Product Overview

The KR‑418 MIT‑style folding‑endurance tester evaluates anti‑fatigue folding performance for paper, paperboard, as well as flexible sheet‑style specimens such as FPC flexible circuits and thin‑foil materials. Under controlled spring‑loaded tension, the clamped sample undergoes symmetrical 135‑degree left‑and‑right reciprocating folding cycles until fracture occurs. The unit precisely records total double‑fold counts to quantify folding‑resistance capability of test pieces.

This desktop laboratory device fully meets APPI‑T423PM, ASTM‑D2176, JIS‑P8115 and GB/T 2679.5 testing specifications. It is widely deployed within paper‑making mills, carton‑packaging manufacturers, consumer‑electronics factories, material‑research institutes and accredited third‑party QC laboratories for incoming‑material validation, product‑formula comparison and finished‑goods performance audit.

Core Product Competitive Advantages

1. Precision‑Motor‑Driven Reciprocating‑Fold Mechanism High‑performance motor delivers stable cyclic folding motion with high‑positional repeatability and low running‑noise. Optimised anti‑interference power‑supply rectifier circuit enhances long‑run stability for extended continuous batch‑sample testing, effectively reducing mechanical drift.
2. Adjustable Multi‑Gear Spring‑Tension & Interchangeable‑Gap Folding‑Head Spring‑tension is configurable from 4.9 N up to 14.7 N. Four‑selectable folding‑head clearance sizes (0.25 mm / 0.5 mm / 0.75 mm / 1.0 mm) are provided, allowing quick adaptation for specimens of varying thickness from thin paper to flexible circuit‑foil sheets without complex tooling change‑over.
3. Intelligent Break‑Point Auto‑Stop & Full‑Function Data Processing Built‑in micro‑controller monitors test status in real‑time. When specimen fractures, the instrument automatically halts operation and locks final folding‑cycle count. Operators can set target folding‑speed, folding‑angle and cycle parameters via keypad. On‑board statistics support data review and direct thermal‑print output for lab‑report generation.
4. User‑Friendly Keypad‑Controlled Operation Interface Clear dedicated‑function keys for tension setting, data check, unit‑switch, print and emergency‑stop. Operators can complete specimen‑clamping, parameter setup and test launch with minimal training. Large‑digit counter supports up to 999 999 maximum recorded folding‑cycles.
5. Robust Compact Bench‑Top Cabinet Construction Solid metal cabinet‑frame protects internal drive and sensing assemblies. Compact footprint fits standard laboratory work‑benches. Clearly‑marked safety warning labels reduce mis‑operation risks during daily‑QC workflow.

Complete Technical Parameter Table

Standard Complete Test Operating Workflow

1. Pre‑Test Preparation Place tester on level vibration‑free lab bench. Power‑on and finish system self‑check. Cut specimens to standard 140 × 15 mm dimensions and condition samples under specified temperature‑humidity environment. Select appropriate folding‑head clearance and adjust spring‑tension load according to applicable test‑standard.
2. Specimen Mounting Open upper‑lower sample‑clamping jaws, insert prepared test strip securely. Ensure specimen sits straight without twisting or offset to eliminate abnormal stress during folding cycles.
3. Configure Test Parameters On front‑panel keypad set folding‑speed and other required parameters. Reset cycle counter to zero.
4. Launch Automatic Folding‑Endurance Test Press start key. Equipment carries out continuous 135‑degree left‑right reciprocating folding. Once specimen fractures, instrument triggers auto‑stop and preserves final folding‑count reading.
5. Result Review & Report Output Read fracture‑cycle value from display. Conduct multiple parallel‑specimen tests for batch‑statistical results. Print hard‑copy test‑record via built‑in printer as required.
6. Post‑Test Tidying Release clamps and remove broken specimen. Clean folding‑head area of paper‑dust or fragment residues. Reset counter value. Shut‑down main power after finishing all test batches.

Wide Industrial Application Scenarios

Pulp‑Paper & Cardboard‑Manufacturing Plants

Folding‑fatigue QC for cultural‑paper, packaging base‑paper and carton‑board; evaluate folding‑durability for foldable‑box raw‑materials.

Flexible‑Electronics Component Factories

Anti‑bending‑life assessment for FPC flexible‑circuit thin sheets and metal‑foil substrates used within handheld electronic devices.

Packaging‑Material R&D Departments

Compare folding‑resistance performance of new‑grade paper‑formulations, support lightweight‑packaging‑material development.

University Paper‑Material & Electronic‑Material Laboratories

Teaching‑experiment apparatus for paper‑science and flexible‑material‑engineering majors for folding‑fatigue‑characteristic research.

Third‑Party Accredited‑Testing‑Organizations

Conduct APPI‑T423PM / ASTM‑D2176 / JIS‑P8115 / GB/T 2679.5‑compliant folding‑endurance evaluation and issue formal inspection‑documents for product‑certification audits.

Standard Factory‑Full‑Delivery Kit

1. KR‑418 MIT‑type folding‑endurance‑tester main‑unit
2. Full‑set interchangeable folding‑head gap inserts (0.25 / 0.5 / 0.75 / 1.0 mm)
3. Built‑in thermal printer together with initial roll of printer paper
4. Power‑supply connecting‑cable
5. Multilingual printed‑operation‑manual complying with APPI‑T423PM, ASTM‑D2176, JIS‑P8115, GB/T 2679.5
6. Factory‑issued performance‑inspection‑certificate

Global Distributor & After‑Sales‑Support

We deliver remote‑one‑on‑one operational guidance covering folding‑head swap, tension‑adjustment and specimen‑mounting workflow. Spare‑parts stock includes folding‑head assemblies, printer consumables and drive‑system components. Bulk‑order customers can request custom‑voltage variants for overseas‑market deployment. Regional‑exclusive‑agent privileges contain priority‑production‑scheduling, OEM private‑branding‑services and complete‑set high‑definition product‑marketing‑image‑resources.

Product‑Banner‑Marketing‑Slogan

KR‑418 MIT‑Type Folding‑Endurance Tester | Reciprocating‑Fold Fatigue‑Life Analyser For Paper‑Board‑FPC‑Thin‑Foil Sheet‑Materials

Core‑Feature‑Labels‑For‑Product‑Images

Motor‑Driven Stable‑Fold Motion | Multi‑Gap Interchangeable Folding‑Head | 4.9‑14.7 N Adjustable Spring‑Tension | Specimen‑Break Auto‑Stop | 0‑999999 Wide‑Range Counter | On‑Board Thermal‑Print Output | Multi‑International‑Standard‑Compliant | Compact Bench‑Top Layout

Safety‑Operation‑Reminder

Keep fingers away from moving folding‑head and clamping‑jaw zone while test‑cycle is in‑progress. Clean folding‑head slot after each‑batch testing. Periodically verify tension‑load accuracy to guarantee measuring‑data reliability.