KR‑624 Finished‑Footwear Thermal‑Insulation Performance Tester

Category 9. Shoes Testing Machine

Additional information

Product Details：

KR‑624 Finished‑Footwear Thermal‑Insulation Performance Tester

Product Overview

The KR‑624 sand‑bath‑type finished‑shoe thermal‑insulation tester evaluates high‑temperature‑resistance and heat‑barrier capacity of occupational footwear, protective safety‑boots and labour‑protection shoes. Following ISO 20344 test principle, a complete shoe specimen sits inside temperature‑controlled sand‑bath cavity. Granular sand serves as heat‑conducting medium, and standard‑spec steel balls fill the shoe inner cavity. Temperature‑sensing probe tracks real‑time temperature‑rise on the insole surface during constant‑temperature exposure. By recording internal‑temperature‑variation over defined test duration, engineers judge whether footwear meets thermal‑insulation requirements for high‑temperature‑working‑scenarios.

This equipment complies with GB 21148‑2020, GB/T 20991, EN ISO 20344 / 20345 / 20346 / 20347 norms. It finds extensive deployment in PPE‑supervision‑institutes, safety‑product‑research‑centres, quality‑inspection‑authorities and safety‑shoe manufacturing enterprises for finished‑product verification and new‑material‑formula validation.

Core Product Competitive Advantages

High‑Efficiency Copper‑Alloy Heating‑Base for Uniform Thermal Output
Adopts high‑thermal‑conductivity copper heating‑plate assembly. It delivers rapid temperature‑ramp‑up and stable heat distribution across the whole sand‑bath area, minimising local hot‑spot deviation and guaranteeing repeatable test‑conditions for every footwear‑sample.
Dual‑Channel PT100 Precision Temperature‑Monitoring System
High‑accuracy PT100 platinum‑resistance sensors track both sand‑bath ambient‑temperature and real‑time insole‑surface temperature inside test‑shoe simultaneously. Digital display presents temperature‑readouts directly on front‑panel without manual‑recording errors. Built‑in temperature‑compensation algorithm further improves measuring‑precision.
Programmable Long‑Duration Timing Control Module
On‑board timer supports adjustable test‑period ranging from zero up to 99 hours. Operators set required holding‑time according to different‑standard clauses. System counts‑down automatically and reminds users once test‑cycle completes, reducing continuous manual‑supervision workload.
Standard‑Compliant Sand‑Bath Chamber with Protective‑Perforated‑Housing
400 × 400 mm large‑capacity sand‑bath container meets full‑size finished‑shoe placement requirements. Perforated high‑temperature‑resistant protective‑enclosure isolates high‑temperature sand‑bath, effectively lowering operator scald‑risk during lab‑operation.
Complete‑Set Standard‑Accessory Matching
Supplied with qualified 0.3‑1.0 mm test‑sand and 4 kg Φ5 mm stainless‑steel‑ball filling‑medium, users can start formal testing right after equipment installation without extra accessory‑procurement work. Adjustable levelling feet stabilise instrument on uneven lab‑floor surfaces.

Complete Technical Parameter Table

Parameter Item	KR‑624 Standard Specification
Sand‑Bath Inner Dimension	400 × 400 × 80 mm
Required Sand Filling Height	≥ 50 mm
Standard Sand Particle Size	0.3 ~ 1.0 mm
Internal Heat‑Transfer Medium	Φ5 mm steel‑balls, total weight 4 kg
Working Temperature Range	Room‑Temperature ~ 300 ℃; typical test‑set‑point:150 ℃ / 250 ℃
Temperature‑Control Accuracy	±2 ℃
Programmable Test‑Timer Range	0 ~ 99 h
Overall Outer Dimension(L×W×H)	500 × 510 × 340 mm

Compliance Standards: GB 21148‑2020, GB/T 20991, EN ISO 20344, EN ISO 20345, EN ISO 20346, EN ISO 20347

