At Lovri Quartz Products Co., Ltd., we combine vertical integration with strict quality management systems. Operating out of Lianyungang, China, our 14,271 m² production facility houses modern purification equipment, electric thermal fusion draw towers, multi-axis CNC grinding centers, and certified metrology labs. By governing every fabrication step internally—from crystal beneficiation to optical polarization stress inspection—we provide international OEMs with uncompromising dimensional precision, batch traceability, and thermal durability.
Every stage follows ISO-aligned production protocols to ensure structural purity, eliminate micro-bubbles, and eliminate internal residual strain.
Selected high-grade natural silica lumps are cut and physically pre-classified to eliminate external rock matrices.
Industrial impact pulverizers crush graded quartz into tightly controlled sand meshes ready for chemical purification.
Vibratory grading screens isolate specific grain dimensions, preventing melt defects and structural anomalies.
Multi-stage acid de-ironing and ultrasonic chemical washing remove trace transition metals, elevating purity to ≥ 99.99% SiO₂.
Electric vacuum resistance furnaces melt purified silica into mother cylinders and precisely controlled tubing geometries.
Gradual thermal soaking and computerized cool-down cycles eliminate internal mechanical stress and prevent thermal shock.
Precision hydrogen-oxygen glass lathes form dome, flat, or test-tube bottom closures with tight wall uniformity.
Certified quartz glass blowers join complex joints, flanges, ports, and capillary tubes without thermal cracking.
High-vacuum pumping units evacuate assemblies intended for specialized thermal insulation, UV, or semiconductor sleeves.
Diamond-tooled 4-axis and 5-axis CNC machines perform slotting, drilling, bevelling, and micro-grooving down to ±0.02 mm.
Laser calipers, optical projectors, and polarization testers verify wall runout, transmission values, and stress profiles.
Ultrasonic cleaning followed by PE foam wrap, shock-dampening vacuum packaging, and reinforced ply-wooden casing.
Modern equipment engineered specifically for the extreme softening temperatures (>1700°C) and diamond-machining characteristics of fused quartz.
High-torque diamond-wheel cutters deliver chipping-free end faces and square cuts on heavy-wall quartz tubes and blocks.
Dual-chuck synchronized rotation ensures concentric sealing and balanced thermal profiling during end bottom formation.
Programmable multi-zone heating chambers accommodating parts up to 3 meters in length for full thermal relief.
Integrated dimensional measurement benches equipped with non-contact laser micrometers and profile projectors.
Custom packaging stations featuring vacuum sealing, electrostatic discharge wrappers, and custom-fit EPE foam inserts.
Abrasion-resistant lining prevents metal contamination while converting quartz chunks into uniform granular sizes.
High-frequency sieving units filter out out-of-spec granules, securing uniform density during fusion.
Acid-resistant fluoropolymer leaching tanks equipped with ultrasonic transducers for maximum chemical extraction.
Wrapping unit protecting finished quartz tubes, plates, and boats against vibration during multimodal export freight.
Laser-guided pull towers generating quartz tubes with consistent outside diameter and minimal wall runout.
Dedicated furnaces stabilizing internal quartz glass networks and removing structural strains post-welding.
High-accuracy mechanical lathes suited for large-diameter semiconductor furnace tube ends and quartz flanges.
Multi-stage turbomolecular vacuum rigs engineered for specialized vacuum-jacketed quartz components.
High-rigidity quartz CNC milling centers executing complex wafer boats, 96-well microplates, and custom optical blocks.
Cleanroom testing environment housing spectrophotometers, interferometers, and microscopic optical analyzers.
Quartz components subjected to rapid thermal transitions or vacuum seals require virtually zero residual birefringence. Even minute interior stress fields can trigger cataclysmic fracture under industrial furnace conditions.
At Lovri Quartz Products Co., Ltd., every single welded assembly, thick-wall tube, and optical plate undergoes quantitative polarization stress testing. This non-destructive inspection validates that annealing has effectively relieved mechanical tension, guaranteeing superior thermal-shock resistance for high-temperature semiconductor and laser environments.
Speak directly with our technical engineers. We offer rapid DFM feasibility reviews, prototype sampling, and certified volume delivery.