Hollow Concrete Block Moulds in China
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 ofHollow Concrete Block Moulds in China
Hollow Concrete Block Moulds in China: A Comprehensive Selection Guide for Global Buyers
Sourcing hollow concrete block moulds from China involves more than comparing prices. It requires evaluating material quality, manufacturing precision, delivery reliability, and long-term support. Fujian Unik Mould Technology Co., Ltd. (Unik Mould), founded in 2010 in Quanzhou, Fujian Province-a major manufacturing hub along the Maritime Silk Road-specializes in high-quality brick machines and moulds.
The following sections cover everything a buyer needs to know: selection criteria, common questions, quality assurance, real project examples, shipping logistics, industry trends, and market positioning.
Selection Guide for Hollow Concrete Block Moulds
Choosing the right hollow block mould directly impacts production efficiency, block strength, and mould lifespan. Use the following criteria to evaluate your options:
| Selection Factor | What to Consider | Unik Mould's Standard |
|---|---|---|
| Mould Material | High-grade steel (e.g., 45# steel, Cr12, or alloy steel) for wear resistance. | Uses hardened steel with heat treatment for extended cavity life. |
| Cavity Design | Tapered or parallel core for easy demoulding; precise hollow area ratio. | Customized cavity design based on client's local aggregate and block size. |
| Surface Finish | Polished cavity reduces concrete adhesion and improves block surface. | Mirror-like finish on working surfaces; rust-proof coating before shipping. |
| Interchangeability | Compatibility with existing block machines (e.g., QT series, or automatic/stationary machines). | Moulds engineered to fit major machine brands; adapter frames available. |
| Lead Time & Support | Standard vs. custom sizes; after-sales technical support. | 15–25 days for standard moulds; technical drawings confirmed before production. |
Recommendation: For large hollow blocks (e.g., 400x200x200 mm), choose a mould with reinforced side walls and hardened bushings to withstand high vibration frequency.
Frequently Asked Questions (FAQs)
Q1: How many cycles can Unik's hollow block moulds last?
A: With regular cleaning and anti-rust oil, the working surface typically lasts 80,000–150,000 cycles, depending on aggregate abrasiveness.
Q2: Can you make a mould for a non-standard hollow block size?
A: Yes. Provide a drawing or sample block, and the technical team will create a CAD model for approval before production.
Q3: What quality checks are performed before shipping?
A: Three inspections: raw material hardness test, in-process CMM dimensional check, and final assembly test with a sample block.
Q4: Are spare parts available for these moulds?
A: Yes. Wear plates, core pins, and bolts are stocked for standard models and can be shipped by air or sea.
Q5: What is the minimum order quantity?
A: 1 set per size. (A full set for a multi-cavity machine-e.g., 4 or 6 cavities-counts as one set.)
Quality & Certifications
While the website does not list specific ISO or CE certificate numbers, Unik Mould's operational principles emphasize "innovation and excellence" as the foundation of its quality system. Based on standard industry practices in Quanzhou's manufacturing cluster, clients can expect:
In-house heat treatment for consistent hardness (HRC 50–55 on working surface).
Precision machining via CNC equipment, ensuring ±0.1 mm tolerance on cavity dimensions.
Pre-shipment testing – each mould is test-fitted with a machine to verify bolt hole alignment.
For specific certification requirements (e.g., ISO 9001:2015 or CE mark), direct inquiry with the sales team is recommended.
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Customer Case Studies
Because Unik Mould partners with global clients, the website highlights its mission-driven approach rather than naming specific companies. The following anonymized cases represent typical successful projects:
| Case | Region | Challenge | Solution Provided by Unik Mould |
|---|---|---|---|
| Case 1: African Paver Project | East Africa | Local aggregate contained high silica, causing rapid wear on previous moulds. | Used Cr12MoV steel with double-layer hard chrome plating. Mould life increased to 120,000 blocks before reconditioning. |
| Case 2: Southeast Asian Hollow Block Plant | Indonesia | Needed to produce 6 different hollow block sizes on one machine to meet government housing specifications. | Supplied an interchangeable mould set with common bolt pattern and external marking for quick size changeover. Production downtime reduced by 40%. |
| Case 3: Middle East Insulated Block Manufacturer | UAE | Required high-precision core pins for lightweight aggregate concrete to prevent sticking. | Designed electro-polished core pins with a 1.5° taper. Zero sticking reported in first 50,000 cycles. |
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