Paper cone and core testing instruments manufacturers in India supply a niche that matters to anyone winding film, foil, paper or yarn, because a weak core can collapse under a heavy roll. Civil Mechanical India is among the suppliers in India with dedicated crush, bond and dimension testers for core and cone production lines.
The range follows the failure points of a paper core. Crush testers measure radial strength, axial compression and ring crush of the board used to wind it. Ply bond and Cobb testers show whether the glue lines and the sizing hold up, and the moisture meter explains many strength changes. Gauges check inside diameter, wall thickness and cone taper angle, while the friction tester assesses a yarn cone surface.
Core plants test on the line for dimensions, and in the lab for strength once or twice per shift.
Last updated: November 2026
Cobb ring apparatus that measures water absorptiveness of the paper cone and core board surface over 60 seconds. Used by core makers to control sizing and coating.
Hardened plug gauge set with go and no-go ends for checking the inside diameter of paper cores from 25 to 150 mm. Used on core production lines and at film, tape and textile converters.
Ring crush instrument with cut-out specimen holder for evaluating compression resistance of paperboard strips used in cones and cores. Used for incoming board and finished tube QC.
Precision protractor-type gauge that checks the taper angle and cone profile of paper textile cones for yarn winding. Used at cone manufacturing lines and in spinning mills.
Vertical compression tester that loads a paper tube along its axis to measure end-to-end crush strength. Used by core manufacturers and textile mills to rate tube stacking capacity.
Motorised compression tester that squeezes paper cores and tubes between flat platens to measure radial crush load and deflection. Used by core makers and textile, film and paper converters.
Digital tube micrometer with long anvil to measure the wall thickness of paper cores and tubes without cutting them. Used on core winding lines and in incoming inspection.
Peel and internal bond tester measuring the adhesion between spiral wound plies of paper cores and tubes. Used by core manufacturers to verify glue application and tube integrity.
Pin electrode moisture meter that reads moisture content of paper cores and tube board in percent within seconds. Used in storage, receiving and production QC of cones and cores.
Sled-type friction tester that measures the static and kinetic friction of paper cone surfaces against yarn. Used in textile mills and cone makers to control yarn unwinding performance.
| Function | Products | What to confirm |
|---|---|---|
| Core strength | Paper Core Radial Crush Strength Tester, Paper Core Axial Compression Tester for Spiral Tubes, Core Ring Crush Tester for Cone Board Segments | Maximum force, core diameter and length range, platen size, test speed and data output |
| Bond, sizing and moisture | Paper Tube Ply Bond Strength Tester, Cobb Sizing Tester for Core Board Water Absorption, Pin Type Moisture Meter for Paper Cores and Tubes | Peel or tensile fixture type, Cobb ring area and timing, moisture range and the species or board calibration |
| Dimensions and cone shape | Core Inside Diameter Go No-Go Plug Gauge Set, Paper Core Wall Thickness Micrometer with Long Anvil, Paper Cone Taper Angle Measuring Gauge, Yarn Cone Surface Friction Coefficient Tester | Diameter steps in the plug set, anvil reach and resolution, cone angles covered and friction method |
Paper Testing Instruments evaluate flat sheet properties such as burst, tear, smoothness and brightness on paper samples. Cone and core instruments test a formed, wound and glued tube: how it resists crushing, whether its plies stay bonded and whether diameter and wall thickness hold tolerance. A core plant may use both, since the board itself is a paper while the finished core is a structural part.
See also: Paper Testing Instruments
The complete Paper Cone and Core Testing Instruments range (10 products), in alphabetical order:
Match the maximum force to the strongest core you make, and confirm the range of core diameters, lengths and wall thicknesses the fixtures accept. Look at crosshead speed control, whether the peak is held and displayed, and software output. Ask whether your customers specify a radial, flat or edge crush method so the right fixtures come with the machine.
A go and no-go plug set for inside diameter, a micrometer with a long anvil for wall thickness, and a length gauge cover most checks. Order gauge steps to match every core size you produce, including tolerances, and ask for certified setting masters so gauges can be verified during internal audits.
Core strength falls quickly as moisture rises, so a core that passes in the lab may fail after storage in humid warehouses. Pin type meters allow quick checks on incoming board and finished cores. Check the measuring range, correction for temperature and whether calibration for your board type is available.
Paper core and tube manufacturers, cone makers for textile and yarn, film and foil converters who consume cores, adhesive tape makers, and packaging laboratories buy these instruments. Buyers commonly add a core crush tester, plug gauges and a moisture meter first, then extend to ply bond and Cobb tests when a customer complaint or audit calls for documented board quality.
It compresses a short ring of board set on edge in a groove, measuring the edgewise strength of the paperboard used to make cores. Because it reflects board quality before winding, it helps suppliers compare board grades and explain core performance differences.
Yes, with interchangeable platens or fixtures, one machine can cover a range of diameters and lengths. State the smallest and largest core you make, plus wall thicknesses, when you enquire, so the frame capacity and fixtures are selected correctly.
Yes. Civil Mechanical India supplies core and cone manufacturers across India and can pack for transport to your plant. Installation and operator guidance can be arranged, and details are confirmed in the quotation.
Instruments are designed around common practice such as ASTM D5342 for tubes and TAPPI methods for board. If a customer uses a private specification, send it so that fixtures and reporting can be matched.
Yes. Testers are packed for export with documentation, and electrical parts can be built for local supply. Mention destination and voltage when requesting the quote.
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