Precast Slab Moulds

Selection Guide: Choosing the Right Precast Slab Mould

Selecting an appropriate precast slab mould requires balancing material specifications, production volume, dimensional accuracy, and machine compatibility. The following parameters are essential for evaluation.

1 Material & Heat Treatment

The base material determines mould lifespan and wear resistance. UNIK manufactures slab moulds from low-carbon alloy steel (e.g., 42CrMo) with carburizing heat treatment . This process creates a hardened surface while retaining a tough core, preventing deformation under high-vibration compaction.

Surface Hardness: HRC 57–62

Carburized Layer Thickness: 1.1–1.5 mm

Flatness Tolerance: ≤ 0.5 mm across the entire mould plate

Dimensional Precision: ±0.12 mm to ±0.3 mm for cavity dimensions

2 Design & Configuration

Depending on your production requirements, choose between single-cavity and multi-cavity designs. Multi-cavity moulds increase output per machine cycle but require higher press capacity.

Critical Consideration: Ensure the mould's closing mechanism and presser foot clearance match your existing block machine. UNIK's standard design maintains a unilateral clearance of 0.2–0.4 mm between the presser foot and cavity, optimizing compaction without material leakage .

3 Customization Capabilities

Standard moulds may not suit unique project specifications. OEM/ODM services allow customization based on:

Customer-supplied samples or CAD drawings

Specific edge profiles (chamfered, rounded, interlocking)

Surface textures (smooth, exposed aggregate, anti-slip patterns)

Reinforcement configurations for structural slabs

Frequently Asked Questions (FAQ)

Q1: What is the typical lifespan of a UNIK precast slab mould?
Under standard production conditions (proper maintenance, appropriate concrete mix), UNIK slab moulds consistently deliver 60,000 to 100,000 cycles. The modular design allows replacement of individual cavities or wear plates, extending overall service life beyond 450,000 cycles for high-use components .

Q2: How do I resolve demoulding issues such as sticking or surface damage?
Sticking usually results from insufficient draft angle, inadequate surface finish, or ejector pin wear. UNIK moulds feature chrome-plated cavities and precision-polished surfaces to minimize friction. If issues arise, inspect ejector pin condition and verify the mould is not overloaded beyond its 100-ton compression rating.

Q3: Are these moulds compatible with my existing block making machine?
Yes. UNIK moulds are designed to integrate with more than 20 leading block machine brands, including Zenith, Columbia, Hess, and others. Provide your machine's brand, model, and mounting interface specifications during ordering to ensure perfect fitment .

Q4: What certifications do UNIK moulds carry?
All moulds are manufactured under ISO 9001:2015 certified quality management systems. UNIK also holds CE and SGS certifications, ensuring compliance with international safety and quality standards .

Q5: What is your lead time and shipping process?
Following drawing approval, production typically requires 15–25 days. Moulds are shipped FOB from Xiamen or Quanzhou port in ISPM 15-compliant, fumigated wooden crates with foam protection. Each shipment includes a commercial invoice, packing list, and bill of lading .

Q6: Do you provide after-sales technical support?
Yes. UNIK offers a 12-month warranty, spare parts supply from regional warehouses (Kenya, Philippines, Saudi Arabia, Russia), refurbishment services, and same-day technical assistance via video call or email .