Paper Cone Specs for Murata Vortex, QPRO and Process Coner Winding Machines

Murata winding machines — including the QPRO Coner, Process Coner, and Vortex MVS series — are precision equipment with specific cone geometry requirements. Using cones that do not meet these requirements creates problems that are not always immediately obvious: spindle fit variation, package shape inconsistency, or end breaks that appear mechanical but are actually cone-related.

This guide covers the paper cone specifications relevant to the main Murata winding machine types, and what to verify when sourcing cones for Murata equipment.

Why Murata Machines Have Specific Cone Requirements

Murata winding machines use precision spindle and cradle systems designed to work within specific cone geometry tolerances. The key variables are:

• Taper angle — the angle of the cone body must match the spindle cradle geometry for proper seating
• Base and nose diameter — must fall within the spindle's operational range
• Cone length — determines winding position relative to the traverse mechanism
• Wall rigidity — the cone must withstand winding tension without deforming

On standard Murata autoconer equipment, the most commonly specified taper angles are 4°20′ and 5°57′. The correct angle depends on the specific machine model and the package configuration being run. Always confirm with your machine documentation or service contact before ordering cones.

Murata QPRO Coner: Paper Cone Considerations

The Murata QPRO Coner is a high-efficiency automatic winding machine designed for high-speed production with integrated yarn quality monitoring.

Taper angle

The QPRO Coner typically operates with 4°20′ or 5°57′ cones depending on configuration. Confirm your specific machine setup — both angles are common in the field.

Surface finish

At QPRO operating speeds, smooth and velvet finish cones are generally preferred. The QPRO's high traverse speed means surface texture differences in the cone have a more pronounced effect on yarn tension consistency than at lower winding speeds.

Dimensional consistency

The QPRO's automated package monitoring is sensitive to package shape variation. Cones with dimensional inconsistency across a batch will produce variable package shapes that trigger machine stops. Batch-to-batch consistency in cone dimensions is particularly important on QPRO installations.

Murata Process Coner: Paper Cone Considerations

The Murata Process Coner is designed for careful handling of delicate yarns through a gentle yarn path and precise tension control.

Surface finish priority

Because the Process Coner is typically used with higher-value or more delicate yarns, smooth finish cones are generally recommended to minimise surface abrasion risk. Velvet finish is acceptable for standard cotton counts.

Dimensional accuracy

The Process Coner's precision tension system is more sensitive to cone-related variables than standard autoconers. Cones with roundness deviation or dimensional variation outside tolerance will create tension inconsistencies that the machine's monitoring will flag.

Taper angle

Process Coner installations vary — confirm taper angle with your machine configuration. Both 4°20′ and 5°57′ are used across different installation types.

Murata Vortex MVS: Cone Compatibility Notes

The Murata Vortex MVS is a vortex spinning machine that produces yarn and winds the output package onto a paper cone as part of the production process.

Yarn characteristics

Vortex-spun yarn has a distinctive open structure with a wrapped fibre surface. This yarn type tends to benefit from velvet or embossed finish cones for good initial grip and stable base layer formation.

Package requirements

Vortex yarn cones are typically used for downstream knitting applications. Package shape consistency is important for knitting machine performance — cones with good dimensional control produce more uniform packages.

Cone specifications

Confirm cone dimensions directly with your Murata Vortex installation specifications. The package geometry on Vortex machines may differ from standard autoconer packages.

Taper Angle Compatibility: 4°20′ vs 5°57′ on Murata Equipment

The taper angle difference between 4°20′ and 5°57′ is significant for machine compatibility:

• A 4°20′ cone has a narrower taper — the cone body is more cylindrical
• A 5°57′ cone has a wider taper — the cone body is more pronounced in its angle

These two angles are not interchangeable. Using the wrong taper on a Murata spindle will result in either a loose fit causing slippage during winding, or an inability to seat the cone correctly. If you are unsure which angle your Murata machine requires, the specification is available in your machine's operating manual or from your Murata service contact.

Surface Finish Recommendations for Murata Winders

As a general guide for Murata winding machine installations:

• Fine cotton (40s and above): smooth finish preferred
• Medium cotton (20s to 40s): velvet finish preferred
• Coarse cotton or vortex-spun: velvet or embossed
• Polyester or synthetic filament: smooth finish
• Blended yarns: velvet finish as the reliable default

High-speed Murata autoconer installations should lean toward smooth or fine velvet finish to minimise tension variation at traverse speeds.

What to Verify Before Ordering Cones for Your Murata Machine

A pre-order verification checklist for Murata installations:

• Confirm taper angle from machine documentation — 4°20′ or 5°57′
• Confirm cone length and base/nose diameter range from machine specification
• Specify surface finish based on yarn type and winding speed
• Request a sample batch and run it on the actual machine before a full order
• Measure sample cone dimensions — roundness, length, base, nose — against specification
• Evaluate end break rate and package shape on the sample run

A supplier that can provide technical data alongside the cones — not just the product itself — is better positioned to support your machine-specific requirements.

Aziz Packaging Limited supplies kraft paper yarn cones in 4°20′ and 5°57′ taper angles with smooth, velvet, and embossed surface finishes. If you are running Murata winding machines and want to verify cone compatibility before ordering, contact us with your machine model and taper angle specification. We can supply a sample batch for testing on your installation.

Murata Mach Splicer: Notch Specification and Cone Compatibility

The Murata Mach Splicer is the yarn splicer mechanism integrated into all current QPRO machines — not a separate machine model. It joins yarn ends without a knot during package changes and yarn breaks. From a cone geometry perspective, Mach Splicer machines use the same cone as standard QPRO configurations, with one additional critical requirement: notch type.

Notch type for Murata QPRO and Process Coner: V-notch

During the auto-doff cycle, the Mach Splicer arm sweeps the yarn tail into the notch at the cone nose to anchor it for the first wind. If the notch is the wrong shape — Y-notch or U-notch — the yarn tail does not seat, the package starts unanchored, and the machine stops on the first few metres. On a 60-spindle QPRO, if 10 percent of positions stop for this reason, the cumulative production loss per shift is significant. Specify V-notch explicitly on your proforma invoice.

Diagnosing Murata QPRO Stoppages Caused by the Paper Cone

Cradle stop / cone insertion failure: Nose inner diameter outside ±0.25mm tolerance, or cone ovality above 0.3mm at the nose. Measure 20 cones from the batch — more than 5 percent non-conforming means the batch should be rejected.

Tension fault on first package layers: Wrong notch type preventing yarn tail capture, or smooth finish on synthetic yarn causing layer slip. Test the auto-doffer catch function on the stopped head and verify the cone finish specification.

Package shape fault: Taper angle inconsistency, length out of tolerance, or cone deformation under winding pressure (burst strength below 2.5 kg/cm²). Measure taper angle on 10 cones and confirm cone weight is within 40–42g.

Increased vibration after a supplier change: Higher ovality in the new batch. Run a roundness measurement on samples from both batches and compare — maximum acceptable ovality at the nose is 0.3mm.