Moulding Concrete Blocks
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 ofMoulding Concrete Blocks
Moulding Concrete Blocks: The Complete Guide to UNIK Steel Mould Solutions
Precision-engineered steel moulds are the cornerstone of high-quality concrete block production. At Fujian Unik Mould Technology Co., Ltd., we specialize in manufacturing durable, high-precision moulds for interlocking concrete blocks, pavers, kerbstones, and hollow blocks. Based in Quanzhou, China-a region renowned for manufacturing excellence-UNIK has served customers in over 28 countries since 2010.
This guide provides comprehensive information about our steel mould solutions, helping you make informed decisions for your block production needs.
Selection Guide: Choosing the Right Steel Mould for Your Production
Selecting the correct mould is critical for production efficiency and product quality. Here are the key factors to consider:
1 Identify Your Block Type
| Block Type | Typical Applications | Mould Feature Priority |
|---|---|---|
| Interlocking Blocks | Retaining walls, slope protection, mortar-free construction | Complex cavity geometry, precise knob/pocket alignment |
| Hollow Blocks | Load-bearing walls, foundations | Core pin durability, dimensional consistency |
| Paving Stones | Driveways, walkways, public plazas | Surface finish, pattern precision |
| Kerbstones | Road edges, drainage channels | Heavy-duty construction, wear resistance |
| Grass Pavers | Green parking, erosion control | Open-cell design, clean release |
2 Match Mould Specifications to Your Production Volume
UNIK moulds are manufactured with the following standard specifications :
| Parameter | UNIK Standard | Industry Typical |
|---|---|---|
| Surface Hardness | HRC 58-62 (carburized) | HRC 45-50 |
| Core Hardness | HRC 35-40 (tough) | HRC 25-30 |
| Carburized Layer | 1.3-1.5mm | 0.8-1.0mm |
| Dimensional Tolerance | ±0.1mm | ±0.3mm |
| Surface Finish | Ra 1.6 or better | Ra 3.2 |
| Expected Service Life | 80,000 - 100,000 cycles | 50,000 - 70,000 cycles |
Technical Specifications: What Makes UNIK Moulds Different
1 Manufacturing Process
Every UNIK mould undergoes a controlled manufacturing sequence:
Multi-directional forging – transforms cast ingot into uniform grain structure
Precision CNC machining – achieves ±0.1mm tolerance on critical dimensions
Carburizing heat treatment – German technology for deep-case hardening (1.3-1.5mm layer)
Quenching and tempering – balances surface hardness with core toughness
Optional deep-cryogenic treatment (-196°C) – extends service life by over 30%
2 Key Technical Parameters for Interlocking Block Moulds
| Parameter | Specification |
|---|---|
| Unilateral clearance (presser foot to cavity) | 0.2mm - 0.4mm |
| Internal corner radius | 3-5mm (stress elimination) |
| Flatness of whole board | ≤0.5mm |
| Dimensional deviation per cavity | -0.3mm to +0.3mm |
| Height (filling depth) tolerance | ±0.5mm |
3 Quality Assurance
UNIK holds CE and SGS certifications, confirming compliance with European health, safety, and environmental protection standards. Every mould undergoes multi-stage inspection: raw material verification, in-process dimensional checks, hardness validation after heat treatment, and final dimensional measurement before shipping .
Customer Success Stories
Case 1: Large-Scale Retaining Wall Project – Southeast Asia
A contractor in the Philippines required 500,000 interlocking blocks for a slope protection project. Using UNIK interlocking concrete block moulds (HRC60 hardness, ±0.2mm tolerance), the customer achieved:
Zero dimensional rejects after first 50,000 cycles
30% faster laying time due to consistent block geometry
Mould still in service after 120,000 cycles
Case 2: Paver Production – Middle East
A paver manufacturer in UAE needed moulds capable of producing 100,000 sqm of decorative pavers annually. UNIK delivered modular moulds with interchangeable cavity inserts:
Reduced mould changeover time from 2 hours to 20 minutes
Extended service life to 95,000 cycles before first refurbishment
ROI achieved within 4 months
Case 3: Government Housing Project – West Africa
A Nigerian block maker supplying materials for a government housing project faced 15% reject rates with local moulds. After switching to UNIK moulds :
Reject rates dropped to 2%
Production output increased by 30%
Moulds shipped to Lagos within 25 days of order confirmation
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