China Hollow Paver Blocks Moulds
2.Hardness for shoes:HRC59-62
3.Carburized layer thickness:1.3-1.5mm
4.Unilateral clearance between presser foot and mold cavity: 0.2 mm ≤ Unilateral clearance ≤ 0.4mm
5.Flatness of the whole board: ≤ 0.5mm
6.Deviation in length and width dimensions of a single cavity model: -0.3 to+0.3mm
7.The dimensional deviation of the height (filling depth) of the lower model cavity is ± 0.5mm
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Product Details ofChina Hollow Paver Blocks Moulds
China Hollow Paver Blocks Moulds
Lowering the Cost of Offering Multiple Paver Styles
A block plant that produces only one paver style has a simple tooling decision. A plant that produces five paver styles faces a different problem. Traditional moulds require a complete set for each style - five outer frames, five cavity sets, five mounting interfaces. The capital tied up in idle moulds grows quickly.
Chinese mould manufacturers have addressed this problem by developing insert systems. One outer frame serves multiple cavity inserts. The frame stays on the machine. Inserts change when the paver style changes. This page explains how the system works and what buyers should verify before purchasing from China.
UNIK has been manufacturing hollow paver blocks moulds in Quanzhou since 2010, exporting to 28 countries. The company's approach focuses on reducing tooling costs without compromising dimensional accuracy or service life.
Why Chinese Manufacturers Lead in Insert Mould Production
Several factors have made Chinese manufacturers particularly effective at producing insert mould systems.
Steel availability. Alloy tool steels such as Cr12MoV and 9CrSi are readily available from domestic mills. These grades provide the hardness and toughness combination required for cavity inserts.
Heat treatment capacity. Vacuum quenching furnaces and deep-cryogenic treatment equipment have become standard in leading Chinese factories. This allows consistent hardening to HRC59-62 without warping or cracking.
CNC machining scale. Wire-cutting and CNC milling equipment is widely available. Chinese manufacturers can produce cavity inserts with dimensional tolerance of ±0.3mm and surface finish of Ra 1.6 or better at competitive prices.
Export experience. Chinese mould manufacturers have been shipping to Southeast Asia, the Middle East, Africa, and Russia for over a decade. Documentation, packaging, and logistics systems are well established.
What to Verify Before Ordering from China
Buyers should confirm four items before placing an order for hollow paver blocks moulds from any Chinese supplier.
Steel grade. Request material certificates specifying Cr12MoV, 9CrSi, or equivalent. Unspecified "high-grade steel" is not sufficient. The steel grade directly affects wear resistance and service life.
Heat treatment documentation. Ask for hardness test reports showing surface hardness (minimum HRC58) and carburized layer depth (minimum 1.3mm). Proper heat treatment is the difference between a mould that lasts 90,000 cycles and one that cracks at 30,000 cycles.
Dimensional inspection. Request final inspection reports with cavity dimensions, corner radii, and flatness measurements. Tolerances should be clearly stated. UNIK holds cavity dimensions to ±0.3mm and surface finish to Ra 1.6.
Machine compatibility. Provide the supplier with your machine brand and model, or send a drawing of your existing mould's mounting interface. The supplier should confirm fit before production begins. UNIK maintains mounting specifications for HESS, MASA, ZENITH, BESSER, TIGER, Qunfeng, Quangong, and other major brands.
Common Hollow Paver Sizes from Chinese Moulds
Chinese manufacturers produce inserts for a range of hollow paver dimensions. The most common sizes include:
200 x 100 x 60mm – Standard residential driveway and walkway paver. This size accounts for approximately 40% of hollow paver production in many markets.
225 x 112.5 x 60mm – Interlocking hollow paver for driveways and parking areas. The interlocking edges distribute vehicle loads across multiple pavers.
400 x 200 x 80mm – Large-format hollow paver for commercial plazas and light vehicle areas. Fewer pavers per square meter reduces installation time.
333 x 166 x 80mm – Grass hollow paver with open cells for permeable parking and erosion control applications.
200 x 200 x 60mm – Hexagonal hollow paver for garden paths and decorative areas.
Custom sizes are available. Most Chinese manufacturers require a drawing or existing paver sample to produce matching inserts. UNIK offers custom design based on customer specifications.
Manufacturing
Delivery
workshop
Process
UNIK's Specifications for Hollow Paver Inserts
UNIK manufactures hollow paver inserts to the following standards:
Steel grade: Cr12MoV or 9CrSi alloy tool steel
Heat treatment: Carburizing with vacuum quenching at 980°C and multiple tempering cycles at 580°C
Surface hardness: HRC59-62
Core hardness: HRC35-40
Carburized layer depth: 1.3-1.5mm
Dimensional tolerance: ±0.3mm
Surface finish: Ra 1.6 or better
Corner radius: 3-5mm on all internal corners
Expected insert lifespan: 70,000-90,000 cycles under normal conditions
Expected frame lifespan: 200,000+ cycles
Optional deep-cryogenic treatment to -196°C extends insert service life by over 30%. UNIK has documented deliveries including a complete wave-type paver production line to Sri Lanka (2025) and concrete equipment to Kenya (2026).
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