KR-714 Drop Ball Rebound Resilience Tester for Flexible Foam & Sponge
Foam Material Drop Ball Rebound Resilience Test ISO 8307
Product Details:
1. GB can do 460 samples, 500 samples can make the U.S. standard. (National standard of similar
products can only do 460 samples)
2, LCD screen, the Chinese showed the same time increase the service life, easy to understand,
technicians can quickly grasp the method of operation. (Similar products for the digital display,
digital display only)
3. With printing, with printers. (Similar products without printing)
Product Details：
Product Overview
The KR-714 drop ball rebound tester is a dedicated laboratory measuring device built to quantify elastic recovery performance of flexible cellular polymer materials including PU sponge, EVA foams, shoe midsole materials and cushion foams. It operates on free-fall steel ball impact principle: a standardized steel ball falls from fixed calibrated height onto flat foam specimen, high-precision optical sensors capture maximum rebound height, and the host automatically computes rebound rate as the core elastic evaluation index.
This testing unit fully satisfies global mainstream testing norms: ISO 8307 international standard, ASTM D3574 American foam specification and GB/T6670 domestic polyurethane foam standard. Dual standard drop height configurations (460mm for GB, 500mm for ASTM) are integrated into one machine, eliminating the need for separate equipment for different inspection standards. Equipped with touch intelligent control and built-in thermal printing module, it is widely deployed in mattress factories, sports shoe material labs, packaging foam manufacturers and third-party polymer testing institutions for raw material incoming QC and finished product elastic performance verification.
Core Product Competitive Advantages
- Dual Standard Integrated Drop Height Design
One machine supports two certified falling heights: 460±0.5mm complying with Chinese national standard, 500±0.5mm matching US ASTM testing requirements. No extra structural modification is needed when switching test standards, greatly reducing lab equipment investment and saving bench space compared with single-specification rebound testers on the market.2.High-Sensitivity Optical Displacement Detection SystemHigh-speed photoelectric sensing array accurately tracks steel ball bounce trajectory, measurement overall error controlled below 1.5%. Stable signal acquisition avoids data deviation caused by light interference or slight sample unevenness, ensuring consistent repeat results after multiple parallel tests on the same foam specimen.3.7-Inch Touch Intelligent Operating SystemFull color bilingual touch interface replaces outdated digital single-line displays, all test parameters, real-time rebound height and calculated elasticity percentage are displayed on one screen. The system automatically stores groups of test data and computes average rebound value after multiple sampling points, removing manual calculation workload for inspectors.4.Built-In On-Site Data Printing FunctionIntegrated miniature thermal printer outputs complete test reports containing serial number, sample info, single rebound data and average elasticity rate instantly after testing. Paper records can be directly filed for factory quality archives and third-party audit submissions, a feature unavailable on many basic rebound test devices.5.Horizontal Calibration & Detachable Sample StageThe base is fitted with bubble level gauge and four adjustable leveling foot pads, operators quickly calibrate the platform to absolute horizontal state before testing to eliminate tilt-induced measuring errors. Pull-out sliding sample tray simplifies fast specimen replacement and cleaning between different foam batches.6.Safe Closed Falling Barrel StructureTransparent protective vertical barrel prevents steel ball splashing during impact testing, effectively avoiding workplace safety hazards. Magnetic ball release mechanism ensures pure free fall without extra initial thrust, fully conforming standard test force conditions and guarantee authentic elastic data of foam materials.
Complete Technical Parameter Table
| Parameter Item | KR-714 Standard Configuration |
|---|---|
| Standard Drop Heights | 460±0.5mm (GB) / 500±0.5mm (ASTM) switchable |
| Standard Steel Ball Spec | Diameter Φ16±0.05mm, standard mass |
| Measurement Precision | Rebound rate error ≤1.5% |
| Standard Specimen Dimension | 100mm × 100mm × 50mm flat foam block |
| Control Terminal | 7-inch bilingual color touch screen |
| Data Output Mode | Real-time screen display + built-in thermal print |
| Calculation Function | Auto single value recording + automatic average calculation |
| Base Calibration Tool | Built-in bubble level + adjustable support feet |
| Power Input | Single-phase AC220V 50Hz |
| Complete Machine Weight | Approx 20kg |
Standard Full Test Operation Process
- Equipment Horizontal Calibration
Adjust four bottom foot pads and observe the bubble level until centered, confirm the sliding sample tray stays perfectly horizontal to avoid inclined specimen affecting ball bounce path.
- Specimen Placement
Cut foam material into standard 100×100×50mm block, remove surface dust and place flat on the central area of the pull-out sample platform, push the tray fully into the testing barrel base.
- Standard Parameter Selection
Power on touch control panel, select corresponding standard mode (GB 460mm / ASTM 500mm), set sampling times (3~5 groups per sample) and start standby state.
- Free-Fall Rebound Test
Place the standard steel ball into the top magnetic holder, tap the test start button; the ball releases automatically for free fall impact. Optical sensors record peak rebound height instantly.
- Data Statistics & Report Printing
After finishing preset sampling cycles, the microcomputer auto averages all rebound rate values. Operators tap print button to generate full test record paper report with all data retained.
- Post-Test Cleaning & Storage
Pull out sample tray, remove tested foam residue, wipe the transparent falling barrel inner wall to prevent dust accumulation interfering subsequent detection, cut power when daily testing finishes.
Wide Industrial Application Scenarios
Bedding & Mattress Manufacturing
Polyurethane mattress sponge, memory foam cushion, latex foam raw material elasticity testing; evaluate sleep comfort and long-term anti-sag performance of foam fillers.
Sports Shoe Material Industry
EVA midsole, supercritical foaming materials, shoe insole foam, shock absorption cushion testing; compare rebound efficiency of different foaming formulations for athletic footwear design.
Packaging Foam Production
Anti-shock buffer foam, logistics protective foam sheets, electronic device packaging foams; verify energy absorption and rebound capacity for product anti-drop packaging design.
Furniture & Home Cushion Factory
Sofa sponge, seat cushion foam, children toy soft foam batch inspection; control consistent elastic handfeel of finished soft furnishing products.
Material Testing Labs & R&D Institutes
University polymer research labs, CNAS certified third-party inspection centers, foam new formulation development departments; standardized elastic performance compliance testing for market access certification.
Standard Factory Delivery Kit
- KR-714 foam drop ball rebound tester main unit
- Standard Φ16mm precision test steel ball set
- Transparent protective vertical falling barrel & magnetic ball release assembly
- Built-in thermal printer with spare print paper rolls
- Bubble horizontal calibration level & adjustable leveling foot assembly
- Detachable sliding sample holding tray
- Multilingual operation manual aligned with ISO/ASTM/GB standards
- Factory calibration inspection qualification certificate
Global Distributor & After-Sales Support
We provide one-on-one remote operation training and standard test procedure guidance, with long-term stable supply of replacement steel balls, optical sensor modules and printer spare parts. Custom voltage versions for overseas 60Hz power grids are available for bulk purchase orders. Exclusive regional agent policies include priority production scheduling, OEM private brand labeling and full sets of high-definition marketing product images.
English Overlay Text For All Product Pictures
Main Banner Title: KR-714 Dual-Standard Foam Drop Ball Rebound Resilience Tester
Control Panel Tags: STANDARD SELECT / TEST START / DATA PRINT / AVERAGE CALC
Feature Overlay Tags: GB & ASTM Dual Drop Height / ≤1.5% High Precision / Touch Intelligent Control / Built-In Report Printer / Horizontal Calibration Base
Safety Operation Tip: Keep Protective Barrel Closed During Ball Impact Testing
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