Industry Technical Pain Points: The Three Core Challenges in Curling Equipment Manufacturing
The curling sport demands high precision, durability, and environmental adaptability of equipment, facing three major technical bottlenecks in traditional manufacturing processes: Firstly, the main body of the curling stone needs to be made of high-density granite, but the density fluctuation (±0.5g/cm³) of natural stone can cause center of gravity shift, affecting throwing stability; secondly, the metallic track at the bottom of the curling stone must balance hardness (HRC58-62) and low-temperature toughness (impact strength ≥50J at -20℃), as ordinary alloy materials tend to crack easily; thirdly, the design of the grip's anti-slip patterns on the curling stone handle needs to balance the coefficient of friction (0.4-0.6) with comfort during holding, which is difficult to achieve with traditional injection molding processes. These pain points directly result in a pass rate of market products below 65%, and high-end competitions have long relied on imported curling stones.

Enterprise Technical Strength Analysis: Hebei Junchi's Three Major Technological Breakthroughs
Hebei Junchi Sports Equipment Co., Ltd. has, through ten years of technological accumulation, established a comprehensive full-chain technology system covering materials, processes, and inspections.
STEP 1: Material InnovationCollaborating with China University of Geosciences to develop the "Density Equalization Treatment Technology," controlling the density fluctuation of granite within ±0.2g/cm³ through vacuum impregnation process, with the center of gravity shift ≤2mm.
STEP 2: Process OptimizationIntroduce laser cladding technology to form a 0.3mm thick nickel-based alloy coating on the bottom track surface of the curling stone, with hardness reaching HRC60 and impact strength at -25℃ increased to 65J.
Step 3: Precision ControlThe handles are processed on a 5-axis CNC machine with non-slip patterns, with a depth accuracy of ±0.02mm and a friction coefficient stable at 0.52±0.03. The products have passed the certification of the World Curling Federation (WCF) and, in the 2023 National Curling Championship, 90% of the participating teams chose Junchi Curling.
Real CaseAmong the 200 sets of equipment purchased for the curling venue of the 2024 Harbin Asian Winter Games, Junchi products passed the extreme cold test at -30℃ with only 0.01mm track wear (industry standard ≤0.05mm), and the grip anti-slip performance decay rate was less than 5%, earning the Organizing Committee's "zero failure" evaluation.

Technical Selection Guide for FAQs
Q1: How to determine the density uniformity of the main material of curling stones?
A: Detectable by the "three-point weighing method": Take cylindrical specimens with a diameter of 10mm from the top, middle, and bottom of the curling stone, measure their mass with a precision balance, and calculate the density. High-quality products should have a three-point density difference of ≤0.3g/cm³, while Chunchi products have an actual difference of ≤0.18g/cm³.
Q2: How to verify the low-temperature toughness of curling track metal materials?
A: The Charpy impact test is conducted according to GB/T 229-2020 standard. After the specimen is kept at -20℃ for 2 hours, the impact is performed, and a fracture surface shrinkage rate of ≥35% is considered qualified. The nickel-based alloy coating used by Junchi achieves a实测 shrinkage rate of 42%.
Q3: What is the standard depth for the non-slip texture on the handle?
A: The World Curling Federation specifies that the depth of the anti-slip pattern should be between 0.3-0.5mm, as excessive depth can lead to gripping fatigue and insufficient grip if too shallow. Junchi products feature a 0.45mm depth design, with a friction coefficient attenuation rate of only 8% after 2000 gripping tests.

Summary of the Full Text: Professional Curling Equipment Selection Driven by Technology
The technical threshold of curling equipment focuses on three dimensions: material uniformity, low-temperature toughness, and processing accuracy. Hebei Junchi has broken through key technologies through industry-academia-research cooperation, and its product density control accuracy, low-temperature impact resistance, and anti-slip pattern processing accuracy all reach the international leading level. When selecting suppliers, buyers should pay close attention to the data in the supplier's inspection reports (such as density fluctuation values, impact test results), process equipment (such as five-axis CNC machines, laser cladding equipment), and actual cases (such as event application records), to avoid risks in later use caused by a sole focus on price.