylene and other plastics under bent strip conditions in surfactant. Used by molders of closures, fittings and containers to rank resin grades and process quality.
Handheld spectrophotometric meter that measures color coordinates and gloss of molded surfaces. Used by molders supplying automotive and appliance parts to check color matching across lots.
Digital durometer with a constant-load test stand that measures indentation hardness of rigid and semi-rigid plastic moldings. Used by molders for goods-in inspection and for comparing mold batches in appliance and automotive supply.
Oil bath instrument that measures the temperature at which molded plastic bars deflect under flexural load or are penetrated by a needle. Used to rate heat resistance of molded parts in automotive and appliance industries.
Pendulum impact machine for notched and unnotched Izod and Charpy tests on injection molded plastic bars. Used by molders and compounders to compare toughness of grades and detect brittle parts.
Extrusion plastometer that measures melt mass-flow rate and melt volume-flow rate of thermoplastic molding compounds. Used by injection molders and resin QC labs to verify batch consistency before production runs.
Halogen heating moisture analyzer that measures residual water in hygroscopic polymer pellets before molding. Used for nylon, PET, PC and ABS where moisture causes splay and brittleness.
Measuring system for determining mold shrinkage of injection molded plaques in flow and cross-flow directions. Used by mold makers and molders to size cavities and check process stability.
Precision broaching machine that cuts V-notches of defined radius and depth in molded plastic bars before impact testing. Used in injection molding QC and polymer test labs.
Computerized tensile and flexural testing machine for injection molded dumbbell bars. Gives tensile strength, modulus and elongation of engineering plastics for molders and polymer QC laboratories in automotive and appliance supply chains.
| Function | Products | What to confirm |
|---|---|---|
| Resin and granule checks | Izod and Charpy Impact Tester for Molded Plastics, Moisture Analyzer for Plastic Granules and Pellets | Temperature range, load weights supplied, test standard such as ISO 1133 or ASTM D1238, and moisture analyzer sample capacity and resolution. |
| Mechanical strength | Universal Tensile Tester for Molded Plastic Dumbbell Specimens, Heat Deflection Temperature and Vicat Softening Point Tester, Specimen Notching Machine for Plastic Impact Bars, Shrinkage Measurement Apparatus for Molded Plastic Plaques | Load cell capacity, pendulum energy options, notch geometry, grip types for dumbbell specimens and software reporting. |
| Thermal and hardness | Hardness Tester Shore D for Molded Plastic Parts, Heat Deflection Temperature and Vicat Softening Point Tester | Number of test stations, oil bath temperature limit, heating rate, durometer scale and stand load. |
| Part appearance and stability | Gloss and Color Difference Meter for Molded Plastic Parts, Melt Flow Index Tester for Injection Molding Grades, Environmental Stress Crack Resistance Test Bath for Molded Parts | Measurement geometry of the colour meter, plaque size for shrinkage, bath temperature and number of bottle or specimen stations. |
Injection moulding instruments test solid moulded parts, specimens and the resin grade used for them, so tensile, impact, HDT and melt flow testers dominate. Blow moulding instruments test hollow containers, with burst, squeeze, drop and wall thickness gauges. A company making both bottles and technical parts will often need the common MFI and impact testers plus the container testers.
See also: Blow Molding Testing Instruments
The complete Plastic Injection Molding Testing Instruments range (10 products), in alphabetical order:
Check that the temperature range and weight set cover your polymers, for example polypropylene at 230 deg C and 2.16 kg or polyethylene at 190 deg C. Ask about barrel and piston dimensions to the ISO 1133 or ASTM D1238 standard, automatic cutter options, power supply and whether a volume-flow attachment is needed for MVR reporting.
Select pendulum energies that place your results in the 10 to 80 percent range of the scale, and confirm whether you need Izod, Charpy or both. Specimen notching must be uniform, so pair the machine with a notching machine and check notch tip radius. Ask for calibration of pendulum energy and a vice or support set for your specimen size.
Most plastics tests need 5 kN to 50 kN, with a low-force range for soft grades. Check crosshead speed range, grip pressure for dumbbell specimens, extensometer option for modulus and the ISO 527 or ASTM D638 test method in the software. A computerised machine with report export saves time in audits.
Injection moulders supplying automotive, appliance, electrical and consumer goods markets, resin traders and compounders, mould makers, tool rooms, product design labs and third-party plastics test labs. Typical enquiries start with MFI, impact and tensile testers and extend to HDT, Vicat and shrinkage equipment when customers ask for material certificates.
Hygroscopic resins such as nylon, PET and polycarbonate lose strength and show splay marks if moulded wet. A halogen moisture analyzer gives residual moisture in minutes, so the dryer setting can be confirmed before the material enters the machine.
It shows the temperature at which a bar bends by a set amount under a standard load, which indicates how a part behaves near hot engines, lamps or appliance housings. Vicat softening point adds a second view on how close to melting the grade performs.
Yes. Instruments are manufactured in India and supplied to plants, labs, institutes and distributors across the country and for export orders. We provide technical datasheets for tenders and can arrange installation and training at your site.
A standard plaque is moulded, cooled and measured in flow and cross-flow directions against the mould cavity dimension. The shrinkage measurement apparatus reads these lengths accurately so you can correct tool dimensions or process settings.
Yes, with a thermostatic bath, a reagent such as a surfactant solution and notched or bent specimens held under stress. The bath keeps temperature constant and the time to crack is recorded, which compares grades for tanks, housings and containers.
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