Standard Complete Test Operating Workflow

Pre‑Test Preparation
Position tester on fire‑safe horizontal lab‑location, adjust levelling feet. Fill sand‑bath cavity with qualified granular‑sand to height above 50 mm. Prepare finished‑shoe specimen and condition sample under standard‑atmosphere. Check PT100 temperature‑probe integrity. Power‑on unit, set target sand‑bath‑temperature and test‑holding‑duration according‑to‑relevant‑standard‑requirements. Allow sand‑bath to heat‑up and stabilise.
Specimen Loading & Probe Placement
Fill inside of test‑shoe with standard Φ5 mm steel‑balls. Install temperature‑measuring‑probe and make sure probe‑tip closely contacts central‑zone of shoe‑insole inner‑surface. Place the assembled footwear‑sample steadily inside pre‑heated sand‑bath chamber, cover perforated protective‑housing.
Thermal‑Insulation Test Execution
Initiate timing‑count‑down procedure. Maintain constant sand‑bath temperature throughout full test‑cycle. System continuously collects sand‑bath temperature and insole‑surface‑temperature data. Observe specimen status during the whole heating‑exposure‑period.
Test Completion & Data Recording
Upon timer expiry, heating‑procedure automatically terminates. Document temperature‑rise‑amplitude inside footwear. Inspect shoe‑outer‑surface for melting, softening or cracking‑damage phenomena. Evaluate thermal‑insulation performance of protective‑shoe according‑to‑standard‑threshold‑values.
Post‑Test Tidying
Wait for sand‑bath and shoe‑sample to cool‑down to safe‑handling‑temperature. Take‑out steel‑balls and test‑footwear. Clean sand‑granule residues inside sand‑bath cavity. Shut‑down main‑power‑supply. Regularly inspect sensor‑calibration‑status and replace ageing test‑sand as‑needed.

Wide Industrial Application Scenarios

Safety‑&‑Protective‑Footwear Manufacturing Plants

High‑temperature‑insulation‑performance QC inspection for finished‑labour‑protection‑shoes; screen sole‑material and lining‑material solutions for new‑product‑development.

PPE Quality‑Supervision & Inspection Institutions

Carry‑out sampling‑verification for batch‑produced safety‑footwear for market‑supervision‑purpose.

Footwear‑Material R&D Departments

Compare thermal‑barrier‑effect of diverse sole‑and‑lining‑composites, optimise high‑temperature‑resistant‑protective‑shoe‑design‑solutions.

University Footwear‑Engineering & Safety‑Protection‑Research‑Laboratories

Teaching‑research‑instrument for studying heat‑transfer‑behaviour of protective‑footwear‑structures.

Third‑Party Accredited‑PPE‑Testing‑Organizations

Conduct multi‑standard‑compliant finished‑shoe thermal‑insulation assessment and issue formal inspection‑documents for product‑certification‑audits.

Standard Factory‑Full‑Delivery Kit

KR‑624 finished‑shoe thermal‑insulation‑tester main‑unit
Complete sand‑bath container and perforated high‑temperature‑protective‑cover
PT100 temperature‑measuring‑probe assembly
Standard test‑sand (0.3‑1.0 mm particle‑size)
4 kg Φ5 mm stainless‑steel‑ball filling‑medium
Power‑supply connecting‑cable
Multilingual printed‑operation‑manual complying with GB 21148‑2020, EN ISO 20344 and associated‑standards
Factory‑issued performance‑inspection‑certificate

Optional spare‑parts: replacement temperature‑probe, extra‑consumption‑pack of test‑sand and steel‑balls.

Global Distributor & After‑Sales‑Support

We provide remote‑one‑on‑one operational guidance covering temperature‑parameter‑setting, specimen‑loading‑steps and daily‑consumable‑replacement. Spare‑parts stock includes PT100 sensors, heating‑plate‑components and test‑media‑accessories. Bulk‑order customers can apply for custom‑power‑supply‑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‑624 Sand‑Bath‑Type Finished‑Shoe Thermal‑Insulation Tester | ISO20344‑Compliant Protective‑Footwear High‑Temperature‑Resistance‑Performance‑Analyser

Core‑Feature‑Labels‑For‑Product‑Images

Safety‑Operation‑Reminder

Sand‑bath chamber generates extreme‑high‑temperature during running‑test; do not touch sand‑bath‑housing and sand‑granules. Always keep protective‑perforated‑cover closed while heating‑process‑is‑active. Allow sufficient cooling‑period before removing shoe‑sample and test‑media. Conduct periodic‑sensor‑verification to secure measuring‑reliability.

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Product Categories

KR‑624 Finished‑Footwear Thermal‑Insulation Performance Tester

KR‑624 Finished‑Footwear Thermal‑Insulation Performance Tester

Additional information

Product Details：

KR‑624 Finished‑Footwear Thermal‑Insulation Performance Tester

Product Overview

Core Product Competitive Advantages

Complete Technical Parameter Table

Standard Complete Test Operating Workflow

Wide Industrial Application Scenarios

Safety‑&‑Protective‑Footwear Manufacturing Plants